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2nd Quarter 2021 Reclamation Permit Monitoring Report
59�8r i S50 Wat 5outh Tah Fublic Utility District 1275 Meadow Crest Drive-South Lake Tahoe-CA 96150-7401 Phone 530 544-6474-Fax 530 541-0614-www.5tpud.u5 Friday August 6, 2021 Michael Plaziak California Regional Water Quality Control Board - Lahontan Region 2501 Lake Tahoe Boulevard South Lake Tahoe, CA 96150 R B6-La h onta n CcD,waterboa rds.ca.g ov Subject: Reclamation Permit Monitoring Report, 2nd Quarter 2021 Mr. Plaziac: Enclosed is the South Tahoe Public Utility District's 2021 2"d quarter self-monitoring report for April through June 2021. The District is reporting as required by the Wastewater Reclamation Permit (Board Order R6T-2004-0010A3, WDID No. 6A095900700). Wastewater Reclamation Permit (Board Order R6T-2004-0010A1). The effluent met all the requirements set forth in the Board Order for this quarter; there were no violations. Emergency Retention Basin (ERB) A total of 2.00 MG was pumped to the ERB on April 5, 2021.This was done so that B-Line at the Luther Pass Pump Station could be drained so that equipment could be tested. The ERB was drained on April 6, 7 and 8. There was no wastewater remaining in the ERB on April 9, 2021. The ERB was inspected on April 27, 2021 and May 18, 2021; the reports are attached. Export Pipeline The District's Final Effluent Export Line was not inspected this quarter. Wastewater Reclamation Permit Compliance This monitoring program provides for continuous surface water monitoring, except during the months of December, January and February when only SW-01, SW-05, and SW-06 are monitored. LRWQCB - Page 2 Operational Problems or Major Maintenance Activities Modifications and operational problems occurring during this quarter are detailed in the section titled Operational Problems and Major Maintenance Activities in this report. Notes Sampling and analysis problems for offsite sample locations are listed in the Sample Comments section. Certification certify under penalty of law that this document and all attachments were prepared under my direction or supervision following a system designed to ensure that qualified personnel properly gather and evaluate the information submitted. Based on my knowledge of the person(s) who manage the system or those directly responsible for data gathering, 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. If you have any questions or require additional information, please contact me at the number provided above. Sincerely, John Thiel General Manager/ Engineer JTh iel(a)stpud.dst.ca.us DALahonlan\Reports12021 2nd Quarter Report doc LRWQCB - Page 3 Enclosures: Monthly Report Summary Pages Operational problems and maintenance activities. 1 Wastewater Treatment plant 6 Permit Compliance Record 1 Emergency Retention Basin (ERB) Inspection report. 4 Export Pipeline Inspection Report: 0 Sample site locations 2 Map of Alpine County sample sites 2 Harvey Place Reservoir recycled water storage 2 Final Effluent , HPR & DD-01- Trihalomethane Test Results 24 Alpine County and Tahoe Basin Surface waters, Groundwaters, and HPR 7 HPR Blue Green Algae results 1 Alpine County and Tahoe Basin groundwater elevations 1 Alpine County soils 1 Sample Comments 1 Tahoe Basin ERB Monitoring Wells Purge Records 4 Alpine County Monitoring Wells Purge Records 10 Photos of Irrigation ditch flows 0 Total pages 67 pdf: Lahontan Regional Water Quality Control Board LRWQCB Executive Officer— Michael Plaziak LRWQCB Senior Engineer— Robert Tucker Alpine County Board of Supervisors Alpine County Health Department— Dr. Richard Johnson Alpine County Health Department — Dennis Lampson Washoe Tribe Woodfords Community Council Chairman — Jim Irvin Washoe Tribe Environmental Specialist — Coralee Ditman Nevada Division of Environmental Protection — Birgit Widegren Nevada Division of Environmental Protection — Jean Stone STPUD Alpine County Operations — Jim Hilton STPUD Manager of Operations — Jeff Lee STPUD Operations Chief Plant Operator— Chris Siano STPUD Hydrogeologist — No Bergsohn STPUD Laboratory Director— Dan Arce STPUD Contract Commission — Dr. Richard Harvey DALahontan\Reportsk2021 2nd Quarter Report doc Operational Problems and Major Maintenance Activities April — June 2021 Wastewater Treatment Facilities • The District continued to operate under Covid-19 emergency procedures. Every department in the Operations and Maintenance staff at the District continued to segregate into distinct groups which did not overlap. The Waste Water Treatment Plant remained fully operational and in full compliance with monitoring requirements. Frequency of testing was not affected. • The District returned to normal scheduling procedures on June 18, 2021. • District staff found tears near the outlet structure of the north Emergency Retention Basin (ERB). The basin was isolated and temporary repairs were made. Permanent repairs were then made by a contractor. • The District removed Clarifier#3 from service. A $2.1 million rehabilitation project was started. The Clarifier will receive all new mechanical equipment and seismic upgrades. The Clarifier is expected to return to service in October 2021. • District staff replaced activated carbon in the Headworks odor scrubber. • The District continued utilizing control system upgrades at the Luther Pass Pump Station to shift export pumping to off-peak electricity rate periods in order to save energy costs. Wastewater Conveyance System • Sewer Pump Stations o B Line from Luther Pass Pump Station was drained in order to test new plumbing o Pumps at the Main Fallen Leaf Sewer Pump Station were converted from vacuum to electric pumps over several days. o Pump at Tahoe Keys Sewer Pump Station #1 was pulled and sent out for repairs .Once repaired the pump was installed and station went back in service. o Vacuum Pump at Pope Beach Sewer Pump Station #1 was rebuilt. Once installed pump did not work properly so vacuum pump was replaced altogether. o Pump #3 at Al Tahoe Sewer Pump Station was pulled so that wear rings on pump could be replaced. • Collection System o Only regular maintenance and repair activities were performed on the collection system. Alpine County Disposal Facilities • There were no modifications or additions to, or any major maintenance or construction conducted on, or any major problems occurring at the disposal facilities in Alpine County for April thru June, 2021. Page 1 SOUTH TAHOE PUBLIC UTILITY DISTRICT 8/9/2021 WASTEWATER TREATMENT PLANT MONTHLY REPORT 8:37 AM April 2021 <--------------------Flow MGD--------------------> BOD SS 2-Hr Peak Pond Pond Precipitation mg/L mg/L Date Day Inf Inf Eff Return Inf Inch Type Raw Final Raw Final 4/1/2021 Thu 3.27 4.1 3.70 4/2/2021 Fri 3.40 4.2 4.11 276 8.5 213 3.1 4/3/2021 Sat 3.56 4.7 3.17 4/4/2021 Sun 3.44 4.7 3.83 4/5/2021 Mon 3.26 4.2 1.40 2.00 4/6/2021 Tue 3.24 4.2 4.51 0.82 4/7/2021 Wed 3.24 4.1 4.30 0.63 279 9.2 227 3.2 4/8/2021 Thu 3.26 4.2 3.53 0.55 4/9/2021 Fri 3.31 4.2 3.55 4/10/2021 Sat 3.40 4.5 3.24 314 10.1 192 3.1 4/11/2021 Sun 3.16 4.6 3.82 4/12/2021 Mon 2.87 3.8 3.27 4/13/2021 Tue 2.78 3.5 2.75 0.48 Snow 240 8.5 158 4.0 4/14/2021 Wed 2.81 3.7 3.46 0.28 Snow 4/15/2021 Thu 2.84 3.7 2.95 4/16/2021 Fri 3.01 3.8 3.35 270 10.0 222 4.0 4/17/2021 Sat 3.24 4.4 3.35 4/18/2021 Sun 3.10 4.3 2.99 4/19/2021 Mon 2.82 3.8 4.33 4/20/2021 Tue 2.80 3.6 2.99 4/21/2021 Wed 2.76 3.7 2.12 0.01 Snow 256 10.1 176 4.5 4/22/2021 Thu 2.78 3.7 2.97 4/23/2021 Fri 2.91 3.6 3.09 254 9.3 201 3.9 4/24/2021 Sat 3.10 4.2 2.47 4/25/2021 Sun 2.98 4.0 3.65 0.09 Snow 4/26/2021 Mon 2.79 3.7 2.96 4/27/2021 Tue 2.69 3.5 2.96 288 8.2 301 3.2 4/28/2021 Wed 2.72 3.4 3.06 4/29/2021 Thu 2.77 3.6 2.97 4/30/2021 Fri 2.86 3.7 3.05 Permit Max 7.7 45 60 Permit Min Permit Ave 30 30 Total 91.17 119.4 97.90 2.00 2.00 0.86 2177 73.9 1690 29.1 Maximum 3.56 4.7 4.51 0.82 2.00 0.48 314 10.1 301 4.5 Minimum 2.69 3.4 1.40 0.55 2.00 0.01 240 8.2 158 3.1 Average 3.04 4.0 3.26 0.67 2.00 0.22 272 9.2 211 3.6 #Tests 30 30 30 3 1 4 8 8 8 8 Page 2 SOUTH TAHOE PUBLIC UTILITY DISTRICT 8/9/2021 WASTEWATER TREATMENT PLANT MONTHLY REPORT 8:37 AM April 2021 pH Chlorine <Final Total Coliforms> Total Nitrogen TDS Units mg/L MPN/100 mL mg/L mg/L Date Day Raw Final Final Total 7day-Median Raw Final Raw Final 4/1/2021 Thu 7.49 7.75 6.9 < 1 < 1 4/2/2021 Fri 7.41 7.63 6.1 1 < 1 4/3/2021 Sat 7.38 7.75 7.3 < 1 < 1 4/4/2021 Sun 7.54 7.71 6.7 1 < 1 4/5/2021 Mon 7.44 7.82 7.2 1 < 1 48.1 37.0 4/6/2021 Tue 7.52 7.71 4.6 < 1 < 1 4/7/2021 Wed 7.52 7.82 6.1 < 1 < 1 276 268 4/8/2021 Thu 7.52 7.77 7.0 < 1 < 1 4/9/2021 Fri 7.54 7.75 6.6 < 1 < 1 4/10/2021 Sat 7.45 7.75 7.0 < 1 < 1 4/11/2021 Sun 7.38 7.64 6.5 < 1 < 1 4/12/2021 Mon 7.43 7.59 6.7 < 1 < 1 4/13/2021 Tue 7.53 7.84 6.6 2 < 1 4/14/2021 Wed 7.36 7.64 7.1 < 1 < 1 4/15/2021 Thu 7.46 7.63 8.3 1 < 1 4/16/2021 Fri 7.54 7.80 6.7 1 < 1 4/17/2021 Sat 7.53 7.73 8.3 1 1 4/18/2021 Sun 7.59 7.77 6.6 < 1 1 4/19/2021 Mon 7.36 7.68 7.0 < 1 1 44.2 33.9 4/20/2021 Tue 7.53 7.76 6.9 3 1 4/21/2021 Wed 7.48 7.91 7.1 5.2 1 268 261 4/22/2021 Thu 7.57 7.82 8.0 2 1 4/23/2021 Fri 7.47 7.70 7.9 1 1 4/24/2021 Sat 7.51 7.71 5.6 2 2 4/25/2021 Sun 7.43 7.77 7.1 3.1 2 4/26/2021 Mon 7.53 7.82 6.8 < 1 2 4/27/2021 Tue 7.57 7.71 7.3 < 1 2 4/28/2021 Wed 7.47 7.69 6.2 2 2 4/29/2021 Thu 7.54 7.70 7.2 < 1 1 4/30/2021 Fri 7.57 7.83 7.8 < 1 < 1 Permit Max 9.00 23 Permit Min 6.50 Permit Ave Total 224.66 232.20 207.2 42.3 35 92.3 70.9 544 529 Maximum 7.59 7.91 8.3 5.2 2 48.1 37.0 276 268 Minimum 7.36 7.59 4.6 1 1 44.2 33.9 268 261 Average 7.49 7.74 6.91 1.4 1.2 46.2 35.5 272 265 #Tests 30 30 30 30 30 2 2 2 2 Page 1 SOUTH TAHOE PUBLIC UTILITY DISTRICT 8/9/2021 WASTEWATER TREATMENT PLANT MONTHLY REPORT 8:40 AM May 2021 <--------------------Flow MGD--------------------> BOD SS 2-Hr Peak Pond Pond Precipitation mg/L mg/L Date Day Inf Inf Eff Return Inf Inch Type Raw Final Raw Final 5/1/2021 Sat 3.10 4.1 3.22 304 7.8 256 2.7 5/2/2021 Sun 2.98 4.2 2.96 5/3/2021 Mon 2.75 3.6 3.18 5/4/2021 Tue 2.70 3.4 3.07 5/5/2021 Wed 2.72 3.5 3.34 226 7.4 178 3.3 5/6/2021 Thu 2.70 3.4 3.13 5/7/2021 Fri 2.77 3.4 2.94 5/8/2021 Sat 2.97 4.0 3.21 298 7.6 201 3.3 5/9/2021 Sun 2.86 4.1 3.08 5/10/2021 Mon 2.67 3.4 2.73 5/11/2021 Tue 2.64 3.5 2.94 280 5.8 217 1.7 5/12/2021 Wed 2.64 3.4 2.22 5/13/2021 Thu 2.71 3.4 2.99 5/14/2021 Fri 2.92 3.6 3.12 5/15/2021 Sat 3.14 4.2 3.15 0.02 Rain 319 7.9 239 2.2 5/16/2021 Sun 3.02 4.3 3.63 0.18 Rain 5/17/2021 Mon 2.79 3.9 2.97 5/18/2021 Tue 2.76 3.6 3.26 5/19/2021 Wed 2.69 3.4 3.59 268 7.1 228 1.8 5/20/2021 Thu 2.71 3.9 2.96 0.11 Snow 5/21/2021 Fri 2.93 3.7 3.50 0.18 Snow 5/22/2021 Sat 3.21 4.5 3.12 0.09 Snow 296 7.8 211 2.2 5/23/2021 Sun 3.08 4.5 3.16 5/24/2021 Mon 2.83 3.7 3.32 5/25/2021 Tue 2.78 3.5 3.14 283 6.8 207 2.3 5/26/2021 Wed 2.76 3.5 3.05 5/27/2021 Thu 2.79 3.6 3.43 5/28/2021 Fri 3.14 4.0 3.52 312 6.2 221 1.5 5/29/2021 Sat 3.55 4.8 3.26 5/30/2021 Sun 3.67 5.2 3.59 5/31/2021 Mon 3.33 4.9 4.10 Permit Max 7.7 45 60 Permit Min Permit Ave 30 30 Total 90.31 120.2 98.88 0.00 0.00 0.58 2586 64.3 1958 21.1 Maximum 3.67 5.2 4.10 0.00 0.00 0.18 319 7.9 256 3.3 Minimum 2.64 3.4 2.22 0.00 0.00 0.02 226 5.8 178 1.5 Average 2.91 3.9 3.19 0.12 287 7.1 218 2.3 #Tests 31 31 31 0 0 5 9 9 9 9 Page 2 SOUTH TAHOE PUBLIC UTILITY DISTRICT 8/9/2021 WASTEWATER TREATMENT PLANT MONTHLY REPORT 8:40 AM May 2021 pH Chlorine <Final Total Coliforms> Total Nitrogen TDS Units mg/L MPN/100 mL mg/L mg/L Date Day Raw Final Final Total 7day-Median Raw Final Raw Final 5/1/2021 Sat 7.55 7.81 6.9 < 1 < 1 5/2/2021 Sun 7.59 7.77 7.3 < 1 < 1 5/3/2021 Mon 7.29 7.72 6.9 < 1 < 1 44.1 32.4 5/4/2021 Tue 7.35 7.68 5.3 < 1 < 1 5/5/2021 Wed 7.48 7.88 7.1 < 1 < 1 300 288 5/6/2021 Thu 7.60 7.72 6.7 < 1 < 1 5/7/2021 Fri 7.50 7.78 7.8 < 1 < 1 5/8/2021 Sat 7.43 7.69 7.0 < 1 < 1 5/9/2021 Sun 7.63 7.78 6.9 < 1 < 1 5/10/2021 Mon 7.47 7.70 6.2 < 1 < 1 5/11/2021 Tue 7.47 7.80 4.5 < 1 < 1 5/12/2021 Wed 7.48 7.70 5/13/2021 Thu 7.52 7.76 7.8 < 1 < 1 5/14/2021 Fri 7.58 7.67 6.9 1 < 1 5/15/2021 Sat 7.55 7.86 8.1 < 1 < 1 5/16/2021 Sun 7.47 7.72 6.7 < 1 < 1 5/17/2021 Mon 7.50 7.77 6.8 < 1 < 1 46.2 29.6 5/18/2021 Tue 7.55 7.80 6.1 < 1 < 1 5/19/2021 Wed 7.39 7.64 6.7 < 1 < 1 5/20/2021 Thu 7.56 7.62 7.6 < 1 < 1 5/21/2021 Fri 7.56 NV 7.7 < 1 < 1 5/22/2021 Sat 7.50 7.58 6.9 < 1 < 1 5/23/2021 Sun 7.57 7.70 7.0 < 1 < 1 302 274 5/24/2021 Mon 7.55 7.78 5.8 < 1 < 1 5/25/2021 Tue 7.61 7.87 5.6 < 1 < 1 5/26/2021 Wed 7.59 7.61 6.5 < 1 < 1 5/27/2021 Thu 7.51 7.62 7.5 1 < 1 5/28/2021 Fri 7.51 7.62 6.7 < 1 < 1 5/29/2021 Sat 7.55 7.68 5.5 < 1 < 1 5/30/2021 Sun 7.54 7.67 6.4 < 1 < 1 5/31/2021 Mon 7.36 7.55 5.1 < 1 < 1 54.7 30.9 Permit Max 9.00 23 Permit Min 6.50 Permit Ave Total 232.81 231.55 200.0 30 30 145.0 92.9 602 562 Maximum 7.63 7.88 8.1 1 1 54.7 32.4 302 288 Minimum 7.29 7.55 4.5 1 1 44.1 29.6 300 274 Average 7.51 7.72 6.67 1.0 1.0 48.3 31.0 301 281 #Tests 31 30 30 30 30 3 3 2 2 Page 1 SOUTH TAHOE PUBLIC UTILITY DISTRICT 8/9/2021 WASTEWATER TREATMENT PLANT MONTHLY REPORT 8:43 AM June 2021 <--------------------Flow MGD--------------------> BOD SS 2-Hr Peak Pond Pond Precipitation mg/L mg/L Date Day Inf Inf Eff Return Inf Inch Type Raw Final Raw Final 6/1/2021 Tue 2.94 3.9 3.21 307 9.5 246 1.2 6/2/2021 Wed 2.89 3.8 3.20 6/3/2021 Thu 2.90 3.7 3.24 6/4/2021 Fri 3.12 3.9 3.10 6/5/2021 Sat 3.36 4.4 3.47 305 9.4 229 1.7 6/6/2021 Sun 3.22 4.7 3.36 6/7/2021 Mon 3.06 4.1 3.19 6/8/2021 Tue 2.93 3.9 3.11 6/9/2021 Wed 2.96 3.8 3.57 304 7.2 255 0.8 6/10/2021 Thu 3.06 3.9 3.35 6/11/2021 Fri 3.21 4.0 3.20 6/12/2021 Sat 3.41 4.5 2.86 307 4.5 242 1.3 6/13/2021 Sun 3.39 4.7 3.27 6/14/2021 Mon 3.20 4.2 3.72 6/15/2021 Tue 3.17 4.3 3.47 300 6.2 216 1.6 6/16/2021 Wed 3.11 4.0 3.39 6/17/2021 Thu 3.21 4.1 3.90 6/18/2021 Fri 3.45 4.5 3.48 252 7.8 220 2.7 6/19/2021 Sat 3.66 5.0 3.43 6/20/2021 Sun 3.53 4.9 3.75 6/21/2021 Mon 3.37 4.4 3.74 279 7.8 207 1.7 6/22/2021 Tue 3.31 4.3 3.87 6/23/2021 Wed 3.32 4.3 3.27 6/24/2021 Thu 3.29 4.3 3.88 T Rain 6/25/2021 Fri 3.47 4.5 3.79 NV NV 296 4.5 6/26/2021 Sat 3.58 4.7 3.50 6/27/2021 Sun 3.50 4.7 3.56 6/28/2021 Mon 3.32 4.3 3.58 6/29/2021 Tue 3.25 4.2 3.43 NV NV 271 3.5 6/30/2021 Wed 3.23 4.1 3.89 Permit Max 7.7 45 60 Permit Min Permit Ave 30 30 Total 97.42 128.1 103.78 0.00 0.00 0.00 2054 52.5 2182 19.0 Maximum 3.66 5.0 3.90 0.00 0.00 0.00 307 9.5 296 4.5 Minimum 2.89 3.7 2.86 0.00 0.00 0.00 252 4.5 207 0.8 Average 3.25 4.3 3.46 293 7.5 242 2.1 #Tests 30 30 30 0 0 0 7 7 9 9 Page 2 SOUTH TAHOE PUBLIC UTILITY DISTRICT 8/9/2021 WASTEWATER TREATMENT PLANT MONTHLY REPORT 8:43 AM June 2021 pH Chlorine <Final Total Coliforms> Total Nitrogen TDS Units mg/L MPN/100 mL mg/L mg/L Date Day Raw Final Final Total 7day-Median Raw Final Raw Final 6/1/2021 Tue 7.50 7.59 6.0 < 1 < 1 270 282 6/2/2021 Wed 7.57 7.51 6.9 < 1 < 1 6/3/2021 Thu 7.45 7.56 6.8 < 1 < 1 6/4/2021 Fri 7.45 7.41 5.6 < 1 < 1 6/5/2021 Sat 7.37 7.50 6.9 < 1 < 1 6/6/2021 Sun 7.33 7.54 6.6 < 1 < 1 6/7/2021 Mon 7.61 7.64 7.1 < 1 < 1 6/8/2021 Tue 7.60 7.68 6.3 < 1 < 1 6/9/2021 Wed 7.37 7.62 7.5 < 1 < 1 6/10/2021 Thu 7.60 7.72 6.5 < 1 < 1 6/11/2021 Fri 7.56 7.71 6.2 < 1 < 1 6/12/2021 Sat 7.57 7.74 6.6 < 1 < 1 6/13/2021 Sun 7.63 7.64 6.2 < 1 < 1 6/14/2021 Mon 7.47 7.60 6.4 < 1 < 1 57.1 27.7 6/15/2021 Tue 7.57 7.77 4.7 < 1 < 1 6/16/2021 Wed 7.49 7.63 7.4 < 1 < 1 6/17/2021 Thu 7.45 7.59 6.2 < 1 < 1 6/18/2021 Fri 7.51 7.72 6.2 < 1 < 1 6/19/2021 Sat 7.59 7.70 6.0 < 1 < 1 6/20/2021 Sun 7.51 7.78 5.9 < 1 < 1 6/21/2021 Mon 7.52 7.85 6.5 < 1 < 1 6/22/2021 Tue 7.51 7.72 6.5 < 1 < 1 6/23/2021 Wed 7.48 7.73 6.1 < 1 < 1 6/24/2021 Thu 7.46 7.68 7.9 < 1 < 1 6/25/2021 Fri 7.46 7.74 8.0 < 1 < 1 340 318 6/26/2021 Sat 7.43 7.79 8.5 < 1 < 1 6/27/2021 Sun 7.47 7.82 8.5 1.0 < 1 6/28/2021 Mon 7.52 7.85 6.7 < 1 < 1 58.8 38.0 6/29/2021 Tue 7.41 7.91 6.6 < 1 < 1 6/30/2021 Wed 7.38 7.75 5.9 < 1 < 1 Permit Max 9.00 23 Permit Min 6.50 Permit Ave Total 224.84 230.49 199.2 30 30 115.9 65.7 610 600 Maximum 7.63 7.91 8.5 < 1 < 1 58.8 38.0 340 318 Minimum 7.33 7.41 4.7 1 < 1 57.1 27.7 270 282 Average 7.49 7.68 6.64 < 1 < 1 58.0 32.9 305 300 #Tests 30 30 30 30 30 2 2 2 2 Page 3 SOUTH TAHOE PUBLIC UTILITY DISTRICT WASTEWATER TREATMENT PLANT NUMBER OF VIOLATIONS 2021 Parameter #Tests Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total Compliance Total Plant Inflow;7.7 MGD; Dry Weather 181 0 0 0 0 0 0 0 100.0% 2-Hour Peak Inflow; 18.5 MGD 181 0 0 0 0 0 0 0 100.0% BOD,30 Day Ave: 30 mg/L 6 0 0 0 0 0 0 0 100.0% BOD, Max:45 mg/L 49 0 0 0 0 0 0 0 100.0% SS,30 Day Ave:30 mg/L 6 0 0 0 0 0 0 0 100.0% SS, Max:60 mg/L 51 0 0 0 0 0 0 0 100.0% pH,6.5 to 8.5 179 0 0 0 0 0 0 0 100.0% Total Coliforms, Max:240 MPN/100 mL 180 0 0 0 0 0 0 0 100.0% Total Coliforms,7-day Median:23 MPN 180 0 0 0 0 0 0 0 100.0% Total 1,013 0 0 0 0 0 0 0 0 0 0 0 0 0 100.0% South Tahoe Public Utility District ERB Inspection 4 Date of Inspection: 7 2 ; Performed by: Inspection Procedure: Walk the entire crest of the ERB looking for any problems. Pay particular attention to the condition of the liner. Note the location of any needed repairs on the map on the next page. If the basin is empty and free of snow, walk the entire interior tow checking for liner failures. Scan the entire floor for breaches of any kind. Rodent activity: Vegetation control: FY%i R Overflow Spillway: Stairs North: 19 Stairs South: Top Fill Structure North: 620cz� Top Fill Structure South: 6;oc:7 Drain Valve North: 9:t� Drain Valve South: 42cciD Perimeter Fence & Gates: 6::bc'7 Valve House: 41)CaD Comments: _ �£AD cR C` G w Nc� f'14TCH 0 p fhLLCM V449 11-1 kG rc i l Date of Inspection: z7 ' ZI Performed by: —Valve Mouse Outlet Valve 1 Nofh Pond'' t �I j 1 Stairs �j}r yy I _ fflf I! �Qutlet Valve !, k � �� t Cyr. South Pond r,r, + . . + + + Stairs mot. :�•-- �-� �i' South Tahoe Public Utility District ERB Inspection Date of Inspection: a 2 ( Performed by: Inspection Procedure: Walk the entire crest of the ERB looking for any problems. Pay particular attention to the condition of the liner. Note the location of any needed repairs on the map on the next page. If the basin is empty and free of snow, walk the entire interior tow checking for liner failures. Scan the entire floor for breaches of any kind. Rodent activity: o� Vegetation control: {-�t Overflow Spillway: Stairs North: Stairs South: Top Fill Structure North: Top Fill Structure South: Drain Valve North: Drain Valve South: Perimeter Fence & Gates: Valve House: i , Comments: ►r r] ��L.'�.,� ��;�� ���.� CJ�� � �. ram_ `�. fi r:�!' r ftiCr �c � ] A �1 � n .� uv. {) V,. Date of Inspection: b Performed by: S v --Valve ouse � 4 - -_ 1 f is utlet Valve I ; Forth-Pond. _ Stairs t i 1I ,- f' zj I � j Outlet Valve South Pond .. St Cali fa f f + + + + + + 4 Sample Sites Site Latitude Longitude Location Type Sample Alpine County Monitoring Wells ACMW-01AW 38.766952 -119.781561 Below Main Dam Monitoring Well ACMW-01 BE 38.766333 -119.785321 Below Secondary Dam Monitoring Well ACMW-02N 38.772392 -119.776819 Access gate Monitoring Well ACMW-02S 38.772341 -119.776816 Access gate Monitoring Well ACMW-04W 38.836719 -119.779439 Gansberg Ranch Monitoring Well ACMW-06S 38.800481 -119.763195 Celio Ranch,along DV Rd Monitoring Well ACMW-07S 38.771882 -119.801658 Diamond Valley Ranch Monitoring Well ACMW-08N 38.773618 -119.776847 Diamond Valley Ranch Monitoring Well ACMW-09D 38.780489 -119.790314 Diamond Valley Ranch Monitoring Well ACMW-10 38.773336 -119.794246 Diamond Valley Weather Station Monitoring Well ACMW-11 38.775595 -119.788216 Diamond Valley Ranch Monitoring Well ACMW-12 38.777644 -119.795388 Diamond Valley Ranch Monitoring Well ACMW-13 38.768977 119.797083 Diamond Valley Ranch Monitoring Well ACMW-14 38.767441 119.793215 Diamond Valley Ranch Monitoring Well ACMW-15 38.769600 119.784280 Diamond Valley Ranch Monitoring Well ACMW-16 38.773829 119.784173 Diamond Valley Ranch Monitoring Well ACMW-17 38.776273 119.790107 Diamond Valley Ranch Monitoring Well ACMW-18 38.779213 119.782997 Diamond Valley Ranch Monitoring Well ACMW-19 38.776249 119.762112 Diamond Valley Ranch Monitoring Well ACMW-20 38.808781 119.777665 Near SW-05 Monitoring Well ACMW-21 38.819915 119.777072 Emigrant Trail near Chambers Lane Monitoring Well ACMW-22 38.829022 119.783738 Fredericksburg Lane near S7 Monitoring Well ACMW-23 38.825384 119.760193 On road to SW-15,upstream(S) Monitoring Well ACMW-24 38.832193 119.757427 On road,downstream (N) of SW-15 Monitoring Well ACMW-25 38.830470 119.769901 Road between Brooke's&Neddenriep @ Neddenripp's Monitoring Well ACMW-26 38.840602 119.769677 Road between Brooke's&Neddenriep @ Stateline Monitoring Well Alpine County Domestic Well GW-05 38.830897 -119.773807 Neddenriep Ranch house Domestic Well GW-08 38.815528 -119.781095 Arant Ranch house Domestic Well GW-11 38.766522 -119.808540 Diamond Valley School Domestic Well GW-17 DV Ranch Domestic well Domestic Well D:\Lahontan\Sample Sites\Lahontan Report-Sample Sites 2019 Page 1 of 2 Sample Sites Site Latitude Longitude Location Type Sample Alpine County Surfacewater Sites SW-01 38.768903 -119.838353 Carson River,W Fork,Crystal Springs Rd Surfacewater SW-02 38.756651 -119.806706 Indian Creek @ Diversion Surfacewater SW-03 38.773149 -119.772618 Indian Creek downstream of 1st bridge Surfacewater SW-04 38.776730 -119.760423 Indian Creek upstream of 2nd bridge Surfacewater SW-05 38.809525 -119.777030 Carson River,W Fork,Paynesville Surfacewater SW-06 38.840850 -119.764100 Carson River,W Fork,Stateline Surfacewater SW-07 38.854967 -119.786541 Fredericksburg Ditch Surfacewater SW-08 38.786579 -119.799800 Irrigation Ditch along Carson River Road Surfacewater Alpine County Soils Sites S-2 38.800316 -119.764305 Cello Ranch Soil S-3 38.801156 -119.780333 Bentley Ranch Soil S-4 38.842761 -119.780047 Gansberg Ranch Soil S-5 38.836900 -119.780200 Gansberg Ranch Soil S-6 38.829075 -119.780010 Neddenriep Ranch Soil S-7 38.829190 -119.785420 Bruns Ranch Soil Heavenly Valley Creek HVC-1 38.917861 -119.959632 Heavenly Valley Creek;Downstream of Pioneer Surfacewater HVC-2 38.920120 -119.969390 Heavenly Valley Creek;250'upstream of Pond#2 Surfacewater HVC-3 38.921373 -119.971421 Heavenly Valley Creek;25 downstream of Meadow Crest Dr Surfacewater HVC-5 38.921278 -119.971090 Heavenly Valley Creek;Effluent of drainage pipe along Meadow Crest Dr Surfacewater Tahoe Basin Monitoring Wells Control 38.9135951 -119.9623870 North east of post office @ Black Bart and Pioneer Trail Monitoring Well MW01-50 38.9131807 -119.9640739 SE corner of Emergency Retention Basin,At access gate to ERB Monitoring Well MW01.5 38.9129062 -119.9642166 SE corner of Emergency Retention Basin,At access gate to ERB Monitoring Well MW02-50 38.9128116 -119.9652141 South side of Emergency Retention Basin,on Black Bart Ave Monitoring Well MW03-50 38.9129187 -119.9657562 South side of Emergency Retention Basin,on Black Bart Ave Monitoring Well MW04-50 38.9148881 -119.9666463 W side of Emergency Retention Basin,off Hank Monk Ave Monitoring Well MW07-50 38.9157020 -119.9639551 NE corner of Emergency Retention Basin Monitoring Well MW08-25 38.9213967 -119.9709800 SW corner of Pond#1,at south access gate to STPUD Monitoring Well MW11 38.9238680 -119.9677190 250 ft south east of North Gate(to Al Tahoe Blvd) Monitoring Well MW12 38.9226200 -119.9683700 110 ft south of Biosolids Building Monitoring Well MW13 38.9206200 -119.9692200 125 ft south east of Pond#2 Monitoring Well Ditch Sites DD-01 38.765624 -119.780543 Diamond Ditch @ beginning;HPR effluent Ditch SW-12 38.809127 -119.777411 Bruns Diversion Ditch SW-13 38.810082 -119.776900 Fredericksburg Ditch Ditch SW-15 38.828440 -119.756263 Cello Tail water Ditch SW-16 38.866896 -119.783627 Drain Ditch @ Fairview Ln Ditch Reservoirs HPR 38.764500 -119.780450 Harvey Place Reservoir Reservoir D:\Lahontan\Sample Sites\Lahontan Report-Sample Sites 2019 Page 2 of 2 36 I sw-o _ 7 SW �14 � z Ln g �j , -- - ir JEEP 3 }---- °o __//hI -- --- -- ------ - CMW-04W i sM _ i I 5039" � N Oo ICI `. 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Harvey Place Reservoir Recycled Water Current Storage Not including 200+/-acre-foot dead pool Maximum Storage,Acre-feet: 3,800 Stored Remaining Date Acre-feet Acre-feet 01/01/16 743 3,057 02/01/16 1,185 2,615 03/01/16 1,493 2,307 04/01/16 1,875 1,925 05/01/16 2,104 1,696 06/01/16 2,322 1,478 07/01/16 2,139 1,661 08/01/16 1,304 2,496 09/01/16 595 3,205 10/01/16 72 3,728 11/01/16 243 3,557 12/01/16 479 3,321 01/01/17 940 2,860 02/01/17 1,843 1,957 03/01/17 3,082 718 04/01/17 3,460 340 05/01/17 3,005 795 06/01/17 2,617 1,183 07/01/17 2,210 1,590 08/01/17 1,626 2,174 09/01/17 878 2,922 10/01/17 114 3,686 11/01/17 220 3,580 12/01/17 544 3,256 01/01/18 878 2,922 02/01/18 1,177 2,623 03/01/18 1,410 2,390 04/01/18 1,938 1,862 05/01/18 2,246 1,554 06/01/18 2,465 1,335 07/01/18 1,927 1,873 08/01/18 1,240 2,560 09/01/18 531 3,269 10/01/18 88 3,712 11/01/18 206 3,594 12/01/18 453 3,347 01/01/19 781 3,019 02/01/19 1,131 2,669 03/01/19 1,714 2,086 04/01/19 2,210 1,590 05/01/19 2,517 1,283 06/01/19 1,991 1,809 07/01/19 1,326 2,474 08/01/19 693 3,107 09/01/19 185 3,615 10/01/19 72 3,728 11/01/19 217 3,583 12/01/19 472 3,328 01/01/20 798 3,002 02/01/20 1,063 2,737 03/01/20 1,326 2,474 04/01/20 1,573 2,227 05/01/20 1,783 2,017 06/01/20 1,896 1,904 07/01/20 1,395 2,405 08/01/20 750 3,050 09/01/20 137 3,663 10/01/20 72 3,728 11/01/20 222 3,578 12/01/20 472 3,328 01/01/21 764 3,036 02/01/21 1,050 2,750 03/01/21 1,296 2,504 04/01/21 1,564 2,236 05/01/21 1,763 2,037 06/01/21 1,908 1,892 Z:\HPR\HPR Current Storage-Lahantan_Rgp Harvey Place Reservoir Recycled Water Storage 4,000 3,500 3,000 a� a� 2,500 a 2,000 1,500 1,000 500 0 c0 c0 c0c0c0c0c0 c0 c0 c0c0c0 I-I-I-I—I—I- W W W o0 o0 o0 W W W o0 o0 o2 OOOmmm OOOOm O 00000000 C)C)C) rrr r N N N N N N N N N N N N N N N N N N r NMV�c0 I�o—O Or Nr NM7 iIJc0 IO W mOr Nr 64`)4 N CO r W�Or Nr i;4')VIn--W-O r NrNMV�c0 I�o0m OrN rNMV�cO O O O O O O O O O r r r O O O O O O O O O r r r O O O O O O O O O r r r O 0 0 0 0 0 0 0 0 r r r O 0 0 0 0 0 0 0 0 r r r 0 0 0 0 0 0 Storage E1'1VIR0riMEriTAJL!W. . , Analytical Chemists July 29, 2021 South Tahoe Public Utility District Lab ID : SP 2108497 1275 Meadow Crest Drive Customer 2-11369 South Lake Tahoe, CA 96150 Laboratory Report Introduction: This report package contains total of 17 pages divided into 3 sections: Case Narrative (2 pages) : An overview of the work performed at FGL. Sample Results (9 pages) : Results for each sample submitted. Quality Control (6 pages) : Supporting Quality Control (QC)results. Case Narrative This Case Narrative pertains to the following samples: Sample Description Date I Sampled R Dat ed FGL Lab ID # Matrix DD-01 Diamond Ditch@Beginning 06/23/2021 06/24/2021 SP 2108497-001 WW WW-05 Final Grab 06/23/2021 06/24/2021 SP 2108497-002 WW 11 HPR Harvey Place Reservoir 06/23/2021 06/24/2021 SP 2108497-003 1 WW Sampling and Receipt Information: All samples were received in acceptable condition and within temperature requirements, unless noted on the Condition Upon Receipt(CUR) form. All samples arrived at 6 'C. All samples were prepared and analyzed within the method specified hold time. All samples were checked for pH if acid or base preservation is required(except for VOAs). For details of sample receipt information, please see the attached Chain of Custody and Condition Upon Receipt Form. Quality Control: All samples were prepared and analyzed according to the following tables: Organic QC 5030B 07/01/2021:207378 All preparation quality controls are within established criteria(performed at FGL-SP ELAN 1573). 07/01/2021:210107 All analysis quality controls are within established criteria,except: The following note applies to 2,2-Dichloropropane,2-Hexanone,Acrolein,Acrylonitrile, Chloromethane(Methyl Chloride),Ethyl tert-Butyl Ether,Isopro: 8260B 360 CCV above Acceptance Range(AR). Samples which were non detect for this analyte were accepted. The following note applies to 2,2-Dichloropropane,2-Hexanone,Acrolein,Acrylonitrile, Chloromethane(Methyl Chloride),Ethyl tert-Butyl Ether,Isopro: 380 CCV met CCC and SPCC criteria,Results were reported. Page 1 of 17 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 July 29, 2021 Lab ID : SP 2108497 South Tahoe Public Utility District Customer : 2-11369 Certification:: I certify that this data package is in compliance with ELAP standards, both technically and for completeness, except for any conditions listed above. Release of the data contained in this data package is authorized by the Laboratory Director or his designee, as verified by the following electronic signature. KD:MKH Digitally signed by David Tea,B.A.,M.B.A. Approved By David Terz,B.A.,M.B.A. Title:QA Dueetor Date:2021-07-29 Page 2 of 17 ENVIRONMENTAINW. . , Analytical Chemists July 29, 2021 Lab ID : SP 2108497-001 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : June 23, 2021-10:13 South Lake Tahoe, CA 96150 Sampled By : Arce/Chernago/Uribe Received On : June 24, 2021-11:50 Matrix : Waste Water Description : DD-01 Diamond Ditch@Beginning Project : AG78156,AG78155,AG78157 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 4-Bromofluorobenzene$ 105 81-112 % 5030B 07/01/21:207378 8260B 07/01/21:210107 Dibromofluoromethane$ 110 67-133 % 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichloroethane-d4$ 106 70-129 % 5030B 07/01/21:207378 8260B 07/01/21:210107 Toluene-d8$ 110 71-119 % 5030B 07/01/21:207378 8260B 07/01/21:210107 Acetone ND 50 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Acrolein ND 50 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Acrylonitrile ND 50 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Benzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromochloromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromodichloromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromoform ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromomethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 tert-Butanol ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2-Butanone(MEK) ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 n-Butylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 sec-Butylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 tert-Butylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Carbon Disulfide ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Carbon Tetrachloride ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chloroethane ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chloroform ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chloromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2-Chlorotoluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 4-Chlorotoluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Dibromochloromethane ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Dibromomethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3-Dichlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,4-Dichlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Dichlorodifluoromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1-Dichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1-Dichloroethylene I ND 1 0.5 1 ug/L I I 5030B 07/01/21:207378 8260B 07/01/21:210107 Page 3 of 17 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 July 29, 2021 Lab ID : SP 2108497-001 Description : DD-01 Diamond Ditch@Beginning Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 cis-1,2-Dichloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 trans-1,2-Dichloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichloropropane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3-Dichloropropane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2,2-Dichloropropane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1-Dichloropropene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3-Dichloropropene(Total) ND -- ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 cis-1,3-Dichloropropene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 trans-1,3-Dichloropropene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Di-isopropyl ether(DIPE) ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Ethyl Benzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Ethyl tert-butyl ether ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 (ETBE) Hexachlorobutadiene ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2-Hexanone ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Isopropylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 p-Isopropyltoluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Methyl tert-butyl ether ND 0.2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 (MTBE) 4-Methyl-2-pentanone ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 (MIBK) Methylene Chloride ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Naphthalene ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 n-Propylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Styrene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 tert-Amyl methyl ether (TAME) ND 5 ug/L 5030B 07/01/21:207378 8260B 07i01i21:210107 1,1,1,2-Tetrachloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1,2,2-Tetrachloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Tetrachloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Toluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2,3-Trichlorobenzene ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2,4-Trichlorobenzene ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1,1-Trichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1,2-Trichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Trichloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Trichlorofluoromethane ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2,4-Trimethylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3,5-Trimethylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Vinyl Acetate ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Vinyl Chloride ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Xylenes ND -- ug/L 5030B 07/01/21:207378 8260B L11 Page 4 of 17 July 29, 2021 Lab ID : SP 2108497-001 Description : DD-01 Diamond Ditch@Beginning Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 Xylenes m,p ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Xylenes o ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.*PQL adjusted for dilution. Page 5 of 17 ENVIRONMENTAINW. . , Analytical Chemists July 29, 2021 Lab ID : SP 2108497-002 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : June 23, 2021-10:46 South Lake Tahoe, CA 96150 Sampled By : B. Chernago Received On : June 24, 2021-11:50 Matrix : Waste Water Description : WW-05 Final Grab Project : AG78156,AG78155,AG78157 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 4-Bromofluorobenzene* 105 81-112 % 5030B 07/01/21:207378 8260B 07/01/21:210107 Dibromofluoromethanet 109 67-133 % 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichloroethane-d4$ 106 70-129 % 5030B 07/01/21:207378 8260B 07/01/21:210107 Toluene-d8$ 110 71-119 % 5030B 07/01/21:207378 8260B 07/01/21:210107 Acetone ND 50 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Acrolein ND 50 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Acrylonitrile ND 50 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Benzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromochloromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromodichloromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromoform ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromomethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 tert-Butanol ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2-Butanone(MEK) ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 n-Butylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 sec-Butylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 tert-Butylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Carbon Disulfide ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Carbon Tetrachloride ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chloroethane ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chloroform 2 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chloromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2-Chlorotoluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 4-Chlorotoluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Dibromochloromethane ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Dibromomethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3-Dichlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,4-Dichlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Dichlorodifluoromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1-Dichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1-Dichloroethylene I ND 1 0.5 1 ug/L I I 5030B 07/01/21:207378 8260B 07/01/21:210107 Page 6 of 17 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 July 29, 2021 Lab ID : SP 2108497-002 Description : WW-05 Final Grab Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 cis-1,2-Dichloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 trans-1,2-Dichloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichloropropane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3-Dichloropropane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2,2-Dichloropropane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1-Dichloropropene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3-Dichloropropene(Total) ND -- ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 cis-1,3-Dichloropropene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 trans-1,3-Dichloropropene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Di-isopropyl ether(DIPE) ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Ethyl Benzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Ethyl tert-butyl ether ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 (ETBE) Hexachlorobutadiene ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2-Hexanone ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Isopropylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 p-Isopropyltoluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Methyl tert-butyl ether ND 0.2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 (MTBE) 4-Methyl-2-pentanone ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 (MIBK) Methylene Chloride ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Naphthalene ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 n-Propylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Styrene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 tert-Amyl methyl ether (TAME) ND 5 ug/L 5030B 07/01/21:207378 8260B 07i01i21:210107 1,1,1,2-Tetrachloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1,2,2-Tetrachloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Tetrachloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Toluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2,3-Trichlorobenzene ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2,4-Trichlorobenzene ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1,1-Trichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1,2-Trichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Trichloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Trichlorofluoromethane ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2,4-Trimethylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3,5-Trimethylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Vinyl Acetate ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Vinyl Chloride ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Xylenes I ND -- ug/L 5030B 07/01/21:207378 8260B L11 Page 7 of 17 July 29, 2021 Lab ID : SP 2108497-002 Description : WW-05 Final Grab Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 Xylenes m,p ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Xylenes o ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.*PQL adjusted for dilution. Page 8 of 17 ENVIRONMENTAINW. . , Analytical Chemists July 29, 2021 Lab ID : SP 2108497-003 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : June 23, 2021-13:32 South Lake Tahoe, CA 96150 Sampled By : Arce/Chernago/Uribe Received On : June 24, 2021-11:50 Matrix : Waste Water Description : HPR Harvey Place Reservoir Project : AG78156,AG78155,AG78157 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 4-Bromofluorobenzene$ 104 81-112 % 5030B 07/01/21:207378 8260B 07/01/21:210107 Dibromofluoromethane$ 110 67-133 % 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichloroethane-d4$ 103 70-129 % 5030B 07/01/21:207378 8260B 07/01/21:210107 Toluene-d8$ 109 71-119 % 5030B 07/01/21:207378 8260B 07/01/21:210107 Acetone ND 50 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Acrolein ND 50 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Acrylonitrile ND 50 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Benzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromochloromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromodichloromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromoform ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Bromomethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 tert-Butanol ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2-Butanone(MEK) ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 n-Butylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 sec-Butylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 tert-Butylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Carbon Disulfide ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Carbon Tetrachloride ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chloroethane ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chloroform ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Chloromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2-Chlorotoluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 4-Chlorotoluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Dibromochloromethane ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Dibromomethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3-Dichlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,4-Dichlorobenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Dichlorodifluoromethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1-Dichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1-Dichloroethylene I ND 1 0.5 1 ug/L I I 5030B 07/01/21:207378 8260B 07/01/21:210107 Page 9 of 17 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 July 29, 2021 Lab ID : SP 2108497-003 Description : HPR Harvey Place Reservoir Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 cis-1,2-Dichloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 trans-1,2-Dichloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2-Dichloropropane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3-Dichloropropane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2,2-Dichloropropane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1-Dichloropropene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3-Dichloropropene(Total) ND -- ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 cis-1,3-Dichloropropene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 trans-1,3-Dichloropropene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Di-isopropyl ether(DIPE) ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Ethyl Benzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Ethyl tert-butyl ether ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 (ETBE) Hexachlorobutadiene ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 2-Hexanone ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Isopropylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 p-Isopropyltoluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Methyl tert-butyl ether ND 0.2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 (MTBE) 4-Methyl-2-pentanone ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 (MIBK) Methylene Chloride ND 5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Naphthalene ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 n-Propylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Styrene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 tert-Amyl methyl ether (TAME) ND 5 ug/L 5030B 07/01/21:207378 8260B 07i01i21:210107 1,1,1,2-Tetrachloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1,2,2-Tetrachloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Tetrachloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Toluene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2,3-Trichlorobenzene ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2,4-Trichlorobenzene ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1,1-Trichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,1,2-Trichloroethane ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Trichloroethylene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Trichlorofluoromethane ND 1 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,2,4-Trimethylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 1,3,5-Trimethylbenzene ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Vinyl Acetate ND 10 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Vinyl Chloride ND 0.5 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Xylenes ND -- ug/L 5030B 07/01/21:207378 8260B L11 Page 10 of 17 July 29, 2021 Lab ID : SP 2108497-003 Description : HPR Harvey Place Reservoir Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 Xylenes m,p ND 2 ug/L 5030B 07/01/21:207378 8260B 07/01/21:210107 Xylenes o ND 2 ug/L 5030B 07/01/2 1:207378 8260B 07/01/21:210107 ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.*PQL adjusted for dilution. Page 11 of 17 .O "AGRICULTURAL Analytical Chemists July 29, 2021 Lab ID : SP 2108497 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic 1,1,1,2-Tetrachloroethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank a /L ND <0.5 1,1,1-Trichloroethane(TCA) 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 1,1,2,2-Tetrachloroethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 1,1,2-Trichloroethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank I u /L ND <0.5 1,1-Dichloroethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 1,1-Dichloroethylene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 LCS ug/L 25.00 102% 52-137 MS ug/L 25.00 131% 25-179 (SP 2108497-001) MSD ug/L 25.00 125% 25-179 MSRPD u /L 0.000 4.6% 1 <26 1,1-Dichloropropee 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank a /L ND <0.5 1,2,3-Trichlorobenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 250 Blank u /L ND <10 1,2,4-Trichlorobenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 250 Blank u /L ND <10 1,2,4-Trimethylbenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 1,2-Dichlorobenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 1,2-Dichloroethane(EDC) 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 1,2-Dichloroethane-d4 5030B 07/01/21:207378VRG ExBlk ug/L 0.0% N/A Blank ug/L 25.00 103% 70-129 LCS ug/L 25.00 108% 70-129 MS ug/L 25.00 108% 70-129 (SP 2108497-001) MSD ug/L 25.00 108% 70-129 MSRPD u /L 0.000 0.5% 1 520.0 1,2-Dichloropropane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 1,3,5-Trimethylbenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 1,3-Dichlorobenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 1,3-Dichloropropane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 1,4-Dichlorobenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 2-Dichloropropane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 Butanone(MEK) 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 250 Blank u /L ND <10 Chlorotoluene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 Hexanone 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 250 Blank u /L ND <10 Bromofluorobenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.0% N/A Blank ug/L 25.00 103% 81-112 LCS u /L 25.00 1 105% 81-112 Page 12 of 17 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 July 29, 2021 Lab ID : SP 2108497 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic 4-Bromofluorobenzene 5030B MS ug/L 25.00 105% 0-200 (SP 2108497-001) MSD ug/L 25.00 105% 0-200 MSRPD a /L 0.000 0.3% <20.0 Chlorotoluene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank a /L ND <0.5 Methyl-2-pentanone(MIBK) 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 250 Blank u /L ND <10 Acetone 5030B 07/01/21:207378VRG ExBlk ug/L 332.6 1250 Blank ug/L ND <50 crolein 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 1250 Blank ug/L ND 1 <50 Acrylonitrile 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 1250 Blank u /L ND <50 Benzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 LCS ug/L 25.00 103% 60-134 MS ug/L 25.00 120% 47-169 (SP 2108497-001) MSD ug/L 25.00 117% 47-169 MSRPD ug/L 0.000 3.0% <24 romobenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 romochloromethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 romodichloromethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 romoform 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 50 Blank u /L ND <2 romomethane(Methyl Bromide) 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 Carbon Disulfide 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 250 Blank ug/L ND <10 Carbon Tetrachloride 5030B 07/01/21:207378VRG ExBlk ug/L 0.00 25 Blank u /L ND <1 Chlorobenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 LCS ug/L 25.00 90.7% 56-152 MS ug/L 25.00 102% 31-212 (SP 2108497-001) MSD ug/L 25.00 98.5% 31-212 MSRPD u /L 0.000 1 3.6% <27 Chloroethane(Ethyl Chloride) 5030B 07/01/21:207378VRG ExBlk ug/L 0.00 25 Blank u /L ND <1 Chloroform 5030B 07/01/21:207378VRG ExBlk ug/L 0.00 25 Blank u /L ND <1 Chloromethane(Methyl Chloride) 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 cis-1,2-Dichloroethylene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank I ug/L ND <0.5 cis-1,3-Dichloropropene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 ibromochloromethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 50 Blank u /L ND <2 ibromofluromethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.0% N/A Blank ug/L 25.00 109% 67-133 LCS ug/L 1 25.00 1 108% 67-133 Page 13 of 17 July 29, 2021 Lab ID : SP 2108497 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Conc. QC Data DQO Note Organic Dibromofluromethane 5030B MS ug/L 25.00 108% 67-133 (SP 2108497-001) MSD ug/L 25.00 109% 67-133 MSRPD ug/L 0.000 0.4% <20.0 Dibromomethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 Dichlorodifluoromethane 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND 1 <0.5 ichloromethane 5030B 07/01/21:207378VRG ExBlk ug/L 27.26 125 Blank ug/L ND <5 Ethyl tert-Butyl Ether 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 50 Blank ug/L ND <2 thylbenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u ND <0.5 reon-II 5030B 07/01/21:207378VRG ExBlk ug/L 0.00 25 Blank ug/L ND <1 exachlorobutadiene 5030B 07/01/21:207378VRG ExBlk ug/L 0.00 125 Blank ug/L ND <5 Isopropyl Ether 5030B 07/01/21:207378VRG ExBlk ug/L 0.00 125 Blank ug/L ND <5 sopropylbenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 Methyl tert-Butyl Ether(MTBE) 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 50 Blank ug/L ND <2 Naphthalene 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 250 Blank ug/L ND <10 Butylbenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 Propylbenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 Isopropyltoluene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 sec-Butylbenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 Styrene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u ND <0.5 TAME 5030B 07/01/21:207378VRG ExBlk ug/L 0.00 125 Blank ug/L ND <5 ert-Butanol 5030B 07/01/21:207378VRG ExBlk ug/L 0.00 125 Blank ug/L ND <5 ert-Butylbenzene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 etrachloroethylene(PCE) 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 Toluene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 LCS ug/L 25.00 112% 56-131 MS ug/L 25.00 131% 44-164 (SP 2108497-001) MSD ug/L 25.00 122% 44-164 MSRPD a 0.000 6.4% 1 <30 Toluene-d8 5030B 07/01/21:207378VRG ExBlk ug/L 0.0% N/A Blank ug/L 25.00 108% 71-119 LCS ug/L 25.00 114% 71-119 MS ug/L 25.00 112% 71-119 (SP 2108497-001) MSD ug/L 25.00 111% 71-119 Page 14 of 17 July 29, 2021 Lab ID : SP 2108497 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic Toluene-d8 5030B 07/01/21:207378VRG MSRPD ug/L 0.000 1.2% <20 trans-1,2-Dichloroethylene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 ans-1,3-Dichloropropene 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 richloroethylene(TCE) 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank ug/L ND <0.5 LCS ug/L 25.00 105% 61-123 MS ug/L 25.00 123% 41-167 (SP 2108497-001) MSD ug/L 25.00 117% 41-167 MSRPD u /L 0.000 4.9% 1 <32 Vinyl Acetate 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 250 Blank a /L ND <10 Vinyl Chloride 5030B 07/01/21:207378VRG ExBlk ug/L 0.000 12.5 Blank u /L ND <0.5 ylenes m,p 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 50 Blank u /L ND <2 ylenes o 5030B 07/01/21:207378VRG ExBlk ug/L 0.0 50 Blank ug/L ND <2 1,1,1,2-Tetrachloroethane 8260B 07/01/21:210107VRG CCV u /L 25.00 81.0% 70-130 1,1,1-Trichloroethane(TCA) 8260B 07/01/21:210107VRG CCV ug/L 25.00 115% 70-130 1,1,2,2-Tetrachloroethane 8260B 07/01/21:210107VRG CCV u /L 25.00 82.0% 70-130 1,1,2-Trichloroethane 8260B 07/01/21:210107VRG CCV ug/L 25.00 100% 70-130 1,1-Dichloroethane 8260B 07/01/21:210107VRG CCV u /L 25.00 121% 70-130 1,1-Dichloroethylene 8260B 07/01/21:210107VRG CCV ug/L 25.00 97.8% 80-120 1,1-Dichloro ro ene 8260B 07/01/21:210107VRG CCV I u /L 25.00 92.0% 70-130 1,2,3-Trichlorobenzene 8260B 07/01/21:210107VRG CCV ug/L 25.00 29.8% 70-130 380 1,2,4-Trichlorobenzene 8260B 07/01/21:210107VRG CCV u /L 25.00 62.2% 70-130 380 1,2,4-Trimethylbenzene 8260B 07/01/21:210107VRG CCV ug/L 25.00 113% 70-130 1,2-Dichlorobenzene 8260B 07/01/21:210107VRG CCV u /L 25.00 95.1% 70-130 1,2-Dichloroethane(EDC) 8260B 07/01/21:210107VRG CCV ug/L 25.00 103% 70-130 1,2-Dichloroethane-d4 8260B 07/01/21:210107VRG CCV u /L 25.00 103% 70-130 1,2-Dichloropropane 8260B 07/01/21:210107VRG CCV ug/L 25.00 96.5% 80-120 1,3,5-Trimeth lbenzene 8260B 07/01/21:210107VRG CCV u /L 25.00 107% 70-130 1,3-Dichlorobenzene 8260B 07/01/21:210107VRG CCV ug/L 25.00 93.3% 70-130 1,3-Dichloro ro ane 8260B 07/01/21:210107VRG CCV u /L 25.00 79.9% 70-130 1,4-Dichlorobenzene 8260B 07/01/21:210107VRG CCV ug/L 25.00 83.1% 70-130 2-Dichloro ro ane 8260B 07/01/21:210107VRG CCV u /L 25.00 196% 70-130 360 Butanone(MEK) 8260B 07/01/21:210107VRG CCV ug/L 80.00 146% 50-150 Chlorotoluene 8260B 07/01/21:210107VRG CCV u /L 25.00 102% 70-130 Hexanone 8260B 07/01/21:210107VRG CCV ug/L 80.00 200% 50-150 360 Bromofluorobenzene(BFB) 8260B 07/01/21:210107VRG CCV u /L 25.00 109% 70-130 Chlorotoluene 8260B 07/01/21:210107VRG CCV ug/L 25.00 89.9% 70-130 Meth 1-2- entanone(M113K) 8260B 07/01/21:210107VRG CCV u /L 80.00 189% 50-150 360 Acetone 8260B 07/01/21:210107VRG CCV ug/L 80.00 143% 50-150 crolein 8260B 07/01/21:210107VRG CCV u /L 20.00 863% 50-150 360 crylonitrile 8260B 07/01/21:210107VRG CCV ug/L 20.00 1580% 50-150 360 Benzene 8260B 07/01/21:210107VRG CCV u /L 25.00 94.4% 70-130 romobenzene 8260B 07/01/21:210107VRG CCV ug/L 25.00 83.8% 70-130 romochloromethane 8260B 07/01/21:210107VRG CCV u /L 25.00 103% 70-130 romodichloromethane I 8260B 07/01/21:210107VRG CCV I ug/L 25.00 95.8% 70-130 romoform I 8260B 07/01/21:210107VRG CCV I u /L 25.00 75.4% 70-130 romomethane(Methyl Bromide) I 8260B 07/01/21:210107VRG CCV I ug/L 25.00 89.3% 70-130 Page 15 of 17 July 29, 2021 Lab ID : SP 2108497 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units Cone. QC Data DQO Note Organic Carbon Disulfide 8260B 07/01/21:210107VRG CCV ug/L 80.00 126% 50-150 Carbon Tetrachloride 8260B 07/01/21:210107VRG CCV a 25.00 90.0% 70-130 Chlorobenzene 8260B 07/01/21:210107VRG CCV I ug/L 25.00 85.0% 70-130 Chloroethane(Ethyl Chloride) 8260B 07/01/21:210107VRG CCV a 25.00 84.8% 70-130 Chloroform 8260B 07/01/21:210107VRG CCV ug/L 25.00 104% 80-120 Chloromethane(Meth 1 Chloride) 8260B 07/01/21:210107VRG CCV u 25.00 149% 70-130 360 cis-1,2-Dichloroethylene 8260B 07/01/21:210107VRG CCV ug/L 25.00 112% 70-130 cis-1,3-Dichloro ro ene 8260B 07/01/21:210107VRG CCV a 25.00 107% 70-130 ibromochloromethane 8260B 07/01/21:210107VRG CCV ug/L 25.00 76.0% 70-130 ibromofluromethane 8260B 07/01/21:210107VRG CCV a 25.00 107% 70-130 ibromomethane 8260B 07/01/21:210107VRG CCV ug/L 25.00 97.0% 70-130 ichlorodifluoromethane 8260B 07/01/21:210107VRG CCV u 25.00 116% 70-130 ichloromethane 8260B 07/01/21:210107VRG CCV ug/L 25.00 97.8% 70-130 Ethyl tert-Butyl Ether 8260B 07/01/21:210107VRG CCV a 25.00 159% 50-150 360 thylbenzene 8260B 07/01/21:210107VRG CCV ug/L 25.00 84.2% 80-120 exachlorobutadiene 8260B 07/01/21:210107VRG CCV a 25.00 82.6% 70-130 Isopropyl Ether 8260B 07/01/21:210107VRG CCV I ug/L 25.00 168% 50-150 360 Isooropylbenzene 8260B 07/01/21:210107VRG CCV u 25.00 101% 70-130 Methyl tert-Butyl Ether 8260B 07/01/21:210107VRG CCV ug/L 25.00 154% 70-130 360 Naphthalene 8260B 07/01/21:210107VRG CCV a 25.00 1 43.2% 70-130 380 Butylbenzene 8260B 07/01/21:210107VRG CCV ug/L 25.00 118% 70-130 n-Propylbenzene 8260B 07/01/21:210107VRG CCV a 25.00 102% 70-130 Isopropyltoluene 8260B 07/01/21:210107VRG CCV ug/L 25.00 115% 70-130 sec-Butylbenzene 8260B 07/01/21:210107VRG CCV u 25.00 107% 70-130 Styrene 8260B 07/01/21:210107VRG CCV ug/L 25.00 84.9% 70-130 TAME 8260B 07/01/21:210107VRG CCV a 25.00 159% 50-150 360 ert-Butanol 8260B 07/01/21:210107VRG CCV ug/L 125.0 122% 50-150 ert-But lbenzene 8260B 07/01/21:210107VRG CCV a 25.00 116% 70-130 etrachloroethylene(PCE) 8260B 07/01/21:210107VRG CCV ug/L 25.00 70.2% 70-130 Toluene 8260B 07/01/21:210107VRG CCV u 25.00 105% 80-120 Toluene-d8 8260B 07/01/21:210107VRG CCV ug/L 25.00 116% 70-130 trans-1,2-Dichloroeth lene 8260B 07/01/21:210107VRG CCV u 25.00 101% 70-130 ans-1,3-Dichloropropene 8260B 07/01/21:210107VRG CCV ug/L 25.00 109% 70-130 richloroeth lene(TCE) 8260B 07/01/21:210107VRG CCV a 25.00 92.2% 70-130 richlorofluoromethane F-11 8260B 07/01/21:210107VRG CCV a 25.00 81.6% 70-130 Vinyl Acetate 8260B 07/01/21:210107VRG CCV ug/L 80.00 148% 50-150 Vinyl Chloride 8260B 07/01/21:210107VRG CCV a 25.00 104% 80-120 ylene m,p 8260B 07/01/21:210107VRG CCV ug/L 50.00 86.3% 70-130 [Xylenes o 8260B 07/01/21:210107VRG I CCV I a 25.00 1 92.8% 1 70-130 Definition CCV :Continuing Calibration Verification-Analyzed to verify the instrument calibration is within criteria. Blank :Method Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. EXBlk :TCLP/STLC Extraction Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. LCS :Laboratory Control Standard/Sample-Prepared to verify that the preparation process is not affecting analyte recovery. MS Matrix Spikes-A random sample is spiked with a known amount of analyte.The recoveries are an indication of how that sample matrix affects analyte recovery. MSD :Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyte.The recoveries are an indication of how that sample matrix affects analyte recovery. MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation and analysis. ND :Non-detect-Result was below the DQO listed for the analyte. DQO :Data Quality Objective-This is the criteria against which the quality control data is compared. Explanation 360 :CCV above Acceptance Range(AR).Samples which were non detect for this analyte were accepted. Page 16 of 17 July 29, 2021 Lab ID : SP 2108497 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Explanation 380 :CCV met CCC and SPCC criteria,Results were reported. Page 17 of 17 yy r�J IF IL ENVIRONMENTAL 7-- iAIJINICULTURAL www.fglinc.com CHAIN OF CUSTODY Page 1 of 1 AND ANAL YSES REQUEST FORM Chain of Custady Information Sample Type lnformatton Test Descriptlon(s) Lab Number: SP 2108497 2011369 Client: South Tahoe Public Utility District 3 Address: 1275 Meadow Crest Drive y South Lake Tahoe,CA 96150 3 c� Cn a Phone:(530)543-6231 Fax:(530)5414296 Contact: Dan Arce Project: AG78156,AG78155,AG78157 (1) `CAI Purchase Order: a z o Sampler(s): Arce/Chernago/Uribe a o is o p �. m 4 � O a 0 o o a o x Compositor Setup Date: Time: n4.4 N 0 0 ao N�nmp Iacat1=DesaW1= Data d 451me ! a° as as ooG W ampM. 1 DD-01 Diamond Ditch@Beginning 06/23/2021 10:13 G WW 2 WW-05 Final Grab 06/23/2021 10:46 G WW 3 HPR Harvey Place Reservoir 06/23/2021 13:32 G WW Remarks Relinquished Date Time Relinquished Date Time Relinquished Date Time Report MTBE to 0.2 ug/L Federal Express 6/25/21-Combined the COCs SP2108461, SP2108464 Received By: Date Time Received By: Date Time Received By: Date Time and SP2108466 per customer request. Shawn Peck 06/24/2021 11:50 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Offioo&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Undo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 CHAIN OF CUSTODY 7275Meadow oe Public Utility District Lab Sent FGL Preservatives: Turn-Around-Time: Crest Drive , •- VOC-HCI Standard e Tahoe,CA 96150 - Sampler(s): D.Arce Phone:(530)-543-6231 +'••�.,,,,•+��`', B.Chernago K. Uribe co N d {L 1 Collection ;, Lab ID# Sample Site Date&Time o AG78166 DD-01 Diamond Ditch @ Beginning Start of Diamond Ditch;at HPR 06/23/2021 10:13 WIN x outlet Notes: Relinquished by: Received by: Report MTBE to 0.2 ug/L Analyze Travel and Field Blanks only if VOCs detected in samples. Signature Signature Use Calif State WriteOn to report&upload results of Potable Water Wells. Print <.ZV,%n V•'Ob-c Print Company South Tahoe Public Utility District Company Please Return all STPUD ice chests & Blue Ice Date: d(f--Z3.2/ Time: 110J Date: Time: Comments: Relinquished by: Receive Signature Signature Print Print Company Company Date: Time: Date: Time: 1 1 �� Page 1 of 1 CHAIN OF CUSTODY )04�-44 F1275 oe Public Utility District Lab Sent FGL Preservatives: Turn-Around-Time: dow Crest Drive Sam ler s Cherna O4CStandard e Tahoe,CA 96150 p ( � B• 9 VOC -HCI 30)-543-6231 „DI 0 co lV Q W a J Collection Lab ID# Sample Site p Date&Time o AG78155 WW-05 Final Grab 06/23/2021 13:32 WW FNotes: Relinquished by: Received by: MTBE to 0.2 ug/L e Travel and Field Blanks only if VOCs detected in samples. Signature 0;'� 'z9 t w Signature Use Calif State WriteOn to report&upload results of Potable Water Wells. Print Print Company South Tahoe Public Utility District Company Please Return all STPUD ice chests & Blue Ice Date: ol_a•z 3-z-, Time: /10) Date: Time: Comments: Relinquished by: Receive Signature Signature Print Print Company Compan Date: Time: Date: Time. rC Page 1 of 1 CHAIN OF CUSTODY F1275Meadow oe Public Utility District o Lab Sent FGL. Preservatives: urn-Around-Time_ Crest Drive ASampler(s): p, VOC-HCI Standard e Tahoe,CA 96150 Arce30}-543-6231 •�•its •w•'• B.Chernago K. Uribe co !V co a w a Collection Lab ID# Sample Site p Date&Time o AG78157 HPR Harvey Place Reservoir 06/2312021 10:46 ww x 6 V)C'1/S Notes: Relinquished by: Received by: Report MTBE to 0.2 ug/L _Analyze Travel and Field Blanks only if VOCs detected in samples. Signature olL -- � � Signature Use Calif State WriteOn to report&upload results of Potable Water Wells. Print v� (A';'k-e Print Company South Tahoe Public Utility District Company Please Return all STPUD ice chests & Blue Ice Date: �-Z3•Z1 Time: No Date: Time: Comments: Relinquished by: ReceivedAQ"'-)� Signature Signature Print A k JA Print Company Company Date: Time: Date: V Time: UL Page 1 of 1 Fwd:Fwd:Recently Sent Samples South Tahoe PUD FGL Acc... Subject: Fwd: Fwd: Recently Seat Samples Soutk Tahoe PUD FGL Acct #z01136q From: David Terz <davidt@Fgl inc.com> Date: 6/2-4/2-02-21 5:2-7 PM To: Login Santa Paula <loginSp@Fgl iKC.com> CC: Vickie Taylor <vickiet@Fglinc.com>, Crlenn Olsen <glenno@Fglinc.com> Login- Please create a new lab number combing the information for the COCs SP2108461, SP2108464 and SP2108466. Customer wants all three on on report. you'll have to pull and combine the original COCs and CURs into one file and assign to the new COC. Under login remarks, note that we combined the COCs SP2108461, SP2108464 and SP2108466 per customer request. Send me lab number when done. Vickie- Hide the posted reports. And recall the invoice. Regards, David Terz QA Director Fruit Growers Laboratory 805-392-2024 -------- Forwarded Message -------- Subject:Fwd: Recently Sent Samples South Tahoe PUD FGL Acct#2011369 Date:Th u, 24 Jun 2021 16:53:11 -0700 From:Vickie Taylor<vickiet@fglinc.com> To:David Terz <davidt@fglinc.com> Hi David, please see the request in the email below from Dan Arce at South Tahoe PUD. They left us without notice in 2019 and they have given us very little volume of work since. Currently we have one COC from Feb 2021 plus the three COCs mentioned below. Do you want to respond regarding his request to report 3 different lab numbers in one report and 1 of 2 6/25/2021,9:10 AM Fwd:Fwd:Recently Sent Samples South Tahoe PUD FGL Acc... invoice them on one invoice like as if they were all on the same COC? Sincerely, Vickie Taylor Vickie Taylor Corporate Office Manager 805-392-2010 www.fglinc.com Together we become the best version of ourselves -------- Forwarded Message-------- Subject:Recently Sent Samples Date:Th u, 24 Jun 2021 22:17:42 +0000 From:Dan Arce <darce stpud.dst.ca.us> To:Vickie Taylor vickiet@fglinc.com} <vickiet@fglinc.com> Hello Ms.Vickie Taylor We sent you three samples yesterday for Full 8260 analysis. Each sample came with its own individual Chain of Custody.The COC_IDs assigned by FGL are:SP2108461,SP2108464 and SP2108466. Please combine all three sets of results into a single Report and Invoice if possible as if all three had come with a single COC. Thank you Vickie. I hope you are having a good Summer. Dan Arce Lab Director South Tahoe Public Utility District 1275 Meadow Crest Drive South Lake Tahoe,CA 96150 Office:530.543.6231 Cell: 530.318.1477 This email message has been delivered safely and archived online by Mimecast. 2 of 2 6/25/2021,9:10 AM FGL Environmental Doc ID: 2D0900157 SOP 17.DOC Revision Date: 10/09/14 Page: 1 of 1 Condition Upon Receipt (Attach to COC) Sample Receipt at SP: 1. Number of ice chests/packages received: 1 2• Shipper tracking numbers 774075833301 3.Were samples received in a chilled condition? Temps: 6 4.Surface water(SWTR)bact samples:A sample that has a temperature upon receipt of>10C,whether iced or not, should be flagged unless the time since sample collection has been less than two hours. 5. Do the number of bottles received agree with the Yes No N/A COC? 6.Verify sample date,time, sampler Yes No N/A 7.Were the samples received intact? (i.e. no broken Yes No bottles, leaks, etc.) 8.Were sample custody seals intact? Yes No N/A Sample Verification, Labeling and Distribution: 1.Were all requested analyses understood and Yes No acceptable? 2. Did bottle labels correspond with the client's ID's? Yes No 3.Were all bottles requiring sample preservation Yes No N/A FGL properly preserved? [Exception:Oil&Grease,VOA and CrVI verified in lab] 4.VOAs checked for Headspace? Yes No N/A 5.Were all analyses within holding times at time of Yes No receipt? 6. Have rush or project due dates been checked and Yes No N/A accepted? Include a copy of the COC for lab delivery. (Bacti. Inorganics and Radio) Sample Receipt, Login and Verification completed by: Reviewed and Digitally signed by Shawn Peck Shawn Peck Title:Sample Receiving Approved By Date:07/15/2021-09:04:14 Discrepency Documentation: Any items above which are"No"or do not meet specifications (i.e.temps)must be resolved. 1. Person Contacted: Phone Number: Initiated By: Date: Problem: Resolution: 2. Person Contacted: Phone Number: Initiated By: Date: Problem: Resolution: (2011369) South Tahoe Public Utility District SP 2108497 SRP-07/15/2021-09:04:14 Alpine County Summary Report Temp pH EC DO Alk TDS SS Turb Chloride Sulfate ACMW-01AW 04/13/2021 Main Dam 7.7 6.89 71.1 26.6 57 3.11 2.21 ACMW-01BE 04/13/2021 Secondary Dam 8.5 6.53 110 50.5 84 1.46 1.93 ACMW-02N 04/13/2021 Access Gate 13.6 6.47 128 57.0 88 1.63 2.81 ACMW-02S 04/13/2021 Access Gate 11.7 6.26 125 57.7 84 1.39 3.17 ACMW-04W 04/13/2021 Gansberg 12.3 6.38 170 45.3 119 11.3 13.1 ACMW-06S 04/13/2021 Cello 12.6 7.25 596 181 352 61.4 21.6 ACMW-08N O5/20/2021 Diamond Valley Ranch 12.1 6.99 150 70.6 113 1.93 0.879 ACMW-09D 06/03/2021 Diamond Valley Ranch 13.9 6.50 76.6 30.8 81 1.51 2.05 ACMW-10 06/03/2021 Diamond Valley Ranch 12.9 6.54 192 86.7 131 3.70 2.77 ACMW-11 06/03/2021 Diamond Valley Ranch 11.7 6.59 91.4 34.9 72 2.74 2.86 ACMW-12 05/20/2021 Diamond Valley Ranch 11.0 6.80 110 45.9 89 2.11 2.21 ACMW-13 05/20/2021 Diamond Valley Ranch 9.2 6.38 123 50.6 91 2.24 2.43 ACMW-14 06/03/2021 Diamond Valley Ranch 11.5 6.16 71.9 34.1 64 0.863 1.55 ACMW-15 06/08/2021 Diamond Valley Ranch 12.2 6.34 63.8 27.1 46 1.53 1.65 ACMW-16 06/08/2021 Diamond Valley Ranch 11.9 6.45 115 46.7 78 2.22 2.34 ACMW-17 06/08/2021 Diamond Valley Ranch 10.4 6.89 78.7 30.2 63 2.06 2.85 ACMW-18 06/08/2021 Diamond Valley Ranch 12.3 6.60 85.2 30.6 59 2.58 1.98 ACMW-19 06/08/2021 Diamond Valley Ranch 11.9 6.97 204 101 125 2.78 0.867 ACMW-20 05/20/2021 Diamond Valley Rd- 11.0 6.37 99.8 31.8 75 2.36 2.68 Paynesville ACMW-21 04/27/2021 River Ranch Rd 8.8 6.56 102 33.3 63 4.89 3.58 ACMW-22 04/27/2021 Fredericksburg Ln 11.4 6.25 103 44.3 70 1.11 2.94 ACMW-23 04/27/2021 Scott Brooke's Ranch by 14.1 7.34 378 172 258 3.63 20.1 Irrigation Ditch ACMW-24 04/27/2021 Scott Brooke's Ranch by 12.3 6.72 630 175 367 49.5 44.7 Irrigation Ditch ACMW-25 04/27/2021 Access road between 10.7 6.42 153 45.3 110 8.86 5.29 Neddenriep&Brooke ranches ACMW-26 04/27/2021 Access road between 9.7 6.46 168 40.6 124 12.8 10.6 Neddenriep&Brooke ranches CONTROL 04/20/2021 East side near Post Office 9.5 7.78 245 23.3 DD-01 06/23/2021 Diamond Ditch @ Beginning 17.1 7.96 608 2.78 ERB 04/07/2021 ERB 11.2 7.63 656 53.8 GW-05 06/03/2021 Neddenriep 13.8 6.52 274 60.2 181 29.3 9.86 GW-08 06/03/2021 Arent Ranch house 17.2 6.13 397 41.6 271 46.2 11.6 GW-11 05/20/2021 Diamond Valley School 14.0 6.95 141 69.2 115 0.954 0.757 GW-17 05/20/2021 Diamond Valley Ranch House 11.3 6.82 132 59.0 104 1.73 0.967 Well HPR 04/01/2021 Harvey Place Reservoir 12.1 7.95 582 8.48 176 257 4.08 1.3 57.5 20.0 05/04/2021 Harvey Place Reservoir 14.9 8.60 580 15.73 168 261 9.90 2.9 61.3 17.3 O5/11/2021 Harvey Place Reservoir 16.6 8.94 564 22.54 06/23/2021 Harvey Place Reservoir 21.4 8.59 576 6.68 152 277 5.58 4.3 60.2 18.6 06/29/2021 Harvey Place Reservoir 23.7 8.68 543 19.79 HVC-1 04/27/2021 HVC @ Pioneer Trail 5.2 7.46 53.5 1.14 O5/18/2021 HVC @ Pioneer Trail 9.7 7.03 36.0 1.12 Results respoded as mg/L except EC as uS/cm Turbidity as NTU Cordoms as MPN/100ml- Temp as C NC=Not counted Page 1 of 8 Alpine County Summary Report Temp pH EC DO All, TDS SS Turb Chloride Sulfate HVC-1 06/29/2021 HVC @ Pioneer Trail 16.4 7.68 44.8 1.08 HVC-2 04/27/2021 HVC 250'Upstream Pond#2 7.5 6.37 65.7 1.83 O5/18/2021 HVC 250'Upstream Pond#2 16.1 7.08 36.5 1.62 MW01_5 04/20/2021 SW comer of ERB 8.8 7.34 157 1.89 MW02-50 04/20/2021 South side of ERB Pond 9.9 7.88 248 27.6 MW03-50 04/20/2021 Southwest comer of ERB Pond 10.0 7.01 296 48.9 MW04-50 04/20/2021 Hank Monk side of ERB 8.3 7.08 80.0 5.08 MW07-50 04/20/2021 North side of ERB Pond 8.8 7.21 160 10.5 MWOB-25 04/20/2021 South of Pond 1 9.2 7.35 409 24.1 MW11 04/20/2021 North of Biosolids building 11.1 6.14 431 90.6 MW12 04/20/2021 South of Biosolids Building 13.5 6.59 258 8.90 MW13 04/20/2021 South of Pond 2 along HVC 5.7 7.08 587 19.3 SW-01 04/06/2021 Carson River Woodfords 4.4 7.68 56.5 10.52 24.4 48 8.95 3.7 2.93 2.76 05/11/2021 Carson River Woodfords 9.2 7.64 46.2 9.54 22.7 41 6.37 1.9 1.12 1.52 06/23/2021 Carson River Woodfords 14.2 7.59 57.5 8.53 34.3 53 1.88 0.82 1.41 1.81 SW-02 04/06/2021 Indian Creek Upper 6.2 7.62 82.3 9.13 40.0 71 2.62 1.6 2.17 0.771 05/11/2021 Indian Creek Upper 13.3 7.94 90.5 4.99 45.5 74 0.44 1.3 2.11 0.736 SW-03 04/06/2021 Indian Creek Mid 8.8 6.86 119 9.01 56.6 93 1.51 2.3 3.25 2.81 O5/11/2021 Indian Creek Mid 14.5 7.35 177 8.36 86.9 125 7.23 3.7 3.32 2.66 06/23/2021 Indian Creek Mid 19.6 7.50 195 6.25 90.0 133 28.4 13 3.75 2.11 SW-04 04/06/2021 Indian Creek Lower 8.6 7.47 143 10.39 72.3 112 5.11 2.4 2.65 2.23 05/11/2021 Indian Creek Lower 13.3 7.41 168 10.17 88.7 138 1.89 2.2 1.88 1.88 06/23/2021 Indian Creek Lower 22.4 7.68 161 8.44 80.8 127 6.14 4.1 2.74 1.30 SW-05 04/06/2021 Carson River Paynesville 6.3 7.72 61.7 10.31 25.2 54 11.4 4.2 2.79 2.81 05/11/2021 Carson River Paynesville 9.6 7.68 52.3 9.71 24.4 46 4.63 2.2 1.26 1.72 O6/23/2021 Carson River Paynesville 14.6 7.53 80.1 8.83 36.9 62 2.17 0.96 1.60 1.99 SW-06 04/06/2021 Carson River Stateline 7.4 7.71 64.6 10.34 26.8 57 11.4 4.9 2.85 2.76 05/11/2021 Carson River Stateline 10.5 7.35 56.7 9.63 26.6 52 4.63 2.0 1.52 2.00 06/23/2021 Carson River Stateline 15.6 8.02 83.5 8.64 39.4 63 2.72 1.0 1.72 2.06 SW-08 04/06/2021 Irrigation Ditch 13.4 7.29 125 8.09 60.5 110 0.87 0.39 1.73 3.94 O5/11/2021 Irrigation Ditch 10.2 6.69 111 7.14 51.8 116 2.80 1.4 1.51 2.86 Results resported as mg/L except EC as uS/cm Turbidity as NTU Cordoms as MPN/l00mL Temp as C NC=Not counted Page 2 of 8 Alpine County Summary Report Total P Total P PO4-P NH3-N Total N NO2-N NO3-N TKN Dissolved ACMW-01AW 04/13/2021 Main Dam 0.021 0.023 <0.020 0.138 <0.010 0.076 0.062 ACMW-01BE 04/13/2021 Secondary Dam 0.028 0.041 <0.020 0.230 <0.010 0.191 <0.050 ACMW-02N 04/13/2021 Access Gate 0.019 0.022 <0.020 0.249 <0.010 0.154 0.095 ACMW-02S 04/13/2021 Access Gate 0.018 0.036 <0.020 0.110 <0.010 <0.010 0.110 ACMW-04W 04/13/2021 Gansberg 0.021 0.030 <0.020 1.68 <0.020 1.75 <0.050 ACMW-06S 04/13/2021 Cello 0.090 0.091 <0.020 0.199 <0.020 0.060 0.139 ACMW-08N 05/20/2021 Diamond Valley Ranch 0.039 0.038 <0.020 0.545 <0.010 0.516 <0.050 ACMW-09D 06/03/2021 Diamond Valley Ranch 0.070 0.052 <0.020 0.752 <0.020 0.777 <0.050 ACMW-10 06/03/2021 Diamond Valley Ranch 0.042 0.032 <0.020 0.301 <0.020 0.299 <0.050 ACMW-11 06/03/2021 Diamond Valley Ranch 0.021 <0.020 <0.020 0.613 <0.020 0.621 <0.050 ACMW-12 05/20/2021 Diamond Valley Ranch 0.030 0.025 <0.020 0.688 <0.010 0.623 0.065 ACMW-13 05/20/2021 Diamond Valley Ranch 0.021 <0.030 <0.020 1.34 <0.030 1.28 0.06 ACMW-14 06/03/2021 Diamond Valley Ranch 0.019 0.015 <0.020 0.097 <0.010 0.089 <0.050 ACMW-15 06/08/2021 Diamond Valley Ranch 0.028 0.028 <0.020 0.149 <0.010 0.116 <0.050 ACMW-16 06/08/2021 Diamond Valley Ranch 0.048 0.043 <0.020 0.838 <0.010 0.788 0.050 ACMW-17 06/08/2021 Diamond Valley Ranch 0.025 0.021 <0.020 0.429 <0.010 0.406 <0.050 ACMW-18 06/08/2021 Diamond Valley Ranch 0.028 0.024 <0.020 1.20 <0.010 1.20 <0.05 ACMW-19 06/08/2021 Diamond Valley Ranch 0.091 0.080 0.024 0.119 <0.010 <0.010 0.119 ACMW-20 05/20/2021 Diamond Valley Rd- 0.059 0.053 <0.020 1.09 <0.010 0.984 0.11 Paynesville ACMW-21 04/27/2021 River Ranch Rd 0.071 0.092 <0.020 0.699 <0.030 0.672 <0.05 ACMW-22 04/27/2021 Fredericksburg Ln 0.019 0.021 <0.020 0.531 <0.020 0.522 <0.05 ACMW-23 04/27/2021 Scott Brooke's Ranch by 0.031 0.029 <0.020 1.04 <0.020 1.06 <0.05 Irrigation Ditch ACMW-24 04/27/2021 Scott Brooke's Ranch by 0.071 0.073 <0.020 3.08 <0.030 2.51 0.57 Irrigation Ditch ACMW-25 04/27/2021 Access road between 0.047 0.041 <0.020 1.94 <0.030 2.00 <0.05 Neddenriep&Brooke ranches ACMW-26 04/27/2021 Access road between 0.091 0.091 <0.020 1.63 <0.030 1.26 0.370 Neddenriep&Brooke ranches CONTROL 04/20/2021 East side near Post Office <0.010 4.84 ERB 04/07/2021 ERB 0.198 0.073 GW-05 06/03/2021 Neddenriep 0.042 0.036 <0.020 4.94 <0.010 4.61 0.33 GW-08 06/03/2021 Arant Ranch house 0.103 0.088 <0.020 13.1 <0.010 16.2 <0.050 GW-11 05/20/2021 Diamond Valley School 0.050 0.048 <0.020 0.539 <0.010 0.499 <0.050 GW-17 05/20/2021 Diamond Valley Ranch House 0.031 0.032 <0.020 1.03 <0.020 0.948 0.08 Well HPR 04/01/2021 Harvey Place Reservoir 2.92 3.11 26.1 29.8 0.174 0.934 28.7 05/04/2021 Harvey Place Reservoir 3.00 3.11 24.3 28.2 0.234 0.982 27.0 06/23/2021 Harvey Place Reservoir 3.27 3.20 19.4 22.2 0.554 1.26 20.4 HVC-1 04/27/2021 HVC @ Pioneer Trail <0.020 0.105 <0.010 0.031 0.074 05/18/2021 HVC @ Pioneer Trail <0.020 0.081 <0.010 <0.010 0.081 06/29/2021 HVC @ Pioneer Trail <0.020 0.103 <0.010 0.024 0.079 HVC-2 04/27/2021 HVC 250'Upstream Pond#2 <0.020 0.201 <0.010 <0.010 0.201 05/18/2021 HVC 250'Upstream Pond#2 <0.020 0.403 <0.010 <0.010 0.403 Results resported as mg/L except EC as u&- Turbidity as NTU Cordoms as MPN/100ml- Temp as C NC=Not counted Page 3 of 8 Alpine County Summary Report Total P Total P PO4-P NH3-N Total N NO2-N NO3-N TKN Dissolved MW01 5 04/20/2021 SW comer of ERB <0.010 0.347 MW02-50 04/20/2021 South side of ERB Pond <0.010 1.89 MW03-50 04/20/2021 Southwest corner of ERB Pond <0.020 1.82 MW04-50 04/20/2021 Hank Monk side of ERB <0.010 0.200 MW07-50 04/20/2021 North side of ERB Pond <0.010 0.420 MW08-25 04/20/2021 South of Pond 1 <0.010 0.438 MW11 04/20/2021 North of Biosolids building <0.020 0.125 MW12 04/20/2021 South of Biosolids Building <0.020 0.501 MW13 04/20/2021 South of Pond 2 along HVC <0.010 7.59 SW-01 04/06/2021 Carson River Woodfords 0.033 0.011 <0.020 0.289 <0.010 0.037 0.252 05/11/2021 Carson River Woodfords 0.025 0.010 <0.020 0.158 <0.010 <0.010 0.158 06/23/2021 Carson River Woodfords 0.015 0.013 <0.020 0.064 <0.010 <0.010 0.064 SW-02 04/06/2021 Indian Creek Upper 0.013 0.011 <0.020 0.251 <0.010 <0.010 0.251 05/11/2021 Indian Creek Upper 0.025 0.016 <0.020 0.142 <0.010 <0.010 0.142 SW-03 04/06/2021 Indian Creek Mid 0.048 <0.010 <0.020 0.288 <0.010 0.021 0.267 05/11/2021 Indian Creek Mid 0.070 0.023 <0.020 0.158 <0.010 0.013 0.145 06/23/2021 Indian Creek Mid 0.145 0.043 0.096 0.469 <0.010 0.026 0.443 SW-04 04/06/2021 Indian Creek Lower 0.047 0.010 <0.020 0.203 <0.010 <0.010 0.203 05/11/2021 Indian Creek Lower 0.093 0.035 <0.020 0.622 <0.010 <0.010 0.622 06/23/2021 Indian Creek Lower 0.132 0.046 0.034 0.509 <0.010 <0.010 0.509 SW-05 04/06/2021 Carson River Paynesville 0.042 <0.010 <0.020 0.321 <0.010 0.022 0.299 05/11/2021 Carson River Paynesville 0.025 <0.010 <0.020 0.295 <0.010 <0.010 0.295 06/23/2021 Carson River Paynesville 0.036 <0.010 <0.020 0.070 <0.010 <0.010 0.070 SW-06 04/06/2021 Carson River Stateline 0.044 <0.010 <0.020 0.354 <0.010 0.026 0.328 0 5111/2 0 2 1 Carson River Stateline 0.028 0.012 <0.020 0.238 <0.010 0.024 0.214 06/23/2021 Carson River Stateline 0.065 <0.010 <0.020 0.158 <0.010 0.024 0.134 SW-08 04/06/2021 Irrigation Ditch 0.022 0.010 <0.020 0.290 <0.010 <0.010 0.290 05/11/2021 Irrigation Ditch 0.086 0.041 <0.020 1.16 <0.010 0.016 1.14 Results resported as mg/L except EC as uS/cm Turbidity as NTU Cordoms as MPN/100ml- Temp as C NC=Not counted Page 4 of 8 Alpine County Summary Report BOD Ca Mg Na K SAR %Na ACMW-15 06/08/2021 Diamond Valley Ranch 6.84 1.60 3.38 <1.0 ACMW-16 06/08/2021 Diamond Valley Ranch 11.3 3.13 5.44 3.87 ACMW-17 06/08/2021 Diamond Valley Ranch 7.70 2.15 4.59 <1.0 ACMW-18 06/08/2021 Diamond Valley Ranch 9.07 2.38 3.83 <1.0 ACMW-19 06/08/2021 Diamond Valley Ranch 22.8 6.88 9.50 1.44 HPR 04/01/2021 Harvey Place Reservoir 4.56 18.4 4.47 48.8 12.4 2.65 57.0 O5/04/2021 Harvey Place Reservoir 11.4 18.8 4.69 50.9 13.1 2.72 57.2 06/23/2021 Harvey Place Reservoir NV 19.5 4.94 54.0 13.8 2.83 57.5 06/29/2021 Harvey Place Reservoir 14.6 Results resported as mg/L except EC as uS/cm Turbidity as NTU Cordoms as MPN/100mL Temp as C NC=Not counted Page 5 of 8 Alpine County Summary Report Total E.Coli Coliform Chromo Chromo ACMW-01AW 04/13/2021 Main Dam 411 <1 ACMW-01BE 04/13/2021 Secondary Dam <1 <1 ACMW-02N 04/13/2021 Access Gate <1 <1 ACMW-02S 04/13/2021 Access Gate 8.6 <1 ACMW-04W 04/13/2021 Gansberg <1 <1 ACMW-06S 04/13/2021 Celio <1 <1 ACMW-08N 05/20/2021 Diamond Valley Ranch <1 <1 ACMW-09D 06/03/2021 Diamond Valley Ranch 18.7 <1 ACMW-10 06/03/2021 Diamond Valley Ranch <1 <1 ACMW-11 06/03/2021 Diamond Valley Ranch <1 <1 ACMW-12 05/20/2021 Diamond Valley Ranch <1 <1 ACMW-13 05/20/2021 Diamond Valley Ranch <1 <1 ACMW-14 06/03/2021 Diamond Valley Ranch 6.3 1.0 ACMW-15 06/08/2021 Diamond Valley Ranch 1.0 <1 ACMW-16 06/08/2021 Diamond Valley Ranch <1 <1 ACMW-17 06/08/2021 Diamond Valley Ranch <1 <1 ACMW-18 06/08/2021 Diamond Valley Ranch 4.1 1.0 ACMW-19 06/08/2021 Diamond Valley Ranch <1 <1 ACMW-20 05/20/2021 Diamond Valley Rd- <1 <1 Paynesville ACMW-21 04/27/2021 River Ranch Rd 2.0 <1 ACMW-22 04/27/2021 Fredericksburg Ln <1 <1 ACMW-23 04/27/2021 Scott Brooke's Ranch by <1 <1 Irrigation Ditch ACMW-24 04/27/2021 Scott Brooke's Ranch by <1 <1 Irrigation Ditch ACMW-25 04/27/2021 Access road between <1 <1 Neddenriep&Brooke ranches ACMW-26 04/27/2021 Access road between 326 67.7 Neddenriep&Brooke ranches GW-05 06/03/2021 Neddenriep <1 <1 GW-08 06/03/2021 Arent Ranch house <1 <1 GW-11 05/20/2021 Diamond Valley School <1 <1 GW-17 05/20/2021 Diamond Valley Ranch House <1 <1 Well HPR 04/01/2021 Harvey Place Reservoir 172 <1 05/04/2021 Harvey Place Reservoir 178 1.0 06/23/2021 Harvey Place Reservoir 9100 13.5 SW-01 04/06/2021 Carson River Woodfords 196 1.0 0 5111/2 0 2 1 Carson River Woodfords 115 1.0 06/23/2021 Carson River Woodfords 285 13.4 Results msported as mg/L except EC as uS/cm Turbidity as NTU Cordoms as MPN/100mL Temp as C NC=Not counted Page 6 of 8 Alpine County Summary Report Total E.Coll Coliform Chromo Chromo SW-02 04/06/2021 Indian Creek Upper 47.3 <1 0 5111/2 0 2 1 Indian Creek Upper 291 <1 SW-03 04/06/2021 Indian Creek Mid 93.3 <1 0 5111/2 0 2 1 Indian Creek Mid 326 53.8 06/23/2021 Indian Creek Mid 57900 19400 SW-04 04/06/2021 Indian Creek Lower 687 <1 0 5111/2 0 2 1 Indian Creek Lower 1990 20.3 06/23/2021 Indian Creek Lower 2600 155 SW-05 04/06/2021 Carson River Paynesville 228 2.0 0 5111/2 0 2 1 Carson River Paynesville 261 17.3 06/23/2021 Carson River Paynesville 1200 42.6 SW-06 04/06/2021 Carson River Stateline 236 9.6 0 5111/2 0 2 1 Carson River Stateline 816 21.3 06/23/2021 Carson River Stateline 2100 308 SW-08 04/06/2021 Irrigation Ditch 613 <1 0 5111/2 0 2 1 Irrigation Ditch 1730 21.1 Results resported as mg/L except EC as u&— Turbidity as NTU Cordoms as MPN/100mL Temp as C NC=Not counted Page 7 of 8 Alpine County Summary Report Colonies Colonies Filaments Filaments Filaments Filament Single # #Cells #Multi- #Cells #Single- Length Cells Celled Celled HPR 04/01/2021 Harvey Place Reservoir 0 0 0 0 0 0 0 05/04/2021 Harvey Place Reservoir 0 0 0 0 0 0 0 06/23/2021 Harvey Place Reservoir 0 0 0 0 0 0 0 Results resported as mg/L except EC as u5/cm Turbidity as NTU Collfoms as MPN/100mL Temp as C NC=Not counted Page 8 of 8 Page 1 of 1 Monitoring Wells Groundwater Elevation Sample Depth Ref GW Site Location Date Hr ID# to GW MSL MSL ACMW-01AW Main Dam 04/13/2021 11:50 AG76934 4.92 5493.13 5,488.21 ACMW-01BE Secondary Dam 04/13/2021 11:32 AG76935 9.19 5503.55 5,494.36 ACMW-02N Access Gate 04/13/2021 12:20 AG76936 6.00 5469.70 5,463.70 ACMW-02S Access Gate 04/13/2021 12:31 AG76937 3.72 5471.60 5,467.88 ACMW-04W Gansberg 04/13/2021 10:23 AG76938 18.08 4919.89 4,901.81 ACMW-06S Celio 04/13/2021 11:04 AG76939 15.02 5223.50 5,208.48 ACMW-08N Diamond Valley Ranch 05/20/2021 10:17 AG77605 3.52 5464.45 5,460.93 ACMW-09D Diamond Valley Ranch 06/03/2021 12:08 AG77805 19.64 5510.56 5,490.92 ACMW-10 Diamond Valley Ranch 06/03/2021 12:33 AG77806 22.84 5534.19 5,511.35 ACMW-11 Diamond Valley Ranch 06/03/2021 11:38 AG77807 13.60 5503.01 5,489.41 ACMW-12 Diamond Valley Ranch 05/20/2021 10:51 AG77606 25.92 5525.04 5,499.12 ACMW-13 Diamond Valley Ranch 05/20/2021 11:13 AG77607 10.09 5554.55 5,544.46 ACMW-14 Diamond Valley Ranch 06/03/2021 10:55 AG77808 14.81 5547.20 5,532.39 ACMW-15 Diamond Valley Ranch 06/08/2021 11:51 AG77901 9.61 5500.60 5,490.99 ACMW-16 Diamond Valley Ranch 06/08/2021 12:18 AG77902 9.24 5484.53 5,475.29 ACMW-17 Diamond Valley Ranch 06/08/2021 12:50 AG77903 6.98 5504.92 5,497.94 ACMW-18 Diamond Valley Ranch 06/08/2021 13:20 AG77904 6.11 5470.56 5,464.45 ACMW-19 Diamond Valley Ranch 06/08/2021 13:55 AG77905 7.63 5417.25 5,409.62 ACMW-20 Diamond Valley Rd-Paynesville 05/20/2021 09:47 AG77608 6.79 5090.30 5,083.51 ACMW-21 River Ranch Rd 04/27/2021 12:25 AG77182 13.50 5011.33 4,997.83 ACMW-22 Fredericksburg Ln 04/27/2021 12:46 AG77183 28.39 5019.28 4,990.89 ACMW-23 Scott Brooke's Ranch by Irrigation 04/27/2021 11:51 AG77184 18.40 4978.35 4,959.95 Ditch ACMW-24 Scott Brooke's Ranch by Irrigation 04/27/2021 10:53 AG77185 25.10 4953.25 4,928.15 Ditch ACMW-25 Access road between Neddenriep& 04/27/2021 13:06 AG77186 8.33 4942.24 4,933.91 Brooke ranches ACMW-26 Access road between Neddenriep& 04/27/2021 13:26 AG77187 8.59 4895.60 4,887.01 Brooke ranches CONTROL East side near Post Office 04/20/2021 10:31 AG77048 65.47 6345.20 6,279.73 MW01 5 SW corner of ERB 04/20/2021 14:09 AG77049 59.75 6328.00 6,268.25 MW02-50 South side of ERB Pond 04/20/2021 11:08 AG77050 46.86 6314.60 6,267.74 MW03-50 Southwest corner of ERB Pond 04/20/2021 11:31 AG77051 42.03 6310.10 6,268.07 MW04-50 Hank Monk side of ERB 04/20/2021 11:57 AG77052 35.35 6304.40 6,269.05 MW07-50 North side of ERB Pond 04/20/2021 13:28 AG77053 24.78 6302.20 6,277.42 MW08-25 South of Pond 1 04/20/2021 17:09 AG77054 12.19 6258.30 6,246.11 MW11 North of Biosolids building 04/20/2021 15:28 AG77055 31.11 6296.00 6,264.89 MW12 South of Biosolids Building 04/20/2021 16:07 AG77056 26.04 6288.80 6,262.76 MW13 South of Pond 2 along HVC 04/20/2021 15:30 AG77057 5.53 6263.40 6,257.87 Alpine County Soils pH EC %Sat TKN NO3-N Total P Exch P SO4 CI S2A Celio Ranch 04/15/2021 8.04 7.32 75.2 2810 1.90 1000 5.08 270 2680 SM Bently Ranch 04/15/2021 5.96 0.423 32.7 924 0.768 875 8.97 22 250 S4A Gansberg Ranch 04/15/2021 6.29 1.24 41.5 2490 12.2 561 152 27 375 S5A Gansberg Ranch 04/15/2021 6.03 0457 35.3 1220 9.68 437 7.88 14 450 S6A Neddenriep Ranch 04/15/2021 7.11 0.339 46.5 2360 5.95 623 16.5 5 300 S7A Bruns Ranch 04/15/2021 5.89 0.141 41.1 1560 1.99 871 9.02 6 425 CEC Cu Mo K Ca Mg Na SAR %Na S2A Celio Ranch 04/15/2021 32.7 10.7 0.79 1780 190 272 934 10.2 11.9 SM Bently Ranch 04/15/2021 19.7 12.3 0.51 894 32.4 10.5 44.9 1.75 1.26 S4A Gansberg Ranch 04/15/2021 23.5 11.2 0.77 8690 88.0 19.9 83.3 2.09 1.73 S5A Gansberg Ranch 04/15/2021 17.4 11.8 0.78 3810 27.8 7.03 41.9 1.84 1.38 S6A Neddenriep Ranch 04/15/2021 19.0 10.7 0.88 3600 46.3 5.52 36.0 1.33 <1 SM Bruns Ranch 04/15/2021 16.3 11.7 0.91 2450 55.6 3.49 11.0 0.390 <1 Page 1 of 1 Sample Comments Site Date Time Comments HPR 06/29/2021 11:47 Sampled for BOD only HVC-2 06/29/2021 14:23 No Flow HVC-3 04/27/2021 16:21 No Flow; Standing water HVC-3 05/18/2021 17:03 No Flow. Dry HVC-3 06/29/2021 14:15 Dry HVC-5 04/27/2021 16:23 Dry HVC-5 05/18/2021 17:00 Dry HVC-5 06/29/2021 14:17 Dry SW-12 06/23/2021 10:34 Sampled @ HWY 88 1 SOUTH TAHOE PUBLIC UTILITY DISTRICT Date: C►-1Z EMERGENCY POND MW FIELD MONITORING RECORD Samplers: Purpose: - Preservative Std Check Depth to Well Water Calc Actual Well Casing Depth to Column Water to Water Temp EC Bottom Diameter GW Height Purge Purged a �, 00 z O Site 1D# Time `C H S/cm ft inch ft ft Gallons Gallons rn T z H EC COMMENTS CONTROL lc - .s ,� ��s 80.90 2 �s,47 MW1 .5ti9;�f>' i4�� �. t 1s; 65.80 2 MW02-50 Kati, 1 ,11 _T c'6 -2,4�;, 50.90 2 MW03-50 NG 50.80 2 42,e3 2,7 MW04-50 ���ll :-� i��-1 �. l,�g� c ;S.,s ►�,eS 51.00 2 ��MW07-50 �_�, Z� �hc 52.60 2 ,-75 27,�2 4,7 MW08-25 _ 20.60 2 12, MW11 41.0 2 MW12 31.50 2 14.40 2 Trip Blank T a Groundwater samples shall be collected only after z 1 well volumes Gallons to flush=1 x 7.48 x 3.14 x 0-083 x water column height pH Std Check uses a 7.00 buffer,pH me�mustbehave been flushed and Temperature,pH,and EC measurements Gallons to flush=0.17 x water column height(ft) standardized if result exceeds 7.00±0.05. have stabilized to approximately±5%for each successive Water column height=depth of well-water level uses a 200 pS/cm standard measurement taken in intervals?5 minutes. for 50'well whose water level is 35 feet from ground level: Water column hei ht=50'-35'=15' de D 11 Lfl)Al unnslField Shuels\Field ERB doc Flushing Record Date M'LO 2 Temp E�9%16 Minutes Gallons °C pH Well Time Flushed Flushed ±5% ±5% ± Sampler Comments 1021 2zo 'z S q,5 b'I c QA I `M -in t C I b�I 194, 25 , I 9, 5 1 '7 2 2, Oil 30 f0SF) /0,0 -7,s3 2�}� Jio� ► s 2's a,R 79b ifo8 A 7,v 2-4s MW 2-6S I,S lo,p (0,�2 �,' ��� (0 1131 I �,b /0,0 7,e)I 2`f b mtN 01 147 S I 8,4 V f 3 -7(o st�l t CJ1142 115� jo �f 7,(to 7 7 v 9 I�o m�v o� `'�54 37 `I S,� (o,`�b Ise }nr-t @ I2f7 30� '47 t• 8, ' �, �.3 10- 13I -7,So ISl o o17 of 1bP 132 -71 e2- 7 2-1 14�'� (col Is -z.G� 47,34 Is mw 13 +520 2 2, a rl 15i S50 -7 new ob I�N 1 103 q Igo ►S 2,� �,2 -7.Z5o`i NDta Ts-�7 off must stab!I,jza±i w,fp' Wk�n in inta•"'313>5 n nuta3 J�L3�1=rm;\?ald SnaaGt,Vl�n!!r_bV311_;I�;hin�_Ra��;y you SOUTH TAHOE PUBLIC UTILITY DISTRICT Date: 04 20 21 EMERGENCY POND MW FIELD MONITORING RECORD Samplers: TKbofi�n __ Pu bse: _ _ _ __ _ _ _ Preservative Std G eck Depth to Well Water Calc Actual Well Casing Depth to Column Water to Water �, o Temp EC Bottom Diameter GW Height Purge Purged o O Site 1D# Time C pH PS/cm ft inch ft ft Gallons Gallons cn = i H EC COMMENTS CONTROL 80.90 2 MW1 .5 65.801 2 MW02-50 50.90, 2 MW03-50 50.80, 2 �MW04-50 51.00 2 LW07-50 52.60 2 MW08-25 20.60 2 �MW11 AG770)) 41.0 2 M W 12 AG7705 D 0.J L_S� Q 31.50 2 &.Ct MW13 14.40 2 ,Trip Blank Groundwater samples shall be collected only after z 1 well volumes Gallons to flush=1 x 7.48 x 3.14 x 0.083`x water column height pH Std Check uses a 7.00 buffer,pH meter must he re have been flushed and Temperature,pH,and EC measurements Gallons to flush=0.17 x water column heigh I(ft) standardized if result exceeds buffer, ±met m st Check have stabilized to approximately±5%for each successive Water column height=depth of well-water level uses a 200 d if re standard mc,asurement.taken in intervals>_5 minutes. fur 50'well whose water level is 35 feet from ground level: Water column height=50'-35'=15' Ile. D:\I-Lib\FotijN\FieldSheets\Field ERB doc Flushing Record Date: Temp EC Minutes �LGIns °CpH NS Well Time Flushed ed ±5% ±5% ±5% Sampler Comments �I h l•5 i2,"'1 �� ,L Wig I i3 dr ybra T.3m3 o-1 -,,j3t s[abdiza±5 fo'31JC azsiv=m33311^=_m3nr;13<9l in En Yap ay>;T❑,��; D kL az1=rT;\=iald Shea('>1rNiJOlb,_Wallrlushing_Raz�grd you SOUTH TAHOE PUBLIC UTILITY DISTRICT Date: ),? /-3 zi ACMW FIELD MONITORING RECORD Samplers: f3C2 'eu Purpose: Preservative Std Check Depth to Well Water Calc Actual Depth Casing Column Water to Water to GW Temp EC Bottom Diameter Height Purge Purged 7 Well o, o a Slte iD# Time ft °C H S/cm ft inch ft Gallons Gallons = _ H EC COMMENTS "1 5 CMW-01AW . , li5o a�.cg2 �.3 �.89 -71. 22.6 2 ' 1-u ACMW-01 BE AIG7: ; It3z �,��i � 5 � I I o 23.8 2 ACMW-02N ",i� . 1225 �, �� ;3 �, &H� 12B 34.1 2 ' ACMW-02S �;��� " 1231 .3,�Z 1r. �.2io 125 21.9 2 �2 5s 3,s l l CMW-04W 29.0 2 ACMW-06S Ilo �.o I2.cp 1,2 sgcf 29.9 2 'Trip Blank ' �' Temperature of Control Initial when samples received at Lab Groundwater samples shall be collected only after_1 well volumes Gallons to flush=1 x 7.48 x 3.14 x 0.0832 x water column height pH Std Check uses a 7.00 buffer.pH meter must be re- have been flushed and Temperature,pH,and EC measurements {Gallons to flush=0.17 x water column height(ft) standardized if result exceeds 7.00±0.05.EC Sid Check have stabilized to approximately±5%for each successive 'Water column height=depth of well-water level uses a 200 pS/cm standard measurement taken in intervals?5 minutes. for 50'well whose water level is 35 feet from ground level: Water column height=50'-35'=15' n v nHrn. OCi.1rl nr IAI A— +mnnu Flushing Record Date: Temp - EC Minutes Gallons °C pH PS Well Time Flushed Flushed t s% t 6% t 5% Sam ter Comments ACMIV - OVI,U /0/3 3 12.0 0.,ql /3 lv1B - 12. 1 3-2 /3-J 1023 O-S 13 j' 12 .3 (1. 0 13v •I L my- o(,fs (�j 4�f i 3 w V 1 J 7-' " Sj6" IOq Z �Io , u SAD 5, 0 (^�'L►n�� W o)F�c IIZ� Z l.o g.v U,Uf 112 !/l2 3.5 3.5 4 S3 //0 pGMw- vipW 1115 ! , o -43, C /;M/bU. oW )205 2 1. 0 /3.5 1r.su i Zv l Zr a 4. 0 13.3 0.50 120 1215 ►2 b .D 13.1 !1.5() i33 /rcm w 14 5 ll. -3- 6,33 12- 1 <,;�A f f I z y Nuts:Temp,pk.EC must stabilize t 5%for successive measurements taken in intervals>5 minutes DAL-abWormslField Sheetswonitor_Well_Flushing_Record.doc Group 2 SOUTH TAHOE PUBLIC UTILITY DISTRICT Date: C' ACMW FIELD MONITORING RECORD Samplers: G ruo : .� G`i -k Preservative Std Check Depth to Well Water Calc ActualDepth Well Casing Column Water to Water 10# to GW Temp EC Bottom Diameter Height Purge Purged a �' IH2S0, o ¢O Time ft °C pH PS/cm ft Inch ft ft Gallons �. pH= = pH EC COMMENTS - - - — 1'1 ;�r ACMW-21 ; _ I226 13, b pz i.s ✓ 30'0 2 �On River Ranch Rd.East side of Hwy 88 ��ACMW-22 I ��I ,'..� 12'1(: Z�3.;� 11.�1 t�.ls , a 3 3(. S.3 ✓ ✓ 59.5 2 On Fredericksburg Lane,near S7 �ACMW-23 ����� : ;ICI �$ ,y. l 3y 3�E 3�.(� �-1t 5- ✓ 50.0 2 r✓ (Upstream of SW-15 ACM-24 :AG771 US 5 50.0 2 7 1 Downstream of SW-15 .AG771 '--�! I� �7 ?jlj- 10.} b.'1Z 1S3 Zt-tc�' 3.CG'� 7 'l ACM W-25 30.0 2 Behind Neddenriep's on Weslside Lane; dirt rd between Hwy 88 and Carson River IACMW-26 t1 �d Ii' t3zu $ 5 ��. �.Hc� ,�� � 3. �' r 1 / 30.0 2 On Westside Lane(a7 Stateline ank ig;7 1�'j ��'/2 0.S.e ✓ Trip Bl Temperature of Control when samples received at Lab Gallons to flush=1 x 7.48 x 3.14 x 0.083`x water column height pH Std Check uses a 7.00 buffer.pH meter must be re- Groundwater samples shall be collected only after z 1 well volumes Gallons to flush=0.17 x water column height(ft) standardized if result exceeds 7.00±0.05.EC Std Check (have been flushed and Temperature,pH,and EC measurements Water column height=depth of well-water level uses a 200 uS/cm standard have stabilized to approximately±5%for each successive for 50'well whose water level is 35 feet from ground level: measurement taken in intervals a 5 minutes. Water column height=50'-35'=15' D:\Lab\Forms\Field Sheets\Field ACMW-20_to-26.doc 9/2012017 Flushing Record Date: —r Temp EC Minutes Gallons °C pH PS Well Time Flushed Flushed t 5% t 5% t 5% Sam ler Comments X�r�fj yJ • � � Z �� w.�� c3 ��I gt 10v(A.., • '3 �'y4 3 �.s J3. 137 fly I g SAS ►�, 1 �. 3 ' 3�� i225 �TC.�rrw- - ? Izy/ 2 l> I�, 3 (c��� I C'S 1�3 c �1�►�w - 2 `� I�� i Z 2 io.� �g 152 S71v- P 12s G.ti2 /53 ry�rr� �� 2( 13ZI 2 5ko, e- 31 �I i3L6 >! ° Nota Temp,pH,EC must stabilize t 5%for successive measurements w.-'in Imarllz>5 minutes DALab\Forms\Field Sheels\Monitor_Well_Flushing_Record doc Group 3 SOUTH TAHOE PUBLIC UTILITY DISTRICT Date: 05 zo-m- ACMW FIELD MONITORING RECORD Samplers: Purpose: Preservative Std Check Depth to Well Water Calc Actual Depth Well Casing Column Water to Water to GW Temp EC Bottom Diameter Height Purge Purged T I-i,so, o a Site 1D# Time ft "C H S/cm ft Inch ft Gallons GallonsH= ? o H EC COMMENTS IIACMW-08N �?r` ►-21 �.�I� t� i Ise `' 70.1 2 � �•s� I , �, IACMW-12 ' '' ' � 25-�1 �i,C, I�c ya8 0. I 73.5 2 ll ;o, eq ACMW-13G71:��:7 20.0 2 ACMW-20 Cc14_7 VYI k 'e 21.5 2 GW-11 AOL.� .� �_ pyo u.� fl-II GW-17 Trip Blank 04 `temperature of Control when samples received at Lab Minimum gallons to flush=1 x 7.48 x 3.14 x 0.083 x water column height pH Std Check uses a 7.00 buffer.pH meter must be re Oroundwaler samples shall be collected only after>1 well volumes Gallons to flush =0.17 x water column height(ft) standardized if result exceeds 7.00±0-05.EC Std Check IIFIVa been flushed and 7 emperature, pH,and EC measurements Water column height=depth of well-water level uses a 200 pS/cm standard have stabilized to approximately±5%for each successive for 50'well whose water level is 35 feet from ground level. rneasi irernnnt taken in intervals>_5 minutes. Water column height=50'-35'=15' II V-ah\F-nn ne`d=rld S1 o0!;AF160 AGNM-Group-3-doc 0/20/2017 Flushinro Record Date Temp EC Minutes Gallons °C pH pS IWell Time Flushed Flushed ±5% ±5% 1-596 Sampler Comments gclvlw �L' Oyy2 Z 1 P. 3 q/. 5 1-1� A11M 6 J 1012 2 3, 5 1►. 4..9U /yZ 12 12 / 41, l--�O AC MW IL 16M /1.0 ir51 -� ID II.D G�.�� ►I� ' Note:Temp,pH,EC must stabilize±5%lex successive measurements taken in wlerv3ls 5 minutes Group 4 SOUTH TAHOE PUBLIC UTILITY DISTRICT Date: ACMW FIELD MONITORING RECORD Samplers: Pu ase: c sir Preservative Std Check Depth to Well Water Calc Actual Depth Well Casing Column 'Water to Water to GW Temp EC Bottom Diameter Height Purge Purged o � IH2S0 0 Site I D# Time ft °C H S/cm ft Inch ft Gallons Gallons rn H= _ H EC COMMENTS ACMW-09D 11oG1 il,50 45.1 2 15 �� y 33 / ✓ ACMW-10 ;:� ,z�3 u tt )Z rl cosy 1'-1Z 38.5 2 ���� 2 hL 3 ! ( � ✓ _ 5,�� up cl ti�bc•� \ J ACMW-11 C�,S,'d 1)ao ; ,60 '� �:SG � "� 33.5 2 �o,�� :;,�$ ✓ J r� �� ACMW-14 ; '- : ib55 i� �'� )i lv 3� 30.0 2 2.59 2w ut GW-08 ', �' J '✓ Trip Blank Temperature of Control Initial 'when samples received Lat Lab Minimum gallons to flush=1 x 7.48 x 3 14 x 0.0832 x water column height pH Std Check uses a 7.00 buffer.pH meter must be re- Groundwater samples shall be collected only after>_1 well volumes Gallons to flush=0.17 x water column height(ft) standardized if result exceeds 7.00 t 0.05.EC Std Check have been flushed and Temperature,pH,and EC measurements 'Water column height=depth of well-water level uses a 200 pS/cm standard have stabilized to approximately t 5%for each successive For 50'well whose water level is 35 feet from ground level: measurement taken in intervals>_5 minutes. Water column height=50'-35'=15' DALab\Forms\Field Sheets\Field ACMW-Group_4 doc 1/2212016 Flushing Record Date: OU-0.3,Zj Temp EC Minutes Gallons °C pH PS Well Time Flushed Flushed t 5% *5% t 5% Sampler Comments 14 t9Gntw -/� L s 11r;� ro.U'1 73.b d 5'�--r @ IOy 3 t Q ItS l,5 f'3 '2, 4 ►� vt C� 1225 Note:Temp.pH;EC must stabilize t 5%for successive measurements taken in intervals>5 minutes D:\Lab\Forms\Field Sheets\Monitor_Well_Flushing_Record doc Group 5 SOUTH TAHOE PUBLIC UTILITY DISTRICT Date: r,& ACMW FIELD MONITORING RECORD Samplers:-;,5- Pur ose: Preservative Std Check Depth to Well Water Calc Actual Depth Well Casing Column Water to Water to GW Temp EC Bottom Diameter Height Purge Purged o A HzSO, z o¢ Site lD# Time ft °C H S/cm ft Inch ft Gallons Gallons y co H= = TpHEC COMMENTS I I ACMW-15 iz,2 �. 3`I �.h r 1 / ✓ f 29.5 2 �.ACMW-l6 �r. �_ q .ACMW-17 �` ' i2�0 �-`18 � c� ��� �;_� � r 30.0 2 / J ✓ ✓ ACMW-18 , ;;ZD ., % � lz 3 c�uo = z 28.0 2 36�> ;.0 n .ACMW-193�:� �'. ;3 ri.� �, 2. w �� �,�� �,�C�-�.sI 20.0 2 �Z � 'Trip Blank ''`Ti`� -�a3 'Temperature of Control —` '"'°a' when samples received at Lab Minimum gallons to flush=1 x 7.48 x 3.14 x 0.0832 x water column height pH Std Check uses a 7.00 buffer.pH meter must be re- Groundwater samples shall be collected only after>_1 well volumes Gallons to flush=0.17 x water column height(ft) standardized if result exceeds 7.00 t 0.05.EC Std Check have been flushed and Temperature,pH,and EC measurements Water column height=depth of well-water level uses a 200 pS/cm standard have stabilized to approximately t 5%for each successive for 50'well whose water level is 35 feet from ground level: measurement taken in intervals 2:5 minutes. Water column height=50'-35'=15' D:\Lab\Forms\Field Sheets\Field ACMW-Group_5 doc 1=016 Flushing Record Date: Temp EC Minutes Gallons °C pH PS Well Time Flushed Flushed *5% t 5% t 5% Sampler Comments iv�5 11�1� L 2.S tt.�3 ilk '�icU S�Git � ii.3 . /2.`7 U. ;Z ►2. 2 �.3� �3 `� /9(✓MW '1 iZ3s Z / S !1. 3 �•S� �U,lp !LKD 120 iZ 13 !o.} (off riy0 j; 15.5 i0, u. 8�f 77J In 3 �5- �ICMtu-/Gj Z 2 . 5 12-::�, ZOS 135E 3 fj' // G 26 v 20q ,xeiC� o roe Ynn�e �N 7-cc nN uSe d Note.Temp,pH,EC must stahllite t 5%ror suCDBsslve measurements taken in Intervals>5 minutes. D:\Lab\Forms\Field Sheets\Monitor_Well_Flushing_Record doc