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HomeMy WebLinkAbout2026.05.07 Item 6c Attachment 2 of 3 Appendices Volume 2 of 3 - Appendices 1. Project Stormwater Pollution Prevention Plan, Lumos and Associates 2. TRPA — Signed Project Permit 3. USFS Special Use Permit Amendment - Signed 4. USFS Decision Memo - Executed 5. USFS Resource Protection Measures 6. 2026 Right of Way Encroachment Permit 7. Geotechnical Report, CME 2026 Pioneer Trail Waterline Project(Rebid) 1. Project Stormwater Pollution Prevention Plan, Lumos and Associates 2026 Pioneer Trail Waterline Project(Rebid) STORM WATER POLLUTION PREVENTION PLAN for 2026 Pioneer Trail Waterline Project WDID Number: xxxxxxxxxxxx Legally Responsible Person (LRP): Trevor Coolidge, PE South Tahoe Public Utility District 1275 Meadow Crest Drive South Lake Tahoe, CA 95150 530.543.6278 Approved Signatory: Trevor Coolidge, PE 530.543.6278 Project Address: Pioneer Trail - Susquehanna Drive to Marshall Trail South Lake Tahoe, CA 96150 SWPPP Prepared by: Julia Ashton Lumos &Associates 312 Dorla Court, Suite 202 Zephyr Cove,NV 89448 775.588.6490 SWPPP Preparation Date February 13,2026 Estimated Project Dates: Start of Construction: Completion of Construction: May 1, 2026 October 15, 2026 Table of Contents Table of Contents i Qualified SWPPP Developer 1 Legally Responsible Person 1 Amendment Log 2 Section 1 SWPPP Requirements 3 1.1 SWPPP Objectives 3 1.2 Permit Registration Documents 3 1.3 Training 4 1.4 QSP Management and Weekly Training Plan Implementation 4 1.5 Contractor list 6 1.6 Emergency Contact Person and 24-hour Phone Numbers 6 1.7 SWPPP Availability and Implementation 6 1.8 SWPPP Amendments 6 Section 2 Project Information 8 2.1 Project and Site Description 8 2.1.1 Site Description 8 2.1.2 Existing Conditions 8 2.1.3 Existing Drainage 8 2.1.4 Geology and Groundwater 8 2.1.5 Project Description 9 2.1.6 Developed Condition 9 2.2 Permits and Governing Documents 9 2.3 Stormwater Run-On from Offsite Areas 10 2.4 Construction Schedule 10 2.5 Potential Construction Activity and Pollutant Sources 11 2.6 Identification of Non-Stormwater Discharges 12 2.7 Required Site Map Information 13 Section 3 Best Management Practices 14 3.1 Site Management 14 3.2 Erosion and Sediment Control 14 3.2.1 Erosion Control 15 2026 Pioneer Trail Waterline Project 1 February 13, 2026 3.2.2 Sediment Controls 17 3.3 Non-Stormwater Controls and Waste and Materials Management 20 3.3.1 Non-Stormwater Controls 20 3.3.2 Materials Management and Waste Management 24 3.4 Post Construction Stormwater Management Measures 27 Section 4 BMP Inspection,Maintenance, and Rain Event Action Plans 28 4.1 BMP Inspection and Maintenance 28 4.2 Rain Event Action Plans 28 Section 5 Construction Site Monitoring Program 30 5.1 Purpose 30 5.2 Weather and Rain Event Tracking 30 5.2.1 Weather Tracking 30 5.2.2 Rain Gauges 30 5.3 Monitoring Locations 31 5.4 Safety and Monitoring Exemptions 31 5.5 Visual Monitoring 31 5.5.1 Routine Observations and Inspections 32 5.5.1.1 Routine BMP Inspections 32 5.5.1.2 Non-Stormwater Discharge Observations 32 5.5.2 Rain-Event Triggered Observations and Inspections 32 5.5.2.1 Visual Observations Prior to a Forecasted Qualifying Rain Event 33 5.5.2.2 BMP Inspections During an Extended Storm Event 33 5.5.2.3 Visual Observations Following a Qualifying Rain Event 33 5.5.3 Visual Monitoring Procedures 33 5.5.4 Visual Monitoring Follow-Up and Reporting 34 5.5.5 Visual Monitoring Locations 34 5.6 Water Quality Sampling and Analysis 34 5.6.1 Sampling and Analysis Plan 34 5.6.2 Sampling for pH and Turbidity 35 5.6.3 Sampling for Non-Visible Pollutants 36 5.6.4 Sample Collection and Handling 37 5.6.4.1 Sample Collection 37 5.6.4.2 Sample Handling 37 2026 Pioneer Trail Waterline Project it February 13,2026 5.6.4.3 Sample Documentation Procedures 38 5.7 Quality Assurance and Quality Control 38 5.7.1 Field Logs 39 5.72 Clean Sampling Techniques 39 5.7.3 Chain of Custody 39 5.7.4 QA/QC Samples 39 5.7.4.1 Field Duplicates 39 5.7.4.2 Equipment Blanks 40 5.7.4.3 Field Blanks 40 5.7.4.4 Travel Blanks 40 5.7.5 Data Verification 40 Section 6 Reporting and Record Keeping 42 6.1 Retention of Records 42 6.2 Discharge Reporting 42 6.3 Regulatory Agency Notice or Order Reporting 42 6.4 Annual Report 43 6.5 Notice of Termination 43 CSMP Attachment 1: Weather Reports 44 CSMP Attachment 2: Monitoring Records 45 CSMP Attachment 3: Example Forms 46 Appendix A: Site Maps 51 Appendix B: Permit Registration Documents 52 Appendix C: SWPPP Amendment Certifications 53 Appendix D: Construction Schedule 56 Appendix E: CASQA Stormwater BMP Handbook Portal: Construction Fact Sheets 57 Appendix F: BMP Inspection Form 58 Appendix G: REAP 63 Appendix H: Training 66 Appendix I: Construction General Permit 68 2026 Pioneer Trail Waterline Project 111 February 13, 2026 Qualified SWPPP Developer Approval and Certification of the Stormwater Pollution Prevention Plan Project Name: 2026 Pioneer Trail Waterline Project Project Number/ID WDID# "This Stormwater Pollution Prevention Plan and Attachments were prepared under my direction to meet the requirements of the General Waste Discharge Requirements and National Pollution Discharge Elimination System General Permit for Storm Water Discharges Associated with Construction Activity in the Lake Tahoe Hydrologic Unit,Counties of Alpine,El Dorado, and Placer (Order No. R6T-2016-0010,NPDES No. CAG616002).I certify that I am a Qualified SWPPP Developer in good standing as of the date signed below." QSD Signature Date Julia Ashton C96958 QSD Name QSD Certificate Number Project Engineer, Lumos&Associates 775.588.6490 Title and Affiliation Telephone Number jashton@lumosinc.corn Email 2026 Pioneer Trail Waterline Project 1 February 13,2026 Legally Responsible Person Approval and Certification of the Stormwater Pollution Prevention Plan Project Name: 2026 Pioneer Trail Waterline Project "I certify under penalty of law that this document and all Attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information,to the best of my knowledge and belief,the information submitted is,true,accurate,and complete. I am aware that there are significant penalties for submitting false information,including the possibility of fine and imprisonment for knowing violations." Trevor Coolidge Legally Responsible Person Signature of Legally Responsible Person or Approved Date Signatory Name of Legally Responsible Person or Approved Telephone Number Signatory 2026 Pioneer Trail Waterline Project 1 February 13,2026 Amendment Log Project Name: 2026 Pioneer Trail Waterline Project W D I D XXXX Amendment Date Brief Description of Amendment,include Prepared and Approved No. section and page number By Name: QSD# Name: QSD# Name: QSD# Name: QSD# Name: QSD# Name: QSD# Name: QSD# Name: QSD# Name: QSD# 2026 Pioneer Trail Waterline Project 2 February 13,2026 Section 1 SWPPP Requirements 1.1 SWPPP OBJECTIVES This Stormwater Pollution Prevention Plan(SWPPP) is designed to comply with California's General Waste Discharge Requirements and National Pollution Discharge Elimination System General Permit for Storm Water Discharges Associated with Construction Activity in the Lake Tahoe Hydrologic Unit,Counties of Alpine,El Dorado, and Placer(Order No.R6T-2016-0010,NPDES No. CAG616002) issued by the State Water Resources Control Board(State Water Board). This SWPPP is designed to address the following: • Pollutants and their sources, including sources of sediment associated with construction, construction site erosion and other activities associated with construction activity are controlled; • Where not otherwise required to be under a Regional Water Quality Control Board (Regional Water Board)permit, all non-storm water discharges are identified and either eliminated, controlled, or treated; • Site BMPs are effective and result in the reduction or elimination of pollutants in storm water discharges and authorized non-storm water discharges from construction activity to the Best Available Technology/Best Control Technology(BAT/BCT) standard; • Calculations and design details for BMPs are complete and correct; and • Permanent BMPs are designed to eliminate or reduce pollutants after construction is complete. 1.2 PERMIT REGISTRATION DOCUMENTS Required Permit Registration Documents (PRDs) shall be submitted to the State Water Board via the Stormwater Multi Application and Report Tracking System(SMARTS)by the Legally Responsible Person(LRP), or authorized personnel (i.e., Approved Signatory)under the direction of the LRP. The project-specific PRDs include: 1. Notice of Intent(NOI); 2. Site Map; 3. Annual Fee; 4. Signed Certification Statement (LRP Certification is provided electronically with SMARTS PRD submittal); and 5. SWPPP. Site Maps can be found in Appendix A. A copy of the submitted PRDs shall also be kept in Appendix B along with the Waste Discharge Identification (WDID) confirmation. 2026 Pioneer Trail Waterline Project 3 February 13,2026 1.3 TRAINING This SWPPP was developed by a Qualified SWPPP Developer(QSD), Julia Ashton, PE. Ms. Ashton meets the qualifications and certification requirements of the General Permit based on: • California Registered Professional Engineer#C96958 • California State Waterboard QSD Certification#C96958 The QSD has received the following training: See Appendix H The QSD will prepare any required changes to this SWPPP. 1.4 QSP MANAGEMENT AND WEEKLY TRAINING PLAN IMPLEMENTATION The SWPPP will be implemented by the site contractor and a Qualified SWPPP Practitioner (QSP)will oversee implementation of the SWPPP to ensure all required BMPs are implemented appropriated and recommend any modifications to the SWPPP based on site specific issues of concern to the QSD. The QSP shall have primary responsibility and significant authority for the implementation, maintenance and inspection/monitoring of SWPPP requirements. The QSP will be available at all times throughout the duration of the project. Duties of the QSP include but are not limited to: • Implementing all elements of the General Permit and SWPPP, including but not limited to: o Ensuring all BMPs are implemented, inspected, and properly maintained o Performing non-stormwater and stormwater visual observations and inspections o Performing non-stormwater and storm sampling and analysis, as required o Performing routine inspections and observations o Implementing non-stormwater management, and materials and waste management activities such as: monitoring discharges; general Site clean-up; vehicle and equipment cleaning, fueling and maintenance; spill control; ensuring that no materials other than stormwater are discharged in quantities which will have an adverse effect on receiving waters or storm drain systems; etc. • The QSP may delegate these inspections and activities to an appropriately trained employee,but shall ensure adequacy and adequate deployment • Ensuring elimination of unauthorized discharges • The QSPs shall be assigned authority by the LRP to mobilize the Contractor's crews in order to make immediate repairs to the control measures • Coordinate with the Contractor(s) to assure all of the necessary corrections/repairs are made immediately and that the project complies with the SWPPP,the General Permit and approved plans at all times • Notifying the LRP immediately of off-site discharges or other non-compliance events The QSP will conduct an initial training session with job-site personnel regarding the implementation of the SWPPP and the daily inspection requirements. The QSP will conduct weekly tailgate meetings to ensure the job-site personnel working under the QSP are kept aware of any site specific concerns, upcoming changes to the construction schedule that could affect the implementation of site BMPs and address any issues of concern. The QSP shall perform additional training as may be needed of job-site personnel as a part of these tailgate meetings. 2026 Pioneer Trail Waterline Project 4 February 13,2026 Training topics will include: • Overview of the SWPPP • Implementation and maintenance requirements for all site temporary BMPs • Good housekeeping measures • Non-storm water management • Procedures for notifying the QSP/QSD if deficiencies are noted and modifications are required • Emergency contact information • Other topics as may be required based on the phase of construction The QSP shall be responsible for completing the training logs shown in Appendix H, which identifies the site-specific stormwater topics covered as well as the names of site personnel who attended the meeting. Tasks may be delegated to trained employees by the QSP provided adequate supervision and oversight is provided. Training shall correspond to the specific task delegated including: SWPPP implementation; BMP inspection and maintenance; and record keeping. Documentation of training activities (formal and informal) shall be retained in SWPPP Appendix H. Copies of applicable training certificates for the QSPs are included in Appendix H. QSP Contact Information Name: Julia Ashton Title: Project Engineer, QSD/QSP Company: Lumos and Associates Address: 312 Dorla Court, Suite 202, Zephyr Cove,NV 89448 Phone Number: 775.588.6490 Number(24/7): 520.977.6021 QSP Alternate Contact Information Name: Ariana Mui Title: Staff Engineer, QSD/QSP Company: Lumos and Associates Address: 3200 Douglas Blvd, Suite 320, Roseville, CA 95661 Phone Number: 279.230.8336 Number(24/7): 707.513.5446 2026 Pioneer Trail Waterline Project 5 February 13,2026 1.5 CONTRACTOR LIST Contractor Name: TBD Title: TBD Company: TBD Address: TBD Phone Number: TBD 1.6 EMERGENCY CONTACT PERSON AND 24-HOUR PHONE NUMBERS Emergency Contact STPUD Wastewater Operations Departmentment Company: South Tahoe Public Utility Disrict Address: 1275 Meadow Crest Drive South Lake Tahoe Public Utility District Phone Number: 530.544.6474 Number(24/7): 530.544.4964 1.7 SWPPP AVAILABILITY AND IMPLEMENTATION The discharger shall make the SWPPP available at the construction site during working hours while construction is occurring and shall be made available upon request by a State or local inspector. When the original SWPPP is retained by a crewmember in a construction vehicle and is not currently at the construction site, current copies of the BMPs and map/drawing will be left with the field crew and the original SWPPP shall be made available via a request by radio/telephone. The SWPPP shall be implemented concurrently with the start of ground disturbing activities. 1.8 SWPPP AMENDMENTS While this SWPPP is designed to meet the objectives listed in Section 1.1,it is also designed to be updated and modified as site conditions and construction methods require. Amendments to this SWPPP are required when: • There are amendments to the Discharge Permit • Additional BMPs are required to be installed at the site due to permit violations,non- compliance or as a result of a storm water discharge • The location of BMP installation varies substantially from what is shown on the plans • There are changes in construction that affect the discharge of pollutants from the construction site 2026 Pioneer Trail Waterline Project 6 February 13,2026 • Site conditions vary from what was anticipated or other unanticipated factors resulting in the original SWPPP not meeting the objective of reducing pollutants in storm water discharges • When deemed necessary by the QSD. The QSD has determined that the changes listed in Table 1.1 can be field determined by the QSP. All other changes shall be made by the QSD as formal amendments to the SWPPP The following items shall be included in each amendment: • Who requested the amendment • The location of proposed change • The reason for change • The original BMP proposed, if any • The new BMP proposed Amendment shall be logged at the front of the SWPPP and certification kept in Appendix C. The SWPPP text shall be revised, and/or hand annotated as necessary to properly convey the amendment. SWPPP amendments must be made by a QSD. The following changes have been designated by the QSD as "to be field determined" and constitute minor changes that the QSP may implement based on field conditions. Table 1.1 List of Changes to be Field Determined Candidate changes for field location or Check changes that can be field located determination by QSP(1) or field determined by QSP Increase quantity of an Erosion or Sediment Control X Measure Relocate/Add stockpiles or stored materials X Relocate or add toilets X Relocate areas for waste storage X Relocate water storage and/or water transfer location X Changes to access points(entrance/exits) Change type of Erosion or Sediment Control Measure X Minor changes to location of erosion or sediment X control based on site conditions Minor changes to schedule or phases X Changes in construction materials (1)Any field changes not identified for field location or field determination by QSP must be approved by QSD 2026 Pioneer Trail Waterline Project 7 February 13,2026 Section 2 Project Information 2.1 PROJECT AND SITE DESCRIPTION 2.1.1 Site Description The site is located along Pioneer Trail in South Lake Tahoe, California, between Susquehanna Drive and Marshall Trail. The corridor consists of an existing public roadway and associated right-of-way. The land adjacent to the roadway is primarily undeveloped forested land and residential properties. The corridor includes a crossing over Trout Creek. The site location is shown on the Site Map in Appendix A. 2.1.2 Existing Conditions The project corridor consists of an existing paved public roadway and associated right-of-way along Pioneer Trail. Existing utilities and roadway improvements are present throughout the corridor, and no permanent structures would be removed. A culvert conveys Trout Creek under Pioneer Trail within the corridor. 2.1.3 Existing Drainage The project corridor follows the existing topography of Pioneer Trail,with roadway slopes that direct road surface flow to roadside swales, curb and gutter, and/or the underground storm drain system. From Susquehanna Drive, the roadway slopes northeast toward Trout Creek with an elevation change of approximately 160 to 165 feet. From Marshall Trail, the roadway slopes southwest toward Trout Creek with an elevation change of approximately 15 to 20 feet. Multiple existing drainage inlets collect roadway runoff from Pioneer Trail at the Trout Creek culvert, conveying collected drainage to an assumed offsite treatment area. Surface runoff outside of Pioneer Trail (beyond curb and gutter, swales and drop inlets), sheet flows away from the road, direction varying depending on roadway section. The corridor is located approximately 3 air miles from Lake Tahoe. Existing drainage patterns are shown on Figure 2. Trout Creek is a Clean Water Act Section 303(d)-listed water body impaired for iron, nitrogen, phosphorous, turbidity and supports cold, spawning, and migratory aquatic uses. Lake Tahoe is a Clean Water Act Section 303(d)-listed water body impaired for phosphorous, nitrogen and sediment and supports cold, spawning, and migratory aquatic uses. 2.1.4 Geology and Groundwater A Custom Soil Resource Report for this corridor of Pioneer Trail was made with the United States Depaltiuent of Agriculture (USDA)Natural Resources Conservation Service (NRCS) Web Soil Survey online portal. The report indicates that the area contains, Ubaj Sandy Loam Chirstopher Gravelly Loamy Course Sand and Loamy Coarse Sand, Jabu Course Sandy Loam, Gefor Gravelly Loamy Coarse Sand, and a small amount of Tahoe Complex. Slopes range from 0 to 30 percent in this area however the construction of this waterline will not be performed in the higher percentage slopes of this range. 2026 Pioneer Trail Waterline Project 8 February 13,2026 The depth of groundwater is unknown, however it is expected that groundwater could be encountered within 5' of the surface in the stream environment zone containing Trout Creek. 2.1.5 Project Description Construction of the 2026 Pioneer Trail Waterline Project will occur within the existing Pioneer Trail roadway, associated public right-of-way and perpendicular roadways. Excavation for the waterline will involve approximately 10,190 linear feet of trenching, within Pioneer Trail, the shoulder of Pioneer Trail, and perpendicular roadways including Golden Bear Trail, Jicarilla Drive and Susquehana Drive. At Trout Creek, the waterline will be installed above the culvert, and no work is proposed within the creek channel. The limits of construction are shown on Figure 2 and Figure 3. Excavated material will be temporarily stockpiled within the roadway right-of-way and used to backfill the trench, with any excess material transported to an approved offsite location. The waterline will be owned and operated by the South Tahoe Public Utility District(STPUD). Construction activities will not be phased. 2.1.6 Developed Condition Post-construction surface drainage along the Pioneer Trail corridor will follow existing patterns, with runoff conveyed as sheet flow along the roadway and into roadside drainage inlets or natural swales. Very minimal new impervious surfaces will be added, and drainage patterns will remain consistent with pre-construction conditions. Post construction drainage patterns are presented on Figure 3. Table 2.1 Construction Site Estimates Construction site area 1.1 acres Percent impervious before construction 52.1 % Runoff coefficient before construction 0.589 Percent impervious after construction 52.4 % Runoff coefficient after construction 0.590 2.2 PERMITS AND GOVERNING DOCUMENTS In addition to the General Permit, the following documents have been taken into account while preparing this SWPPP • Regional Water Board requirements • Basin Plan requirements • Site Improvement Plans dated January 2026 2026 Pioneer Trail Waterline Project 9 February 13,2026 2.3 STORMWATER RUN-ON FROM OFFSITE AREAS Some surface runoff from upslope hillsides may flow onto the roadway corridor; however, these areas are outside the limits of construction, and no work is proposed in these upslope areas. The majority of runoff within the corridor originates from the roadway itself and adjacent roadside areas. 2.4 CONSTRUCTION SCHEDULE Grading activities in the Lake Tahoe Basin are limited to the time period from May 1 to October 15 of each year. STPUD has provided a construction schedule included in Appendix D. The LRP shall contact the QSD if the schedule changes during construction to address potential impact to the SWPPP. Following is the proposed schedule for BMP implementation: Table 2.2 BMP Implementation Schedule BMP Implementation Duration EC-1, Scheduling Prior to Construction Entirety of Project EC-2,Preservation of Existing Vegetation Start of Construction Entirety of Project As needed for inactive areas EC-3,Hydraulic Mulch As needed and for site winterization g 1.1 EC-8,Wood Mulch W 0 EC-15, Soil Roughening During landscaping Post-construction EC-16,Non-Vegetated Stabilization EC-9,Drainage Swales During rough grading Entirety of Project WE-1,Wind Erosion Control SE-1, Silt Fence SE-5,Fiber Rolls w USE-6,Gravel Bag Berm SE-7, Street Sweeping Start of Construction Entirety of Project SE-10, Storm Drain Inlet Protection v) TC-1, Stabilized Construction Entrance/Exit 5 NS-1,Water Conservation ° NS-8,Vehicle and Equipment Cleaning NS-9,Vehicle and Equipment Fueling Start of Construction Entirety of Project Z 6 NS-10,Vehicle and Equipment Maintenance NS-3,Paving and Grinding Operation During AC Paving operations During AC PavingOperations 2026 Pioneer Trail Waterline Project 10 February 13,2026 Table 2.2 BMP Implementation Schedule BMP Implementation Duration NS-12, Concrete Curing During Concrete Paving Through Operations completion of NS-13, Concrete Finishingconcrete curing WM-1,Material Delivery and Storage WM-2,Material Use y et WM-3, Stockpile Management eql cw WM-4, Spill Prevention t WM-5, Solid Waste Management Start of Construction Entirety of Project ct c el WM-6,Hazardous Waste Management WM-8 Concrete Waste Management WM-9, Sanitary Sewer Waste Management 2.5 POTENTIAL CONSTRUCTION ACTIVITY AND POLLUTANT SOURCES The QSP shall complete an assessment of the construction site and determine what potential construction activities and pollutant sources are anticipated to be onsite and if these activities and associated materials will or could potentially contribute pollutants, other than sediment, to storm water runoff. The following is a list of materials or substances anticipated to be onsite. The QSP shall note additional materials used onsite that could potentially contribute pollutants and assure that the contractor employs appropriate strategies regarding the delivery, storage,use and management of these materials to ensure they are protected from coming into contact with storm water runoff. • Waste materials associated with demolition activities • Dust palliative products • Asphalt paving materials and waste material from paving operations • Concrete materials and waste material • Concrete curing compounds • Paint and paint cleaning supplies • Landscaping materials and fertilizer material • Base, subbase and other stockpiled fill material • Cleaning products • Materials and waste products associated with building activities including wood, sawdust, treated wood products, metals, VOCs, mineral spirits, sealers, stucco, mortar, etc.; • Waterline flushing products (chlorinated water) • Vehicle and equipment fluids such a fuel, oil, lubricants, coolants, antifreeze, solvents, discharges from batteries, and grease 2026 Pioneer Trail Waterline Project 11 February 13,2026 • Portable toilet waste • General litter Construction activities that have the potential to general pollutants in storm water discharges include concrete pours, concrete curing, concrete waste management areas, material mixing areas (such as mortar, stucco or soil amendment mixing), and general waste management. These areas should be monitored and sampled for high pH if during storm events. The following table includes a list of the various construction activities that could result in pollutants coming into contact with storm water. Table 2.3 Construction Phases and Activities Construction Phase Construction Activity Demolition Demolition of trees, and smaller vegetation Grading and Site Work Soil import/export Material stockpiling Utility trenching Asphalt Paving and Concrete Sawcutting of exiting AC Work Asphalt paving Asphalt sealing Concrete curing and finishing Pavement striping Equipment Use Vehicle and equipment fueling and maintenance Vehicle and equipment repair Waste Management Solid waste management for litter, construction debris, and trash Liquid waste management for wash water Sanitary septic waste management for portable toilets 2.6 IDENTIFICATION OF NON-STORMWATER DISCHARGES Non-stormwater discharges consist of discharges which do not originate from precipitation events. The General Permit provides allowances for specified non-stormwater discharges that do not cause erosion or carry other pollutants. Non-stormwater discharges into storm drainage systems or waterways, which are not authorized under the General Permit and listed in the SWPPP, or authorized under a separate NPDES permit, are prohibited. Non-stormwater discharges that are authorized from this project site include the following: 2026 Pioneer Trail Waterline Project 12 February 13,2026 • Irrigation of vegetation • Pipe flushing and testing • Construction dewatering These discharges are authorized under the following conditions: • The discharge does not violate any other provision of the General Permit • The discharge is not prohibited by the Basin Plan or a prohibition exemption from the Lahontan Regional Board has been granted in writing • Specific BMPs have been implemented to prevent or reduce the contact of non- storm water discharge with construction material or equipment. For construction dewatering, a detailed dewatering and monitoring plan that meets the conditions for Exempted Low Threat Discharges prior to the start of dewatering activities must have been provided to the Lahontan Regional Board for review and comment • The discharge does not contain toxic constituents in toxic amounts These authorized non-storm water discharges will be managed with the storm water and non- storm water BMPs described in Section 3 of this SWPPP and will be minimized by the QSP. Steps will be taken, including the implementation of appropriate BMPs, to ensure that unauthorized discharges are eliminated, controlled, disposed, or treated on-site. 2.7 REQUIRED SITE MAP INFORMATION The construction project's Site Maps showing the project location, surface water boundaries, geographic features, construction site perimeter and general topography and other requirements is located in Appendix A. 2026 Pioneer Trail Waterline Project 13 February 13,2026 Section 3 Best Management Practices 3.1 SITE MANAGEMENT This SWPPP is designed ensure the project site is managed in a manner that mitigates the potential for storm water run on or runoff to become contaminated with pollutants and leave the site. The SWPPP is designed to ensure the General Permit requirement of providing site BMPs that are effective and result in the reduction or elimination of sediment related pollutants in storm water discharges and authorized non-storm water discharges from construction activity are implemented accordingly and per the site-specific project conditions. The goals of the SWPPP is to implement and maintain an effective combination of site specific BMPs. The following approach to implementation of the site specific BMPs shall be followed to the extent practicable: • Minimize the amount of disturbed area onsite at any one time • Adjust construction activities to minimize exposure of pollutants during anticipated rain events • Retain and protect existing vegetation to the extent practicable • Implement good housekeeping measures to minimize the potential contact of building materials and supplies with storm water runoff • Inspect and maintain BMPs as required Following are specific erosion and sediment control, tracking control, and good housekeeping BMPs to be implemented. 3.2 EROSION AND SEDIMENT CONTROL Erosion and sediment controls are required by the General Permit to provide effective reduction or elimination of sediment related pollutants in storm water discharges and authorized non-storm water discharges from the Site. The Contractor shall control erosion and the movement of sediment from the site through the implementation of specific erosion and sediment control BMPs as described below. Included in this SWPPP is a schedule for implementation of site specific BMPs. The Contractor may need additional erosion and sediment control measures to be implemented based on the actual construction activities. Effective cover shall be provided for any inactive construction areas (areas where work will ceased for a period of 14 days or more and is not anticipated to begin again within 21 days). The Contractor shall coordinate with the QSP for the identification of additional erosion and sediment control measures required or the temporary stabilization of inactive construction areas throughout the project durations. Applicable BMPs are identified in this section for erosion control, sediment control, tracking control, and wind erosion control. 2026 Pioneer Trail Waterline Project 14 February 13,2026 3.2.1 Erosion Control Erosion control, also referred to as soil stabilization, consists of source control measures that are designed to prevent soil particles from detaching and becoming transported in storm water runoff. Erosion control BMPs protect the soil surface by covering and/or binding soil particles. This construction project will implement the following practices to provide effective temporary and final erosion control during construction: • Preserve existing vegetation where required and when feasible • The area of soil disturbing operations shall be controlled such that the Contractor is able to implement erosion control BMPs quickly and effectively • Stabilize non-active areas within 14 days of cessation of construction activities or sooner if stipulated by local requirements • Control erosion in concentrated flow paths by applying erosion control blankets, check dams, erosion control seeding or alternate methods • Prior to the completion of construction, apply permanent erosion control to remaining disturbed soil areas Sufficient erosion control materials shall be maintained onsite to allow implementation in conformance with this SWPPP. The following temporary erosion control BMP selection table indicates the BMPs that shall be implemented to control erosion on the construction site. Fact Sheets for temporary erosion control BMPs are provided in Appendix E. 2026 Pioneer Trail Waterline Project 15 February 13,2026 Table 3.1 Temporary Erosion Control BMPs CASQA Meets a BMP Used Fact BMP Name Minimum If not used, state reason Sheet Requirement(1) YES NO EC-1 Scheduling ✓ X EC-2 Preservation of Existing ✓ X Vegetation EC-3 Hydraulic Mulch ✓ X EC-4 Hydroseed ✓ X See Alternate BMP Used EC-5 Soil Binders X N/A EC-6 Straw Mulch X N/A EC-7 Geotextiles and Mats X N/A EC-8 Wood Mulching ✓ X N/A EC-9 Earth Dike and Drainage Swales X N/A EC-10 Velocity Dissipation Devices X N/A EC-11 Slope Drains X N/A EC-12 Stream Bank Stabilization X N/A EC-14 Compost Blankets X N/A EC-15 Soil Preparation-Roughening X EC-16 Non-Vegetated Stabilization X WE-1 Wind Erosion Control ✓ X Alternate BMPs Used: If used,state reason: Revegetate per TRPA specifications Aligns with local agency requirements (1)Applicability to a specific project shall be determined by the QSD. 2026 Pioneer Trail Waterline Project 16 February 13,2026 These temporary erosion control BMPs shall be implemented in conformance with the following guidelines and as outlined in the BMP Factsheets provided in Appendix E. If there is a conflict between documents, the Site Map will prevail over narrative in the body of the SWPPP or guidance in the BMP Fact Sheets. Site specific details in the Site Map prevail over standard details included in the Site Map. The narrative in the body of the SWPPP prevails over guidance in the BMP Fact Sheets. Scheduling The project is located in the Lake Tahoe Basin and grading activities are limited to the time period between May 1 and October 15. The project soil disturbing activities are scheduled to be conducted within this timeframe. The site shall be winterized for the time period of October 16 through April 30 unless a waiver has been granted by TRPA and the Regional Water Board. During this time period, the site shall be able to be winterized within 24-hours of an anticipated storm event. Winterization measures shall include the temporary stabilization of all disturbed areas through the placement of a hydraulic mulch or wood/pine needle mulch,placement of fiber rolls or silt fence down gradient of all disturbed areas, covering of and the placement of fiber rolls around the perimeter of material stockpiles, and other measures as may be required based on the phase of construction to ensure the site is stable and storm water discharge is prevented from leaving the site. Appendix D includes the 2026 Pioneer Trail Waterline Project Construction Schedule. Preservation of Existing Vegetation The limits of disturbance for the project will be clearly delineated through the use of boundary fencing. Trees within the project area to remain will be protected through the use of tree protection fencing. Hydraulic Mulch For all disturbed areas that will remain inactive for more than 14 days, a wood fiber mulch and tackifer shall be applied. The application rate shall be as specified by the manufacturer. Wood Mulching Wood chips or pine needle mulch shall be applied to re-seeded or disturbed areas. Wind Erosion Control Paved surfaces within the project area shall be swept as needed if sediment is visible or at least once per week to minimize the potential for any accumulated sediment to become air-borne. All inactive materials stockpiles will be covered with plastic to prevent wind erosion. Revegetate Disturbed areas not receiving rock stabilization or other permanent stabilization means shall be re-seeded with a native seed mix as approved by the Tahoe Regional Planning Agency. Areas shall be drill seeded and hand broadcast and raked into amended hums topsoil. 3.2.2 Sediment Controls Sediment controls are temporary or permanent structural measures that are intended to complement the selected erosion control measures and reduce sediment discharges from active 2026 Pioneer Trail Waterline Project 17 February 13,2026 construction areas. Sediment controls are designed to intercept and settle out soil particles that have been detached and transported by the force of water. The following sediment control BMP selection table indicates the BMPs that shall be implemented to control sediment on the construction site. Fact Sheets for temporary sediment control BMPs are provided in Appendix E. 2026 Pioneer Trail Waterline Project 18 February 13,2026 Table 3.2 Temporary Sediment Control BMPs CASQA Meets a BMP used Fact BMP Name Minimum If not used,state reason Sheet Requirement') YES NO SE-1 Silt Fence ✓ X SE-2 Sediment Basin X N/A SE-3 Sediment Trap X N/A SE-4 Check Dams X N/A SE-5 Fiber Rolls/Coir Logs ✓ X SE-6 Gravel Bag Berm ✓ X SE-7 Street Sweeping ✓ X SE-8 Sandbag Barrier X N/A SE-9 Straw Bale Barrier X N/A SE-10 Storm Drain Inlet Protection ✓ X SE-11 Active Treatment Systems X N/A SE-12 Manufactured Linear Sediment Controls X N/A SE-13 Compost Sock and Berm X N/A SE-14 Biofilter Bags X N/A TC-1 Stabilized Construction Entrance and Exit ✓ X TC-2 Stabilized Construction Roadway X N/A TC-3 Entrance Outlet Tire Wash X N/A Alternate BMPs Used: if used,state reason: (1)Applicability to a specific project shall be determined by the QSD 2026 Pioneer Trail Waterline Project 19 February 13,2026 These temporary sediment control BMPs shall be implemented in conformance with the following guidelines and in accordance with the BMP Fact Sheets provided in Appendix E. If there is a conflict between documents, the Site Map will prevail over narrative in the body of the SWPPP or guidance in the BMP Fact Sheets. Site specific details in the Site Map prevail over standard details included in the Site Map. The narrative in the body of the SWPPP prevails over guidance in the BMP Fact Sheets. Silt Fence Silt fencing is proposed to use within the area of Trout Creek and at the Boneyard Staging Area. Fiber Rolls/Coir Logs Fiber rolls are proposed as the primary erosion control for the waterline trench and staging areas. They are also to be stockpiled onsite to implement as needed if storm events are anticipated and additional sediment controls are required. Gravel Bag Berm Gravel bag barriers will be used for storm drain inlet protection or employed in the event run on or runoff occurs in areas where flow is not anticipated. Gravel bags will be used to direct runoff to stable areas. Street Sweeping Street sweeping shall be employed to ensure any material in the public street is cleaned up to prevent the movement of sediment into the downstream storm drain system. Storm Drain Inlet Protection Storm drain inlet protection will be implemented at existing drop inlets located within or immediately downstream of active construction areas. Gravel bags are intended to be used as sediment barriers, however other sediment barriers may be used if approved by QSP (such as fiber rolls, filter fabric, or manufactured inlet protection devices). They will be installed within or around drop inlets as needed during trenching, saw cutting,paving, and other activities that may generate sediment. Stabilized Construction Entrance and Exit A stabilized construction entrance/exit shall be constructed at this location to minimize the tracking of sediment onto the adjacent street at Boneyard Staging Area. The construction vehicles will mainly be on the Pioneer Trail roadway. The roadside staging areas do not allow for a stabilized construction entrance, therefore street sweeping will be performed diligently in those areas as an alternative. 3.3 NON-STORMWATER CONTROLS AND WASTE AND MATERIALS MANAGEMENT 3.3.1 Non-Stormwater Controls Non-stormwater discharges into storm drainage systems or waterways, which are not authorized under the General Permit, are prohibited. Non-stormwater discharges for which a separate NPDES permit is required by the local Regional Water Board are prohibited unless coverage under the separate NPDES permit has been obtained for the discharge. The selection of non- 2026 Pioneer Trail Waterline Project 20 February 13,2026 stormwater BMPs is based on the list of construction activities with a potential for non- stormwater discharges identified in Section 2.6 of this SWPPP. The following non-stormwater control BMP selection table indicates the BMPs that shall be implemented to control sediment on the construction site. Fact Sheets for temporary non- stormwater control BMPs are provided in Appendix E. 2026 Pioneer Trail Waterline Project 21 February 13,2026 Table 3.3 Temporary Non-Storm Water BMPs Meets a BMP used CASQA Fact BMP Name Minimum If not used,state reason Sheet Requirementw YES NO NS-1 Water Conservation Practices ✓ X NS-2 Dewatering Operation ✓ X NS-3 Paving and Grinding Operation ✓ X NS-4 Temporary Stream Crossing X N/A NS-5 Clear Water Diversion X N/A NS-6 Illicit Connection/Discharge ✓ X NS-7 Potable Water/Irrigation X N/A NS-8 Vehicle and Equipment Cleaning ✓ X NS-9 Vehicle and Equipment Fueling ✓ X NS-10 Vehicle and Equipment Maintenance ✓ X NS-11 Pile Driving Operation X N/A NS-12 Concrete Curing ✓ X NS-13 Concrete Finishing ✓ X NS-14 Material and Equipment Use Over Water X N/A NS-15 Demolition Removal Adjacent to Water X N/A NS-16 Temporary Batch Plants X N/A Alternate BMPs Used: If used,state reason: (1)Applicability to a specific project shall be determined by the QSD 2026 Pioneer Trail Waterline Project 22 February 13,2026 Non-stormwater BMPs shall be implemented in conformance with the following guidelines and in accordance with the BMP Fact Sheets provided in Appendix E. If there is a conflict between documents, the Site Map will prevail over narrative in the body of the SWPPP or guidance in the BMP Fact Sheets. Site specific details in the Site Map prevail over standard details included in the Site Map. The narrative in the body of the SWPPP prevails over guidance in the BMP Fact Sheets. Water Conservation Practices Water use for construction operations will be minimized to prevent runoff and erosion. When water is used for dust suppression, the construction area will be monitored to ensure no rilling or erosion results from the water application. Dewatering Operations Dewatering is anticipated,but not certain within SEZ zone of the construction site. If groundwater or accumulated water is encountered during trenching activities, dewatering may be required. Any dewatering discharge will be managed to prevent erosion and the transport of sediment. Discharged water will be filtered or otherwise treated as necessary prior to release and will not be allowed to flow directly into storm drain inlets, roadside drainage features, or Trout Creek. Dewatering discharges, if required, will be directed to stable, non-erodible areas or contained and disposed of offsite as appropriate. Paving and Grinding Operation All existing inlets will be protected through the placement of sediment barriers inside the drop inlets during the paving operations. Upon completion of the paving operations, all paved areas will be swept prior to the removal of the sediment barriers. Slurry from any saw cutting will be contained through the use of fiber rolls or gravel bag barriers to prevent slurry and sediment laden water from being transported off site or into the existing drop inlets. Illicit Connection/Discharge It is not anticipated that any illicit connections or discharges will occur during construction. If any unauthorized non-stormwater discharges are observed, they will be immediately corrected and reported as required to prevent sediment or pollutants from entering the storm drain system, roadside drainage features, or Trout Creek. Vehicle and Equipment Cleaning It is not anticipated that any vehicle or equipment cleaning will occur within the project limits. If it becomes required for an unanticipated reason, the contractor shall ensure all resulting waste and water is fully contained and appropriately disposed of offsite. Vehicle and Equipment Fueling No vehicle or equipment fueling station is anticipated for this site. Vehicle and equipment fueling will be limited to fueling of equipment that is not readily moved to an offsite fueling location. Adequate spill protection measures shall be employed to ensure any potential fuel spills are readily cleaned up. Vehicle and Equipment Maintenance It is not anticipated that any vehicle or equipment maintenance will occur within the project limits. Vehicle and equipment maintenance shall only occur when it is impractical to move the vehicle or equipment offsite to complete the required maintenance. If vehicle or equipment maintenance must occur onsite, care shall be taken to employ adequate spill protection measures 2026 Pioneer Trail Waterline Project 23 February 13,2026 to ensure any potential oils, grease, fuel, solvents or other cleaning materials are readily cleaned up. Concrete Curing All existing inlets will be protected through the placement of sediment barriers inside the drop inlets during the placement of concrete adjacent to the drop inlets. Drop inlets and adjacent drainages shall be protected prior to the application of any concrete curing compounds. Water from any cleaning operations shall be properly disposed of and not allowed to drain off site or into the existing drop inlets. Concrete Finishing All existing inlets will be protected through the placement of sediment barriers inside the drop inlets during the finishing of concrete adjacent to the drop inlets. Drop inlets and adjacent drainages shall be protected until all newly placed concrete is finished and areas are swept to remove any construction debris. Water from any cleaning operations shall be properly disposed of and not allowed to drain off site or into the existing drop inlets. 3.3.2 Materials Management and Waste Management Materials management control practices consist of implementing procedural and structural BMPs for handling, storing and using construction materials to prevent the release of those materials into stormwater discharges. The amount and type of construction materials to be utilized at the Site will depend upon the type of construction and the length of the construction period. The materials may be used continuously, such as fuel for vehicles and equipment, or the materials may be used for a discrete period, such as soil binders for temporary stabilization. Waste management consist of implementing procedural and structural BMPs for handling, storing and ensuring proper disposal of wastes to prevent the release of those wastes into stormwater discharges. Materials and waste management pollution control BMPs shall be implemented to minimize stormwater contact with construction materials,wastes and service areas; and to prevent materials and wastes from being discharged off-site. The primary mechanisms for stormwater contact that shall be addressed include: • Direct contact with precipitation • Contact with stormwater run-on and runoff • Wind dispersion of loose materials • Direct discharge to the storm drain system through spills or dumping • Extended contact with some materials and wastes, such as asphalt cold mix and treated wood products, which can leach pollutants into stormwater. A list of construction activities is provided in Section 2.5. The following Materials and Waste Management BMP selection table indicates the BMPs that shall be implemented to handle materials and control construction site wastes associated with these construction activities. Fact Sheets for Materials and Waste Management BMPs are provided in Appendix E. 2026 Pioneer Trail Waterline Project 24 February 13,2026 Table 3.4 Temporary Materials Management BMPs CASQA Fact Meets a BMP used Sheet BMP Name Minimum If not used,state reason Requirement') YES NO WM-01 Material Delivery and Storage ✓ X WM-02 Material Use ✓ X WM-03 Stockpile Management ✓ X WM-04 Spill Prevention and Control ✓ X WM-05 Solid Waste Management ✓ X WM-06 Hazardous Waste Management ✓ X WM-07 Contaminated Soil Management X No known contaminated soil onsite WM-08 Concrete Waste Management ✓ X WM-09 Sanitary-Septic Waste ✓ X Management WM-10 Liquid Waste Management X N/A Alternate BMPs Used: If used,state reason: (1)Applicability to a specific project shall be determined by the QSD. 2026 Pioneer Trail Waterline Project 25 February 13,2026 Material management BMPs shall be implemented in conformance with the following guidelines and in accordance with the BMP Fact Sheets provided in Appendix E. If there is a conflict between documents, the Site Map will prevail over narrative in the body of the SWPPP or guidance in the BMP Fact Sheets. Site specific details in the Site Map prevail over standard details included in the Site Map. The narrative in the body of the SWPPP prevails over guidance in the BMP Fact Sheets. Material Delivery and Storage All materials shall be appropriately stored onsite away from drainages to minimize the potential for storm water to come into contact with the material. Materials that have the potential to pollute storm water shall be stored in watertight containers with secondary containment required for all chemicals. Material Use Materials shall be used according to the manufacturer's recommendations. The contractor shall minimize the use of hazardous materials to the extent practicable. Materials shall not be allowed to be disposed of in a manner that will allow the material to enter the storm drain system or drainage channels. Care shall be taken to not apply fertilizers or other materials immediately prior to a rain event which could lead to pollutants being transported to the adjacent drainage channels or offsite. Stockpile Management All material stockpiles shall be managed to minimize the potential for the movement of sediment from either wind or water erosion. All stockpiles shall be covered and have appropriate temporary perimeter sediment barriers when not actively in use. Spill Prevention and Control The Contractor shall train employees on the potential dangers of material and chemical spills to people and the environment and on proper spill cleanup protocols. The Contractor shall ensure materials are appropriately stored onsite to minimize the potential for any spills to occur. Adequate spill control and containment/cleanup kits shall be onsite at all times. Solid Waste Management Care shall be taken to maintain a clean worksite at all times. Storage/containment facilities shall be provided onsite to minimize the potential for storm water to come into contact with construction debris and waste materials. Construction debris and litter shall be cleaned up daily and placed in designated trash containers or waste collection areas. Trash should be removed from the site regularly. Hazardous Waste Management All hazardous waste shall be stored in sealed containers until they can be appropriately disposed of offsite. Temporary facilities for storing hazardous waste shall meet all applicable state and federal regulations. 2026 Pioneer Trail Waterline Project 26 February 13,2026 Concrete Waste Management Washout of concrete trucks or concrete equipment shall only be allowed within a designed concrete washout area that has appropriate BMPs to prevent the discharge of concrete wash material. Concrete pours shall not be conducted immediately prior to an anticipated rain event. Sanitary-Septic Waste Management Temporary sanitary facilities shall be located away from drainages and shall be secured to prevent overturning. All temporary sanitary facilities must be equipped with containment to prevent the discharge of pollutants. 3.4 POST CONSTRUCTION STORMWATER MANAGEMENT MEASURES Post construction BMPs are permanent measures installed during construction, designed to reduce or eliminate pollutant discharges from the site after construction is completed. As a condition of the TRPA permit granted for this project, the project permittee is required to maintain all permanent BMPs in perpetuity to ensure effectiveness. Project permenant BMPs include the stablization of bare soil areas through the placement of wood/pine needle mulch or re-seeding in landscaped areas. 2026 Pioneer Trail Waterline Project 27 February 13,2026 Section 4 BMP Inspection, Maintenance, and Rain Event Action Plans 4.1 BMP INSPECTION AND MAINTENANCE The General Permit requires daily inspections of BMPs, along with inspections before, during, and after qualifying rain events. Visual inspections shall be performed by the project QSP or by an appropriately trained staff acting under the QSP's direction. A BMP inspection checklist must be filled out for inspections and maintained on-site with the SWPPP. A blank inspection checklist can be found in Appendix F. Completed checklists shall be kept in CSMP Attachment 2 "Monitoring Records". BMPs shall be maintained regularly to ensure proper and effective functionality. If necessary, corrective actions shall be implemented within 72 hours of identified deficiencies and associated amendments to the SWPPP shall be prepared by the QSD. Specific details for maintenance, inspection, and repair of Construction Site BMPs can be found in the BMP Factsheets in Appendix E. 4.2 RAIN EVENT ACTION PLANS The Rain Event Action Plans (REAP) is written document designed to be used as a planning tool by the QSP to protect exposed portions of project sites and to ensure that the discharger has adequate materials, staff, and time to implement erosion and sediment control measures. These measures are intended to reduce the amount of sediment and other pollutants that could be generated during the rain event. It is the responsibility of the QSP to be aware of precipitation forecast and to obtain and print copies of forecasted precipitation from NOAA's National Weather Service Forecast Office. The SWPPP includes a REAP template (Appendix G)but the QSP shall customize each REAP based on the anticipated rain event and the phase of construction currently underway. The QSP shall maintain a paper copy of completed REAPs in compliance with the record retention requirements Section 6.1 of this SWPPP. Completed REAPs shall be maintained in Appendix G. The QSP will develop an event specific REAP no later than 24 hours in advance of a precipitation event forecast to have a 30% or greater chance of producing precipitation in the project area. During periods of unsettled weather when precipitation is anticipated, the weather conditions may need to be monitored throughout the day. The contractor will be required to implement the REAP when the chance of precipitation becomes 30% or greater or when actual site observations indicate imminent rainfall. At minimum the REAP will include the following information: 1. QSP name and contact information 2. Contractor 24-hour contact name and information 3. Site Address 4. A description of current construction activities and BMPs implemented onsite 2026 Pioneer Trail Waterline Project 28 February 13,2026 5. Specific items to review onsite with the contractor and any actions to be performed onsite prior to the rain event 6. Certification by the QSP that the REAP will be carried out as required by the General Permit 7. A printout of the weather forecast 2026 Pioneer Trail Waterline Project 29 February 13,2026 Section 5 Construction Site Monitoring Program 5.1 Purpose This Construction Site Monitoring Program was developed to address the following objectives: 1. To demonstrate that the site is in compliance with the Discharge Prohibitions of the Construction General Permit; 2. To determine whether non-visible pollutants are present at the construction site and are causing or contributing to exceedances of water quality objectives; 3. To determine whether immediate corrective actions, additional Best Management Practices (BMP) implementation, or SWPPP revisions are necessary to reduce pollutants in storm water discharges and authorized non-storm water discharges; 4. To determine whether BMPs included in the SWPPP and REAP are effective in preventing or reducing pollutants in storm water discharges and authorized non-storm water discharges. 5.2 Weather and Rain Event Tracking Visual monitoring, inspections, and sampling requirements of the General Permit are triggered by a qualifying rain event. When the weather forecast for precipitation is a 30% or greater chance for 0.1 inch or more of precipitation for any 24-hour period, the QSP shall perform a pre- storm event site inspection and prepare a REAP. The QSP shall ensure the site is prepared for the forecast precipitation event and shall direct the Contractor to employ any additional site BMPs as may be appropriate based on the phase of construction. 5.2.1 Weather Tracking The QSP shall daily consult the National Oceanographic and Atmospheric Administration (NOAA) for the weather forecasts. These forecasts can be obtained at http://www.forecast.weather.gov. Weather reports should be printed and maintained with the SWPPP in CSMP Attachment 1 "Weather Reports". 5.2.2 Rain Gauges The QSP shall install a rain gauge at the project site. The rain gauge shall be located in an open area away from obstructions such as trees or overhangs. The rain gauge shall be mounted on a post at a height of 3 to 5 feet with the gauge extending several inches beyond the post. The top of the gauge shall be level. The post shall be located away from any area where rainwater can indirectly splash from sheds, equipment, trailers, etc. The rain gauge shall be read daily during normal site scheduled hours. The rain gauge should be read at approximately the same time every day and the date and time of each reading recorded. Log rain gauge readings in CSMP Attachment 1 "Weather Records". Follow the rain gauge instructions to obtain accurate measurements. Once the rain gauge reading has been recorded, accumulated rain shall be emptied and the gauge reset. 2026 Pioneer Trail Waterline Project 30 February 13,2026 5.3 Monitoring Locations The project has 14 storm water discharge monitoring location(shown on the Site Maps in Appendix A). Due to the linear nature of this project site, only certain monitoring locations will be located within the construction area. Only locations within the construction area vicinity will be monitored and sampled if necessary. Monitoring and sampling locations for non-visible pollutants will depend on the storage, occurrence or use of potential pollutants and will vary during the phases of construction. The QSP may have to revise and or add sampling locations during the course of the project if runoff is identified or if unanticipated run-off discharge locations are identified. Non-storm water monitoring locations will include any location within the project site where non-storm water discharges occur. Whenever changes in the construction site might affect the appropriateness of sampling locations, the sampling locations shall be revised accordingly. All such revisions shall be implemented as soon as feasible and the SWPPP amended. Temporary changes that result in a one-time additional sampling location do not require a SWPPP amendment. 5.4 Safety and Monitoring Exemptions Safety practices for sample collection will be in accordance with the contractor's health and safety plan and the Lumos and Associates Safety and Health Program, latest revision. A summary of the safety requirements that apply to sampling personnel is provided below. This project is not required to collect samples or conduct visual observations (inspections)under the following conditions: • During dangerous weather conditions such as flooding and electrical storms. • Outside of scheduled site business hours—Monday through Friday, 7:00 a.m. —6:00 p.m. If monitoring (visual monitoring or sample collection) of the site is unsafe because of the dangerous conditions noted above then the QSP shall document the conditions for why an exception to performing the monitoring was necessary. The exemption documentation shall be filed in CSMP Attachment 2 "Monitoring Records". 5.5 Visual Monitoring Visual monitoring includes observations and inspections. Inspections of BMPs are required to identify and record BMPs that need maintenance to operate effectively, that have failed, or that could fail to operate as intended. Visual observations of the site are required to observe storm water drainage areas to identify any spills, leaks, or uncontrolled pollutant sources. Table 5.1 identifies the required frequency of visual observations and inspections. Inspections and observations will be conducted at the locations identified in Section 5.5.3. 2026 Pioneer Trail Waterline Project 31 February 13,2026 Table 5.1 Summary of Visual Monitoring and Inspections Type of Inspection Frequency Routine Inspections (non-storm event) BMP Inspections Each working day BMP Inspections—Tracking Control Each working day Non-Stormwater Discharge Observations Each working day Rain Event Triggered Inspections Site Inspections Prior to a Qualifying Event Within 24 hours of a qualifying event 1 BMP Inspections During an Extended Storm Event Every 24-hour period of a rain event2 Site Inspections Following a Qualifying Event Within 48 hours of a qualifying event' 1 Inspections are required during scheduled site operating hours. 2 Inspections are required during scheduled site operating hours regardless of the amount of precipitation on any given day. 5.5.1 Routine Observations and Inspections Routine site inspections (non-storm event) and visual monitoring are necessary to ensure that the project is in compliance with the requirements of the Construction General Permit. 5.5.1.1 Routine BMP Inspections Inspections of BMPs are conducted to identify and record: • BMPs that are properly installed; • BMPs that need maintenance to operate effectively; • BMPs that have failed; or • BMPs that could fail to operate as intended. 5.5.1.2 Non-Stormwater Discharge Observations The project area will be inspected for the presence of or indications of unauthorized and authorized non-stormwater discharges. Inspections will record: • Presence or evidence of any non-stormwater discharge (authorized or unauthorized); • Pollutant characteristics (floating and suspended material, sheen, discoloration, turbidity, odor, etc.); and • Source of discharge. 5.5.2 Rain-Event Triggered Observations and Inspections Visual observations of the site and inspections of BMPs are required prior to a qualifying rain event; following a qualifying rain event, and every 24-hour period during a qualifying rain event. Pre-rain inspections will be conducted after consulting NOAA and determining that a 2026 Pioneer Trail Waterline Project 32 February 13,2026 precipitation event with a 30% or greater probability of more than 0.1 inches of precipitation has been predicted. 5.5.2.1 Visual Observations Prior to a Forecasted Qualifying Rain Event Within 24-hours prior to a qualifying event a storm water visual monitoring site inspection will include observations of the following locations: • Storm water drainage areas to identify any spills, leaks, or uncontrolled pollutant sources; • BMPs to identify if they have been properly implemented; • Any storm water storage and containment areas to detect leaks and ensure maintenance of adequate freeboard. 5.5.2.2 BMP Inspections During an Extended Storm Event During an extended rain event BMP inspections will be conducted to identify and record: • BMPs that are properly installed; • BMPs that need maintenance to operate effectively; • BMPs that have failed; or • BMPs that could fail to operate as intended. If the construction site is not accessible during the rain event, the visual inspections shall be performed at all relevant outfalls, discharge points, or accessible downstream locations. The inspections should record any projected maintenance activities. 5.5.2.3 Visual Observations Following a Qualifying Rain Event Within 48 hours following a qualifying rain event (0.1 inches of rain) a storm water visual monitoring site inspection is required to observe: • Storm water drainage areas to identify any spills, leaks, or uncontrolled pollutant sources; • BMPs to identify if they have been properly designed, implemented, and effective; • Need for additional BMPs; • Any storm water storage and containment areas to detect leaks and ensure maintenance of adequate freeboard; and • Discharge of stored or contained rain water. 5.5.3 Visual Monitoring Procedures Visual monitoring shall be conducted by the QSP or staff trained by and under the supervision of the QSP. The name(s) and contact number(s) of the site visual monitoring personnel are listed below and their training qualifications are provided in Appendix H. Assigned inspector: Julia Ashton Contact phone: 775.235.5185 Alternate inspector: Ariana Mui Contact phone: 279.230.8336 Alternate inspector: Mary McDaniel Contact phone: 775.827.6111 Storm water observations shall be documented on the Visual Inspection Field Log Sheet(see CSMP Attachment 3 "Example Forms"). BMP inspections shall be documented on the site- 2026 Pioneer Trail Waterline Project 33 February 13,2026 specific BMP inspection checklist. Any photographs used to document observations will be referenced on a storm water site inspection report and maintained with the Monitoring Records in Attachment 2. 5.5.4 Visual Monitoring Follow-Up and Reporting Correction of deficiencies identified by the observations or inspections, including required repairs or maintenance of BMPs, shall be initiated and completed as soon as possible. If identified deficiencies require design changes, including additional BMPs, the implementation of changes will be initiated within 72 hours of identification and be completed as soon as possible. When design changes to BMPs are required, the SWPPP shall be amended to reflect the changes. Deficiencies identified in site inspection reports and correction of deficiencies will be tracked on the Inspection Field Log Sheet or BMP Inspection Report and shall be submitted to the QSP and shall be kept in CSMP Attachment 2 "Monitoring Records". The QSP shall within seven days of the inspection file copies of the completed Inspection Field Log Sheet or BMP Inspection Report in the onsite SWPPP. Results of visual monitoring must be summarized and reported in the Annual Report. 5.5.5 Visual Monitoring Locations The inspections and observations identified in Sections 5.6.1 and 5.6.2 will be conducted at the locations identified in this section. BMP locations are shown on the Site Maps in SWPPP Appendix A. There is one discharge location on the project site. The site storm water discharge location is shown on the Site Map in Appendix A. 5.6 Water Quality Sampling and Analysis 5.6.1 Sampling and Analysis Plan This Sampling and Analysis Plan describes the sampling and analysis strategy and schedule for monitoring discharges from the project site. The scope of project monitoring and sampling will include: • Monitoring for non-visible pollutants • Monitoring for non-storm water discharges • Sampling of storm water for pH and turbidity • Additional monitoring as may be required by the Regional Water Board To ensure the Sampling and Analysis Plan is effective,the following activities shall be implemented: • Qualified and trained sampling personnel shall be assigned to the project • Adequate monitoring supplies shall be prepared prior to any anticipated storm events • All field instruments shall be calibrated and in good working condition 2026 Pioneer Trail Waterline Project 34 February 13,2026 • A qualified testing laboratory shall be identified Samples shall be collected and field analysis completed by the QSP or other trained and qualified personnel as directed by the QSP. Qualifications for sampling personnel shall be kept in Appendix H. Adequate monitoring supplies shall be readily available prior to an anticipated storm event. Monitoring supplies shall be properly stored and kept away from rain or direct sunlight. Monitoring supplies will include, but are not limited to, sample collection equipment, an appropriate number and volume of sample bottles, identification labels, coolers and ice, surgical gloves, re-sealable storage bags,paper towels, and the CEM-2050 Sample Information, Identification and Chain of Custody Forms. The QSP will maintain all field testing instruments for analyzing samples in the field. The following field equipment will be used: • pH Meter(paper testing strips are not acceptable) • Turbidity Meter Samples that require laboratory testing shall be tested by a laboratory certified by the State Department of Health Services. Samples collected will be analyzed by: South Tahoe Public Utility District 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 530.549.6231 5.6.2 Sampling for pH and Turbidity Sampling and analysis of runoff for pH and turbidity is required for this project. From May 1 through October 15, storm water runoff samples shall be collected for turbidity from each day of a qualifying rain event that results in a discharge from the project site. At minimum, turbidity samples will be collected from each site discharge location draining a disturbed area. A minimum of three samples will be collected per day of discharge during a qualifying event. Samples should be representative of the total discharge from the project each day of discharge during the qualifying event. Typically representative samples will be spaced in time throughout the daily discharge event. Storm water runoff samples shall be collected for pH from each day of qualifying rain events that result in a discharge from the project site. Note that pH samples are only required to be collected during project phases and from drainage areas with a high risk of pH altering discharge. The pH of the effluent samples should not fall outside of the range of 6.0 to 9.0. This range is set at the numeric action level (NAL). If the effluent falls outside of this range,the QSP must investigate the cause of this and implement appropriate measures to correct the issue. If the pH is determined to be due from natural causes, data such as water quality results from run-on storm water must be provided to support this conclusion. A minimum of three samples will be collected per day of discharge during a qualifying event. Samples should be representative of the total discharge from the location each day of discharge 2026 Pioneer Trail Waterline Project 35 February 13,2026 during the qualifying event. Typically representative samples will be spaced in time throughout the daily discharge event. If there is a visible oily sheen in any discharge, a sample shall be collected and analyzed for oil and grease. Stored or collected water from a qualifying storm event when discharged shall be tested for turbidity and pH (when applicable). Stored or collected water from a qualifying event may be sampled at the point it is released from the storage or containment area or at the site discharge location. Dischargers working under an approved variance during the period from October 16 -April 30 shall also collect samples in accordance with the protocols described above. Samples are only required to be collected during active working days. Table 5.1 Sample Collection and Analysis for Monitoring Minimum Numeric Parameter Test Method Units Detection Effluent Limit Limitations Lower Turbidit Field meter/probe with NTU 1 NTU NEL=6.0 y calibrated portable instrument Upper NEL =9.0 Field meter/probe with 0.2 pH pH calibrated portable instrument SU 20 NTU or calibrated pH test kit units Oil and EPA 1664 w/silica gel mg/L 2 mg/L 15 mg/L g g Grease treatment(SGT) Annually In Non-Visible accordance Pollutants (1) with 40 CFR part 136 (1)Discharger shall perform sampling for the specific non-visible pollutants based on the pollutants that are known or that may have been spilled or may have contaminated the site. At a minimum,sampling for pH shall be conducted when runoff has come into contact with uncured concrete or other materials that could affect the pH of the runoff. Dischargers shall also collect and analyze a sample from storm water runoff that has not come into contact with the pollutants of concern for comparison. Analyses may also include parameters such as VOCs,semi VOCs,metals,salts and nutrients. 5.6.3 Sampling for Non-Visible Pollutants Monitoring and sampling for non-visible pollutants will be conducted when (1) a breach, leakage, malfunction, or spill is observed; and(2) the leak or spill has not been cleaned up prior to the rain event; and (3) there is the potential for discharge of non-visible pollutants to surface waters or drainage system. The construction materials, wastes, or activities, as identified in 2026 Pioneer Trail Waterline Project 36 February 13,2026 Section 2.5, are potential sources of non-visible pollutants to storm water discharges from the project. 5.6.4 Sample Collection and Handling 5.6.4.1 Sample Collection Samples shall be collected at the designated sampling location shown on the Site Maps and listed in the preceding sections. To maintain sample integrity and prevent cross-contamination, sample collection personnel shall follow the protocols below. • Collect samples (for laboratory analysis) only in analytical laboratory-provided sample containers; • Wear clean,powder-free nitrile gloves when collecting samples; • Change gloves whenever something not known to be clean has been touched; • Change gloves between sites; • Decontaminate all equipment(e.g. bucket, tubing)prior to sample collection using a trisodium phosphate water wash, distilled water rinse, and final rinse with distilled water. (Dispose of wash and rinse water appropriately, i.e., do not discharge to storm drain or receiving water). Do not decontaminate laboratory provided sample containers; • Do not smoke during sampling events; • Never sample near a running vehicle; • Do not park vehicles in the immediate sample collection area(even non-running vehicles); • Do not eat or drink during sample collection; and • Do not breathe, sneeze, or cough in the direction of an open sample container. The most important aspect of grab sampling is to collect a sample that represents the entire runoff stream. Typically, samples are collected by dipping the collection container in the runoff flow paths and streams as noted below. i. For small flow paths, simply dip the bottle facing upstream until full. ii. For larger flows that can be safely accessed, collect a sample in the middle of the flow stream by directly dipping the mouth of the bottle. Once again making sure that the opening of the bottle is facing upstream as to avoid any contamination by the sampler. iii. Avoid collecting samples from ponded, sluggish or stagnant water. Note, that depending upon the specific analytical test, some containers may contain preservatives. These containers should never be dipped into the flow,but filled indirectly from the collection container. 5.6.4.2 Sample Handling Turbidity and pH measurements must be conducted immediately. Do not store turbidity or pH samples for later measurement. 2026 Pioneer Trail Waterline Project 37 February 13,2026 Samples for laboratory analysis must be handled as follows. Immediately following sample collection: • Cap sample containers; • Complete sample container labels; • Sealed containers in a re-sealable storage bag; • Place sample containers into an ice-chilled cooler; • Document sample information on the Effluent Sampling Field Log Sheet; and • Complete the CoC. All samples for laboratory analysis must be maintained between 0-6 degrees Celsius during delivery to the laboratory. Samples must be kept on ice, or refrigerated, from sample collection through delivery to the laboratory. Place samples to be transported inside coolers with ice. Make sure the sample bottles are well packaged to prevent breakage and cooler lids are secure. 5.6.4.3 Sample Documentation Procedures All original data documented on sample bottle identification labels, Effluent Sampling Field Log Sheet, and CoCs shall be recorded using waterproof ink. These shall be considered accountable documents. If an error is made on an accountable document, the individual shall make corrections by lining through the error and entering the correct information. The erroneous information shall not be obliterated. All corrections shall be initialed and dated. Duplicate samples shall be identified consistent with the numbering system for other samples to prevent the laboratory from identifying duplicate samples. Duplicate samples shall be identified in the Effluent Sampling Field Log Sheet. Sample documentation procedures include the following: Sample Bottle Identification Labels: Sampling personnel shall attach an identification label to each sample bottle. Sample identification shall uniquely identify each sample location. Field Log Sheets: Sampling personnel shall complete the Effluent Sampling Field Log Sheet and Receiving Water Sampling Field Log Sheet for each sampling event, as appropriate. Chain of Custody: Sampling personnel shall complete the CoC for each sampling event for which samples are collected for laboratory analysis. The sampler will sign the CoC when the sample(s) is turned over to the testing laboratory or courier. 5.7 Quality Assurance and Quality Control An effective Quality Assurance and Quality Control (QA/QC)plan shall be implemented as part of the CSMP to ensure that analytical data can be used with confidence. QA/QC procedures to be initiated include the following: • Field logs; • Clean sampling techniques; • CoCs; • QA/QC Samples; and • Data verification. Each of these procedures is discussed in more detail in the following sections. 2026 Pioneer Trail Waterline Project 38 February 13,2026 5.7.1 Field Logs The purpose of field logs is to record sampling information and field observations during monitoring that may explain any uncharacteristic analytical results. Sampling information to be included in the field log include the date and time of water quality sample collection, sampling personnel, sample container identification numbers, and types of samples that were collected. Field observations should be noted in the field log for any abnormalities at the sampling location (color, odor, BMPs, etc.). Field measurements for pH and turbidity should also be recorded in the field log. A Visual Inspection Field Log, an Effluent Sampling Field Log Sheet, [and a Receiving Water Sampling Field Log Sheet] are included in CSMP Attachment 3 "Example Forms". 5.72 Clean Sampling Techniques Clean sampling techniques involve the use of certified clean containers for sample collection and clean powder-free nitrile gloves during sample collection and handling. Adoption of a clean sampling approach will minimize the chance of field contamination and questionable data results. 5.7.3 Chain of Custody The sample CoC is an important documentation step that tracks samples from collection through analysis to ensure the validity of the sample. Sample CoC procedures include the following: • Proper labeling of samples; • Use of CoC forms for all samples; and • Prompt sample delivery to the analytical laboratory. Analytical laboratories usually provide CoC forms to be filled out for sample containers. An example CoC is included in CSMP Attachment 3 "Example Forms". 5.7.4 QA/QC Samples QA/QC samples provide an indication of the accuracy and precision of the sample collection; sample handling; field measurements; and analytical laboratory methods. The following types of QA/QC will be conducted for this project: ❑ Field Duplicates at a frequency of one duplicate per sampling event ❑ Equipment Blanks (Only required if equipment used to collect samples could add the pollutants to sample) ❑ Field Blanks (Only required if sampling method calls for field blanks) ❑ Travel Blanks (Required for sampling plans that include VOC laboratory analysis) 5.7.4.1 Field Duplicates Field duplicates provide verification of laboratory or field analysis and sample collection. Duplicate samples shall be collected, handled, and analyzed using the same protocols as primary samples. The sample location where field duplicates are collected shall be randomly selected from the discharge locations. Duplicate samples shall be collected immediately after the primary 2026 Pioneer Trail Waterline Project 39 February 13,2026 sample has been collected. Duplicate samples must be collected in the same manner and as close in time as possible to the original sample. Duplicate samples shall not influence any evaluations or conclusion. 5.7.4.2 Equipment Blanks Equipment blanks provide verification that equipment has not introduced a pollutant into the sample. Equipment blanks are typically collected when: • New equipment is used; • Equipment that has been cleaned after use at a contaminated site; • Equipment that is not dedicated for surface water sampling is used; or • Whenever a new lot of filters is used when sampling metals. 5.7.4.3 Field Blanks Field blanks assess potential sample contamination levels that occur during field sampling activities. De-ioninzed water field blanks are taken to the field, transferred to the appropriate container, and treated the same as the corresponding sample type during the course of a sampling event. 5.7.4.4 Travel Blanks Travel blanks assess the potential for cross-contamination of volatile constituents between sample containers during shipment from the field to the laboratory. De-ioninzed water blanks are taken along for the trip and held unopened in the same cooler with the VOC samples. 5.7.5 Data Verification After results are received from the analytical laboratory, the QSP shall verify the data to ensure that it is complete, accurate, and the appropriate QA/QC requirements were met. Data must be verified as soon as the data reports are received. Data verification shall include: • Check the CoC and laboratory reports. Make sure all requested analyses were performed and all samples are accounted for in the reports. • Check laboratory reports to make sure hold times were met and that the reporting levels meet or are lower than the reporting levels agreed to in the contract. • Check data for outlier values and follow up with the laboratory. Occasionally typographical errors, unit reporting errors, or incomplete results are reported and should be easily detected. These errors need to be identified, clarified, and corrected quickly by the laboratory. The QSP should especially note data that is an order of magnitude or more different than similar locations, or is inconsistent with previous data from the same location. • Check laboratory QA/QC results. EPA establishes QA/QC checks and acceptable criteria for laboratory analyses. These data are typically reported along with the sample results. The QSP shall evaluate the reported QA/QC data to check for contamination (method,field, and equipment blanks), precision (laboratory matrix spike duplicates), and accuracy (matrix spikes and laboratory control samples). When QA/QC checks are outside acceptable ranges, the 2026 Pioneer Trail Waterline Project 40 February 13,2026 laboratory must flag the data, and usually provides an explanation of the potential impact to the sample results. • Check the data set for outlier values and, accordingly, confirm results and re-analyze samples where appropriate. Sample re-analysis should only be undertaken when it appears that some part of the QA/QC resulted in a value out of the accepted range. Sample results may not be discounted unless the analytical laboratory identifies the required QA/QC criteria were not met and confirms this in writing. Field data including inspections and observations must be verified as soon as the field logs are received, typically at the end of the sampling event. Field data verification shall include: • Check field logs to make sure all required measurements were completed and appropriately documented; • Check reported values that appear out of the typical range or inconsistent; Follow-up immediately to identify potential reporting or equipment problems, if appropriate, recalibrate equipment after sampling; • Verify equipment calibrations; • Review observations noted on the field logs; and • Review notations of any errors and actions taken to correct the equipment or recording errors. 2026 Pioneer Trail Waterline Project 41 February 13,2026 Section 6 Reporting and Record Keeping 6.1 RETENTION OF RECORDS Paper or electronic records of documents required by this SWPPP shall be retained for a minimum of three years from the date generated or date submitted, whichever is later. These records shall be available at the Site until construction is complete. Records assisting in the determination of compliance with the General Permit shall be made available within a reasonable time, to the Regional Water Board, State Water Board or U.S. Environmental Protection Agency(EPA)upon request. Requests by the Regional Water Board for retention of records for a period longer than three years shall be adhered to. 6.2 DISCHARGE REPORTING If a discharge or evidence of a discharge is discovered by the QSP, the QSP shall immediately notify the LRP and the Regional Water Board within six (6)hours of the discharge or discovery of the discharge and file a written report to the Regional Water Board within 48 hours of the discharge or discovery of the discharge. The written notification shall include: • The date, time, location, nature of operation and type of discharge • The cause or nature of the discharge • Initial assessment of any impacts or damage caused by the discharge • The control measures (BMPs) deployed before the discharge • The date of deployment and type of control measures (BMPs) deployed after the discharge event, including additional measures installed or planned to reduce or prevent re-occurrence • Steps taken or planned to prevent, reduce or eliminate a recurrence of the discharge. 6.3 REGULATORY AGENCY NOTICE OR ORDER REPORTING If the project receives a written notice or order from any regulatory agency, the QSP will notify the QSD and LRP within six(6)hours or receiving the notice or order and will file a written report to the QSD and LRP within 48 hours of receiving the notice or order. Corrective measures shall be implemented immediately following the receipt of the notice or order. The report to the QSD and LRP shall include: • The date, time, location, nature of the notice or order • The control measures (BMPs) deployed before the notice or order • The date of deployment and type of control measures (BMPs) deployed after the notice or order, including additional measures installed or planned to reduce or prevent re- occurrence • An implementation and maintenance schedule for any affected BMPs 2026 Pioneer Trail Waterline Project 42 February 13,2026 6.4 ANNUAL REPORT All discharges must prepare and electronically submit an Annual Report no later than November 30 of each year using the Storm Water Multi-Application Reporting and Tracking System (SMARTS). The report shall cover the time period from October 16 of the previous year through October 15 of the current year. The Annual Report must include a summary and evaluation of all sampling and analysis results, original laboratory reports, chain of custody forms, corrective actions taken during the compliance year, and identification of any compliance activities or corrective actions that were not implemented. The SMARTS webpage can be accessed at: https://smarts.waterboards.ca.gov/smarts/faces/SwSmartsLogin.j sp 6.5 NOTICE OF TERMINATION A Notice of Termination(NOT)must be submitted electronically by the LRP via SMARTS to terminate coverage under the General Permit. The NOT must include representative photographs of the project site and a written narrative describing how the site has been and will remain stabilized. 2026 Pioneer Trail Waterline Project 43 February 13,2026 CSMP Attachment 1 : Weather Reports 2026 Pioneer Trail Waterline Project 44 February 13, 2026 CSMP Attachment 2: Monitoring Records 2026 Pioneer Trail Waterline Project 45 February 13, 2026 CSMP Attachment 3: Example Forms 2026 Pioneer Trail Waterline Project 46 February 13, 2026 Rain Gauge Log Sheet Construction Site Name: 2026 Pioneer Trail Waterline Project WDID#: XXXX Date Time Initials Rainfall Depth Notes: (mm/dd/yy) (24-hr) (Inches) 2026 Pioneer Trail Waterline Project 47 February 13,2026 NAL Exceedance Evaluation Summary Report Page _of Project Name Project WDID Project Location Date of Exceedance NAL Daily Average ❑ pH ❑ Turbidity Type of Exceedance ❑ Other(specify) ❑ Field meter (Sensitivity: Measurement or Analytical Method ❑ Lab method (specify) (Reporting Limit: ) (MDL: Calculated Daily ❑ pH pH units Average ❑ Turbidity NTU Rain Gauge inches Measurement Compliance Storm 0.1 inches Event — Visual Observations on Day of Exceedance 2026 Pioneer Trail Waterline Project 48 February 13, 2026 NAL Exceedance Evaluation Summary Report Page _of Description of BMPs in Place at Time of Event Initial Assessment of Cause Corrective Actions Taken (deployed after exceedance) Additional Corrective Actions Proposed Report Completed By (Print Name, Title) Signature 2026 Pioneer Trail Waterline Project 49 February 13, 2026 CHAIN-OF-CUSTODY DATE: Lab ID: REQUESTED DESTINATION LAB: ANALYSIS Notes: ATTN: ADDRESS: Office Phone: Cell Phone: SAMPLED BY: Contact: Project Name Client Sample ID Sample Sample Sample Container Date Time Matrix # Type Pres. RELINQUISHED BY SENDER COMMENTS: Signature: Print: Company: Date: TIME: LABORATORY COMMENTS: RECEIVED BY Signature: Print: Company: Date: TIME: 2026 Pioneer Trail Waterline Project 50 February 13, 2026 Appendix A:Site Maps 2026 Pioneer Trail Waterline Project 51 February 13,2026 TO REND CITY OF SOUTH LAKE US FOREST SERVICE TAHOE 80 APN 080-010-012-000 APN 080 010 013 000 LUMOS _K - Z]t MSEt C!ATEH foil TRUCKEE ` > T %U 960 3200 DOUGLAS BOULEVARD,SUITE 320 j � dlit50 .. —_ (� ROSEVILLE,CALIFORNIA 95661 r �\ TEL:279.230.8336 89 /� MONTGOMERY ESTATES 4 .�� LOWWW.LUMOSINC.COM � NFO@LUMOS NC COM ci UNIT#9 HOMES D APN 080-191-001-000 ,•.' r T©LUMOS&ASSOCFIATES,INC.:STHISC IDARAWIINNG IS CARSON CITY — — USE OR REPRODUCTION OF THIS DRAWING,IN ASSOCIATES,INC.IS I KOKANEE TRAIL WHOLE OR IN PART,WITHOUT THE WRITTEN (LAKE TAH .1 PERMGOLDEN BEAR TRAIL _ _ III STRICTLYON OF PROHBTEDSTHISDRAWING SNOT I TO BE USED FOR ANY PROJECT OTHER THAN r THE PROJECT FOR WHICH IT WAS PREPARED. c�1. 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Q — — _ _ 'Th � ' &' — — — — — CONSTRUCTION LIMITS (TYP.) — — — — — — \ \ UJ - 6351 i _ - --_ _ N g358 - 6357 6356 , - - - -63 \ - - O O — _� \i \ 6354 16352Z al + — PIONEER TRAIL_\______ / I LLI - -.-- -[ 2/777// - ,-- - \Tr• - —�-- - STAGING AREA - — •1 —\ — — • — — =o •— — T— • — — — • • / ® - — — k_)', Li V -- --________ 0) • • --S---._ __. -- -..' 4._ /° ) / . • • �� 6353 \\ — / _ — — \ ))' \ (E) FENCE /7 • — O DATE: JAN 2026 6354 6 352 / _ _ — \ __ _ _ — W SCALE: AS SHOWN _ — — _ — - - - , / /_e 6352 z 6 35 — 635A \ _ - - J DRAWN: LTS / _ 635Ok 6349I U DESIGN: ALM/JA 6348 65°i Q AS BUILT: 2 2 . 1 2OF5 SHEETS NOTE: 1. DRAINAGE PATTERNS WILL REMAIN UNCHANGED THROUGHOUT CONSTRUCTION, LUM,ssacIOS TEs 6350- - � `� \ 312 DORLA COURT,SUITE 202 _ i 1 ZEPHYR COVE,NV 89448 ��< TEL:775. 88.6490 �� WWW.LUMOSINC.COM 1 INFO@LUMOSINC.COM 6351 _ / G 4G' 80' TOHEPROPERTYOF LUMOS& ILUMOS&ASSOCAATES,INC THIS DRAWING ESIN CIS / r...... , WHOLE OR USE OR IN PART,WITHOUT THE RRODUCTION OF THIS ITT NING,IN �\ - �� — / SCALE: 1" 4G' PERMISSION OF LUMOS&ASSOCIATNG ISINC.T G = STRICTLY PROHIBITED.THIS DRAWING IS NOT \ \ TO BE USED FOR ANY PROJECT OTHER THAN R. `_ _ THE PROJECT FOR WHICH IT WAS PREPARED. _� t 6352 STAGING AREA /�� /�- \ \ N (_4200 SF) / �� - --� _ _ t 6353 �� — - APPROXIMATE LIMITS OF /� - - WATERLINE TRENCH/ / I �JI - - _ - _ --= CONSTRUCTION LIMITS (TYP.) I O (2 — — _ !PIONEER TRAIL ,_ \ - - — — W wN • _I eta, a to W , S2 635/ I m 01 / \ — cl Sp - \ W U ° 19 _ 63 - - - _ _ _ I ¢ I� Cs • . • ________,,•__/ -- -iLL-__:-__)( -- -- _______ T 8 3 -- - - _ 3 —1-_______,_____„_ ---_____,___,_ ,_____"--- '12-4_,,,____„---- + cp i_.(ti ! LO L .1 6348 • • • • • — : _ _ o —� 6 se 7 3� 6339 1/416 3 633, 6336 \6335 633 6333 6`332� 63 633 6`3� CO M Ili ---- PIONEER_ _Jrli ,1 _ - • t I '- _ 6344 - - - - - ,v` ��� 6343 42 ,6340 6��1 C / co ,�^� 6 3 6 341 H 5°) C013 <0, (.0co N • LEGEND: Li) G7.a //// V STAGING AREA O I / L ' FLOW LINE ^ . . rao4-4 LA CD_ M--�I DIRECTION OF SURFACE T O FLOW F-I-� Z 1.4 ^ O HMI w Z O H0-4 H 1 H O 0 O W CD A uJ , , N v H W H N W \ _ \ CN Cr) j•- N -- _ W \ \ • \ _ \ \ ` \ U.S. FOREST I SERVICE W W _ ' . \ \ AP"f 030 0;0 ^v02-000 rv/ 0 - \ \ _ \ APPROXIMATE LIMITS OF - _ _ \ - _ - _ rzo m WATERLINE TRENCH/ y \ �� -t _ _- - CONSTRUCTION LIMITS (TYP.) I \ \ \ \ - CD . . — . . . . _ .� _ O O 33 633 —� r - \ 6 301 I . . — . + O ��� 63 633 63� 3� 32 3 b� 6' 6 • • : : ; c �0� — + _ 9 2s �S �� �� �� ��� ��,� 3,9 u,� �, •�,6 1,S &,� -&,� -,�,� ,1z� :,3�, 63°. 63°� s`�°>�s`�°s 6`�°s 63°� 63 3 6302 °�°5 �` P I O N F_E R T RA!L o(6 o �\O O . ---__ /� PIONEEF�\TRAIL— / — — -- -- - ---- - - - �� - - L - - - -- - - - - — , W 4 , _ Lij __i ___00_ _ z — T — - . _ _ — _ - - - - - _ y W — - - - - - - - - - - - - — — — —— — — .. I N. i t . in • 7 z ___. ___ 12i _ _ — _ __.-- -- N, _ _ _ _ iL'I __ ____ ____ I— -- — _ 1---- -7____J:: -----""1---"---------- --- -- -- --- J f " -s- • - - - - - l — - - — - - -- - - - - • di 0. • 0 N � D 0 ,"� ,� N • \N �1 • \ • \ • \. _ \� \ �'• _ \ \N . 63p Q DATE: JAN 2026 iso A / 3 2 K' "� ° / •s �, 6 �' °� °� �, r' �9 99 0\ fl d- N, 2 SCALE: AS SHOWN cO �j �, 3 I I 6 > > I O \ v 6 d� O �O �� r°� 28 r c° N d- N (5,1 6' s 63 3j `�, /� p\ `�'O pro`° rn o p y \ 6 �' `9 \ ' ,� N N N cv cv N v' 3 1 6 S L9")rr)00 6 `-'' In \ \. 6 7' �� 9 6 \ O co \ rn �o�� tn in coo coo co �O �� \ co to tr) ° (o �' �COrn 6' 6 6N0 62 629 \\ . 6'D CS' 0-)rn� `,9 93 '7 S� \ M I ) i \ \ \ 0") �0 �9� 96 9S\ 6� 6� �rn �,� o\ ('� \ DRAWN: LTS 1 I c° \ 9i3 `9� 0 N co .I , „. ...A. , t° ��' DESIGN: ALM/JA ll AS BUILT: 0 40' 80' 2 .2 30F5 SCALE: 1" = 40' SHEETS NOTE: 1. DRAINAGE PATTERNS WILL REMAIN UNCHANGED THROUGHOUT CONSTRUCTION, LUMOS 312 DORLA COURT,SUITE 202 ZEPHYR COVE,NV 89448 TEL:775.588.6490 WWW.LUMOSINC.COM INFO@LUMOSINC.COM ©LUMOS&ASSOCIATES,IN:TT.:THIS DRAWING IS THE PROPERTY OF LUMOS ASSOCIATES,INC.. USE OR REPRODUCTION OFHIS DRAWING,IN — — \ WHOLE OR IN PART,WITHO THE WRITTEN '�'� — \ PERMISSION OF LUMOS&ASSOCIATES,INC.IS — — \ \ \ STRICTLY PROHIBITED.THIS DRAWING IS NOT \ \ \ \ I TO BE USED FOR ANY PROJECT OTHER THAN CV i �� _ \ I \ �\ THE PROJECT FOR WHICH IT WAS PREPARED. N \ \ I / O �� -/.17:- \ \ APPROXIMATE LIMITS OF / ' - / 0rn___:::__ \ \ _ WATERLINE TRENCH/ 7 i // _ - �- --� E 'W 1 �� :\ CONSTRUCTION LIMITS (TYP.) / _ / _ _ - - - - - - "„" Mwo v— — --/ — LLI � — iONEER — _ _ _ _ _ _ — _ — �� _ o I NEER TRAIL J TRq - - _ oi — — — i I P 0• — — �• . — m r — O 6 / . - . -- �p9 63p i -= 6299 ��6297 _ i clt _� _ - - - _ 631p� 63p 1 6300 _ - - Q k I + "o `�o� �� ' - / _ - - 6311 I 6304 6303 2 _ - - _ O o C 6' -�--- _ _ _ 6313 6312 �� �" _ - O 1• \ �tLo 06 o I -��� r - :: - 1-6.305_Y - -• •• •� ® w ill I4r,I - _ _ — —Z c0 I co r� N I ` _ \ — _ _— _ ��' STAG 9 GO SREA �'• • \ — _ _ _J f _ (!J LLD , �l9 1 — _ _ — _ � N,,A ,� _ _ — • —iA) • .. ,-ss' • (0 __----- \ CP i-- .c' < , f 24L11;1 �� 1w \ ) I J o1 0 40' 80' I�li;l / SCALE: 1 40' / / p/ rn I / ��1 (0 I LEGEND: M STAGING AREA L.) W w L • • f • FLOW LINE low_ v .► DIRECTION OF SURFACE ^ FLOW 1--�•I O CDW Z h.4 0 \/ f W 0 GOLDEN BEAR TRAIL —4. 1 ._. 1 v_.., ... - Z I \ o v, vY�,l �� CALIFORNIA TAHOE CONSERVANCY r T, c� I ` 1 CC'el//� APN 080-010- 19-000 �,� M--+ W CD I 1 1 • - 1 N 100 YEAR FLOOD ZONE 0 40' 80' TYPE AE corn ' r H W 11( \ F "' I SCALE: 1" = 40' � _ _ I' i W C� \ \ ��,c)\ I \ T rT—, orDi9rD \ 1 Cc \ \•• I I v TROUT CREEK CULVERT w 6' `9ir� _ — —_ �' / UNDER PIONEER TRAIL. \ \ �� \ I c -- — TROUT CREEK IS A SEZ, (TYP) \ \ \ \ l_- PERENNIAL STREAM. I II I / I �13 • \ APPROXIMATE LIMITS OF I - _ COUNTY ROW (TYP) fLTSTYP / .) \ NI4107 r �� ' _ \ _ _ �� \ i ' \ \ — � j 16_s.)I9:17: w�— — \ \\ J L. TRAIL �\ ► 6 • . GM �. :a LL EER �1 g2 �,� N 62g 6 M. \ \\ '6______,.....----t •v _______----- PION \ .,. :Nt h2 2 s �g M \rRA \. -, -__ _ - - - - - - - • _ _ _ \ �� \ DATE JAN 2026 • 1 �f/ pr / \ \ , y 1 M\ JO _ _ - - , \ 1 : � - - , — _ -- -- _ r — — SCALE: AS SHOWN / / , — — — — 1 — — N L — L — -- - — — ---- ,_ - STORMWATER SAMPLING - - - - --ii _-T - - --� - - M :. � - , , — • \ N� • \ / „z • �`\\ \- -LOCATION _ - �� ( // / ° i - - / - ` - - �_- _=\ \� \ �/ -� :-0. - ` - , ,.i • \ • • i / / / _• - t— — -- - _ / -� - /� _7�_�_ c..� �� M `,�' DRAWN: LTS G /629 _ _ _ — • P ) \ __,t , / / / ti I / / / i / l — _ ��_ _ �� \\ �k V `V DESIGN: ALM/JA 1. / / / O _� I \ I / / / / / / / . / . / �� \ /• AS BUILT: ------"- I \ ( / / / I / /. / / , , . i �3051 KOKANEE TRAIL i . - - v v 2 . 3 \- \ ' 40F5 SHEETS NOTE: 1. DRAINAGE PATTERNS WILL REMAIN UNCHANGED THROUGHOUT CONSTRUCTION, CATTLEMANS TRAIL LIMOS 2432 CATTLEMANS TRAIL A C/4 \/<\' / / TEE 4 i 312 DORLA COURT,SUITE 202 2438 CATTLEMANS TRAIL 2442 CATTLEMANS (/ F TEPH775.5 8VE,OV89448 PROPERTY LINE N i (TYP) TRAIL _ � I WWW.LUMOSINC.COM i l / I INFO@LUMOSINC.COM SEZ (TYP) / I '1 ©LUMOS&ASSOCIATES,INC.:THIS DRAWING IS I I THE PROPERTY OF LUMOS&ASSOCIATES,INC.. / USE OR REPRODUCTION OF THIS DRAWING,IN WHOLE OR IN PART,WITHOUT THE WRITTEN y / • \ PERMISSION OF LUMOS&ASSOCIATES,INC.IS 2454 CATTLEMA S STRICTLY PROHIBITED.THIS DRAWING IS NOT / TRAIL ANY T T p THETOBE PROJECTUSEDFOR FOR WHICHPROJEC IT WASO PREPAREDHERTHAN. °�.L / / / APPROXIMATE LIMITS OF / / \ ''' / ' / IG Po / / WATERLINE TRENCH/ I 0- / //r/• / / �/ / CONSTRUCTION LIMITS (TYP.) / 1 • I I °j • N / sr / / / I I 4g. •a -:� 8p ~ / - - - - - 0 \ C5 -8 •tr / dUIS � / — • rO / *• • J L \ _ — _ — CD 0w � w -- S •— � ___ w a/ ~63p 63°��/ ' , Ill s 6304 PIONEER TRAIL o� R 1\ A fi cz, X kr) — w ill — F�Vp Q k c1 • W �44 / 0 ----•r kv ^JI 63 rP cb t — — ,, vo _ _ �zp s ep \ , �zp •• —���� V 4i , \ -\ \ . /OP.Zr=r) • • 31 \ 6'44 �•• t 11 I a ' ,��" ,/ 1., / •-:Fq NON — — — — — �os ��0 ,�pq,••• �-�/541\ • 'l 11 ate. - '-/ �/ ; -- — — 6 3 I I / FM • FNT pIc��Ah \l Q 1 ✓ / 6 76, s �: /\ >f'l R(R/p) � Fss 63 / a 6� SCALE: 1" = 40' \ ( ii 7 C� Q 3073 KOKANEE TRAIL----...____, Th3093 KOKANEE TRAIL 10 �nn8 :OKANEE TRAIL 2431 MARHSALL TRAIL/ N / }3 KOKANEE TRAIL MARSHALL TRAIL H LEGEND: U ww = STAGING AREA ~�O r / `J L — FLOW LINE � . Cao Z to DIRECTION OF SURFACE M—� FLOW w N 1.4 w Z O H 1 H 4 H O X + w O 1 0., N H w , c„) w 1.1 c....1 z Oal_ 2 DATE: JAN 2026 SCALE: AS SHOWN DRAWN: LTS DESIGN: ALM/JA AS BUILT: 2 .4 50F5 SHEETS L LUMOS y0<<\ 3200 DOUGLAS BOULEVARD,SUITE 320 ROSEVILLE,CALIFORNIA 95661 �GO TEL:279.230.8336 toi• ' • . • ,� �. •• • -t - • 1• ,. •i I L /• . •{ • • �/ �•,•� •• •� 4•' �- 4:7Pa 11 as WWW.LUMOSINC.COM /. _! •,. • �'•• •� • ' IMF �.•'` ` � , INFO@LUMOSINC.COM PP- s dB �� or + • • • -1 • / • .4.. • • , • ?� - - ♦ • _ ©LUMOS&ASSOCIATES,INC.:THIS DRAWING IS .�• . ' r _ • i �.-�, • .6 O i•."+. f ; , r • -t`'- ��• • 1%.•� .� • •�f ��� ' 1 `� THE PROPERTY OF LUMOS&ASSOCIATES,INC.. •� r" • / -' �� • • � A � • /• • - � : - � • ' - �� �, � �i• ,1• �� •�� . i•• •Writ v • � USE OR REPRODUCTION OF THIS DRAWING,IN % t-110 . • •• • � ' WHOLE OR IN PART,WITHOUT THE WRITTEN L-� • • • - • ��f`• '• • 1 I . • PERMISSION OF LUMOS&ASSOCIATES,INC.IS • r A' ` ` `~ j j •• - • • , • • . - � ` i- , t • • STRICTLY PROHIBITED.THIS DRAWING IS NOT • 1 ar i • • - • - •• A • � v' - - , • • • `� .4.. • .�•�/ •� : / •'a joi. TO BE USED FOR ANY PROJECT OTHER THAN 1I; • •. • • • - • I�S • • i.• _ - `� .. i`W•' ' ' `A. = - - • to • .Y• I:- ,- •• II `• •• • T�{{V �• - y• 0 C v THE PROJECT FOR WHICH IT WAS PREPARED. • t . I it 63 Q& 0 is .7(idi. • . . -- 044' - -.el, ... -ar ... ..... rliF.44. .- , I, ilk,- - . • _••••‘. a .. ,..,, '; . , ffi :t" .2..' ._,c.):.-. 4.4341‘lktf° "al . . • • • ..- 411',dile ••.d ek; Allikv ,,.:;., ... g •iti-.1 ..., L . •r• .- - . .•�1 , �- •1i *Or z BLACK BART • 4 ' • 10 • 7' t st • �• J z .� 1L• 10 f _ �. �:' . ' Y STAGING AREA • • ' 0. - 40 •�' - • ALL STOCKPILES ARE _• _ LOCATION m o • •_ + TO BE PROTECTED PER �� e�qc e<q o 3 - - - _'� .•_ ;.�� DETAIL 8, SHEET 3.7 4:; �&,%, Cir 09 Q Q 1 . . - -4...-- Anse . . . , 41k, re" / Yiiik. \‘‘ m* • T , . , I. ;la ‘ • _a lett °it 47.4c. .. .4011?i k . . _....- ip- ir .„,„ -je ,,� Z. STAGING AREA11. 'Y• - t ! -' •'-4. . - - • (STAY ON PAVEMENT) • • ! i'll "Op. r - •. A`' ail , ' I',i1 • 1r . . s r ,�� J ,., r � � • yr HIGH MEADOW 4 ,I�11 N=iltikr , s 4 >� � i/� �I• • • • 4* TRAIL I(\I it lb iii. • k.. Al 4.1tIri% ii • h _ •fhp _ • . - • :�♦� . . ' isr �.i H VICINITY MAP v Z 8 - P rt--..- irk. - ... . le . . . .- • . . . . . . 1 ait LLJ 4 .k. . ,ii. . , 1,-., 1, 4:::.4 - • ‘.4 . 0.. • .4 1. .;-• . , , f v . I:• -- ., OVa°.. : •, t = •.'l.. . . H.:H �i•�� -t0?,i. i:b, ..i•:2 • , , LEGEND: 1 00aH04 <C(LrZz *91v o 1" 4_(... 4 1‘1.14...."%.1 4 •I)'0•.1.'1.. -.d• t y• , AQF. .-•• 0• ...'dir4 rI.i,•i• ta1r/, •'A1-P• :-•... • .• O•. • ie.1•t. rt1.4C• .AlN.t e6 .eI ti4vi. • e( 4•t 1s 1'i.i 1/1lk ,_t.:r• . s0.- . 0.s rlb. 0144 $".• • ._ , ` r. •r• • • .j• r..� . _ • _ ► ' • + I r ,I � ' ` • • - ''s► , '• STAGING AREA • _ • , ��T ,� • K - .1 . , • 1: ti' .................. COIR LOG (FIBER ROLLS) 3.7 Z . 1 42 :� t0,.S,'` -4, f p. '+ ..a r,•I• ^ .` ,+ • = O FILTER FABRIC FENCING 2 rT, U 7 • I h 1 • (SILT FENCE) 3.7 11. DRAIN INLET PROTECTION r i ti.i+i ;. •. �. '�avc Villt • 3.7 O V^J • • ♦ • •• 'r• ?Ai; r •�•'fi-�.• ., Jr , , ' BMP• EHANDBOOKGETATION PER TRPA C� • • ` - , .. • v,3, •.�;�- ::,�' �•":'r„', STREET11; ��•_ - ��'!' 4 C --� • • • - • • • j '_' •• /� 4•004. rt o.:• . 11 � i • . TREE PROTECTIVE FENCING M--I • " ' �..• C ;• :fir• SWEEPING/VACUUMING • .,1 � � . •1 - �; , , . • �, ','' , 4. . ; •6. • _•• W.* . SHALL OCCUR DAILY I F - 401 �' <}` •• W Q4 �-i ihot ` . `�rlt SEDIMENT IS VISIBLE ��' kl- •�• 1t, ... as•-• 0 • '; ' 1�I N. Ilk"14 10 P 1.64. 11 1.-. ,, %4 .11.1-', ' . - 4 li I _.- • gilidlib. -. ." *t Jr ... ... i „........: . . , .,,, : _ _ _. . 0 ,_, ,.. ..,,,,.,.4. . . , . . .. .... IIIP ..•11i0 .. • • • Ai 9 • -.. 16. •-•- .46‘11V Z r ,9 r:Q - _ _ - - BLACK BART AVE. VC • • - -dripms__ ,. Se • a LOCATION DIRECTIONS: FROM PIONEER TRAIL, TAKE BLACK BART AVENUE TO THE STAGING AREA BLACK BART STAGING AREA NOTES: - _ �'-•ar--°--A-' 11/ 714 9.1 lk;4 1. BLACK BART STAGING AREA MAY BE USED FOR STAGING MATERIALS AND EQUIPMENT PRIOR TO MOBILIZATION TO THE PROJECT SITE. •. •• * - • r • ! • •2. ALL EXCESS SPOILS ARE TO BE DISPOSED OF AT A TRPA APPROVED LOCATION, NO STORAGE OF SPOILS WHICH ARE NOT SCHEDULED TO BE REINSTALLED. ~• % _ .••• 1115�� �• •• �• -• 1'4. ;:i • r r :: i ;t I y F. • % DATE: JAN 2026 ilv 3. NO VEHICLE OR EQUIPMENT MAINTENACE ALLOWED IN STAGING AREA. NO STORAGE OF FUEL, OIL, DEF, OR OTHER FLUIDS ALLOWED. • •1 116 - - -• - 0 .,� • ` • • im • • � • •' • . 11% :••:• N SCALE: AS SHOWN 4. CONTRACTOR SHALL PROVIDE TEMPORARY SANITARY CONVENIENCES AT ALL STAGING AREAS PER STPUD SPECS. •• •• - �• •. .ft �"� • •► • • - 4101, DRAWN: LTS 5. THIS PERMANENT STAGING AREA IS EXPECTED TO BE COMPLETELY CONTAINED. COIR LOGS (FIBER ROLLS) SHALL BE KEPT ON SITE TO PLACE IF NEEDED. DESIGN: ALM/JA BLACK BART STAGING AREA ( � AS BUILT: IA 3 . 1 1 OF 8 SHEETS . , , . . rice itir. . , . • • • • . TA, 160 0 , . • • 4: 71111F10, ,, ,i , To T rioE 9� • . •• N. 1 at 1•• , tiPK� N % L1.1114 4 DISTRICT'S NORTH GATE d MA6jILAINTAIN FULL WIDTH OF • , CITY OF SOUTH LAKE &A � TAHOE PLAY FIELDS SIGN LOCKED VERTICAL LIFT GATE , O ACCESS LOOP FOR DISTRICT 24 " • 3200 DOUGLAS BOULEVARD,SUITE 320 ROSEVILLE,CALIFORNIA 95661 HOUR OPERATION TEL:279.230.8336 MAXIMUM HEIGHT 14 FEET Q- r► , � WWWLUMOSINCCOM 4 . INFO@LUMOSINC.COM MI Illeillial ©LUMOS&ASSOCIATES,INC.:THIS DRAWING IS • li , . , PCC � USE OR REPRODUCTIONTHE PROPERTY OF OSO FTHIS DRAWING,INC..N �� STREET SWEEPING/VACUUMING 4 ,GR, ���� OR IN PART, WITHOUT THE TEN • Ols�g1C 0 41O TO BETUSED FOR ANY PROJECT THER THAN T C� SHALL OCCUR DAILY IF4 AL THE PROJECT FOR WHICH IT WAS PREPARED. T SEDIMENT IS VISIBLE p _ •, DISTRICT'S NORTH U �� ‘TA/ > GATE i LOCKED VERTICAL Li) p CONSTRUCTION ENTRANCE LIFT GATE MAXIMUM o ZQ.Q jIGHT14FEET ,? • ! ' SEE DETAIL 1 ON THIS SHEET rir v 1 .; •• 0 411001- � ��• 0 A- 1 L� • le,' tt • , • MAINTAIN FULL WIDTH OF ACCESS J y lot LOOP FOR DISTRICT 24 HOUR COCO / 1 OPERATION 0 IZ iLa..... / & i 11.11. LJ iZr. 4 � i . � . d co •� 14 ~. . • . STTAGING AREA Q v li° 4°.."...444),A , , , /�0.-7 _ . • i • ; • 1 r Aill' )11P o •• g ` Crushed aggregate greater than 3" o 1 . , `�) but smaller than 6" Filter fabric 1 0 ,. acv Original • v' o *if. • ge " . i li,;1 o o o grade I +16: • 12 " Min, unless otherwise - 4 �I specified by a soils engineer 1 Z , / o SECTION B— B • INTS • io_J . , VICINITY MAP . il I- d NOTE: 0 rao st Construct sediment barrier I • ,: w �� and channelize runoff to O •� /.• r� �� o I sediment trapping device , Ail • r 0 0' `10 • LEGEND: Z E —' c a •• o • • Ct • y�•r• • • • 4, "10• STAGING AREA ••�•I•i� •I••i• •1'. �• •I•i• •I••i• •I'. :• •I• •:• •I••i• /000 �1 i+ .Yi•,t. .. . • ”ei ► . ,:�i �., •.- •fit. .j•fit. • .♦jWit. .• 10 min or0 f•> Vr-t•.d '•. • •.t•�l•. '1• : •• •4i'f•• •�'.40% as required to .. . O•••. .... •oi.•. ..� ••••. .*.:. .0,.• accomodate jCONS Q /�••% •.���,:��!<,�4�.9'. ..%• ••#i•iiI •i�Ii ••�illi."•�i�Ii•• anticipated ���"� COIR LOG (FIBER ROLLS) • • .••• :.�:'i:`-; '• �. •.o••0 ••i • •wLlrai is traffic, whichever o <4 11161 I -* - ��;.�•���:`••%f�'�r••U�•; ° .•�: •.�‘;,�•���;�•%•I is greater • • • r • H I j •,:�•• � • •„ •'• " •„ •�•" •" i .II I .' I 'Ilk O FILTER FABRIC FENCING 2 to �••'t \ . lif 11, g i 0 �• � • / (SILT FENCE) 0111 3.7 O w Temporary pipe culvert B • 1 I ji!lIllDRAIN INLET PROTECTION F� , as needed 3.7 OCA • 4 diror I . If 141 i 50' Tvplcal r • • - R w EVEGETATION PER TRPA • I A' BMP HANDBOOK 4(1) Length should be extended to 1 2 times the diameter of i 0 • , • F--�-� s — x — TREE PROTECTIVE FENCING gir the largest construction vehicle tire. k 1 \ ` • • H M Match (2) On small sites length should be the maximum allowed by site. • • , Existing o ; •iIlk_ w Grade PLAN • t ' �►� ! W 0 NTS 1 s 1 - 6 STABILIZED CONSTRUCTION ENTRANCE/EXIT id I _ • t _:_2, SCALE: N.T.S. 1 N • _ , . O If 0 I of/ 0.4 LT4 ..011. • . rn. o f • I / A • • • LOCATION DIRECTIONS: iiir4 . . FROM HIGHWAY 50/LAKE TAHOE BLVD OR PIONEER TRAIL, TAKE AL TAHOE BLVD TO THE NORTH GATE ACCESS ROAD r I 0 sA. 4 _BONE YARD STAGING AREA NOTES: V ,r• o o ',r►Jllk 1. BONEYARD STAGING AREA MAY BE USED FOR STAGING MATERIALS AND EQUIPMENT PRIOR TO MOBILIZATION TO THE PROJECT SITE. STAGING MAY ��f• O JP O o• • BEGIN ONCE SNOW HAS MELTED FROM THE STAGING AREAAND SATURATED CONDITIONS NO LONGER EXIST. � � ile11111111 �� 2. ONCE CONTRACTOR HAS MOBILIZED TO THE PROJECT AREA, BONEYARD STAGING AREA TO ONLY BE USED FOR STAGING NEW AGGREGATE AND SOIL ' i DATE: JAN 2026 MATERIALS (NO PIPELINE MATERAILS OR EQUIPMENT TO BE STAGED IN THIS AREA, EQUIPMENT USED FOR LOADING AND PROCESSING MATERIALS IS STAGING AREA OKAY). PROJECT EXCAVATED SOIL MATERIAL MAY BE STAGED IN THIS AREA IF IT IS BEING SCREENED TO BE REINSTALLED ON THE PROJECT. ALL STOCKPILES TO BE N SCALE: AS SHOWN 3. ALL EXCESS SPOILS ARE TO BE DISPOSED OF AT A TRPA APPROVED LOCATION, NO STORAGE OF SPOILS WHICH ARE NOT SCHEDULED TO BE REINSTALLED. PROTECTED PER DETAIL (� 3.8 • DRAWN: LTS 4. NO DEBRIS,ASPHALT, ROOTS,TRASH, ETC WILL BE ALLOWED IN STAGING AREA. DESIGN: ALM/JA 5. NO VEHICLE OR EQUIPMENT MAINTENACE ALLOWED IN STAGING AREA. NO STORAGE OF FUEL, OIL, DEF, OR OTHER FLUIDS ALLOWED. 111151111V /DP IVr 6. USE OF BONEYARD STAGING AREA LIMITED TO BETWEEN MAY 1 AND OCTOBER 15.THIS STAGING AREA MUST BE COMPLETELY DEMOBILIZED AND ! Alt:1r ie `,n AS BUILT: CLEANED UP PRIOR TO OCTOBER 15. frvA f�L� 7. CONTRACTOR TO INSTALL BMPS CONSISTING OF FILTER FABRIC FENCE PER DETAIL 2 ON SHEET 3.8 ON THE DOWNSLOPE SIDE OF STAGING AREA PRIOR 3 .2 TO STAGING OF ANY SOIL MATERIAL. BMPS ARE TO BE MAINTAINED THROUGHOUT THE USE OF THIS AREA. BO N E YARD STAGING AREA 20F8 8. CONTRACTOR SHALL PROVIDE TEMPORARY SANITARY CONVENIENCES AT ALL STAGING AREAS PER STPUD SPECS. SHEETS NOTE: 1. DUE TO THE LINEAR NATURE OF THIS PROJECT, ONLY BEST MANAGEMENT PRACTICES IN THE CURRENT AREA OF WORK WILL BE INSTALLED. 14 2. COIR LOGS ALONG TRENCH ARE SHOWN CONCEPTUALLY AND SHALL BE INSTALLED PER DETAIL 5, 3.8, DOWNHILL OF TRENCH, WITH THE SPOIL PILE UPHILL FROM TRENCH IN THE AREA OF WORK. LIMOS 3. FOR ALL SOILS THAT WILL REMAIN INACTIVE FOR MORE THAT 14 DAYS, A WOOD AIICIATE S FIBER MULCH AND TACKIFIER SHALL BE APPLIED. THE APPLICATION RATE SHALL BE SPECIFIED PER THE MANUFACTURER. 3200 DOUGLAS BOULEVARD,SUITE 320 4. VISIBLE SEDIMENT TRACKING SHALL BE SWEPT OR VACUUMED ON A DAILY BASIS. ROSEVILLE,CALIFORNIA 95661 5. ALL VEGETATION OUTSIDE OF THE WATERLINE TRENCH SHALL BE PRESERVED TO TEL:279.230.8336 SUSQUEHANA DRIVE TO THE EXTENT POSSIBLE. www.LUMosINc.coM INFO@LUMOSINC.COM 6. NO FUELING, CLEANING OR MAINTENANCE OF VEHICLES SHALL BE PERFORMED '� ONSITE UNLESS VEHICLE IS UNABLE TO BE MOVED. ©LUMOS&ASSOCIATES,INC.:THISDRAWINGIS �'- - THE PROPERTY OF LUMOS&ASSOCIATES,INC.. _ f \__________I______) 7. NO NON-STORMWATER DISCHARGE IS AUTHORIZED USE OR REPRODUCTION OF THIS DRAWING,IN I I I 8. ALL OPEN EXCAVATIONS SHALL BE SECURED PER DETAIL 7, SHEET 3.7 WHOLE OR IN PART,WITHOUT THE EWTTEN RMISSIIONOFLUMOS&ASSOCIA ES NC.IS r` I I I I / / TO BIE CTLY USED FFORBITED. O THAN PROJECT OTHER AN 2062 SUSQUEHANA DR. f r, !I II THIS DRAWING IS NOT THE PROJECT FOR WHICH IT WAS PREPARED. --- ''.5' ' tom_ I.2``\_____j\.,..c,_ — \ I / / IaAIp • �� i11 -\ / , — N / / I/ 1 O cn �. r •� \ \ \ ) / / o ZQ _ ` t QA 6468 / / 1 •,. Q _ STORMWATER SAMPLING ' t \ 6467 / / I U--I c�i ' �. LOCATION 3 _ -J V\ y 6466 / / / CO M + \ . 6 _ / \ U Q sz 64 — I 2070 • - 7 o \ \s / 6463 / / A m I I P SUSOUEH�NA DR'\ s \ \e,, :i; \ (I) ifi \ ,� 2' 3 SU QUEHANA DR. \ / 6462 / / \ a ,;�,N '•.N / 646O6I - ADHERE TO TRAFFIC / / J \ O = d co N ,,8p 6459 APPROXIMATE LIMITS OF CONTROL PLANS & / \ Q L /6458 WATERLINE TRENCH/ COUNTY ROW / + v ��. - SECURE OPEN / / / o - - - ` - I - /6457- - CONSTRUCTION LIMITS (TYP.) (TYP) EXCAVATIONS PER - / / - -/ O I, J CS - f - _ _ - CV �j �_ D •I�L'1S �s: \ - - 64566455 64 - - — DETAIL 7, SHEET 3.7 _ / - - /— - -/ - - -- / - I w �� O , t , -, cl II 5 3 Z , 1 '0]) 1 S — — — — — — Itn yz r v� BAN . N. . .. N ..... .N ( co 161 6' 45, o I �s� s� x'� z= 5 PIONEER -I-RAIL —� �-� ��"F'N �p U ' V. 6 — A 0 40' 80' 0,11,;1 12+00 / ' / / / / / I _ - 13+Q0 / /'')\ 14+00 1 / / / 15+00 16+U SCALE: 1" = 40' ;I 6453 — — — — — — i — - — — � 1 +,UU l 18+U0 / 19+00 / 20+00 Q rlti' 6452 - - - - -6644 - - - - _. __ - • - - a ® 6446 6445_6444 J® - a _ - • __ - • —•— - / � / 6447 ,\�6448 0 - - - 6443 6442 6441 • 6� 6�36 6435- - 5N �5 -• / -- i Pli 6446 ' / ,. - ». « - - - - - - 6440-�b,.D A�� c°� c°� 6432 6 1 6430,6429 642� 6�21 64 6�6�2� 6�2& 6423 ��`L9' 6b21 Aix �\��� �< ��ti LEGEND: U W\N- ik 1 // 2 STAGING AREA O ^�^ 'N COIR LOG (FIBER ROLLS) 3 (SEE NOTE 2) .7 :411 O O -0- FILTER FABRIC FENCING 2 .� Q (SILT FENCE) 3.7 H + DRAIN INLET PROTECTION 1 Z O 3.7 O Cr UREVEGETATION PER TRPA O BMP HANDBOOK 4 Z H — X TREE PROTECTIVE FENCING VP L,1 • ,y I TREE REMOVAL h--�I •,•,• '. I_6370 O N STORMWATER SAMPLING ` FLOW LINE C + N LOCATION \ �" �/ \ �l :, _ \ 637/ `11/ DIRECTION OF SURFACE ~ M--�-I O ti NN , i 911 T11 �\\ \ i k i FLOW j W rI \ \ \\ \\ - � 6373 / M \\ \ \ \ \ A. \ �� I 0 40' 80' w \ N \\ \ \\ \ \ \' �t�� 6�j 2015 JICARILLA DR. 1797 PIONEER TRAIL = W W/ \\ \\ \ NNi\ssi ___ _ \_\_ :r. ii‘lr-r-33 6�j S SCALE: 1" 40 \ \ I \ \ - - it Z I 6 9 i \ ) N - ....,6: \�� m 6 87 ) A O �- a,, r / \ q°\ 638� STORMWATER SAMPLING I I 1801 PIONEER TRAIL O -- / \ I PROPERTY LINE 1968 JICARILL,4 , e 6 - - + - ) I eti • 1'.. 1- `3& I LOCATION I o C� z - - -____/ I (TYP) \ N APPROXIMATE LIMITS OF _ - '6A. I •� o CO m / / \ WATERLINE TRENCH/ \ :3' � s;,63. G ' , 1 III i _r )c)---cy • ` ADHERE TO TRAFFIC W IV • � '"¢-- � i CONSTRUCTION LIMITS TYP. g CD p • I - - (TYP.) CONTROL PLANS & -+ d ro - n% SECURE OPEN _ _ _ W O �� a 6' cA \ 3. 6 EXCAVATIONS PER - - - 7 637 , J _t_ �� - co c9 d g. • c9 '`T .. .: r-:� _ 3 � �38 s DETAIL 7, SHEET 3.7 - 5 - 1� _._/ ----, 0 -..-.! ( ") W / �o p O \ - .` " , ; 6' mod, .,, T— i 6 3 7 6 30+00 — 1 +U QQ s .9 c�0 • - 6' , ; . 6 t�9 9 I I IN —�� —��� 6 T - _ ��_ _�� / ��� � � � r`' 6 "� �' 6, 6 `t90� I � is? _ - - 637 377 m - / ���/ -__ -- 2100 _ -___��� ����� �9,� `39� 7 � � \ � : � 63 �84 63 6,3 � 6380, \ 6`39 8 2g�00 � --- � � _ � - � DATE: JAN 2026 0� / �X•�/ (��� —" �; _ ..••yyyyyyyyyy ❖.❖.❖.•.yo,�. „,. 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DUE TO THE LINEAR NATURE OF THIS PROJECT, ONLY BEST MANAGEMENT PRACTICES IN THE CURRENT AREA OF WORK WILL BE INSTALLED. 2. COIR LOGS ALONG TRENCH ARE SHOWN CONCEPTUALLY AND SHALL BE INSTALLED PER DETAIL 5, 3.8, DOWNHILL OF TRENCH, WITH THE SPOIL PILE UPHILL FROM LIMOS TRENCH IN THE AREA OF WORK. 3. FOR ALL SOILS THAT WILL REMAIN INACTIVE FOR MORE THAT 14 DAYS, A WOOD ALI�IATE FIBER MULCH AND TACKIFIER SHALL BE APPLIED. THE APPLICATION RATE SHALL 3200 DOUGLAS BOULEVARD,SUITE 320 BE SPECIFIED PER THE MANUFACTURER. ROSEVILLE,CALIFORNIA 95661 4. VISIBLE SEDIMENT TRACKING SHALL BE SWEPT OR VACUUMED ON A DAILY BASIS. TEL:279.23o.B33s — — 5. ALL VEGETATION OUTSIDE OF THE WATERLINE TRENCH SHALL BE PRESERVED WWW.LUMOSINC.COM TO INFO@LUMOSINC.COM TO THE EXTENT POSSIBLE. ©LUMOS&ASSOCIATES,INC.:THIS DRAWING IS 6. NO FUELING, CLEANING OR MAINTENANCE OF VEHICLES SHALL BE PERFORMED THE PROPERTY OF LUMOS&ASSOCIATES,INC.. USE OR REPRODUCTION OF THIS DRAWING,IN ONSITE UNLESS VEHICLE IS UNABLE TO BE MOVED. STO O WHOLE OR IN PART,WITHOUT THE WRITTEN 7. NO NON-STORMWATER DISCHARGE IS AUTHORIZED 40 M� J PERMIssIONOFLUMosBAssoclATEs,INc.ls R STRICTLY PROHIBITED.THIS DRAWING IS NOT 8. 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Z r 1,9 _ _ CD 04 V — — — LJ — — — — LLI _ _ II 6351 _ �� F- 6358 635� } 6356 — — — -------\----------------,____. — — Q TRAIL I 6355 o PIONEER TRAI� l 635 6352 •- / W + 40+00 4 W p 41+00 42+00 _ -- _ -- . . :: ) PIONEER TRAIL 63� 2 II________7 .� + • ' /.' ( *XX-2) = _____; ______ __ _-______________ i I NIA Z — — %% — STAGING AREAli — — — — — — —T— — — — f® '%%%%%%•• • I 4/ •,''•r%Oh • • q Jle —_ — • ,•i%r:syv,,,:mo:::::: �t •••••••••iiiiiii••nrtrru,•rrrr —�J .. (-2,700 SF) I I ••••yy rrrr uiii•••,rrrrrrrrtrrrrrnrrrc, O.—L.1)W 6 �h + �� irrr.......r,.p....,crrrrrr rrr.....,rrrr,•�•�•�•�•�r�•.`P • ► • EXISTING DIRT ROAD. MAINTAIN ACCESS 63SS ' • cn 0 •• I / THROUGHOUT CONSTRUCTION. \ �� •• • (E) FENCE � ' \� CD ..F 5 CD Q 63S / _ — _ \ �,— ���� \ / DATE: JAN 2026 — b�� W SCALE: AS SHOWN 6352 / - - — — — 6352 z 6351 ROADSIDE STAGING AREAS SHALL BE — — — — — — — DRAWN: LTS USED FOR EQUIPMENT STAGING AND — — 635 — _1 MATERIAL STOCKPILING ONLY. — 6350k 6349 MATERIAL STOCKPILES TO BE \ C U DESIGN: ALM/JA PROTECTED PER DETAIL 8, C3.8 6348 6-hts`7 I- AS BUILT: I 3 .4 40F8 SHEETS NOTE: 1. DUE TO THE LINEAR NATURE OF THIS PROJECT, ONLY BEST MANAGEMENT PRACTICES IN THE CURRENT AREA OF WORK WILL BE INSTALLED. 2. COIR LOGS ALONG TRENCH ARE SHOWN CONCEPTUALLY AND SHALL BE INSTALLED PER DETAIL 5, 3.8, DOWNHILL OF TRENCH, WITH THE SPOIL PILE UPHILL FROM TRENCH IN THE AREA OF WORK. L � � 4TF 3. FOR ALL SOILS THAT WILL REMAIN INACTIVE FOR MORE THAT 14 DAYS, A WOOD FIBER MULCH AND TACKIFIER SHALL BE APPLIED. THE APPLICATION RATE SHALL BE 1• , 3200 gFll SPECIFIED PER THE MANUFACTURER. - - 6350 - 4. VISIBLE SEDIMENT TRACKING SHALL BE SWEPT OR VACUUMED ON A DAILY BASIS. ROSEVOLLELCAAS BOORNAA95661 RD,SUITE320 - - / �'��� 5. ALL VEGETATION OUTSIDE OF THE WATERLINE TRENCH SHALL BE PRESERVED TO �� TEL:279.230.8336 ROADSIDE STAGING AREAS SHALL BE TO THE EXTENT POSSIBLE. 1 WWW.LUMOSINC.COM USED FOR EQUIPMENT STAGING AND 6. NO FUELING, CLEANING OR MAINTENANCE OF VEHICLES SHALL BE PERFORMED INFO@LPROHIB c.coM MATERIAL STOCKPILING ONLY. ONSITE UNLESS VEHICLE IS UNABLE TO BE MOVED. ©LUMos&AssoclATEs,INc.:rHISDRAWINGIs 6351 7. NO NON STORMWATER DISCHARGE IS AUTHORIZED 0 40' 80 THE PROPERTY OF LUMOSB ASSOCIATES,INC.. _ MATERIAL STOCKPILES TO BE USE OR REPRODUCTION OF THIS DRAWING,IN 8. ALL OPEN EXCAVATIONS SHALL BE SECURED PER DETAIL 7, SHEET 3.7 WHOLE OR IN PART,wITHINMC WRITTEN SCALE: 1" = 40' STRICTLYI I PROHIBITED.THIS DRAWING IS NOT - PROTECTED PER DETAIL 8, C3.8 ASSOCIATES,INC.IS TO BE USED FOR ANY PROJECT OTHER THAN • / 6352 `STAGING AREA ��/ _ THE PROJECT FOR WHICH IT WAS PREPARED. M (-4200 SF) / STREET SWEEPING/VACUUMING SHALL I- 353 OCCUR DAILY IF SEDIMENT IS VISIBLE APPROXIMATE LIMITS OF w - WATERLINE TRENCH/ v 1.1 — — _ 1-- CONSTRUCTION LIMITS (TYP.) ADHERE TO TRAFFIC a,rJ�ECONTROL PLANS & 0 o, • !`�� R TRAIL - SECURE OPEN J p U (/� _ - - - - _ EXCAVATIONS PER W � � � DETAIL 7, SHEET 3.7 CO J ,o CCI to W Sv�/J -- .............•iiiiiiiiiiiiiiiiiiiiiii,•„• CL `5 +QQ o 03 �� \ ---7------------- - - - J rs j —�J- ® •• • ••.Jiiiiiiiiiiiiiiiiiiiiiihiiiiiiiiiiiiiiiiiiiiiiiii•.S;••r r r•,,,,,,•�_ w 4 11 — — Q) CO ‹. --li 6,35/ - - � � w 6350 - - - 3 6 O o � � • •.ro---\0,70, Nz a\ ______________ — ••1 •........•iiiiiiiiiiiiiiiiii• ••i -- v � 6j 6 N ,— c���__,— r Q O 6349 -k / A Sco - + �3 6 1-0 (E) FENCE 6348 - i k'� — — �� 6SQ` 6S0-6-7- 6SS 633 633 633 633 633 63 633 C4 1- 2 11! — - s - `� k ) ......•oo:•.•.•.•000.•.•.•.•r:.;�•o.•o.•.•.•s•.•.•o.•`•�••:- 8 6 S 2 0 2 • 3 U-I 0 z • — -_ PI ONE \ • _ .. .,,•.•.•.•.•.•.•.•.•.•,•,•,• — ' R TRAIL _I 6� � (E) SIGN, PROTECT IN PLACE • / - ............................Ao.•.•.•.t❖.�c•.•..•••,..•...•.W....,. _ p '•'•"'°'""s'•'•'••'''•'•'•••'.'•'•'o•'.'.'•'.'o.•oo..- errr.❖.e❖.❖.❖o.•o.❖.•o.•o.❖.e❖o.• \ 60+00 ����. J to 634 i OR REPLACE IF NECESSARY - I 0 — _ kr� -� .' -� -� fit. ` c(Ii� I-- 6��6 (E) SIGN, PROTECT -•�-' - • - -(• • _ /� �I�i c THROUGHOUT • •6��_ (E) FENCE, PROTECT CONSTRUCTION • /l • • • / • Q ( i , � - - 344 THROUGHOUT - - - - __ - • �� / '� v��''� 6 CONSTRUCTION �� �A Z "� ") N 6 634p 6�� / ca ^� AD co H CO Cn \ �� ,�4'4'� LEGEND: U / STAGING AREA 1 1 ` O ao iewiwiwiwzmArmi, COIR LOG (FIBER ROLLS) (SEE NOTE 2) 3.7 �'`� w O O = O- FILTER FABRIC FENCING 2 �/ CD(SILT FENCE) 3.7 W F•-��I DRAIN INLET PROTECTION 1 z O 3.7 REVEGETATION PER TRPA O BMP HANDBOOK W U O 4 H Z H TREE PROTECTIVE FENCING X TREE REMOVAL O 0 FLOW LINE DIRECTION OF SURFACE O Q ~FLOW �--�•I ' ^ Wu J ,\ \ CO H CO - , / \ N T V J \ \ — / — — — \ �. _ \ \ \ (24 \ — — — U.S. FOREST SERVICELLI . - - - APN 080-030-002-000 w 0 \ _ APPROXIMATE LIMITS OF • - _ - \ \ WATERLINE TRENCH/ \'.� '''''' - '*--.:2-..::: ADHERE TO TRAFFIC CO \ STORMWATER - - _ v r - - CONSTRUCTION LIMITS (TYP.) ISAMPLING LOCATION & v Q _ - - - — :CigNuATELr?PoPLNEAsNN: _ _ \ w O h� W ---- - - - - - - - \ — - -�-� 77R - - ^\ w ^ - - - - Ll F--�-I I LLI \ ---- _ - - - - - - - - - - - - - - - - - - - - - DETAIL 7, SHEET 3.7 • - • - — — � O .,� p �� 6S 6SS 6S� S� S� S b� 6' 6 \6 . : \ O� I O` + ,�, 9 �6 �S �� �S �D� ��J �.�� `3z9 `3�� `>'� S76 `�<S S7rr 57�3 �7� S>> 2 __I.! • 6303 63p2 6O� � co N- 63+00 �� 6 _ .: I O N E_t R TRAIL I L ^� o o �1 60+00 /� �IONEEI��TRAIL�- I .. .... .. - - -- -- - - -- - - - --- _ �` - - — - - ° — - — — — w �_ .......•iiiiiiiiiii!ii:ii°iiiiL ••,,,,•• — -- — — ..+-�.•iC�... 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DUE TO THE LINEAR NATURE OF THIS PROJECT, ONLY BEST MANAGEMENT PRACTICES IN THE CURRENT AREA OF WORK WILL BE INSTALLED. 2. COIR LOGS ALONG TRENCH ARE SHOWN CONCEPTUALLY AND SHALL BE INSTALLED PER DETAIL 5, 3.8, DOWNHILL OF TRENCH, WITH THE SPOIL PILE UPHILL FROM TRENCH IN THE AREA OF WORK. LUMOS 3. FOR ALL SOILS THAT WILL REMAIN INACTIVE FOR MORE THAT 14 DAYS, A WOOD FIBER MULCH AND TACKIFIER SHALL BE APPLIED. THE APPLICATION RATE SHALL BE _iYATEZ SPECIFIED PER THE MANUFACTURER. 4. VISIBLE SEDIMENT TRACKING SHALL BE SWEPT OR VACUUMED ON A DAILY BASIS. 3200 DOUGLAS BOULEVARD,SUITE 320 5. ALL VEGETATION OUTSIDE OF THE WATERLINE TRENCH SHALL BE PRESERVED TO ROSEVU.L30.833 CALIFORNIA TEL:279.230.8335 TO THE EXTENT POSSIBLE. WWW.LUMOSINC.COM 6. NO FUELING, CLEANING OR MAINTENANCE OF VEHICLES SHALL BE PERFORMED INFO@LUMOSINC.COM ONSITE UNLESS VEHICLE IS UNABLE TO BE MOVED. ©LUMOS&ASSOCIATES,INC.:THIS DRAWING IS . \ - / 7. NO NON-STORMWATER DISCHARGE IS AUTHORIZED THE PROPERTY OF LUMOS&ASSOCIATES,INC.. \ 8. ALL OPEN EXCAVATIONS SHALL BE SECURED PER DETAIL 7, SHEET 3.7 USEORREPRODUCTIONOFTHISDRAWING,IN WHOLE OR IN PART,WITHOUT THE WRITTEN "', i, \ 9. CONTRACTOR SHALL EXPECT SHALLOW GROUNDWATER WILL BE ENCOUNTERED PERMISSION OF LUMOS&ASSOCIATES,INC.IS STRICTLY PROHIBITED.THIS DRAWING IS NOT _ _ \ \ WITHIN 5 FT BELOW GROUND SURFACE IN SEZ ZONES. DEWATERING PER TO BE USED FOR ANY PROJECT OTHER THAN vJ �� ` \ N i \\ / I SPECIFICATIONS REQUIRED. ^ THE PROJECT FOR WHICH IT WAS PREPARED. M 4:,i‘_.--___:. __ 5 z _ _ \ \ \\ APPROXIMATE LIMITS OF — — — 0 �� _ \ \ \ WATERLINE TRENCH/ / / — — — —� ' 111 - i — . • \ �\ CONSTRUCTION LIMITS (TYP.) ADHERE TO TRAFFIC I / _ _ _ — — — — — — """ W o w ,2,v v� �\� _ CONTROL PLANS & — — _ — — — Ca .- v = 6�1 \ � � \� i_ SECURE OPEN STREET SWEEPING/VACUUMING SHALL I — — � _ — — — —_ . � — � � " . J � �_. �. _ 1,411, \ _ OCCUR DAILY IF SEDIMENT IS VISIBLE �- / , - — -�• ` ww63�1 \ _ \ _ _ — EXCAVATIONS PER — _Li j :::;s!! Gz1 _ _ — _ - - ` DETAIL7, SHEET3.7 _ — _ — __ T..:::.:....:..... _. i0 E — _ _ _ - �— _ N TRAIL . • e�..• ••.::::::;-::: -- �- oN ER _ 1 - PIO EEC ,......,..... :.:::::: -- "4----. `' m._.... .....„.,.,....„,,..,_± ..:.,...:r �i `CI) \ \ ��•,'i4'!'i• q•,�,.'•��L,'J,Srr- 313 . / — — 6j0 — —:;.::..,r..,............... iii'i'C.iircaa:;:.'.^.a°.°a.°F:....... .c... O ._ E \ \ .....,,,,,,,: ..............s �� ....... _ 63p o1 -6300— — 9 =�. °0 - _ / - - - - - 6 6304 303 2 _ • Q --- -------- -:'474N6 '''' In v' 1 �_•� . r _ _ _ N. \\ O �� O M 1 1 N \ \ _ , ''''''''','''r'r'r'r'''�������diriririririririri!Jiriririririiiiia. f t�r i'.. �" I — LLJ JflJ \ in Q CO 17 1 C� — \ _ _ •o;' GAR / .: j \ Z c0 I N \ ` _ — \ — -- — %�. ��` STA 1'900 SF) �, — :c.f. c)_629 1 n I \ 0 o \ — - —I'� t'n -o z \ _ — — — — — v— rn u, '::.4yy�pprw,.�..'.'.w /��//�\\\UUU\\\U I y r :„.:____________:: • �s I ROADSIDE STAGING AREAS SHALL BEF— OA rn / i •• �• • N • USED FOR EQUIPMENT STAGING AND Q II�j ��LO \Cb ��1 ®p / o ® : ,0_5\07 \ I • I MATERIAL STOCKPILING ONLY.—_co no 15�,D \ _ � ( ��— MATERIAL STOCKPILES TO BE,...x,sisi iiii .,,,,. 0 40' 80' �L.- �� 6 31 3 �1� / 63 PROTECTED PER DETAIL 8, C3. SCALE: 1" = 40' / / r, rn 7 / I LEGEND: �—' WSTAGING AREA � s • •'•'•'•'•'•'•'•'•'•'•'•'•'•'•'•'N COIR LOG (FIBER ROLLS) 3 O (SEE NOTE 2) 3.7 ^/ 1. = 0 FILTER FABRIC FENCING O O (SILT FENCE) 3.7 w CD DRAIN INLET PROTECTION 1 Z E + 3.7 °-4 Z O REVEGETATION PER TRPA O BMP HANDBOOK 4 rT, U \ V — X — TREE PROTECTIVE FENCING W O GOLDEN BEAR TRAIL I \ X TREE REMOVAL . O o STORMWATER SAMPLING / ` — FLOW LINE O \ II , LOCATION • I 1�� _ DIRECTION OF SURFACE + r� l r ' . CALIFORNIA TAHOE CONSERVANCY `�1 FLOW 0 O � � I k�l �, APN 080-010-�19-000 ���� r--� 124 \ cb�_I`� vc 1w\ y 8 ''''' ^�V 4 100 YEAR FLOOD ZONECC \ 0 40' 80' r TYPE AE co c\I(o' • I \ r - r m / SCALE: 1" = 40' M 1 1 co I ' • \ w H i Z 6\ \ \ `N- \ \, / . \/ - ' • TROUT CREEK CULVERT \ CINO 6�`�� 1 — i" / UNDER PIONEER TRAIL. SEZ, SEE O ~ r- -- — � TROUT CREEK IS A (111 r-- NOTE 9 TYP PERENNIAL STREAM. ( ) \ (ZI-4 \ \ \ / � \ � � �� n , — — — �� APPROXIMATE LIMITS OF I//f , ` j - — T ,N \ m I COUNTY ROW (TYP) — — WATERLINE TRENCH/ I ADHERE TO TRAFFIC ,__,__.: u/ 1 �� 1 / — — CONSTR1NIMITS (TYP ) CONTROL PLANS & •/ L _ SECURE OPEN \ �- _ _.N. ; _ _ _ _ _ _ i EXCAVATIONS PER pi.- \� i _ �� - - - - — \ - - - � _ - - - DETAIL7, SHEET3.7 — �it - - - - - _ \ 1 \\\ 1 __ ussaiiiir___. CD - � PIONEER T► �2g2 �, N M. \ 82+00 IL \' 3+00 84+00 h2g 85+00� 2g 2g 6�9) _M \ _ �� \ \ .N.N:Lr,..rr,.:r,,rr,...:r,:rrrr,•.v.ww.u.ar,.w.we eeeeerrre�ae.•.ere.weerie e.•er.•.•.e•.•.•.e•e•••••••••••..... .q.....,,,,,A ..y.,,,,v4............... \ \ \\..\\, _ EST � _ ^ '' ---- --------- --------- -------------------e__......... ............................... ..•..••••••r•w.rc•.•cccccccccu.uuuu•u•uaarcw.�i:::.iS°irddciiii•.°i•...i•...-.---- • M N ----:::::,... . . . .. ,.. . � .:. . ..: . -,:: _ . _ — N DATE. N 2026 41 C\-‘51.75.5... ..tt. 1 . r / ;:::,�r,•' '' �' '3.- / 77\7.\:\\\ �- .F _ „ , .>,v. 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LTS L / STORMWATER SAMPLING '•wi---77, 6 O 9 ' \ PROTECT EXISTING GUARDRAIL \ / / i ice; — G (YJ 62 _ - _ LOCATION \ m. / / / i / k�.i • J �m \ -� S- �'�''�,; �\ `30� 0____ (,) _ — r — ' •,, THROUGHOUT CONSTRUCTION co , taiih.iimit. \ / l 7 , / , , i , i / 7 .— 2� \� \. \ \ \ �V DESIGN: ALM/JA , . 1. , I '....441.<2 \ AS BUILT: ( if _ — ' _- 10' NON-VEHICULAR ( /, // /, // / / // // / • 1/ / / \. , A I \„ \ \ `� \\ •j i.-p-- --7----,1 ' �! ,• ACCESS EASEMENT I — 3 6 1� / ( / / / / I i�\\ �3051 KOKANEE TRAIL \ \ � � ` .ram —�a\ \ . \_ 60F8 SHEETS L CATTLEMANS TRAIL LUMOS / 2432 CATTLEMANS TRAIL "/ .. `._._,.. - "'l 3200 DOUGLAS BOULEVARD,SUITE 320 PROPERTY LINE 2438 CATTLEMANS TRAIL 2442 CATTLEMANS • (/ F--- TEOL:279.2308336 CALIFORNIA TYP / / TRAIL _ ¢ I WWW.LUMOSINC.COM (TYP) • • i l / I INFO@LUMOSINC.COM SEZ, SEE NOTE 9 (TYP) / 1 ©LUMOS&ASSOCIATES,INC.:THIS DRAWING IS �"� i.��- I THE PROPERTY OF LUMOS&ASSOCIATES,INC.. I I USE OR REPRODUCTION OF THIS DRAWING,INl WHOLE OR IN PART,WITHOUT THE WRITTEN • 2454 CATTLEMA S PERMISSION OFLUMOS&ASSOCIATES,INC.ISSTRICTLY PROHIBITED.THIS DRAWING IS NOT � /zit � _ TRAIL TO BE USED FOR ANY PROJECT OTHER THAN p THE PROJECT FOR WHICH IT WAS PREPARED. u / :,::a / / �� APPROXIMATE LIMITS OF ' / -_Z/ , _ WATERLINE TRENCH/ ` I 14.9 / co //r, / �� - CONSTRUCTION LIMITS (TYP.) I ADHERE TO TRAFFIC • I �, CONTROL PLANS & :{ 7 Sr / / - •— / / • / / - �,/ / _ \ - • I / SECURE OPEN �c8' t� , sP v / / • / `� / - ��' EXCAVATIONS PER z w `,Q ,�i1 � / i / / � � �'� /� - - DETAIL7, SHEET3.7 dO1Sy �_ � � �_ - — _ o — / � / / / — — — _� — —. � '�: — .��— _ - �� �a � � .�0,� / / / / — — W W yy 'S�F� .:.• .:•: ....:... .-,.. • SS • • — i -� / 0. ' ti ,.i,- -� N J Q S2 u) • J -Y/ .--- ------ W 1 \ / �, 5_ 3 '� 6304 PIONEER TRAI _ -630 6 0_ o 94+00 - 61 \ ..., O. 6 FN0 96........................•..........e•..•r.•o.❖.❖00000000.•.•.•.•.tt.❖.•o.❖.•s❖s❖st❖.❖t❖.t❖s❖s❖.❖.❖.❖.❖.❖.❖.•..❖.❖.❖.❖oo. . .000:.....•.•.•o.•oo.•o,•.•.•.•.•.•.•.•.•o.•o.❖ss.,.•................_ _ 6 O W W W }.., .T!..,..._.�..�......•.:....y..�.,.�.�.,.�.,.,.p s❖.❖�•.LLL1•.gp.....q...96+?. � Co 0 2:: / �/ / — / �� 24P_ ' � i \ S� .r i �. 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COIR LOGS ALONG TRENCH ARE SHOWN CONCEPTUALLY AND SHALL BE INSTALLED : 0, FILTER FABRIC FENCING Z L.T. ., N PER DETAIL 5, 3.8, DOWNHILL OF TRENCH, WITH THE SPOIL PILE UPHILL FROM (SILT FENCE) 3.7 TRENCH IN THE AREA OF WORK. 3. FOR ALL SOILS THAT WILL REMAIN INACTIVE FOR MORE THAT 14 DAYS, A WOOD DRAIN INLET PROTECTION 1 ~ FIBER MULCH AND TACKIFIER SHALL BE APPLIED. THE APPLICATION RATE SHALL BE 3 7 1--d ( \ SPECIFIED PER THE MANUFACTURER. •:•:I O v 4. VISIBLE SEDIMENT TRACKING SHALL BE SWEPT OR VACUUMED ON A DAILY BASIS. REVEGETATION PER TRPA I--�••I r 5. ALL VEGETATION OUTSIDE OF THE WATERLINE TRENCH SHALL BE PRESERVED TO .•••••••••••• BMP HANDBOOK W , O TO THE EXTENT POSSIBLE. 4 6. NO FUELING, CLEANING OR MAINTENANCE OF VEHICLES SHALL BE PERFORMED — x — TREE PROTECTIVE FENCING Mlir ONSITE UNLESS VEHICLE IS UNABLE TO BE MOVED. O O 7. NftETA7, sHEET3J NON-STORMWATER DISCHARGE IS AUTHORIZED X TREE REMOVAL 04 8. A OPEN EXCAVATIONS SHALL BE SECURED PER CD 9. CONTRACTOR SHALL EXPECT SHALLOW GROUNDWATER WILL BE ENCOUNTERED FLOW LINE O WITHIN 5 FT BELOW GROUND SURFACE IN SEZ ZONES. DEWATERING PER SPECIFICATIONS REQUIRED. DIRECTION OF SURFACE ~ rz4 O FLOW W rZ4W CA W � W � Z C� O0-4 DATE: JAN 2026 SCALE: AS SHOWN DRAWN: LTS DESIGN: ALM/JA AS BUILT: 3 . 7 70F8 SHEETS EMBEDDING DETAILil i L .iki IRON T-POST 12" BIO-WATTLE _ �_ AFL LIMOS OR WOOD POST ..I 1"X1"X24" OR 1"X1"X36" � F WOODEN STAKES PLACED fF F m 3200 DOUGLAS BOULEVARD,SUITE 320 FILTER FABRIC ATTACHED AT 4' ON CENTERA. ���+ „„ ROSEVILLE,CALIFORNIA95661 m'�� TEL 279.230.8336 SECURELY TO UPSLOPE SIDE OF POST WWW.LUMOSINC.COM 41, i 1 , F F M N 1 ° F� INFO@LUMOSINC.COM STACK GRAVEL BAGS TIGHTLY AROUND DROP it II _1t� ;F � _ - � ©LUMosaAssoclATEs,wc.:rHisDRAwINGIs WRAP FABRIC UNDER BURY TOE OF FILTER = „ „ �`, _--. 1 THE PROPERTY OFLUMOSB ASSOCIATES,INC .. INLET ABUTTING CURB AND WEIGHT DOWN FABRIC U �. USE OR REPRODUCTION OF THISDRAWING,IN EXTENDED BEYOND THE GRATE 1"X LUMBER AND FABRIC IN 6"x6" TRENCH w PART, RAMSET TO AC ON UPHILL SIDE ` F w w F WHOLE OR OF WITHOUT THE WRITTEN aF:4'-' �� "` V PERMISSION OF LUMOS&ASSOCIATES,INC.IS mr ,,,, I a ....w ' I— d F �' TO BI E USED Y R OR ANY PROJECT HIBITED THIS TUHER THAN ING IS OT :� p 'F ,• � II WOOD2x12' PLACE NON WOVEN GEOTEXTILE FABRIC THE PROJECT FOR WHICH IT WAS PREPARED . BENEATH GRATE AND EXTEND A MINIMUM ///////�!/l G!/l//�////// ■ v MINIMUM TALL OF 18" FROM EDGE OF GRATE ON ALL SIDES. °%`o``o` °O %%% z � 1- 18" Q I ■ I) I c.) o Ill IlihII �� �. 0 .MIN ANCHORING DETAIL ' 1 ' i '' Ills I mol �, , �' o Z Q it II �II�II I y 11�iil !Iam V �V�• alum 'duir in w �� .: r a • �' • ' • s • FENCE IN PAVEMENT SECTION FENCE IN NATIVE SOIL 1111MI am �lu�lI r•1"X1"X24" OR 1"X1"X36" I • �: ����/ r - •*4 • •S. .4 . '• * WOODEN STAKES PLACED AT 2' TO � ` 1 1 • a, ��" d • 4' ON CENTER DEPENDING ON ! I 1 7 -1 '; `) 44 ''',;' `:•:'' '`y,• • • • SLOPE AND SOIL CONDITIONS 48" TALL METAL m • STAKES @ 6 OC W/WELDED . �`' • WIRE FABRIC. DRAPE FILTER i-`••== FENCE POSTS (TYP) 11 0 r • • a �.: FABRIC OVER FENCE AND 12" BIO-WATTLE _ p • • . • ,•' • • TIE WITH TIE WIRES. •.••" co • • •� h INCORRECT CORRECT Q i1 = o Q 4 ANCHOR TRENCH 4" DEEP � _':':':'- " O0 PLACE FILTER FABRIC IN •III'""ii�li 'i ii41l l il! '.=iii \4._ WOOD 2x. MAINTAIN ,' EXCAVATED 6"x6" =;ii i__:_::: liilll_.:—:: Ii li_ i n .el .,1 TRENCH O N UPHILL SIDE ujIII�IIII IILIpritLsi liiI IlL iu iiiEsi 3 SPACING MIN. ::en„pn�nnl9lil�ii��jiii>��i�ii�!i!�hlij�ii�ijii�lli�ii�!iiil!9 •.C . 0 0 AND THEN B A C K F I L L _ _ i��!I1'"::= II�III .�::: nilii nilil�!..—:::—nilii l: % a — __i=l wiii!!i!in��! iii!!i!r�n��!uiii!!i!r�n��! iii!!i!r�n��!uiii!!i!rn��! iii!!iI= ` 2s. i�IlL.11it n�.!!Igi ii III�IIL_giiI IrinLl•1iii IirL9i!ii irigiii�irr6. % CV -.. iiuiiilliliaiiL!I���IIIr�nL�lu i�ijIII!III l IIIIPIII!III I IIIIPIIL�I��nI nL�Iu I�III�n1!IIIIln�' i' 11.11,1 �..- .IIIre .III VI .III nni!:._niiiwll1610 �1611 n�mlIII' i ll'� :119I�i II�IIIlIII'�i ll'� :1190 SECTIONLiiiiii llwmlIII''�OL�ium iliiii Ilwm iliiii: lwm il°1�iR i�ii�� i� lii� iiiaia:liikigil.. iii !iiiwml:: iii1 PIIil.. ii wiIIi:'=:: III�IIIIPIIL uIII�IIIIaIIL..�III�IIIo ,�I nji ._... 111111_ 111Iii- NOTES: iiilii! II`"�iiiilliiiii��I::- ihiiiem._:_ NOTE: `�=°- 1) PLACING ANY MATERIAL -TEMPORARY OR OTHERWISE-WITHIN PROTECTIVE FENCING OR ENTERING i,//'//� PROTECTION AREAS MAY RESULT IN A FINE. (TRPA SEC. 65.2.1 I AND J) ��� 1) SEDIMENT CONTROL BARRIERS USED ON SLOPES, AS CHECK DAMS OR AS SEDIMENT TRAPS E—, SHALL BE BIO-WATTLES AS DISTRIBUTED BY BON-TERRA AMERICA INC. OR APPROVED EQUAL 2) FORTY EIGHT INCH (48") ORANGE PLASTIC FENCING TYPICAL, METAL OR WIRE MESH FENCING MAY U Z NOTE: AND INSTALLED AS RECOMMENDED BY THE MANUFACTURE. BE REQUIRED PER TRPA. W s 1) PLACE FENCING SUCH THAT STORM RUNOFF CANNOT PASS UNDER OR AROUND. 3) ACTIVITY WITHIN THE DRIP LINE OF A TREE MUST BE AUTHORIZED BY AND DISCUSSED WITH TRPA IN O 1, THE FIELD BEFORE IT MAY OCCUR. IF WORK OR TRAFFIC HAS BEEN APPROVED WITHIN THE DRIP ao LINE AREA, THE PLACEMENT OF WOOD 2X MATERIAL IS REQUIRED n/ 1 DRAINAGE INLET SEDIMENT PROTECTION 2 FILTER FABRIC FENCING 3 COIR LOG PLACEMENT 4 VEGETATION PROTECTION FENCING I--I• O W nq z EXCAVATION OPENING, 0 "TEE" POST, 5'X8' SHOWN I--�� 4 PER EXCAVATION, W U 5' TALL MIN WWWWWWOOOM H Z 0 LOCATE SPOIL PILE UPHILL I C OF OPEN TRENCH SECTION ORANGE CONSTRUCTION FENCING, 4' TALL MIN I 1 �` (MIN) 1� {••I-I STAKES @ 6' OC W/48" TALL 1 \\��,,� PLASTIC IOR ORANGE PLASTIC MESH OR ` ` ✓%�%��� ` IMPERVIOUS W EOP ��` EOP ��� EOP WELDED WIRE FABRIC. I , , ` -� �,�� � � •'•' COVERING r 1 ° o o • —1 o o°o° a4 . IN"rJ�f�rr=Jf�rJ=fI '• .� 000°O°OO•.' .O O O O O°O• O p0 O w 0111.- W (24 8'X4' 1" MIN PLYWOOD SHEET, NIP W 2 SHEETS TYPICAL PER K\� LOCATE WITHIN �� 2' MIN EXCAVATION ��\s\\ / PROPERTY1 ZLI r O-•0 WEIGHTED FIBER ROLL OR 0 V NEW PIPELINE Q O O NON-WEIGHTED FIBER ROLL FLAP FOR ACCESS, rT~ WITH GRAVEL BAGS AT END 11111110 WEIGH-DOWN WHEN ^ w 11111111111...--- AND EVERY 36" NOT IN USE (OVERLAP F-I-� 42" MIN TALL TRAFFIC CONE, 10" MIN) -) 010 !!!!!! 2 MIN PER EXCAVATION / PLACE ON STREET SIDE - TYPICAL PROTECTED EXCAVATION EOP /// EOP //I EOP ---------777N\77 / z OPEN TRENCH EROSION CONTROL FENCE SECTION NOTES: OR COIR LOG 1) ALL EXCAVATIONS SHALL BE COVERED AND PROTECTED AT THE END OF EACH WORK DAY. NOTES: DATE: JAN 2026 NOTE: 2) EXCAVATIONS IN PAVEMENT OR PARTIALLY IN PAVEMENT SHALL BE COVERED WITH A STEEL 1. LOCATE STOCK AND/OR SPOIL PILES AWAY FROM DRAINAGE COURSES, DRAIN INLETS OR TRENCH PLATE WITH A MINIMUM OF TWO TRAFFIC CONES 42" TALL. EXCAVATION IN THE CONCENTRATED FLOWS OF STORMWATER. SCALE: AS SHOWN NOTE: ROADWAY SHALL BE COVERED WITH A TRENCH PLATE AND THE EDGES SHALL BE COLD MIXED. 2. ALL STOCK AND/OR SPOIL PILE PERIMETERS SHALL BE PROTECTED WITH TEMPORARY LINEAR SEDIMENT 1) IF FILTER FABRIC FENCING IS USED IN LIEU OF SITE PROTECTION FENCING (ORANGE BARRIERS. 1) RELOCATE EROSION CONTROL FENCE/COIR LOG AS CONSTRUCTION PROGRESSES FENCING), INSTALL PER FILTER FABRIC FENCING DETAIL. SEE GENERAL NOTE#12. 3. COVER ALL STOCK AND/OR SPOIL PILES WITH 6 MM PLASTIC, CANVAS TARP OR IMPERVIOUS COVER TO DRAWN: LTS 2) WHEN NOT ACTIVELY WORKING WITH STOCKPILED MATERIAL, ALL STOCKPILED MATERIAL PREVENT WIND AND RAIN EROSION. EVENLY SPACE WEIGHTS (GRAVEL BAGS)ON COVER TO KEEP IN SHALL BE COVERED AND PROTECTED TO PREVENT WIND TRANSPORT OR DISCHARGE FROM PLACE DURING WIND. DESIGN: ALM/JA RAIN EVENTS PER STOCKPILE MANAGEMENT DETAIL. 4. CONDUCT REGULAR INSPECTIONS OF STOCK AND/OR SPOIL PILES DURING AND AFTER RAIN EVENTS 5. VERY LARGE STOCK AND/OR SPOIL PILES MAY REQUIRE SILT FENCE IN LIEU OF FIBER ROLLS. 6. REMOVE SPOIL PILES FROM CONSTRUCTION SITE AS SOON AS POSSIBLE. AS BUILT: 7. STOCK/SPOIL PILES MUST BE STORED WITHIN THE APPROVED STAGING AREA. 3 .8 80F8 5 TYPICAL OPEN TRENCH SECTION 6 SITE PROTECTION FENCING 7 SECURE OPEN EXCAVATIONS 8 STOCKPILE MANAGEMENT SHEETS Appendix B;Permit Registration Documents 2026 Pioneer Trail Waterline Project 52 February 13, 2026 Appendix C;SWPPP Amendment Certifications 2026 Pioneer Trail Waterline Project 53 February 13, 2026 SWPPP Amendment No. Project Name: Project Number: Qualified SWPPP Developer's Certification of the Stormwater Pollution Prevention Plan Amendment "This Stormwater Pollution Prevention Plan and attachments were prepared under my direction to meet the requirements of the General Waste Discharge Requirements and National Pollution Discharge Elimination System General Permit for Storm Water Discharges Associated with Construction Activity in the Lake Tahoe Hydrologic Unit,Counties of Alpine,El Dorado,and Placer (Order No. R6T-2016-0010,NPDES No. CAG616002. I certify that I am a Qualified SWPPP Developer in good standing as of the date signed below." QSD's Signature Date QSD Name QSD Certificate Number Title and Affiliation Telephone Address Email 2026 Pioneer Trail Waterline Project 54 February 13,2026 Log of Updated PRDs The General Permit allows for the reduction or increase of the total acreage covered under the General Permit when a portion of the project is complete and/or conditions for termination of coverage have been met; when ownership of a portion of the project is purchased by a different entity; or when new acreage is added to the project. Modified PRDs shall be filed electronically within 30 days of a reduction or increase in total disturbed area if a change in permit covered acreage is to be sought. The SWPPP shall be modified appropriately, with revisions and amendments recorded in Appendix B. Updated PRDs submitted electronically via SMARTS can be found in this Appendix. This appendix includes all of the following updated PRDs (check all that apply): ❑ Revised Notice of Intent(NOI); ❑ Revised Site Map; New landowner's information (name, address, phone number, email address); and ❑ New signed certification statement. Legally Responsible Person Signature of Legally Responsible Person or Date Approved Signatory Name of Legally Responsible Person or Approved Telephone Number Signatory 2026 Pioneer Trail Waterline Project 55 February 13,2026 Appendix D:Construction Schedule 2026 Pioneer Trail Waterline Project 56 February 13, 2026 Appendix E. CASQA Storm water BMP Handbook Portal. Construction Fact Sheets 2026 Pioneer Trail Waterline Project 57 February 13, 2026 Street Sweeping and Vacuuming SE-7 Categories EC Erosion Control SE Sediment Control x❑ TC Tracking Control WE Wind Erosion Control 31„ r NS Non-Stormwater I I I I I tm I I I,I I I, I Management Control rf Waste Management and i % 1 WM Materials Pollution Control A - n = 0 E. Legend: Q Primary Objective ❑k Secondary Objective Targeted Constituents Description and Purpose Sediment Street sweeping and vacuuming includes use of self-propelled Nutrients and walk-behind equipment to remove sediment from streets Trash and roadways and to clean paved surfaces in preparation for Metals final paving. Sweeping and vacuuming prevents sediment from the project site from entering storm drains or receiving waters. Bacteria Oil and Grease Suitable Applications Organics Sweeping and vacuuming are suitable anywhere sediment is tracked from the project site onto public or private paved Potential Alternatives streets and roads, typically at points of egress. Sweeping and vacuuming are also applicable during preparation of paved None surfaces for final paving. Limitations • Sweeping and vacuuming may not be effective when sediment is wet or when tracked soil is caked(caked soil If eet any way,the CASQA ubscriber modifies this fact may need to be scraped loose). sheet in name/logo and footer below must be removed from each page and not • Sweeping may be less effective for fine particle soils (i.e., appear on the modified version. clay). Implementation • Controlling the number of points where vehicles can leave the site will allow sweeping and vacuuming efforts to be focused and perhaps save money. • Inspect potential sediment tracking locations daily. CASQA c.�i.IFORNI STORyTWYvTFR December 2019 CASQA BMP Handbook 1 of 2 Construction www.casqa.org Street Sweeping and Vacuuming SE-7 ■ Visible sediment tracking should be swept or vacuumed on a daily basis. ■ Do not use kick brooms or sweeper attachments. These tend to spread the dirt rather than remove it. ■ If not mixed with debris or trash, consider incorporating the removed sediment back into the project Costs Rental rates for self-propelled sweepers vary depending on hopper size and duration of rental. Expect rental rates from $ 65o/day to $2,5oo/days, plus operator costs. Hourly production rates vary with the amount of area to be swept and amount of sediment. Match the hopper size to the area and expect sediment load to minimize time spent dumping. Inspection and Maintenance ■ Inspect BMPs in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. ■ When actively in use, points of ingress and egress must be inspected daily. ■ When tracked or spilled sediment is observed outside the construction limits, it must be removed at least daily. More frequent removal, even continuous removal, may be required in some jurisdictions. ■ Be careful not to sweep up any unknown substance or any object that may be potentially hazardous. ■ Adjust brooms frequently; maximize efficiency of sweeping operations. ■ After sweeping is finished,properly dispose of sweeper wastes at an approved dumpsite. References Stormwater Quality Handbooks -Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation(Caltrans),November 2000. Based on contractor query conducted by Tetra Tech,Inc.November 2o16. December 2019 CASQA BMP Handbook 2 of 2 Construction www.casqa.org Storm Drain Inlet Protection SE- 10 Categories EC Erosion Control SE Sediment ControlTC Tracking Control !!!'IPIJ � WE Wind Erosion Control ' I Non-Stormwater �► NS Management Control 1� / WM Waste Management and Materials Pollution Control ilL Legend: Primary Category 0 Secondary Category Targeted Constituents Description and Purpose Sediment 0 Storm drain inlet protection consists of a sediment filter or an Nutrients impounding area in, around or upstream of a storm drain, drop Trash x❑ inlet, or curb inlet. Storm drain inlet protection measures Metals temporarily pond runoff before it enters the storm drain, allowing sediment to settle. Some filter configurations also Bacteria remove sediment by filtering,but usually the ponding action Oil and Grease results in the greatest sediment reduction. Temporary Organics geotextile storm drain inserts attach underneath storm drain grates to capture and filter storm water. Potential Alternatives Suitable Applications SE-1 Silt Fence • Every storm drain inlet receiving runoff from unstabilized SE-5 Fiber Rolls or otherwise active work areas should be protected. Inlet protection should be used in conjunction with other erosion SE-6 Gravel Bag Berm and sediment controls to prevent sediment-laden SE-8 Sandbag Barrier stormwater and non-stormwater discharges from entering SE-14 Biofilter Bags the storm drain system. SE-13 Compost Socks and Berms Limitations If User/Subscriber modifies this fact • Drainage area should not exceed 1 acre. sheet in any way,the CASQA name/logo and footer below must be • In general straw bales should not be used as inlet removed from each page and not protection. appear on the modified version. • Requires an adequate area for water to pond without encroaching into portions of the roadway subject to traffic. • Sediment removal may be inadequate to prevent sediment discharges in high flow conditions or if runoff is heavily CASQA sediment laden. If high flow conditions are expected,use December 2019 CASQA BMP Handbook 1 of 10 Construction www.casqa.org Storm Drain Inlet Protection SE-10 other onsite sediment trapping techniques in conjunction with inlet protection. • Frequent maintenance is required. • Limit drainage area to 1 acre maximum. For drainage areas larger than 1 acre,runoff should be routed to a sediment-trapping device designed for larger flows. See BMPs SE-2, Sediment Basin, and SE-3, Sediment Traps. • Excavated drop inlet sediment traps are appropriate where relatively heavy flows are expected, and overflow capability is needed. Implementation General Inlet control measures presented in this handbook should not be used for inlets draining more than one acre. Runoff from larger disturbed areas should be first routed through SE-2, Sediment Basin or SE-3, Sediment Trap and/or used in conjunction with other drainage control, erosion control, and sediment control BMPs to protect the site. Different types of inlet protection are appropriate for different applications depending on site conditions and the type of inlet. Alternative methods are available in addition to the methods described/shown herein such as prefabricated inlet insert devices, or gutter protection devices. Design and Layout Identify existing and planned storm drain inlets that have the potential to receive sediment- laden surface runoff. Determine if storm drain inlet protection is needed and which method to use. • The key to successful and safe use of storm drain inlet protection devices is to know where runoff that is directed toward the inlet to be protected will pond or be diverted as a result of installing the protection device. - Determine the acceptable location and extent of ponding in the vicinity of the drain inlet. The acceptable location and extent of ponding will influence the type and design of the storm drain inlet protection device. - Determine the extent of potential runoff diversion caused by the storm drain inlet protection device. Runoff ponded by inlet protection devices may flow around the device and towards the next downstream inlet. In some cases,this is acceptable; in other cases, serious erosion or downstream property damage can be caused by these diversions. The possibility of runoff diversions will influence whether or not storm drain inlet protection is suitable; and,if suitable,the type and design of the device. • The location and extent of ponding, and the extent of diversion, can usually be controlled through appropriate placement of the inlet protection device. In some cases, moving the inlet protection device a short distance upstream of the actual inlet can provide more efficient sediment control,limit ponding to desired areas, and prevent or control diversions. • Seven types of inlet protection are presented below. However, it is recognized that other effective methods and proprietary devices exist and may be selected. December 2019 CASQA BMP Handbook 2 of 10 Construction www.casqa.org Storm Drain Inlet Protection SE- 10 - Silt Fence: Appropriate for drainage basins with less than a 5% slope, sheet flows, and flows under o.5 cfs. - Excavated Drop Inlet Sediment Trap: An excavated area around the inlet to trap sediment(SE-3). - Gravel bag barrier: Used to create a small sediment trap upstream of inlets on sloped, paved streets. Appropriate for sheet flow or when concentrated flow may exceed o.5 cfs, and where overtopping is required to prevent flooding. - Block and Gravel Filter: Appropriate for flows greater than o.5 cfs. - Temporary Geotextile Storm drain Inserts: Different products provide different features. Refer to manufacturer details for targeted pollutants and additional features. - Biofilter Bag Barrier: Used to create a small retention area upstream of inlets and can be located on pavement or soil. Biofilter bags slowly filter runoff allowing sediment to settle out. Appropriate for flows under o.5 cfs. - Compost Socks: Allow filtered run-off to pass through the compost while retaining sediment and potentially other pollutants (SE-13). Appropriate for flows under i.o cfs. ■ Select the appropriate type of inlet protection and design as referred to or as described in this fact sheet. ■ Provide area around the inlet for water to pond without flooding structures and property. ■ Grates and spaces around all inlets should be sealed to prevent seepage of sediment-laden water. ■ Excavate sediment sumps (where needed) 1 to 2 ft with 2:1 side slopes around the inlet. Installation ■ DI Protection Type 1 -Silt Fence- Similar to constructing a silt fence; see BMP SE-1, Silt Fence. Do not place fabric underneath the inlet grate since the collected sediment may fall into the drain inlet when the fabric is removed or replaced and water flow through the grate will be blocked resulting in flooding. See typical Type 1 installation details at the end of this fact sheet. 1. Excavate a trench approximately 6 in.wide and 6 in. deep along the line of the silt fence inlet protection device. 2. Place 2 in.by 2 in.wooden stakes around the perimeter of the inlet a maximum of 3 ft apart and drive them at least i8 in. into the ground or 12 in.below the bottom of the trench. The stakes should be at least 48 in. 3. Lay fabric along bottom of trench, up side of trench, and then up stakes. See SE-1, Silt Fence, for details. The maximum silt fence height around the inlet is 24 in. 4. Staple the filter fabric(for materials and specifications, see SE-1, Silt Fence)to wooden stakes. Use heavy-duty wire staples at least 1 in. in length. December 2019 CASQA BMP Handbook 3 of 10 Construction www.casqa.org Storm Drain Inlet Protection SE- 10 5. Backfill the trench with gravel or compacted earth all the way around. ■ DI Protection Type 2 -Excavated Drop Inlet Sediment Trap - Install filter fabric fence in accordance with DI Protection Type 1. Size excavated trap to provide a minimum storage capacity calculated at the rate 67 yd3/acre of drainage area. See typical Type 2 installation details at the end of this fact sheet. ■ DI Protection Type 3 - Gravel bag - Flow from a severe storm should not overtop the curb. In areas of high clay and silts, use filter fabric and gravel as additional filter media. Construct gravel bags in accordance with SE-6, Gravel Bag Berm. Gravel bags should be used due to their high permeability. See typical Type 3 installation details at the end of this fact sheet. 1. Construct on gently sloping street. 2. Leave room upstream of barrier for water to pond and sediment to settle. 3. Place several layers of gravel bags —overlapping the bags and packing them tightly together. 4. Leave gap of one bag on the top row to serve as a spillway. Flow from a severe storm (e.g., io-year storm) should not overtop the curb. ■ DI Protection Type 4 —Block and Gravel Filter- Block and gravel filters are suitable for curb inlets commonly used in residential, commercial, and industrial construction. See typical Type 4 installation details at the end of this fact sheet. i. Place hardware cloth or comparable wire mesh with o.5 in. openings over the drop inlet so that the wire extends a minimum of 1 ft beyond each side of the inlet structure. If more than one strip is necessary,overlap the strips. Place woven geotextile over the wire mesh. 2. Place concrete blocks lengthwise on their sides in a single row around the perimeter of the inlet, so that the open ends face outward, not upward. The ends of adjacent blocks should abut. The height of the barrier can be varied, depending on design needs,by stacking combinations of blocks that are 4 in., 8 in., and 12 in.wide. The row of blocks should be at least 12 in.but no greater than 24 in.high. 3. Place wire mesh over the outside vertical face (open end) of the concrete blocks to prevent stone from being washed through the blocks. Use hardware cloth or comparable wire mesh with o.5 in. opening. 4. Pile washed stone against the wire mesh to the top of the blocks. Use o.75 to 3 in. ■ DI Protection Type 5— Temporary Geotextile Insert(proprietary) —Many types of temporary inserts are available. Most inserts fit underneath the grate of a drop inlet or inside of a curb inlet and are fastened to the outside of the grate or curb. These inserts are removable, and many can be cleaned and reused. Installation of these inserts differs between manufacturers. Please refer to manufacturer instruction for installation of proprietary devices. December 2019 CASQA BMP Handbook 4 of 10 Construction www.casqa.org Storm Drain Inlet Protection SE-10 • DI Protection Type 6 -Biofilter bags— Biofilter bags maybe used as a substitute for gravel bags in low-flow situations. Biofilter bags should conform to specifications detailed in SE-14, Biofilter bags. 1. Construct in a gently sloping area. 2. Biofilter bags should be placed around inlets to intercept runoff flows. 3. All bag joints should overlap by 6 in. 4. Leave room upstream for water to pond and for sediment to settle out. 5. Stake bags to the ground as described in the following detail. Stakes may be omitted if bags are placed on a paved surface. • DI Protection Type 7— Compost Socks—A compost sock can be assembled on site by filling a mesh sock(e.g.,with a pneumatic blower). Compost socks do not require special trenching compared to other sediment control methods (e.g., silt fence). Compost socks should conform to specification detailed in SE-13, Compost Socks and Berms. Costs • Average annual cost for installation and maintenance of DI Type 1-4 and 6 (one-year useful life)is $2Oo per inlet. • Temporary geotextile inserts are proprietary, and cost varies by region. These inserts can often be reused and may have greater than 1 year of use if maintained and kept undamaged. Average cost per insert ranges from $50-75 plus installation,but costs can exceed $ioo. This cost does not include maintenance. • See SE-13 for Compost Sock cost information. Inspection and Maintenance • BMPs must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. • Silt Fences. If the fabric becomes clogged,torn, or degrades,it should be replaced. Make sure the stakes are securely driven in the ground and are in good shape(i.e.,not bent, cracked,or splintered, and are reasonably perpendicular to the ground). Replace damaged stakes. At a minimum,remove the sediment behind the fabric fence when accumulation reaches one-third the height of the fence or barrier height. • Gravel Filters. If the gravel becomes clogged with sediment, it should be carefully removed from the inlet and either cleaned or replaced. Since cleaning gravel at a construction site maybe difficult, consider using the sediment-laden stone as fill material and put fresh stone around the inlet. Inspect bags for holes,gashes, and snags, and replace bags as needed. Check gravel bags for proper arrangement and displacement. December 2019 CASQA BMP Handbook 5 of 10 Construction www.casqa.org Storm Drain Inlet Protection SE- 10 • Sediment that accumulates in the BMP should be periodically removed in order to maintain BMP effectiveness. Sediment should be removed when the sediment accumulation reaches one-third of the barrier height. • Inspect and maintain temporary geotextile insert devices according to manufacturer's specifications. • Remove storm drain inlet protection once the drainage area is stabilized. - Clean and regrade area around the inlet and clean the inside of the storm drain inlet, as it should be free of sediment and debris at the time of final inspection. References Stormwater Quality Handbooks -Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation(Caltrans), March 2003. Stormwater Management Manual for The Puget Sound Basin,Washington State Department of Ecology, Public Review Draft, 1991. Erosion and Sediment Control Manual, Oregon Department of Environmental Quality, February 2005. December 2019 CASQA BMP Handbook 6 of 10 Construction www.casqa.org Storm Drain Inlet Protection SE-10 Silt Fence per SE-01 Geotextile Blanket x Drain inlet 24"± SECT ON A- A 6" n 1—x x x x overlapMi at ends of silt fence. Drain inlet k/L\ /1\ ® ®� —Geotextile Blanket x x Sheet flow Less than Silt Fence per SE-01 1 acre x x cz,/, x x x x PLAN 00, D DSOTECTION TYPE 1 NOT TO SCALE NOTES: 1. For use in areas where grading has been completed and final soil stabilization and seeding are pending. 2. Not applicable in paved areas. 3. Not applicable with concentrated flows. December 2019 CASQA BMP Handbook 7 of 10 Construction www.casqa.org Storm Drain Inlet Protection SE-10 Stabilize area and grade uniformly around perimeter x Geotextile X Blanket H Silt fence Per SE-01 X x 1: 1 slope 11 - 3 Min Drain inlet Iliplir4/‘- - 12" Min �iX�i�N i�i� 2 4" M a x Note: ✓k A/ Remove sediment 4' before reaching one-third full. Section A A Concentrated i Rock filter(use if flow flow is concentrated) 1—x xc x X-1 X r , X Edge of L I- -II sediment trap X j 1 Drain inlet i x i —1.- ._ Sheet flow gle- Geotextile X 1 X Blanket 1' L A —Silt fence Per SE 01 i X LJ x .O X X X x 0 cn O DI mOTECTION TYPE 2 '‘'\ NOT TO SCALE Notes 1. For use in cleared and grubbed and in graded areas. 2. Shape basin so that longest inflow area faces longest length of trap. 3. For concentrated flows, shape basin in 2: 1 ratio with length oriented towards direction of flow. December 2019 CASQA BMP Handbook 8 of 10 Construction www.casqa.org Storm Drain Inlet Protection SE-10 Inlet Edge of Pavement Flow ► _ Flow Spillway, 1—bag high Gravel baqs 2—bags high TYPICAL PROTECTION FOR INLET ON SUMP Edge of Pavement Inlet Flow Flow 40A01,41 Spillway, 1—bag high Gravel baqs 2—bags high TYPICAL PROTECTION FOR INLET ON GRADE NOTES: 1. Intended for short—term use. 2. Use to inhibit non—storm water flow. 3. Allow for proper maintenance and cleanup. 4. Bags must be removed after adjacent operation is completed 5. Not applicable in areas with high silts and clays without filter fabric. 6. Protection can be effective even if it is not immediately adjacent to the inlet provided that the inlet is protected from potential sources of pollution. ❑I PROTECTION TYPE 3 NOT TO SCALE December 2019 CASQA BMP Handbook 9 of 10 Construction www.casqa.org Storm Drain Inlet Protection SE-10 - - _ — Curb inlet �� J_ �� Ili 0 Ili 0 ` di -410Po O - Doi O - _- �---- it 0 i MINIM • 41 =i 4,4410) O_ _ O O� O� _ O_ O_ O O y^ 0 ���n� Dc t1D0 OO O O =� Concrete block laid lengthwise on sides @ perimeter of opening Hardware cloth or wire mesh Runoff with sediment Filtered water 7 Overflow �N \� /\i lall O , / i��� \\�\\Y\\ice�� �j / ° , \ Sediment a °/%i/. Hardware cloth - °�� wire mesh ° Curb inlet DI OTECTION TYP= 4 NOT TO SCALE December 2019 CASQA BMP Handbook 10 of 10 Construction www.casqa.org Stabilized Construction Entrance/ Exit TC- 1 Categories EC Erosion Control x❑ SE Sediment Control x❑ TC Tracking Control WE Wind Erosion Control Non-Stormwater ����, NS Management Control ur�l/ 111111ll - g T =uuuuouua J Waste Management and f, i D► Dz WM Materials Pollution Control Legend: Q Primary Objective ❑x Secondary Objective Targeted Constituents Description and Purpose Sediment Q A stabilized construction access is defined by a point of Nutrients entrance/exit to a construction site that is stabilized to reduce Trash the tracking of mud and dirt onto public roads by construction vehicles. Metals Bacteria Suitable Applications Oil and Grease Use at construction sites: Organics • Where dirt or mud can be tracked onto public roads. Potential Alternatives • Adjacent to water bodies. None • Where poor soils are encountered. • Where dust is a problem during dry weather conditions. If User/Subscriber modifies this fact Limitations sheet in any way,the CASQA • Entrances and exits require periodic top dressing with name/logo and footer below must be additional stones. removed from each page and not appear on the modified version. • This BMP should be used in conjunction with street sweeping on adjacent public right of way. • Entrances and exits should be constructed on level ground only. • Stabilized construction entrances are rather expensive to construct and when a wash rack is included, a sediment trap of some kind must also be provided to collect wash water CASQA runoff. l\I.IFUR\I A S roR\1wAi[R December 2019 CASQA BMP Handbook 1 of 6 Construction www.casqa.org Stabilized Construction Entrance/ Exit TC- 1 Implementation General A stabilized construction entrance is a pad of aggregate underlain with filter cloth located at any point where traffic will be entering or leaving a construction site to or from a public right of way, street, alley, sidewalk, or parking area. The purpose of a stabilized construction entrance is to reduce or eliminate the tracking of sediment onto public rights of way or streets. Reducing tracking of sediments and other pollutants onto paved roads helps prevent deposition of sediments into local storm drains and production of airborne dust. Where traffic will be entering or leaving the construction site, a stabilized construction entrance should be used. NPDES permits require that appropriate measures be implemented to prevent tracking of sediments onto paved roadways,where a significant source of sediments is derived from mud and dirt carried out from unpaved roads and construction sites. Stabilized construction entrances are moderately effective in removing sediment from equipment leaving a construction site. The entrance should be built on level ground. Advantages of the Stabilized Construction Entrance/Exit is that it does remove some sediment from equipment and serves to channel construction traffic in and out of the site at specified locations. Efficiency is greatly increased when a washing rack is included as part of a stabilized construction entrance/exit. Design and Layout • Construct on level ground where possible. • Select 3 to 6 in. diameter stones. • Use minimum depth of stones of 12 in. or as recommended by soils engineer. • Construct length of 5o ft or maximum site will allow, and io ft minimum width or to accommodate traffic. • Rumble racks constructed of steel panels with ridges and installed in the stabilized entrance/exit will help remove additional sediment and to keep adjacent streets clean. • Provide ample turning radii as part of the entrance. • Limit the points of entrance/exit to the construction site. • Limit speed of vehicles to control dust. • Properly grade each construction entrance/exit to prevent runoff from leaving the construction site. • Route runoff from stabilized entrances/exits through a sediment trapping device before discharge. • Design stabilized entrance/exit to support heaviest vehicles and equipment that will use it. December 2019 CASQA BMP Handbook 2 of 6 Construction www.casqa.org Stabilized Construction Entrance/ Exit TC- 1 • Select construction access stabilization(aggregate, asphaltic concrete, concrete)based on longevity,required performance, and site conditions. Do not use asphalt concrete(AC) grindings for stabilized construction access/roadway. • If aggregate is selected,place crushed aggregate over geotextile fabric to at least 12 in. depth, or place aggregate to a depth recommended by a geotechnical engineer. A crushed aggregate greater than 3 in.but smaller than 6 in. should be used. • Designate combination or single purpose entrances and exits to the construction site. • Require that all employees, subcontractors, and suppliers utilize the stabilized construction access. • Implement SE-7,Street Sweeping and Vacuuming, as needed. • All exit locations intended to be used for more than a two-week period should have stabilized construction entrance/exit BMPs. Inspection and Maintenance • Inspect and verify that activity—based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMPs are under way, inspect BMPs in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. • Inspect local roads adjacent to the site daily. Sweep or vacuum to remove visible accumulated sediment. • Remove aggregate,separate and dispose of sediment if construction entrance/exit is clogged with sediment. • Keep all temporary roadway ditches clear. • Check for damage and repair as needed. • Replace gravel material when surface voids are visible. • Remove all sediment deposited on paved roadways within 24 hours. • Remove gravel and filter fabric at completion of construction Costs Average annual cost for installation and maintenance may vary from $1,5oo to $6,ioo each, averaging $3,ioo per entrance. Costs will increase with addition of washing rack and sediment trap. With wash rack, costs range from $1,5oo - $7,7oo each, averaging $4,6Oo per entrance (All costs adjusted for inflation, 2016 dollars,by Tetra Tech Inc. References Manual of Standards of Erosion and Sediment Control Measures,Association of Bay Area Governments,May 1995. December 2019 CASQA BMP Handbook 3 of 6 Construction www.casqa.org Stabilized Construction Entrance/ Exit TC- 1 National Management Measures to Control Nonpoint Source Pollution from Urban Areas, USEPA Agency, 2002. Proposed Guidance Specifying Management Measures for Sources of Nonpoint Pollution in Coastal Waters,Work Group Working Paper, USEPA,April 1992. Stormwater Quality Handbooks Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans),November 2000. Stormwater Management of the Puget Sound Basin,Technical Manual, Publication #91-75, Washington State Department of Ecology, February 1992. Virginia Erosion and Sedimentation Control Handbook,Virginia Department of Conservation and Recreation, Division of Soil and Water Conservation, 1991. Guidance Specifying Management Measures for Nonpoint Pollution in Coastal Waters, EPA 84o-B-9-oo2, USEPA, Office of Water,Washington, DC, 1993. Water Quality Management Plan for the Lake Tahoe Region,Volume II, Handbook of Management Practices,Tahoe Regional Planning Agency,November 1988. December 2019 CASQA BMP Handbook 4 of 6 Construction www.casqa.org Stabilized Construction Entrance/ Exit TC- 1 Crushed aggregate greater than 3" but smaller than 6" Filter fabric Original o o o grade 12 " Min, unless otherwise specified by a soils engineer SECTION B—B NTS NOTE: _ct Construct sediment barrier — and channelize runoff to •R-- 4sc.‘ 61 sediment trapping device 3 ;ri rig• R B < •••,,. -...... ___} cc x•••,,z, ..•-'�.• oe, •►-4..-fir .;%: . .•t:'•-e,: "A..tip' ...t• • 10' min or o •� {{ a� •"" xx•. •. .-l•. . •. as required to .�� •!ie ,. � . ., .. .4 .. accomodate •I.,I6'Agli �r',7 jait,;lf..i • •. :f. 4;Fi�4f anticipated "' • '•'' 1 f• traffic, whichever o p.�i•;••••!%1 04!"• i,!''•�^�,,0.� 1.�A^q is greater ZI � U7 w • Temporary pipe culvert B 7 • as needed 50'Tyaical (1) Length should be extended to 12 times the diameter of the largest construction vehicle tire. Match (2) On small sites length should be the maximum allowed by site. Existing Grade PLAN NTS December 2019 CASQA BMP Handbook 5 of 6 Construction www.casqa.org Stabilized Construction Entrance/ Exit TC- 1 Crushed aggregate greater than 3" but smaller than 6 Filter fabric Original grade 12" Min, unless otherwise specified by a soils engineer SECTION B—B NTS Crushed aggregate greater than 3" but smaller than 6". Corrugated steel panels Original _rattiefmtew.,,twirclard-ng,grade 12" Min, unless otherwise specified by a soils engineer Filter fabric SECTION A—A NOT TO SCALE NOTE: Construct sediment barrier Sediment trapping and channelize runoff to PP g sediment trapping device device '''''''''''''''--..,; / \ Le �C � 1 r o >-I 9- <I 0';`L� Corrugated steel panels <I ?�vc,ti A A —.-B ct 01 /II �,�} 10' min or :1 die..l"r�si.' a lid: r• 'f'�.,� +:f as required to >j 'W+ •'aft+%1 � :������•���c accomodate Q' i:•'�•����..'s`� .,1 a:�•%.,. . anticipated a_, •,ISM i`":„ F�. .. .we_xj'.'r"•. cD • ,•fp•gb.16• ,•,,• •.: 1-,• ,"( traffic, whichever ,., is reater. co' —►B Xi • L w, 24'. I ( or max allowed by site i 50'Typical �+ (1) Length should be extended to 12 times the diameter of the largest construction vehicle tire. Match (2) On small sites length should be the maximum allowed by site. Existing PLAN Grade NTS December 2019 CASQA BMP Handbook 6 of 6 Construction www.casqa.org Wind Erosion Control WE- 1 Categories EC Erosion Control SE Sediment Control ❑x TC Tracking Control Ale WE Wind Erosion Control NS Non-Stormwater Management Control WM Waste Management and r Materials Pollution Control I1® Legend: dl a U Q Primary Category / i 0 Secondary Category Targeted Constituents Description and Purpose Sediment Wind erosion or dust control consists of applying water or other Nutrients chemical dust suppressants as necessary to prevent or alleviate Trash dust nuisance generated by construction activities. Covering Metals small stockpiles or areas is an alternative to applying water or other dust palliatives. Bacteria Oil and Grease California's Mediterranean climate,with a short"wet"season Organics and a typically long,hot"dry"season, allows the soils to thoroughly dry out. During the dry season, construction activities are at their peak, and disturbed and exposed areas are Potential Alternatives increasingly subject to wind erosion, sediment tracking, and EC-5 Soil Binders dust generated by construction equipment. Site conditions and climate can make dust control more of an erosion problem than water-based erosion. Additionally, many local agencies, If User/Subscriber modifies this fact including Air Quality Management Districts, require dust sheet in any way,the CASQA control and/or dust control permits in order to comply with name/logo and footer below must be local nuisance laws, opacity laws (visibility impairment) and the removed from each page and not requirements of the Clean Air Act. Wind erosion control is appear on the modified version. required to be implemented at all construction sites greater than 1 acre by the General Permit. Suitable Applications Most BMPs that provide protection against water-based erosion will also protect against wind-based erosion and dust control requirements required by other agencies will generally meet wind erosion control requirements for water quality protection. Wind erosion control BMPs are suitable during the following construction activities: CASQA (AI.II'[)It file\SIOKM SAI I:It December 2019 CASQA BMP Handbook 1 of 5 Construction www.casqa.org Wind Erosion Control WE- 1 • Construction vehicle traffic on unpaved roads • Drilling and blasting activities • Soils and debris storage piles • Batch drop from front-end loaders • Areas with unstabilized soil • Final grading/site stabilization Limitations • Watering prevents dust only for a short period(generally less than a few hours) and should be applied daily(or more often)to be effective. • Over watering may cause erosion and track-out. • Oil or oil-treated subgrade should not be used for dust control because the oil may migrate into drainageways and/or seep into the soil. • Chemical dust suppression agents may have potential environmental impacts. Selected chemical dust control agents should be environmentally benign. • Effectiveness of controls depends on soil,temperature,humidity,wind velocity and traffic. • Chemical dust suppression agents should not be used within ioo feet of wetlands or water bodies. • Chemically treated subgrades may make the soil water repellant, interfering with long-term infiltration and the vegetation/re-vegetation of the site. Some chemical dust suppressants maybe subject to freezing and may contain solvents and should be handled properly. • In compacted areas,watering and other liquid dust control measures may wash sediment or other constituents into the drainage system. • If the soil surface has minimal natural moisture,the affected area may need to be pre-wetted so that chemical dust control agents can uniformly penetrate the soil surface. Implementation Dust Control Practices Dust control BMPs generally stabilize exposed surfaces and minimize activities that suspend or track dust particles. The following table presents dust control practices that can be applied to varying site conditions that could potentially cause dust. For heavily traveled and disturbed areas,wet suppression(watering), chemical dust suppression, gravel asphalt surfacing, temporary gravel construction entrances,equipment wash-out areas, and haul truck covers can be employed as dust control applications. Permanent or temporary vegetation and mulching can be employed for areas of occasional or no construction traffic. Preventive measures include minimizing surface areas to be disturbed,limiting onsite vehicle traffic to 15 mph or less, and controlling the number and activity of vehicles on a site at any given time. December 2019 CASQA BMP Handbook 2 of 5 Construction www.casqa.org Wind Erosion Control WE-1 Chemical dust suppressants include: mulch and fiber based dust palliatives(e.g.paper mulch with gypsum binder),salts and brines (e.g. calcium chloride,magnesium chloride), non- petroleum based organics (e.g.vegetable oil,lignosulfonate),petroleum based organics (e.g. asphalt emulsion, dust oils,petroleum resins), synthetic polymers (e.g.polyvinyl acetate,vinyl, acrylic), clay additives(e.g.bentonite, montmorillonite) and electrochemical products (e.g. enzymes, ionic products). Dust Control Practices Site Wet Chemical Gravel Temporary Gravel Minimize Condition Permanent Mulching Suppression Dust or Construction Synthetic Extent of Vegetation Entrances/Equipment Covers Disturbed (Watering) Suppression Asphalt Wash Down Area Disturbed Areas not X X X X X X Subject to Traffic Disturbed Areas X X X X X Subject to Traffic Material X X X X X Stockpiles Demolition X X X Clearing/ X X X Excavation Truck Traffic on X X X X X Unpaved Roads Tracking X X Additional preventive measures include: • Schedule construction activities to minimize exposed area(see EC-1, Scheduling). • Quickly treat exposed soils using water, mulching,chemical dust suppressants, or stone/gravel layering. • Identify and stabilize key access points prior to commencement of construction. • Minimize the impact of dust by anticipating the direction of prevailing winds. • Restrict construction traffic to stabilized roadways within the project site, as practicable. • Water should be applied by means of pressure-type distributors or pipelines equipped with a spray system or hoses and nozzles that will ensure even distribution. • All distribution equipment should be equipped with a positive means of shutoff. • Unless water is applied by means of pipelines, at least one mobile unit should be available at all times to apply water or dust palliative to the project. • If reclaimed waste water is used,the sources and discharge must meet California Department of Health Services water reclamation criteria and the Regional Water Quality December 2019 CASQA BMP Handbook 3 of 5 Construction www.casqa.org Wind Erosion Control WE-1 Control Board(RWQCB)requirements. Non-potable water should not be conveyed in tanks or drain pipes that will be used to convey potable water and there should be no connection between potable and non-potable supplies. Non-potable tanks,pipes, and other conveyances should be marked, "NON-POTABLE WATER- DO NOT DRINK." • Pave or chemically stabilize access points where unpaved traffic surfaces adjoin paved roads. • Provide covers for haul trucks transporting materials that contribute to dust. • Provide for rapid clean up of sediments deposited on paved roads. Furnish stabilized construction road entrances and wheel wash areas. • Stabilize inactive areas of construction sites using temporary vegetation or chemical stabilization methods. For chemical stabilization,there are many products available for chemically stabilizing gravel roadways and stockpiles. If chemical stabilization is used,the chemicals should not create any adverse effects on stormwater,plant life, or groundwater and should meet all applicable regulatory requirements. Costs Installation costs for water and chemical dust suppression vary based on the method used and the length of effectiveness.Annual costs may be high since some of these measures are effective for only a few hours to a few days. Inspection and Maintenance • Inspect and verify that activity-based BMPs are in place prior to the commencement of associated activities. • BMPs must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. • Check areas protected to ensure coverage. • Most water-based dust control measures require frequent application,often daily or even multiple times per day. Obtain vendor or independent information on longevity of chemical dust suppressants. References Best Management Practices and Erosion Control Manual for Construction Sites, Flood Control District of Maricopa County,Arizona, September 1992. California Air Pollution Control Laws, California Air Resources Board, updated annually. Construction Manual, Chapter 4, Section io, "Dust Control"; Section 17, "Watering"; and Section 18, "Dust Palliative", California Department of Transportation(Caltrans),July 2001. December 2019 CASQA BMP Handbook 4 of 5 Construction www.casqa.org Wind Erosion Control WE- 1 Prospects for Attaining the State Ambient Air Quality Standards for Suspended Particulate Matter(PMio),Visibility Reducing Particles, Sulfates, Lead, and Hydrogen Sulfide, California Air Resources Board,April 1991. Stormwater Quality Handbooks Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation(Caltrans), March 2003. December 2019 CASQA BMP Handbook 5 of 5 Construction www.casqa.org Material Delivery and Storage WM- 1 Categories EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control Waste Management and ur ��`� WM Materials Pollution Control Legend: �� Q Primary Category D © Secondary Category Description and Purpose Targeted Constituents Prevent, reduce, or eliminate the discharge of pollutants from Sediment 0 material delivery and storage to the stormwater system or Nutrients 0 watercourses by minimizing the storage of hazardous materials Trash p onsite, storing materials in watertight containers and/or a Metals 0 completely enclosed designated area,installing secondary Bacteria containment, conducting regular inspections, and training employees and subcontractors. Oil and Grease 0 Organics 0 This best management practice covers only material delivery and storage. For other information on materials, see WM-2, Potential Alternatives Material Use, or WM-4, Spill Prevention and Control. For information on wastes, see the waste management BMPs in this None section. Suitable Applications These procedures are suitable for use at all construction sites with delivery and storage of the following materials: If User/Subscriber modifies this fact sheeetet in any way,the CASQA name/logo and footer below must be • Soil stabilizers and binders removed from each page and not appear on the modified version. • Pesticides and herbicides • Fertilizers • Detergents • Plaster • Petroleum products such as fuel, oil, and grease CASQA CAI II I'Olt NIA S I'O K I1 VV_A l I;It December 2019 CASQA BMP Handbook 1 of 5 Construction www.casqa.org Material Delivery and Storage WM- 1 ■ Asphalt and concrete components ■ Hazardous chemicals such as acids,lime, glues, adhesives, paints, solvents, and curing compounds ■ Concrete compounds ■ Other materials that may be detrimental if released to the environment Limitations ■ Space limitation may preclude indoor storage. ■ Storage sheds often must meet building and fire code requirements. Implementation The following steps should be taken to minimize risk: ■ Chemicals must be stored in water tight containers with appropriate secondary containment or in a storage shed. ■ When a material storage area is located on bare soil,the area should be lined and bermed. ■ Use containment pallets or other practical and available solutions, such as storing materials within newly constructed buildings or garages,to meet material storage requirements. ■ Stack erodible landscape material on pallets and cover when not in use. ■ Contain all fertilizers and other landscape materials when not in use. ■ Temporary storage areas should be located away from vehicular traffic. ■ Material Safety Data Sheets (MSDS) should be available on-site for all materials stored that have the potential to effect water quality. ■ Construction site areas should be designated for material delivery and storage. ■ Material delivery and storage areas should be located away from waterways, if possible. - Avoid transport near drainage paths or waterways. - Surround with earth berms or other appropriate containment BMP. See EC-9, Earth Dikes and Drainage Swales. - Place in an area that will be paved. ■ Storage of reactive, ignitable, or flammable liquids must comply with the fire codes of your area. Contact the local Fire Marshal to review site materials, quantities, and proposed storage area to determine specific requirements. See the Flammable and Combustible Liquid Code,NFPA3o. ■ An up to date inventory of materials delivered and stored onsite should be kept. December 2019 CASQA BMP Handbook 2 of 5 Construction www.casqa.org Material Delivery and Storage WM- 1 • Hazardous materials storage onsite should be minimized. • Hazardous materials should be handled as infrequently as possible. • Keep ample spill cleanup supplies appropriate for the materials being stored. Ensure that cleanup supplies are in a conspicuous,labeled area. • Employees and subcontractors should be trained on the proper material delivery and storage practices. • Employees trained in emergency spill cleanup procedures must be present when dangerous materials or liquid chemicals are unloaded. • If significant residual materials remain on the ground after construction is complete, properly remove and dispose of materials and any contaminated soil. See WM-7, Contaminated Soil Management. If the area is to be paved,pave as soon as materials are removed to stabilize the soil. Material Storage Areas and Practices • Liquids,petroleum products, and substances listed in 4o CFR Parts 110, 117, or 302 should be stored in approved containers and drums and should not be overfilled. Containers and drums should be placed in temporary containment facilities for storage. • A temporary containment facility should provide for a spill containment volume able to contain precipitation from a 25-year storm event,plus the greater of io%of the aggregate volume of all containers or t00% of the capacity of the largest container within its boundary, whichever is greater. • A temporary containment facility should be impervious to the materials stored therein for a minimum contact time of 72 hours. • A temporary containment facility should be maintained free of accumulated rainwater and spills. In the event of spills or leaks, accumulated rainwater and spills should be collected and placed into drums. These liquids should be handled as a hazardous waste unless testing determines them to be non-hazardous. All collected liquids or non-hazardous liquids should be sent to an approved disposal site. • Sufficient separation should be provided between stored containers to allow for spill cleanup and emergency response access. • Incompatible materials, such as chlorine and ammonia, should not be stored in the same temporary containment facility. • Materials should be covered prior to, and during rain events. • Materials should be stored in their original containers and the original product labels should be maintained in place in a legible condition. Damaged or otherwise illegible labels should be replaced immediately. December 2019 CASQA BMP Handbook 3 of 5 Construction www.casqa.org Material Delivery and Storage WM- 1 ■ Bagged and boxed materials should be stored on pallets and should not be allowed to accumulate on the ground. To provide protection from wind and rain throughout the rainy season,bagged and boxed materials should be covered during non-working days and prior to and during rain events. ■ Stockpiles should be protected in accordance with WM-3, Stockpile Management. ■ Materials should be stored indoors within existing structures or completely enclosed storage sheds when available. ■ Proper storage instructions should be posted at all times in an open and conspicuous location. ■ An ample supply of appropriate spill clean up material should be kept near storage areas. ■ Also see WM-6, Hazardous Waste Management, for storing of hazardous wastes. Material Delivery Practices ■ Keep an accurate,up-to-date inventory of material delivered and stored onsite. ■ Arrange for employees trained in emergency spill cleanup procedures to be present when dangerous materials or liquid chemicals are unloaded. Spill Cleanup ■ Contain and clean up any spill immediately. ■ Properly remove and dispose of any hazardous materials or contaminated soil if significant residual materials remain on the ground after construction is complete. See WM-7, Contaminated Soil Management. ■ See WM-4, Spill Prevention and Control, for spills of chemicals and/or hazardous materials. ■ If spills or leaks of materials occur that are not contained and could discharge to surface waters, non-visible sampling of site discharge may be required. Refer to the General Permit or to your project specific Construction Site Monitoring Plan to determine if and where sampling is required. Cost ■ The largest cost of implementation may be in the construction of a materials storage area that is covered and provides secondary containment. Inspection and Maintenance ■ BMPs must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. ■ Keep storage areas clean and well organized, including a current list of all materials onsite. ■ Inspect labels on containers for legibility and accuracy. December 2019 CASQA BMP Handbook 4 of 5 Construction www.casqa.org Material Delivery and Storage WM- 1 • Repair or replace perimeter controls, containment structures, covers, and liners as needed to maintain proper function. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Coastal Nonpoint Pollution Control Program: Program Development and Approval Guidance, Working Group Working Paper; USEPA,April 1992. Stormwater Quality Handbooks -Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation(Caltrans), March 2003. Stormwater Management for Construction Activities; Developing Pollution Prevention Plans and Best Management Practice, EPA 832-R-92oo5; USEPA,April 1992. December 2019 CASQA BMP Handbook 5 of 5 Construction www.casqa.org Material Use WM-2 Categories EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control NS Non-Stormwater � Management Control : WM Waste Management and Q ;gull/ \� a Materials Pollution Control H � Legend: _�_III I _I 1¢ Q Primary Category I ❑K Secondary Category Targeted Constituents Description and Purpose Sediment Q Prevent or reduce the discharge of pollutants to the storm drain Nutrients Q system or watercourses from material use by using alternative Trash Q products, minimizing hazardous material use onsite, and Metals Q training employees and subcontractors. Bacteria Suitable Applications Oil and Grease Q This BMP is suitable for use at all construction projects. These Organics Q procedures apply when the following materials are used or prepared onsite: Potential Alternatives • Pesticides and herbicides None • Fertilizers • Detergents If User/Subscriber modifies this fact • Petroleum products such as fuel, oil, and grease sheet in any way,the CASQA name/logo and footer below must be • Asphalt and other concrete components removed from each page and not appear on the modified version. • Other hazardous chemicals such as acids,lime, glues, adhesives, paints, solvents, and curing compounds • Other materials that maybe detrimental if released to the environment CASQA CALIFORNIA STORM WATER !l \MI\ %,,tk1\!ll‘\ December 2019 CASQA BMP Handbook 1 of 4 Construction www.casqa.org Material Use WM-2 Limitations Safer alternative building and construction products may not be available or suitable in every instance. Implementation The following steps should be taken to minimize risk: ■ Minimize use of hazardous materials onsite. ■ Follow manufacturer instructions regarding uses,protective equipment,ventilation, flammability, and mixing of chemicals. ■ Train personnel who use pesticides. The California Department of Pesticide Regulation and county agricultural commissioners license pesticide dealers, certify pesticide applicators, and conduct onsite inspections. ■ The preferred method of termiticide application is soil injection near the existing or proposed structure foundation/slab;however,if not feasible, soil drench application of termiticides should follow EPA label guidelines and the following recommendations (most of which are applicable to most pesticide applications): • Do not treat soil that is water-saturated or frozen. • Application shall not commence within 24-hours of a predicted precipitation event with a 4o%or greater probability.Weather tracking must be performed on a daily basis prior to termiticide application and during the period of termiticide application. • Do not allow treatment chemicals to runoff from the target area. Apply proper quantity to prevent excess runoff. Provide containment for and divert stormwater from application areas using berms or diversion ditches during application. • Dry season: Do not apply within 10 feet of storm drains. Do not apply within 25 feet of aquatic habitats(such as,but not limited to,lakes; reservoirs; rivers; permanent streams; marshes or ponds; estuaries; and commercial fish farm ponds). ® Wet season: Do not apply within 5o feet of storm drains or aquatic habitats (such as,but not limited to,lakes; reservoirs; rivers;permanent streams; marshes or ponds; estuaries; and commercial fish farm ponds) unless a vegetative buffer is present(if so,refer to dry season requirements). IN Do not make on-grade applications when sustained wind speeds are above 10 mph(at application site) at nozzle end height. to Cover treatment site prior to a rain event in order to prevent run-off of the pesticide into non-target areas. The treated area should be limited to a size that can be backfilled and/or covered by the end of the work shift. Backfilling or covering of the treated area shall be done by the end of the same work shift in which the application is made. ■ The applicator must either cover the soil him/herself or provide written notification of the above requirement to the contractor on site and to the person commissioning the December 2019 CASQA BMP Handbook 2 of 4 Construction www.casqa.org Material Use WM®2 application(if different than the contractor). If notice is provided to the contractor or the person commissioning the application,then they are responsible under the Federal Insecticide Fungicide, and Rodenticide Act(FIFRA)to ensure that: 1.) if the concrete slab cannot be poured over the treated soil within 24 hours of application,the treated soil is covered with a waterproof covering(such as polyethylene sheeting), and 2)the treated soil is covered if precipitation is predicted to occur before the concrete slab is scheduled to be poured. ■ Do not over-apply fertilizers,herbicides, and pesticides. Prepare only the amount needed. Follow the recommended usage instructions. Over-application is expensive and environmentally harmful. Unless on steep slopes,till fertilizers into the soil rather than hydraulic application. Apply surface dressings in several smaller applications, as opposed to one large application,to allow time for infiltration and to avoid excess material being carried offsite by runoff. Do not apply these chemicals before predicted rainfall. ■ Train employees and subcontractors in proper material use. ■ Supply Material Safety Data Sheets(MSDS)for all materials. ■ Dispose of latex paint and paint cans,used brushes,rags, absorbent materials, and drop cloths,when thoroughly dry and are no longer hazardous,with other construction debris. ■ Do not remove the original product label; it contains important safety and disposal information. Use the entire product before disposing of the container. ■ Mix paint indoors or in a containment area. Never clean paintbrushes or rinse paint containers into a street, gutter,storm drain,or watercourse. Dispose of any paint thinners, residue, and sludge(s)that cannot be recycled, as hazardous waste. ■ For water-based paint, clean brushes to the extent practicable, and rinse to a drain leading to a sanitary sewer where permitted or contain for proper disposal off site. For oil-based paints, clean brushes to the extent practicable, and filter and reuse thinners and solvents. ■ Use recycled and less hazardous products when practical. Recycle residual paints, solvents, non-treated lumber, and other materials. ■ Use materials only where and when needed to complete the construction activity. Use safer alternative materials as much as possible. Reduce or eliminate use of hazardous materials onsite when practical. ■ Document the location,time, chemicals applied, and applicator's name and qualifications. ■ Keep an ample supply of spill clean up material near use areas. Train employees in spill clean up procedures. ■ Avoid exposing applied materials to rainfall and runoff unless sufficient time has been allowed for them to dry. ■ Discontinue use of erodible landscape material within 2 days prior to a forecasted rain event and materials should be covered and/or bermed. December 2019 CASQA BMP Handbook 3 of 4 Construction www.casqa.org Material Use WM®2 ■ Provide containment for material use areas such as masons' areas or paint mixing/preparation areas to prevent materials/pollutants from entering stormwater. Costs All of the above are low cost measures. Inspection and Maintenance e Inspect and verify that activity-based BMPs are in place prior to the commencement of associated activities. • BMPs must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. ® Ensure employees and subcontractors throughout the job are using appropriate practices. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Coastal Nonpoint Pollution Control Program: Program Development and Approval Guidance, Working Group Working Paper; USEPA,April 1992. Comments on Risk Assessments Risk Reduction Options for Cypermethrin: Docket No. OPP- 2005-0293; California Stormwater Quality Association(CASQA)letter to USEPA, 2oo6.Environmental Hazard and General Labeling for Pyrethroid Non-Agricultural Outdoor Products, EPA-HQ-OPP-2oo8-0331-oo21; USEPA, 2008. Stormwater Quality Handbooks -Construction Site Best Management Practices(BMPs)Manual, State of California Department of Transportation(Caltrans),March 2003. Stormwater Management for Construction Activities; Developing Pollution Prevention Plans and Best Management Practice, EPA 832-R-92005; USEPA,April 1992. December 2019 CASQA BMP Handbook 4 of 4 Construction www.casqa.org Stockpile Management WM-3 Treat Categories EC Erosion Control SE Sediment Control ❑x TC Tracking Control WE Wind Erosion Control NS Non-Stormwater ❑x Management Control WM Waste Management and Q Materials Pollution Control II I/ Legend: 0 Primary Category 0 Secondary Category Description and Purpose Targeted Constituents Stockpile management procedures and practices are designed Sediment 0 to reduce or eliminate air and stormwater pollution from Nutrients stockpiles of soil, soil amendments, sand,paving materials such Trash as Portland cement concrete(PCC) rubble, asphalt concrete Metals (AC), asphalt concrete rubble, aggregate base, aggregate sub Bacteria base or pre-mixed aggregate, asphalt minder(so called"cold Oil and Grease mix" asphalt), and pressure treated wood. Organics Suitable Applications Implement in all projects that stockpile soil and other loose Potential Alternatives materials. None Limitations • Plastic sheeting as a stockpile protection is temporary and hard to manage in windy conditions. Where plastic is used, consider use of plastic tarps with nylon reinforcement which may be more durable than standard sheeting. • Plastic sheeting can increase runoff volume due to lack of infiltration and potentially cause perimeter control failure. If User/Subscriber modifies this fact sheet in any way,the CASQA • Plastic sheeting breaks down faster in sunlight. name/logo and footer below must be removed from each page and not • The use of Plastic materials and photodegradable plastics appear on the modified version. should be avoided. Implementation Protection of stockpiles is a year-round requirement. To properly manage stockpiles: CASQA C'\I.HORN!:\SI'O12MiS:11 I:It December 2019 CASQA BMP Handbook 1 of 3 Construction www.casqa.org Stockpile Management WM-3 ■ On larger sites, a minimum of 5o ft separation from concentrated flows of stormwater, drainage courses, and inlets is recommended. ■ After 14 days of inactivity, a stockpile is non-active and requires further protection described below. All stockpiles are required to be protected as non-active stockpiles immediately if they are not scheduled to be used within 14 days. ■ Protect all stockpiles from stormwater run-on using temporary perimeter sediment barriers such as compost berms (SE-13),temporary silt dikes (SE-12), fiber rolls (SE-5), silt fences (SE-1), sandbags (SE-8), gravel bags (SE-6), or biofilter bags (SE-14). Refer to the individual fact sheet for each of these controls for installation information. ■ Implement wind erosion control practices as appropriate on all stockpiled material. For specific information, see WE-1,Wind Erosion Control. ■ Manage stockpiles of contaminated soil in accordance with WM-7, Contaminated Soil Management. ■ Place bagged materials on pallets and under cover. ■ Ensure that stockpile coverings are installed securely to protect from wind and rain. ■ Some plastic covers withstand weather and sunlight better than others. Select cover materials or methods based on anticipated duration of use. Protection ofNon Active Stockpiles A stockpile is considered non-active if it either is not used for 14 days or if it is scheduled not to be used for 14 days or more. Stockpiles need to be protected immediately if they are not scheduled to be used within 14 days. Non-active stockpiles of the identified materials should be protected as follows: Soil stockpiles ■ Soil stockpiles should be covered or protected with soil stabilization measures and a temporary perimeter sediment barrier at all times. ■ Temporary vegetation should be considered for topsoil piles that will be stockpiled for extended periods. Stockpiles of Portland cement concrete rubble, asphalt concrete, asphalt concrete rubble, aggregate base, or aggregate sub base ■ Stockpiles should be covered and protected with a temporary perimeter sediment barrier at all times. Stockpiles of"cold mix" ■ Cold mix stockpiles should be placed on and covered with plastic sheeting or comparable material at all times and surrounded by a berm. Stockpiles of fly ash,stucco, hydrated lime December 2019 CASQA BMP Handbook 2 of 3 Construction www.casqa.org Stockpile Management WM-3 • Stockpiles of materials that may raise the pH of runoff(i.e.,basic materials) should be covered with plastic and surrounded by a berm. Stockpiles/Storage of treated wood • Treated wood should be covered with plastic sheeting or comparable material at all times and surrounded by a berm. Protection ofActive Stockpiles A stockpile is active when it is being used or is scheduled to be used within 14 days of the previous use. Active stockpiles of the identified materials should be protected as follows: • All stockpiles should be covered and protected with a temporary linear sediment barrier prior to the onset of precipitation. • Stockpiles of"cold mix"and treated wood, and basic materials should be placed on and covered with plastic sheeting or comparable material and surrounded by a berm prior to the onset of precipitation. • The downstream perimeter of an active stockpile should be protected with a linear sediment barrier or berm and runoff should be diverted around or away from the stockpile on the upstream perimeter. Costs For cost information associated with stockpile protection refer to the individual erosion or sediment control BMP fact sheet considered for implementation(For example, refer to SE-1 Silt Fence for installation of silt fence around the perimeter of a stockpile.) Inspection and Maintenance • Stockpiles must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. • It may be necessary to inspect stockpiles covered with plastic sheeting more frequently during certain conditions (for example,high winds or extreme heat). • Repair and/or replace perimeter controls and covers as needed to keep them functioning properly. • Sediment shall be removed when it reaches one-third of the barrier height. References Stormwater Quality Handbooks -Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation(Caltrans), March 2003. December 2019 CASQA BMP Handbook 3 of 3 Construction www.casqa.org Spill Prevention and Control WM-4 Categories EC Erosion Control SE Sediment Control TC Tracking Control 11 WE Wind Erosion Control Non-Stormwater NS Management Control WM Waste Management and Materials Pollution Control Legend: 0 Primary Objective ❑x Secondary Objective 4fiJ PoR S� VWX YZ v; Targeted Constituents Description and Purpose Sediment 0 Prevent or reduce the discharge of pollutants to drainage Nutrients systems or watercourses from leaks and spills by reducing the Trash chance for spills, stopping the source of spills, containing and Metals cleaning up spills, properly disposing of spill materials, and training employees. Bacteria Oil and Grease This best management practice covers only spill prevention and Organics control. However,WM-1, Materials Delivery and Storage, and WM-2, Material Use, also contain useful information, — particularly on spill prevention. For information on wastes, see Potential Alternatives the waste management BMPs in this section. None Suitable Applications This BMP is suitable for all construction projects. Spill control procedures are implemented anytime chemicals or hazardous If User/Subscriber modifies this fact substances are stored on the construction site,including the sheet in any way,the CASQA following materials: name/logo and footer below must be removed from each page and not • Soil stabilizers/binders appear on the modified version. • Dust palliatives • Herbicides • Growth inhibitors • Fertilizers • Deicing/anti-icing chemicals CASQA G\LII'OR\IA SI OR\IW:\Il R December 2019 CASQA BMP Handbook 1 of 6 Construction www.casqa.org Spill Prevention and Control WM-4 ■ Fuels ■ Lubricants ■ Other petroleum distillates Limitations ■ In some cases,it may be necessary to use a private spill cleanup company. ■ This BMP applies to spills caused by the contractor and subcontractors. ■ Procedures and practices presented in this BMP are general. Contractor should identify appropriate practices for the specific materials used or stored onsite Implementation The following steps will help reduce the stormwater impacts of leaks and spills: Education ■ Be aware that different materials pollute in different amounts. Make sure that each employee knows what a"significant spill"is for each material they use, and what is the appropriate response for"significant"and"insignificant" spills. ■ Educate employees and subcontractors on potential dangers to humans and the environment from spills and leaks. ■ Hold regular meetings to discuss and reinforce appropriate disposal procedures (incorporate into regular safety meetings). ■ Establish a continuing education program to indoctrinate new employees. ■ Have contractor's superintendent or representative oversee and enforce proper spill prevention and control measures. General Measures ■ To the extent that the work can be accomplished safely, spills of oil,petroleum products, substances listed under 4o CFR parts 110,117, and 302, and sanitary and septic wastes should be contained and cleaned up immediately. ■ Store hazardous materials and wastes in covered containers and protect from vandalism. ■ Place a stockpile of spill cleanup materials where it will be readily accessible. ■ Train employees in spill prevention and cleanup. ■ Designate responsible individuals to oversee and enforce control measures. ■ Spills should be covered and protected from stormwater runon during rainfall to the extent that it doesn't compromise clean up activities. ■ Do not bury or wash spills with water. December 2019 CASQA BMP Handbook 2 of 6 Construction www.casqa.org Spill Prevention and Control WM-4 • Store and dispose of used clean up materials, contaminated materials, and recovered spill material that is no longer suitable for the intended purpose in conformance with the provisions in applicable BMPs. • Do not allow water used for cleaning and decontamination to enter storm drains or watercourses. Collect and dispose of contaminated water in accordance with WM-io, Liquid Waste Management. • Contain water overflow or minor water spillage and do not allow it to discharge into drainage facilities or watercourses. • Place proper storage, cleanup, and spill reporting instructions for hazardous materials stored or used on the project site in an open, conspicuous, and accessible location. • Keep waste storage areas clean,well organized, and equipped with ample cleanup supplies as appropriate for the materials being stored. Perimeter controls, containment structures, covers, and liners should be repaired or replaced as needed to maintain proper function. Cleanup • Clean up leaks and spills immediately. • Use a rag for small spills on paved surfaces, a damp mop for general cleanup, and absorbent material for larger spills. If the spilled material is hazardous, then the used cleanup materials are also hazardous and must be sent to either a certified laundry(rags) or disposed of as hazardous waste. • Never hose down or bury dry material spills. Clean up as much of the material as possible and dispose of properly. See the waste management BMPs in this section for specific information. Minor Spills • Minor spills typically involve small quantities of oil, gasoline, paint, etc.which can be controlled by the first responder at the discovery of the spill. • Use absorbent materials on small spills rather than hosing down or burying the spill. • Absorbent materials should be promptly removed and disposed of properly. • Follow the practice below for a minor spill: - Contain the spread of the spill. - Recover spilled materials. - Clean the contaminated area and properly dispose of contaminated materials. Semi-Significant Spills • Semi-significant spills still can be controlled by the first responder along with the aid of other personnel such as laborers and the foreman, etc. This response may require the cessation of all other activities. December 2019 CASQA BMP Handbook 3 of 6 Construction www.casqa.org Spill Prevention and Control WM-4 • Spills should be cleaned up immediately: - Contain spread of the spill. - Notify the project foreman immediately. - If the spill occurs on paved or impermeable surfaces, clean up using "dry"methods (absorbent materials, cat litter and/or rags). Contain the spill by encircling with absorbent materials and do not let the spill spread widely. - If the spill occurs in dirt areas, immediately contain the spill by constructing an earthen dike. Dig up and properly dispose of contaminated soil. - If the spill occurs during rain, cover spill with tarps or other material to prevent contaminating runoff. Significant/Hazardous Spills • For significant or hazardous spills that cannot be controlled by personnel in the immediate vicinity,the following steps should be taken: - Notify the local emergency response by dialing 911. In addition to 911, the contractor will notify the proper county officials. It is the contractor's responsibility to have all emergency phone numbers at the construction site. - Notify the Governor's Office of Emergency Services Warning Center, (916) 845-8911. - For spills of federal reportable quantities, in conformance with the requirements in 40 CFR parts 110,119, and 302,the contractor should notify the National Response Center at (800) 424-8802. - Notification should first be made by telephone and followed up with a written report. - The services of a spill's contractor or a Haz-Mat team should be obtained immediately. Construction personnel should not attempt to clean up until the appropriate and qualified staffs have arrived at the job site. - Other agencies which may need to be consulted include,but are not limited to,the Fire Department,the Public Works Department,the Coast Guard,the Highway Patrol,the City/County Police Department, Department of Toxic Substances, California Division of Oil and Gas, Cal/OSHA, etc. Reporting • Report significant spills to local agencies, such as the Fire Department; they can assist in cleanup. • Federal regulations require that any significant oil spill into a water body or onto an adjoining shoreline be reported to the National Response Center (NRC) at 800-424-8802 (24 hours). Use the following measures related to specific activities: December 2019 CASQA BMP Handbook 4 of 6 Construction www.casqa.org Spill Prevention and Control WM-4 Vehicle and Equipment Maintenance • If maintenance must occur onsite,use a designated area and a secondary containment, located away from drainage courses,to prevent the runon of stormwater and the runoff of spills. • Regularly inspect onsite vehicles and equipment for leaks and repair immediately • Check incoming vehicles and equipment(including delivery trucks, and employee and subcontractor vehicles)for leaking oil and fluids. Do not allow leaking vehicles or equipment onsite. • Always use secondary containment, such as a drain pan or drop cloth, to catch spills or leaks when removing or changing fluids. • Place drip pans or absorbent materials under paving equipment when not in use. • Use absorbent materials on small spills rather than hosing down or burying the spill. Remove the absorbent materials promptly and dispose of properly. • Promptly transfer used fluids to the proper waste or recycling drums. Don't leave full drip pans or other open containers lying around • Oil filters disposed of in trashcans or dumpsters can leak oil and pollute stormwater. Place the oil filter in a funnel over a waste oil-recycling drum to drain excess oil before disposal. Oil filters can also be recycled. Ask the oil supplier or recycler about recycling oil filters. • Store cracked batteries in a non-leaking secondary container. Do this with all cracked batteries even if you think all the acid has drained out. If you drop a battery,treat it as if it is cracked. Put it into the containment area until you are sure it is not leaking. Vehicle and Equipment Fueling • If fueling must occur onsite,use designate areas,located away from drainage courses,to prevent the runon of stormwater and the runoff of spills. • Discourage"topping off'of fuel tanks. • Always use secondary containment, such as a drain pan,when fueling to catch spills/leaks. Costs Prevention of leaks and spills is inexpensive. Treatment and/ or disposal of contaminated soil or water can be quite expensive. Inspection and Maintenance • Inspect and verify that activity—based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect BMPs in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. December 2019 CASQA BMP Handbook 5 of 6 Construction www.casqa.org Spill Prevention and Control WM-4 • Inspect BMPs subject to non-stormwater discharge daily while non-stormwater discharges occur. • Keep ample supplies of spill control and cleanup materials onsite, near storage,unloading, and maintenance areas. • Update your spill prevention and control plan and stock cleanup materials as changes occur in the types of chemicals onsite. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Stormwater Quality Handbooks-Construction Site Best Management Practices (BMPs)Manual, State of California Department of Transportation(Caltrans),November 2000. Stormwater Management for Construction Activities; Developing Pollution Prevention Plans and Best Management Practice, EPA 832-R-92oo5; USEPA,April 1992. December 2019 CASQA BMP Handbook 6 of 6 Construction www.casqa.org Solid Waste Management WM-5 Categories EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control NS Non-Stormwater ,41 Management Control z,.. wm Waste Management and �/ Materials Pollution Control 1411114,41 Legend: .-_,;'` 9 `> ,._ El Primary Objective 1002 x❑ Secondary Objective Targeted Constituents Description and Purpose Sediment 0 Solid waste management procedures and practices are designed Nutrients Q to prevent or reduce the discharge of pollutants to stormwater Trash Q from solid or construction waste by providing designated waste Metals Q collection areas and containers, arranging for regular disposal, and training employees and subcontractors. Bacteria Oil and Grease 0 Suitable Applications Organics 0 This BMP is suitable for construction sites where the following wastes are generated or stored: Potential Alternatives • Solid waste generated from trees and shrubs removed None during land clearing, demolition of existing structures (rubble), and building construction • Packaging materials including wood,paper, and plastic If User/Subscriber modifies this fact • Scrap or surplus building materials including scrap metals, sheet in any way,the CASQA rubber,plastic, glass pieces, and masonry products name/logo and footer below must be removed from each page and not • Domestic wastes including food containers such as beverage appear on the modified version. cans, coffee cups,paper bags,plastic wrappers, and cigarettes • Construction wastes including brick, mortar,timber, steel and metal scraps, pipe and electrical cuttings, non- hazardous equipment parts, styrofoam and other materials used to transport and package construction materials CASQA CALIFORNIA STORMWATER December 2019 CASQA BMP Handbook 1 of 4 Construction www.casqa.org Solid Waste Management WM-5 ■ Highway planting wastes,including vegetative material,plant containers, and packaging materials Limitations Temporary stockpiling of certain construction wastes may not necessitate stringent drainage related controls during the non-rainy season or in desert areas with low rainfall. Implementation The following steps will help keep a clean site and reduce stormwater pollution: ■ Select designated waste collection areas onsite. ■ Inform trash-hauling contractors that you will accept only watertight dumpsters for onsite use. Inspect dumpsters for leaks and repair any dumpster that is not watertight. ■ Locate containers in a covered area or in a secondary containment. • Provide an adequate number of containers with lids or covers that can be placed over the container to keep rain out or to prevent loss of wastes when it is windy. • Cover waste containers at the end of each work day and when it is raining. ■ Plan for additional containers and more frequent pickup during the demolition phase of construction. ■ Collect site trash daily, especially during rainy and windy conditions. ■ Remove this solid waste promptly since erosion and sediment control devices tend to collect litter. • Make sure that toxic liquid wastes (used oils, solvents, and paints) and chemicals (acids, pesticides, additives, curing compounds) are not disposed of in dumpsters designated for construction debris. ■ Do not hose out dumpsters on the construction site. Leave dumpster cleaning to the trash hauling contractor. ■ Arrange for regular waste collection before containers overflow. ■ Clean up immediately if a container does spill. • Make sure that construction waste is collected,removed, and disposed of only at authorized disposal areas. Education ■ Have the contractor's superintendent or representative oversee and enforce proper solid waste management procedures and practices. at Instruct employees and subcontractors on identification of solid waste and hazardous waste. ■ Educate employees and subcontractors on solid waste storage and disposal procedures. December 2019 CASQA BMP Handbook 2 of 4 Construction www.casqa.org Solid Waste Management WM-5 ■ Hold regular meetings to discuss and reinforce disposal procedures (incorporate into regular safety meetings). ■ Require that employees and subcontractors follow solid waste handling and storage procedures. • Prohibit littering by employees,subcontractors, and visitors. an Minimize production of solid waste materials wherever possible. Collection,Storage, and Disposal ■ Littering on the project site should be prohibited. ■ To prevent clogging of the storm drainage system,litter and debris removal from drainage grates,trash racks, and ditch lines should be a priority. • Trash receptacles should be provided in the contractor's yard,field trailer areas, and at locations where workers congregate for lunch and break periods. • Litter from work areas within the construction limits of the project site should be collected and placed in watertight dumpsters at least weekly, regardless of whether the litter was generated by the contractor,the public,or others. Collected litter and debris should not be placed in or next to drain inlets, stormwater drainage systems,or watercourses. • Dumpsters of sufficient size and number should be provided to contain the solid waste generated by the project. ■ Full dumpsters should be removed from the project site and the contents should be disposed of by the trash hauling contractor. ■ Construction debris and waste should be removed from the site biweekly or more frequently as needed. • Construction material visible to the public should be stored or stacked in an orderly manner. • Stormwater runon should be prevented from contacting stored solid waste through the use of berms, dikes, or other temporary diversion structures or through the use of measures to elevate waste from site surfaces. • Solid waste storage areas should be located at least 5o ft from drainage facilities and watercourses and should not be located in areas prone to flooding or ponding. Is Except during fair weather, construction and highway planting waste not stored in watertight dumpsters should be securely covered from wind and rain by covering the waste with tarps or plastic. • Segregate potentially hazardous waste from non-hazardous construction site waste. ■ Make sure that toxic liquid wastes (used oils,solvents, and paints) and chemicals (acids, pesticides, additives, curing compounds) are not disposed of in dumpsters designated for construction debris. December 2019 CASQA BMP Handbook 3 of 4 Construction www.casqa.org Solid Waste Management WM®5 • For disposal of hazardous waste, see WM-6, Hazardous Waste Management. Have hazardous waste hauled to an appropriate disposal and/or recycling facility. • Salvage or recycle useful vegetation debris,packaging and surplus building materials when practical. For example,trees and shrubs from land clearing can be used as a brush barrier, or converted into wood chips,then used as mulch on graded areas. Wood pallets, cardboard boxes, and construction scraps can also be recycled. Costs All of the above are low cost measures. Inspection and Maintenance an Inspect and verify that activity—based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect BMPs in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. • Inspect BMPs subject to non-stormwater discharge daily while non-stormwater discharges occur • Inspect construction waste area regularly. • Arrange for regular waste collection. References Processes, Procedures and Methods to Control Pollution Resulting from All Construction Activity,430/9-73-007, USEPA, 1973. Stormwater Quality Handbooks -Construction Site Best Management Practices (BMPs)Manual, State of California Department of Transportation(Caltrans),November 2000. Stormwater Management for Construction Activities; Developing Pollution Prevention Plans and Best Management Practice, EPA 832-R-92oo5; USEPA,April 1992. December 2019 CASQA BMP Handbook 4 of 4 Construction www.casqa.org Hazardous Waste Management WM-6 Categories EC Erosion Control SE Sediment Control TC Tracking Control -'c � WE Wind Erosion Control 3 �� NS Non-Stormwater ANManagement Control Waste Management and Q INM Materials Pollution Control Legend: i;l 1 Q Primary Objective 444 El Secondary Objective Targeted Constituents Description and Purpose Sediment Prevent or reduce the discharge of pollutants to stormwater from Nutrients C�1 hazardous waste through proper material use,waste disposal, Trash C�( and training of employees and subcontractors. Metals Suitable Applications Bacteria Q This best management practice(BMP) applies to all construction Oil and Grease 0 projects. Hazardous waste management practices are Organics 0 implemented on construction projects that generate waste from the use of: Potential Alternatives - Petroleum Products - Asphalt Products None - Concrete Curing Compounds - Pesticides - Palliatives - Acids If User/Subscriber modifies this fact sheet in any way,the CASQA - Septic Wastes - Paints name/logo and footer below must be removed from each page and not - Stains - Solvents appear on the modified version. - Wood Preservatives - Roofing Tar - Any materials deemed a hazardous waste in California, Title 22 Division 4.5, or listed in 4o CFR Parts 11o, 117, 261, or 302 CASQA CALIFORNIA STORMWATER QUALITY.ASSOC!ATION December 2019 CASQA BMP Handbook 1 of 6 Construction www.casqa.org Hazardous Waste Management WM-6 In addition, sites with existing structures may contain wastes,which must be disposed of in accordance with federal, state, and local regulations. These wastes include: • Sandblasting grit mixed with lead-, cadmium-, or chromium-based paints • Asbestos • PCBs (particularly in older transformers) Limitations • Hazardous waste that cannot be reused or recycled must be disposed of by a licensed hazardous waste hauler. • Nothing in this BMP relieves the contractor from responsibility for compliance with federal, state, and local laws regarding storage,handling,transportation, and disposal of hazardous wastes. • This BMP does not cover aerially deposited lead(ADL) soils. For ADL soils refer to WM-7, Contaminated Soil Management. Implementation The following steps will help reduce stormwater pollution from hazardous wastes: Material Use • Wastes should be stored in sealed containers constructed of a suitable material and should be labeled as required by Title 22 CCR, Division 4.5 and 49 CFR Parts 172, 173, 178, and 179. • All hazardous waste should be stored,transported, and disposed as required in Title 22 CCR, Division 4.5 and 49 CFR 261-263. • Waste containers should be stored in temporary containment facilities that should comply with the following requirements: - Temporary containment facility should provide for a spill containment volume equal to 1.5 times the volume of all containers able to contain precipitation from a 25-year storm event, plus the greater of io% of the aggregate volume of all containers or 100% of the capacity of the largest tank within its boundary,whichever is greater. - Temporary containment facility should be impervious to the materials stored there for a minimum contact time of 72 hours. - Temporary containment facilities should be maintained free of accumulated rainwater and spills. In the event of spills or leaks, accumulated rainwater and spills should be placed into drums after each rainfall. These liquids should be handled as a hazardous waste unless testing determines them to be non-hazardous. Non-hazardous liquids should be sent to an approved disposal site. - Sufficient separation should be provided between stored containers to allow for spill cleanup and emergency response access. December 2019 CASQA BMP Handbook 2 of 6 Construction www.casqa.org Hazardous Waste Management WM-6 - Incompatible materials, such as chlorine and ammonia, should not be stored in the same temporary containment facility. - Throughout the rainy season,temporary containment facilities should be covered during non-working days, and prior to rain events. Covered facilities may include use of plastic tarps for small facilities or constructed roofs with overhangs. • Drums should not be overfilled, and wastes should not be mixed. a Unless watertight, containers of dry waste should be stored on pallets. • Do not over-apply herbicides and pesticides. Prepare only the amount needed. Follow the recommended usage instructions. Over application is expensive and environmentally harmful. Apply surface dressings in several smaller applications, as opposed to one large application. Allow time for infiltration and avoid excess material being carried offsite by runoff. Do not apply these chemicals just before it rains. People applying pesticides must be certified in accordance with federal and state regulations. • Paint brushes and equipment for water and oil-based paints should be cleaned within a contained area and should not be allowed to contaminate site soils,watercourses, or drainage systems. Waste paints,thinners, solvents, residues, and sludges that cannot be recycled or reused should be disposed of as hazardous waste. When thoroughly dry,latex paint and paint cans, used brushes, rags, absorbent materials, and drop cloths should be disposed of as solid waste. • Do not clean out brushes or rinse paint containers into the dirt, street, gutter, storm drain, or stream. "Paint out"brushes as much as possible. Rinse water-based paints to the sanitary sewer. Filter and reuse thinners and solvents. Dispose of excess oil-based paints and sludge as hazardous waste. is The following actions should be taken with respect to temporary contaminant: - Ensure that adequate hazardous waste storage volume is available. - Ensure that hazardous waste collection containers are conveniently located. - Designate hazardous waste storage areas onsite away from storm drains or watercourses and away from moving vehicles and equipment to prevent accidental spills. - Minimize production or generation of hazardous materials and hazardous waste on the job site. - Use containment berms in fueling and maintenance areas and where the potential for spills is high. - Segregate potentially hazardous waste from non-hazardous construction site debris. - Keep liquid or semi-liquid hazardous waste in appropriate containers (closed drums or similar) and under cover. December 2019 CASQA BMP Handbook 3 of 6 Construction www.casqa.org Hazardous Waste Management WM-6 - Clearly label all hazardous waste containers with the waste being stored and the date of accumulation. - Place hazardous waste containers in secondary containment. - Do not allow potentially hazardous waste materials to accumulate on the ground. - Do not mix wastes. - Use all of the product before disposing of the container. - Do not remove the original product label; it contains important safety and disposal information. Waste Recycling Disposal • Select designated hazardous waste collection areas onsite. • Hazardous materials and wastes should be stored in covered containers and protected from vandalism. • Place hazardous waste containers in secondary containment. • Do not mix wastes,this can cause chemical reactions,making recycling impossible and complicating disposal. • Recycle any useful materials such as used oil or water-based paint. • Make sure that toxic liquid wastes (used oils, solvents, and paints) and chemicals (acids, pesticides, additives, curing compounds) are not disposed of in dumpsters designated for construction debris. • Arrange for regular waste collection before containers overflow. • Make sure that hazardous waste (e.g., excess oil-based paint and sludge)is collected, removed, and disposed of only at authorized disposal areas. Disposal Procedures • Waste should be disposed of by a licensed hazardous waste transporter at an authorized and licensed disposal facility or recycling facility utilizing properly completed Uniform Hazardous Waste Manifest forms. • A Department of Health Services certified laboratory should sample waste to determine the appropriate disposal facility. • Properly dispose of rainwater in secondary containment that may have mixed with hazardous waste. • Attention is directed to "Hazardous Material", "Contaminated Material", and "Aerially Deposited Lead" of the contract documents regarding the handling and disposal of hazardous materials. December 2019 CASQA BMP Handbook 4 of 6 Construction www.casqa.org Hazardous Waste Management WM-6 Education • Educate employees and subcontractors on hazardous waste storage and disposal procedures. • Educate employees and subcontractors on potential dangers to humans and the environment from hazardous wastes. • Instruct employees and subcontractors on safety procedures for common construction site hazardous wastes. ■ Instruct employees and subcontractors in identification of hazardous and solid waste. • Hold regular meetings to discuss and reinforce hazardous waste management procedures (incorporate into regular safety meetings). IN The contractor's superintendent or representative should oversee and enforce proper hazardous waste management procedures and practices. ■ Make sure that hazardous waste is collected, removed, and disposed of only at authorized disposal areas. ■ Warning signs should be placed in areas recently treated with chemicals. ■ Place a stockpile of spill cleanup materials where it will be readily accessible. ■ If a container does spill, clean up immediately. Costs All of the above are low cost measures. Inspection and Maintenance • Inspect and verify that activity—based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect BMPs in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. • Inspect BMPs subject to non-stormwater discharge daily while non-stormwater discharges occur ■ Hazardous waste should be regularly collected. ■ A foreman or construction supervisor should monitor onsite hazardous waste storage and disposal procedures. ■ Waste storage areas should be kept clean,well organized, and equipped with ample cleanup supplies as appropriate for the materials being stored. ■ Perimeter controls, containment structures, covers, and liners should be repaired or replaced as needed to maintain proper function. December 2019 CASQA BMP Handbook 5 of 6 Construction www.casqa.org Hazardous Waste Management WM-6 • Hazardous spills should be cleaned up and reported in conformance with the applicable Material Safety Data Sheet (MSDS) and the instructions posted at the project site. • The National Response Center, at(800) 424-8802, should be notified of spills of federal reportable quantities in conformance with the requirements in 4o CFR parts 110, 117, and 302. Also notify the Governors Office of Emergency Services Warning Center at (916) 845- 8911. • A copy of the hazardous waste manifests should be provided. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Processes, Procedures and Methods to Control Pollution Resulting from All Construction Activity, 430/9-73-007,USEPA, 1973. Stormwater Quality Handbooks -Construction Site Best Management Practices (BMPs)Manual, State of California Department of Transportation(Caltrans),November 2000. Stormwater Management for Construction Activities; Developing Pollution Prevention Plans and Best Management Practice, EPA 832-R-92oo5; USEPA,April 1992. December 2019 CASQA BMP Handbook 6 of 6 Construction www.casqa.org Concrete Waste Management WM-8 Categories CONCRETE EC Erosion Control WASHOUT SE Sediment Control I/ P AREA TC Tracking Control WE Wind Erosion Control NS Non-Stormwater ❑x Management Control WM Waste Management and Materials Pollution Control Legend: j) 0 Primary Category 0 Secondary Category Targeted Constituents Description and Purpose Sediment Prevent the discharge of pollutants to stormwater from Nutrients concrete waste by conducting washout onsite or offsite in a Trash designated area, and by employee and subcontractor training. Metals 0 The General Permit incorporates Numeric Action Levels (NAL) Bacteria for pH (see Section 2 of this handbook to determine your Oil and Grease project's risk level and if you are subject to these requirements). Organics Many types of construction materials, including mortar, concrete, stucco, cement and block and their associated wastes Potential Alternatives have basic chemical properties that can raise pH levels outside None of the permitted range. Additional care should be taken when managing these materials to prevent them from coming into contact with stormwater flows and raising pH to levels outside the accepted range. Suitable Applications If User/Subscriber modifies this fact sheet in any way,the CASQA Concrete waste management procedures and practices are name/logo and footer below must be implemented on construction projects where: removed from each page and not appear on the modified version. • Concrete is used as a construction material or where concrete dust and debris result from demolition activities. • Slurries containing Portland cement concrete (PCC) are generated, such as from saw cutting, coring, grinding, grooving, and hydro-concrete demolition. • Concrete trucks and other concrete-coated equipment are washed onsite. CASQA C:.\LII()K\IA S I ORN111\I LR December 2019 CASQA BMP Handbook 1 of 7 Construction www.casqa.org Concrete Waste Management WM-8 ■ Mortar-mixing stations exist. ■ Stucco mixing and spraying. ■ See also NS-8,Vehicle and Equipment Cleaning. Limitations ■ Offsite washout of concrete wastes may not always be possible. ■ Multiple washouts may be needed to assure adequate capacity and to allow for evaporation. Implementation The following steps will help reduce stormwater pollution from concrete wastes: ■ Incorporate requirements for concrete waste management into material supplier and subcontractor agreements. ■ Store dry and wet materials under cover, away from drainage areas. Refer to WM-1, Material Delivery and Storage for more information. ■ Avoid mixing excess amounts of concrete. ■ Perform washout of concrete trucks in designated areas only,where washout will not reach stormwater. ■ Do not wash out concrete trucks into storm drains, open ditches, streets, streams or onto the ground. Trucks should always be washed out into designated facilities. ■ Do not allow excess concrete to be dumped onsite, except in designated areas. ■ For onsite washout: - On larger sites, it is recommended to locate washout areas at least 5o feet from storm drains, open ditches, or water bodies. Do not allow runoff from this area by constructing a temporary pit or bermed area large enough for liquid and solid waste. - Washout wastes into the temporary washout where the concrete can set,be broken up, and then disposed properly. - Washouts shall be implemented in a manner that prevents leaching to underlying soils. Washout containers must be water tight and washouts on or in the ground must be lined with a suitable impervious liner,typically a plastic type material. ■ Do not wash sweepings from exposed aggregate concrete into the street or storm drain. Collect and return sweepings to aggregate base stockpile or dispose in the trash. ■ See typical concrete washout installation details at the end of this fact sheet. Education ■ Educate employees, subcontractors, and suppliers on the concrete waste management techniques described herein. December 2019 CASQA BMP Handbook 2 of 7 Construction www.casqa.org Concrete Waste Management WM-8 ■ Arrange for contractor's superintendent or representative to oversee and enforce concrete waste management procedures. ■ Discuss the concrete management techniques described in this BMP (such as handling of concrete waste and washout)with the ready-mix concrete supplier before any deliveries are made. Concrete Demolition Wastes ■ Stockpile concrete demolition waste in accordance with BMP WM-3, Stockpile Management. ■ Dispose of or recycle hardened concrete waste in accordance with applicable federal, state or local regulations. Concrete Slurry Wastes ■ PCC and AC waste should not be allowed to enter storm drains or watercourses. ■ PCC and AC waste should be collected and disposed of or placed in a temporary concrete washout facility(as described in Onsite Temporary Concrete Washout Facility, Concrete Transit Truck Washout Procedures,below). ■ A foreman or construction supervisor should monitor onsite concrete working tasks, such as saw cutting, coring, grinding and grooving to ensure proper methods are implemented. ■ Saw-cut concrete slurry should not be allowed to enter storm drains or watercourses. Residue from grinding operations should be picked up by means of a vacuum attachment to the grinding machine or by sweeping. Saw cutting residue should not be allowed to flow across the pavement and should not be left on the surface of the pavement. See also NS-3, Paving and Grinding Operations; and WM-io, Liquid Waste Management. ■ Concrete slurry residue should be disposed in a temporary washout facility(as described in Onsite Temporary Concrete Washout Facility, Concrete Transit Truck Washout Procedures, below) and allowed to dry. Dispose of dry slurry residue in accordance with WM-5, Solid Waste Management. Onsite Temporary Concrete Washout Facility, Transit Truck Washout Procedures ■ Temporary concrete washout facilities should be located a minimum of 5o ft from storm drain inlets, open drainage facilities, and watercourses. Each facility should be located away from construction traffic or access areas to prevent disturbance or tracking. ■ A sign should be installed adjacent to each washout facility to inform concrete equipment operators to utilize the proper facilities. ■ Temporary concrete washout facilities should be constructed above grade or below grade at the option of the contractor. Temporary concrete washout facilities should be constructed and maintained in sufficient quantity and size to contain all liquid and concrete waste generated by washout operations. December 2019 CASQA BMP Handbook 3 of 7 Construction www.casqa.org Concrete Waste Management WM-8 • Temporary washout facilities should have a temporary pit or bermed areas of sufficient volume to completely contain all liquid and waste concrete materials generated during washout procedures. • Temporary washout facilities should be lined to prevent discharge to the underlying ground or surrounding area. • Washout of concrete trucks should be performed in designated areas only. • Only concrete from mixer truck chutes should be washed into concrete wash out. • Concrete washout from concrete pumper bins can be washed into concrete pumper trucks and discharged into designated washout area or properly disposed of or recycled offsite. • Once concrete wastes are washed into the designated area and allowed to harden,the concrete should be broken up,removed, and disposed of per WM-5, Solid Waste Management. Dispose of or recycle hardened concrete on a regular basis. • Temporary Concrete Washout Facility(Type Above Grade) - Temporary concrete washout facility(type above grade)should be constructed as shown on the details at the end of this BMP,with a recommended minimum length and minimum width of io ft; however, smaller sites or jobs may only need a smaller washout facility.With any washout, always maintain a sufficient quantity and volume to contain all liquid and concrete waste generated by washout operations. - Materials used to construct the washout area should conform to the provisions detailed in their respective BMPs(e.g., SE-8 Sandbag Barrier). - Plastic lining material should be a minimum of io mil in polyethylene sheeting and should be free of holes,tears, or other defects that compromise the impermeability of the material. - Alternatively,portable removable containers can be used as above grade concrete washouts. Also called a"roll-off'; this concrete washout facility should be properly sealed to prevent leakage and should be removed from the site and replaced when the container reaches 75%capacity. • Temporary Concrete Washout Facility(Type Below Grade) - Temporary concrete washout facilities (type below grade) should be constructed as shown on the details at the end of this BMP,with a recommended minimum length and minimum width of 10 ft. The quantity and volume should be sufficient to contain all liquid and concrete waste generated by washout operations. - Lath and flagging should be commercial type. - Plastic lining material should be a minimum of 10 mil polyethylene sheeting and should be free of holes,tears, or other defects that compromise the impermeability of the material. December 2019 CASQA BMP Handbook 4 of 7 Construction www.casqa.org Concrete Waste Management WM-8 - The base of a washout facility should be free of rock or debris that may damage a plastic liner. Removal of Temporary Concrete Washout Facilities ■ When temporary concrete washout facilities are no longer required for the work,the hardened concrete should be removed and properly disposed or recycled in accordance with federal, state or local regulations. Materials used to construct temporary concrete washout facilities should be removed from the site of the work and properly disposed or recycled in accordance with federal, state or local regulations. ■ Holes, depressions or other ground disturbance caused by the removal of the temporary concrete washout facilities should be backfilled and repaired. Costs All of the above are low cost measures. Roll-off concrete washout facilities can be more costly than other measures due to removal and replacement; however, provide a cleaner alternative to traditional washouts. The type of washout facility, size, and availability of materials will determine the cost of the washout. Inspection and Maintenance ■ BMPs must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. ■ Temporary concrete washout facilities should be maintained to provide adequate holding capacity with a minimum freeboard of 4 in.for above grade facilities and 12 in. for below grade facilities. Maintaining temporary concrete washout facilities should include removing and disposing of hardened concrete and returning the facilities to a functional condition. Hardened concrete materials should be removed and properly disposed or recycled in accordance with federal, state or local regulations. ■ Washout facilities must be cleaned, or new facilities must be constructed and ready for use once the washout is 75%full. ■ Inspect washout facilities for damage (e.g. torn liner, evidence of leaks, signage, etc.). Repair all identified damage. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Stormwater Quality Handbooks -Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation(Caltrans),November 2000, Updated March 2003. Stormwater Management for Construction Activities; Developing Pollution Prevention Plans and Best Management Practice, EPA 832-R-92oo5; USEPA,April 1992. December 2019 CASQA BMP Handbook 5 of 7 Construction www.casqa.org Concrete Waste Management WM-8 LATH & 10' FLAGGING ON ALL MIN SANDBAG SIDES 0 0 BERM \ O 0 LiLi\ \ U U /r{ U 0 , SANDBAG 10 MIL PLASTIC LINING LJ 0 kA C AA > \ n C � . / \ BERM O f O f ) SECTION A-A 10 MIL NOT TO SCALE PLASTIC LINING PLAN NOT TO SCALE TYPE "BELOW GRADE" 10 MIL PLASTIC LINING 10' d , MIN 117A It —I FASTENED FRAME SECURELY FASTENED AROUND w ENTIRETWOSTAKES PERIMETER WITH E > SECTION B-B NOT TO SCALE STAKE (TYP) 10 MIL NOTES TWO—STACKED PLASTIC LINING 2 X 12 ROUGH 1. ACTUAL LAYOUT DETERMINED WOOD FRAME PLAN IN FIELD. NOT TO SCALE 2. THE CONCRETE WASHOUT SIGN TYPE "ABOVE GRADE" SHALL BE INSTALLED WITHIN 30 FT. OF THE TEMPORARY CONCRETE WASHOUT FACILITY. December 2019 CASQA BMP Handbook 6 of 7 Construction www.casqa.org Concrete Waste Management WM-8 1 0' MIN e e e e e e STAKE . (TYP) 2" . �, '�' ki-' 3 4 . 1/8" DIA. fi Q STEEL WIRE 4 > . . STAPLE DETAIL . . f me moor me STRAW BALE 10 MIL (TYP) PLYWOOD PLASTIC LINING PLAN 48" X 24" NOT TO SCALE PAINTED WHITE TYPE "ABOVE GRADE" WITH STRAW BALES CONCRETE BLACK LETTERS WASHOU 6" HEIGHT 0.5" LAG .j SCREWS 3' ICI WOOD POST _ -. I 3 X 3" X 8' 3' CONCRETE WASHOUT SIGN DETAIL (OR EQUIVALENT) STAPLES (2 PER BALE) 10 MIL BINDING WIRE PLASTIC LINING STRAW BALE WOOD OR NOTES NATIVE MATERIAL METAL STAKES (OPTIONAL) (2 PER BALE) 1. ACTUAL LAYOUT DETERMINED IN FIELD. SECTION B-B 2. THE CONCRETE WASHOUT SIGN NOT TO SCALE SHALL BE INSTALLED WITHIN 30 FT. OF THE TEMPORARY CONCRETE WASHOUT FACILITY. December 2019 CASQA BMP Handbook 7 of 7 Construction www.casqa.org Sanitary/Septic Waste Management WM-9 Categories EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control O NS Non-Stormwater � Management Control WM Waste Management and Q r 0 ; Materials Pollution Control .mi / % Legend: Y 0 Primary Category ❑x Secondary Category Description and Purpose Targeted Constituents Proper sanitary and septic waste management prevent the Sediment discharge of pollutants to stormwater from sanitary and septic Nutrients 0 waste by providing convenient,well-maintained facilities, and Trash p arranging for regular service and disposal. Metals Suitable Applications Bacteria 0 Sanitary septic waste management practices are suitable for use Oil and Grease at all construction sites that use temporary or portable sanitary Organics 0 and septic waste systems. Limitations Potential Alternatives None identified. None Implementation Sanitary or septic wastes should be treated or disposed of in accordance with state and local requirements. In many cases, If User/Subscriber modifies this fact one contract with a local facility supplier will be all that it takes sheet in any way,the CASQA to make sure sanitary wastes are properly disposed. name/logo and footer below must be removed from each page and not Storage and Disposal Procedures appear on the modified version. • Temporary sanitary facilities should be located away from drainage facilities,watercourses, and from traffic circulation. If site conditions allow,place portable facilities a minimum of 5o feet from drainage conveyances and traffic areas.When subjected to high winds or risk of high winds,temporary sanitary facilities should be secured to prevent overturning. CASQA CAI I I Olt NIA S I'OIL I1 VV_.VT I It December 2019 CASQA BMP Handbook 1 of 3 Construction www.casqa.org Sanitary/Septic Waste Management WM-9 • Temporary sanitary facilities must be equipped with containment to prevent discharge of pollutants to the stormwater drainage system of the receiving water. • Consider safety as well as environmental implications before placing temporary sanitary facilities. • Wastewater should not be discharged or buried within the project site. • Sanitary and septic systems that discharge directly into sanitary sewer systems,where permissible, should comply with the local health agency, city,county, and sewer district requirements. • Only reputable,licensed sanitary and septic waste haulers should be used. • Sanitary facilities should be located in a convenient location. • Temporary septic systems should treat wastes to appropriate levels before discharging. • If using an onsite disposal system(OSDS), such as a septic system,local health agency requirements must be followed. • Temporary sanitary facilities that discharge to the sanitary sewer system should be properly connected to avoid illicit discharges. • Sanitary and septic facilities should be maintained in good working order by a licensed service. • Regular waste collection by a licensed hauler should be arranged before facilities overflow. • If a spill does occur from a temporary sanitary facility,follow federal,state and local regulations for containment and clean-up. Education • Educate employees, subcontractors, and suppliers on sanitary and septic waste storage and disposal procedures. • Educate employees, subcontractors, and suppliers of potential dangers to humans and the environment from sanitary and septic wastes. • Instruct employees, subcontractors, and suppliers in identification of sanitary and septic waste. • Hold regular meetings to discuss and reinforce the use of sanitary facilities(incorporate into regular safety meetings). • Establish a continuing education program to indoctrinate new employees. Costs All of the above are low cost measures. December 2019 CASQA BMP Handbook 2 of 3 Construction www.casqa.org Sanitary/Septic Waste Management WM-9 Inspection and Maintenance • BMPs must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. • Arrange for regular waste collection. • If high winds are expected,portable sanitary facilities must be secured with spikes or weighed down to prevent over turning. • If spills or leaks from sanitary or septic facilities occur that are not contained and discharge from the site, non-visible sampling of site discharge may be required. Refer to the General Permit or to your project specific Construction Site Monitoring Plan to determine if and where sampling is required. References Stormwater Quality Handbooks -Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation(Caltrans), March 2003. Stormwater Management for Construction Activities; Developing Pollution Prevention Plans and Best Management Practice, EPA 832-R-92oo5; USEPA,April 1992. December 2019 CASQA BMP Handbook 3 of 3 Construction www.casqa.org Scheduling EC- 1 v Categories P� FR�oP EC Erosion Control IX° ItkVl°� SE Sediment Control ❑x v ��oNEs�P TC Tracking Control ❑x ���SOPv tl?-�oN WE Wind Erosion Control Mo ❑x Non-Stormwater Mo.00 �° NS Management Control G`aa\� Waste Management and WM Materials Pollution Control Sk.a1'6 odes°\ 1 6 Legend: Primary Objective 6Sca \ero� ❑x Secondary Objective �, \� e sea\\ Eco gyres 3 23 22 12 Targeted Constituents Description and Purpose Sediment Scheduling is the development of a written plan that includes Nutrients sequencing of construction activities and the implementation of Trash BMPs such as erosion control and sediment control while Metals taking local climate (rainfall,wind, etc.) into consideration. Bacteria The purpose is to reduce the amount and duration of soil exposed to erosion by wind, rain, runoff, and vehicle tracking, Oil and Grease and to perform the construction activities and control practices Organics in accordance with the planned schedule. Suitable Applications Potential Alternatives Proper sequencing of construction activities to reduce erosion None potential should be incorporated into the schedule of every construction project especially during rainy season. Use of other, more costly yet less effective, erosion and sediment control BMPs may often be reduced through proper construction sequencing. If User/Subscriber modifies this fact Limitations sheet in any way,the CASQA name/logo and footer below must be • Environmental constraints such as nesting season removed from each page and not prohibitions reduce the full capabilities of this BMP. appear on the modified version. Implementation • Avoid rainy periods. Schedule major grading operations during dry months when practical. Allow enough time before rainfall begins to stabilize the soil with vegetation or physical means or to install sediment trapping devices. • Plan the project and develop a schedule showing each phase CASQA of construction. Clearly show how the rainy season relates (,\I.IF(7R\IA STOR\II\'4TFR December 2019 CASQA BMP Handbook 1 of 3 Construction www.casqa.org Scheduling EC- 1 to soil disturbing and re-stabilization activities. Incorporate the construction schedule into the SWPPP. • Include on the schedule,details on the rainy season implementation and deployment of: - Erosion control BMPs - Sediment control BMPs - Tracking control BMPs - Wind erosion control BMPs - Non-stormwater BMPs - Waste management and materials pollution control BMPs • Include dates for activities that may require non-stormwater discharges such as dewatering, sawcutting, grinding, drilling,boring, crushing,blasting,painting,hydro-demolition,mortar mixing,pavement cleaning, etc. • Work out the sequencing and timetable for the start and completion of each item such as site clearing and grubbing, grading, excavation,paving,foundation pouring utilities installation, etc.,to minimize the active construction area during the rainy season. - Sequence trenching activities so that most open portions are closed before new trenching begins. - Incorporate staged seeding and re-vegetation of graded slopes as work progresses. - Schedule establishment of permanent vegetation during appropriate planting time for specified vegetation. • Non-active areas should be stabilized as soon as practical after the cessation of soil disturbing activities or one day prior to the onset of precipitation. • Monitor the weather forecast for rainfall. • When rainfall is predicted, adjust the construction schedule to allow the implementation of soil stabilization and sediment treatment controls on all disturbed areas prior to the onset of rain. • Be prepared year-round to deploy erosion control and sediment control BMPs. Erosion may be caused during dry seasons by un-seasonal rainfall,wind, and vehicle tracking. Keep the site stabilized year-round and retain and maintain rainy season sediment trapping devices in operational condition. • Apply permanent erosion control to areas deemed substantially complete during the project's defined seeding window. • Avoid soil disturbance during periods with high wind velocities. Costs Construction scheduling to reduce erosion may increase other construction costs due to reduced economies of scale in performing site grading. The cost effectiveness of scheduling techniques December 2019 CASQA BMP Handbook 2 of 3 Construction www.casqa.org Scheduling EC- 1 should be compared with the other less effective erosion and sedimentation controls to achieve a cost-effective balance. Inspection and Maintenance • Verify that work is progressing in accordance with the schedule. If progress deviates,take corrective actions. • Amend the schedule when changes are warranted. • Amend the schedule prior to the rainy season to show updated information on the deployment and implementation of construction site BMPs. References Stormwater Quality Handbooks Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation(Caltrans),November 2000. Stormwater Management for Construction Activities Developing Pollution Prevention Plans and Best Management Practices (EPA 832-R-92-o05), U.S. Environmental Protection Agency, Office of Water, September 1992. December 2019 CASQA BMP Handbook 3 of 3 Construction www.casqa.org Preservation of Existing Vegetation EC-2 Categories EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control Non-Stormwater .,� NS Management Control 41.0,1011.40.411411 WM Waste Management and Materials Pollution Control / Legend: II ---41111111111111111. Q Primary Objective 111140 111110 ❑x Secondary Objective 0. Targeted Constituents Description and Purpose Sediment Q Carefully planned preservation of existing vegetation minimizes Nutrients the potential of removing or injuring existing trees,vines, Trash shrubs, and grasses that protect soil from erosion. Metals Suitable Applications Bacteria Preservation of existing vegetation is suitable for use on most Oil and Grease projects. Large project sites often provide the greatest Organics opportunity for use of this BMP. Suitable applications include the following: Potential Alternatives • Areas within the site where no construction activity occurs None or occurs at a later date. This BMP is especially suitable to multi year projects where grading can be phased. • Areas where natural vegetation exists and is designated for preservation. Such areas often include steep slopes, watercourse, and building sites in wooded areas. If• Areas where local, state, and federal government require sheet User/Subscriberinanwy, modifies this fact in any way,the CASQA preservation, such as vernal pools,wetlands, marshes, name/logo and footer below must be certain oak trees, etc. These areas are usually designated on removed from each page and not the plans, or in the specifications, permits, or appear on the modified version. environmental documents. • Where vegetation designated for ultimate removal can be temporarily preserved and be utilized for erosion control and sediment control. • Protecting existing vegetation buffers and swales. CASQA ,,,JrORVILA sr(lRVK7\TrR December 2019 CASQA BMP Handbook 1 of 4 Construction www.casqa.org Preservation of Existing Vegetation EC-2 Limitations • Requires forward planning by the owner/developer, contractor, and design staff. • Limited opportunities for use when project plans do not incorporate existing vegetation into the site design. • For sites with diverse topography,it is often difficult and expensive to save existing trees while grading the site satisfactory for the planned development. Implementation The best way to prevent erosion is to not disturb the land. In order to reduce the impacts of new development and redevelopment,projects may be designed to avoid disturbing land in sensitive areas of the site(e.g., natural watercourses,steep slopes), and to incorporate unique or desirable existing vegetation into the site's landscaping plan. Clearly marking and leaving a buffer area around these unique areas during construction will help to preserve these areas as well as take advantage of natural erosion prevention and sediment trapping. Existing vegetation to be preserved on the site must be protected from mechanical and other injury while the land is being developed. The purpose of protecting existing vegetation is to ensure the survival of desirable vegetation for shade,beautification, and erosion control. Mature vegetation has extensive root systems that help to hold soil in place,thus reducing erosion. In addition,vegetation helps keep soil from drying rapidly and becoming susceptible to erosion. To effectively save existing vegetation, no disturbances of any kind should be allowed within a defined area around the vegetation. For trees,no construction activity should occur within the drip line of the tree. Timing • Provide for preservation of existing vegetation prior to the commencement of clearing and grubbing operations or other soil disturbing activities in areas where no construction activity is planned or will occur at a later date. Design and Layout • Mark areas to be preserved with temporary fencing. Include sufficient setback to protect roots. — Orange colored plastic mesh fencing works well. — Use appropriate fence posts and adequate post spacing and depth to completely support the fence in an upright position. • Locate temporary roadways, stockpiles, and layout areas to avoid stands of trees, shrubs, and grass. • Consider the impact of grade changes to existing vegetation and the root zone. • Maintain existing irrigation systems where feasible. Temporary irrigation may be required. • Instruct employees and subcontractors to honor protective devices. Prohibit heavy equipment,vehicular traffic, or storage of construction materials within the protected area. December 2019 CASQA BMP Handbook 2 of 4 Construction www.casqa.org Preservation of Existing Vegetation EC-2 • Consider pruning or mowing vegetation instead of removing it to allow for regrowth. • If possible,retain vegetation buffer around the site and adjacent waterways. Costs There is little cost associated with preserving existing vegetation if properly planned during the project design, and these costs may be offset by aesthetic benefits that enhance property values. During construction,the cost for preserving existing vegetation will likely be less than the cost of applying erosion and sediment controls to the disturbed area. Replacing vegetation inadvertently destroyed during construction can be extremely expensive,sometimes in excess of $io,000 per tree. Inspection and Maintenance During construction,the limits of disturbance should remain clearly marked at all times. Irrigation or maintenance of existing vegetation should be described in the landscaping plan. If damage to protected trees still occurs, maintenance guidelines described below should be followed: • Verify that protective measures remain in place. Restore damaged protection measures immediately. • Serious tree injuries shall be attended to by an arborist. • Damage to the crown,trunk, or root system of a retained tree shall be repaired immediately. • Trench as far from tree trunks as possible,usually outside of the tree drip line or canopy. Curve trenches around trees to avoid large roots or root concentrations. If roots are encountered,consider tunneling under them. When trenching or tunneling near or under trees to be retained,place tunnels at least 18 in.below the ground surface, and not below the tree center to minimize impact on the roots. • Do not leave tree roots exposed to air. Cover exposed roots with soil as soon as possible. If soil covering is not practical,protect exposed roots with wet burlap or peat moss until the tunnel or trench is ready for backfill. • Cleanly remove the ends of damaged roots with a smooth cut. • Fill trenches and tunnels as soon as possible. Careful filling and tamping will eliminate air spaces in the soil,which can damage roots. • If bark damage occurs, cut back all loosened bark into the undamaged area,with the cut tapered at the top and bottom and drainage provided at the base of the wood. Limit cutting the undamaged area as much as possible. • Aerate soil that has been compacted over a trees root zone by punching holes 12 in. deep with an iron bar and moving the bar back and forth until the soil is loosened. Place holes 18 in. apart throughout the area of compacted soil under the tree crown. • Fertilization: December 2019 CASQA BMP Handbook 3 of 4 Construction www.casqa.org Preservation of Existing Vegetation EC-2 - Fertilize trees in the late fall or early spring. Although to note, many native species do not require fertilization. - Apply fertilizer to the soil over the feeder roots and in accordance with label instructions, but never closer than 3 ft to the trunk. Increase the fertilized area by one-fourth of the crown area for conifers that have extended root systems. • Retain protective measures until all other construction activity is complete to avoid damage during site cleanup and stabilization. References County of Sacramento Tree Preservation Ordinance, September 1981. Stormwater Quality Handbooks Construction Site Best Management Practices(BMPs)Manual, State of California Department of Transportation(Caltrans),November 2000. Stormwater Management of the Puget Sound Basin,Technical Manual, Publication #91-75, Washington State Department of Ecology, February 1992. Water Quality Management Plan for The Lake Tahoe Region,Volume II, Handbook of Management Practices,Tahoe Regional Planning Agency,November 1988. December 2019 CASQA BMP Handbook 4 of 4 Construction www.casqa.org Hydraulic Mulch EC-3 Categories EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control ❑x NS Non-Stormwater Management Control Waste Management and lam WM - Materials Pollution Control Legend: ` \ � Q Primary Category ❑x Secondary Category Targeted Constituents Description and Purpose Sediment p Hydraulic Mulch consists of various types of fibrous materials Nutrients mixed with water and sprayed onto the soil surface in slurry Trash form to provide a layer of temporary protection from wind and Metals water erosion. Bacteria Suitable Applications Oil and Grease Hydraulic mulch as a temporary,stand alone, erosion control Organics BMP is suitable for disturbed areas that require temporary protection from wind and water erosion until permanent soil Potential Alternatives stabilization activities commence. Examples include: EC-4 Hydroseeding • Rough-graded areas that will remain inactive for longer EC-5 Soil Binders than permit-required thresholds (e.g., 14 days)or otherwise require stabilization to minimize erosion or prevent EC-6 Straw Mulch sediment discharges. EC-7 Geotextiles and Mats • Soil stockpiles. EC-8 Wood Mulching EC-14 Compost Blanket • Slopes with exposed soil between existing vegetation such EC-16 Non-Vegetative Stabilization as trees or shrubs. If User/Subscriber modifies this fact • Slopes planted with live,container-grown vegetation or sheet in any way,the CASQA plugs. name/logo and footer below must be removed from each page and not • Slopes burned by wildfire. appear on the modified version. CASQA ...0 WATF1 QUAL1 rY ASiOClAr10N• July 2012 California Stormwater BMP Handbook 1 of 5 Construction www.casqa.org Hydraulic Mulch EC-3 Hydraulic mulch can also be applied to augment other erosion control BMPs such as: • In conjunction with straw mulch (see EC-6 Straw Mulch)where the rate of hydraulic mulch is reduced to 100-500 lbs per acre and the slurry is applied over the straw as a tackifying agent to hold the straw in place. • Supplemental application of soil amendments, such as fertilizer,lime, gypsum, soil bio- stimulants or compost. Limitations In general,hydraulic mulch is not limited by slope length, gradient or soil type. However,the following limitations typically apply: • Most hydraulic mulch applications, particularly bonded fiber matrices (BFMs),require at least 24 hours to dry before rainfall occurs. • Temporary applications (i.e.,without a vegetative component) may require a second application in order to remain effective for an entire rainy season. ■ Treatment areas must be accessible to hydraulic mulching equipment. • Availability of water sources in remote areas for mixing and application. • As a stand-alone temporary BMP,hydraulic mulches may need to be re-applied to maintain their erosion control effectiveness,typically after 6-12 months depending on the type of mulch used. • Availability of hydraulic mulching equipment may be limited just prior to the rainy season and prior to storms due to high demand. • Cellulose fiber mulches alone may not perform well on steep slopes or in course soils. • This BMP consists of a mixture of several constituents (e.g.,fibers/mulches,tackifiers, and other chemical constituents), some of which may be proprietary and may come pre-mixed by the manufacturer. The water quality impacts of these constituents are relatively unknown and some may have water quality impacts due to their chemical makeup. Refer to specific chemical properties identified in the product Material Safety Data Sheet; products should be evaluated for project-specific implementation by the SWPPP Preparer. Refer to factsheet EC-o5 for further guidance on selecting soil binders. Implementation • Where feasible, it is preferable to prepare soil surfaces prior to application by roughening embankments and fill areas with a crimping or punching type roller or by track walking. ■ The majority of hydraulic mulch applications do not necessarily require surface/soil preparation (See EC-15 Soil Preparation) although in almost every case where re-vegetation is included as part of the practice, soil preparation can be beneficial. One of the advantages of hydraulic mulch over other erosion control methods is that it can be applied in areas where soil preparation is precluded by site conditions, such as steep slopes, rocky soils, or inaccessibility. July 2012 California Stormwater BMP Handbook 2 of 5 Construction www.casqa.org Hydraulic Mulch EC-3 • Avoid mulch over spray onto roads, sidewalks, drainage channels, existing vegetation, etc. • Hydraulic mulching is generally performed utilizing specialized machines that have a large water-holding/mixing tank and some form of mechanical agitation or other recirculation method to keep water, mulch and soil amendments in suspension. The mixed hydraulic slurry can be applied from a tower sprayer on top of the machine or by extending a hose to areas remote from the machine. • Where possible apply hydraulic mulch from multiple directions to adequately cover the soil. Application from a single direction can result in shadowing, uneven coverage and failure of the BMP. • Hydraulic mulch can also include a vegetative component, such as seed, rhizomes, or stolons (see EC-4 Hydraulic Seed). • Typical hydraulic mulch application rates range from 2,000 pounds per acre for standard mulches (SMs)to 3,50o pounds per acre for BFMs. However,the required amount of hydraulic mulch to provide adequate coverage of exposed topsoil may appear to exceed the standard rates when the roughness of the soil surface is changed due to soil preparation methods (see EC-15 Soil Preparation) or by slope gradient. • Other factors such as existing soil moisture and soil texture can have a profound effect on the amount of hydraulic mulch required(i.e. application rate) applied to achieve an erosion- resistant covering. • Avoid use of mulch without a tackifier component, especially on slopes. • Mulches used in the hydraulic mulch slurry can include: - Cellulose fiber - Thermally-processed wood fibers - Cotton - Synthetics - Compost (see EC-14, Compost Blanket) • Additional guidance on the comparison and selection of temporary slope stabilization methods is provided in Appendix F of the Handbook. Categories of Hydraulic Mulches Standard Hydraulic Mulch (SM) Standard hydraulic mulches are generally applied at a rate of 2,000 pounds per acre and are manufactured containing around 5%tackifier (i.e. soil binder), usually a plant-derived guar or psyllium type. Most standard mulches are green in color derived from food-color based dyes. July 2012 California Stormwater BMP Handbook 3 of 5 Construction www.casqa.org Hydraulic Mulch EC-3 Hydraulic Matrices(HM) and Stabilized Fiber Matrices (SFM) Hydraulic matrices and stabilized fiber matrices are slurries which contain increased levels of tackifiers/soil binders; usually 10% or more by weight. HMs and SFMs have improved performance compared to a standard hydraulic mulch (SM)because of the additional percentage of tackifier and because of their higher application rates,typically 2,500 — 4,000 pounds per acre. Hydraulic matrices can include a mixture of fibers, for example, a 50/50 blend of paper and wood fiber. In the case of an SFM,the tackifier/soil binder is specified as a polyacrylamide (PAM). Bonded Fiber Matrix (BFM) Bonded fiber matrices (BFMs) are hydraulically-applied systems of fibers, adhesives (typically guar based) and chemical cross-links. Upon drying,the slurry forms an erosion-resistant blanket that prevents soil erosion and promotes vegetation establishment. The cross-linked adhesive in the BFM should be biodegradable and should not dissolve or disperse upon re- wetting. BFMs are typically applied at rates from 3,00o to 4,000 lbs/acre based on the manufacturer's recommendation. BFMs should not be applied immediately before, during or immediately after rainfall or if the soil is saturated. Depending on the product, BFMs typically require 12 to 24 hours to dry and become effective. Mechanically-Bonded Fiber Matrices (MBFM) Mechanically-bonded fiber matrices (MBFMs) are hydraulically applied systems similar to BFM that use crimped synthetic fibers and PAM and are typically applied to a slope at a higher application rate than a standard BFM. Hydraulic Compost Matrix(HCM) Hydraulic compost matrix(HCM) is a field-derived practice whereby finely graded or sifted compost is introduced into the hydraulic mulch slurry. A guar-type tackifier can be added for steeper slope applications as well as any specified seed mixtures. A HCM can help to accelerate seed germination and growth. HCMs are particularly useful as an in-fill for three-dimensional re-vegetation geocomposites, such as turf reinforcement mats (TRM) (see EC-7 Geotextiles and Mats). Costs Average installed costs for hydraulic mulch categories are is provided in Table 1,below. Table 1 HYDRAULIC MULCH BMPs INSTALLED COSTS BMP Installed Cost/Acre Standard Hydraulic Mulching(SM) $1,700-$3,600 per acre Hydraulic Matrices(HM)and Stabilized Fiber Matrices Guar-based $2,000-$4,000 per acre PAM-based $2,500-$5,610 per acre Bonded Fiber Matrix(BFM) $3,900-$6,900 per acre Mechanically Bonded Fiber Matrix(MBFM) $4,500-$6,000 per acre Hydraulic Compost Matrix(HCM) $3,000-$3,500 per acre July 2012 California Stormwater BMP Handbook 4 of 5 Construction www.casqa.org Hydraulic Mulch EC-3 Source: Cost information received from individual product manufacturers solicited by Geosyntec Consultants(2004) Inspection and Maintenance • Maintain an unbroken,temporary mulched ground cover throughout the period of construction when the soils are not being reworked. • BMPs must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. • Areas where erosion is evident should be repaired and BMPs re-applied as soon as possible. Care should be exercised to minimize the damage to protected areas while making repairs, as any area damaged will require re-application of BMPs. ■ Compare the number of bags or weight of applied mulch to the area treated to determine actual application rates and compliance with specifications. References Soil Stabilization BMP Research for Erosion and Sediment Controls: Cost Survey Technical Memorandum, State of California Department of Transportation (Caltrans), July 2007. Controlling Erosion of Construction Sites,Agricultural Information #347, U.S. Department of Agriculture (USDA),Natural Resources Conservation Service(NRCS) (formerly Soil Conservation Service— SCS). Guides for Erosion and Sediment Control in California, USDA Soils Conservation Service, January 1991. Manual of Standards of Erosion and Sediment Control Measures,Association of Bay Area Governments,May 1995. Sedimentation and Erosion Control,An Inventory of Current Practices Draft, US EPA,April 199o. Soil Erosion by Water,Agriculture Information Bulletin #513, U.S. Department of Agriculture, Soil Conservation Service. Stormwater Quality Handbooks Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation(Caltrans), March 2003. Guidance Document: Soil Stabilization for Temporary Slopes, State of California Department of Transportation (Caltrans),November 1999 Stormwater Management of the Puget Sound Basin,Technical Manual, Publication #91-75, Washington State Department of Ecology, February 1992. Water Quality Management Plan for the Lake Tahoe Region,Volume II, Handbook of Management Practices,Tahoe Regional Planning Agency,November 1988. July 2012 California Stormwater BMP Handbook 5 of 5 Construction www.casqa.org Water Conservation Practices NS- 1 Categories EC Erosion Control ❑x SE Sediment Control ❑x TC Tracking Control WE Wind Erosion Control ih,,, _t .__ �`" NS Non-Stormwater 0 .� Management Control illi>..7 \) Waste Management and Materials Pollution Control WM Legend: Q Primary Objective 0 Secondary Objective .A Targeted Constituents Description and Purpose Sediment 0 Water conservation practices are activities that use water Nutrients during the construction of a project in a manner that avoids Trash causing erosion and the transport of pollutants offsite. These Metals practices can reduce or eliminate non-stormwater discharges. Bacteria Suitable Applications Oil and Grease Water conservation practices are suitable for all construction Organics sites where water is used, including piped water,metered water,trucked water, and water from a reservoir. Potential Alternatives Limitations None ■ None identified. Implementation • Keep water equipment in good working condition. • Stabilize water truck filling area. If User/Subscriber modifies this fact sheet in any way,the CASQA ■ Repair water leaks promptly. name/logo and footer below must be removed from each page and not • Washing of vehicles and equipment on the construction site appear on the modified version. is discouraged. • Avoid using water to clean construction areas. If water must be used for cleaning or surface preparation, surface should be swept and vacuumed first to remove dirt. This will minimize amount of water required. C SQA January 2011 California Stormwater BMP Handbook 1 of 2 Construction www.casqa.org Water Conservation Practices NS- 1 • Direct construction water runoff to areas where it can soak into the ground or be collected and reused. • Authorized non-stormwater discharges to the storm drain system, channels, or receiving waters are acceptable with the implementation of appropriate BMPs. • Lock water tank valves to prevent unauthorized use. Costs The cost is small to none compared to the benefits of conserving water. Inspection and Maintenance • Inspect and verify that activity based BMPs are in place prior to the commencement of authorized non-stormwater discharges. • Inspect BMPs in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. ■ Inspect BMPs subject to non-stormwater discharges daily while non-stormwater discharges are occuring. ■ Repair water equipment as needed to prevent unintended discharges. - Water trucks - Water reservoirs (water buffalos) - Irrigation systems - Hydrant connections References Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans),November 2000. January 2011 California Stormwater BMP Handbook 2 of 2 Construction www.casqa.org Dewatering Operations NS-2 Categories --S,,,, EC Erosion Control -414111.:0701111 l-II ---____—____:, SE Sediment Control El Tracking Control WE Wind Erosion Control ' `~�, ��' NS Non-Stormwater Q NI Management Control wm Waste Management and 111 ' Materials Pollution Control Legend: � 0 Primary Category ❑k Secondary Category Description and Purpose Targeted Constituents Dewatering operations are practices that manage the discharge Sediment a of pollutants when non-stormwater and accumulated Nutrients precipitation(stormwater) must be removed from a work Trash location to proceed with construction work or to provide vector Metals control. Bacteria The General Permit incorporates Numeric Action Levels (NAL) Oil and Grease 0 for turbidity(see Section 2 of this handbook to determine your Organics project's risk level and if you are subject to these requirements). Potential Alternatives Discharges from dewatering operations can contain high levels SE-5: Fiber Roll of fine sediment that, if not properly treated, could lead to exceedances of the General Permit requirements or Basin Plan SE-6:Gravel Bag Berm standards. If User/Subscriber modifies this fact The dewatering operations described in this fact sheet are not sheet in any way,the CASQA Active Treatment Systems(ATS) and do not include the use of name/logo and footer below must be chemical coagulations, chemical flocculation or removed from each page and not electrocoagulation. appear on the modified version. Suitable Applications These practices are implemented for discharges of non- stormwater from construction sites. Non-stormwaters include, but are not limited to, groundwater,water from cofferdams, water diversions, and waters used during construction activities that must be removed from a work area to facilitate construction. Practices identified in this section are also appropriate for implementation when managing the removal of accumulated CASQA CALIFORNIA STORMWATER I?l \III\ \t10l I_\H ION December 2019 CASQA BMP Handbook 1 of 10 Construction www.casqa.org Dewatering Operations NS-2 precipitation(stormwater)from depressed areas at a construction site. Stormwater mixed with non-stormwater should be managed as non-stormwater. Limitations ■ Dewatering operations will require and should comply with applicable local and project- specific permits and regulations. In some areas, all dewatering activities, regardless of the discharge volume,require a dewatering permit. ■ Site conditions will dictate design and use of dewatering operations. • The controls discussed in this fact sheet primarily address sediment. Other secondary pollutant removal benefits are discussed where applicable. • The controls detailed in this fact sheet only allow for minimal settling time for sediment particles. Use only when site conditions restrict the use of the other control methods. • Avoid dewatering discharges where possible by using the water for dust control. Implementation • A Construction Site Monitoring Plan(CSMP) should be included in the project Stormwater Pollution Prevention Plan (SWPPP). ■ Regional Water Quality Control Board(RWQCB) Regions may require notification and approval prior to any discharge of water from construction sites. • The destination of discharge from dewatering activities will typically determine the type of permit required for the discharge. For example,when discharging to a water of the U.S., a dewatering permit may be required through the site's governing RWQCB.When discharging to a sanitary sewer or Municipal Separate Storm Sewer System(MS4), a permit may need to be obtained from the owner of the sanitary sewer or MS4 in addition to obtaining an RWQCB dewatering permit.Additional permits or permissions from other agencies may be required for dewatering cofferdams or diversions. ■ Dewatering discharges should not cause erosion at the discharge point.Appropriate BMPs should be implemented to maintain compliance with all applicable permits. ■ Maintain dewatering records in accordance with all local and project-specific permits and regulations. Sediment Treatment A variety of methods can be used to treat water during dewatering operations. Several devices are presented below and provide options to achieve sediment removal. The sediment particle size and permit or receiving water limitations on sediment or turbidity are key considerations for selecting sediment treatment option(s); in some cases,the use of multiple devices may be appropriate. Use of other enhanced treatment methods (i.e., introduction of chemicals or electric current to enhance flocculation and removal of sediment) must comply with: 1)for storm drain or surface water discharges,the requirements for Active Treatment Systems (see SE-1i); or 2)for sanitary sewer discharges,the requirements of applicable sanitary sewer discharge permits. December 2019 CASQA BMP Handbook 2 of 10 Construction www.casqa.org Dewatering Operations Ns-2 Sediment Basin(see also SE-2) Description: a A sediment basin is a temporary basin with a controlled release structure that is formed by excavation or construction of an embankment to detain sediment-laden runoff and allow sediment to settle out before discharging. Sediment basins are generally larger than Sediment Traps (SE-3) and have a designed outlet structure. Appropriate Applications: • Effective for the removal of trash,gravel, sand, silt, some metals that settle out with the sediment. Implementation: • Excavation and construction of related facilities is required. ■ Temporary sediment basins should be fenced if safety is a concern. a Outlet protection is required to prevent erosion at the outfall location. Maintenance: • Maintenance is required for safety fencing,vegetation, embankment,inlet and outlet, as well as other features. ■ Removal of sediment is required when the storage volume is reduced by one-third. Sediment Trap (See also SE-3) Description: ■ A sediment trap is a temporary basin formed by excavation and/or construction of an earthen embankment across a waterway or low drainage area to detain sediment-laden runoff and allow sediment to settle out before discharging. Sediment traps are generally smaller than Sediment Basins (SE-2) and do not have a designed outlet(but do have a spillway or overflow). Appropriate Applications: Effective for the removal of large and medium sized particles (sand and gravel) and some metals that settle out with the sediment. Implementation: is Excavation and construction of related facilities is required. a Trap inlets should be located to maximize the travel distance to the trap outlet. ■ Use rock or vegetation to protect the trap outlets against erosion. Maintenance: at Maintenance is required for vegetation, embankment,inlet and outfall structures, as well as other features. a Removal of sediment is required when the storage volume is reduced by one-third. December 2019 CASQA BMP Handbook 3 of 10 Construction www.casqa.org Dewatering Operations NS-2 Weir Tanks 411 iiiiilli .--i itotit 04--11 -10100* \ li i- ---'-'*,,, 101 Description: o A weir tank separates water and waste by using weirs. The configuration of the weirs (over and under weirs) maximizes the residence time in the tank and determines the waste to be removed from the water, such as oil,grease, and sediments. Appropriate Applications: a The tank removes trash, some settleable solids (gravel, sand, and silt), some visible oil and grease, and some metals (removed with sediment). To achieve high levels of flow,multiple tanks can be used in parallel. If additional treatment is desired,the tanks can be placed in series or as pre-treatment for other methods. Implementation: a Tanks are delivered to the site by the vendor,who can provide assistance with set-up and operation. a Tank size will depend on flow volume, constituents of concern, and residency period required. Vendors should be consulted to appropriately size tank. a Treatment capacity(i.e.,volume and number of tanks) should provide at a minimum the required volume for discrete particle settling for treatment design flows. Maintenance: e Periodic cleaning is required based on visual inspection or reduced flow. a Oil and grease disposal should be conducted by a licensed waste disposal company. December 2019 CASQA BMP Handbook 4 of 10 Construction www.casqa.org Dewatering Operations NS-2 Dewatering Tanks \ti l k ' 11 . A ‘ •_____:___--------- — it;Ir--.4.—/ {, 278992 cl----- r-.7.---r------, 1 taw— Description: • A dewatering tank removes debris and sediment. Flow enters the tank through the top, passes through a fabric filter, and is discharged through the bottom of the tank. The filter separates the solids from the liquids. Appropriate Applications: • The tank removes trash,gravel, sand, and silt, some visible oil and grease, and some metals (removed with sediment). To achieve high levels of flow, multiple tanks can be used in parallel. If additional treatment is desired,the tanks can be placed in series or as pre- treatment for other methods. Implementation: • Tanks are delivered to the site by the vendor,who can provide assistance with set-up and operation. • Tank size will depend on flow volume, constituents of concern, and residency period required. Vendors should be consulted to appropriately size tank. Maintenance: • Periodic cleaning is required based on visual inspection or reduced flow. • Oil and grease disposal should be conducted by licensed waste disposal company. December 2019 CASQA BMP Handbook 5 of 10 Construction www.casqa.org Dewatering Operations NS-2 Gravity Bag Filter • , DEWATERING BAG AVAILABLE IN VARIOUS ? (—) SHAPES AND SIZES FOR SEDIMENT CONTAINMENT TIE DOWN eN./ - � 13 STRAPAlrir 111..F0Whi, Place filter WATER PUMP Olt"gravel or PUMP DISCHARGE HOSE FILTERED WATER pavement Description: ■ A gravity bag filter, also referred to as a dewatering bag,is a square or rectangular bag made of non-woven geotextile fabric that collects gravel, sand, silt, and fines. Appropriate Applications: ■ Effective for the removal of sediments (gravel, sand,silt, and fines). Some metals are removed with the sediment. Implementation: • Water is pumped into one side of the bag and seeps through the top,bottom, and sides of the bag. • Place filter bag on pavement or a gravel bed or paved surface. Avoid placing a dewatering bag on unprotected bare soil. If placing the bag on bare soil is unavoidable, a secondary barrier should be used, such as a rock filter bed placed beneath and beyond the edges of the bag to,prevent erosion and capture sediments that escape the bag. ■ Perimeter control around the downstream end of the bag should be implemented. Secondary sediment controls are important especially in the initial stages of discharge,which tend to allow fines to pass through the bag. Maintenance: ■ Inspection of the flow conditions,bag condition,bag capacity, and the secondary barrier(as applicable)is required. ■ Replace the bag when it no longer filters sediment or passes water at a reasonable rate. ■ Caution should be taken when removing and disposing of the bag,to prevent the release of captured sediment • Properly dispose of the bag offsite. If sediment is removed from the bag prior to disposal (bags can potentially be reused depending upon their condition), dispose of sediment in accordance with the general maintenance procedures described at the end of this BMP Fact Sheet. December 2019 CASQA BMP Handbook 6 of 10 Construction www.casqa.org Dewatering Operations NS-2 Sand Media Particulate Filter _J low Ait ..' r r,.,„4“N ,,;.;,N MINN tag Description: • Water is treated by passing it through canisters filled with sand media. Generally, sand filters provide a final level of treatment. They are often used as a secondary or higher level of treatment after a significant amount of sediment and other pollutants have been removed using other methods. Appropriate Applications: • Effective for the removal of trash, gravel, sand, and silt and some metals, as well as the reduction of biochemical oxygen demand(BOD) and turbidity. • Sand filters can be used for stand-alone treatment or in conjunction with bag and cartridge filtration if further treatment is required. • Sand filters can also be used to provide additional treatment to water treated via settling or basic filtration. Implementation: • The filters require delivery to the site and initial set up. The vendor can provide assistance with installation and operation. Maintenance: • The filters require regular service to monitor and maintain the level of the sand media. If subjected to high loading rates,filters can plug quickly. • Venders generally provide data on maximum head loss through the filter. The filter should be monitored daily while in use and cleaned when head loss reaches target levels. • If cleaned by backwashing, the backwash water may need to be hauled away for disposal or returned to the upper end of the treatment train for another pass through the series of dewatering BMPs. December 2019 CASQA BMP Handbook 7 of 10 Construction www.casqa.org Dewatering Operations NS-2 Pressurized Bag Filter 1I 1 tf' Description: • A pressurized bag filter is a unit composed of single filter bags made from polyester felt material. The water filters through the unit and is discharged through a header. Vendors provide bag filters in a variety of configurations. Some units include a combination of bag filters and cartridge filters for enhanced contaminant removal. Appropriate Applications: • Effective for the removal of sediment(sand and silt) and some metals, as well as the reduction of BOD,turbidity, and hydrocarbons. Oil absorbent bags are available for hydrocarbon removal. • Filters can be used to provide secondary treatment to water treated via settling or basic filtration. Implementation: • The filters require delivery to the site and initial set up. The vendor can provide assistance with installation and operation. Maintenance: • The filter bags require replacement when the pressure differential equals or exceeds the manufacturer's recommendation. December 2019 CASQA BMP Handbook 8 of 10 Construction www.casqa.org Dewatering Operations NS-2 Cartridge Filter • fi Description: • Cartridge filters provide a high degree of pollutant removal by utilizing a number of individual cartridges as part of a larger filtering unit. They are often used as a secondary or higher(polishing)level of treatment after a significant amount of sediment and other pollutants are removed. Units come with various cartridge configurations (for use in series with bag filters) or with a larger single cartridge filtration unit(with multiple filters within). Appropriate Applications: • Effective for the removal of sediment(sand, silt, and some clays) and metals, as well as the reduction of BOD, turbidity, and hydrocarbons. Hydrocarbons can effectively be removed with special resin cartridges. • Filters can be used to provide secondary treatment to water treated via settling or basic filtration. Implementation: • The filters require delivery to the site and initial set up. The vendor can provide assistance. Maintenance: • The cartridges require replacement when the pressure differential equals or exceeds the manufacturer's recommendation. Costs • Sediment control costs vary considerably depending on the dewatering and sediment treatment system that is selected. Pressurized filters tend to be more expensive than gravity settling but are often more effective. Simple tanks are generally rented on a long-term basis (one or more months) and can range from $46o per month for a i,000-gallon tank to $3,40o per month for a 10,000-gallon tank(adjusted for inflation, 2016 dollars,by Tetra Tech Inc.). Mobilization and demobilization costs vary considerably. Inspection and Maintenance • Inspect and verify that dewatering BMPs are in place and functioning prior to the commencement of activities requiring dewatering. • Inspect dewatering BMPs daily while dewatering activities are being conducted. December 2019 CASQA BMP Handbook 9 of 10 Construction www.casqa.org Dewatering Operations Ns-2 ■ Inspect all equipment before use. Monitor dewatering operations to ensure they do not cause offsite discharge or erosion. ■ Sample dewatering discharges as required by the General Permit. ■ Unit-specific maintenance requirements are included with the description of each unit. ■ Sediment removed during the maintenance of a dewatering device maybe either spread onsite and stabilized or disposed of at a disposal site as approved by the owner. ■ Sediment that is commingled with other pollutants should be disposed of in accordance with all applicable laws and regulations and as approved by the owner. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Stormwater Quality Handbooks-Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation(Caltrans), March 2003; Updated March 2004. Stormwater Management for Construction Activities, Developing Pollution Prevention Plans and Best Management Practices, EPA 832-R-92oo5; USEPA,April 1992. Labor Surcharge&Equipment Rental Rates,April 1, 2002 through March 31, 2003, California Department of Transportation (Caltrans). Erosion and Sediment Control Manual, Oregon Department of Environmental Quality, February 2005. December 2019 CASQA BMP Handbook 10 of 10 Construction www.casqa.org Dewatering Operations NS-2 ■ Inspect all equipment before use. Monitor dewatering operations to ensure they do not cause offsite discharge or erosion. ■ Sample dewatering discharges as required by the General Permit. ■ Unit-specific maintenance requirements are included with the description of each unit. ■ Sediment removed during the maintenance of a dewatering device maybe either spread onsite and stabilized or disposed of at a disposal site as approved by the owner. ■ Sediment that is commingled with other pollutants should be disposed of in accordance with all applicable laws and regulations and as approved by the owner. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Stormwater Quality Handbooks -Construction Site Best Management Practices (BMPs)Manual, State of California Department of Transportation(Caltrans), March 2003; Updated March 2004. Stormwater Management for Construction Activities, Developing Pollution Prevention Plans and Best Management Practices, EPA 832-R-92oo5; USEPA,April 1992. Labor Surcharge&Equipment Rental Rates,April 1, 2002 through March 31, 2003, California Department of Transportation(Caltrans). Erosion and Sediment Control Manual, Oregon Department of Environmental Quality, February 2005. December 2019 CASQA BMP Handbook 10 of 10 Construction www.casqa.org Paving and Grinding Operations NS-3 Categories EC Erosion Control SE Sediment Control TC Tracking Control JIILØ . WE Wind Erosion Control NS t i. Management Control WM Waste Management and ❑x ' l Materials Pollution Control r, Legend: 0 Primary Category A ❑x Secondary Category Targeted Constituents Description and Purpose Sediment 0 Prevent or reduce the discharge of pollutants from paving Nutrients operations,using measures to prevent runon and runoff Trash pollution,properly disposing of wastes, and training employees and subcontractors. Metals Bacteria The General Permit incorporates Numeric Action Levels (NAL) Oil and Grease 0 for pH and turbidity(see Section 2 of this handbook to Organics determine your project's risk level and if you are subject to these requirements). Potential Alternatives Many types of construction materials associated with paving None and grinding operations,including mortar, concrete, and cement and their associated wastes have basic chemical properties that can raise pH levels outside of the permitted range. Additional care should be taken when managing these If User/Subscriber modifies this fact materials to prevent them from coming into contact with sheet in any way,the CASQA stormwater flows,which could lead to exceedances of the name/logo and footer below must be General Permit requirements. removed from each page and not appear on the modified version. Suitable Applications These procedures are implemented where paving, surfacing, resurfacing, or sawcutting, may pollute stormwater runoff or discharge to the storm drain system or watercourses. Limitations • Paving opportunities may be limited during wet weather. Discharges of freshly paved surfaces may raise pH to environmentally harmful levels and trigger permit CASQA violations. C A111(11iN I:\S 10 RMb VA'I I;It December 2019 CASQA BMP Handbook 1 of 5 Construction www.casqa.org Paving and Grinding Operations NS-3 Implementation General • Avoid paving during the wet season when feasible. • Reschedule paving and grinding activities if rain is forecasted. • Train employees and sub-contractors in pollution prevention and reduction. • Store materials away from drainage courses to prevent stormwater runon(see WM-1, Material Delivery and Storage). • Protect drainage courses,particularly in areas with a grade,by employing BMPs to divert runoff or to trap and filter sediment. • Stockpile material removed from roadways away from drain inlets, drainage ditches, and watercourses. These materials should be stored consistent with WM-3, Stockpile Management. • Disposal of PCC(Portland cement concrete) and AC(asphalt concrete)waste should be in conformance with WM-8, Concrete Waste Management. Saw Cutting, Grinding, and Pavement Removal • Shovel or vacuum saw-cut slurry and remove from site. Cover or barricade storm drains during saw cutting to contain slurry. • When paving involves AC, the following steps should be implemented to prevent the discharge of grinding residue, uncompacted or loose AC,tack coats, equipment cleaners, or unrelated paving materials: - AC grindings,pieces, or chunks used in embankments or shoulder backing should not be allowed to enter any storm drains or watercourses. Install inlet protection and perimeter controls until area is stabilized(i.e. cutting, grinding or other removal activities are complete and loose material has been properly removed and disposed of)or permanent controls are in place. Examples of temporary perimeter controls can be found in EC-9, Earth Dikes and Drainage Swales; SE-1, Silt Fence; SE-5, Fiber Rolls, or SE-13 Compost Socks and Berms - Collect and remove all broken asphalt and recycle when practical. Old or spilled asphalt should be recycled or disposed of properly. • Do not allow saw-cut slurry to enter storm drains or watercourses. Residue from grinding operations should be picked up by a vacuum attachment to the grinding machine, or by sweeping, should not be allowed to flow across the pavement, and should not be left on the surface of the pavement. See also WM-8, Concrete Waste Management, and WM-io, Liquid Waste Management. • Pavement removal activities should not be conducted in the rain. • Collect removed pavement material by mechanical or manual methods. This material may be recycled for use as shoulder backing or base material. December 2019 CASQA BMP Handbook 2 of 5 Construction www.casqa.org Paving and Grinding Operations NS-3 ■ If removed pavement material cannot be recycled,transport the material back to an approved storage site. Asphaltic Concrete Paving ■ If paving involves asphaltic cement concrete,follow these steps: - Do not allow sand or gravel placed over new asphalt to wash into storm drains, streets, or creeks. Vacuum or sweep loose sand and gravel and properly dispose of this waste by referring to WM-5, Solid Waste Management. - Old asphalt should be disposed of properly. Collect and remove all broken asphalt from the site and recycle whenever possible. Portland Cement Concrete Paving ■ Do not wash sweepings from exposed aggregate concrete into a storm drain system. Collect waste materials by dry methods, such as sweeping or shoveling, and return to aggregate base stockpile or dispose of properly. Allow aggregate rinse to settle. Then, either allow rinse water to dry in a temporary pit as described in WM-8, Concrete Waste Management, or pump the water to the sanitary sewer if authorized by the local wastewater authority. Sealing Operations ■ During chip seal application and sweeping operations,petroleum or petroleum covered aggregate should not be allowed to enter any storm drain or water courses. Apply temporary perimeter controls until structure is stabilized (i.e. all sealing operations are complete and cured and loose materials have been properly removed and disposed). ■ Inlet protection (SE-1o, Storm Drain Inlet Protection) should be used during application of seal coat,tack coat, slurry seal, and fog seal. ■ Seal coat,tack coat, slurry seal, or fog seal should not be applied if rainfall is predicted to occur during the application or curing period. Paving Equipment ■ Leaks and spills from paving equipment can contain toxic levels of heavy metals and oil and grease. Place drip pans or absorbent materials under paving equipment when not in use. Clean up spills with absorbent materials and dispose of in accordance with the applicable regulations. See NS-io,Vehicle and Equipment Maintenance,WM-4, Spill Prevention and Control, and WM-io, Liquid Waste Management. ■ Substances used to coat asphalt transport trucks and asphalt spreading equipment should not contain soap and should be non-foaming and non-toxic. ■ Paving equipment parked onsite should be parked over plastic to prevent soil contamination. ■ Clean asphalt coated equipment offsite whenever possible. When cleaning dry,hardened asphalt from equipment, manage hardened asphalt debris as described in WM-5, Solid Waste Management. Any cleaning onsite should follow NS-8,Vehicle and Equipment Cleaning. December 2019 CASQA BMP Handbook 3 of 5 Construction www.casqa.org Paving and Grinding Operations NS-3 Thermoplastic Striping ■ Thermoplastic striper and pre-heater equipment shutoff valves should be inspected to ensure that they are working properly to prevent leaking thermoplastic from entering drain inlets,the stormwater drainage system, or watercourses. ■ Pre-heaters should be filled carefully to prevent splashing or spilling of hot thermoplastic. Leave six inches of space at the top of the pre-heater container when filling thermoplastic to allow room for material to move. ■ Do not pre-heat,transfer, or load thermoplastic near drain inlets or watercourses. ■ Clean truck beds daily of loose debris and melted thermoplastic. When possible, recycle thermoplastic material. Raised/Recessed Pavement Marker Application and Removal ■ Do not transfer or load bituminous material near drain inlets,the stormwater drainage system, or watercourses. ■ Melting tanks should be loaded with care and not filled to beyond six inches from the top to leave room for splashing. ■ When servicing or filling melting tanks, ensure all pressure is released before removing lids to avoid spills. ■ On large-scale projects, use mechanical or manual methods to collect excess bituminous material from the roadway after removal of markers. Costs ■ All of the above are low cost measures. Inspection and Maintenance ■ Inspect and verify that activity-based BMPs are in place prior to the commencement of paving and grinding operations. ■ BMPs must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. ■ Sample stormwater runoff required by the General Permit. ■ Keep ample supplies of drip pans or absorbent materials onsite. ■ Inspect and maintain machinery regularly to minimize leaks and drips. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. December 2019 CASQA BMP Handbook 4 of 5 Construction www.casqa.org Paving and Grinding Operations NS-3 Hot Mix Asphalt-Paving Handbook AC 150/537o-14,Appendix I, U.S.Army Corps of Engineers, July 1991. Stormwater Quality Handbooks -Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation(Caltrans), March 2003. Erosion and Sediment Control Manual, Oregon Department of Environmental Quality, February 2005. December 2019 CASQA BMP Handbook 5 of 5 Construction www.casqa.org Illicit Connection/ Discharge NS-6 . ,':' .- , Categories EC Erosion Control / <.1 SE Sediment Control .t .,f r.•-`V..,. mitr / , ` TC Tracking Control 11 .... ,y7,.!!: ;.ra ' - .N _r.:.,I. � ' . WE Wind Erosion Control r // Non-Stormwater _ . , - �/ NS Q �•.,rr Management Control S tP. WM Waste Management and Materials Pollution Control .. N.-_ ) .' Legend: Q Primary Objective • f•• ❑X Secondary Objective 1 r Targeted Constituents Description and Purpose Sediment Procedures and practices designed for construction contractors Nutrients Q to recognize illicit connections or illegally dumped or Trash Q discharged materials on a construction site and report incidents. Metals Q Bacteria Q Suitable Applications Oil and Grease Q This best management practice(BMP) applies to all Organics Q construction projects. Illicit connection/discharge and reporting is applicable anytime an illicit connection or discharge is discovered, or illegally dumped material is found Potential Alternatives on the construction site. None Limitations Illicit connections and illegal discharges or dumping, for the purposes of this BMP, refer to discharges and dumping caused If User/Subscriber modifies this fact by parties other than the contractor. If pre-existing hazardous sheet in any way,the CASQA materials or wastes are known to exist onsite,they should be name/logo and footer below must be identified in the SWPPP and handled as set forth in the SWPPP. removed from each page and not appear on the modified version. Implementation Planning ■ Review the SWPPP. Pre-existing areas of contamination should be identified and documented in the SWPPP. ■ Inspect site before beginning the job for evidence of illicit connections, illegal dumping or discharges. Document any pre-existing conditions and notify the owner. CASQA CALIFORNIA STORMWATER Q U,LI I'Y AtiYUCI-\ ON. December 2019 CASQA BMP Handbook 1 of 3 Construction www.casqa.org Illicit Connection/ Discharge NS-6 ■ Inspect site regularly during project execution for evidence of illicit connections, illegal dumping or discharges. ■ Observe site perimeter for evidence for potential of illicitly discharged or illegally dumped material,which may enter the job site. Identification of Illicit Connections and Illegal Dumping or Discharges • General —unlabeled and unidentifiable material should be treated as hazardous. • Solids-Look for debris, or rubbish piles. Solid waste dumping often occurs on roadways with light traffic loads or in areas not easily visible from the traveled way. • Liquids-signs of illegal liquid dumping or discharge can include: - Visible signs of staining or unusual colors to the pavement or surrounding adjacent soils - Pungent odors coming from the drainage systems - Discoloration or oily substances in the water or stains and residues detained within ditches, channels or drain boxes - Abnormal water flow during the dry weather season • Urban Areas- Evidence of illicit connections or illegal discharges is typically detected at storm drain outfall locations or at manholes. Signs of an illicit connection or illegal discharge can include: - Abnormal water flow during the dry weather season - Unusual flows in sub drain systems used for dewatering - Pungent odors coming from the drainage systems - Discoloration or oily substances in the water or stains and residues detained within ditches, channels or drain boxes - Excessive sediment deposits,particularly adjacent to or near active offsite construction projects • Rural Areas-Illicit connections or illegal discharges involving irrigation drainage ditches are detected by visual inspections. Signs of an illicit discharge can include: - Abnormal water flow during the non-irrigation season - Non-standard junction structures - Broken concrete or other disturbances at or near junction structures Reporting Notify the owner of any illicit connections and illegal dumping or discharge incidents at the time of discovery. For illicit connections or discharges to the storm drain system, notify the local stormwater management agency. For illegal dumping, notify the local law enforcement agency. Cleanup and Removal The responsibility for cleanup and removal of illicit or illegal dumping or discharges will vary by location. Contact the local stormwater management agency for further information. December 2019 CASQA BMP Handbook 2 of 3 Construction www.casqa.org Illicit Connection/ Discharge NS-6 Costs Costs to look for and report illicit connections and illegal discharges and dumping are low. The best way to avoid costs associated with illicit connections and illegal discharges and dumping is to keep the project perimeters secure to prevent access to the site,to observe the site for vehicles that should not be there, and to document any waste or hazardous materials that exist onsite before taking possession of the site. Inspection and Maintenance • Inspect and verify that activity-based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect BMPs in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly, prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. • Inspect the site regularly to check for any illegal dumping or discharge. • Prohibit employees and subcontractors from disposing of non-job-related debris or materials at the construction site. • Notify the owner of any illicit connections and illegal dumping or discharge incidents at the time of discovery. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans),November 2000. Stormwater Management for Construction Activities, Developing Pollution Prevention Plans and Best Management Practices, EPA 832-R-92oo5; USEPA,April 1992. December 2019 CASQA BMP Handbook 3 of 3 Construction www.casqa.org Vehicle and Equipment Cleaning NS-8 Categories EC Erosion Control SE Sediment Control TC Tracking Control VEHICLE WE Wind Erosion Control WASH NS Non-Stormwater AREA Id Management Control W MWaste Management and Materials Pollution Control Legend: 0 Primary Objective ❑x Secondary Objective Sump Targeted Constituents Description and Purpose Sediment 0 Vehicle and equipment cleaning procedures and practices Nutrients eliminate or reduce the discharge of pollutants to stormwater Trash from vehicle and equipment cleaning operations. Procedures Metals and practices include but are not limited to: using offsite facilities;washing in designated, contained areas only; Bacteria eliminating discharges to the storm drain by infiltrating the Oil and Grease wash water; and training employees and subcontractors in Organics proper cleaning procedures. Suitable Applications Potential Alternatives These procedures are suitable on all construction sites where None vehicle and equipment cleaning is performed. Limitations Even phosphate-free,biodegradable soaps have been shown to be toxic to fish before the soap degrades. Sending If User/Subscriber modifies this fact vehicles/equipment offsite should be done in conjunction with sheet t away,the CAS name/logo and footer belowA must be TC-1, Stabilized Construction Entrance/Exit. removed from each page and not appear on the modified version. Implementation Other options to washing equipment onsite include contracting with either an offsite or mobile commercial washing business. These businesses may be better equipped to handle and dispose of the wash waters properly. Performing this work offsite can also be economical by eliminating the need for a separate washing operation onsite. If washing operations are to take place onsite,then: CASQA CALIFORNIA STORM WATER QUALITY ASSOCIATION December 2019 CASQA BMP Handbook 1 of 3 Construction www.casqa.org Vehicle and Equipment Cleaning NS-8 ■ Use phosphate-free,biodegradable soaps. ■ Educate employees and subcontractors on pollution prevention measures. ■ Do not permit steam cleaning onsite. Steam cleaning can generate significant pollutant concentrates. ■ Cleaning of vehicles and equipment with soap, solvents or steam should not occur on the project site unless resulting wastes are fully contained and disposed of. Resulting wastes should not be discharged or buried and must be captured and recycled or disposed according to the requirements of WM-io, Liquid Waste Management or WM-6, Hazardous Waste Management, depending on the waste characteristics. Minimize use of solvents. Use of diesel for vehicle and equipment cleaning is prohibited. ■ All vehicles and equipment that regularly enter and leave the construction site must be cleaned offsite. ■ When vehicle and equipment washing and cleaning must occur onsite, and the operation cannot be located within a structure or building equipped with appropriate disposal facilities,the outside cleaning area should have the following characteristics: - Located away from storm drain inlets, drainage facilities, or watercourses - Paved with concrete or asphalt and bermed to contain wash waters and to prevent runon and runoff - Configured with a sump to allow collection and disposal of wash water - No discharge of wash waters to storm drains or watercourses - Used only when necessary ■ When cleaning vehicles and equipment with water: - Use as little water as possible. High-pressure sprayers may use less water than a hose and should be considered - Use positive shutoff valve to minimize water usage - Facility wash racks should discharge to a sanitary sewer, recycle system or other approved discharge system and must not discharge to the storm drainage system, watercourses, or to groundwater Costs Cleaning vehicles and equipment at an offsite facility may reduce overall costs for vehicle and equipment cleaning by eliminating the need to provide similar services onsite. When onsite cleaning is needed,the cost to establish appropriate facilities is relatively low on larger,long- duration projects, and moderate to high on small, short-duration projects. December 2019 CASQA BMP Handbook 2 of 3 Construction www.casqa.org Vehicle and Equipment Cleaning NS-8 Inspection and Maintenance • Inspect and verify that activity-based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect BMPs in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. • Inspect BMPs subject to non-stormwater discharges daily while non-stormwater discharges occur. • Inspection and maintenance is minimal, although some berm repair may be necessary. • Monitor employees and subcontractors throughout the duration of the construction project to ensure appropriate practices are being implemented. • Inspect sump regularly and remove liquids and sediment as needed. • Prohibit employees and subcontractors from washing personal vehicles and equipment on the construction site. References Stormwater Quality Handbooks -Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation(Caltrans),November 2000. Swisher, R.D. Surfactant Biodegradation, Marcel Decker Corporation, 1987. December 2019 CASQA BMP Handbook 3 of 3 Construction www.casqa.org Vehicle and Equipment Fueling NS-9 Categories EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control = 'lm WM Waste Management and V r, Materials Pollution Control . 0 OSCHWI Legend: FUELING O 0 Primary Objective AREA_ ❑p Secondary Objective Targeted Constituents Description and Purpose Sediment Vehicle equipment fueling procedures and practices are Nutrients designed to prevent fuel spills and leaks and reduce or Trash eliminate contamination of stormwater. This can be accomplished by using offsite facilities,fueling in designated Metals areas only, enclosing or covering stored fuel, implementing spill Bacteria controls, and training employees and subcontractors in proper Oil and Grease fueling procedures. Organics Suitable Applications These procedures are suitable on all construction sites where Potential Alternatives vehicle and equipment fueling takes place. None Limitations Onsite vehicle and equipment fueling should only be used where it is impractical to send vehicles and equipment offsite If User/Subscriber modifies this fact for fueling. Sending vehicles and equipment offsite should be sheet in any way,the CASQA done in conjunction with TC-1, Stabilized Construction name/logo and footer below must be Entrance/ Exit. removed from each page and not appear on the modified version. Implementation • Use offsite fueling stations as much as possible. These businesses are better equipped to handle fuel and spills properly. Performing this work offsite can also be economical by eliminating the need for a separate fueling area at a site. • Discourage"topping-off'of fuel tanks. CASQA CAIIIORVI;A SI O101W AIIR December 2019 CASQA BMP Handbook 1 of 3 Construction www.casqa.org Vehicle and Equipment Fueling NS-9 • Absorbent spill cleanup materials and spill kits should be available in fueling areas and on fueling trucks and should be disposed of properly after use. • Drip pans or absorbent pads should be used during vehicle and equipment fueling,unless the fueling is performed over an impermeable surface in a dedicated fueling area. • Use absorbent materials on small spills. Do not hose down or bury the spill. Remove the adsorbent materials promptly and dispose of properly. • Avoid mobile fueling of mobile construction equipment around the site; rather,transport the equipment to designated fueling areas. With the exception of tracked equipment such as bulldozers and large excavators, most vehicles should be able to travel to a designated area with little lost time. • Train employees and subcontractors in proper fueling and cleanup procedures. • When fueling must take place onsite,designate an area away from drainage courses to be used. Fueling areas should be identified in the SWPPP. • Dedicated fueling areas should be protected from stormwater runon and runoff and should be located at least 5o ft away from downstream drainage facilities and watercourses. Fueling must be performed on level-grade areas. • Protect fueling areas with berms and dikes to prevent runon, runoff, and to contain spills. • Nozzles used in vehicle and equipment fueling should be equipped with an automatic shutoff to control drips. Fueling operations should not be left unattended. • Use vapor recovery nozzles to help control drips as well as air pollution where required by Air Quality Management Districts (AQMD). • Federal, state, and local requirements should be observed for any stationary above ground storage tanks. Costs • All of the above measures are low cost except for the capital costs of above ground tanks that meet all local environmental, zoning, and fire codes. Inspection and Maintenance • Inspect BMPs in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events,daily during extended rain events, and after the conclusion of rain events. • Vehicles and equipment should be inspected each day of use for leaks. Leaks should be repaired immediately, or problem vehicles or equipment should be removed from the project site. • Keep ample supplies of spill cleanup materials onsite. December 2019 CASQA BMP Handbook 2 of 3 Construction www.casqa.org Vehicle and Equipment Fueling NS-9 • Immediately clean up spills and properly dispose of contaminated soil and cleanup materials. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Coastal Nonpoint Pollution Control Program: Program Development and Approval Guidance, Working Group Working Paper; USEPA,April 1992. Stormwater Quality Handbooks -Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans),November 2000. Stormwater Management for Construction Activities, Developing Pollution Prevention Plans and Best Management Practices, EPA 832-R-92oo5; USEPA,April 1992. December 2019 CASQA BMP Handbook 3 of 3 Construction www.casqa.org Vehicle & Equipment Maintenance NS- 10 Categories EC Erosion Control SE Sediment Control s' TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Q USED--- Management Control FREEZE USED /0 WM Waste Management and �� = Materials Pollution Control /— `� „ / • Legend: - �� ;.Doi 0 Primary Objective ® \Ill 0 Secondary Objective ----- Targeted Constituents Description and Purpose Sediment Prevent or reduce the contamination of stormwater resulting Nutrients 0 from vehicle and equipment maintenance by running a"dry Trash p and clean site". The best option would be to perform maintenance activities at an offsite facility. If this option is not Metals available then work should be performed in designated areas Bacteria only,while providing cover for materials stored outside, Oil and Grease 0 checking for leaks and spills, and containing and cleaning up Organics 0 spills immediately. Employees and subcontractors must be trained in proper procedures. Potential Alternatives Suitable Applications None These procedures are suitable on all construction projects where an onsite yard area is necessary for storage and maintenance of heavy equipment and vehicles. Limitations If User/Subscriber modifies this fact Onsite vehicle and equipment maintenance should only be used sheet in any way,the CASQA where it is impractical to send vehicles and equipment offsite name/logo and footer below must be for maintenance and repair. Sending vehicles/equipment removed from each page and not offsite should be done in conjunction with TC-1, Stabilized appear on the modified version. Construction Entrance/Exit. Outdoor vehicle or equipment maintenance is a potentially significant source of stormwater pollution. Activities that can contaminate stormwater include engine repair and service, changing or replacement of fluids, and outdoor equipment storage and parking(engine fluid leaks). For further information on vehicle or equipment servicing, see NS-8, CASQA C\I II ORN,A SLOB\,WAL FR December 2019 CASQA BMP Handbook 1 of 4 Construction www.casqa.org Vehicle & Equipment Maintenance NS- 10 Vehicle and Equipment Cleaning, and NS-9,Vehicle and Equipment Fueling. Implementation • Use offsite repair shops as much as possible. These businesses are better equipped to handle vehicle fluids and spills properly. Performing this work offsite can also be economical by eliminating the need for a separate maintenance area. • If maintenance must occur onsite, use designated areas,located away from drainage courses. Dedicated maintenance areas should be protected from stormwater runon and runoff and should be located at least 50 ft from downstream drainage facilities and watercourses. • Drip pans or absorbent pads should be used during vehicle and equipment maintenance work that involves fluids,unless the maintenance work is performed over an impermeable surface in a dedicated maintenance area. • Place a stockpile of spill cleanup materials where it will be readily accessible. • All fueling trucks and fueling areas are required to have spill kits and/or use other spill protection devices. • Use adsorbent materials on small spills. Remove the absorbent materials promptly and dispose of properly. • Inspect onsite vehicles and equipment daily at startup for leaks, and repair immediately. • Keep vehicles and equipment clean; do not allow excessive build-up of oil and grease. • Segregate and recycle wastes, such as greases,used oil or oil filters, antifreeze, cleaning solutions, automotive batteries,hydraulic and transmission fluids. Provide secondary containment and covers for these materials if stored onsite. • Train employees and subcontractors in proper maintenance and spill cleanup procedures. • Drip pans or plastic sheeting should be placed under all vehicles and equipment placed on docks,barges,or other structures over water bodies when the vehicle or equipment is planned to be idle for more than 1 hour. • For long-term projects, consider using portable tents or covers over maintenance areas if maintenance cannot be performed offsite. • Consider use of new, alternative greases and lubricants, such as adhesive greases, for chassis lubrication and fifth-wheel lubrication. • Properly dispose of used oils,fluids,lubricants, and spill cleanup materials. • Do not place used oil in a dumpster or pour into a storm drain or watercourse. • Properly dispose of or recycle used batteries. • Do not bury used tires. December 2019 CASQA BMP Handbook 2 of 4 Construction www.casqa.org Vehicle & Equipment Maintenance NS- 10 • Repair leaks of fluids and oil immediately. Listed below is further information if you must perform vehicle or equipment maintenance onsite. Safer Alternative Products • Consider products that are less toxic or hazardous than regular products. These products are often sold under an"environmentally friendly"label. • Consider use of grease substitutes for lubrication of truck fifth-wheels. Follow manufacturers label for details on specific uses. • Consider use of plastic friction plates on truck fifth-wheels in lieu of grease. Follow manufacturers label for details on specific uses. Waste Reduction Parts are often cleaned using solvents such as trichloroethylene,trichloroethane,or methylene chloride. Many of these cleaners are listed in California Toxic Rule as priority pollutants. These materials are harmful and must not contaminate stormwater. They must be disposed of as a hazardous waste. Reducing the number of solvents makes recycling easier and reduces hazardous waste management costs. Often, one solvent can perform a job as well as two different solvents. Also,if possible, eliminate or reduce the amount of hazardous materials and waste by substituting non-hazardous or less hazardous materials. For example, replace chlorinated organic solvents with non-chlorinated solvents. Non-chlorinated solvents like kerosene or mineral spirits are less toxic and less expensive to dispose of properly. Check the list of active ingredients to see whether it contains chlorinated solvents. The"chlor"term indicates that the solvent is chlorinated. Also,try substituting a wire brush for solvents to clean parts. Recycling and Disposal Separating wastes allows for easier recycling and may reduce disposal costs. Keep hazardous wastes separate, do not mix used oil solvents, and keep chlorinated solvents (like,- trichloroethane) separate from non-chlorinated solvents (like kerosene and mineral spirits). Promptly transfer used fluids to the proper waste or recycling drums. Don't leave full drip pans or other open containers lying around. Provide cover and secondary containment until these materials can be removed from the site. Oil filters can be recycled. Ask your oil supplier or recycler about recycling oil filters. Do not dispose of extra paints and coatings by dumping liquid onto the ground or throwing it into dumpsters. Allow coatings to dry or harden before disposal into covered dumpsters. Store cracked batteries in a non-leaking secondary container. Do this with all cracked batteries, even if you think all the acid has drained out. If you drop a battery,treat it as if it is cracked. Put it into the containment area until you are sure it is not leaking. Costs All of the above are low cost measures. Higher costs are incurred to setup and maintain onsite maintenance areas. December 2019 CASQA BMP Handbook 3 of 4 Construction www.casqa.org Vehicle & Equipment Maintenance NS- 10 Inspection and Maintenance • Inspect and verify that activity-based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way,inspect BMPs in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. • Inspect BMPs subject to non-stormwater discharges daily while non-stormwater discharges occur. • Keep ample supplies of spill cleanup materials onsite. • Maintain waste fluid containers in leak proof condition. • Vehicles and equipment should be inspected on each day of use. Leaks should be repaired immediately, or the problem vehicle(s) or equipment should be removed from the project site. • Inspect equipment for damaged hoses and leaky gaskets routinely. Repair or replace as needed. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Coastal Nonpoint Pollution Control Program; Program Development and Approval Guidance, Working Group,Working Paper; USEPA,April 1992. Stormwater Quality Handbooks -Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation(Caltrans),November 2000. December 2019 CASQA BMP Handbook 4 of 4 Construction www.casqa.org Concrete Curing NS- 12 Categories EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WM Waste Management and Materials Pollution Control Legend: 0 Primary Category 0 Secondary Category Targeted Constituents Description and Purpose Sediment Concrete curing is used in the construction of structures such as Nutrients bridges, retaining walls,pump houses,large slabs, and Trash structured foundations. Concrete curing includes the use of Metals 0 both chemical and water methods. Bacteria Concrete and its associated curing materials have basic Oil and Grease chemical properties that can raise the pH of water to levels Organics outside of the permitted range. Discharges of stormwater and non-stormwater exposed to concrete during curing may have a high pH and may contain chemicals, metals, and fines. The Potential Alternatives General Permit incorporates Numeric Action Levels (NAL) for None pH (see Section 2 of this handbook to determine your project's risk level and if you are subject to these requirements). Proper procedures and care should be taken when managing concrete curing materials to prevent them from coming into contact with stormwater flows,which could result in a high pH If User/Subscriber modifies this fact discharge. sheet in any way,the CASQA name/logo and footer below must be Suitable Applications removed from each page and not Suitable applications include all projects where Portland appear on the modified version. Cement Concrete(PCC) and concrete curing chemicals are placed where they can be exposed to rainfall, runoff from other areas, or where runoff from the PCC will leave the site. Limitations • Runoff contact with concrete waste can raise pH levels in the water to environmentally harmful levels and trigger permit violations. CASQA C ALIIOR N I;\S LORNI SA'I LIZ December 2019 CASQA BMP Handbook 1 of 3 Construction www.casqa.org Concrete Curing NS- 12 Implementation Chemical Curing ■ Avoid over spray of curing compounds. ■ Minimize the drift by applying the curing compound close to the concrete surface. Apply an amount of compound that covers the surface but does not allow any runoff of the compound. ■ Use proper storage and handling techniques for concrete curing compounds. Refer to WM- 1, Material Delivery and Storage. ■ Protect drain inlets prior to the application of curing compounds. ■ Refer to WM-4, Spill Prevention and Control. Water Curing for Bridge Decks,Retaining Walls, and other Structures ■ Direct cure water away from inlets and watercourses to collection areas for evaporation or other means of removal in accordance with all applicable permits. See WM-8 Concrete Waste Management. ■ Collect cure water at the top of slopes and transport to a concrete waste management area in a non-erosive manner. See EC-9 Earth Dikes and Drainage Swales, EC-io,Velocity Dissipation Devices, and EC-1i, Slope Drains. ■ Utilize wet blankets or a similar method that maintains moisture while minimizing the use and possible discharge of water. Education • Educate employees, subcontractors, and suppliers on proper concrete curing techniques to prevent contact with discharge as described herein. • Arrange for the QSP or the appropriately trained contractor's superintendent or representative to oversee and enforce concrete curing procedures. Costs All of the above measures are generally low cost. Inspection and Maintenance ■ Inspect and verify that activity-based BMPs are in place prior to the commencement of associated activities. ■ BMPs must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. ■ Inspect BMPs subject to non-stormwater discharges daily while non-stormwater discharges occur. ■ Sample non-stormwater discharges and stormwater runoff that contacts uncured and partially cured concrete as required by the General Permit. December 2019 CASQA BMP Handbook 2 of 3 Construction www.casqa.org Concrete Curing NS- 12 • Ensure that employees and subcontractors implement appropriate measures for storage, handling, and use of curing compounds. • Inspect cure containers and spraying equipment for leaks. References Blue Print for a Clean Bay-Construction-Related Industries: Best Management Practices for Stormwater Pollution Prevention; Santa Clara Valley Non-Point Source Pollution Control Program, 1992. Stormwater Quality Handbooks -Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation(Caltrans), March 2003. Stormwater Management for Construction Activities, Developing Pollution Prevention Plans and Best Management Practices, EPA 832-R-92oo5; USEPA,April 1992. Erosion and Sediment Control Manual, Oregon Department of Environmental Quality, February 2005. December 2019 CASQA BMP Handbook 3 of 3 Construction www.casqa.org Concrete Finishing NS- 13 Categories EC Erosion Control SE Sediment Control k., TC Tracking Control Alt WE Wind Erosion Control NS Non-Stormwater Q ( F �y Management Control i WM Waste Management and Q Materials Pollution Control Legend: 0 Primary Category ( % 0 Secondary Category Targeted Constituents Description and Purpose Sediment 0 Concrete finishing methods are used for bridge deck Nutrients rehabilitation, paint removal, curing compound removal, and Trash final surface finish appearances. Methods include sand Metals 0 blasting, shot blasting, grinding, or high-pressure water blasting. Stormwater and non-stormwater exposed to concrete Bacteria finishing by-products may have a high pH and may contain Oil and Grease chemicals, metals, and fines. Proper procedures and Organics 0 implementation of appropriate BMPs can minimize the impact that concrete-finishing methods may have on stormwater and Potential Alternatives non-stormwater discharges. None The General Permit incorporates Numeric Action Levels (NAL) for pH (see Section 2 of this handbook to determine your project's risk level and if you are subject to these requirements). Concrete and its associated curing materials have basic chemical properties that can raise pH levels outside of the If User/Subscriber modifies this fact permitted range. Additional care should be taken when sheet in any way,the CASQA managing these materials to prevent them from coming into name/logo and footer below must be contact with stormwater flows,which could lead to exceedances removed from each page and not appear on the modified version. of the General Permit requirements. Suitable Applications These procedures apply to all construction locations where concrete finishing operations are performed. CASQA (AI.II'OKN I A S I'O SM O AF IS December 2019 CASQA BMP Handbook 1 of 3 Construction www.casqa.org Concrete Finishing NS- 13 Limitations ■ Runoff contact with concrete waste can raise pH levels in the water to environmentally harmful levels and trigger permit violations. Implementation ■ Collect and properly dispose of water from high-pressure water blasting operations. ■ Collect contaminated water from blasting operations at the top of slopes. Transport or dispose of contaminated water while using BMPs such as those for erosion control. Refer to EC-9, Earth Dikes and Drainage Swales, EC-io,Velocity Dissipation Devices, and EC-ii, Slope Drains. ■ Direct water from blasting operations away from inlets and watercourses to collection areas for infiltration or other means of removal (dewatering). Refer to NS-2 Dewatering Operations. ■ Protect inlets during sandblasting operations. Refer to SE-lo, Storm Drain Inlet Protection. ■ Refer to WM-8, Concrete Waste Management for disposal of concrete debris. ■ Minimize the drift of dust and blast material as much as possible by keeping the blasting nozzle close to the surface. ■ When blast residue contains a potentially hazardous waste, refer to WM-6, Hazardous Waste Management. Education ■ Educate employees, subcontractors, and suppliers on proper concrete finishing techniques to prevent contact with discharge as described herein. ■ Arrange for the QSP or the appropriately trained contractor's superintendent or representative to oversee and enforce concrete finishing procedures. Costs These measures are generally of low cost. Inspection and Maintenance ■ Inspect and verify that activity-based BMPs are in place prior to the commencement of associated activities. ■ BMPs must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. ■ Inspect BMPs subject to non-stormwater discharges daily while non-stormwater discharges occur. ■ Sample non-stormwater discharges and stormwater runoff that contacts concrete dust and debris as required by the General Permit. December 2019 CASQA BMP Handbook 2 of 3 Construction www.casqa.org Concrete Finishing NS- 13 • Sweep or vacuum up debris from sandblasting at the end of each shift. • At the end of each work shift, remove and contain liquid and solid waste from containment structures, if any, and from the general work area. • Inspect containment structures for damage prior to use and prior to onset of forecasted rain. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Stormwater Quality Handbooks -Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation(Caltrans), March 2003. Stormwater Management for Construction Activities, Developing Pollution Prevention Plans and Best Management Practices, EPA 832-R-92oo5; USEPA,April 1992. December 2019 CASQA BMP Handbook 3 of 3 Construction www.casqa.org Silt Fence SE- 1 Categories -7 EC Erosion Control SE Sediment Control Q 7----- TC Tracking Control WE Wind Erosion Control iiii....._ NS Non-Stormwater Management Control W Waste Management and M Materials Pollution Control Legend: 0 Primary Category x❑ Secondary Category Description and Purpose Targeted Constituents A silt fence is made of a woven geotextile that has been entrenched, attached to supporting poles, and sometimes Sediment(coarse sediment) 0 backed by a plastic or wire mesh for support. The silt fence Nutrients detains water,promoting sedimentation of coarse sediment Trash behind the fence. Silt fence does not retain soil fine particles Metals like clays or silts. Bacteria Oil and Grease Suitable Applications Organics Silt fences are suitable for perimeter control,placed below areas where sheet flows discharge from the site. They could also be used as interior controls below disturbed areas where Potential Alternatives runoff may occur in the form of sheet and rill erosion and SE-5 Fiber Rolls around inlets within disturbed areas (Storm Drain Inlet Protection, SE-10). Silt fences should not be used in locations SE-6 Gravel Bag Berm SE-12 Manufactured Linear Sediment where the flow is concentrated. Silt fences should always be Controls used in combination with erosion controls. Suitable applications include: SE-13 Compost Socks and Berms SE-14 Biofilter Bags • At perimeter of a project(although they should not be installed up and down slopes). If User/Subscriber modifies this fact sheet in any way,the CASQA • Below the toe or down slope of exposed and erodible name/logo and footer below must slopes. be removed from each page and not appear on the modified version. • Along streams and channels. • Around temporary spoil areas and stockpiles. December 2019 CASQA BMP Handbook 1 of 10 Construction www.casqa.org Silt Fence SE- 1 ■ Around inlets. ■ Below other small cleared areas. Limitations CASQA ■ Do not use in streams, channels, drain inlets, or anywhere flow is CALIFORNIA SIORM WAl FR concentrated. ■ Do not use in locations where ponded water may cause a flooding hazard. ■ Do not use silt fence to divert water flows or place across any contour line. ■ Improperly installed fences are subject to failure from undercutting, overtopping, or collapsing. ■ Must be trenched and keyed in. ■ According to the State Water Board's CGP Review,Issue #2 (2014), silt fences reinforced with metal or plastic mesh should be avoided due to plastic pollution and wildlife concerns. ■ Not intended for use as a substitute for Fiber Rolls (SE-5),when fiber rolls are being used as a slope interruption device. ■ Do not use on slopes subject to creeping, slumping, or landslides. Implementation General A silt fence is a temporary sediment barrier consisting of woven geotextile stretched across and attached to supporting posts, trenched-in, and, depending upon the strength of fabric used, supported with plastic or wire mesh fence. Silt fences trap coarse sediment by intercepting and detaining sediment-laden runoff from disturbed areas in order to promote sedimentation behind the fence. The following layout and installation guidance can improve performance and should be followed: ■ Silt fence should be used in combination with erosion controls up-slope in order to provide the most effective sediment control. ■ Silt fence alone is not effective at reducing turbidity. (Barrett and Malina, 2004) ■ Designers should consider diverting sediment laden water to a temporary sediment basin or trap. (EPA, 2012) ■ Use principally in areas where sheet flow occurs. ■ Install along a level contour, so water does not pond more than 1.5 ft. at any point along the silt fence. December 2019 CASQA BMP Handbook 2 of 10 Construction www.casqa.org Silt Fence SE- 1 ■ Provide sufficient room for runoff to pond behind the fence and to allow sediment removal equipment to pass between the silt fence and toes of slopes or other obstructions. About 1200 ft.2 of ponding area should be provided for every acre draining to the fence. ■ Efficiency of silt fences is primarily dependent on the detention time of the runoff behind the control. (Barrett and Malina, 2004) ■ The drainage area above any fence should not exceed a quarter of an acre. (Rule of Thumb- 1oo-feet of silt fence per 1O,000 ft.2 of disturbed area.) (EPA, 2012) ■ The maximum length of slope draining to any point along the silt fence should be 1Oo ft. per ft of silt fence. ■ Turn the ends of the filter fence uphill to prevent stormwater from flowing around the fence. ■ Leave an undisturbed or stabilized area immediately down slope from the fence where feasible. ■ Silt fences should remain in place until the disturbed area draining to the silt fence is permanently stabilized, after which,the silt fence fabric and posts should be removed and properly disposed. ■ J-hooks,which have ends turning up the slope to break up long runs of fence and provide multiple storage areas that work like mini-retention areas, may be used to increase the effectiveness of silt fence. ■ Be aware of local regulations regarding the type and installation requirements of silt fence, which may differ from those presented in this fact sheet. Design and Layout In areas where high winds are anticipated the fence should be supported by a plastic or wire mesh. The geotextile fabric of the silt fence should contain ultraviolet inhibitors and stabilizers to provide longevity equivalent to the project life or replacement schedule. ■ Layout in accordance with the attached figures. ■ For slopes that contain a high number of rocks or large dirt clods that tend to dislodge,it maybe necessary to protect silt fence from rocks (e.g., rockfall netting) ensure the integrity of the silt fence installation. December 2019 CASQA BMP Handbook 3 of 10 Construction www.casqa.org Silt Fence SE- 1 Standard vs.Heavy Duty Silt Fence Standard Silt Fence • Generally applicable in cases where the area draining to fence produces moderate sediment loads. Heavy Duty Silt Fence • Heavy duty silt fence usually has 1 or more of the following characteristics,not possessed by standard silt fence. o Fabric is reinforced with wire backing or additional support. o Posts are spaced closer than pre-manufactured, standard silt fence products. • Use is generally limited to areas affected by high winds. • Area draining to fence produces moderate sediment loads. Materials Standard Silt Fence • Silt fence material should be woven geotextile with a minimum width of 36 in. The fabric should conform to the requirements in ASTM designation D6461. • Wooden stakes should be commercial quality lumber of the size and shape shown on the plans. Each stake should be free from decay,splits or cracks longer than the thickness of the stake or other defects that would weaken the stakes and cause the stakes to be structurally unsuitable. • Staples used to fasten the fence fabric to the stakes should be not less than 1.75 in. long and should be fabricated from 15-gauge or heavier wire. The wire used to fasten the tops of the stakes together when joining two sections of fence should be 9 gauge or heavier wire. Galvanizing of the fastening wire will not be required. Heavy-Duty Silt Fence • Some silt fence has a wire backing to provide additional support, and there are products that may use prefabricated plastic holders for the silt fence and use metal posts instead of wood stakes. Installation Guidelines— Traditional Method Silt fences are to be constructed on a level contour. Sufficient area should exist behind the fence for ponding to occur without flooding or overtopping the fence. • A trench should be excavated approximately 6 in.wide and 6 in. deep along the line of the proposed silt fence(trenches should not be excavated wider or deeper than necessary for proper silt fence installation). • Bottom of the silt fence should be keyed-in a minimum of 12 in. • Posts should be spaced a maximum of 6 ft. apart and driven securely into the ground a minimum of 18 in. or 12 in.below the bottom of the trench. • When standard strength geotextile is used, a plastic or wire mesh support fence should be fastened securely to the upslope side of posts using heavy—duty wire staples at least 1 in. long. The mesh should extend into the trench. December 2019 CASQA BMP Handbook 4 of 10 Construction www.casqa.org Silt Fence SE- 1 ■ When extra-strength geotextile and closer post spacing are used, the mesh support fence maybe eliminated. ■ Woven geotextile should be purchased in a long roll,then cut to the length of the barrier. When joints are necessary, geotextile should be spliced together only at a support post,with a minimum 6 in. overlap and both ends securely fastened to the post. ■ The trench should be backfilled with native material and compacted. ■ Construct the length of each reach so that the change in base elevation along the reach does not exceed 1/3 the height of the barrier; in no case should the reach exceed 5Oo ft. ■ Cross barriers should be a minimum of 1/3 and a maximum of 1/2 the height of the linear barrier. ■ See typical installation details at the end of this fact sheet. December 2019 CASQA BMP Handbook 5 of 10 Construction www.casqa.org Silt Fence SE- 1 Installation Guidelines -Static Slicing Method ■ Static Slicing is defined as insertion of a narrow blade pulled behind a tractor, similar to a plow blade, at least io in. into the soil while at the same time pulling silt geotextile fabric into the ground through the opening created by the blade to the depth of the blade. Once the geotextile is installed,the soil is compacted using tractor tires. ■ This method will not work with pre-fabricated,wire backed silt fence. ■ Benefits: o Ease of installation(most often done with a 2-person crew). o Minimal soil disturbance. o Better level of compaction along fence,less susceptible to undercutting o Uniform installation. ■ Limitations: o Does not work in shallow or rocky soils. o Complete removal of geotextile material after use is difficult. o Be cautious when digging near potential underground utilities. Costs ■ It should be noted that costs vary greatly across regions due to available supplies and labor costs. ■ Average annual cost for installation using the traditional silt fence installation method (assumes 6 month useful life) is $7 per linear foot based on vendor research. Range of cost is $3.50 - $9.10 per linear foot. Inspection and Maintenance ■ BMPs must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. ■ Repair undercut silt fences. ■ Repair or replace split,torn, slumping, or weathered fabric. The lifespan of silt fence fabric is generally 5 to 8 months. ■ Silt fences that are damaged and become unsuitable for the intended purpose should be removed from the site of work, disposed, and replaced with new silt fence barriers. ■ Sediment that accumulates in the BMP should be periodically removed in order to maintain BMP effectiveness. Sediment should be removed when the sediment accumulation reaches 1/3 of the barrier height. ■ Silt fences should be left in place until the upgradient area is permanently stabilized. Until then,the silt fence should be inspected and maintained regularly. December 2019 CASQA BMP Handbook 6 of 10 Construction www.casqa.org Silt Fence SE-1 • Remove silt fence when upgradient areas are stabilized. Fill and compact post holes and anchor trench,remove sediment accumulation,grade fence alignment to blend with adjacent ground, and stabilize disturbed area. References CGP Review#2, State Water Resources Control Board, 2014. Available online at: http://www.waterboards.ca.gov/water_issues/programs/stormwater/docs/training/cgp_revie w_issue2.pdf. Manual of Standards of Erosion and Sediment Control Measures,Association of Bay Area Governments, May 1995. Monitoring Data on Effectiveness of Sediment Control Techniques, Proceedings of World Water and Environmental Resources Congress, Barrett M. and Malina J. 2004. National Management Measures to Control Nonpoint Source Pollution from Urban Areas, United States Environmental Protection Agency, 2002. Proposed Guidance Specifying Management Measures for Sources of Nonpoint Pollution in Coastal Waters,Work Group-Working Paper,USEPA,April 1992. Sedimentation and Erosion Control Practices, and Inventory of Current Practices (Draft), USEPA, 1990. Southeastern Wisconsin Regional Planning Commission(SWRPC). Costs of Urban Nonpoint Source Water Pollution Control Measures. Technical Report No. 31. Southeastern Wisconsin Regional Planning Commission,Waukesha,WI. 1991. Stormwater Quality Handbooks-Construction Site Best Management Practices (BMPs)Manual, State of California Department of Transportation(Caltrans), March 2003. Stormwater Management Manual for The Puget Sound Basin,Washington State Department of Ecology, Public Review Draft, 1991. U.S. Environmental Protection Agency(USEPA). Stormwater Best Management Practices: Silt Fences. U.S. Environmental Protection Agency, Office of Water,Washington, DC, 2012. U.S. Environmental Protection Agency(USEPA). Stormwater Management for Industrial Activities: Developing Pollution Prevention Plans and Best Management Practices. U.S. Environmental Protection Agency, Office of Water,Washington, DC, 1992. Water Quality Management Plan for the Lake Tahoe Region,Volume II, Handbook of Management Practices,Tahoe Regional Planning Agency,November 1988. Soil Stabilization BMP Research for Erosion and Sediment Controls: Cost Survey Technical Memorandum, State of California Department of Transportation(Caltrans),July 2007. Erosion and Sediment Control Manual, Oregon Department of Environmental Quality, February 2005. December 2019 CASQA BMP Handbook 7 of 10 Construction www.casqa.org Silt Fence SE- 1 LEGEND Max reach = 500' See note 1 Tamped backfill ► Slope direction Optional maintenance ^^^'� Direction of flow Cross barrier opening detail (See note 10) ' �1Ap Fabric Wood Irstake Fabric • w :� Cross barrier w Toe of slope IIVJJ PLAN °' SILT FENCE rn End detail See Nate 14 NOTES Silt fence 1. Construct the length of each reach so that the change in base elevation along the reach does not exceed 1/3 the height of the linear barrier. in no case shall the reach length exceed 500', 2. The last 8'-0" of fence shall be turned up slope. 3. Stake dimensions are nominal. Toe of slope 4. Dimension may vary to fit field condition. 5. Stakes shall be spaced at 8'-0" maximum and shall be positioned on downstream side of fence. rn 6. Stakes to overlap and fence fabric to fold around each stake CROSS BARRIER DETAIL one full turn. Secure fabric to stake with 4 staples. 7. Stakes shall be driven tightly together to prevent potential flow—through of sediment at joint. The tops of the stakes shall be secured with wire. Sandbags 8. For end stake, fence fabric shall be folded around two stakes one full turn and secured with 4 staples. 9. Minimum 4 staples per stake. Dimensions shown are typical. 10. Cross barriers shall be a minimum of 1/3 and a maximum of 1/2 the See note 10 height of the linear barrier. 11. Maintenance openings shall be constructed in a manner to ensure sediment remains behind silt fence. 12. Joining sections shall not be placed at sump locations. SECTION C—C 13. Sandbag rows and layers shall be offset to eliminate gaps. 14. Add 3-4 bags to cross barrier on downgrodient side of silt fence as needed to prevent bypass or undermining and as allowable based on site limits of disturbance. December 2019 CASQA BMP Handbook 8 of 10 Construction www.casqa.org Silt Fence SE- 1 Setback varies (See note 4) Fabric section B Stake B (See notes 6, 7 & 12) LEGEND Tamped backfill Fabric 2" X 2" Wood stake Stake A (See notes 3 & 5) Slope direction Direction of flow Toe of slope Fabric section A Slope (See notes 6, 7 & 12) 6" See detail A JOINING SECTION DETAIL (TOP VIEW) 0 M `° IL ri/2" Ip2" x 2" wood stake 1/16" (See note 3) diameter Fabric (See note 8) 6" SECTION A—A END STAKE DETAIL (TOP VIEW) STAPLE DETAIL (SEE NOTE 9) 2" x 2" Silt fence wood stake fabric End stake (See note 2) Fabric Stake Stake Fabric Silt fence Yr tik 45° Ok r �7 End stake 6 Toe of slope DETAIL A End stake o Sandbags (2—layers high) Co END DETAIL OPTIONAL MAINTENANCE OPENING DETAIL (SEE NOTE 11) December 2019 CASQA BMP Handbook 9 of 10 Construction www.casqa.org Silt Fence SE- 1 SWPPP preparer to specify length of J—hook based on anticipated sediment load Ostl Sree Sheet Continuous Fence Fabric u u u u u u u u 200' Max. Place post adjacent and bind at top with wire Plan J—HOOK December 2019 CASQA BMP Handbook 10 of 10 Construction www.casqa.org Fiber Rolls SE-5 Categories EC Erosion Control ❑x SE Sediment Control Q TC Tracking Control WE Wind Erosion Control .:-,..:.O Non-Stormwater NS Management Control WM Waste Management and / Materials Pollution Control / Legend: / 0 Primary Category / 0 Secondary Category 1 Description and Purpose Targeted Constituents A fiber roll (also known as wattles or logs) consists of straw, Sediment 0 coir, curled wood fiber, or other biodegradable materials bound Nutrients into a tight tubular roll wrapped by plastic netting,which can Trash be photodegradable, or natural fiber, such as jute, cotton, or Metals sisal. Additionally, gravel core fiber rolls are available,which contain an imbedded ballast material such as gravel or sand for additional weight when staking the rolls are not feasible (such Bacteria as use as inlet protection). When fiber rolls are placed at the Oil and Grease toe and on the face of slopes along the contours,they intercept Organics runoff, reduce its flow velocity, release the runoff as sheet flow, and provide removal of sediment from the runoff(through sedimentation). By interrupting the length of a slope,fiber rolls Potential Alternatives can also reduce sheet and rill erosion until vegetation is SE-1 Silt Fence established. SE-6 Gravel Bag Berm Suitable Applications SE-8 Sandbag Barrier Fiber rolls may be suitable: SE-12 Manufactured Linear Sediment Controls • Along the toe,top, face, and at grade breaks of exposed and erodible slopes to shorten slope length and spread runoff as SE 14 Biofilter Bags sheet flow. If User/Subscriber modifies this fact • At the end of a downward slope where it transitions to a sheet in any way,the CASQA steeper slope. name/logo and footer below must be removed from each page and not • Along the perimeter of a project. appear on the modified version. • As check dams in unlined ditches with minimal grade. • Down-slope of exposed soil areas. CASQA December 2019 CASQA BMP Handbook c.aiuoiiaASIOR iIV>na Construction www.casqa.org Fiber Rolls SE-5 ■ At operational storm drains as a form of inlet protection. ■ Around temporary stockpiles. Limitations ■ Fiber rolls should be used in conjunction with erosion control, such as hydroseed, RECPs, etc. ■ Only biodegradable fiber rolls containing no plastic can remain on a site applying for a Notice of Termination due to plastic pollution and wildlife concerns (State Water Board, 2016). Fiber rolls containing plastic that are used on a site must be disposed of for final stabilization. ■ Fiber rolls are not effective unless trenched in and staked. If not properly staked and trenched in, fiber rolls will not work as intended and could be transported by high flows. ■ Not intended for use in high flow situations (i.e.,for concentrated flows). ■ Difficult to move once saturated. ■ Fiber rolls have a limited sediment capture zone. ■ Fiber rolls should not be used on slopes subject to creep, slumping, or landslide. ■ Rolls typically function for 12-24 months, depending upon local conditions and roll material. Implementation Fiber Roll Materials ■ Fiber rolls should be prefabricated. ■ Fiber rolls may come manufactured containing polyacrylamide (PAM), a flocculating agent within the roll. Fiber rolls impregnated with PAM provide additional sediment removal capabilities and should be used in areas with fine, clayey or silty soils to provide additional sediment removal capabilities. Monitoring may be required for these installations. ■ Fiber rolls are made from weed-free rice straw, flax, curled wood fiber, or coir bound into a tight tubular roll by netting or natural fiber(see Limitations above regarding plastic netting). ■ Typical fiber rolls vary in diameter from 6 in. to 20 in. Larger diameter rolls are available as well. The larger the roll,the higher the sediment retention capacity. ■ Typical fiber rolls lengths are 4, 10, 20 and 25 ft., although other lengths are likely available. Installation ■ Locate fiber rolls on level contours spaced as follows: - Slope inclination of 4:1 (H:V) or flatter: Fiber rolls should be placed at a maximum interval of 20 ft. December 2019 CASQA BMP Handbook 2 of 5 Construction www.casqa.org Fiber Rolls SE-5 - Slope inclination between 4:1 and 2:1 (H:V): Fiber Rolls should be placed at a maximum interval of 15 ft. (a closer spacing is more effective). - Slope inclination 2:1 (H:V) or greater: Fiber Rolls should be placed at a maximum interval of io ft. (a closer spacing is more effective). • Prepare the slope before beginning installation. • Dig small trenches across the slope on the contour. The trench depth should be 1/4 to 1/3 of the thickness of the roll,and the width should equal the roll diameter,in order to provide area to backfill the trench. • It is critical that rolls are installed perpendicular to water movement, and parallel to the slope contour. • Start building trenches and installing rolls from the bottom of the slope and work up. • It is recommended that pilot holes be driven through the fiber roll. Use a straight bar to drive holes through the roll and into the soil for the wooden stakes. • Turn the ends of the fiber roll up slope to prevent runoff from going around the roll. • Stake fiber rolls into the trench. - Drive stakes at the end of each fiber roll and spaced 4 ft maximum on center. - Use wood stakes with a nominal classification of o.75 by o.75 in. and minimum length of 24 in. • If more than one fiber roll is placed in a row,the rolls should be overlapped, not abutted. • See typical fiber roll installation details at the end of this fact sheet. Removal • Fiber rolls can be left in place or removed depending on the type of fiber roll and application (temporary vs.permanent installation). Fiber rolls encased with plastic netting or containing any plastic material will need to be removed from the site for final stabilization. Fiber rolls used in a permanent application are to be encased with a non-plastic material and are left in place. Removal of a fiber roll used in a permanent application can result in greater disturbance;therefore, during the BMP planning phase,the areas where fiber rolls will be used on final slopes, only fiber rolls wrapped in non-plastic material should be selected. • Temporary installations should only be removed when up gradient areas are stabilized per General Permit requirements, and/or pollutant sources no longer present a hazard. But they should also be removed before vegetation becomes too mature so that the removal process does not disturb more soil and vegetation than is necessary. December 2019 CASQA BMP Handbook 3 of 5 Construction www.casqa.org Fiber Rolls SE-5 Costs Material costs for straw fiber rolls range from $26 - $38 per 25-ft. roll'and curled wood fiber rolls range from $30 - $4o per ro112. Material costs for PAM impregnated fiber rolls range between $9.00-$12.00 per linear foot, based upon vendor research' . Inspection and Maintenance • BMPs must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. • Repair or replace split,torn,unraveling, or slumping fiber rolls. • If the fiber roll is used as a sediment capture device, or as an erosion control device to maintain sheet flows,sediment that accumulates in the BMP should be periodically removed in order to maintain BMP effectiveness. Sediment should be removed when sediment accumulation reaches one-third the designated sediment storage depth. • If fiber rolls are used for erosion control, such as in a check dam, sediment removal should not be required as long as the system continues to control the grade. Sediment control BMPs will likely be required in conjunction with this type of application. • Repair any rills or gullies promptly. References General Construction—Frequently Asked Questions, Storm Water Program website, State Water Resources Control Board, 2009 updated in 2o16. Available online at: http://www.waterboards.ca.gov/water issues/programs/stormwater/gen const faq.shtml. Stormwater Quality Handbooks-Construction Site Best Management Practices (BMPs)Manual, State of California Department of Transportation (Caltrans), March 2003. Erosion and Sediment Control Manual, Oregon Department of Environmental Quality, February 2005. 'Adjusted for inflation(2016 dollars)by Tetra Tech,Inc. 2 Costs estimated based on vendor query by Tetra Tech,Inc.2016. December 2019 CASQA BMP Handbook 4 of 5 Construction www.casqa.org Fiber Rolls SE-5 -V coo-' _v fk ' „ � ,,,- ,,,,,,„Kati „, y D i'i'i'i'i',il�' Note: ��-r':/',�,�,/,,', Install fiber roll y I along a level contour. �,,?,�i'i',11 rI',�,' III y --U \\� \(( \',//,�,�'i�,�,'' III' �/ -V JI \VAAA�� ,,,, III vv'V\'- 1.0.\ Fiber rolls to* o -�> \\\\ /''\iI f y 'irim ','i� \ 64- y ,,,'i,i,'i ',•, ///:�,�/,�,1 Sri, ,i 111 Vertical spacing \\\\\\ ', ,,,, ' 1 measured along the \\\�\\'\�'�'- II''/' '%% '- Ili J/ ill ,V face of the slope 'yv`'yXy\ A varies between $..-\����\� -� Install a fiber roll near 10' and 20' �`\�\\\\011\\0\\. \��\\\�\\\\o II\ % slope where it transitions \\\\\...\I, �., into a steeper slope TYPICAL FIBER ROLL INSTALLATION N.T.S. Fiber roll Slope 8 min vories w V1///l/ , E E Ili \kk\%<,p%o\\-\ D�\\�. GGp1 \\�Gi / / E \\\��\ ' 3 4" x 3 4„ wood stakes max 4' spacing ENTRENCHMENT DETAIL N.T.S. December 2019 CASQA BMP Handbook 5 of 5 Construction www.casqa.org Gravel Bag Berm SE-6 Categories EC Erosion Control ❑x SE Sediment Control TC Tracking Control 40010 WE Wind Erosion Control NS Non-Stormwater ', Management Control 401.1° WM WMariManagementam Mateerials Pollution Control �, 0° / Legend: �' El Primary Category 190 Secondary Category 1 f Description and Purpose Targeted Constituents A gravel bag berm is a series of gravel-filled bags placed on a Sediment level contour to intercept sheet flows. Gravel bags pond sheet Nutrients flow runoff, allowing sediment to settle out, and release runoff Trash slowly as sheet flow, preventing erosion. Metals Suitable Applications Bacteria Gravel bag berms may be suitable: Oil and Grease Organics • As a linear sediment control measure: - Below the toe of slopes and erodible slopes Potential Alternatives SE-1 Silt Fence - As sediment traps at culvert/pipe outlets SE-5 Fiber Roll - Below other small cleared areas SE-8 Sandbag Barrier - Along the perimeter of a site SE-12 Temporary Silt Dike SE-14 Biofilter Bags - Down slope of exposed soil areas If User/Subscriber modifies this fact - Around temporary stockpiles and spoil areas sheet in any way,the CASQA name/logo and footer below must be - Parallel to a roadway to keep sediment off paved areas removed from each page and not appear on the modified version. - Along streams and channels • As a linear erosion control measure: - Along the face and at grade breaks of exposed and erodible slopes to shorten slope length and spread runoff as sheet flow. CASQA (A1.II OR IA S1()I!M!S_Al I December 2019 CASQA BMP Handbook 1 of 4 Construction www.casqa.org Gravel Bag Berm SE-6 - At the top of slopes to divert runoff away from disturbed slopes. - As chevrons (small check dams) across mildly sloped construction roads. For use check dam use in channels, see SE-4, Check Dams. Limitations • Gravel berms may be difficult to remove. • Removal problems limit their usefulness in landscaped areas. • Gravel bag berm may not be appropriate for drainage areas greater than 5 acres. • Runoff will pond upstream of the berm, possibly causing flooding if sufficient space does not exist. • Degraded gravel bags may rupture when removed, spilling contents. • Installation can be labor intensive. • Durability of gravel bags is somewhat limited, and bags may need to be replaced when installation is required for longer than 6 months. • Easily damaged by construction equipment. • When used to detain concentrated flows, maintenance requirements increase. Implementation General A gravel bag berm consists of a row of open graded gravel-filled bags placed on a level contour. When appropriately placed, a gravel bag berm intercepts and slows sheet flow runoff, causing temporary ponding. The temporary ponding allows sediment to settle. The open graded gravel in the bags is porous,which allows the ponded runoff to flow slowly through the bags, releasing the runoff as sheet flows. Gravel bag berms also interrupt the slope length and thereby reduce erosion by reducing the tendency of sheet flows to concentrate into rivulets,which erode rills, and ultimately gullies, into disturbed, sloped soils. Gravel bag berms are similar to sand bag barriers but are more porous. Generally, gravel bag berms should be used in conjunction with temporary soil stabilization controls up slope to provide effective erosion and sediment control. Design and Layout • Locate gravel bag berms on level contours. • When used for slope interruption,the following slope/sheet flow length combinations apply: - Slope inclination of 4:1 (H:V) or flatter: Gravel bags should be placed at a maximum interval of 20 ft,with the first row near the slope toe. - Slope inclination between 4:1 and 2:1 (H:V): Gravel bags should be placed at a maximum interval of 15 ft. (a closer spacing is more effective),with the first row near the slope toe. December 2019 CASQA BMP Handbook 2 of 4 Construction www.casqa.org Gravel Bag Berm SE-6 Slope inclination 2:1 (H:V) or greater: Gravel bags should be placed at a maximum interval of 10 ft. (a closer spacing is more effective),with the first row near the slope toe. ■ Turn the ends of the gravel bag barriers up slope to prevent runoff from going around the berm. ■ Allow sufficient space up slope from the gravel bag berm to allow ponding, and to provide room for sediment storage. ■ For installation near the toe of the slope, gravel bag barriers should be set back from the slope toe to facilitate cleaning. Where specific site conditions do not allow for a set-back,the gravel bag barrier may be constructed on the toe of the slope. To prevent flows behind the barrier,bags can be placed perpendicular to a berm to serve as cross barriers. ■ Drainage area should not exceed 5 acres. ■ In Non-Traffic Areas: - Height = 18 in. maximum - Top width = 24 in. minimum for three or more-layer construction - Top width = 12 in. minimum for one-or two-layer construction - Side slopes = 2:1 (H:V) or flatter ■ In Construction Traffic Areas: - Height = 12 in. maximum - Top width = 24 in. minimum for three or more-layer construction. - Top width = 12 in. minimum for one-or two-layer construction. - Side slopes = 2:1 (H:V) or flatter. ■ Butt ends of bags tightly. ■ On multiple row, or multiple layer construction, overlap butt joints of adjacent row and row beneath. ■ Use a pyramid approach when stacking bags. Materials ■ Bag Material: Bags should be woven polypropylene,polyethylene or polyamide fabric or burlap, minimum unit weight of 4 ounces/yd2, Mullen burst strength exceeding 300 lb/in2 in conformance with the requirements in ASTM designation D3786, and ultraviolet stability exceeding 70%in conformance with the requirements in ASTM designation D4355. December 2019 CASQA BMP Handbook 3 of 4 Construction www.casqa.org Gravel Bag Berm SE-6 • Bag Size: Each gravel-filled bag should have a length of 18 in.,width of 12 in.,thickness of 3 in., and mass of approximately 33 lbs. Bag dimensions are nominal and may vary based on locally available materials. • Fill Material: Fill material should be 0.5 to 1 in. Crushed rock, clean and free from clay, organic matter, and other deleterious material, or other suitable open graded, non-cohesive, porous gravel. Costs Material costs for gravel bags are average and are dependent upon material availability. $3.20- $3.80 per filled gravel bag is standard based upon vendor research (Adjusted for inflation, 2016 dollars,by Tetra Tech, Inc.). Inspection and Maintenance • BMPs must be inspected in accordance with General Permit requirements for the associated project type and risk level. It is recommended that at a minimum, BMPs be inspected weekly,prior to forecasted rain events, daily during extended rain events, and after the conclusion of rain events. • Gravel bags exposed to sunlight will need to be replaced every two to three months due to degrading of the bags. • Reshape or replace gravel bags as needed. • Repair washouts or other damage as needed. • Sediment that accumulates in the BMP should be periodically removed in order to maintain BMP effectiveness. Sediment should be removed when the sediment accumulation reaches one-third of the barrier height. • Remove gravel bag berms when no longer needed and recycle gravel fill whenever possible and properly dispose of bag material. Remove sediment accumulation and clean, re-grade, and stabilize the area. References Handbook of Steel Drainage and Highway Construction,American Iron and Steel Institute, 1983. Stormwater Quality Handbooks -Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), March 2003. Stormwater Pollution Plan Handbook, First Edition, State of California, Department of Transportation Division of New Technology, Materials and Research, October 1992. Erosion and Sediment Control Manual, Oregon Department of Environmental Quality, February 2005. December 2019 CASQA BMP Handbook 4 of 4 Construction www.casqa.org Appendix F: BMP Inspection Form 2026 Pioneer Trail Waterline Project 58 February 13, 2026 DAILY BMP INSPECTION REPORT Date and Time of Inspection: Date Report Written: Part I. General Information Site Information Construction Site Name: Construction stage: Approximate area of site that is exposed: Photos Taken: (Circle one) Yes No Weather- Attach NOAA Forecast Estimate time since last storm: Rain gauge reading and location: (days or hours) (in) Is a "Qualifying Event" predicted or did one occur(i.e., 0.1" rain with 48-hrs or greater between events)? (Y/N) If yes, summarize forecast: Exemption Documentation (explanation required if inspection could not be conducted). Visual inspections are not required outside of business hours or during dangerous weather conditions such as flooding or electrical storms. Inspector Information Inspector Name: Inspector Title: Signature: Date: 2026 Pioneer Trail Waterline Project 59 February 13, 2026 Part II. BMP Observations. Describe deficiencies in Part III. Failures or other Action Action Minimum Site BMPs short comings Required Implemented (yes, no, N/A) (yes/no) (Date) Material Storage(chemicals in watertight containers), Construction Materials are`palletized' (stored on pallets) Hazardous/Non-Hazardous Spill Response(procedures and cleanup material are available onsite) Inactive Stockpiles(covered and bermed for wind/rain) Construction Entrance(required at all points of ingress/egress) Track Out(street sweeping) Concrete Washout(condition and freeboard) Portable Toilets/Sanitation Facilities are contained (no apparent leaks/spills) Waste Disposal Containers(no apparent leaks/spills, equipment is in place to cover at the end of business day and during rain events) Vehicle Storage, Fueling, and Maintenance(all equipment is stored in staging area with appropriate BMPs) Landscape Material (applied outside of forecasted rain events) Dust Control measures Non-Stormwater Discharges (properly controlled) Energy Dissipation Device Check Dam Fiber Rolls(linear protection) Silt Fence(linear protection) Drain Inlet Protection Run-on to the site is effectively managed and directed away from all disturbed areas. Are the project SWPPP and BMP plan up to date, available on-site and being properly implemented? Part III. Descriptions of BMP Deficiencies Repairs Implemented: Note - Repairs must begin within 72 hours of identification and, Deficiency complete repairs as soon as possible. Start Date Action 1. 2. 3. 4. • ATTACH ADDITIONAL SHEETS AS NECESSARY 2026 Pioneer Trail Waterline Project 60 February 13, 2026 QUALIFIED RAIN EVENT BMP INSPECTION REPORT Visual Inspection Field Lo Sheet Date and Time of Inspection: Report Date: Inspection Type: ❑ Daily ❑ Before ❑ During ❑ Following qualifying predicted rain rain event rain event Site Information Construction Site Name: Construction stage and Approximate area completed activities: of exposed site: Weather and Observations Date Rain Predicted to Occur: Predicted % chance of rain: Estimate storm beginning: Estimate storm Estimate time Rain gauge _ duration: since last reading:_ (date and time) (hours) storm: (inches) (days or hours) Observations: If yes identify location Odors Yes ❑ No ❑ Floating material Yes ❑ No ❑ Suspended Material Yes ❑ No ❑ Sheen Yes ❑ No ❑ Discolorations Yes ❑ No ❑ Turbidity Yes ❑ No ❑ Site Inspections Outfalls or BMPs Evaluated Deficiencies Noted (add additional sheets or attached detailed BMP Inspection Checklists) Photos Taken: Yes ❑ No ❑ Photo Reference IDs: Corrective Actions Identified (note if SWPPP/REAP change is needed) Inspector Information Inspector Name: Inspector Title: Signature: Date: 2026 Pioneer Trail Waterline Project 61 February 13, 2026 Effluent Sampling Field Log Sheets Construction Site Name: Date: Time Start: Sampler: Sampling Event Type: ❑ ❑ Non- ❑ Non-visible pollutant Stormwater stormwater Field Meter Calibration pH Meter ID No./Desc.: Turbidity Meter ID No./Desc.: Calibration Date/Time: Calibration Date/Time: Field pH and Turbidity Measurements Discharge Location Description pH Turbidity Time Grab Samples Collected Discharge Location Description Sample Type Time Additional Sampling Notes: Time End: 2026 Pioneer Trail Waterline Project 62 February 13,2026 Appendix G: REAP 2026 Pioneer Trail Waterline Project 63 February 13,2026 Rain Event Action Plan (REAP) Date of REAP WDID Number: Date Rain Predicted to Occur: Predicted%chance of rain: Predicted Rain Event Triggered Actions Below is a list of suggested actions and items to review for this project. Each active Trade should check all material storage areas, stockpiles,waste management areas,vehicle and equipment storage and maintenance, areas of active soil disturbance, and areas of active work to ensure the proper implementation of BMPs. Project-wide BMPs should be checked and cross- referenced to the BMP progress map. Trade or Activity Suggested action(s)to perform/item(s)to review prior to rain event ❑ Information&Scheduling ❑ Inform trade supervisors of predicted rain ❑ Check scheduled activities and reschedule as needed ❑ Alert erosion/sediment control provider ❑ Alert sample collection contractor(if applicable) ❑ Schedule staff for extended rain inspections ❑ Check Erosion and Sediment Control(ESC)material stock ❑ Review BMP progress map ❑ Other: ❑ Material storage areas ❑ Material under cover or in sheds(ex:treated woods and metals) ❑ Perimeter control around stockpiles ❑ Other: ❑ Waste management areas ❑ Dumpsters closed ❑ Drain holes plugged ❑ Recycling bins covered ❑ Sanitary stations bermed and protected from tipping ❑ Other: ❑ Trade operations ❑ Exterior operations shut down for event(e.g.,no concrete pours or paving) ❑ Soil treatments(e.g.,fertilizer)ceased within 24 hours of event ❑ Materials and equipment(e.g.,tools)properly stored and covered ❑ Waste and debris disposed in covered dumpsters or removed from site ❑ Trenches and excavations protected ❑ Perimeter controls around disturbed areas ❑ Fueling and repair areas covered and bermed ❑ Other: ❑ Site ESC BMPs ❑ Adequate capacity in sediment basins and traps ❑ Site perimeter controls in place ❑ Catch basin and drop inlet protection in place and cleaned ❑ Temporary erosion controls deployed ❑ Temporary perimeter controls deployed around disturbed areas and stockpiles ❑ Roads swept;site ingress and egress points stabilized ❑ Other: ❑ Concrete rinse out area ❑ Adequate capacity for rain ❑ Wash-out bins covered ❑ Other: ❑ Spill and drips ❑ All incident spills and drips,including paint,stucco,fuel,and oil cleaned ❑ Drip pans emptied ❑ Other: 2026 Pioneer Trail Waterline Project 64 February 13,2026 Continued on next page. ❑ Other/Discussion/ ❑ Diagrams ❑ Attach a printout of the weather forecast from the NOAA website to the REAP. I certify under penalty of law that this Rain Event Action Plan(REAP)will be performed in accordance with the General Permit by me or under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the persons who manage the system,or those persons directly responsible for gathering the information,the information submitted is,to the best of my knowledge and belief, true,accurate,and complete. I am aware that there are significant penalties for submitting false information,including the possibility of fine and imprisonment for knowing violations. Date: Qualified SWPPP Practitioner(Use ink please) 2026 Pioneer Trail Waterline Project 65 February 13,2026 Appendix H: Training 2026 Pioneer Trail Waterline Project 66 February 13,2026 Trained Contractor Personnel Log Stormwater Management Training Log and Documentation Project Name: 2026 Pioneer Trail Waterline Project WDID #: ;XXXXXX Stormwater Management Topic: (check as appropriate) ❑ Erosion Control ❑ Sediment Control Wind Erosion Control ❑ Tracking Control ❑ Non-Stormwater Management ❑ Waste Management and Materials Pollution Control Stormwater Sampling Specific Training Objective: Location: Date: Instructor: Telephone: Course Length(hours): Attendee Roster (Attach additional forms if necessary) Name Company Phone As needed, add proof of external training (e.g., course completion certificates, credentials for QSP, QSD). 2026 Pioneer Trail Waterline Project 67 February 13,2026 414r*- CERTIFICATE OF TRAINING COMPLETION OF THE STATE WATER BOARD CBPELSG LICENSEE QSD/QSP SELF-CERTIFICATION TRAINING FOR THE 2009 AND 2022 CONSTRUCTION STORM WATER GENERAL PERMITS C96958 Julia Ashton QSD/P Certificate # Name 4L-4A1' (()Xi 08/14/2025 Signature Date Cr# TRAINING Water Boards -' TEAM CERTIFICATE OF TRAINING COMPLETION OF THE STATE WATER BOARD CBPELSG LICENSEE QSD/QSP SELF-CERTIFICATION TRAINING FOR THE 2009 AND 2022 CONSTRUCTION STORM WATER GENERAL PERMITS C97787 Ariana Mui QSD/P Certificate # Name C & A,1\o 1 ,t&.'v 10/09/2025 Signature Date CGP °. ,F°w • TRAINING Water Boards »' TEAM CERTIFICATE OF TRAININt- CALIFORNIA CONSTRUCTION GENERAL PERMIT Qualified SWPPP Practitioner (QSP) Mary McDaniel January 2, 2025 - January 2, 2027 Certificate #27712 California Stormwater Quality Association and CASQA California Construction General Permit Training Team CALIFORNIA STORMWATER QUALITY ASSOCIATION® ,.,Ni1r, Ecopliant Environmental, Inc. • Ecoplialnt . P.O.Box 188 a•� Parker,CO 80134 CISEC Ph:(720)235-2783 Fax:720-600-2658 E-mail:contactus@ecopliantorg Ecopliant Environmental, Inc. Ecopliant CISEC Wallet Name: Mary McDaniel Order Date: January 2024 Below is your wallet card. Please print this card and keep it in your wallet or your files. Ecopliant Environmental, Inc. As a CISEC Registrant,I agree to the following: • At all times,strictly abide by the Board of Directors Ecopliant CISEC Code of Ethics, Ecopliant. certifies that • Perform all services in a professional . wi_ ENVIHLrI Ma McDaniel manner and uphold professional Mary standards in relating to the public,to has demonstrated satisfactory evidence of sediment and erosion control inspection other Ecopliant CISEC registrants and to Ecopliant skills and successfully passed the certification examination and therefore,as required other professionals within the industry, ENVIRONMENTAL by Ecopliant Environmental,Inc.is authorized to use the title of • Earn at least 12 PDHs each year after P.O.Box 188 Certified Inspector of Sediment and Erosion Control becoming a CISEC registrant,and Parker,CO 80134 �� • Pay the annual renewal fees. 720-235-2783 i 3090 �' December 31,2025 www.ecopliant.org CISEC# Ecopliant Environmental Expire Date President Signature(required) 1 4 , , t) , , . , , • 4 , , 0� BOarde ! c'recto , s 4 certifies that Wlaiyfl-fi(( 4 has demonstrated satisfactory evidence of sediment and erosion control inspection skills and successfully passed the certification examination and therefore, as 4 required by CISF;C, Inc., is authorized to use the title of Certified Inspector of Sediment and Erosion Control 4 Given this 15th day of December 2020 (144AAJL44.(At CISEC, Inc. President CI,JC, Inc. Vice President 4 CISEC 3090 Certification Number 4 ...c... .... ..... moo_, . . moo, / _.....) ..... APEX TUTORING CERTIFICATE OF COMPLETION THIS CERTIFIES THAT arHill SUCCESSFULLY COMPLETED THE 8-HOUR CALTRANS MANDATORY WATER POLLUTION CONTROL MANAGER (WPCM) TRAINING COURSE ON OCTOBER 10, 2020. THIS COURSE AWARDS 8 PDUs. David R'o,r Apex Tutoring D DAVE KORFAS ACHIEVEYOURHGHESTPOTENTAL DEANNA ARRIGO CPESC, CGP TOR, QSD, QISP PE, QSD, CMIT /I AorTo verify the authenticity of this certificate, please email your.apex.tutor@gmail.com. ilk ' ilk : ilk : * ; * : * ' * ' * : ilk,, ' ' ilk ' ilk ' Ilk ' * ' * : alr' * ' * ' ilk ' Ilk : Ilk ' llk alr '. Safety Compliance Management ii is proud-to award this Cert!ficate of Completion et,..1.1 • to ; Mary Hill - for succes�l� comp(ting 4 hours of training testing in 1 California Title 22 Hazardous Waste Generator Training #1398 Presented-this 26 day of July , 20 19 •* . -Ag ‘,.....„, . _ �.i ' /.„ 4., $Cm Safety Compliant nagement Inc. 3160 Crow Canyon Place / �� San Ramon,CA 94583 �� 1-800-974-1419 M. r, *vw4rr4mrc1rr4'vv \ � � \ � \ � � • ♦ /♦ /♦ �♦ I� ♦ • •- ff► IIIIIIIIIIIIIII IIIII IIIIiiiiiiIIIIIIIIIIIIIIIIIIIIIII IIIIIIII II!IIIIIIIIIIIII!!II1IiIIIIIIIIIIIIIIx4 1� , SAN JOAQUIN VALLEY = ,h..1 AIR POLLUTION CONTROL DISTRICT 0 •*4/4 '� COMPLIANCE DIVISION ? '� ,.& .1 0;•Q�iy/ Gl . Presents this " ' 1,`Q•..1 jaA�/�i Certificate of Completion ��' 1�_..i to )l`��/% ;, P.14 Mary Hill _► �,, 1\\`1 j`.41 �f On June 5, 2019 at Modesto for j '44%'''1 >>`1 (es k 1 REGULATION VIII — DUST CONTROL TRAINING `/j1 ��" ire"4 1. San Joaquin valley ''`�) � ;Q• ON iijw•�1 Air Pollution Control District �2 w•Jo 4-6S/Q ..irow .` S' notur Date , 1 (`�:..4 >i•.% I i �1 p�`. r1W►1 'N E d':�•4 i'�'C * 'i':'•C�0,i''C���. ••C 'i'�`C 4 4i t9 4`C w'i':'•C c9 4`C w � )i': C w.t C 'i';• 4.V t:• 11) • ���\��♦�I�♦ I�♦ i�♦U I�♦ •I�♦ I�♦ I�♦• I�♦ •I�♦•U•I�♦• •I�♦ •I�♦U•I�♦ I��♦•v I�♦ I��_J%), Dili\ /�I►\ A,�\ At\ �„�G A,�\ 4t.\ �,�\ gI�\ �-t.\ /�I�\ /mot►\ /�I. /..►\ /�t�\ /��i\ � Appendix I: Construction General Permit 2026 Pioneer Trail Waterline Project 68 February 13, 2026 CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD LAHONTAN REGION 2501 Lake Tahoe Boulevard,South Lake Tahoe,CA 96150 (530)542-5400• Fax(530)544-2271 http://www.waterboards.ca.gov/lahontan ORDER NO. R6T-2016-0010 NPDES NO. CAG616002 GENERAL WASTE DISCHARGE REQUIREMENTS AND NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM GENERAL PERMIT FOR STORM WATER DISCHARGES ASSOCIATED WITH CONSTRUCTION ACTIVITY IN THE LAKE TAHOE HYDROLOGIC UNIT, COUNTIES OF ALPINE, EL DORADO, AND PLACER The following Dischargers are subject to waste discharge requirements as set forth in this General Permit (as authorized by the Notice of Applicability): Table 1. Discharger Information Individuals, public agencies, private businesses, and other legal entities performing construction activities within the Lake Tahoe Hydrologic Unit that Dischargers result in land disturbances of one acre or greater, or less than one acre if part of a larger common plan of development, or as otherwise defined in section II.D.1. of this General Permit. Table 2. Administrative Information This Order was adopted by the Regional Water Quality Control Board on: March 10, 2016 This Order shall become effective on: January 1, 2017 This NPDES Permit shall expire on: December 31, 2021 I, Patty Z. Kouyoumdjian, Executive Officer, do hereby certify that this General Permit with all attachments is a full, true, and correct copy of an General Permit adopted by the California Regional Water Quality Control Board, Lahontan Region, on March 10, 2016. PATTY Z. KOUYOUMDJIAN EXECUTIVE OFFICER TABLE OF CONTENTS I. FINDINGS 1 II. CONDITIONS FOR PERMIT COVERAGE AND NOTIFICATION REQUIREMENTS 7 III. DISCHARGE PROHIBITIONS 13 IV. EFFLUENT LIMITATIONS 14 V. RECEIVING WATER LIMITATIONS 15 VI. PROVISIONS 21 VII. TRAINING QUALIFICATIONS AND CERTIFICATION REQUIREMENTS 24 VIII. BEST MANAGEMENT PRACTICES 25 IX. STORM WATER POLLUTION PREVENTION PLAN (SWPPP) 33 X. COMPLIANCE DETERMINATION 40 LIST OF ATTACHMENTS Attachment A - List of Acronyms Attachment B - Glossary Attachment C - Construction Site Monitoring and Reporting Program Attachment C-1 - Bioassessment Requirements Attachment D - Standard Provisions Attachment E - ATS Requirements Attachment F — SEZ/Floodplain Waste Discharge Prohibitions and Exemptions Attachment G - Water Quality Objectives for Certain Water Bodies Attachment H - SWPPP Checklist Attachment I - Fact Sheet NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit I. FINDINGS The California Regional Water Quality Control Board, Lahontan Region (Lahontan Water Board) finds: A. Background. In 1972, the Clean Water Act (CWA) was amended to provide that the discharge of pollutants to waters of the United States from any point source is unlawful unless the discharge is in compliance with a National Pollutant Discharge Elimination System (NPDES) permit. The 1987 amendments to the CWA added section 402(p), which establishes a framework for regulating municipal and industrial storm water discharges under the NPDES Program. On November 16, 1990, the United States Environmental Protection Agency (USEPA) published final regulations that established storm water permit application requirements for specified categories of industries. The regulations provide that discharges of storm water to waters of the United States from construction projects that encompass five or more acres of soil disturbance are effectively prohibited unless the discharge is in compliance with an NPDES Permit. Regulations (Phase II Rule) that became final on December 8, 1999, lowered the permitting threshold from five acres to one acre. While federal regulations allow two permitting options for storm water discharges (Individual Permits and General Permits), the Lahontan Water Board has elected to adopt this General Permit that will apply to most storm water discharges associated with construction activity within the Lake Tahoe Hydrologic Unit. On April 14, 2011, the Lahontan Water Board reissued the General Permit for Discharges of Storm Water Runoff Associated with Construction Activity Involving Land Disturbance in the Lake Tahoe Hydrologic Unit (Board Order No. R6T-2011- 0019). That General Permit must be reissued to provide continuous coverage for current enrollees. Dischargers of storm water runoff and authorized non-storm water to surface waters in the Lake Tahoe Hydrologic Unit must obtain authorization under this reissued General Permit for construction-related discharges to waters of the United States. To obtain authorization for continued and new-project discharges to waters of the United States, Dischargers must provide a complete application as described in section II of this General Permit. B. Discharge Description. This General Permit regulates discharges of pollutants in storm water associated with construction activity (storm water discharges) to waters of the United States within the Lake Tahoe Hydrologic Unit from construction sites that disturb one or more acres of land surface, or that are part of a common plan of development or sale that disturbs one or more acres of land surface. Construction activity includes demolition that disturbs the land, clearing, grading, excavation, and other land disturbance activities. Waters as used in this General Permit are defined in section 122.2(a) of title 40 of the Code of Federal Regulations (CFR), and include, but are not limited to, wetlands, rivers and streams, either perennial or ephemeral, which flow in natural or artificial watercourses, lakes and impoundments of waters otherwise defined as waters of the US within the State of Page 1 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit California. Discharges of non-storm water to waters may be necessary for the completion of certain construction projects. Such discharges include those listed in Table 4.1-1 of Attachment F. These discharges are conditionally covered under this General Permit. In some cases, construction activities are coordinated with dredged or fill material discharges regulated separately under CWA sections 401 and 404; these may involve stream diversions on or across a project site, cofferdams and sumps for collecting turbid waters. C. Legal Authorities. This General Permit is issued pursuant to section 402 of the CWA and implementing regulations adopted by the USEPA and chapter 5.5, division 7 of the California Water Code (commencing with section 13370). These waste discharge requirements (WDRs) adopted pursuant to article 4, chapter 4, division 7 of the Water Code (commencing with section 13260) shall serve as a NPDES permit for point source discharges of storm water from construction sites disturbing land equal to or in excess of one acre. Section 122.28 of title 40 of the Code of Federal Regulations (40 CFR 122.28) authorizes USEPA and approved states to issue general permits to regulate a point source category if the sources: 1. Involve the same or substantially similar types of operations; 2. Discharge the same type of waste; 3. Require the same type of effluent limitations or operating conditions; 4. Require similar monitoring; and 5. Are more appropriately regulated under a general permit rather than individual permits. On September 22, 1989, USEPA granted the State of California, through the State Water Resources Control Board (State Water Board) and the nine Regional Water Quality Control Boards, the authority to issue general NPDES permits pursuant to 40 CFR parts 122 and 123. This General Permit meets the criteria 1 through 5 listed above. Regulating many storm water discharges under one permit will greatly reduce the administrative burden associated with permitting individual storm water discharges. D. Background and Rationale for Requirements. The Lahontan Water Board developed the requirements in this General Permit based on readily available information for similar construction-associated discharges, the State-wide General Permit for Storm Water Discharges Associated with Construction and Land Disturbance Activities (Order No. 2009-0009-DWQ) and the requirements contained in Order No. R6T-2011-0019. In addition, requirements of this General Permit are consistent with Effluent Limitations Guidelines (ELG) and New Source Performance Standards (NSPS) for the Construction and Development point source category. The Fact Sheet, Attachment I, which contains background information and rationale for General Permit requirements, is hereby incorporated into this General Permit and constitutes part of the Findings for this General Permit. Attachments A through H are also incorporated into this General Permit. Page 2 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit E. California Environmental Quality Act (CEQA). This action to adopt a general NPDES permit is exempt from the provisions of chapter 3 of the California Environmental Quality Act (CEQA) (Public Resources Code sections 21100, et seq.), pursuant to section 13389 of the Water Code. F. Technology-based Effluent Limitations. Section 301(b) of the CWA and implementing USEPA permit regulations at section 122.44, title 40 of the Code of Federal Regulations (40 CFR 122.44), require that permits include conditions meeting applicable technology-based requirements at a minimum, and any more stringent effluent limitations necessary to meet applicable water quality standards. G. Effluent Limitations Guidelines and Standards for the Construction and Development Point Source Category. The USEPA published a final rule with revised regulations establishing CWA technology-based effluent limitations guidelines (ELGs) and New Source Performance Standards (NSPS) for the Construction and Development (C&D) point source category; the final C&D rule became effective on May 4, 2015. 40 CFR part 450 establishes technology-based effluent limitations based on best practicable technology (BPT), best available technology (BAT), best conventional pollutant control technology (BCT), and NSPS reflecting the best available demonstrated control technology. For each of BPT, BAT, BCT, and NSPS, the ELGs establish requirements for erosion and sediment controls, soil stabilization, dewatering activities, pollution prevention measures, prohibited discharges, and outlet requirements. Additionally, a BAT numeric effluent limitation for turbidity of 280 NTUs (as a daily maximum value) was set for sites that disturb 10 acres or more of land at one time unless storm water discharges occur as a result of a storm event in that at same day that is larger than the local 2-year, 24- hour storm. H. Water Quality-Based Effluent Limitations. Section 301(b) of the CWA and section 122.44(d) require that permits include limitations more stringent than applicable federal technology-based requirements where necessary to achieve applicable water quality standards. WQBELs have been scientifically derived to implement water quality objectives that protect beneficial uses. Both the beneficial uses and the water quality objectives have been approved pursuant to federal law and are the applicable federal water quality standards. Water Code section 13263 requires that waste discharge requirements "implement any relevant water quality control plans that have been adopted and take into consideration the beneficial uses to be protected, the water quality objectives reasonably required for that purpose, other waste discharges, the need to prevent nuisance and the provisions of section 13241." These requirements, however, only apply to those portions of the permit that exceed the requirements of the federal CWA, and not to those requirements that are necessary to meet the technology-based effluent limitations or the WQBELs necessary to protect water quality objectives for surface waters set out in the Basin Plan. (City of Burbank v. State Water Resources Control Board, 35 Cal. 4th 613, 627.)" Page 3 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit Section 122.44(d)(1)(i) mandates that permits include effluent limitations for all pollutants that are or may be discharged at levels that have the reasonable potential to cause or contribute to an exceedance of a water quality standard, including numeric and narrative objectives within a standard. Where reasonable potential has been established for a pollutant, but there is no numeric criterion or objective for the pollutant, water quality-based effluent limitations (WQBELS) must be established using: (1) USEPA criteria guidance under CWA section 304(a), supplemented where necessary by other relevant information; (2) an indicator parameter for the pollutant of concern; or (3) a calculated numeric water quality criterion, such as a proposed state criterion or policy interpreting the state's narrative criterion, supplemented with other relevant information, as provided in section 122.44(d)(1)(vi). This General Permit does not require effluent limitations more stringent than that required by federal law as it includes effluent limitations for discharges that are specified in the Water Quality Control Plan for the Lahontan Region (Basin Plan) and carried forward from the prior permit. I. Storm Water Benchmark Performance Levels. This General Permit also contains concentration-based, pollutant-specific benchmark values for pH in effluent. The benchmarks and related monitoring and reporting requirements contained in this General Permit are consistent with the Basin Plan. The purpose of the benchmarks is to provide a measure of whether a facility's BMPs are meeting performance levels protective of water quality and beneficial uses. This General Permit requires Dischargers to take actions to evaluate excursions from objectives, improve BMP performance if needed when benchmarks are exceeded, and to conduct monitoring and documentation of such actions. J. Compliance with Effluent Limitations. For purposes of this General Permit, effluent discharges off project boundaries constitute a discharge to surface waters or tributaries to surface waters. This finding is based on the high degree of surface water connectivity in the Lake Tahoe watershed. Therefore, compliance with effluent limitations is required at specified runoff control points where effluent is discharged off project boundaries or to surface waters, including municipal separate storm sewer systems (MS4s). Effluent limits for the discharge to surface waters or MS4s may not apply if the Discharger can document that effluent leaving the project boundaries does not reach surface waters or MS4s. K. Water Quality Control Plans. The Lahontan Water Board adopted a Basin Plan, which became effective on March 31, 1995 and has been subsequently amended. The Basin Plan designates beneficial uses, establishes water quality objectives (WQOs), and contains implementation programs and policies to achieve those objectives for all waters addressed through the plan. Lake Tahoe is a water of the state and a traditionally-navigable water of the United States. Designated beneficial uses of surface waters within the Lake Tahoe Hydrologic Unit include municipal and domestic supply (MUN); agricultural supply (AGR); groundwater recharge (GWR); freshwater replenishment (FRSH); water contact recreation (REC- 1); non-contact water recreation (REC-2); cold freshwater habitat (COLD); cold Page 4 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit spawning, reproduction, and development (SPWN); commercial and sport fishing (COMM); wildlife habitat (WILD); water quality enhancement (WQE); and flood peak attenuation/flood water storage (FLD). Waters at some locations may also be designated for navigation (NAV); preservation of biological habitats of special significance (BIOL); rare, threatened, or endangered species (RARE); and migration of aquatic organisms (MIGR). Table 5.1-1 in the Basin Plan may be consulted for the beneficial use designations for any specific surface water body. In addition, the Basin Plan implements State Water Board Resolution No. 88-63, which established state policy that all waters, with certain exceptions, should be considered suitable or potentially suitable for MUN. Requirements of this General Permit implement the Basin Plan. L. Alaska Rule. On March 30, 2000, USEPA revised its regulation that specifies when new and revised state and tribal water quality standards (WQS) become effective for CWA purposes. (40 CFR 131.21; 65 Fed. Reg. 24641 (April 27, 2000).) Under the revised regulation (also known as the Alaska Rule), new and revised standards submitted to USEPA after May 30, 2000, must be approved by USEPA before being used for CWA purposes. The final rule also provides that standards already in effect and submitted to USEPA by May 30, 2000 may be used for CWA purposes, whether or not approved by USEPA. M. Stringency of Requirements for Individual Pollutants. This General Permit contains both technology-based effluent limitations and WQBELs for individual pollutants. The technology-based effluent limitations consist of restrictions on turbidity, pH, nitrogen (total), phosphorus (total), iron (total), and grease and oil. In addition, the provisions of this General Permit require the implementation of Best Available Technologies/Best Control Technologies (BAT/BCT) and Best Management Practices (BMPs) to control and abate the discharge of pollutants in storm water discharges, and achieve the numerical and narrative standards of this General Permit and those contained in the Basin Plan. This General Permit's technology-based pollutant restrictions implement the minimum, applicable federal technology-based requirements. N. Antidegradation Policy. 40 CFR 131 .12 requires that the state water quality standards include an antidegradation policy consistent with the federal policy. The State Water Board established California's antidegradation policy in State Water Board Resolution No. 68-16. Resolution No. 68-16 incorporates the federal antidegradation policy where the federal policy applies under federal law. Lake Tahoe is an Outstanding National Resource Water under the federal policy and afforded the highest protections, such that no permanent or long-term reduction in water quality is allowed. Resolution No. 68-16 requires that existing quality of waters be maintained unless degradation is justified based on specific findings. The 1 New Source Performance Standards equals the implementation of BAT Page 5 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit Lahontan Water Board's Basin Plan implements, and incorporates by reference, both the state and federal antidegradation policies. Discharges in compliance with this General Permit will not result in water quality less than that prescribed in policies and standards, and are therefore consistent with those policies and standards. O. Anti-Backsliding Requirements. Sections 402(0)(2) and 303(d)(4) of the CWA and federal regulations at title 40, CFR section 122.44(1) prohibit backsliding in NPDES permits. These anti-backsliding provisions require effluent limitations in a reissued permit to be as stringent as those in the previous permit, with some exceptions where limitations may be relaxed. All effluent limitations in this General Permit are at least as stringent as the effluent limitations in Order No. R6T-2011- 0019. Therefore, this General Permit is in compliance with the anti-backsliding provisions of 40 CFR 122.44. P. Endangered Species Act. This General Permit does not authorize any act that results in the taking of a threatened or endangered species or any act that is now prohibited, or becomes prohibited in the future, under either the California Endangered Species Act (Fish and Game Code sections 2050 to 2097) or the Federal Endangered Species Act (16 U.S.C.A. sections 1531 to 1544). This General Permit requires compliance with effluent limits, receiving water limits, and other requirements to protect the beneficial uses of waters of the state. The Discharger is responsible for meeting all requirements of the applicable Endangered Species Act. Q. Monitoring and Reporting. 40 CFR 122.48 requires that all NPDES permits specify requirements for recording and reporting monitoring results. Water Code sections 13267 and 13383 authorize the Lahontan Water Board to require technical and monitoring reports. The Construction Site Monitoring and Reporting Program (CSMRP) establishes monitoring and reporting requirements to implement federal and state requirements and is provided in Attachment C. R. Standard and Special Provisions. Standard Provisions, which apply to all NPDES permits in accordance with 40 CFR 122.41 , and additional conditions applicable to specified categories of permits in accordance with 40 CFR 122.42, are provided in Attachment D. The Discharger must comply with all standard provisions and with those additional conditions that are applicable under 40 CFR 122.42. The Lahontan Water Board has also included in this General Permit special provisions applicable to authorized Dischargers. A rationale for the special provisions contained in this General Permit is provided in the attached Fact Sheet. S. Notification of Interested Parties. The Lahontan Water Board has notified the Dischargers and interested agencies and persons of its intent to prescribe WDRs for the discharge and has given them an opportunity to provide their written comments and recommendations. Details of notification are provided in the Fact Sheet of this General Permit. T. Consideration of Public Comment. The Lahontan Water Board, in a public meeting, provided an opportunity for a public hearing, and considered all comments Page 6 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit pertaining to the discharge. Details are provided in the Fact Sheet of this General Permit. IT IS HEREBY ORDERED that all Dischargers indicating their intention to be regulated under the provisions of this General Permit, and all heirs, successors, or assigns, in order to meet the provisions contained in division 7 of the Water Code and regulations adopted thereunder, and the provisions of the CWA and regulations and guidelines adopted thereunder, shall comply with the following: II. CONDITIONS FOR PERMIT COVERAGE AND NOTIFICATION REQUIREMENTS A. Legally Responsible Person (LRP) To obtain authorization for discharges under this General Permit, the project must meet the eligibility requirements specified in section II.D of this General Permit, and the legally responsible person (LRP) or LRP's Approved Signatory (see definition in Attachment B — Glossary) must certify and file Permit Registration Documents (PRDs). Applicants must provide PRDs, an appropriate filing fee, and any additional information, as specified in section II.D.4 as application for issuance of NPDES permit requirements. PRDs must be provided electronically through the State Water Resources Control Board's (State Water Board's) Storm Water Multi-Application and Report Tracking System (SMARTS) at: https://smarts.waterboards.ca.gov/smarts/faces/SwSmartsLogin.jsp. B. Permit Effective Date This General Permit is effective on January 1, 2017. 1. Dischargers Obtaining Coverage On or After January 1, 2017: All Dischargers seeking coverage under this General Permit on or after January 1, 2017, shall file the required PRDs and filing fee and, prior to commencing land- disturbing activities, must receive a notice through SMARTS indicating the date that coverage begins under the General Permit and the Waste Discharge Identification (WDID) number issued for the project. 2. Dischargers Previously Covered Under Order No. R6T-2011-0019: Dischargers previously subject to Order No. R6T-2011-0019 must comply with Order No. R6T-2011-0019 until the Discharger re-enrolls and receives coverage under this General Permit, a Notice of Termination (NOT) for the project is filed and processed, or January 1, 2017, whichever occurs first. On and after January 1, 2017, all coverage under Order No. R6T-2011-0019 is terminated. Previously enrolled Dischargers failing to file PRDs or other information required to complete an application to renew coverage under this General Permit will lose permit coverage on January 1, 2017, and may be subject to enforcement remedies and liability for construction-related discharges without an NPDES permit. Page 7 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit C. General Permit Coverage 1 . Dischargers shall be subject to the requirements of and covered by this General Permit only after a WDID number has been issued through SMARTS. In order to demonstrate compliance with coverage requirements for this General Permit, Dischargers must be able to present documentation of a valid WDID number upon request. 2. All Dischargers must implement their Storm Water Pollution Prevention Plan (SWPPP), including their Construction Site Monitoring and Reporting Program (CSMRP) prior to commencement of construction. 3. This General Permit does not pre-empt or supersede the authority of other agencies to prohibit, restrict, or control storm water discharges to MS4s or other watercourses within their jurisdictions. 4. This General Permit does not authorize discharges of fill or dredged material regulated by the US Army Corps of Engineers under section 404 of the CWA and does not constitute water quality certification under section 401 of the CWA. 5. This General Permit does not authorize land-disturbing activities in 100-year floodplains or stream environment zones (SEZ) unless an exemption to applicable waste discharge prohibitions is granted in writing. 6. Lahontan Water Board staff is authorized to issue a single WDID number to a Discharger proposing multiple discharges at multiple locations within the Lake Tahoe Hydrologic Unit, provided that the nature of the discharges and the locations are reported and included in the application information provided with the PRDs for this General Permit. D. Eligibility Criteria 1. Discharges covered by this General Permit are limited to storm water and authorized non-storm water discharges to surface waters and to land that are associated with construction activities in the Lake Tahoe Hydrologic Unit (Department of Water Resources Hydrologic Unit No. 634.00) as described in any one of the categories listed below: a. Construction activity including clearing, grading and excavation activities, except operations that result in land disturbance of less than one acre of total land area, and which are not part of a larger common plan of development or sale. b. Construction activity that results in land disturbance of less than one acre if the construction activity is part of a larger common plan of development or sale that disturbs one or more acres. Page 8 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit c. Construction activity that results in land disturbance of one or more acres related to residential, commercial, or industrial development on lands currently used for agriculture or silviculture including, but not limited to, the construction of roads and buildings related to agriculture or silviculture that are considered industrial pursuant to USEPA regulations, such as dairy barns or food processing facilities. d. Construction activity that results in land disturbance of one or more acres associated with linear underground/overhead utility projects (LUP) including, but not limited to, those activities necessary for the installation of underground and overhead linear facilities (e.g., conduits, substructures, pipelines, towers, poles, cables, wires, connectors, switching, regulating and transforming equipment and associated ancillary facilities), underground utility mark-out, potholing, concrete and asphalt cutting and removal, trenching, excavation, boring and drilling, access road and pole/tower pad and cable/wire pull station, substation construction, substructure installation, construction of tower footings and/or welding, concrete and/or pavement repair or replacement, and stockpile/borrow locations. e. Discharges from construction activities that result in land disturbance of one or more acres associated with oil and gas exploration, production, processing, or treatment operations or transmission facilities. 2. Activities specifically not required or eligible to be covered under this General Permit include: a. Disturbance to land associated with municipal facilities under an approved NPDES Storm Water Management Program for routine maintenance to maintain original line and grade, hydraulic capacity, or original purpose of the facilities. b. Disturbances to land surfaces solely related to agricultural operations such as disking, harrowing, terracing and leveling, and soil preparation. c. Discharges of storm water from areas on tribal lands; construction on tribal lands is regulated by a separate federal permit. d. Construction activity that disturbs less than one acre of land, and that is not part of a larger common plan of development or sale. e. Construction activity covered by an individual NPDES Permit for storm water discharges. Page 9 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit 3. Upon receipt of the appropriate PRDs, Lahontan Water Board staff will determine if such a discharge satisfies all of the following conditions: a. The discharge will be generated from construction activity that does not include any other waste discharge activities, except for those described for authorized non-storm water discharges in section II.D.4., below. b. The project does not include permanent disturbance to lands classified as SEZs as defined in the Basin Plan, unless the Lahontan Water Board grants an exemption to applicable discharge prohibitions explicitly in writing. c. The project incorporates appropriate temporary BMPs and low impact development (LID) techniques, as feasible, to infiltrate and/or treat storm water runoff from existing and proposed impervious surfaces on the site as required in this General Permit. d. The project plans include a SWPPP that proposes specific temporary and permanent measures to prevent the discharge of pollutants from the site. e. The project plans include projected dates for: i. Completion of construction; ii. Completion of storm water infiltration and/or treatment facilities; and iii. Completion of any necessary restabilization and revegetation. 4. Discharges of non-storm water may be necessary for certain construction projects. Such discharges include, but are not limited to, irrigation of vegetation, erosion control measures, pipe flushing and testing, and construction dewatering. These discharges are authorized under the following conditions: a. The discharge does not violate any other provision of this General Permit. b. The discharge is not prohibited by the Basin Plan or, if required by the Basin Plan, a prohibition exemption from the Lahontan Water Board has been granted in writing for discharge prohibitions contained in the Basin Plan. c. The Discharger has included and implemented specific BMPs required by this General Permit to prevent or reduce the contact of the non-storm water discharge with construction materials or equipment. For dewatering waste, the Discharger has prepared and provided for review a detailed dewatering and monitoring plan that meets the conditions for Exempted Low Threat Discharges (Attachment F) prior to start of dewatering activities. d. The discharge does not contain toxic constituents in toxic amounts. Page 10 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit 5. Dischargers are eligible for coverage under this General Permit provided that the Discharger provides PRDs and the proper fee to the State Water Board before starting construction activities. Dischargers previously covered under Order No. R6T-2011-0019 must submit their PRDs and receive approval before continuing construction activities after January 1, 2017. PRDs shall include the Notice of Intent (NOI), site maps, and SWPPP. If an Active Treatment System (ATS) is proposed to be used, information required in Attachment E must also be provided as part of the PRDs. An ATS is distinct from other BMPs in that they include the use of chemical coagulation, chemical flocculation, or electro-coagulation to aid in the reduction of turbidity. For proposed construction activity on easements or on nearby property by agreement or permission, the entity responsible for the construction activity must provide the PRDs and filing fee, and shall be responsible for development of the SWPPP. The NOI must be signed in accordance with the signatory requirements of the Standard Provisions (Attachment D). The filing fee shall be provided to: SWRCB Storm Water Section P.O. Box 1977 Sacramento, CA 95812 Or hand delivered to: SWRCB Storm Water Section 1001 I Street — 15th Floor Sacramento, CA 95814 6. Construction activities that involve alteration of a lake-bed or stream channel may require prior written agreement with the California Department of Fish and Wildlife. A copy of the application, and any written agreement or agreement waiver must be provided with the NOI. 7. The Discharger, upon written request, provides additional information necessary to ascertain whether the discharge meets the criteria for coverage under this General Permit. 8. No discharge under this General Permit is authorized until a written WDID number is issued. 9. Notwithstanding the provisions of this section, the Lahontan Water Board may consider adoption of an individual NPDES permit for any discharge, after due notice and a public meeting, when desirable or necessary. Page 11 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit E. Termination of Coverage 1 . The Discharger will retain coverage under this General Permit and be billed annually until a NOT is requested through SMARTS and approved by Lahontan Water Board staff. Permit coverage may be terminated based on one of the following: a. Construction is complete or suspended — For NOT approval, the Discharger must certify in the NOT request that: i. The construction project is complete and there is no potential for construction-related storm water pollution or pollutant discharges; ii. All construction materials and waste have been removed from the project site and disposed of properly; iii. All elements of the SWPPP have been completed; iv. Permanent BMPs have been installed and all disturbed soil areas (DSA) are stabilized to prevent and control erosion (RUSLE/RUSLE 2 or Custom Method); and v. Post-construction storm water control requirements have been met; or b. The site cannot discharge storm water to waters of the United States — For NOT approval, the Discharger must certify that all storm water is either retained on site or all storm water is discharged to off-site evaporation or percolation ponds; or c. Storm water discharge from the site is now subject to another NPDES general or individual permit — For NOT approval, the Discharger must certify the NPDES permit number and date of coverage; or d. The site was transferred to another operator/owner— For NOT approval the Discharger must certify the date of transfer, notify the new operator/owner, and provide the new operator/ owner contact information. If the project lands are transferred to new ownership before construction is complete, the Discharger must temporarily stabilize the site such that it remains stable until construction activity resumes. The new owner must also apply for coverage under this General Permit, as described above, and may be liable for construction related discharges without an NPDES permit for any period when the project discharge is not covered under this General Permit. 2. As part of the NOT request, the Discharger must provide site photographs and a written narrative describing how the site has been and will remain stabilized. Site- specific evaluation of stability may include parameters such as slope and aspect, percent total cover, percent vegetative cover, vegetation type, soil nutrient and organic matter content, and soil infiltration rate. Page 12 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit 3. For sites where final stabilization relies on the establishment of mature vegetation, the Discharger must describe and certify that a plan is in place to monitor and maintain stable conditions until the site is self-sustaining. 4. The Discharger is required to pay the annual fee (as specified in the annual billing received from the State Water Board) until the permit coverage is officially terminated in writing by Lahontan Water Board staff. Lahontan Water Board staff may inspect the site, as necessary, to determine if the project qualifies for permit termination. If Lahontan Water Board staff denies termination of coverage under the General Permit, written notification with the reasons for denial will be provided through SMARTS. III. DISCHARGE PROHIBITIONS The Basin Plan contains certain waste discharge prohibitions that apply region-wide or specifically to the Lake Tahoe Hydrologic Unit and are listed below. Waste discharge prohibitions listed below do not apply to discharges of storm water when wastes in the discharge are controlled through the application of management practices or other means and the discharge does not cause a violation of WQO. Additionally, the Lahontan Water Board has determined non-storm water discharges, such as construction dewatering and other construction-related discharges, may qualify as low threat discharges that are exempt from applicable region-wide and hydrologic unit/area waste discharge prohibitions under certain conditions. Waste discharge prohibition exemptions allowed under the Basin Plan are presented in Attachment F and, except for discharges listed in Attachment F, Table 4.1-1, must be specifically granted in writing by the Lahontan Water Board. Region-wide Prohibitions A. The discharge of waste that causes violation of any narrative or numeric WQO contained in the Basin Plan is prohibited. B. Where any numeric or narrative WQO contained in the Basin Plan is already being violated, the discharge of waste that causes further degradation or pollution is prohibited. C. The discharge of waste that could affect the quality of waters of the state that is not authorized by the State or Regional Board through waste discharge requirements, waiver of waste discharge requirements, NPDES permit, cease and desist order, certification of water quality compliance pursuant to CWA section 401, or other appropriate regulatory mechanism is prohibited. D. The discharge of untreated sewage, garbage, or other solid wastes into surface waters of the Region is prohibited. E. The discharge of pesticides to surface waters or ground waters is prohibited. Page 13 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit Lake Tahoe Hydrologic Unit Prohibitions F. The discharge attributable to human activities of any waste or deleterious material to surface waters of the Lake Tahoe Hydrologic Unit is prohibited. G. The discharge attributable to human activities of any waste or deleterious material to land below the highwater rim of Lake Tahoe or within the 100-year floodplain of any tributary to Lake Tahoe is prohibited. H. The discharge attributable to human activities of any waste or deleterious material to SEZs in the Lake Tahoe Hydrologic Unit is prohibited. I. The discharge or threatened discharge attributable to new pier construction of wastes to significant spawning habitats or to areas immediately offshore of stream inlets in Lake Tahoe is prohibited. J. The discharge of garbage or other solid waste to lands within the Lake Tahoe Basin is prohibited. K. The discharge of industrial waste within the Lake Tahoe Basin is prohibited. Industrial waste is defined as any waste resulting from any process or activity of manufacturing or construction. IV. EFFLUENT LIMITATIONS Storm water runoff generated from land disturbing activities should be infiltrated to the greatest extent possible. Waters infiltrated into soils should not contain excessive concentrations of nutrients that may exceed the filtering capacity of the soils and vegetation. Runoff that is allowed to discharge off the project boundaries must meet the following effluent limitations. A. All storm water runoff generated within the project area that is discharged to surface waters, MS4s, or other storm water conveyances must not contain constituents in excess of the following numeric effluent limitations (NEL): Page 14 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit Table 3. Storm Water Effluent Limitations Parameter Units Maximum Daily Effluent Limitations For Discharge Total Nitrogen (as N) mg/L 0.5 Total Phosphorus (as P) mg/L 0.1 Total Iron mg/L 0.5 Turbidity NTU 20* Grease and Oil mg/L 2 Note*- For ATS use, 10 NTU as daily average and 20 NTU for any single sample. B. All waters generated within the project area, or as a result of the development of the project, that are discharged to surface waters, MS4s, or other storm water conveyances must not contain the following: 1. Substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, or animal life; and 2. Coliform organisms attributable to human wastes. C. For protection of receiving waters the pH of effluent samples should not fall outside of the range of 6.0 to 9.0. This range is set as a numeric benchmark level. If the pH of effluent is outside of the benchmark, the Discharger must investigate the cause of the excursion and implement appropriate corrective measures. If the pH levels are determined to be from natural causes, the Discharger must provide data (e.g., from run-on) to demonstrate this condition. V. RECEIVING WATER LIMITATIONS The following objectives apply to all surface waters within the Lake Tahoe Hydrologic Unit and include both region-wide receiving water limits and receiving water limits established for specific water bodies within the Lake Tahoe Hydrologic Unit. If more stringent applicable water quality standards are promulgated or approved pursuant to section 303 of the Federal CWA or amendments thereto, the Lahontan Water Board may revise and modify this General Permit accordingly. The discharge of waste must not cause or contribute to a violation of the following objectives. A. Receiving Water Limits for Surface Waters — Region-wide 1. Ammonia The neutral, unionized ammonia species (NH3) is highly toxic to freshwater fish. The fraction of toxic NH3 to total ammonia species (NH4+ + NH3) is a function of temperature and pH. Basin Plan Tables 5.1-5 and 5.1-6 were derived from USEPA ammonia criteria for freshwater. Ammonia concentrations shall not exceed the values listed for the corresponding conditions in these tables. For temperature and pH values not explicitly identified in these tables, the most conservative value Page 15 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit neighboring the actual value may be used or criteria can be calculated from numerical formulas developed by the USEPA. 2. Bacteria, Coliform Waters shall not contain concentrations of coliform organisms attributable to anthropogenic sources, including human and livestock wastes. The fecal coliform concentration during any 30-day period shall not exceed a log mean of 20/100 ml, nor shall more than 10 percent of all samples collected during any 30-day period exceed 40/100 ml. The log mean shall ideally be based on a minimum of not less than five samples collected as evenly spaced as practicable during any 30-day period. However, a log mean concentration exceeding 20/100 ml for any 30-day period shall indicate violation of this objective even if fewer than five samples were collected. 3. Biostimulatory Substances Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect the water for beneficial uses. 4. Chemical Constituents Waters designated as MUN shall not contain concentrations of chemical constituents in excess of the maximum contaminant levels (MCLs) or secondary maximum contaminant levels (SMCLs) based upon drinking water standards specified in the following provisions of title 22 of the California Code of Regulations (CCR) which are incorporated by reference into this General Permit: Table 64431- A of section 64431 (Inorganic Chemicals), Table 64431-B of section 64431 (Fluoride), Table 64444-A of Section 64444 (Organic Chemicals), Table 64449-A of section 64449 (SMCLs-Consumer Acceptance Limits), and Table 64449-B of section 64449 (SMCLs-Ranges). This incorporation-by-reference is prospective including future changes to the incorporated provisions as the changes take effect. Waters designated as AGR shall not contain concentrations of chemical constituents in amounts that adversely affect the water for beneficial uses (i.e., agricultural purposes). Waters shall not contain concentrations of chemical constituents in amounts that adversely affect the water for beneficial uses. 5. Chlorine, Total Residual For the protection of aquatic life, total chlorine residual shall not exceed either a median value of 0.002 mg/L or a maximum value of 0.003 mg/L. Median values shall be based on daily measurements taken within any six-month period. 6. Color Waters shall be free of coloration that causes nuisance or adversely affects the water for beneficial uses. Page 16 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit 7. Dissolved Oxygen The dissolved oxygen concentration, as percent saturation, shall not be depressed by more than 10 percent, nor shall the minimum dissolved oxygen concentration be less than 80 percent of saturation. For waters with the beneficial uses of COLD, COLD with SPWN, WARM, and WARM with SPWN, the minimum dissolved oxygen concentration shall not be less than that specified in Basin Plan Table 5.1-8. 8. Floating Materials Waters shall not contain floating material, including solids, liquids, foams, and scum, in concentrations that cause nuisance or adversely affect the water for beneficial uses. For natural high quality waters, the concentrations of floating material shall not be altered to the extent that such alterations are discernable at the 10 percent significance level. 9. Oil and Grease Waters shall not contain oils, greases, waxes or other materials in concentrations that result in a visible film or coating on the surface of the water or on objects in the water, that cause nuisance, or that otherwise adversely affect the water for beneficial uses. For natural high quality waters, the concentration of oils, greases, or other film or coat generating substances shall not be altered. 10. Nondegradation of Aquatic Communities and Populations All wetlands shall be free from substances attributable to wastewater or other discharges that produce adverse physiological responses in humans, animals, or plants; or which lead to the presence of undesirable or nuisance aquatic life. All wetlands shall be free from activities that would substantially impair the biological community as it naturally occurs due to physical, chemical and hydrologic processes. 11. pH In fresh waters with designated beneficial uses of COLD, changes in normal ambient pH levels shall not exceed 0.5 pH units. For all other waters, the pH shall not be depressed below 6.5 nor raised above 8.5. The Regional Board recognizes that some waters of the Region may have natural pH levels outside of the 6.5 to 8.5 range. Compliance with the pH objective for these waters will be determined on a case-by-case basis. 12. Radioactivity Radionuclides shall not be present in concentrations which are deleterious to human, plant, animal, or aquatic life, nor which result in the accumulation of Page 17 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit radionuclides in the food web to an extent which presents a hazard to human, plant, animal, or aquatic life. Waters designated as MUN shall not contain concentrations of radionuclides in excess of the limits specified in Table 4 of section 64443 (Radioactivity) of title 22 of the CCR which is incorporated by reference into this General Permit. This incorporation-by-reference is prospective including future changes to the incorporated provisions as the changes take effect. 13. Sediment The suspended sediment load and suspended sediment discharge rate of surface waters shall not be altered in such a manner as to cause nuisance or adversely affect the water for beneficial uses. 14. Settleable Materials Waters shall not contain substances in concentrations that result in deposition of material that causes nuisance or that adversely affects the water for beneficial uses. For natural high quality waters, the concentration of settleable materials shall not be raised by more than 0.1 milliliter per liter. 15. Suspended Materials Waters shall not contain suspended materials in concentrations that cause nuisance or that adversely affects the water for beneficial uses. For natural high quality waters, the concentration of total suspended materials shall not be altered to the extent that such alterations are discernible at the 10 percent significance level. 16. Suspended Sediment Suspended sediment concentrations in streams tributary to Lake Tahoe shall not exceed a 90th percentile value of 60 mg/L. (This objective is equivalent to the Tahoe Regional Planning Agency's regional "environmental threshold carrying capacity" standard for suspended sediment in tributaries.) 17. Taste and Odor Waters shall not contain taste or odor-producing substances in concentrations that impart undesirable tastes or odors to fish or other edible products of aquatic origin, that cause nuisance, or that adversely affect the water for beneficial uses. For naturally high quality waters, the taste and odor shall not be altered. 18. Temperature The natural receiving water temperature of all waters shall not be altered unless it can be demonstrated to the satisfaction of the Lahontan Water Board that such an alteration in temperature does not adversely affect the water for beneficial uses. For waters designated COLD, the temperature shall not be altered. Temperature objectives for COLD interstate waters and WARM interstate waters are as specified in the "Water Quality Control Plan for Control of Temperature in Page 18 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit the Coastal and Interstate Waters and Enclosed Bays and Estuaries of California" including any revisions. This plan is summarized in Basin Plan Chapter 6 (Plans and Policies) and included in Basin Plan Appendix B. 19. Toxicity All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, bioassays of appropriate duration and/or other appropriate methods as specified by the Lahontan Water Board. The survival of aquatic life in surface waters subjected to a waste discharge, or other controllable water quality factors, shall not be less than that for the same water body in areas unaffected by the waste discharge, or when necessary, for other control water that is consistent with the requirements for"experimental water" as defined in Standard Methods for the Examination of Water and Wastewater (American Public Health Association, et al. 1998). 20. Turbidity Waters shall be free of changes in turbidity that cause nuisance or adversely affect the water for beneficial uses. Increases in turbidity shall not exceed natural levels by more than 10 percent. B. Receiving Water Limits for Surface Waters - Certain Water Bodies The following objectives (listed alphabetically) and the objectives listed in Attachment G are in addition to the region-wide objectives specified above and supersede the region-wide objectives in the event of any conflict. These objectives apply to certain surface waters of the Lake Tahoe Hydrologic Unit. The discharge of waste must not cause or contribute to a violation of these objectives. 1. Algal Growth Potential For Lake Tahoe, the mean algal growth potential at any point in the Lake shall not be greater than twice the mean annual algal growth potential at the limnetic reference station. The limnetic reference station is located in the north central portion of Lake Tahoe. It is shown on maps in annual reports of the Lake Tahoe Interagency Monitoring Program. Exact coordinates can be obtained from the U.C. Davis Tahoe Research Group. 2. Biological Indicators For Lake Tahoe, algal productivity and the biomass of phytoplankton, zooplankton, and periphyton shall not be increased beyond the levels recorded in 1967-71, based on statistical comparison of seasonal and annual means. The "1967-71 levels"are reported in the annual summary reports of the "California-Nevada- Federal Joint Water Quality Investigation of Lake Tahoe"published by the California Department of Water Resources. Page 19 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit 3. Clarity For Lake Tahoe, the vertical extinction coefficient shall be less than 0.08 per meter when measured below the first meter. When water is too shallow to determine a reliable extinction coefficient, the turbidity shall not exceed 3 Nephelometric Turbidity Units (NTU). In addition, turbidity shall not exceed 1 NTU in shallow waters not directly influenced by stream discharges. The Lahontan Water Board will determine when water is too shallow to determine a reliable vertical extinction coefficient based upon its review of standard limnological methods and on advice from the U.C. Davis Tahoe Research Group. 4. Conductivity, Electrical In Lake Tahoe, the mean annual electrical conductivity shall not exceed 95 umhos/cm at 25°C at any location in the Lake. 5. pH In Lake Tahoe, the pH shall not be depressed below 7.0 nor raised above 8.4. 6. Plankton Counts For Lake Tahoe, the mean seasonal concentration of plankton organisms shall not be greater than 100 per ml and the maximum concentration shall not be greater than 500 per ml at any point in the Lake. 7. Suspended Sediment Suspended sediment concentrations in streams tributary to Lake Tahoe shall not exceed a 90th percentile value of 60 mg/L. (This objective is equivalent to the Tahoe Regional Planning Agency's regional "environmental threshold carrying capacity" standard for suspended sediment in tributaries.) 8. Transparency For Lake Tahoe, the annual average Secchi disk deep water transparency shall not be decreased below 29.7 meters, the levels recorded in 1967-71. The discharge shall not cause or contribute to a violation of any applicable water quality standard for receiving water adopted by the Lahontan Water Board or State Water Board as required by the Federal Water Pollution Control Act and regulations adopted thereunder. Discharges shall not cause or contribute to the receiving WQOs listed in Attachment G to be exceeded for the specified surface waters and tributaries thereto. If more stringent applicable water quality standards are promulgated or approved pursuant to section 303 of the Federal CWA or amendments thereto, the Lahontan Water Board may revise and modify this General Permit in accordance with such more stringent standards. C. Receiving Water Limits for Ground Waters — Regionwide The Dischargers shall not cause or contribute to a violation of the following objectives, which apply to all ground waters of the Lahontan Region, including the Lake Tahoe Basin: Page 20 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit 1. Bacteria, Coliform In ground waters designated as MUN, the median concentration of coliform organisms over any seven-day period shall be less than 1.1/100 milliliters. 2. Chemical Constituents Ground waters designated as MUN shall not contain concentrations of chemical constituents in excess of the MCLs or SMCLs based upon drinking water standards specified in the following provisions of title 22 of the CCR which are incorporated by reference into this General Permit: Table 64431-A of section 64431 (Inorganic Chemicals), Table 64431-B of section 64431 (Fluoride), Table 64444-A of section 64444 (Organic Chemicals), Table 64449-A of section 64449 (SMCLs-Consumer Acceptance Limits), and Table 64449-B of section 64449 (SMCLs-Ranges). This incorporation-by-reference is prospective including future changes to the incorporated provisions as the changes take effect. Waters designated as AGR shall not contain concentrations of chemical constituents in amounts that adversely affect the water for beneficial uses (i.e., agricultural purposes). Ground waters shall not contain concentrations of chemical constituents that adversely affect the water for beneficial uses. 3. Radioactivity Ground waters designated as MUN shall not contain concentrations of radionuclides in excess of the limits specified in Table 4 of section 64443 (Radioactivity) of title 22 of the CCR which is incorporated by reference into this General Permit. This incorporation-by-reference is prospective including future changes to the incorporated provisions as the changes take effect. 4. Taste and Odor Ground waters shall not contain taste or odor-producing substances in concentrations that cause nuisance or that adversely affect beneficial uses. For ground waters designated as MUN, at a minimum, concentrations shall not exceed adopted SMCLs specified in Table 64449-A of section 64449 (SMCLs-Consumer Acceptance Limits), and Table 64449-B of section 64449 (SMCLs-Ranges) of title 22 of the CCR which is incorporated by reference into this General Permit. This incorporation-by-reference is prospective including future changes to the incorporated provisions as the changes take effect. VI. PROVISIONS A. Standard Provisions 1 . Dischargers shall comply with all Standard Provisions included in Attachment D, which are made part of this General Permit. Page 21 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit B. Reopener Provisions 1 . If more stringent applicable water quality standards are promulgated or approved pursuant to section 303 of the Federal Water Pollution Control Act or amendments thereto, the Lahontan Water Board may revise and modify this General Permit in accordance with such standards. 2. The Lahontan Water Board may reopen this General Permit to establish new conditions or effluent limitations should monitoring data or other new information indicate that a constituent is discharged at a level that will do any of the following: a. Cause, have reasonable potential to cause, or contribute to an in-stream excursion above any water quality criteria or objective; or b. Cause, have reasonable potential to cause, or contribute to a violation of any WOO in the Basin Plan. 3. The Lahontan Water Board may reopen this General Permit to reflect any site-specific objectives established for the waterbody or changes to beneficial uses for the waterbody resulting from a use attainability analysis or Basin Plan amendment. 4. The Lahontan Water Board may reopen this General Permit to reflect any changes needed to implement amendments to the Basin Plan. C. Provisions for Administrative ContinuanceThis General Permit continues in force and effect until a new General Permit is issued or the Lahontan Water Board rescinds this General Permit. D. Additional Provisions 1 . Dischargers shall comply with the following additional provisions: a. Failure to comply with this permit may constitute a violation of the Water Code and/or the CWA, and is grounds for enforcement action or for permit termination, revocation and re-issuance, or modification. b. The Water Code and the CWA provide for civil liability and criminal penalties for violations of the permit limits including imposition of civil liability or referral to the Attorney General. c. Provisions of the permit are severable. If any provision of the requirements is found invalid, the remainder of the requirements shall not be affected. d. Pursuant to Water Code section 13263(g), no discharge of waste into the waters of the state, whether or not the discharge is made pursuant to waste discharge requirements, shall create a vested right to continue the Page 22 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit discharge. All discharges of waste into waters of the state are privileges, not rights. e. Pursuant to Water Code section 13260(c), any change in the ownership and/or operation of property subject to the permit shall be reported to the Lahontan Water Board. Notification of applicable permit requirements shall be furnished in writing to the new owners and/or operators, and a copy of such notification shall be sent to the Lahontan Water Board. f. If a Discharger becomes aware that any information provided to the Lahontan Water Board is incorrect, the Discharger shall immediately notify the Lahontan Water Board, in writing, and correct that information. g. Pursuant to Water Code section 13267 and/or section 13383, Dischargers shall comply with the CSMRP, and future revisions thereto, in Attachment C of this General Permit, and any additional monitoring requirements as specified by the Lahontan Water Board Executive Officer. 2. Unless specifically granted in writing by the Lahontan Water Board, authorization pursuant to this General Permit does not constitute an exemption to applicable discharge prohibitions prescribed in the Basin Plan. 3. Dischargers must comply with the lawful requirements of municipalities, counties, drainage districts, and other local agencies regarding discharges of storm water to drainage systems or other water courses under their jurisdiction, including applicable requirements in municipal storm water management programs developed to comply with NPDES General Permits issued to local agencies by the Lahontan Water Board. 4. Dischargers shall at all times fully comply with engineering plans, specifications, and technical reports provided with the PRDs. 5. Dischargers shall at all times fully comply with the SWPPP and Rain Event Action Plan (REAP). 6. In accordance with section 13260 of the Water Code, Dischargers shall file a report with the Lahontan Water Board of any material change or proposed change in the character, location, or volume of the discharge. Any proposed material change in the operation shall be reported to the Lahontan Water Board at least 30 days in advance of implementation of any such proposal. This shall include, but not be limited to, all significant new soil disturbances, all proposed expansion of development, and increase in impervious surface coverage, or any change in drainage characteristics at the project site. 7. Order No. R6T-2011-0019 is rescinded on December 31, 2016, except for enforcement purposes. Page 23 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit VII. TRAINING QUALIFICATIONS AND CERTIFICATIONS REQUIREMENTS A. General Dischargers shall ensure that persons responsible for developing and implementing storm water pollution controls specified by this General Permit shall be appropriately trained and certified in accordance with the requirements below. Additionally, project SWPPP requirements shall be communicated by training all contractor and subcontractor personnel conducting activities that could affect storm water runoff quality. Training may be both formal and informal, as appropriate, and shall at a minimum be provided during pre-construction meetings and regular onsite meetings conducted during the course of the project. Training shall be documented and kept as part of the SWPPP records. Dischargers shall certify in the Annual Report that persons responsible for implementing the requirements of this General Permit have the required qualifications and training. B. SWPPP Certification Requirements 1. Qualified SWPPP Developer: Dischargers shall ensure that SWPPPs are written, amended and certified by a Qualified SWPPP Developer (QSD). A QSD shall have one of the following registrations or certifications, and appropriate experience, as required for: a. A California Board of Professional Engineers, Land Surveyors, and Geologist (CBPELSG) license in good standing as a professional civil engineer, professional geologist, and/or professional engineering geologist; b. A California registered Landscape Architect; c. A professional hydrologist registered through the American Institute of Hydrology; d. A Certified Professional in Erosion and Sediment Control (CPESC)TM registered through EnviroCert International, Inc; e. A Certified Professional in Storm Water Quality (CPSWQ)TM registered through EnviroCert International, Inc.; or f. A professional in erosion and sediment control registered through the National Institute for Certification in Engineering Technologies (NICET). Page 24 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit 2. Required QSD Training: A QSD shall have attended a State Water Board-sponsored or -approved QSD training course and pass a required examination covering the course material or meet the State Water Board requirements for a California Board of Professional Engineer, Land Surveyors and Geologists (CBPELSG) licensee. 3. Qualified SWPPP Practitioner: Dischargers shall ensure that implementation of all BMPs required by this General Permit and all other SWPPP elements are overseen and managed by a Qualified SWPPP Practitioner (QSP). A QSP shall be either a QSD or have one of the following certifications: a. A certified erosion, sediment and storm water inspector registered through EnviroCert International, Inc.; or b. A certified inspector of sediment and erosion control registered through Certified Inspector of Sediment and Erosion Control, Inc. 4. Required QSP Training: A QSP shall have attended a State Water Board-sponsored or -approved QSP training course and pass a required examination covering the course material. 5. QSP Responsibilities: The project QSP is responsible for assisting the Discharger to comply with the General Permit through the proper implementation, management, and monitoring of the SWPPP elements and other General Permit requirements. The QSP must directly manage these activities by being present at the site and/or through a communication plan that allows the QSP to actively and effectively manage trained personnel conducting the SWPPP activities. The SWPPP must include a written plan describing how the QSP will oversee and manage all SWPPP activities and the Discharger must maintain written records documenting the QSP's plan implementation and effectiveness. The QSP Management Plan must show how the QSP plans to inspect and report all of the required visual inspections and monitoring requirements, prepare and implement REAPs, prepare and submit water quality exceedance reports, ensure that all employees have current water pollution control training, and correct any construction activities damaging water pollution control practices or causing water pollution. VIII. BEST MANAGEMENT PRACTICES (BMPS) Dischargers shall minimize or prevent pollutants in storm water discharges and authorized non-storm water discharges through the use of controls, structures, Page 25 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit and management practices that achieve BAT for toxic and non-conventional pollutants and BCT for conventional pollutants. Storm water controls and control locations must be described in the SWPPP for the project site. At a minimum, the following types of storm water control measure BMPs must be described in the SWPPP and implemented for the project. A. Site Management Dischargers shall implement appropriate site management measures to control pollutants in site runoff for construction materials that are potential threats to water quality if discharged. The control measures shall include, but are not limited to, the following items. 1. Conduct an inventory of the products used and/or expected to be used and the end products that are produced and/or expected to be produced. This does not include materials and equipment that are designed to be outdoors and exposed to environmental conditions (i.e., poles, equipment pads, cabinets, conductors, insulators, bricks, etc.). 2. Identify potential pollutant sources and areas of the site where BMPs are necessary to reduce or prevent pollutants in storm water discharges and authorized non-storm water discharges. This potential pollutant source list shall identify all non-visible pollutants which are known, or should be known, to occur on the construction site. At a minimum, when developing BMPs, the Discharger shall: a. Consider the quantity, physical characteristics (e.g., liquid, powder, solid), and locations of each potential pollutant source handled, produced, stored, recycled, or disposed of at the site. b. Consider the degree to which pollutants associated with those materials may be exposed to and mobilized by contact with storm water. c. Consider the direct and indirect pathways that pollutants may be exposed to storm water or authorized non-storm water discharges. This shall include an assessment of past spills or leaks, non-storm water discharges, and discharges from adjoining areas. 3. Schedule land-disturbing activities to minimize the duration that bare soils are exposed to erosion. Schedule BMP implementation to coincide with land-disturbing activities - avoid installing BMPs when and where they are not needed. 4. Store chemicals in watertight containers with appropriate secondary containment to prevent any spillage or leakage, and protect from precipitation and surface run-on. For hazardous liquids used in active work Page 26 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit areas, place in appropriate temporary secondary containment when not in use. 5. Separate snow storage and disposal areas from surface waters to prevent direct discharge and avoid surface runoff. Treatment and retention capacity of storm water basins and similar facilities on the land surface must not be compromised by snow storage/management activities. Treatment facilities shall be designed to accommodate snowmelt runoff from designated snow storage and disposal areas. 6. Protect permanent infiltration facilities from receiving turbid discharges or other polluted storm water runoff. If permanent infiltration facilities are used as temporary BMPs, the capacity and functionality of the facilities shall be maintained and/or renovated as needed to ensure pre-project capacity and function prior to requesting General Permit termination. 7. When discharging from basins and impoundments, utilize outlet structures that withdraw water from the surface, unless infeasible. 8. Prevent the discharge of pollutants from sanitation facilities (e.g., portable toilets) to the storm water drainage system or receiving water. Sanitation facilities shall be cleaned/replaced as necessary, and inspected regularly for leaks and spills. 9. Cover waste disposal containers at the end of every business day and during a rain event. 10.Contain and securely protect stockpiled waste material from wind and rain at all times unless actively being used. 11.Protect all loose piles of soil, silt, clay, sand, debris, or other earthen materials such that sediment is prevented from leaving the site. 12.Prevent ground compaction and disturbance activities in unpaved areas not subject to construction. All non-construction areas shall be identified and protected by fencing or other means to limit access. These control measures shall be inspected periodically and shall be repaired when necessary to maintain effectiveness. 13.Develop a spill response plan prior to commencement of construction activities. The plan shall include: a. Descriptions of equipment and materials required to be on site for cleanup of spills/leaks; and b. Descriptions of appropriate spill response procedures, the responsible personnel, and the training records of such personnel. Include Page 27 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit provisions to respond to potentially large spills that are beyond the capacity of the contractor to respond. 14.Ensure the containment of concrete washout areas and other washout areas that may contain additional pollutants so there is no discharge into the underlying soil and onto the surrounding areas. 15.Prevent the discharge of pollutants from equipment and vehicle washing, wheel wash water, and other wash waters. 16.Conduct equipment and vehicle fueling, maintenance and repair activities only in designated areas with appropriate BMPs and containment for spills. 17.Activities such as grading, filling, and clearing of vegetation that disturb soil are prohibited during periods of inclement weather that cause saturated, muddy, or unstable soil conditions. Additionally, by October 15 of each year all disturbed areas must be permanently stabilized or temporarily winterized to prevent excess sediment and other pollutants from discharging off the project site, and land-disturbing activities must cease from October 16 to April 30 of the following year. Winterized means to implement appropriate BMPs to prevent and minimize erosion and soil movement from the site in storm water in a manner that will remain effective until May 1 of the following year. Special regulations apply to construction activities occurring between October 16 and April 30, as follows: a. All areas of the project site must be adequately winterized by October 15 as a condition for continued work on the site. b. The Lahontan Water Board Executive Officer may grant variances to allow limited grading and land disturbance during this period when finding in writing that controls are in place to protect water quality. B. Sediment and Erosion/Stabilization Controls Dischargers shall implement a combination of sediment and erosion controls to prevent or minimize sediment discharges from the site. Control measures shall include, but are not limited to, the following items. 1 . Install temporary sediment controls for the down-gradient perimeter of the project site, and/or any location where storm water or authorized non- storm water may discharge from the project site, prior to the initiation of any construction-related activities. Page 28 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit 2. Install temporary gravel bag dikes, fiber rolls, filter fabric fence, or other equivalent measures as necessary to control erosion and runoff. 3. Install temporary check dams such as gravel bag dikes in concentrated flow lines to slow and detain water flows and retain sediment. 4. Protect drain inlets and outfall structures with appropriate controls for erosion and to minimize sediment discharges. 5. Prevent off-site tracking of earthen materials from the construction site onto adjacent roads and public ways. Dischargers shall control access points, install stabilized entrances/exits for vehicle and equipment traffic operating on the site, and implement sweeping as necessary where tracking prevention is not complete. 6. Provide and maintain natural buffers around surface waters and direct storm water runoff to vegetated areas, unless infeasible. 7. If used, sediment basins must be designed according to the methods provided in California Storm Water Quality Association's (CASQA's) Construction BMP Guidance Handbook or equivalent methods certified by a CBPELSG. 8. Control storm water volume and velocity within the site to minimize soil erosion and offsite discharges. 9. Direct all run-on surface flows from offsite, to the maximum extent possible, away from all disturbed areas. 10.Surface flows from the project site shall be controlled to prevent downstream erosion at any point. 11 .Minimize the disturbance of steep slopes and control the amount of soil exposed to erosion at any particular time during construction activity. 12.Control soil compaction and preserve topsoil as feasible. 13. Implement an effective combination of temporary sediment and erosion controls on DSA prior to the onset of precipitation events. 14.Remove all temporary BMPs and permanently stabilize or vegetate all finished graded areas. Revegetated areas shall be completed using specifications necessary for successful growth and soil cover, and maintained as needed to ensure adequate growth and root development until vegetation becomes established. If mulch cover only is used for stabilization from erosion, Dischargers must demonstrate the mulch will Page 29 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit provide ongoing effectiveness in preventing soil erosion. The following measures are recommended: a. Depending on the level of disturbance and site conditions, wood chip mulch, pine needle mulch, rock, or other suitable materials may be applied on disturbed surfaces in lieu of vegetation; b. Whenever practical, seeds collected from the project site area should be added to the seed mix being applied during revegetation; c. Whenever practical, natural revegetation and native mulch will be the preferred method of stabilization; and d. Limit the use of plastic materials contained in permanent BMPs. 15.Wind erosion shall be controlled to prevent nuisance and to prevent the transport of dust and soil particles into the air, off the project site, into any surface waters, or into any drainage course. C. Construction Site Dewatering or Diversions Construction site dewatering waste must not be discharged to surface waters or tributaries thereto, including MS4s, unless the discharge meets the criteria for a low threat discharge, or meets the criteria for other exemptions presented in Attachment F. Prior to conducting dewatering activities on a site covered by this General Permit, Dischargers must prepare a dewatering plan as part of the SWPPP. Lahontan Water Board staff will require Dischargers to provide the dewatering plan as part of the project PRDs or upon determining dewatering is necessary. The dewatering/diversion plan shall, at a minimum, include the following: 1 . An explanation of alternatives considered for discharges to land, and why alternatives to discharging to surface waters are infeasible. 2. An assessment of whether soil and/or groundwater contaminated by foreign waste material is present in the dewatering area. 3. The location of the discharge area or outfall and name of receiving water. 4. A description of the discharge or diversion method and plan drawings as necessary. 5. The frequency and estimated volume and rate of discharge. Page 30 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit 6. Expected pollutants and concentrations in discharge, and control measures to be applied and maintained to ensure that the discharge will not cause a violation of water quality objectives. 7. A monitoring plan for effluent and/or receiving waters. Monitoring may include visual observations and/or sample collection and analysis. D. Inspection, Maintenance and Repair Dischargers shall conduct inspections of sites and BMPs in accordance with the requirements of the CSMRP described in Attachment C. Dischargers shall ensure that all inspection, maintenance and repair work is performed or supervised by a QSP representing the Discharger. The QSP may delegate any or all of these activities to an employee appropriately trained to do the tasks. Training must be documented and records kept with the SWPPP. Training documentation must be made available to Lahontan Water Board staff upon request. Dischargers shall conduct maintenance or repair of failed or inadequate BMPs within 72 hours of identification by a QSP or other trained personnel, or before the next predicted rain event, whichever is sooner. E. Rain Event Action Plan (REAP) From the dates of May 1 through October 15 of each year, and during periods in which construction activity is conducted under a variance to the BMP requirements of this General Permit (section VIII.A.16.), Dischargers shall ensure a QSP develops a REAP no later than the calendar day (24 hours) prior to any anticipated precipitation event. An anticipated precipitation event is any weather pattern that is forecast to have a 30 percent or greater chance of producing 0.1 inch of precipitation as rainfall in the project area. During periods when thunderstorm activity is anticipated, the Discharger shall monitor weather conditions during the course of the day, and prepare and implement a REAP if the chance of thunderstorms becomes 30 percent or greater, or when visual observations indicate imminent precipitation. The QSP shall obtain, for each day of construction operations, a printed copy of precipitation forecast information from the National Weather Service (NWS) Forecast Office and keep the copy with the SWPPP monitoring records. Dischargers may access the daily forecasts by entering the city or zip code of the project's location at the following website: http://www.srh.noaa.gov/forecast. The intensity of predicted precipitation may be found at the link for the "Forecast Weather Table Interface." The REAP shall be available onsite, and a QSP shall implement the REAP prior to the onset of an actual precipitation event. The REAP must be Page 31 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit checked and updated daily for storms expected to last over a period of several days. The REAP shall be developed for all phases of construction until the permit coverage is terminated by Lahontan Water Board staff. A REAP, at a minimum, shall include: 1 . QSP name and contact number; 2. The date(s) rain is predicted to occur, and predicted chance of rain; 3. A description of all DSAs, material storage areas, stockpiles, vehicle and equipment storage and maintenance areas, and waste management areas to be protected. 4. For each area described above, list specific items to review and actions to perform prior to the rain event; 5. A description of the labor required or to be provided to complete the protective actions required. 6. A certification by the QSP that the REAP will be carried out as required by this General Permit; and 7. A printout of the NWS weather forecast. F. Active Treatment Systems (ATS) Dischargers choosing to implement an ATS on a project site shall comply with all of the requirements in Attachment E of this General Permit. G. Post-Construction Storm Water Control Requirements All disturbed soils areas must be stabilized to control sediment and other pollutants from entering surface waters. All permanent BMPs used for erosion and sediment control must not contain non-photo/biodegradable materials. Additionally, post-construction storm water controls must meet the criteria below for minimizing and reducing storm water runoff. Municipal and Public Roadway Storm Water Treatment Requirements: Municipal jurisdictions and state highway departments must design projects to meet requirements in the respective municipal storm water NPDES permits. New Development, Redevelopment, and Existing Development Storm Water Treatment Requirements: For new development, re-development, and existing development retrofit projects, Dischargers shall implement low-impact development (LID) techniques and infiltrate stormwater runoff from Page 32 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit impervious surfaces and other developed areas where natural percolation of precipitation is impeded following completion of construction. At a minimum, permanent storm water infiltration facilities must be designed and constructed to infiltrate runoff generated by the 20 year, 1-hour storm which equates to approximately one inch of runoff during a 1-hour period. Where conditions permit, project proponents are encouraged to consider designing post-construction runoff controls in accordance with LID techniques and infiltration facilities to accommodate runoff volumes in excess of the 20 year, 1-hour storm to provide additional storm water treatment. Additional information on LID can be found at the National LID Clearinghouse website: http://www.lid-stormwater.net/clearinghouse/index.html. Runoff from parking lots, retail and commercial fueling stations, and other similar land uses may contain oil, grease, and other hydrocarbon pollutants. Project proponents designing treatment facilities for these areas must include pre-treatment devices to remove hydrocarbon pollutants prior to infiltration or discharge and contingency plans to prevent spills from polluting groundwater. Infiltrating runoff volumes generated by the 20 year, 1-hour storm may not be possible in some locations due to shallow depth to seasonal groundwater levels, unfavorable soil conditions, or other site constraints such as existing infrastructure or rock outcroppings. In the event that site conditions do not provide opportunities to infiltrate the runoff volume generated by a 20 year, 1- hour storm, project proponents must either (1) provide information showing how treatment facilities are expected to meet the numeric effluent limits in Table 5.6-1 of the Basin Plan, or (2) document written acceptance by the local municipality or state highway department to demonstrate that the publicly- owned or municipal storm water treatment facilities treating private property storm water discharges are sufficient to provide adequate treatment to meet any average annual fine sediment and/or nutrient load reduction requirements that may be established by the Lahontan Water Board for the municipality. IX.STORM WATER POLLUTION PREVENTION PLAN (SWPPP) Dischargers must develop and implement a SWPPP to meet the objectives specified below. This General Permit establishes the following requirements for the development and implementation of a SWPPP. Lahontan Water Board staff may require additional information to be added in a SWPPP depending on the nature or complexity of a project. A checklist for developing the SWPPP is provided in Attachment H. A. OBJECTIVES A SWPPP shall be developed and implemented for each construction site covered by this General Permit. The SWPPP shall be designed to comply with Page 33 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit requirements to implement BMPs to achieve compliance with effluent limits and receiving water objectives. The SWPPP shall be developed and amended, when necessary, to meet the following objectives: 1 . Identify pollutant sources including sediment sources that may affect the quality of storm water discharges associated with construction activity. 2. Identify non-storm water discharges. 3. Identify, construct, implement, and maintain BMPs to reduce or eliminate pollutants in storm water discharges and authorized non-storm water discharges from the construction site. 4. Identify all effluent discharge outfall locations, sampling and analysis strategy and protocols, and a sampling schedule for discharges from the identified outfalls for the project area. B. PERMIT REGISTRATION DOCUMENTS (PRDs) The SWPPP shall include a copy of the NOI. C. SWPPP CERTIFICATION AND TRAINING REQUIREMENTS 1 . The SWPPP shall be prepared, signed, and certified by a QSD, who meets the requirements as described in section VII.B. of this General Permit. The SWPPP must also identify the QSP, as defined in section VII.B. of this General Permit. 2. The SWPPP shall include procedures to ensure that all required inspections, maintenance, and repair activities are consistent with the requirements of this General Permit. These procedures shall include identification of specific personnel and the training required to perform inspections, maintenance, and repair. The SWPPP must include a written description of how the QSP will oversee and manage the SWPPP activities. The QSP must be present at the site to oversee SWPPP implementation unless a written communication plan is developed to allow the QSP to manage the site from an off-site location. Any QSP communication plan and all records must be retained in accordance with the record-keeping requirements of this General Permit. A QSP must also provide weekly training on storm water pollution control topics. Training activities must be documented and kept with the SWPPP. Training records must include the date, a description of the topics covered by training, copies of any training materials, the trainer's name, and a list of the training participants with printed names and signatures. Page 34 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit D. AVAILABILITY AND PUBLIC RECORDS ACCESS The SWPPP and any amendments shall be kept on site during construction activity and made available upon request of a representative of the Lahontan Regional Water Board or any local storm water management agency which receives the storm water discharge. The SWPPP is considered a report that shall be available to the public under section 308(b) of the CWA. Upon request by members of the public, Dischargers shall make available for review a copy of the SWPPP directly to the requestor. E. LIST OF CONTRACTORS/SUBCONTRACTORS The SWPPP shall contain a list of all contractors and subcontractors responsible for implementing the SWPPP. This information shall be added to the SWPPP once the contractors and subcontractors selected to implement the SWPPP are determined F. REQUIRED CHANGES 1 . Dischargers shall amend the SWPPP whenever there is a change in construction, or operations, which may affect the discharge or pollutants to surface waters, ground waters, or a municipal or other storm drain system. Lahontan Water Board staff may require SWPPP amendments to be provided for review and may require modifications. 2. Dischargers shall maintain the SWPPP such that it reflects the actual site conditions for the duration of the project, including keeping DSA maps current as the project progresses. Changes in BMP implementation features or activities shall be documented and included as amendments to the SWPPP. An amendment log shall be maintained in the SWPPP that summarizes all changes to the SWPPP for the duration of the project. 3. Lahontan Water Board staff, or a local agency with the concurrence of the Lahontan Water Board staff, may require Dischargers to amend the SWPPP if it is in violation of any condition of this General Permit. G. PROJECT INFORMATION The SWPPP shall include the following information: 1. A copy of this General Permit shall be kept and maintained by Dischargers and be available at all times to operating personnel. 2. Project description; Page 35 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit 3. WDID number; 4. Site address and driving directions; 5. Emergency contact person and 24-hour phone number; and 6. Potential construction site pollutants of concern and sources. H. MAPPING REQUIREMENTS The SWPPP shall include the following maps: 1 . Project Location Map: A topographic map extending one-quarter mile beyond the property boundaries of the construction site, clearly showing: the construction site perimeter and surface water boundaries (including drainage channels, springs, SEZs, 100-year floodplain areas, and wetlands), and the designated discharge locations where the effluent will be controlled and monitored. The requirements of this paragraph may be included in the site map required under the following paragraph if appropriate. 2. Map(s) of a scale sufficient to clearly show: a. The project's construction limit boundaries; b. Areas used to store construction materials, equipment, stockpiles, spoils and wastes, including concrete mixing and washout areas; c. Vehicle and equipment access, fueling, cleaning, storage and service areas; d. Existing and planned paved areas and buildings; e. Areas of existing vegetation to be preserved; f. Surface water locations, including SEZ boundaries mapped according to the criteria in the Basin Plan, section 5.7; 100-year floodplain boundaries; ephemeral and intermittent waterways, springs, and wetlands; g. BMPs: Specific locations of storm water structures and controls to be used during construction. Each control structure shall be represented by a standard symbol as indicated in the site map legend; h. Existing or pre-construction storm water structures and controls to reduce sediment and other pollutants in storm water discharges; i. DSAs: All active DSAs shall be delineated on a map as the project progresses. DSA maps must be kept updated to reflect site conditions. Page 36 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit Once an area is stabilized or winterized, it should be hatched out or otherwise notated to indicate it is no longer disturbed; j. Drainage patterns and slopes anticipated after major grading activities; k. Post-construction storm water structures and controls; I. The locations designated for storm water discharge sampling. See Attachment C for additional detail regarding sampling requirements. 3. Information shown on all maps must be legible (i.e., avoid showing too much information on one map). All maps must include a north arrow, scale (either bar or text format), and a legend with symbols legible in black and white print for all required information. Standard symbols for pollution control structures must be included in the legend of applicable maps. I. CONSTRUCTION AND BMP IMPLEMENTATION SCHEDULE The SWPPP shall include: 1 . The anticipated start and end dates of construction as well as phases of significant grading activities and work in or near drainages or receiving waters. 2. The schedule for deployment of BMPs. BMPs must be implemented, modified, and maintained appropriately for the site and weather conditions encountered during the project. J. SITE MANAGEMENT The SWPPP shall include: 1 . A description of the control measures and management practices to meet the requirements of section VIII of this General Permit. 2. The location of site management controls, shown on a map as described in the Mapping Requirements (section IX.H.). 3. Standard specifications (including engineered drawings if applicable) for construction and installation of such controls. Page 37 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit K. SEDIMENT AND EROSION/STABILIZATION CONTROLS The SWPPP shall include: 1 . A description of control measures and management practices to meet the requirements of section VIII of this General Permit. 2. The location of all sediment and erosion/stabilization controls shown on a map as described in the Mapping Requirements (section IX.H.). 3. Standard specifications (including engineered drawings if applicable) for construction and installation of such controls. L. NON-STORM WATER MANAGEMENT The SWPPP shall include: 1 . A description of control measures and management practices to meet the requirements of section VIII of this General Permit. 2. The location of all non-storm water management controls shown on a map as described in the Mapping Requirements (section IX.H.). 3. Standard specifications (including engineered drawings if applicable) for construction and installation of such controls. M. SPILL PREVENTION AND RESPONSE The SWPPP shall include procedures for preventing and responding to spills. All vehicles with refueling capability must have an emergency spill kit on the vehicle. The SWPPP must describe the response procedures and contact information needed to respond to small, medium, and large spill events. The SWPPP must identify the entity that can respond to large spills that are beyond the capacity of the contractor. N. DEWATERING AND DIVERSIONS The SWPPP shall include a Dewatering and/or Diversion Plan to meet the requirements of section VIII of this Permit if the Discharger will utilize surface water diversions to bypass natural stream flows, or pumps or siphons for removal or ground water from excavations (dewatering) during construction. A Dewatering and/or Diversion Plan, as required, shall be developed as an attachment to the SWPPP. Page 38 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit O. ACTIVE TREATMENT SYSTEM (ATS) PLAN If an ATS is used, Dischargers shall develop an ATS Plan in compliance with Attachment E of this General Permit. The ATS Plan shall be included in the SWPPP. P. POST-CONSTRUCTION STORM WATER MANAGEMENT The SWPPP shall include: 1 . A description of post-construction storm water management structures and controls to meet the requirements of section VIII of this General Permit. 2. The location of all post-construction storm water controls shown on a map as described in the Mapping Requirements (section IX.H.). 3. Standard specifications (including engineered drawings if applicable) for construction and installation of such controls. 4. The operations and maintenance requirements needed to maintain the effectiveness of storm water controls and the responsible party for ensuring that appropriate maintenance is completed. Q. RAIN EVENT ACTION PLAN (REAP) The SWPPP shall include records of NWS forecasts and a REAP prior to predicted storm events to meet the requirements of section VIII of this General Permit. R. CONSTRUCTION SITE MONITORING AND REPORTING PROGRAM (CSMRP) The SWPPP shall include a CSMRP to meet the requirements of Attachment C. S. BMP MAINTENANCE AND REPAIR The SWPPP shall include procedures for conducting maintenance or repair of failed or inadequate BMPs within 72 hours of identification, or before the next predicted rain event, whichever is sooner. T. OTHER PLANS This SWPPP may incorporate, by reference, the appropriate elements of other plans required by local, state or federal agencies. A copy of any requirements incorporated by reference shall be kept at the construction site. Page 39 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit X. COMPLIANCE DETERMINATION Compliance with the effluent limitations contained in section IV of this General Permit will be determined as specified below: A. Compliance with Effluent Limitations Dischargers must identify all runoff control points where effluent may be discharged off the project boundaries. Monitoring for compliance with effluent limitations is not required if there is no discharge off the project boundaries (e.g., all precipitation is infiltrated on the project site). Compliance with the NELs in section IV of this General Permit is required for any discharge at designated runoff control points that is generated by non-storm water discharges or storm events that do not exceed the rainfall associated with a 20-year, 1-hour storm, which, for purposes of this General Permit, is equal to an intensity of 1 inch of rainfall in a 1-hour period (compliance storm event). If constituent concentrations of waters entering the project area (run-on) exceed the numerical limitations specified above, there must be no increase in the constituent concentrations in the waters that are discharged from the project area. Discharge monitoring results shall not be used by Lahontan Water Board staff for determining compliance with NELs for storms with intensities in excess of the compliance storm event or where run-on exceeds the NELs and the discharge does not increase the level of the exceedance. Dischargers are required to provide supporting documentation such as run-on monitoring data, on-site rain gauge data, and/or rainfall data provided by the National Oceanic and Atmospheric Administration (NOAA) to the Lahontan Water Board for any claims that an effluent limit excursion or exceedance occurred due to these circumstances. The supporting information shall clearly show when the sample was collected relative to the occurrence of the compliance storm event (i.e., the time of rainfall relative to the time of sample collection must be documented). The information will be evaluated for the merits of any claim for relief from compliance requirements for the NELs. Additionally, Dischargers must provide documentation for any claim that effluent leaving the project boundaries does not reach receiving waters or MS4s for relief from the NELs for discharges to surface waters. B. Multiple Sample Data The NELs in this General Permit are evaluated as a maximum daily effluent limitation (MDEL). Pursuant to NPDES regulations (40 CFR part 122.2), maximum daily discharge limitation means the highest allowable "daily Page 40 NPDES General Permit for Storm Board Order No. R6T-2016-0010 Water Discharges Associated with Construction NPDES No. CAG616002 in the Lake Tahoe Hydrologic Unit discharge." Daily discharge means the "discharge or a pollutant" measured during a calendar day or any 24-hour period that reasonably represents the calendar day for purposes of sampling. For pollutants with limitations expressed in units of measurement other than mass, the daily discharge is calculated as the average measurement of the pollutant over the day. For purposes of this General Permit, the daily average effluent value is defined as the arithmetic mean of the daily effluent data. When determining compliance when more than one sample result is available due to collection at multiple discharge points and/or multiple times during the calendar day, the Discharger shall compute the arithmetic mean concentration for each day of discharge. Samples must be representative of the volume and quality of runoff from the site. Sample collection must not be manipulated in such a way as to skew the average daily effluent value. However, Dischargers must provide monitoring data to indicate estimates of the proportional area or flow that each discharge point from the site represents when reporting the data. C. Maximum Daily Effluent Limitation (MDEL) If the average daily concentration exceeds the MDEL for a given parameter, the Discharger will be considered out of compliance for that parameter for that one day only within the reporting period. D. Sampling by Other Parties Sampling may be conducted by persons other than the Discharger. Lahontan Water Board staff, operators of MS4s, or others may analyze storm samples. Samples collected by others may be used with other data to determine MDELs and to conduct compliance determinations, as provided above. Page 41 ATTACHMENT A— ACRONYM LIST ATS - Active Treatment System BAT — Best Available Technology BPJ — Best Professional Judgment BPT — Best Practicable Technology BCT - Best Conventional Pollutant Control Technology BMPs - Best Management Practices C&D — Construction and Development CASQA — California Storm Water Quality Association CCR - California Code of Regulations CEQA - California Environmental Quality Act CFR — Code of Federal Regulations CPESC - Certified Professional in Erosion and Sediment Control CPSWQ - Certified Professional in Storm Water Quality CSMRP - Construction Site Monitoring and Reporting Plan CTR — California Toxics Rule CWA - Clean Water Act DNQ — Detected, but Not Quantified DSA - Disturbed Soil Areas ELG — Effluent Limitations Guidelines LID — Low Impact Development LRP — Legally Responsible Person LUP — Linear Underground/Overhead Utility Projects MATC — Maximum Allowable Threshold Concentration MCLs - Maximum Contaminant Levels MDEL - Maximum Daily Effluent Limitation MDL — Method Detection Limit ML - Minimum Level MRP — Monitoring and Reporting Program MS4 — Municipal Separate Storm Sewer System NAL — Numeric Action Level NEL — Numeric Effluent Limitations NICET - National Institute for Certification in Engineering Technologies NOAA — National Oceanic and Atmospheric Administration NOT — Notice of Termination NOI - Notice of Intent NPDES — National Pollutant Discharge Elimination System NSPS - New Source Performance Standards NTU — Nephelometric Turbidity Units NWS — National Weather Service O&M — Operation and Maintenance PRDs - Permit Registration Documents QA/QC — Quality Assurance/Quality Control QSD - Qualified SWPPP Developer QSP - Qualified SWPPP Practitioner Attachment A Page 1 REAP - Rain Event Action Plan RL — Reporting Limit SAFIT — Southwestern Association of Freshwater Invertebrate Taxonomist SEZ - Stream Environment Zones SMCLs — Secondary Maximum Contaminant Levels SMARTS - Storm Water Multi-Application and Report Tracking System SWAMP — Surface Water Ambient Monitoring Program STE — Standard Taxonomic Effort SWPPP - Storm Water Pollution Prevention Plan USEPA — United States Environmental Protection Agency WDID - Waste Discharge Identification WDRs - Waste Discharge Requirements WQBELs - Water Quality-Based Effluent Limitations WQOs —Water Quality Objectives WQS —Water Quality Standards Attachment A Page 2 ATTACHMENT B — GLOSSARY Active Treatment System (ATS) A treatment system that employs chemical coagulation, chemical flocculation, or electrocoagulation to aid in the reduction of turbidity caused by fine suspended sediment. Acute Aquatic Toxicity Test A test to measure the relative severity of chemical toxicity on aquatic life. For aquatic toxicity, an effect observed within 96 hours or less is considered acute. Anticipated Precipitation Event An anticipated storm event is any weather pattern that is forecast to have a 30 percent or greater chance of producing precipitation in the project area, as determined by the precipitation forecast information from the National Weather Service Forecast Office (e.g., by entering the zip code of the project's location at http://www.srh.noaa.gov/forecast). Approved Signatory A person who has been authorized by the Legally Responsible Person to sign, certify, and electronically submit Permit Registration Documents, Notices of Termination, and any other documents, reports, or information required by the General Permit, the state or Lahontan Water Board, or USEPA. The Approved Signatory must be one of the following: 1. For a corporation or limited liability company: a responsible corporate officer. For the purpose of this section, a responsible corporate officer means: (a) a president, secretary, treasurer, or vice-president of the corporation in charge of a principal business function, or any other person who performs similar policy or decision- making functions for the corporation or limited liability company; or (b) the manager of the facility if authority to sign documents has been assigned or delegated to the manager of the facility in accordance with corporate procedures; 2. For a partnership or sole proprietorship: a general partner or the proprietor, respectively; 3. For a municipality, state, federal, or other public agency: a principal executive officer, ranking elected official, city manager, council president, or any other authorized public employee with managerial responsibility over the construction or land disturbance project (including, but not limited to, project manager, project superintendent, or resident engineer); 4. For the military: any military officer or Department of Defense civilian, acting in an equivalent capacity to a military officer, who has been designated; Attachment B Page 1 5. For a public university: an authorized university official; 6. For an individual: the individual, because the individual acts as both the Legally Responsible Person and the Approved Signatory; or 7. For any type of entity not listed above (e.g. trusts, estates, receivers): an authorized person with managerial authority over the construction or land disturbance project. Arithmetic Mean (µ) Also called the average, is the sum of measured values divided by the number of samples. For ambient water concentrations, the arithmetic mean is calculated as follows: Arithmetic mean = µ = Ix / n where: Ix is the sum of the measured ambient water concentrations, and n is the number of samples. Beneficial Uses California Water Code defines beneficial uses as those uses of the waters of the state that must be protected against quality degradation as specified in the Basin Plan. Best Available Technology Economically Achievable (BAT) As defined by USEPA, BAT is a technology-based standard established by the Clean Water Act as the most appropriate means available on a national basis for controlling the direct discharge of toxic and nonconventional pollutants to navigable waters. The BAT effluent limitations guidelines, in general, represent the best existing performance of treatment technologies that are economically achievable within an industrial point source category or subcategory. Best Conventional Pollutant Control Technology (BCT) As defined by USEPA, BCT is a technology-based standard for the discharge from existing industrial point sources of conventional pollutants including biochemical oxygen demand (BOD), total suspended sediment (TSS), fecal coliform, pH, and oil and grease. Best Management Practices (BMPs) Storm water control measures including schedules of activities, prohibitions of practices, maintenance procedures, and other management practices to prevent or reduce the pollution of waters of the United States. Coagulation The clumping of particles in a discharge to settle out impurities, often induced by chemicals such as lime, alum, and iron salts. Common Plan of Development Generally a contiguous area where multiple, distinct construction activities may be taking place at different times under one plan. A plan is generally defined as any piece of documentation or physical demarcation that indicates that construction activities may Attachment B Page 2 occur on a common plot. Such documentation could consist of a tract map, parcel map, demolition plans, grading plans or contract documents. Broad planning documents such as land use master plans, conceptual master plans, or broad-based CEQA or NEPA documents that identify potential projects for an agency or facility are not considered common plans of development. Compliance Storm Event The 20-year, 1-hour storm, equal to 1 inch of rainfall during a 1-hour period. Daily Discharge The discharge of a pollutant measured during any 24-hour period that reasonably represents a calendar day for purposes of sampling. For pollutants with limitations expressed in units of mass, the daily discharge is calculated as the average of the total mass of the pollutant discharged during the day. For pollutants with limitations expressed in other units such as concentration, the daily discharge is calculated as the average measurement of the pollutant throughout the day. The daily discharge may be determined by the analytical results of a composite sample taken over the course of one day (a calendar day or other 24-hour period defined as a day) or by the arithmetic mean of analytical results from one or more grab samples taken over the course of the day from outfalls identified for the project site. Detected, but Not Quantified (DNQ) DNQ are those sample results less than the Reporting Limit (RL), but greater than or equal to the laboratory's Method Detection Limit (MDL). Disturbed Soil Area (DSA) The total soil disturbance for all construction activities associated with the project. Areas of soil disturbance include but, are not limited to: clearing of the land both for access (i.e., access roads) to the site as well as preparing the site for constructing the project; constructing access roads to the site; grading of the project site in total; equipment staging area, maintenance area, and construction easement if they occur atop a soil surface; material and/or soil stockpiles if atop a soil surface; area of asphalt or concrete pavement removal if it is removed entirely to the soil surface; and area that is related to demolition and removal of existing structures if that demolition and removal is to the soil surface. Diversion Activities taken to route flowing water or groundwater around or away from a work site that does not cause a measurable change in water quality upstream or downstream of the work area. Dewateri ng Activities taken to remove excess water in an excavation or impoundment by pumping or other mechanical means. Dewatering fluids generally contain pollutants such as sediment. Attachment B Page 3 Direct Discharge The addition of any pollutant to waters of the U.S. from any point source including surface runoff that is collected or channeled by human activity; discharges through pipes, sewers, or other conveyances owned by a state, municipality, or other person that do not lead to a treatment works; and discharges through pipes, sewers, or other conveyances leading into a privately owned treatment works. Discharger The Legally Responsible Person or entity subject to this General Permit. Effluent Any discharge of water by a discharger either to the receiving water or beyond the property boundary controlled by the discharger. Effluent Limitation Any numeric or narrative restriction imposed on quantities, discharge rates, or concentrations of pollutants that are discharged beyond a project boundary from point sources into waters of the U.S., the waters of the contiguous zone, or the ocean. Effluent Limitation Guideline (ELG) ELGs are U.S. national standards for wastewater discharges to surface waters and publicly owned treatment works. The USEPA issues ELGs for categories of industrial sources of water pollution under the Clean Water Act. Emergency A sudden, unexpected occurrence involving a clear and imminent danger, demanding immediate action to prevent or mitigate loss of, or damage to, life, health, property, essential public services, or the environment. Estimated Chemical Concentration The estimated chemical concentration that results from the confirmed detection of the substance by the analytical method below the ML value. Index Period The period of time during which bioassessment samples must be collected to produce results suitable for assessing the biological integrity of streams and rivers. Instream communities naturally vary throughout the seasons and sampling during the index period ensures that samples are collected during a period when communities are stable such that year to year consistency is obtained. The index period for the Lake Tahoe Hydrologic Unit is July 1 through August 15. Legally Responsible Person The Legally Responsible Person (LRP) will typically be the project proponent. The categories of persons or entities that are eligible to serve as the LRP are set forth below. For any construction or land disturbance project where multiple persons or entities are eligible to serve as the LRP, those persons or entities shall select a single LRP. In exceptional circumstances, a person or entity that qualifies as the LRP may Attachment B Page 4 provide written authorization to another person or entity to serve as the LRP. In such a circumstance, the person or entity that provides the authorization retains all responsibility for compliance with the General Permit. Except as provided in category 2(d), a contractor who does not satisfy the requirements of any of the categories below is not qualified to be an LRP. The following persons or entities may serve as an LRP: 1. A person, company, agency, or other entity that possesses a real property interest (including, but not limited to, fee simple ownership, easement, leasehold, or other rights of way) in the land upon which the construction or land disturbance activities will occur for the regulated site. 2. In addition to the above, the following persons or entities may also serve as an LRP: a. For linear underground/overhead projects (LUPs), the utility company, municipality, or other public or private agency that owns or operates the LUP; b. For land controlled by an estate or similar entity, the person who has day-to-day control over the land (including, but not limited to, a bankruptcy trustee, receiver, or conservator); c. For pollution investigation and remediation projects, any potentially responsible party that has received permission to conduct the project from the holder of a real property interest in the land; or d. For U.S. Army Corp of Engineers projects, the U.S. Army Corps of Engineers may provide written authorization to its bonded contractor to serve as the LRP, provided, however, that the U.S. Army Corps of Engineers is also responsible for compliance with the General Permit, as authorized by the Clean Water Act or the Federal Facilities Compliance Act. Maximum Daily Effluent Limitation (MDEL) The highest allowable daily discharge of a pollutant, over a calendar day (or 24-hour period). For pollutants with limitations expressed in units of mass, the daily discharge is calculated as the total mass of the pollutant discharged over the day. For pollutants with limitations expressed in other units of measurement, the daily discharge is calculated as the arithmetic mean measurement of the pollutant over the day. Median The middle measurement in a set of data. The median of a set of data is found by first arranging the measurements in order of magnitude (either increasing or decreasing order). If the number of measurements (n) is odd, then the median = X(„+1)/2. If n is even, then the median = (X„/2 + X(n/2)+1)/2 (i.e., the midpoint between the n/2 and n/2+1). Attachment B Page 5 Method Detection Limit (MDL) MDL is the minimum concentration of a substance that can be measured and reported with 99 percent confidence that the analyte concentration is greater than zero, as defined in title 40 of the Code of Federal Regulations, part 136, Attachment B, revised as of July 3, 1999. Minimum Level (ML) ML is the concentration at which the entire analytical system must give a recognizable signal and acceptable calibration point. The ML is the concentration in a sample that is equivalent to the concentration of the lowest calibration standard analyzed by a specific analytical procedure, assuming that all the method specified sample weights, volumes, and processing steps have been followed. Municipal Separate Storm Sewer System (MS4) A conveyance or system of conveyances (including roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, manmade channels, or storm drains) which is: 1 . owned or operated by a state, city, town, borough, county, parish, district, association, or other public body (created pursuant to applicable federal and bi-state laws) having jurisdiction, that discharges to waters of the United States; including special districts under state law such as a sewer district or drainage district, flood control district, Indian tribe or an authorized Indian tribal organization, or a designated and approved management agency under section 208 of the CWA; 2. designed or used for collecting or conveying storm water; 3. which is not a combined sewer; and 4. which is not part of a Publicly Owned Treatment Works as defined in 40 CFR 122.2. New Source Performance Standards NSPS are pollution control standards issued by the USEPA. NSPS under the CWA set the level of allowable wastewater discharges from new industrial facilities. Non-Storm Water Any wastewater that is not composed entirely of storm water, as defined below. Non-Visible Pollutants Pollutants that cannot be visually observed and are associated with a specific site, material, or activity that can cause a negative impact on water quality. Examples include chlorine, fertilizers, and pesticides/herbicides. Post-Construction BMPs Structural and non-structural controls that detain, retain, or reduce the discharge of wastewater and pollutants to receiving waters after final stabilization is attained. Attachment B Page 6 Qualified SWPPP Developer (QSD) Individual who is authorized to develop and revise SWPPPs. Qualified SWPPP Practitioner (QSP) Individual assigned responsibility for non-storm water and storm water visual observations, sampling and analysis, and responsibility to ensure full compliance with the permit and implementation of all elements of the SWPPP and CSMRP. Rain Event Action Plan (REAP) A written document specific to each storm event, that when implemented, is designed to protect all exposed portions of the site within 24 hours of any likely precipitation. Receiving Water A river, lake, ocean, stream or other watercourse into which effluent is discharged. Reporting Level (RL) RL is the ML (and its associated analytical method) chosen by the Discharger for reporting and compliance determination from the MLs included in this General Permit. The MLs included in this General Permit correspond to approved analytical methods for reporting a sample result that are selected by the Lahontan Water Board either from Appendix 4 of the SIP in accordance with section 2.4.2 of the SIP or established in accordance with section 2.4.3 of the SIP. The ML is based on the proper application of method-based analytical procedures for sample preparation and the absence of any matrix interferences. Other factors may be applied to the ML depending on the specific sample preparation steps employed. For example, the treatment typically applied in cases where there are matrix-effects is to dilute the sample or sample aliquot by a factor of ten. In such cases, this additional factor must be applied to the ML in the computation of the RL. Routine Maintenance Activities intended to maintain the original line and grade, hydraulic capacity, or original purpose of a facility. Run-on Waters that originate offsite and flow onto the project site. Storm Water Multi-Application and Report Tracking System (SMARTS) The State Water Board's electronic system to manage administrative aspects of this General Permit, including obtaining and terminating coverage, and submitting required data and reports. Storm Water Storm water runoff, snow melt runoff, and surface runoff and drainage. It excludes infiltration and runoff from agricultural land. Attachment B Page 7 Structural Controls Any physical facility designed and constructed to mitigate the adverse impacts of storm water and urban runoff pollution. Surface Water All water naturally open to the atmosphere (rivers, lakes, reservoirs, ponds, streams, impoundments, seas, estuaries, etc,). Waters as used in this General Permit are defined in section 122.2(a) of title 40 of the Code of Federal Regulations (CFR), and include, but are not limited to, wetlands, rivers and streams, either perennial or ephemeral, which flow in natural or artificial watercourses, lakes and impoundments of waters otherwise defined as waters of the US within the State of California Wadeable Stream A stream that can be crossed safely by wading during an index period. Water of the United States Generally refers to surface waters, as defined by the USEPA in 40 CFR 122.2. Water Quality Objectives (WQOs) Water quality objectives are defined in the California Water Code as limits or levels of water quality constituents or characteristics that are established for the reasonable protection of beneficial uses of water or the prevention of nuisance within a specific area. Attachment B Page 8 ATTACHMENT C — CONSTRUCTION SITE MONITORING AND REPORTING PROGRAM (CSMRP) Title 40 of the Code of Federal Regulations at section 122.48 (40 CFR 122.48) requires that all NPDES permits specify monitoring and reporting requirements. Water Code sections 13267 and 13383 also authorize the Lahontan Water Board to require technical and monitoring reports. This CSMRP establishes minimum monitoring and reporting requirements for this General Permit, which implement the federal and California regulations. Additional monitoring may be required as specified by the Lahontan Water Board Executive Officer. I. GENERAL MONITORING PROVISIONS A. Samples and measurements taken as required herein shall be representative of the volume and nature of the monitored discharge. All samples shall be taken at the monitoring locations specified below and, unless otherwise specified, before the monitored flow joins or is diluted by any other waste stream, body of water, or substance. Monitoring locations shall be identified in the CSMRP filed as part of the SWPPP with the NOI. Discharge locations may be updated as necessary if certain phases or project segments are completed and permanently stabilized. The updated sampling locations must be maintained in the SWPPP and made available to Lahontan Water Board staff upon request. B. With the exception of field analysis conducted by Dischargers for turbidity and pH, all laboratories analyzing monitoring samples shall be certified by the State Water Board Division of Drinking Water, in accordance with the provision of Water Code section 13176, and must include quality assurance/quality control data with their reports. Dischargers may conduct their own field analysis of turbidity and pH if the Discharger has sufficient capability (qualified trained employees, properly calibrated and maintained field instruments, etc.) to adequately perform the field analysis. C. All monitoring instruments and devices used by Dischargers to fulfill the prescribed monitoring program shall be properly maintained and calibrated as necessary to ensure their continued accuracy. All flow measurement devices shall be calibrated at least once per year to ensure continued accuracy of the devices. D. Dischargers shall ensure that all sampling and sample preservation are in accordance with the current edition of "Standard Methods for the Examination of Water and Wastewater" (American Public Health Associate). E. All sample analyses shall be conducted according to test procedures specified in 40 CFR part 136, or otherwise stated within this Monitoring and Reporting Program. Attachment C Page 1 F. Monitoring results, including non-compliance, shall be reported at intervals and in a manner specified in this Monitoring and Reporting Program. G. All inspection, maintenance repair and sampling activities at the project location shall be performed or supervised by a Qualified SWPPP Practitioner (QSP) representing the Discharger. The QSP may delegate any or all these activities to an employee appropriately trained to do the task(s). Training documentation must be recorded, maintained with the Storm Water Pollution Prevention Plan (SWPPP), and provided to the Lahontan Water Board upon request. H. Dischargers are not required to conduct visual inspections or physically collect samples outside of daylight hours, or when conditions exist that would be dangerous to personnel. Dischargers must conduct visual monitoring during daylight hours of any day of the week; however, Dischargers are only required to collect samples for analysis during active business/working days. For projects conducted under a night work schedule, visual inspections and sampling must be conducted during daylight hours at the frequency described above (i.e., visual inspections any day of the week and sampling during days of active work). Winter period (October 16 through April 30) monitoring requirements are also waived if significant environmental impacts would result from road system use to access the activity area, or if worker safety would be compromised. An explanation of the missed monitoring requirements due to these exceptions shall be recorded in writing and provided to Lahontan Water Board staff with the Annual Report. II. CONSTRUCTION SITE MONITORING AND REPORTING PROGRAM REQUIREMENTS A. Pursuant to Water Code sections 13383 and 13267, Dischargers subject to this General Permit shall develop and implement a written site-specific Construction Site Monitoring and Reporting Program (CSMRP) in accordance with the requirements of this section. The CSMRP shall be developed prior to the commencement of construction activities, and revised as necessary to reflect project revisions. The CSMRP shall be part of the SWPPP. B. Dischargers electing to operate an Active Treatment System (ATS) shall develop and implement a supplemental monitoring program for these systems in accordance with the requirements established in Attachment E of this General Permit. C. The CSMRP shall be developed and implemented to include the monitoring and reporting requirements specified in this CSMRP and shall at a minimum address the following objectives: Attachment C Page 2 1 . Demonstrate that the site is in compliance with the discharge prohibitions and applicable effluent limitations. 2. Determine whether non-visible pollutants are present at the construction site and are causing or contributing to exceedances of water quality objectives. 3. Determine whether immediate corrective actions, additional BMPs, or SWPPP revisions are necessary to reduce pollutants in storm water discharges and authorized non-storm water discharges. 4. Determine whether BMPs included in the SWPPP/REAP are effective in preventing or reducing pollutants in storm water discharges and authorized non-storm water discharges. 5. Demonstrate that appropriate sample collection, handling, and analyses procedures are implemented. III. VISUAL INSPECTIONS A. During the active construction season (defined as May 1 through October 15 for purposes of this General Permit), an inspection of the construction site shall be made each work day. Dischargers working (under an approved variance) during the period from October 16 through April 30 of the following year shall also conduct inspections on a daily basis. During the winter or inactive period (defined as October 16 through April 30 for purposes of this General Permit), Dischargers must conduct inspections at least once per month during daylight hours unless there is complete snow coverage of the site. B. During active construction periods, and including Dischargers working (under an approved variance) during the period from October 16 through April 30 of the following year, a construction site inspection shall also be performed within 24 hours prior to an anticipated precipitation event (chance of precipitation as rain is forecasted at 30 percent or greater), daily during extended rain storm events, and within 24 hours after actual rain storm events. These requirements do not apply during snow storm events. Otherwise during the inactive period (October 16 through April 30 the following year), inspections must be conducted only within 24 hours after rain storm events. This requirement does not apply when the inactive site is covered by snow. If Dischargers cannot complete an inspection within the specified time frames, the reason for the delay shall be recorded in writing and maintained with the next inspection report. C. Inspections shall be performed in accordance with this General Permit, from the commencement of construction activities until termination of coverage under this General Permit. The purpose of the inspections is to Attachment C Page 3 discover potential water quality problems at the construction site so Dischargers can implement corrective measures immediately. The inspections will also be used to document compliance with the conditions of the General Permit and the SWPPP and to evaluate the effectiveness of the SWPPP and the REAP. D. Inspection procedures shall be specified in the CSMRP. Observations at all designated effluent outfalls and other locations where storm water may discharge from the project boundaries to surface waters or municipal storm sewer systems must be included in the specified procedures. Inspections shall be conducted to identify and report the compliance status for following items, as a minimum: 1 . Damage to containment dikes or erosion control fencing. 2. Improperly installed or ineffective erosion control fencing. 3. Unauthorized vehicle access, or vehicle access into designated non- construction areas not subject to disturbance. 4. Boundary fence damage or removal. 5. Disturbed areas with inadequate erosion prevention and sediment control protection. 6. Evidence of any sediment leakage through erosion control fencing or containment dikes. 7. Soil piles and other earthen materials which are unprotected or located in a drainage way. 8. Spilled and improperly stored chemicals, paint, fuel, oil, solvents, sealants, etc. 9. Upstream runoff diversion structures (are in place and operational). 10.Any evidence of sediment tracking from construction equipment. 11.Any signs of soil erosion or deposition down gradient from runoff discharges. 12.Sediment accumulation within onsite storm water drainage control facilities, and facilities in need of maintenance to ensure effectiveness. 13.Any evidence of non-storm water discharges from the project site. The inspection report shall note whether any such discharges are authorized, or are illicit and not authorized. If authorized, the condition of the applicable BMPs must be indicated. Attachment C Page 4 14.Any observed impacts to the receiving water. E. All inspections shall be recorded and maintained on a construction site inspection form provided as part of the CSMRP. Inspection forms shall be maintained and made available to Lahontan Water Board, State Water Board, or USEPA staff, or designated representative, upon request. At a minimum the following information shall be recorded: 1. Weather conditions at the time of the inspection, including presence or absence of precipitation, estimated time of beginning of storm event, duration of storm event, time elapsed since last storm event, and approximate amount of rainfall in inches. 2. Site information, including stage of construction, activities completed, and approximate area of the site exposed to storm water runoff. 3. A description of BMPs evaluated (i.e., erosion controls, sediment controls, chemical and waste controls, and non-storm water controls) including the locations and any deficiencies noted. 4. Observations of any storm water containment areas to detect leaks and ensure maintenance of adequate freeboard. 5. A description of any non-storm water discharges and spills/leaks observed. 6. Observations at all relevant discharge points and downstream locations in the receiving water, including the presence or absence of floating and suspended materials, sheens, discolorations, turbidity, and odors. 7. Any corrective actions required, including any necessary changes to the SWPPP or REAP and the associated implementation dates. 8. Photographs taken during the inspection, if any. 9. Inspector's name, title, and signature. If the inspector is someone other than the QSP, the QSP must review and certify the accuracy of the inspection record. 10.Corrective actions that have been completed in response to the inspection report and the date that they were completed. Attachment C Page 5 IV. STORM WATER MONITORING A. Discharge Monitoring Locations 1 . Dischargers shall perform sampling and analysis of storm water and non-storm water discharges to characterize discharges associated with construction activity from the entire project disturbed area. 2. Effluent samples shall be collected, at a minimum, at all designated discharge points where storm water and authorized non-storm water is discharged offsite. 3. Dischargers shall ensure that effluent samples are representative of the discharge in each drainage area based on visual observation of the water and upstream conditions. 4. Dischargers shall monitor and report site run-on from surrounding areas if there is a reason to believe run-on may contribute to an effluent limit exceedance. Run-on sampling locations shall be identified in the CSMRP if applicable. 5. Dischargers who deploy an ATS on their site, or a portion of their site, shall collect ATS effluent samples and measurements from the discharge pipe or another location representative of the nature of the discharge. 6. Discharge point monitoring locations shall be identified in the CSMRP and updated if disturbed soil areas change during the course of the project. B. Receiving Water Monitoring Locations When receiving water monitoring is determined to apply to the project (see subsection C.3. below), the following shall apply: 1 . Upstream/up-gradient. Dischargers shall obtain upstream/up- gradient receiving water samples from a representative and accessible location as close as possible to, and upstream from the effluent discharge. 2. Downstream/down-gradient. Dischargers shall obtain downstream/down-gradient receiving water samples from a representative and accessible location as close as possible to, and downstream from the effluent discharge. 3. Receiving water monitoring locations shall be identified in the CSMRP. Attachment C Page 6 C. Sampling Requirements 1 . Storm Water Effluent Discharges a. During the active construction season (defined as May 1 through October 15 for purposes of this General Permit), Dischargers shall collect one grab sample from each discharge point where storm water is discharged off the project boundaries and/or to surface waters. A minimum of three samples must be collected for each day that storm water is discharged offsite. If fewer than three discharge points are present at the site, at least three samples shall be collected from the discharge location(s). Dischargers working under an approved variance during the period from October 16 through April 30 of the following year shall also collect samples in accordance with the protocols described above. Samples are only required to be collected during active working/business days. b. Samples shall be analyzed onsite for turbidity using portable field instruments calibrated in accordance with manufacturer specifications. If there is a visible oily sheen at any discharge point, a sample shall be collected and analyzed for grease and oil. Samples shall be collected and analyzed, consistent with Table C- 1 . 2. Non-visible Pollutants in Effluent Dischargers shall identify in the CSMRP potential non-visible pollutants that may contaminate storm water or non-storm water discharged from the project site (i.e., acids and bases, solvents, lubricants, fertilizers; pollutants known to have been spilled and have contaminated the soil; concrete or soil amendments, such as gypsum, that may result in increased pH). If a breach, malfunction, leakage, or spill is identified that has the potential to result in the discharge of a non-visible pollutant, or the discharge of the non-visible pollutants is expected, Dischargers shall perform sampling for the specific non-visible pollutants at the discharge points corresponding to the applicable drainage area. This includes sampling for pH using a portable field meter when runoff has come into contact with uncured concrete or other materials that could affect the pH of effluent. Dischargers shall also collect and analyze a sample of storm water runoff that has not come into contact with the pollutants of concern for comparison with the non-visible pollutant discharge sample. Analyses may include, but are not limited to, indicator parameters such as volatile organic compounds, semi-volatile organic compounds, metals, salts and nutrients such as nitrogen and phosphorus, and other analyses as appropriate. The CSMRP shall specify appropriate Attachment C Page 7 indicator parameters for each non-visible pollutant identified, as well as appropriate analytical methods, detection limits, sampling procedures, and sampling preservation. When possible, these methods should be consistent with 40 CFR part 136 to the maximum extent possible. For protection of receiving waters the pH of effluent samples should not fall outside of the range of 6.0 to 9.0. This range is set as a numeric action level (NAL). If the pH of effluent is outside of the NAL, Dischargers must investigate the cause of the excursion and implement appropriate corrective measures. If the pH levels are determined to be from natural causes, Dischargers must provide data (e.g., from run-on) to demonstrate this condition. 3. Receiving Waters Receiving water sampling may be required for certain projects such as stream, flood plain, stream environment zone, and other restoration projects where land disturbance is adjacent to surface waters and discrete discharge points and effluent outfalls do not exist. In these cases, receiving water sampling is more appropriate to evaluate potential impacts to water quality and the locations must be identified in the CSMRP in lieu of effluent sampling. For these sites, during the period from May 1 through October 15 of each year, Dischargers shall collect a minimum of three samples per day for each day that storm water or authorized non-storm water is discharged to receiving waters at both upstream locations above the project effects and downstream locations below the project area. Samples shall be analyzed onsite for turbidity using portable field instruments calibrated in accordance with manufacturer specifications. Dischargers working under an approved variance during the period of October 16 through April 30 the following year shall collect samples in accordance with the protocols described above. Samples are only required to be collected during active working/business days. Samples shall be analyzed in accordance with Table C-1 . Receiving water sampling does not need to duplicate monitoring requirements if specified separately under a section 401 Water Quality Certification. 4. Upsets and Unauthorized Discharges Receiving water sampling is required if an upset to the storm water controls or other unauthorized effluent is discharged to receiving waters. Samples of the effluent and receiving water, up- and down- stream from the discharge location, must be collected that are representative of the duration and intensity of the discharge. Analyses must be completed in accordance with Table C-1 and include constituents representative of the discharged effluent. Attachment C Page 8 5. Bioassessments Dischargers operating on sites that disturb 30 acres or more of the landscape and have a direct discharge to a wadeable stream or streams shall conduct or participate in benthic macroinvertebrate bioassessment prior to commencement of construction activity, as specified in Attachment C-1. Table C-1. Monitoring Requirements (May 1 through October 15) Parameter Units Test Method Minimum Detection Frequency (see notes) Limit Turbidity NTU 1 1 NTU 2 pH SU 1 0.2 pH 4 EPA 1664 w/silica Grease and Oil mg/L gel treatment (SGT) 2 mg/L 3 Non-visible Pollutants 4 4 4 Bioassessment NA 5 NA 6 Notes: 1 -Shall be field tested with a calibrated portable instrument. 2- Effluent-Minimum of three samples per day storm water is discharged-All designated loctions must be sampled. Receiving waters—When discharge sampling is determined to be inappropriate, collect three samples per day at designated sampling locations for each day that storm water is discharged to receiving waters. 3- Effluent -When visible sheen is observed at discharge point. Receiving Water-When upset or unauthorized discharge occurs involving petroleum hydrocarbons 4-The units,test method, and minimum detection limit shall be identified in the discharger's CSMRP for each non- visible pollutant identified by the discharger. Analytical methods shall be in accordance with 40 CFR Part 136. Monitoring for non-visible pollutants shall be conducted as specified in section IV.C.2 of this MRP(when suspected in the discharge or when the potential to discharge has been determined). 5-The current SAFIT STEs(November 28, 2006)list requirements for both the Level I and Level II taxonomic effort, and area located at http://www.swrcb.ca.gov/swamp/docs/safit/ste_list.pdf. When new editions are published by SAFIT,they will supersede all previous editions. All editions will be posted at the State Water Board's SWAMP website. 6-Applicable only to dischargers with a total project-related ground disturbance of 30 acres or more and a direct discharge to a receiving water. See Attachment C-1. Attachment C Page 9 V. GENERAL REPORTING REQUIREMENTS A. All data and reports must be submitted through the SMARTS and be certified by the LRP or an approved signatory. B. All turbidity and pH analytical results collected from field instruments must be reported within five days after storm event conclusion. All other results determined by an analytical laboratory must be submitted within five days of receipt of the results from the laboratory. C. Dischargers shall report with each sample result the applicable reported Minimum Level (ML) and the current Method Detection Limit (MDL), as determined by the procedure in 40 CFR part 136. D. Dischargers shall report the results of analytical determinations for the presence of chemical constituents in a sample using the following reporting protocols: 1 . Sample results greater than or equal to the reported ML shall be reported as measured by the laboratory (i.e., the measured chemical concentration in the sample). 2. Sample results less than the reporting limit (RL), but greater than or equal to the laboratory's MDL, shall be reported as "Detected, but Not Quantified," or DNQ. The estimated chemical concentration of the sample shall also be reported. 3. For the purposes of data collection, the laboratory shall write the estimated chemical concentration next to DNQ as well as the words "Estimated Concentration" (may be shortened to "Est. Conc."). The laboratory may, if such information is available, include numerical estimates of the data quality for the reported result. Numerical estimates of data quality may be percent accuracy (+ a percentage of the reported value), numerical ranges (low to high), or any other means considered appropriate by the laboratory. E. Dischargers are to instruct laboratories to establish calibration standards so that the ML value (or its equivalent if there is differential treatment of samples relative to calibration standards) is the lowest calibration standard. At no time are Dischargers to use analytical data derived from extrapolation beyond the lowest point of the calibration curve. VI. TWENTY-FOUR-HOUR REPORTING Dischargers shall immediately notify the Lahontan Water Board orally within 24 hours whenever an adverse condition occurs as a result of a discharge. An adverse condition includes, but is not limited to, a violation or threatened violation of the conditions of this General Permit, significant spills of Attachment C Page 10 petroleum products or toxic chemicals, or damage to control facilities that could affect compliance pursuant to section 13267(b) of the California Water Code, a written notification of the adverse condition shall be submitted to the Lahontan Water Board within five (5) business days of occurrence. The written notification shall identify the adverse conditions, describe the actions necessary to remedy the condition and/or the actions implemented to abate the problem from continuing, and specify a timetable, subject to the modifications of the Lahontan Water Board, for remedial actions. In the event that sampling results exceed any applicable NEL, Dischargers shall orally notify the Lahontan Water Board within 24 hours after the NEL exeedance has been identified and electronically submit all storm event sampling results through the SMARTS within five (5) business days after the NEL exceedance has been identified. VII. ANNUAL REPORT On or before November 30 of each year, Dischargers shall prepare and electronically submit through the SMARTS an Annual Report for the period of October 16 of the previous year through October 15 of the current year. The SMARTS reporting module requests the following information: A. The project name and location. B. Any significant problem(s) which occurred during project construction and remedial measures planned or implemented. C. A summary and evaluation of all sampling and analysis results, including copies of laboratory reports and rain gauge measurements, from monitoring activities conducted pursuant to section IV of this CSMRP. D. A certified statement indicating whether or not the site has been winterized in accordance with BMPs for erosion prevention and sediment control. E. Documentation of required QSP certifications and personnel training. Personnel training records shall be maintained on site and include, at a minimum, signed attendance sheets and agendas from pre-construction meetings covering SWPPP requirements. Additional information or training may be recorded as appropriate. The intent of this requirement is to ensure that all construction personnel are educated on their responsibilities for controlling pollutants in storm water and non-storm water discharges. F. A certified statement indicating whether or not the project site is in compliance with the conditions of the General Permit and the SWPPP. This certification shall be signed by a Qualified SWPPP Practitioner (QSP). This certification should be based upon site inspections required in section III of this CSMRP. Attachment C Page 11 VIII. MONITORING AND REPORTING REQUIREMENTS FOR RESTORATION PROJECTS Because restoration projects are often executed to improve existing water quality conditions, it is necessary to monitor restoration project effectiveness. Monitoring information can also identify project and/or construction method strengths and weaknesses. This knowledge can feedback into the maintenance of the existing system and also be applied to future water quality improvement projects. To monitor the success of the restoration of a disturbed area, the project proponent shall submit a detailed Restoration Monitoring Plan as part of the CSMRP with annual performance criteria for the review and approval of the Lahontan Water Board staff. The Restoration Monitoring Plan shall include a contingency plan for actions to be taken if performance criteria are not met. Ideally, pre- and post-construction monitoring is required to best evaluate the success of the restoration project. Monitoring should include, but not be limited to, assessments of vegetative cover and water quality and quantity measurements. Where appropriate, monitoring should also include up- gradient and down-gradient sampling of water entering a pretreatment system (sediment can, sand and oil trap). Recommendations for a Restoration Monitoring Plan include the following (need not duplicate monitoring set as part of a section 401 Water Quality Certification, if applicable to the project): A. Pre- and Post-project surveys of vegetative cover at a representative scale for the site, including an inventory of species diversity and an assessment of the restored soil's ability to infiltrate runoff; B. Pre- and Post-project cross-sectional surveys of stream channel dimensions and elevations (if applicable); C. Post-project monitoring of the planting survival; D. Photo survey including photo-point locations of the disturbed/restored area. E. Pre- and post-project groundwater level measurements from at least two piezometers installed for observing groundwater levels; F. Site assessments of the success of the implemented erosion and sediment control measures; Attachment C Page 12 G. Water quality analyses to include Total N, Total P, Conductivity, and Turbidity at a minimum, in addition to other required sampling under this General Permit. Attachment C Page 13 ATTACHMENT C-1 — BIOASSESSMENT MONITORING GUIDELINES Bioassessment monitoring is required for projects that meet all of the following criteria: 1 . The project directly discharges runoff to a freshwater wadeable stream (or streams) that is either: (a) listed by the State Water Board or USEPA as impaired due to sediment, and/or (b) tributary to any downstream water body that is listed for sediment; and/or have the beneficial use SPAWN & COLD & MIGRATORY AND 2. Total project-related ground disturbance exceeds 30 acres. For all such projects, Dischargers shall conduct bioassessment monitoring, as described in this section, to assess the effect of the project on the biological integrity of receiving waters. Bioassessment shall include: 1 . The collection and reporting of specified instream biological data. 2. The collection and reporting of specified instream physical habitat data. Bioassessment Exception 1 . If a site qualifies for bioassessment, but the construction schedule does not allow for pre- construction sampling within the index period, Dischargers shall: 2. Receive Lahontan Water Board approval for the sampling exception. 3. Invest $7,500.00 times the number of samples required into the SWAMP program as compensation. 4. Make a check payable to: Cal State Chico Foundation (SWAMP Bank Account) or San Jose State Foundation (SWAMP Bank Account) and include the WDID number on the check for the amount calculated for the exempted project. 5. Send a copy of the check to the Lahontan Water Board office. Bioassessment and Physical Habitat Protocols 1 . Site Locations and Frequency. Macroinvertebrate samples shall be collected both before ground disturbance is initiated and after the project is completed. The "after" sample(s) shall be collected after at least one winter season resulting in surface runoff has transpired after project-related ground disturbance has ceased. "Before" and "after" samples shall be collected both upstream and downstream of the project's discharge. Upstream samples should be taken immediately before the sites outfall and downstream samples should be taken immediately after the outfall (when safe to collect the samples). Samples should be collected for each freshwater wadeable stream that is listed as impaired due to sediment, Attachment C-1 Page 1 or tributary to a water body that is listed for sediment. Habitat assessment data shall be collected concurrently with all required macroinvertebrate samples. 2. Index Period. Macroinvertebrate sampling must be conducted between July 1 and August 31, depending on flow conditions (i.e., sampling should occur earlier during the index period in dry years, and later in wet years, but always within the July-August index period). 3. Field Methods. In collecting macroinvertebrate samples and assessing physical habitat, Dischargers shall conduct activities in accordance with the State Water Board's Surface Water Ambient Monitoring Program (SWAMP) protocol "Collecting Benthic Macroinvertebrate Samples &Associated Physical and Chemical Data for Ambient Bioassessments in California — Standard Operating Procedures Manual.' 4. Laboratory Methods. Macroinvertebrates must be identified and classified according to the Standard Taxonomic Effort (STE) Level 2 of the Southwestern Association of Freshwater Invertebrate Taxonomists (SAFIT),2 and using a fixed-count of 600 organisms per sample. Organisms of the family Chironomidae may be identified to the less-intensive level of subfamily. 5. Quality Assurance. Dischargers or their consultant(s) must have and follow a quality assurance (QA) plan that covers the required bioassessment monitoring. The QA plan must include, or be supplemented to include, a specific requirement for external QA checks (i.e., verification of taxonomic identifications and correction of data where errors are identified). External QA checks must be performed on one of the Discharger's macroinvertebrate samples collected per calendar year, or ten percent of the samples per year (whichever is greater). QA samples must be randomly selected. The external QA checks must be paid for by Dischargers, and performed by the California Department of Fish and Wildlife's Aquatic Bioassessment Laboratory. An alternate laboratory with equivalent or better expertise and performance may be used if approved in writing by Lahontan Water Board staff. A copy of the QA plan must be provided to Lahontan Water Board staff upon request. 6. Sample Preservation and Archiving. For purposes of this CSMRP, the quoted terms are described as follows: The "original sample material" is that material (i.e., macroinvertebrates, organic material, gravel, etc.) remaining after the subsample has been removed for identification. The "remaining subsampled material" is that material (e.g., organic material, gravel, etc.) that remains after the organisms to be identified have been removed from the subsample for identification. (Generally, no macroinvertebrates are present in the remaining subsampled material, but this needs to be verified via QA completeness checks.) The "identified organisms" are those organisms within the subsample that are specifically identified and counted. 1 Document may be found on the SWAMP website at http://www.waterboards.ca.gov/water issues/programs/swamp/tools.shtml#methods 2 The STEs developed and maintained by SAFIT list the requirements for Level I and Level II taxonomic effort, and are located at: http://www.safit.org/ste.html.When new editions are published by SAFIT, they will supersede all previous editions. All editions will be posted at SAFIT's website. Attachment C-1 Page 2 The original sample material must be stored in 70 percent ethanol and retained by Dischargers until: 1) all QA analyses specified herein and in the relevant QA plan are completed; and 2) any data corrections and/or re-analyses recommended by the external QA laboratory have been implemented. The remaining subsampled material must be stored in 70 percent ethanol and retained until completeness checks have been performed according to the relevant QA plan. The identified organisms must be stored in 70 percent ethanol, in separate glass vials for each final ID taxon. (For example, a sample with 45 identified taxa would be archived in a minimum of 45 vials, each containing all individuals of the identified taxon.) Each of the vials containing identified organisms must be labeled with taxonomic information (i.e., taxon name, organism count) and collection information (i.e., site name/site code, waterbody name, date collected, collection method). The identified organisms must be archived (i.e., retained) by Dischargers for a period of not less than three years from the date that all QA steps are completed, and must be checked at least once per year and "topped off" with ethanol to prevent desiccation. The identified organisms must be relinquished to the Lahontan Water Board upon request by any Lahontan Water Board staff. 7. Data Submittal. The macroinvertebrate results and other site and method details (i.e., site name, location coordinates, sample date/time, taxonomic identifications consistent with the specified SAFIT STEs, number of organisms within each taxa, etc.), must be submitted to the Lahontan Water Board in electronic format using a completed Surface Water Ambient Monitoring Program (SWAMP) "Taxonomy Results Template" for Benthic-Bioassessment- Algae. The most current version of SWAMP's Taxonomy Results Template (or an equivalent template compatible with the California Environmental Data Exchange Network, "CEDEN") must be used. 8. Invasive Species Prevention. In conducting the required bioassessment monitoring, Dischargers and their consultants must take all reasonable precautions to prevent the introduction or spread of aquatic invasive species. At minimum, Dischargers and their consultants must follow the recommendations of the California Department of Fish and Wildlife to minimize the introduction or spread of the New Zealand mudsnail. Attachment C-1 Page 3 ATTACHMENT D — STANDARD PROVISIONS I. STANDARD PROVISIONS — PERMIT COMPLIANCE A. Duty to Comply 1. The Discharger must comply with all of the conditions of this General Permit. Any noncompliance constitutes a violation of the Clean Water Act (CWA) and the California Water Code and is grounds for enforcement action, for permit termination, revocation and reissuance, or modification; or denial of a permit renewal application. (40 CFR 122.41(a).) 2. The Discharger shall comply with effluent standards or prohibitions established under Section 307(a) of the CWA for toxic pollutants and with standards for sewage sludge use or disposal established under Section 405(d) of the CWA within the time provided in the regulations that establish these standards or prohibitions, even if this Order has not yet been modified to incorporate the requirement. (40 CFR 122.41(a)(1).) B. Need to Halt or Reduce Activity Not a Defense It shall not be a defense for a Discharger in an enforcement action that it would have been necessary to halt or reduce the permitted activity in order to maintain compliance with the conditions of this Order. (40 CFR 122.41(c).) C. Duty to Mitigate The Discharger shall take all reasonable steps to minimize or prevent any discharge or sludge use or disposal in violation of this Order that has a reasonable likelihood of adversely affecting human health or the environment. (40 CFR 122.41(d).) D. Proper Operation and Maintenance The Discharger shall at all times properly operate and maintain all facilities and systems of treatment and control (and related appurtenances) which are installed or used by the Discharger to achieve compliance with the conditions of this Order. Proper operation and maintenance also includes adequate laboratory controls and appropriate quality assurance procedures. This provision requires the operation of backup or auxiliary facilities or similar systems that are installed by a Discharger only when necessary to achieve compliance with the conditions of this Order. (40 CFR 122.41(e).) E. Property Rights 1. This Order does not convey any property rights of any sort or any exclusive privileges. (40 CFR 122.41(g).) Attachment D Page 1 2. The issuance of this Order does not authorize any injury to persons or property or invasion of other private rights, or any infringement of state or local law or regulations. (40 CFR 122.5(c).) F. Inspection and Entry The Discharger shall allow the Lahontan Water Board, State Water Board, United States Environmental Protection Agency (USEPA), and/or their authorized representatives (including an authorized contractor acting as their representative), upon the presentation of credentials and other documents, as may be required by law, to (40 CFR 122.41(i); Wat. Code, § 13383): 1. Enter upon the Discharger's premises where a regulated facility or activity is located or conducted, or where records are kept under the conditions of this Order (40 CFR 122.41(i)(1)); 2. Have access to and copy, at reasonable times, any records that must be kept under the conditions of this Order (40 CFR 122.41(i)(2)); 3. Inspect and photograph, at reasonable times, any facilities, equipment (including monitoring and control equipment), practices, or operations regulated or required under this Order (40 CFR 122.41(i)(3)); and 4. Sample or monitor, at reasonable times, for the purposes of assuring Order compliance or as otherwise authorized by the CWA or the Water Code, any substances or parameters at any location. (40 CFR 122.41(i)(4).) G. Bypass 1. Definitions "Bypass" means the intentional diversion of waste streams from any portion of a treatment facility. (40 CFR 122.41(m)(1)(i).) "Severe property damage" means substantial physical damage to property, damage to the treatment facilities, which causes them to become inoperable, or substantial and permanent loss of natural resources that can reasonably be expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused by delays in production. (40 CFR 122.41(m)(1)(ii).) 2. Bypass not exceeding limitations. The Discharger may allow any bypass to occur which does not cause exceedances of effluent limitations, but only if it is for essential maintenance to assure efficient operation. These bypasses are not subject to the provisions listed in Standard Provisions — Permit Compliance I.G.3, I.G.4, and I.G.5 below. (40 CFR 122.41(m)(2).) Attachment D Page 2 3. Prohibition of bypass. Bypass is prohibited, and the Lahontan Water Board may take enforcement action against a Discharger for bypass, unless (40 CFR 122.41(m)(4)(i)): a. Bypass was unavoidable to prevent loss of life, personal injury, or severe property damage (40 CFR 122.41(m)(4)(i)(A)); b. There were no feasible alternatives to the bypass, such as the use of auxiliary treatment facilities, retention of untreated wastes, or maintenance during normal periods of equipment downtime. This condition is not satisfied if adequate back-up equipment should have been installed in the exercise of reasonable engineering judgment to prevent a bypass that occurred during normal periods of equipment downtime or preventive maintenance (40 CFR 122.41(m)(4)(i)(B)); and c. The Discharger submitted notice to the Lahontan Water Board as required under Standard Provisions — Permit Compliance I.G.5 below. (40 CFR 122.41(m)(4)(i)(C).) 4. The Lahontan Water Board may approve an anticipated bypass, after considering its adverse effects, if the Lahontan Water Board determines that it will meet the three conditions listed in Standard Provisions — Permit Compliance I.G.3 above. (40 CFR 122.41(m)(4)(ii).) 5. Notice a. Anticipated bypass. If the Discharger knows in advance of the need for a bypass, it shall submit a notice, if possible at least 10 days before the date of the bypass. (40 CFR 122.41(m)(3)(i).) b. Unanticipated bypass. The Discharger shall submit notice of an unanticipated bypass as required in Standard Provisions - Reporting V.E below (24-hour notice). (40 CFR 122.41(m)(3)(ii).) H. Upset Upset means an exceptional incident in which there is unintentional and temporary noncompliance with technology based permit effluent limitations because of factors beyond the reasonable control of the Discharger. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or improper operation. (40 CFR 122.41(n)(1).) 1. Effect of an upset. An upset constitutes an affirmative defense to an action brought for noncompliance with such technology based permit effluent limitations if the requirements of Standard Provisions — Permit Compliance I.H.2 below are met. No determination made during administrative review of Attachment D Page 3 claims that noncompliance was caused by upset, and before an action for noncompliance, is final administrative action subject to judicial review. (40 CFR 122.41(n)(2).) 2. Conditions necessary for a demonstration of upset. A Discharger who wishes to establish the affirmative defense of upset shall demonstrate, through properly signed, contemporaneous operating logs or other relevant evidence that (40 CFR 122.41(n)(3)): a. An upset occurred and that the Discharger can identify the cause(s) of the upset (40 CFR 122.41(n)(3)(i)); b. The permitted facility was, at the time, being properly operated (40 CFR 122.41(n)(3)(ii)); c. The Discharger submitted notice of the upset as required in Standard Provisions — Reporting V.E.2.b below (24-hour notice) (40 CFR 122.41(n)(3)(iii)); and d. The Discharger complied with any remedial measures required under Standard Provisions — Permit Compliance I.0 above. (40 CFR 122.41(n)(3)(iv).) 3. Burden of proof. In any enforcement proceeding, the Discharger seeking to establish the occurrence of an upset has the burden of proof. (40 CFR 122.41(n)(4).) II. STANDARD PROVISIONS — PERMIT ACTION A. General This Order may be modified, revoked and reissued, or terminated for cause. The filing of a request by the Discharger for modification, revocation and reissuance, or termination, or a notification of planned changes or anticipated noncompliance does not stay any Order condition. (40 CFR 122.41(f).) B. Duty to Reapply If the Discharger wishes to continue an activity regulated by this Order after the expiration date of this Order, the Discharger must apply for and obtain a new permit. (40 CFR 122.41(b).) C. Transfers This Order is not transferable to any person except after notice to the Lahontan Water Board. The Lahontan Water Board may require modification or revocation and reissuance of the Order to change the name of the Discharger and Attachment D Page 4 incorporate such other requirements as may be necessary under the CWA and the Water Code. (40 CFR 122.41(1)(3); § 122.61.) III. STANDARD PROVISIONS — MONITORING A. Samples and measurements taken for the purpose of monitoring shall be representative of the monitored activity. (40 CFR 122.41(j)(1).) B. Monitoring results must be conducted according to test procedures under Part 136 or, in the case of sludge use or disposal, approved under Part 136 unless otherwise specified in Part 503 unless other test procedures have been specified in this Order. (40 CFR 122.41(j)(4); § 122.44(i)(1)(iv).) IV. STANDARD PROVISIONS — RECORDS A. Except for records of monitoring information required by this Order related to the Discharger's sewage sludge use and disposal activities, which shall be retained for a period of at least five years (or longer as required by Part 503), the Discharger shall retain records of all monitoring information, including all calibration and maintenance records and all original strip chart recordings for continuous monitoring instrumentation, copies of all reports required by this Order, and records of all data used to complete the application for this Order, for a period of at least three (3) years from the date of the sample, measurement, report or application. This period may be extended by request of the Lahontan Water Board Executive Officer at any time. (40 CFR 122.41(j)(2).) Records of monitoring information shall include: 1. The date, exact place, and time of sampling or measurements (40 CFR 122.41(j)(3)(i)); 2. The individual(s) who performed the sampling or measurements (40 CFR 122.41(j)(3)(ii)); 3. The date(s) analyses were performed (40 CFR 122.41(j)(3)(iii)); 4. The individual(s) who performed the analyses (40 CFR 122.41(j)(3)(iv)); 5. The analytical techniques or methods used (40 CFR 122.41(j)(3)(v)); and 6. The results of such analyses. (40 CFR 122.41(j)(3)(vi).) Claims of confidentiality for the following information will be denied (40 C.F.R. § 122.7(b)): 1. The name and address of any permit applicant or Discharger (40 CFR 122.7(b)(1)); and Attachment D Page 5 2. Permit applications and attachments, permits and effluent data. (40 CFR 122.7(b)(2).) V. STANDARD PROVISIONS — REPORTING A. Duty to Provide Information The Discharger shall furnish to the Lahontan Water Board, State Water Board, or USEPA within a reasonable time, any information which the Lahontan Water Board, State Water Board, or USEPA may request to determine whether cause exists for modifying, revoking and reissuing, or terminating this Order or to determine compliance with this Order. Upon request, the Discharger shall also furnish to the Lahontan Water Board, State Water Board, or USEPA copies of records required to be kept by this Order. (40 CFR 122.41(h); Wat. Code, § 13267.) B. Signatory and Certification Requirements 1. All applications, reports, or information submitted to the Lahontan Water Board, State Water Board, and/or USEPA shall be signed and certified in accordance with Standard Provisions — Reporting V.B.2, V.B.3, V.B.4, V.B.5, V.B.6, and V.B.7 below. (40 CFR 122.41(k).) 2. For a corporation, all permit applications shall be signed by a responsible corporate officer. For the purpose of this section, a responsible corporate officer means: (i) A president, secretary, treasurer, or vice-president of the corporation in charge of a principal business function, or any other person who performs similar policy- or decision-making functions for the corporation, or (ii) the manager of one or more manufacturing, production, or operating facilities, provided, the manager is authorized to make management decisions which govern the operation of the regulated facility including having the explicit or implicit duty of making major capital investment recommendations, and initiating and directing other comprehensive measures to assure long term environmental compliance with environmental laws and regulations; the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for permit application requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures. (40 CFR 122.22(a)(1).) 3. For a partnership or sole proprietorship, all permit applications shall be signed by a general partner or the proprietor, respectively. (40 CFR 122.22(a)(2).) 4. For a municipality, State, federal, or other public agency, all permit applications shall be signed by either a principal executive officer or ranking elected official. For purposes of this provision, a principal executive officer of a federal agency includes: (i) the chief executive officer of the agency, or (ii) a Attachment D Page 6 senior executive officer having responsibility for the overall operations of a principal geographic unit of the agency (e.g., Regional Administrators of USEPA). (40 CFR 122.22(a)(3).). 5. All reports required by this Order and other information requested by the Lahontan Water Board, State Water Board, or USEPA shall be signed by a person described in Standard Provisions — Reporting V.B.2, 3, or 4 above, as appropriate, or by a duly authorized representative of that person. A person is a duly authorized representative only if: a. The authorization is made in writing by a person described in Standard Provisions — Reporting V.B.2, 3, or 4 above, as appropriate (40 CFR 122.22(b)(1)); b. The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity such as the position of plant manager, operator of a well or a well field, superintendent, position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters for the company. (A duly authorized representative may thus be either a named individual or any individual occupying a named position.) (40 CFR 122.22(b)(2)); and c. The written authorization is submitted to the Lahontan Water Board and State Water Board. (40 CFR 122.22(b)(3).) 6. If an authorization under Standard Provisions — Reporting V.B.5 above is no longer accurate because a different individual or position has responsibility for the overall operation of the facility, a new authorization satisfying the requirements of Standard Provisions — Reporting V.B.5 above must be submitted to the Lahontan Water Board and State Water Board prior to or together with any reports, information, or applications, to be signed by an authorized representative. (40 CFR 122.22(c).) 7. Any person signing a document under Standard Provisions — Reporting V.B.2, 3, 4, or 5 above shall make the following certification: "I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." (40 CFR 122.22(d).) Attachment D Page 7 Monitoring Reports 1. Monitoring results shall be reported at the intervals specified in the Monitoring and Reporting Program (Attachment E) in this Order. (40 CFR 122.22(I)(4).) 2. Monitoring results must be reported on a Discharge Monitoring Report (DMR) form or forms provided or specified by the Lahontan Water Board or State Water Board for reporting results of monitoring of sludge use or disposal practices. (40 CFR 122.41(I)(4)(i).) 3. If the Discharger monitors any pollutant more frequently than required by this Order using test procedures approved under Part 136 or, in the case of sludge use or disposal, approved under Part 136 unless otherwise specified in Part 503, or as specified in this Order, the results of this monitoring shall be included in the calculation and reporting of the data submitted in the DMR or sludge reporting form specified by the Lahontan Water Board. (40 CFR 122.41(I)(4)(ii).) 4. Calculations for all limitations, which require averaging of measurements, shall utilize an arithmetic mean unless otherwise specified in this Order. (40 CFR 122.41(I)(4)(iii).) 24-Hour Reporting 1. The Discharger shall report any noncompliance that may endanger health or the environment. Any information shall be provided orally within 24 hours from the time the Discharger becomes aware of the circumstances. A written submission shall also be provided within five (5) business days of the time the Discharger becomes aware of the circumstances. The written submission shall contain a description of the noncompliance and its cause; the period of noncompliance, including exact dates and times, and if the noncompliance has not been corrected, the anticipated time it is expected to continue; and steps taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance. (40 CFR 122.41(I)(6)(i).) 2. The following shall be included as information that must be reported within 24 hours under this paragraph (40 CFR 122.41(1)(6)(ii)): a. Any unanticipated bypass that exceeds any effluent limitation in this Order. (40 CFR 122.41(I)(6)(ii)(A).) b. Any upset that exceeds any effluent limitation in this Order. (40 CFR 122.41(I)(6)(ii)(B).) 3. The Lahontan Water Board may waive the above-required written report under this provision on a case-by-case basis if an oral report has been received within 24 hours. (40 CFR 122.41(I)(6)(iii).) Attachment D Page 8 Compliance Schedules Reports of compliance or noncompliance with, or any progress reports on, interim and final requirements contained in any compliance schedule of this Order, shall be submitted no later than 14 days following each schedule date. (40 CFR 122.41(I)(5).) Planned Changes The Discharger shall give notice to the Lahontan Water Board as soon as possible of any planned physical alterations or additions to the permitted facility. Notice is required under this provision only when (40 CFR 122.41(I)(1)): 1. The alteration or addition to a permitted facility may meet one of the criteria for determining whether a facility is a new source in section 122.29(b) (40 CFR 122.41(I)(1)(i)); or 2. The alteration or addition could significantly change the nature or increase the quantity of pollutants discharged. This notification applies to pollutants that are not subject to effluent limitations in this Order. (40 CFR 122.41(I)(1)(ii).) 3. The alteration or addition results in a significant change in the Discharger's sludge use or disposal practices, and such alteration, addition, or change may justify the application of permit conditions that are different from or absent in the existing permit, including notification of additional use or disposal sites not reported during the permit application process or not reported pursuant to an approved land application plan. (40 CFR 122.41(I)(1)(iii).) Anticipated Noncompliance The Discharger shall give advance notice to the Lahontan Water Board or State Water Board of any planned changes in the permitted facility or activity that may result in noncompliance with General Order requirements. (40 CFR 122.41(I)(2).) Other Noncompliance The Discharger shall report all instances of noncompliance not reported under Standard Provisions — Reporting V.C, V.D, and V.E above at the time monitoring reports are submitted. The reports shall contain the information listed in Standard Provision — Reporting V.E above. (40 CFR 122.41(I)(7).) Other Information When the Discharger becomes aware that it failed to submit any relevant facts in a permit application, or submitted incorrect information in a permit application or in any report to the Lahontan Water Board, State Water Board, or USEPA, the Attachment D Page 9 Discharger shall promptly submit such facts or information. (40 CFR 122.41(I)(8).) VI. STANDARD PROVISIONS — ENFORCEMENT A. The Lahontan Water Board is authorized to enforce the terms of this General Permit under several provisions of the Water Code, including, but not limited to, sections 13385, 13386, and 13387. Attachment D Page 10 ATTACHMENT E — ACTIVE TREATMENT SYSTEM (ATS) REQUIREMENTS Table 1 — Numeric Effluent Limitations, Numeric Action Levels, Test Methods, Detection Limits, and Reporting Units Parameter Test Discharge Min. Units Numeric Numeric Method Type Detection Action Effluent Limit Level Limitation < 10 NTU for EPA 0180.1 Daily Flow- and/or field Weighted For ATS Turbidity test with a discharges 1 NTU N/A Average calibrated < 20 NTU for portable instrument Any Single Sample A. Dischargers choosing to implement an Active Treatment System (ATS) on their site shall comply with all of the requirements in this Attachment. B. Dischargers shall maintain a paper copy of each ATS specification onsite in compliance with the record retention requirements in the Special Provisions of this General Permit. C. ATS Design, Operation and Submittals 1. The ATS shall be designed and approved by a Certified Professional in Erosion and Sediment Control (CPESC), a Certified Professional in Storm Water Quality (CPSWQ); a California registered civil engineer; or any other California registered engineer. 2. Dischargers shall ensure that the ATS is designed in a manner to preclude the accidental discharge of settled floc' during floc pumping or related operations. 3. Dischargers shall design outlets to dissipate energy from concentrated flows. 4. Dischargers shall install and operate an ATS by assigning a lead person (or project manager) who has either a minimum of five years construction storm 1 Floc is defined as a clump of solids formed by the chemical action in ATS systems. Attachment E Page 1 water experience or who is a licensed contractor specifically holding a California Class A Contractors license.2 5. Dischargers shall prepare an ATS Plan that combines the site-specific data and treatment system information required to safely and efficiently operate an ATS. The ATS Plan shall be electronically submitted to the State Water Board at least 14 days prior to the planned operation of the ATS and a paper copy shall be available onsite during ATS operation. At a minimum, the ATS Plan shall include: a. ATS Operation and Maintenance Manual for All Equipment. b. ATS Monitoring, Sampling & Reporting Plan, including Quality Assurance/Quality Control (QA/QC). c. ATS Health and Safety Plan. d. ATS Spill Prevention Plan. 6. The ATS shall be designed to capture and treat (within a 72-hour period) a volume equivalent to the runoff from a 10-year, 24-hour storm event using a watershed runoff coefficient of 1.0. D. Treatment — Chemical Coagulation/Flocculation 1. Jar tests shall be conducted using water samples selected to represent typical site conditions and in accordance with ASTM D2035-08 (2003). 2. Dischargers shall conduct, at a minimum, six site-specific jar tests (per polymer with one test serving as a control) for each project to determine the proper polymer and dosage levels for their ATS. 3. Single field jar tests may also be conducted during a project if conditions warrant. For example, if construction activities disturb changing types of soils, which consequently cause change in storm water and runoff characteristics. E. Residual Chemical and Toxicity Requirements 1 . Dischargers shall utilize a residual chemical test method that has a method detection limit (MDL) of 10 percent or less than the maximum allowable threshold 2 Business and Professions Code Division 3, Chapter 9, Article 4, Class A Contractor: A general engineering contractor is a contractor whose principal contracting business is in connection with fixed works requiring specialized engineering knowledge and skill. Attachment E Page 2 concentration3 (MATC) for the specific coagulant in use and for the most sensitive species of the chemical used. 2. Dischargers shall utilize a residual chemical test method that produces a result within one hour of sampling. 3. Dischargers shall have a California state certified laboratory validate the selected residual chemical test. Specifically the lab will review the test protocol, test parameters, and the detection limit of the coagulant. Dischargers shall electronically submit this documentation as part of the ATS Plan. 4. If Dischargers cannot utilize a residual chemical test method that meets the requirements above, Dischargers shall operate the ATS in Batch Treatment4 mode. 5. Dischargers planning to operate in Batch Treatment mode shall perform toxicity testing in accordance with the following: a. Dischargers shall initiate acute toxicity testing on effluent samples representing effluent from each batch prior to discharges. All bioassays shall be sent to a laboratory certified by the State Water Board Division of Drinking Water Environmental Laboratory Accreditation Program (ELAP). The required field of testing number for Whole Effluent Toxicity (WET) testing is E113. b. Acute toxicity tests shall be conducted with the following species and protocols. The methods to be used in the acute toxicity testing shall be those outlined for a 96-hour acute test in "Methods for Measuring the Acute Toxicity of Effluents and Receiving Water to Freshwater and Marine Organisms, USEPA-841-R-02-012" for Fathead minnow, Pimephales promelas (fathead minnow). Acute toxicity for Oncorhynchus mykiss (Rainbow Trout) may be used as a substitute for testing fathead minnows. c. All toxicity tests shall meet quality assurance criteria and test acceptability criteria in the most recent versions of the USEPA test method for WET testing. d. Dischargers shall electronically report all acute toxicity testing. 3 The Maximum Allowable Threshold Concentration (MATC)is the allowable concentration of residual,or dissolved, coagulant/flocculant in effluent. The MATC shall be coagulantfflocculant-specific, and based on toxicity testing conducted by an independent,third-party laboratory. A typical MATC would be: The MATC is equal to the geometric mean of the NOEC(No Observed Effect Concentration)and LOEC(Lowest Observed Effect Concentration)Acute and Chronic toxicity results for most sensitive species determined for the specific coagulant. The most sensitive species test shall be used to determine the MATC. 4 Batch Treatment mode is defined as holding or recirculating the treated water in a holding basin or tank(s)until treatment is complete or the basin or storage tank(s) is full. 5 This requirement only requires that the test be initiated prior to discharge. Attachment E Page 3 F. Filtration 1. The ATS shall include a filtration step between the coagulant treatment train and the effluent discharge. This is commonly provided by sand, bag, or cartridge filters, which are sized to capture suspended material that might pass through the clarifier tanks. 2. Differential pressure measurements shall be taken to monitor filter loading and confirm that the final filter stage is functioning properly. G. Residuals Management 1. Sediment shall be removed from the storage or treatment cells as necessary to ensure that the cells maintain their required water storage (i.e., volume) capability. 2. Handling and disposal of all solids generated during ATS operations shall be done in accordance with all local, state, and federal laws and regulations. H. ATS Instrumentation 1. The ATS shall be equipped with instrumentation that automatically measures and records effluent water quality data and flow rate. 2. The minimum data recorded shall be consistent with the Monitoring and Reporting requirements below, and shall include: a. Influent Turbidity b. Effluent Turbidity c. Influent pH d. Effluent pH e. Residual Chemical f. Effluent Flow Rate g. Effluent Flow Volume 3. Systems shall be equipped with a data recording system, such as data loggers or webserver-based systems, which records each measurement on a frequency no longer than once every 15 minutes. Attachment E Page 4 4. Cumulative flow volume shall be recorded daily. The data recording system shall have the capacity to record a minimum of seven days continuous data. 5. Instrumentation systems shall be interfaced with system control to provide auto shutoff or recirculation in the event that effluent measurements exceed turbidity or pH. 6. The system shall also assure that upon system upset, power failure, or other catastrophic event, the ATS will default to a recirculation mode or safe shut down. 7. Instrumentation (flow meters, probes, valves, streaming current detectors, controlling computers, etc.) shall be installed and maintained per manufacturer's recommendations, which shall be included in the QA/QC plan. 8. The QA/QC plan shall also specify calibration procedures and frequencies, instrument method detection limit or sensitivity verification, laboratory duplicate procedures, and other pertinent procedures. 9. The instrumentation system shall include a method for controlling coagulant dose, to prevent potential overdosing. Available technologies include flow/turbidity proportional metering, periodic jar testing and metering pump adjustment, and ionic charge measurement controlling the metering pump. I. ATS Effluent Discharge 1. ATS effluent shall comply with all provisions and prohibitions in this General Permit, specifically the NELs. 2. NELs for discharges from an ATS: a. Turbidity of all ATS discharges shall be less than 10 NTU for daily flow- weighted average of all samples and 20 NTU for any single sample. b. Residual Chemical shall be less than 10 percent of MATC6 for the most sensitive species of the chemical used. 3. If an analytical effluent sampling result is outside the range of pH NELs (i.e., is below the lower NEL for pH or exceeds the upper NEL for pH) or exceeds the turbidity NEL (as listed in Table 1), Dischargers are in violation of this General 6 The Maximum Allowable Threshold Concentration (MATC)is the allowable concentration of residual, or dissolved, coagulant/flocculant in effluent. The MATC shall be coagulant/flocculant-specific, and based on toxicity testing conducted by an independent,third-party laboratory. The MATC is equal to the geometric mean of the NOEC(No Observed Effect Concentration)and LOEC(Lowest Observed Effect Concentration)Acute and Chronic toxicity results for most sensitive species determined for the specific coagulant. The most sensitive species test shall be used to determine the MATC. Attachment E Page 5 Permit and shall electronically file the results in violation within 24 hours of obtaining the results. 4. If ATS effluent is authorized to discharge into a sanitary sewer system, Dischargers shall comply with any pre-treatment requirements applicable for that system. Dischargers shall include any specific criteria required by the municipality in the ATS Plan. 5. Compliance Storm Event: Discharges of storm water from ATS shall comply with applicable NELs (above) unless the storm event causing the discharges is determined after the fact to be equal to or larger than the Compliance Storm Event. The Compliance Storm Event for ATS discharges is the 20-year, 1-hour storm, which is equal to 1 inch of rainfall in a 1-hour period. This exemption is dependent on the submission of rain gauge data verifying the storm event is equal to or larger than the Compliance Storm. J. Operation and Maintenance Plan 1 . Each project shall have a site-specific Operation and Maintenance (O&M) Manual covering the procedures required to install, operate and maintain the ATS.7 2. The O&M Manual shall only be used in conjunction with appropriate project- specific design specifications that describe the system configuration and operating parameters. 3. The O&M Manual shall have operating manuals for specific pumps, generators, control systems, and other equipment. K. Sampling and Reporting Quality Assurance/ Quality Check (QA/QC) Plan A project-specific QA/QC Plan shall be developed for each project. The QA/QC Plan shall include at a minimum: 1. Calibration — Calibration methods and frequencies for all system and field instruments shall be specified. 2. Method Detection Limits (MDLs) — The methods for determining MDLs shall be specified for each residual coagulant measurement method. Acceptable minimum MDLs for each method, specific to individual coagulants, shall be specified. The manual is typically in a modular format covering generalized procedures for each component that is utilized in a particular system. Attachment E Page 6 3. Laboratory Duplicates — Requirements for monthly laboratory duplicates for residual coagulant analysis shall be specified. L. Personnel Training 1 . Operators shall have training specific to using an ATS and liquid coagulants for storm water discharges in California. 2. The training shall be in the form of a formal class with a certificate and requirements for testing and certificate renewal. 3. Training shall include a minimum of eight hours classroom and 32 hours field training. The course shall cover the following topics: a. Coagulation Basics —Chemistry and physical processes b. ATS System Design and Operating Principles c. ATS Control Systems d. Coagulant Selection — Jar testing, dose determination, etc. e. Aquatic Safety/Toxicity of Coagulants, proper handling and safety f. Monitoring, Sampling, and Analysis g. Reporting and Recordkeeping h. Emergency Response M. Active Treatment System (ATS) Monitoring Requirements Dischargers who deploy an ATS on their site shall conduct the following: 1. Visual Monitoring a. A designated responsible person shall be on site daily at all times during treatment operations. b. Daily on-site visual monitoring of the system for proper performance shall be conducted and recorded in the project data log. i. The log shall include the name and phone number of the person responsible for system operation and monitoring. Attachment E Page 7 ii. The log shall include documentation of the responsible person's training. 2. Operational and Compliance Monitoring a. Flow shall be continuously monitored and recorded at not greater than 15- minute intervals for total volume treated and discharged. b. Influent and effluent pH must be continuously monitored and recorded at not greater than 15-minute intervals. c. Influent and effluent turbidity (expressed in NTU) must be continuously monitored and recorded at not greater than 15-minute intervals. d. The type and amount of chemical used for pH adjustment, if any, shall be monitored and recorded. e. Dose rate of chemical used in the ATS system (expressed in mg/L) shall be monitored and reported 15-minutes after startup and every 8 hours of operation. f. Laboratory duplicates — monthly laboratory duplicates for residual coagulant analysis must be performed and records shall be maintained onsite. g. Effluent shall be monitored and recorded for residual chemical/additive levels. h. If a residual chemical/additive test does not exist and the ATS is operating in a batch treatment mode of operation refer to the toxicity monitoring requirements below. 3. Toxicity Monitoring Dischargers operating in batch treatment mode shall perform toxicity testing in accordance with the following: a. Dischargers shall initiate acute toxicity testing on effluent samples representing effluent from each batch prior to discharge.8 All bioassays shall be sent to a laboratory certified by the State Water Board Division of Drinking Water Environmental Laboratory Accreditation Program (ELAP). The required field of testing number for Whole Effluent Toxicity (WET) testing is E113. b. Acute toxicity tests shall be conducted with the following species and protocols. The methods to be used in the acute toxicity testing shall be those outlined for a 96-hour acute test in "Methods for Measuring the Acute Toxicity 8 This requirement only requires that the test be initiated prior to discharge. Attachment E Page 8 of Effluents and Receiving Water to Freshwater and Marine Organisms, USEPA-841-R-02-012" for Fathead minnow, Pimephales promelas or Rainbow trout, Oncorhynchus mykiss may be used as a substitute for fathead minnow. c. All toxicity tests shall meet quality assurance criteria and test acceptability criteria in the most recent versions of the USEPA test method for WET testing. 4. Reporting and Recordkeeping At a minimum, every 30 days a LRP representing the Discharger shall access the State Water Boards Storm Water Mulit-Application and Report Tracking system (SMARTS) and electronically upload field data from the ATS. Records must be kept for three years after the project is completed . 5. Non-compliance Reporting a. Any indications of toxicity or other violations of water quality objectives shall be reported to the appropriate regulatory agency as required by this General Permit. b. Upon any measurements that exceed water quality standards, the system operator shall immediately notify his supervisor or other responsible parties, who shall notify the Lahontan Water Board. c. If any monitoring data exceeds any applicable NEL in this General Permit, Dischargers shall electronically submit a NEL Violation Report to the State Water Board within 24 hours after the NEL exceedance has been identified. i. ATS dischargers shall certify each NEL Violation Report in accordance with the Special Provisions for Construction Activity in this General Permit. ii. ATS dischargers shall retain an electronic or paper copy of each NEL Violation Report for a minimum of three years after the date the annual report is filed. iii. ATS dischargers shall include in the NEL Violation Report: (1) The analytical method(s), method reporting unit(s), and method detection limit(s) of each analytical parameter (analytical results that are less than the method detection limit shall be reported as "less than the method detection limit"); (2) The date, place, time of sampling, visual observation (inspections), and/or measurements, including precipitation; and Attachment E Page 9 (3) A description of the current onsite BMPs, and the proposed corrective actions taken to manage the NEL exceedance. iv. Compliance Storm Event - In the event that an applicable NEL has been exceeded during a storm event equal to or larger than the Compliance Storm Event, ATS dischargers shall report the onsite rain gauge reading and nearby governmental rain gauge readings for verification. Attachment E Page 10 ATTACHMENT F - WASTE DISCHARGE PROHIBITION INFORMATION FOR ACTIVITIES IN STREAM ENVIRONMENT ZONES AND FLOODPLAINS OF THE LAKE TAHOE HYDROLOGIC UNIT To protect beneficial uses and achieve water quality objectives, the Water Quality Control Plan for the Lahontan Region (Basin Plan) contains prohibitions against waste discharges to surface waters and lands within 100-year floodplains and Stream Environment Zones (SEZs) in the Lake Tahoe Hydrologic Unit (HU). These prohibitions may apply to certain construction activities conducted in these areas. I. Waste Discharge Prohibitions and Exemptions A. Region-Wide Waste Discharge Prohibitions Chapter 4, section 4.1 of the Basin Plan specifies the following region-wide waste discharge prohibitions: 1 . The discharge of waste that causes violation of any narrative or numeric water quality objective contained in this Plan is prohibited. 2. Where any numeric or narrative water quality objective contained in this Plan is already being violated, the discharge of waste that causes further degradation or pollution is prohibited. 3. The discharge of waste that could affect the quality of waters of the state that is not authorized by the State or Regional Board through waste discharge requirements, waiver of waste discharge requirements, NPDES permit, cease and desist order, certification of water quality compliance pursuant to Clean Water Act section 401, or other appropriate regulatory mechanism is prohibited. 4. The discharge of untreated sewage, garbage, or other solid wastes into surface waters of the Region is prohibited. (For the purposes of this prohibition, "untreated sewage" is that which exceeds secondary treatment standards of the Federal Water Pollution Control Act, which are incorporated in this plan in section 4.4 under "Surface Water Disposal of Sewage Effluent.") 5. The discharge of pesticides to surface or ground waters is prohibited. B. Exemptions to Region-Wide Waste Discharge Prohibitions The Basin Plan allows exemptions to certain waste discharge prohibitions if the applicable criteria are met, as described further, below. Exemptions are generally provided on a case-by-case basis, although the Lahontan Water Board may find that certain types of discharges are exempt from certain or all applicable Attachment F Page 1 waste discharge prohibitions. Chapter 4, section 4.1 includes exemption criteria for Prohibitions 1 and 2, above, which may be applicable to construction activities within the Lahontan Region. The Basin Plan also includes exemption criteria for Prohibition 5, above; see Chapter 4.1 of the Basin Plan for more information. An exemption to Prohibition 1 or 2, above, may be granted whenever the Lahontan Water Board finds all of the following: 1. The discharge of waste will not, individually or collectively, directly or indirectly, adversely affect beneficial uses, and 2. There is no reasonable alternative to the waste discharge, and 3. All applicable and practicable control and mitigation measures have been incorporated to minimize potential adverse impacts to water quality and beneficial uses. C. Exemptions for Emergency Projects The Lahontan Water Board recognizes that emergency projects may require the discharge of waste to water as part of actions to address the emergency. Due to the exigencies of the emergency situation, normal public noticing and Lahontan Water Board action on granting prohibition exemptions may not be possible. For waste discharged as a result of emergency projects, exemptions to all prohibitions contained in the Basin Plan may be granted by the Lahontan Water Board's Executive Officer for the following projects: 1. Projects to maintain, repair, restore, demolish, or replace property or facilities damaged or destroyed as a result of a disaster in a disaster stricken area in which a state of emergency has been proclaimed by the Governor pursuant to the California Emergency Services Act, commencing with section 8550 of the Government Code. 2. Emergency repairs to publicly or privately owned service facilities necessary to maintain service essential to the public health, safety or welfare. 3. Specific actions necessary to prevent or mitigate an emergency. This does not include long-term projects undertaken for the purpose of preventing or mitigating a situation that has a low probability of occurrence in the short- term. Exemptions to all waste discharge prohibitions for emergency projects meeting the above qualifications may be granted whenever the Lahontan Water Board Executive Officer finds that a specific project meets all of the following criteria: Attachment F Page 2 1. There is no feasible alternative to the project that would comply with the Basin Plan prohibitions, and 2. All applicable control and mitigation measures that are practicable have been incorporated to D. Exempted Low Threat Discharges The Lahontan Water Board has determined that the discharges listed in Table 4.1-1 are exempt from applicable region-wide and hydrologic unit/area waste discharge prohibitions subject to all the conditions set forth below and the discharge-specific conditions in Basin Plan Table 4.1-1. 1 . For proposed discharges to surface water, the applicant must provide information supporting why discharge to land is not practicable. 2. The discharge must not adversely affect the beneficial uses of the receiving water. 3. The discharge must comply with all applicable water quality objectives. 4. Best practicable treatment or control of the discharge shall be implemented to ensure that pollution or nuisance will not occur. Table 4.1-1. Low Threat Discharges Conditionally Exempt From Waste Discharge Prohibitions Specific Conditions for Exemption: Discharge Category Conditions for Exemption Atmospheric condensate from Must not contain chemicals or materials refrigeration and air conditioning that would adversely affect water quality. systems Groundwater from foundation drains, Must not contain chemicals or materials crawl-space pumps, and footing that would adversely affect water quality. drains Water main, storage tank, fire hydrant Water discharged must consist of potable flushing water. Must use best management practices to reduce soil erosion from discharged water to a level of insignificance. Incidental runoff from landscape Must not contain fertilizers or pesticides. irrigation For recycled water used for irrigation, must discharge to land. Attachment F Page 3 Specific Conditions for Exemption Continued: Non-contact cooling water Must not contain biocides, anti-scalants or other additives. _ Aquifer or pump testing water Must not be in an area of known groundwater contamination. If discharged to surface water, the quality of the discharge must be substantially similar to the quality of the receiving water. Construction dewatering Must not be in an area of known soil or groundwater contamination where that contamination could adversely affect the discharge and/or the receiving water. Utility vault and conduit flushing and Must not contain chemicals or materials draining that would adversely affect water quality. Hydrostatic testing, maintenance, Water discharged must consist of potable repair and disinfection of potable water. Must use best management water supply pipelines practices to reduce soil erosion from discharged water to an insignificant level. Hydrostatic testing of newly Potable water must be used in the constructed pipelines, tanks, hydrostatic test. Must not contain reservoirs, etc., used for purposes chemicals or materials that would other than potable water supply (e.g., adversely affect water quality. Must use gas, oil, reclaimed water, etc.) best management practices to reduce soil erosion from discharged water to an insignificant level. Disposal of treated groundwater Treatment must remove contaminants of concern to non-detectable levels. Pier pilings (driven), except for piers Piles must be driven. Where the lakebed in Lake Tahoe in significant fish contains clayey or silty substrate, spawning habitat or in areas caissons, turbidity curtains, or other best immediately offshore of stream inlets management practices must be used to limit generated turbidity to smallest area practicable. Buoys and aids to navigation Must not contain chemicals or materials that would adversely affect water quality. Scientific instrumentation for water Must meet the general conditions for quality or resources study exemption. E. Restoration Projects Discharge Exemptions The Lahontan Water Board encourages restoration projects that are intended to reduce or mitigate existing sources of soil erosion, water pollution, or impairment of beneficial uses. For waste earthen materials discharged as a result of restoration projects, exemptions to the above prohibitions, and all other prohibitions contained in the Basin Plan, may be granted by the Lahontan Water Attachment F Page 4 Board's Executive Officer whenever a specific project meets all of the following criteria: 1 . The project will eliminate, reduce or mitigate existing sources of soil erosion, water pollution, and/or impairment of beneficial uses of water, and 2. There is no feasible alternative to the project that would comply with the Basin Plan prohibitions, and 3. All applicable and practicable control and mitigation measures have been incorporated into the project to minimize land disturbance, soil erosion, discharges of turbid water, and other potential adverse impacts to water quality and beneficial uses to the minimum necessary to complete the project. F. Lake Tahoe HU Discharge Prohibitions Chapter 5, section 5.2 of the Basin Plan specifies the following discharge prohibitions for construction activities within the Lake Tahoe HU: 1 . The discharge attributable to human activities of any waste or deleterious material to surface waters of the Lake Tahoe HU is prohibited. 2. The discharge attributable to human activities of any waste or deleterious material to land below the highwater rim of Lake Tahoe or within the 100-year floodplain of any tributary to Lake Tahoe is prohibited. 3. The discharge attributable to human activities of any waste or deleterious material to Stream Environment Zones (SEZs) in the Lake Tahoe HU is prohibited. 4. The discharge or threatened discharge attributable to new pier construction of wastes to significant spawning habitats or to areas immediately offshore of stream inlets in Lake Tahoe is prohibited. 5. The discharge of garbage or other solid waste to lands within the Lake Tahoe Basin is prohibited. 6. The discharge of industrial waste within the Lake Tahoe Basin is prohibited. Industrial waste is defined as any waste resulting from any process or activity of manufacturing or construction. Stormwater discharges from industrial facilities are not prohibited when wastes in the discharge are controlled through the application of management practices or other means and the discharge does not cause a violation of water quality objectives. Attachment F Page 5 G. Exemptions to Lake Tahoe HU Prohibitions The following criteria for prohibition exemptions for the Lake Tahoe HU are set forth in Chapter 5, section 5.2 of the Basin Plan. 1. An exemption to Prohibition 1 may be granted whenever the Lahontan Water Board finds all of the following: a. The discharge of waste will not, individually or collectively, directly or indirectly, adversely affect beneficial uses, and b. There is no reasonable alternative to the waste discharge, and c. All applicable and practicable control and mitigation measures have been incorporated to minimize potential adverse impacts to water quality and beneficial uses. 2. The Lahontan Water Board may grant exemptions to Prohibitions 2, 3 and 4, above, for projects relocating existing structures below the highwater rim of Lake Tahoe, within the 100-year floodplain, within an SEZ, in spawning habitat or offshore of stream inlets to Lake Tahoe where the area of the structure is relocated on the same parcel or within a defined project area and where the following finding can be made (a "project area" may include multiple adjacent or non-adjacent parcels): The relocation must result in net or equal water quality benefit. Net or equal benefit is defined as an improvement in or maintenance of function of the associated area below the highwater rim of Lake Tahoe, 100-year floodplain, SEZ, spawning habitat, or stream inlet. Net or equal benefit may include, but is not limited to, one or more of the following: a. Relocation of structure to an area further away from the stream channel or wetlands; b. Protection of restored 100-year floodplain or SEZ or an equivalent area (at a 1:1 ratio for floodplain or 1.5:1 for SEZ) of offsite 100-year floodplain or SEZ through deed restriction or conveyance to a mitigation bank or land conservancy or similar. For projects involving disturbance of wetlands, offsite mitigation may involve larger mitigation ratios; c. For projects involving the relocation of more than 1000 square feet of impervious coverage within a 100-year floodplain or SEZ, a finding, based on a report prepared by a qualified professional, that the relocation will improve the functioning of the floodplain or SEZ and will not negatively affect the quality of existing habitats. Attachment F Page 6 d. For pier relocation projects in spawning habitat, a finding that equivalent or greater area of spawning habitat is restored or created. 3. The Regional Board may also grant exemptions to Prohibitions 2 and 3, above, under the following circumstances: a. For erosion control projects, habitat restoration projects, wetland rehabilitation projects, SEZ restoration projects, and similar projects, programs, and facilities, if all of the following findings can be made: i. There is no reasonable alternative, including relocation, that avoids or reduces the extent of encroachment below the highwater rim of Lake Tahoe, within the 100-year floodplain, or within the SEZ; and ii. Impacts are fully mitigated. b. For public outdoor recreation facilities or private piers if all of the following findings can be made: i. The project by its nature must be sited below the high water rim of Lake Tahoe, within the 100-year floodplain, or within the SEZ; ii. There is no feasible alternative that would reduce the extent of encroachment below the highwater rim of Lake Tahoe, within the 100- year floodplain, or within the SEZ; iii. Impacts are fully mitigated; iv. SEZs are restored in an amount 1.5 times the area of SEZ disturbed or developed for the project; and v. Wetlands are restored in an amount at least 1.5 times the area of wetland disturbed or developed. Certain wetland areas may require restoration of greater than 1.5 times the area disturbed or developed. c. For public service facilities if all of the following findings can be made: i. The project is necessary for public health, safety or environmental protection; ii. There is no reasonable alternative, including spans, that avoids or reduces the extent of encroachment; iii. The impacts are fully mitigated; Attachment F Page 7 iv. SEZ lands are restored in an amount 1 .5 times the area of SEZ developed or disturbed by the project; and v. Wetlands are restored in an amount at least 1.5 times the area of wetland disturbed or developed. Certain wetlands may require restoration of greater than 1.5 times the area disturbed or developed. d. For projects that require access across SEZs or 100-year floodplains to otherwise buildable sites if all of the following findings can be made: i. There is no reasonable alternative that avoids or reduces the extent of encroachment within the SEZ or 100-year floodplain; ii. Impacts are fully mitigated; iii. SEZ lands are restored in an amount 1.5 times the area of SEZ disturbed or developed by the project; and iv. Wetlands are restored in an amount at least 1.5 times the area of wetland disturbed or developed by the project. Certain wetland areas may require restoration of greater than 1 .5 times the area disturbed or developed. e. For repair or replacement of existing structures, provided that the repair or replacement does not involve the loss of additional lake habitat, or SEZ or floodplain function. Prior to granting any such exemption, the Regional Board shall require that all applicable and practicable control and mitigation measures have been incorporated into the project to minimize any discharges of wastes to surface waters during or following construction. f. Projects for monitoring or scientific research related to natural resources and environmental quality. This category includes equipment or structure installation for basic data collection, research, experimental management and resource evaluation activities that do not result in a significant adverse effect on water quality or beneficial uses. Prior to granting any such exemption, the Regional Board shall require that all applicable and practicable control and mitigation measures have been incorporated into the project to minimize any discharges of wastes to surface waters during or following construction. II. Exemption Process Dischargers seeking an exemption from a waste discharge prohibition must file project information sufficient to demonstrate that they meet the applicable criteria. Discharges subject to a prohibition cannot commence until such time as the Attachment F Page 8 Lahontan Board has provided written concurrence that the applicable criteria are met. In addition to the exemption, Dischargers must obtain all other relevant and appropriate Lahontan Water Board permits or authorizations for the project or activity (e.g., water quality certification under section 401 of the Clean Water Act). Except in emergency situations, the Lahontan Water Board Executive Officer will notify the Lahontan Water Board and interested members of the public 10 days in advance of the intent to grant an exemption to allow for public comment on whether the exemption proposal meets the applicable criteria. Such notification may be provided by electronic notification, including Internet posting. Attachment F Page 9 ATTACHMENT G - WATER QUALITY OBJECTIVES FOR CERTAIN WATER BODIES IN THE LAKE TAHOE HYDROLOGIC UNIT Table G-1. WQOs for Water Bodies in the Lake Tahoe Hydrologic Unit Surface Waters Objective (mg/L except as noted) 1,2 TDS CI SO4 B N P Fe 1 Lake Tahoe 60/65 3.0/4.0 1.0/2.0 0.01/- 0.15/- 0.008/- -- 0.30/ 0.01/ See Table 1-2 for additional 2 Fallen Leaf Lake 50/- 0.50 1.3/1.4 0.02 objectives 3 Griff Creek 80/- 0.40/- -- -- 0.19/- 0.010/- 0.03/- 4 Carnelian Bay 80/- 0.40/- -- -- 0.19/- 0.015/- 0.03/- Creek 5 Watson Creek 80/- 0.35/- -- -- 0.22/- 0.015/- 0.04/- 6 Dollar Creek 80/- 0.30/- -- -- 0.16/- 0.030/- 0.03/- 7 Burton Creek 90/- 0.30/- -- -- 0.1/6- 0.015/- 0.03/- 8 Ward Creek 70/85 0.30/ 1.4/2.8 -- 0.15/- 0.015/- 0.03/- 0.50 _ 9 Blackwood Creek 70/90 0.30/- -- -- 0.19/- 0.015/- 0.03/- 10 Madden Creek 60/- 0.10/ -- -- 0.18/- 0.015/- 0.015/- 0.20 11 McKinney Creek 55/- 0.40/ -- -- 0.19/- 0.015/- 0.03/- 0.50 12 General Creek 50/90 .5/ 0.4/0.5 -- 0.15/- 0.015/- 0.03/- 13 Meeks Creek 45/- 0.40/- -- -- 0.23/- 0.010/- 0.07/- 14 Lonely Gulch 45/- 0.30/- -- -- 0.19/- 0.015/- 0.03/- Creek 15 Eagle Creek 35/- 0.30/- -- -- 0.20/- 0.010/- 0.03/- 16 Cascade Creek 30/- 0.40/- -- -- 0.21/- 0.005/- 0.01/- 17 Tallac Creek 60/- 0.40/- -- -- 0.19/- 0.015/- 0.03/- 18 Taylor Creek 35/- 0.40/ -- -- 0.17/- 0.010/- 0.02/- 0.50 19 Upper Truckee 55/75 4.0/5.5 1.0/2.0 -- 0.19/- 0.015/- 0.03/- River 20 Trout Creek 50/60 0.15/ -- -- 0.19/- 0.015/- 0.03/- 0.20 1 Annual average value/90th percentile value. 2 Objectives are as mg/L and are defined as follows: B Boron CI Chloride SO4 Sulfate Fe Iron, Total N Nitrogen, Total P Phosphorus, Total TDS Total Dissolved Solids (Total Filterable Residues) Attachment G Page 1 Table G-2. WQOs for Fallen Leaf Lake Constituent Objective pH' 6.5 - 7.9 Temperature2 Hypolimnion -15 °C Bottom (105m) - 7.5 °C at no time shall water be increased by more than 2.8 C (5 F). Dissolved oxygen3 % saturation above 80% and DO >7 mg/L except if saturation exceeds 80% DO at bottom (105m) > 6mg/L Total nitrogen4 0.0875/0.1146/0.2107 Dissolved inorganic—N5 0.007/0.010/0.023 Total phosphorus 0.008/0.010/0.018 Soluble reactive -P 0.001 /0.002/0.009 Soluble reactive iron 0.004/0.005/0.012 Total reactive iron 0.005/0.007/0.030 Chlorophyll-a0'10 0.6/0.9/ 1.5 Clarity- Secchi depth'' -Vertical 18.5/ 16.012/ 13.613 extinction coefficient 0.146/0.154/0.17714 Phytoplankton cell counts15 219/280/450 1 0.5 units above and 0.5 units below 1991 maximum and minimum values. Also reflects stability of this constituent throughout the year. 2 Based on 1991 data. Indicates that if temperature in the hypolimnion during the summer exceeds 15 °C or if the water at 105m exceeds 7.5 °C this would constitute a significant change from existing conditions. Unless there is a anthropogenic source of thermal effluent, which does not currently exist, changes in water temperature in Fallen Leaf Lake are natural. Objectives apply at any time during the defining period. 3 Based on coldwater habitat protection and 1991 data base. The need for an objective for the bottom (105m) results from the desire to control primary productivity and deposition of organic matter on the bottom. A decline in bottom DO to below 6 mg/L would indicate a fundamental shift in the trophic state of Fallen Leaf Lake. 4 Because of the similarity between the mid-lake and nearshore sites, Fallen Leaf Lake objectives for N, P and Fe are based on the combined mid-lake 8 m and 45 m, and nearshore 8 m concentrations. Units are mg N/L, mg P/L and mg Fe/L. 5 Mean annual concentration (May- October) unless otherwise noted. 6 90th percentile value unless otherwise noted. Maximum allowable value; 1.5 times the maximum 1991 value. No single measurement should exceed this value unless otherwise noted. 8 DIN = NO3+NO2+NH4 9 Corrected for phaeophytin degradation pigments. 10 Units are i g chl-a/L. 11 Units are meters. 12 10th percentile since clarity increases with increasing Secchi depth. 13 Represents 15% loss of clarity from 10th or 90th percentile value. 14 Calculated in the photic zone between 1 m below surface to 35 m. Units are per meter. 15 Units are cells per milliliter. Attachment G Page 2 ATTACHMENT H - STORM WATER POLLUTION PREVENTION PLAN (SWPPP) CHECKLIST I. Introduction and Certifications A. SWPPP Objectives B. Permit Registration Documents C. Certification and Training Requirements D. QSP Management and Weekly Training Plan E. Contractor List F. Emergency Contact Person and 24-Hour Phone Number G. SWPPP Availability and Public Records Access H. Required Changes (Include SWPPP amendment log form in Appendices) II. Project Information A. Project Description, site address and driving directions B. WDID C. Construction and BMP Schedule D. Potential Construction Site Pollutants of Concern and Sources E. Site Location Map(s) III. Best Management Practices A. Site Management Narrative (include specs in Appendices) B. Sediment and Erosion/Stabilization Control Narrative (include specs in Appendices) C. Non-Stormwater and Material Management Narrative (include specs in Appendices) D. Spill Prevention and Response Plan E. Dewatering and Diversions Plan Narrative (include specs in Appendices) F. Active Treatment System Plan Narrative (include ATS Plan in Appendices) G. Post-Construction Stormwater Management Measures Narrative (include specs in Appendices) H. BMP and Disturbed Soil Area (DSA) Maps Attachment H Page 1 IV. BMP Inspection, Maintenance, and Rain Event Action Plans A. BMP Inspection and Maintenance Narrative (include forms and checklists in Appendices) B. Rain Event Action Plan Narrative (Include REAP template in Appendices) V. Construction Site Monitoring and Reporting Plan (CSMRP) A. Purpose B. Visual Monitoring (Inspections) C. Water Quality Sampling and Analysis D. Watershed Monitoring Option E. Quality Assurance and Quality Control F. Reporting Requirements and Records Retention G. Non-Compliance Reporting H. Annual Report I. Final Report Appendices A. SWPPP Amendment Log Form B. BMP Standard Specifications C. Dewatering and Diversion Specifications (if applicable) D. ATS Plan (if applicable) E. Visual Monitoring/BMP Inspection Forms and Checklist Templates F. Rain Event Action Plan Template Attachment H Page 2 CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD LAHONTAN REGION 2501 Lake Tahoe Boulevard,South Lake Tahoe, CA 96150 (530)542-5400• Fax(530)544-2271 http://www.waterboards.ca.gov/lahontan ORDER NO. R6T-2016-XXXX NPDES NO. CAG616002 FACT SHEET FOR GENERAL WASTE DISCHARGE REQUIREMENTS AND NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM GENERAL PERMIT FOR STORM WATER DISCHARGES ASSOCIATED WITH CONSTRUCTION ACTIVITY IN THE LAKE TAHOE HYDROLOGIC UNIT, COUNTIES OF ALPINE, EL DORADO, AND PLACER ATTACHMENT I - FACT SHEET TABLE OF CONTENTS I. PERMIT INFORMATION 1 II. CONDITIONS FOR PERMIT COVERAGE AND NOTIFICATION REQUIREMENTS 4 III. DISCHARGE PROHIBITIONS 7 IV. EFFLUENT LIMITATIONS 8 V. RECEIVING WATER LIMITATIONS 14 VI. TRAINING QUALIFICATIONS AND CERTIFICATION 14 VII. BEST MANAGEMENT PRACTICES 15 VIII. STORM WATER POLLUTION PREVENTION PLAN (SWPPP) 20 IX. MONITORING AND REPORTING PLAN REQUIREMENTS 20 X. COMPLIANCE DETERMINATION 25 Xl. PUBLIC PARTICPATION 26 Table 1. Comparison of Lake Tahoe and Statewide Construction General Permits Table 2. Key Changes to Lake Tahoe Construction General Permit Table 3. QSP/QSD Certification Criteria Attachment I - Fact Sheet I. PERMIT INFORMATION A. Regulatory Background In 1972, the Federal Water Pollution Control Act (also referred to as the Clean Water Act [CWA]) was amended to provide that the discharge of pollutants to waters of the United States from any point source is unlawful unless the discharge is in compliance with a National Pollutant Discharge Elimination System (NPDES) permit. The 1987 amendments to the CWA added section 402(p), which establishes a framework for regulating municipal and industrial storm water discharges under the NPDES Program. On November 16, 1990, the U.S. Environmental Protection Agency (USEPA) published final regulations that established storm water permit application requirements for specified categories of industries. The regulations provide that discharges of storm water to waters of the United States from construction projects that encompass five or more acres of soil disturbance are effectively prohibited unless the discharge is in compliance with an NPDES permit. Regulations (Phase II Rule) that became final on December 8, 1999, lowered the permitting threshold from five acres to one acre. Further, the NPDES permit must require implementation of Best Available Technology Economically Achievable (BAT) and Best Conventional Pollutant Control Technology (BCT) to reduce or eliminate pollutants in storm water runoff. The NPDES permit must also include additional requirements necessary to implement applicable water quality standards and general waste discharge requirements pursuant to the California Water Code (Water Code). On April 14, 2011, the California Regional Water Quality Control Board, Lahontan Region (Lahontan Water Board) adopted Order No. R6T-2011-0019 as the most recent general NPDES Construction Activity Storm Water General Permit for the Discharge of Storm Water Associated with Construction and Land Disturbing Activities in the Lake Tahoe Hydrologic Unit. This General Permit, except for enforcement purposes, supersedes Order No. R6T-2011-0019 and authorizes discharges of storm water associated with construction activity for Dischargers that agree to comply with all requirements, provisions, limitations and prohibitions in the General Permit. This General Permit regulates discharges of pollutants in storm water associated with construction activity (storm water discharges) to waters of the United States from construction sites that disturb one or more acres of land surface, or that are part of a common plan of development or sale that disturb one or more acres of land surface. Discharges of non-storm water may be necessary for the completion of certain construction projects. Such discharges include, but are not limited to, irrigation of vegetation erosion control measures, pipe flushing and testing, and construction dewatering. Such discharges are authorized by this General Permit as long as they (a) comply with the prohibitions established within the General Permit, (b) do not cause or contribute to a violation of any water quality standard, (c) do not Attachment I — Fact Sheet Page 1 violate any other provision of this General Permit, and (d) do not require a non- storm water General Permit as issued by the Lahontan Water Board. This General Permit does not preempt or supersede the authority of local storm water management agencies to prohibit, restrict, or control storm water discharges to municipal separate storm sewer systems (MS4s) or other watercourses within their jurisdiction. The terms and conditions of the Order No. R6T-2011-0019 have been automatically continued and remain in effect until the new waste discharge requirements (WDRs) and NPDES permit are adopted and become effective pursuant to this General Permit. B. Need for Lake Tahoe Hydrologic Unit Permit Although the California State Water Resources Control Board (State Water Board) regulates discharges of storm water from construction sites under a general permit applicable to the rest of the state, the Lahontan Water Board regulates construction-related storm water discharges in the Lake Tahoe Hydrologic Unit under a separate General Permit due to the sensitivity of the watershed and the characteristics of its high elevation climate. As such, some of the requirements of the Lake Tahoe permit differ from those for the rest of the state (see Table 1). Lake Tahoe is listed as impaired for transparency (clarity) due to inputs of sediment, nitrogen, and phosphorus. A total maximum daily load (TMDL) was adopted by the Lahontan Water Board and received final approval from the USEPA in August 2011. The TMDL includes a pollutant load reduction program designed to achieve the transparency objectives set for Lake Tahoe in the Water Quality Control Plan for the Lahontan Region (Basin Plan). The TMDL has identified storm water runoff from the urbanized areas as the main contributor of fine sediment that is adversely impacting Lake Tahoe transparency. Therefore, the program is partly implemented by a municipal NPDES storm water permit issued to Placer County, El Dorado County, the City of South Lake Tahoe (Board Order R6T-2011-0101), and the California Department of Transportation (Water Quality Order 2012-0011-DWQ). Construction activity in the Lake Tahoe Basin typically involves natural resource restoration, infill, and redevelopment projects. Most infill and redevelopment projects have a relatively small footprint. Development projects are tightly regulated by the Tahoe Regional Planning Agency compact and no new regional housing developments are allowed to be constructed. Construction activity has the potential to discharge sediment and other pollutants to surface waters, which impair Lake Tahoe transparency. A Lake Tahoe-specific construction general permit is needed to implement the requirements of the TMDL pollutant load reduction program and address the characteristics of the high elevation climate. This General Permit is a reissuance of the previous permit (Board Order No. Attachment I — Fact Sheet Page 2 R6T-2011-0019) and includes the following area-specific requirements that help implement the TMDL program: . Unless issued a variance, prohibits land disturbing activities from October 16 through April 30 the following year. • Requires storm water discharges that enter surface waters to meet a numeric effluent limitation of 20 nephelometric turbidity units (NTUs). • Requires post construction storm water controls to infiltrate the 20-year, 1- hour storm; meet numeric effluent limitations for sediment and nutrients contained in the Basin Plan; or meet applicable requirements set for El Dorado County, Placer County, the City of South Lake Tahoe, or the Department of Transportation to achieve pollutant load reductions established under the NPDES municipal storm water permit for these jurisdictions. C. Permit Comparison This General Permit differs in certain respects from the statewide permit established by the State Water Board to account for the sensitivity of the watershed, the high elevation climate, and the need to implement the Lake Tahoe TMDL. Differences between the statewide permit and this General Permit are summarized in Table 1. Compliance with the former Lake Tahoe permit has generally been good such that only minor changes have been made this General Permit. The most significant changes are those reflecting Basin Plan amendments for discharge prohibitions that were adopted and approved in 2014. Key changes from the previous permit are summarized in Table 2. Most Dischargers have been able to prevent runoff from leaving the project limits through the use of basins and other collection structures that are hydraulically disconnected from surface waters. Other discharges have been in areas where the runoff did not reach surface waters (e.g., infiltrated into upland forested areas). Most of the projects for which runoff samples have been collected have been related to road retrofit projects and other storm water drainage system improvements. These projects typically include replacing or reconfiguring inadequate or deteriorated drainage features that, by their nature, are hydraulically connected to surface waters. Many times these erosion features are upstream from the project areas as storm water controls are installed in a phased manner. For these projects, discharge monitoring results are similar, and at times, better than storm water flow coming on to the sites. Sites that are consistently in compliance with the visual monitoring and Best Management Practices (BMPs) maintenance requirements tend to be in compliance with the numeric effluent limitations. Based on this experience, requirements for discharge sampling during non- working days (e.g., weekends and holidays) have been eliminated while still maintaining off-day visual monitoring requirements to ensure proper Attachment I — Fact Sheet Page 3 implementation of BMPs at all times. Sampling during non-working days was determined to be ineffective as it provided little benefit, and more importantly, diverted limited resources away from ensuring BMPs were properly functioning. Experience under the previous permit identified an issue where some Qualified SWPPP Practitioners (QSPs) were working from a remote location without being present at the site to actively manage the SWPPP activities. Water Board inspections at these sites showed deficient implementation and maintenance of required BMPs. This General Permit includes new requirements to provide a written plan of how the QSP will coordinate SWPPP activities, including training and supervision of on-site personnel. II. CONDITIONS FOR PERMIT COVERAGE AND NOTIFICATION REQUIREMENTS A. Legally Responsible Person (LRP) The application requirements of the General Permit establish a mechanism to clearly identify the responsible parties, locations, and scope of operations of Dischargers covered by the General Permit and to document the Discharger's knowledge of the General Permit's requirements. To obtain coverage, the legally responsible person (LRP) or the LRP's Approved Signatory must certify and file Permit Registration Documents (PRDs) prior to the commencement of construction activity. A detailed explanation of the LRP and Approved Signatory is provided in Attachment B (Glossary) of this General Permit B. Permit Effective Date This General Permit is effective January 1, 2017. This date was chosen because it is during the period when construction activity is dormant in the Lake Tahoe Basin. It allows Dischargers to terminate their existing projects if complete or time to re-enroll in the new permit before the start of the next construction season if the project is ongoing. All Dischargers requiring coverage under this General Permit on or after January 1, 2017, must file the required PRDs and filing fee, and prior to commencing land disturbing activities, must receive an approved notice of coverage from the State Water Board indicating the date that the permit coverage begins under the General Permit and the Waste Discharge Identification (WDID) number issued for the project (see section C. below). Unless coverage is terminated sooner, Dischargers subject to Order No. R6T- 2011-0019 will continue coverage until January 1, 2017, and must comply with Order No. R6T-2011-0019 until a notice of termination for the project is processed or January 1, 2017, whichever comes first. Dischargers covered under Order No. R6T-2011-0019 that plan to continue land disturbing construction activities and permit coverage beyond December 31, 2016, must file the required PRDs and applicable filing fee to re-register in accordance with this General Permit. After December 31, 2016, Order No R6T-2011-0019 is rescinded and all coverage under Order No. R6T-2011-0019 is terminated. Attachment I — Fact Sheet Page 4 Dischargers failing to file PRDs or other information required to complete an application to renew coverage under this General Permit will lose permit coverage on January 1, 2017. C. Registration Process To obtain coverage, the LRP or Approved Signatory must file PRDs and receive notification from the State Water Board's Storm Water Multi-Application and Report Tracking System (SMARTS) that a WDID number has been issued for the project prior to the commencement of construction activity. Discharging pollutants in storm water to waters of the United States prior to obtaining coverage under this General Permit is a violation of the CWA and the Water Code. The LRP must electronically submit the PRDs, which include a Notice of Intent (NOI), Storm Water Pollution Prevention Plan (SWPPP), and other documents required by this General Permit, if applicable, and mail the appropriate filing fee to the State Water Board before starting construction activities. PRDs must be filed through SMARTS. Upon receipt of the appropriate PRDs, Lahontan Water Board staff has up to 30 days to review the documents for completeness; although, applications are typically reviewed in one to two weeks. If determined to be incomplete, a notice will be provided to the applicant with the reasons why the determination was made. Upon approval, a WDID number will be generated from SMARTS and an email notification will be sent to the applicant. D. General Permit Coverage This General Permit serves as a general NPDES permit for discharges of storm water and authorized non-storm water to surface waters associated with construction activity that results in land disturbances equal to or greater than one acre in the Lake Tahoe Hydrologic Unit, and other discharges, as follows. 1. Activities covered under this General Permit include: a. Any construction or demolition activity, including, but not limited to clearing, grading, grubbing, or excavation, or any other activity that results in land disturbance of equal to or greater than one acre. b. Construction activity that results in land surface disturbances of less than one acre if the construction activity is part of a larger common plan of development or sale that disturbs one or more acres. c. Construction activity that results in land disturbance of one or more acres related to residential, commercial, or industrial development on lands currently used for agriculture including, but not limited to, the construction of buildings related to agriculture that are considered industrial pursuant to USEPA regulations, such as dairy barns or food processing facilities. Attachment I — Fact Sheet Page 5 d. Construction activity that results in land disturbance of one or more acres associated with linear underground/overhead utility projects including, but not limited to, those activities necessary for the installation of underground and overhead linear facilities (e.g., conduits, substructures, pipelines, towers, poles, cables, wires, connectors, switching, regulating and transforming equipment and associated ancillary facilities) and include, but not limited to, underground utility mark-out, potholing, concrete and asphalt cutting and removal, trenching, excavation, boring and drilling, access road and pole/tower pad and cable/wire pull station, substation construction, substructure installation, construction of tower footings and/or welding, concrete and/or pavement repair or replacement, and stockpile/borrow locations. e. Storm water and authorized non-storm water discharges from construction activities that results in land disturbance of one or more acres associated with oil and gas exploration, production, processing, or treatment operations or transmission facilities. 2. Activities specifically not covered under this General Permit include: a. Disturbance to land of municipal facilities under an approved Storm Water Management Program for routine maintenance to maintain original line and grade, hydraulic capacity, or original purpose of the facility. b. Disturbances to land surfaces solely related to agricultural operations such as disking, harrowing, terracing and leveling, and soil preparation. c. Discharges of storm water from areas on tribal lands; construction on tribal lands is regulated by a federal permit. d. Construction activity that disturbs less than one acre of land surface, and that is not part of a larger common plan of development or the sale of one or more acres of disturbed land surface. e. Construction activity covered by an individual NPDES permit for storm water discharges. f. Discharges of storm water identified in section 402(1)(2) of the CWA, 33 USC section 1342(1)(2). E. Permit Termination Requirements To terminate coverage, Dischargers must file a Notice of Termination (NOT) request, and site photographs through SMARTS when construction is complete and final stabilization has been reached or when ownership has been transferred. The Discharger must demonstrate that the site is stabilized and does not pose any additional sediment discharge risk than the pre-construction conditions. This may be accomplished using the Revised Universal Soil Loss Attachment I — Fact Sheet Page 6 Equation (RUSLE) or RUSLE2 or other custom methods that account for the physical characteristics (soil and cover conditions) of the site. A final report describing the RUSLE modeling or custom method results and site photographs must be uploaded to SMARTS along with the NOT request. The custom method may be satisfied by providing a final report that includes a narrative of how the site was stabilized, site photographs, and a maintenance plan, if applicable, for ensuring the site remains stable after construction. The maintenance plan may include, but is not limited to, a separate ongoing maintenance contract or assignment to a maintenance division of a municipality. Dischargers must certify that all state and local requirements have been met in accordance with this General Permit and demonstrate compliance with the stabilization and post-construction standards set forth in this General Permit. Dischargers are responsible for all compliance issues including all annual fees until the NOT has been filed and approved by the Lahontan Water Board. Upon approval, a written termination notice will be transmitted to the Discharger. If revocation of coverage under the General Permit is denied, Lahontan Water Board staff shall describe the reasons for denial in a written notification. III. DISCHARGE PROHIBITIONS This General Permit implements the waste discharge prohibitions contained in the Basin Plan. Unless granted an exemption in accordance with the Basin Plan, all discharges to surface waters other than storm water and authorized non-storm water are prohibited. The Lahontan Water Board recognizes that certain non-storm water discharges may be necessary for the completion of construction projects. Authorized non-storm water discharges may include the exempted low threat discharges listed in Table 4.1-1 of Attachment F. Prior the discharging dewatering waste, the Discharger must provide a plan that ensures the activity will meet the conditions of a low threat discharge. Other exemptions to the discharge prohibitions included in the Basin Plan may be granted if the project meets the criteria specified in Attachment F of this General Permit (such as exemptions for 100-year floodplains and stream environment zones). Exemptions to these waste discharge prohibitions must be granted in writing. Non-storm water discharges may include a wide variety of sources, including improper dumping, spills, or leakage from storage tanks or transfer areas. Non- storm water discharges may contribute significant pollutant loads to receiving waters. Measures to control spills, leakage, and dumping, and to prevent illicit connections during construction must be addressed through structural and non- structural BMPs. Attachment I — Fact Sheet Page 7 IV. EFFLUENT LIMITATIONS The CWA requires point source Dischargers to control the amount of conventional, non-conventional, and toxic pollutants that are discharged into the waters of the United States. The control of pollutants discharged is established through effluent limitations and other requirements in NPDES permits. There are two principal bases for effluent limitations in the Code of Federal Regulations: 40 CFR 122.44(a) requires that permits include applicable technology-based limitations and standards; and 40 CFR 122.44(d) requires that permits include water quality-based effluent limitations (WQBELs) to attain and maintain applicable numeric and narrative water quality criteria to protect the beneficial uses of the receiving water. Section 301(b) of the CWA and implementing USEPA permit regulations at 40 CFR section 122.44 require that industrial non-municipal discharges that contain non- conventional and/or toxic pollutants regulated under the NPDES permit program comply with technology-based effluent limits. Both technology-based and WQBELs must be considered, and more stringent WQBELs must be developed if the technology-based effluent limits are not sufficient to meet water quality objectives. WQBELs for discharges authorized by this General Permit were developed to ensure protection of the beneficial uses of receiving waters in the Basin Plan. A. Technology-Based Effluent Limitations The CWA requires technology-based effluent limitations to be established based on several levels of controls: • Best practicable treatment control technology (BPT) represents the average of the best performance by plants within an industrial category or subcategory. BPT standards apply to toxic, conventional, and non- conventional pollutants. • Best available technology economically achievable (BAT) represents the best existing performance of treatment technologies that are economically achievable within an industrial point source category. BAT standards apply to toxic and non-conventional pollutants. • Best conventional pollutant control technology (BCT) represents the control from existing industrial point sources of conventional pollutants including BOD, TSS, fecal coliform, pH, and oil and grease. The BCT standard is established after considering the "cost reasonableness" of the relationship between the cost of attaining a reduction in effluent discharge and the benefits that would result, and also the cost effectiveness of additional industrial treatment beyond BPT. • New source performance standards (NSPS) represent the best available demonstrated control technology standards. The intent of NSPS Attachment I — Fact Sheet Page 8 guidelines is to set limitations that represent state-of-the-art treatment technology for new sources. The CWA requires USEPA to develop effluent limitations, guidelines and standards (ELGs) representing application of BPT, BAT, BCT, and NSPS. Section 402(a)(1) of the CWA and section 125.3 of the Code of Federal Regulations authorize the use of best professional judgment (BPJ) to derive technology-based effluent limitations on a case-by-case basis where ELGs are not available for certain industrial categories and/or pollutants of concern. Where BPJ is used, the permit writer must consider specific factors outlined in section 125.3. The USEPA published final rules with revised regulations establishing CWA technology-based effluent limitations guidelines (ELGs) and New Source Performance Standards (NSPS) for the Construction and Development (C&D) point source category; the final C&D rule became effective on May 4, 2015. 40 CFR part 450 establishes technology-based effluent limitations based on best practicable technology (BPT), best available technology (BAT), best conventional pollutant control technology (BCT), and NSPS reflecting the best available demonstrated control technology. For each of BPT, BAT, BCT, and NSPS, the ELGs establish requirements for erosion and sediment controls, soil stabilization, dewatering activities, pollution prevention measures, prohibited discharges, and outlet requirements. Additionally, a BAT numeric effluent limitation for turbidity of 280 NTUs (as a daily maximum value) was set for sites that disturb 10 acres or more of land at one time, unless storm water discharges occur as a result of a storm event in that at same day that is larger than the local 2-year, 24-hour storm. Table 5.6-1 of the Basin Plan establishes numeric effluent limitations for discharges of storm water to surface waters and municipal separate storm sewer systems, or MS4s, which are termed "collection" systems in the Basin Plan. The numeric effluent limitations contained in Table 5.6-1 are more stringent than are established in the federal ELGs. Thus, numeric effluent limitations based on Table 5.6-1 of the Basin Plan were set in Order No. R6T-2011-0019 and are continued in this General Permit as summarized below: Numeric Effluent Limitations Parameter Units Maximum Daily Effluent Limitations For Discharge To Surface Waters Total Nitrogen (as N) mg/L 0.5 Total Phosphorus (as mg/L 0.1 P) Total Iron mg/L 0.5 Turbidity NTU 20 Grease and Oil mg/L 2 Attachment I — Fact Sheet Page 9 Additionally, numeric benchmark levels for pH have been established because construction activities often involve materials, such as concrete, grout, and etching acids, which can affect the pH of runoff. The benchmark action level applies to pH levels not within the range between 6.0 and 9.0. Based on previous data collected and other anecdotal evidence, the Lahontan Water Board recognizes that pH levels in storm water runoff may fluctuate naturally depending on site characteristics. Therefore, Dischargers are required to sample for pH when site conditions have the potential to affect pH. If the results do not meet the benchmark range levels, Dischargers are required to investigate the cause of the pH excursion and implement corrective actions as needed. This action level is expected to protect receiving waters from changes in pH by more than 0.5, which is the receiving water objective for pH in the Lake Tahoe Hydrologic Unit. 1. Compliance Storm Event This General Permit contains "compliance storm event" exceptions from the technology-based turbidity NEL similar to the Statewide Construction General Permit, Order No. 2009-0009-DWQ. The rationale is that technology-based requirements are developed assuming a certain design storm (defined as the storm producing a rainfall amount for a specified BMPs capacity). Compliance thresholds are needed for storm events above and beyond the design storms assumed to determine the technology-based NELs. This General Permit establishes a compliance storm event as the equivalent rainfall in a 20-year, 1-hour storm, which is 1 inch of rainfall in a 1-hour period. This compliance storm event was chosen because it is consistent with the Basin Plan and other policies for pre- and post-construction BMP requirements. 2. Best Management Practices (BMPs) Construction activity may result in the discharge of pollutants to receiving waters through storm water runoff and additional dry weather flows. These discharges can be minimized through use of BMPs and other pollution prevention measures that reduce dry weather discharges, reduce erosion, retain sediment, and minimize contact of materials with storm water. Consistent with 40 CFR 122.44(k)(4), Order No. R6T-2011-0019 established BMPs and the requirement to develop and implement a SWPPP. This General Permit carries over the requirements to implement BMPs and a SWPPP. This General Permit also establishes requirements for a Rain Event Action Plan (REAP) to protect all exposed portions of sites with active construction activities within 24 hours prior to any likely precipitation event. The trigger for preparing a REAP is set as a 30 percent chance of 0.1 inch or more of precipitation based on the NOAA weather forecast table interface. The weather table interface may be found under the links for "Additional Forecasts and Information" for each local area forecast. The objective of the REAP Attachment I — Fact Sheet Page 10 requirement is to ensure that BMPs are properly planned, evaluated, and implemented prior to significant rain events, particularly in context of potential summer thunderstorm activity in this high elevation watershed. REAP requirements do not apply to sites where land-disturbing construction activity is suspended during the period October 16 to April 30 of the following year, under the requirement that sites must be fully winterized in accordance with the General Permit. B. Water Quality-Based Effluent Limitations (WQBELs) Section 301(b) of the CWA and section 122.44(d) require that permits include limitations more stringent than applicable federal technology-based requirements where necessary to achieve applicable water quality standards. Section 122.44(d)(1)(i) mandates that permits include effluent limitations for all pollutants that are or may be discharged at levels that have the reasonable potential to cause or contribute to an exceedance of a water quality standard, including numeric and narrative objectives within a standard. Where reasonable potential has been established for a pollutant, but there is no numeric criterion or objective for the pollutant, WQBELs must be established using: (1) USEPA criteria guidance under CWA section 304(a), supplemented where necessary by other relevant information; (2) an indicator parameter for the pollutant of concern; or (3) a calculated numeric water quality criterion, such as a proposed state criterion or policy interpreting the state's narrative criterion, supplemented with other relevant information, as provided in section 122.44(d)(1)(vi). The process for determining reasonable potential and calculating WQBELs when necessary is intended to protect the designated uses of the receiving water as specified in the Basin Plan, and achieve applicable water quality objectives and criteria that are contained in other state plans and policies. 1. Applicable Beneficial Uses and Water Quality Criteria and Objectives Beneficial uses of surface waters within the Lake Tahoe Hydrologic Unit include MUN, AGR, GWR, FRSH, REC-1, REC-2, COLD, SPWN, COMM, WILD, WQE, FLD, NAV, BIOL, RARE, and MIGR. The Basin Plan includes both narrative and numeric water quality objectives applicable to receiving waters in the Lake Tahoe Hydrologic Unit. In addition, priority pollutant water quality criteria in the California Toxic Rule (CTR) are applicable to receiving waters in the Lake Tahoe Hydrologic Unit. 2. Determining the Need for WQBELs Typical pollutants expected in discharges of storm water runoff from construction activities include nutrients, sediments, and petroleum products. As discussed above, Chapter 5.6 of the Basin Plan establishes effluent Attachment I — Fact Sheet Page 11 limitations to be implemented in storm water permits for total nitrogen, total phosphate (as total phosphorus), total iron, turbidity, and grease and oil. These parameters serve as indicator parameters to ensure water quality standards for biostimulatory substances, clarity, oil and grease, sediment, settleable materials, suspended materials, suspended sediment, transparency, and turbidity are not exceeded in the receiving water. Order No. R6T-2011-0019 established effluent limitations for total nitrogen, total phosphate (as total phosphorus), total iron, turbidity, and grease and oil based on the requirements of Chapter 5.6 of the Basin Plan. These effluent limitations have been carried over and serve as both water quality-based effluent limitations as well as technology-based effluent limitations. Table 5.1-3 (summarized in Attachment G) of the Basin Plan establishes water quality objectives for total nitrogen, total phosphorus, and total iron for some water bodies that may be more stringent than the effluent limitations established in Section 5.6 of the Basin Plan. In addition, Table 5.1-3 establishes effluent limitations for boron, chloride, sulfate, and total dissolved solids that are applicable to certain water bodies in the Lake Tahoe Hydrologic Unit. Order No. R6T-2011-0019 established the water quality objectives in Table 5.1-3 as receiving water limitations. The Lahontan Water Board found that the effluent limitations established in Section 5.6 of the Basin Plan, and receiving water limitations based on the water quality objectives established on Table 5.1-3 of the Basin Plan were protective of water quality. As such, this General Permit carries over these receiving water limitations. Due to the presence of portable sanitation devices (porta-potties), the synergistic effects of unknown pollutants in storm water runoff, and the potential presence of toxic materials at construction sites, both bacteria and toxicity are pollutants of concern. Consistent with the water quality standards established in Section 5.1 of the Basin Plan for toxicity and coliform, Order No. R6T-2011-0019 established the narrative effluent limitation: "All surface flows generated within the project area, or as a results of the development of the project, which are discharged to surface waters or municipal storm water collection systems shall not contain the following: i. Substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, or animal life; and ii. Coliform organisms attributable to human wastes." The narrative effluent limitation for toxicity and coliform organisms has been carried over. Attachment I — Fact Sheet Page 12 Section 5.6 of the Basin Plan requires storm water permits issued by the Lahontan Water Board to take into consideration the quality of run-on from offsite areas. Order No. R6T-2011-0019 required that, if pollutant concentrations of waters entering the project area exceed the numerical limitations specified above, there shall be no increase in the constituent concentrations in the waters that are discharged from the project area. Consistent with section 5.6 of the Basin Plan, this requirement has been carried over. C. Satisfaction of Anti-Backsliding Requirements Sections 402(0)(2) and 303(d)(4) of the CWA and federal regulations at 40 CFR 122.44(1) prohibit backsliding in NPDES permits. These anti-backsliding provisions require that effluent limitations in a reissued permit must be as stringent as those in the previous permit, with some exceptions in which limitations may be relaxed. The effluent limitations in this General Permit are at least as stringent as the effluent limitations in Order No. R6T-2011-0019. D. Satisfaction of Antidegradation Policy 40 CFR section 131.12 requires that the state water quality standards include an antidegradation policy consistent with the federal policy. The State Water Board established California's antidegradation policy in State Water Board Resolution No. 68-16. Resolution No. 68-16 incorporates the federal antidegradation policy where, the federal policy applies under federal law. Resolution No. 68-16 requires that existing water quality be maintained unless degradation is justified based on specific findings. The Lahontan Water Board's Basin Plan implements, and incorporates by reference, both the state and federal antidegradation policies. This General Permit is no less stringent than Order No. R6T-2011-0019 and does not extend the coverage of the General Permit beyond the types of Dischargers previously authorized to discharge under Order No. R6T-2011-0019. The Lahontan Water Board has considered antidegradation pursuant to 40 CFR 131 .12 and State Water Board Resolution No. 68-16 and finds that the subject discharges are consistent with the provisions of these policies. An antidegradation analysis is not necessary for this General Permit. Discharges not consistent with the provisions of these policies and regulations are not eligible for coverage by this General Permit. E. Stringency of Requirements for Individual Pollutants This General Permit contains both technology-based effluent limitations and WQBELs for individual pollutants. The technology-based effluent limitations consist of restrictions on total nitrogen, total phosphorus, total iron, turbidity, and grease and oil. This General Permit's technology-based pollutant restrictions implement the minimum, applicable federal technology-based requirements. Attachment I — Fact Sheet Page 13 1. All surface flows generated within the project site that discharge to surface waters or municipal storm sewer collection systems shall not contain constituents in excess of the following concentrations: Effluent Limitations Parameter Units Maximum Daily Effluent Limitations for Discharge to Surface Waters Total Nitrogen (as N) mg/L 0.5 Total Phosphorus (as P) mg/L 0.1 Total Iron mg/L 0.5 Turbidity NTU 20* Grease and Oil mg/L 2 Note* - For ATS: 10 NTU for daily flow-weighted average and 20 NTU for any single sample. 2. If constituent concentrations of waters entering the project area exceed the numerical limitations specified above, there shall be no increase in the constituent concentrations in the waters that are discharged from the project area. 3. All surface flows generated within the project area, or as a result of the development of the project that are discharged to surface waters or municipal storm water collection systems shall not contain the following: a. Substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, or animal life; and b. Coliform organisms attributable to human wastes. V. RECEIVING WATER LIMITATIONS The Basin Plan contains numeric and narrative water quality objectives applicable to all surface waters within the Lahontan Region as well as site-specific objectives for certain waters within the Lake Tahoe Hydrologic Unit. The Basin Plan also includes an objective to maintain the high quality waters pursuant to federal regulations (40 CFR 131.12) and State Water Board Resolution No. 68-16 (Anti-Degradation Policy). Surface water limitations in this General Permit are included to ensure protection of background water quality and beneficial uses of the receiving water. VI. TRAINING QUALIFICATIONS AND CERTIFICATION USEPA suggests that qualified personnel prepare SWPPPs and points to numerous states that require certified professionals to be on construction sites at all times. States that currently have certification programs are California, Washington, Georgia, Florida, Delaware, Maryland, and New Jersey. Attachment I — Fact Sheet Page 14 This General Permit requires that all SWPPPs be written, amended, and certified by a Qualified SWPPP Developer (QSD) and that a Qualified SWPPP Practitioner (QSP) is responsible for implementing the SWPPP. A QSD and/or QSP must possess one of the certifications and or registrations specified in this General Permit. Table 3 provides an overview of the criteria used in determining qualified certification titles for a QSD and QSP. VII. BEST MANAGEMENT PRACTICES Consistent with 40 CFR 122.44(k)(4), Dischargers are required to implement specific BMPs to control or abate the discharge of pollutants that are likely to be present in storm water runoff from construction sites. In addition, 40 CFR 122.45 establishes BMP requirements for erosion and sediment controls, soil stabilization, dewatering, pollution prevention measures, prohibited discharges, and surface outlets as BPT and BCT. This General Permit establishes minimum BMPs to be implemented by Dischargers, based on Order No. R6T-2011-0019, the Statewide Construction General Permit, and the requirements of 40 CFR 122.45. A. Site Management Proper handling and managing of construction materials and controlling the limits of land disturbing activities can help minimize threats to water quality. Dischargers must consider appropriate site management measures for construction materials and other potential pollutant sources, waste management, vehicle storage and maintenance, landscape materials, vehicle access routes, and construction limits. B. Sediment and Erosion Control Sediment control BMPs should be used in combination with erosion controls as a means of preventing storm water contamination. Dischargers are required to consider perimeter control measures such as installing silt fences or placing straw wattles below slopes, installing drain inlet protection, installing temporary check dams in flow lines, and constructing sediment basins to capture and treat runoff. The best way to minimize the risk of creating pollution problems during construction is to prevent erosion at the source. Dischargers are required to implement effective erosion control measures in combination with appropriate sediment control measures such as preserving existing vegetation where feasible, limiting disturbance, and stabilizing and re-vegetating disturbed areas as soon as possible after grading or construction activities. Particular attention must be paid to large, mass-graded sites where the potential for soil exposure to the erosive effects of rainfall and wind is great and where there is potential for significant sediment discharge from the site to surface waters. Until permanent vegetation is established, temporary soil stabilization is the most cost-effective Attachment I — Fact Sheet Page 15 and expeditious method to protect soil particles from detachment and transport by rainfall. Dischargers are required to consider measures such as covering disturbed areas with mulch, applying temporary seeding, and using soil stabilizers, binders, or blankets. These erosion control measures are only examples of what should be considered and should not preclude new or innovative approaches currently available or being developed. Inappropriate management of run-on and runoff can increase erosion and result in excessive physical impacts to receiving waters from sediment and increased flows. Dischargers are required to manage all run-on and runoff from a project site. Examples include installing berms, gravel bags, or other temporary run-on and runoff diversions, and providing outlet protection at discharge points. C. Non-Storm Water Management Non-storm water discharges directly connected to receiving waters or the storm drain system have the potential to negatively impact water quality and are prohibited unless a prohibition exemption is granted in writing. Dischargers must implement measures to control all non-storm water discharges to land during construction that are conditionally allowed under the terms of this General Permit. Examples include; properly washing vehicles in contained areas, controlling water applications when cleaning streets, and minimizing irrigation runoff. Control measures must be described in the SWPPP. D. Dewatering The discharge of dewatering waste to surface waters is allowed only when alternative options have been considered and deemed infeasible. When dewatering waste must be discharged to surface waters, a site-specific dewatering plan shall be prepared and accepted by Lahontan Water Board staff before the discharge may commence. The plan shall be incorporated into the project SWPPP and provided with the NOI whenever possible. The General Permit is intended to cover situations where dewatering waste may be diverted from drainages or sumps onto a portion of the project site for conveyance, treatment, retention, and/or disposal. For work or discharges in certain areas such as SEZs, a Basin Plan prohibition exemption may be required. E. Inspection, Maintenance, and Repair All management measures must be periodically inspected, maintained and repaired to ensure that receiving water quality is protected. Frequent inspections coupled with thorough documentation and timely repair are required by the General Permit. Attachment I — Fact Sheet Page 16 F. Rain Event Action Plan A Rain Event Action Plan (REAP) is a written document, specific for each rain event, that when implemented, protects all exposed portions of the site. The REAP requirement is designed to ensure that Dischargers have adequate materials, staff, and time to implement erosion and sediment control measures before the storm event occurs. A REAP shall be developed at least 24 hours before the day a forecast of 30 percent or greater probability of 0.1 inch or more of precipitation is predicted in the project area. This requirement differs from the requirements established in the Statewide Construction General Permit due to the nature of summer thunderstorms that typically occur in the Lake Tahoe Basin. Dischargers shall consult the National Oceanic and Atmospheric Administration (NOAA) website to determine the probability of predicted rain events in the project area. The website link is: http://www.srh.noaa.gov/forecast. Dischargers should be prepared to respond rapidly during periods when thunderstorm activity is predicted and monitor weather conditions for impending thunderstorms that may be localized in the project area. G. Active Treatment System (ATS1) Requirements Requirements in this General Permit for the use of an ATS is identical to the requirements established in the Statewide Construction General Permit. There are instances on construction sites where traditional erosion and sediment controls do not effectively control accelerated erosion. Under such circumstances, or under circumstances where storm water discharges leaving the site may cause or contribute to an exceedance of a water quality standard, the use of an ATS may be necessary. Additionally, it may be appropriate to use an ATS when site constraints inhibit the ability to construct a correctly sized sediment basin, when clay and/or highly erosive soils are present, or when the site has very steep or long slope lengths.2 The ATS requirements set forth in this General Permit are based on those in place for small wastewater treatment systems, ATS regulations from the Central Valley Regional Water Quality Control Board (September 2005 memorandum "2005/2006 Rainy Season - Monitoring Requirements for Storm Water Treatment Systems that Utilize Chemical Additives to Enhance Sedimentation"), the Construction Storm Water Program at the State of Washington's Department of Ecology, as well as recent advances in technology and knowledge of coagulant performance and aquatic safety. The effective design of an ATS 1 An ATS is a treatment system that employs chemical coagulation, chemical flocculation, or electrocoagulation in order to reduce turbidity caused by fine suspended sediment 2 Pitt, R., S. Clark, and D. Lake. 2006. Construction Site Erosion and Sediment Controls: Planning, Design, and Performance. DEStech Publications. Lancaster, PA. 370pp. Attachment I - Fact Sheet Page 17 requires a detailed survey and analysis of site conditions. With proper planning, ATS performance can provide exceptional water quality discharge and prevent significant impacts to surface water quality, even under extreme environmental conditions. These systems can be very effective in reducing the sediment in storm water runoff, but the systems that use additives/polymers to enhance sedimentation also pose a potential risk to water quality (e.g., operational failure, equipment failure, additive/polymer release, etc.). The State and Lahontan Water Boards are concerned about the potential acute and chronic impacts that the polymers and other chemical additives may have on fish and aquatic organisms if released in sufficient quantities or concentrations. In addition to anecdotal evidence of polymer releases causing aquatic toxicity in California, the literature supports this concern.3 For example, cationic polymers have been shown to bind with the negatively charged gills of fish, resulting in mechanical suffocation.4 Due to the potential toxicity impacts, which may be caused by the release of additives/polymers into receiving waters, this General Permit establishes residual polymer monitoring and toxicity testing requirements for discharges from construction sites that utilize an ATS. The primary treatment process in an ATS is coagulation/flocculation. ATSs operate on the principle that the added coagulant is bound to suspended sediment, forming floc, which is gravitationally settled in tanks or a basin, or removed by sand filters. A typical installation utilizes an injection pump upstream from the clarifier tank, basin, or sand filters, which is electronically metered to both flow rate and suspended solids level of the influent, assuring a constant dose. The coagulant mixes and reacts with the influent, forming a dense floc. The floc may be removed by gravitational setting in a clarifier tank or basin, or by filtration. Water from the clarifier tank, basin, or sand filters may be routed through cartridge(s) and/or bag filters for final polishing. Vendor-specific systems use various methods of dose control, sediment/floc removal, filtration, etc., that are detailed in project-specific documentation. The particular coagulant/flocculant to be used for a given project is determined based on the water chemistry of the site because the coagulants are specific in their reactions with various types of sediments. Appropriate selection of dosage must be carefully matched to the characteristics of each site. ATSs are operated in two differing modes, either Batch or Flow-Through. Batch treatment can be defined as Pump-Treat-Hold-Test-Release. In Batch treatment, water is held in a basin or tank, and is not discharged until treatment is complete. 3 RomOen, K., B. Thu, and 0. Evensen. 2002. Immersion delivery of plasmid DNA II. A study of the potentials of a chitosan based delivery system in rainbow trout (Oncorhynchus mykiss)fry. Journal of Controlled Release 85: 215-225. 4 Bullock, G., V. Blazer, S. Tsukuda, and S. Summerfelt. 2000. Toxicity of acidified chitosan for cultured rainbow trout(Oncorhynchus mykiss). Aquaculture 185:273-280. Attachment I — Fact Sheet Page 18 Batch treatment involves holding or recirculating the treated water in a holding basin or tank(s) until treatment is complete or the basin or storage tank(s) is full. In Flow-Through treatment, water is pumped into the ATS directly from the runoff collection system or storm water holding pond, where it is treated and filtered as it flows through the system, and is then directly discharged. "Flow-Through Treatment" is also referred to as Continuous treatment." 1. Effluent Standards This General Permit establishes NELs for discharges from construction sites that utilize an ATS. These systems lend themselves to NELs for turbidity and pH because of their known reliable treatment. Advanced systems have been in use in some form since the mid-1990s. ATSs are considered reliable, can consistently produce a discharge of less than 10 NTU, and have been used successfully at many sites in several states since 1995 to reduce turbidity to very low levels.5 This General Permit contains "compliance storm event" exceptions from the technology-based NELs for ATS discharges. The rationale is that technology- based requirements are developed assuming a certain design storm. For consistency with the compliance storm event for BMP performance in this General Permit, the compliance storm event for ATS use is 1 inch of rain in a 1-hour period (20-year, 1-hour storm). 2. Training Operator training is critical to the safe and efficient operation and maintenance of the ATS, and to ensure that all State Water Board monitoring and sampling requirements are met. The General Permit requires that all ATS operators have training specific to using ATS liquid coagulants. H. Post-Construction Standards Post-construction standards in this General Permit are focused on reducing fine sediment and nutrient loading to Lake Tahoe and are consistent with requirements developed under the Lake Tahoe Total Maximum Daily Load (TMDL) program. For municipal and public roadway storm water treatment facilities, each municipal jurisdiction and state highway departments must meet the requirements set forth in its respective municipal NPDES storm water permit. For new development, re-development, and existing development BMP retrofit projects, Dischargers shall consider opportunities to infiltrate stormwater runoff from impervious surfaces. At a minimum, permanent stormwater infiltration 5 Currier, B., G. Minton, R. Pitt, L. Roesner, K. Schiff, M. Stenstrom, E. Strassler, and E. Strecker. 2006. The Feasibility of Numeric Effluent Limits Applicable to Discharges of Storm Water Associated with Municipal, Industrial and Construction Activities. Attachment I — Fact Sheet Page 19 facilities must be designed and constructed to infiltrate runoff generated by the 20 year, 1-hour storm, which equates to approximately one inch of runoff over all impervious surfaces during a 1-hour period; or must meet the requirements of applicable municipal storm water permits; or must meet the alternative requirements described below. Where conditions permit, project proponents should consider designing infiltration facilities to accommodate runoff volumes in excess of the 20 year, 1-hour storm to provide additional stormwater treatment. Infiltrating runoff volumes generated by the 20-year, 1-hour storm may not be possible in some locations due to shallow depth to seasonal groundwater levels, unfavorable soil conditions, or other site constraints such as existing infrastructure or rock outcroppings. In the event that site conditions do not provide opportunities to infiltrate the runoff volume generated by a 20 year, 1- hour storm, project proponents must either (1) provide information showing how treatment facilities are expected to meet the numeric effluent limits in the Basin Plan, or (2) document written acceptance by the local municipality or state highway department that shared stormwater treatment facilities treating private property discharges and public right-of-way stormwater are sufficient to meet the municipality's average annual fine sediment and nutrient load reduction requirements. Runoff from parking lots, retail and commercial fueling stations, and other similar land uses may contain oil, grease, and other hydrocarbon pollutants. Project proponents designing treatment facilities for these areas must include pre- treatment devices to remove hydrocarbon pollutants prior to infiltration or discharge and contingency plans to prevent spills from polluting groundwater. VIII. STORM WATER POLLUTION PREVENTION PLAN (SWPPP) This General Permit establishes requirements for the development and implementation of a SWPPP to identify the sources of sediment and other pollutants that affect the quality of storm water discharges; and to describe and ensure the implementation of BMPs to minimize or eliminate sediment and other pollutants in storm water and non-storm water discharges. The conditions of SWPPP are based on previous requirements in Order No. R6T-2011-0019 and the Statewide Construction General Permit. This General Permit provides more detailed requirements for the content and organization of SWPPPs to be developed. A suggested checklist for the SWPPP is also presented in Attachment H. IX. MONITORING AND REPORTING PROGRAM REQUIREMENTS Section 122.48 requires that all NPDES permits specify requirements for recording and reporting monitoring results. Water Code sections 13267 and 13383 authorize the Lahontan Water Board to require technical and monitoring reports. The Construction Site Monitoring and Reporting Program (CSMRP), Attachment I — Fact Sheet Page 20 Attachment C of this General Permit, establishes monitoring and reporting requirements to implement federal and state requirements. The following provides the rationale for the monitoring and reporting requirements contained in the CSMRP for this facility. A. Visual Inspections To ensure the proper implementation of BMPs and the SWPPP, and record site conditions for use in compliance determination, visual inspections of the site are required each work day during active construction periods, and at least once a month during long periods of inactivity such as the winter shut-down period. Visual inspection are also required pre-, post-, and during precipitation events. Results of inspections must be documented and maintained with the project SWPPP. B. Storm Water Discharge Monitoring Pursuant to the requirements of 40 CFR 122.44(i)(2), effluent monitoring is required for all constituents with effluent limitations. Effluent monitoring is necessary to assess compliance with effluent limitations and to assess the impacts of the discharge on the receiving water. Sampling shall be conducted at all identified discharge points in accordance with the requirements of the CSMRP. The CSMRP requires daily sampling and analysis of storm water discharge events for turbidity using calibrated portable field meters to evaluate potential impacts from land-disturbing activities. This General Permit also requires that all Dischargers develop a sampling and analysis strategy for monitoring pollutants that are not visually detectable in storm water. The sampling strategy shall be developed based on the potential pollutants to be present considering the construction materials, soil amendments, soil treatments, and historic contamination at the site. Monitoring for non-visible pollutants is required at any construction site when the exposure of construction materials occurs and where a discharge can cause or contribute to an exceedance of a water quality objective. Examples of non-visible pollutants include glyphosate (herbicides), diazinon and chlorpyrifos (pesticides), nutrients (fertilizers), and molybdenum (lubricants). The use of diazinon and chlorpyrifos is a common practice among landscaping professionals and may trigger sampling and analysis requirements if these materials come into contact with storm water. High pH values from cement and gypsum, high pH and suspended sediment concentrations from wash waters, and chemical/fecal contamination from portable toilets are also potential pollutants from construction projects. The pH of effluent should be between 6.0 and 9.0 to ensure protection of water quality objectives set for receiving waters. This pH range is set as a numeric benchmark level that requires Dischargers to investigate the cause of any excursion outside of the 6.0-9.0 pH range. The Lahontan Water Board recognizes that, in some cases, pH levels in storm water runoff may occur at Attachment I — Fact Sheet Page 21 levels outside of the range due to natural conditions. In these cases, Dischargers must provide data to demonstrate that an excursion is due to natural conditions. The most effective way to avoid the sampling and analysis requirements, and to ensure permit compliance, is to avoid the exposure of construction materials to precipitation and storm water runoff by implementing appropriate BMPs. However, preventing or eliminating the exposure of pollutants at construction sites is not always possible. Some materials, such as soil amendments, are designed to be used in a manner that will result in exposure to storm water. In these cases, it is important to make sure that these materials are applied according to the manufacturer's instructions and at a time when they are unlikely to be washed away. Other construction materials can be exposed when storage, waste disposal or the application of the material is done in a manner not protective of water quality. For these situations, sampling is required unless there is capture and containment of all storm water that has been exposed. In cases where construction materials may be exposed to storm water, but the storm water is contained and is not allowed to run off the site, sampling will only be required when inspections show that the containment failed or is breached, resulting in potential exposure or discharge to receiving waters. C. Receiving Water Monitoring 1. Surface Water The storm water discharge sampling requirements and NELs in this General Permit are sufficiently stringent such that surface water (also called receiving water) monitoring is not necessary in most situations. The storm water monitoring requirements specified above provide the most direct opportunity for Dischargers to assess site conditions and take corrective actions as necessary. The stringency of the NELs also provides a sufficient enforcement mechanism to ensure that water quality is protected. Additionally, most storm water discharges are commingled with effluent from a variety of sources before discharging to surface waters. These conditions complicate analysis of the results and make it difficult to determine the cause of any potential effects on surface water quality. Therefore, this General Permit requires surface water sampling only in certain cases when stormwater discharge sampling is infeasible and there is a direct discharge to surface waters from overland flow, or during upsets that discharge to surface waters. These conditions are most often encountered on stream restoration projects where grading activities are located immediately adjacent to the surface water. In these cases, Dischargers are required to collect surface water samples up and downstream of the project site. Attachment I — Fact Sheet Page 22 2. Bioassessments This General Permit requires a bioassessment of receiving waters for Dischargers with construction projects equal to or larger than 30 acres with direct discharges into wadeable streams. Benthic macroinvertebrate samples shall be taken upstream and downstream of the site's discharge points in the receiving water. Bioassessments measure the quality of the stream by analyzing the aquatic life present. Higher levels of appropriate aquatic species tend to indicate a healthy stream; whereas low levels of organisms can indicate stream degradation. Active construction sites have the potential to discharge large amounts of sediment and pollutants into receiving waters. Requiring a bioassessment for large project sites, with the most potential to impact water quality, provides data regarding the health of the receiving water prior to the initiation of construction activities. Pre- and post-construction data can be used to compare the effects of the construction activity on the receiving water. Specific requirements of bioassessments are established in Attachment C-1 and have been developed to be consistent with the requirements of the Statewide Construction General Permit. Each ecoregion (biologically and geographically related area) in the state has a specific yearly peak time where stream biota is in a stable and abundant state. This time of year is called an Index Period and is from July 1 through August 15 in the Lake Tahoe Hydrologic Unit. The bioassessment requirements specify that benthic macroinvertebrate sampling be conducted within this index period. If pre- construction bioassessment cannot be completed within the index period, the discharger shall pay into the Surface Water Ambient Monitoring Program (SWAMP) bank account in accordance with Appendix 3 of Order No. 2009- 0009-DWQ. Bioassessment methods are required to be in accordance with the SWAMP in order to provide data consistency within the state as well as generate useable biological stream data. D. Reporting Requirements 1. 24-Hour Reporting Pursuant to the requirements of 40 CFR 122.41(1)(6), this General Permit requires Dischargers to orally report to Lahontan Water Board staff within 24 hours whenever an adverse condition occurs as a result of this discharge. An adverse condition includes, but is not limited to, a violation or threatened violation of the conditions of this General Permit, significant spills of petroleum products or toxic chemicals, or damage to control facilities that could affect compliance pursuant to section 13267(b) of the California Water Code, a written notification of the adverse condition shall be submitted to the Lahontan Water Board within five (5) business days of occurrence. The written notification shall identify the adverse conditions, describe the actions Attachment I — Fact Sheet Page 23 necessary to remedy the condition and/or the actions implemented to abate the problem from continuing, and specify a timetable, subject to the modifications of the Lahontan Water Board, for remedial actions. In the event that sampling results exceed any applicable NEL, Dischargers shall orally notify the Lahontan Water Board within 24 hours after the NEL exeedance has been identified and electronically submit all storm event sampling results through the SMARTS within five (5) business days after the NEL exceedance has been identified 2. Annual Report Dischargers must prepare and electronically submit an Annual Report no later than November 30 of each year using the module provided in SMARTS. The report shall cover the period from October 16 of the previous year through October 15 of the current year. The Annual Report must include a summary and evaluation of all sampling and analysis results, original laboratory reports, chain-of-custody forms, corrective actions taken during the compliance year, and identification of any compliance activities or corrective actions that were not implemented. 3. Final Report Dischargers shall prepare a final report following completion of project construction to demonstrate that the project is completed as planned and water quality impacts have been mitigated. Dischargers shall electronically submit the report through SMARTS. Photos of the site must be included along with a description of how the site was stabilized. The report must also describe as applicable: 1) whether the project was completed as planned in the NOI and/or any modification of the construction plans for the proposed storm water collection treatment, or disposal facilities or restoration work; 2) details of any change in the amount of impervious coverage for the project site beyond what was authorized; and 3) any significant problem(s) which occurred during project construction and remedial measures planned or implemented. 4. Restoration Monitoring and Reporting Restoration projects are often executed to improve existing water quality conditions; therefore, it is necessary to monitor restoration project effectiveness until it is self-sustaining. Monitoring information can also identify project and/or construction method strengths and weaknesses. This knowledge can provide feedback into the maintenance of the existing system and also be applied to future water quality improvement projects. This General Permit requires Dischargers to submit a detailed effectiveness monitoring plan as part of the Construction Site Monitoring and Reporting Attachment I — Fact Sheet Page 24 Program (CSMRP) that includes annual performance criteria for the review and acceptance by the Lahontan Water Board staff. A contingency plan must also be submitted for actions to be taken if performance criteria are not met. Ideally, pre- and post-construction monitoring is required to best evaluate the success of the restoration project. Monitoring should include, but not be limited to, assessments of vegetative cover and water quality and quantity measurements. Where appropriate, monitoring should also include up- gradient and down-gradient sampling of water entering a treatment method (sediment can, sand and oil trap). X. COMPLIANCE DETERMINATION This General Permit includes the following criteria on how compliance will be determined as discussed below. A. Compliance with Effluent Limitations As previously discussed under section IV — Effluent Limitations, the technology- based turbidity NEL in this General Permit is based on the performance of a BMP assuming a certain design storm (defined as the storm producing a rainfall amount). Compliance with the NELs will not be required for storm events that exceed the equivalent rainfall in a 20-year, 1-hour storm (1 inch of rainfall in a 1- hour period). Dischargers are required to provide supporting documentation (i.e., evidence of actually rainfall amount for the area, such as an on-site rain gauge and rainfall data provided by NOAA) to the Lahontan Water Board for any claims that an effluent limit exceedance occurred during a storm event exceeding a 20- year, 1-hour storm. Additionally, NELs may not apply when run-on conditions are causing an exceedance of an NEL or when discharges do not reach surface waters. Dischargers must provide data and information to support any claim that the NELs do not apply due to these circumstances. B. Multiple Sample Data The NELs in this General Permit are evaluated as a maximum daily effluent limitation (MDEL). Pursuant to NPDES regulations (40 CFR part 122.2), maximum daily discharge limitation means the highest allowable "daily discharge." Daily discharge means the "discharge or a pollutant" measured during a calendar day or any 24-hour period that reasonable represents the calendar day for purposes of sampling. For pollutants with limitations expressed in units of measurement other than mass, the daily discharge is calculated as the average measurement of the pollutant over the day. For purposes of this General Permit, the daily average effluent value is defined as the arithmetic mean of the daily effluent data. When determining compliance when more than one sample result is available due to collection at multiple discharge points Attachment I — Fact Sheet Page 25 and/or multiple times during the calendar day, Dischargers shall compute the arithmetic mean concentration for each day of discharge. Samples must be representative of the volume and quality of runoff from the site. Sample collection must not be manipulated in such a way as to skew the maximum daily effluent value. However, Dischargers may indicate the proportional area or flow from the site that each discharge point represents and factor this into the daily average for the entire site when reporting the data. C. Maximum Daily Effluent Limitation The NELs in this General Permit are evaluated as a maximum daily effluent limitation (MDEL). If a daily average concentration (or when applicable, the daily median) exceeds the MDEL for a given parameter, Dischargers will be considered out of compliance for that parameter for that one day only within the reporting period. D. Sampling by Other Parties Sampling may be conducted by persons other than the Discharger. Lahontan Water Board staff, operators of municipal separate storm sewer systems, or others may analyze storm samples. Samples collected by others may be used with other data to determine MDELs and to conduct compliance determinations, as provided above. Xl. PUBLIC PARTICIPATION The Lahontan Water Board is considering the issuance of waste discharge requirements (WDRs) that will serve as a National Pollutant Discharge Elimination System (NPDES) permit for discharges of storm water from construction-related activities. This proposed General Permit has been developed for review and comment by the public. As a step in the WDR adoption process, the Lahontan Water Board staff has developed tentative WDRs. The Lahontan Water Board encourages public participation in the WDR adoption process. A. Notification of Interested Parties On December 18, 2015, the Lahontan Water Board notified Dischargers, interested agencies, and other interested parties of its intent to prescribe waste discharge requirements for construction-related activities in the Lake Tahoe Hydrologic Unit, and provided them with an opportunity to submit their written comments and recommendations on the draft tentative permit by January 18, 2016. Notification was provided through electronic mailing and posting on the Lahontan Water Board website. Lahontan Water Board staff revised the permit based on comments received on the tentative draft, and on February 8, 2016, the Lahontan Water Board notified Dischargers, interested agencies, and other interested parties that a proposed permit was available for public review. Notification was provided through electronic mailing and posting on the Lahontan Attachment I — Fact Sheet Page 26 Water Board website. A public notice announcing the availability of the draft General Permit for review and comment was also published in Lake Tahoe area newspapers on February 5, 2016. B. Written Comments The staff determinations are proposed. Interested persons are invited to submit written comments concerning these proposed WDRs. Written comments must be submitted electronically to: Lahontan@waterboards.ca.gov with "Comments- Lake Tahoe CGP" in the subject line. To be fully considered by staff and the Lahontan Water Board, written comments must be received at the Lahontan Water Board within five days of the Public Hearing to consider adopting the updated permit. Comments received after that date will be forwarded on to the Lahontan Water Board. C. Public Workshop The Lahontan Water Board conducted a public workshop January 12, 2016, to inform and discuss issues relating to the tentative WDRs with interested parties. D. Public Hearing The Lahontan Water Board has scheduled a public meeting to consider adopting the updated permit. The Board meeting is scheduled as follows: Date: March 9-10, 2016 Time: TBD Location: 971 Silver Dollar Avenue South Lake Tahoe Interested persons are invited to attend. At the public meeting, the Lahontan Water Board will hear testimony, if any, pertinent to the discharge, WDRs, and permit. Oral testimony will be heard; however, for accuracy of the record, important testimony should be in writing. Please be aware that dates and venues may change. Our Web address is http://www.waterboards.ca.gov/lahontan/ where the public can access the current agenda for changes in dates and locations. E. Waste Discharge Requirements Petitions Any aggrieved person may petition the State Water Resources Control Board to review the decision of the Lahontan Water Board regarding the final WDRs. The petition must be submitted within 30 days of the Lahontan Water Board's action to the following address: Attachment I — Fact Sheet Page 27 State Water Resources Control Board Office of Chief Counsel P.O. Box 100, 1001 I Street Sacramento, CA 95812-0100 E. Information and Copying The tentative effluent limitations and special provisions, comments received, and other information are on file and may be inspected at the Lahontan Water Board at any time between 8:30 a.m. and 4:45 p.m., Monday through Friday, at 2501 Lake Tahoe Boulevard, South Lake Tahoe, CA 96150. Copying of documents may be arranged through the Lahontan Water Board by calling (530) 542-5400. F. Register of Interested Persons Any person interested in being placed on the mailing list for information regarding the WDRs and NPDES permit should contact the Lahontan Water Board, reference this facility, and provide a name, address, and phone number. G. Additional Information Requests for additional information or questions regarding this order should be directed to Bud Amorfini, Engineering Geologist, at 530-542-5463 or by email at Bud.amorfini@waterboards.ca.gov. Attachment I — Fact Sheet Page 28 Table 1 Comparison of Lake Tahoe CGP Requirements with State-wide CGP Requirements Requirement Description Eligible Projects State-Wide CGP includes two sets of requirements, one for conventional construction and one for linear underground/overhead (LUP) projects. The Tahoe CGP has one set of requirements for both conventional and LUP projects. There is no risk level in the Tahoe CGP. All projects are considered the same risk. Additionally, there is no option for an erosivity waiver in the Tahoe CGP. Discharge Types Both the State-Wide and Lake Tahoe CGPs cover storm water Covered and certain authorized non-storm water discharges to surface waters. Except for certain "low threat" discharges, the Lake Tahoe CGP prohibits all non-storm water waste discharges to floodplains and stream environment zones (SEZs). Exemptions may be granted for certain discharges to Stream Environment Zones (SEZs) and 100-year floodplains in accordance with Basin Plan policies presented in Attachment F of the Tahoe CGP. Permit Registration Registration is the same for both permits. Separate module for Documents (PRDs) the Tahoe CGP is established in the SMARTS (Region 6 South Lake Tahoe Permit). Legally Responsible LRP requirements are the same for both permits. Person (LRP) QSD/QSP QSD/QSP qualifications and certifications are the same for Qualifications both permits. QSD/QSP Training QSD/QSP training requirement is geared to the State-Wide and Testing CGP. State Board-sponsored training generally does not Requirements address requirements of the Tahoe CGP unless specifically added by the Trainer of Record. QSD/QSP test does not include elements of the Tahoe CGP. Numeric Effluent Discharge compliance points are the same for both permits. Limitations (NELs) However, in accordance with the Basin Plan, Tahoe CGP includes NELs for iron, nitrogen, phosphorus, oil and grease, and turbidity. Samples are required to be sampled for turbidity using portable field meters. Other constituents must be sampled in accordance with non-visible pollutant sampling requirements. The NEL for turbidity is 20 NTU and there is no numeric action level (NAL) compared with the State-Wide CGP. A daily average turbidity level must be determined in the same manner as that required in the State Board CGP. A benchmark or action level for pH is set at 6.0 to 9.0. Attachment I — Fact Sheet Page 1 Compliance Storm The compliance storm event for the Tahoe CGP is different Event than that set in the State-Wide CGP. Compliance with NELs is not required for pollutant concentrations that result from a 20- year, 1-hour storm event (1 inch of rain in a 1-hour period) or greater. This is geared toward the occurrence of summer thunderstorms, which can cause significant erosion in a short time frame during the active construction season. Supporting data including the time of sampling and the rain fall record from an on-site rain gauge or other nearby governmental agency is required for any claim of relief from the NELs. Best Management The BMP requirements are essentially the same for both Practices (BMPs) permits. The permit requires dischargers to implement appropriate BMPs from each of the following categories: 1) site management measures; 2) sediment and erosion controls; 3) dewatering controls (if applicable); 4) inspection, maintenance and repair, and 5) post-construction/LID measures. For the Tahoe CGP, land disturbing activities must cease by October 15 of each year, unless granted a variance. All projects must be winterized to prevent erosion during the period of October 16 through April 30 of the following year. For non-municipal projects, dischargers must demonstrate that post-construction controls will either infiltrate the 20-year, one- hour storm, meet numeric effluent limits in the Basin Plan, or be in compliance with municipal load reduction goals. Municipal construction projects must meet load reduction requirements set in the respective municipal NPDES permits in accordance with the Lake Tahoe TMDL. Storm Water SWPPP requirements are the same for both permits. A Pollution Prevention suggested outline for developing a SWPPP is provided in the Plan (SWPPP) Tahoe CGP. Rain Event Action The REAP trigger for the Tahoe CGP is a 30 percent chance of Plan (REAP) 0.1 inch of precipitation or more compared with a 50 percent chance in the State Board CGP. Additionally the REAP must be prepared at least 24 hours prior to predicted rain rather than 48 hours in the State Board CGP. The requirements are geared more toward thunderstorm activity in the Tahoe Basin. Construction Site Monitoring requirements in the Tahoe CGP include daily Monitoring and inspections rather than weekly in the State Board CGP. Non- Reporting Program storm water discharge inspections are included in the daily (CSMRP) routine; therefore, there are no non-storm water—specific inspections. During the winter inactive period (October 16 through April 30), monthly inspections are required. Pre-rain storm, post rain storm, and during rain storm (for extended events) are also required. Snow events do not trigger visual inspections. Attachment I — Fact Sheet Page 2 The Tahoe CGP does not include a qualifying storm event. Sampling is required whenever there is a discharge off the project boundaries. Otherwise, the scheme is the same (i.e., all discharge points must be sampled and a minimum of three samples must be collected per day). Sample analyses (turbidity and non-visibles) are the same for both permits. There is no receiving water sampling requirement in the Tahoe CGP unless specifically set for an individual site (typically for environmental restoration projects). Reporting The Tahoe CGP requires an annual report to be submitted by November 30 each year for the period of October 16 through October 15 the following year. The requirements include: 1) 24-hour reporting of an adverse condition resulting from a discharge (e.g., oil spill, unauthorized non-storm water discharge to surface waters, breach of perimeter controls, NEL violation); 2) reporting through SMARTS of all field data within 5 days (laboratory analyses within 5 days of receipt of the results; 3) annual reporting; and 4) final reporting upon project completion for NOT requests. Other Potential Biosassessment - Requirements are the same for both Requirements permits. Index period in Tahoe is July 1 through August 15. ATS — Requirements are the same for both permits, except the compliance storm event is the 20-year, 1-hour storm for the Tahoe CGP. Stream Environment Zones (SEZs)/Floodplains — The Lahontan Basin Plan contains certain prohibitions on waste discharges to SEZs and floodplains. Dischargers must identify whether their project includes non-storm water waste discharges or land disturbance to SEZs and/or floodplains in their NOI. Limited exemptions to the prohibitions may be applicable as detailed in Attachment F to the Tahoe CGP. Attachment I — Fact Sheet Page 3 Table 2 Key Changes to Lake Tahoe Construction General Permit Item Description Over winter Eliminated the over winter requirement to sample two rain sampling events. Focus is on completing visual monitoring and BMP maintenance. Sampling outside of Eliminated the requirement to collect samples outside of active active work days working/business days (e.g., holidays, weekends). The requirement to visually inspect during daylight hours on any day is still included. Visual monitoring is more effective to respond to any problems. The sampling requirement during this time diverts limited resources away from ensuring the BMPs are properly functioning. Basin Plan Updated Basin Plan prohibitions and exemptions in the CGP and Prohibitions Attachment F. Basin Plan amendments were approved in 2014. QSP management Added language to require a written Qualified Storm Water plan Practitioner (QSP) management plan to achieve better onsite management by the QSP — can't operate remotely without a communication plan that ensures active QSP oversight. Training Strengthened language to require documentation of weekly documentation training of site personnel. Receiving water Added language to clarify when receiving water sampling is sampling required. No change to existing requirements except to clarify requirements language that some stakeholders found unclear. Notice of Updated the Notice of Termination (NOT) requirements to be Termination consistent with the options included in SMARTS. This reconciles the NOT requirements with what is provided in SMARTS. Use of non- Added language to prohibit use of non-photo/biodegradable photo/biodegradable materials (such as plastic netting) in permanent Best materials Management Practices (BMPs). Attachment I — Fact Sheet Page 1 Table 3 Qualified SWPPP Developer/ Qualified SWPPP Practitioner Certification Criteria Certification/ Title Registered By QSD/QSP Certification Criteria Professional Civil 1. Approval Process Engineer California 2. Code of Ethics Both 3. Accountability 4. Pre-requisites Professional Geologist or 1. Approval Process Engineering Geologist California 2. Code of Ethics Both 3. Accountability 4. Pre-requisites 1. Approval Process Landscape Architect California 2. Code of Ethics Both 3. Accountability 4. Pre-requisites American Institute 1. Approval Process Professional Hydrologist of Hydrology 2. Code of Ethics Both 3. Accountability 4. Pre-requisites Certified Professional in 1. Approval Process Erosion and Sediment Enviro Cert 2. Code of Ethics Control TM (CPESC) International Inc. 3. Accountability Both 4. Pre-requisites 5. Continuing Education Certified Inspector of Certified Inspector 1. Approval Process Sediment and Erosion of Sediment and 2. Code of Ethics ControlTM (CISEC) Erosion Control, 3. Accountability Inc. QSP 4. Pre-requisites 5. Continuing Education Certified Erosion, 1. Approval Process Sediment and Storm Enviro Cert 2. Code of Ethics Water Inspector TM International Inc. 3. Accountability (CESSWI) QSP 4. Pre-requisites 5. Continuing Education Certified Professional in 1. Approval Process Storm Water Quality TM Enviro Cert 2. Code of Ethics (CPSWQ) International Inc. 3. Accountability Both 4. Pre-requisites 5. Continuing Education National Institute for Professional in Erosion Certification in 1. Approval Process and Sediment Control Engineering Both 2. Code of Ethics Technologies 3. Accountability (NICET) 4. Pre-requisites Attachment I - Fact Sheet Page 1 END OF DOCUMENT THIS PAGE INTENTIONALLY BLANK 2o26 Pioneer Trail Waterline Project (Rebid) 2. TRPA — Signed Project Permit 2026 Pioneer Trail Waterline Project(Rebid) TAHOE Contact Mail Location REGIONAL PO Box 5310 128 Market Street Phone: 775-588-4547 PLANNING Stateline, NV 89449-5310 Stateline, NV 89449 Fax: 775-588-4527 :� AGENCY www.trpa.gov December 23, 2024 South Tahoe Public Utility District Attn:Taylor Jaime 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 tjaime@stpud.us LINEAR PUBLIC SERVICE-SOUTH TAHOE PUBLIC UTILITY DISTRICT WATERLINE PROJECT PIONEER TRAIL BETWEEN MARSHALL TRAIL ABD SUSQUEHANA DRIVE, EL DORADO COUNTY, CALIFORNIA,ASSESSOR'S PARCEL NUMBER(APN)520-301-00,TRPA FILE NUMBER ERSP2024-1732 Dear Taylor Jaime: Enclosed please find the Tahoe Regional Planning Agency(TRPA) permit and attachments for the project referenced above. If you accept and agree to comply with the Permit conditions as stated, please make a copy of the permit,sign the"Permittee's Acceptance" block on the first page the Permit, and return the signed copy to TRPA within twenty-one (21)calendar days of issuance.Should the permittee fail to return the signed permit within twenty-one(21) calendar days of issuance,the permit will be subject to nullification. Please note that signing the permit does not of itself constitute acknowledgement of the permit, but rather acceptance of the conditions of the permit. TRPA will acknowledge the permit only after all standard and special conditions of approval have been satisfied. Please schedule an appointment with me to finalize your project or send all final document via email. Pursuant to Rule 11.2 of the TRPA Rules of Procedure,this permit may be appealed within twenty-one (21) days of the date of this correspondence. If you have any questions, please contact me by phone at(775)589-5247 or by email at iroll@trpa.gov. Sincerely, a7 Julie Roll Senior Planner Permitting&Compliance Department TAHOE Mail Location Contact REGIONAL PO Box 5310 128 Market Street Phone: 775-588-4547 PLANNING Stateline, NV 89449-5310 Stateline, NV 89449 Fax: 775-588-4527 AGENCY www.trpa.gov Permit PROJECT DESCRIPTION: New Waterline APN: 520-301-00 PERMITTEE: South Tahoe Public Utility District FILE#: ERSP2024-1732 COUNTY/LOCATION: El Dorado County/Pioneer Trail from Marshall trail to Susquehana Drive Having made the findings required by Agency ordinances and rules, TRPA approved this project on December 23,2024,subject to the standard conditions of approval attached hereto (Attachments Q) and the special conditions found in this permit. This permit shall expire on December 23,2027 without further notice unless the construction has commenced prior to this date and is diligently pursued thereafter. Commencement of construction consists of pouring concrete for a foundation and does not include grading, installation of utilities or landscaping. Diligent pursuit is defined as completion of the project within the approved construction schedule.The expiration date shall not be extended unless the project is determined by TRPA to be the subject of legal action which delayed or rendered impossible the diligent pursuit of the permit. NO DEMOLITION, CONSTRUCTION OR GRADING SHALL COMMENCE UNTIL: (1) TRPA RECEIVES A COPY OF THIS PERMIT UPON WHICH THE PERMITTEE(S) HAS ACKNOWLEDGED RECEIPT OF THE PERMIT AND ACCEPTANCE OF THE CONTENTS OF THE PERMIT; (2) ALL PRE-CONSTRUCTION CONDITIONS OF APPROVAL ARE SATISFIED AS EVIDENCED BY TRPA'S ACKNOWLEDGEMENT OF THIS PERMIT; (3) THE PERMITTEE OBTAINS APPROPRIATE COUNTY PERMIT.TRPA'S ACKNOWLEDGEMENT MAY BE NECESSARY TO OBTAIN A COUNTY PERMIT.THE COUNTY PERMIT AND THE TRPA PERMIT ARE INDEPENDENT OF EACH OTHER AND MAY HAVE DIFFERENT EXPIRATION DATES AND RULES REGARDING EXTENSIONS;AND (4) A TRPA PRE-GRADING INSPECTION HAS BEEN CONDUCTED WITH THE PROPERTY OWNER AND/OR THE CONTRACTOR. I 12/23/2024 TRPA Exe tive Director/Designee Date PERMITTEES'ACCEPTANCE: I have read the permit and the conditions of approval and understand and accept them. I also understand that I am responsible for compliance with all the conditions of the permit and am responsible for my agents'and employees'compliance with the permit conditions. I also understand that if the property is sold, I remain liable for the permit conditions until or unless the new owner acknowledges the transfer of the permit and notifies TRPA in writing of such acceptance. I also understand that certain mitigation fees associated with this permit are non-refundable once paid to TRPA. I understand that it is my sole responsibility to obtain any and all required approvals from any other state, local or federal agencies that may have jurisdiction over this project whether or not they are listed in this permit. Signature of Permittee(s) � — Date 2' S' 2C (PERMIT CONTINUED ON NEXT PAGE) APN 520-301-00 FILE NO. ERSP2024-1732 Security Posted (1):Amount$ 5.000 Posted Type Receipt No. Security Administrative Fee (2):Amount$TBD Paid Receipt No. Notes: (1) See Special Condition 3.A, below. (2) Subject to change,see TRPA filing fee for current security administrative fee. Required plans determined to be in conformance with approval: Date: TRPA ACKNOWLEDGEMENT:The Permittee has complied with all pre-construction conditions of approval as of this date and is eligible for a county building permit: TRPA Executive Director/Designee Date SPECIAL CONDITIONS 1. This permit specifically approves installation of approximately 9,000 linear feet of new 12" plastic and ductile iron waterline along Pioneer Trail as well as eight new fire hydrants.This waterline will provide a secondary feed to the Pine Valley and Susquehana zones in order to mitigate existing fire flow deficiencies and increase reliability of the system.A separate 12" plastic pipeline will be installed along Pioneer trail from Marshall Trail to Golden Bear Trail to replace an existing 10" pipeline.The total excavation associated with the project is approximately 6,451 cubic yards.All construction will occur within the El Dorado County right- of-way, and all disturbed areas will be repaved or restored upon completion of the project.The maximum depth of trenches shall not exceed 8.5 feet below ground surface, per approved soils hydro file LCAP2024-0262. No new coverage will be created.There will be no increase in capacity or change in use resulting from this project. No new sewer lines or sewer connections are included with this project. Construction staging will be at the paved District facility on Black Bart Avenue (plan sheet G3). 2. The Standard Conditions of Approval listed in Attachment Q shall apply to this permit. 3. Prior to permit acknowledgement,the following conditions of approval must be satisfied: A. The security required under Standard Condition A.3 of Attachment Q shall be$5,000.00. Please see Attachment J,Security Procedures,for appropriate methods of posting the security and for calculation of the required security administration fee. B. If any staging areas are proposed other than the paved facility on Black Bart Avenue,the Permittee shall submit a map showing locations of all proposed construction staging areas and associated construction BMPs. If any staging is proposed off paved areas, a restoration plan must also be submitted. C. The permittee shall submit a construction schedule prior to commencement of construction. D. Submit a dewatering plan for review. 4. No staging areas may be used without prior approval from the TRPA Compliance Inspector. Vehicles must be parked on paved surfaces or existing compacted road shoulders. 5. All barren areas and areas disturbed by construction shall be revegetated in accordance with the TRPA Handbook of Best Management Practices.Application of mulch may enhance vegetative establishment. 7. If groundwater is encountered during excavation, dewatering shall occur in accordance with the approved dewatering plan. 8. Drop inlets and storm water conveyance and treatment facilities located downslope of excavated material shall be protected by using drop inlet inserts or fiber rolls. 9. Dust control in the way of sweeping of dirt tracked onto pavement at the end of each day is required where necessary. 10. Temporary and permanent BMPs may be field fit by the TRPA Compliance Inspector where appropriate. 11. Any normal construction activities creating noise in excess to the TRPA noise standards shall be considered exempt from said standards provided all such work is conducted between the hours of 8:00 A.M. and 6:30 P.M. 12. This approval is based on the permittee's representation that all plans and information contained in the subject application are true and correct.Should any information or representation submitted in connection with the project application be incorrect or untrue, TRPA may rescind this approval, or take other appropriate action. 13 To the maximum extent allowable by law,the Permittee agrees to indemnify, defend, and hold harmless TRPA, its Governing Board including individual members, its Planning Commission including individual members, its agents, and its employees (collectively,TRPA)from and against any and all suits, losses, damages, injuries, liabilities, and claims by any person (a)for any injury (including death) or damage to person or property or(b)to set aside, attack,void, modify, amend, or annul any actions of TRPA. The foregoing indemnity obligation applies, without limitation,to any and all suits, losses,damages, injuries, liabilities, and claims by any person from any cause whatsoever arising out of or in connection with either directly or indirectly, and in whole or in part(1)the processing, conditioning, issuance, administrative appeal,or implementation of this permit; (2) any failure to comply with all applicable laws and regulations; or(3)the design, installation,or operation of any improvements, regardless of whether the actions or omissions are alleged to be caused by TRPA or Permittee. Included within the Permittee's indemnity obligation set forth herein,the Permittee agrees to pay all fees of TRPA's attorneys and all other costs and expenses of defenses as they are incurred, including reimbursement of TRPA as necessary for any and all costs and/or fees incurred by TRPA for actions arising directly or indirectly from issuance or implementation of this permit. TRPA will have sole and exclusive control (including the right to be represented by attorneys of TRPA's choosing)over the defense of any claims against TRPA and over their settlement,compromise or other disposition. Permittee shall also pay all costs, including attorneys'fees, incurred by TRPA to enforce this indemnification agreement. If any judgment is rendered against TRPA in any action subject to this indemnification,the Permittee shall,at its expense,satisfy and discharge the same. 14. This site shall be winterized in accordance with the provisions of Attachment R by October 15th of each construction season. 15. All waste resulting from the saw-cutting of pavement shall be removed using a vacuum (or other TRPA approved method) during the cutting process or immediately thereafter. Discharge of waste material to surface drainage features is prohibited and constitutes a violation of this permit. 16. Any excess spoil material from excavation work shall be removed from the project area and disposed of at a site approved by the TRPA Compliance Inspector. END OF PERMIT FINDINGS OF NO SIGNIFICANT EFFECT PROJECT DESCRIPTION: Linear Public Service/Waterline APN: 520-301-00 PERMITTEE: South Tahoe Public Utility District FILE#: ERSP2024-1732 COUNTY/LOCATION: El Dorado County, Pioneer Trail (Marshall Trail to Susquehaha Dr.) Staff Analysis: In accordance with Article IV of the Tahoe Regional Planning Compact,as amended, and Section 6.3 of the TRPA Rules and Regulations of Practice and Procedure,the TRPA staff has reviewed the information submitted with the subject project. On the basis of this initial environmental evaluation, Agency staff has found that the subject project will not have a significant effect on the environment. Determination: Based on the above-stated finding,the subject project is conditionally exempt from the requirement to prepare an Environmental Impact Statement.The conditions of this exemption are the conditions of permit approval. I,JA 12/23/24 TRPA'Chairman or Executive Director Date END OF DOCUMENT THIS PAGE INTENTIONALLY BLANK 2o26 Pioneer Trail Waterline Project (Rebid) 3. USFS Special Use Permit Amendment — Signed 2026 Pioneer Trail Waterline Project(Rebid) Auth ID: ELD400821 FS-2700-23 (09/2020) Contact Name: SOUTH TAHOE PUBLIC UTILITY DISTRICT OMB No. 0596-0082 Use Code: 362, 935, 914, 915, 931, 753 U.S. DEPARTMENT OF AGRICULTURE FOREST SERVICE AMENDMENT FOR SPECIAL USE AUTHORIZATION NUMBER 2 This amendment is attached to and made a part of special use authorization for water transmission lines, ELD400821, issued to SOUTH TAHOE PUBLIC UTILITY DISTRICT on 04/28/2015, which is hereby amended as follows: • Installation, operation and maintenance of water system improvements along Pioneer Trail, which is under permit to El Dorado County. Specifically, the project includes: o Installation of 11,300 linear feet of 16-inch waterline from Marshall Trail to Susquehana Drive o Installation of nine fire hydrants o Replacement of three pressure regulating stations along Pioneer Trail o Use of three staging areas in existing roadside pullouts o Authorization of 11,300 ft x 10 ft of permanent access to waterline, plus 8,800 square feet of temporary staging, totaling 2.8 acres of disturbance • Construction will take place on National Forest System land,APN 080-030-002, 080- 050-002, 080-050-014, as shown in attachment, Exhibit A; and • Full design plans are in the STPUD project file; a sample is shown in Exhibit B This Amendment is accepted subject to all its terms, including any attachments. *414 Chris Stanley Dionne Uzes Field Operations M. !:er Acting Forest Supervisor South Tahoe Public Utility District USDA Forest Service Lake Tahoe Basin Management Unit ki/Ja- 4/15/2026 Date Date Authorization ID: ELD400821,Amendment#2 According to the Paperwork Reduction Act of 1995, an agency may not conduct or sponsor,and a person is not required to respond to a collection of information unless it displays a valid OMB control number. The valid OMB control number for this information collection is 0596-0082. Response to this collection of information is mandatory. The authority to collect the information is the Organic Administration Act, 16 U.S.C. 551. The time required to complete this information collection is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. In accordance with Federal civil rights law and U.S. Department of Agriculture(USDA) civil rights regulations and policies,the USDA, its Agencies, offices, and employees, and institutions participating in or administering USDA programs are prohibited from discriminating based on race, color,national origin, religion, sex, disability, age,marital status, family/parental status, income derived from a public assistance program,political beliefs,or reprisal or retaliation for prior civil rights activity,in any program or activity conducted or funded by USDA(not all bases apply to all programs). Remedies and complaint filing deadlines vary by program or incident. Persons with disabilities who require alternative means of communication for program information(e.g., Braille, large print, audiotape,American Sign Language, etc.) should contact the State or Local agency that administers the program or USDA through the Telecommunication Relay Service at 711 (voice or TTY).Additionally,program information may be made available in languages other than English. To file a program discrimination complaint,complete the USDA Program Discrimination Complaint Form,AD-3027,found online at How to File a Program Discrimination Complaint and at any USDA office or write a letter addressed to USDA and provide in the letter all of the information requested in the form. To request a copy of the complaint form, call(866) 632-9992. Submit your completed form or letter to USDA by: (1)mail: U.S.Department of Agriculture, Office of the Assistant Secretary for Civil Rights, 1400 Independence Avenue, SW, Mail Stop 9410,Washington,D.C. 20250-9410; (2)fax: (202) 690- 7442; or(3)email: program.intake@usda.gov. USDA is an equal opportunity provider,employer, and lender. The Privacy Act of 1974(5 U.S.C. 552a)and the Freedom of Information Act(5 U.S.C. 552)govern the confidentiality to be provided for information received by the Forest Service. Page 2of11 Authorization ID: ELD400821,Amendment#2 U.S. DEPARTMENT OF AGRICULTURE FOREST SERVICE AMENDMENT FOR SPECIAL USE AUTHORIZATION NUMBER 2 CONDITIONS CONDITION#1, Botany: 1. Inventory a) As part of site-specific planning,project areas and adjacent areas (particularly access roads)will be inventoried for invasive plants. Since implementation will begin before flowering periods,past survey findings will be utilized, until new survey data is available. b) Any additional infestation discovered prior to or during project implementation should be flagged and avoided, then reported to the permit administrator for prioritization and assessment for treatment. 2. Known Invasive Plant Infestations - invasive plant infestations will be flagged and avoided by STPUD biologist (see map). Equipment and soil-disturbing project activities must be excluded from these areas. If not avoidable, all equipment and vehicles must be cleaned following equipment cleaning guidelines before moving to another location. 3. Equipment Cleaning a) All equipment and vehicles used for project implementation must be free of invasive plant material before moving into the project area. Equipment will be considered clean when visual inspection does not reveal soil, seeds, plant material or other such debris. Cleaning shall occur at a vehicle washing station or steam-cleaning facility before the equipment and vehicles enter the project area. b) When working in known invasive plant infestations or designated weed units, equipment shall be cleaned before moving to other National Forest Service system lands. These areas will be identified on project maps. c) Vehicles and other equipment that do not move directly from the National Forest System lands to the LTBMU must be washed to remove all plant material. When working in known invasive plant infestations, equipment shall be cleaned before moving to other National Forest System lands. 4. Staging areas - Do not stage equipment, materials, or crews in invasive plant-infested areas. 5. Control Areas -Where feasible, invasive plant infestations will be designated as Control Areas -Areas where equipment traffic and soil-disturbing project activities would be excluded. Where control areas cannot be avoided, treatments, equipment washing, revegetation, and surveillance monitoring will be implemented to minimize spread from project implementation. If Control Areas are designated, they will be identified on project maps and delineated in the field with flagging. 6. Project-related disturbance - Minimize the amount of ground and vegetation disturbance in staging and construction areas. Where feasible, reestablish vegetation on disturbed bare Page 3 of 11 Authorization ID: ELD400821,Amendment#2 ground to reduce invasive species establishment; revegetation is especially important in staging areas. 7. Early Detection-Any additional infestation discovered prior to or during project implementation should be reported to the Forest Botanist or their designated appointee for prioritization and assessment for treatment. 8. Post Project Monitoring -After the project is completed the project area must be monitored for invasive plants. Monitoring cost recovery fees will be collected if the Forest Service will do this work. 9. Gravel, fill, and other materials -All gravel, fill, or other materials are required to be weed-free. Use onsite sand, gravel, rock, or organic matter when possible. Otherwise, obtain weed-free materials from sources that have been certified as weed-free. If an LTBMU inspector is not available to inspect material source, then the project proponent will provide a weed-free certificate for its material source. a) Mulch and topsoil -Use weed-free mulches and topsoil. Salvage topsoil from project area for use in onsite revegetation, unless contaminated with invasive species. Do not use material (or soil) from areas contaminated by cheatgrass. b) Erosion control materials—Wattles, blankets, and other BMP materials would be composed of certified weed free excelsior or coir mechanically bound in all-natural fiber nettings or socks (no straw or plastic/photodegradable netting is authorized). Erosion control materials would be protected from weather and/or handling damage prior to installation. 10. Revegetation a) Reestablish vegetation on disturbed bare ground that would not otherwise return to pre-project native plant cover condition within 3 years to reduce invasive species establishment; revegetation is especially important in staging areas. b) Seed and plant mixes must be approved by the Forest Service. c) Non-native invasive species will not be intentionally used in revegetation. Seed would not be accepted until USFS has approved seed analysis results, which must include weed testing for all State noxious weeds and follow AOSCA protocols for necessary sample sizes. The weed seed percentage in the seed lot would not exceed 0.02 or otherwise approved by the USFS. d) Persistent non-natives, such as timothy(Phleum pretense), orchardgrass (Dactylis glomerata), ryegrass (Lolium spp.), or crested wheatgrass (Agropyron cristatum) will not be used in revegetation. e) Seed and plant material will be from native, high-elevation sources in the Sierra Nevada as much as possible. Plant and seed material should be collected from as close to the project area as possible, from within the same watershed, and at a similar elevation whenever possible. CONDITION#2,Wildlife: If vegetation removal is planned May-September, a qualified biologist must survey for nesting birds and bat roosts. If nests or roosts are found, they must be reported to the Forest Service wildlife biologist and removal should be delayed until the nest or roost can be confirmed unoccupied. These surveys will also be needed if vehicles and equipment will be going over bushes and other nesting habitats. The nest survey includes all migratory birds. Both bird and bat Page 4 of 11 Authorization ID: ELD400821,Amendment#2 roosts surveys must be conducted no more than 14 days, but preferably 3-5 days prior to implementation. CONDITION#3: Provide a final copy of design plans prior to project implementation. CONDITION#4:A separate Forest Service permit is required prior to tree removal. CONDITION#5: Based on consultation with the Tribal Historic Preservation Office of the Washoe Tribe of Nevada and California, a Washoe Tribal Monitor is requested onsite during the project. Coordinate directly with the Washoe Tribe and Forest Service Heritage Program staff prior to implementation. Page 5 of 11 Authorization ID: ELD400821,Amendment#2 Exhibit A Project Area Location US DA t��' Exhibit A: South Tahoe Public Utility District Pioneer I rail Waterline -� U4S Special Use Authorization ID: ELD400821,Amendment #) LAKE TAHOE BASIN MANAGEMENT UNIT Ik. In a 11111 �� tel ---�Bear TV . /• )-..\_.„ far I I! ... 'a , / l, L NO 080 030 OZ il 111L • I21 a _ il , , 080:050-02 ,� -IJ , ` 080-050-14 Legend �♦ ownership • fi USDA F.,rRES'SERVICE 'N..... rk rN-ES ,.r ♦ ,'/ I 1 1 ST➢UD_NoneerTrlDroiect r05_trnu.t05_trnu.D.rcek Project Site Information CALIFORNIA \� Name:STPUD Pioneer Trail Waterline El Dorado County ' s. LAKE Special Use Authorization:ID: ELD400821,Amendment #2 Bra TAHOE Approx. 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USFS Decision Memo - Executed 2026 Pioneer Trail Waterline Project(Rebid) Pioneer Trail Water Line Project USDA EsTx RN South Tahoe Public Utility District U4S Amendment to Special Use Authorization Decision Memo Lake Tahoe Basin Management Unit, USDA Forest Service El Dorado County, CA Mt. Diablo Meridian, T. 12 N., R. 18 E., sec. 10, 15 BACKGROUND South Tahoe Public Utility District(STPUD) has a special use permit to operate and maintain a water system throughout the Tahoe Basin portion of El Dorado County. STPUD has determined that several areas of their water system need to be upgraded, including an area along Pioneer Trail, a paved road on NFS land in South Lake Tahoe authorized under special use permit to El Dorado County. STPUD has proposed to install, operate and maintain approximately 11,300 linear feet of new 16-inch water line, nine new fire hydrants and three new pressure regulating valves along Pioneer Trail between Marshall Trail and Susquehana Dr. This project is the third phase of a major infrastructure improvement to the South Lake Tahoe municipal water system, connecting neighborhoods to one main water line and improving fire protection in the local community. Installation of the water line requires trenching about three feet wide in existing asphalt roadway or up to five feet from the edge of pavement. The new water line would follow alignment of the existing sewer line authorized under STPUD master special use permit. All areas of construction are currently disturbed by the existing roadway. Areas of construction would be repaved or restored to pre-construction condition. There is one stream crossing at Trout Creek; the water main will extend through existing fill dirt within the roadway prism, roughly three to four feet above the top of the existing large diameter culvert pipe. No interaction with groundwater is anticipated for work in this area adjacent to Trout Creek; the surrounding slopes are dry and the roadway fill is well above both native soil and any groundwater. The project is proposed on three Forest Service parcels, APNs 080-030-002, 080-050-002 and 080-050-014, as shown in Exhibits A and B. Temporary staging would occur at three locations on Forest Service lands adjacent to Pioneer Trail as shown on design plans and the largest staging area is off Forest Service lands at the corner of Black Bart Ave and Pioneer Trail. Temporary access would be along the shoulder of Pioneer Trail. Twenty-one trees are proposed for removal. STPUD has prepared environmental and cultural review reports to satisfy CEQA and other requirements. Forest Service specialists have reviewed the proposal and found no extraordinary circumstances. Forest Service has consulted with the Washoe Tribe, and there may be cultural resources within the APE, so a Washoe Tribal Monitor will be on site during implementation. Page 1 of 10 DECISION I have decided to issue an amendment to the STPUD water system special use permit (ELD400821) authorizing the following changes on Forest Service land, APNs 080-030-002, 080-050-002, and 080-050-014: • Install, operate and maintain approximately 11,300 linear feet of new 16-inch water line, as described in this document and shown in Exhibits A and B • Install, operate and maintain nine new fire hydrants • Replace three existing pressure regulating stations • Use three temporary staging areas in existing roadside pullouts • Remove 21 trees in the project area(separate permit required) • Authorize 11,300 ft x 10 ft of permanent access to water line, plus 8,800 square feet of temporary staging, totaling 2.8 acres of disturbance PURPOSE AND NEED The purpose of this project is to issue an amendment to the master special use permit for South Tahoe Public Utility District to authorize new water facilities along Pioneer Trail. The new water line, fire hydrants and pressure regulating valves are critical improvements to the municipal water system to provide better neighborhood connections and improve fire protection in the community, which is surrounded by National Forest System lands. EXTRAORDINARY CIRCUMSTANCES This project meets the criteria for the Categorical Exclusion 7 CFR lb.4(d)(28): "Approval, modification, or continuation of special uses that require less than 20 acres of NFS lands." I find there are no extraordinary circumstances requiring further analysis in an EA or EIS. The environmental impacts of my decision have been analyzed and documented in the project record. 1. Federally listed threatened or endangered species or designated critical habitat, species proposed for Federal listing or proposed critical habitat, or Forest Service sensitive species.The project will not affect individuals, and it is unlikely to result in a trend toward Federal listing or a loss of viability for terrestrial endangered wildlife species, aquatic species and plant species. 2. Flood plains,wetlands, or municipal watersheds. The project will cross Trout Creek, but no impact to groundwater or the stream zone is anticipated. Trenching will occur in existing dirt at least 3 feet above the existing road culvert. 3. Congressionally designated areas, such as wilderness,wilderness study areas, or national recreation areas. The project is not located in these areas. 4. Inventoried roadless areas or potential wilderness areas. The project is not located in these areas. 5. Research Natural Areas. The project is not located in these areas. Page 2 of 10 6. American Indians and Alaska Native religious or cultural sites.The Washoe Tribe is aware of cultural resources within the project area that may be affected by the proposed project on the parcels within the project Area of Potential Effect(APE). They have requested a Washoe Tribal Monitor on site during the project. 7. Archaeological sites, or historic properties or areas.No sites or areas will be affected. Project review resulted in no archeological or historic resources being identified on the LTBMU parcels within the proposed project Area of Potential Effect(APE). The project area is located within a disturbed context and both archeological and historic resources are not at risk for this undertaking according to the R5 PA Appendix D, Stip. 7.8 (a). Archeological Survey Report Number: R2026051900012. FINDINGS REQUIRED BY OTHER LAWS This project is consistent with all federal, state, and local laws, specifically the standards and guidelines contained in the LTBMU Land Management Plan, the Endangered Species Act, and the National Historic Preservation Act. PUBLIC INVOLVEMENT STPUD included the project as a critical water system improvement during the Prop-218 Rate Setting Process, presented the Project to the District's Board of Directors at public board meetings, and publicly noticed the Negative Declaration finding for CEQA on CEQAnet and on the District's website. A public pre-construction meeting will be held to notify the nearby neighbors in advance of construction in Spring 2026. ADMINISTRATIVE REVIEW AND IMPLEMENTATION This decision is not subject to the pre-decisional administrative review process per 36 CFR § 218.23 - Proposed projects and activities not subject to legal notice and opportunity to comment. The legal notice and opportunity to comment procedures of this subpart do not apply to: (a) Any project or activity categorically excluded from documentation in an environmental assessment or environmental impact statement. CONTACT PERSON Lindsay Gusses, Special Uses Permit Administrator Lake Tahoe Basin Management Unit 35 College Drive, South Lake Tahoe, CA 96150 530-543-2637, Lindsay.Gusses@usda.gov Dionne Uzes Date Acting Forest Supervisor Lake Tahoe Basin Management Unit Page 3 of 10 In accordance with Federal civil rights law and U.S. Department of Agriculture(USDA)civil rights regulations and policies,the USDA, its Agencies,offices, and employees, and institutions participating in or administering USDA programs are prohibited from discriminating based on race, color,national origin, religion, sex, disability, age,marital status, family/parental status, income derived from a public assistance program,political beliefs,or reprisal or retaliation for prior civil rights activity, in any program or activity conducted or funded by USDA(not all bases apply to all programs).Remedies and complaint filing deadlines vary by program or incident. Persons with disabilities who require alternative means of communication for program information(e.g., Braille, large print, audiotape,American Sign Language, etc.)should contact the responsible Agency or USDA's TARGET Center at(202) 720-2600 (voice and TTY) or contact USDA through the Federal Relay Service at(800) 877-8339. Additionally,program information may be made available in languages other than English. To file a program discrimination complaint,complete the USDA Program Discrimination Complaint Form,AD-3027, found online at How to File a Program Discrimination Complaint and at any USDA office or write a letter addressed to USDA and provide in the letter all of the information requested in the form. To request a copy of the complaint form, call(866) 632-9992. Submit your completed form or letter to USDA by: (1)mail: U.S. Department of Agriculture,Office of the Assistant Secretary for Civil Rights, 1400 Independence Avenue, SW,Washington,D.C. 20250-9410; (2)fax: (202) 690-7442; or(3) email: program.intake@usda.gov. USDA is an equal opportunity provider, employer, and lender. Page 4 of 10 Exhibit A Project Area Location US DA -,t... ,��' Exhibit A: South Tahoe Public Utility District Pioneer I rail Waterline -� U4S Special Use Authorization ID: ELD400821,Amendment #) LAKE TAHOE BASIN MANAGEMENT UNIT al 114111:‘ 11 tel 11111 �� • •~ . Golden Bear 1F' JT )-..\_., far I I! ... 080-030-0212N2t a.. \---.----1-7/ 4. ' . i. _:_ty , , 0807050-02 ,' , a PPP -J ` 080-050-14 Legend �♦ im& ()wnership • /i USDA F.,rRES'SERVICE 'N..... rk rN-ES ,.r ♦ ,'/ I 1 1 ST➢UD_DaoneerTrlDao)eR r05_trnu.t05_trnu.R.rcek Project Site Information CALIFORNIA \� Name:STPUD Pioneer Trail Waterline El Dorado County ' s. LAKE Special Use Authorization:ID: ELD400821,Amendment #2 Bra TAHOE Approx. Elevation:6,300' f� s• ;Lake r,hate a Lat/Long Center: 119°58'16"W 38°54'N "r , - f' 1 =:�• AEA....avow im., rtpr,n.v00,wra.r not mot.oU.S.NINNY N.prgtan..ysoataa,, V =\,aa` Caked,__t.m 14414 b Speak 00 swat dam 000.!!liar 010 000r.00 than ae heat Lap Take.l.a ww0r . .O m u. ca Kra ,. .. ..,. .. d.m , N —� •�� ; y-= ,' �. 0 0.5 1 _ -, 1 , `a, - 'Is 1 Eat.NASA,NGA,USG.%l®MAS Fora Sorb.ro.lr Ta,aatrop and App.olo.Cs MAC) Page 5 of 10 Exhibit B Design Plans aueluermefirde . _ . ;j E oar _ • s �!1 4IIMI Vie° •a ee ee a ..e e ° a e e e. ..e ° : lit m Z , • e e � S _.=..,__. —...�,�,...._..:_.._ PLAN ' �....__v_. .._.- • ._..._....• ..�_.. .e ...=... s .-'=.. -.....w_,..� — — /s ..,e. N 6445 u. _i. .. 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B..BC BONE Z Z O N Q a N3� PROFILE PT Waterline 90+00 to 96+85 B" inn vtttttttvtitt tntnurnttnut _ _ — "" 6510 Bo6. 93.m 9.50 s1-m B,SO9,00 93.50 9,-00 . .,. 9,50 BB.m BB-w 9-CO B..b 98-0B 'e....uwu: PROFILE i 46606l1 9 s Page 10 of 10 END OF DOCUMENT THIS PAGE INTENTIONALLY BLANK 2o26 Pioneer Trail Waterline Project (Rebid) 5. USFS Resource Protection Measures 2o26 Pioneer Trail Waterline Project(Rebid) US Forest Service—Resource Protection Measures—March 2, 2026 BOTANY 1. Inventory— a) As part of site-specific planning, project areas and adjacent areas (particularly access roads)will be inventoried for invasive plants. Since implementation will begin before flowering periods, past survey findings will be utilized. b) Any additional infestation discovered prior to or during project implementation should be flagged and avoided, then reported to the Forest Botanist or their designated appointee for prioritization and assessment for treatment. 2. Known Invasive Plant Infestations - invasive plant infestations will be flagged and avoided by STPUD biologist(see map). Equipment traffic and soil-disturbing project activities must be excluded from these areas. If not avoidable, all equipment and vehicles must be cleaned following equipment cleaning guidelines before moving to another location. 3. Equipment Cleaning— a) All equipment and vehicles used for project implementation must be free of invasive plant material before moving into the project area. Equipment will be considered clean when visual inspection does not reveal soil, seeds, plant material or other such debris. Cleaning shall occur at a vehicle washing station or steam-cleaning facility before the equipment and vehicles enter the project area. b) When working in known invasive plant infestations or designated weed units, equipment shall be cleaned before moving to other National Forest Service system lands.These areas will be identified on project maps. c) Vehicles and other equipment that do not move directly from the National Forest System lands to the LTBMU must be washed to remove all plant material.When working in known invasive plant infestations, equipment shall be cleaned before moving to other National Forest System lands. 4. Staging areas—Do not stage equipment, materials, or crews in invasive plant-infested areas. 5. Control Areas—Where feasible, invasive plant infestations will be designated as Control Areas—areas where equipment traffic and soil-disturbing project activities pg. 1 US Forest Service—Resource Protection Measures—March 2, 2026 would be excluded. Where control areas cannot be avoided, treatments, equipment washing, revegetation, and surveillance monitoring will be implemented to minimize spread from project implementation. If Control Areas are designated, they will be identified on project maps and delineated in the field with flagging. 6. Project-related disturbance—Minimize the amount of ground and vegetation disturbance in staging and construction areas. Where feasible, reestablish vegetation on disturbed bare ground to reduce invasive species establishment; revegetation is especially important in staging areas. 7. Early Detection—Any additional infestation discovered prior to or during project implementation should be reported to the Forest Botanist or their designated appointee for prioritization and assessment for treatment. 8. Post Project Monitoring—After the project is completed the project area must be monitored for invasive plants. Monitoring cost recovery fees will be collected if the Forest Service will do this work. 9. Gravel,fill, and other materials—All gravel, fill, or other materials are required to be weed-free. Use onsite sand, gravel, rock, or organic matter when possible. Otherwise, obtain weed-free materials from sources that have been certified as weed-free. If an LTBMU inspector is not available to inspect material source, then the project proponent will provide a weed-free certificate for its material source. a) Mulch and topsoil—Use weed-free mulches and topsoil. Salvage topsoil from project area for use in onsite revegetation, unless contaminated with invasive species. Do not use material(or soil)from areas contaminated by cheatgrass. b) Erosion control materials—Wattles, blankets, and other BMP materials would be composed of certified weed free excelsior or coir mechanically bound in all-natural fiber nettings or socks (no straw or plastic/photodegradable netting is authorized). Erosion control materials would be protected from weather and/or handling damage prior to installation. 10.Revegetation— a) Reestablish vegetation on disturbed bare ground that would not otherwise return to pre-project native plant cover condition within 3 years to reduce invasive species establishment; revegetation is especially important in staging areas. b) Seed and plant mixes must be approved by the Forest Service. c) Non-native invasive species will not be intentionally used in revegetation. Seed would not be accepted until USFS has approved seed analysis results, which must pg. 2 US Forest Service—Resource Protection Measures—March 2, 2026 include weed testing for all State noxious weeds and follow AOSCA protocols for necessary sample sizes. The weed seed percentage in the seed lot would not exceed 0.02 or otherwise approved by the USFS. d) Persistent non-natives, such as timothy(Phleum pretense), orchardgrass (Dactylis glomerata), ryegrass (Lolium spp.), or crested wheatgrass (Agropyron cristatum)will not be used in revegetation. e) Seed and plant material will be from native, high-elevation sources in the Sierra Nevada as much as possible. Plant and seed material should be collected from as close to the project area as possible, from within the same watershed, and at a similar elevation whenever possible. WILDLIFE If vegetation removal is planned May-September, a qualified biologist should survey for nesting birds and bat roosts. If nests or roosts are found, they should be reported to the Forest Service wildlife biologist and removal should be delayed until the nest or roost can be confirmed unoccupied.These surveys will also be needed if vehicles and equipment will be going over bushes and other nesting habitats.The nest survey includes all migratory birds. Both bird and bat roosts surveys must be conducted no more than 14 days, but preferably 3-5 days prior to implementation. pg. 3 6. 2026 Right of Way Encroachment Permit 2o26 Pioneer Trail Waterline Project (Rebid) oo G COUNTY OF EL DORADO DEPARTMENT OF TRANSPORTATION °q��roaNP https://www.eldoradocounty.ca.gov/Land-Use/Transportation 2026 Right of Way Encroachment Permit Work Order#: 6800101 Issue Date: 04/15/2026 Final Date: Your Job#: Expiration Date: 04/15/2027 Inspector: Encroachment Location: Pioneer Trl (Marshall Trl to Susquehana Dr), South Lake Tahoe, CA Description of Work: Installation of new water main and three pressure reducing valve stations The County of El Dorado, State of California hereby authorizes and grants a revocable license(permit)to: PERMITTEE NAME: South Tahoe Public Utility District CONTACT: Trevor Coolidge ADDRESS: 1275 Meadow Crest Dr EMAIL: tcoolidge(a�stpud.us PHONE: (530) 543-6278 to do the work, construction and/or otherwise encroach upon the right of way of the County highway(s), as described below, in accordance with the El Dorado County Road Encroachment Ordinance Chapter 12.08. In the event the future improvement of the highway necessitates the relocation of such encroachment, the permittee will relocate the same at his sole expense. County inspections are required for each day of construction activity. • Call U.S.A. @"811"before you dig to locate underground utilities • 24 hours before starting work - Email your inspection request to: edcutilitypermits.tahoe@edcgov.us • 14 days before excavating: - Contact DOT to locate underground traffic signal wiring (530-642-4972 or shane.cohen@edcgov.us) All work shall be suspended if a copy of this permit is not at job site at all times. THIS PERMIT IS IN ACCORDANCE WITH THE STANDARD CONDITIONS FOR ROADWAY ENCROACHMENT PERMITS AND THE CONDITIONS BELOW: 1. Permittee must provide the DOT a list of Permittee's authorized contractors, on the "Authorized Contractors List" form and an executed "Encroachment Permit Contractor Authorization" form for each contractor prior to the start of work in the County Right of Way. ALL CONTRACTORS ARE ALSO RESPONSIBLE FOR COUNTY NOTIFICATION at: edcutilitypermits.tahoe@edcgov.us PRIOR TO START OF WORK. 2. If the County deems work done under any Encroachment Permit is unsafe,dangerous, or otherwise not in the public interest, the County or designee, may immediately stop the work until the situation is satisfactory, or revoke and VOID the Permit without refund of fees paid to the County. 3. When all work is finished, fill out the "Notice of Completion" and send via email to edcutilitypermits.tahoe(a�edcgov.us. 4. See "Standard Conditions" for all other permit conditions. RW Utility Project Encroachment Permit June 11,2025 WO#6800093 Page 1 of 2 Special Conditions: (conditions below supersede any conflicting Standard Conditions in whole or in part) SC 1. {list any special conditions} Digitally signed by Joseph Reinholdt Signature: Date:2026.04.15 15:19:36-07'00' Date: 04/15/2026 For Rafael Martinez, Director of Transportation Department of Transportation 2850 Fairlane Court, Placerville, CA 95667 (530) 621-5941 Direct (530) 621-2030 Fax DOT.permits@edcgov.us RW Utility Project Encroachment Permit June 11,2025 WO#6800093 Page 2 of 2 �oa"°° STANDARD CONDTIONS 7APrmW for Roadway Encroachment Permits El Dorado County Department of Transportation https://www.eldoradocounty.ca.gov/Land-Use/Transportation The Permit All work shall be performed in conformance with the El Dorado County Road Encroachment Ordinance, the approved encroachment permit("permit"), including any approved drawings, the permit's standard conditions,the permit's special conditions, and the most recent version of the Caltrans Standard Specifications. There will be no changes in the work described by the approved permit without written permission from the El Dorado County Department of Transportation (DOT). The Encroachment Permit or a copy thereof shall be kept at the site of the work and must be shown to any representative of the DOT or any law enforcement officer on demand. Work shall be suspended if permit is not at work site during construction. 1. Permittee Authorization for Others to Perform Work: This encroachment permit allows only the Permittee and/or Permittee's authorized contractor(s) to work within or encroach upon the County right-of-way, and the Permittee may not assign or transfer this encroachment permit. Any attempt to assign or transfer this encroachment permit shall render the permit null and void. Permittee shall provide to the DOT a list of Permittee's authorized contractors, on the "Authorized Contractors List" form and an executed "Encroachment Permit Contractor Authorization"form for each contractor prior to the start of work. Permittee shall keep the list current and shall provide updates to DOT immediately upon any change to the list of authorized contractors, including but not limited to the addition, removal, or substitution of an authorized contractor, or a new address or new contact information for an existing authorized contractor. Permittee is responsible for the acts and/or omissions of any person or entity acting on behalf of the Permittee, even if such person or entity is not included on Permittee's list of authorized contractors. Contractors authorized to work under the encroachment permit are required to adhere to the Standard Permit Conditions for"Indemnity","Insurance","Proof of Insurance Requirements", and"Insurance Notification Requirements". 2. Notification & Correspondence The Permittee shall notify the DOT 24 hours in advance of the day the work within County rights-of-way is to begin by contacting the Utility Encroachment Division at edcutilitypermits(c�edcgov.us (West Slope) or edcutilitypermits.tahoe(a�edcgov.us (Tahoe Basin)for any of the following work items: A) Initial start of work B) Restarting work when work has been interrupted C)Any saw cutting of Asphalt Concrete (AC) or paving D)Any changes to scope of the approved permit A pre-job conference between County and Permittee is required before work begins. Permittee personnel in attendance shall be (at a minimum) project manager(s), supervisors, foremen, and key contractor personnel (if applicable). Permittee shall provide County with the name, address, email, and phone numbers (office and cell) of the person in responsible charge of Permittee's work prior to the beginning of work. Permittee shall be responsible for coordination with local businesses, fire protection agencies, law enforcement agencies, emergency response, school district(s), and residents that are affected by Permittee's work as determined by County. The level of public outreach will be determined by the County and will be commensurate with the approved scope of work to be performed by Permittee. Additional Notification for Signalized Intersections: Permittee shall provide notification to the appropriate email address above of any work within 500 feet of a signalized intersection a minimum of 14 calendar days prior to any excavating or saw cutting so that DOT can locate and mark underground traffic signal infrastructure. 2025 Standard Conditions Encroachment Permit 20251030.docx Page 1 of 13 3. Inspection, Inspection Fees, and Approval by DOT All work is subject to inspection at any time by DOT. All work in County right of way is subject to DOT approval. The Permittee shall notify the DOT when the work has been completed by submitting a NOTICE OF COMPLETION form. DOT will inspect all work within County rights of way. The Permittee shall pay DOT the actual cost of DOT inspection, including any material testing performed by DOT. Inspection fees are to be paid in accordance with Section 12.08 of the El Dorado County Ordinance Code. Charges for inspection services will be billed to the Permittee at 30-day intervals and upon completion of the project. 4. Compliance with California Business and Professions Code Section 8771 Permittee shall use a professional land surveyor (California licensed land surveyor or licensed civil engineer legally authorized to practice land surveying)to research and determine whether Permittee's work will impact existing survey monuments. If Permittee's professional land surveyor determines that no existing survey monuments will be impacted by the permitted work, then Permittee's professional land surveyor shall stamp, sign, and return the El Dorado County Certificate of Monument Preservation. If Permittee's professional land surveyor determines that existing survey monuments will be impacted by the permitted work, Permittee shall comply with Section 8771 and have its licensed land surveyor locate and reference the existing survey monuments and file a corner record or record of survey with the El Dorado County Surveyor's Office. If any existing survey monuments are damaged, destroyed, or otherwise impacted by Permittee's work, Permittee shall replace such monuments in accordance with California Business and Professions Code Section 8771. 5. Relocation of Facilities—Section 1463, Streets & Highway Code Permittee or Permittee's successor in interest is responsible for the proper maintenance of the encroachment covered by this permit. Permittee is required to maintain its facility and repairs to the roadway in perpetuity. In the event the future improvement of the highway necessitates the relocation of this encroachment, Permittee will relocate its encroachment at Permittee's sole expense. DOT shall serve on the Permittee a written demand specifying the place of relocation and specifying a reasonable time within which the work of relocation must be concluded. Permittee must complete such relocation within the time specified. 6. Working Hours, Traffic Control, and Public Convenience A. Daytime Working Hours All work will be performed during the daylight hours of 8:30 am to 6:00 pm, Monday through Friday, only on non- holidays, unless otherwise indicated in the permit. Working hours may be re-assessed on a case-by-case basis as determined by DOT. For some areas, including but not limited to areas with heavy traffic, Permittee will be required to perform its work at night (see Special Conditions in approved Permit). For all work that impacts traffic, a traffic control plan approved by DOT will be required before Permittee starts any work. If, after work starts, traffic control measures are not satisfactory for existing traffic conditions, then revisions will be necessary as directed by DOT. The County observes the following holidays: New Years Day Memorial Day Veteran's Day Martin Luther King, Jr. Day Independence Day Thanksgiving Day and the Day after Thanksgiving President's Day Labor Day Christmas Eve and Christmas Day B. Nighttime Working Hours When night work is required, Permittee shall notify DOT at least 5 working days in advance of the proposed work start date. Night work hours shall be from 9:00 pm. to 6:00 am, Sunday night through Friday morning, and only on non- holidays. Permittee is allowed to have traffic control hardware set up and staged, but Permittee shall not close any lanes until 9:00 p.m. Permittee shall comply with DOT directives to mitigate noise and light. Permittee shall immediately mitigate all complaints received regarding Permittee's night work to the satisfaction of DOT. Permittee must reopen all lanes by 6:00 a.m. C. Signing/Traffic Control A traffic control plan (TCP)shall be prepared by Permittee for specific site conditions prior to work beginning. The TCP will be prepared by an experienced traffic control systems specialist, in compliance with the requirements of the most recent version of the California Manual on Uniform Traffic Control Devices (MUTCD) and Caltrans Standard Plans. DOT approval of Permittee's TCP is required before Permittee implements any traffic control on County roads. 2025 Standard Conditions Encroachment Permit 20251030.docx Page 2 of 13 Permittee's TCP shall provide accommodation for pedestrians and cyclists to pass safely through the job site. When flaggers are required, permittee shall use only California certified flaggers. When Changeable Message Sign (CMS)boards are required for construction in the County right-of-way,the signs shall be placed 72 hours in advance of construction activity. Permittee is required to get DOT approval of CMS board locations 48 hours prior to placement. When applicable, R30 24" x 24" barricade mounted "NO PARKING" notices shall be placed in the area of proposed shoulder closure and work zone a minimum of 72 hours prior to the start of work. Spacing shall be a maximum 20 ft. apart or as determined by DOT. During active construction, Permittee may hold traffic for a maximum of 5 minutes. Permittee must obtain explicit approval from DOT for any traffic holds that exceed 5 minutes. The approach end of temporary railing (Type K) shall be offset a minimum of 15 feet from the edge of the traffic lane open to public traffic. The temporary railing shall be installed on a skew toward the edge of the traffic lane of not more than one foot transversely to 10 feet longitudinally with respect to the edge of the traffic lane. If the 15 foot minimum offset cannot be achieved, the temporary railing shall be installed on the 10-to-1 skew to obtain the maximum available offset between the approach end of the railing and the edge of the traffic lane, and an array of temporary crash cushion modules appropriate for traffic speed shall be installed at the approach end of the temporary railing in accordance with Caltrans Standard Plans. Whenever work is performed or vehicles/equipment are operated in the following work areas, the Contractor shall close the adjacent traffic lane unless otherwise provided in the Permit: Approach Speed of Public Traffic Posted Limit in Miles per Hour Work Areas 45 mph or over Off the traveled way but within 6 feet of the edge of traveled way Below 45mph Off the traveled way but within 3 feet of the edge of traveled way The lane closure provisions of this section shall not apply if permanent or temporary railing or barrier protects the work area. When traffic cones or delineators are used to delineate a temporary edge of traffic lane, the line of cones or delineators shall be considered the edge of the travel lane. The Contractor shall not reduce the width of an existing lane to less than 12 feet without approval from DOT. D. Public Convenience and Public Safety Protection of the public is paramount. In the Interest of public safety and convenience, DOT reserves the right to make any changes and prescribe such additional conditions to any permit as DOT may deem necessary for public safety or public convenience. No work that impacts public traffic is permitted during inclement weather. This limitation includes those conditions which would make the roadways wet, snowy, icy, or slippery, or any conditions that would limit driver visibility. Only emergency work may be performed during inclement weather. The fact that inclement weather or other causes, either within or beyond the control of Permittee, may force delay of the work shall in no way relieve the Permittee of their responsibility for maintaining traffic through the project and providing local access as specified herein. At all times there shall be kept on the job such material, force, and equipment as may be necessary to keep roads,shoulders,and driveways within the project open to traffic and in good repair, and Permittee shall expedite the passage of traffic using such force and equipment as may be necessary. The work shall be performed in an expeditious manner to minimize inconvenience to the traveling public. Permittee shall be responsible for maintaining a free and clear travel way for emergency vehicles. Private driveways may only be closed when Permittee's work is actively impacting such driveways, and all private driveway closures must be coordinated with residents to allow for reasonable resident use of the driveway during construction. Driveways shall be open for use when work is not actively impacting those driveways. Commercial driveways shall not be closed during business hours. Permittee shall provide safe passage for pedestrians and bicyclists through or around the active work zone at all times. When approved by DOT as part of Permittee's TCP, Type II barricades with"SIDEWALK CLOSED TO PEDESTRIANS" 2025 Standard Conditions Encroachment Permit 20251030.docx Page 3 of 13 shall be placed prior to start of work. Sidewalks may only be closed to through pedestrian traffic and shall not prevent local pedestrian access. Pedestrian detours shall not increase the path of pedestrian travel by more than 500 feet. Detour routes shall be limited to existing sidewalks and marked pedestrian crossings. Pedestrians shall not be detoured onto private property. During working hours when pedestrian traffic is present, at least one worker shall be assigned escort elderly, disabled or any other pedestrians in need of assistance through the construction site. If Permittee's work requires removal of existing signs or snow stakes,they shall be replaced at the end of the shift during which they were removed. Signs or stakes damaged by construction shall be replaced at the Permittee's expense. No work is permitted while any snow is on the roadway unless work is emergency work. No aerial (overhead)work shall be permitted over an active lane of traffic. No loads shall be hoisted over an active lane of traffic, and portions of cranes or boom trucks shall not be placed over active lanes of traffic. Any lane(s)over which Permittee plans to hoist loads shall be closed per Permittee's approved TCP. This permit does not provide for full closure of any road. All full road closures require a "Full Road Closure" permit and take approximately thirty (30) calendar days to process. Permittee must download, complete, and email the "Full Road Closure" permit application dotpermits@edcgov.us should it be determined that a road closure will be required. 7. Joint Trench Coordination Utility encroachment permit applicants shall cooperate with the other utilities (cable, gas, electric, and telecommunications) to share trench space in order that additional street cuts will not be necessary for the next few years. Documentation of this coordination is required. 8. Utility Location Plan Where a utility crossing is to be installed within an existing paved area, the utility shall be placed as near as perpendicular to centerline as possible, and in no case at an angle less than 45 degrees from the centerline of the roadway. Where a utility is to be installed longitudinally within an existing paved area, the utility shall be placed parallel to the centerline and outside of wheel paths. Facilities shall have a minimum horizontal and vertical separation of one foot from existing facilities, including but not limited to drainage culverts and other utilities, unless greater separation is required by the adjacent utility company facility. This requirement typically results in the utility lines being placed below all storm drain pipes, manholes and drainage inlets. Any exceptions may require the utility to be placed in a rigid sleeve as approved by DOT. Steel sleeves, when allowed, will be required to extend a minimum of 10 feet beyond either side of the existing facility, with no joints allowed directly over the existing facility. Minimum cover from the bottom of drainage ditches to the top of the new facility installed by Permittee is 18". When utility equipment is placed under pavement above 2,000' elevation, lid or surface of utility equipment shall be surrounded by 12" wide concrete collar, 6 inches thick. Concrete collar shall be placed perfectly flush with adjoining road surface. Lid or surface shall be recessed '/" below the concrete collar. Below 2,000' elevation, no concrete collar or recessed lid or surface will be required. 9. Obstructions For the purpose of encroachment permits,obstructions are understood to mean fixed utility appurtenances or equipment (e.g., transformers, switches, splicing hardware, blow-offs, valves, service pedestals/risers, etc.). When possible, obstructions shall be placed below ground and outside the traveled way. When required, above ground obstructions shall be placed a minimum of 10 feet from the edge of traveled way and outside of the roadway cross section (pavement, shoulder, and roadside ditch). Above ground obstructions (excluding utility poles) shall be breakaway and shall not obstruct sight distances for motorists or interfere with drainage. Above ground obstructions (including utility poles) shall be placed a minimum of 10 feet from the edge of traveled way. When no longer in use, poles shall be removed at ground level. No obstructions shall be placed in roadside ditch. 10. Earthwork A. Excavation Requirements 2025 Standard Conditions Encroachment Permit 20251030.docx Page 4 of 13 1. In the Tahoe Basin there shall be no grading or land disturbance between October 15 and May 1. Permittee is referred to the Tahoe Regional Planning Agency (TRPA) Code of Ordinances, subsection 33.3 and Attachment Q: Standard Conditions of Approval for Grading Projects regarding grading standards in the Tahoe Basin. 2. No blasting shall be permitted within the County's right-of-way without authorization from DOT. Blasting shall be planned and executed in accordance with current requirements in the Caltrans Standard Specifications. 3. When rock wheel trenching is proposed by Permittee and approved by DOT,the edge of rock wheel trenches in roadways shall be a minimum 12 inches from the lip-of-gutter. 4. Where an excavation consists of trenching parallel to the centerline of the road, the total length of open trench shall not exceed 500 feet at any time. All excavations in the roadway must be backfilled and temporarily patched with HMA, cold mix,or plated over the backfill at the end of each work day. All other open excavations outside the limits of paving and/or behind curb and gutter shall be backfilled or covered with steel plate bridging and protected with appropriate barrier fencing at the end of each work day. 5. Permittee shall design and install a DOT approved subdrain system to address all areas where pumping or seepage exists due to disruption of subsurface conditions encountered during excavating in the County's right- of-way. 6. Trenches shall be constructed such that any groundwater present will not be held within the trench. If groundwater is present in Permittee's trench, a"plug and drain"plan shall be submitted by Permittee,approved by DOT, and implemented by Permittee to allow groundwater in the trench to release into an existing DOT drainage inlet. Since groundwater elevations can rise during the winter, this permit condition may apply to trenches that are dry in summer B. Trench backfill material requirements: Reference is made to Utility Trench Detail, attached to these Standard Conditions. This Utility Trench Detail supersedes County Standard Plan 119. Trench backfill must immediately follow the placement of the utility. See Temporary Steel Plates if trench backfill cannot be performed in the same day. Trench backfill requirements are specified as follows: 1. Pipe zone backfill: i. Shall be at the discretion of the utility company and submitted to DOT and shall be compacted to 90% relative compaction. 2. Intermediate trench backfill: i. Sewer/Water lines: Backfill to consist of Class 2 Aggregate Base. The material is to be compacted in 8- inch lifts to 95% relative compaction. ii. All other utility facilities: Backfill to consist of DOT approved cement slurry mix. DOT approved `popcorn' cement slurry mix shall be placed in 8" lifts and compacted to 95% relative compaction. 3. Structure backfill (manholes, vaults, headwalls, etc.): i. Structure backfill for all structures in paved areas shall conform to the cement slurry mix provisions noted below. C. Cement Slurry Mix (CSM) requirements: 1. DOT prefers that Permittee use DOT approved CSM mixes from DOT approved vendors. 2. Permittee may use alternate CSM mix designs and/or alternate vendors, but any such alternate CSM mix design must be submitted to DOT for review and approval prior to starting any permitted work for which CSM is being used. The CSM mix design and test data shall demonstrate that the CSM mix design meets the following provisions: i. A 28-day compressive strength of 50 psi to 150 psi is required. Compressive strength shall be determined by ASTM Designation: D4832, Preparation and Testing of Soil-Cement Slurry Test Cylinders. ii. Can be excavated by a standard sized backhoe after 28 days of trench cure time. 3. When CSM is used for utility pipe zone for sewer and waterlines, the clear width on each side of the pipe may be reduced to a minimum of 6" instead of the 12". 2025 Standard Conditions Encroachment Permit 20251030.docx Page 5 of 13 4. Any CSM temporarily placed to the surface of existing pavement shall be maintained by the Permittee and removed prior to final paving to accommodate final HMA thickness. D. Compaction Testing requirements: Where Class 2 Aggregate Base is allowed by permit, Permittee shall be responsible for compaction testing. Testing shall be performed at 100' intervals (or at tighter intervals when directed by DOT)for each 8-inch lift of compacted aggregate base backfill for the full trench profile by a geotechnical engineering firm approved by DOT. All testing results must be submitted to the DOT within 10 days of work completion if project work is less than one month. 11. Temporary Steel Plates When Permittee is on site actively working from day to day, temporary steel plates may be used to cover Permittee's work in the roadway with DOT prior approval. Permittee must submit a design by a California registered civil engineer. If approved for use by DOT, Permittee must install temporary steel plates in accordance with manufacturer's tabulated data or design by California registered civil engineer. All temporary steel plates must include non-skid surface that complies with current Caltrans Standard Specifications. Steel plates shall only be placed parallel or perpendicular to the travel way. After plates have been in place for 5 working days, plates must be replaced with temporary hot mix asphalt, cold mix or final pavement restoration per Utility Trench Detail. A. Use of Temporary Steel Plates Over Backfilled Trench 1. Temporary steel plates used over backfilled trenches shall be installed per manufacturer's tabulated data. 2. Temporary steel plates shall be secured against displacement by using pins or other devices. Adjoining plates shall be tack welded together. 3. Where the speed limit is 25-mph or less,temporary steel plates may be placed on top of the existing pavement for up to 48-hours. After 48 hours, plates must be recessed into the surrounding pavement by grinding the pavement to a depth equal to the thickness of the plate and to a width and length equal to the dimensions of the plate. Temporary cold mix paving shall be placed around the plates and appropriate signage placed. 4. Where speeds are greater than 25-mph, plates must be recessed at first use by grinding the pavement to match the thickness of the plate. W8-24 "Steel Plate Ahead" signs will be required. B. Use of Temporary Steel Plates Over Open Trench 1. Temporary steel plates may be used over a trench or excavation that is not backfilled only if the trench or excavation is shored. Any such use of plates over a shored excavation requires DOT approval of a design prepared by a California registered civil engineer or a design that utilizes manufacturer's tabulated data. The design must be submitted to DOT for review at least 14 days before intended use and must demonstrate that the plates combined with the shoring are appropriate for the size of the excavation, the soil type(s) present, and HS20 traffic surcharge loading on the plates and the shoring. 2. Temporary steel plates shall be secured against displacement by using pins or other devices. Adjoining plates shall be tack welded together. 3. Where the speed limit is 25-mph or less,temporary steel plates may be placed on top of the existing pavement for up to 48-hours. After 48 hours, plates must be recessed into the surrounding pavement by grinding the pavement to a depth equal to the thickness of the plate and to a width and length equal to the dimensions of the plate. Temporary cold mix paving shall be placed around the plates and appropriate signage placed. 4. Where speeds are greater than 25-mph, plates must be recessed at first use by grinding the pavement to match the thickness of the plate. W8-24 "Steel Plate Ahead" signs will be required. 12. Roadway Surfacing and Roadway Base Materials (see Utility Trench Detail) When permit authorizes installation by open cut method in roadway, Permittee shall excavate and restore roadway per Utility Trench Detail. Permittee shall complete final pavement restoration in a timely manner. Failure to complete timely final pavement restoration as determined by DOT will result in suspension of review and issuance of subsequent encroachment permits to Permittee until final pavement restoration is complete. All final pavement restoration must be complete by October 15th, or Permittee will be required to patch pave all excavations with HMA and maintain all patch paves until final 2025 Standard Conditions Encroachment Permit 20251030.docx Page 6 of 13 pavement restoration is complete. Installation of HMA patch paves does not relieve Permittee from performing final pavement restoration in a timely manner. A. Potholing: Potholing through existing roadway for any purpose shall be performed using coring machine and Hydro-vac. No jackhammering of roadway surfacing will be allowed. Pothole excavations performed by coring will be backfilled to 3 inches below top of roadway with one-sack wet flowable sand slurry mix consolidated by mechanical vibration or full depth rodding. Permittee shall submit and obtain DOT approval of one-sack flowable sand slurry mix prior to excavating any potholes. The top 3 inches of one-sack wet flowable slurry mix shall be mixed separately in a suitable container with an additional 2 cups of Type II Portland cement, carbon black pigment(or equal) and a very small amount of water to form a well-blended homogeneous mixture. This mixture shall be finished off smooth at top of roadway surface. All potholing outside of proposed trenching limits and not exhumed in the process of trenching shall be permanently backfilled per these requirements by the end of each workday. Potholes that are within the trenching limits may be temporarily backfilled with class 2 aggregate base and capped with cold mix asphalt concrete by the end of each shift. B. Temporary Pavement Repair: Temporary repairs to pavement shall be made and maintained upon completion of backfill until final pavement restoration is complete. Temporary pavement patches shall be placed and maintained with a smooth riding plane. Temporary Pavement Patches shall consist of: 1. Hot Mix Asphalt on all major and minor collector roadways, arterial roadways, and expressways having a posted speed limit greater than 25 mph, and on un-posted rural roadways. 2. Cold mix (cut-back) asphalt, free of humps or depressions and made suitable for pedestrian, bicycle, and vehicle traffic may be used as temporary pavement repair on low-speed residential roadways and roadways having a posted speed limit of 25 mph or less. C. Final Pavement Restoration Requirements: No permanent HMA patch is allowed over areas that have failed compaction testing. Do not place HMA on wet pavement or frozen surface. Before placing HMA, subgrade must be free of loose and extraneous material. Remove loose paving particles, dirt, and other extraneous material by sweeping. Hot Mix Asphalt(HMA) Mix shall be a DOT pre-approved HMA mix or shall be submitted by Permittee and approved by DOT pursuant to the following criteria: 1. AC aggregate size and grading shall be Caltrans Type A 1/2 inch HMA, unless otherwise directed by the DOT. Up to 25% RAP is acceptable. 2. AC Binder will be PG 64-16 (for AC dike use PG 70-10) (West Slope) and PG 64-22 or PG 64-28 (Tahoe Basin). 3. For RAP substitution of 15% or less, the grade of the virgin binder must be the specified grade shown above. For RAP substitution greater than 15% and not exceeding 25%, the grade of the virgin binder must be the specified grade of asphalt binder for Type A HMA with the upper and lower temperature classification reduced by 6 degrees C. Limits and thickness of final pavement restoration shall comply with the Utility Trench Detail. Any damage to existing adjacent pavement caused by Permittee activity will require repair or replacement as determined by DOT. Before placing HMA apply a tack coat to existing pavement including planed surfaces and vertical surfaces of curbs, gutters, and joints. If the ambient air temperature is below 50 degrees F cover the loads in trucks with tarpaulins. If the ambient air temperature is below 60 degrees F and the time from HMA discharge to truck at the HMA plant to the transfer to paver's hopper or pavement surface is 60 minutes or greater, cover the loads in trucks with tarpaulins. The tarpaulins must completely cover the exposed load until you transfer the mixture to the paver's hopper or the pavement surface. Spread HMA at the ambient air temperature of 50 degrees F and rising. When HMA is deposited by windrow the temperature of the HMA shall not drop below 250 degrees F. Compact the first coverage of breakdown compaction before the HMA surface temperature drops below 240 degrees F, breakdown and intermediate compaction before the HMA surface temperature drops below 190 degrees F, and finish 2025 Standard Conditions Encroachment Permit 20251030.docx Page 7 of 13 compaction before the HMA surface temperature drops below 140 degrees F. Static rolling may continue below 140 degrees F to remove roller marks. HMA may be cooled with water when rolling activities are complete if authorized by DOT. D. Smoothness Requirements: Finish pavement surfacing shall have a straight uniform appearance without numerous jogs, shall be placed level with the adjacent paving after compaction, and shall match existing cross-slope and roadway crown. If new surfacing is too high, it shall be cold planed to grade, and a type 2 bituminous seal coat applied per current Caltrans Standard Specifications. If new surfacing is too low, it shall be ground out and repaved correctly. DOT accepts HMA pavement surfaces for smoothness based on compliance with straightedge smoothness specifications. HMA pavement smoothness is determined using a 12-foot straightedge. The pavement surface must not vary from the lower edge of the straightedge by more than: 1. 0.01 foot when the straightedge is laid parallel with the traffic lane centerline 2. 0.02 foot when the straightedge is laid perpendicular to the centerline and extends from edge to edge of a traffic lane 3. 0.02 foot when the straightedge is laid within 24 feet of a pavement conform 13. Care of Drainage Roadside ditches, culverts, pipes, dikes, curbs, and other drainage facilities pertinent to County roads shall be protected from damage by Permittee. Facilities disturbed or damaged shall be returned to their original conditions or replaced by Permittee in accordance with direction from DOT. Trenching and excavations across or through roadside drainage ditches shall be backfilled to finish grade (flow line) with CSM or minor concrete as approved by DOT and made to drain. Utility lines crossing a ditch shall be a minimum of 18" below flow line. Ditches that have been disturbed by Permittee and have evidence of high volume or storm water velocities will require velocity dissipation as determined by DOT. Any removal of curb and gutter shall be to expansion joints and replaced with a concrete mix design, submitted by Permittee and approved by DOT, having a minimum of 463 Ib/cy. cementitious material. Curb concrete will contain 3 each#4 rebar dowels drilled and epoxied 6 inches into adjacent existing curbs. Any utility service location stamps i.e.: "S", "W", "G", "R"that are in the existing curb face and removed by reason of permittee's work shall be included in the new concrete replacement. Tunnel under curb and gutter shall be backfilled with a CSM mix. Asphalt binder for HMA dike shall be PG 70-10. 14. Shoulder Restoration All soils off pavement and within County right-of-way that have been disturbed or impacted by Permittee activity shall be groomed and compacted to 90% minimum. Disturbed soils shall be treated with temporary and permanent soil stabilization and erosion control measures as directed by DOT. Disturbed shoulder areas that are available for motorist use, unpaved, and un-landscaped will be re-established to the original width with class II aggregate base a minimum of 4" thickness after compaction to 95%. Such areas will match existing roadway cross-slope and graded to drain. All landscape improvements in County right of way (including but not limited to decorative rock or fiber mulch surface cover including fabric barrier, ornamental iron fencing, established lawn, perennial shrubs, etc.)disturbed by Permittee shall be re-established to pre-work conditions or better. 15. Clean-Up of Right of Way A. During work activities: No spoils, backfill material, or import material shall be placed on a County Road or anywhere in County right of way.All roadways shall remain free of dirt and debris during all Permittee activities, including but not limited to all periods of excavation, load-out, boring and backfill. Permittee will be required to use a vacuum street sweeper as directed by DOT. Kick-broom sweepers shall not be used. B. End of workday: All debris and material shall be entirely removed and the County's right-of-way left in a safe, clean, and presentable condition as before work started. C. Pavement Striping and Pavement Markings: 2025 Standard Conditions Encroachment Permit 20251030.docx Page 8 of 13 Permittee shall replace any roadway striping or pavement markings that become marred, chipped or otherwise obliterated due to construction activities. Materials for use by Permittee for new striping or markings shall be submitted to DOT for approval and shall meet current MUTCD requirements. All USA marks will be blacked out by Permittee. Black out will form a square or rectangle over the original USA markings and will provide for permanent elimination of Permittee's USA markings. Do not use water or chalk-based paints. 16. Locator Wire All runs of non-metallic pipe shall have a minimum No. 12 gauge, solid insulated soft-drawn copper wire securely affixed along the top of the pipe. The wire shall be stubbed up inside each valve box and dead-end blow-off assembly. SW Gas Corporation is permitted to use 14-gauge copper wire per their standards. 17. Horizontal Directional Drilling Bore and receiving pits shall not create a hazard and must be shored in accordance with Cal OSHA requirements. All pits must be lined with filter fabric when ground water is encountered and pumping is required. A. Drilling mud/fluids: 1. Permittee shall ensure that all drilling fluids are disposed of in a manner acceptable to all appropriate local, state, and federal regulatory agencies. 2. Drilling mud shall be used during drilling and back reaming operations. The drilling mud in the annular region shall NOT be removed after installation, but permitted to solidify and provide support for the pipe and neighboring soil. 3. Excess drilling fluids shall be contained at entry and exit points until recycled or removed from the site. Entry and exit pits shall be of sufficient size to contain the expected return of drilling fluids and soil cuttings. Drilling fluids shall not enter ditches, streets, manholes, sanitary sewers, storm drains or any other drainage systems. B. Surface monitoring/restoration requirements: 1. Permittee is responsible for repair or replacement (as determined by DOT) to any highway or non-highway facility caused by escaping (frac-out)drilling fluid, or by any facet of the directional drilling operation. 2. Permittee shall, prior to and upon completion of the directional drill, establish a Survey Grid Line and provide monitoring as outlined in their submitted detailed monitoring plan. 3. Subsurface monitoring points shall be utilized to provide early indications of settlement, as large voids may not materialize during drilling due to pavement bridging. 4. Should the drilling operation be unsuccessful, Permittee shall backfill of any voids with pressurized grout. If a bore hole beneath a roadway must be abandoned, the hole shall be pressure backfilled with grout. C. Prior to beginning boring operation: 1. Call "811"to locate underground utilities. 2. Pothole and locate all "USA" identified existing facilities. 3. Visually check surrounding area for other possible underground utilities not marked, including but not limited to storm drain manholes, fire hydrants, pedestals, etc. 4. Submit and obtain DOT approval of Boring Plan, to include the following: i. Pipe size and depth ii. Location and pitch of entry and exit pits (including test pits or boreholes undertaken during the soil investigation) iii. Working areas and their approximate size iv. Proposed pipe fabrication and layout areas v. County right-of-way lines, property lines, easement lines vi. All existing utilities (both horizontal and vertical) vii. Construction method including diameter of pilot hole, number, and size of pre-reams 5. Submit and obtain DOT approval of Drilling Fluid Management Plan, to include the following: 2025 Standard Conditions Encroachment Permit 20251030.docx Page 9 of 13 i. Mix design of drilling fluid ii. Method of slurry containment iii. Method of recycling drilling fluid and spoils (if applicable) iv. Method of transporting drilling fluid and spoils off-site D. Safety Requirements: 1. The drilling unit must be equipped with an electrical strike safety package. The package shall include warning sound alarm, grounding mats (if required for that specific rig), and protective gear. 2. Drilling unit and bore pit hole shall be fenced. All potholes, entry pits, and exit pits are to be barricaded. If the bore pit is closer than 12 feet from the edge of traveled way,temporary railing (type K)and crash cushions shall be placed per Section 6 of this Permit, "Working Hours, Traffic Control, and Public Convenience." 18. Fugitive Dust, Asbestos Dust Controls, and Water Quality Regulations Permittee shall comply with all County, State and Federal air and water quality regulations and all directives issued by DOT regarding mitigation of Permittee's impacts to air and water quality. Minimum BMP's must be maintained at each site including, but not limited to ingress/egress from County roadway, perimeter controls, track-out prevention, and concrete washout facilities. A. Fugitive Dust and Asbestos Dust Controls El Dorado County has a "zero dust" policy. Water must be always available on-site for dust control. Fugitive and asbestos dust shall be mitigated in accordance with El Dorado Air Quality Management District (AQMD) Rule 223-1, Fugitive Dust- Construction Requirements and/or Rule 223-2, Fugitive Dust-Asbestos Hazard Mitigation. Permittee shall be responsible for checking and following the most current procedures and regulations of the AQMD prior to beginning work. These are available at: www.edcgov.us/airqualitymanagement If AQMD rules require Fugitive Dust Plan or Asbestos Dust Mitigation Plans be prepared for permitted work, Permittee shall submit and obtain AQMD approval of required plans. Permittee must submit AQMD approved Fugitive Dust Mitigation or Asbestos Dust Mitigation plans to DOT prior to beginning project. If no Fugitive Dust Plan is required by AQMD rules, Permittee's work must still comply with the provisions of AQMD Rule 223-1. B. Water Quality Regulations Permittee shall comply with all County, State and Federal air and water quality regulations and all directives issued by DOT regarding mitigation of Permittee's impacts to water quality. Temporary and permanent erosion control best management practices (BMPs) shall be placed and maintained to prevent sediment and other pollutants from impacting water quality. All waste resulting from saw cutting of pavement will be removed using a vacuum during the cutting process or immediately thereafter. Discharge of waste material to any drainage facility is prohibited. Permittee shall provide an approved storm water pollution prevention plan (SWPPP)to DOT if a SWPPP is required by the SWRCB for Permittee's work. For projects that do not require a WDID from the SWRCB, Permittee shall implement temporary and permanent best management practices for erosion and sediment control to eliminate discharge of sediments and other pollutants outside the limits of Permittee's work. For projects that do not require a permit from the SWRCB, erosion and sediment control measures are to be in place prior to any storm event, and in place and in operable condition by October 15. Site inspections shall be conducted by Permittee before and after each storm event to identify areas that contribute to erosion and sediment problems or any other pollutant discharges. During each inspection, Permittee shall immediately install any additional BMPs required to eliminate pollutant discharges from Permittee's work. Permittee shall be responsible for fines, penalties, and damages, whether proposed, assessed, or levied against the Permittee, or El Dorado County(including employees, agents and assigns of the County)as a result of the Permittee's failure to comply with Federal, State,or local water quality regulations and requirements or as a result of citizen lawsuits. 2025 Standard Conditions Encroachment Permit 20251030.docx Page 10 of 13 Penalties shall also include but not be limited to payments made or costs incurred in settlement for alleged violations of the Federal, State or County laws. Costs incurred include but are not limited to sums spent in lieu of penalties, such as settlement agreements, mitigation, or remediation. Permittee shall complete post-work re-vegetation and stabilization of all disturbed soils, both within and outside of County's right-of-way, as required by DOT. When applicable, Permittee is required to comply with: 1. Section 404 of the Clean Water Act regulating dredging and filling of Waters of the United States and shall provide evidence of compliance to the County upon demand. 2. Section 1600 of the State of California Fish and Wildlife Code regulating work in streambeds and shall provide evidence of compliance to the DOT upon demand. 19. Safety and Health Provisions In addition to other specifications, definitions and provisions, Permittee is also hereby categorized and designated as the following types of employer for this project: • Exposing Employer—the employer whose employees are exposed to a hazard • Creating Employer—the employer who is creating a hazard • Controlling Employer— the employer who is responsible and who has the authority for ensuring that a hazardous condition is corrected • Correcting Employer—the employer who has the responsibility for correcting a hazard Permittee's Safety Officer(s) shall be certified as a competent person for controlling this project's workplace safety. Permittee's Safety Officer shall be on the site, at a minimum, each day that work is in progress or periodically, when work is not active, and shall have the authority to correct any safety violation. All workers exposed to traffic, work vehicles, or construction equipment in the County right of way shall wear high visibility safety apparel. 20. Trees A. Tree Protection Any underground work within the drip line of any trees in County right-of-way shall conform to the following requirements: 1. No roots over two inches in diameter shall be cut. 2. Hand trenching and tunneling will be required when excavation exposes roots two inches in diameter or larger. 3. Roots two inches in diameter or larger which are exposed to the air shall be kept moist by wrapping the root in a wet towel or blanket. 4. Roots two inches in diameter or larger which are accidentally damaged shall be treated by Permittee as directed by DOT. 5. If roots two inches in diameter or larger are cut or broken,the tree shall be trimmed by Permittee to compensate for the decreased root system as directed by DOT. 6. Manholes or boring pits shall not be installed within 20 feet of any tree trunk. B. Tree Removal No trees in County right of way shall be removed unless specifically authorized by DOT. If tree removal and/or trimming is authorized by DOT, Permittee will meet the following requirements: 1. Permittee shall submit and obtain DOT approval of Tree Removal/Tree Trimming Plan when required by DOT. Plan shall include name and qualifications of proposed tree removal contractor. 2. Permittee shall notify DOT 24 hours in advance of any tree trimming or tree removal. 3. Trees are not to be felled onto El Dorado County roads. 2025 Standard Conditions Encroachment Permit 20251030.docx Page 11 0113 4. When directed by DOT, Permittee shall grind stumps to six inches below grade. Other stumps are to be cut flush with ground. 5. All debris from tree removal and trimming shall be removed from the County right-of-way at the end of each work shift and disposed of by Permittee. 21. Indemnity To the fullest extent of the law,the Permittee shall defend, indemnify and hold the County of El Dorado harmless against and from any and all claims, suits, losses, damages and liability for damages, including attorney's fees and other costs of defense brought for or on account of injuries to or death of any person, including but not limited to, workers and the public, or on account of injuries to or death of the County of El Dorado employees, or damage to property, or damages proximately resulting from Permittee's work, operations, or performance hereunder, to the extent consistent with Permittee's County of El Dorado Franchise Agreement, regardless of the existence which are claimed or which shall in any way arise out of or be connected with Permittee's work, operations or performance hereunder, regardless of the existence or degree of fault or negligence on the part of the County of El Dorado, the Permittee, the contractors, subcontractors or employee of any of these, except the active, or sole negligence or willful misconduct of El Dorado County, its officers, employees, contractors, subcontractors or employee of any of these where expressly prescribed by statute. The duty to indemnify and hold harmless the County of El Dorado specifically includes the duties to defend set forth in Section 2778 of the Civil Code. The insurance obligations of the Permittee, and/or Contractor are separate, independent obligations under the Permit, and provision of this defense and indemnity are not intended to modify nor should they be construed as modifying or in any way limiting, the insurance obligations set forth in the Permit. 22. Insurance General Requirements-Permittee must procure and maintain and must require the Permittee's contractors to procure and maintain for the duration of the permit, insurance against claims for injuries to persons or damages to property which may arise from or in connection with the performance of the work hereunder and the results of that work by the Permittee, the Permittee's agents, representatives, employees or contractors. The Permittee must provide proof of a policy(s) of insurance satisfactory to the County of El Dorado before work begins. Permittee must not commence performance of this permit unless and until compliance with every requirement of the insurance provisions is achieved. Any failure to comply with the reporting provisions of the policies must not affect coverage provided to the County, its officers, officials, employees or volunteers. Coverage must be at least as broad as: A. Full Workers Compensation and Employers Liability Insurance covering all employees of the Permittee as required by law in the State of California. B. Commercial General Liability(CGL) Insurance of not less than One Million Dollars($1,000,000.00)combined single limit per occurrence for bodily injury and property damage, including but not limited to endorsements for the following coverage: Premises, personal injury, operations, products and completed operations, blanket contractual, and independent contractors' liability. Automobile Liability Insurance of not less than $1,000,000.00 is required in the event motor vehicles are used by the Permittee in performance of the permit. C. In the event Permittee is a licensed professional and is performing professional services under this contract, professional liability is required with a limit of liability of not less than One Million Dollars ($1,000,000.00) per occurrence. D. Explosion, Collapse and Underground coverage is required when the scope of work includes XCU exposures. For the purpose of this permit, XCU coverage is required. 23. Proof of Insurance Requirements A. Permittee must furnish proof of coverage satisfactory to the County of El Dorado as evidence that the insurance required herein is being maintained. The insurance will be issued by an insurance company acceptable to the County of El Dorado Risk Management Division or be provided through partial or total self-insurance likewise acceptable to the Risk Management Division. Before beginning work the Permittee shall provide the name, address, and telephone number of the nearest claims adjusting office of the company which has issued liability insurance. B. The County of El Dorado, its officers, officials, employees, and volunteers are included as additional insureds, but only insofar as the operations under this Permit are concerned. This provision shall apply to General Liability only. 2025 Standard Conditions Encroachment Permit 20251030.docx Page 12 of 13 Proof that the County of El Dorado is named additional insured shall be made by providing a certified copy, or other acceptable evidence, of an endorsement to Permittee's insurance policy naming the County of El Dorado additional insured. C. Certificates of insurance must meet such additional standards as may be determined by the DOT either independently or in consultation with the Risk Management Division, as essential for protection of the County D. If the Permittee cannot provide an occurrence policy, Permittee must provide insurance covering claims made as a result of performance of this Permit for not less than three (3) years following completion of performance of this Permit. E. Any deductibles or self-insured retentions must be declared to and approved by the County of El Dorado. F. The Permittee must require each of the Permittee's contractors to procure and maintain commercial general liability insurance, automobile liability insurance, and workers compensation insurance of the types and in the amounts specified above, or the Permittee must insure the activities of the Permittee's contractors in the Permittee's policy in like amounts. The Permittee must also require each of the Permittee's contractors to name the Permittee and County of El Dorado, its officers, officials, employees, and volunteers as additional insureds. 24. Insurance Notification Requirements A. Permittee must provide written notice to the County of El Dorado thirty(30)days prior to any cancellation or material change in any policy. Send the written notice to the County of El Dorado, Department of Transportation, Utility Encroachment Division, 2850 Fairlane Court, Placerville, CA 95667. B. Permittee agrees that the insurance required herein shall be in effect at all times during the term of this Permit. If the insurance coverage expires at any time or times during the term of this Permit, Permittee must provide, thirty (30) days prior to the expiration date, a new certificate of insurance as evidence of the insurance coverage herein provided. New insurance coverage must extend for the remaining of the term of the Permit. If the Permittee fails to keep in effect at all times insurance coverage as herein provided, County may, in addition to any other remedies it may have, terminate this permit upon the occurrence of this event. New certificates of insurance are subject to the approval of the Risk Management. 25. Appeal Process The appeal process for DOT encroachment permit requirements shall escalate to the following individuals, or successors: West Slope Tahoe Basin 1 Craig Newton Donaldo Palaroan, P.E. Program Manager- Encroachments Senior Civil Engineer 2 John Kahling, P.E. John Kahling, P.E. Deputy Director of Engineering Deputy Director of Engineering 3 Rafael Martinez Rafael Martinez Director of Transportation Director of Transportation The governing board of each utility agency has the right to appeal to the Board of Supervisors. No public utility will commence work encroaching upon the County's right-of-way unless it will comply with the encroachment permit conditions. If the public utility does not agree with the encroachment conditions, it can exercise its appeal right. 2025 Standard Conditions Encroachment Permit 20251030.docx Page 13 of 13 NOTES 1. SAWCUT OR GRIND EXISTING PAVEMENT PRIOR TO EXCAVATING AND PRIOR PAVEMENT RESTORATION, TYP , • 1I I EP or TO FINAL PAVEMENT RESTORATION. ALL SAWCUTS IF USED SHALL BE CONFORM LIMITS Gutter Lip TNEAT STRAIGHT LINES, EITHER PARALLEL OR PERPENDICULAR TO THE ROADWAY. NO SAWCUTSWILL BE ALLOWED IN WHEEL PATHS. LONGITUDINAL - -/�� Travel Lane - , SAWCUT LINES SHALL HALLBBE PLACED AT ROAD CL OR MIDDLE OF TRAVEL LANE. 2. PONDING OR JETTING IS NOT PERMITTED WITHIN THE ROADWAY, OR WITHIN A A A FIVE FEET (5') OF THE EDGE OF PAVEMENT. Road — dEl — Road 3. HOT MIX ASPHALT (HMA). TACK COAT EXISTING PAVEMENT PRIOR TO �/ PLACEMENT OF NEW HMA. MINIMUM HMA THICKNESS SHALL BE 3" OR I MATCH EXISTING, WHICHEVER IS GREATER. MAXIMUM HMA RESTORATION - �A . CL Travel Lane THICKNESS SHALL BE 6". REFER TO PERMIT FOR HMA MIX REQUIREMENTS. , / r TRENCH EP or 4. WHEN a. LESSGTHANH3": USE FULL DEPTH GRIND-OUT AND REPLACE WITH ALT THICKNESS IS: /�� �/�/ EXCAVATION, TYP /// Gutter Lip 3" HMA b. 3" OR GREATER: USE 2" GRIND AND OVERLAY HALF LANE, CENTERLINE CROSSING FULL LANE OR ROADWAY c. 6" OR GREATER: USE 3" GRIND AND OVERLAY PAVEMENT RESTORATION _ PAVEMENT RESTORATION 5. PIPE ZONE BACKFILL SHALL BE APPROVED BY THE UTILITY COMPANY AND COMPACTED TO 90% RELATIVE COMPACTION (RC). WIDTH (VARIES) 6. INTERMEDIATE BACKFILL TO BE AS FOLLOWS: L ► L a. SEWER / WATER LINES: BACKFILL TO CONSIST OF CLASS 2 AB. MATERIAL TO BE COMPACTED TO 95% RC. 8 f 12"-I.- 12"i 8 b. ALL OTHER UTILITY FACILITIES: BACKFILL TO CONSIST OF EL 4 PAVEMENT T-CUT T-CUT 3 HMA DORADO COUNTY DEPARTMENT OF TRANSPORTATION (DOT) GRIND/MILL 7 7 APPROVED CEMENT SLURRY MIXES. REFER TO DOT FOR APPROVED DEPTH CEMENT SLURRY MIXES AND PROVIDERS. ALTERNATE MIX DESIGNS MUST BE SUBMITTED TO DOT FOR APPROVAL PRIOR TO USE. • ♦♦♦♦♦ ♦♦ ♦♦ .♦♦.♦♦♦ ♦♦♦♦♦♦♦ ' n i.•.•.•.•.•.•.•.•.•.•♦•.•.AL AL AL•.•.� 7. T-CUT: A 12" WIDE FULL DEPTH T-CUT OF EXISTING PAVEMENT ON ALL \ u\ U" \ �\ i\ \�\ \ \ G' -'''' SIDES OF EXCAVATION IS REQUIRED AS PART OF THE PAVEMENT ;y \,R��\; 1?, �L, ,,, r\ --\-\ \% 1 \\,�1 „ , RESTORATION WORK ONLY WHEN: a. EXCAVATION TRENCH WIDTH IS 2' OR LESS AND CLASS 2 AB IS a USED AS INTERMEDIATE BACKFILL. 1 oi LIMITS OF GRIND & OVERLAY 8. A MINIMUM FINAL PAVEMENT RESTORATION LIMITS (L) OF 2 FEET IS 30" MIN. INTERMEDIATE II 91' REQUIRED BEYOND ALL SIDES OF THE TRENCH EXCAVATION. THIS LENGTH COVER BACKFILL ``, 1 INCREASES TO 10 FEET IN THE DIRECTIONS OF TRAVEL WITH A FULL WIDTH PAVE BACK OF THE AFFECTED TRAVEL LANES ON THE FOLLOWING ;%\- �C-x ROADWAYS: j a. CLASSIFIED AS MINOR COLLECTOR OR GREATER, OR 12" MIN. OR PER b. WITH SPEED LIMITS GREATER THAN 35 MPH, OR UTILITY COMPANY :• ',� c. WITH AVERAGE DAILY TRAFFIC (ADT) COUNTS GREATER REQUIREMENTS THAN 2000. M1 8. FINAL PAVEMENT RESTORATION LIMITS WITHIN 3 FEET OF THE EDGE OF1 . . ..: , . • PAVEMENT (EP) OR OF A PRIOR PATCH REQUIRE EXTENSION OF THE FINAL PAVEMENT RESTORATION LIMITS TO THE EP OR THE PRIOR PATCH LIMITS. 4" MIN. OR PER _ • (�F UTILITY COMPANY •' • . 9. REPLACE ALL OBLITERATED PAVEMENT MARKINGS. REQUIREMENTS Y •• •• • • �- 5 PIPE ZONE �_ , BACKFILL 10. REFER TO PERMIT FOR FURTHER CONDITIONS. !� ��Qr00 17,0�`�~ r. SECTION VIEW A-A APPROVED BY: STD Rafael Martinez T.E. No. 2549 DATE COUNTY OF EL DORADO l:°r+V�"l-� PLAN Department of Transportation ,rur h+,I-v��}� '4; Director of Transportation DEPARTMENT OF TRANSPORTATION ; 1, u UTILITY TRENCH DETAIL (((lt ' *'' UT-01 ' DATE :O,gC/Fp', Department of Transportation - County Engineer Stabilized Construction Entrance/Exit TC-1 • Crushed aggregate greater than 75 mm (3 in) but smaller than 150 mm (6 in) Filter fabric ///---Original / grade /�\ o �o o b0 O ,Q oQ t///' 300 mm (12 in) Min, unless otherwise specified by a soils engineer SECTION B—B NTS NOTE: rt Construct sediment barrier /-<-(L4.4\ 2 and channelize runoff to o, sediment trapping devicer !a B . < it.. ,,,,,.... ___--1 '\,, ,......,,.. • ____ 0_f *•id *ice...Ali i��/0�-It°An° iWa I t� rf.�/is it (21 o. . • �+ • %r�1a••• o 000�o.�•1�0•.11iko r;.i( Width as w .�+�*,•0+'irr•...; .•.o• .• c$xQ •• •s•� �+.� • required to s°�0•�1*/o."4.4'' ,•!' •i•! Cp •/••*!/••�*/� •• •!/ accomodate a_ may• •./++ •.f�•S .4• • s� o ;ItiLiezotiolyei, * �. • anticipatedcz .;1,1�.i. J •• 11*� ,.�,�/bw cp ) o . ce0�.41gi0v traffic „iv cn If t,,t r Temporary pipe culvert B as needed ( I., .. 15mMin or four times the circumference of the largest construction vehicle tire, Match whichever is greater Existing Grade PLAN NTS Stabilized Contraction Entrance/Exit (Type 1) • owCaltrans Storm Water Quality Handbooks Section 6 Construction Site Best Management Practices Manual Stabilized Construction Entrance/Exit TC-1 atl ruts, March 1,2003 3 of 4 CONSTRUCTION NOTES: T N 1. DRILLING AND BONDING DOWELS WITH EPDXY CARTRIDGES SIpEWA�4 E SHALL CONFORM TO THE DETAILS SHOWN ON THE PLANS 6' AND THESE SPECIAL PROVISIONS. N tK 2. THE DRILLED HOLES FOR #4 REBAR DOWELS SHALL BE SIDEt�A 5/8"NOMINAL BIT DIAMETER AND SHALL BE CLEANED IN 4 ✓ CONFORMANCE WITH THE MANUFACTURERS INSTRUCTIONS , \ AND SHALL BE DRY AT THE TIME OF PLACING THE FRB EPDXY CARTRIDGE BONDING MATERIAL AND THE STEEL G 0p J N DOWELS. DRILL HOLE & DOWEL EMBEDMENT DEPTH ifR c,>� SHALL BE 9"UNLESS OTHERWISE DIRECTED. GUT \` 3. THE BONDING MATERIAL SHALL BE A 2-COMPONENT ,�.- EPDXY SYSTEM CONTAINED IN A CARTRIDGE HAVING 2 r` SEPARATE CHAMBERS AND SHALL BE INSERTED INTO THE �� CLEANED HOLE USING A DISPENSING GUN AND REPLACEABLE MIXING NOZZLE APPROVED BY THE / � W MANUFACTURER. THE EPDXY CARTRIDGE SYSTEM USED \� \ SHALL BE APPROPRIATE FOR THE AMBIENT CONCRETE TEMPERATURE AND INSTALLATION CONDITIONS AT THE TIME OF INSTALLATION. SIDEWALK: #4 BARS X 18" 4. PREMOLDED EXPANSION JOINT FILLER SHALL BE FULL a , a (3 EA FOR 4' SIDEWALK DEPTH AND MUST COMPLY WITH ASTM D 1751. . ° �.!m?:`' "' 4 EA FOR 6' SIDEWALK) 5. CONCRETE MIX FOR CURB/GUTTER/SIDEWALK REPAIRS R 0 SHALL CONFORM TO CALTRANS STANDARD a SPECIFICATIONS SECTION 73 AND SHALL HAVE A MINIMUM CURB AND GUTTER -� 1/2" PREMOLDED EXPANSION OF 463LB/CU YD. OF CEMENTITIOUS MATERIAL CONTENT #4 BARS X 18" (3 EA) JOINT (5 SACK MIX). C 0 .d .. 6' SIDEWALK il —di #4 BARS X 18" (4 EA) cn E ROLLED OR VERTICAL -•. 4' SIDEWALK CURB AND GUTTER #4 BARS X 18" (3 EA) o. #4 BARS X 18" (3 EA) s' O —1 Et. i SCALE: NONE U OP�,90 CMG . z 144'A CURB, GUTTER AND SIDEWALK 3 *'✓'` " EPDXY DOWELING DETAIL ��i((�h. i 1 OF 1 °gt/Foa P 0 Dist COUNTY ROUTE POST ILES SHEET TOTAL TOTAL PROJECT NO. SHEETS C 3' ppOF E55,,,,REGISTERED CIVILENGINEER I August 1,2022 ce�i 1 MO PLANS APPROVAL DATE x THE STATE or CAL/FOY.VIA OR ITS OFFICERS WR�..fmL21 R AR AGENTS SHALL NOT BE RESPONSI&E FOR R, V. THE Ammo,OR LYMWLETEH SS OF SCRIMS LF Q.C,,yy0 COW/ES OF THIS PLAN SHEET. TABLE 1 TABLE 2 TABLE 3 TAPER LENGTH CRITERIA AND LONGITUDINAL BUFFER SPACE AND ADVANCE WARNING SIGN SPACING CHANNELIZING DEVICE SPACING FLAGGER STATION SPACING MINIMUM TAPER LENGTH MAXIMUM CHANNELIZING .* DISTANCE BETWEEN SIGNS* * DOWNGRADE Min D DEVICE SPACING ROAD TYPE N FOR WIDTH OF OFFSET 12 FEET (W) X Y Z 1I1I SPEED* Min D 0 ft ft ft 0 SPEED -3% -6% -9% hi(S) TANGENT MERGING SHIFTING SHOULDER URBAN - 25 mph OR LESS 100 _ 100 100 N 2L L L/2 L/3 TAPER TANGENT CONFLICT URBAN - MORE THAN 25 mph TO 40 mph 250 250 250 mph ft ft ft ft mph ft ft ft ft ft ft ft 20 115 116 120 126 URBAN - MORE THAN 40 mph 350 350 350 0 _RURAL 500 500 500 20 160 80 40 27 20 40 10 25 155 158 165 173 mi 25 250 125 63 42 25 50 12 30 200 205 215 227 EXPRESSWAY /FREEWAY 1000 1500 2640 30 360 180 90 60 30 60 15 35 250 257 271 287 *- The distances are approximate,are intended for guidance Z 35 490 245 123 82 35 70 17 40 305 315 333 354 purposes only,and should be applied with engineering judgment. 0 W 40 640 320 160 107 40 80 20 45 360 378 400 427 These distances should be adjusted by the Engineer for field CD 45 1080 540 270 180 45 90 22 50 425 446 474 507 conditions, if necessary,by increasing or decreasing the a 50 1200 600 300 200 50 100 25 55 495 520 553 593 recommmended distances. 55 1320 660 330 220 50 100 25 60 570 598 638 686 G 60 1440 720 360 240 50 100 25 65 645 682 728 785 65 1560 780 390 260 50 100 25 70 730 771 825 891 12 70 1680 840 420 280 50 100 25 75 820 866 927 1003 r 75 1800 900 450 300 50 100 25 * - Speed is posted speed limit,off-peak 85th-percentile Z speed prior to work starting,or the anticipated *- For other offsets,use the following merging taper length formula for L: operating speed in mph For speed of 40 mph or less,L =WS2/60 WW - Longitudinal buffer space or flogger station spacingmq For speed of 45 mph or more,L =WS m xxx - Use on sustained downgrade steeper than -3 percent Where:L = Taper length in feet and longer than 1 mile. W =Width of offset in feet S = Posted speed limit,off-peak 85th-percentile speed prior to work starting,or the anticipated operating speed in mph x*- Use for taper and tangent sections where there are no pavement markings or where there is a conflict between existing pavement markings and channelizers (CA). STATE OF CALIFORNIA DEPARTMENT OF TRANSPORTATION TRAFFIC CONTROL SYSTEM TABLES FOR LANE AND RAMP CLOSURES T9 Return to Table of Contents 1711 COM111 wrE Mat YIEES LI[Er VI —7 ior4 PMIES beer TOTAL S ri.i Sono CIVIL INEEe 1sy..., 4 COPE SPACING SEE TABLE 1 AND NOTE i J1 'A�Wl tr 2022•eSY4 OM = `ice.. t " 1 [•*a'sO II II • .1 • [.iu1.1 iI ix rweslet IS I [w %a'51 w(o•I/erll o M •t.1.e- S An R4'ORI. ADVANCE WARNING SIGN SEE TABLE 1 SEE TABLE 2 DISTANCE SEE TABLE 3 AND NOTE 1 A • • • • • • • • • • • • • • // // OC B A . _ I • •• •• •• i /// //R/E � 0 O• li • • l� 100'i0 150'Mln h— I _.L/3 C SEE NOTE 6 500' T CG k iliE TABLEN I ® LANE SEE ❑ SEE TABLE 3 NOTE_�—��❑ 0 L SEE NOTE 4 G20-2 B Al A K� ^ CLOSED0 ® SEE NOTE 3 N L^, C30(CA) W20-1 C20(CA)R W4-2R SEE NOTE 5 NOTES' y SEE NOTE 2 SEEAND NTOTES 2 SEE AND TOTES 2 TYPICAL LANE CLOSURE See Standard Plan TB for tables, 3) Use cone spacing X for taper segment,Y for tangent segment or Z for Z W conflict situations,as appropriate,per Table I,unless X,Y.or 2 cone O spacing is shown on this sheet. D Provide of least one person to continuously maintain traffic control devices 2 for lane Closures. 0, I- r a LEGEND SIGN PANEL SIZE (Min) Z • TRAFFIC CONE �A 48"x 48" 0 TRAFFIC CONE (OPTIONAL TAPER) Q 36"x 18" ,,�N J © JO"x 30" I. TEMPORARY TRAFFIC CONTROL SIGN NOTES: Ha FLASHING ARROW SIGN (FAS) ' I.Portable delineators placed of one-half the spacing fndicoteo 5.Place C30(CA)"LANE CLOSED"sign at 500' to 1000' Intervals for traffic cones may be used instead of cones for ooytime throughout extended work area. loss FAS SUPPORT OR TRAILER closures only. 6.Length may be reduced by the Engineer to address site conditions. ��� PORTABLE FLASHING BEACON 2.Each advance warning sign shall be equipped with of least two �I� flogs for daytime closure.Each flag shall be at least 16"x 16" T.Median lone closures shall conform to the details shown in size and shall be orange or fluorescent red-orange In color. except that C2OICA)L and W4-2L signs shall be used. Flashing beacons shall be placed at the locutions indicated for lone closure during hours of darkness. 8.For approach speeds over 50 MPH,use the "Traffic Control System for Lane Closure on Freeways and Expreeewoys' plan for lane 3.A G20-2"END ROAD WORK"sign shall be placed at the end of closure details and requirements. STATE OF CALIFORNIA the lone closure unless the end of work ores is obvious or DEPARTMENT OF TRANSPORTATION ends within the larger project's limits. 4. A minimum 1500'of sight distance shall be provided where TRAFFIC CONTROL SYSTEM possible for Vehicles ching the first flashing arrow sign. FOR LANE CLOSURE ON Lone Closures shall nott begin at the top of crest vertical curve or on a horizontal Curve, MULTILANE CONVENTIONAL HIGHWAYS NO SCALE I T11 Return to Table of Contents Dist COUNTY ROUTE POST MILES SHEET TOTAL TOTAL PROJECT NO. SHEETS NOTES:See Standard Plan 79 for tables. C n n ,P REGISTERED CIVIL GINEER e•''s,ON Use cone spacing X for taper segment,Y for tangent segment or Z for 4 M1 conflict situations,as appropriate,per Table 1,unless X,Y,or Z cone »t�mriea o.wazx ° spacing is shown on this sheet. August 1,2022 C4I029 I2 PLANS APPROVAL DATE Provide at least one person to continuously maintain traffic control TOE STAFF OF CALIR'RNIA Of ITS OFFICERS R '.'3"31-24M46EN/S SNA[L NOT BE RESPON5I&E FOR CIVIL devices for lane closures. THE ACOIRAC,OA IMPLETEM1ESS OF SCAM. LFa.,µ ' ttW/ES OF MIS PLAN SKEET. Rumble Strip Arrays required on El Dorado County SEE NOTES roadways>_45 mph (Rural Unposted) SEE NOTE 2 SEE NOTE 2 SEE NOTE 2 2 AND 8 W3-4 C9A(CA) W20-4 C45(CA) W20-1 BE ROAD PREPARED RUMBLE OR SEE NOTE 3 TO NEW STRIPS AHEAD G20-2 PORTABLE TRANSVERSE STOP ziii RUMBLERIP ARRAYS ❑A ❑A ❑A (SEEC29(CA) SEE NOTES © XXX FT AND 4 CONE SPACING -' SEE TABLE 1 AND NOTE 1 _ J �E ORZ i� • • • • • N a ADVANCE WARNING SIGN DISTANCE SEE TABLE 3 D GATE CONES N C B I B B A A/2 SEE TABLE 2 110 OPTIONAL NOTE 7 T • •—• L• T • �• • T % 4• • T • •—• . A/2 A — —.I B .I B /, B C 0 • f j////// ri ADVANCE WARNING SIGN ISTANC SEE TABLE 3 GATE CONES __,,,SEE / WORK AREA • is,• .;. • . •. Cxl trOR. 1 Ib0'Mn,i RUMBLE LSTRE IP TRANSVERSE F I111 100'TO 1 ❑A C9A(CA) W3-4 SEE NOTE 6 33 (SEE DETAIL) lo C,J ❑A .,W 12"TO 13" ROAD RUMBLE ONE i,V /REPAREI LANE JPP WORK RDAD ® / \ 00'TQ CLOSED/ 6'TO 10'_/ AHEAD STRIPS AHEAD �� �/ 150 ❑ J G20-2 12 TOP B SEE NOTE 3 020-1 C45(CA) W20-4 C29(CA) C30(CA) �Z' 30 SEE NOTES SEE NOTE 2 SEE NOTE 2 lXXX FTI SEE NOTE 2 SEE NOTE 5 4ti0 ��J 2 AND 8 ITSEE NOTES =� o �� Z NOTES: z AND 4 -4 1. Portable delineators placed at one-half the spacing indicated i for traffic cones may be used instead of cones for daytime t LEGEND W — closures only. 5/e"TO Y4" • TRAFFIC CONE 2. Sign must be equipped with at least two flags for daytime closures. PORTABLE TRANSVERSE F TEMPORARY TRAFFIC CONTROL SIGN Flags must be orange in color and at least 16 inches by 16 inches in size. Place flashing beacons as shown for closures during hours of darkness. RUMBLE STRIP ARRAY DETAIL PORTABLE FLASHING BEACON 3. A G20-2 "END ROAD WORK"sign,shall be placed at the end of the lane closure unless the end of work area is obvious SIGN PANEL SIZE (Min) or ends within the larger project's limits. Ilt FLAGGER 4. An optional C29(CA)sign may be placed below the C9A(CA)sign. ❑A 48"x 48" AUTOMATED FLL,,AGGER ASSISTANCE 5. Place C30(CA)"LANE CLOSED"sign at 500' to 1000' intervals �B 30"x 30" DEVICE (AFAD) throughout extended work area.They are optional if the work © 36"x 18 area is visible from the flogger station. STATE OF CALIFORNIA ❑D 36"x 42 DEPARTMENT OF TRANSPORTATION 6. Length may be reduced by the Engineer to address site conditions. �E 20,x 7" TRAFFIC CONTROL SYSTEM 7. Either traffic cones or barricades shall be placed on the taper. Barricades shall be Type I,II,or O. WITH REVERSIBLE CONTROL ON 8. If C45(CA) is not used,measure distance C from W20-4. TWO LANE CONVENTIONAL HIGHWAYS NO SCALE T13 6-24-22 Return to Table of Contents California MUTCD 2014 Edition Page 1150 (FHWA's MUTCD 2009 Edition,including Revisions 1&2,as amended for use in California) Figure 6H-6. Shoulder Work with Minor Encroachment (TA-6) Modified ab3HV 1 END )1210M ROAD WORK G20-2 0dOa (optional) W20-1 NOTE: All advance warning sign spacing, 0 1130 24X24"Barricade Taper Lengths, channelizing device's and moon ted, placed the Buffer spacing shall be per Caltrans Standard streetrl ZO'apart 72hrs Specifications Tables for Lane&Ramp closures T-9 prior to the start of work. A TOW-AWAY ZONE DATE: TIME: 4 a Vehicles parked in the shoulder area IT must be more than 2 feet from the "----71 edge stripe at the closest point. 1 ill 1EL DORADO COUNTY Y E- DEPARTMENT OF TRANSPORTATION ; � a E r Work vehicle ,,,, ,c.3 E? n VI A c 7, -' t0 • -.7. Truck-mounted ! �, o attenuator SHOULDER 1:3Fah r± ::i 12E _ is MIN. Buffer space�� R G� ' i". �� �.I i + (optional) -A PI 5 P,r g ._. C30A(CA) 'Ni iw E a � A 7 113N `�' ` t' - (/ SHOULDER i `g c F \ CLOSED / v i' W21-5a A W20-1 G20-2 t )IaoM od0a ROAD ON3 '*' WORK AHEAD (optional) Typical Application 6 Chapter 6H-Typical Applications November 7,2014 Part 6-Temporary Traffic Control California MUTCD 2014 Edition Page 1177 (FHWA's MUTCD 2009 Edition,including Revisions 1 &2,as amended for use in California) Figure 6H-18. Lane Closure on a Minor Street (TA-18) Modified tyOlE4) ,sv1Hv PV' Standard: 1. Where vehicular traffic cannot effectively self-regulate, (do)VdU one or two flaggers shall be used. 2. During work hours,at least one worker shall be assigned . • Alk —' the responsibility to escort traffic through the work zone. A worker assigned this responsibility may also participate V in other construction activity;however,the assigned worker shall be aware of his/her responsibilities for providing + traffic control. �/" / —Work vehicle(optional) VIP 'a1,—, r 4illlllin`, Truck mounted attenuator(optional) la oPAO Gri y I ' a .4 g Buffer space ' y in � r(ontional) ai E., G' R30 24X24"Barricade El _5'' 7 j 0.I mounted,placed the to Id 1i �street 20'apart 72hrs % P �Zj 6 4 prior to the start of work. a. G b tipP gl I j �i gppE11�� a , :_ Gy J F$9(��„�Yi �Q , �y CJ G1� {Y . I rA Vigil . . 61 ref ® aste IIIi1 ' i Q • rzi 4 t i , ,_ CQA(C ii d, /' NOTE: Al!advance warning sign spacing, Typical Application 18 Taper Lengths, channelizing device's and Buffer spacing shall be per Caltrans Standard November 7,2014 Specifications Tables for Lane&Ramp closures T-9 7. Geotechnical Report, CME 2026 Pioneer Trail Waterline Project(Rebid) DRAFT RIPPABILITY STUDY NEEDLE PEAK ROAD, WILDWOOD AVENUE, AND PIONEER TRAIL WATER MAIN REPLACEMENT SOUTH LAKE TAHOE, CALIFORNIA re-7:71E . ..)! ' ' ii 481. :pi i 1._ Otr • '.� "! 1 t' 0' a . • CONSTRUCTION lir --- CME MATERIALS = / ENGINEERS, INC. v." - - „AI.. ,. - ---ifii. 4 :AL ° li . ttiiiir, i d r, , PREPARED FOR: SOUTH TAH0t (.4114011 464,---' UTILITY D'SS°G DECEMBER 2025 FILE: 4036 CONSTRUCTION CME MATERIALS ENGINEERS INC. 300 Sierra Manor Drive, Suite 1 Reno NV 89511 December 30, 2025 File: 4036 Laura Hendrickson, PE South Tahoe Public Utility District (STPUD) Iendrickson@stpud.us Ph. (530) 544-6474 ext. 6260 Cell. (408)458-0366 RE: DRAFT Rippability Study Needle Peak Road, Wildwood Avenue, and Pioneer Trail Water Main Replacement South Lake Tahoe, California Dear Ms. Hendrickson, Construction Materials Engineers Inc. (CME) is pleased to submit the results of our Rippability Study for the Needle Peak Road, Wildwood Avenue, and Pioneer Trail Water Main Replacement project located in South Lake Tahoe, California. The following report transmits the results of our field exploration and geophysical interpretation, and provides general recommendations for the project. Thank you for the opportunity to provide our services and we look forward to working on future endeavors together. Please contact the undersigned if you have any questions or require additional information. Sincerely, CONSTRUCTION MATERIALS ENGINEERS, INC. Nicholas R. Anderson, PE, GE Launie McRoberts, PE (NV) Geotechnical Project Manager Project Engineer nanderson@cmenv.com Imcroberts@cmenv.com Direct: 775-737-7578 Office: 775-851-8205 Cell: 916-705-1959 Cell: 775-378-3133 NRA:LAM:lam \\dcfs\data\projects\projects\active\4036\report\draft\draft rippability study-needle peak,wildwood,and pioneer water main replacement.docx CONSTRUCTION CME MATERIALS \\DCFS\Data\Projects\Projects\Active\4036\report\Draft\DRAFT Rippability Study-Needle Peak,Wildwood, and Pioneer Water Main Replacement.docx ENGINEERS, INC, TABLE OF CONTENTS 1.0 INTRODUCTION 1 2.0 PROJECT AND SITE DESCRIPTION 1 2.1 Project Description 1 2.2 Site Description 2 3.0 SUBSURFACE EXPLORATION 2 4.0 GENERAL SUBSURFACE SOIL PROFILE ENCOUNTERED 3 5.0 DISCUSSION 4 5.1 Geotechnical Considerations 4 6.0 LIMITATIONS 5 FIGURES Figure 1: Approximate Needle Peak and Wildwood Avenue Trail Study Boundary (shown in red) 1 TABLES Table 1: Pipeline Alignment 2 Table 2: Excavation Characteristics Based on P-Wave Velocity 3 Table 3: Geotechnical Considerations 4 APPENDICES APPENDIX A Plate A-1 a— Exploration Location Map (Needle Peak and Wildwood Avenue) Plate A-1 b— Exploration Location Map (Pioneer Trail) APPENDIX B Plate B-la—B-1 i—Seismic Refraction Testing Results CONSTRUCTION CME MATERIALS \\DCFS\Data\Projects\Projects\Active\4036\report\Draft\DRAFT Rippability Study-Needle Peak,Wildwood, II and Pioneer Water Main Replacement.docx ENGINEERS, INC. DRAFT — RIPPABILITY STUDY Needle Peak Road, Wildwood Avenue, and Pioneer Trail Water Main Replacement South Lake Tahoe, California 1.0 INTRODUCTION Presented herein are the results of Construction Materials Engineers, Inc. (CME) geophysical field exploration and associated recommendations for the proposed Needle Peak Road, Wildwood Avenue, and Pioneer Trail Water Main Replacement project to be located in South Lake Tahoe, California. The primary objective of this study was to identify areas that may experience difficult excavation, require ripping, or require blasting along the water main alignment. Results of the subsurface investigation and details of the project as described in this report, form the basis for all conclusions and geotechnical recommendations contained herein. 2.0 PROJECT AND SITE DESCRIPTION 2.1 PROJECT DESCRIPTION STPUD will be performing a water main replacement project in South Lake Tahoe, California in the Needle Peak Road and Wildwood Avenue region and along Pioneer Trail. The proposed water main replacement alignment (Needle Peak Road and Wildwood Avenue) is outlined in red in Figure 1 below. The maximum excavation depth is anticipated to be on the order of 5-feet or less. • • co \ ‘Ne d J �0 co 0,e \ �� ,A44A1 \\/2 4040\0 • Ic r , \ • • , • Vy . Figure 1: Approximate Needle Peak and Wildwood Avenue Trail Study Boundary (shown in red) CONSTRUCTION CME MATERIALS \\DCFS\Data\Projects\Projects\Active\4036\report\Draft\DRAFT Rippability Study-Needle Peak,Wildwood, 1 and Pioneer Water Main Replacement.docx ENGINEERS. INC. 2.2 SITE DESCRIPTION The proposed water main alignments are located within South Lake Tahoe right-of-way, along existing roadway easements. Refer to Plates A-1 and A-2 in Appendix A for the proposed alignments.Table 1 below describes the roadways where the alignments will be located. Table 1: Pipeline Alignment Roadway Description Needle Peak Road Two lane paved minor arterial road with sections of local road. High traffic volumes. Wildwood Avenue Two lane paved minor arterial road with sections of local road. High traffic volumes. Donner Avenue Two lane paved local road Knoll Lane Two lane paved local road Terrace Drive Two lane paved local road Lucinda Court Two lane paved local road Overlook Court Two lane paved local road Timber Lake Place Two lane paved local road Logroad Place Two lane paved local road Pioneer Trail Two lane paved minor arterial road. High traffic volumes. 3.0 SUBSURFACE EXPLORATION To assess the potential excavatability' or rippability2 of the subsurface materials along the proposed alignments, geophysical testing was performed in the field using the Refraction Compressional Wave (p- wave)technique in general accordance with the method described in ASTM D5777. Seismic compressional wave geophysical testing provides a general shallow subsurface profile characterization. The DAQlink 4 24-bit acquisition system (Seismic Source) utilizing a multichannel geophone cable with 12 geophones, placed at an approximate spacing of 3-feet,was used to obtain compressional wave data which was then analyzed to obtain a p-wave vertical profile. Vertical geophones with resonant frequencies of 10 Hz measure p-wave energy produced from sledgehammer blows on a strike plate completed at multiple strike locations across the geophone array. Measurements of the waves triggered by the hammer strikes are recorded for 0.5 seconds at 0.125 millisecond sample intervals. A total of sixteen (16) refraction lines were performed: • Two (2)successfully performed with reliable results along Pioneer Trail • One (1) performed with unreliable results along Pioneer Trail (interpreted results are omitted from this report) • Seven (7)successfully performed with reliable results in the Needle Peak and Wildwood Avenue area • Six(6) performed with unreliable results in the Needle Peak and Wildwood Avenue area (interpreted results are omitted from this report) Excavatability is a measure of the difficulty to remove earthen materials using conventional equipment such as a trackhoe with conventional bucket. 2 Rippability is a measure of the ease with which earthen materials(i.e.,rock)can be broken by mechanical ripping equipment to facilitate removal by other equipment. CONSTRUCTION CME MATERIALS \\DCFS\Data\Projects\Projects\Active\4036\report\Draft\DRAFT Rippability Study-Needle Peak,Wildwood, 2 and Pioneer Water Main Replacement.docx ENGINEERS. INC. The refraction lines that yielded unreliable data and results were tested twice, at different dates and times, with no success. Therefore, these results were omitted from this report. The data was unreliable due to the amount of road traffic and ambient noise. Locations of the refraction lines are presented on Plate A-1 a and Plate A-1 b in Appendix A; geophysical test results are presented on Plates B-la through B-1 i. To assess estimated excavatability of soil and rippability of bedrock, CME reviewed the Caterpillar Handbook of Ripping 12th Edition and utilized the generalized seismic velocity tables from D8R ripper performance. The following table provides a general summary of the estimated excavation characteristics for a given p-wave velocity range: Table 2: Excavation Characteristics Based on P-Wave Velocity Estimated Earthen Material Typical P-Wave Excavation/ Corresponding Equipment Type Velocity Range (fps) Rippability Type Characteristic Soil / Residual < 3,000 Excavatable 20 to 30 ton Excavator Bedrock Moderately Weathered Granitic 3,000—6,000 Rippable D8 dozer with single/multi- Bedrock shank ripper Slightly Weathered to Marginally Rippable D8 dozer with single-shank Fresh Granitic >6,000 to Blasting Required ripper and hydraulic breaker Bedrock NOTES: 1. Rippability of a material is dependent on the fracturing,laminations,bedding,and weathering patterns.Geophysical testing provides a generalized profile rippability which should be confirmed using an excavator or other ripping equipment. 2. Soil profiles may be excavatable, however; large boulders and cobble conflicts may make excavations slow and cumbersome. Based on the geophysical testing performed and corresponding borings, bedrock at the site may be located within a few feet of or at the ground surface. Higher p-wave velocities of more than 6,000 feet per second are generally located at depths of more than 10 feet below existing ground surface (bgs) with p-wave velocities of more than 3,000 feet per second generally located at depths of 2 to 8 feet bgs. 4.0 GENERAL SUBSURFACE SOIL PROFILE ENCOUNTERED Based on a review of the South Lake Tahoe Folio, Geologic Map (Bonham and Burnett, 1976), the project area is mapped as decomposed granodiorite with localized corestones of granodiorite bedrock. Based on the surface materials observed during exploration and the results of the geophysical testing, it is anticipated that subsurface materials are consistent with the geologic map with various zones of thick, residual soils and alternating shallow, moderately weathered to fresh granitic to granodioritic bedrock. In general, most of the subsurface exploration displays difficult excavation, requiring ripping and potential blasting or rock sawing. Most of the locations were placed in relatively flat or constant grade areas in the shoulder of the existing roadways. These areas may underrepresent the presence of shallow bedrock. Abundant corestone bedrocks were observed along the alignment. It should be anticipated that significant variability of subsurface materials will be encountered along the alignment. CONSTRUCTION CME MATERIALS \\DCFS\Data\Projects\Projects\Active\4036\report Draft\DRAFT Rippability Study-Needle Peak,Wildwood, 3 and Pioneer Water Main Replacement.docx ENGINEERS. INC. 5.0 DISCUSSION 5.1 GEOTECHNICAL CONSIDERATIONS Table 3 provides a general summary of our findings based on the subsurface exploration and provides generalized recommendations for addressing excavation of the proposed water mains. Table 3: Geotechnical Considerations Subject Geotechnical Considerations Areas Locations likely to require drilling and blasting, rock sawing, or extremely difficult ripping Requiring were encountered (see Plate B-1 c). It is anticipated that most of the regions that will Blasting or require drilling and blasting, rock sawing, or extremely difficult ripping will be located in Rock Sawing high points or areas in close proximity to bedrock outcrops, particularly when the proposed pipe is located on the side of the road adjacent to the outcrop. Most of the proposed alignment is anticipated to be marginally excavatable to requiring ripping. Based on the geophysical testing, shallow bedrock at the proposed depths of Marginally water main installation are generally moderately weathered, with varying degrees of Excavatable weathering. It should be anticipated that most of the alignment will consist of difficult to Rippable excavation. Resistant zones requiring ripping or difficult excavations are anticipated to Areas be located in high spots or locations near bedrock outcrops, particularly where the outcrops display moderate weathering and evidence of grus(decomposed granite) in the surrounding areas. The areas requiring ripping will be in close proximity to the areas requiring blasting, rock sawing, or extremely difficult ripping. Areas generally considered excavatable using traditional equipment(trackhoe, standard Areas bucket, etc.) were encountered infrequently in isolated areas along the proposed Excavatable alignments. In general, these excavatable areas were limited to locations with fill, with roadway embankments, or low spots in topography. Frequently, the difficulty of Traditional excavation is dependent on the direction of the roadway the alignment is proposed, Equipment where the downslope, fill side is anticipated to be excavatable with the uphill, shallow bedrock side potentially requiring ripping and blasting. It should be noted that the exploration performed for the project was limited and intended Limitations to provide preliminary information on the subsurface materials along the proposed alignments.Zones significantly differing from the information presented in this report may be possible, due to the limited extent of exploration. Based on conversations with STPUD, the project timeline does not allow for further Future exploration. If it is determined that more in-depth identification of subsurface materials or Investigation further delineation of excavation characteristic zones is required, additional subsurface investigation consisting of geotechnical test pits or vertical borings are recommended. This report shall be reviewed by both the design team and the contractor to ensure that the geotechnical findings and recommendations are clearly understood, incorporated into General the design documents, and implemented during construction. In the event of any conflict Information between the recommendations in this report and the project plans or specifications, our office shall be contacted for clarification prior to construction activities in the affected area. CONSTRUCTION CME MATERIALS \\DCFS\Data\Projects\Projects\Active\4036\report Draft\DRAFT Rippability Study-Needle Peak,Wildwood, 4 and Pioneer Water Main Replacement.docx ENGINEERS. INC. 6.0 LIMITATIONS This report has been prepared in accordance with generally accepted local geotechnical practices.The conclusions and recommendations of this report are provided for the design Exploration and construction of the proposed project as described in this report. The analyses and recommendations contained herein are based upon field exploration locations included on Location and Plate A-1. Geologic Variations Exploration locations included as part of this report should be considered accurate only to the degree implied by the methods used. This report does not reflect soil, rock, or groundwater variations that may become evident during the construction period, at which time re-evaluation of the recommendations may be necessary. The intent of this report is to provide geotechnical information related to construction and design of the project. The owner/project manager is responsible for distribution of this report to all designers and contractors whose work is affected by geotechnical General Intent recommendations provided. In the event of changes in the design, location, or ownership and of the project prior to construction, our recommendations should be reviewed by our Information geotechnical representative. Distribution If our engineer is not accorded the privilege of making this recommended review,the CME can assume no responsibility for misinterpretation or misapplication of his recommendations or their validity in the event changes have been made in the original design concept without our prior review. CME makes no other warranties,either expressed or implied,as to the professional advice provided under the terms of this agreement and included in this report. Any use, reliance Warranties on, or decisions, which a third party makes based upon the information contained in this report, are the sole responsibility of such third parties. CME accepts no responsibility for damages, if any, suffered by any third party as a result of decisions made or actions based on this report. Clay soils may be present in discontinuous areas below the proposed improvements. Clay soils may potentially shrink or swell (volume changes) in response to changes in the moisture content of the soil. Moisture changes in these soils can occur as a result of Clay Soil seasonal variations in precipitation, poor site drainage, landscape irrigation, leaking underground pipes, capillary action, or from other sources. Volume changes in clay soils can cause differential movements in structural elements constructed in the sphere of influence or bearing on the clay soil. The project geotechnical engineer shall be notified where questionable soils are encountered. Standard All structures are susceptible to deterioration caused by environmental and human-made Owner factors. Consequently, regular monitoring and maintenance are essential to prevent Maintenance/ damage and deterioration. The owner bears the sole responsibility for carrying out these monitoring and maintenance activities. CME, Inc. assumes no responsibility for such Monitoring issues or any resulting damages. Environmental Any evaluation of the site for the presence of surface or subsurface hazardous substances Hazards is beyond the scope of this study.When suspected hazardous substances are encountered Evaluation during routine geotechnical investigations, they are noted in the exploration logs and reported to the client. Please be aware that our exploration and analysis are bound by the constraints inherent in the scope of our investigation and the available data. Unmapped faulting, which is common in California, may remain unidentified or uncharted due to various factors, Fault Hazards including the scale of published mapping, sediment coverage, depth within the earth, or a lack of prior study. Detection often relies on advanced techniques such as seismology, LiDAR, orthophoto review, and onsite exploration outside the parameters of our study. Should you desire a site-specific fault study, we recommend consulting our office or a qualified fault investigation specialist for further analysis. CONSTRUCTION CME MATERIALS \\DCFS\Data\Projects\Projects\Active\4036\report Draft\DRAFT Rippability Study-Needle Peak,Wildwood, 5 ENGINEERS. INC. and Pioneer Water Main Replacement.docx APPENDIX A CME Refraction 5 Refraction 6 Refraction 4 Refraction 7 / Refraction 3 SPN Refraction 2 1 Refraction 13 - Refraction 9 Refraction 12 Refraction 8 Refraction 11 SCALE 1"-300 Refraction 10 300 150 0 150 300 a J W Ct o -1 CONSTRUCTION SOUTH TAHOE PUBLIC UTILITIES DISTRICT (STPUD) LEGEND PLATE CME MATERIALS NEEDLE PEAK DRIVE/WILDWOOD AVENUE WATER LINE APPROXIMATE REFRACTION LINE LOCATION NENGINEERS INC. EXPLORATION LOCATION MAP APPROXIMATE REFRACTION LINE LOCATION(EXCLUDED) A- 1 a 300 Sierra Manor Drive, Suite 1 SOUTH LAKE TAHOE, CALIFORNIA Reno, NV 89511 PROJECT NO.:4036 DATE:12/10/2025 Refraction 14 Refraction 15 Refraction 16 SCALE 1"-150' 150 75 0 75 150 a J W m U O CONSTRUCTION SOUTH TAHOE PUBLIC UTILITIES DISTRICT (STPUD) LEGEND PLATE CMEMATERIALS PIONEER TRAIL APPROXIMATE REFRACTION LINE LOCATION NENGINEERS INC. EXPLORATION LOCATION MAP APPROXIMATE REFRACTION LINE LOCATION(EXCLUDED) A- 1 b 300 Sierra Manor Drive, Suite 1 SOUTH LAKE TAHOE, CALIFORNIA Reno, NV 89511 PROJECT NO.:4036 DATE:12/10/2025 APPENDIX B CME Distance. ft 0 5 10 15 20 25 30 35 0 __ . . I . . . . . . . . . . . . . I . . . , . . I I I . l { 0 illillboik , SOIL (LOOSE TO DENSE), `0 o -15 w cc CL ;�ipu Iv -- 4 MODERq E ? �- ? Lr W Eq rHE _ C� SLIGHTLY WEATHERED TO FRESH BEDROCK 1 , , EXCAVATABILITY DELINEATION 5 10 15 20 __ EARTHEN MATERIAL P-WAVE VELOCITY EXCAVATION Distance. ft CLASSIFICATION RANGE(FPS) CHARACTERISTIC"" SOIL(LOOSE TO DENSE) <3,000 EXCAVATABLE T —i_ - I MODERATELY 3,000-6,000 RIPPABLE IV N C,) Ca A A 01 Cn rn CD Co Co Co CD —, WEATHERED BEDROCK o al O Cn O Cn O Cn O Cn O Cn O Cn O Cn O Cn O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SLIGHTLY WEATHERED MARGINAL TO 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TO FRESH BEDROCK >6,000 a O NON-RIPPABLE w X-AXIS LAT/LONG OFt _ 39Ft ""REFERENCE: HANDBOOK OF RIPPING 12TH EDITION, BY CATERPILLAR, 6 COORDINATES 38.94017180°,-119.94576413° 38.94010724°,-119.94568865° RIPABILITY ESTIMATES USING D8R AND D9R RIPPER PERFORMANCE o — P-wave Velocity, ft/s IIM CONSTRUCTION SOUTH TAHOE PUBLIC UTILITIES DISTRICT (STPUD) LEGEND PLATE MATERIALS NEEDLE PEAK, WILDWOOD, AND PIONEER TRAIL ---ANTICIPATED MAXIMUM EXCAVATION DEPTH ENGINEERS INC. REFRACTION LINE ONE (1) B- 1 a 0300 Sierra Manor Drive, Suite 1 SOUTH LAKE TAHOE, CALIFORNIA Reno, NV 89511 PROJECT NO.:4036 DATE:12/10/2025 Distance. ft 0 5 10 15 20 25 30 35 1 1 I 1 1 i 1 SOIL (LOOSE TO DENSE) ' 0 , 0 - c .Z� � c O 0 �'�/ MODERATELY WEATHERD BEDROCK ?� _ a) -5 ./ ICY -5 a w _/ ? �- ` w > •/ > co a) - 2500 -- CC 50 U ? C 9 _ 800 i�� CC o .00 — s , - -10- • • I 7000 -10 a • • — 8000 7000 -- A , . . . — f — 9000 - 8000 — SLIGHTLY WEATHERED TO FRE WBEDROC IF , "ill -15 agli - --15 0 5 10 15 20 25 30 35 Distance. ft EXCAVATABILITY DELINEATION EARTHEN MATERIAL P-WAVE VELOCITY EXCAVATION MilirliPF ' CLASSIFICATION RANGE(FPS) CHARACTERISTIC"" I I I SOIL(LOOSE TO DENSE) <3,000 EXCAVATABLE N N CA) CO A A U1 Ul Cr) O --,1 —1 co co CD CD O U1 0 U1 O Ul 0 Ul O U1 O U1 O U1 O 01 O 01 C MODERATELY O O 0 O 0 O O 0 0 O 0 0 0 0 O 0 0 O C WEATHERED BEDROCK 3,000-6,000 RIPPABLE O COD O O O O O O O O O O O O O O C 3 C- SLIGHTLY WEATHERED >6,000 MARGINAL TO TO FRESH BEDROCK NON-RIPPABLE w X-AXIS LAT/LONG oFt 39Ft ""REFERENCE: HANDBOOK OF RIPPING 12TH EDITION, BY CATERPILLAR, -15 m COORDINATES 38.94108914°,-119.94125908° 38.94112900°,-119.94113935° P-wave Velocity, ft/s RIPABILITY ESTIMATES USING D8RAND D9R RIPPER PERFORMANCE 0 M CONSTRUCTION SOUTH TAHOE PUBLIC UTILITIES DISTRICT (STPUD) LEGEND PLATE a)ME MATERIALS NEEDLE PEAK, WILDWOOD, AND PIONEER TRAIL ---ANTICIPATED MAXIMUM EXCAVATION DEPTH g ENGINEERS INC. REFRACTION LINE FIVE (5) B- 1 b 0 300 Sierra Manor Drive, Suite 1 SOUTH LAKE TAHOE, CALIFORNIA Reno, NV 89511 PROJECT NO.:4036 DATE:12/10/2025 Distance. ft 5 10 15 20 25 30 35 - - I - - . . I - - - - - - - - - I - I - - - - I - I_.,........000111011111111.11111111111- i 00 o SOIL (LOOSE TO DENSE) 0 MODERATELY WEATHERED BEDROCK_ — — — — — — _ — - �- _ _ _ — — — / -5 4000 ? 4000 0 . - - 5000 0 ? / 79 0 - aa) D . : : : — -- - 8 1-11DD w > 7000 SLIGHTLY WEATHERED TO FRESH BEDROCK Iw � u -10 8000 -10 cc a3 9000 a) Et P- 9000 -15 -1 -20 I ',)r 0 10 15 20 25 EXCAVATABILITY DELINEATION Distance, ft EARTHEN MATERIAL P-WAVE VELOCITY EXCAVATION CLASSIFICATION RANGE(FPS) CHARACTERISTIC"" SOIL jI (LOOSE TO DENSE) _<3,000 EXCAVATABLE P711P1 1 I 1 I - - --- 110 N) N) CC) co . A CP CJ1 (3) (3) --,l v Co Co CO CO -k MODERATELY 3,000 6,000 RIPPABLE O 01 0 U1 O CJ1 0 U1 0 CJ1 0 CJ1 0 C.J1 0 U1 0 CJ1 0 WEATHERED BEDROCK O 0 O O O O O O O O O O O O O O O O 0 O O O O O 0 O O O O O O O O O O O O 00 ,000 SLIGHTLY WEATHERED >6 MARGINAL TO TO FRESH BEDROCK NON-RIPPABLE a w X-AXIS LAT/LONG OFt 39Ft ""REFERENCE: HANDBOOK OF RIPPING 12TH EDITION, BY CATERPILLAR, -5 COORDINATES RIPABILITY ESTIMATES USING D8R AND D9R RIPPER PERFORMANCE m 38.93971618°,-119.94452246° 38.93976987°,-119.94440853° 0 -wave Velocity, ft/s IS CONSTRUCTION SOUTH TAHOE PUBLIC UTILITIES DISTRICT (STPUD) LEGEND PLATE MATERIALS NEEDLE PEAK, WILDWOOD, AND PIONEER TRAIL ---ANTICIPATED MAXIMUM EXCAVATION DEPTH ENGINEERS INC. REFRACTION LINE SEVEN (7) B- 1 c 0 00 Sierra Manor Drive, Suite 1 SOUTH LAKE TAHOE, CALIFORNIA Reno, NV 89511 PROJECT NO.:4036 DATE:12/10/2025 Distance, ft 0 5 10 15 20 25 30 35 0 . . . . . . . . . . . . . . . . . . I I . , i . . - 1 - 0 ILL --5 SOIL (LOOSE TO DENSE) - -1, , 7 --10 c - 0 O w -15 --15 w ) a) (I) ' 'CO . \ 'S 000 fY CC 7 -20 Nori. MODERATELY WEATHERED BEDROCK --20 000 --- 7007\ - 8000 — 8000 ,v0� 9000 9000 �� o. - 25 ' 1npn- 1°° 25 o° SLIGHTLY WEATHERED TO FRESH BEDROCK joo -30 • , - 1 I 10011.1111 EXCAVATABILITY DELINEATION 0 5 10 15 Lu 25 J • EARTHEN MATERIAL P-WAVE VELOCITY EXCAVATION Distance, ft CLASSIFICATION RANGE(FPS) CHARACTERISTIC"" SOIL(LOOSE TO DENSE) <3,000 EXCAVATABLE 111.1=11111,11 : - i - - MODERATELY 3,000-6,000 RIPPABLE 8 N ry W W . A cn Ul O) O) v v SD oo co WEATHERED BEDROCK O cn O U1 O cn O c 1 O 01 O U1 O of O of O 'SiU O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 SLIGHTLY WEATHERED >6,000 MARGINAL TO TO FRESH BEDROCK NON-RIPPABLE X-AXIS LAT/LONG oFt 39Ft ""REFERENCE: HANDBOOK OF RIPPING 12TH EDITION, BY CATERPILLAR, w -0 COORDINATES RIPABILITY ESTIMATES USING D8R AND D9R RIPPER PERFORMANCE cu 38.93920200°,-119.94899254° 38.93910588°,-119.94892549° . P-wave Velocity, ft/s 0 IS CONSTRUCTION SOUTH TAHOE PUBLIC UTILITIES DISTRICT (STPUD) LEGEND PLATE MATERIALS NEEDLE PEAK, WILDWOOD, AND PIONEER TRAIL ---ANTICIPATED MAXIMUM EXCAVATION DEPTH ENGINEERS INC. REFRACTION LINE TEN (10) B- 1 d 0 00 Sierra Manor Drive, Suite 1 SOUTH LAKE TAHOE, CALIFORNIA Reno, NV 89511 PROJECT NO.:4036 DATE:12/10/2025 Distance. ft 0 5 10 15 20 25 30 35 SO 5 QOG -n SOIL (LOOSE TO DENSE) 5 sor, o _ , , -2500 �2590- -10 ,� — — --10 1000 ? 40nn _ C �. o > OG > w -15 --15 w \ MODERATELY WEATHERED BEDROCK > - Jp -20 o„ 0o 9 0, 7000 7000 - SLIGtgc!,Y WEATHERED TO FRESH BEDROCK -25 \ - 9000 900 -30 T T 1 EXCAVATABILITY DELINEATION 0 5 10 15 20 25 30 EARTHEN MATERIAL P-WAVE VELOCITY EXCAVATION Distance, ft CLASSIFICATION RANGE(FPS) CHARACTERISTIC"" SOIL(LOOSE TO DENSE) <3,000 EXCAVATABLE 1.111.1W 1 - I I 1 "— I MODERATELY 3,000-6,000 RIPPABLE N r.) c.) co - - cn cn 0) rn -J Co Co c0 c0 —, WEATHERED BEDROCK o- cn o al o O1 O 01 o cn O cn o cn o 01 o 01 o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o SLIGHTLY WEATHERED MARGINAL TO o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 TO FRESH BEDROCK >6,000 NON-RIPPABLE — X-AXIS LAT/LONG OFt 39Ft ""REFERENCE: HANDBOOK OF RIPPING 12TH EDITION, BY CATERPILLAR, W -o COORDINATES RIPABILITY ESTIMATES USING D8R AND D9R RIPPER PERFORMANCE cu 38.94003295°,-119.94729247° 38.94008282°,-119.94717198° P-wave Velocity, ft/s 0 IIM CONSTRUCTION SOUTH TAHOE PUBLIC UTILITIES DISTRICT (STPUD) LEGEND PLATE MATERIALS NEEDLE PEAK, WILDWOOD, AND PIONEER TRAIL ---ANTICIPATED MAXIMUM EXCAVATION DEPTH ENGINEERS INC. REFRACTION LINE ELEVEN (11) B- 1 e 0 300 Sierra Manor Drive, Suite 1 SOUTH LAKE TAHOE, CALIFORNIA Reno, NV 89511 PROJECT NO.:4036 DATE:12/10/2025 Distance. ft 0 5 10 15 20 25 30 35 - I - . . - I - I I - 1 - - - - I - 0 , 0 (, 1- . ..„.. -•---\ \\ 4-0 o ,L500 Co -- 1 \ CO w -4000 MODERATELY WEATHERED BEDROCK ,ns�° w -10 5000 2 -10 a) CO :.►1 - - )000 - 4000 -� CO • -15 7 00 _ ? _ 6g8p -15 0 IOOp ' • 8000 I� -GH9fOf WEATHERED TO FRESH BEDROC -20 - - -20 0 10 15 2u -) Distance. ft EXCAVATABILITY DELINEATION EARTHEN MATERIAL P-WAVE VELOCITY EXCAVATION CLASSIFICATION RANGE(FPS) CHARACTERISTIC"" 411PPIPIII-7 ' I SOIL(LOOSE TO DENSE) <3,000 EXCAVATABLE fV N CO CA) A A CJ1 U1 O CT) - ---.1 CO CO CO CO O C.1 CD CJ1 CD U1 O CJl CD CJ1 CD C31 CD 01 O U1 CD CJ1 CD MODERATELY 3,000-6,000 RIPPABLE O O CD CD CD O O O CD CD O O CD O CD CD O CD CD WEATHERED BEDROCK CD 0 CD O O O CD O CD O CD O O O O O O CD CD CD SLIGHTLY WEATHERED >6,000 MARGINAL TO TO FRESH BEDROCKNON-RIPPABLE a w X-AXIS LAT/LONG _ OFt 39Ft ""REFERENCE: HANDBOOK OF RIPPING 12TH EDITION, BY CATERPILLAR, -o COORDINATES RIPABILITY ESTIMATES USING D8R AND D9R RIPPER PERFORMANCE cu 38.94128724°,-119.94679299° 38.94125372°,-119.94691408° P-wave Velocity, ft/s 0 111 CONSTRUCTION SOUTH TAHOE PUBLIC UTILITIES DISTRICT (STPUD) LEGEND PLATE MATERIALS NEEDLE PEAK, WILDWOOD, AND PIONEER TRAIL ---ANTICIPATED MAXIMUM EXCAVATION DEPTH ENGINEERS INC. REFRACTION LINE TWELVE (12) B- 1 f 0 Sierra Manor Drive, Suite 1 SOUTH LAKE TAHOE, CALIFORNIA Reno, NV 89511 PROJECT NO.:4036 DATE:12/10/2025 Distance, ft 0 5 10 15 20 25 30 35 0 I - - - - - - - - - I - i . . I - i - - I - i - - - - I - - - - I ` - - i - 0 -5 SOIL (LOOSE TO DENSE) -10 - 0 ? - 73 7 250n °' -15 w \/ 7 4 n n n �72500�• MODERATELY WEATHERED BEDRO;..........1( _ Tu - 5000 -20 7000 n 1GHTLYWEATHEREDTOFRESHBEDROCr 8000 -25 - _-- - 9000 `. Cu , , , I • , EXCAVATABILITY DELINEATION 0 5 10 15 20 L.., �� EARTHEN MATERIAL P-WAVE VELOCITY EXCAVATION Distance, ft CLASSIFICATION RANGE(FPS) CHARACTERISTIC"" SOIL(LOOSE TO DENSE) <3,000 EXCAVATABLE -�-� MODERATELY 3,000-6,000 RIPPABLE --, m N w w A Cn Cn rn rn w Co CO Co —, WEATHERED BEDROCK O Ui O Cn 0 Ui 0 Cn O Cn O Ol O Ol 0 Ui 0 Ui O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SLIGHTLY WEATHERED MARGINAL TO o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 TO FRESH BEDROCK >6,000 NON-RIPPABLE X-AXIS LAT/LONG OFt 39Ft ""REFERENCE: HANDBOOK OF RIPPING 12TH EDITION, BY CATERPILLAR, W -o COORDINATES RIPABILITY ESTIMATES USING D8R AND D9R RIPPER PERFORMANCE 38.94224452°,-119.94597246° 38.94219521°,-119.94608923° P-wave Velocity, ft/s 0 CONSTRUCTION SOUTH TAHOE PUBLIC UTILITIES DISTRICT (STPUD) LEGEND PLATE IIM ---ANTICIPATED MAXIMUM EXCAVATION DEPTH MATERIALS NEEDLE PEAK, WILDWOOD, AND PIONEER TRAIL ENGINEERS INC. REFRACTION LINE THIRTEEN (13) B- 1 g 0 300 Sierra Manor Drive, Suite 1 SOUTH LAKE TAHOE, CALIFORNIA Reno, NV 89511 PROJECT NO.:4036 DATE:12/10/2025 Distance, ft 0 5 10 15 20 25 30 35 0 - - 0 00 so 0 -5 - -5 r- -10 SOIL (LOOSE TO DENSE) o w -15 7 -15 w > > \ \ ----- as CC - J Z Ti) MODERATELY WEATHERED BEDROCK -20 • ? 20 w ? �7000 - --- .v \___• 8000_ ...-- 9000 LIGHTLY WEATHERED TO FRESH BEDROC -25 • 8000 - • -25 - - 9000 - - illiiiiiii.111 Ili -30 , - , EXCAVATABILITY DELINEATION 0 5 10 15 20 25 30 EARTHEN MATERIAL P-WAVE VELOCITY EXCAVATION Distance, ft CLASSIFICATION RANGE(FPS) CHARACTERISTIC** SOIL(LOOSE TO DENSE) <3,000 EXCAVATABLE 11.1 .1 Jill I i i MODERATELY 3,000-6,000 RIPPABLE fV fV w w -P cii (II a) rn -J Co Co co CO —, WEATHERED BEDROCK O Cn O U1 O c i O U1 O Ui O Ui O Ui O U1 O c i O O O O O O O O 0 0 0 0 0 0 0 0 0 0 0 O SLIGHTLY WEATHERED MARGINAL TO 0 O O O O O O 0 0 0 0 0 0 0 0 0 0 0 O 000 TO FRESH BEDROCK >6, NON-RIPPABLE a 0 w X-AXIS LAT/LONG OFt 39Ft **REFERENCE: HANDBOOK OF RIPPING 12TH EDITION, BY CATERPILLAR, -o COORDINATES RIPABILITY ESTIMATES USING D8R AND D9R RIPPER PERFORMANCE 0 38.90580886°,-119.96649504° 38.90585045°,-119.96637520° o P-wave Velocity, ft/s 111 CONSTRUCTION SOUTH TAHOE PUBLIC UTILITIES DISTRICT (STPUD) LEGEND PLATE MATERIALS NEEDLE PEAK, WILDWOOD, AND PIONEER TRAIL ---ANTICIPATED MAXIMUM EXCAVATION DEPTH ENGINEERS INC. REFRACTION LINE FOURTEEN (14) B- 1 h 0 Sierra Manor Drive, Suite 1 SOUTH LAKE TAHOE, CALIFORNIA Reno, NV 89511 PROJECT NO.:4036 DATE:12/10/2025 Distance. ft 0 5 10 15 20 25 30 35 i I i I i 1 _ . . . 0 —0 O 2 5 5 — —25pQ , • — 2500 o -10 `ow - SOIL (LOOSE TO DENSE) -10 0 CC > > a) - 2500 - 7 a) W 7 LLl a) 7 a) > > n3 CC c -15 -15 c MODERATELY WEATHERED BEDROCK - =::; 5, 76 -- 500U� / 7000 — 7000 -20 8000 - 00 -20 SLIGHTLY WEATHERED TO FRESH BEDROCK -25 - r - 0 5 10 15 20 25 30 EXCAVATABILITY DELINEATION Distance. ft EARTHEN MATERIAL P-WAVE VELOCITY EXCAVATION CLASSIFICATION RANGE(FPS) CHARACTERISTIC"" AMMIPI-- — ' SOIL(LOOSE TO DENSE) <3,000 EXCAVATABLE 1 I — N) N) w w -. -P Ui U1 O O OD OD O CC) _ MODERATELY 3,000-6,000 RIPPABLE O VI O (Ti O CP O U1 O U1 O Ui O C3i O Ul O U1 O WEATHERED BEDROCK O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 00 SLIGHTLY WEATHERED >6,000 MARGINAL TO TO FRESH BEDROCK NON-RIPPABLE w X-AXIS LAT/LONG OFt 39Ft ""REFERENCE: HANDBOOK OF RIPPING 12TH EDITION, BY CATERPILLAR, CCOORDINATES 38.90469416°,-119.96890669° 38.90478239°,-119.96883296° RIPABILITY ESTIMATES USING D8R AND D9R RIPPER PERFORMANCE 0 P-wave Velocity, ft/s 111 CONSTRUCTION SOUTH TAHOE PUBLIC UTILITIES DISTRICT (STPUD) LEGEND PLATE MATERIALS NEEDLE PEAK, WILDWOOD, AND PIONEER TRAIL ---ANTICIPATED MAXIMUM EXCAVATION DEPTH ENGINEERS INC. REFRACTION LINE FIFTEEN (15) B- 1 i 0 Sierra Manor Drive, Suite 1 SOUTH LAKE TAHOE, CALIFORNIA Reno, NV 89511 PROJECT NO.:4036 DATE:12/10/2025