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HomeMy WebLinkAbout2019 Annual Report 8v . 1950 . water 5outh Tahoe Fublic Utility District 1275 Meadow Creot Drive•South Lake Tahoe•CA 96150-7401 Phone 530 544-6474•Fax 530 541-0614•www.5tpud.u5 April 10, 2019 Patty Kouyoumdjian California Regional Water Quality Control Board - Lahontan Region 2501 Lake Tahoe Boulevard South Lake Tahoe, CA 96150 Subject: 2019 Annual Report Ms. Kouyoumdjian: Enclosed is the South Tahoe Public Utility District's annual self-monitoring report for the 2019 calendar year. The District is reporting as required by the Wastewater Reclamation Permit (Board Order R6T-2004-0010A3, WDID No. 6A095900700). This report contains our compliance record, sewer connection information and sewer flows, as well as graphical and tabular presentation of the data collected during 2019. Trend analyses on sample sites from pre-discharge to 2019 are included. Also included is our pretreatment program update. Please give me a call if you have any questions regarding this report. Respeetfjlly yours, Dan Arce Laboratory Director CC: Lahontan RWQCB - RB6-Lahontan(a�waterboards.ca.gov Lahontan RWQCB, Robert Tucker- RTucker(a)waterboards.ca.gov Alpine County Board of Supervisors -ttremayne(a.alpinecountyca.gov Alpine County Health Department, Dr. Richard Johnson - riohnson(a_)alpinecountyca.gov Alpine County Health Department, Dennis Lampson dlampson(o-),alpinecountyca.gov Alpine County STPUD Contract Commission — Dr. Richard Harvey rharveyl23(aDg mail.com MAnnualReportslahonlan Cover Letter-2019.doc WATER RECLAMATION PLANT ALPINE COUNTY 2019 ANNUAL REPORT SoUTH TgH�F pU sewer • 1950 • Ydae G< e4/C UTILITY D1S'P` SOUTH TAHOE PUBLIC UTILITY DISTRICT 2019 ANNUAL PERFORMANCE DATA Table of Contents Wastewater Treatment Plant Pretreatment Program Heavenly Valley Creek Emergency Retention Basin, Treatment Plant & Buried Sludge monitoring Wells Harvey Place Reservoir Indian Creek Reservoir Alpine County Monitoring Soils Alpine County Monitoring Wells Diamond Valley Ranch Monitoring Wells Alpine County Potable Water Wells Alpine County Surface Waters Irrigation Ditches Trihalomethanes (THM) & MTBE Monitoring Test Method for Total Nitrogen & TKN WASTEWATER TREATMENT PLANT WASTEWATER TREATMENT The plant influent flow and loadings and the effluent quality are reported in this section. Tables and graphs are provided to show 2019 monthly results and yearly averages since 1980. There are multiple tables showing similar information. The averages computed in these tables may be different from one another due to the data averaged. Some tables compute the annual average from the monthly averages, while others compute the annual average from the entire data set. 2019 Annual Report 1. Compliance Record: No violations occurred during 2019 2. Wastewater Treatment Flow Information: Permits Item Flow # a. Annualpeak-day dry-weather influent flow (mgd) 4.97 b Annual peak-day wet-weather influent flow and associated storm data (mgd) 7.01 c. Maximum month influent flow (mgd) 4.46 d. Annual average influent flow (mgd) 3.66 1. Sewer connection permits issued but not currently used, 26,700 30 (gpd) e. 2. Capacity currently issued/reserved for public agencies 257,500 191 (gpd) 3. Projects issued "will-serve" letters or similar commitment 0 0 f. Estimated influent flow from facilities described in 2e. 284,200 Estimated remaining available wastewater treatment capacity 32% g' considerin 4 the influent flow estimated in 2f. See note Estimated influent flow parameters listed in 2a through 2d for the coming year • Annual peak-day dry-weather influent flow (mgd) 4.95 h. Annual peak-day wet-weather influent flow and 9.55 associated storm data (mgd) • Maximum month influent flow (mgd) 5.09 • Annual average influent flow (mgd) 3.52 Notes: Estimated remaining available wastewater treatment capacity is computed by subtracting annual peak-day dry-weather influent flow(2a)plus total flow from permits issued but not used(2f)from wastewater treatment plant design capacity 7.7 mgd and dividing by 7.7 mgd. Annual peak-day dry-weather influent flow,Annual peak-day wet-weather influent flow,and Annual average influent flow for 2020 estimated from linear regression analysis using corresponding flows from the last ten years(2010 through 2019). D:tAn nualReports\Secti on_C_Data-2019.doc WASTEWATER FLOWS 2019 Influent Effluent Month Total Max Min Ave Total Max Min Ave Jan 106.44 4.66 2.82 3.43 115.48 5.21 3.01 3.73 Feb 115.56 7.01 3.07 4.13 126.50 8.37 3.34 4.52 Mar 134.98 5.09 3.77 4.35 147.19 5.99 4.08 4.75 Arp 133.82 5.26 3.74 4.46 146.40 6.10 0.14 4.88 May 113.46 4.43 3.40 3.66 122.32 4.70 3.56 3.95 June 115.49 4.25 3.57 3.85 121.98 4.67 3.63 4.07 July 125.63 4.97 3.65 4.05 134.66 5.43 3.62 4.34 Aug 111.65 4.28 3.03 3.60 121.88 4.53 3.26 3.93 Sep 93.23 4.25 2.71 3.11 102.15 4.65 2.95 3.41 Oct 85.67 3.10 2.52 2.76 93.19 3.47 2.65 3.01 Nov 80.18 4.84 2.66 3.24 85.13 4.65 0.00 2.84 Dec 102.64 4.27 2.68 3.31 112.83 4.88 2.76 3.64 Total 1,318.75 1,429.71 Maximum 134.98 7.01 4.46 147.19 8.37 4.88 Minimum 80.18 2.52 2.76 85.13 0.00 2.84 Average 109.90 3.66 119.14 3.92 Note: Total flows in MG; Max, Min and Ave flows in MGD. Maximum Flow Report 2019 Wet Weather Maximum Influent Flow: 02/14/2019 7.01 MG Dry Weather Maximum Influent Flow: 07/05/2019 4.97 MG . Influent Precipitation Date Day MG Inch Type Comments Wet Weather 02/14/2019 Thu 7.01 1.54 Snow Maximum Wet Weather Flow 02/13/2019 Wed 6.10 2.24 Rain 02/15/2019 Fri 5.48 0.58 Snow 02/16/2019 Sat 5.36 04/02/2019 Tue 5.26 0.65 Rain 02/17/2019 Sun 5.16 03/03/2019 Sun 5.09 0.24 Snow 04/08/2019 Mon 4.92 0.32 Rain 03/02/2019 Sat 4.90 0.38 Rain 04/07/2019 Sun 4.82 Dry Weather 07/05/2019 Fri 4.97 Maximum Dry Weather Flow 07/04/2019 Thu 4.80 07/06/2019 Sat 4.79 05/26/2019 Sun 4.43 0.34 Snow 07/27/2019 Sat 4.36 07/20/2019 Sat 4.31 ,07/13/2019 Sat 4.30 08/03/2019 Sat 4.28 06/15/2019 Sat 4.25 07/03/2019 Wed 4.25 D:\AnnualReports\Max—Flow—Annual—Report-2019 PLANT LOADINGS for 2019 Change 2018 2019 % Influent Flow, MG 1,294.44 1,335.87 3.20 COD (mg/1) COD (Ibs/yr) BOD (mg/1) 246 243 -1.29 BOD (Ibs/yr) 2,654,825 2,705,444 1.91 SS (mg/1) 200 192 -4.04 SS (Ibs/yr) 2,154,628 2,138,173 -0.76 NH3-N (mg/1) 27.9 28.6 2.31 NH3-N (Ibs/yr) 301,558 318,359 5.57 Total P (mg/1) 5.02 5.19 3.34 Total P (Ibs/yr) 54,212 57,795 6.61 RAW INFLUENT CHARACTERISTICS for 2019 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Yearly COD Max: Min: Ave: BOD Max: 298 247 225 195 239 269 315 294 283 334 354 374 374 Min: 198 144 154 143 177 204 266 210 244 244 246 233 143 Ave: 243 203 194 171 211 239 283 263 269 270 282 286 243 SS Max: 235 202 178 175 236 252 274 253 238 270 252 245 274 Min: 163 113 124 106 140 178 171 194 181 159 174 156 106 Ave: 193 170 150 136 178 209 240 224 212 205 204 182 192 NH3-N Max: 33.7 27.8 22.8 22.3 27.9 34.7 39.8 37.9 32.5 31.3 31.7 36.2 39.8 Min: 25.7 23.8 18.3 17.2 23.1 28.0 34.7 29.3 30.1 28.6 28.8 22.1 17.2 Ave: 29.5 25.7 21.5 19.7 24.8 30.9 36.8 32.5 31.6 30.2 30.0 29.7 28.6 Total P Max: 5.68 5.04 3.66 4.89 4.21 5.41 6.44 6.24 5.84 5.80 8.50 5.42 8.50 Min: 4.57 5.04 3.62 3.62 4.21 4.73 5.48 4.83 5.84 5.39 5.40 5.00 3.62 Ave: 5.27 5.04 3.64 4.15 4.21 5.07 6.02 5.54 5.84 5.60 6.72 5.15 5.19 Note: Results expressed as mg/I RAW INFLUENT ANNUAL TRENDS <---FLOW---> Total Daily COD BOD SS NH3-N NO3-N Total-P CI TDS Year MG MGD mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 1980 1,585.3 4.30 368 170 139 22.6 0.056 8.30 29.9 246 1981 1,467.4 4.00 397 161 148 22.8 0.053 8.37 27.6 245 1982 1,685.1 4.60 369 157 129 20.4 0.092 7.17 28.0 230 1983 1,612.9 4.42 344 153 126 18.4 0.096 6.71 28.2 231 1984 1,493.0 4.08 406 161 135 21.0 0.076 7.45 29.0 231 1985 1,464.8 4.01 412 177 143 21.3 0.069 7.82 30.8 245 1986 1,573.4 4.32 353 148 117 19.1 0.101 6.73 29.4 237 1987 1,551.2 4.25 388 165 132 21.0 1.497 6.99 31.1 252 1988 1,501.4 4.10 407 197 134 23.2 0.040 7.34 35.5 257 1989 1,652.3 4.52 430 174 134 20.8 0.135 6.80 38.0 243 1990 1,573.6 4.31 534 212 185 21.9 0.072 7.13 34.7 268 1991 1,401.1 3.83 418 182 158 21.1 0.219 7.00 39.5 260 1992 1,438.3 3.93 428 193 162 21.2 0.165 6.93 37.3 265 1993 1,587.9 4.35 420 203 149 20.1 0.069 5.50 35.3 261 1994 1,464.6 4.01 434 205 172 19.9 0.065 5.76 39.2 265 1995 1,694.8 4.64 406 169 144 18.9 0.268 5.13 35.5 251 1996 1,787.4 4.88 381 169 139 17.4 0.202 4.65 34.5 233 1997 1,766.1 4.84 389 162 144 18.2 0.144 4.67 34.9 238 1998 1,719.1 4.71 404 175 157 18.0 0.226 4.67 36.1 236 1999 1,774.2 4.86 397 173 154 18.6 0.410 4.63 35.8 237 2000 1,774.3 4.85 400 171 152 19.2 0.447 4.95 39.4 249 2001 1,586.0 4.34 440 191 174 19.5 0.786 5.40 42.1 263 2002 1,659.5 4.55 406 176 151 18.4 0.451 4.84 40.6 256 2003 1,552.9 4.25 426 187 156 20.2 0.266 5.32 41.6 256 2004 1,563.5 4.27 478 207 196 21.9 0.210 5.28 37.8 261 2005 1,602.1 4.39 434 192 164 20.4 0.132 4.82 35.8 251 2006 1,682.2 4.61 405 183 156 20.4 0.043 4.97 35.6 233 2007 1,471.3 4.03 463 200 170 21.6 0.169 5.24 34.6 250 2008 1,454.3 3.97 489 206 165 23.4 0.072 5.47 38.6 253 2009 1,416.0 3.88 492 220 176 23.8 0.028 5.44 37.7 250 2010 1,424.2 3.90 478 211 178 22.2 0.130 5.19 39.7 248 2011 1,526.8 4.18 395 188 168 19.8 0.350 4.28 37.9 240 2012 1,333.3 3.64 200 166 23.6 0.061 4.62 38.3 246 2013 1,275.0 3.49 230 194 25.1 0.053 5.14 36.5 247 2014 1,191.3 3.26 244 211 25.9 0.031 5.47 38.4 254 2015 1,110.9 3.04 265 215 28.1 0.027 5.65 40.7 267 2016 1,279.3 3.49 227 193 26.3 0.061 5.36 40.9 252 2017 1,600.7 4.40 207 171 21.4 0.102 4.32 45.3 250 2018 1,294.4 3.52 247 199 27.9 0.036 4.97 44.6 256 2019 1,318.8 3.61 242 192 28.6 0.075 5.36 45.5 267 Maximum 1,787.4 4.88 534 265 215 28.6 1.497 8.37 45.5 268 Minimum 1,110.9 3.04 344 148 117 17.4 0.027 4.28 27.6 230 Average 1,522.8 4.17 418 193 161 21.6 0.190 5.80 36.5 250 #Years 40 40 32 40 40 40 40 40 40 40 RAW INFLUENT Influent Flows Raw Influent Annual Trends Annual Trends 8 2,400 600 7 - 2,100 500 6 1,800 0 5 1,500 400 2 4 1,200 0 300 at E Q' 3 900 200 Jlb- 2 600 1 300 100 0 0 0 t Daily Ave MGD Yearly Total MG t COD t BOD t SS Ammonia-Nitrogen Total Phosphorus Annual Trends Annual Trends 35 10 30 9 8 25 7 J 20 J 6 a a 5 E 15 - E 4 10 3 2 5 -- 1 0 0 RAW INFLUENT Chlorides &TDS Chemical Oxygen Demand (COD) Annual Trends Annual Trends 100 400 800 — 90 360 700 - 80 320 70 280 600 E 60 �� - ���•�• • ✓• 240 J 500 - - - o e 0 50 200 E J = o rn 400 t 40 160 ~ E U 30 120 300 20 ao 200 10 40 100 0 0 0 L - -dr—Chlorides t TDS Linear(Chlorides) Linear(TDS) Biochemical Oxygen Demand (BOD) Suspended Solids (SS) Annual Trends Annual Trends 400 300 -- 350 250 300 - 200 - 250 o, 200 150 - -- E E 150 100 - - 100 50 50 - - 0 0 BIOCHEMICAL OXYGEN DEMAND UNIT PROCESS PERFORMANCE 2019 Removal Month Raw Primary Sec Final % January 243 169 17.8 5.93 98 February 203 126 17.7 9.03 96 March 194 128 15.5 8.21 96 April 171 108 7.8 4.01 98 May 211 127 12.2 7.38 97 June 239 139 16.5 6.40 97 July 283 246 40.7 9.37 97 August 263 219 33.6 8.60 97 September 269 190 22.7 8.17 97 October 242 180 49.7 5.76 98 November 282 166 30.0 9.54 97 December 286 176 19.7 9.22 97 12 Month Ave 241 165 23.7 7.64 97 % Removal 32 86 68 97 Biochemical Oxygen Demand Percent Removal 100 90 y 80 0 E m 70 0 60 50 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Final Effluent -Linear(Final Effluent) SUSPENDED SOLIDS UNIT PROCESS PERFORMANCE 2019 Removal Month Raw Primary Sec Final % January 193 107.4 12.0 2.78 99 February 170 91.8 12.8 4.29 97 March 150 98.0 11.0 3.52 98 April 136 99.5 5.8 1.60 99 May 178 71.1 7.4 2.98 98 June 209 64.5 9.3 1.90 99 July 240 93.4 9.4 2.85 99 August 224 104.3 11.1 3.32 99 September 212 111.3 13.6 3.09 99 October 206 97.3 12.0 2.65 99 November 204 66.5 16.9 2.73 99 December 182 94.8 14.1 3.40 98 12 Month Ave 192 91.7 11.3 2.93 99 % Removal 52 88, 74 98 Suspended Solids Percent Removal 100 90 80 0 E m IY 70 0 60 50 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec -�Final Effluent Linear(Final Effluent) FINAL EFFLUENT ANNUALTRENDS <-FLOW-> Total Total Daily COD BOD SS NH3-N NO3-N TKN Total-P CI TDS Turbidity CIZ Coliforms Year MG MGD mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L NTU mg/L Total Fecal r E..or pH 80 1,418.20 4.32 22.0 3.0 2.0 5.5 5.75 0.40 148 551 0.7 2.8 7.38 81 1,354.60 3.90 20.0 2.0 2.0 3.3 13.47 0.83 80 455 0.9 0.7 7.74 82 1,807.90 5.10 23.0 4.0 4.0 3.1 7.87 0.81 88 410 1.8 2.6 7.65 83 1,737.60 4.85 18.0 2.0 2.0 1.0 8.50 0.72 94 426 1.0 1.8 7.86 84 1,566.70 4.33 16.0 2.0 1.0 1.6 8.24 0.39 103 436 0.7 1.8 7.65 85 1,532.40 4.24 20.0 2.0 3.0 4.5 5.15 0.17 92 395 1.1 4.9 7.59 86 1,660.50 4.59 17.0 2.0 2.0 5.3 4.95 0.20 82 341 1.0 4.9 7.12 87 1,657.20 4.81 19.0 2.0 4.0 7.7 4.83 0.23 117 452 1.4 3.9 7.25 88 1,619.90 4.42 14.0 2.0 3.0 6.6 9.29 0.12 136 480 1.0 2.8 7.21 89 1,769.70 4.89 40.0 6.0 5.0 13.9 4.93 15.6 3.80 76 326 2.5 13.6 2.9 2.0 7.10 90 1,697.30 4.76 37.0 6.0 4.0 8.4 8.39 10.1 3.80 83 387 2.3 14.6 2.0 2.0 7.30 91 1,610.80 4.46 37.0 6.0 4.0 5.9 9.71 7.8 3.55 92 367 2.6 10.3 2.0 2.0 7.35 92 1,608.40 4.39 41.0 7.0 4.0 9.6 6.46 11.2 5.05 64 289 3.1 4.4 3.7 2.1 7.32 93 1,795.00 4.94 51.0 8.0 4.0 13.8 7.03 15.6 3.79 60 266 3.1 5.3 2.1 2.0 7.32 94 1,638.20 4.50 43.1 7.6 3.8 20.6 1.30 . 22.1 3.21 59 253 2.9 4.1 3.3 2.0 7.41 95 1,925.70 5.27 39.4 7.4 5.0 20.5 0.03 21.1 2.69 51 236 2.6 4.4 2.2 2.0 7.46 96 1.965.80 5.37 37.3 7.0 4.4 18.6 0.13 20.6 2.50 44 221 2.5 4.0 2.1 2.0 7.64 97 1,872.30 5.12 37.0 6.9 3.7 19.3 0.25 20.7 2.59 50 226 2.8 6.1 2.1 2.0 7.62 98 1,693.40 4.64 35.6 6.9 4.0 18.6 0.28 21.1 2.56 48 227 2.6 4.6 2.1 2.0 7.53 99 1,742.20 4.78 34.8 6.5 3.1 19.3 0.16 19.8 2.65 49 220 2.4 4.2 2.8 2.0 7.49 00 1,685.90 4.74 42.4 7.9 3.9 20.7 0.04 20.9 2.55 53 226 2.8 4.5 2.1 2.0 7.49 01 1,565.40 4.29 46.9 8.7 5.1 19.1 0.54 21.6 2.87 58 241 4.5 5.2 2.0 2.0 7.43 02 1,581.80 4.33 41.2 6.8 3.0 19.8 0.64 21.6 2.79 55 231 3.7 5.5 2.0 2.0 7.44 03 1,537.50 4.21 45.9 7.8 3.3 22.2 0.10 24.2 2.83 57 240 4.1 5.7 2.1 2.0 7.54 04 1,483.30 4.05 47.4 7.9 3.8 23.1 0.04 26.3 3.19 56 242 4.8 6.0 2.1 2.0 7.47 05 1,496.68 4.21 44.9 7.4 3.5 21.1 0.74 21.7 3.06 51 250 4.3 6.2 2.0 2.0 7.69 06 1,588.08 4.35 47.8 6.6 2.7 21.2 0.07 21.7 3.09 48 242 4.4 6.0 2.0 2.0 7.69 07 1,380.03 3.78 47.5 7.5 3.3 22.2 0.44 24.5 3.38 50 255 4.4 6.5 2.0 2.0 7.70 08 1.343.14 3.67 40.5 6.0 2.9 20.2 1.60 21.5 3.61 54 255 4.1 5.3 2.0 2.0 7.64 09 1,455.20 3.98 45.7 8.6 3.1 21.9 1.02 22.8 3.66 50 250 4.5 6.1 2.2 1.9 7.61 10 1,500.48 4.11 44.6 5.5 3.0 22.3 0.88 25.0 3.38 50 246 3.5 6.3 1.9 1.8 7.70 11 1,616.50 4.43 40.6 6.7 3.7 21.5 0.47 30.3 2.75 46 238 3.3 5.5 1.9 1.8 7.71 12 1,445.96 3.95 9.0 2.7 22.4 0.79 26.1 2.88 49 242 3.4 5.4 6.4 6.2 7.71 13 1,409.31 3.86 6.5 2.7 24.4 0.53 27.8 3.13 49 250 3.6 6.4 2.0 1.8 7.70 14 1,329.45 3.65 7.9 2.2 25.8 0.57 29.1 3.32 52 253 3.4 5.6 2.1 1.8 7.65 15 1,247.60 3.42 6.3 2.7 25.2 1.34 28.5 3.63 52 263 4.0 6.1 254.2 48.4 7.47 16 1,410.41 3.85 7.4 3.9 23.9 0.92 28.2 3.34 58 269 3.9 9.3 2.1 1.5 7.79 17 1,754.26 4.82 7.5 3.6 23.0 0.12 26.5 2.78 53 245 3.5 6.4 1.0 1.0 7.74 18 1,405.73 3.85 10.0 4.9 28.3 0.21 31.1 3.38 57 268 4.3 7.3 1.1 1.0 7.84 19 1,429.71 3.92 7.8 2.9 27.2 0.38 28.8 3.44 57 266 3.6 7.0 1.1 1.0 7.83 Permit Max 300 45 60 20 240' Permit Ave 60 30 30 10 232 Maximum 1,965.80 5.37 51.0 10.0 5.1 28.3 13.47 31.1 5.05 148 551 4.8 14.6 254.2 48.4 7.86 Minimum 1,247.60 3.42 14.0 2.0 1.0 1.0 0.03 7.8 0.12 44 220 0.7 0.7 1.0 1.0 7.10 Average 1,583.51 4.38 35.6 6.2 3.4 16.6 2.95 22.4 2.58 67 298 2.9 5.6 10.4 3.5 7.55 #Years 40 40 32 40 40 40 40 31 40 40 40 40 40 31 31 40 FINAL EFFLUENT Effluent Flows Chemical Oxygen Demand Annual Trends Annual Trends 10 3,000 50 9 2,700 8 2,400 48 7 2,100 46 0 6 1,800 5 1,500 J 44 a 4 1,200 3 900 42 2 600 40 1 300 0 0 38 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 36 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 —�Daily Ave MGD t Yearly Total MG Biochemical Oxygen Demand Suspended Solids Annual Trends Annual Trends 30.0 30.0 25.0 25.0 20.0 20.0 J J 15.0 E 15.0 10.0 10.0 5.0 5.0 0.0 0.0 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 10 FINAL EFFLUENT Ammonia-Nitrogen Total Phosphorus Annual Trends Annual Trends 30 10 9 25 8 20 #1 7 6 J E 15 E 5 4 10 3 5 2 1 0 0 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 Nitate-Nitrogen Chlorides &TDS Annual Trends Annual Trends 20 350 700 300 600 15 250 500 J o! E 200 400 0 J v E r/i 1 150 300 E U 100 200 5 50 100 0 0 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 0 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 t Chlorides —0 TDS FINAL EFFLUENT Turbidity Total Chlorine Annual Trends Annual Trends 20 20 15 15 10 01 10 z E 5 5 0 0 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 pH Annual Trends 11 10 9 8 x a 7 6 5 4 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 Annual Metals Report Raw Influent Ca Mg K Na Al As Ba Be Ag Cd Cr Cu mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 01/21/2010 17.1 4.11 10.6 41.7 450 2.01 <2 <10 <2 2 28.2 04/08/2010 19 4.3 9.7 39 500 1.8 34 <1 <0.5 <0.5 2.5 30 07/26/2010 21 4.3 12 43 510 2.7 24 <1 <0.5 <0.5 1.6 43 10/11/2010 22 4.3 11 42 810 2.7 30 <1 <0.5 <0.5 1.8 80 11/22/2010 19 3.9 11 38 470 2 26 <2 <2 <2 3 40 04/06/2011 19.8 4.24 8.29 34.1 310 <2 43 <2 <10 <2 <2 21.7 07/07/2011 22.7 4.66 11.2 41.5 633 2.41 39.1 <1 0.744 <0.5 1.53 65 11/13/2012 21 4.3 11 36 310 2 31 <2 <2 <2 2 34 11/25/2013 20 4.1 12 40 300 3 23 <2 <2 <2 2 31 11/11/2014 18 4.0 12 42 300 3 40 <2 <2 <2 2 37 11/10/2015 19 4.6 12 43 260 2 30 <2 <2 <2 <2 35 11/01/2016 19 4 10 37 300 <4 30 <4 <4 <4 <4 29 08/15/2017 21 2 6 43 200 <4 30 <4 <4 <4 <4 48 11/28/2018 20 4 12 39 200 4 20 <4 <4 <4 4 31 12/03/2019 21 5 11 43 300 <5 34 <5 <5 <5 <5 36 Fe Hg Mn Mo Ni Pb Se Sb TI V Zn ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 01/21/2010 540 <0.2 43 14 3 <2 <10 <2 <1 <2 100 04/08/2010 700 <0.2 49 11 <5 1.2 <5 <1 <1 5.3 97 07/26/2010 800 <0.2 37 13 <5 1.2 <5 <1 <1 3.3 110 10/11/2010 1000 <0.2 44 16 <5 1.6 <5 <1 <1 3.3 130 11/22/2010 680 0.5 48 22 3 <2 <10 <2 <1 2 110 04/06/2011 716 <0.2 37.9 8 <2 <2.5 <10 <2 <1 <2 82.7 07/07/2011 1270 <0.2 57 13.6 <5 1.97 <5 <1 <1 4.04 150 11/13/2012 760 <0.2 50 11 3 <2 <10 <2 <1 3 120 11/25/2013 600 <0.1 42 12 2 <2 <10 <2 <4 2 110 11/11/2014 630 <0.1 45 17 3 <2 <10 <2 <1 3 140 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l/Sw l/2w l/Ow l/Bw nJ a:) Pj Od a8 e8 Sd Id EN N gym e:) juenlJ13 leui3 laodaU sle}aw lenuud South Tahoe PUD Biosolids Cake Metals Results reported as dry weight Solids As Be Cd Cr Cu Pb Hg Mo Ni Se Ag Zn Site Date ID# % mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg Cake 02/03/14 AG39474 29.0% 2 < 1 < 1 6 114 4 0.55 7 4 < 7 < 1 317 Cake 05/12/14 AG40792 27.0% 2 < 1 < 1 7 122 4 0.41 5 5 < 7 < 1 315 Cake 08/13/14 AG42401 28.0% 3 < 1 1 7 154 8 0.29 9 4 < 7 1 429 Cake 11/11/14 AG43808 28.0% 3 < 1 1 7 125 4 0.29 7 5 < 7 < 1 346 Cake 02/23/15 AG45177 46.0% 2 < 1 < 1 5 117 3 0.33 6 4 < 5 < 1 326 Cake 05/19/15 AG46276 36.0% 4 < 1 < 1 7 156 5 0.56 7 4 < 6 < 1 431 Cake 08/03/15 AG47322 45.0% 2 < 1 < 1 4 127 4 0.24 6 3 < 7 < 1 400 Cake 11/10/15 AG48725 28.0% 3 < 1 < 1 3 114 4 0.29 6 4 < 5 < 1 329 Cake 02/02/16 AG49699 28.0% 4 < 1 < 1 7 129 4 0.21 6 5 < 5 1 318 Cake 05/03/16 AG50811 33.0% 3 < 1 < 1 7 88 4 0.18 5 4 < 6 < 1 276 Cake 08/08/16 AG52307 28.0% 3 < 1 < 1 6 125 4 0.18 6 4 < 5 < 1 464 Cake 11/01/16 AG53555 26.0% 4 < 1 < 1 8 123 4 < 0.03 8 4 < 6 < 1 385 Cake 02/13/17 AG54852 25.0% -3 < 1 < 1 8 112 7 0.16 5 6 < 5 6 280 Cake 05/22/17 AG56207 15.0% 3 < 1 < 1 6 107 6 0.33 6 5 < 5 < 1 293 Cake 08/15/17 AG57585 26.0% 3 < 1 < 1 6 138 3 0.23 7 5 < 5 < 1 538 Cake 11/14/17 AG58968 28.0% 5 < 0.5 1 6 293 5 0.36 10 5 2 2 1000 Cake 02/21/18 AG60195 25.0% 2 < 1 < 1 6 112 3 0.17 6 4 < 5 < 1 312 Cake 06/13/18 AG61825 27.0% 3 < 1 < 1 5 170 3 0.20 10 3 < 5 1 444 Cake 09/19/18 AG63367 28.0% 4 < 1 2 8 189 4 0.25 12 5 < 5 2 500 Cake 11/28/18 AG64325 34.0% 4 < 1 1 9 141 4 0.24 11 5 < 5 1 353 Cake 02/13/19 AG65309 29.0% 2 < 1 < 1 9 110 3 0.62 6 6 < 5 < 1 279 Cake 06/19/19 AG67222 28.0% 3 < 1 < 1 7 193 11 0.18 7 7 < 5 < 1 464 Cake 09/18/19 AG68788 25.0% 5 < 1 1 10 192 5 0.24 11 6 < 5 1 608 Cake 12/03/19 AG69847 34.0% 3 < 1 1 7 109 4 0.29 6 4 < 5 < 1 294 Maximum 46.0% 5 4 4 19 307 29 2.50 19 19 9 19 1000 Minimum 15.0% 2 0 1 1 88 3 0.03 3 3 2 1 276 Average 28.0% 3 1 1 7 174 7 0.50 8 5 6 2 408 #Tests 64 64 64 64 64 64 64 64 64 64 64 64 64 Percent As Be Cd Cr Cu Pb Hg Mo Ni Se Ag Zn >0 >0 >0 >0 >0 >0 >0 >0 >0 >0 >0 >0 >0 South Tahoe PUD Biosolids Cake Metals Results reported as wet weight Solids As Be Cd Cr Cu Pb Hg Mo Ni Se Ag Zn Site Date ID# % mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg Cake 02/03/14 AG39474 29.0% 0.7 < 0.3 < 0.3 1.8 33 1.1 0.16 1.9 1.3 < 2.0 < 0.3 92 Cake 05/12/14 AG40792 27.0% 0.6 < 0.3 < 0.3 1.8 33 1.0 0.11 1.3 1.4 < 2.0 < 0.3 85 Cake 08/13/14 AG42401 28.0% 0.9 < 0.3 0.3 1.9 43 2.1 0.08 2.5 1.2 < 2.0 0.4 120 Cake 11/11/14 AG43808 28.0% 0.9 < 0.3 0.4 1.9 35 1.2 _ 0.08 2.0 1.3 < 2.0 < 0.3 97 Cake 02/23/15 AG45177 46.0% 1.0 < 0.5 < 0.5 2.5 54 1.5 0.15 2.6 1.7 < 2.5 < 0.5 150 Cake 05/19/15 AG46276 36.0% 1.4 < 0.4 < 0.4 2.4 56 1.9 0.20 2.4 1.6 < 2.0 < 0.4 155 Cake 08/03/15 AG47322 45.0% 1.1 < 0.5 < 0.5 1.7 57 1.7 0.11 2.6 1.4 < 3.0 < 0.5 180 Cake 11/10/15 AG48725 28.0% 0.9 < 0.3 < 0.3 0.9 32 1.0 0.08 1.6 1.0 < 1.5 < 0.3 92 Cake 02/02/16 AG49699 28.0% 1.0 < 0.3 < 0.3 2.0 36 1.0 0.06 1.8 1.3 < 1.5 0.3 89 Cake 05/03/16 AG50811 33.0% 1.0 < 0.3 < 0.3 2.3 29 1.3 0.06 1.6 1.3 < 2.0 < 0.3 91 Cake 08/08/16 AG52307 28.0% 0.9 < 0.3 < 0.3 1.6 35 1.1 0.05 1.8 1.0 < 1.4 < 0.3 130 Cake 11/01/16 AG53555 26.0% 1.0 < 0.3 < 0.3 2.0 32 1.0 < 0.008 2.0 1.0 < 1.5 < 0.3 100 Cake 02/13/17 AG54852 25.0% 0.8 < 0.2 < 0.2 1.9 28 1.8 0.04 1.3 1.5 < 1.2 1.4 70 Cake 05/22/17 AG56207 15.0% 0.4 < 0.2 < 0.2 0.9 16 0.9 0.05 0.9 0.7 < 0.8 < 0.2 44 Cake 08/15/17 AG57585 26.0% 0.8 < 0.3 < 0.3 1.6 36 0.9 0.06 1.7 1.4 < 1.3 < 0.3 140 Cake 11/14/17 AG58968 28.0% 1.3 < 0.1 0.2 1.8 82 1.3 0.10 2.8 1:3 0.5 0.5 280 Cake 02/21/18 AG60195 25.0% 0.6 < 0.3 < 0.3 1.6 28 0.7 0.04 1.4 1.0 < 1.2 < 0.3 78 Cake 06/13/18 AG61825 27.0% 0.8 < 0.3 < 0.3 1.4 46 0.9 0.05 2.6 0.9 < 1.3 0.4 120 Cake 09/19/18 AG63367 28.0% 1.1 < 0.3 0.6 2.2 53 1.1 0.07 3.4 1.4 < 1.4 0.6 140 Cake 11/28/18 AG64325 34.0% 1.4 < 0.3 0.3 3.1 48 1.4 0.08 3.7 1.7 < 1.7 0.3 120 Cake 02/13/19 AG65309 29% 0.7 < 0.3 < 0.3 2.6 32 0.8 0.18 1.8 1.6 < 1.4 < 0.3 81 Cake 06/19/19 AG67222 28% 0.8 < 0.3 < 0.3 2.0 54 3.0 0.05 2.0 2.0 < 1.4 < 0.3 130 Cake 09/18/19 AG68788 25% 1.2 < 0.3 0.3 2.5 48 1.2 0.06 2.8 1.5 < 1.2 0.3 152 Cake 12/03/19 AG69847 34% 1.0 < 0.3 0.4 2.4 37 1.4 0.10 1.9 1.4 < 1.6 < 0.3 100 Maximum 46.0% 1.4 < 1.0 1.0 5.0 82 8.9 0.50 5.6 5.0 3.0 3.9 280 Minimum 15.0% 0.4 < 0.1 < 0.2 0.2 16 0.7 < 0.01 0.6 0.7 < 0.5 < 0.2 44 Average 28.0% 0.9 0.3 0.3 2.1 48 2.0 0.13 2.2 1.5 1.6 0.6 113 #Tests 64 64 64 64 64 64 64 64 64 64 64 64 64 SOUTH TAHOE PUBLIC UTILITY DISTRICT WASTEWATER TREATMENT PLANT COMPLIANCE RECORD Number of Number Chemical of Compliance Year Tests Violations % Comments 1983 1,983 17 99.1 1984 2,480 61 97.5 1985 2,811 9 99.7 1986 3,146 69 97.8 1987 3,018 42 98.6 1988 3,323 9 99.7 1989 2,432 14 99.4 1990 2,098 0 100.0 1991 2,068 1 99.95 pH 1992 2,168 0 100.0 1993 2,163 2 99.91 COD, Set Solids 1994 2,152 0 100.0 1995 2,047 1 99.95 Settleable Solids 5/6/95=0.3 1996 2,064 0 100.0 1997 2,138 0 100.0 1998 2,149 0 100.0 1999 2,201 0 100.0 2000 2,110 0 100.0 2001 2,153 0 100.0 2002 2,137 0 100.0 2003 2,159 0 100.0 2004 2,078 0 100.0 2005 2,069 0 100.0 2006 2,191 0 100.0 2007 2,172 0 100.0 2008 2,159 0 100.0 2009 2,160 0 100.0 2010 2,161 0 100.0 2011 2,093 0 100.0 Stopped COD tests 06/2011 2012 2,063 0 100.0 2013 2,050 0 100.0 2014 2,054 0 100.0 2015 2,052 0 100.0 2016 2,042 0 100.0 Total Coliform by Quanti-Tray 2017 2,020 0 100.0 2018 2,032 0 100.0 2019 2,038 0 100.0 Results do not include flow measurements #Violations 0 20 40 60 80 100 £66L V96L 9961 986L L86L 886L 6861 066L ML Z66L 666L 966L 966L 966L v L66 L 966L n 666L =r OOOZ LOOZ ZOOZ m EOOZ VOOZ 900Z C• 900Z LOOZ 900Z 60OZ OLOZ (n LLOZ ZLOZ ELOZ 4LOZ 9LOZ 9LOZ LLOZ 9LOZ 6LOZ PRETREATMENT PROGRAM UPDATE PRETREATMENT ANNUAL REPORT COVER SHEET NPDES Permit Holder of Sewer Authority Name: South Tahoe Public Utility District Report Date: April 16, 2020 Period Covered by this Report: January 1, 2019 to December 31, 2019 Name of Wastewater Treatment Plant NPDES Permit Number South Tahoe Public Utility District Board Order No: R6T-2004-0010 WDIS No. 6A095900700 Person to contact concerning information contained in this report: Name: Jeff Lee Title: Plant Operations Manager Mailing Address 1276 Meadow Crest Drive South Lake Tahoe, CA 96150 Telephone No: (530) 544-6474 1 have personally examined and am familiar with the information submitted in this document and attachments. Based upon my inquiry of those individuals immediately responsible for obtaining the information reported herein, I believe that the submitted information is true, accurate, and complete. Date ignature of Official Plant Operations Manager Title ANNUAL PRETREATMENT REPORT 2019 Section 1 —Results of Wastewater Treatment Plant Sampling and Analysis The wastewater treatment plant influent, effluent and sludge were sampled December 3, 2019 for pollutants EPA has identified under Section 307(a) of the Clean Water Acton. The results are attached. Section 2—Upset, Interference, and Pass-Through Incidents No upset, interference, or pass-through events occurred during the period. Section 3—Baseline Monitoring Reports There was no industrial/commercial users notified regarding baseline monitoring requirements this period. Section 4—Updated List of Dischargers The list of industrial/commercial dischargers has been updated and is shown in table 4-A. This table indicates businesses added or deleted, and corresponding comments. Five (5) establishments were deleted because they were found to be no longer in business. Field verification and plan reviews have identified six (6) new businesses, which are included on the table. Section 5—Annual Industrial User Site Inspection Summary There were approximately 481 on-site inspections conducted during 2019. These inspections were primarily conducted at discharger, which have grease traps/interceptors and or sand/oil traps. However, this figure is considered conservative because many plan applications and reviews along with other functions assigned to District staff are done routinely. Section 6—Compliance and Enforcement Summary Inspections during the period covered in this pretreatment update resulted in the issuance 22 correction notices. Primarily, correction notices were issued for violations regarding grease trap/interceptor routine cleaning or other necessary repair work. Each correction notice issued was followed up by a re-inspection to ensure that the violation was-corrected. All violations resulted in appropriate corrective action to remedy the violation. Section 7—Pretreatment Program Changes No changes to the program occurred during this report period. Section 8—Annual Pretreatment Budget Summary The cost of operating the pretreatment program for the period covered in this report was approximately $15,000.00. The funding comes from the general operating fund. Due to the fact that there are no categorical or significant non-categorical industrial users, funds cannot be generated from user fees. Figures are based on Lab costs and two District Inspectors conducting on-site inspections of known users. No new equipment was purchased for the pretreatment program. Section 9—Sludge Disposal Changes No changes to the sludge disposal methods occurred this period. INDUSTRIAL USER LIST UPDATE 2019 Table 4-A GREASE TRAP/INTERCEPTOR&SAND/OIL INTERCEPTORS Inspectors Name: Master NEW . MNAME� ADD.,E$S���OMMENTiS� Gastromania 3095 Harrison Ave. Whole Foods 3600"A"Lake Tahoe Blvd. Bilou Market Place 3600"B"Lake Tahoe Blvd. Panda Express 3640"B"Lake Tahoe Blvd. 0 Five Gus 3640 Lake Tahoe Blvd. Chi otle 3640 Lake Tahoe Blvd. {NAME CHANGED �NEfflNAME � LDINEIME� T.V.Donuts 1036 Emerald Bay Rd. Rainbow Sprinkles Himalaya Grill 1142 Ski Run Blvd. Chima o Grill Ne hele's 1169 Ski Run Thai On Ski Run Lew Marnell's 901 Park Station House CLOSED �ADOR ,S. � CO EN S Burger Lounge 3132 HWY 50 Blue Angel 1132 Ski Run Blvd. Sato's Japanese Restraurant 3436 Lake Tahoe Blvd. _ Margarita's Restraurant 2494 Lake Tahoe Blvd. Hangar 2401 Lake Tahoe Blvd. ROUTE INFO How many traps/interceptors on your route? 257 How many total inspections were done? 481 How many correction notices were written? 22 SOUTH TAHOE PUBLIC UTILITY DISTRICT MEMORANDUM From The Lab Date: April 10, 2020 To: Jeff Lee, Manager.of Wastewater Operations Cuz Cullen, Inspection Supervisor From: Dan Arce, Laboratory Director Topic: EPA Priority Pollutants Samples were obtained from the Raw Influent, Final Effluent and Centrifuge Cake on December 3, 2019 and analyzed for metals and organic chemicals. Raw Influent and Final Effluent were 24-hour composites, with the exception the Raw and Final VOC's. The Raw and Final VOC's were grab samples obtained during high flow conditions. The Centrifuge Cake sample was an 8-hour composite sample , The samples were analyzed forthe Environmental Protection Agency's Priority Pollutant list to determine plant upset or pass-though. 1. Metals The Final Effluent had all total metal results below the drinking water Primary Maximum Contaminant Levels (MCL). The Raw Influent had Iron and Manganese detected above the Drinking water MCL. Both the Raw Influent and Final Effluent metal results were below the Soluble Threshold Limit Concentrations (STLC). The Centrifuge Cake(whole sample)had all metals below the Total Threshold Limit Concentrations(TTLC). Copper and Selenium were above the STLC but below 10 x STLC. The State allows results from the total metals tests to be compared with (10 x STLC) to determine whether there is risk of the leachate from the solid material being hazardous. If the total metals results are < (10 x STLC), the leachate is considered safe. If the total metals results are > (10 x STLC), a WET extraction of the solid material is performed,and compared against the STLC. April 10, 2020 Page 2 Metal Concentrations Sample date: December 3, 2019 Drinking Raw Final Water Compound Units Influent PQL Effluent PQL MCL Aluminum pg/L 300 100 ND 100 1,000 Antimony g/L ND 5 ND 2 6 Arsenic g/L ND 5 2 2 10 Barium pg/L 34 25 ND 10 1,000 Beryllium /L ND 5 ND 2 4 Cadmium g/L ND 5 ND 2 5 Calcium mg/L 21 1 16 1 Chromium mg/L ND 5 3 2 50 Cobalt g/L ND 5 ND 2 Copper g/L 36 5 15 2 1,000 Iron pg/L 800 100 100 100 300 Lead g/L ND 5 ND 2 15 Magnesium mg/L 5 1 3 1 Manganese g/L 64 5 36 2 50 Mercury g/L ND 0.1 ND 0.1 2 Molybdenum g/L 8 5 12 2 Nickel g/L ND 5 2 2 100 Potassium mg/L 11 1 10 1 Selenium g/L ND 25 ND 10 50 Silver g/L ND 5 ND 2 100 Sodium mg/L 43 1 47 1 Thallium g/L ND 2 ND 1 2 Vanadium g/L ND 5 ND 2 Zinc g/L 110 50 20 20 5,000 Notes:The sample for metals is a 24-hour flow-proportioned composite. DALahontan\Pdority Pollutants\Organics 2019.doc April 10, 2020 Page 3 Centrifuge Cake Metals Sample Date: November 28, 2018 Centrifuge Cake Date: 12/03/2019 ID: AG69847 Wet Weight STLC Result 10xSTLC TTLC mg/Kg mg/Kg mg/Kg mg/Kg > STLC 10xSTLC >TTLC Antimony 15 0.3 150 500 no no no Arsenic 5 1.0 50 50 no no no Barium 100 21 1,000 10,000 no no no Beryllium 0.75 < 0.3 7.5 75 no no no Cadmium 1 0.4 10 100 no no no Chromium 5 2.4 50 2,500 no no no Cobalt 80 < 0.3 800 8,000 no no no Copper 25 37 250 2,500 YES no no Lead 5 1.4 50 1,000 no no no Mercury 0.2 0.10 2 20 no no no Molybdenum 350 1.9 3,500 3,500 no no no Nickel 20 1.4 200 2,000 no no no Selenium 1 < 1.6 10 100 YES no no Silver 5 < 0.3 50 500 no no no Thallium 7 < 0.2 70 700 no no no Vanadium 24 3.2 240 2,400 no no no Zinc 250 100 2,500 5,000 no no no DALahontan\Priority Pollutants\Organics 2019.doc April 10, 2020 Page 4 2. Organic Analyses Volatile Organic Chemicals(VOCs), Semi volatile Organic Compounds, Chlorinated Pesticides and Chlorinated Herbicides were tested in the Raw Influent, Final Effluent and Centrifuge Cake. The detected compounds are tabulated below. Organic Compounds Test Results Detections November 28, 2018 Raw Final Centrifuge Influent Effluent Cake Compound g/L Hg/L g/Kg Acetone 80 ND 333,000 2-Butanone (MEK) ND ND 115,000 Phenol 1.0 ND ND Pyridine 2.0 ND ND Toluene 2.6 1.0 496 ND: Not Detected DALahontan\Priority Pollutants\Organics 2019.doc Silver State Labs-Reno January 02,2020 SilverState 1135 Financial Blvd Workorder 19120267 j Analytical laboratories Reno,NV 89502 •Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 www.ssalabs.com Dan Arce SOUTH TAHOE PUBLIC UTILITY DISTRICT 1275 Meadow Crest Drive South Lake Tahoe,CA 96150 Project: WW-01 Raw Influent Dear Dan Arce: It is the policy of Silver State Analytical Laboratory-Reno to strictly adhere to a comprehensive Quality Assurance Plan that ensures the data presented in this report are both accurate and precise.Silver State Analytical Laboratory-Reno maintains accreditation in the State of Nevada(NV-00015)and the State of California(ELAP 2990). The data presented in this report was obtained from the analysis of samples received under a chain of custody.Unless otherwise noted below,samples were received in good condition,properly preserved and within the hold time for the requested analyses.Any anomalies associated with the analysis of the samples have been flagged with an appropriate explanation in the Analysis Report section of the Laboratory Report. Prep Comments for EPA 3050,Sample 19120267-04A:Calculation Revised Report:Added Mn to-02. Sincerely, Carly Wood Laboratory Director 1135 Financial Blvd Reno,NV 89502 Revision vl Page 1 of 14 silver state Labs-Reno Analytical Report Si IverState 1135 Financial Blvd Analytical Laboratories Reno,NV 89502 Workorder#: 19120267 isSierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 Date Reported: 1/2/2020 www.ssalabs.com Client: SOUTH TAHOE PUBLIC UTILITY DISTRICT Sampled By: AUTO/ DPS Project Name: WW-01 Raw Influent PO#: Laboratory Accreditation Number: NV015/CA2990 Laboratory ID Client Sample ID Date/Time Sampled Date Received 19120267-01 WW-01 Raw Influent 12/03/2019 5:00 12/5/2019 Date/Time Data Parameter Method Result Units PQL Analyst Analyzed Flag Aluminum EPA 200.7 0.3 mg/L 0.1 KL 12/13/2019 11:49 Antimony EPA 200.8 <0.005 mg/L 0.005 KL 12/07/2019 17:13 Arsenic EPA 200.8 <0.005 mg/L 0.005 KL 12/07/2019 17:13 Barium EPA 200.8 0.034 mg/L 0.025 KL 12/07/2019 17:13 Beryllium EPA 200.8 <0.005 mg/L 0.005 KL 12/07/2019 17:13 Cadmium EPA 200.8 <0.005 mg/L 0.005 KL 12/07/2019 17:13 Calcium EPA 200.7 21 mg/L 1 KL 12/13/2019 11:49 Chromium EPA 200.8 <0.005 mg/L 0.005 KL 12/07/2019 17:13 Cobalt EPA 200.8 <0.005 mg/L 0.005 KL 12/07/2019 17:13 Copper EPA 200.8 0.036 mg/L 0.005 KL 12/07/2019 17:13 Iron EPA 200.7 0.8 mg/L 0.1 KL 12/13/2019 11:49 Lead EPA 200.8 <0.005 mg/L 0.005 KL 12/07/2019 17:13 Magnesium EPA 200.7 5 mg/L 1 KL 12/13/2019 11:49 Manganese EPA 200.8 0.064 mg/L 0.005 KL 12/07/2019 17:13 Mercury EPA 245.1 <0.0001 mg/L 0.0001 KL 12/18/2019 14:27 Molybdenum EPA 200.8 0.008 mg/L 0.005 KL 12/07/2019 17:13 Nickel EPA 200.8 <0.005 mg/L 0.005 KL 12/07/2019 17:13 Potassium EPA 200.7 11 mg/L 1 KL 12/13/2019 11:49 Selenium EPA 200.8 <0.025 mg/L 0.025 KL 12/07/2019 17:13 Silver EPA 200.8 <0.005 mg/L 0.005 KL 12/07/2019 17:13 Sodium EPA 200.7 43 mg/L 1 KL 12/13/2019 11:49 Thallium EPA 200.8 <0.0025 mg/L 0.0025 KL 12/07/2019 17:13 Vanadium EPA 200.8 <0.005 mg/L 0.005 KL 12/07/2019 17:13 Zinc EPA 200.8 0.11 mg/L 0.05 KL 12/07/2019 17:13 Revision vl Pa_e 2 of 14 Silver State Labs-Reno Analytical Report l l35 Financial BlvdSilverState Analytical Laboratories Reno,vv 89502 (775)857-2400 FAX:(sss)398-7002 Workorder#: 19120267 •Sierra Environmental Monitoring www.ssalabs.com P Date Reported: 1/2/2020 Client: SOUTH TAHOE PUBLIC UTILITY DISTRICT Sampled By: AUTO/ DPS Project Name: WW-01 Raw Influent PO#: Laboratory Accreditation Number: NV015/CA2990 Laboratory ID Client Sample ID Date/Time Sampled Date Received 19120267-02 WW-04 Final Effluent 12/03/2019 7:44 12/5/2019 Date/Time Data Parameter Method Result Units PQL Analyst Analyzed Flag Aluminum EPA 200.7 <0.1 mg/L 0.1 KL 12/13/2019 11:51 Antimony EPA 200.8 <0.002 mg/L 0.002 KL 12/07/2019 17:20 Arsenic EPA 200.8 0.002 mg/L 0.002 KL 12/07/2019 17:20 Barium EPA 200.8 <0.01 mg/L 0.01 KL 12/07/2019 17:20 Beryllium EPA 200.8 <0.002 mg/L 0.002 KL 12/07/2019 17:20 Cadmium EPA 200.8 <0.002 mg/L 0.002 KL 12/07/2019 17:20 Calcium EPA 200.7 16 mg/L 1 KL 12/13/2019 11:51 Chromium EPA 200.8 0.003 mg/L 0.002 KL 12/07/2019 17:20 Cobalt EPA 200.8 <0.002 mg/L 0.002 KL 12/07/2019 17.20 Copper EPA 200.8 0.015 mg/L 0.002 KL 12/07/2019 17:20 Iron EPA 200.7 0.1 mg/L 0.1 KL 12/13/2019 11:51 Lead EPA 200.8 <0.002 mg/L 0.002 KL 12/07/2019 17:20 Magnesium EPA 200.7 3 mg/L 1 KL 12/13/2019 11:51 Manganese EPA 200.8 0.036 mg/L 0.002 KL 12/07/2019 17:20 Mercury EPA 245.1 <0.0001 mg/L 0.0001 KL 12/18/2019 14:27 Molybdenum EPA 200.8 0.012 mg/L 0.002 KL 12/07/2019 17:20 Nickel EPA 200.8 0.002 mg/L 0.002 KL 12/07/2019 17:20 Potassium EPA 200.7 10 mg/L 1 KL 12/13/2019 11:51 Selenium EPA 200.8 <0.01 mg/L 0.01 KL 12/07/2019 17:20 Silver EPA 200.8 <0.002 mg/L 0.002 KL 12/07/2019 17:20 Sodium EPA 200.7 47 mg/L 1 KL 12/13/2019 11:51 Thallium EPA 200.8 <0.001 mg/L 0.001 KL 12/07/2019 17:20 Vanadium EPA 200.8 <0.002 mg/L 0.002 KL 12/07/2019 17:20 Zinc EPA 200.8 0.02 mg/L 0.02 KL 12/07/2019 17:20 Revision v 1 Pace 3 of 14 Siher State Labs-Reno Analytical Report AASilverState 1135 Financial Bhd Analytical Laboratories Reno•w 8950z • (775)857-2400 FAX:(S8R)39R-7002 Workorder#: 19120267 Sierra Environmental Monitoring Date Reported: 1/2/2020 www.ssalabs.com P Client: SOUTH TAHOE PUBLIC UTILITY DISTRICT Sampled By: AUTO/DPS Project Name: WW-01 Raw Influent PO#: Laboratory Accreditation Number: NV015/CA2990 Laboratory ID Client Sample ID Date/Time Sampled Date Received 19120267-03 W W-10 Centrifuge Cake-Dry 12/03/2019 8:00 12/5/2019 Date/Time Data Parameter Method Result Units PQL Analyst Analyzed Flag Antimony EPA 6020 1 mg/Kg 1 KL 12/07/2019 21:47 Arsenic EPA 6020 3 mg/Kg 1 KL 12/07/2019 21:47 Barium EPA 6020 63 mg/Kg 5 KL 12/07/2019 21:47 Beryllium EPA 6020 <1 mg/Kg 1 KL 12/07/2019 21:47 Cadmium EPA 6020 1 mg/Kg 1 KL 12/07/2019 21:47 Chromium EPA 6020 7 mg/Kg 1 KL 12/07/2019 21:47 Cobalt EPA 6020 <1 mg/Kg 1 KL 12/07/2019 21:47 Copper EPA 6020 110 mg/Kg 1 KL 12/07/2019 21:47 Lead EPA 6020 4 mg/Kg 1 KL 12/07/2019 21:47 Manganese EPA 6020 59 mg/Kg 1 KL 12/07/2019 21:47 Mercury SW-846 7471E 0.30 mg/Kg 0.03 KL 12/13/2019 8:46 Molybdenum EPA 6020 6 mg/Kg 1 KL 12/07/2019 21:47 Nickel EPA 6020 4 mg/Kg 1 KL 12/07/2019 21:47 Selenium EPA 6020 <5 mg/Kg 5 KL 12/07/2019 21:47 Silver EPA 6020 <1 mg/Kg 1 KL 12/07/2019 21:47 Thallium EPA 6020 <0.5 mg/Kg 0.5 KL 12/07/2019 21:47 Vanadium EPA 6020 10 mg/Kg 1 KL 12/07/2019 21:47 Zinc EPA 6020 320 mg/Kg 10 KL 12/07/2019 21:47 Revision vl Pa_e 4 of 14 Silver State Labs-Reno Analytical Report AA SilverState 1135 Financial Blvd i" Analytical Laboratories Reno,Nv 89502 Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 • Workorder#: 19120267 www.ssalabs.com Date Reported: 1/2/2020 Client: SOUTH TAHOE PUBLIC UTILITY DISTRICT Sampled By: AUTO/ DPS Project Name: WW-01 Raw Influent PO#: Laboratory Accreditation Number: NV015/CA2990 Laboratory ID Client Sample ID Date/Time Sampled Date Received 19120267-04 WW-10 Centrifuge Cake-Wet 12/03/2019 8:00 12/5/2019 Date/Time Data Parameter Method Result Units PQL Analyst Analyzed Flag Antimony EPA 6020 0.3 mg/Kg 0.3 KL 12/09/2019 15:50 Arsenic EPA 6020 1 mg/Kg 0.3 KL 12/09/2019 15:50 Barium EPA 6020 21 mg/Kg 1.6 KL 12/09/2019 15:50 Beryllium EPA 6020 <0.3 mg/Kg 0.3 KL 12/09/2019 15:50 Cadmium EPA 6020 0.4 mg/Kg 0.3 KL 12/09/2019 15:50 Chromium EPA 6020 2.4 mg/Kg 0.3 KL 12/09/2019 15:50 Cobalt EPA 6020 <0.3 mg/Kg 0.3 KL 12/09/2019 15:50 Copper EPA 6020 37 mg/Kg 0.3 KL 12/09/2019 15:50 Lead EPA 6020 1.4 mg/Kg 0.3 KL 12/09/2019 15:50 Manganese EPA 6020 20 mg/Kg 0.3 KL 12/09/2019 15:50 Mercury SW-846 7471 B 0.10 mg/Kg 0.01 KL 12/13/2019 8:46 Molybdenum EPA 6020 1.9 mg/Kg 0.3 KL 12/09/2019 15:50 Nickel EPA 6020 1.4 mg/Kg 0.3 KL 12/09/2019 15:50 Percent Moisture SM 2540 G 66 % 0.1 KL 12/05/2019 12:40 Selenium EPA 6020 <1.6 mg/Kg 1.6 KL 12/09/2019 15:50 Silver EPA 6020 <0.3 mg/Kg 0.3 KL 12/09/2019 15:50 Thallium EPA 6020 <0.2 mg/Kg 0.2 KL 12/09/2019 15:50 Vanadium EPA 6020 3.2 mg/Kg 0.3 KL 12/09/2019 15:50 Zinc EPA 6020 100 mg/Kg 3.3 KL 12/09/2019 15:50 Revision v 1 Page 5 of 14 tiiher State Labs-Reno Quality Control Report SilverState 1135 Financial Bhd Analytical Laboratories Reno,vv'89502 WO�-,: 19120267 •Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 l/2/2020 www.ssalabs.com Analvsis: Metals 200.8 Method: EPA 200.8 Batch ID: R36278 Method Blank RunID: 36278 SegNo 857439 Units: mg/L Analysis Date: 12/7/2019 4:27:02 PM Analyst: KL Analyte Result Rep Limit Rep Qual Antimony <0.0020 0.0020 Arsenic <0.0020 0.0020 Barium <0.010 0.010 Beryllium <0.0020 0.0020 Cadmium <0.0020 0.0020 Chromium <0.0020 0.0020 Cobalt <0.0020 0.0020 Copper <0.0020 0.0020 Lead <0.0020 0.0020 Manganese <0.0020 0.0020 Molybdenum <0.010 0.010 Nickel <0.0020 0.0020 Selenium <0.010 0.010 Silver <0.0020 0.0020 Thallium <0.0010 0.0010 Vanadium <0.0020 0.0020 Zinc I <0.0201 0.020 Laboratory Control Sample ILCSI RunID: 36278 SegNo 857425 Units: mg/L Analysis Date: 12/7/2019 2:54:13 PM Analyst: KL Analyte LCS LCS Result LCS% LCSD LCSD LCSD% RPD RPD Low High Qual Spike Recovery Spike Result Recovery Limit Limit Limit Added Added Antimony 0.1000 0.11 107 Arsenic 0.1000 0.10 101 Barium 0.1000 0.101 102 Beryllium 6.1000 0.11 107 Cadmium 0.1000 0.10 102 Chromium 0.1000 0.10 101 Cobalt 0.1000 0.10 102 Copper 0.1000 0.10 103 Lead 0.1000 0.101 104 Manganese 0.1000 0.10 102 Molybdenum 0.1000 0.10 102 Nickel 0.1000 0.11 105 Selenium 0.5000 0.51 101 Silver 0.1000 0.10 104 Thallium 0.1000 0.101 104 Vanadium 0.1000 0.099 99.3 Zinc 0.1000 0.101 105 Revision vl Pu-)c 0 o1'14 SiherStateLabs-Reno Quality Control Report AA SilverState 1135 Financial Blvd Analytical Laboratories Reno,`y'89502 wo=: 19120267 •Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 1/2/2020 www.ssalabs.com Matrix Spike(MS)/Matrix Spike Duolicate(MSD) Sample Spiked: 19120267-02A RunID: 36278 SegNo 857450 Units: mg/L Analysis Date: 12/7/2019 5:39:59 PM Analyst: KL Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Low High Qual Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Antimony 0006684 1.000 1.2 118 1.000 1.2 124 5.15 20 70 130 Arsenic .002438 1.000 0.96 95.4 1.000 0.99 98.4 3.03 20 70 130 Barium .009936 1.0001 0.99 97.7 1.000 1.0 102 3.91 20 70 130 Beryllium 004722 1.000 1.1 107 1.000 1.1 105 1.72 20 70 130 Cadmium 0 1.000 1.0 99.8 1.000 1.0 103 3.33 20 70 130 Chromium .002656 1.000 0.95 94.5 1.000 0.99 98.31 3.93 20 70 130 Cobalt 007146 1.000 0.95 94.7 1.000 1.0 99.6 5.09 20 70 130 Copper 0.01454 1.000 0.98 96.1 1.000 1.0 100 4.18 20 70 130 Lead 3005454 1.0001 0.98 98.01 1.000 1.0 101 3.41 20 70 130 Manganese 0.03579 1.000 0.98 94.3 1.000 1.0 99.3 4.94 20 701 130 Molybdenum 0.01169 1.000 0.98 96.7 1.000 1.01 102 5.631 20 70 130 Nickel 1,002117 1.000 0.99 98.5 1.000 1.0 102 3.61 20 70 130 Selenium .003975 5.000 4.9 97.4 5.000 5.1 101 3.77 20 70 130 Silver 0 0.1000 0.099 99.4 0.1000 0.11 106 6.18 20 70 130 Thallium D0027401 1.0001 0.98 97.91 1.000 0.99 99.0 1.12 20 70 130 Vanadium 01 1.0001 0.95 95.0 1.000 0.99 99.0 4.14 201 701 30 Zinc 0.02250 1.000 1.0 98.2 1.000 1.0 101 3.17 20 70 130 Analysis: Metals 6020 Solid Method: EPA 6020 Batch ID: R36280 Method Blank RunID: 36280 SegNo 857996 Units. mg/Kg Analysis Date: 12/7/2019 9:07:41 PM Analyst: KL Analyte Result Rep Limit Rep Qual Antimony <0.0020 0.0020 Arsenic <0.0020 0.0020 Barium <0.010 0.010 Beryllium <0.0020 0.0020 Cadmium <0.0020 0.0020 Chromium 0.0029 0.0020 B Cobalt <0.0020 0.0020 Copper <0.0020 0.0020 Lead <0.0020 0.0020 Manganese <0.0020 0.0020 Molybdenum <0.010 0.010 Nickel <0.0020 0.0020 Selenium <0.010 0.010 Silver <0.0020 0.0020 Thallium <0.0010 0.0010 Vanadium <0.0020 0.0020 Zinc <0.0201 0.020 Revision v I Paer 7 o1'14 Silver State Labs-Reno Quality Control Report AASilverState 1135 Financial Blvd Analytical Laboratories Reno,NV 89502 WOE: 19120267 •Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 1/2/2020 www.ssalabs.com Laboratory Control Sample(LCS) RunlD: 36280 SegNo 857987 Units: mg/L Analysis Date: 12/7/2019 8:07:58 PM Analyst: KL Analyte LCS LCS Result LCS% LCSD LCSD LCSD% RPD RPD Low High Qual Spike Recovery Spike Result Recovery Limit Limit Limit Added Added Antimony 0.1000 0.11 109 Arsenic 0.1000 0.098 98.1 Barium 0.1000 0.101 100 Beryllium 0.1000 0.098 98.5 Cadmium 0.1000 0.10 99.9 Chromium 0.1000 0.098 97.9 Cobalt 0.1000 0.10 100 Copper 0.1000 0.10 103 Lead 0.1000 0.101 100 Manganese 0.1000 0.10 101 Molybdenum 0.1000 0.098 97.8 Nickel 0.1000 0.098 97.9 Selenium 0.5000 0.50 100 Silver 1 0.1000 0.10 100 Thallium 0.1000 0.10 101 Vanadium 0.1000 0.10 101 Zinc 0.1000 0.099 99.1 Matrix Spike(MS)/Matrix Spike Duolicate(MSD) Sample Spiked: 19120267-03A RunlD: 36280 SegNo 858003 Units: mg/Kg Analysis Date: 12/7/2019 9:54:07 PM Analyst: KL Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Low High Qual Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Antimony 1.987 100.0 100 98.3 100.0 120 120 19.4 20 70 130 Arsenic 5.673 100.0 110 103 100.0 110 106 2.62 20 70 130 Barium 72.39 100.01 170 97.1 100.0 170 102 2.62 20 70 130 Beryllium 0 100.0 100 102 100.0 110 113 9.94 20 70 130 Cadmium 2.375 100.0 110 104 100.0 110 110 5.09 20 70 130 Chromium 40.83 100.0 120 74.3 100.0 120 78.5 3.64 20 70 130 Cobalt 1.109 100.0 110 106 100.0 120 115 8.29 20 70 130 Copper 130.1 100.0 220 89.0 100.0 230 99.3 4.59 20 70 130 Lead 4.439 100.01 110 1031 100.0 110 110 7.03 20 70 130 Manganese 65.41 100.0 170 104 100.0 1801 114 5.791 20 701 130 Molybdenum 14.95 100.0 110 92.4 100.0 120 102 8.45 20 70 130 Nickel 9.498 100.0 110 101 100.0 100 94.5 5.99 20 70 130 Selenium 7.873 500.0 520 102 500.0 560 111 8.13 20 70 130 Silver 0.7570 10.00 11 98.4 10.00 12 113 13.1 20 70 130 Thallium 0.5120 100.01 100 102 100.0 110 112 9.33 20 70 130 Vanadium 6.375 100.0 110 107 100.01 1301 1221 12.31 20 70 130 Zinc 353.4 100.01 460 111 100.01 4601 1041 1.541 20 70 130 Revision vl Pa,_,e 8 o1'14 Siher State Labs-Reno Quality Control Report Si IverState 1135 Financial Blvd Analytical Laboratories Reno,w 89502 WO=: 19120267 •Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 1/2/2020 www.ssalabs.com Analysis: Metals 200.7 Method: EPA 200.7 Batch ID: R36454 Method Blank RunID: 36454 SegNo 861190 Units: mg/L Analysis Date: 12/13/2019 11:36:47 AM Analyst: KL Analyte Result Rep Limit Rep Qual Aluminum <0.050 0.050 Calcium <0.50 0.50 Iron <0.050 0.050 Magnesium <0.50 0.50 Potassium <0.50 0.50 Sodium I <0.501 0.50 Laboratory Control Samole(LCS) RunID: 36454 SegNo 861269 Units: mg/L Analysis Date: 12/13/2019 9:21:20 AM Analyst: KL Analyte LCS LCS Result LCS% LCSD LCSD LCSD% RPD RPD Low High Qua[ Spike Recovery Spike Result Recovery Limit Limit Limit Added Addedi I Aluminum 6.000 6.0 100 Calcium 30.00 30 101 Iron 1 6.0001 6.1 101 Magnesium 30.00 30 101 Potassium 30.00 30 100 Sodium Ej 30.00 301 101 Matrix Spike(MS)/Matrix Spike Duolicate(MSD) Sample Spiked: 19120267-02A RunID: 36454 SegNo 861207 Units: mg/L Analysis Date: 12/13/2019 11:58:17 AM Analyst: KL Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Low High Qual Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Aluminum 0.05258 5.000 4.9 97.6 5.000 5.0 98.6 1.01 20 70 130 Calcium 15.90 20.00 35 94.9 20.00 35 95.5 0.332 20 70 130 Iron 1 0.13361 5.0001 5.11 99.4 5.000 5.2 101 1.18 201 70 130 Magnesium 3.4741 20.001 241 1011 20.00 24 101 0.470 201 701 130 Potassium 9.5231 20.001 291 97.91 20.001 291 98.4 0.332 201 701 130 Sodium 46.931 20.001 661 94.01 20.001 661 94.31 0.1091 201 701 130 Analysis: Mercury, RCRA Solid Method: SW-846 7471B Batch ID: R36521 Method Blank RunID: 36521 SegNo 863342 Units: mg/Kg Analysis Date: 12/13/2019 8:46:24 AM Analyst: KL Analyte Result I Rep Lim[t Rep Qual Revision vl Page 9 of 14 SiI ,late Labs-Reno Quality Control Report AA SilverState 1135 Financial Bhd Analytical Laboratories Reno,w 89502 WO--: 19120267 •Sierra Environmental Monitoring (775)857-2400 FAQ(:(888)398-7002 1/2/2020 www.ssalabs.com Mercury 1 <0.0001 0.0001 Laboratory Control Sample(LCSI RunlD: 36521 SegNo 863343 Units: mg/Kg Analysis Date: 12/13/2019 8:46:24 AM Analyst: KL Analyte LCS LCS Result LCS% LCSD LCSD LCSD% RPD RPD Low High Qual Spike Recovery Spike Result Recovery Limit Limit Limit Added Added Mercury 0.006000 0.006281 105 Matrix Spike(MS)/Matrix Spike Duplicate(MSDI Sample Spiked: 19120267-03A RunID: 36521 SegNo 863346 Units: mg/Kg Analysis Date: 12/13/2019 8:46:24 AM Analyst: KL Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Low High Qual Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Mercury 0.3000 0.9750 1.031 74.910.97501 1.091 81.01 5.661 201 701 130 Analysis: Mercury, RCRA Method: EPA 7470 Batch ID: R36600 Matrix Spike(MS)/Matrix Spike Duplicate(MSDI Sample Spiked: 19120510-02A RunlD: 36600 SegNo 865492 Units: mg/L Analysis Date: 12/18/2019 2:27:10 PM Analyst: KL Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Low High Qual Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added f I Mercury 0.09.8001 O.5000f 0.560 --w.4T65doT-65481 90.01 2.171 201 801 120 Analysis: Mercury Method: EPA 245.1 Batch ID: R36600 Method Blank RunlD: 36600 SegNo 865466 Units: mg/L Analysis Date: 12/18/2019 2:27:10 PM Analyst: KL Analyte Result Rep Limit Rep Qual Mercury I <0.00011 0.0001 Laboratory Control Sample(LCS) RunlD: 36600 SegNo 865467 Units: mg/L Analysis Date: 12/18/2019 2:27:10 PM Analyst: KL Analyte LCS LCS Result LCS% LCSD LCSD LCSD% RPD RPD Low High Qual Spike Recovery Spike Result Recovery Limit Limit Limit Added Added Mercury 0.006000 0.005861 97.7 Revision vl Paue Ill of 14 Sil'er State Labs-Reno Quality Control Report AA Si IverState 1135 Financial Blvd Analytical Laboratories Reno,`V 89502 won: 19120267 •Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 1/2/2020 www.ssalabs.com Matrix Spike(MS)/Matrix Soike Duplicate(MSDI Sample Spiked: 19120267-01A RunID: 36600 SegNo 865471 Units: mg/L Analysis Date: 12/18/2019 2:27:10 PM Analyst: KL Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Low High at Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Mercury 0 005000 .00472 94.4 005000).004781 95.6 1.261 20 701 130 Matrix Soike(MS)/Matrix Soike Duplicate(MSD► Sample Spiked: 19120716-01 B RunID: 36600 SegNo 865487 Units: mg/L Analysis Date: 12/18/2019 2:27:10 PM Analyst: KL Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Low High Qual Result Spike Result Recovery Spike Result Recovery Limit Limit Limit Added Added Mercury .001170 005000 .00614 99.4100500+006051 97.61 1.481 201 701 130 Revision v 1 Pane I I of 14 SOUTH TAHOE PUBLIC UTILITY DISTRICT c) v (v CHAIN OF CUSTODY South Tahoe Public Utility District u7" Lab Sent to L Turnaround Time 1275 Meadow Crest Drive At�ai Ses Requested South Lake Tahoe. CA 96150 Standard i��„ �apler — � Phone: (530)-543-6231 >c ��� o;s�` + 1�� FAX (9,901-541-4296 I 24 Hr U T n a- �^ -N " 48 Hr _ Erc:ect Er r IC�Cfr� �I\�G° Vie'1i?trrrr,3c, �o Other 0 C •v U n , o Lab ID* _ . .. 5tpt 33c�Ite ------ ._-����- >-f �_- Frrs�,'vt' rti'iltrix '� a R'>?lnatits - �n � r'•i� %2 i� i � ,r Jl f�`, C{};,�! � ;� c' � ­OY F 2q h,, L6-9 Z L tr I L 31JL ✓ .�o Comments: Relinqu shed by - / Received by Report M iBE to 0 5 µg,L Note any detection of MTBE>_02 µg/L o Analyze Travel and Field Blanks only if VOCs detected in samples Signatur _ _ LJL/ Signature ❑ Use Calif State Write-On form to report results of Potable Water Wells Print 1 c r W _ _ Print Company ,South Tahoe Public Utility District Company_ c5�L Please Return all STPUD ice chests & Blue Ice. Date Z - Time _ Date -S- I Time /t2:0D SalT7€110 Ret'eiµ1 Yes,`#y�7.. gtrrment .: Relinquished by Received by Received intact Signature Iq A l 0,? _ Signature______ Received cold <4 Print Print Custody seals N Company Company Correct container irate: I ime Date: Time - - ILatlForms�Chain of Custody.doc Page Of •el 1950 • 5outh Tahoe Warer public Utility District 1275 Meadow Crest Drive•5outh Lake Tahoe•CA 96150-7401 Phone 530 544-6474•Fax 530 541-0614•www.5tpud.u5 Wednesday, December 04, 2019 Sierra Environmental Monitoring 1135 Financial Blvd Reno, NV 89502 Dear Lab Please analyze all three samples for the following metals: Aluminum Cobalt Nickel Antimony. Copper Potassium Arsenic . Iron Selenium Barium Lead Silver Beryllium Magnesium Sodium Cadmium Manganese . Thallium Calcium Mercury Vanadium , Chromium Molybdenum Zinc The centrifuge cake sample is to be tested for California's TTLC or Wastewater EPA Priority Pollutant metals. Please use the lowest detection limits possible and use the methods appropriate for metals analysis for compliance with wastewater regulations. Report results as both wet weight and dry weight for the Centrifuge Cake sample For the Centrifuge Cake sample, run the STLC for any metal whose result for the TTLC is >_ 10 X STLC. Please return the ice chest and ice packs. Sincerely yours, i, Dan Arce Laboratory Director \\YAK\Public\LAB\D_DRIVE\Lab\Forms\Priority_Pollutants-Centrifuge_Cake\PriorityPollutantMetals-SEM.doc Page 13 of 14 Silver State Labs-Reno Definitions & Qualifiers SlIverState 1135 Financial Blvd Analytical Reno,NV 89502 WO#: 19120267 •Sierra Environmental Monitoring (775)857-2400 FAX:(888)398-7002 Date: 1/2/2020 www.ssalabs.com Definitions: LCS: Laboratory Control Sample;prepared by adding a known mass of target analytes to a specified amount of de-ionized water and prepared with the batch of samples,used to calculate Accuracy(%REC). LCSD: LCS Duplicate;used to calculate both Accuracy(%REC)and Precision(%RPD) MBLK:Method Blank;a sample of similar matrix that is processed simultaneously with and under the same conditions as samples through all steps of the analytical procedure,and in which no target analytes or interferences are present at concentrations that impact the analytical results for sample analyses. MS:Matrix Spike;prepared by adding a known mass of target analytes to a specified amount of matrix sample for which an independent estimate of target analyte concentration is available,used to calculate Accuracy(%REC) MSD:Matrix Spike Duplicate;used to calculate both Accuracy(%REC)and Precision(%RPD) RPD: Relative Percent Difference;comparison between sample and duplicate and/or MS and MSD. PQL:Practical Quantitation Limit;the limit to which data is quantitated for reporting. MDL: Method Detection Limit;the limit to which the instrument can reliably detect. MCL:Maximum Contaminant Level;value set according to EPA guidelines. Qualifiers: *-Analyte exceeds Safe Drinking Water Act MCL,does not meet drinking water standards. C-Analyte value below Safe Drinking Water Act MCL,does not meet drinking water standards. B-Analyte found above the PQL in associated method blank. G-Calibration blank analyte detected above PQL. H-Sample analyzed beyond holding time for this parameter. J-Estimated Value;Analyte found between MDL and PQL limits. L-Sample concentration is at least 5 times greater than spike contribution.Spike recovery criteria do not apply. R-RPD between sample and duplicate sample outside the RPD acceptance limits. S-Batch MS and/or MSD were outside acceptance limits,batch LCS was acceptable. W-Sample temperature when recieved was out of limit as specified by method. Revision vl Page 14 of 14 ENVIRONMENTALFIGL AGRICULTURAL Analytical Chemists December 20, 2019 South Tahoe Public Utility District 1275 Meadow Crest Drive South Lake Tahoe,CA 96150 Subject: Subcontract Analyses for FGL Lab No. SP 1916583 Enclosed please find results for the following sample(s) which were received by FGL. • Sub Contracted-8081 • Sub Contracted-8082 Please note that this analysis was performed by Babcock Laboratories, Inc. (ELAP Certified Laboratory) Thank you for using FGL Environmental. Sincerely, ( �mny ue—i by(,Wy nru Cindy Aguirre ®rnkcwmr,�;, krmm Dm -10(9-(1_-110 Enclosure 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 1 Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX.(805)783-2912 FAX:(559)7348435 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 0@04D BABCOCK Laboratories, Inc. The Standard of Excellence firr Over/00 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 1 of 9 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 1916583-(2-11369) Santa Paula, CA 93060 Work Order Number: 139L1173 Report Date: 20-Dec-2019 Received on Ice(Y/N): Yes Temp: 4 °C Attached is the analytical report for the sample(s) received for your project. Below is a list of the individual sample descriptions with the corresponding laboratory number(s). Also, enclosed is a copy of the Chain of Custody document(if received with your sample(s)). Please note any unused portion of the sample(s) may be responsibly discarded after 30 days from the above report date, unless you have requested otherwise. Thank you for the opportunity to serve your analytical needs. If you have any questions or concerns regarding this report please contact our client service department. Sample Identification Lab Sample# Client Sample ID Matrix Date Sampled B Date Submitted By 691-1173-01 Centrifuge Cake Solid 12/3/19 0:00 OPS/LDA/ML 12/06/19 10:10 Courier(GSO) mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502.0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 000 BABCOCK Laboratories, Inc. 171, 77,n U:,r 100 )rr;i' Client Name: FGL Environmental, Inc. Analytical Report: Page 2 of 9 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 1916583-(2-11369) Santa Paula, CA 93060 Work Order Number: B91-1173 Report Date: 20-Dec-2019 Received on Ice(Y/N): Yes "Temp: 4 °C Laboratory Reference Number B9L1173-01 Sample Description Matrix Sampled Date/Time Received Date/Time Centrifuge Cake Solid 12/03/19 00:00 12/06/19 10:10 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Organochlorine Pesticides and PCBs by EPA 8000 Series 4,4'-DDD ND 600 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm 4,4'-DDE ND 440 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm 4,4'-DDT ND 660 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm, NCALlm a-BHC ND 550 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm Aldrin ND 330 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm b-BHC ND 550 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm, NCALIm Chlordane ND 4100 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm d-BHC ND 1100 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm Dieldrin ND 440 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm Endosulfan I ND 440 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm Endosulfan II ND 660 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm Endosulfan Sulfate ND 1600 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm, NCALIm Endrin ND 440 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm Endrin Aldehyde ND 1100 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm, NCALlm Heptachlor ND 380 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm, NCALIm Heptachlor Epoxide ND 440 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm Hexachlorobenzene ND 5500 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm Lindane ND 710 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm, NCALIm Methoxychlor ND 4300 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm, NCALIm Toxaphene ND 14000 ug/kg dry EPA 8081A 12/16/19 20:47 JHR N_RLm Aroclor 1016 ND 18000 ug/kg dry EPA 8082 12/13/19 23:54 JHR N_RLm Aroclor 1221 ND 18000 ug/kg dry EPA 8082 12/13/19 23:54 JHR N_RLm Aroclor 1232 ND 18000 ug/kg dry EPA 8082 12/13/19 23:54 JHR N_RLm Aroclor 1242 ND 18000 ug/kg dry EPA 8082 12/13/19 23:54 JHR N_RLm Aroclor 1248 ND 18000 ug/kg dry EPA 8082 12/13/19 23:54 JHR N_RLm Aroclor 1254 ND 18000 ug/kg dry EPA 8082 12/13/19 23:54 JHR N_RLm Aroclor 1260 ND 18000 ug/kg dry EPA 8082 12/13/19 23:54 JHR N_RLm Surrogate:Decachlorobiphenyl 62.1 Ro 10-216 EPA 8081A 12/16/19 20:47 JHR N RLm mailing location P 951 65:3 3351 CA ELAP No.2698 P.O Box 4:32 6100 Quail Valley Court F 951 65:3 1662 EPA No.CA00102 Riverside,CA 92502-04:33 Riverside.CA 92507-0704 www.babcocklabs.com NELAP No.OR40:35 LACSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Excellence for Oaer l00 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 3 of 9 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 1916583-(2-11369) Santa Paula,CA 93060 Work Order Number: 69L1173 Report Date: 20-Dec-2019 Received on Ice(Y/N): Yes Temp: 4 °C Laboratory Reference Number B90173-01 Sample Description Matrix Sampled Datelfime Received Date/Time Centrifuge Cake Solid 12/03/19 00:00 12/06/19 10:10 Analyte(s) Result RDL Units Method Analysis Date Analyst Flag Organochlorine Pesticides and PCBs by EPA 8000 Series Surrogate:Decachlorobiphenyl 70.3 % 10-158 EPA 8082 12/13/19 23:54 JHR NV RLm mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 000 BABCOCK Laboratories, Inc. '1/11 SIambar(l q 1'u d/rn,r/ur 0", /0O Client Name: FGL Environmental, Inc. Analytical Report: Page 4 of 9 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 1916583-(2-11369) Santa Paula, CA 93060 Work Order Number: B9L1173 Report Date: 20-Dec-2019 Received on Ice(Y/N): Yes 'Kemp: 4 °C Organochlorine Pesticides and PCBs by EPA 8000 Series -Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 9L07059-EPA 3550E Blank(91-07059-131-K1) Prepared: 12/07/19 Analyzed: 12/16/19 4,4'-DDD ND 11 ug/kg wet 4,4'-DDE ND 8.0 ug/kg wet 4,4'-DDT ND 12 ug/kg wet a-BHC ND 10 ug/kg wet Aldrin ND 6.0 ug/kg wet b-BHC ND 10 ug/kg wet Chlordane ND 75 ug/kg wet d-BHC ND 20 ug/kg wet Dieldrn ND 8.0 ug/kg wet Endosulfan I ND 8.0 ug/kg wet Endosulfan II ND 12 ug/kg wet Endosulfan Sulfate ND 29 ug/kg wet Endrin ND 8.0 ug/kg wet Endrin Aldehyde ND 20 ug/kg wet Heptachlor ND 7.0 ug/kg wet Heptachlor Epoxide ND 8.0 ug/kg wet Hexachlorobenzene ND 100 ug/kg wet Lindane ND 13 ug/kg wet Methoxychlor ND 79 ug/kg wet Toxaphene ND 250 ug/kg wet Surrogate: 24 ug/kg wet 50.0 47.3 10-216 Decachlorobiphenyl LCS(9L07059-BS1) Prepared: 12/07/19 Analyzed: 12/16/19 4,4'-DDD 10.1 11 ug/kg wet 16.7 60.4 49-111 4,4'-DDE 9.96 8.0 ug/kg wet 16.7 59.8 47-106 4,4'-DDT 7.94 12 ug/kg wet 16.7 47.6 41-114 a-BHC 7.94 10 ug/kg wet 16.7 47.6 27-109 Aldrin 8.04 6.0 ug/kg wet 16.7 48.2 30-110 b-BHC 8.69 10 ug/kg wet 16.7 52.2 32-119 d-BHC 4.99 20 ug/kg wet 16.7 29.9 27-88 Dieldrin 9.45 8.0 ug/kg wet 16.7 56.7 46-106 Endosulfan 1 9.13 8.0 ug/kg wet 16.7 54.8 39-107 Endosulfan 11 8.31 12 ug/kg wet 16.7 49.8 35-115 Endosulfan Sulfate 7.87 29 ug/kg wet 16.7 47.2 32-112 Mailin, location P 951 65:3 3351 CA ELAP No.2698 P.O Box 4:32 6100 Quail Valley Court F 951 653 166'2 EPA No.CA00102 Riverside.CA9'250'2-01:32 Riverside.C-1 92507-0 7 04 www.babcocklabs.com NEL',P No.OR40:35 LACSD No. 10119 000 BABCOCK Laboratories, Inc. 0- , 00 Client Name: FGL Environmental, Inc. Analytical Report: Page 5 of 9 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 1916583-(2-11369) Santa Paula, CA 93060 Work Order Number: B9L1173 Report Date: 20-Dec-2019 Received on Ice(Y/N): Yes "Kemp: -1 °C Organochlorine Pesticides and PCBs by EPA 8000 Series -Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 9LO7059-EPA 3550E LCS(9L07059-BSI) Prepared: 12/07/19 Analyzed: 12/16/19 Endrin 10.6 8.0 ug/kg wet 16.7 63.5 46-118 Endrin Aldehyde 5.63 20 ug/kg wet 16.7 33.8 23-105 Heptachlor 8.08 7.0 ug/kg wet 16.7 48.5 22-125 Heptachlor Epoxide 8.87 8.0 ug/kg wet 16.7 53.2 40-108 Hexachlorobenzene 8.29 100 ug/kg wet 16.7 49.8 29-109 Lindane 8.03 13 ug/kg wet 16.7 48.2 27-112 Methoxychlor 36.7 79 ug/kg wet 66.7 55.1 45-123 Surrogate: 29 ug/kg wet 50.0 57.4 10-216 Decachlorobiphenyl LCS Dup(9L07059-BSD1) Prepared: 12/07/19 Analyzed: 12/16/19 4,4'-DDD 10.2 11 ug/kg wet 16.7 61.1 49-111 1.23 30 4,4'-DDE 9.99 8.0 ug/kg wet 16.7 59.9 47-106 0.292 30 4,4'-DDT 8.33 12 ug/kg wet 16.7 50.0 41-114 4.80 30 a-BHC 8.11 10 ug/kg wet 16.7 48.7 27-109 2.11 30 Aldrin 8.21 6.0 ug/kg wet 16.7 49.3 30-110 2.17 30 b-BHC 8.95 10 ug/kg wet 16.7 53.7 32-119 2.96 30 d-BHC 4.91 20 ug/kg wet 16.7 29.5 27-88 1.54 30 Dieldrin 9.55 8.0 ug/kg wet 16.7 57.3 46-106 1.08 30 Endosulfan 1 9.18 8.0 ug/kg wet 16.7 55.1 39-107 0.462 30 Endosulfan II 8.35 12 ug/kg wet 16.7 50.1 35-115 0.461 40 Endosulfan Sulfate 7.79 29 ug/kg wet 16.7 46.7 32-112 1.03 40 Endrin 11.0 8.0 ug/kg wet 16.7 66.1 46-118 4.10 30 Endrin Aldehyde 5.55 20 ug/kg wet 16.7 33.3 23-105 1.37 40 Heptachlor 8.05 7.0 ug/kg wet 16.7 48.3 22-125 0.399 30 Heptachlor Epoxide 8.95 8.0 ug/kg wet 16.7 53.7 40-108 0.916 30 Hexachlorobenzene 8.36 100 ug/kg wet 16.7 50.1 29-109 0.796 40 Lindane 8.18 13 ug/kg wet 16.7 49.1 27-112 1.82 30 Methoxychlor 37.5 79 ug/kg wet 66.7 56.2 45-123 2.06 20 Surrogate: 30 ug/kg wet 50.0 59.3 10-216 Decachlorobiphenyl mailin' &ration P 951 65:3 3351 CA ELAP No.2698 P.O Box 1:32 6100(wail Valley Court F 951 65:3 1662 EPA No.CA00102 Riverside-CA 92502-0-132 Riverside,CA 92-507-0704 www.babcocklabs.com NELAP No.OR40:35 L1CSD No. 10119 000 BABCOCK Laboratories, Inc. 0 , loli 1- Client Name: FGL Environmental, Inc. Analytical Report: Page 6 of 9 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 1916583-(2-11369) Santa Paula, CA 93060 Report Date: 20-Dec-2019 Work Order Number: B90173 Received on Ice(Y/N): Yes Temp: d °C' Organochlorine Pesticides and PCBs by EPA 8000 Series -Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 9L07059-EPA 3550B Matrix Spike(91-07059-MS1) Source:1391-1204-01 Prepared: 12/07/19 Analyzed: 12/16/19 Q_nes 4,4'-DDD 32.9 35 ug/kg dry 52.6 ND 62.5 14-149 4,4'-DDE 34.4 25 ug/kg dry 52.6 ND 65.4 10-140 4,4'-DDT 35.3 38 ug/kg dry 52.6 ND 67.1 10-138 NCALIm a-BHC 33.2 32 ug/kg dry 52.6 ND 63.0 27-99 Aldrin 34.5 19 ug/kg dry 52.6 ND 65.6 40-92 b-BHC 39.7 32 ug/kg dry 52.6 ND 75.5 15-130 NCALlm d-BHC 17.6 63 ug/kg dry 52.6 ND 33.5 10-98 Dielddn 34.0 25 ug/kg dry 52.6 ND 64.5 18-125 Endosulfan 1 35.2 25 ug/kg dry 52.6 ND 66.9 16-127 Endosulfan 11 33.6 38 ug/kg dry 52.6 ND 63.8 29-108 Endosulfan Sulfate 31.4 92 ug/kg dry 52.6 ND 59.7 19-121 NCALlm Endrin 48.1 25 ug/kg dry 52.6 ND 91.3 24-127 Endrin Aldehyde 27.6 63 ug/kg dry 52.6 ND 52.5 10-103 NCALlm Heptachlor 36.5 22 ug/kg dry 52.6 ND 69.4 10-125 NCALlm Heptachlor Epoxide 37.3 25 ug/kg dry 52.6 ND 70.8 46-101 Hexachlorobenzene 35.4 320 ug/kg dry 52.6 ND 67.2 29-115 Lindane 34.0 41 ug/kg dry 52.6 ND 64.7 20-108 NCALIm Methoxychlor 153 250 ug/kg dry 211 ND 72.8 10-157 NCALIm Surrogate: 100 ug/kg dry 158 63.8 10-216 Decachlorobiphenyl Batch 9LO9129-EPA 3550E Blank(91-09129-BLK1) Prepared: 12/09/19 Analyzed: 12/13/19 Aroclor 1016 ND 330 ug/kg wet Aroclor 1221 ND 330 ug/kg wet Aroclor 1232 ND 330 ug/kg wet Aroclor 1242 ND 330 ug/kg wet Aroclor 1248 ND 330 ug/kg wet Aroclor 1254 ND 330 ug/kg wet Aroclor 1260 ND 330 ug/kg wet Surrogate:2,4,5,6 35.3 ug/kg wet 50.0 70.5 10-134 Tetra chloro-m-x ylene Surrogate: 32.9 ug/kg wet 50.0 65.9 10-158 Decachlorobiphenyl mailing location P 951 65:3 3351 CA ELAP No.2698 P.O Box 4:32 6100 Quail Valley Court F 951 653 1662 EPA No.CA00t02 Riverside.CA 92503-0432 Riverside.CA 92507-0701 www.babcocklabs.coni NELAP No.OR40:35 L.-XCSD No. 10119 000 BABCOCK Laboratories, Inc. The Standard of Evicellence for Oder 1001ears Client Name: FGL Environmental, Inc. Analytical Report: Page 7 of 9 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 1916583-(2-11369) Santa Paula, CA 93060 Work Order Number: B9L1173 Report Date: 20-Dec-2019 Received on Ice(Y/N): Yes Temp: 4 °C Organochlorine Pesticides and PCBs by EPA 8000 Series-Batch Quality Control Spike Source %REC RPD Analyte(s) Result RDL Units Level Result %REC Limits RPD Limit Flag Batch 9L09129-EPA 3550E LCS(9L09129-BS1) Prepared:12/09/19 Analyzed: 12/13/19 Arodor 1016 489 330 ug/kg wet 667 73.3 47.8-122 Arodor 1260 548 330 ug/kg wet 667 82.3 48.3-127 Surrogate:2,4,5,E 39.1 ug/kg wet 50.0 78.1 10-134 Tetrachloro-m-xylene Surrogate: 38.4 ug/kg wet 50.0 76.7 10-158 Decachlorobiphenyl LCS Dup(9L09129-BSD1) Prepared: 12/09/19 Analyzed: 12/13/19 Arodor 1016 495 330 ug/kg wet 667 74.3 47.8-122 1.23 20 Arodor 1260 551 330 ug/kg wet 667 82.7 48.3-127 0.546 20 Surrogate:2,4,5,6 39.8 ug/kgwet 50.0 79.5 10-134 Tetrachloro-m-xylene Surrogate: 39.0 ug/kg wet 50.0 77.9 10-158 Decachlorobiphenyl Matrix Spike(91-09129-MS1) Source:1391-7204-01 Prepared:12/09/19 Analyzed: 12/13/19 Q_nes Arodor 1016 1530 1100 ug/kg dry 2110 ND 72.7 23-195 Arodor 1260 1810 1100 ug/kg dry 2110 ND 85.9 13.5-134 Surrogate:2,4,5,E 114 ug/kg dry 158 72.4 10-134 Tetrachloro-m-xylene Surrogate. 130 ug/kg dry 158 82.3 10-158 Decachlorobiphenyl mailing location P 951653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 000 BABCOCK Laboratories, Inc. The Skindard of Excellence for Over 100 Years Client Name: FGL Environmental, Inc. Analytical Report: Page 8 of 9 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 1916583-(2-11369) Santa Paula, CA 93060 Work Order Number: 69L1173 Report Date: 20-Dec-2019 Received on[cc(Y/N): Yes Temp: 4 °C Notes and Definitions N_RLm Due to sample matrix,the reporting limit has been raised. NCALlm Calibration Verification recovery was below the method control limits for this analyte due to matrix interference carried over from analytical samples. Q_nes Insufficient sample for the sample duplicate and/or MS/MSD analysis. ND: Analyte NOT DETECTED at or above the Method Detection Limit(if MDL is reported), otherwise at or above the Reportable Detection Limit(RDL) NR: Not Reported RDL: Reportable Detection Limit MDL: Method Detection Limit */(Non-NELAP): NELAP does not offer accreditation for this analyte/method/matrix combination Approval Enclosed are the analytical results for the submitted sample(s). Babcock Laboratories certify the data presented as part of this report meet the minimum quality standards in the referenced analytical methods.Any exceptions have been noted. Alexis Nicole Harold For Cindy A.Waddell cc: e-Standard_No Alias.rpt This report applies only to the sample(s)analyzed.As a mutual protection to clients,the public,and Babcock Laboratories,Inc.,this report is submitted and accepted for the exclusive use of the Client to whom it is addressed.Interpretation and use of the information contained within this report are the sole responsibility of the Client.Babcock Laboratories,Inc.is not responsible for any misinformation or consequences that may result from misinterpretation or improper use of this report.This report is not to be modified or abbreviated in any way. Additionally,this report is not to be used,in whole or in part,in any advertising or publicity matter without written authorization from Babcock Laboratories,Inc.The liability of Babcock Laboratodes,Inc.is limited to the actual cost of the requested analyses,unless otherwise agreed upon in writing.There is no other warranty expressed or implied. mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quail Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502-0432 Riverside,CA 92507.0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 000 BABCOCK Laboratories, Inc. The Skindard of Excellence ffrr Over 100 rears Client Name: FGL Environmental, Inc. Analytical Report: Page 9 of 9 Contact: Cindy Aguirre Project Name: No Project Address: 853 Corporation Street Project Number: SP 1916583-(2-11369) Santa Paula, CA 93060 Work Order Number: B91-1173 Report Date: 20-Dec-2019 Received on Ice(Y,'.V): Yes Temp: 4 0 C Subcontract to Babcock Laboratories, Inc. PR. Client: Fruil Grossers Laboratory,W. Address:FGL Environmental,Inc. 853 Corporanon 5t. :3 Santa Paula,CA 93060-3005 Y Iu Phone: Fax: 3 v Contacr Person: • r Protect Name: SP 1916583-(2-11369) a Purchase Order Nttmbcr. V anti : h � 3 g 'c 1ML I(o?. Sampler(s) OPSI DA = m r >, °C E z I o On Ice NO Sample IMaC YE)S NO Compositor Setup Dam:—I_I_ Time: Z A E Lab Number:Samp Loanon Descnpnon Dare Time Num Sampled $angled 5 Cenmfuge Cakc IV03119 00:00 C Slg I I BM173 Rc'd: 12/06/201910:10 i Isg Temp Gun Id:62 �■ Remarks: Relitg te: Time: Relinqwstted Dale: llrnc: Rchigmsned Du. iunc. Report N�,.l 0.5 .Note any detection of >0.2 IL ��V.Analyze and Field only if VOC n:d n S ;�O O samples. R m: June: Received BY: Dam: Trace: Received By: Date: Tim:. Use Cabt Slate Write-On form to rt Its of Potable'Water Wells l' /C/�j"/A/�,1� +1, mailing location P 951 653 3351 CA ELAP No.2698 P.O Box 432 6100 Quaff Valley Court F 951 653 1662 EPA No.CA00102 Riverside,CA 92502.0432 Riverside,CA 92507-0704 www.babcocklabs.com NELAP No.OR4035 LACSD No.10119 ENVIRONMENTAL�— Analytical Chemists January 13,2020 South Tahoe Public Utility District Lab ID : SP 1916583 1275 Meadow Crest Drive Customer 2-11369 South Lake Tahoe, CA 96150 Laboratory Report Introduction: This report package contains total of 41 pages divided into 3 sections: Case Narrative (3 pages) : An overview of the work performed at FGL. Sample Results (17 pages) : Results for each sample submitted. Quality Control (21 pages) : Supporting Quality Control (QC)results. Case Narrative This Case Narrative pertains to the following samples: Sample Description Date Date FGL Lab ID # Matrix Sampled Received WW-06 Ravi Grab 12/03/2019 12/05/2019 SP 1 9 1 65 83-00 1 WW-05 Final Grab 12/03/2019 12/05/2019 SP 1916583-002 WW WW-01 Raw Influent 12/03/2019 12/05/2019 SP 1916583-003 WW WW-04 Final Effluent 12/03/2019 12/05/2019 SP 1916583-004 WW Centrifuee Cake 12/03/2011) 1 1-'0�"12019 SP 1916583-005 1 SIg 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 3 '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 12/13/2019:214487 All preparation quality controls are within established criteria,except: I( The following note applies to Toluene-d8: 310 LCS above Acceptance Range(AR).Samples which were non detect for this analyte were accepted. 12/13/2019:214257 All preparation quality controls are within established criteria. 12/11/2019:219206 All analysis quality controls are within established criteria,except: 608/8081 The following note applies to Endrin,Methoxychlor,p,p-DDT: 360 CCV above Acceptance Range(AR). Samples which were non detect for this analyte were accepted. 12/09/2019:214038 All preparation quality controls are within established criteria,except: Page 1 of 41 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 January 13, 2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Organic QC The following note applies to Dieldrin,Endrin,Heptachlor, Methoxychlor, Beta BHC,Endosulfan Sulfate: 436 Blank Spike(BS)not within Acceptance Range(AR).Data was accepted based on the LCS or CCV recovery. The following note applies to Alpha BHC,Aldrin,Beta BHC,Delta BHC,Endosulfan Sulfate,Endrin 608/8081 Aldehyde,Endrin Ketone,Heptachlor,Heptachlor Epoxi: 410 Relative Percent Difference(RPD)not within Maximum Allowable Value(MAV).Data was accepted based on the LCS or CCV recovery. The following note applies to Dieldrin,Heptachlor: 320 LCS not within Acceptance Range(AR).Data was accepted based on the BSBSD recovery. 12/16/2019:219544 All analysis quality controls are within established criteria,except: 625 The following note applies to 2,6-Dinitrotoluene,3,3-Dichlorobenzidine: 360 CCV above Acceptance Range(AR). Samples which were non detect for this analyte were accepted. 12/10/2019:214089 All preparation quality controls are within established criteria,except: The following note applies to Butylbenzylphthalate,Benzidine,Di-n-butylphthalate: 310 LCS above Acceptance Range(AR).Samples which were non detect for this analyte were accepted. The following note applies to 2-Fluorophenol: 320 LCS not within Acceptance Range(AR).Data was accepted based on the BSBSD recovery. The following note applies to 1,2,4-Trichlorobenzene, 1,2-Dichlorobenzene, 1,3-Dichlorobenzene, 1,4- Dichlorobenzene,2-Fluorophenol,2,4,5-Trichloroph: 435 Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. The following note applies to 1,2,4-Trichlorobenzene, 1,2-Dichlorobenzene, 1,3-Dichlorobenzene, 1,4- Dichlorobenzene,2-Fluorobiphenyl,2-Fluorophenol,: 435 Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. 12/13/2019:219578 All analysis quality controls are within established criteria,except: The following note applies to Acrolein,Acrylonitrile,Dichlorodifluoromethane,Isopropyl Ether,Methyl tert-Butyl Ether,Naphthalene,tert-Butanol: r l3 360 CCV above Acceptance Range(AR).Samples which were non detect for this analyte were accepted. The following note applies to Acrolein,Acrylonitrile,Dichlorodifluoromethane,Isopropyl Ether,Methyl tert-Butyl Ether,Naphthalene: 380 CCV met CCC and SPCC criteria,Results were reported 12/20/2019:219722 All analysis quality controls are within established criteria. 12/18/2019:219663 All analysis quality controls are within established criteria,except: The following note applies to Benzylalcohol,3,3-Dichlorobenzidine: 8270C 360 CCV above Acceptance Range(AR).Samples which were non detect for this analyte were accepted. The following note applies to Benzylalcohol: 380 CCV met CCC and SPCC criteria,Results were reported. 12/16/2019:214374 All preparation quality controls are within established criteria. Page 2 of 41 January 13, 2020 Lab ID : SP 1916583 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:DMB Digila➢y siV d by David I—B A..MRA Approved By David Terz,B.A.,M.B.A. ®Uk,QA 111 WIC±lnoau-u Page 3 of 41 G LNVIRONMENTAL AGRICULTURAL Analytical Chemists January 13,2020 Lab ID : SP 1916583-001 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : December 3, 2019-11:17 South Lake Tahoe, CA 96150 Sampled By : OPS/LDA/ML Received On : December 5,2019-12:00 Matrix : Waste Water Description : WW-06 Raw Grab Project : EPA Priority Pollutants AG69833 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 4-Bromofluorobenzenet 100 78-123 % 5030B 12113/19:214487 8260B 12113/19:21957� Dibromofluoromethanet 109 65-125 % 5030B 12/13/19:214487 8260B 12113/19:219578 1,2-Dichloroethane-d4' 114 58-144 % 5030B 12113/19:214487 8260E 12/13/19:219578 Toluene-d8� 108 92-107 % 5030B 12/13119:214487 8260E 12/13/19:219578 Acetone 80 50 ug/L 5030E 12/13/19:214487 8260E 12/13/19:219578 Acrolein ND 50 ug/L 5030B 12/13/19:214487 8260E 12/13/19:219578 Acrylonitrile ND 50 ug/L 5030B 12113/19:214487 8260E 12/13/19:219578 Benzene ND 0.5 ug/L 5030E 12/13/19:214487 8260E 12/13/19:219578 Bromobenzene ND 0.5 ug/L 5030B 12/13/19:214487 8260E 12/13/19:219578 Bromochloromethane ND 0.5 ug/L 5030E 12/13/19:214487 8260E 12/13/19:219578 Bromodichloromethane ND 0.5 ug/L 5030E 12/13/19:214487 8260B 12/13/19:219578 Bromoform ND 2 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Bromomethane ND 0.5 ug/L 5030E 12/13/19:214487 8260B 12/13/19:219578 tert-Butanol ND 5 ug/L 5030E 12/13/19:214487 8260B 12/13/19:219578 2-Butanone(MEK) ND 10 ug/L 5030E 12/13/19:214487 8260B 12/13/19:219578 n-Butylbenzene ND 0.5 ug/L 5030E 12/13/19:214487 8260E 12/13/19:219578 sec-Butylbenzene ND 0.5 ug/L 5030B 12/13/19:214487 8260E 12/13/19:219578 tert-Butylbenzene ND 0.5 ug/L 5030E 12/13/19:214487 8260B 12/13/19:219578 Carbon Disulfide ND 10 ug/L 5030E 12/13/19:214487 8260E 12/13/19:219578 Carbon Tetrachloride ND 1 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Chlorobenzene ND 0.5 ug/L 5030E 12/13/19:214487 8260E 12/13/19:219578 Chloroethane ND 1 ug/L 5030E 12/13/19:214487 8260E 12113/19:219578 Chloroform ND I ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Chloromethane ND 0.5 ug/L 5030B 12/13/19:214487 8260E 12/13/19:219578 2-Chlorotoluene ND 0.5 ug/L 5030B 12/13/19:214487 8260E 12/13/19:219578 4-Chlorotoluene ND 0.5 ug/L 5030E 12/13/19:214487 8260E 12/13/19:219578 Dibromochloromethane ND 2 ug/L 5030E 12/13/19:214487 8260E 12/13/19:219579 Dibromomethane ND 0.5 ug/L 5030E 12/13/19:214487 8260E 12/13119:21957S 1,2-Dichlorobenzene ND 0.5 ug/L 5030E 12113/19:214487 8260E 12/13/19:219579 1,3-Dichlorobenzene ND 0.5 ug/L 5030E 12/13/19:214487 8260E 12/13/19:219578 1,4-Dichlorobenzene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Dichlorodifluoromethane ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 1,1-Dichloroethane ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12113/19:219578 1,2-Dichloroethane ND 0.5 ug/L 5030E 12/13/19:214487 8260B 12/13/19:219578 I,I-Dlchloroeth lene ND 0.5 U L 5030B 12/13/19:214487 8260B 12/13/19:219578 Page 4 of 41 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Ofiic&&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 January 13,2020 Lab ID : SP 1916583-001 Description : WW-06 Raw 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 12/13/19:214487 8260B 12/13/19:219578 trans-1,2-Dichloroethylene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 1,2-Dichloropropane ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 1,3-Dichloropropane ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 2,2-Dichloropropane ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 1,1-Dichloropropene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 1,3-Dichloropropene(Total) ND -- ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 cis-1,3-Dichloropropene ND 0.5 ug/L 5030B 12113119:214487 8260B 12/13/19:219578 trans-1,3-Dichloropropene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Di-isopropyl ether(DIPE) ND 5 ug/L 5030B 12/13/19:214487 8260B 12113/19:219578 Ethyl Benzene ND 0.5 ug/L 5030B 12/13/19:214487 s260B 12/13/19:219578 Ethyl tert-butyl ether (ETBE) ND 2 ug/L 5030B 12/13/19:214487 8260E 12/13/19:219578 Hexachlorobutadiene ND 5 ug/L 5030B 12/13/19:214487 8260E 12/13/19:219578 2-Hexanone ND 10 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Isopropylbenzene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 p-Isopropyltoluene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219579 Methyl tert-butyl ether (MTBE) ND 2Ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 4-Methyl-2-pentanone ND 10 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 (MIBK) Methylene Chloride ND 5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Naphthalene ND 5 ug/L 5030B 12/13/19:214487 8260B 12/I3/19219578 n-Propylbenzene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Styrene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 tert-Amyl methyl ether (TAME) ND 5 ug/L 5030B 12/13l19:214487 8260E 12/13/19:219578 1,1,1,2-Tetrachloroethane ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 1,1,2,2-Tetrachloroethane ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Tetrachloroethylene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Toluene 2.6 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 1,2,3-Trichlorobenzene ND 5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 1,2,4-Trichlorobenzene ND 5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:21957S 1,1,1-Trichloroethane ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 1,1,2-Trichloroethane ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Trichloroethylene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Trichlorofluoromethane ND I ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 1,2,4-Trimethylbenzene ND 0.5 ug/L 5030E 12113/19:214487 8260B 12/13/19:219578 1,3,5-Trimethylbenzene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Vinyl Acetate ND 10 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Vinyl Chloride ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219579 X lens ND -- ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Page 5 of 41 January 13,2020 Lab ID : SP 1916583-001 Description : WW-06 Raw Grab Customer ID 2-11369 Sample Result- Organic Constituent Result I PQL Units Note I Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 Xylenes m,p ND 2 ug/L 5030E 12/13/19:214487 8260E 12/13/19:21957�, X lens o ND 2 u L 5030B 12/13/19:214487 1 8260B 12/13/19:21957� ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.•PQL adjusted for dilution. Page 6 of 41 - L ENVIRONMENTAL Analytical Chemists January 13,2020 Lab ID : SP 1916583-002 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : December 3, 2019-10:48 South Lake Tahoe,CA 96150 Sampled By : OPS/LDA/ML Received On : December 5, 2019-12:00 Matrix : Waste Water Description : WW-05 Final Grab Project : EPA Priority Pollutants AG69832 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 4-Bromofluorobenzenet 98.6 78-123 % 5030B 12/13/19:214487 8260B 12/13/19:21957b Dibromofluoromethane$ 108 65-125 % 5030B 12/13/19:214487 8260E 12/13/19:21957x 1,2-Dichloroethane-d4$ 113 58-144 % 5030B 12/13/19:214487 8260E 12/13/19:21957� Toluene-d8$ 107 92-107 % 5030B 12/13/19:214487 8260E 12/13/19:21957.� Acetone ND 50 ug/L 5030B 12/13/19:214487 8260B 12/13/19:21957,� Acrolein ND 50 ug/L 5030B 12/13/19:214487 8260B 12/13/19:21957x Acrylonitrile ND 50 ug/L 5030E 12/13/19:214487 8260E 12/13/19:21957x Benzene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:21957K Bromobenzene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Bromochloromethane ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Bromodichloromethane ND 0.5 ug/L 5030B 12/13/19:214487 8260E 12/13/19:219578 Bromoform ND 2 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Bromomethane ND 0.5 ug/L 5030E 12/13/19:214487 8260B 12/13/19:21957K tert-Butanol ND 5 ug/L 5030E 12/13/19:214487 8260B 12/13/19:21957K 2-Butanone(MEK) ND 10 ug/L 5030B 12/13/19:214487 8260B 12/13/19:21957K n-Butylbenzene ND 0.5 ug/L 5030B 12/13/19:214487 8260E 12/13/19:21957x sec-Butylbenzene ND 0.5 ug/L 5030E 12/13/19:214487 8260E 12/13/19:21957K tert-Butylbenzene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Carbon Disulfide ND 10 ug/L 5030E 12/13/19:214487 8260E 12/13/19:21957X Carbon Tetrachloride ND I ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Chlorobenzene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:21957X Chloroethane ND I ug/L 5030E 12113/19:214487 8260B 12/13/19:21957x Chloroform ND I ug/L 5030B 12/13/19:214487 8260B 12/13/19:21957K Chloromethane ND 0.5 ug/L 5030E 12/13/19:214487 8260B 12/13/19:21957s 2-Chlorotoluene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:21957x 4-Chlorotoluene ND 0.5 ug/L 5030B 12/13/19:214487 8260E 12/13/19:21957K Dibromochloromethane ND 2 ug/L 5030B 12/13/19:214487 8260E 12/13/19:21957x Dibromomethane ND 0.5 ug/L 5030E 12/13/19:214487 8260E 12/13/19:219571,' 1,2-Dichlorobenzene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:21957K 1,3-Dichlorobenzene ND 0.5 ug/L 5030B 12/13/19:214487 8260E 12/13/19:21957K 1,4-Dichlorobenzene ND 0.5 ug/L 5030E 12/13/19:214487 8260B 12/13/19:21957K Dichlorodifluoromethane ND 0.5 ug/L 5030B 12/13/19:214487 8260E 12/13/19:219578 I,1-Dichloroethane ND 0.5 ug/L 5030E 12/13/19:214487 8260B 12/13/19:21957x 1,2-Dichloroethane ND 0.5 ug/L 5030B 12/13/19:214487 8260E 12/13/19:219578 1,1-Dichloroeth lene ND 0.5 IL 5030B 12/13/19:214487 1 8260E 12/13/19:219578 Page 7 of 41 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 January 13, 2020 Lab ID : SP 1916583-002 Description : WW-05 Final Grab Customer ID 2-11369 Sample Result- Organic Constituent Result PQL knits Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8260 cis-1,2-Dichloroethylene ND 0.5 ug/L 5030B 12/13/19:214487 X260B 12/13/19:219578 trans-1,2-Dichloroethylene ND 0.5 ug/L 5030B 12/13/19:214487 8260E 12/13/19:219578 1,2-Dichloropropane ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 1,3-Dichloropropane ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 2,2-Dichloropropane ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 1,1-Dichloropropene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 1,3-Dichloropropene(Total) ND -- ug/L 5030B 12/13119:214487 8260B 12/13/19:219578 cis-1,3-Dichloropropene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 trans-1,3-Dichloropropene ND 0.5 ug/L 5030B 12/13/19:214487 s260B 12/13/19:219578 Di-isopropyl ether(DIPE) ND 5 ug/L 5030B 12/13/19:214487 s260B 12/13/19:219578 Ethyl Benzene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12113/19:21957S Ethyl tert-butyl ether (ETBE) ND 2 ug/L 5030B 12/13/19:214457 8260B 12/13/19:219578 Hexachlorobutadiene ND 5 ug/L 5030B 12/13/19:214487 8260E 12/13/19:219578 2-Hexanone ND 10 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Isopropylbenzene ND 0.5 ug/L 5030E 12/13/19:214487 8260B 12/13/19:219578 p-Isopropyltoluene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Methyl tert-butyl ether (MTBE) ND 2 ug/L 5030B 12/13/19:214487 82608 12/13/19:219578 4-Methyl-2-pentanone ND 10 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 (MIBK) Methylene Chloride ND 5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Naphthalene ND 5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 n-Propylbenzene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Styrene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 tert-Amyl methyl ether (TAME) ND 5 ug/L 5030B 12/13/19:214487 8260E 12/13/19:219578 1,1,1,2-Tetrachloroethane ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 1,1,2,2-Tetrachloroethane ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Tetrachioroethylene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Toluene 1.0 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 1,2,3-Trichlorobenzene ND 5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 1,2,4-Trichlorobenzene ND 5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 1,1,1-Trichloroethane ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 1,1,2-Trichloroethane ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:21957S Trichloroethylene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219579 Trichlorofluoromethane ND 1 ug/L 5030B 12/13/19:214487 8260E 12/13/19:219579 1,2,4-Trimethylbenzene ND 0.5 ug/L 5030B 12/13/19:214487 8260E 12/13/19:21957K 1,3,5-Tnmethylbenzene ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219579 Vinyl Acetate ND 10 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219578 Vinyl Chloride ND 0.5 ug/L 5030B 12/13/19:214487 8260B 12/13/19:219579 X lens ND -- u L 5030E 12/13/19:214487 8260B 12/13/19:219578 Page 8 of 41 January 13,2020 Lab ID : SP 1916583-002 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 12/13/19:214487 8260E 12/13/19:219578 Xylenes o ND 2 U L 5030B 12/13/19:214487 8260B 12/13/19:219578 ND Non-Dctcctcd.PQL-Practical Quantitation Limit.+Surrogatc.'PQL adjustcd for dilution. Page 9 of 41 NM ENVIRONMENTAL AGRICULTURAL Analytical Chemists January 13, 2020 Lab ID : SP 1916583-003 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : December 3,2019-00:00 South Lake Tahoe, CA 96150 Sampled By : OPS/LDA/ML Received On : December 5, 2019-12:00 Matrix : Waste Water Description : WW-01 Raw Influent Project : EPA Priority Pollutants AG69850 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 608 Tetrachloro-m-x lent 6.5 15-143 % 008/8081 12/09/19:214038 608/8081 12/11/19:219206 Aldrin ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Alpha BHC ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Beta BHC ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Delta BHC ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Gamma BHC(Lindane) ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Chlordane ND 0.1 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 4,4-DDD ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 4,4-DDE ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 4,4-DDT ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Dieldrin ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Endosulfan I ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Endosulfan II ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Endosulfan Sulfate ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Endrin ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Endrin Aldehyde ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Heptachlor ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Heptachlor Epoxide ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Methoxychlor ND 0.1 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Toxaphene ND 0.5 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 PCB,Sum ND -- ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 PCB 1016 ND 0.5 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 PCB 1221 ND 0.5 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 PCB 1232 ND 0.5 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 PCB 1242 ND 0.5 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 PCB 1248 ND 0.5 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219200 PCB 1254 ND 0.5 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 PCB 1260 ND 0.5 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 EPA 625 2-Fluorobiphenyl# 12.1 23-97 % 625 12/10119:214089 625 12/16/19:219544 2-Fluorophenol$ 0.2 7-111 % 625 12/10/19:214089 625 12/16/19:219544 Nitrobenzene-d5# 15.6 24-98 % 625 12/10/19:214089 625 12/16/19:219544 Phenol-d6$ 2.1 10-120 % 625 12/10/19:214089 625 12/16/19:219544 p-Terphenyl-dW 6.2 20-103 % 625 12/10/19:214089 625 12/16/19:219544 2,4,6-Tribromo henolx 1 8.0 1 38-109 1 % 625 12/10/19:214089 1 625 12/16/19:219544 Page 10 of 41 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 January 13,2020 Lab ID : SP 1916583-003 Description : WW-01 Raw Influent Customer ID 2-11369 Sample Result-Organic Constituent7 Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 625 Acenaphthene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Acenaphthylene ND l ug/L 625 12/10/19:214089 625 12/16/19:219544 Anthracene ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 Benzidine ND 2 ug/L 625 12/10/19:214089 625 12/16/19:219544 Benzo(a)anthracene ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 Benzo(a)pyrene ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 Benzo(b)fluoranthene ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 Benzo(g,h,i)perylene ND t ug/L 625 12/10/19:214089 625 12/16/19:219544 Benzo(k)fluoranthene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 bls(2- ND I ug/L 625 12110/19:214089 625 12/16119:219544 Chloroethoxy)methane bis(2-Chloroethyl)ether ND 1 ug/L 625 12/10/19:214089 625 12/16119:219544 bis(2-Chloroisopropyl)ether ND I ug/L 625 12/10/19:214089 625 12/16119:219544 bis(2-Ethylhexyl)phthalate ND 2 ug/L 625 12/10/19:214089 625 12/16119:219544 4-Bromophenylphenylether ND 1 ug/L 625 12/10/19:214089 625 12/16119:219544 Butylbenzylphthalate ND 2 ug/L 625 12/10/19:214089 625 12/16/19:219544 Chlorinated Phenolics ND -- ug/L 625 12/10/19:214089 625 12/16/19:219544 4-Chloro-3-methylphenol ND 1 ug/L 625 12/10/19:214089 625 12/16119:219544 2-Chloronaphthalene ND I ug/L 625 12/10/19:214089 625 12/16119:219544 2-Chlorophenol ND ug/L 625 12/10/19:214089 625 12/16/19:219544 4-Chlorophenylphenylether ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Chrysene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Dibenzo(a,h)anthracene ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 1,2-Dlchlorobenzene ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 1,3-Dichlorobenzene ND I ug/L 625 12/10/19:214089 625 12/16119:219544 1,4-Dichlorobenzene ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 3,3'-Dichlorobenzidine ND ug/L 625 12/10/19:214089 625 12/1&19:219544 2,4-Dichlorophenol ND ug/L 625 12/10/19:214089 625 12/16119:219544 Diethylphthalate ND ug/L 625 12/10/19:214089 625 12/16/19:219544 2,4-Dimethylphenol ND 2 ug/L 625 12/10/19:214089 625 12/16/19:219544 Dimethylphthalate ND 1 ug/L 625 12/10/19:214089 625 12/16119:219544 Di-n-butylphthalate ND 2 ug/L 625 12/10/19:214089 625 12/16119:219544 4,6-Dinitro-2- ND 2 ug/L 625 12/10/19:214089 625 12/16/19:219544 methylphenol 2,4-Dinitrophenol ND 5 ug/L 625 12/10/19:214089 625 12/16119:219544 2,4-Dinitrotoluene ND I ug/L 625 12/10/19:214089 625 12/16119:219544 2,6-Dinitrotoluene ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 Di-n-octylphthalate ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 1,2-Diphenylhydrazine ND I ug/L 625 12/10/19:214089 625 12/16119:219544 FIuoranthene ND I u L 625 12 10 19:214089 625 12!1619:219544 Pa>ie I I of 41 January 13, 2020 Lab ID : SP 1916583-003 Description : WW-01 Raw Influent Customer ID 2-11369 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 625 Fluorene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Hexachlorobenzene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:21954, Hexachlorobutadiene ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 Hexachlorocyclopentadiene ND 1 ug/L 625 12/10/19:214089 625 12/16119:219544 Hexachloroethane ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 Indeno(1,2,3-c,d)pyrene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Isophorone ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Naphthalene ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 Nitrobenzene ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 2-Nitrophenol ND 2 ug/L 625 12/10/19:214089 625 12/16/19:219544 4-Nitrophenol ND 2 ug/L 625 12/10/19:214089 625 12/16/19:219544 N-Nitrosodimethylamine ND 2 ug/L 625 12/10/19:214089 625 12/16/19:219544 N-Nitrosodi-n-propylamine ND 1 ug/L 625 12/10/19:214089 625 12/16119:219544 N-Nitrosodiphenylamine ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 Non-Chlorinated Phenolics ND -- ug/L 625 12/10/19:214089 625 12/16/19:219544 PAH,sum ND ug/L 625 12/10/19:214089 625 12/16/19:219544 Pentachlorophenol ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Phenanthrene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Phenol 1 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Pyrene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Pyridine 2 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 1,2,4-Trichlorobenzene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 2,4,6-Trichlorophenol ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 2,4,5-Trichloro henol ND 2 ug/L 625 12/10/19:214089 625 12/16/19:219544 ND=Non-Detected.PQL=Practical Quantitation Limit.;Surrogate.*PQL adjusted for dilution. Page 12 of 41 Q ENVIRONMENTAL Analytical Chemists January 13, 2020 Lab ID : SP 1916583-004 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : December 3,2019-00:00 South Lake Tahoe, CA 96150 Sampled By : OPS/LDA/ML Received On : December 5,2019-12:00 Matrix : Waste Water Description : WW-04 Final Effluent Project : EPA Priority Pollutants AG69853 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 608 Tetrachloro-m-x lent 37.6 15-143 % 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Aldrin ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Alpha BHC ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Beta BHC ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/I l/,9:219206 Delta BHC ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Gamma BHC(Lindane) ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Chlordane ND 0.1 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 4,4-DDD ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 4,4-DDE ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 4,4-DDT ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Dieldrin ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Endosulfan I ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Endosulfan II ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Endosulfan Sulfate ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/I1/19:219206 Endrin ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Endrin Aldehyde ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Heptachlor ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Heptachlor Epoxide ND 0.05 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 Methoxychlor ND 0.1 ug/L 608/8081 12109/19:214038 608/8081 12/11/19:219206 Toxaphene ND 0.5 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 PCB,Sum ND -- ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 PCB 1016 ND 0.5 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 PCB 1221 ND 0.5 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 PCB 1232 ND 0.5 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 PCB 1242 ND 0.5 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 PCB 1248 ND 0.5 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 PCB 1254 ND 0.5 ug/L 608/8081 12/09/19:214038 608/8081 12/11/19:219206 PCB 1260 ND 0.5 ugJL 608/8081 12/09/19:214038 608/8081 12/11/19:219206 EPA 625 2-Fluorobiphenyl* 76.5 23-97 % 625 12/10/19:214089 625 12/16/19:219544 2-Fluorophenol$ 21.2 7-111 % 625 12/10/19:214089 625 12/16/19:219544 Nitrobenzene-d5t 78.6 24-98 % 625 12/10/19:214089 625 12/16/19:219544 Phenol-d6x 41.6 10-120 % 625 12/10/19:214089 625 12/16/19:219544 p-Terphenyl-dl4$ 34.0 20-103 % 625 12/10/19:214089 625 12/16/19:219544 2,4,6-Tribromo henolx 1 51.6 1 38-109 1 % 1 1 625 12/10/19:214089 1 625 12/16/19:219544 Page 13 of 41 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 January 13,2020 Lab ID : SP 1916583-004 Description : WW-04 Final Effluent Customer ID 2-11369 Sample Result-Organic Constituent Krult PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/113 EPA 625 Acenaphthene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Acenaphthylene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Anthracene ND l ug/L 625 12/10/19:214089 625 12/16/19:219544 Benzidine ND 2 ug/L 625 12/10/19:214089 625 12/16/19:219544 Benzo(a)anthracene ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 Benzo(a)pyrene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Benzo(b)fluoranthene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Benzo(g,h,i)perylene ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 Benzo(k)fluoranthene ND I ug/L 625 12n0/19:214089 625 12/16119:219544 bis(2- Chloroethoxy)methane ND 1 ug/L 625 12/10119:214089 625 12/16/19:219544 bis(2-Chloroethyl)ether ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 bis(2-Chloroisopropyl)ether ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 bis(2-Ethylhexyl)phthalate ND 2 ug/L 625 12/10119:214089 625 12/16/19:219544 4-Bromophenylphenylether ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Butylbenzylphthalate ND 2 ug/L 625 12/10/19:214089 625 12/16/19:219544 Chlorinated Phenolics ND -- ug/L 625 12/10/19:214089 625 12/16/19:219544 4-Chloro-3-methylphenol ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 2-Chloronaphthalene ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 2-Chlorophenol ND 2 ug/L 625 12/10/19:214089 625 12/16/19:219544 4-Chlorophenylphenylether ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 Chrysene ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 Dibenzo(a,h)anthracene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 1,2-Dichlorobenzene ND I ug/L 625 12/10/19:214089 625 12/16119:219544 1,3-Dichlorobenzene ND 1 ug/L 625 12/10119:214089 625 12/16/19:219544 1,4-Dichlorobenzene ND I ug/L 625 12/10/19:214089 625 12/16119:219544 3,3'-Dichlorobenzidine ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 2,4-Dichlorophenol ND 2 ug/L 625 12/10/19:214089 625 12/16/19:219544 Diethylphthalate ND 1 ug/L 625 12/10/19:214089 625 12/16119:219544 2,4-Dimethylphenol ND 2 ug/L 625 12/10/19:214089 625 12/16/19:219544 Dimethylphthalate ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Di-n-butylphthalate ND 2 ug/L 625 12/10/19:214089 625 12/16/19:219544 4, po ND methylhylphenol ug/L 625 12/10/19:214089 625 12/16/19:219544 2,4-Dinitrophenol ND 5 ug/L 625 12/10/19:214089 625 12/16/19:219544 2,4-Dinitrotoluene ND I ug/L 625 12110119:214089 625 12/16119:219544 2,6-Dinitrotoluene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Di-n-octylphthalate ND I ug/L 625 12n0/19:214089 625 12/16/19:219544 1,2-Diphenylhydrazine ND 1 ug/L 625 12/10/19:214089 625 12/16119:219544 Fluoranthene ND I U L 1 1 5'-5 1 1 10%19:214089 625 12/16/19:219544 Page 14 of 41 January 13, 2020 Lab ID : SP 1916583-004 Description : WW-04 Final Effluent Customer ID 2-11369 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 625 Fluorene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Hexachlorobenzene ND 1 ug/L 625 12/10/19:214089 625 12/16/t9:219544 Hexachlorobutadiene ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 Hexachlorocyclopentadiene ND 1 ug/L 625 12/10/19:214089 625 12/16119:219544 Hexachloroethane ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Indeno(1,2,3-c,d)pyrene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Isophorone ND I ug/L 625 12/10/19:214089 625 12/16119:219544 Naphthalene ND 1 ug/L 625 12/10/19:214089 625 12/16119:219544 Nitrobenzene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 2-Nitrophenol ND 2 ug/L 625 12/10/19:214089 625 12/16119:219544 4-Nitrophenol ND 2 ug/L 625 12/10/19:214089 625 12/16/19:219544 N-Nitrosodimethylamine ND 2 ug/L 625 12/10/19:214089 625 12/16/19:219544 N-Nitrosodi-n-propylamine ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 N-Nitrosodiphenylamine ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Non-Chlorinated Phenolics ND -- ug/L 625 12/10/19:214089 625 12/16/19:219544 PAH,sum ND -- ug/L 625 12/10/19:214089 625 12/16/19:219544 Pentachlorophenol ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Phenanthrene ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Phenol ND 1 ug/L 625 12/10/19:214089 625 12/16/19:219544 Pyrene ND I ug/L 625 12/10/19:214089 625 12/16/19:219544 Pyridine ND I ug/L 625 12/10/19:214089 625 12/16119:219544 1,2,4-Trichlorobenzene ND 1 ug/L 625 12110/19:214089 625 12/16119:219544 2,4,6-Trichlorophenol ND 1 ug/L 625 12/10/19:214089 625 12/16119:219544 2,4,5-Trichloro henol ND 2 ug/L 625 12/10/19:214089 625 12/16/19:219544 ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.*PQL adjusted for dilution. Page 15 of 41 ENVIRONMENTALFrit AGRICULTURAL Analytical Chemists January 13,2020 Lab ID : SP 1916583-005 Customer ID : 2-11369 South Tahoe Public Utility District 1275 Meadow Crest Drive Sampled On : December 3,2019-00:00 South Lake Tahoe,CA 96150 Sampled By : OPS/LDA/ML Received On : December 5,2019-12:00 Matrix : Sludge Description : Centrifuge Cake Project : EPA Priority Pollutants AG69847 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/lD Method Date/lD EPA 8260 4-Bromofluorobenzenex 101 69-130* % 5030B 12/13/19:214257 8260B 12/13/19:21957S Dibromofluoromethane$ 98.8 50-162* % 5030B 12/13/19:214257 8260B 12/13/19:21957S 1,2-Dichloroethane-d4$ 103 59-166* % 5030B 12/13/19:214257 8260E 12/13/19:21957s Toluene-d8x 102 66-143* % 5030B 12/13/19:214257 8260B 12/13/19:21957s Acetone 333000 49000* ug/kg 5030B 12/13/19:214257 8260B 12/20/19:21972' Acrolein ND 1500* ug/kg 5030E 12113/19:214257 8260E 12/13/19:21957h Acrylonitrile ND 1500* ug/kg 5030B 12/13/19:214257 8260B 12/13/19:21957x Benzene ND 240* ug/kg 5030E 12/13/19:214257 8260E 12/13/19:219578 Bromobenzene ND 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:219578 Bromochloromethane ND 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:219578 Bromodichloromethane ND 240* ug/kg 5030E 12113/19:214257 8260B 12/13/19:21957h Bromoform ND 240* ug/kg 5030B 12/13/19:214257 8260E 12/13/19:21957ti Bromomethane ND 240* ug/kg 5030B 12/13/19:214257 8260B 12/13/19:2195T� tort-Butanol ND 1200* ug/kg 5030B 12/13/19:214257 8260E 12/13/19:21957� 2-Butanone(MEK) 115000 49000* ug/kg 5030B 12/13/19:214257 8260B 12/20/19:21972- n-Butylbenzene ND 240* ug/kg 5030B 12/13/19:214257 8260E 12/13/19:21957f sec-Butylbenzene ND 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:21957n tert-Butylbenzene ND 240* ug/kg 5030E 12/13/19:214257 8260B 1 2/13/19:21957h Carbon Disulfide ND 1200* ug/kg 5030B 12/13/19:214257 8260B 12/13/19:21957h Carbon Tetrachloride ND 240* ug/kg 5030B 12/13/19:214257 8260B 12/13/19:219578 Chlorobenzene ND 240* ug/kg 5030E 12/13/19:214257 82608 12/13/19:219578 Chloroethane ND 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:219578 Chloroform ND 240* ug/kg 5030B 12/13/19:214257 8260B 12/13/19:21957h Chloromethane ND 240* ug/kg 5030B 12/13/19:214257 8260E 12/13/19:21957ti 2-Chlorotoluene ND 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:21957h 4-Chlorotoluene ND 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:219578 Dibromochloromethane ND 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:219579 Dibromomethane ND 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:21957, 1,2-Dichlorobenzene ND 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:21957a 1,3-Dichlorobenzene ND 240* ug/kg 5030B 12/13/19:214257 8260E 12/13/19:21957N 1,4-Dichlorobenzene ND 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:21957n Dichlorodifluoromethane ND 240* ug/kg 5030B 12/13/19:214257 8260E 12/13/19:219578 1,1-Dichloroethane ND 240* ug/kg 5030E 12113/19:214257 8260B 12/13/19:21957s 1,2-Dichloroethane ND 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:21957x 1,1-Dichloroeth lene ND 240* u kg 5030E 12/13/19:214257 8260E 121/13/19:21957� Page 16 of 41 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 January 13,2020 Lab ID : SP 1916583-005 Description : Centrifuge Cake 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 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:219578 trans-1,2-Dichloroethylene ND 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:219578 1,2-Dichloropropane ND 240* ug/kg 5030E 12/13/19:214257 8260E 12/13/19:219578 1,3-Dichloropropane ND 240* ug/kg 5030B 12/13/19:214257 8260E 12/13/19:219578 2,2-Dichloropropane ND 240* ug/kg 5030B 12/13/19:214257 8260E 12/13/19:219578 1,1-Dichloropropene ND 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:219578 1,3-Dichloropropene(Total) ND -- ug/kg 5030E 12/13/19:214257 8260E 12/13/19:219578 cis-1,3-Dichloropropene ND 240* ug/kg 5030B 12/13/19:214257 8260B 12/13119:219578 trans-1,3-Dichloropropene ND 240* ug/kg 5030B 12113/19:214257 8260E 12/13/19:219578 Di-isopropyl ether(DIPE) ND 240* ug/kg 5030B 12/13/19:214257 8260E 12/13/19:219578 Ethyl Benzene ND 240* ug/kg 5030B 12/13/19:214257 8260E 12/13119:219578 Ethyl tert-butyl ether ND 240* ug/kg 5030B 12/13/19:214257 8260B 12/13119:219578 (ETBE) Hexachlorobutadiene ND 240* ug/kg 5030B 12/13/19:214257 8260E 12/13/19:219578 2-Hexanone ND 1200* ug/kg 5030B 12/13/19:214257 8260B 12/13/19:219578 Isopropylbenzene ND 240* ug/kg 5030B 12/13/19:214257 r 260B 12/13/19:219578 p-Isopropyltoluene ND 240* ug/kg 5030E 12/13/19:214257 r 260B 12/13/19:219578 Methyl tert-butyl ether ND 240* ug/kg 5030B 12/13/19:214257 8260B 12/13 19:21W5 (MTBE) 4-Methyl-2-pentanonc (MIBK) ND 1200 ug/kg 5030B 12/13/19:214257 8260B 12/13i 19:21957,� Methylene Chloride ND 490* ug/kg 5030B 12/13/19:214257 8260B 12/13/19:219578 Naphthalene ND 240* ug/kg 5030B 12/13/19:214257 8260B 12/13/19:219578 n-Propylbenzene ND 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:219578 Styrene ND 240* ug/kg 5030E 12/13/19:214257 `t260B 12/13/19:219578 tert-Amyl methyl ether ND 240* ug/kg 5030B 12/13119:214257 8260B 12/13/19:219578 (TAME) 1,1,1,2-Tetrachloroethane ND 240* ug/kg 5030B 12/13/19:214257 8260B 12/13/19:219578 1,1,2,2-Tetrachloroethane ND 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:219578 Tetrachloroethylene ND 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:219578 Toluene 496 240* ug/kg 5030E 12/13/19:214257 8260E 12/13/19:219578 1,2,3-Trichlorobenzene ND 240* ug/kg 5030B 12/13/19:214257 8260B 12/13/19:219578 1,2,4-Trichlorobenzene ND 240* ug/kg 5030B 12/13/19:214257 8260B 12/13/19:219578 1,1,1-Trichloroethane ND 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:219578 1,1,2-Trichloroethane ND 240* ug/kg 5030B 12/13/19:214257 8260B 12/13/19:21957S Trichloroethylene ND 240* ug/kg 5030B 12/13/19:214257 8260B 12/13/19:219578 Trichlorofluoromethane ND 240* ug/kg 5030B 12/13/19:214257 8260E 12/13/19:219578 1,2,4-Trimethylbenzene ND 240* ug/kg 5030B 12/13/19:214257 S260B 12/13/19:21957N 1,3,5-Trimethylbenzene ND 240* ug/kg 5030B 12/13/19:214257 8260B 12/13/19:21957N Vinyl Acetate ND 1200* ug/kg 5030B 12/13/19:214257 8260B 12/13/19:21957K Vinyl Chloride ND 240* ug/kg 5030E 12/13/19:214257 8260B 12/13/19:219578 Xylenes ND -- ug/kg 5030B 12/13/19:214257 8260B 12i13/19:219578 Page 17 of 41 January 13, 2020 Lab ID : SP 1916583-005 Description : Centrifuge Cake 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 240* ug/kg 5030B 12/13/19:214257 8260E 12/13/19:219571, X lenes o ND 240* u&kg 5030E III - 8260B 12/13/19:21957S EPA 8270 2-Fluorobiphenyl* 59.9 2-90* % 8270C 12116/19:214374 8270C 12/18/19:219663 2-Fluorophend 47.2 4-79* % 8270C 12/16/19:214374 8270C 12/18/19:21966; Nitrobenzene-d5$ 48.4 1-88* % 8270C 12/16/19:214374 8270C 12/18/19:219663 Phenol-d6$ 52.7 0-85* % 8270C 12/16/19:214374 8270C 12/18/19:21966? p-Terphenyl-dW 67.0 0-79* % 8270C 12/16/19:214374 8270C 12/18/19:219663 2,4,6-Tribromo henolt 80.8 0-100* % 8270C 12/16/19:214374 8270C 12/18/19:21966, Acenaphthene ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 Acenaphthylene ND 2.5* mg/kg 8270C 12/16/19214374 8270C 12/18/19:219663 Aniline ND 5* mg/kg 8270C 12/16119:214374 8270C 12/19119:219663 Anthracene ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12118119:219663 1,2-Diphenylhydrazine ND 2.5* mg/kg 8270C 12/16119:214374 8270C 12/18/19:21%63 Benzidine ND 5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 Benzo(a)anthracene ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 Benzo(b)fluoranthene ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 Benzo(k)fluoranthene ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 Benzo(g,h,i)perylene ND 2.5* mg/kg 8270C 12/16/19:214374 S270C 12/18/19:219663 Benzo(a)pyrene ND 2.5* mg/kg 8270C 12/16/19:214374 8,270C 12/19/19:219663 Benzoic Acid ND 5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 Benzylalcohol ND 5* mg/kg 8270C 12/16119:214374 8270C 12/19/19:219663 4-Bromophenylphenylether ND 2.5* mg/kg 8270C 12/16✓19:214374 8270C 12/19119:219661 Butylbenzylphthalate ND 2.5* mg/kg 8270C 12/16119:214374 8270C 12/18/19:219663 bis(2- ND 2.5* mg/kg 8270C 12/16/19:214374 I370C 12/18/19:219663 Chloroethoxy)methane bis(2-Chloroethyl)ether ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 bis(2-Chloroisopropyl)ether ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 bis(2-Ethylhexyl)phthalate ND 2.5* mg/kg 8270C 12/16119:214374 8270C 12/18/19:219663 4-Chloroaniline ND 2.5* mg/kg 8270C 12/16119:214374 8270C 12/19/19:219663 4-Chloro-3-methylphenol ND 5* mg/kg 8270C 12/16119:214374 8270C 12/18/19:219663 2-Chloronaphthalene ND 2.5* mg/kg 8270C 12/16119:214374 8270C 12/18/19:219663 2-Chlorophenol ND 5* mg/kg 8270C 12/16/19:214374 8270C 12/19/19:219661 4-Chlorophenylphenylether ND 2.5* mg/kg 8270C 12/16119:214374 8270C 12/18/19:219663 Chrysene ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 Dibenzo(a,h)anthracene ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 Dibenzofuran ND 5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 Di-n-butylphthalate ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 1,2-Dichlorobenzene ND 2.5* 1 m 8270C 12/16119:214374 1 8270C 12/18/19:219663 Page 18 of 41 January 13,2020 Lab ID : SP 1916583-005 Description : Centrifuge Cake Customer ID 2-11369 Sample Result- Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8270 1,3-Dichlorobenzene ND 2.5* mg/kg 8270C 12/16119:214374 K270C 12/I8/19:219663 1,4-Dichlorobenzene ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 3,3'-Dichlorobenzidine ND 2.5* mg/kg 8270C 12/16119:214374 8270C 12/18119:219663 2,4-Dichlorophenol ND 5* mg/kg 8270C 12/16119:214374 8270C 12/18/19:219663 Diethylphthalate ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 2,4-Dimethylphenol ND 5* mg/kg 8270C 12/16119:214374 8270C 12/18/19:219663 Dimethylphthalate ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 4,6-Dinitro-2-methylphenol ND 5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 2,4-Dinitrophenol ND 5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:21966; 2,4-Dinitrotoluene ND 2.5* mg/kg 8270C 12116/19:214374 8270C 12/18/19:219663 2,6-Dinitrotoluene ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 Di-n-octylphthalate ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 Fluoranthene ND 2.5* mg/kg 8270C 12/16119:214374 9270C 12/18/19:219663 Fluorene ND 2.5* mg/kg 8270C 12/16119:214374 9270C 12/18/19:219663 Hexachlorobenzene ND 2.5* mg/kg 8270C 12/16119:214374 9270C 12/18/19:21%63 Hexachlorobutadiene ND 2.5* mg/kg 8270C 12/16119:214374 8270C 12/18/19:219663 Hexachlorocyclopentadiene ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 Hexachloroethane ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 Indeno(1,2,3-c,d)pyrene ND 2.5* mg/kg 8270C 12/16/19:214374 9270C 12/18/19:219663 Isophorone ND 2.5* mg/kg 8270C 12/16119:214374 8270C 12/18/19:219663 2-Methylnaphthalene ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 2-Methylphenol ND 5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 3-and 4-Methylphenol ND 5* mg/kg 8270C 12/16/19:214374 8270C 12/19/19:219663 Naphthalene ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219661 2-Nitroanaline ND 5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 3-Nitroanaline ND 5* mg/kg 8270C 12/16/19:214374 8270C 12/18119:219663 4-Nitroanaline ND 5* mg/kg 8270C 12/16/19:214374 K270C 12/18/19:219663 Nitrobenzene ND 2.5* mg/kg 8270C 12/16/19:214374 K270C 12/18/19:219663 2-Nitrophenol ND 5* mg/kg 8270C 12/16119:214374 8270C 12/18/19:219663 4-Nitrophenol ND 5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 N-Nitrosodimethylamine ND 2.5* mg/kg 8270C 12116119:214374 8270C 12/18/19:219663 N-Nitrosodiphenylamine ND 2.5* mg/kg 8270C 12/16119:214374 8270C 12/18/19:219663 N-Nitrosodi-n-propylamine ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 Pentachlorophenol ND 5* mg/kg 8270C 12/16119:214374 8270C 12/19/19:219663 Phenanthrene ND 2.5* mg/kg 8270C 12/16119:214374 8270C 12/18/19:219663 Phenol ND 5* mg/kg 8270C 12/16/19:214374 K270C 12/18/19:219663 Pyrene ND 2.5* mg/kg 8270C 12/16/19:214374 S270C 12/18119:219663 1,2,4-Trichlorobenzene ND 1 2.5* 1 mg/k& 8270C 12/16/19214374 Q70C 12/18/19:219663 Page 19 of 41 January 13, 2020 Lab ID : SP 1916583-005 Description : Centrifuge Cake Customer ID 2-11369 Sample Result-Organic Constituent Result PQL Units Note Sample Preparation Sample Analysis Method Date/ID Method Date/ID EPA 8270 2,4,5-Trichlorophenol ND 5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 2,4,6-Trichlorophenol ND 5* mg/kg 8270C 12/16119:214374 8270C 12/18/19:219663 Pyridine ND 2.5* mg/kg 8270C 12/16/19:214374 8270C 12/18/19:219663 2,3,4,6-Tetrachloro henol ND 5* mg/ki I 8270C 12/16/19:214374 1 8270C 12/18/19:219663 ND=Non-Detected.PQL=Practical Quantitation Limit.$Surrogate.'PQL adjusted for dilution. Page 20 of 41 ENVIRONMENTAL Analytical Chemists January 13, 2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control - Organic Constituent Method Date/ID Tape (Bits Gone. Q( D:ua DQO Sote Organic 1,1,1,2-Tetrachloroethane 5030B 12/13/19:214257VRG Blank u,-L_ ND 5030B 12/13/19:214487VRG Blank I I ND <0.5 1.1,1-Trichloroethane(TCA) 5030B 12/13/19:214257VRG Blank ul ND <250 5030B 12/13/19:214487VRG Blank u I ND <0.5 1.1,2,2-Tetrachloroethane 5030E 12/13/19:214257VRG Blank us!ik ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <0.5 1.1,2-Trichloroethane 5030B 12/13/19:214257VRG Blank ug/kg ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <0.5 1.1-Dichloroethane 5030B 12/13/19:214257VRG Blank u ke ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <0.5 I.1-Dichloroethylene 5030B 12/13/19:214257VRG Blank ug/kg ND <250 LCS ug/kg 3125 39.4% 0-109 MS ug/kg 3148 33.1% 0-107 (SP1916737-001) MSD ug/kg 3111 33.0% 0-107 MSRPD ug/kg 0.000 1.5% 1 <38.1 5030B 12/13/19:214487VRG Blank ug/L ND <0.5 LCS ug/L 25.00 92.8% 52-137 MS ug/L 25.00 121% 25-179 (SP1916583-001) MSD ug/L 25.00 117% 25-179 MSRPD ugfL 25.00 3.3% <_26 I,1-Dichloropropenc 5030B 12/13/19:214257VRG Blank Llgfkg ND <250 5030B 12/13/19:214487VRG Blank UgfL ND <0.5 1.2.3-Trichlorobenzene 5030B 12/13/19:214257VRG Blank a ND <250 5030B 12'13/19:214487VRG Blank ug/L ND <5 I,2,4-Trichlorobenzene 5030B 12/13/19:214257VRG Blank ug/kg ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <5 1,2,4-Trimethylbenzene 5030B 12/13/19:214257VRG Blank ug/kg ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <0.5 1,2-Dichlorobcnzene 5030B 12/13/19:214257VRG Blank u g ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <0.5 2-Dichloroethane(EDC) 5030E 12/13/19:214257VRG Blank u ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <0.5 1.2-Dichloroethaned4 5030E 12/13/19:214257VRG Blank ug/kg 1250 107% 59-166 LCS ug/kg 1250 128% 59-166 Ms ug/kg 1259 104% 48-123 (SP 1916737-001) MSD ug/kg 1244 114% 48-123 MSRPD u 0.000 8.0% 1 <_20.0 5030B 12/13/19:214487VRG Blank ug/L 25.00 114%, 58-144 LCS ug/L 25.00 112°i,) 58-144 MS ug/L 25.00 112% 0-200 (SP 1916583-001) MSD ug/L 25.00 111% 0-200 MSRPD u 25.00 0.8% _<20.0 1.2-Dichloropropane 5030B 12/13/19:214257VRG Blank a ND <250 5030B 12/13/19:214487VRG Blank u ND <0.5 1,3,5-Trimethylbenzene 5030B 12/13/19:214257VRG Blank a ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <0.5 1,3-Dichlorobenzene 5030B 12/13/19:214257VRG Blank a ND 250 5030B 12/13/19:214487VRG Blank u,'1. ND <0.5 1.3-Dichloropropane 5030B 12/13/19:214257VRG Blank u,k, ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <0.5 I.4-Dichlorobenzene 5030B 12/13/19:214257VRG Blank u ND <250 503013 12/13/19:214487VRG Blank ug/L ND <0.5 2-Dichloropropane 5030B 12/13/19:214257VRG Blank u ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <0.5 Butanone(MEK) 5030B I2'13/19:214257VRG Blank u ND < 250 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)525-4172IAg 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 Certfication No.2775 CA ELAP Certification No.2810 January 13, 2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/(D Type Cflits Conc. Q( Data UQO Note Organic Butanone(MEK) 5030B 12/13/19:214487VRG Blank ug/L ND <10 '_-Chlorotolucnc 5030B 12/13/19:214257VRG Blank Llgikg ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <0.5 2-Hexanone 5030B 12/13/19:214257VRG Blank u ND <1250 5030B 12/13/19:214487VRG Blank ug/L ND <10 Bromofluorobenzene 5030B 12/13/19:214257VRG Blank ug/kg 1250 96.3% 69-130 LCS ug/kg 1250 112% 69-130 MS ug/kg 1259 91.6% 48-110 (SP 1916737-001) MSD ug/kg 1244 103% 48-110 MSRPD uglkp 0.000 10.4% <20.0 5030B 12/13/19:214487VRG Blank ug/L 25.00 99.9% 78-123 LCS ug/L 25.00 95.7% 78-123 MS ug/L 25.00 98.1% 0-200 (SP 1916583-001) MSD ug/L 25.00 99.3% 0-200 MSRPD u 25.00 1.3% <20.0 -Chlorotolucnc 5030B 12/13/19:214257VRG Blank ugfkg ND <250 5030B 12/13/19:214487VRG Blank u ND <0.5 -Methyl-2-pentanone(MIBK) 5030B 12/13/19:214257VRG Blank a ND <1250 5030B 12/13/19:214487VRG Blank u ND <10 Acetone 5030B 12/13/19:214257VRG Blank a ND <1250 5030B 12/13/19:214487VRG Blank u L ND <50 4crolcin 5030B 12/13/19:214257VRG Blank a ND <1500 5030B 12/13/19:214487VRG Blank u L ND <50 lcrylonitrile 5030B 12/13/19:214257VRG Blank a ND <1500 5030B 12/13/19:214487VRG Blank u ND <50 Benzene 5030B 12/13/19:214257VRG Blank ug/kg ND <250 LCS ug/kg 3125 46.1% 25-156 MS ug/kg 3148 38.2% 14-157 (SP 1916737-001) MSD ug/kg 3111 39.0% 14-157 MSRPD Llgjkg 0.000 0.9% 1 <37.9 5030B 12/13/19:214487VRG Blank ug(L. ND <0.5 LCS ug(L 25.00 106% 60-134 MS ug(L. 25.00 128% 47-169 (SP 1916583-001) MSD ug(L. 25.00 125% 47-169 MSRPD ugIL 25.00 1.90/0 <24 Bromobenzene 5030B 12/13/19:214257VRG Blank u ND <250 5030B 12/13/19:214487VRG Blank u ND <0.5 Bromochloromethane 5030B 12/13/19:214257VRG Blank u ND <250 5030B 12/13/19:214487VRG Blank ugfL ND <0.5 Bromodichloromethane 5030B 12/13/19:214257VRG Blank u ND <250 5030B 12/13/19:214487VRG Blank u ND <0.5 romoform 5030B 12/13119:214257VRG Blank a ND <250 5030B 12/13/19:214487VRG Blank u ND <2 Bromomethane(Methyl Bromide) 5030B 12/13/19:214257VRG Blank a ND <250 5030B 12/13/19:214487VRG Blank u ND <0.5 Carbon Disulfide 50308 12/13119:214257VRG Blank ttgfkg ND <1250 5030B 12/13/19:214487VRG Blank u ND <Io Carbon Tetrachloride 5030B 12/13/19:214257VRG Blank u ND <250 5030B 12/13/19:214487VRG Blank u ND <1 'hlorobenzene 5030B 12/13/19:214257VRG Blank ug/kg ND <250 LCS ug/kg 3125 41.8% 31-151 MS ug/kg 3148 34.0% 0-186 (SP 1916737-001) MSD ug/kg 3111 36.5% 0-186 MSRPD u 0.000 5.9% <40.3 Page 22 of 41 January 13,2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control - Organic Constituent Method Date/ID Icpe Units Conc. QC Data DQO Note Organic hlorobenzene 5030E 12,13/19:214487VRG Blank ug/L ND <0.5 LCS ugfL 25.00 104% 56-152 MS ug/L 25.00 108% 31-212 (SP 1916583-001) MSD ug/L 25.00 103% 31-212 MSRPD ug/L 25.00 4.8% <27 hlorocthane(Ethyl Chloride) 5030B 12/13/19:214257VRG Blank u ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <1 Chloroform 5030B 12/13/19:214257VRG Blank u ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <l hloromethane(Methyl Chloride) 5030E 12/13/19:214257VRG Blank u ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <0.5 cis-1,2-Dichloroethylenc 5030E 12/13/19:214257VRG Blank u ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <0.5 cis-1,3-Dichloropropenc 5030E 12/13/19:214257VRG Blank u9 ND <250 5030E 12/13/19:214487VRG Blank ug/L ND <0.5 Dibromochloromcthane 5030B 12/13/19:214257VRG Blank u ND <250 5030B 12/13/19:214487VRG Blank ugfL ND <2 Dibromofluromethane 5030E 12/13/19:214257VRG Blank ug/kg 1250 109% 50-162 LCS ug/kg 1250 129% 50-162 MS ug/kg 1259 99.1% 48-132 (SP 1916737-001) MSD ug/kg 1244 115% 48-132 MSRPD I ugfkg 0.000 13.9% <20.0 5030B 12/13/19:214487VRG Blank ug/L 25.00 108% 65-125 LCS ug/L 25.00 106% 65-125 MS ug/L 25.00 109% 0-200 (SP 1916583-001) MSD ug/L 25.00 108% 0-200 MSRPD ug/L 5 00 0.90/0 :520.0 Dibromomethane 5030B 12/13/19:214257VRG Blank ugfkg ND <250 5030B 12/13/19:214487VRG Blank 1191L ND <0.5 Dichlorodifluoromethanc 5030B 12/13/19:214257VRG Blank u ND <250 5030E 12/13/19:214487VRG Blank ug/L ND <0.5 Dichloromethane 5030B 12/13/19:214257VRG Blank u ND <500 5030B 12/13/19:214487VRG Blank u ND <5 Ethyl tort-Butyl Ether 5030B 12/13/19:214257VRG Blank u ND <25o 5030B 12/13/19:214487VRG Blank ug/L ND Ethylbenzene 5030B 12/13/19:214257VRG Blank ugfkg ND '>0 5030E 12/13/19:214487VRG Blank ug/L ND > Freon-II 5030E 12/13/19:214257VRG Blank uglkg ND <250 503OB 12/13/19:214487VRG Blank u ND <1 Ilexachlorobutadiene 5030B 12113/19:214257VRG Blank u 83.8 250 5030B 12/13/19:214487VRG Blank u ND <5 Isopropyl Ether 5030E 12/13/19:214257VRG Blank u ND <250 5030E 12/13/19:214487VRG Blank ugfL ND <5 Isopropylbenzene 5030B 12/13/19:214257VRG Blank uglkg ND <250 5030B 12/13/19:214487VRG Blank ugfL ND <0.5 Methyl tert-Butyl Ether(MTBE) 5030B 12/13/19:214257VRG Blank u ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <2 Naphthalene 5030B 12/13/19:214257VRG Blank ugfkg ND <250 503OB 12/13/19:214487VRG Blank u L ND <5 Butylbenzene 5030B 12/13/19:214257VRG Blank ugfkg ND <250 5030B 12/13/19:214487VRG Blank u ND <0.5 Propylbenzene 50306 12/13/19:214257VRG Blank u ND <250 503OB I 12/13/19:214487VRG Blank u ND <0.� p-Isopropyltoluene I 50306 12/13/19:214257VRG Blank ugfkg ND <250 Page 23 of January 13, 2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control - Organic Constituent Method Date/ID Tcpe Cnits one. QC Data DQO Note Organic p-Isopropyltoluene 5030E 12/13/19:214487VRG Blank ug/L ND 0.5 sec-Butylbcnzene 5030B 12/13/19:214257VRG Blank ugikg ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <0.5 Styrene 5030E 12/13/19:214257VRG Blank u ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <0.5 TAME 5030E 12/13/19:214257VRG Blank ug/kg ND <250 5030E 12/13/19:214487VRG Blank ug/L ND <5 crt-Butanol 5030E 12/13119:214257VRG Blank ug/kg ND <1250 5030B 12/13/19:214487VRG Blank ug/L ND <5 crt-Butylbenzene 5030B 12/13/19:214257VRG Blank u ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <0.5 ctrachlorocthylene(PCE) 5030B 12/13/19:214257VRG Blank ug/kg ND <250 5030B 12/13/19:214487VRG Blank ug/L ND <0.5 Toluene 5030B 12/13/19:214257VRG Blank ug/kg ND <250 LCS ug/kg 3125 47.7% 29-151 MS ug/kg 3148 39.8% 14-162 (SP 1916737-001) MSD ug/kg 3111 41.3% 14-162 MSRPD I u 0.000 1 2.4% <35.8 5030E 12/13/19:214487VRG Blank ug/L ND <0.5 LCS ug/L 25.00 106% 56-131 MS ug/L 25.00 119% 44-164 (SP 1916583-001) MSD ug/L 25.00 113% 44-164 MSRPD ug/L 25.00 4.6% <30 oluenc-d8 5030B 12/13/19:214257VRG Blank ug/kg 1250 107% 66-143 LCS ug/kg 1250 126% 66-143 MS ug/kg 1259 101% 49-124 (SP 1916737-001) MSD ug/kg 1244 113% 49-124 MSRPD u 0.000 10.1% <20.0 5030B 12/13119:214487VRG Blank ug/L 25.00 107% 92-107 LCS ug/L 25.00 109% 92-107 MS ug/L 25.00 108% 0-200 (SP 1916583-001) MSD ug/L 25.00 107% 0-200 MSRPD u 25.00 0.7% <20 vans-1,2-Dichlorocthylcne 5030B 12/13/19:214257VRG Blank u ND <250 5030B 12/13/19:214487VRG Blank ugfL ND <0.5 trans-1,3-Dichloropropene 5030B 12/13/19:214257VRG Blank u ND <250 5030E 12/13/19:214487VRG Blank ug/L ND <0.5 richloroethylene(TCE) 5030B 12/13/19:214257VRG Blank ug/kg ND <250 LCS ug/kg 3125 44.6% 26-162 MS ug/kg 3148 36.7% 10-171 (SP 1916737-001) MSD ug/kg 3111 37.5% 10-171 MSRPD u 0.000 0.8% 1 544.7 5030B 12/13/19:214487VRG Blank ug/L ND <0.5 LCS ug/L 25.00 99.9% 61-123 MS ug/L 25.00 119% 41-167 (SP1916583-001) MSD ugfL 25.00 113% 41-167 MSRPD u 25.00 4.9% 532 Vinyl Acetate 5030B 12/13/19:214257VRG Blank u ND <1250 5030B 12/13/19:214487VRG Blank ug/L ND <10 Vinyl Chloride 5030B 12/13/19:214257VRG Blank ugfkg ND <250 5030B 12/13/19:214487VRG Blank ugfL ND <0.5 ylenes m,p 5030B 12/13/19:214257VRG Blank u ND <250 5030B 12/13/19:214487VRG Blank ugfL ND <2 X leneso I 0306 12/13 19:214257VRG Blank ug/kg <250 Page 24 of 41 January 13,2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Units ('one. QC Data DQO rote Organic Xylenes o 5030B 12/13/19:214487VRG Blank ua L ND <2 Aldrin 608/8081 12/09/19:214038caa Blank ug/L ND <0.05 LCS ug/L 0.5000 71.3% 38-122 BS ug/L 0.5000 47.4% 26-126 BSD ug/L 0.4673 96.1% 26-126 BSRPD u 0.4682 61.8% <20 410 608/8081 12/11/19:219206SBL CCV ug/L 50.00 111% 85-115 CCV ug/L 25.00 111% 85-115 CCV u 50.00 107% 85-115 Alpha BHC 608/8081 12/09/19:214038caa Blank ug/L ND <0.05 LCS ug(L. 0.5000 81.7% 43-119 BS ug/L 0.5000 47.8% 48-124 BSD ug/L 0.4673 110% 48-124 BSRPD ug/L 0.4682 72.9% <14 n 608/8081 12/11/19:219206SBL CCV ug/L 50.00 115% 85-115 CCV ug/L 25.00 115% 85-115 CCV u 50.00 115% 85-115 Beta BHC 608/8081 12/09/19:214038caa Blank ug/L ND <0.05 LCS ug/L 0.5000 118% 35-124 BS ug/L 0.500u 53.3% 50-123 BSD ug/L 0.4673 146% 50-123 436 BSRPD -ugfL 0.4682 87.90/6 <15 410 608/8081 12/11/19:219206SBL CCV ug/L 50.00 112% 85-115 CCV ug/L 25.00 114% 85-115 CCV u 50.00 114% 85-115 Chlordanc 608/8081 12/09/19:214038caa Blank u ND <0.I DDD 608/8081 12/09/19:214038caa Blank ug/L ND <0.05 LCS ug/L 0.5000 80.0% 38-129 BS ug/L 0.5000 77.6% 32-130 BSD ug/L 0.4673 82.7% 32-130 BSRPD ugfL 0.4682 0.4% <37 DDi 608/8081 12/09/19:214038caa Blank ug/I ND <0.05 LCS ug/L 0.5000 110% 33-133 BS ug/L 0.5000 81.8% 13-133 BSD ug/L 0.4673 120% 13-133 BSRPD u 0.4682 31.4% <116 DD 1 608/8081 12/09/19:214038caa Blank ug/L ND <0.05 LCS ug/L 0.5000 61.6% 45-127 BS ug/L 0.5000 66.4% 6-146 BSD ug/L 0.4673 62.3% 6-146 BSRPD u 0.4682 13.1% 516 Delta BHC 608/8081 12/09/19:214038caa Blank ug/L ND <0.05 LCS ug/L 0.5000 79.8% 38-132 BS ug/L 0.5000 48.8% 45-132 BSD ug/L 0.4673 98.4% 45-132 BSRPD ug1L 0.4682 61.3% <15 410 609/8081 12111/19:219206SBL CCV ug/L 50.00 111% 85-115 CCV ug/L 25.00 115% 85-115 CCV u 50.00 115% 85-115 Uirl iris 608/8081 12/09/19:214038caa Blank ug/L ND gt LCS ug/L 0.5000 33.0% 320 BS ug/L 0.5000 33.0/ 436 BSD ug/L 0.4673 39.9% 436 0.622 Page 25 of 41 January 13, 2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID -IN PC Cnits Cone. QC Data DQO Note Organic Dicldrin 608/8081 12/11/19:219206SBL CCV ug/L 50.00 99.2% 85-115 CCV ug/L 25.00 104% 85-I15 CCV u 50.00 91.7% 85-115 Lndosulfan 1 608/8081 12/09/19:214038caa Blank ug/L ND <0.05 LCS ug/L 0.5000 80.0% 10-174 BS ug/L 0.5000 76.5% 17-168 BSD ug/L 0.4673 93.3% 17-168 BSRPD ug/L 0.4682 13.00/. <22 608i80 I 12/11/19:219206SBL CCV ug/L 50.00 110°/0 85-115 CCV ug/L 25.00 115% 85-115 CCV ug/L 50.00 109°/o 85-115 Hndosulfan II 608/8081 12/09/19:214038caa Blank ug/L ND <0.05 LCS ug/L 0.5000 80.5 9,, 0-241 BS ug/L 0.5000 83.00„ 0-291 BSD ug/L 0.4673 87.5% 0-291 BSRPD u 0.4682 1.5% <24 608/8081 12/11/19:219206SBL CCV u9/L 50.00 109% 85-115 CCV ug/L 25.00 114% 85-115 CCV ugIL 50.00 103% 85-115 1ndosulfanSulfate 608/8081 12/09/19:214038caa Blank ug/L ND <0.0 LCS ug/L 0.5000 52.8°/ 34-131 BS ug/L 0.5000 63.7°r 47-128 BSD ug/L 0.4673 32.2 41, 47-128 436 BSRPD ugfL 0.4682 0.17 <0.05 410 608/8081 12/11/19:219206SBL CCV u9/L 50.00 102% 85-115 CCV ug/L 25.00 108% 85-115 CCV u 50.00 99.5°/,. 85-115 I ndrin 608/8081 12/09/19:214038caa Blank ug/L ND <0.05 LCS ug/L 0.5000 6.1% 0-189 BS ug/L 0.5000 15.7°/o 43-132 4,o BSD ug/L 0.4673 6.8%, 43-132 436 BSRPD u 0.4682 0.047 50.05 608/8081 12/11/19:219206SBL CCV ug/L 50.00 119% 85-115 360 CCV ug/L 25.00 131% 85-115 360 CCV u 50.00 124ON 85-115 360 t:ndrin Aldehyde 608/8081 12/09/19:214038caa Blank ug/L ND <0.05 LCS ug/L 0.5000 111% 31-133 BS ug/L 0.5000 82.1%, 16-116 BSD ug(L 0.4673 110% 16-116 BSRPD u 0.4682 22.3% <13 410 608/8081 12/11/19:219206SBL CCV ug/L 50.00 101% 85-115 CCV ug/L 25.00 105% 85-115 CCV u 50.00 92.3 85-115 1:ndrin Ketone 608/8081 12/09/19:214038caa Blank ug/L NI) <0.05 LCS ug/L 0.5000 89.3"% 34-150 BS ug/L 0.5000 102% 28-162 BSD ug/L 0.4673 88.1 28-162 BSRPD ug/L 0.4682 21.0°/, 520 -t h 608/8081 12/11/19:219206SBL CCV ug/L 50.00 102 85-115 CCV ug/L 25.00 106° 85-115 CCV ug/L 50.00 91.8? 85-115 1leptdrhlor 608/8081 12/09/19:214038caa Blank ug/L ND <0.05 LCS ug L 0.5000 16.9 34-126 320 BS u LL 1 0.5000 33.5% 41-114 436 Page 26 of 41 January 13, 2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control - Organic Constituent Method Date/ID l.Npe Units Cone. QC Data DQO Note Organic Heptachlor 608/8081 12/09/19:214038caa BSD ug/L 0.4673 19.9% 41-114 436 BSRPD u 0.4682 0.074 _<0.05 410 608/8081 12/11/19:219206SBL CCV ug/L 50.00 1 1; 85-11 CCV ug/L 25.00 1 l5% 85-1 l5 CCV u 50.00 1 l4% 85-115 Heptachlor Epoxide 608/8081 12/09/19:214038caa Blank ug/L ND <0.05 LCS ug/L 0.5000 89.2% 39-126 BS ug/L 0.5000 69.0% 45-122 BSD ug/L 0.4673 105% 45-122 BSRPD u 0.4682 34.5% <23 410 608/8081 12/11/19:219206SBL CCV ug/L 50.00 110% 85-115 CCV ug/L 25.00 112% 85-115 CCV UgIL 50.00 103% 85-115 elan 608/8081 12/09/19:214038caa Blank ug/L ND <0.05 LCS ug/L 0.5000 84.6% 41-123 BS 1 0.5000 49.2% 46-127 BSD ue 1 0.4673 110% 46-127 BSRPD ug*1 0.4682 70.7% <16 410 608/8081 12/11/19:219206SBL CCV U&L 50.00 115% 85-115 CCV ug/L 25.00 113% 85-115 CCV u 50.00 114% 85-115 \1cthoxychlor 608/8081 12/09/19:214038caa Blank ug/L ND <0.1 LCS ugfL 0.5000 25.4% 23-142 BS ug/L 0.5000 21.6% 51-126 436 BSD ug/L 0.4673 19.0% 51-126 436 BSRPD ugfL 0.4682 0.019 <o.I 608/8081 12/11/19:219206SBL CCV ug/L 50.00 114 85-115 CCV ug/L 25.00 146 85-115 CCV ug/L 50.00 130% 85-115 608/8081 12/11/19:219206SBL CCV ug/L 50.00 110% 85-115 CCV ug/L 25.00 112°/. 85-115 CCV ug/L 50.00 106% 85-115 .p-DDE 608/8081 12/11/19:219206SBL CCV ug/L 50.00 114°/0 85-115 CCV ug/L 25.00 114% 85-115 CCV -ug/L 50.00 114% 85-115 p-DDT 608/8081 12/11/19:219206SBL CCV ug/L 50.00 115°/o 85-115 CCV ug/L 25.00 129% 85-115 W CCV u �0.00 110°/a 85-115 PCB 1016-1 608/8081 12/09/19:214038caa Blank u L ND <0.5 PCB 1221-1 608/8081 12/09/19:214038caa Blank ug/L ND <0.5 PCB 1232-1 608/8081 12/09/19:214038caa Blank ug/L ND <0.5 PCB 1242-1 608/8081 12/09/19:214038caa Blank ugfL ND <0.5 PCB 1248-1 608/8081 12/09/19:214038caa Blank ug/L ND <0.5 PCB 1254-1 608/8081 12/09/19:214038caa Blank ugfL ND <0.5 PCB 1260-1 608/8081 12/09/19:214038caa Blank ug/L ND 0.5 etrachloro-m-xylene 608/8081 12/09/19:214038caa Blank ug/L 0.5000 61.0% 15-143 LCS ug/l. 0.5000 46.9% 15-143 BS Ug/L 0.5000 28.4% 26-141 BSD ug/l. 0.4673 61.8% 26-141 BSRPD ugfL 1 0.4682 0.15 <_0.05 410 608/8081 12/11/19:219206SBL CCV u91 50.05 ]107% 85-115 CCV ug/L 25.0207°m 85-115 CCV u 50.0510 0/0 85-115 oxa hone 608/8081 1 12/09/19:214038caa I Blank ugfL <0.5 Page 27 of 41 January 13, 2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control - Organic Constituent Method Date/ID Tcpe Lnits Conc. QC Data DQO Note Organic 1,2,4-Trichlorobenzene 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.00 36.4% 0-123 MS ug/L 33.33 16.1% 23-108 435 (SP 1916583-004) MSD ug/L 33.33 72.1% 23-108 MSRPD I ugfL 33.33 127% 1 530 435 625 12/16/19:219544SBL CCV m L 20.00 109% 80-120 1.2-Dichlorobenzene 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.00 34.0% 0-124 MS ug/L 33.33 14.3% 21-115 435 (SP 1916583-004) MSD ug/L 33.33 69.5% 21-115 MSRPD u 33.33 132% <30 435 625 12/16/19:219544SBL CCV m L 20.00 97.8% 80-120 1.2-Diphenylhydrazinc 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.00 73.4% 2-144 MS ug/L 33.33 41.8% 34-126 (SP 1916583-004) MSD ug/L 33.33 73.3% 34-126 MSRPD a 33.33 54.7% <30 435 1.3-Dichlorobenzene 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/l, 20.00 29.6% 0-115 MS ug/L 33.33 12.8% 17-108 435 (SP 1916583-004) MSD ug/L 33.33 63.2% 17-108 MSRPD u 33.33 133% <30 435 625 12/16/19:219544SBL CCV m 20.00 96.8% 80-120 Ui�hlamh�n�cnc 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.00 31.8% 0-119 MS ug/L 33.33 13.6% 20-112 435 (SP 1916583-004) MSD ug/L 33.33 66.5% 20-112 MSRPD ugfL 33.33 132% <30 435 625 12/16/19:219544SBL CCV m 20.00 95.6% 80-120 '.4.,-Trichlorophenol 625 12/10/19:214089caa Blank ug/L. ND <2 LCS ug/L 20.05 30.5% 0-181 MS ug/L 33.42 13.9% 32-156 435 (SP 1916583-004) MSD ug/L 33.42 104% 32-156 MSRPD ugfL 33.33 153% <30 435 625 12/16/19:219544SBL CCV nt /L 20.00 120% 70-130 1,4,6-Tribromophenol 625 12/10/19:214089caa Blank ug/L 20.00 4.3% 38-109 LCS ug/L 20.00 44.3% 38-109 MS ug/L 33.33 28.3% 38-109 1 (SP 1916583-004) MSD ug/L 33.33 76.5% 38-109 MSRPD ug/L 33.33 92.00/9 <30 1 625 12/16119:219544SBL CCV m L 20.00 1 112% 80-120 4,6-Trichlorophenol 625 12/10/19:214089caa Blank ug/L. ND <1 L.CS ug/L 20.04 21.1% 0-170 MS ug/L 33.40 3.9% 31-135 435 (SP 1916583-004) MSD ug/L 33.40 88.1% 31-135 MSRPD ugfL 33.33 183% <30 435 625 12/16119:219544SBL CCV m 20.00 120% 80-120 _'A-Dichlorophenol 625 12/10/19:214089caa Blank ug/L ND <2 LCS ug/L 20.09 15.8% 0-157 MS ug/L 33.48 10.0% 29-136 435 (SP 1916583-004) MSD ug/L 33.48 88.2% 29-136 MSRPD ugfL 33.33 159% <30 435 625 12/16/19:219544SBL I CCV mgfL 20.00 120% 1 80-120 4-Dimeth 1 henol 625 12/10/19:214089caa I Blank u ND <2 Page 28 of 41 January 13, 2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control - Organic Constituent Method WWII) TNpe Units Conc. QC Data DQO Note Organic 1.4-Dimethylphenol 625 12/10/19:214089caa LCS 20.07 49.2% 0-111 MS ug/L 33.45 17.9% 0-142 (SP 1916583-004) MSD ug/L 33.45 58.6% 0-142 MSRPD ugIL 33.33 106% _<30 435 625 12/16/19:219544SBL CCV m L 20.00 105% 80-120 '.4-Dinitrophcnol 625 12/10/19:214089caa Blank ug/L ND <5 LCS ug/L 20.09 74.2% 0-169 MS ug/L 33.48 13.3% 20-148 435 (SP 1916583-004) MSD u9/1. 33.48 30.4% 20-148 MSRPD ue/L 33.33 5.7 <5 435 625 12/16/19:219544SBL CCV m i 20.00 102% 80-120 '.4-Dinitrotolucnc 625 12/10/19:214089caa Blank ug L ND <1 LCS ug/L 20.00 72.7% 0-171 MS ug/L 33.33 44.6% 34-145 (SP 1916583-004) MSD ug/L 33.33 73.8% 34-145 MSRPD u 33.33 49.2% <30 41 625 12/16/19:219544SBL CCV In 20.00 102% 80-120 '.6-Dinitrotoluene r�15 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.00 80.6% 0-178 MS ug/L 33.33 46.5% 34-149 (SP 1916583-004) MSD ug/L 33.33 92.9% 34-149 MSRPD u 33.33 66.5% 530 43, ' 12/16/19:219544SBL CCV m 20.00 122% 80-120 360 '-Chlorophenol 625 12/10/19:214089caa Blank ug/L ND <2 LCS ug/L 20.10 10.7% 0-141 MS ug/L 33.50 8.4% 18-134 435 (SP 1916583-004) MSD ug/L 33.50 75.3% 18-134 MSRPD ugfL 33.33 160% <30 435 625 12/16/19:219544SBL CCV m 20.00 101% 80-120 Fluorobiphcn\l 625 12/10/19:214089caa Blank ug/L 10.00 13.8% 23-97 LCS ug/L 10.00 52.5% 23-97 MS ug/L 16.67 23.3% 23-97 (SP 1916583-004) MSD ug/L 16.67 75.1% 23-97 MSRPD u 33.33 105% <30 a ("5 12/16/19:219544SBL CCV m /L 10.00 114% 80-120 '-Fluorophenol 625 12/10/19:214089caa Blank ug/L 20.00 0.06% 7-111 LCS ug/L 20.00 4.4% 7-111 325 MS ug/L 33.33 3.2% 7-111 435 (SP 1916583-004) MSD ug/L 33.33 63.1% 7-I11 MSRPD u 33.33 181% <30 435 625 12116119:219544SBL CCV mgfL 20.00 101% 80-120 '-Nitrophenol 625 12/10/19:214089caa Blank ug/L ND <2 LCS ug/L 20.08 14.3% 0-161 MS ug/L. 33.47 7.7% 32-136 435 (SP 1916583-004) MSD ug/L 33.47 81.5% 32-136 MSRPD U91 33.33 165% <30 435 625 12/16/19:219544SBL CCV m 20.00 118% 80-120 .3-Dichlorobenzidine 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug(L 20.00 54.4% 0-151 MS ugfL 33.33 9.0% 0-109 (SP 1916583-004) MSD ug/L. 33.33 9.4% 0-109 MSRPD ugIL 33.33 0.16 <1 625 12/16/19:219544SBL CCV m 20.00 1 146% 80-120 LEI 6-Dinitro-2-meth I henol 625 12/10/19:214089caa Blank u L ND <2 Page 29 of 41 January 13, 2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID T)pe Units Conc. QC Data DQO NUIc Organic ,6-Dinitro-2-mcthylphenol 625 12/10/19:214089caa LCS ug/L 20.06 71.3% 0-159 MS ug/L 33.43 17.6% 22-142 (SP 1916583-004) MSD ug/L 33.43 42.7% 22-142 MSRPD u 33.33 83.5% <30 435 4.6-Dinitro-o-crcsol 625 12/16/19:219544SBL CCV m L 20.00 94.8% 80-120 Bromophenylphcnylcthcr 625 12/10/19:214089caa Blank ug/L. ND <I LCS ug/L 20.00 83.1% 4-145 MS ug/L 33.33 51.8% 36-125 (SP 1916583-004) MSD ug/L 33.33 85.2% 36-125 MSRPD uRfL 33.33 48.7% <30 0; 625 12/16/19:219544SBL CCV m 20.00 116% 80-120 Nitrophenol 625 12/10/19:214089caa Blank ug/L ND <2 LCS ug/L 20.10 64.4% 3-165 MS ug/L 33.50 40.3% 13-205 (SP 1916583-004) MSD ug/L 33.50 68.5% 13-205 MSRPD ugfL 33.33 51.90/0 <30 435 625 12/16/19:219544SBL CCV M91L 20.00 90.0% 80-120 Acenaphthene 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.03 55.0% 0-138 MS ug/L. 33.38 24.6% 29-122 435 (SP 1916583-004) MSD ug/L. 33.38 74.5% 29-122 MSRPD ug/L 33.33 101% <30 43i 625 12/16/19:219544SBL CCV m•_1 -10.00 96.9% 80-120 Acenaphthylcnc 625 12/10/19:214089caa Blank ua&Z ND <l LCS ug/L 20.02 56.8% 0-143 MS ug/L 33.37 17.0% 29-127 A (SP 1916583-004) MSD ug/L 33.37 48.8% 29-127 MSRPD ug/L 33.33 96.6% <30 1 625 12/16/19:219544SBL CCV m 20.00 96.2% 80-120 \nthraccnc 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.04 71.4% 4-140 MS ug/L 33.40 36.1% 29-131 (SP 1916583-004) MSD u 1 33.40 49.2% 29-131 MSRPD ug L 33.33 30.7% 530 -1 'S 12/16/19:219544SBL CCV m L 20.00 97.0% 80-120 obenzene 625 12/16/19:219544SBL CCV mgfL 20.00 103% 80-120 cnzidinc 625 12/10/19:214089caa Blank ug/L. ND <2 LCS ug/L 20.00 54.9% 0-21 MS ug/L 33.33 18.8% 0-21 (SP 1916583-MI) MSD ug/L 33.33 20.8% 0-21 MSRPD uRfL 33.33 0.66 1 <2 625 12/16/19:219544SBL CCV m L 20.00 117% 70-130 enzo(a)anthracene 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.07 86.7% 2-146 MS ug/L 33.45 67.4% 25-131 (SP 1916583-004) MSD ug/L 33.45 69.1% 25-131 MSRPD u 33.33 2.4% <30 625 12/16119:219544SBL CCV m 20.00 109% 80-120 cnzo(a)pyrcne 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.06 75.7% 5-142 MS ug/L 33.43 46.8% 18-129 (SP 1916583-004) MSD ug/L 33.43 21.5% 18-129 MSRPD ugfL 33.33 74.0°/u <30 a 625 12/16/19:219544SBL I CCV m 20.00 101% 80-120 Page 30 of 41 January 13,2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control - Organic Constituent Method Date/ID Tcpe L'nits Cone. QC Data DQO Note Organic Benzo(b)fluoranthcne 625 12i10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.02 81.3% 5-150 MS ug/L 33.37 70.5% 29-127 (SP 1916583-004) MSD ug/L 33.37 79.1% 29-127 MSRPD u 33.33 11.5% <30 625 12/16/19:219544SBL CCV m 20.00 100% 80-120 Benzo(g,h,i)perylcnc 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.08 73.2% 2-144 MS ug/L 33.47 58.5% 17-128 (SP 1916583-004) MSD ug/L 33.47 60.8% 17-128 MSRPD ug/L 33.33 3.90/a <30 625 12/16/19:219544SBL CCV I m L 20.00 99.7% 1 80-120 Benzo(k)fluoranthenc 625 12/10/19:214089caa Blank I ug/L ND <1 LCs ug/L 20.09 77.9% 11-133 MS ug/L 33.48 64.6% 27-124 (SP 1916583-004) MSD ug/L 33.48 72.6% 27-124 MSRPD ug/L 33.33 11.5% <30 625 12/16/19:219544SBL CCV rngIL 20.00 97.6% 80-120 [is(2-ChIorocthoxy)rncthane 625 12/10/19:214089caa Blank ug/L ND <l LCS ug/L 20.00 59.3% 0-142 MS ug/L 33.33 24.4% 30-130 435 (SP 1916583-004) MSD ug/L 33.33 82.8% 30-130 MSRPD ug/L 33.33 109% <30 435 625 12/16/19:219544SBL CCV m L 20.00 100% 80-120 is(2-Chloroethyl)cther 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.00 44.7% 0-139 MS ug/L 33.33 17.9% 25-138 4"' (SP 1916583-004) MSD ug/L 33.33 74.5% 25-138 MSRPD ue'L 33.33 123% <30 435 625 12/16/19:219544SBL CCV ma L 20.00 90.9% 80-120 his(2-Chloroisopropyl)ether 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/l. 20.00 29.6% 0-I19 Ms ug/L 33.33 13.1% 20-117 435 (SP 1916583-004) MSD ug/L 33.33 48.6% 20-117 MSRPD ugfL 33.33 115% <30 435 625 12/16/19:219544SBL CCV m 20.00 81.09, 80-120 is(2-Ethylhexyl)phthalate 625 12/10/19:214089eaa Blank ug/L ND <2 LCS ug/L 20.00 87.9°m 0-159 MS ug/L 33.33 79.4 IN 0-145 (SP 1916583-004) MSD ug/L 33.33 85.8 9 0-145 MSRPD u 33.33 7.4% <30 625 12/16/19:219544SBL CCV m 20.00 101% 80-120 Butylbenzylphthalate 625 12/10/19:214089caa Blank ug/L ND <2 LCS ug/L 20.00 88.3% 0-72 Ms ug(L 33.33 81.2% 0-153 (SP 1916583-004) MSD ug(L 33.33 91.7% 0-153 MSRPD ugfL 33.33 12.1% <_30 625 12/16/19:219544SBL CCV mgfL 20.00 110% 80-120 'hloronaphthalenc 625 12/10/19:214089caa Blank ug/L ND <1 LCs ug(L 20.00 47.5% 0-140 MS ug/L 33.33 21.2% 28-119 (SP 1916583-004) MSD ug/L 33.33 76.4% 28-119 MSRPD u L 33.33 Ili% <30 435 625 12/16/19:219544SBL CCV m 20.00 99.5% 80. Page 31 of 41 January 13,2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Constituent Method Date/ID Type Cnits one. QC Data DQO Note Organic 'hlorophenylphenylether 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.00 68.0% 1-139 MS ug(L 33.33 38.6% 33-120 (SP 1916583-004) MSD ug/L 33.33 81.1% 33-120 MSRPD ug/L 33.33 70.9% :530 435 h 12/16/19:219544SBL CCV m,e I 20.00 106% 80-120 c hn�cn� 625 12/10/19:214089caa Blank Up ND <i LCS ug/L 20.02 80.1% 4-144 MS ug/L 33.37 66.8% 27-128 (SP 1916583-004) MSD ug/L 33.37 77.2% 27-128 MSRPD a 33.33 14.40/a <30 625 12/16/19:219544SBL CCV I m L 20.00 98.9% 80-120 Dibcnzo(a.h)anthraccnc 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.01 77.9% 5-156 MS ug/L 33.35 60.7% 26-136 (SP 1916583-004) MSD ug/L 33.35 62.3% 26-136 MSRPD ugfL 33.33 2.7% <30 625 12/16/19:219544SBL CCV mgfL 20.00 100% 1 80-120 Dicth�lphthalatc 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.00 84.8% 25-126 Ms ug/L 33.33 57.1% 0-147 (SP 1916583-004) MSD ug/L 33.33 82.9% 0-147 MSRPD u 33.33 36.9% <30 i 625 12/16119:219544SBL CCV m 20.00 1 102% 80-120 Dimethylphthalate 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.00 83.2% 29-116 Ms ug/L 33.33 50.8% 0-137 (SP 1916583-004) MSD ug/L 33.33 83.8% 0-137 MSRPD u 33.33 49.1% <30 435 625 12/16/19:219544SBL CCV m 20.00 106% 80-120 Di-n-butylphthalate 625 12/10/19:214089caa Blank ug/L ND <2 LCS ug/L 20.00 89.2% 1-87 MS ug/L 33.33 66.5% 26-141 (SP 1916583-004) MSD ug/L 33.33 86.9% 26-141 MSRPD ug/L 33.33 26.4% <30 625 12/16/19:219544SBL CCV m 20.00 97.0% 80-120 Di-noctylphthalate 625 12/10/19:214089caa Blank ug/L, ND <1 LCS ug/L 20.00 95.8% 0-162 MS ug/L 33.33 93.6% 29-144 (SP 1916583-004) MSD ug/L. 33.33 111% 29-144 MSRPD u 33.33 16.6% <30 625 12/16/19:219544SBL CCV m 20.00 106% 80-120 Fluoranthwe 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug(L 20.06 83.5% 1-148 Ms ug/L 33.43 60.6% 48-126 (SP 1916583-004) MSD 119/1. 33.43 82.3% 48-126 MSRPD u 33.33 30.4% <30 435 625 12/16(19:219544SBL CCV m 20.00 103% 80-120 luorenc 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.01 64.6% 0-141 MS ug/L 33.35 36.5% 38-123 435 (SP 1916583-004) MSD ug/L 33.35 81.1% 38-123 MSRPD u 33.33 75.8 a <30 435 625 12/16/19:219544SBL CCV m L 20.00 102% 80-120 Page 32 of 41 January 13, 2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control - Organic Constituent Method Date'ID Type Units Conc. QC Data DQO 'sole Organic Ilexachlorobenzene 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.00 76.0% 0-150 MS ug/L 33.33 42.3% 30-121 (SP 1916583-004) MSD u9/1. 33.33 84.7% 30-121 MSRPD u 33.33 66.9% <30 4 12/16/19:219544SBL CCV m L 20.00 I l6% 80-120 Ilcxachlorobutadiene 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.00 24.0% 1-93 MS ug/L 33.33 9.8% 15-90 435 (SP 1916583-004) MSD ug/L 33.33 37.4% 15-90 MSRPD ugfL 33.33 117% :530 435 625 12/16/19:219544SBL CCV m 20.00 115% 80-120 Ilexachlorocyclopentadiene 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.00 11.6% 0-66 MS ug/L 33.33 2.5% 0-55 (SP 1916583-004) MSD ug/L 33.33 25.2% 0-55 MSRPD ug/L 33.33 7.6 <l 435 625 12/16/19:219544SBL CCV m 20.00 106% 80-120 Itexachloroethane 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.00 21.8% 0-101 MS ug/L 33.33 9.0% 8-107 (SP 1916583-004) MSD 119/1. 33.33 40.6% 8-107 MSRPD ugfL 33.33 128% <30 435 625 12/16/19:219544SBL CCV m 20.00 89.2% 80-120 Indeno(1,2,3c,d)py cnc '5 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.08 79.5% 0-160 MS ug/L 33.47 65.0% 26-146 (SP 1916583-004) MSD ug/L 33.47 65.2% 26-146 MSRPD u 33.33 0.3% <30 n' 12/16119:219544SBL CCV m 20.00 102% 80-120 I;ophoronc 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.00 66.9% 1-142 MS ug/L 33.33 23.7% 35-124 435 (SP 1916583-004) MSD ug/L 33.33 79.1% 35-124 MSRPD u L 33.33 108% <30 435 625 12/16/19:219544SBL CCV m 20.00 97.1% 80-120 Naphthalene 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.01 45.0% 0-134 MS ug/L 33.35 17.3% 28-122 4 (SP 1916583-004) MSD ug/L 33.35 79.3% 28-122 MSRPD ug/L 33.33 128% <30 4;; 625 12/16/19:219544SBL CCV m L 20.00 99.4% 80-120 Nitrobenzene 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.00 46.1% 0-136 MS ug/L 33.33 16.8% 37-119 435 (SP 1916583-004) MSD ug/L 33.33 71.5% 37-119 MSRPD ug/L 33.33 124% <30 435 625 12/16/19:219544SBL CCV m L 20.00 96.4% 80-120 itrobenzene-0 625 12/10/19:214089caa Blank ug/L 10.00 7.3% 24-98 LCS ug/L 10.00 43.9% 24-98 MS ug/L 16.67 15.6% 24-98 435 (SP 1916583-004) MSD ug/L 16.67 69.0% 24-98 MSRPD u 33.33 126% <30 435 12/16/19:219544SBL CCV Ma 10.00 L I % 80-120 Page 33 of 41 January 13, 2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control - Organic Constituent N1011od Date/ID Type unite Cone. QC Data DQO Note Organic N-Nitrosodimethylaminc I_10/19:214089caa Blank ug/L ND <2 LCS ug/L 20.00 37.6% 0-167 MS ug/L 33.33 9.2% 23-129 435 (SP 1916583-004) MSD ug/L 33.33 61.0% 23-129 MSRPD I ua/L 33.33 147% 1 <30 435 625 12/16/19:219544SBL CCV n,, 1 20.00 91.8% 80-120 N-Nitrosodi-N-propylamine 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.00 51.9% 0-132 MS ug/L 33.33 18.6% 30-124 (SP 1916583-004) MSD ug/L 33.33 73.5% 30-124 MSRPD u 33.33 119°/u <30 4 12/16/19:219544SBL CCV m 20.00 92.5% 80-120 Nitrosodiphcnylaminc 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.00 92.0% 0-164 MS ug/L 33.33 8.9% 34-127 435 (SP 1916583-004) MSD ug/L 33.33 17.7% 34-127 435 MSRPD u 33.33 2.9 <1 435 625 12/16119:219544SBL CCV m 20.00 106% 80-120 p-Chloro-mcresol 62_5 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.08 47.6% 0-150 MS ug/L 33.47 30.6% 35-142 435 (SP 1916583-004) MSD ug/L 33.47 87.8% 35-142 MSRPD ugfL 33.33 96.7% <30 435 625 12/16119:219544SBL CCV ingfL 20.00 114% 80-120 Pentachlorophenol 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.10 63.9% 0-202 Ms ug/L 33.50 24.1% 20-166 (SP 1916583-004) MSD ug/L 33.50 63.5% 20-166 MSRPD ugfL 33.33 90.1% <30 a�, 625 12/16119:219544SBL CCV mgfL 20.00 90.1% 80-120 Phenanthrene 625 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.06 71.6% 3-138 MS ug/L 33.43 47.8% 44-120 (SP 1916583-004) MSD ug/L 33.43 73.8% 44-120 MSRPD u 33.33 42.7% <30 12/16119:219544SBL CCV m 20.00 94.1% 80-120 Phenol '� 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.09 14.1% 0-137 MS ug/L 33.48 8.6% 28-130 i (SP 1916583-004) MSD ug/L 33.48 68.1% 28-130 MSRPD u 33.33 155% <30 !;, 625 12/16/19:219544SBL CCV mgfL 20.00 97.5% 80-120 Phenol-d6 625 12/10/19:214089caa Blank ug/L 20.00 0.6% 10-120 LCS ug/L 20.00 13.8% 10-120 Ms ug/L 33.33 7.8% 10-120 435 (SP 1916583-004) MSD ug/L 33.33 64.5% 10-120 MSRPD u >;.33 157% S30 -1 625 12/16/19:219544SBL CCV mgfL 20.00 101% 80-120 p-Terphenyl-d14 625 12/10/19:214089caa Blank ug/L 10.00 48.9% 20-103 LCS ug/L 10.00 83.9% 20-103 Ms ug/L 16.67 31.6% 20-103 (SP 1916583-004) MSD ug/1. 16.67 44.8% 20-103 MSRPD It 33.33 34.6% <30 435 625 12/16/19:219544SBL CCV m 10.00 117% 80-120 Page 34 of 41 January 13, 2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control - Organic Constituent Method Date/ID Type Cnits one. QC Data DQO Note Organic Pcrcnc '> 12/10/19:214089caa Blank ug/L ND <1 LCS ug/L 20.06 79.3% 6-141 MS ug/L 33.43 58.7% 42-120 (SP 1916583-004) MSD ug/L 33.43 76.5% 42-120 MSRPD ug/L 33.33 26.3% 530 625 12/16119:219544SBL CCV m L 20.00 102% 80-120 Pyridine 625 12/10/19:214089eaa Blank ug/L ND <1 LCS ug/L 20.00 53.9% 0-84 MS ug/L 33.33 18.8% 0-99 (SP 1916583-004) MSD ug/L 33.33 64.1% 0-99 MSRPD ugfL 33.33 109% <30 625 12/16/19:219544SBL CCV m L 20.00 96.3% 80-120 1.1.1.2-Tetrachloroethane 8260E 12/13/19:219578VRG CCV ug/L 25.00 93.0% 70-130 I,l,l-Trichloroctllane(TCA) 8260B 12/13/19:219578VRG CCV ug/L 25.00 104% 70-130 1,1,2,2-Tetrachlorcethane 8260B 12/13/19:219578VRG CCV ug/L 25.00 89.8% 70-130 1,1,2-Trichloroethanc 8260B 12/13/19:219578VRG CCV ug/L 25.00 99.9% 70-130 1.1-Dichloroethanc 8260B 12/13/19:219578VRG CCV ug/L 25.00 125% 70-130 I.I-Dichloroeth lenc 8260B 12/13/19:219578VRG CCV ug/L 25.00 105% 80-120 1.1-Dichloro ro ene 8260B 12/13/19:219578VRG CCV ug/L 25.00 104% 70-130 1.2.3-Trichlorobcnzcne 8260B 12/13/19:219578VRG CCV ug/L 25.00 38.2% 70-130 380 I_2.4-Trichlorobenzene 8260E 12/13/19:219578VRG CCV ug/L 25.00 74.0% 70-130 1,2,4-Trimeth lbenzene 8260B 12/13/19:219578VRG CCV ugIL 25.00 103% 70-130 1.2-Dichlorobenzene 8260B 12/13/19:219578VRG CCV ug/L 25.00 102% 70-130 1.2-Dichloroethane(EDC) 8260B 12/13/19:219578VRG CCV ug/L 1 25.00 110% 70-130 1,2-Dichloroethaned4 8260B 12/13/19:219578VRG CCV ug/L 1 25.00 112% 70-130 1,2-Dichloro ro anc 8260B 12/13/19:219578VRG CCV ug/L 1 25.00 119% 80-120 1,3,5-Trimeth (benzene 8260B 12/13/19:219578VRG CCV ug/L 25.00 101% 70-130 1,3-Dichlorobenzene 8260B 12/13/19:219578VRG CCV ug/L 25.00 98.7% 70-130 13-Dichloro ro auc 8260B 12/13/19:219578VRG CCV u 25.00 112% 70-130 1.4-Dichlorobenzene 8260B 12/13/19:219578VRG CCV ug/L 25.00 99.3% 70-130 2,2-Dichloro ro anc 8260B 12/13/19:219578VRG CCV ug/L 25.00 112% 70-130 2-Butanone(MEK) 8260E 12/13/19:219578VRG CCV ug/L 200.0 100% 50-150 8260E 12/20/19:219722VRG CCV ug/L 153.8 104% 50-150 '--Chlorotolucne 8260B 12/13/19:219578VRG CCV ug/L 25.00 103% 70-130 2-Hexanone 8260E 12/13/19:219578VRG CCV ugIL 200.0 87.6% 50-150 Bromofluorobcnzene BFB 8260E 12/13/19:219578VRG CCV ug/L 25.00 102% 70-130 Chlorotoluene 8260B 12113/19:219578VRG CCV ug/L 25.00 103% 70-130 Meth I-2- tanone IBK) 8260E 12/13/19:219578VRG CCV ug/L 200.0 99.4% 50-150 Acetone 8260E 12/13/19:219578VRG CCV ug/L 200.0 123% 50-150 8260E 12/20/19:219722VRG CCV ug/L 153.8 126% 50-150 crolein 8260B 12/13/19:219578VRG CCV ug/L 100.0 164% 50-150 360 Acrylonitrile 8260B 12/13/19:219578VRG CCV u 100.0 255% 50-150 360 Benzene 8260B 12/13/19:219578VRG CCV ug/L 25.00 109% 70-130 romobenzene 8260E 12/13/19:219578VRG CCV ugIL 25.00 89.1% 70-130 Bromochloromethane 8260B 12/13/19:219578VRG CCV ugIL 25.00 113% 70-130 Bromodichloromethane 8260B 12/13/19:219578VRG CCV ug/L 25.00 104% 70-130 Bromoform 8260B 12/13/19:219578VRG CCV u 25.00 113% 70-130 Bromomethane(Methyl Bromide) 8260B 12/13/19:219578VRG CCV ug/L 25.00 s3.4% 70-130 Carbon Disulfide 8260B 12/13/19:219578VRG CCV ug/L 200.0 52.6% 50-150 [arbon Tetrachloride 8260B 12/13/19:219578VRG CCV u 25.00 85.8% 70-130 hlorobcnzenc 82608 12/13/19:219578VRG CCV ug/L 25.00 103% 70-130 hlorocthane(Ethyl Chloride 8260B 12/13/19:219578VRG CCV I u,1 25.00 1 75% 1 70-130 hlorofonn 8260B 12/13/19:219578VRG CCV 1 1 25.00 1 113% 1 80-120 Page 3 of 41 January 13, 2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control - Organic Constituent XIethod DateAD T.Npe I nits Conc. QC Data DQ01 Aote Organic hloromethane(Meth 1 Chloride) 8260B 12/13/19:219578VRG CCV u L 25.00 90.0% 70-130 is-1,2-Dichloroeth lene 8260B 12/13/19:219578VRG CCV u L 25.00 128% 70-130 is-1,3-Dichloro ro enc 8260E 12/13/19:219578VRG CCV u L 25.00 111% 70-130 Dibromochloromethane 8260E 12/13/19:219578VRG CCV u L 25.00 104% 70-130 Dibromofluromcthanc 8260B 12/13/19:219578VRG CCV u L 25.00 107% 70-130 Dibromomethanc 8260E 12/13/19:219578VRG CCV u L 25.00 97.9% 70-130 Dichlorodifluoromethane 8260B 12/13/19:219578VRG CCV u L 25.00 28.2% 70-130 n Dichloromethane 8260B 12/13/19:219578VRG CCV u L 25.00 123% 70-130 Ethyl tw-Butyl Ether 8260B 12/13/19:219578VRG CCV u L 25.00 137% 50-150 Eth lbenzene 8260B 12/13/19:219578VRG CCV u L 25.00 108% 80-120 Hexachlorobutadiene 8260B 12/13/19:219578VRG CCV u L 25.00 87.4% 70-130 Isopropyl Ether 8260E 12/13/19:219578VRG CCV u L 25.00 180% 50-150 360 Isopropylbenzene 8260B 12/13/19:219578VRG CCV u L 25.00 102% 70-130 Methyl tort-Butyl Ether 8260B 12/13/19:219578VRG CCV u 25.00 139% 70-130 360 Naphthalene 8260B 12/13/19:219578VRG CCV ugIL 25.00 68.7% 70-130 380 n-Butylbenzene 8260B 12/13/19:219578VRG CCV u L 25.00 107% 70-130 n-Propylbenzcne 8260B 12/13/19:219578VRG CCV u L 25.00 113% 70-130 Iso rop ltoluene 8260E 12/13/19:219578VRG CCV u L 25.00 101% 70-130 scc-Butylbenzene 8260B 12/13/19:219578VRG CCV u L 25.00 103% 70-130 Styrene 8260B 12/13/19:219578VRG CCV u L 25.00 99.4% 70-130 TAME 8260B 12/13/19:219578VRG CCV u 25.00 117% 50-150 crt-Butanol 8260B 12/13/19:219578VRG CCV u 125.0 179% 50-150 360 tert-Butylbenzene 8260B 12/13/19:219578VRG CCV u L 25.00 87.3% 70-130 ctrachloroeth lene PCE) 8260B 12/13/19:219578VRG CCV u 25.00 84.8% 70-130 Toluene 8260B 12/13/19:219578VRG CCV u L 25.00 104% 80-120 Toluene-d8 8260B 12/13/19:219578VRG CCV u L 25.00 101% 70-130 trans-l,2-Dichloroeth lent 8260B 12/13/19:219578VRG CCV u L 25.00 115% 70-130 trans-l,3-Dichloro ro cne 8260B 12/13/19:219578VRG CCV u L 25.00 114% 70-130 richloroeth lone TCE) 8260B 12/13/19:219578VRG CCV u L 25.00 96.5% 70-130 richlorofluoromethane F-11 8260B 12/13/19:219578VRG CCV u L 25.00 72.4% 70-130 Vinyl Acetate 8260B 12/13/19:219578VRG CCV u L 200.0 95.4% 50-150 Vinyl Chloride 8260B 12/13/19:219578VRG CCV u L 25.00 84.4% 80-120 lene m,p 8260B 12/13/19:219578VRG CCV ug/L 50.00 101% 70-130 lens o 8160B 12/13/19:219578VRG CCV L 25.00 103% 70-130 1,2,4-Trichlorobenzene 8270C 12/16/19:214374caa Blank mg/kg ND <0.5 LCS mg/kg 0.5000 53.6% 9-97 Ms mg/kg 0.5000 28.9% 0-105 (STK1957920-001) MSD tttg/kg 0.5000 28.8% 0-105 MSRPD I ingfkg 1.000 0.00056 1 <0.5 8270C 12/18/19:219663SBL CCV m L 20.00 107% 70-130 1,2-Dichlorobenzene 8270C 12/16/19:214374caa Blank -gfkg ND <0.5 8270C 12/18/19:219663SBL CCV rng1L 20.00 96.6% 70-130 1,2-Di hen lh drazine 8270C 12/16/19:214374caa Blank nig1kg ND <0.5 1,3-Dichlorobenzene 8270C 12/16/19:214374caa Blank m ND <0.5 8270C 12/18/19:219663SBL CCV m L 20.00 96.5% 70-130 1,4-Dichlorobenzene 8270C 12/16/19:214374caa Blank mg/kg ND <0.5 LCS mg/kg 0.5000 42.2% 10-88 Ms mg/kg 0.5000 24.1% 0-102 (STK1957920-001) MSD mg/kg 0.5000 24.3% 0-102 MSRPD I rng1kg 1.000 0.0011 _<0.5 8270C 12/18/19:219663SBL CCV m 20.00 95.1% 80-1 10 2,3,4,6-Tetrachlorophenol 8270C 12/16/19:214374caa Blank nigfkg ND <1 8270C 12/18/19:219663SBI CCV m 10.00 197% 70-130 U Page 36 of 41 January 13, 2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control - Organic Constituent Method Date/ID Type Lnits Conc. QC Data DQO Nutc Organic 2,4,5-Trichlorophenol 8270( 12/16/19:214374caa Blank mgfkg ND <1 8270C 12/18/19:219663SBL CCV m L 20.00 118% 70-130 2.4,6-Tribromophenol 8270C 12/16/19:214374caa Blank mg/kg 1.000 67.3% 0-100 LCS mg/kg 1.000 61.5% 0-100 MS mg/kg 1.000 35.5% N/A (STK1957920-001) MSD mg/kg 1.000 35.2% N/A MSRPD m 1.000 0.0028 <1 8270C 12/18/19:219663SBL CCV to L 20.00 110% 70-130 2.4,6-Trichlorophenol 8270C 12/16/19:214374caa Blank ma k, ND <1 8270C 12/18/19:219663SBL CCV m L 'QOo 119% 80-120 2,4-Dichlorophenol 8270C 12/16/19:214374caa Blank m ND <l 8270C 12/18/19:219663SBL CCV m L 20.00 119% 80-120 2.4-Dimethylphcnol 8270C 12/16/19:214374caa Blank m ND <I 8270C 12/18/19:219663SBL CCV m L 20.00 103% 70-130 '.4-DinitrophenoI 8270C 12/16/19:214374caa Blank m ND <1 8270C 12/18/19:219663SBL CCV m 20.00 117% 70-130 1-DI niuotoluenc 8270C 12/16/19:214374caa Blank mg/kg ND <0.5 LCS mg/kg 0.5000 49.5% 2-95 MS mg/kg 0.5000 29.0% 0-112 (STK1957920-001) MSD mg/kg 0.5000 29.6% 0-112 MSRPD m 1.000 0.0028 <_0.5 8270C 12/18/19:219663SBL CCV m 20.00 104% 70-130 2,6-Dinitrotoluene 8270C 12/16/19:214374caa Blank m ND <0.5 8270C 12/18/19:219663SBL CCV m 20.00 121% 70-130 '-Chlorophenol 8270C I2/16/19:214374caa Blank mg/kg ND <1 LCS mg/kg 1.000 47.3% 8-100 MS mg/kg 1.000 24.0% 0-113 (STK1957920-001) MSD mg/kg 1.000 23.0% 0-113 MSRPD I m 1.000 0.010 1 <1 8270C 12/18/19:219663SBL CCV m 20.00 96.4% 70-130 2-Fluorobiphenyl 8270C 12/16/19:214374caa Blank mg/kg 0.5000 61.0% 2-90 LCS mg/kg 0.5000 51.9% 2-90 MS mg/kg 0.5000 26.7% N/A (STK1957920-001) MSD mg/kg 0.5000 26.7% N/A MSRPD m 1.000 0.00010 <_0.5 >'-oc 12/18/19:219663SBL CCV mgfL 10.00 114% 70-130 2-Fluorophenol 8270C 12/16/19:214374caa Blank mg/kg 1.000 47.5% 4-79 LCS mg/kg 1.000 40.7% 4-79 MS mg/kg 1.000 20.8% N/A (STK1957920-001) MSD mg/kg 1.000 20.1% N/A MSRPD m 1.000 0.0070 <0.5 8270C 12/19119:219663SBL CCV I mgfL 20.00 100% 70-130 2-Methylnaphthalene 8270C 12/16/19:214374caa Blank mgfkg ND <0.5 8270C 12/18/19:219663SBL CCV mgfL 20.00 74.5% 50-150 '-Methylphenol 8270C 12/16/19:214374caa Blank m ND <1 8270C 12/18/19:219663SBL CCV nigfL 20.00 90.8% 70-130 Nitroaniline 8270C 12/16/19:214374caa Blank iiigfkg I ND <l 8270C 12118119:219663SBL CCV to 20.00 62.9% 50-150 2-Nitrophenol 8270C 12/16/19:214374caa Blank -gfkg ND <I 8270C 12/18/19:219663SBL CCV m 20.0o 112% 80-120 3.3-Dichlorobenzidine 8270C 12/16/19:214374caa Blank m ND <0.5 8270C 12/18/19:219663SBL CCV m 20.00 183% 50-150 360 3-Nitroundine 8270C 12/16/19:214374caa Blank m g I IND <I 8270C 12/18/19:219663SBL CCV rn&j 1 20.00 1 94.0% 1 50-150 Page 37 of 41 January 13, 2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control - Organic Constituent Method Date/ID Tvpe l nits Cone. QC Data DQO \utr Organic 4.6-Dinitro-2-methylphenol 8270C 12/16/19:214374caa Blank mg/kg SI) <I 4.6-Dinitro-o-crcsol 8270C 12/18/19:219663SBL CCV in L 20.00 107 70-130 Bromophenylphenylether 8270C 12/16/19:214374caa Blank nig/kg ND <0.5 8270C 12/18/19:219663SBL CCV m L 20.00 113% 70-130 Chloro-3-methylphenol 8270C 12/16/19:214374caa Blank mg/kg ND <1 LCS mg/kg 1.000 61.8% 7-117 MS mg/kg 1.000 35.2% 0-120 (STK1957920-001) MSD mg/kg 1.000 35.9% 0-120 MSRPD mglkg 1.000 0.0072 <1 Chloroaniline 8270C 12/16/19:214374caa Blank Mg/kg Mg/kg ND <0.5 8270C 12/18/19:219663SBL CCV m L 20.00 1 113% 50-150 Methylphenol 8270C 12/16/19:214374caa Blank mg/kg ND <1 8270C 12/18/19:219663SBL CCV m L 20.00 83.7°, 70-130 Nitroaniline 8270C 12/16/19:214374caa Blank mgfkg ND <1 8270C 12/18/19:219663SBL CCV m L 20.00 75.5% 50-150 Nitrophenol 8270C 12/16/19:214374caa Blank mg/kg ND <1 LCS mg/kg 1.000 57.2% 0-137 MS mg/kg 1.000 50.6% 0-122 (STK1957920-001) MSD mg/kg 1.000 47.7% 0-122 MSRPD I me k_-, 1.000 0.029 <1 8270C 12/18/19:219663SBL CCV nn,L '0.00 91.4% 70-130 cenaphthene 8270C 12/16/19:214374caa Blank mg/kg ND <0.5 LCS mg/kg 0.5000 54.7% 10-101 Ms mg/kg 0.5000 30.7% 0-108 (STK1957920-001) MSD mg/kg 0.5000 30.9% 0-108 MSRPD mgfke 1.000 0.00094 <0.5 8270C 12/18/19:219663SBL CCV nigfL 20.00 96.9% 80-120 Acenaphthvlcne 8270C I2/16/19:214374caa Blank m ND <0.5 8270C 12/18119:219663SBL CCV mgfL 20.00 98.3% 70-1 3n Aniline 8270C 12/16/19:214374caa Blank in ND <1 8270C 12/18/19:219663SBL CCV mgfL 20.00 80.2% 50-150 Anthracene 8270C 12/16/19:214374caa Blank m ND <0.5 8270C 12/18/19:219663SBL CCV mgfL 20.00 97.0% 70-130 Azobenzene 8270C 12/18/19:219663SBL CCV m L 20.00 99.9% 70-130 Bcnzidine 8270C 12/16/19:214374caa Blank nt ND <1 8270C 12118/19:219663SBL CCV ingfL 20.00 174% 50-150 Benzo(a)anthracene 8270C 12/16/19:214374caa Blank mgNg ND <0.5 8270C 12/18/19:219663SBL CCV nt 20.00 109% 70-130 Benzo(a)pyrene 8270C 12/16/19:214374caa Blank m ND <0.5 8270C 12/18/19:219663SBL CCV in 20.00 101% 80-120 Benzo(b)fluoranthcnc 8270C 12/16/19:214374caa Blank m ND <0.5 8270C 12/18/19:219663SBL CCV nt 20.00 99.6% 70-130 Bcnzo(g,h,i)perylene 8270C 12/16/19:214374caa Blank m ND <0.5 8270C 12/18/19:219663SBL CCV m 20.00 105% 70-130 Benzo(k)fluoranthene 8270C 12/16/19:214374caa Blank in ND <0.5 8270C 12/18/19:219663SBL CCV m L 20.00 94.1% 70-130 Benzoic Acid 8270C 12/16/19:214374caa Blank m ND <1 8270C 12/18/19:219663SBL CCV m 20.00 102% 70-130 Benzylalcohol 8270C 12/16/19:214374caa Blank m ND I <1 8270C 12/18/19:219663SBL CCV mg1l, 20.00 62.2% 70-130 380 is(2-Chloroethoxy)methane 8270C 12/16/19:214374caa Blank m ND <0.5 8270C 12/18/19:219663SBL CCV m 20.00 99.2% 70-130 is(2-Chloroethyl)ether 8270C 12/16/19:214374caa Blank m ND <0.5 Page 38 of 41 January 13, 2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control - Organic Constituent Method WWII) Type Units Conc. QC Data DQO Note Organic is(2-Chloroeth 1)ether 8270C 12/18/19:219663SBL CCV m L 20.00 87.9% 70-130 is(2-Chloroisopropyl)cthcr 8270C 12/16/19:214374caa Blank mgikg ND <0.5 8270C 12/18/19:219663SBL CCV m L 20.00 79.1% 70-130 s(2-Etltylhcxyl)phthalate 8270C 12/16/19:214374caa Blank m ND <0.5 8270C 12/18/19:219663SBL CCV m L 20.00 97.3% 70-130 Butylbenzylphthalate 8270C 12/16/19:214374caa Blank mglkg ND <0.5 8270C 12/18/19:219663SBL CCV m L _t1.00 106% 70-130 Chloronaphthalcne 8270C 12/16/19:214374caa Blank mglkg ND <0.5 8270C 12/18/19:219663SBL CCV m L 20.00 99.8% 70-130 'hlorophenylphenylether 8270C 12/16/19:214374caa Blank m ND <0.5 8270C 12/18/19:219663SBL CCV m L 20.00 105% 70-130 hrysenc 8270C 12/16/19:214374caa Blank mglkg ND <0.5 8270C 12/18/19:219663SBL CCV m 20.00 98.5% 70-130 Dibenzo(a,h)anthracene 8270C 12/16/19:214374caa Blank mgfkg ND <0.5 8270C 12/19119:219663SBL CCV m 20.00 104% 70-130 Dibenzofuran 8270C 12/16/19:214374caa Blank mgfkg ND <1 8270C 12118/19:219663SBL CCV mgfL 20.00 75.1% 50-150 Dicthylphthalate 8270C 12/16/19:214374caa Blank mgfkg ND <0.5 8270C 12/18/19:219663SBL CCV mgfL 20.00 103% 70-130 Dimethylphthalate 8270C 12/16/19:214374caa Blank mglkg ND <0.5 8270C 12/18/19:21%63SBL CCV m 20.00 107% 70-130 Di-n-butylphthalate 8270C 12/16/19:214374caa Blank m ND <0.5 8270C 12/18/19:219663SBL CCV nigfL 20.00 96.7% 70-130 Di-n-"Iphthalate 8270C 12/16/19:214374caa Blank in ND <0.5 8270C 12/18/19:219663SBL CCV in 20.00 102% 80-120 Fluoranthene 8270C 12/16/19:214374caa Blank In ND <0.5 8270C 12/18/19:219663SBL CCV m L 20.00 106% 80-120 Fluorene 8270C 12/16/19:214374caa Blank ingAg ND <0.5 8270C 12/18/19:219663SBL CCV m L 20.00 102% 70-130 1lexachlorobenzene 8270C 12/16/19:214374caa Blank iiigfkg ND <0.5 8270C 12/18/19:219663SBL CCV m 20.00 114% 70-130 1lexachlorobutadiene 8270C 12/16/19:214374caa Blank m ND <0.5 8270C 12/18/19:219663SBL CCV m L 20.00 115% 80-120 1lexachlorocyclopentadiene 8270C 12/16/19:214374caa Blank nigAg ND <0.5 8270C 12118/19:219663SBL CCV in 20.00 107% 70-130 1lexachloroethane 8270C 12/16/19:214374caa Blank nt ND <0.5 8270C 12/18/19:219663SBL CCV in 20.00 88.4% 70-130 Indcno(1,2,3-c,d)pyrcne 8270C 12/16/19:214374caa Blank 111gfkg ND <0.5 8270C 12/18/19:219663SBL CCV ingfl, 20.00 111% 70-130 l,ophorone 8270C 12/16/19:214374caa Blank ingfkg ND <0.5 8270C 12/18/19:219663SBL CCV ingfi, 20.00 84.5% 70-130 Naphthalene 8270C 12/16/19:214374caa Blank m ND <0.5 8270C 12/18/19:219663SBL CCV in 20.00 100% 70-130 Nitrobenzene 8270C 12/16/19:214374caa Blank m ND <0.5 8270C 12/18/19:219663SBL CCV m 20.00 88.5% 70-130 itrobenzene-d5 8270C 12/16/19:214374caa Blank ntg/kg 0.5000 50.0% 1-88 LCS mg/kg 0.5000 42.6% 1-88 MS ng/kg 0.5000 23.9% N/A (STK1957920-001) MSD ntg/kg 0.5000 21.4% N/A MSRPD I m 1000 0.012 1 _<0.5 8270C 12/18/19:219663SBL I CCV m 1 n()0 98.5% 1 70-130 N-Nitrosodimethylamine 8270C 12/16/19:214374caa Blank m ND <0.5 8270C 12 18'19:219663SBL CCV ntg,L 20.00 91.9 70-130 Page 39 of 4l January 13, 2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control - Organic Constituent Method Date/ID T}pe ('nits one. QC Data DQO Autc Organic N-Nitrosodi-N-propylamine 8270C 12/16/19:214374caa Blank mg/kg ND <0.5 LCS ntg/kg 0.5000 44.5% 7-94 MS ntg/kg 0.5000 24.4% 0-154 (STK1957920-001) MSD ntg/kg 0.5000 23.5% 0-154 MSRPD m 1.000 0.0042 <_0.5 8270C 12/18/19:219663SBL CCV m L 20.00 80.5% 70-130 N-Nitrosodiphenylaminc 8270C 12/16/19:214374caa Blank m ND <0.5 8270C 12/18/19:219663SBL CCV m L 20.00 97.9% 80-120 Chloro-m-cresol 8270C 12/18/19:21%63SBL CCV m L 20.00 107% 80-120 Pentachlorophenol 8270C 12/16/19:214374caa Blank mg/kg ND <1 LCS mg/kg 1.000 53.5% 9-119 MS mg/kg 1.000 38.1% 0-113 (STK1957920-001) MSD mg/kg 1.000 37.4% 0-113 MSRPD mg/kg 1.000 0.0066 1 <1 8270C 12/18/19:219663SBL CCV m 20.00 90.2% 80-120 Phenanthrene 8270C 12/16/19:214374caa Blank m ND <0.5 8270C 12/18/19:21%63SBL CCV m 20.00 94.2% 70-130 Phenol 8270C 12/16/19:214374caa Blank mg/kg ND <1 LCS mg/kg 1.000 45.5% 5-103 MS mg/kg 1.000 22.7% 0-125 (STK1957920-001) MSD mg/kg 1.000 21.3% 0-125 MSRPD I m 1.000 0.015 1 <1 8270C 12/18/19:219663SBL CCV mgfL 20.00 89.2% 80-120 Phenol-d6 8270C 12/16/19:214374caa Blank mg/kg 1.000 54.3% 0-85 LCS mg/kg 1.000 45.9% 0-85 MS mg/kg 1.000 22.4% N/A (STK1957920-001) MSD mg/kg 1.000 20.6% N/A MSRPD m 1.000 0.018 <_0.5 8270C 12/18/19:219663SBL CCV m 20.00 92.4% 70-130 p-Terphenyl-dl4 8270C 12/16/19:214374caa Blank mg/kg 0.5000 77.6% 0-79 LCS mg/kg 0.5000 67.8% 0-79 MS mg/kg 0.5000 31.6% N/A (STK1957920.001) MSD mg/kg 0.5000 33.1% N/A MSRPD m 1.000 0.0077 <_0.5 8270C 12/19/19:219663SBL CCV m 10.00 114% 70-130 P\rcn 8270C 12/16/19:214374caa Blank mg/kg ND <0.5 LCS mg/kg 0.5000 71.8% 15-127 MS mg/kg 0.5000 36.0% 0-135 (STK1957920-001) MSD mg/kg 0.5000 37.8% 0-135 MSRPD mgfkg 1.000 0.0092 <_0.5 8270C 12/18/19:2196632L CCV mg1l, 20.00 99.6% 70-130 Pcridine 8270C 12/16/19:214374c7 Blank ntg/kg ND <0.5 8270C 12/18/19:219663SBL CCV ntgL 20.00 80.5% 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. LCS :Laboratory Control Standard/Sample-Prepared to verify that the preparation process is not affecting analyze 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. BS :Blank Spikes-A blank is spiked with a known amount of analyte.It is prepared to verify that the preparation process is not affecting analyte recovery. BSD :Blank Spike Duplicate of BS/BSD pair-A blank duplicate is spiked with a known amount of analyte.It is prepared to verify that the preparation process is not affecting analyte recovery. Page 40 of 41 January 13, 2020 Lab ID : SP 1916583 South Tahoe Public Utility District Customer : 2-11369 Quality Control- Organic Definition MSRPD MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation and analysis. BSRPD :BS/BSD Relative Percent Difference(RPD)-The BS relative percent difference is an indication of precision for the preparation and analysis. AID :Non-detect-Result was below the DQO listed for the analyte. DQO Data 2uali OUcctive-This is the criteria algainst which the uali control data is com ared. Explanation 320 :LCS not within Acceptance Range(AR).Data was accepted based on the BS/BSD recovery. 325 :The LCS was out of acceptance limits.Results may be biased low. 330 :The LCS was out of acceptance limits.Results may be biased high. 360 :CCV above Acceptance Range(AR).Samples which were non detect for this analyte were accepted. 380 :CCV met CCC and SPCC criteria,Results were reported. 410 :Relative Percent Difference(RPD)not within Maximum Allowable Value(MAV).Data was accepted based on the LCS or CCV recovery. 435 :Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. 436 :Blank Spike BS not within Acceptance Range(AR).Data was accepted based on the LCS or CCV recovery. Page 41 of 41 SOUTH TAHOE PUBLIC UTILITY DISTRICT CHAT OF CUSTO Y South Tahoe Public Utility District t q� g Lab Sent to: ;; �� �`:-�`; %fi>r <.'>fSa; >S'"::::;»%;i%s Turnaround Time 1275 Meadow Crest Drive FU L #,;::<-;:-<»•: ::::< South Lake Tahoe, CA 96150 s s Sampler. Standard Phone: (530)-543-6231 ,,,.�•'` FAX: 530 -541-4296 �p5 rA�- b 24 Hr $ffJt# ri"fftt## 4 Hr r:$ssssss:sssu;Y�;sY r.a ss i' f'JS ssss "^$^s 'ssszss IUY1 Other f; ` ..S s. tr'.:,s3tf,t.$,fuff w:S6Srtt.F"v�✓,r:„iS .ftrif WNiyf Y.v'rfnx: ;cri�:f,SSb! t e�ft'r:, : : bow; 3 10-b "Cl b9 SCE WO O RAW l utn� 24 �, ' S3 ' 'N od- fu l " ti tht 2-4 ✓ �- bTF, Comments: Relinquished by: Received by: ❑ Report MTBE to 0.5 µg/L. Note any detection of MTBE a 0.2 µg/L ❑ Analyze Travel and Field Blanks only if VOCs detected in samples. Signature Signature -— u Use Calif State Write-On form to report results of Potable Water Wells Print S J ,1� Print Company South Tahoe Public Utility District Company Please Return all STPUD ice chests & Blue Ice. Date: �Z' u•T"�� Time j2?� Date _ Time 1:, .E..............: N ;;/s>;>;i >;>:: i%v Relinquished by: Received by Received intact Signature _ Signature Received cold Print Print Custody seals Company Company Correct container Date: Time Date: Time U-abTorrm\Chain of Custody.doc Page of Subcontract to Babcock Laboratories, Inc. tap Re Client. Fruit Growers Laboratory,Inc. Address: FGL Environmental, Inc. 853 Corporation St. Santa Paula,CA 93060-3005 v Phone: Fax: 3 o. v Contact Person: ; x Project Name: SP 1916583-(2-11369) E = a Purchase Order Number: n 3 U W � w < V a Sampler(s) OPS/LDA/ML — � u 8 W Z j o U u a D � OO ONO Compositor Setup Date:_/ /_ Time:_/_ a v 0 E a Z O V) E o u u Lab Number: o � a o 0 amp Date Time � u u a 4 a N Num Location Description Sampled Sampled FT all = 0 0 0 O �OO vX 00 5 Centrifuge Cake 12/03/19 00:00 C Sig I I Remarks: Relinquished Date: Time: Relinquished Date: Time: Relinquished Date: Time: Report MTBE to 0.5 ug/L. Note any detection of MTBE >0.2 u /L Analyze Travel and Field Blanks only if VOCs detected in samples. Received By: Date: Time: Received By: Date: Time: Received By: Date: Time: Use Calif State Write-On form to report results of Potable Water Wells 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 777149229590 3.Were samples received in a chilled condition? Temps: 3C 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? F 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 0gdM1ysignedby CyrKna TCas Cynthia T Casarez ® Tdle Semple Receiving Approved By Date izna2019.1osgas Discrepency Documentation: Any items above which are"No"or do not meet specifications(i.e.temps)must be resolved. 1. Person Contacted:Dan Arce Phone Number: Initiated By: Cynthia Casarez Date: 2019-12-09 Problem: One container received broken for WW-01 Raw Influent Resolution: Will use remaining three containers for analysis requested. 2. Person Contacted: Phone Number: Initiated By: Date: Problem: Resolution: (2011369) South Tahoe Public Utility District SP 1916583 CTC-12/10/2019-10:39:43 HEAVENLY VALLEY CREEK EMERGENCY RETENTION BASIN And HEAVENLY VALLEY CREEK MONITORING Monthly monitoring of Heavenly Valley Creek and the monitoring wells were performed throughout 2019. Heavenly Valley Creek is the natural drainage of the areas in which the Emergency Retention Basin (ERB) and Ponds #1 and #2 are located. The monitoring results for Heavenly Valley Creek and treatment plant monitoring wells are tabulated below. Each site is reported with tables showing the monthly results for 2019 and the yearly averages since monitoring was initiated. Monitoring wells for buried sludge was initiated in 1992. The monthly results for 2019 are reported. s� �4 •,�,'w Jti i, ,� � � 1 �f �+• � S � i � �� r t ,�'re `,.. �• � �t�'� `x''- is _ _i'� t _� 6+�•�f { �" 1., �- / -try y�� ! �,�y {. Ilk H1/Cgy3 VC-s .��.��� ,• •�� � � _`fit, i r to,HVC-2'. f tir e • ; ! HVC`--1 Meadowees t Y! # M. • y\ ti y : y�: i 1 -� 4 w1�' S .�l• a .� .s Image 2010 DigitalGlobe 0 S It Ave- �' 2DG5 GOOS i .1 4C +, X t • P �� II I I y`�4oavin�Dr` .�=1 0 2010 Google Imagery Date Nov 1. 2007 lat 38.919987" Ion -119 965368" elev 6331 it Eye alt 9853 It Site: HVC-1 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/9/2020 WATER QUALITY DATA Below Pioneer Trail HEAVENLY VALLLEY CREEK Temp EC Chloride COD TKN NO3-N Date C pH umhos mg/L mg/L mg/L mg/L Note 01/22/2019 0.7 7.31 92.2 7.10 0.106 0.094 02/20/2019 No Sample 03/13/2019 1.2 7.28 49 1.55 < 0.100 0.044 04/24/2019 6.7 6.69 45.8 1.09 0.051 0.018 05/21/2019 2.8 6.97 38.9 0.959 0.050 0.021 06/26/2019 8.6 6.97 23 0.635 0.100 0.016 07/18/2019 11.2 7.27 36.3 0.650 0.114 < 0.010 08/06/2019 11.6 6.29 34 0.536 < 0.100 < 0.010 09/10/2019 7.6 7.11 48.9 0.749 0.111 0.024 10/15/2019 5.2 6.75 45.6 0.796 < 0.100 0.016 11/13/2019 5.7 7.14 46.6 0.787 < 0.100 0.011 12/17/2019 0.2 6.37 57.3 0.873 < 0.100 0.042 Maximum 11.6 7.31 92.2 7.10 0.114 0.094 Minimum 0.2 6.29 23.0 0.54 < 0.050 < 0.010 Average 5.6 6.92 47.1 1.40 0.094 0.028 #Tests 11 11 11 11 0 11 11 Temp pH EC Chloride COD TKN NO3-N Year C umhos mg/L mg/L mg/L mg/L Comments 1984 4.0 7.30 43.0 0.90 5.0 0.110 1985 3.7 7.39 50.0 1.30 6.0 0.180 1986 4.1 7.18 42.0 1.00 8.0 0.130 1987 4.7 6.70 77.0 5.50 5.0 0.200 1988 1.9 6.99 80.0 5.10 5.0 0.330 1989 4.8 7.14 59.0 1.50 6.0 0.150 1990 5.0 7.46 75.3 2.09 6.8 0.209 1991 5.6 7.34 84.9 2.44 6.3 0.153 1992 3.4 7.49 75.8 2.30 13.0 0.146 1993 5.5 7.25 57.8 1.67 9.1 0.120 0.093 1994 4.4 7.54 66.9 2.10 10.6 0.600 0.098 1995 5.1 6.80 55.8 1.85 10.6 0.335 0.085 1996 5.6 7.30 49.0 1.10 6.0 0.234 0.050 1997 6.1 7.25 42.0 0.90 6.0 0.294 0.070 1998 4.9 6.90 44.0 1.00 5.0 0.203 0.050 1999 5.2 6.97 43.7 0.99 5.3 0.218 0.079 2000 5.1 7.33 47.5 0.91 5.0 0.194 0.063 2001 6.3 7.30 56.6 1.39 5.5 0.147 0.113 2002 7.3 6.88 55.4 1.61 5.9 0.163 0.066 2003 6.7 7.12 58.1 2.75 10.4 0.199 0.099 2004 5.3 7.15 58.5 1.60 6.8 0.279 0.082 2005 5.3 7.29 50.6 1.50 13.3 0.209 0.073 2006 4.9 7.18 47.4 1.00 8.9 0.116 0.040 2007 6.1 7.12 57.8 1.40 11.2 0.148 0.077 2008 6.4 7.09 57.2 1.40 7.5 0.089 0.083 2009 5.5 7.20 56.0 1.50 14.6 0.145 0.070 2010 4.7 7.26 56.9 1.60 7.9 0.116 0.083 2011 4.7 7.16 49.2 0.90 8.7 0.179 0.038 2012 6.1 7.27 61.6 1.20 0.067 0.068 2013 5.8 7.33 66.6 1.40 0.090 0.124 2014 6.0 7.24 65.7 1.60 0.066 0.131 2015 6.4 7.42 70.0 1.60 0.130 0.088 2016 7.1 7.09 61.4 2.80 0.129 0.063 2017 6.7 7.15 48.1 0.80 0.153 0.022 2018 6.3 7.06 55.9 0.90 0.587 0.037 2019 5.6 6.92 47.1 1.40 0.094 0.028 Maximum 7.3 7.54 84.9 5.50 14.6 0.600 0.330 Minimum 1.9 6.70 42.0 0.80 5.0 0.066 0.022 Average 5.3 7.18 57.6 1.69 7.8 0.196 0.099 #Years 36 36 36 36 28 27 36 Site: HVC-2 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/9/2020 WATER QUALITY DATA Upstream STPUD HEAVENLY VALLLEY CREEK Temp EC Chloride COD TKN NO3-N Date C pH umhos mg/L mg/L mg/L mg/L Note 01/22/2019 0.3 6.18 63.7 2.29 0.242 0.021 02/20/2019 0.4 6.23 61.2 3.05 0.458 0.038 03/13/2019 0.9 6.74 46 2.52 0.160 0.013 04/24/2019 12.5 6.31 42.7 3.15 0.185 0.016 05/21/2019 6.5 6.28 34.2 1.04 0.102 < 0.010 06/26/2019 12.7 5.99 27 0.551 0.201 < 0.010 07/18/2019 13.3 6.49 41.5 0.663 0.183 < 0.010 08/06/2019 15.7 6.88 41 0.558 0.191 < 0.010 09/10/2019 5.8 6.88 56.9 0.723 0.317 < 0.010 10/15/2019 5.7 6.30 46.1 0.869 0.158 < 0.010 11/13/2019 3.6 6.49 45.6 0.839 0.168 < 0.010 12/17/2019 0.3 5.76 59.1 1.41 0.204 0.011 Maximum 15.7 6.88 63.7 3.15 0.0 0.458 0.038 Minimum 0.3 5.76 27.0 0.55 0.0 0.102 < 0.010 Average 6.5 6.38 47.1 1.47 0.214 0.014 #Tests 12 12 12 12 0 12 12 Temp pH EC Chloride COD TKN NO3-N Year C umhos mg/L mg/L mg/L mg/L Comments 1984 4.5 7.07 44.0 1.40 6.0 0.090 1985 3.2 7.13 47.0 1.30 7.0 0.110 1986 3.3 6.75 43.0 1.60 19.0 0.170 1987 3.9 7.10 47.0 1.40 7.0 0.090 1988 0.9 6.67 56.0 2.50 7.0 0.070 1989 4.2 6.95 64.7 2.74 24.0 0.220 1990 5.2 6.89 63.2 3.14 24.6 0.064 1991 10.6 6.79 56.8 4.30 21.0 0.075 1992 No flow for entire year 1993 6.5 7.04 56.8 2.95 20.5 0.480 0.301 1994 3.9 7.11 68.7 2.52 15.3 0.057 1995 5.6 6.33 46.9 2.05 11.2 0.378 0.056 1996 6.2 6.92 47.0 1.50 12.0 0.386 0.020 1997 6.9 7.12 49.0 1.70 4.0 0.290 0.020 1998 5.1 6.78 48.0 1.50 6.0 0.277 0.010 1999 6.1 6.72 47.9 1.14 5.6 0.239 0.020 2000 4.3 7.05 47.2 1.32 7.4 0.255 0.033 2001 5.3 6.97 51.6 1.78 7.6 0.265 0.015 2002 8.7 6.91 53.3 2.86 13.9 0.258 0.016 2003 10.2 6.73 59.5 4.12 20.6 0.377 0.056 2004 7.1 6.89 38.0 1.49 8.4 0.272 0.026 2005 6.6 6.78 41.4 1.53 21.8 0.504 0.043 2006 4.9 6.96 47.6 1.44 13.3 0.158 0.015 2007 4.6 7.04 49.2 1.39 10.1 0.156 0.019 2008 6.8 6.88 45.2 1.74 10.0 0.180 0.032 2009 6.4 6.72 41.1 1.63 16.3 0.328 0.014 2010 5.7 7.05 47.7 2.13 15.9 0.230 0.083 2011 5.2 6.74 49.2 1.13 15.2 0.143 0.018 2012 5.9 6.72 53.7 2.32 0.216 0.017 2013 5.7 6.67 53.9 2.83 0.168 0.026 2014 6.5 6.43 56.7 3.75 0.377 0.073 2015 8.7 6.65 42.2 1.38 0.404 0.197 2016 7.3 6.26 75.9 4.19 0.342 0.025 2017 7.6 6.66 46.2 1.41 0.192 0.015 2018 6.5 6.70 54.1 1.29 0.363 0.015 2019 6.5 6.38 47.1 1.47 0.214 0.014 Maximum 10.6 7.13 75.9 4.30 24.6 0.504 0.301 Minimum 0.9 6.26 38.0 1.13 4.0 0.143 0.010 Average 5.9 6.82 51.1 2.08 13.0 0.287 0.061 #Years 35 35 35 35 27 26 35 Site: HVC-3 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/9/2020 WATER QUALITY DATA Below Meadow Crest Dr HEAVENLY VALLLEY CREEK Temp EC Chloride COD TKN NO3-N Date C pH umhos mg/L mg/L mg/L mg/L Note 01/22/2019 No Sample 02/20/2019 No Sample 03/13/2019 0.8 7.00 53 3.50 0.161 0.014 04/24/2019 11.2 6.21 45.4 1.70 0.145 0.022 05/21/2019 3.9 6.48 37.8 1.05 0.176 <0.010 06/26/2019 12.6 6.39 28 0.569 0.145 <0.010 07/18/2019 12.9 6.77 41.9 0.664 0.175 <0.010 08/06/2019 15.0 6.85 42 0.556 0.179 <0.010 09/10/2019 6.5 6.95 58.5 0.780 0.246 <0.010 10/15/2019 5.1 6.49 47.1 0.860 0.147 <0.010 11/13/2019 3.1 6.75 48.0 0.840 0.171 <0.010 12/17/2019 0.7 6.03 62.1 1.53 0.176 < 0.010 Maximum 15.0 7.00 62.1 3.50 0.0 0.246 0.022 Minimum 0.7 6.03 28.0 0.56 0.0 0.100 < 0.010 Average 7.2 6.59 46.4 1.20 0.172 0.012 #Tests 10 10 10 10 0 10 10 Temp pH EC Chloride COD TKN NO3-N Year C umhos mg/L mg/L mg/L mg/L Comments 1984 4.6 7.05 50.0 1.90 7.0 0.100 1985 3.4 7.16 84.0 3.80 9.0 0.190 1986 4.1 6.73 93.0 11.80 25.0 0.590 1987 3.9 6.94 96.0 5.10 16.0 0.170 1988 0.9 6.65 241.0 17.70 22.0 1.220 1989 4.8 7.01 152.0 12.40 38.1 0.320 1990 7.1 7.27 88.3 5.95 13.8 0.178 1991 7.5 6.90 161.7 12.18 15.5 0.165 1992 1.1 7.07 289.0 22.50 29.0 0.105 1993 6.0 7.08 88.8 4.20 21.8 0.770 0.247 1994 5.1 7.24 82.6 3.79 48.6 3.240 0.084 1995 5.5 7.11 70.8 3.90 9.4 0.487 0.128 1996 6.0 6.88 49.0 1.70 12.0 0.314 0.040 1997 6.6 7.05 51.0 1.80 4.0 0.290 0.020 1998 4.9 6.73 51.0 1.60 6.0 0.272 0.020 1999 5.5 6.81 50.7 1.37 5.6 0.255 0.018 2000 4.2 7.07 50.8 1.51 7.2 0.322 0.038 2001 7.3 6.66 63.3 2.34 7.0 0.334 0.011 2002 7.3 6.96 76.6 3.77 29.7 0.659 0.154 2003 6.7 6.82 97.3 5.38 20.7 0.455 0.262 2004 6.2 6.79 42.3 1.68 8.5 0.219 0.058 2005 5.5 6.83 49.3 1.73 16.0 0.386 0.145 2006 4.3 6.93 50.9 1.57 13.4 0.184 0.017 2007 3.9 6.89 52.1 1.59 10.0 0.133 0.022 2008 6.5 6.85 64.0 2.79 10.4 0.211 0.187 2009 5.8 6.85 55.3 4.08 17.8 0.307 0.098 2010 5.6 7.09 56.7 2.61 14.3 0.228 0.146 2011 5.0 6.89 51.0 1.27 13.5 0.330 0.023 2012 5.4 6.74 56.3 2.17 0.211 0.018 2013 5.5 6.81 59.5 3.85 0.190 0.032 2014 6.7 6.56 68.4 6.07 0.308 0.033 2015 7.6 7.27 46.8 1.90 0.476 0.174 2016 7.1 6.40 88.5 9.31 0.322 0.198 2017 8.1 6.83 52.2 1.51 0.185 0.021 2018 6.1 6.82 56.6 1.67 0.605 0.021 2019 7.2 6.59 46.4 1.20 0.167 0.012 Maximum 8.1 7.27 289.0 22.50 48.6 3.240 1.220 Minimum 0.9 6.40 42.3 1.20 4.0 0.133 0.011 Average 5.5 6.90 80.1 4.71 16.1 0.439 0.146 #Years 36 36 36 36 28 27 36 Site: HVC-5 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/9/2020 WATER QUALITY DATA Culvert Avove Meadow Crest Dr HEAVENLY VALLLEY CREEK Temp EC Chloride COD TKN NO3-N Date C pH umhos mglL mg/L mg/L mg/L Note 01/22/2019 02/13/2019 02/13/2019 02/20/2019 03/13/2019 04/09/2019 4.7 6.39 124 8.99 0.428 04/24/2019 05/16/2019 05/17/2019 05/16/2019 05/19/2019 05/21/2019 05/23/2019 05/23/2019 0 5/2 612 0 1 9 05/26/2019 05/26/2019 05/26/2019 05/3012019 06/26/2019 07/18/2019 08/06/2019 09/10/2019 09/16=19 10/15/2019 11/13/2019 12/01/2019 12/01/2019 12/02/2019 12/02/2019 12/07/2019 12/07/2019 12/07/2019 12/08/2019 12/13/2019 12/17/2019 Maximum 4.7 6.39 124.0 9.0 0.428 0.000 Minimum 4.7 6.39 124.0 8.99 0.428 0.000 Average 4.7 6.39 124.0 9.0 0.428 #Tests 1 1 1 1 0 1 0 Temp pH EC Chloride COD TKN NO3-N Year C umhos mg/L m L m /L m/L Comments 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 8.0 7.53 80.0 3.70 18.0 0.910 0.240 1995 4.2 6.83 36.0 2.00 41.0 1.000 0.130 1996 5.3 7.28 69.0 8.40 31.0 0.963 0.350 1997 4.3 6.49 268.0 3.50 29.0 0.840 0.070 1998 0.7 6.50 133.0 5.20 27.0 0.910 1.780 1999 8.0 6.97 67.4 12.60 25.7 1.190 0.123 2000 4.4 6.67 31.1 15.35 21.2 0.639 0.236 2001 Dry 2002 4.9 6.74 30.1 1.10 92.9 1.460 0.352 2003 1.1 7.29 37.0 6.69 24.0 0.583 0.222 2004 Dry 2005 3.7 6.73 74.3 4.08 66.0 1.016 0.689 2006 6.1 7.23 112.0 3.49 45.7 0.568 0.455 2007 2.1 6.62 45.9 3.27 93.5 0.875 0.216 2008 Dry 2009 5.9 7.01 36.0 2.76 31.6 0.447 0.210 2010 6.2 7.18 174.3 33.92 97.3 0.846 0.539 2011 6.3 6.64 66.7 3.72 208.0 0.980 0.441 2012 3.9 6.59 38.8 3.17 0.509 0.180 2013 15.7 5.89 50.7 4.34 1.880 0.401 2014 4.4 6.73 50.2 7.23 0.319 0.116 2015 9.5 6.08 33.8 8.46 1.201 0.069 2016 5.0 6.69 101.7 22.08 0.311 0.101 2017 5.9 6.43 50.7 8.41 0.823 0.187 2018 6.1 7.10 93.3 14.9 0.969 0.226 2019 4.7 6.39 124 8.99 0.428 Maximum 15.7 7.53 268.0 33.92 208.0 1.880 1.780 Minimum 0.7 5.89 30.1 1.10 18.0 0.311 0.069 Average 5.5 6.77 78.4 8.15 56.8 0.855 0.333 #Years 23 23 23 23 15 23 22 uhmos/cm CI, mg/L NO3-N,mg/L 1984 1984 1985 V 1984 1985 1986 1 ► 1986 _ 1986 I, 1986 �- 1987 1988 _-----► 1987 1989 ► 1990 ♦1 ► 1989 ���► - --- 1990 rw♦K _ 1 1990 */►V�� j 1991 ■ t ► 1992 1 _►a _,► 1991 1 1992 ♦ _-► . __ 1992 1993 / ► _ m 1994 r �� ----- 1993 :\ ►■ 1994 N 1994 1995 �, 0 1995 4: 1995 Z 1996 1996 ♦ // 1996 1997 1997 +0 ^ 1997 C) J n - ♦/ 1998 1998 M 3 Q 1998 1 1999 999 • Q1999 2000 ♦ z 2000 2000 ' i 2000 2002 11 Q. 2002 ♦ 2001 x� zoo 2003 (� n 20D3 2002 2004 I ♦ C n 2003 N ► (p N rt N 2004 r N 2004 / 2005 2006 W 2006 ID • T II 2006 !.2007 12007 2007 n 2008 I C) 2008 T < 2008 I t w 2009 2009 w 2009 2010 2010 I, f 2011 2011 2011 2011 2012 2012 : 2012 2013 1 2013 2013 \♦ 2014 2014 2014 2015 ♦ 2015 2015 2016 ♦ ► 2016 1 i► 2016 1 2017 ` 2017 I�f 20167 2018 i/f 2018 + 2018 2019 ■ 2019 1• 2019 EMERGENCY RETENTION BASIN , TREATMENT PLANT & BURIED SLUDGE MONITORING WELLS MW07 Hank.Monk.,�� ► +• �, till t ~�L 1 , •• • MW04 A/0 .Snowshoe Thompaam0 O.ve'• sft �' � •�ntr 1 MW k ' MW03 ". MW02 ti 41 Y ; Imep:O 2011 DiOitelGlobi dear' etas \11 '643 ft.'. ,�� '4 �•i.__ -. 020f1 C9op1e Ime9eiy Deb; g0 1. 2007 let 38.9f 001' 1661,41VON64866'1' 'elev 631+tt Eye alt 8506 it SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/9/2020 Site: CONTROL WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/08/19 6282.40 9.0 6.86 253 20.2 4.74 04/17/19 6282.18 9.9 6.77 231 17.6 4.32 08/01/19 6283.09 10.1 6.87 252 18.7 4.70 10/28/19 6282.75 NV 6.72 170 19.9 4.70 Maximum 6283.09 10.1 6.87 253 20.2 4.74 Minimum 6282.18 9.0 6.72 170 17.6 4.32 Average 6282.61 9.7 6.81 227 19.1 4.62 #Tests 4 3 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N _ Year Level C pH umhos mg/L mg/L m /L Comments 1984 1985 1986 1987 6281.4 9.1 6.87 137 3.6 6 0.64 1988 6277.4 9.2 6.84 115 0.6 7 0.10 1989 6279.1 10.4 7.18 118 0.6 6 0.24 1990 6274.0 9.7 7.27 120 0.9 5 0.44 1991 6273.3 9.3 7.21 118 1.4 < 5 0.61 1992 6272.2 9.4 7.44 123 1.2 5 0.73 1993 6273.1 9.9 7.25 131 1.4 5 1.01 1994 6275.2 11.0 7.11 143 1.8 6 1.50 1995 6277.7 9.5 7.07 153 2.7 7 2.03 1996 6282.9 9.6 7.06 162 5.7 3 2.66 1997 6285.5 10.1 6.89 173 5.6 4 2.64 1998 6284.0 9.8 6.66 170 5.8 < 5 2.39 1999 6284.3 9.3 6.70 175 6.8 6 2.43 2000 6282.8 9.4 6.83 174 7.4 < 5 2.40 2001 6280.5 9.4 6.87 173 8.1 5 2.34 2002 6278.7 9.6 6.89 176 8.1 6 2.36 2003 6278.4 10.2 7.02 182 8.6 5 2.60 2004 6278.7 9.1 6.91 182 9.4 6 2.91 2005 6279.3 9.2 7.01 189 9.8 8 3.18 2006 6283.0 9.7 6.96 200 10.1 8 3.45 2007 6281.8 9.8 6.82 192 10.5 6 3.40 2008 6279.6 10.1 6.96 190 10.9 5 3.42 2009 6278.6 9.8 ' 6.81 204 11.7 6 3.72 2010 6278.6 9.9 6.79 217 12.6 5 4.00 2011 6281.6 9.7 6.84 225 13.1 8 4.28 2012 6281.6 9.7 7.19 226 15.1 4.70 2013 6279.6 9.8 7.39 230 15.6 4.69 2014 6278.4 9.6 7.00 236 16.0 4.55 2015 6277.1 10.4 6.87 240 16.0 4.60 2016 6277.1 9.0 6.96 240 16.4 4.71 2017 6282.9 9.0 6.95 244 15.9 4.97 2018 6283.9 10.0 6.95 254 18.7 5.03 2019 6282.6 9.7 6.81 227 19.1 4.62 Maximum 6285.5 11.0 7.44 254 19.1 8 5.03 Minimum 6272.2 9.0 6.66 115 0.6 3 0.10 Average 6279.5 9.7 6.98 183 8.8 6 2.83 #Years 33 33 33 33 33 25 33 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/9/2020 Site: MW01.5 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/08/19 6268.90 8.0 7.28 174 2.41 0.403 04/17/19 6269.04 8.7 7.09 159 1.98 0.454 08/01/19 6269.15 8.9 7.08 153 1.67 0.385 10/28/19 6269.00 8.9 7.06 168 1.72 0.375 Maximum 6269.15 8.9 7.28 174 2.41 0.454 Minimum 6268.90 8.0 7.06 153 1.67 0.375 Average 6269.02 8.6 7.13 164 1.95 0.404 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 1985 1986 6273.3 8.1 7.11 402 30.6 4 4.72 1987 6272.9 9.1 6.87 355 23.7 5 2.79 1988 6271.6 9.7 6.97 327 20.7 8 2.21 1989 1990 1991 1992 1993 1994 1995 1996 1997 6270.4 9.6 7.02 196 6.0 4 0.970 1998 6269.5 9.0 6.98 165 4.3 < 5 0.670 1999 6275.9 9.3 7.03 171 3.4 < 5 0.680 2000 6268.9 9.4 7.08 170 3.0 6 0.650 2001 6268.5 9.3 6.80 157 2.6 5 0.510 2002 2003 2004 2005 6270.3 9.1 7.01 192 4.5 9 0.590 2006 6270.0 9.2 7.19 180 4.0 8 0.631 2007 6278.8 9.4 7.05 168 3.7 6 0.776 2008 6267.9 9.8 7.17 162 3.2 5 0.649 2009 6267.6 9.2 7.12 162 2.6 5 0.537 2010 6267.7 9.4 7.05 161 2.3 5 0.480 2011 6268.3 8.9 6.97 174 2.4 10 0.482 2012 6268.4 9.1 .7.19 159 2.3 0.475 2013 6267.7 9.0 7.10 162 2.1 0.457 2014 6267.4 9.0 7.18 163 2.2 0.405 2015 6267.2 8.8 6.96 172 2.2 0.462 2016 6267.4 8.8 7.09 159 2.2 0.451 2017 6269.3 9.2 7.15 179 2.1 0.414 2018 6269.3 9.4 7.31 167 2.2 0.420 2019 6269.0 8.6 .7.13 164 1.95 0.404 Maximum 6278.8 9.8 7.31 402 30.6 10 4.720 Minimum 6267.2 8.1 6.80 157 2.0 4 0.404 Average 6269.9 9.1 7.07 194 5.8 6 0.906 #Years 23 23 23 23 23 15 23 SOUTH TAHOE PUBLIC UTILITY DISTRICT 41912020 Site: MW02-50 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/08/19 6268.60 8.9 6.61 295 32.0 2.82 04/17/19 6268.88 10.3 6.55 275 28.5 2.62 08/01/19 6268.16 10.5 6.61 281 30.0 2.55 10/28/19 6268.65 9.3 6.38 287 29.9 2.42 Maximum 6268.88 10.5 6.61 295 32.0 2.82 Minimum 6268.16 8.9 6.38 275 28.5 2.42 Average 6268.57 9.8 6.54 285 30.1 2.60 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 6284.1 1985 1986 6271.7 8.6 6.56 470 46.3 4 12.28 1987 6272.4 10.5 6.51 584 63.3 7 12.72 1988 6273.3 10.7 6.60 574 60.8 9 9.68 1989 6265.9 8.6 8.53 630 62.5 5 13.51 1990 Dry 1991 Dry 1992 Dry 1993 Dry 1994 Dry 1995 Dry 1996 6269.4 9.3 6.78 528 53.2 2 12.40 1997 6270.3 10.4 6:53 588 59.2 4 13.92 1998 6269.1 10.1 6.53 557 55.0 < 5 12.82 1999 6269.2 9.8 6.41 456 43.3 6 10.22 2000 6268.5 10.2 6.69 404 37.6 5 8.60 2001 6268.3 10.3 6.59 391 36.9 5 8.40 2002 Dry 2003 Dry 2004 Dry 2005 6270.1 9.9 6.53 535 52.0 12 15.16 2006 6269.9 10.4 6.37 614 53.9 10 18.35 2007 6268.6 10.5 6.31 573 52.7 8 14.98 2008 6268.0 10.7 6.59 438 42.7 5 9.48 2009 6266.7 10.6 6.49 389 39.2 6 7.35 2010 . 6265.9 10.3 6.50 364 37.9 7 6.38 2011 6268.6 10.0 6.54 358 36.9 13 5.84 2012 6268.2 10.2 6.46 348 39.0 5.16 2013 6267.1 10.0 6.66 334 37.2 4.39 2014 6266.7 10.1 6.77 326 37.6 3.88 2015 6266.5 10.3 6.73 323 36.6 3.25 2016 6266.2 9.9 6.69 312 36.2 2.93 2017 6269.0 9.7 6.68 312 29.9 2.69 2018 6269.2 10.4 6.65 304 31.5 3.04 2019 6268.6 9.8 6.54 285 30.1 2.60 Maximum 6284.1 10.7 8.53 630 63.3 13 18.35 Minimum 6265.9 8.6 6.31 285 29.9 2 2.60 Average 6269.3 10.1 6.65 440 44.5 7 8.80 #Years 26 25 25 25 25 17 25 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/9/2020 Site: MW03-50 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/08/19 6268.60 9.2 6.30 420 75.0 0.581 04/17/19 6268.99 10.2 6.23 361 64.8 0.899 08/01/19 6268.97 10.6 6.20 377 69.8 0.438 10/29/19 6268.74 9.5 6.17 378 66.8 0.472 Maximum 6268.99 10.6 6.30 420 75.0 0.899 Minimum 6268.60 9.2 6.17 361 64.8 0.438 Average 6268.83 9.9 6.23 384 69.1 0.82 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 6275.7 9.4 6.40 431 45.7 16 7.19 1985 6270.5 10.8 6.46 418 36.6 25 9.84 1986 6273.9 10.7 6.21 443 41.4 10 5.37 1987 6272.7 10.4 6.29 518 59.2 9 1.63 1988 6269.4 11.1 6.28 653 68.9 6 1.79 1989 6265.9 11.7 6.39 738 67.3 8 0.88 1990 6265.4 11.3 6.44 814 66.2 10 2.24 1991 6265.1 10.6 6.52 713 63.6 8 0.75 1992 6265.2 10.2 6.57 668 61.4 9 1.41 1993 6266.1 10.8 6.41 636 57.9 8 1.51 1994 6265.4 10.9 6.45 645 60.5 8 1.34 1995 6267.3 9.8 6.51 578 53.2 9 6.78 1996 6269.1 10.4 6.26 539 55.0 3 13.48 1997 6270.4 10.4 6.20 595 51.3 4 21.33 1998 6269.2 10.2 6.11 493 46.5 < 5 11.17 1999 6269.2 9.8 6.11 400 38.3 5 4.53 2000 6268.5 10.3 6.46 381 32.0 5 4.85 2001 6268.0 10.6 6.33 494 42.6 5 18.51 2002 6267.6 10.6 5.96 671 55.8 7 28.95 2003 6267.5 10.8 6.11 623 60.4 5 22.14 2004 6267.4 9.9 6.27 531 50.9 6 16.43 2005 6270.6 10.4 6.33 513 49.9 10 21.70 2006 6270.1 10.6 6.22 542 61.0 9 17.00 2007 6268.8 10.8 6.10 500 67.5 7 10.30 2008 6268.0 11.0 6.59 429 63.1 6 5.90 2009 6267.8 10.3 6.50 480 58.3 6 14.10 2010 6267.7 10.7 6.48 493 62.4 7 17.10 2011 6268.8 10.5 6.36 469 63.7 10 11.60 2012 6268.3 10.6 6.35 396 53.9 5.10 2013 6267.6 10.8 6.40 484 51.6 16.70 2014 6267.2 10.2 6.16 598 53.2 27.50 2015 6267.0 10.3 6.15 560 47.4 23.10 2016 6267.3 10.0 6.23 474 41.6 14.60 2017 6269.4 10.0 6.33 504 84.7 5.00 2018 6269.2 9.7 6.26 518 104.7 0.82 2019 6268.8 9.9 6.23 384 69.1 0.82 Maximum 6275.7 11.7 6.59 814 104.7 25 28.95 Minimum 6265.1 9.4 5.96 381 32.0 3 0.75 Average 6268.5 10.5 6.32 537 56.9 8 10.37 #Years 36 36 36 36 36 28 36 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/9/2020 Site: MW04-50 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/08/19 6269.97 7.2 6.25 96.4 7.41 0.079 04/17/19 6271.07 9.0 6.15 83 6.36 0.085 08/01/19 6271.30 9.1 6.45 82.2 6.27 0.041 10/29/19 6270.40 7.7 6.21 91.2 6.89 0.047 Maximum 6271.30 9.1 6.45 96.4 7.41 0.085 Minimum 6269.97 7.2 6.15 82.2 6.27 0.041 Average 6270.69 8.3 6.27 88.2 6.73 0.063 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 6266.6 11.4 6.68 90 1.8 3 0.330 1985 1986 6266.9 7.2 6.18 75 3.8 4 0.570 1987 6265.6 8.9 6.14 208 31.7 6 1.720 1988 6263.8 8.7 5.96 306 44.9 8 1.350 1989 6261.6 9.5 6.12 284 36.5 6 1.190 1990 6263.0 8.7 6.20 272 35.9 6 1.494 1991 6263.2 8.5 6.39 286 46.6 5 1.047 1992 6261.8 8.4 6.23 358 55.8 6 0.686 1993 6263.4 9.0 6.19 217 25.6 6 0.637 1994 6263.7 9.1 6.16 190 21.9 7 0.565 1995 6267.5 8.6 6.70 146 12.9 11 0.365 1996 6269.5 8.7 6.38 85 4.8 3 0.070 1997 6271.4 8.9 6.37 77 5.3 4 0.070 1998 6270.1 8.4 6.15 140 6.0 < 5 01060 1999 6270.1 8.6 6.04 77 5.5 < 5 0.070 2000 6267.9 8.3 6.58 76 5.3 < 5 0.070 2001 6267.6 9.1 6.48, 77 4.8 < 5 0.100 2002 6267.3 8.8 6.06 80 4.4 6 0.100 2003 6267.6 9.1 6.32 79 5.5 5 0.080 2004 6267.8 6.6 6.27 74 4.2 5 0.050 2005 6269.8 8.7 6.32 80 4.2 9 0.061 2006 6271.8 8.9 6.48 81 6.2 8 0.026 2007 6269.4 9.1 6.57 81 6.6 6 0.027 2008 6268.7 9.1 6.78 80 6.5 5 0.027 2009 6268.3 8.7 6.21 80 5.9 7 0.037 2010 6268.6 9.0 6.14 82 5.5 6 0.037 2011 6271.0 9.1 6.11 81 5.4 6 0.037 2012 6269.4 8.6 6.19 79 6.3 0.042 2013 6268.8 8.9 6.17 78 5.4 0.116 2014 6268.3 8.9 6.31 81 5.1 0.298 2015 6267.9 8.9 6.27 91 4.9 0.608 2016 6268.4 9.0 6.16 90 4.9 0.826 2017 6269.0 6.6 6.33 100 9.3 0.071 2018 6270.6 8.5 6,28 98 8.5 0.064 2019 6270.7 8.3 6.27 88 6.7 0.063, Maximum 6271.8 11.4 6.78 358 55.8 11 1.720 Minimum 6261.6 6.6 5.96 74 1.8 3 0.026 Average 6267.6 8.7 6.29 128 13.0 6 0.370 #Years 35 35 35 35 35 27 35 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/912020 Site: MW07-50 WATER QUALITY DATA Area: Emergency Pond MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/08/19 6279.29 6.4 7.35 185 11.9 0.432 04/18/19 6280.02 7.6 7.08 180 10.8 0.441 08/01/19 6279.83 10.4 6.91 163 11.2 0.456 10/30/19 6279.25 7.2 6.46 182 11.2 0.474 Maximum 6280.02 10.4 7.35 185 11.9 0.474 Minimum 6279.25 6.4 6.46 163 10.8• 0.432 Average 6279.60 7.9 6.95 178 11.3 0.451 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L m /L Comments 1984 6282.7 1985 1986 6280.7 1987 6277.4 7.4 6.61 293 28.2 6 0.570 1988 6274.1 7.6 6.64 291 28.3 8 0.560 1989 6271.1 7.6 6.65 287 28.7 6 0.580 1990 6273.3 7.0 6.69 287 28.3 6 0.609 1991 6270.8 7.7 6.83 287 30.3 7 0.492 1992 6268.8 6.7 6.71 282 29.8 6 0.497 1993 6270.9 7.6 6.67 297 29.3 7 0.484 1994 6272.5 8.2 6.68 287 29.2 8 0.527 1995 6275.2 7.6 6.81 282 30.0 8 0.548 1996 6279.2 8.1 6.48 281 28.9 4 0.560 1997 6281.1 8.2 6.50 278 28.4 4 0.560 1998 6280.2 8.0 6.34 274 27.8 < 5 0.610 1999 6280.2 8.1 6.28 268 25.9 5 0.590 2000 6279.1 7.9 6.53 260 25.2 5 0.620 2001 6277.4 7.9 6.43 251 24.1 5 0.610 2002 6276.3 7.8 6.41 247 22.2 7 0.570 2003 6276.3 8.1 6.36 244 21.7 5 0.580 2004 6276.2 7.7 6.37 234 20.9 6 0.600 2005 6277.3 7.7 6.55 228 20.1 13 0.558 2006 6279.8 8.5 6.57 227 18.7 10 0.545 2007 6278.5 8.0 6.20 237 18.5 7 0.565 2008 6277.2 8.7 6.41 232 18.3 5 0.556 2009 6276.5 8.0 6.41 223 17.6 7 0.544 2010 6276.8 8.1 6.34 216 16.3 8 0.534 2011 6279.1 8.0 6.32 206 15.1 7 0.493 2012 6278.5 8.1 6.77 202 14.8 0.525 2013 6277.2 8.3 6.55 198 13.9 0.505 2014 6275.9 8.2 6.79 196 13.8 0.490 2015 6275.2 9.5 7.30 196 12.8 0.469 2016 6274.3 8.8 7.11 194 12.7 0.467 2017 6280.8 7.8 6.87 181 11.2 0.443 2018 6280.1 8.3 7.58 179 11.0 0.439 2019 6279.6 7.9 6.95 178 11.3 0.451 Maximum 6282.7 9.5 7.58 297 30.3 13 0.620 Minimum 6268.8 6.7 6.20 178 11.0 4 0.439 Average 6276.9 8.0 6.63 243 21.6 7 0.538 #Years 35 33 33 33 33 25 33 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/9/2020 Site: MW08-25 WATER QUALITY DATA Area: Treatment Plant MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/14/19 6246.30 9.5 6.88 614 22.7 0.027 04/17/19 6249.47 9.0 6.34 369 11.3 0.080 08/01/19 6247.25 11.7 6.96 743 23.3 < 0.010 10/30/19 6246.30 10.5 6.64 908 27.4 0,025 Maximum 6249.47 11.7 6.96 908 27.4 0.080 Minimum 6246.30 9.0 6.34 369 11.3 < 0.010 Average 6247.33 10.2 6.71 659 21.2 0.036 4 4. 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 6246.0 9.2 6.30 878 136.1 75 0.250 1985 6247.8 9.9 6.41 876 143.0 72 0.570 1986 6247.2 9.8 6.38 878 126.4 72 0.570 1987 6246.5 9.2 6.28 811 119.0 59 0.280 1988 6247.4 9.4 6.37 828 102.0 57 0.180 1989 6247.7 10.2 6.33 753 101.0 57 0.080 1990 6247.4 9.3 6.35 742 93.5 50 0.094 1991 6246.8 8.7 6.40 701 84.8 43 0.067 1992 6246.6 8.0 6.50 766 73.1 56 0.064 1993 6246.9, 8.8 6.38 715 54.9 61 0.014 1994 6246.8 9.5 6.35 827 50.1 65 < 0.010 1995 6248.5 8.9 6.48 830 41.2 72 0.020 1996 6248.3 9.8 6.39 940 42.3 81 0.030 1997 6248.2 10.1 6.33 971 51.3 76 0.010 1998 6248.2 9.7 6.24 1016 50.2 79 0.020 1999 6248.2 9.7 6.25 1017 49.9 85 < 0.010 2000 6247.3 10.2 6.36 1011 50.3 87 < 0.010 2001 6246.4 10.0 6.38 1017 51.3 86 0.040 2002 6246.5 10.0 6.34 967 41.3 90 0.030 2003 6246.8 9.9 6.44 960 36.6 91 0.020 2004 6246.3 9.7 6.43 907 32.4 93 0.020 2005 6247.4 9.4 6.47 828 29.7 90 0.026 2006 6247.9 9.7 6.47 918 27.7 92 0.018 2007 6246.5 10.3 6.37 956 27.6 102 0.018 2008 6244.7 10.8 6.55 872 22.9 93 0.021 2009 6245.5 10.3 6.18 759 20.1 77 2.988 2010 6246.4 9.3 5.80 528 21.7 48 5.659 2011 6247.4 9.3 5.96 489 12.2 26 0.140 2012 6246.4 9.7 6.28 724 17.8 0.074 2013 6245.2 10.4 6.54 823 17.6 0.016 2014 6245.1 10.0 6.34 690 20.3 0.795 2015 6244.3 10.6 6.43 761 19.5 0.011 2016 6246.0 9.5 5.75 430 17.5 6.728 2017 6248.6 9.9 6.22 348 11.3 0.294 2018 6247.1 10.1 6.68 597 19.7 0.028 2019 6247.3 10.2 6.71 659 21.2 0.036 Maximum 6248.6 10.8 6.71 1017 143.0 102 6.728 Minimum 6244.3 8.0 5.75 348 11.3 26 < 0.010 Average 6246.9 9.7 6.35 800 51.0 73 0.534 #Years 36 36 36 36 36 28 36 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/10/2020 Site: MW71 WATER QUALITY DATA Area: Buried Sludge MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/14/19 6267.86 7.8 6.12 210 22.7 0.047 04/16/19 6268.52 8.9 6.03 184 17.3 0.051 08/02/19 6269.55 8.6 6.06 203 25.4 0.033 10/22/19 6268.68 8.9 6.22 241 38.5 0.039 Maximum 6269.55 8.9 6.22 241 38.5 0.051 Minimum 6267.86 7.8 6.03 184 17.3 0.033 Average 6268.65 8.6 6.11 210 26.0 0.043 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 1985 1986 1987 1988 1989 1990 1991 1992 6257.3 8.9 7.25 159 1.4 5.820 1993 6257.5 9.1 7.15 202 1.0 9.220 1994 6258.5 8.1 7.13 172 0.9 5.830 1995 6260.7 8.8 6.98 139 1.5 3.080 1996 6265.0 8.7 6.74 97 1.7 0.170 1997 6268.7 9.3 6.77 88 1.7 0.120 1998 6268.5 8.6 6.53 86 1.2 0.300 1999 6269.2 8.4 6.46 81 1.2 6 0.120 2000 6267.5 8.5 6.84 78 0.9 5 0.100 2001 6264.4 8.6 6.73 81 1.1 5 0.070 2002 6262.3 8.5 6.67 100 1.4 7 0.160 2003 6261.1 8.8 6.73 103 1.5 6 0.180 2004 6261.8 4.7 5.70 59 0.7 3 0.260 2005 6262.2 9.2 6.83 108 1.2 11 0.563 2006 6266.5 9.4 6.54 136 1.7 9 0.228 2007 6266.1 9.0 6.42 132 2.5 8 0.218 2008 6263.9 9.5 6.63 119 1.6 5 0.165 2009 6262.1 10.2 6.56 110 1.4 7 0.184 2010 6261.1 9.1 6.64 113 1.3 7 0.163 2011 6264.0 9.1 6.40 159 4.2 8 0.120 2012 6264.9 9.5 6.28 170 5.7 0.114 2013 6263.0 9.4 6.56 139 2.7 0.116 2014 6261.3 9.3 6.66 131 2.5 0.101 2015 6259.9 10.0 6.44 123 1.8 0.123 2016 6259.1 10.7 6.39 109 1.5 0.308 2017 6265.8 9.1 6.42 213 22.3 0.150 2018 6269.1 9.5 6.14 234 32.7 0.051 2019 6268.7 8.6 6.11 210 26.0 0.043 Maximum 6269.2 10.7 7.25 234 32.7 11 9.220 Minimum 6257.3 4.7 5.70 59 0.7 3 0.043 Average 6263.6 9.0 6.60 130 4.5 7 1.003 #Years 28 28 28 28 28 13 28 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4n0/2020 Site: MW12 WATER QUALITY DATA Area: Buried Sludge MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umtios mg/L mg/L mg/L Comments 01/14/19 6264.47 9.8 6.51 332 17.7 1.65 04/16/19 6283.70 9.8 6.43 416 18.5 2.66 08/02/19 6267.00 10.5 6.50 462 20.4 1.09 10/22/19 6264.57 11.2 6.61 413 19.2 1.33 Maximum 6283.70 11.2 6.61 462 20.4 2.66 Minimum 6264.47 9.8 6.43 332 17.7 1.09 Average 6269.94 10.3 6.51 406 19.0 1.68 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 1985 1986 1987 1988 1989 1990 1991 1992 6259.7 10.2 6.46 169 2.9 1.55 1993 6261.1 9.8 6.47 500 6.4 4.72 1994 6260.5 9.0 6.42 353 3.8 4.22 1995 6263.7 9.3 6.60 646 5.6 4.03 1996 6265.4. 9.4 6.48' 477 4.3 3.23 1997 6266.8 10.1 6.57 257 3.0 0.79 1998 6266.4 9.2 6.31 205 2.9 0.35 1999 6266.7 8.7 6.16 167 2.3 8 0.17 2000 6265.6 8.9 6.42 143 1.9 6 0.21 2001 6262.7 9.1 6.47 105 1.8 6 0.43 2002 6262.3 9.5 6.19 113 1.6 6 0.56 2003 6262.4 9.6 6.18 155 2.0 6 0.93 2004 6262.4 9.2 6.25 186 2.0 6 1.85 2005 6262.7 10.0 6.27 311 3.3 12 2.49 2006 6265.6 10.7 6.43 648 5.1 15 2.61 2007 6263.8 10.5 6.18 323 3.0 9 1.74 2008 6262.5 10.8 6.28 228 2.3 6 1.18 2009 6261.6 12.1 6.25 265 2.3 9 1.43 2010 6261.5 10.3 6.34 368 2.8 8 3.67 2011 6263.8 11.4 6.41 696 7.4 13 7.45 2012 6263.0 10.9 6.44 382 8.2 3.31 2013 6262.0 12.3 6.39 283 5.9 1.45 2014 6260.8 11.7 6.45 327 4.3 3.57 2015 6259.0 9.2 6.63 133 1.3 1.44 2016 6259.1 12.4 6.54 937 6.8 38.10 2017 6265.0 10.9 6.48 957 20.1 20.16 2018 6266.2 11.9 6.60 591 27.9 5.10 2019 6269.9 10.3 6.51 406 19.0 1.68 Maximum 6269.9 12.4 6.63 957 27.9 15 38.10 Minimum 6259.0 8.7 6.16 105 1.3 6 0.17 Average 6263.5 10.3 6.40 370 6.2 8 4.14 #Years 29 29 29 29 29 13 29 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/10/2020 Site: MW13 WATER QUALITY DATA Area: Buried Sludge MONITORING WELLS Mean Sea Temp EC Chloride COD NO3-N Date Level C pH umhos mg/L mg/L mg/L Comments 01/14/19 6256.40 6.0 7.03 626 34.3 2.22 04/16/19 6259.70 5.1 6.83 874 17.8 17.3 08/02/19 6256.49 10.0 6.94 684 39.9 3.58 10/22/19 6256.12 8.6 7.00 626 41.2 3.28 Maximum 6259.70 10.0 7.03 874 41.2 17.3 Minimum 6256.12 5.1 6.83 626 17.8 2.22 Average 6257.18 7.4 6.95 703 33.3 6.60 4 4 4 4 4 0 4 Mean Sea Temp EC Chloride COD NO3-N Year Level C pH umhos mg/L mg/L mg/L Comments 1984 1985 1986 1987 1988 1989 1990 1991 1992 6255.0 8.9 6.82 1071 12.1 6.79 1993 6256.8 7.3 6.85 1310 6.3 43.39 1994 6255.3 7.8 6.82 942 6.3 17.72 1995 6257.4 7.2 6.83 1053 5.9 20.43 1996 6257.9 7.9 6.85 827 3.6 8.71 1997 6257.9 8.4 6.79 814 4.9 6.16 1998 6258.0 7.6 6.78 802 3.7 5.16 1999 6257.9 7.4 6.88 746 4.0 23 4.23 2000 6257.1 6.7 6.91 689 2.9 14 2.57 2001 6255.8 6.8 6.76 708 4.3 19 3.99 2002 6256.2 7.1 6.90 801 4.2 21 10.08 2003 6256.8 7.5 6.95 904 4.6 21 14.79 2004 6256.5 7.6 6.86 666 4.1 19 10.62 2005 6257.2 7.6 7.04 728 5.4 21 10.27 2006 6257.5 8.2 6.83 828 4.0 23 10.71 2007 6256.5 7.8 6.89 748 4.9 19 9.65 2008 6256.9 9.0 6.91 722 6.4 14 10.04 2009 6255.2 8.1 6.89 674 9.1 17 8.93 2010 6256.4 7.7 6.95 750 9.8 20 14.14 2011 6257.2 8.1 6.80 844 15.4 23 17.37 2012 6256.0 7.6 7.00 685 19.4 11.04 2013 6255.8 8.8 7.17 695 19.2 7.03 2014 6255.3 8.7 7.03 615 18.5 4.18 2015 6254.0 9.0 6.82 617 20.9 2.50 2016 6256.1 8.5 6.79 744 23.2 21.59 2017 6258.0 7.3 7.22 812 21.7 11.15 2018 6257.2 7.8 7.22 633 28.3 4.40 2019 6257.2 7.4 6.95 703 33.3 6.60 Maximum 6258.0 9.0 7.22 1310 33.3 23 43.39 Minimum 6254.0 6.7 6.76 615 2.9 14 2.50 Average 6256.6 7.9 6.91 790 10.9 20 10.87 #Years 28 28 28 28 28 13 28 SOUTH TAHOE PUBLIC UTILITY DISTRICT 4/9/2020 Site: ERB Area: Emergency Pond MONITORING WELLS Temp EC Chloride COD NO3-N Date C pH umhos mg/L mg/L mg/L Comments 04/16/19 7.2 7.69 298 31.1 0.136 11/22/19 10.1 7.53 663 57.3 0.214 11/27/19 2.2 7.67 673 58.0 0.211 Maximum 10.1 7.69 673 58.0 0 0.214 Minimum 2.2 7.53 298 31.1 0 0.136 Average 6.5 7.63 545 48.8 0.187 3 3 3 3 0 3 Temp EC Chloride COD NO3-N Year C pH umhos mg/L mg/L m /L Comments 1984 1985 1986 9.0 7.35 622 81.2 66 0.580 1987 10.7 7.30 575 62.1 192 0.200 1988 4.6 6.50 713 108.9 35 1.240 1989 1990 6.85 325 25.8 125 0.080 1991 1992 1993 17.1 7.15 551 64.5 46 0.210 1994 20.7 9.47 484 72.2 20 0.100 1995 16.6 7.90 470 55.0 48 0.060 1996 12.2 7.33 434 40.9 29 0.540 1997 8.1 7.14 415 44.2 45 0.070 1998 21.9 6.63 556 44.9 24 0.040 1999 Dry 2000 2001 18.9 7.91 596 60.2 42 0.120 2002 Dry 2003 Dry 2004 3.0 3.37 17.4, 20.2 9 0.040 2005 15.4 7.59 599 57.9 39 0.798 2006 16.78 MG stored 2007 Dry 2008 3.51 MG stored 2009 16.4 7.25 569 60.4 61 0.084 2010 19.6 7.81 629 45 2011 4.8 7.63 481 37.4 26 0.108 2012 Dry 2013 Dry 2014 14.4 7.47 607 67.3 0.423 2015 Dry 2016 17.5 7.56 678 64.7 1.332 2017 1.1 6.84 86 9.9 0.109 2018 No Sample 2019 6.5 7.63 545 48.8 0.187 Maximum 21.9 9.47 713 108.9 192 1.332 Minimum 1.1 3.37 86 9.9 9 0.040 Average 12.6 7.23 505 54.0 53 0.333 #Years 19 20 20 19 16 19 ERB and Plant Monitoring Wells WATER LEVEL WATER LEVEL Mean Sea Level Mean Sea Level 6290 - - 6290 6285 6285 - • • 6280 6275 6280 6270 m 6275 m 6265 LL 6260 6270 6255 -t 6265 6250 6245 6260 szao —+—Control MW01.5 t MW02 —f—MW03 MW04 t MW07 —i—MW08 NITRATE-NITROGEN NITRATE-NITROGEN 30 t ' 25 6 i 5 20 J J 4 15 I: 3 10 5 — 1 �—Control t-MW01.5 —.&—MW02 t MW03 t MW04 t MW07 t MW08 ERB and Plant Monitoring Wells CHLORIDES CHLORIDES 100 150 90 _-_.- __ - 140 - - �— 130 80 — 120 70 110 100 60 90 50 80 70 40 E 60 30 50 40 20 30 10 20 10 �-Control t MW01.5 t MW02 T MW03 - MW04 t MW07 t MW08 CONDUCTIVITY CONDUCTIVITY 1000 --- _._. 1200 900 --------- _---- -_- - --- -- 800 1000 700 600 800 t500 • L 600 E E 7 400 300 400 ----- - 200 200 100 L 0 0 --*--control --O--MW01.5 t MW02 -f-MW03 --e--MW04 --*---MW07 t MW08 Buried Monitoring Wells WATER LEVEL NITRATE-NITROGEN Mean Sea Level 50 --- -- 6280 - 45 - - - 6275 40 35 6270 30 _ 6265 25 N N G LL 6260 C20 15 6255 10 6250 5 gg 6245 0 —40—MW11 —+—MW12 fMW13 -MW11 --.&—MW12 MW13 CHLORIDES CONDUCTIVITY 35 _. __ 1500 -- 1400 - - 30 1300 1200 -25 ---- 1100 -- -- l000 900 J 20 O 800 700 t5 - 3 600 500 10 400 300 5 200 100 --,*,—MW11 —MW12 tMW13 —4P,—MW11 —MW12 —�MW13 HARVEY PLACE RESERVOIR SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: January 1,2019 To: December 31,2019 Temp NH3+ NH3-N Org-N TKN NO3-N NO2-N Total N PO4-P Total P Alk MBAS D.O. D.O. % Date pH C NH4 mg/I mg/I mg/I mg/I mg/I mg/L mg/1 mg/I mg/I mg/I mg/I Saturation 1/3/2019 7.83 4.0 29.3 0.227 0.0 29.0 0.778 0.523 30.3 2.90 3.22 191 9.09 84.3 2/7/2019 7.84 2.0 29.0 0.195 0.0 29.0 0.980 0.412 30.4 2.70 2.81 177 10.94 96.4 3/4/2019 8.11 5.2 21.7 0.350 1.3 23.0 0.855 0.321 24.2 1.99 2.22 145 9.04 88.4 4/1/2019 9.08 9.1 19.9 3.44 1.3 21.2 0.744 0.213 22.2 1.84 2.15 134 NV NV 5/8/2019 7.68 16.0 19.8 0.276 0.0 19.2 0.727 0.201 20.1 2.06 2.19 133 4.05 50.2 5/22/2019 7.42 12.1 6.68 76.7 6/3/2019 7.62 16.4 18.0 0.225 0.0 17.8 0.693 0.218 18.7, 1.96 2.38 131 6.28 78.5 7/2/2019 7.76 20.3 19.1 0.436 0.0 19.1 1.09 0.249 20.4 2.68 2.62 137 6.76 91.7 7/9/2019 7.31 21.2 8.76 121 8/1/2019 8.03 22.2 16.9 0.804 2.5 19.4 0.784 0.562 20.7 2.95 3.22 140 4.78 67.3 9/5/2019 7.32 21.5 20.5 0.188 2.1 22.6 0.166 0.320 23.1 3.58 4.05 171 4.30 56.7 10/1/2019 8.86 12.1 23.6 3.24 1.7 25.3 0.840 1.40 27.5 3.58 3.63 184 16.2 185 11/4/2019 9.06 7.2 22.6 3.31 2.8 25.4 1.80 1.15 28.4 2.80 3.34 166 13.0 131 12/3/2019 8.19 3.9 23.0 0.400 2.2 25.2 0.898 0.618 26.7 2.45 2.82 170 7.30 67.8 Maximum 9.08 22.2 29.3 3.44 2.8 29.0 1.80 1.40 30.4 3.58 4.05 191 16.20 185 Minimum 7.31 2.0 16.9 0.19 0.0 17.8 0.17 0.20 18.7 1.84 2.15 131 4.05 50.2 Average 8.01 12.4 22.0 1.09 1.2 23.0 0.86 0.52 24.4 2.62 2.89 157 8.24 91.9 #Samples 14 14 12 12 12 12 12 12 12 12 12 12 0 13 13 SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: January 1,2019 To: December 31,2019 Coliforms Fecal Air Algae Weeds Total Fecal/E.coli Strep Temp SO4 Boron Date MPN MPN MPN C mg/L mg/L Comments 1/3/2019 No No 22.8 < 1 10.5 17.9 2/7/2019 No No 47.2 < 1 2.7 18.7 3/4/2019 No No 16.0 < 1 5.7 15.0 4/1/2019 Yes No 219 < 1 8.3 13.9 5/8/2019 Yes No 74.9 < 1 12.3 13.7 5/22/2019 6/3/2019 No No 124 < 1 17.4 12.9 7/2/2019 Yes Yes 548 2.0 23.2 13.6 7/9/2019 Yes No 28.4 8/1/2019 Yes No 1200 9.7 27.1 13.5 9/5/2019 Yes No 435 60.5 22.2 15.6 10/1/2019 Yes No 3560 27.2 12.2 19.8 11/4/2019 Yes Yes 7270 6.2 12.5 23.4 12/3/2019 Yes Yes 980 2.0 10.9 20.2 Maximum 7,270 60.5 28.4 23.4 Minimum 16 < 1 2.7 12.9 Average 1,208 9.5 14.9 16.5 #Samples 13 13 12 12 13 12 0 SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: 1989 To: 2019 Coliforms Fecal Air Algae Weeds Total Fecal/E coli Strep Temp SO4 Boron Year MPN MPN MPN C mg/L mg/L Comments 89 125 7 60 17.2 90 275 3 17 18.2 42.8 0.32 91 64 4 30 17.1 41.2 0.37 92 991 94 203 16.6 35.1 0.33 93 633 9 280 15.1 23.2 0.22 94 505 6 422 11.4 26.8 0.26 95 107 14 112 12.9 24.2 0.17 96 374 11 97 16.0 19.9 0.19 97 2 < 2 < 2 5.9 13.1 0.08 98 192 4 56 7.5 19.3 0.14 99 460 4 97 13.0 19.1 0.20 00 363 6 73 15.5 19.1 0.22 01 533 187 78 13.2 19.5 0.24 02 128 25_ 178 20.3 18.2 0.22 03 309 26 33 13.0 19.3 0.19 04 204 20 28 12.4 17.9 0.25 05 1,516 46 194 13.5 16.8 0.24 06 341 53 168 14.5 14.3 0.16 07 111 57 34 12.5 15.4 0.22 08 197 35 164 14.0 16.4 0.24 09 393 16 6 12.1 17.6 0.17 10 539 83 5 10.4 16.2 0.18 11 477 8 29 9.9 13.0 0.15 12 745 168 30 11.7 17.1 0.16 13 556 18 20 13.6 16.7 0.16 14 403 47 52 10.4 16.4 0.19 15 24,369 77 12.6 20.1 0.22 16 17,784 92 13.2 17.8 17 25,843 37 12.8 12.5 18 4,866 12 17.0 16.2 19 1,210 9.5 14.9 16.5 Maximum 25,843 187 422 20.3 42.8 0.37 Minimum 2 < 2 < 2 5.9 12.5 0.08 Average 2730 38 95 13.5 20.0 0.23 #Years 31 31 26 31 30 26 SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: 1989 To: 2019 Temp NH3+ NH3-N Org-N TKN NO3-N NO2-N Total N PO4-P Total P Alk MBAS D.O. D.O. Year pH C NH4 mg/I mg/I mg/I mg/1 mg/I mg/L mg/I mg/I mg/I mg/I mg/I %SAT 89 8.10 13.6 8.59 0.264 1.63 10.22 4.94 0.14 15.29 1.94 2.21 70 0.040 8.64 101.02 90 8.40 14.5 6.71 1.012 4.58 11.30 5.86 0.22 17.37 2.73 3.20 72 0.080 8.51 102.85 91 7.72 13.9 2.78 0.103 1.63 4.41 9.93 0.27 14.61 2.52 2.89 53 0.060 7.23 87.49 92 7.73 14.3 4.69 0.083 1.61 6.30 8.25 0.32 14.87 3.60 3.86 61 0.070 7.30 86.26 93 7.76 12.3 7.84 0.119 1.20 9.04 5.03 0.23 14.30 2.90 3.05 70 0.060 7.49 84.49 94 7.80 11.1 15.53 0.223 1.65 16.82 2.85 0.32 19.99 3.16 3.18 118 0.080 7.25 80.39 95 7.82 13.0 16.25 0.308 2.86 18.55 0.82 0.13 19.51 2.26 2.49 119 0.060 8.11 93.85 96 7.80 13.8 14.06 0.472 1.88 15.85 1.12 0.27 17.24 2.06 2.13 116 0.060 7.44 89.74 97 7.71 12.2 12.26 0.165 0.88 12.28 1.37 0.23 13.88 1.77 2.03 100 0.030 7.48 83.93 98 7.65 11.7 13.90 15.58 1.73 0.31 17.63 2.27 2.28 110 0.070 7.83 90.18 99 7.51 12.3 14.47 0.121 1.78 15.69 1.39 0.34 17.42 2.05 2.26 106 0.060 6.63 69.93 00 7.95 12.9 15.74 0.696 2.83 18.23 0.93 0.31 19.47 2.26 2.50 110 0.070 8.29 99.53 01 7.94 12.8 15.57 0.608 2.10 17.51 1.26 0.49 19.26 2.33 2.57 107 8.36 103.10 02 7.79 13.2 12.87 0.408 2.33 15.21 2.10 0.52 17.83 2.22 2.51 99 8.64 104.13 03 7.76 12.5 15.98 0.287 2.49 18.29 1.20 0.56 20.05 2.26 2.44 113 7.31 77.82 04 7.85 11.9 17.37 0.477 19.57 1.10 0.31 20.84 2.55 2.75 116 7.52 75.17 05 7.96 11.6 15.21 0.617 1.28 16.23 1.16 0.36 17.76 2.66 2.70 130 8.63 97.22 06 7.68 11.9 14.57 0.391 1.68 16.23 0.93 0.21 17.37 2.22 2.36 127 8.37 92.53 07 8.41 12.5 16.72 1.456 2.35 19.26 0.56 0.29 20.11 2.85 3.06 151 9.65 104.52 08 8.21 11.2 15.05 0.974 1.55 16.60 1.69 0.62 18.91 2.86 3.08 133 7.82 82.84 09 8.07 11.1 16.56 0.526 1.70 18.10 1.97 0.51 20.58 2.87 3.07 139 6.82 76.61 10 7.93 10.7 15.92 0.430 0.38 15.07 1.75 0.54 17.35 2.58 2.79 140 6.66 71.41 11 7.90 11.3 12.64 0.430 2.49 14.97 1.96 0.72 17.65 2.00 2.26 117 7.38 82.91 12 7.60. 12.0 15.36 0.291 17.90 18.20 2.90 0.61 21.70 2.53 2.59 133 6.54 72.70 13 8.17 11.4 12.02 0.943 5.51 17.53 3.87 0.60 22.01 2.13 2.44 113 8.97 94.88 14 8.23 11.3 14.45 1.106 2.50 16.95 2.80 0.49 20.24 2.56 2.98 130 7.37 77.79 15 7.86 12.0 15.23 0.388 2.63 17.86 4.84 0.45 23.13 2.64 2.87 124 8.55 95.65 16 7.59 12.8 15.87 0.243 2.37 18.23 3.21 0.77 22.18 2.61 2.91 130 8.46 95.98 17 7.77 11.3 12.62 0.222 4.85 17.30 1.68 0.85 19.83 1.79 2.41 107 8.38 91.41 18 7.85 13.3 22.31 0.399 1.90 24.13 0.83 0.42 25.33 2.78 2.91 163 8.56 92.16 19 8.01 12.4 21.95 1.09 1.16 23.02 0.86 0.52 24.39 2.62 2.89 157 8.24 91.9 Maximum 8.41 14.5 22.31 1.456 17.90 24.13 9.93 0.85 25.33 3.60 3.86 163 0.080 9.65 104.52 Minimum 7.51 10.7 2.78 0.083 0.38 4.41 0.56 0.13 13.88 1.77 2.03 53 0.030 6.54 69.93 Average 7.89 12.4 13.91 0.495 2.75 15.95 2.61 0.42 18.97 2.47 2.70 114 0.062 7.89 88.72 #Years 31 31 31 30 29 31 31 31 31 31 31 31 12 31 31 SOUTH TAHOE PUBLIC UTILITY DISTRICT HARVEY PLACE RESERVOIR DATA SUMMARY From: 1989 To: 2019 Water COD BOD Cl- TDS SS Turb EC Ca Na Mg SAR Level Flow % Ice Year mg/I mg/I mg/I mg/I mg/I NTU uS/cm mg/I mg/I mg/I ft. acre-ft Cover 89 25.3 2.95 89.2 357 21.37 18.87 635 19.6 92.9 3.26 4.88 38.1 491 5 90 32.4 4.92 93.5 355 9.33 5.82 616 16.6 86.2 3.41 5.04 40.9 303 4 91 23.9 3.82 91.7 369 20.36 5.99 595 16.4 84.3 3.55 4.91 38.5 4 92 28.0 4.25 72.0 312 7.83 3.88 496 16.2 72.7 3.28 4.31 39.1 6 93 29.1 5.92 53.2 241 29.42 5.63 413 14.9 45.5 3.26 2.71 42.5 17 94 27.8 6.01 70.2 268 7.56 3.82 548 18.5 53.3 3.86 2.94 38.4 10 95 25.1 4.70 50.8 226 7.09 3.87 482 16.3 41.3 3.53 2.41 42.5 1 96 23.7 4.53 47.3 225 4.81 3.53 462 16.4 46.4 3.58 2.70 43.8 0 97 18.6 2.93 44.5 205 7.07 5.98 415 14.8 38.0 3.38 2.28 45.4 0 98 20.6 3.53 49.6 226 5.20 3.67 461 15.0 43.4 3.31 2.64 41.9 12 99 27.7 4.19 48.8 221 11.53 5.25 450 14.4 42.1 3.42 2.59 40.7 2 00 31.9 6.21 53.6 227 16.80 3.67 466 15.7 44.6 3.53 2.68 41.0 0 01 43.8 5.79 61.3 243 26.09 7.40 490 16.2 45.8 3.68 2.67 40.9 3 02 29.7 5.23 57.5 237 9.32 4.04 466 15.4 44.8 3.51 2.68 37.4 0 03 31.3 4.75 56.8 235 8.38 4.14 484 15.3 45.2 3.53 2.71 40.9 0 04 31.3 4.53 57.9 236 5.81 4.08 504 16.0 43.5 3.69 2.54 38.1 3 05 35.9 6.81 52.7 242 11.57 4.48 447 16.4 46.4 3.50 2.70 38.7 16 06 39.9 7.35 44.3 222 17.56 12.67 397 14.5 42.4 3.29 2.60 38.8 12 07 45.3 9.14 53.3 257 13.78 7.40 515 17.1 54.1 3.80 3.08 36.8 1 08 47.0 9.62 52.6 248 14.55 8.09 495 16.2 52.1 3.73 3.03 37.7 8 09 40.2 7.48 50.9 251 8.97 5.17 530 16.7 52.8 3.92 2.95 37.7 0 10 40.8 8.42 48.5 247 8.41 5.14 514 16.8 24.0 4.07 1.37 39.3 12 11 39.8 8.14 42.6 218 24.21 12.21 435 16.2 22.4 3.71 2.50 41.2 8 12 8.13 50.2 245 21.83 6.58 501 17.3 49.9 3.78 2.83 34.8 0 13 9.01 48.7 246 17.10 8.06 457 17.3 49.5 3.81 2.80 37.2 13 14 8.53 51.6 259 12.69 6.71 516 18.0 52.3 4.06 2.89 39.5 5 15 11.52 52.2 269 62.20 10.78 534 18.0 53.4 4.20 2.95 32.4 5 16 7.57 56.5 257 17.91 4.86 536 18.2 53.5 4.11 2.94 37.3 10 17 14.61 42.2 207 45.88 36.23 466 15.8 39.0 3.80 2.28 39.8 6 18 7.75 56.8 255 4.91 3.13 574 19.6 50.8 4.58 2.68 38.3 0 19 10.2 57.5 251 13.2 6.38 558 18.9 50.4 4.47 2.70 36.7 4 Maximum 47.0 14.61 93.5 369 62.20 36.23 635 19.6 92.9 4.58 5.04 45.4 491 17 Minimum 18.6 2.93 42.2 205 4.81 3.13 397 14.4 22.4 3.26 1.37 32.4 303 0 Average 32.1 6.73 56.7 253 15.89 7.34 499 16.6 50.4 3.70 2.94 39.2 397 5 #Years 23 31 31 31 31 31 31 31 31 31 31 31 2 31 NO3-N&NH3-N Total Phosphorus 25 6 20 5 4 15 J J rn rn 3 E E 10 2 5 1 0 0 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 T NO3-N t NH3-N Total Phosphows Linear(Total Phosphorus) Chlorides Total Dissolved Solids 140 500 120 450 400 100 350 J 80 J 300 01 250 60 E 200 40 150 100 20 50 0 0 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 —r—cmonaes linear(cmoeaes) -- TOs LIoear(T0s) 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 E:IHPMHPR Current Storage Lahontan_Report Acre-feet N N W W -P. C31 O C7i O 6 O In O O O O O O O O O O 01/16 02/16 03/16 04/16 05/16 06/16 07/16 O8/16 09/16 10/16 T 11/16 /� 2 12/16 01/17 0 02/17 n 03/17 _ 04/17 (p 05/17 Q 06/17 07/17 08/17 0 09/17 rF 10/17 (D T 11/17 12/17 01/18 v 02/18 03/18 m 04/18 C 05/18 -' 06/18 07/18 08/18 09/18 10/18 4< 11/18 12/18 01/19 02/19 03/19 04/19 05/19 06/19 07/19 08/19 09/19 10/19 11/19 12/19 INDIAN CREEK RESERVOIR INDIAN CREEK RESERVOIR MONITORING Indian Creek Reservoir(ICR) is a 3,160 acre-foot capacity fresh water reservoir, located in the northeast portion of Alpine County, California (Figure 1). The ICR was constructed in 1967 for the temporary storage of treated wastewater. Since 1989, all make-up water for the ICR has been provided by fresh water diversions from Indian Creek and the West Fork of the Carson River. In 2002, the Lahontan Regional Water Quality Control Board (LRWQCB) adopted draft amendments to the water quality control plan for the Lahontan Region. These amendments included Interim Target and Final Target Total Maximum Daily Load (TMDL) numerical limits for five (5) indicator parameters at the ICR: Total Phosphorus (TP); Dissolved Oxygen (DO); Secchi Depth; Chlorophyll a; and Carlson Trophic State Index(TSI). In 2005, Alex Horne Associates consultant completed a pre-design for an in-reservoir oxygenation system (a hypolimnetic oxygenation system or HOS) for the ICR. Operation of the oxygenation system is designed to improve water quality by reducing phosphorus and chlorophyll a levels; improve fisheries habitat by increasing DO content within the hypolimnion; and lower the TSI of the ICR. ICR TMDL Objectives Indicator Interim Target Final Target (Attained by 2013) (Attained by 2024) Total Phosphorus :50.04 mg/L, annual :50.02 mg/L, annual mean (TP) mean Dissolved Oxygen 30-day mean — 6.5 Whichever is most restrictive: (DO) mg/L i) DO depressed not more than 7-day mean min. — 5.0 10%; mg/L ii)DO % Saturation >_ 80%; or 1-day min. — 4.0 mg/L iii) DO >_7.0 mg/L Secchi Depth (SD) Summer mean >_ 2 meters Chlorophyll a (Chl- Summer mean <_ 10 mg/cu meter a) Trophic State Index Composite index <_ 45 units (TSI) The HOS is comprised of a Speece Cone, which was installed at ICR in Nov/December 2008. The equipment building, electrical and controls instrumentation installation was completed near the start of the 2nd quarter of 2009. Regular operation of the HOS started in June 2009. ICR-01 ,--- ., ICR-06 `.r • y x , s CR . 4p a rl r 84 ar - •03 4 r „ ICR-09 ICR-11 ICR-05 ICR-12 =;. . . ti - SOUTH TAHOE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY 2019 Secchi NH3+ Depth Total P D.O. D.O. Chlorophyll Depth NH4 NH3-N Org-N TKN NO3-N NO2-N Total N PO4-P Date Site Ft_ mg/I mg/I %SAT mg/m' ft. mg/L mg/I mg/I mgll mg/I mg/I mg/L mg/I 01/16/19 ICR-01 Frozen 02107/19 ICR-01 No access 03121/19 ICR-01 0.5 0.038 10.70 87.8 10 3.30 <0.020 0.00 0.412 0.412 <0.010 <0.010 0.412 0.010 03/21/19 ICR-01 21.1 0.022 10.90 89.2 10 <0.020 0.00 0.450 0.450 <0.010 <0.010 0.450 0.018 03/21/19 ICR-01 39.0 0.057 10.30 83.0 15 <0.020 0.00 0.515 0.515 <0.010 <0.010 0.515 <0.010 03121/19 ICR-03 0.5 0.040 11.00 90.8 10 3.10 <0.020 0.00 0.414 0.414 <0.010 <0.010 0.414 <0.010 03/21/19 ICR-03 23.8 0.044 10.60 85.7 10 <0.020 0.00 0.424 0.424 <0.010 <0.010 0.424 <0.010 03/21/19 ICR-05 0.5 0.033 10.80 88.0 7 3.60 <0.020 0.00 0.422 0.422 <0.010 <0.010 0.422 <0.010 04/18119 ICR-01 0.5 0.032 9.19 85.0 3 3.40 <0.020 0.00 0.474 0.474 <0.010 <0.010 0.474 <0.010 04/18/19 ICR-01 21.0 0.040 8.75 78.2 4 <0.020 0.00 0.514 0.514 <0.010 <0.010 0.514 <0.010 04/18/19 ICR-01 42.0 0.051 8.18 72.8 4 0.025 0.00 0.532 0.557 <0.010 <0.010 0.557 <0.010 04/18/19 ICR-03 0.5 0.037 9.15 85.9 3 3.70 <0.020 0.00 0.464 0.464 <0.010 <0.010 0.464 <0.010 04/18/19 ICR-03 27.0 0.043 8.35 74.7 5 <0.020 0.00 0.518 0.515 <0.010 <0.010 0.518 <0.010 04/18/19 ICR-05 0.5 0.033 9.32 86.5 5 2.90 <0.020 0.00 0.506 0.506 <0.010 <0.010 0.506 <0.010 05/28/19 ICR-01 0.5 0.041 10.90 104.0 76 2.50 <0.020 0.00 1.070 1.070 <0.012 <0.011 1.070 <0.010 05/28/19 ICR-01 21.0 0.041 9.91 92.6 56 <0.020 0.00 0.887 0.887 <0.012 <0.011 0.887 <0.010 05/28/19 ICR-01 42.0 0.054 9.04 84.1 32 <0.020 O.OD 0.856 0.855 0.013 <0.011 0.855 <0.010 05128/19 ICR-03 0.5 0.037 10.80 104.0 83 2.40 <0.020 0.00 1.080 1.080 <0.012 <0.011 1.080 <0.010 05/28119 ICR-03 27.0 0.041 9.62 89.9 32 <0.020 0.00 0.719 0.719 0.012 <0.011 0.731 0.011 05/28/19 ICR-05 0.5 0.041 11.10 108.0 90 2.40 <0.020 0.00 1.010 1.010 0.013 <0.011 1.140 <0.010 O6/20/19 ICR-01 0.5 0.032 7.46 82.3 21 4.80 0.148 0.03 0.644 0.792 <0.010 <0.010 0.792 <0.010 06/20/19 ICR-01 18.1 0.040 7.11 76.9 <2 0.148 0.02 0.640 0.788 <0.010 <0.010 0.788 <0.010 06/20/19 ICR-01 36.2 0.044 5.23 53.3 5 0.306 0.00 0.734 1.040 0.012 <0.010 1.050 <0.010 06/20/19 ICR-03 0.5 0.032 7.29 78.9 5 6.60 0.147 0.03 0.702 0.849 <0.010 <0.010 0.849 <0.010 06/20/19 ICR-03 22.1 0.043 0.66 6.7 4 0.273 0.00 0.690 0.963 <0.010 <0.010 0.963 <0.010 06/20/19 ICR-05 0.5 0.027 7.30 78.3 5 5.80 0.155 0.01 0.661 0.816 <0.010 <0.010 0.816 0.011 07/25/19 ICR-01 0.5 0.024 8.94 103.0 5 5.60 <0.020 0.00 0.604 0.604 <0.010 <0.010 0.604 <0.010 07/25119 ICR-01 21.0 0.031 5.24 58.5 1 0.158 0.02 0.574 0.732 0.012 <0.010 0.744 0.020 07/25/19 ICR-01 39.0 0.043 3.57 39.6 9 0.219 0.00 0.609 0.828 0.014 <0.010 0.842 <0.010 07/25/19 ICR-03 0.5 0.025 8.87 103.0 12 5.10 <0.020 0.00 0.638 0.638 <0.010 <0.010 0.638 <0.010 07/25/19 ICR-03 27.0 0.041 3.18 35.5 10 0.171 0.00 0.650 0.821 <0.010 <0.010 0.821 <0.010 07/25/19 ICR-05 0.5 0.024 8.82 101.0 5 4.90 <0.020 0.00 0.705 0.705 <0.010 <0.010 0.705 .<0.010 08/21/19 ICR-01 0.5 0.046 8.35 94.1 12 3.10 <0.020 0.00 0.699 0.699 <0.010 <0.010 0.699 <0.010 08/21/19 ICR-01 21.1 0.052 5.76 63.8 11 <0.020 0.00 0.704 0.704 <0.010 <0.010 0.704 <0.010 O8/21/19 ICR-01 36.0 0.065 4.71 52.1 10 <0.020 0.00 0.777 0.777 <0.010 <0.010 0.777 <0.010 08121/19 ICR-03 0.5 0.048 8.62 97.3 13 3.10 <0.020 0.00 0.719 0.719 <0.010 <0.010 0.719 <0.010 08/21/19 ICR-03 24.0 0.057 5.07 56.1 16 <0.020 0.00 0.762 0.762 <0.010 <0.010 0.762 <0.010 08/21/19 ICR-05 0.5 0.057 8.41 94.3 21 2.90 <0.020 0.00 0.790 0.790 <0.010 <0.010 0.790 <0.010 09/17/19 ICR-01 0.5 0.073 8.87 90.5 25 2.20 <0.020 0.00 0.907 0.907 <0.005 <0.010 0.907 <0.010 09/17/19 ICR-01 21.1 0.068 8.12 81.8 27 <0.020 0.00 0.941 0.941 <0.005 <0.010 0.941 <0.010 09/17/19 ICR-01 39.0 0.076 7.94 79.7 28 <0.020 0.00 0.916 0.916 <0.005 <0.010 0.916 <0.010 09/17/19 ICR-03 0.5 0.059 8.82 90.6 20 2.50 <0.020 0.01 0.894 0.894 <0.005 <0.010 0.894 <0.010 09/17/19 ICR-03 27.1 0.094 7.82 78.0 26 <0.020 0.00 0.99D 0.990 <0.005 <0.010 0.990 <0.010 09/17/19 ICR-05 0.5 0.073 8.90 91.3 24 2.20 <0.020 0.00 0.884 0.884 <0.005 <0.010 0.884 <0.010 10/23/19 ICR-01 0.5 0.037 9.47 84.6 <1 3.20 <0.020 0.00 0.675 0.675 <0.010 <0.010 0.675 <0.010 10/23/19 ICR-01 21.0 0.037 9.34 82.4 1 <0.020 0.00 0.640 0.640 <0.010 <0.010 0.640 <0.010 10/23/19 ICR-01 39.0 0.051 8.52 75.0 8 <0.020 0.00 0.765 0.765 0.012 <0.010 0.777 <0.010 10/23119 ICR-03 0.5 0.032 9.44 84.1 1 3.60 <0.020 - 0.00 0.670 0.670 <0.010 <0.010 0.670 <0.010 10/23/19 ICR-03 27.1 0.043 8.76 77.3 5 <0.020 0.00 0.774 0.774 0.013 <0.010 0.787 <0.010 10/23/19 ICR-05 0.5 0.037 9.44 84.3 1 3.60 <0.020 0.00 0.650 0.650 <0.010 <0.010 0.650 <0.010 11/18/19 ICR-01 0.5 0.038 10.10 84.1 7 3.20 <0.020 0.00 0.632 0.632 <0.010 <0.010 0.632 <0.010 11/18/19 ICR-01 21.0 0.036 9.92 82.1 7 <0.020 0.00 0.640 0.640 <0.010 <0.010 0.640 <0.010 11/18/19 ICR-01 38.9 0.091 9.68 80.0 12 1<0.020 O.OD 0.973 0.973 <0.010 <0.010 0.973 <0.010 11/18/19 ICR-03 0.5 0.032 10.00 84.2 8 3.30 <0.020 0.00 0.612 0.612 <0.010 <0.010 0.612 <0.010 11/18/19 ICR-03 24.1 0.033 9.74 80.6 10 <0.020 - 0.00 0.626 0.626 <0.010 <0.010 0.626 <0.010 11/18/19 ICR-05 0.5 0.035 9.91 83.3 13 3.30 <0.020 0.00 0.675 0.675 <0.010 <0.010 0.675 <0.010 12/10/19 ICR-01 0.5 0.037 10.80 79.4 5 3.30 <0.020 0.00 0.740 0.740 <0.010 <0.010 0.740 <0.010 12/10/19 ICR-01 18.0 0.038 10.60 78.3 7 <0.020 0.00 0.775 0.775 <0.010 <0.010 0.775 <0.010 12/10/19 ICR-01 39.0 0.040 10.50 78.1 4 <0.020 0.00 0.765 0.765 <0.010 <0.010 0.765 <0.010 12/10119 ICR-03 0.5 0.034 10.80 80.0 5 3.80 <0.020 0.00 0.760 0.760 <0.010 <0.010 0.760 <0.010 12/10119 ICR-03 24.0 0.035 10.60 78.8 5 <0.020 0.00 0.747 0.747 <0.010 <0.010 0.747 <0.010 12/10/19 ICR-05 0.5 0.034 10.70 80.2 5 3.70 <0.020 0.00 0.692 0.692 <0.010 <0.010 0.692 <0.010 Maximum 42.0 0.094 11.10 108.0 90 6.60 0.306 0.03 1.080 1.080 0.014 <0.011 1.140 0.020 Minimum 0.5 0.022 0.66 6.7 <1 2.20 <0.020 0.00 0.412 0.412 <0.005 <0.010 0.412 <0.010 Average 14.4 0.044 8.70 80.6 14.6 3.57 0.046 0.003 0.699 0.728 0.010 <0.010 0.731 0.010 #Measurements 60 60 60 60 60 30 60 60 60 60 60 60 60 60 SOUTH TAHOE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY 2019 Lake Depth Temp Alk MBAS COD BOD Cl TDS S.S. Turb EC Ca Na Mg BAR Level %Ice Dale Site Ft C pH mg/I mg/1 mg/I mg/I mg/I mg/I mg/I NTU uSlcm mgll mg/I mg/I ft. Cover Algae Weeds 01/16/19 ICR-01 Frozen 50 02/07/19 ICR-01 No access 03121/19 ICR-01 0.5 7.0 7.92 35.6 1.22 55 5.96 7.6 76.8 0 No No 03/21/19 ICR-01 21.1 6.7 7.11 35.8 1.20 57 6.44 7.8 75.3 03/21/19 ICR-01 39.0 6.2 7.05 35.6 1.19 60 16.1 11 75.4 03/21/19 ICR-03 0.5 7.1 7.69 35.6 1.18 63 5.72 7.5 75.3 03/21/19 ICR-03 23.8 6.3 7.71 35.8 1.18 58 7.44 8.6 75.4 03/21/19 ICR-05 0.5 6.7 7.70 35.8 1.18 56 5.68 7.3 75.2 04/18119 ICR-01 0.5 11.9 7.27 1.35 8.5 75.7 0 No No 04/18119 ICR-01 21.0 10.3 7.36 1.35 9.9 75.5 04/18/19 ICR-01 42.0 10.2 7.34 1.41 13 75.6 04/18/19 ICR-03 0.5 12.5 6.77 1.37 8.4 75.7 04/18/19 ICR-03 27.0 10.3 7.11 1.38 11 75.7 04/18/19 ICR-05 0.5 12.0 6.26 1.36 8.8 75.0 05/28/19 ICR-01 0.5 13.2 8.91 37.9 1.07 63 9.53 15 78.9 0 Yes No 05/28/19 ICR-01 21.0 12.3 8.86 37.7 1.05 60 8.57 11 78.6 05/28/19 ICR-01 42.0 12.1 8.71 38.3 1.04 61 13.0 13 79.0 05/28/19 ICR-03 0.5 13.7 9.06 37.3 1.04 64 11.1 15 79.3 O5/28119 ICR-03 27.0 12.3 8.13 37.5 1.04 67 8.07 12 78.8 05/28/19 ICR-05 0.5 13.9 7.94 37.5 1.03 63 10.9 16 79.4 06/20/19 ICR-01 0.5 20.2 8.80 1.43 4.4 82.3 0 yes no O6/20119 ICR-01 18.1 19.2 8.61 1.38 4.0 82.0 06/20/19 ICR-01 36.2 16.3 7.18 1.38 7.1 83.3 06/20/19 ICR-03 0.5 19.2 8.89 1.37 4.2 81.8 06/20/19 ICR-03 22.1 16.4 7.76 1.37 6.3 97.6 O6120/19 ICR-05 0.5 18.8 8.38 1.37 4.1 81.6 07/25/19 ICR-01 0.5 22.4 8.31 1.06 3.8 87.9 0 Yes Yes 07/25119 ICR-01 21.0 20.7 8.45 1.06 4.6 87.6 07/25/19 ICR-01 39.0 20.4 7.72 1.11 6.4 88.3 07/25/19 ICR-03 0.5 22.7 8.62 1.07 3.8 88.1 07/25/19 ICR-03 27.0 20.7 7.65 1.08 7.5 88.6 07/25/19 ICR-05 0.5 22.1 8.73 1.10 5.4 87.9 08121/19 ICR-01 0.5 21.2 7.32 40.7 1.24 56 8.76 9.9 88.0 0 Yes Yes 08121/19 ICR-01 21.1 20.4 7.94 40.5 1.23 52 13.4 12 86.7 08121/19 ICR-01 36.0 20.3 7.64 41.0 1.21 53 16.4 17 86.9 08/21/19 ICR-03 0.5 21.3 8.19 40.5 1.21 51 9.02 10 88.2 08/21/19 ICR-03 24.0 20.4 8.25 41.4 1.23 48 16.8 14 87.5 08/21/19 ICR-05 0.5 21.0 6.15 41.0 <1.20 55 11.7 13 87.1 09/17/19 ICR-01 0.5 16.3 8.80 <1.25 15 87.3 0 Yes Yes 09/17/19 ICR-01 21.1 15.7 8.74 <1.25 18 87.3 09/17/19 ICR-01 39.0 15.5 8.55 <1.24 19 87.2 09/17/19 ICR-03 0.5 16.7 9.10 <1.27 14 87.8 09/17/19 ICR-03 27.1 15.3 8.72 <1.24 20 87.2 09/17/19 ICR-05 0.5 16.6 8.53 1.24 15 87.4 10/23/19 ICR-01 0.5 10.4 8.67 1.43 5.3 86.0 0 Yes Yes 10123/19 ICR-01 21.0 9.8 8.72 1.44 5.9 86.0 10/23/19 ICR-01 39.0 9.7 8.44 1.43 9.1 86.3 10123/19 ICR-03 0.5 10.2 8.49 1.44 6.3 85.9 10/23/19 ICR-03 27.1 9.8 8.54 1.45 7.7 86.1 10/23/19 ICR-05 0.5 10.3 8.60 1.43 6.2 86.1 11/18119 ICR-01 0.5 7.6 7.96 43.2 1.23 71 6.95 5.6 89.9 0 Yes Yes 11/18/19 ICR-01 21.0 7.2 7.86 43.0 1.23 36 7.05 5.4 89.9 11/18/19 ICR-01 38.9 7.1 7.69 43.2 1.24 69 30.8 19 89.6 11118119 ICR-03 0.5 7.8 8.02 37.1 1.23 61 7.00 5.3 90.0 11/18119 ICR-03 24.1 7.2 7.91 46.1 1.22 58 6.50 5.7 90.0 11/18/19 ICR-05 0.5 7.8 7.99 44.3 1.22 69 7.08 5.6 90.1 12/10/19 ICR-01 0.5 2.7 7.53 1.30 6.0 88.7 0 Yes Yes 12/10/19 ICR-01 18.0 2.7 7.36 1.32 6.7 89.2 12/10/19 ICR-01 39.0 3.2 7.21 1.31 6.6 89.2 12/10/19 ICR-03 0.5 3.1 7.52 1.27 6.3 89.2 12/10/19 ICR-03 24.0 3.0 7.26 1.31 6.3 89.1 12/10/19 ICR-05 0.5 3.3 7.22 1.34 6.2 89.8 Maximum 42.0 22.7 9.10 46.1 1.45 71 30.80 20.0 97.6 50 Minimum 0.5 2.7 6.26 35.6 <1.03 36 5.68 3.8 75.0 0 Average 14.4 12.8 8.01 39.3 1.25 59 10.42 9.2 84.3 5 #Measurements 60 60 60 24 0 0 0 60 24 24 60 60 0 0 0 0 0 11 9 9 SOUTH TAHOE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY 2019 Coliforms Fecal Air Depth Total F-VE.cob Strap Tamp SO4 Boron Fe Mn Date Site Ft MPN MPN MPN C mg/L mg/L ug/L ug/L Comments O1/16/19 ICR-01 Frozen 02/07/19 ICR-01 No access 03/21/19 ICR-01 0.5 24 <1 8.9 1.33 03/21/19 ICR-01 21.1 1.32 03/21/19 ICR-01 39.0 1.32 03/21/19 ICR-03 0.5 15 <1 1.31 03/21/19 ICR-03 23.8 1.31 03/21/19 ICR-05 0.5 14 <1 1.30 04/18/19 ICR-01 0.5 6 <1 16.1 1.43 04/18/19 ICR-01 21.0 1.43 04118/19 ICR-01 42.0 1.44 04/18/19 ICR-03 0.5 3 <1 1.43 04/18/19 ICR-03 27.0 1.43 04/18119 ICR-05 0.5 6 <1 1.43 05/28/19 ICR-01 0.5 10 <1 18.4 1.09 05/28/19 ICR-01 21.0 1.09 05/28/19 ICR-01 42.0 1.09 05/28/19 ICR-03 0.5 11 <1 1.06 05/28/19 ICR-03 27.0 1.09 05/28/19 ICR-05 0.5 11 1 1.05 06/20/19 ICR-01 0.5 161 1 25.1 2.40 06/20/19 ICR-01 18.1 2.76 O6/20/19 ICR-01 36.2 3.21 06/20/19 ICR-03 0.5 105 <1 2.69 06/20/19 ICR-03 22.1 2.85 O6/20/19 ICR-05 0.5 36 1 2.96 07/25/19 ICR-01 0.5 73 <1 26.3 1.03 07/26/19 ICR-01 21.0 1.07 07/25/19 ICR-01 39.0 1.12 07/25/19 ICR-03 0.5 29 <1 1.03 07/26/19 ICR-03 27.0 1.06 07/25/19 ICR-05 0.5 980 <1 1.03 08/21/19 ICR-01 0.5 84 1 21.8 1.14 O8/21/19 ICR-01 21.1 1.13 O8/21/19 ICR-01 36.0 1.13 08/21/19 ICR-03 0.5 46 1 1.08 08/21/19 ICR-03 24.0 1.11 08/21/19 ICR-05 0.5 238 1 1.09 09/17/19 ICR-01 0.5 137 1 11.0 1.05 09/17/19 ICR-01 21.1 , 1.05 09/17119 ICR-01 39.0 1.06 09/17/19 ICR-03 0.5 161 1 1.08 09/17/19 ICR-03 27.1 1.07 09/17/19 ICR-05 0.5 147 <1 1.06 10/23/19 ICR-01 0.5 49 2 13.2 1.23 10/23119 ICR-01 21.0 1.25 10123/19 ICR-01 39.0 1.27 10/23/19 ICR-03 0.5 58 1 1.24 10/23/19 ICR-03 27.1 1.29 10/23/19 ICR-05 0.5 58 <1 1.26 11/18/19 ICR-01 0.5 20 <1 17.8 1.09 11/18/19 ICR-01 21.0 1.09 11/18/19 ICR-01 38.9 1.10 11/18/19 ICR-03 0.5 16 <1 1.08 11/18/19 ICR-03 24.1 1.08 11/18/19 ICR-05 0.5 38 <1 1.08 12/10/19 ICR-01 0.5 51 1 3.5 1.16 12/10/19 ICR-01 18.0 1.20 12/10/19 ICR-01 39.0 1.18 12/10/19 ICR-03 0.5 64 2 1.17 12/10/19 ICR-03 24.0 1.16 12/10/19 ICR-05 0.5 36 2 1.21 Maximum 42.0 980 2 26.3 3.21 Minimum 0.5 3 <1 3.5 1.03 Average 14.4 90 1 16.2 1.34 #Measurements 60 30 30 0 10 60 0 0 0 SOUTH TAHOE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY From: 1980 To: 2018 Secchi NH3+ Total P D.O. D.O. Chlorophyll Depth NH4 NH3-N Org-N TKN NO3-N NO2-N Total N PO4-P Year mgA mgA %SAT mg/m' ft. mg/L mg/I mgA mgA mgA mgA mg/L mgA 80 0.305 8.75 88.8 1.227 0.080 1.351 2.578 3.465 0.201 6.244 0.212 81 0.267 10.26 122.8 0.404 0.148 1.335 1.692 7.454 0.315 9.405 0.176 82 0.531 9.77 113.5 0.925 0.105 1.521 2.417 4.329 0.190 6.916 0.421 83 0.575 10.22 116.6 0.474 0.139 1.223 1.697 3.419 0.125 5.241 0.472 84 0.459 10.35 115.8 0.476 0.120 1.350 1.799 3.356 0.154 5.309 0.339 85 0.219 9.93 112.6 0.629 0.142 1.585 2.212 2.722 0.118 5.052 0.092 86 0.164 9.54 111.0 1.277 0.273 1.577 2.854 3.080 0.147 6.082 0.059 87 0.145 9.00 101.7 2.927 0.331 1.755 4.683 3.590 0.174 8.447 0.058 88 0.095 9.13 105.3 4.661 0.097 2.194 6.855 6.406 0.161 13.421 0.023 89 0.075 9.26 107.5 2.970 0.160 1.053 4.023 4.892 0.108 9.023 0.020 90 0.154 9.02 104.9 0.140 0.052 1.178 1.318 0.705 0.028 2.051 0.078 91 0.299 8.91 102.9 0.206 0.074 1.889 2.095 0.289 0.015 2.374 0.143 92 0.318 8.90 105.4 0.082 0.040 2.828 2.910 0.038 0.011 2.959 0.136 93 0.778 8.72 102.6 0.171 0.029 8.453 8.624 0.150 0.013 8.054 0.115 94 0.179 8.15 91.0 0.138 0.038 1.573 1.711 0.039 0.014 1.764 0.080 95 0.344 8.57 102.1 0.203 0.050 5.542 5.744 0.068 0.012 5.823 0.061 96 0.600 9.00 106.3 0.100 0.030 6.110 6.220 0.040 0.010 6.260 0.020 97 0.062 9.05 102.4 0.185 0.015 0.883 1.068 0.083 0.029 1.181 0.018 98 0.049 8.61 102.1 0.088 0.013 0.655 0.743 0.089 0.010 0.840 0.011 99 0.076 8.50 94.8 3.98 0.072 0.010 0.913 0.985 0.023 < 0.010 1.018 0.012 00 0.078 6.70 71.8 24.0 2.67 0.154 0.011 0.927 1.080 0.070 < 0.010 1.161 0.013 01 0.053 6.12 72.6 11.4 5.62. 0.054 0.011 0.860 0.913 0.010 < 0.010 0.933 0.015 02 0.048 6.76 74.2 13.3 7.47 0.078 0.016 0.825 0.903 0.038 < 0.010 0.951 0.015 03 0.044 7.87 86.6 14.2 8.21 0.119 0.024 0.759 0.881 0.033 < 0.010 0.922 0.013 04 0.042 6.43 74.5 15.6 10.25 0.105 0.013 0.845 0.941 0.030 < 0.010 0.982 0.015 05 0.043 7.25 80.4 9.7 6.50 0.094 0.011 0.870 0.964 0.043 < 0.010 0.988 0.013 06 0.069 6.54 69.4 13.9 5.15 0.160 < 0.010 0.621 0.781 0.045 < 0.010 0.836 0.015 07 0.057 6.66 76.1 14.8 4.72 0.106 0.013 0.899 1.005 0.031 < 0.010 1.047 0.013 08 0.071 6.66 80.2 21.0 3.77 0.076 '0.011 1.149 1.225 0.048 < 0.010 1.282 0.018 09 0.067 8.28 98.9 16.2 4.48 0.046 0.013 1.249 1.295 0.021 < 0.010 1.326 0.013 10 0.042 7.80 91.8 11.1 7.69 0.029 0.011 0.801 0.829 0.019 < 0.010 0.858 0.011 11 0.041 6.97 80.6 9.2 8.19 0.055 0.010 0.512 0.568 0.013 < 0.010 0.591 0.012 12 0.037 7.87 90.5 4.8 10.95 0.086 0.015 0.667 0.754 0.034 < 0.010 0.798 0.012 13 0.035 8.45 98.4 7.4 10.64 0.049 0.020 0.727 0.776 0.027 < 0.011 0.797 0.012 14 0.037 9.07 91.2 9.9 7.25 0.041 0.021 0.751 0.782 0.012 < 0.010 0.786 0.012 15 0.045 9.74 93.8 19.9 7.85 0.031 0.022 0.992 1.023 0.013 < 0.010 1.028 0.010 16 0.034 9.37 88.1 10.3 9.87 0.039 < 0.020 0.660 0.691 0.027 < 0.010 0.714 0.011 17 0.047 8.26 75.1 16.1 5.54 0.071 < 0.020 0.517 0.581 0.020 < 0.010 0.593 0.012 18 0.045 8.59 81.3 15.7 4.36 0.031 < 0.020 0.679 0.697 0.012 < 0.010 0.703 0.012 19 0.044 8.70 80.6 14.6 3.57 0.046 0.003 0.699 0.728 0.010 < 0.010 0.731 0.010 Maximum 0.778 10.35 122.8 24.0 10.95 4.661 0.331 8.453 8.624 7.454 0.315 13.421 0.472 Minimum 0.034 6.12 69.4 4.8 2.67 0.029 < 0.003 0.512 0.568 0.010 < 0.010 0.591 0.010 Average 0.167 8.44 94.2 13.7 6.61 0.471 0.056 1.524 1.991 1.120 0.051 3.137 0.070 #Years 40 40 40 20 21 40 40 40 40 40 40 40 40 Note:Chromogenic Substrate test for Total Coliform and E.coli begun in November 2014 SOUTH TAHOE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY From: 1980 To: 2018 Lake Temp Alk MBAS COD BOO Cf TDS S.S. Turb EC Ca Na Mg SAR Level %Ice Algae Weeds Year C pH mgA mg/I mgA mg/l mgA mgA mgA NTU uS/cm mgA mgA mgA ft. Cover 80 12.9 8.47 75 0.05 24.8 2.80 132.2 459 8.16 2.20 605 64.53 72.33 2.37 2.38 49.81 4 81 14.4 9.3 78 0.04 24.1 2.23 103.1 457 5.74 2.22 653 72.00 48.50 1.94 1.53 49.20 0 82 12.6 8.74 91 0.04 25.7 2.73 82.4 363 8.84 3.74 579 59.34 42.95 2.46 1.47 52.36 7 83 12.3 9.15 101 0.03 22.8 2.28 81.2 344 4.69 3.56 553 55.39 43.94 2.57 1.56 51.66 1 84 12.4 9.12 115 0.03 24.1 3.03 92.2 381 8.35 3.67 627 61.83 61.36 2.52 2.07 51.42 2 85 13.5 9.04 75 0.05 31.1 4.63 107 405 15.64 6.62 682 43.43 83.58 2.73 3.44 49.38 8 86 14.2 8.88 55 0.05 28.9 3.71 72.9 315 19.44 10.73 517 23.43 73.96 2.75 3.83 48.87 0 87 12.9 8.4 74 0.03 28.8 4.69 114 450 14.34 4.44 766 29.75 110.92 3.14 5.21 46.10 8 88 13.6 7.74 60 0.03 14.7 5.12 138 509 19.00 3.01 891 24.50 134.17 3.26 6.74 45.99 4 89 12.9 8.84 47 0.02 21.8 2.05 113 457 7.10 3.68 786 24.26 111.58 2.88 5.69 41.43 13 90 13.8 9.55 67 0.02 27.8 2.42 82.5 426 8.33 4.38 687 35.08 92.33 3.03 4.02 27.00 14 91 13.1 9.23 69 0.02 42.2 8.27 27.6 205 20.36 17.38 297 22.45 32.00 2.61 1.68 17 92 13.8 9.55 74 0.03 46.3 3.50 18.6 166 13.75 5.48 257 21.58 24.50 2.43 1.34 15 93 13.1 8.73 55 0.03 129.3 21.00 5.93 109 81.91 24.43 135 12.98 9.69 2.17 0.66 13 94 11.4 9.42 67 0.02 38.7 5.12 8.10 130 7.16 5.35 168 18.29 13.07 2.46 0.76 15 95 13.2 8.66 54 0.02 31.4 6.59 3.86 98 28.68 8.02 124 12.83 8.28 2.27 0.55 44.48 8 96 13.3 9.12 47 0.02 99.4 17.48 1.70 70 71.90 19.45 108 11.29 6.46 2.23 0.46 50.05 0 97 12.5 8.77 40 0.02 19.1 2.97 1.47 64 12.86 6.08 91 9.70 5.51 1.91 0.42 47.44 2 98 12.3 8.32 43 0.02 16.1 2.43 1.50 66 8.47 4.34 99 9.97 6.88 1.77 0.45 45.65 11 99 13.1 8.17 43 0.02 20.3 2.83 1.33 82 14.63 11.13 97 10.29 5.92 1.97 0.44 45.50 00 10.3 8.24 48 19.3 2.09 1.32 96 11.58 15.15 105 10.70 5.92 1.96 0.44 01 13.2 8.25 50 24.2 1.68 1.41 79 9.16 12.47 109 02 11.0 8.46 48 21 1.50 1.42 77 4.19 5.79 105 03 10.0 8.29 48 19.7 1.74 1.82 71 3.06 4.33 106 04 14.0 8.45 48 17.9 1.78 2.05 68 4.50 3.81 104 10.10 7.46 1.91 0.56 05 11.5 8.15 48 18.2 1.73 1.89 72 3.71 3.78 102 0 06 10.0 7.65 42 24.3 1.80 1.38 72 5.64 9.35 91 2 07 12.6 8.41 51 29.2 2.97 1.66 85 6.00 8.34 113 11.03 6.89 2.20 0.50 9 08 1.3.4 8.53 54 26.4 2.09 103 6.48 17.21 118 2 09 13.9 8.85 52 32.5 2.09 89 6.65 10.38 119 0 10 13.4 8.38 48 26.9 1.83 75 4.59 5.97 105 0 11 13.7 7.60 40 21.2 1.02 70 3.19 2.95 81 0 12 13.2 8.37 49 0.92 73 1.92 2.47 96 0 13 12.8 8.43 50 1.12 71 2.22 1.73 99 12 14 12.2 8.61 49 1.17 66 3.35 2.81 102 0 15 14.3 9.13 52 1.35 75 3.04 3.73 111 9 16 13.2 8.26 48 1.62 73 2.31 2.26 99 7 17 12.2 7.58 37 1.16 66 5.18 6.87 78 9 18 13.8 7.80 41 1.2 61 9.40 8.26 86 10 19 12.8 8.01 39 1.25 59 10.42 9.23 84 5 Maximum 14.4 9.55 115 0.05 129.3 21.00 137.9 509 81.91 24.43 891 72.00 134.17 3.26 6.74 52.36 17 Minimum 10.0 7.58 37 0.02 14.7 1.50 0.9 59 1.92 1.73 78 9.70 5.51 1.77 0.42 27.00 0 Average 12.8 8.57 57 0.03 31.2 4.33 30.4 176 12.15 7.17 268 28.47 43.79 2.41 2.01 46.66' 6 #Years 40 40 40 20 32 28 40 40 40 40 40 23 23 23 23 16 34 0 0 Note:Chro SOUTH TAHOE PUBLIC UTILITY DISTRICT INDIAN CREEK RESERVOIR DATA SUMMARY From 1980 To: 2018 Coliforms Fecal Air Total Fecal/E.coli Strep Temp SO4 Boron Fe Mn Year MPN MPN MPN C mg/L mg/L ug/L ug/L Comments 80 12.4 81 18.1 82 15.4 83 97 10 40 14.5 84 238 4 186 16.0 85 231 4 203 17.1 86 173 5 419 18.7 87 72 6 38 17.2 88 330 5 166 17.2 89 219 6 208 15.7 90 166 5 64 18.0 91 77 2 28 17.8 34.33 0.13 92 265 4 91 17.2 18.08 0.11 93 519 7 259 14.9 8.32 0.06 94 477 13 54 11.5 7.48 0.06 95 584 4 26 12.4 6.39 0.03 96 186 2 189 16.7 2.59 0.04 97 75 7 119 15.1 - 3.43 0.02 98 154 3 149 8.2 2.75 0.02 99 50 6 30 15.5 4.74 0.02 00 7 < 2 3 19.2 5.50 0.03 1,180 46 01 200 < 2 2 16.5 4.75 0.02 547 67 02 29 < 3 27 24.3 4.90 0.02 318 31 03 9 < 4 3 13.6 3.21 0.02 218 82 04 7 2 4 18.0 2.54 0.03 222 28 05 16 2 24 16.2 1.99 0.02 307 36 06 49 3 5 13.9 1.58 0.02 773 82 07 6 2 2 20.1 3.42 0.02 614 35 08 15 2 3 17.5 4.68 0.02 1,237 50 09 230 2 2 14.8 4.66 0.02 794 24 10 403 4 2 13.6 3.72 0.01 264 21 11 376 5 5 13.1 1.30 0.01 387 32 12 24 2 3 16.2 1.21 0.01 169 22 13 32 2 7 16.4 1.83 178 20 14 146 4 2 15.2 2.50 15 354 3 17.8 2.70 16 341 1 16.5 3.08 17 84 2 14.2 1.50 478 23 18 117 2 21.3 2.16 19 90 1 16.2 1.34 Maximum 584 13 419 24.3 34.33 0.13 1.237 82 Minimum 6 1 2 8.2 1.21 0.01 169 20 Average 174 4 74 16.1 5.02 0.03 512 40 #Years 37 37 32 40 29 22 15 15 Note:Chro INDIAN CREEK RESEREVOIR Total Phosphorus Chlorophyll a 0.20 50 40 0.15 M 30 J p► 0.10 E E cm • 0.05 — Y 10 A Y • Y 0.00 0 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 f Seriesl —Y--Chlorophyll a Linear(Chlorophyll a) Secchi Depth NO3-N & NH3-N 0 10 5 9 10 8 15 7 6 a 20 J a 5 0 25 E 4 30 3 LL 35 2 40 1 45 1 0 98 00 01 02 03 04 OS O6 07 OB 08 10 11 12 13 14 15 16 17 18 19 80818283848586878889909192939495969798990001020304050607080910111213141516171819 r Secchi Depth Linear(Secchi Depth) —�NO3-N --NH3-N INDIAN CREEK RESEREVOIR Chlorides Total Dissolved Solids 150 700 140 650 - 130 A 600 120 --- - 550 110 500 100 450 90 400 E 600 a 350 — 60 - - E 300 50 250 40 - 200 30 150 ' A 20 100 A A 10 50 — 0 080818283848586878889909192939495969798990001020304050607080910111213141516171819 80818283848586878889909192939495969798990001020304050607080910111213141516171819 —�—Chlorides Linear(Chlorides) —•--TDS Linear(TDS) pH 12 II 11 10 A ••♦ • K• • •�• s ' 7 6 5 4 80 8182 83 84 85 86 87 88 89 90 9192 93 94 95 96 97 98 9900 0102 03 04 05 06 07 08 09 10 11 12 1314 15 1617 18 19 —r PH ALPINE COUNTY MONITORING ALPINE COUNTY MONITORING This monitoring program was developed with the assistance of the U.S. Department of Agriculture's Soil Conservation Service and the California State Water Quality Control Board, Lahontan Region. In each category of sample (soil, groundwater, and surfacewater), the sites are reported with tables showing the monthly results for 2019 and the yearly averages since monitoring was initiated. Trends are plotted for parameters indicative of wastewater. Groundwater, surfacewater and,soil quality data for 2019 are summarized below. Fourteen new monitoring wells were drilled in Alpine County in 2011. These 14 new wells were first monitored monthly in 2012. Wells ACMW-20 thru ACMW-26 are required to be monitored in our reclamation permit. Several of these wells replaced domestic wells (GW-XX) and monitoring wells. In 2015 the regional Board reduced sampling frequency for all monitoring wells from monthly to quarterly. The Regional Board also replaced Total Coliform monitoring by the multiple tube fermentation method with E. coli monitoring using the Idexx Colilert QuantiTray method (chromogenic substrate). The water quality results obtained from monitoring wells ACMW-13 thru ACMW-19 provide data needed to evaluate potential changes in water quality from the use of new irrigation fields designed for the application and temporary storage of reclaimed wastewater in Diamond Valley. The 2005 Arsenic results for the GW sites (domestic wells or potable water wells) should be viewed with caution; these results may be invalid. Domestic wells that previously showed no Arsenic had detectable Arsenic during 2005. The domestic wells that had previously showed detectable Arsenic all had significant increases in the concentration of Arsenic. This did not happen in the monitoring wells. All monitoring wells had either no detectable Arsenic or had the same concentration of Arsenic as in previous years. Surfacewaters Nitrate-N for surface waters was performed using the Brucine method priorto March 1983. Beginning in March 1983, the cadmium reduction method was used for all Nitrate analyses on surfacewaters. For this reason, Nitrate-N data prior to 1983 should be used with caution. During 1997, a new sample type of bottle was used for dissolved nutrients, including Nitrate. These bottles were rinsed with HNO3. Due to the material of the sample bottles,the normal rinsing of the bottles was insufficient to remove all traces of Nitrate from the bottle. The spike in Nitrate results during 1997 can be attributed to this insufficient rinse. Beginning in 1998 the dissolved nutrient sample bottles were rinsed with HCI. Beginning in June 2000, Chloride, Nitrite-N, Nitrate-N, ortho-Phosphate-P and Sulfate were analyzed using ion chromatography. Starting in 2000, most surface water sites were sampled March-November, only.This may bias the annual averages to a higher value due to a higher percentage of months with irrigation occurring. Starting in 2001, monitoring was performed in irrigation ditches crossing the California / Nevada border. This was initiated following a request by the Nevada Department of Environmental Protection. Starting in 2002, a lower dilution was incorporated into the Total and Fecal Coliform test. This lowered the detection limit to 3 MPN/100mL. In 2015 The Regional Board replaced Total Coliform monitoring by the multiple tube fermentation method with E. coli monitoring using the Idexx Colilert Quanti-Tray method (chromogenic substrate). The detection limit for this test is 1 MPN/100mL. Soils In 2015 the Regional Board removed S8 from the list of soil sites to monitor. Sample Sites Site. 1_aEItude "t ongtfude ;t:oCatton "'Type`Sam�pie""° 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:\LahontanlSample Sites\Lahontan Report-Sample Sites 2019 Page 1 of 2 Sample Sites ;Site Lafifude, Longitude` L'ocafign ype. amp 6— '77 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 list 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 Celio 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 38.829076 -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 AI Tahoe Blvd) Monitoring Well MW12 38.9226200 -119.9683700 110 ft south of Biosolids Building Monitoring Well MW13 38.9206200 -119.9692200 125 It 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 Celio Tail water Ditch SW-16 38.866896 -119.783627 Drain Ditch @ Fairview Ln Ditch Reservoirs HPR 38.764500 -119.780450 Harvey Place Reservoir Reservoir DAI-ahontan\Sample Sites\Lahontan Report-Sample Sites 2019 Page 2 of 2 �S W-07 x �gc•aw.aw J.ecaw SW-15 4p ••3 �.ecMw:. m. :4 (S• O• }peraw-cxv • �� �pQf"t1 SW-0555 SW-13 �(W.12 •• _Mwo i Damontl sW-10 . F SW-06SW-08 ® • „r a: ,' G• �Mw09M • r a SW-04 cMw,x • Y" YAK SW-03 l ltl� • acuw-0 TY7AC�woa -0]D • Di --•_ � A cM�SW-01 'lch . J D�. r • �( s +ew 1w.Am HPIR • a SW-02 •t• EXPLANATION sw Surface Water 2 . . ICR-1 C' Ditch tj cR-3` Reservoir d MONITOR WELL Irrigation-Recyled-23 Water tj Irrigation-Blended Recycled Water " SOUTH TAHOE PUBLIC UTILITY DISTRICT o tsoo 3.00o s,000Feet RECYCLED WATER PROGRAM W MONITORING LOCATIONS ALPINE COUNTY,CA S Path:X.1GIS%IB_Alpine CountyVAlpine Co Monitoring_11 x17_15 Aug 2014 mxd ALPINE COUNTY SOILS Site S2a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Celio Type: KT 2019 Inches: 06-12 EC TKN NO, P PZOS K KZO Cu Mo SO4 CEC Ca Na Mg Exch Cl Exch P Date pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg Mg.Kg men00g m /L m /L m /L SAR Na% m /L m /L 01/16/19 7.95 10.4 75.4 5550 8.50 648 1,480 3,160 3,810 29.9 0.08 350 35.8 241 1170 277 12.2 14.1 3,180 15.2 05/07/19 8.30 2.93 70.1 3840 6.23 557 1,270 3,380 4,070 24.6 0.06 105 30.3 105 573 71.7 10.6 12.3 1,050 4.56 07/08/19 8.03 7.18 49.5 2460 3.69 607 1,390 2,300 2,770 19.6 0.08 65 29.4 218 365 360 3.53 3.71 2,670 13.4 10/29/19 8.10 6.03 64.7 4000 4.68 715 1,640 1,510 1,820 19.9 0.04 120 17.3 152 511 113 7.65 8.93 1,900 36.6 Maximum 8.30 10.4 75.4 5550 8.50 715 1,640 3,380 4,070 29.9 0.08 350 35.8 241 1170 360 12.2 14.1 3,180 36.6 Minimum 7.95 2.93 49.5 2460 3.69 557 1,270 1,510 1,820 19.6 0.04 65 17.3 105 365 71.7 3.53 3.71 1,050 4.6 Average 8.10 6.64 64.9 3963 5.78 632 1,445 2,588 3,118 23.5 0.07 160 28.2 179 655 205 8.50 9.76 2,200 17.4 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site S2a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Cello Type: KT From: 1981 Inches: 06-12 To: 2019 EC TKN NO3 P P2O1 K K2O Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Year pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg me/long mg/L mg/L mg/L SAR Na% mg/L mg/L 1981 7.02 1.78 68.3 2,575 3.3 324 742 17,357 20,828 19 0.6 30 36 1982 6.95 1.38 66.9 3,487 3.7 666 1,525 15,155 18,186 18 0.4 37 28 1983 7.50 1.02 65.7 3,127 1.5 947 2,169 16,286 19,543 23 0.6 36 34 100 224 502 1984 7.97 1.59 62.7 2,585 1.7 664 1,521 14,255 17,106 17 0.3 13 29 92 126 53 2.52 2.4 350 1985 7.94 2.60 56.8 2,559 1.1 801 1,834 16,667 20,000 17 0.3 40 32 150 215 94 3.47 3.7 628 6.0 1986 7.86 3.00 63.7 2,827 1.0 818 1,873 13,183 15,820 17 0.3 104 33 157 276 103 4.10 4.5 658 6.9 1987 7.84 3.62 55.2 2,470 0.7 774 1,772 15,909 19,091 20 0.2 55 32 229 315 120 4.04 4.5 910 5.6 1988 7.76 5.90 63.0 2,938 1.0 815 1,866 13,183 15,820 19 0.2 132 32 323 597 218 6.20 7.3 1,625 7.6 1989 7.81 5.89 56.3 2,551 1.2 722 1,653 14,273 17,127 17 0.1 122 30 367 575 190 6.04 7.1 1,452 5.7 1990 7.87 5.81 58.3 2,491 1.2 696 1,594 13,875 16,650 13 0.1 109 31 328 566 190. 6.08 7.1 1,513 5.1 1991 7.82 5.24 59.8 2,592 1.6 826 1,891 13,417 16,100 12 0.2 106 33 286 553 213 5.72 6.8 569 7.2 1992 7.86 5.33 58.5 2,376 1.8 832 1,905 13,583 16,300 10 0.1 120 25 253 652 152 7.91 9.3 1,440 6.3 1993 7.96 5.60 57.3 2,440 1.6 788 1,805 13,250 15,900 7 0.2 175 28 238 691 171 8.42 10.0 922 10.7 1994 7.96 5.12 61.2 2,365 1.7 888 2,034 14,500 17,400 8 0.1 130 33 210 628 171 7.45 8.7 1,382 5.5 1995 8.00 3.23 53.3 2,217 3.4 851 1,948 13,771 16,444 14 0.7 48 36 164 356 100 5.41 6.3 740 5.4 1996 8.06 2.60 56.9 2,097 3.0 852 1,951 8 1.0 38 33 121 303 67 5.42 6.3 415 6.5 1997 8.19 1.85 69.2 2,346 2.4 833 1,908 8 1.0 83 34 69 246 43 5.61 6.5 399 4.3 1998 8.15 1.29 66.2 2,316 3.3 760 1,740 16 < 1.1 51 29 57 159 31 4.19 4.6 5.9 1999 8.11 1.38 63.5 2,433 8.0 903 2,067 17 1.5 41 33 60 168 28 4.47 4.9 5.0 2000 8.24 1.98 70.6 2,355 2.5 873 2,000 11,823 14,200 22 < 1.0 58 30 67 249 45 5.57 6.3 6.8 2001 8.24 2.13 64.1 2,200 3.0 758 1,735 11,550 13,875 29 1.8 48 32 69 315 55 6.90 8.0 455 5.8 2002 8.23 1.76 68.7 2,920 6.2 860 1,967 11,300 13,550 20 2.0- 60 31 60 241 39 6.13 7.0 299 6.5 2003 8.25 0.93 61.9 1,965 4.1 883 2,020 13,250 15,875 22 1.0 33 31 53 121 26 3.37 3.5 177 7.3 2004 8.27 1.14 64.4 2,500 25.0 925 2,120 12,425 14,900 20 < 1.0 24 32 51 120 34 3.24 3.3 198 8.3 2005 8.03 1.50 60.7 1,745 2.1 948 2,170 13,050 15,675 23 < 1.0 16 32 69 151 45 3.46 3.6 302 9.1 2006 7.97 2.63 73.7 2,748 2.4 942 2,158 10,655 12,775 25 0.8 111 33 91 240 107 3.96 4.3 212 12.1 2007 8.06 1.41 67.5 3,035 1.8 929 2,128 6,948 8,325 21 0.1 35 67 157 51 3.52 3.7 263 10.7 2008 7.95 1.78 54.0 2,611 2.8 -793 1,815 2,003 2,400 15 0.1 32 77 218 51 4.65 5.2 249 17.7 2009 8.16 3.32 68.9 3,185 4.3 778 1,780 2,735 3,250 9 0.1 65 30 80 477 88 8.57 9.9 879 11.0 2010 8.11 1.50 65.5 2,928 2.9 765 1,750 2,341 2,775 16 0.1 47 34 70 173 44 3.94 4.2 179 8.1 2011 8.10 1.93 65.2 2,838 3.0 702 1,610 2,800 3,400 17 0.1 102 34 68 300 57 6.51 7.5 311 10.1 2012 7.75 2.22 62.6 3,133 5.2 716 1,638 2,186 2,600 14 0.1 115 34 92 276 50 5.90 6.8 383 15.1 2013 7.87 3.59 68.1 3,098 5.1 699 1,600 2,830 3,400 14 0.2 115 30 178 377 109 5.48 6.2 1,046 9.8 2014 7.95 5.69 67.3 3,260 4.4 635 1,455 2,593 3,100 15 0.2 146 34 246 627 186 7.38 8.6 786 5.9 2015 7.86 8.41 68.7 5,008 7.3 603 1,383 2,515 3,025 15 0.1 264 34 231 1344 414 12.00 13.7 2,329 8.5 2016 8.00 7.09 76.7 5,433 11.3 504 1,153 3,613 4,325 11 0.2 265 38 244 817 294 10.39 11.9 1,925 17.2 2017 7.92 6.87 69.8 4,068 6,7 455 1,043 1,969 2,375 9 0.1 331 31 283 705 277 7.13 8.3 1,847 10.2 2018 8.03 6.08 65.3 3,448 5.0 607 1,391 3,011 3,627 16 0.1 121 31 203 419 188 4.82 5.3 1,659 7.5 2019 8.10 6.64 64.9 3,960 5.8 632 1,440 2,590 3,120 24 0.1 160 28 179 655 205 8.50 9.76 2,200 17.4 Maximum 8.27 8.41 76.7 5,433 25.0 948 2,170 17,357 20,828 29 2.0 331.3 38 367 1344 414 12.00 13.7 2,329 17.7 Minimum 6.95 0.93 53.3 1,745 0.7 324 742 1,969 2,375 7 0.1 13 25 51 120 26 2.52 2.4 177 4.3 Average 7.94 3.41 63.9 2,852 3.9 763 1,747 9,739 11,682 16 0.5 96 32 154 395 120 5.79 6.6 859 8.5 #Tests 39 39 39 39 39 39 39 35 35 39 39 37 39 37 37 36 36 36 34 35 Site: S2a Ranch : Celio pH Salinity 10 10 _ - -- - - ---- - �_.. 9 9 - - -- 8 — 8 _ 7 - CL 7 _ in 5 E 4 6 3 - -- 5 -- - 2 1 4 —88 888RRR�RRRRRR —+—pH —Linear(pH) —+—Salinity —Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 50 15 40 0 30 V V 10 CO o � rn 20 5 10 0 0 080 ogo -t CEC —Linear(CEC) t-SAR Linear(SAR) Site S3a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Hall Type: SMB 2019 Inches: 06-12 EC TKN NO, P P2O1 K KO Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Date pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg m .K menoog m /L m /L mg/L SAR Na% m /L mg/L 01/16/19 6.01 0.599 40.3 2,380 6.60 477 1,090 1,090 1,310 16.7 0.05 28 20.6 25.9 42.8 11.5 1.76 1.27 250 8.83 05/07/19 5.70 0.377 36.1 1,990 1.30 429 982 2,340 2,820 22.7 0.07 41 18.8 49.9 25.9 7.68 0.980 < 1.00 175 10.1 07/08/19 5.63 0.324 33.6 1,860 2.15 557 1,270 960 1,160 17.6 0.06 42 21.2 27.8 24.3 7.10 1.06 < 1.00 225 7.07 10/29/19 6.42 0.445 32.4 1,620 0.570 553 1,270 1,530 1,840 16.1 0.02 14 19.9 54.7 42.3 14.2 1.32 < 1.00 525 7.15 Maximum 6.42 0.599 40.3 2,380 6.60 557 1,270 2,340 2,820 22.7 0.07 42 21.2 54.7 42.8 14.2 1.76 1.27 525 10.1 Minimum 5.63 0.324 32.4 1,620 0.570 429 982 960 1,160 16.1 0.02 14 18.8 25.9 24.3 7.10 0.98 < 1.00 175 7.07 Average 5.94 0.436 35.6 1,963 2.66 504 1,153 1,480 1,783 18.3 0.05 31 20.1 39.6 33.8 10.1 1.28 1.07 294 8.29 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site S3a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Hall Type: SMB From: 1981 Inches: 06-12 To: 2019 EC TKN NO3 P P2O1 K K2O Cu Mo SO4 CEC Ca Na Mg Exch Cl Exch P Year pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 1981 5.68 1.44 31.4 1,411 0.6 420 962 5,716 6,859 40 0.7 24 23 1982 5.81 6.96 31.3 1,225 3.0 720 1,649 15,887 19,064 37 0.5 33 19 1983 5.93 0.66 44.4 1,928 0.5 790 1,809 14,210 17,052 29 0.5 59 20 61 1984 5.69 0.58 37.9 1,378 0.7 732 1,676 16,818 20,182 20 0.4 32 15 42 34 3 1.21 0.5 54 1985 5.86 0.80 36.2 1,479 0.6 774 1,772 19,036 22,843 18 0.6 26 18 60 54 20 1.59 1.0 103 10.5 1986 5.64 0.73 41.3 1,685 0.7 705 1,614 17,510 21,012 19 0.4 25 19 51 54 17 1.66 1.5 111 12.7 1987 5.30 0.67 35.7 1,435 0.4 768 1,759 18,182 21,818 19 0.5 27 17 52 56 17 1.65 1.5 103 12.2 1988 5.67 1.51 43.2 1,898 0.5 761 1,743 17,600 21,120 21 0.5 49 18 123 139 32 2.96 3.0 265 15.1 1989 5.51 1.73 38.6 1,605 0.5 695 1,591 18,000 21,600 19 0.3 57 17 112 165 40 3.46 3.7 322 9.1 1990 5.84 1.73 35.7 1,613 0.7 720 1,650 16,500 19,800 13 0.3 41 18 99 172 35 4.00 4.4 331 9.0 1991 5.85 2.08 36.5 1,551 0.6 789 1,807 18,167 21,800 13 0.5 46 21 141 182 54 3.39 3.6 428 10.9 1992 6.11 3.47 36.3 1,411 0.9 803 1,838 17,333 20,800 12 0.3 44 20 255 264 100 3.70 4.0 388 16.8 1993 5.90 1.61 37.2 1,712 0.8 716 1,640 16,818 20,182 8 0.3 33 18 105 121 40 2.59 2.6 280 12.6 1994 5.92 1.65 36.1 1,153 1.1 798 1,826 18,167 21,800 9 0.2 33 19 128 168 84 2.72 2.8 521 13.2 1995 6.10 1.20 33.7 1,439 4.5 782 1,790 16,694 19,889 14 0.7 26 21 80 100 31 2.54 2.5 168 7.6 1996 6.37 0.76 35.8 1,427 2.9 826 1,892 9 1.0 17 20 47 74 17 2.40 2.2 124 9.2 1997 5.97 0.56 35.7 1,188 1.4 738 1,688 10 1.0 15 17 33 49 12 1.96 1.8 68 15.4 1998 6.10 0.45 35.9 1,292 1.6 1,010 2,310 18 < 1.2 13 17 32 34 11 1.45 1.3 15.3 1999 5.99 0.36 36.4 1,403 2.8 1,078 2,470 24 < 1.0 6 18 23 28 6 1.45 1.3 17.5 2000 6.33 0.45 36.2 1,278 1.3 1,085 2,485 16,675 20,000 31 1.3 8 18 26 46 9 2.00 1.6 16.5 2001 6.19 0.30 35.2 1,167 1.2 860 1,970 16,600 19,925 33 2.8 4 18 27 33 9 1.43 < 1.0 25 16.3 2002 6.07 0.44 33.8 1,362 3.6 925 2,115 16,450 19,775 30 2.3 9 18 29 30 10 1.23 < 1.0 52 18.7 2003 6.46 0.26 35.7 1,400 1.2 1,023 2,343 16,667 20,000 59 1.0 6 20 22 23 5 1.14 1.0 16 11.4 2004 6.17 0.37 33.1 1,200 1.7 1,040 2,380 17,275 20,725 31 1.3 9 20 24 30 8 1.38 1.0 31 15.1 2005 5.69 0.34 36.5 1,300 1.0 1,095 2,508 15,850 19,025 30 1.3 16 20 26 24 8 1.03 < 1.0 23 21.4 2006 5.75 0.33 33.7 886 2.2 1,008 2,307 12,893 15,467 35 0.7 16 18 27 21 8 0.88 < 1.0 25 13.2 2007 5.58 0.38 41.0 1,898 2.1 930 2,130 5,854 7,025 25 0.1 22 26 33 8 1.45 < 1.1 35 14.5 2008 5.62 0.29 34.9 1,322 1.5 730 1,673 1,174 1,400 17 0.1 18 22 21 7 1.01 < 1.0 23 12.5 2009 5.90 0.22 33.1 1,016 1.5 766 1,753 1,504 1,800 11 0.1 10 18 14 17 5 0.71 < 1.0 16 6.3 2010 5.67 0.26 40.9 1,701 2.2 704 1,613 1,438 1,700 17 0.1 26 21 16 20 6 1.06 < 1.0 27 8.5 2011 5.57 0.29 38.5 1,730 1.3 741 1,695 1,782 2,150 17 0.1 35 20 20 18 8 0.90 < 1.0 30 40.4 2012 6.10 0.33 34.4 1,557 0.8 654 1,500 1,040 1,267 15 0.2 42 19 43 14 8 0.65 < 1.0 15 10.3 2013 5.74 0.26 34.1 1,132 0.4 607 1,390 1,353 1,625 16 0.1 22 18 22 19 5 0.92 < 1.0 16 5.7 2014 5.97 0.38 32.4 997 0.5 691 1,585 1,508 1,825 16 0.2 21 17 23 36 7 1.73 < 1.4 17 5.6 2015 5.90 0.44 34.5 1,691 0.7 562 1,285 1,698 2,050 15 0.1 19 18 21 36 15 1.48 < 1.1 32 27.6 2016 5.69 0.31 34.1 1,878 3.5 556 1,275 1,812 2,175 15 0.2 10 18 15 33 4 1.96 1.7 28 32.2 2017 5.79 0.35 35.0 1,935 6.0 357 815 1,255 1,525 8 0.1 23 18 24 21 5 1.06 1.0 14 36.8 2018 5.89 0.46 38.1 2,073 1.7 537 1,230 1,800 2,168 13 0.1 59 21 24 43 12 1.95 1.7 157 9.0 2019 5.94 0.44 35.6 1,960 2.66 504 1,150 1,480 1,780 18.3 0.1 31 20.1 39.6 33.8 10.1 1.28 1.1 294 8.29 Maximum 6.46 3.47 44.4 2,073 6.0 1,095 2,508 19,036 22,843 59 2.8 59 . 23 255 264 100 4.00 4.4 521 40.4 Minimum 5.30 0.22 31.3 886 0.4 357 815 1,040 1,267 8 0.1 4 15 14 14 3 0.65 0.5 14 5.6 Average 5.88 0.77 36.2 1,480 1.6 769 1,761 10,936 13,121 21 0.6 26 19 52 62 19 1.78 1.7 125 14.8 #Tests 39 39 39 39 39 39 39 35 35 39 39 37 39 37 36 36 36 36 33 35 meg1100 g pH CDO O O O O -Al Ln C) V 00 co O 1981 1981 1982 1982 1983 1983 1984 1964 1985 1985 1988 1988 1967 1987 1988 198 1989 n 19898 1990 1990 1991 1991 1992 0• 1992 I 1993 1993 Tj 1994 m I 1994 1:95 x + 1995 96 I 1996 1997 >7 1997 .a 7998 = 1996 I 1999 (Q 1999 2000 m I 2000 2001 n 2001 r 2002 a) 2002 2003 r 2003 2004 41 2004 2005 n 2005 n 2006 v 2006 n 2007 = 2007 2008 2008 2009 2009 2010 2010 201 201 2012 2 20122 2013 2013 2014 201 201 S 201 5 201 2018 T 2017 2017 `V 2018 2018 A 2019 2019 r Y/ W SAR mS/cm O U1 O CT O � N W A Cl1 1981 1981 1982 1982 1993 1983 1984 1984 1985 1985 1986 1986 1987 1987 1988 1988 1989 1989 1990 O 1990 1991 a. 1991 1992 1992 1994 3• 19914 1994 3 1994 1995 D 1995 N y 1898 Q 1998 A 1997 (n 1997 1996 0 1998 1999 1999 2000 2000 2001 2001 2002 2002 r 2003 r 2003 y 2004 2004 2005 2005 D2006 O. y 2006 ? 2007 2007 2008 ,,;5; 2008 2009 2009 2010 2010 2011 2011 2012 2012 2013 2013 2014 2014 2015 2015 2018 2018 2017 2017 2018 2018 2019 2019 Site S4a S4a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Gansber Gansberg Type: DI DI 2019 Inches: 06-12 06-12 EC TKN NO, P P2O1 K KZO Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Date pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg.Kg me11009 mg/L m /L mg/L SAR Na% mg/L mg/L 01/16/19 6.42 0.605 36.3 1,780 5.11 987 2,260 1,660 2,000 18.6 . 0.04 29 17.8 21.6 53.8 8.20 2.50 2.31 325 6.72 05/07/19 6.72 0.411 40.8 2,470 8.68 797 1,820 1,540 1,860 19.7 0.07 28 19.0 45.5 31.7 5.12 1.19 < 1.00 325 7.53 07/08/19 6.03 0.560 50.5 3,970 9.05 740 1,690 2,240 2,700 18.6 0.05 43 23.8 23.1 21.3 10.7 0.92 < 1.00 250 70.7 10/29/19 6.32 0.465 38.2 2,050, 4.49 655 1,500 5,810 7,000 21.7 0.03 2 18.8 46.9 39.0 9.27 1.36 < 1.00 500 5.70 Maximum 6.72 0.605 50.5 3,970 9.05 987 2,260 5,810 7,000 21.7 0.07 43 23.8 46.9 53.8 10.7 2.50 2.31 500 70.7 Minimum 6.03 0.411 36.3 1,780 4.49 655 1,500 1,540 1,860 18.6 0.03 2 17.8 21.6 21.3 5.12 0.92 < 1.00 250 5.70 Average 6.37 0.510 41.5 2568 6.833 795 1,818 2,813 3,390 19.7 0.05 26 19.9 34.3 36.5 8.32 1.49 1.33 350 22.7 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site S4a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Gansberg Type: DI From: 1981 Inches: 06-12 To: 2019 EC TKN NO3 P PZ05 K K20 Cu Mo SO4 CEC Ca Na Mg Exch Cl Exch P Year pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 1981 5.80 0.92 47.0 1,533 1.2 206 472 20,757 24,908 28 1.4 17 14 1982 5.92 0.76 45.3 1,938 5.6 473 1,083 20,766 24,919 25 0.8 24 14 1983 6.37 0.36 44.3 1,907 1.5 440 1,008 19,075 22,890 28 0.5 22 16 39 51 89 1984 6.19 0.39 37.6 1,392 1.3 349 799 23,191 27,829 29 0.4 10 17 34 23 8 1.02 0.4 36 1985 6.18 0.41 37.7 1,710 0.8 455 1,042 23,075 27,690 27 0.3 9 19 33 34 7 1.39 0.8 52 6.4 1986 6.08 0.52 39.4 1,625 1.0 436 998 20,800 24,960 26 0.3 11 18 55 52 9 1.98 1.9 125 6.5 1987 6.23 1.00 38.4 1,837 0.6 354 811 24,455 29,346 29 0.3 14 17 91 68 20 1.78 1.5 262 10.6 1988 6.18 1.44 41.9 2,051 0.5 399 914 22,500 27,000 30 0.4 20 18 115 104 25 2.35 2.2 317 9.9 1989 6.35 3.26 39.2 1,920 0.7 311 712 23,455 28,145 28 0.2 34 17 219 205 48 3.22 3.3 699 11.1 1990 6.69 1.29 37.5 1,742 1.2 392 899 19,125 22,950 21 0.2 20 17 99 107 23 2.48 2.5 389 14.6 1991 6.57 0.97 38.1 1,860 2.4 381 872 21,667 26,000 20 0.3 12 20 65 82 15 2.38 2.2 171 11.4 1992- 6.55 0.98 37.8 1,765 1.5 419 960 21,917 26,300 20 0.3 12 19 72 78 15 2.10 1.8 183 12.3 1993 6.47 0.68 35.8 1,670 2.9 392 897 23,417 28,100 14 0.2 9 19 48 49 15 1.69 1.4 66 9.9 1994 6.53 0.67 35.8 1,381 2.4 423 969 22,500 27,000 14 0.1 10 18 46 65 10 2.25 2.0 214 9.7 1995 6.44 1.15 33.5 1,330 8.0 445 1,020 22,194 26,667 21 0.5 9 13 74 72 17 1.94 1.8 148 6.4 1996 6.82 1.13 36.6 1,594 7.4 470 1,078 14 1.0 11 18 75 91 17 2.39 2.4 82 14.6 1997 6.51 0.51 37.1 1,434 5.1 398 913 16 1.0 4 17 36 47 8 1.84 1.7 40 11.0 1998 6.58 0.81 35.7 1,235 5.0 620 1,420 28 1.2 6 17 45 72 10 2.61 2.4 12.0 1999 6.73 0.97 38.5 1,650 6.9 570 1,305 37 1.8 7 19 66 82 15 2.47 2.3 13.4 2000 6.94 1.63 39.0 1,725 6.6 568 1,300 22,800 27,350 46 < 1.0 16 19 77 136 21 3.55 3.7 19.0 2001 6.83 1.11 37.3 1,585 5.3 515 1,177 22,700 27,225 53 2.0 8 21 86 102 20 2.69 2.7 152 16.7 2002 6.49 0.46 37.3 1,753 3.8 555 1,272 17,300 20,750 40 1.8 3 19 38 47 9 1.85 1.7 52 19.4 2003 6.82 0.55 36.6 1,515 3.2 538 1,230 22,125 26,575 69 1.5 4 19 34 69 7 2.78 2004 6.33 1.09 33.6 1,428 3.8 595 1,363 23,775 28,525 44 1.0 7 19 24 65 16 2.58 2.4 80 11.8 2005 6.49 0.54 36.8 1,550 3.2 643 1,473 22,050 26,450 42 1.0 7 21 32 54 6 2.30 2.1 61 10.3 2006 6.17 0.43 41.7 1,711 8.8 639 1,463 18,460 22,150 42 1.0 6 19 30 41 6 1.88 1.5 29 13.9 2007 6.23 0.46 42.0 2,195 1.2 482 1,105 9,518 11,400 31 0.1 22 35 56 7 2.29 2.0 50 9.4 2008 6.34 0.51 34.4 1,270 2.1 335 765 5,049 6,050 23 0.1 18 31 65 6 2.75 2.6 60 6.5 2009 6.54 0.65 38.3 2,058 6.2 457 1,048 6,487 7,800 15 0.1 10 20 30 85 8 3.54 3.7 69 13.3 2010 6.54 0.63 38.8 2,000 5.1 366 835 5,847 7,025 25 0.1 19 20 30 57 6 2.44 2.4 54 9.1 2011 6.44 0.55 38.6 1,800 6.8 507 1,160 6,973 8,333 27 0.1 55 20 31 70 7 2.94 2.9 35 5.8 2012 6.85 1.16 38.3 2,023 5.8 415 948 5,630 6,750 23 0.2 41 19 57 141 14 4.47 5.0 195 6.5 2013 6.54 0.68 40.4 1,920 7.4 278 638 6,827 8,175 23 0.2 22 16 43 80 8 2.91 2.9 46 6.4 2014 6.46 0.60 37.8 1,835 7.9 348 798 5,579 6,700 24 0.2 19 17 38 72 8 2.89 2.8 28 8.3 2015 6.14 0.94 40.8 2,793 9.8 352 805 5,266 6,325 25 0.1 23 20 42 80 17 2.60 2.4 84 13.7 2016 6.68 1.36 43.0 3,410 11.1 288 658 6,676 8,000 20 0.1 23 22 68 138 19 3.56 3.7 182 19.0 2017 6.93 0.67 39.6 2,270 11.2 272 620 4,176 5,000 15 0.1 24 20 47 67 10 2.38 2.2 23 11.4 2018 6.83 0.76 38.8 2,390 7.9 688 1,577 2,178 2,624 17 0.1 37 18 43 72 11 2.63 2.5 253 8.9 2019 6.37 0.51 41.5 2,570 6.8 795 1,820 2,810 3,390 20 0.05 26 20 34 36 8 1.49 1.3 350 22.7 Maximum 6.94 3.26 47.0 3,410 11.2 795 1,820 24,455 29,346 69 2.0 55 22 219 205 48 4.47 5.0 699 22.7 Minimum 5.80 0.36 33.5 1,235 0.5 206 472 2,178 2,624 14 0.0 3 13 24 23 6 1.02 0.4 23 5.8 Average 6.46 0.86 38.8 1,830 4.6 450 1,031 15,746 18,894 28 0.6 16 18 56 76 13 2.46 2.3 142 11.5 #Tests 39 39 39 39 39 39 39 35 35 39 39 37 39 37 37 36 36 35 33 34 Site: S4a Ranch : Gansberg pH Salinity 10 5 9 4 -- - - 8 E 3 CL in E 2 6 -- -- 5 1 4 g ZZ., RRR RRRRRRRRRRR m��mm�mmm�a��W���p�$ rRRRRRRRRRRRRRRR t pH Linear(pH) t Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 50 - - - 15 40 - 10 _ — - ot 30 0 E 20 5 --- - 10 O ---o--CEC Linear(CEC) —+—SAR Linear(SAR) Site S5a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA . Ranch: Gansberg Type: HRB 2019 Inches: 06-12 EC TKN NO, P P2O1 K K2O Cu Mo SO, CEC Ca Na Mg Exch Cl Exch P Date pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg. mg/Kg mg/Kg mg.Kg me/100g m /L m /L m /L SAR Na% m /L m /L 01/16/19 6.04 0.603 32.2 1,710 8.60 373 854 1,720 2,070 21.4 0.04 24 14.0 34.5 51.2 7.17 2.07 1.71 225 4.10 05/07/19 6.17 0.375 33.3 1,640 7.15 367 840 3,260 3,930 21.7 0.05 31 14.5 36.4 28.9 4.61 1.20 < 1.00 175 5.73 07/08/19 5.82 0.271 30.8 1,700 5.19 433 991 2,310 2,780 19.6 0.07 38 14.6 27.8 19.9 4.60 0.92 < 1.00 375 6.13 10/29/19 6.18 0.193 35.1 1,850 3.61 536 1,230 2,340 2,820 21.7 0.03 4 15.8 50.8 21.3 7.33 0.74 < 1.00 450 5.54 Maximum 6.18 0.603 35.1 1,850 8.60 536 1,230 3,260 3,930 21.7 0.07 38 15.8 50.8 51.2 7.33 2.07 1.71 450 6.13 Minimum 5.82 0.193 30.8 1,640 3.61 367 840 1,720 2,070 19.6 0.03 4 14.0 27.8 19.9 4.60 0.74 < 1.00 175 4.10 Average 6.05 0.361 32.9 1,725 6.14 427 979 2,408 2,900 - 21.1 0.05 24 14.7 37.4 30.3 5.93 1.23 1.18 306 5.38 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site S5a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Gansberg Type: HRB From: 1981 Inches: 06-12 To: 2019 EC TKN NO3 P P,OS K K2O Cu Mo SO4 CEC Ca Na Mg Exch Cl Exch P Year pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 1981 5.80 1.08 31.2 997 1.4 233 534 19,729 23,675 21 10.9 19 12 1982 6.05 0.60 29.5 1,011 2.4 455 1,042 20,944 25,133 21 0.7 17 10 1983 6.14 0.18 29.5 982 0.9 462 1,058 18,362 22,034 22 0.6 9 10 24 33 42 1984 6.12 0.23 29.6 1,019 0.8 462 1,058 21,827 26,192 26 0.7 5 11 18 20 3 1.15 0.5 27 1985 6.27 0.35 28.1 1,031 0.9 501 1,147 22,575 27,090 21 0.6 5 11 24 39 4 2.05 1.7 42 5.8 1986 6.12 0.33 29.5 1,048 0.6 440 1,008 21,100 25,320 20 0.5 7 11 27 33 3 1.68 1.6 35 6.2 1987 6.22 0.63 29.6 1,037 0.5 470 1,076 24,727 29,672 21 0.6 9 13 30 58 4 2.56 2.5 74 6.5 1988 6.16 0.65 29.4 1,137 0.8 475 1,088 21,667 26,000 24 0.6 13 12 31 93 5 4.34 4.9 74 7.6 1989 6.02 0.79 28.9 1,128 1.1 398 912 21,727 26,073 19 0.4 11 11 47 90 7 3.32 3.5 92 7.6 1990 6.26 0.56 . 28.0 1,140 1.2 467 .1,068 21,500 25,800 14 0.4 8 10 27 77 4 3.71 4.0 74 6.7 1991 6.21 0.44 29.8 1,143 2.9 467 1,070 22,083 26,500 15 0.7 6 12 21 68 4 3.62 3.9 16 11.8 1992 6.32 0.41 29.1 1,220 3.6 556 1,273 20,917 25,100 16 0.7 5 14 19 57 4 3.17 3.4 17 9.6 1993 6.08 0.37 29.2 1,146 3.2 510 1,168 20,250 24,300 10 0.4 6 14 19 45 3 2.57 2.5 37 9.9 1994 6.08 0.42 28.8 917 4.9 570 1,305 .23,083 27,700 8 0.3 5 12 25 47 4 2.31 2.1 41 7.8 1995 6.18 0.35 28.2 951 5.2 585 1,341 20,644 24,778 16 1.5 4 13 16 42 4 2.58 2.5 32 7.7 1996 6.20 0.35 29.7 996 6.2 572 1,310 8 1.0 1 13 26 37 4 1.90 1.7 21 4.5 1997 6.18 0.28 32.9 1,006 5.2 513 1,175 11 1.0 1 13 20 28 4 1.48 1.1 16 6.7 1998 6.23 0.51 32.9 1,158 9.7 850 1,950 20 1.3 4 11 42 34 8 1.37 1.1 15.2 1999 6.20 0.37 30.6 1,047 6.6 813 1,860 28 1.8 2 12 40 28 6 1.10 < 1.0 16.3 2000 6.12 0.28 31.8 1,135 6.0 810 1,855 18,825 22,575 33 1.0 3 15 19 28 4 1.54 1.1 10.5 2001 6.00 0.47 32.2 1,015 8.5 708 1,620 20,675 24,825 36 1.5 2 15 31 48 6 2.14 1.8 35 9.7 2002 6.26 0.29 30.7 1,114 5.0 705 1,615 19,775 23,750 31 2.3 2 15 16 38 3 2.37 2.2 20 9.6 2003 6.34 0.28 32.2 1,200 4.0 740 1,693 19,663 23,625 30 2.0 3 14 17 35 3 2.10 1.8 27 7.2 2004 6.14 0.27 32.0 1,163 3.8 930 2,130 20,850 25,025 37 1.5 5 17 12 37 2 2.51 2.3 19 7.6 2005 6.27 0.23 33.3 1,093 2.5 895 2,050 18,675 22,400 35 2.0 4 16 12 32 2 2.28 2.0 13 6.3 2006 6.16 0.24 35.1 1,095 3.1 818 1,875 16,070 19,300 37 1.0 8 14 16 29 3 1.79 1.3 10 8.6 2007 5.98 0.30 33.7 1,200 1.7 557 1,273 7,886 9,450 24 0.1 15 18 34 3 1.88 1.6 27 6.6 2008 6.06 0.38 31.9 1,052 6.1 434 993 2,975 3,550 18 0.1 14 22 51 3 2.72 2.6 25 7.3 2009 6.04 0.38 32.6 1,228 6.2 588 1,345 2,816 3,375 12 0.2 9 16 19 55 4 3.09 3.1 31 7.7 2010 6.09 0.36 33.3 1,400 6.5 500 1,145 2,953 3,525 19 0.1 16 15 23 46 5 2.33 2.1 19 5.0 2011 6.03 0.27 35.6 1,340 6.2 595 1,363 3,733 4,475 21 0.1 32 15 18 34 4 1.91 1.5 10 7.5 2012 6.01 0.34 35.6 1,618 5.9 446 1,020 2,615 3,175 17 0.1 29 15 23 38 5 1.94 1.6 21 6.5 2013 5.80 0.42 36.3 1,488 5.6 598 1,370 3,479 4,150 17 0.1 26 15 33 39 6 1.68 1.3 25 8.3 2014 5.98 0.33 34.1 1,260 5.5 489 1,120 2,887 3,475 20 0.3 15 14 20 42 4 2.25 2.0 9 7.4 2015 5.70 0.56 35.3 1,720 6.4 449 1,028 3,231 3,875 20 0.1 16 16 39 59 8 2.38 2.1 68 5.2 2016 6.04 0.40 37.0 1,880 8.9 439 1,005 3,704 4,450 17 0.2 10 17 21 47 5 2.51 2.3 31 10.1 2017 5.87 0.41 35.7 1,840 10.1 556 1,273 2,278 2,725 15 0.1 21 18 34 34 6 1.45 1.1 16 8.8 2018 5.89 0.53 34.4 1,913 9.1 370 848 3,110 3,746 16 0.1 30 16 38 46 10 1.81 1.6 176 6.4 2019 6.05 0.36 32.9 1,720 6.14 427 979 2,410 2,900 21 0.05 24 15 37 30 6 1.23 1.2 306 5.4 Maximum 6.34 1.08 37.0 1,913 10.1 930 2,130 24,727 29,672 37 10.9 32 18 47 93 10 4.34 4.9 306 16.3 Minimum 5.70 0.18 28.0 917 0.5 233 534 2,278 2,725 8 0.0 1 10 12 20 2 1.10 0.5 9 4.5 Average 6.09 0.41 31.8 1,220 4.5 560 1,283 14,278 17,135 21 1.0 11 14 25 44 4 2.24 2.1 45 8.0 #Tests 39 39 39 39 39 39 39 35 35 39 39 37 39 37 37 -36 36 36 34 35 Site: S5a Ranch : Gansberg pH Salinity 10 - - 5 9 4 — - 8 E 3 - CL in E 2 6 4 WmW $mmm$ "'"a"o"& rn00000 '�6o o1�N��nm'ow 0 'O^�a°iommmmmm$rnmWo���RRi'vrv75KiRiRRoRRRRRPv�ao. , rn m m'.^,o nnRNR�'8R RRRR�Ri�RrvRnry ��� �rnm^,m',wmm�m�000m�oRrR N -t pH Linear(pH) t Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 50 15 40 10 -- - -- a 30 E 20 y 5 ---- 10 le 0 O m m m Nn rn NN rvN rvNrvNnPv i?i Rir ri2i i?i -m-a -m m -wa m m o 000 o ry ryoo NNry f•---•-�----N ry N N N N N N l�V N R N N N N �—CEC Linear(CEC) --4—SAR Linear(SAR) Site S6a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Neddenriep Type: DWB 2019 Inches: 06-12 EC TKN NO, P PZOS K K20 Cu Mo SO4 CEC Ca Na Mg Exch CI Exch P Date pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg.Kg menoo9 m /L mg/L mg/L SAR Na% m /L m /L 01/16/19 6.94 0.690 37.7 2,670 14.2 308 705 4,310 5,190 19.5 0.07 26 15.6 34.5 52.5 8.40 2.08 1.72 550 31.0 05/07/19 6.07 0.600 44.7 2,710 7.07 1,180 2,700 4,010 4,830 22.7 0.05 35 18.8 36.4 38.6 6.15 1.56 < 1.00 375 10.9 07/08/19 6.45 2.300 39.0 2,840 85.3 1,250 2,860 2,620 3,160 20.6 0.06 40 17.7 148 24.6 45.0 0.45 < 1.00 325 15.1 10/29/19 5.89 0.242 36.0 1,850 0.447 1,160 2,650 4,070 4,900 30.7 0.03 11 13.9 54.7 22.9 6.36 0.78 < 1.00 700 9.22 Maximum 6.94 2.300 44.7 2,840 85.3 1,250 2,860 4,310 5,190 30.7 0.07 40 18.8 148.0 52.5 45.00 2.08 1.72 700 31.0 Minimum 5.89 0.242 36.0 1,850 0.447 308 705 2,620 3,160 19.5 0.03 11 13.9 34.5 22.9 6.15 0.45 < 1.00 325 9.22 Average 6.34 0.958 39.350 2518 26.8 975 2,229 3,753 4,520 23.4 0.05 28 16.5 68.4 34.7 16.48 1.22 1.18 488 16.6 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site S6a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Neddenriep Type: DWB From: 1981 Inches: 06-12 To: 2019 EC TKN NO3 P P2O1 K K2O Cu Mo SOq CEC Ca Na Mg Exch CI Exch P Year pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 1981 4.96 1.55 29.3 1,509 0.9 500 1,145 18,357 22,028 28 0.5 17 15 1982 5.60 1.27 56.3 2,145 3.2 672 1,539 17,111 20,533 30 0.2 42 15 1983 6.07 0.69 45.1 1,786 0.9 702 1,608 17,395 20,874 28 0.2 32 15 30 101 123 1984 5.94 0.30 43.6 1,797 0.7 701 1,605 19,055 22,866 28 0.4 15 17 10 43 2 3.30 3.5 35 1985 6.04 0.33 44.0 2,019 0.8 754 1,727 21,633 25,960 28 0.2 10 17 12 51 3 3.66 4.0 43 27.4 1986 6.08 0.31 42.7 1,780 1.2 611 1,399 18,908 22,690 28 0.3 10 15 16 43 2 3.27 3.6 38 33.8 1987 6.13 0.59 41.6 1,815 0.5 732 1,676 20,000 24,000 32 0.3 15 15 26 84 5 4.16 4.6 112 37.7 1988 6.18 1.22 41.3 1,787 0.6 748 1,713 19,000 22,800 29 0.3 24 16 48 173 13 6.16 7.2 256 28.8 1989 6.12 0.83 39.5 1,672 0.6 614 1,405 20,727 24,873 29 0.2 17 14 28 123 6 5.61 6.5 155 23.3 1990 6.27 0.49 38.8 1,622 0.9 664 1,521 16,625 19,950 23 0.2 12 14 28 95 5 4.73 5.4 69 26.6 1991 5.97 0.69 37.9 1,534 1.6 680 1,557 19,833 23,800 22 0.2 12 17 23 111 5 5.46 6.3 132 56.4 1992 6.25 0.80 36.9 1,443 1.4 663 1,519 19,833 23,800 22 0.2 26 15 26 113 6 5.62 6.6 348 29.3 1993 6.54 0.60 36.4 1,369 2.3 603 1,382 19,833 23,800 17 0.2 10 18 19 100 5 5.49 6.4 90 37.2 1994 6.11 0.89 39.2 1,360 4.0 712 1,630 20,333 24,400 15 0.2 11 14 32 134 7 6.02 7.0 292 44.0 1995 6.01 0.78 36.4 1,322 9.2 684 1,567 20,126 24,111 24 0.5 11 14 36 99 12 4.65 5.2 91 27.8 1996 6.22 0.61 37.6 1,299 8.4 687 1,573 14 1.0 4 16 30 79 6 3.92 4.3 39 31.1 1997 6.03 0.30 42.5 1,157 2.6 556 1,273 21 1.0 7 14 12 40 2 3.26 3.5 27 36.9 1998 5.99 0.27 41.7 1,342 3.2 620 1,420 38 1.2 8 11 10 35 2 3.10 3.2 32.8 1999 6.38 0.31 42.7 1,490 3.1 740 1,697 34 1.5 4 16 15 39 3 2.57 2.4 39.4 2000 6.04 0.26 44.1 1,416 5.3 723 1,655 19,550 23,475 44 < 1.0 8 18 16 27 6 1.69 1.4 37.0 2001 6.38 0.42 42.1 1,358 3.4 690 1,582 17,125 20,550 42 2.3 4 17 17 60 4 3.46 3.6 65 36.3 2002 6.58 0.50 44.2 1,586 3.1 803 1,837 18,975 22,775 37 1.5 4 19 20 76 4 4.01 4.3 63 40.8 2003 6.47 0.36 45.0 1,553 1.9 858 1,965 19,055 22,850 35 1.0 9 18 17 47 3 3.07 3.1 42 35.0 2004 6.27 0.42 43.3 1,493 5.2 858 1,965 18,650 22,375 43 1.3 7 17 15 59 3 3.67 3.9 55 25.4 2005 6.29 0.43 41.3 1,525 3.8 908 2,080 18,950 22,725 42 1.0 9 17 26 44 4 2.35 2.1 56 21.2 2006 5.96 0.46 43.9 1,380 4.2 857 1,963 15,443 18,525 44 0.9 13 18 15 78 3 5.21 5.9 56 38.4 2007 6.48 0.46 44.8 1,760 2.3 693 1,585 8,630 10,350 35 0.1 19 19 81 3 4.66 5.2 57 17.3 2008 6.46 0.47 41.2 1,347 3.7 698 1,598 3,592 4,300 24 0.1 18 18 83 3 4.92 5.5 46 26.2 2009 6.39 0.54 44.6 1,885 8.2 703 1,610 3,223 3,875 14 0.1 11 19 15 90 3 5.59 6.4 56 23.2 2010 6.24 0.64 44.8 2,113 12.8 729 1,668 3,466 4,150 25 0.1 28 20 26 88 5 4.44 4.9 64 26.2 2011 6.12 0.50 43.0 1,660 13.3 554 1,268 4,913 5,875 29 0.1 44 18 28 57 6 2.85 2.9 24 25.0 2012 6.38 0.92 44.2 1,983 12.0 690 1,580 3,092 3,725 24 0.2 45 19 48 107 11 4.21 4.6 157 19.8 2013 6.26 0.56 46.0 1,838 8.9 584 1,338 3,888 4,675 23 0.3 23 18 27 77 4 3.68 3.9 60 19.3 2014 6.44 0.55 44.5 1,998 7.7 615 1,408 4,473 5,375 25 0.3 17 17 29 74 6 3.54 3.7 33 22.2 2015 6.18 0.64 41.2 2,067 11.2 420 965 4,229 5,075 30 0.1 21 17 25 97 15 4.37 4.8 42 12.8 2016 6.84 0.97 45.5 2,893 23.6 349 798 4,747 5,700 26 0.1 17 19 75 93 12 3.33 3.5 95 19.6 2017 6.90 0.62 42.7 2,158 15.7 469 1,075 2,524 3,025 16 0.1 19 20 59 41 8 1.44 1.5 39 16.4 2018 6.75 1.13 38.1 2,603 32.8 335 766 3,099 3,733 18 0.1 33 19 83 61 34 1.66 1.4 225 22.7 2019 6.34 0.96 39.4 2,520 26.8 975 2,230 3,750 4,520 23 0.05 28 17 68 35 16 1 1.2 488 16.6 Maximum 6.90 1.55 56.3 2,893 32.8 975 2,230 21,633 25,960 44 2.3 44.5 20 83 173 34 6.16 7.2 488 56.4 Minimum 4.96 0.26 29.3 1,157 0.5 335 766 2,524 3,025 14 0.1 4 11 10 27 2 1.22 1.2 24 12.8 Average 6.22 0.63 42.0 1,728 6.5 671 1,536 13,433 16,118 28 0.5 17 17 28 77 7 3.90 4.3 105 29.0 #Tests 39 39 39 39 39 39- 39 35 35 39 39 37 39 37 37 36 36 36 34 35 Site : S6a Ranch : Neddenriep pH Salinity 10 ---- --- - 5 9 - 4 8 -- E 3 - a U) E 2 6 5 1 4 0 $$gg^^off $^mm$TNmoo$^W$o" ^o'oo$^Ooo������'8�00 $^m° S" ^; "$m$$80000RRPvSilZRRRRRRRRR r°r'iAr''''''m�mmNRRrRRrRrRRRRRRRr7ZRR mmarnmrnm�rnwmo,amawmmw.�vRrRR t pH Linear(pH) —+—Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 50 15 40 - r 0 30 10 20 _ rn E 5 10 OO N 17 O N M^o W O N wl O h 0 n O_W pp 0 9 m O m m m.FWD m W A a...$^W$. $O�i$WW�W OWi W W W W W W W W W OWiNN rvtOV NtOV NtOV lOV lOV lOV tOV NNN[OV NR$R --------------T--T�NN NNNNNIOV NNIOV NN NNNNNtOV N I I t CEC Linear(CEC) t SAR Linear(SAR) Site . S7a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Bruns Type: JaC 2019 Inches: 06-12 EC TKN NO, P P2O5 K K2O Cu Mo SO4 CEC Ca Na Mg Exch Cl Exch P Date pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg.Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 01/16/19 5.75 0.416 41.5 2,450 10.9 557 1,270 3,500 4,220 30.7 0.05 28 13.7 43.1 14.40 7.48 0.53 < 1.00 150 12.7 05/07/19 5.78 0.272 39.3 2,230 5.77 489 1,120 5,420 6,530 21.7 0.05 29 13.6 27.3 6.88 4.41 0.32 < 1.00 400 8.71 07/08/19 5.75 0.298 32.7 2,040 7.03 561 1,280 4,030 4,860 19.6 0.05 35 13.1 46.3 7.38 6.70 0.27 < 1.00 375 8.90 10/29/19 5.93 0.110 38.1 2,200 1.03 436 1,000 4,020 4,840 31.5 0.02 4 15.2 31.2 7.74 7.54 0.32 < 1.00 675 6.90 Maximum 5.93 0.416 41.5 2,450 10.9 561 1,280 5,420 6,530 31.5 0.05 35 15.2 46.3 14.40 7.54 0.53 < 1.00 675 12.7 Minimum 5.75 0.110 32.7 2,040 1.0 436 1,000 3,500 4,220 19.6 0.02 4 13.1 27.3 6.88 4.41 0.27 < 1.00 150 6.90 Average 5.80 0.274 37.9 2230 6.2 511 1,168 4,243 5,113 25.9 0.04 24 13.9 37.0 9.10 6.53 0.36 < 1.00 400 9.30 #Tests 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Site S7a SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY SOIL QUALITY DATA Ranch: Bruns Type: JaC From: 1981 Inches: 06-12 To: 2019 EC TKN NO3 P P201 K K20 Cu Mo SO, CEC Ca Na Mg Exch Cl Exch P Year pH mS/cm Sat% mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg me/100g mg/L mg/L mg/L SAR Na% mg/L mg/L 1981 5.58 0.67 37.5 1,384 0.9 301 689 20,371 24,445 305 0.8 17 13 1982 5.77 0.26 39.4 1,728 4.5 520 1,191 18,522 22,226 33 0.5 14 13 1983 5.98 0.15 41.2 1,864 0.8 611 1,399 19,125 22,950 31 0.6 17 16 17 12 22 1984 5.87 0.17 40.8 1,858 0.9 574 1,314 21,964 26,357 31 0.7 8 15 14 19 3 1.29 1.0 12 1985 5.83 0.20 41.7 2,085 0.7 678 1,553 21,717 26,060 29 0.4 5 14 15 14 3 0.83 0.1 15.0 7.7 1986 5.84 0.18 40.4 1,946 0.5 606 1,388 20,067 24,080 32 0.4 6 14 15 11 3 0.70 < 1.0 15.0 7.2 1987 5.93 0.18 40.1 1,907 0.3 645 1,477 21,909 26,291 31 0.5 5 14 17 12 4 0.68 < 1.0 17.0 8.7 1988 6.05 0.24 40.9 2,098 0.5 630 1,443 20,000 24,000 33 0.5 9 15 27 15 6 0.66 < 1.0 15.0 10.1 1989 6.10 0.20 39.7 2,003 0.6 549 1,257 21,636 25,964 31 0.2 7 14 24 9 6 0.45 1.0 20.0 8.0 1990 6.30 0.19 39.1 3,063 0.7 564 1,291 18,625 22,350 23 0.4 7 14 21 10 5 0.49 1.0 20.0 5.8 1991 6.30 0.22 39.0 1,765 1.6 649 1,487 21,083 25,300 24 0.6 6 14 26 10 6 0.47 < 1.0 10.0 9.7 1992 6.27 0.30 37.9 1,882 3.1 668 1,530 20,667 24,800 23 0.6 5 17 32 11 8 0.44 < 1.0 22.0 9.5 1993 6.13 0.20 35.4 1,583 1.8 598 1,368 22,417 26,900 17 0.3 5 17 18 7 4 0.40 < 1.0 8.0 12.9 1994 6.14 0.18 37.4 1,607 1.4 683 1,563 23,083 27,700 14 0.3 7 15 20 9 5 0.46 < 1.0 7.0 7.3 1995 6.11 0.23 35.7 1,464 3.4 698 1,576 19,756 23,667 22 0.8 4 15 21 9 5 0.47 1.0 7.0 4.8 1996 6.15 0.26 36.1 1,445 2.7 644 1,475 15 1.0 1 15 24 17 6 0.64 1.1 7.0 4.1 1997 6.15 0.16 39.8 1,472 2.9 639 1,464 18 1.0 1 13 15 8 4 0.52 1.0 5.0 3.5 1998 6.21 0.13 39.9 1,511 32.4 900 2,060 32 1.2 33 11 12 9 3 0.60 < 1.0 5.1 1999 6.12 0.15 43.6 1,898 12.1 885 2,027 65 1.8 2 17 16 10 3 0.63 < 1.0 8.6 2000 6.29 0.15 39.3 1,683 2.8 850 1,945 20,225 24,300 45 < 1.0 51 16 12 13 3 0.92 < 1.0 5.8 2001 6.06 0.28 42.8 1,788 5.2 815 1,867 20,150 24,200 47 2.3 2 18 29 11 6 0.51 < 1.0 9.0 11.1 2002 6.14 0.37 38.9 1,705 9.9 790 1,810 20,325 24,400 40 1.3 2 17 35 14 8 0.64 < 1.0 8.0 10.7 2003 6.46 0.21 40.0 1,578 3.2 845 1,938 20,950 25,150 41 1.5 3 16 22 6 5 0.32 1.0 4.6 9.0 2004 6.33 0.20 41.1 1,725 2.9 978 2,240 21,150 25,375 48 1.3 4 18 19 7 4 0.36 < 1.0 6.3 10.9 2005 6.25 0.16 43.4 1,800 2.8 1,023 2,343 19,900 23,875 46 1.3 3 18 17 6 3 0.36 < 1.0 3.4 8.4 2006 6.10 0.15 42.7 1,598 2.6 910 2,085 17,084 20,500 49 0.8 2 14 14 6 3 0.37 < 1.0 3.3 8.5 2007 5.96 0.19 44.1 2,058 1.2 699 1,600 8,629 10,350 34 0.2 17 22 9 4 0.47 < 1.0 7.9 6.0 2008 6.03 0.22 41.8 1,715 4.7 622 1,425 4,547 5,425 25 0.1 17 28 9 5 0.43 < 1.0 6.3 6.1 2009 5.78 0.21 42.7 1,938 4.1 674 1,545 5,502 6,625 15 0.2 7 17 18 11 4 0.62 < 1.0 7.9 5.6 2010 6.09 0.24 41.9 2,285 3.6 632 1,448 5,120 6,150 29 0.1 9 17 27 8 6 0.36 < 1.0 6.2 5.4 2011 5.82 0.25 39.8 1,705 7.5 548 1,255 6,217 7,450 31 0.1 38 16 23 8 5 0.39 < 1.0 5.2 4.5 2012 5.87 0.25 40.4 1,727 7.6 505 1,155 4,920 5,900 25 0.1 43 15 24 9 5 0.46 < 1.0 7.1 7.6 2013 5.76 0.27 41.7 1,833 4.6 465 1,063 6,225 7,450 25 0.3 19 14 30 9 5 0.43 < 1.0 13.5 6.3 2014 5.75 0.26 43.7 2,183 6.7 574 1,315 4,683 5,600 26 0.2 14 16 27 8 5 0.38 < 1.0 4.8 7.2 2015 5.55 0.45 41.7 2,758 13.3 556 1,273 4,305 5,150 29 0.2 20 17 42 12 24 0.37 < 1.0 3.8 10.4 2016 5.76 0.26 42.1 2,613 6.8 473 1,083 6,355 7,625 24 0.2 13 16 25 7 6 0.39 < 1.0 5.0 13.9 2017 5.81 0.38 40.9 2,428 12.3 363 833 3,641 4,375 20 0.1 23 17 37 8 8 0.32 < 1.0 6.1 11.3 2018 5.79 0.31 35.6 2,183 5.5 475 1,087 4,095 4,933 22 0.1 27 16 36 19 8 0.68 1.0 128 8.8 2019 5.80 0.27 37.9 2,230 6.18 511 1,170 4,240 5,110 26 0.04 24 14 37 9 7 0.36 < 1.0 400 9.3 Maximum 6.46 0.67 44.1 3,063 .32.4 1,023 2,343 23,083 27,700 305 2.3 51 18 42 19 24 1.29 1.1 400.0 13.9 Minimum 5.55 0.13 35.4 1,384 0.3 301 689 3,641 4,375 14 0.0 1 11 12 6 3 0.32 0.1 3.3 3.5 Average 6.01 0.24 40.2 1,900 4.7 650 1,488 14,834 17,801 37 0.6 13 15 23 10 6 0.52 1.0 24.7 8.0 #Tests 39 39 39 39 39 39 39 35 35 39 39 37 39 37 37 36 36 36 34 35 Site: S7a Ranch : Bruns pH Salinity 10 5 --- - - - - -_ - - 9 4 8 E 3 CL to E 2 6 5 1 WWI 4 O g ^^'�mSomm�oo��a8^Pa�BoRgrRRRRRRRRRRR 'om$m�mmm�aaaS &^WAR E R9R RRRRRRRRRR P W N N Oe t pH Linear(pH) --*---Salinity Linear(Salinity) Cation Exchange Capacity Sodium Adsorption Ratio 50 15 40 10 30 o r N E 20 5 - - 10 0 f o o OO P PP o P o o O N ry a n O n O P O N ry O -- � PW o PW 0p e 0^i W o 0 0 0 0 0 0 oo 0 0 0 o Oo o OOi o OOi P P W P P P P P N O O O O O G O O O O O R R R R f V R R R pO W W W W W W P P P W W W 0 0 0 0 0 0 0 0 O O O O --*--CEC Linear(CEC) SAR Linear(SAR) ALPINE COUNTY MONITORING WELLS Site: ACMW-01AW SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 1/15/2019 6.89 5486.24 10.3 6.32 38.6 0.017 < 0.05 < 0.020 < 0.020 2.52 2.52 98 4/11/2019 6.18 5486.95 9.0 6.19 37.8 0.021 < 0.07 < 0.020 < 0.010 1.65 1.69 85 8/13/2019 6.95 5486.18 11.9 6.57 27.0 0.024 < 0.10 < 0.020 < 0.010 0.102 0.152 101 10/8/2019 11.05 5482.08 13.9 6.19 35.4 0.025 < 0.10 < 0.020 < 0.010 0.262 0.288 91 Maximum 11.05 5487.0 13.9 6.57 38.6 0.025 < 0.100 < 0.020 < 0.020 2.52 2.52 101 Minimum 6.18 5482.1 9.0 6.19 27.0 0.017 < 0.050 < 0.020 < 0.010 0.102 0.152 85 Average 7.77 5485.4 11.3 6.32 34.7 0.022 < 0.080 < 0.020 < 0.013 1.134 1.163 94 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-01AW SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Fecal EC Chloride COD SO4 Color Coli E.coli Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 1/15/2019 134 7.95 2.50 1.0 < 1 4/11/2019 118 6.06 2.50 1.0 < 1 8/13/2019 57 1.11 1.48 < 1 < 1 10/8/2019 181 3.74 2.79 < 1 < 1 Maximum 181 7.95 2.79 1.0 < 1 Minimum 57 1.11 1.48 < 1 < 1 Average 123 4.72 2.32 1.0 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-01AW SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO,-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 89 9.0 5480.7 10.4 6.86 41.0 26 46.02 0.142 0.107 0.027 < 0.010 0.306 0.387 90 7.7 5481.1 11.1 6.91 61.0 54 36.80 0.090 0.084 0.021 < 0.010 0.278 0.373 91 7.1 5481.6 11.1 7.26 41.0 38 32.73 0.087 0.106 0.040 0.012 0.233 0.350 92 7.8 5480.9 11.4 6.79 58.0 52 1.52 0.035 0.106 0.026 0.010 0.211 0.327 93 7.2 5481.5 11.3 6.85 52.0 51 16.25 0.036 0.116 0.027 0.011 0.588 0.715 94 7.9 5481.9 10.2 6.82 46.0 39 3.77 0.028 0.088 0.029 0.010 0.229 0.326 95 6.5 5482.2 11.6 6.55 64.0 63 1.60 0.023 0.103 0.031 0.011 1.054 1.168 96 6.3 5482.4 12.2 6.50 64.0 58 16.87 0.074 0.097 0.022 0.010 0.542 0.648 97 7.4 5481.3 11.9 6.49 55.0 49 2.93 0.033 0.104 0.037 0.011 1.013 1.129 98 6.3 5482.4 11.3 6.27 44.0 48 1.07 0.028 0.132 0.021 0.012 0.312 0.457 99 6.3 5482.4 11.2 6.26 44.0 44 2.23 0.026 0.108 < 0.020 < 0.010 0.204 0.322 00 6.2 5482.5 10.8 6.71 43.0 52 1.26 0.041 0.160 0.020 < 0.010 0.604 0.701 01 6.8 5481.9 10.7 6.82 35.0 45 9.89 0.062 0.142 0.036 < 0.020 0.380 0.578 02 6.3 5482.4 10.5 6.50 34.0 54 14.63 0.038 0.126 < 0.017 0.611 1.011 03 6.9 5481.8 11.2 6.93 39.1 1.85 0.024 0.112 < 0.015 0.870 1.263 04 6.0 5482.7 10.1 6.77 42.7 63 3.40 0.025 0.110 0.020 < 0.015 1.215 1.633 05 6.1 5482.6 9.7 6.75 41.8 48 10.25 0.033 0.129 < 0.009 0.516 0.629 06 5.0 5483.7 10.8 6.74 38.2 33 15.77 0.045 0.440 < 0.010 0.132 0.309 07 6.1 5482.6 11.0 6.48 41.8 37 11.45 0.032 0.055 < 0.011 0.362 0.400 08 5.6 5483.1 10.5 6.64 42.4 35 26.04 0.050 0.081 < 0.013 1.282 1.329 09 5.7 5483.0 9.4 6.63 36.7 37 23.53 0.068 0.081 < 0.010 0.683 0.813 10 5.3 5483.4 9.3 6.33 44.0 63 10.75 0.030 0.065 < 0.020 1.989 2.041 11 5.3 5483.4 10.1 6.79 40.5 33 19.65 0.041 < 0.055 < 0.012 0.491 0.484 12 6.7 5486.5 10.6 6.75 31.7 0.049 0.072 0.022 < 0.010 0.177 0.275 13 6.3 5486.9 10.7 6.75 46.0 0.042 0.102 0.028 < 0.010 0.108 0.176 14 7.5 5485.6 10.7 6.73 38.1 0.153 0.082 0.021 < 0.011 0.143 0.165 15 11.2 5482.0 11.0 6.67 33.8 0.022 0.054 0.020 < 0.010 0.121 0.152 16 6.3 5486.8 11.4 6.57 35.4 0.032 < 0.055 < 0.020 < 0.010 0.542 0.488 17 5.8 5487.3 11.4 6.55 38.5 0.022 < 0.083 0.028 < 0.010 0.389 0.391 18 7.56 5485.6 12.1 6.57 37.8 0.030 0.080 0.023 < 0.010 0.482 0.496 19 7.77 5485.4 11.3 6.32 34.7 0.022 < 0.080 < 0.020 < 0.013 1.134 1.163 Maximum 11.2 5487.3 12.2 7.26 64.0 63 46.02 0.153 0.440 0.040 < 0.020 1.989 2.041 Minimum 5.0 5480.7 9.3 6.26 31.7 26 1.07 0.022 0.054 0.020 < 0.009 0.108 0.152 Average 6.8 5483.1 10.9 6.66 43.4 46 13.49 0.047 0.107 0.025 0.012 0.555 0.668 #Tests 31 31 31 31 31 22 23 31 31 22 31 31 31 Site: ACMW-01AW SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 89 78 97 1.6 5 6.35 3 < 2 90 94 123 1.5 6 5.43 < 5 2 < 2 91 84 88 1.5 < 5 6.95 < 5 3 < 2 92 87 122 2.0 < 5 3.33 < 5 2 < 2 93 92 120 2.8 5 5.52 < 5 2 2 < 2 94 77 106 3.0 < 5 4.42 10 2 < 2 95 106 162 7.6 5 3.02 5 7 2 96 109 147 5.0 2 4.39 5 12.3 1 97 97 132 4.3 2 3.28 5 2.3 1 98 77 101 2.6 < 5 1.84 < 5 3.4 < 1.1 99 77 104 1.7 < 5 3.03 5 2.3 1.1 00 79 101 3.3 < 5 1.86 < 5 1.2 < 1.1 01 76 83 2.9 8 2.28 30 1.7 < 1.1 02 78 89 4.3 < 5 2.58 < 5 1.3 < 1.1 03 84 104 4.6 5 2.62 5 1.1 1.1 04 89 119 7.1 6 2.77 10 1.3 < 1.1 05 82 108 4.6 < 5 3.64 18 1.2 < 1.1 06 84 92 1.8 < 5 3.83 1.3 < 1.1 07 79 95 1.7 7 2.33 < 1.1 < 1.1 08 91 107 3.7 < 5 2.80 60 < 1.3 < 1.1 09 86 94 3.1 6 2.74 1.5 < 1.1 10 96 132 7.3 < 5 2.61 1.1 < 1.1 11 90 99 2.5 5 4.01 1.2 < 1.1 12 81 70 .1.1 2.31 1.7 < 1.1 13 83 96 1.3 3.24 1.4 < 1.1 14 75 83 1.4 3.78 1.9 < 1.1 15 70 79 1.4 4.73 2.4 < 1.0 16 95 118 1.6 5.30 9.6 < 1.0 17 78 90 2.0 3.61 1.0 < 1.0 18 79 81.7 2.50 3.48 1.5 < 1.0 19 94 123 4.72 2.32 1.0 < 1.0 Maximum 109 162 7.6 8 6.95 60 12.3 2.0 < 2 Minimum 70 70 1.1 2 1.84 < 5 1.0 < 1.0 < 2 Average 85 105 3.1 5 3.56 11 2.5 1.3 < 2 #Tests 31 31 31 23 31 17 31 31 1 Site ACMW-01 AW Nitrate-Nitrogen and Water Level Chlorides 5 -- ---- 5495 50 - 4 5490 40 — 3 5485 d J 4)) 30 O) J J E d '& 2 5480 E cc 3 20 1 _ -- -- - 5475 10 Q 5470 0 89 90 91 92 93 84 95 96 97 98 99 00 01 OT 03 04 OS 06 07 OB 09 10 11 12 13 14 15 18 17 18 19 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 OS O6 07 08 09 10 11 12 13 14 15 16 17 18 18 tNitrate +Water Level +Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 0.50 400 - 0.40 300 - 0.30 -- - J J E E 200 0.20 100 0.10 - 0 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 0.00 4 89 90 91 92 93 94 95 96 97 9e 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 TDS Linear(TDS) +Total P Linear(Total P) Annual Metal Report ACMW-01AW Main Dam Ca K Mg Na Ag AI As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 10/31/1988 12 1.1 3.6 6.8 <10 2400 <4 40 <0.1 <10 <20 820 <0.2 90 <5 <50 <1 <1 <10 11/28/1989 9.4 1 4.1 6.1 <10 1300 <10 110 <1 <10 <50 1700 <1 120 <10 <5 <50 8/1/1990 12 1.5 3.7 7.1 <10 1100 <4 84 <0.1 <10 <20 860 <0.2 100 1 <1 <10 8/21/1991 9 1 3.1 5.2 <10 600 <4 61 <0.1 <10 <20 550 <0.2 64 2 <1 <10 7/21/1992 14 1 4 7.2 <10 76 <4 55 <0.1 <10 <20 72 <0.2 <10 <1 <1 <10 7/12/1994 11 0.9 3.2 5.4 <10 660 <2 45 0.1 <10 <20 410 <0.2 7.1 <1 <1 7.2 8/15/1995 15 1.1 4.4 6.8 <10 310 <1 65 <0.1 <10 <10 160 <0.2 <5 <1 <1 <5 6/19/1996 18 1.2 5.3 6.9 <10 120 <1 76 <0.1 <10 <10 <30 <0.2 <5 <1 <1 <5 6/16/1997 14 1.4 4.3 7.2 <10 250 <2 56 <0.5 <10 <25 200 <0.5 <10 <5 <5 <50 7/21/1998 12.3 0.918 3.36 5.15 <10 <25 <2 <100 <0.5 <10 <20 83.4 <0.5 <20 <2.5 <5 <25 6/20/1999 5.71 0.548 1.76 2.99 <10 530 <2 <100 <1 0.28 <10 <20 115 <0.2 <20 <5 <2.5 <3 <1 <1 <10 7/18/2000 7.4 0.928 2.84 5.38 <10 <2 <100 <20 367 <20 <2.5 <10 6/19/2001 6.65 0.760 2.01 4.25 <10 <2 <100 <20 548 <20 <2.5 <10 6/18/2002 6.61 0.878 2.13 4.32 <10 400 <2 35 <0.2 <0.2 <1 <20 372 0.02 <20 <1 <2.5 <1 <2 <0.2 <10 6/17/2003 7.18 0.938 2.42 4.84 <10 300 <2 35.7 <0.2 <0.2 <1 <20 242 <0.01 <20 <1 <2.5 <1 <2 <0.2 <10 5/18/2004 7.78 0.866 2.46 4.83 <10 440 <2 <100 <0.2 <0.2 <1 <20 339 0.01 <20 <1 <2.5 <1 <2 <0.2 <10 6/14/2005 8.73 0.793 2.72 4.64 <10 <2 <100 <20 507 <20 <2.5 <10 6/1/2006 7.84 1.11 2.76 4.91 <10 1200 3.42 <2 <2 <2 <20 1890 <0.2 23.8 <2 2 <2.5 <2 <10 <1 2 169 6/19/2007 8.90 0.894 2.53 5.11 <10 420 <2 37 <1 <0.5 <1 <20 25.3 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/4/2008 9.84 1.24 3.3 6.13 <10 4300 2.92 68 <1 <0.5 <1 <20 141 <0.2 26.8 <2 <5 <2.5 <1 <5 <1 <3 <10 6/17/2009 8.15 0.932 2.46 5.68 <10 830 <2 41 <1 <0.5 <1 <20 416 <0.2 33.9 <2 <5 <2.5 <1 <5 <1 <3 11.3 6/9/2010 14.0 1.10 4.2 6.80 <0.5 88 <1 63 <1 <0.5 <1 <2 56 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2011 8.41 1.01 2.86 5.58 <0.5 2430 <1 47.9 <1 <0.5 <1 <2 1100 <0.2 8.11 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2012 854 6.02 87.5 <1 <0.5 8.42 <0.2 5.47 13.4 <2 <5 <1 13.3 6/18/2013 9.77 1.05 2.7 5.53 6/17/2014 7.79 <1 2.48 5.05 <0.5 151 1.46 36.5 <1 <0.5 <1 <2 405 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2015 8.13 <1 2.51 4.56 <0.5 218 <1 40.1 <1 <0.5 <1 <10 179 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/12/2016 7.63 1.03 2.47 4.26 <0.5 1960 <1 46.9 <1 <0.5 1.03 <2 1610 <0.2 16.7 <2 <5 <0.5 <1 <5 <1 <3 <20 7/19/2017 8.78 1.03 2.6 4.58 <0.5 676 <1 44.4 <1 <0.5 <1 <2 647 <0.2 3.29 <2 <5 <0.5 <1 <5 <1 <3 <20 8/6/2018 8.27 <l- 2.35 4.68 <0.5 399 <1 41.6 <1 <0.5 <1 <2 235 . <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/13/2019 5.87 <1.0 1.72 3.97 <0.5 1580 <1 32.2 <1 <0.5 <1 <2 909 <0.2 3.88 <2 <5 <0.5 x1 <5 <1 <3 <20 J Site: ACMW-01BE SOUTH TAHOE PUBLIC UTILITY DISTRICT ,LPINE COUNTY GROUNDWATER QUALITY DAT 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 1/15/2019 10.53 5493.02 8.0 6.01 48.0 0.025 0.077 < 0.020 < 0.020 0.114 0.191 85 4/11/2019 3.13 5500.42 5.9 6.20 39.9 0.027 < 0.070 < 0.020 < 0.010 0.166 0.214 72 8/13/2019 7.47 5496.08 8.2 6.51 37.2 0.025 < 0.100 < 0.020 < 0.010 0.100 0.145 71 10/8/2019 7.50 5496.05 9.3 6.29 40.4 0.038 < 0.100 < 0.020 < 0.010 0.139 0.197 68 Maximum 10.53 5500.4 9.3 6.51 48.0 0.038 0.077 < 0.020 < 0.020 0.166 0.214 85 Minimum 3.13 5493.0 5.9 6.01 37.2 0.025 < 0.070 < 0.020 < 0.010 0.100 0.145 68 Average 7.16 5496.4 7.9 6.25 41.4 0.029 < 0.087 < 0.020 < 0.013 0.130 0.187 74 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-01BE SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Fecal EC Chloride COD _ SO4 Color Coli E.coli Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 1/15/2019 104 1.27 2.55 < 1 < 1 4/11/2019 94.4 2.73 4.91 < 1 < 1 8/13/2019 76 1.11 1.04 < 1 < 1 10/8/2019 87 1.28 1.46 < 1 < 1 Maximum 104 2.73 4.91 < 1 < 1 Minimum 76 1.11 1.04 < 1 < 1 Average 90 1.60 2.49 < 1 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-01BE SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 89 10.5 5491.8 9.8 7.05 72.0 50 8.22 0.040 0.109 0.035 < 0.012 0.371 0.456 90 10.1 5491.0 9.1 7.02 51.0 40 4.37 0.025 0.085 0.025 < 0.010 0.157 0.252 91 18.2 5482.9 9.7 7.23 57.0 46 18.50 0.063 0.093 0.038 0.011 0.185 0.288 82 12.9 5488.2 10.4 6.91 50.0 39 24.00 0.053 0.113 0.028 0.010 0.163 0.287 83 10.8 5490.3 10.2 6.87 63.0 67 7.75 0.031 0.069 0.021 0.010 0.728 0.807 94 11.1 5490.0 10.4 6.62 60.0 56 2.07 0.030 0.083 0.025 0.010 0.318 0.410 95 8.1 5493.0 9.8 6.67 69.0 66 0.73 0.025 0.197 0.047 0.011 0.405 0.613 96 7.9 5493.2 11.2 6.44 67.0 66 1.74 0.018 0.099 0.020 0.011 0.438 0.548 97 11.1 5490.1 11.0 6.35 68.0 68 1.50 0.019 0.088 0.021 0.018 0.821 0.928 98 8.4 5492.7 10.1 6.24 52.0 47 3.10 0.022 0.116 < 0.020 < 0.010 0.541 0.668 99 9.0 5492.1 10.1 6.29 56.0 55 0.76 0.021 0.111 < 0.020 < 0.010 0.449 0.570 00 9.7 5491.4 10.6 6.81 47.0 39 5.80 0.029 0.100 0.022 < 0.010 0.169 0.233 01 11.6 5489.5 10.2 6.80 43.0 31 3.91 0.031 0.109 0.020 < 0.010 0.200 0.319 02 9.9 5491.2 8.6 6.52 37.0 30 10.11 0.029 0.126 < 0.010 0.142 0.284 03 11.5 5489.6 9.8 6.84 39.6 7.77 0.026 0.099 0.012 0.587 0.687 04 10.0 5491.1 9.8 6.57 43.6 25 4.25 0.039 0.119 < 0.020 < 0.010 0.128 0.263 05 9.5 5491.6 11.1 6.47 42.4 35 4.35 0.027 0.089 < 0.010 0.204 0.222 06 5.8 5495.3 11.3 6.41 44.9 38 12.40 0.027 0.203 < 0.010 0.425 0.580 07 10.5 5490.6 11.1 6.31 38.7 30 13.80 0.037 0.055 < 0.010 0.125 0.163 08 11.6 5489.5 9.4 6.53 33.2 33 9.35 0.039 0.073 < 0.010 0.193 0.233 09 12.3 5488.8 9.3 6.50 40.2 34 6.07 0.144 0.084 < 0.010 0.198 0.250 10 10.5 5490.6 9.7 6.47 46.7 38 7.95 0.031 < 0.050 < 0.010 0.242 0.279 11 8.0 5493.1 10.3 6.17 56.7 59 7.10 0.039 < 0.060 < 0.010 0.886 0.849 12 12.7 5490.9 8.5 6.27 53.9 0.027 < 0.046 0.023 < 0.010 0.279 0.373 13 10.8 5492.7 7.3 6.29 47.6 0.067 < 0.080 0.025 < 0.009 0.177 0.228 14 12.4 5491.2 8.2 6.50 50.0 0.043 0.052 0.021 < 0.011 0.151 0.139 15 13.9 5489.7 10.5 6.81 61.1 0.026 < 0.050 0.020 < 0.010 0.143 0.159 16 8.8 5494.8 8.5 6.34 76.2 0.076 < 0.055 < 0.020 < 0.010 0.213 0.181 17 6.0 5497.5 9.6 6.43 50.2 0.025 < 0.083 0.023 < 0.010 0.421 0.411 18 11.2 5492.3 8.8 6.57 47.0 0.035 < 0.080 0.022 < 0.010 0.168 0.192 19 7.2 5496.4 7.9 6.25 41.4 0.029 < 0.087 < 0.020 < 0.013 0.130 0.187 Maximum 18.2 5497.5 11.3 7.23 76.2 68 24.00 0.144 0.203 0.047 0.018 0.886 0.928 Minimum 5.8 5482.9 7.3 6.17 33.2 25 0.73 0.018 0.046 < 0.020 < 0.009 0.125 0.139 Average 10.4 5491.4 9.7 6.57 51.8 45 7.20 0.038 0.092 0.024 0.011 0.315 0.389 #Tests 31 31 31 31 31 22 23 31 31 22 31 31 31 Site: ACMW-01BE SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 89 101 168 3.1 5 4.63 < 2 < 2 90 75 112 1.5 6 3.64 < 5 < 2 < 2 91 88 118 1.7 < 5 6.01 < 5 3 < 2 82 80 105 1.4 6 5.17 < 5 2 < 2 83 103 140 1.7 13 4.49 < 5 < 2 2 < 2 94 85 129 1.7 < 5 3.54 < 4 < 2 < 2 95 94 144 1.9 5 2.90 5 2 2 96 99 140 1.8 2 2.19 5 1 1 97 102 145 2.1 4 2.89 5 1 1 98 80 111 1.1 < 5 2.05 < 5 < 1.0 < 1.1 99 86 121 1.3 < 5 2.63 < 5 < 1.2 < 1.1 00 77 97 0.9 < 5 1.49 < 5 < 1.1 < 1.1 01 69 85 1.4 8 1.27 13 < 1.1 < 1.1 02 66 81 2.5 < 5 1.29 10 < 1.1 < 1.1 03 77 90 1.9 5 1.62 8 1.1 1.1 04 79 91 1.7 < 5 1.76 8 < 1.1 < 1.1 05 75 92 1.5 < 5 1.56 5 < 1.1 < 1.1 06 83 97 1.3 < 5 1.33 < 1.1 < 1.1 07 74 83 1.2 5 1.39 < 1.1 < 1.1 08 71 74 1.8 < 5 1.61 20 < 1.4 < 1.1 09 83 89 1.5 5 1.13 < 1.1 < 1.1 10 79 103 1.3 < 5 1.22 < 1.1 < 1.1 11 95 125 1.9 < 7 1.33 < 1.1 < 1.1 12 97 112 1.4 1.95 < 1.1 < 1.1 13 86 100 1.4 1.98 < 1.1 < 1.1 14 89 101 1.4 2.31 < 1.1 < 1.1 15 98 128 1.4 3.03 < 1.0 < 1.0 16 121 156 1.6 2.83 < 1.0 < 1.0 17 91 110 2.1 2.56 < 1.0 < 1.0 18 87 95 1.20 3.10 < 1.0 < 1.0 19 74 90 1.60 2.49 < 1.0 < 1.0 Maximum 121 168 3.1 13 6.01 20 3.0 2.0 < 2 Minimum 66 74 0.9 2 1.13 < 4 < 1 < 1.0 < 2 Average 86 111 1.6 6 2.50 7 1.3 1.3 < 2 #Tests 31 31 31 23 31 17 31 31 1 Site ACMW-01 BE Nitrate-Nitrogenand Water Level Chlorides 5 - 5510 50 4 5500 40 --- --- -- - 3 5490 30 J J 2 5480 E20 1 -- 5470 10 0 5460 0 ao rn m w rn w o 0 0 0 0 � m a m a rn m o 0 0 0 0 —�Nitrate t Water Level t Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 1 0.20 -- — I 400 0.15 300 - J J E E 0.10 - - -- --- 200 100 k A 0.05 0 0.00 —r—TDS Linear(TDS) t Total P Linear(Total P) Annual Metal Report ACMW-01BE Auxiliary Dam Ca . K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 10/31/1988 10 1.4 4.6 7.1 <10 700 <4 30 <0.1 <10 <20 690 <0.2 420 <5 <50 , <1 <1 <10 11/28/1989 12.5 1 5 13.8 <10 110 <10 <100 <1 <10 <50 150 <1 120 <10 <5 <50 8/1/1990 8.8. 0.6 3.3 5.3 <10 90 <4 34 <0.1 <10 <20 37 <0.2 25 <1 <1 <10 8/21/1991 it 0.9 5 5.4 <10 210 <4 49 <0.1 <10 <20 180 <0.2 54 <1 <1 <10 7/21/1992 30 0.8 4.1 5.4 <10 200 <4 45 <0.1 <10 <20 230 <0.2 49 <1 <3 <10 7/19/1994 11 0.8 4.4 5.8 <10 500 <2 54 0.1 <10 <20 330 <0.2 53 <1 <1 6.1 8/15/1995 13 0.8 5.3 6.5 <10 64 <1 59 <0.1 <10 <10 180 <0.2 80 <1 <1 9.5 6/19/1996 18 1 7.5 7.6 <10 140 <1 88 <0.1 <10 <10 220 <0.2 77 <1 <1 <5 6/16/1997 17 1.2 7.4 8.9 <10 170 <2 97 <0.5 <10 <25 480 <0.5 <10 <5 <5 <50 7/21/1998 7.85 0.687 3.25 5.52 <10 58 <2 <100 <0.5 <10 <20 333 <0.5 37.2 _ <2.5 <5 <25 6/20/1999 12.3 1.04 5.9 8.05 <10 160 <2 <100 <1 <0.1 <10 <20 171 <0.2 38.2 <5 <2.5 <3 <1 <1 <10 7/18/2000 5.94 0.694 3.24 6.24 <10 <2 <100 <20 348 <20 <2.5 <10 7/18/2000 9.85 1.19 3.05 10.3 <10 <2 <100 <20 78.6 54.4 <2.5 <10 6/19/2001 7.08 0.6 2.86 5.82 <10 <2 <100 <20 <100 <20 <2.5 <10 6/18/2002 6.60 0.589 2.54 5.7 <10 110 <2 37 <0.2 <0.2 <1 <20 135 0.02 <20 <1 <2.5 <1 <2 <0.2 <10 6/17/2003 5.86 1.02 2.95 5.99 <10 300 <2 39.9 <0.2 <0.2 <1 <20 330 <0.01 <20 <1 <2.5 <1 <2 <0.2 <10 5/18/2004 8.10 0.635 3.49 6.44 <10 210 <2 <100 <0.2 <0.2 <1 <20 126 0.01 <20 <1 <2.5 <1 <2 <0.2 <10 6/14/2005 10.20 0.562 4.20 7.00 <10 <2 <100 <20 121 <20 <2.5 <10 6/1/2006 9.89 0.791 4.08 7.11 <10 120 <2 <2 <2 <2 <20 328 <0.2 <20 <2 <2 <2.5 <2 <10 <1 <2 <10 6/19/2007 7.34 0.659 2.93 5.96 <10 88 2.12 37 <1 <0.5 <1 <20 601 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/4/2008 5.09 0.557 2.2 5.11 <10 1200 <2 35 <1 <0.5 <1 <20 626 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/17/2009 7.54 1.04 3.35 6.63 <10 1500 2.22 47 <1 <0.5 <1 <20 2820 <0.2 179 <2 <5 <2.5 <1 <5 <1 <3 17.5 6/9/2010 9.2 <1 3.90 6.90 <0.5 110 <1 44 <1 <0.5 <1 2.3 220 <0.2 7 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2011 14.1 1 6.16 9.04 <0.5 42.6 <1 60.4 <1 <0.5 <1 <2 545 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2012 24.9 <1 56.2 <1 <0.5 <1 <0.2 <2 <5 <1 <5 <1 <3 6/18/2013 7.35 0.562 2.91 5.69 6/17/2014 9.60 <1 4.35 6.89 <0.5 457 1.56 51.4 <1 <0.5 <1 <2 579 <0.2 23.7 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2015 11.0 1.37 5.36 7.3 <0.5 3600 <1 85.3 <1 <0.5 3.83 <10 4660 <0.2 106 2.24 <5 1.71 <1 <5 <1 8.92 <20 7/12/2016 14.8 <1 6.3 8.32 <0.5 867 <1 76.8 <1 <0.5 <1 <2 885 <0.2 15.3 <2 <5 <0.5 <1 <5 <1 <3 <20 7/19/2017 7.53 <1 3.29 5.47 <0.5 736 <1 41 <1 <0.5 <1 <2 779 <0.2 15.0 <2 <5 <0.5 <1 <5 <1 <3 <20 8/6/2018 8.76 <1 3.68 5.94 <0.5 446 <1 44.2 <1 <0.5 <1 <2 292 <0.2 5.95 <2 <5 <0.5 <1 <5 <1 <3 <20 8/13/2019 6.82 <1.0 2.82 5.51 <0.5 345 <1 32.9 <1 <0.5 <1 <2 182 <0.2 4.17 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-02N SOUTH TAHOE PUBLIC UTILITY DISTRICT ,LPINE COUNTY GROUNDWATER QUALITY DAT 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 1/15/2019 8.72 5460.98 11.3 6.36 59.3 0.022 < 0.05 < 0.020 < 0.020 1.18 1.13 101 4/11/2019 7.41 5462.29 11.9 6.28 56.4 0.019 < 0.070 < 0.020 < 0.010 0.638 0.620 78 8/13/2019 6.20 5463.50 12.7 6.38 52.3 0.016 < 0.10 < 0.020 < 0.010 0.552 0.487 83 10/8/2019 7.59 5462.11 13.9 6.15 55.9 0.021 < 0.100 < 0.020 < 0.010 0.480 0.444 81 Maximum 8.72 5463.5 13.9 6.38 59.3 0.022 < 0.100 < 0.020 < 0.020 1.18 1.13 101 Minimum 6.20 5461.0 11.3 6.15 52.3 0.016 < 0.050 < 0.020 < 0.010 0.480 0.444 78 Average 7.48 5462.2 12.5 6.29 56.0 0.020 < 0.080 < 0.020 < 0.013 0.713 0.670 86 #Tests 4 4 4 44 0 0 4 4 4 4 4 4 4 Site: ACMW-02N SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Fecal/ Fecal EC Chloride COD SO4 Color Coli E.coli Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 1/15/2019 142 2.34 4.14 < 1 < 1 4/11/2019 129 1.84 2.81 < 1 < 1 8/13/2019 114 1.93 2.86 < 1 < 1 10/8/2019 120 2.18 2.96 < 1 < 1 Maximum 142 2.34 4.14 < 1 < 1 Minimum 114 1.84 2.81 < 1 < 1 Average 126 2.07 3.19 < 1 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-02N SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 89 7.1 5458.7 12.4 8.47 89.0 58 7.29 0.039 0.086 0.031 < 0.010 0.108 0.174 90 6.8 5458.6 12.1 8.99 106.0 60 17.98 0.035 0.097 0.021 < 0.010 0.082 0.189 91 7.0 5458.4 11.9 7.96 79.0 56 2.48 0.023 0.098 0.041 0.015 0.093 0.207 92 7.0 5458.4 11.6 7.40 71.0 48 0.57 0.020 0.099 0.037 0.012 0.091 0.202 93 6.3 5462.3 11.9 7.28 68.0 48 1.25 0.017 0.096 0.024 0.013 0.085 0.195 94 7.1 5458.3 11.7 6.92 70.0 53 1.01 0.022 0.092 0.025 0.013 0.071 0.174 95 6.2 5459.2 12.2 6.84 63.0 45 0.68 0.020 0.106 0.023 0.011 0.086 0.203 96 5.8 5459.6 12.8 6.64 64.0 48 1.50 0.016 0.102 0.028 0.011 0.093 0.206 97 6.8 5458.6 12.7 6.55 65.0 54 0.94 0.017 0.094 0.020 0.011 0.091 0.198 98 6.0 5459.4 12.0 6.48 63.0 48 1.75 0.020 0.114 < 0.020 < 0.010 0.113 0.239 99 6.2 5459.2 11.9 6.49 59.0 47 0.40 0.021 0.117 < 0.020 < 0.010 0.135 0.262 00 6.2 5459.2 12.3 6.71 59.0 45 0.71 0.017 0.122 0.025 < 0.010 0.091 0.167 01 7.0 5458.4 12.4 6.70 60.0 45 1.12 0.017 0.113 < 0.020 < 0.010 0.059 0.184 02 6.5 5458.9 11.8 6.67 58.0 42 1.31 0.016 0.116 < 0.010 0.084 0.209 03 6.8 5458.6 12.8 6.77 53.7 1.60 0.015 0.094 < 0.010 0.104 0.205 04 6.6 5458.8 11.4 6.86 54.6 29 0.81 0.018 0.128 < 0.020 < 0.010 0.057 0.195 05 7.0 5458.4 11.0 6.63 51.7 41 0.39 0.015 0.097 < 0.010 0.149 0.278 06 6.5 5458.9 12.0 6.67 53.5 41 0.99 0.017 0.240 < 0.010 0.135 0.385 07 7.5 5457.9 12.5 6.50 56.5 43 1.09 0.017 0.050 < 0.010 0.093 0.128 08 7.7 5457.7 12.2 6.60 56.0 39 1.16 0.024 0.060 < 0.018 0.150 0.193 09 8.0 5457.4 11.9 6.41 55.8 45 0.71 0.016 < 0.050 0.011 0.198 0.233 10 7.5 5457.9 11.6 6.51 54.0 44 0.97 0.022 0.056 < 0.010 0.194 0.232 11 8.6 5456.8 12.3 6.51 57.1 45 0.81 0.021 0.058 < 0.011 0.142 0.143 12 9.7 5460.0 12.2 6.64 62.9 0.026 < 0.047 0.023 < 0.010 0.148 0.202 13 10.4 5459.3 12.3 6.63 65.5 0.042 0.075 0.028 < 0.009 0.119 0.173 14 9.9 5459.8 12.6 6.61 60.2 0.024 0.055 0.026 < 0.011 0.235 0.246 15 11.3 5458.4 13.4 6.58 59.6 0.021 < 0.050 < 0.020 < 0.010 0.391 0.396 16 9.3 5460.4 13.6 6.59 62.6 0.026 0.093 < 0.020 < 0.015 1.938 1.959 17 6.6 5463.1 12.6 6.62 61.3 0.021 0.098 < 0.023 < 0.030 2.173 2.245 18 7.58 5462.1 13.1 6.49 62.8 0.027 0.080 < 0.023 < 0.015 1.137 1.116 19 7.48 5462.2 12.5 6.29 56.0 0.020 < 0.080 < 0.020 < 0.013 0.713 0.670 Maximum 11.3 5463.1 13.6 8.99 106.0 60 17.98 0.042 0.240 0.041 0.030 2.173 2.245 Minimum 5.8 5456.8 11.0 6.29 51.7 29 0.39 0.015 0.047 < 0.020 < 0.009 0.057 0.128 Average 7.4 5459.2 12.2 6.84 63.2 47 2.07 0.022 0.092 0.024 0.012 0.302 0.381 #Tests 31 31 31 31 31 22 23 31 31 22 31 31 31 Site: ACMW-02N SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 89 130 231 5.9 5 9.73 < 2 < 2 90 113 195 4.9 < 5 6.56 5 < 2 < 2 91 113 165 4.8 < 5 5.40 < 5 < 2 < 2 92 99 157 3.5 < 5 5.09 < 5 < 2 < 2 93 100 145 2.4 8 4.94 < 5 3 < 2 < 2 94 100 150 2.9 < 5 4.72 < 4 < 2 < 2 95 90 135 2.3 5 4.29 5 2 2 96 95 136 2.5 2 3.11 5 1 1 97 97 147 6.8 2 4.83 5 1 1 98 95 141 3.5 < 5 3.32 < 5 1.4 < 1.1 99 90 134 3.2 < 5 2.77 < 5 3.6 2.4 2.0 00 90 129 2.8 < 5 3.15 < 5 < 1.1 < 1.1 01 87 128 3.0 9 3.01 10 < 1.1 < 1.1 02 85 122 2.6 < 5 2.56 5 < 1.1 < 1.1 03 85 118 3.0 < 5 2.38 < 5 < 1.1 < 1.1 04 82 114 2.7 < 5 2.29 6 < 1.1 < 1.1 05 79 115 2.9 < 5 2.29 < 5 < 1.1 < 1.1 06 85 120 2.8 6 2.30 < 1.1 < 1.1 07 84 124 2.9 < 5 2.24 < 1.1 < 1.1 08 85 119 2.9 < 5 2.25 < 5 < 1.1 < 1.1 09 84 122 2.6 < 5 2.18 < 1.1 < 1.1 10 82 117 2.1 5 2.26 < 1.1 < 1.1 11 88 121 2.2 5 2.36 < 1.1 < 1.1 12 97 133 2.9 2.71 < 1.1 < 1.1 13 99 140 3.1 2.86 < 1.2 < 1.1 14 93 129 2.7 2.75 2.9 < 1.1 15 95 137 2.5 2.81 < 1.0 < 1.0 16 102 152 3.1 3.75 < 1.0 < 1.0 17 105 151 1.8 3.07 < 1.0 < 1.0 18 100 141 1.65 3.00 2.6 < 1.0 19 86 126 2.07 3.19 < 1.0 < 1.0 Maximum 130 231 6.8 9 9.73 10 3.6 2.4 2.0 Minimum 79 114 1.7 2 2.18 < 4 1.0 1.0 < 2.0 Average 94 139 3.1 5 3.49 5 1.5 1.3 2.0 #Tests 31 31 31 23 31 17 31 31 2 Site ACMW-02N Nitrate-Nitrogen and Water Level Chlorides 5 - ---- — - --- 5470 50 5465 40 3 x 5460 m 30 J > J 2 -- J ob 5455 E 20 0 5450 10 --— -- — in w w w w w o 0 0 0 0 -1 5445 p en m w w w w w o 0 0 0 0 --�—Nitrate --41--Water Level Linear(Nitrate) t Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 --- 0.20 400 - 0.15 --- 300 - a b 0.10 - 200 E 100 0.05 - 0 0.00 w w w ---s--TDS Linear(TDS) —r—Total P Linear(Total P) Annual Metal Report ACMW-02N Access Gate Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn g/ g/ g/ g/ g/ g/ g/ g/ g/ g/ g/ g/ g/ g/ g/ mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L u L u L u L u L u L u L u L u L u L u L u L u L u L u L u L 11/2/1988 11 3.5 5.1 28 <10 4200 <4 76 <0.1 <10 <20 3800 <0.2 550 7 <50 3 <1 16 11/28/1989 18.1 1.7 4.6 9.2 <10 <100 <10 <100 <1 <10 <50 580 <1 530 <10 <5 <50 8/1/1990 28 3.2 2.7 15 <10 180 <4 120 <0.1 <10 <20 280 <0.2 230 <1 <1 <10 8/21/1991 30 2.8 4.3 12 <10 89 <4 140 <0.1 <10 <20 180 <0.2 260 <1 <1 <10 7/21/1992 14 1.8 3.1 14 <10 <50 <4 76 <0.1 <10 <20 40 <0.2 120 <1 <1 <10 7/19/1994 15 1.3 3.6 13 <10 280 <2 61 <0.1 <10 <20 140 <0.2 110 <1 <1 <5 8/15/199S 13 1.4 3 12 <10 <50 <1 55 <0.1 <10 <10 <30 <0.2 15 <1 <1 <5 6/19/1996 14 1.4 3.5 12 <10 120 <1 58 <0.1 <10 <10 <30 <0.2 66 <1 <1 <5 6/16/1997 15 1.5 3.8 12 <10 100 <2 <50 <0.5 <10 <25 74 <0.5 72 <5 <5 <50 7/21/1998 14.5 1.21 3.28 10.7 <10 119 <2 <100 <0.5 <10 <20 56.4 <0.5 65.8 <2.5 <5 <25 6/20/1999 10.9 1.33 3.17 10.9 <10 96 <2 <100 <1 <0.1 <10 <20 <100 <0.2 59.4 <5 <2.5 <3 <1 <1 <20 7/18/2000 6.01 3.07 1.61 24.9 <10 <2 <100 <20 92.8 <20 <2.5 <10 6/19/2001 11.6 1.22 3.56 9.99 <10 <2 <100 <20 <100 114 <2.5 <10 6/18/2002 11.0 1.38 2.69 10.2 <10 50 <2 43 <0.2 <0.2 <1 <20 <100 0.02 38.8 <1 <2.5 <1 <2 <0.2 <10 6/17/2003 9.37 1.23 3.01 9.11 <10 100 <2 41.4 <0.2 <0.2 <1 <20 <100 <0.01 56.1 <1 <2.5 <1 <2 <0.2 <10 5/18/2004 10.9 1.05 2.89 8.77 <10 '30. <2 <100 <0.2 <0.2 <1 <20 <100 0.02 28.6 <1 <2.5 <1 <2 <0.2 <10 6/14/2005 10.1 0.968 2.7 8.18 <10 <2 <100 <20 <100 <20 <2.5 <10 6/1/2006 9.91 1.12 2.85 8.77 <10 60 <2 <2 <2 <2 <20 128 <0.2 62.9 <2 <2 <2.5 <2 <10 <1 <2 <10 6/19/2007 12.4 1.14 3.18 8.38 <10 49 <2 38 <1 <0.5 <1 <20 <50 <0.2 34.5 <2 <5 <2.5 <1 <5 <1 <3 <10 6/4/2008 12.3 1.19 3.13 8.73 <10 100 <2 48 <1 1.5 6.8 <20 86.5 <0.2 91.2 6.5 <5 <2.5 3.5 <5 1.3 6.6 <10 6/17/2009 12.5 0.991 3.16 8.5 12.3 58 <2 41 <1 <0.5 <1 <20 <50 <0.2 43 <2 <5 <2.5 <1 <5 <1 <3 <10 6/9/2010 12.0 1.10 3.3 7.40 <0.5 260 <1 39 <1 <0.5 <1 400 33 <0.2 65 <2 <5 <0.5 <1 <5 <1 <3 28 6/14/2011 12.0 1.13 3.48 9.17 <0.5 28.6 <1 37.6 <1 <0.5 <1 <2 <20 <0.2 27.9 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2012 <20 <1 49.3 <1 <0.1 <1 <0.2 <2 <5 <1 <5 <1 <3 6/18/2013 13.7 1.06 3.3 9.66 6/17/2014 23.3 1.23 3.54 8.76 <0.5 33.5 <1 38.9 <1 <0.5 <1 <2 <20 <0.2 8.63 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2015 15.7 1.03 3.59 9.78 <0.5 87.6 <1 39.9 <1 <0.5 <1 <10 <20 <0.2 17.6 <2 <5 <0.5 <1 <5 <1 <3 <20 7/12/2026 13.0 1.02 3.68 7.91 <0.5 105 <1 41 <1 <0.5 <1 <2 19.8 <0.2 25 <2 <5 <0.5 <1 <5 <1 <3 <20 7/19/2017 14.6 1.04 4.42 7.66 <0.5 481 <1 40.9 <1 <0.5 <1 <2 46.7 <0.2 72.8 <2 <5 <0.5 <1 <5 <1 <3 <20 8/6/2018 15.1 <1 6.28 7.76 <0.5 1170 <1 47.3 <1 <0.5 <1 <2 70.4 <0.2 117 <2 <5 <0.5 <1 <5 <1 <3 <20 8/23/2019 12.0 <1.0 4.75 7.45 <0.5 673 • <1 44.3 <1 <0.5 <1 <2 47.9 <0.2 119 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-02S SOUTH TAHOE PUBLIC UTILITY DISTRICT LPINE COUNTY GROUNDWATER QUALITY DAT 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 1/15/2019 10.50 5461.10 11.3 6.14 53.1 0.014 0.103 < 0.020 < 0.020 0.159 0.262 91 4/11/2019 6.23 5465.37 9.5 5.97 48.8 0.016 0.080 < 0.020 < 0.010 1.40 1.48 73 8/13/2019 6.29 5465.31 13.6 6.23 56.1 0.017 < 0.10 < 0.020 < 0.010 0.015 < 0.10 82 10/8/2019 8.65 5462.95 16.7 5.93 60.3 0.019 0.118 < 0.020 < 0.010 0.044 0.162 84 Maximum 10.50 5465.4 16.7 6.23 60.3 0.019 0.118 < 0.020 < 0.020 1.400 1.480 91 Minimum 6.23 5461.1 9.5 5.93 48.8 0.014 0.080 < 0.020 < 0.010 0.015 < 0.10 73 Average 7.92 5463.7 12.8 6.07 54.6 0.017 0.100 < 0.020 < 0.013 0.405 0.501 83 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-02S SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Fecal/ Fecal EC Chloride COD SO4 Color Coli E.coli Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 1/15/2019 125 2.34 3.73 < 1 < 1 4/11/2019 127 2.43 3.33 < 1 < 1 8/13/2019 112 1.18 1.63 4.1 < 1 10/8/2019 124 1.92 2.30 4.1 < 1 Maximum 127 2.43 3.73 4.1 1 Minimum 112 1.18 1.63 < 1 < 1 Average 122 1.97 2.75 2.6 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-02S SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO,-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 89 7.1 5460.5 11.7 6.70 58.0 38 5.11 0.028 0.088 0.030 < 0.015 0.193 0.267 90 7.0 5460.2 11.8 7.07 55.0 38 2.06 0.021 0.094 0.023 < 0.010 0.155 0.259 91 7.0 5460.2 12.2 7.01 56.0 41 0.57 0.020 0.098 0.036 0.010 0.219 0.328 92 6.9 5460.3 11.6 6.76 49.0 37 0.76 0.022 0.094 0.029 0.010 0.093 0.197 93 6.6 5460.5 11.4 6.86 57.0 42 1.83 0.022 0.098 0.024 0.011 0.079 0.188 94 7.4 5459.8 12.5 6.84 54.0 42 2.92 0.030 0.114 0.027 < 0.010 0.087 0.210 95 6.8 5460.5 12.0 6.57 51.0 36 0.98 0.030 0.118 0.054 0.010 0.101 0.228 96 6.0 5461.2 12.6 6.37 54.0 42 1.35 0.036 0.137 0.029 0.011 0.081 0.229 97 7.4 5459.8 12.5 6.50 50.0 40 1.25 0.018 0.098 0.021 0.011 0.103 0.213 98 6.3 5460.9 12.0 6.28 50.0 36 0.83 0.021 0.128 < 0.021 < 0.010 0.138 0.277 99 6.6 5460.6 12.3 6.34 47.0 35 0.62 0.017 0.141 < 0.020 < 0.010 0.042 0.193 00 6.5 5460.7 12.3 6.62 46.0 41 0.68 0.016 0.118 < 0.024 < 0.010 0.035 0.110 01 7.7 5459.5 12.5 6.57 47.0 38 1.28 0.014 0.111 0.021 < 0.010 0.018 0.145 02 6.6 5460.6 12.4 6.45 48.0 38 0.99 0.014 0.149 < 0.010 0.186 0.370 03 6.9 5460.3 12.3 6.66 43.1 2.35 0.015 0.103 < 0.010 0.077 0.153 04 6.6 5460.6 11.3 6.52 46.9 28 0.61 0.017 0.157 0.020 < 0.010 0.139 0.347 05 7.3 5459.9 10.7 6.44 46.8 38 0.87 0.017 0.104 < 0.018 0.119 0.210 06 6.9 5460.3 12.5 6.34 47.2 36 1.82 0.016 0.309 < 0.010 0.123 0.444 07 8.1 5459.1 12.7 6.22 44.3 36 0.95 0.016 0.055 < 0.010 0.231 0.268 08 8.1 5459.1 11.9 6.34 46.0 39 1.02 0.018 0.058 < 0.010 0.341 0.375 09 8.4 5458.8 11.8 6.16 47.7 41 0.95 0.015 0.110 < 0.010 0.155 0.220 10 7.4 5459.8 11.7 6.33 45.4 37 0.78 0.021 0.078 < 0.010 0.096 0.145 11 9.6 5457.6 12.2 6.48 45.7 38 0.47 0.018 0.056 < 0.010 0.078 0.080 12 11.5 5460.1 12.2 6.54 46.4 0.021 0.059 0.023 < 0.010 0.201 0.263 13 12.4 5459.2 12.4 6.54 50.9 0.032 0.080 0.028 < 0.012 0.752 0.863 14 10.6 5461.0 13.0 6.29 38.9 0.024 0.058 0.025 < 0.012 1.565 1.185 15 12.4 5459.2 13.8 6.15 42.0 0.019 0.108 < 0.020 < 0.020 3.038 3.093 16 8.91 5462.7 13.9 6.18 41.5 0.025 0.073 < 0.020 < 0.038 2.333 2.210 17 6.30 5465.3 11.9 6.23 45.3 0.019 0.103 0.023 < 0.023 0.778 0.850 18 8.46 5466.0 14.1 6.19 56.0 0.027 0.086 0.022 < 0.010 0.265 0.313 19 7.92 5463.7 12.8 6.07 54.6 0.017 0.100 < 0.020 < 0.013 0.405 0.501 Maximum 12.4 5466.0 14.1 7.07 58.0 42 5.11 0.036 0.309 0.054 0.038 3.038 3.093 Minimum 6.0 5457.6 10.7 6.07 38.9 28 0.47 0.014 0.055 < 0.020 < 0.010 0.018 0.080 Average 7.9 5460.6 12.3 6.47 48.7 38 1.35 0.021 0.106 0.025 0.012 0.394 0.475 #Tests 31 31 31 31 31 22 23 31 31 22 31 31 31 Site: ACMW-02S SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coll E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 89 85 133 1.8 5 4.78 4 < 2 90 80 123 1.5 5 3.80 5 < 2 < 2 91 84 121 1.8 < 5 5.34 < 5 < 2 < 2 92 77 103 1.6 6 3.70 < 5 < 2 < 2 93 91 118 1.4 < 5 3.58 < 5 6 < 2 < 2 94 83 118 1.4 < 5 3.88 6 2 < 2 95 78 111 1.9 5 3.35 5 2 2 96 80 116 1.7 2 2.08 5 1.5 1.0 97 78 107 1.8 4 2.96 5 3.7 1.0 98 74 108 2.0 < 5 2.71 < 5 5.3 < 1.1 99 70 101 1.5 < 5 2.52 < 5 3.7 < 1.1 00 72 97 1.6 < 5 1.41 < 5 2.5 < 1.1 01 69 97 1.7 7 1.38 8 1.3 < 1.1 02 75 103 2.5 < 5 1.51 5 4.0 1.2 03 70 96 2.3 < 5 1.49 < 5 1.4 < 1.1 04 76 101 2.7 < 5 1.41 7 3.1 < 1.1 05 73 101 2.4 < 5 1.85 5 < 1.1 < 1.1 06 77 105 2.2 < 5 1.38 < 1.2 < 1.1 07 73 102 2.6 6 1.75 2.9 1.2 08 75 101 2.3 < 5 2.22 < 5 3.5 < 1.1 09 74 108 1.9 6 2.53 < 4.8 < 1.1 10 72 106 1.6 6 2.56 < 9.1 < 1.1 11 76 100 1.4 7 1.96 2.3 < 1.1 12 75 99 1.4 2.52 < 1.1 < 1.1 13 88 119 2.5 4.76 < 1.3 < 1.1 14 82 101 1.9 4.83 7.7 1.2 15 89 126 1.7 4.56 3.2 < 1.0 16 70 112 1.7 5.86 60.2 < 1.0 17 81 109 1.7 4.78 5.4 < 1.0 18 87 117 1.74 3.17 22.8 2.6 19 83 122 2.0 2.75 2.6 1.0 Maximum 91 133 2.7 7 5.86 8 60.2 2.6 < 2 Minimum 69 96 1.4 2 1.38 < 5 < 1.1 1.0 < 2 Average 78 109 1.9 5 3.01 5 5.7 1.3 < 2 '#Tests 31 31 31 23 31 17 31 31 1 Site ACMW-02S Nitrate-Nitrogen and Water Level Chlorides 5 — ----- 5470 50 4 40 5465 - 5460 d J 30 J a$ E 2 J E 5455 20 - 1 10 0 5450 c0 N nT � M h n O) �f Of I rn m rn m rn o 0 0 -1 5445 m M m rn rn rn rn m o 0 0 0 0 t Nitrate Water Level Linear(Nitrate) t Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 - ------ 0.20 — -- 400 0.15 - 300 J E E 0.10 200 0.05 100 0 0.00 rn r w - rn M u> rn m rn rn rn rn rn o 0 0 0 0 m rn rn a rn rn o 0 0 0 0 t TDS Linear(TDS) ---*----Total P Linear(Total P) Annual Metal Report ACMW-02S Access Gate Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 10/31/1988 9.7 2.1 3 9.9 <10 200 <4 30 <0.1 <10 <20 260 <0.2 190 6 <50- <1 <1 <10 11/28/1989 10.7 1.3 3.8 16 <10 <100 <10 <100 <1 <10 <50 <100 <1 <10 <10 <5 <50 8/1/1990 it 1.9 2.8 9.2 <10 <50 <4 57 <0.1 <10 <20 <30 <0.2 28 <1 <1 <20 8/21/1991 11 1.9 3 7.1 <10 <50 <4 53 <0.1 <10 <20 <30 <0.2 10 <1 <1 <10 7/21/1992 12 1.8 2.8 8.4 <10 <50 <4 55 <0.3 <10 <20 <0.2 <1 <1 <20 7/19/1994 13 1.8 3.2 7.1 <10 310 <2 69 0.1 <10 <20 320 <0.2 76 <1 <1 6 8/15/1995 12 1.8 2.9 6.8 <10 <50 <1 59 0.2 <10 <10 <30 <0.2 <5 <1 <1 <5 6/19/1996 12 1.8 2.8 6 <10 78 <1 54 <0.1 <10 <10 <30 <0.2 <5 <1 <1 <5 6/16/1997 9.7 1.8 2.4 6.5 <10 75 <2 <50 7.4 <10 <25 <50 <0.5 <10 <5 <5 <50 7/21/1998 11.1 1.77 2.36 6.31 <10 65 <2 <100 <0.5 <10 <20 63.9 <0.5 <20 <2.5 <5 <25 6/20/1999 7.93 1.70 3.43 5.73 <10 <50 <2 <100 <1 <0.1 <10 <20 <100 <0.2 <20 <5 <2.5 <3 <1 <1 <10 7/18/2000 8.28 1.76 2.37 6.06 <10 <2 <100 <20 89.6 <20 <2.5 <10 7/18/2000 45.6 8.04 16.2 44.9 <10 4.88 314 <20 1295 253 <2.5 <10 6/19/2001 9.14 1.61 2.06 5.15 <10 <2 <100 <20 <100 <20 <2.5 <10 6/18/2002 8.88 1.68 2.03 5.17 <10 20 <2 44 <0.2 <0.2 <1 <20 <100 0.02 <20 <1 <2.5 <1 <2 <0.2 <10 6/17/2003 9.58 1.44 2.53 5.57 <10 <10 <2 51.7 <0.2 <0.2 <1 <20 <100 <0.01 <20 <1 <2.5 <1 <2 <0.2 <10 5/18/2004 8.71 1.66 2.15 4.99 <10 20 <2 <100 <0.2 <0.2 <1 <20 <100 <0.01 <20 <1 <2.5 <1 <2 <0.2 <10 6/14/2005 9.02 1.40 2.02 4.97 <10 <2 <100 <20 <100 <20 <2.5 <10 6/1/2006 9.11 1.72 2.23 5.54 <10 50 <2 <2 <2 <2 <20 163 <0.2 <20 <2 <2 <2.5 <2 <10 <1 <2 <10 6/19/2007 10.1 1.73 2.2 5.54 <10 62 <2 46 <1 <0.5 <1 <20 112 <0.2 <2 <2 <5 <2.5 <1 <5 <1 <3 <10 6/4/2008 9.61 1.79 2.15 5.20 <10 78 <2 49 <1 <0.5 <1 <20 249 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/17/2009 10.5 1.75 2.42 5.67 _ 15.4 39 <2 51 <1 <0.5 <1 <20 92.6 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 12.8 6/9/2010 10.0 1.70 2.4 5.20 <0.5 91 <1 46 <1 <0.5 <1 <2 62 <0.2 3 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2011 9.56 1.71 2.4 5.19 <0.5 43.9 <1 41.9 <1 <0.5 <1 <2 358 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2012 40.9 <1 43.2 <1 <0.5 <1 <0.2 <2 <5 <1 <5 <3 <3 6/18/2013 12.6 1.96 2.77 5.32 6/17/2014 7.08 1.63 1.80 4.39 <0.5 315 1.46 34.6 <1 <0.5 <1 <2 1080 <0.2 2.47 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2015 12.1 1.70 2.67 5.10 <0.5 <20 <1 <2 <1 <0.5 <1 <10 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/12/2016 11.7 1.87 2.73 5.58 <0.5 279 <1 55.7 <1 <0.5 <1 <2 189 <0.2 2.14 <2 <5 1.66 <1 <5 <1 <3 <20 7/19/2017 11.2 1.83 2.56 6.18 <0.5 37 <1 49.9 <1 <0.5 <1 <2 36.2 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/6/2018 11.6 1.88 2.55 6.63 <0.5 22.5 <1 56.4 <1 <0.5 <1 <2 58.6 <0.2 5.74 <2 <5 <0.5 <1 <5 <1 <3 <20 8/13/2019 12.8 1.92 2.78 6.58 <0.5 <20 <1 62.6 <1 <0.5 <1 <2 <20 <0.2 3.32 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-04W SOUTH TAHOE PUBLIC UTILITY DISTRICT LPINE COUNTY GROUNDWATER QUALITY DAT 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU m /L mg/L mg/L mg/L mg/L mg/L mg/L 01/15/19 20.91 4898.98 11.1 6.38 46.0 0.016 < 0.05 < 0.020 < 0.020 1.50 1.51 131 04/11/19 12.41 4907.48 11.5 5.91 45.1 0.016 < 0.07 < 0.020 < 0.010 1.88 1.94 113 08/13/19 7.72 4912.17 11.8 6.10 40.2 0.016 < 0.10 < 0.020 < 0.020 1.66 1.61 126 10/08/19 12.10 4907.79 12.8 5.59 44.1 0.016 < 0.10 < 0.020 < 0.010 1.45 1.34 122 Maximum 20.91 4912.17 12.8 6.38 46.0 0.016 < 0.10 < 0.020 < 0.020 1.88 1.94 131 Minimum 7.72 4898.98 11.1 5.59 40.2 0.016 < 0.05 < 0.020 < 0.010 1.45 1.34 113 Average 13.29 4906.61 11.8 6.00 43.9 0.016 < 0.08 < 0.020 < 0.015 1.62 1.60 123 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-04W SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Fecal/ Fecal EC Chloride COD SO4 Color Coli E.coli Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 01/15/19 182 10.3 19.1 13.4 < 1 04/11/19 176 10.5 16.9 1.0 < 1 08/13/19 183 20.1 11.9 1.0 < 1 10/08/19 190 17.7 13.8 < 1 < 1 Maximum 190 20.10 19.1 13.4 < 1.0 Minimum 176 10.30 11.9 < 1 < 1.0 Average 183 14.65 15.4 4.1 < 1.0 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-04W SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 89 14.2 4901.7 11.3 6.10 34.0 77 61.58 0.163 0.127 0.028 < 0.010 0.82 0.958 90 14.0 4902.7 12.4 6.25 33.0 97 4.90 0.034 0.104 0.020 < 0.010 0.99 1.100 91 15.1 4900.8 12.3 6.37 33.0 98 7.20 0.028 0.133 0.053 0.010 1.51 1.652 92 15.4 4900.5 11.9 6.24 34.0 96 3.10 0.038 0.118 0.026 0.012 1.74 1.868 93 12.2 4903.7 11.8 6.18 38.0 83 4.75 0.028 0.111 0.025 0.010 2.22 2.337 94 15.2 4900.7 12.2 6.23 40.0 76 1.27 0.069 0.121 0.033 0.011 3.55 3.676 95 12.9 4903.0 12.3 6.20 39.0 66 0.69 0.029 0.165 0.029 0.010 4.42 4.593 96 13.2 4902.7 12.5 6.11 43.0 62 3.08 0.028 0.181 0.021 0.013 3.03 3.219 97 11.9 4904.0 12.0 6.14 49.0 62 1.88 0.026 0.108 0.020 0.011 2.51 2.634 98 13.2 4902.7 12.0 5.82 53.0 52 5.30 0.027 0.203 < 0.024 < 0.010 3.20 3.416 99 13.4 4902.5 11.8 5.80 53.0 49 3.87 0.031 0.238 < 0.021 < 0.010 2.61 2.860 00 14.0 4901.9 11.6 6.23 52.0 47 1.75 0.018 0.118 0.021 < 0.011 2.65 2.721 01 14.2 4901.7 11.8 6.26 49.0 45 8.19 0.037 0.143 < 0.020 < 0.019 2.41 2.640 02 13.9 4902.0 12.0 6.15 46.0 47 4.46 0.024 0.343 < 0.019 2.29 2.651 03 13.8 4902.1 12.4 6.55 43.0 1.64 0.014 0.086 < 0.020 1.79 1.880 04 15.0 4900.9 11.3 6.21 44.2 29 0.33 0.019 0.133 < 0.020 < 0.020 1.70 1.862 05 14.7 4901.2 11.7 6.30 42.8 43 1.60 0.028 0.155 < 0.019 1.96 2.135 06 13.4 4902.5 12.2 6.15 39.6 42 1.55 0.015 0.138 < 0.049 5.31 5.086 07 15.7 4900.2 13.0 6.14 38.6 41 0.91 0.015 0.064 < 0.083 7.46 7.570 08 16.4 4899.5 12.2 6.24 42.8 33 3.90 0.021 0.057 < 0.064 5.49 5.573 09 15.1 4900.8 11.9 5.97 44.5 47 1.43 0.015 < 0.050 < 0.051 4.43 4.505 10 14.3 4901.6 12.6 6.10 48.6 43 1.07 0.020 < 0.050 < 0.040 3.57 3.636 11 12.9 4903.0 11.5 6.08 48.7 38 0.81 0.022 < 0.066 < 0.028 2.40 2.364 12 15.3 4904.6 12.3 5.99 47.4 0.021 < 0.093 0.023 < 0.028 2.34 2.508 13 15.3 4904.6 12.4 6.02 42.9 0.043 0.113 0.029 < 0.023 2.53 2.557 14 15.0 4904.9 11.8 6.18 40.1 0.018 0.100 0.029 < 0.019 1.90 1.920 15 17.2 4902.7 12.5 6.05 39.6 0.017 0.053 < 0.020 < 0.020 1.80 1.830 16 17.0 4902.9 12.7 6.04 40.0 0.022 0.105 < 0.020 < 0.035 1.72 1.813 17 12.5 4907.4 12.4 6.21 42.2 0.028 0.110 0.030 < 0.028 1.59 1.678 18 14.7 4905.2 12.4 6.19 45.5 0.031 0.083 0.024 < 0.015 1.94 1.88 19 13.3 4906.6 11.8 6.00 43.9 0.016 < 0.080 < 0.020 < 0.015 1.62 1.600 Maximum 17.2 4907.4 13.0 6.55 53.0 98 61.58 0.163 0.343 0.053 0.083 7.46 7.570 Minimum 11.9 4899.5 11.3 5.80 33.0 29 0.33 0.014 0.050 < 0.020 < 0.010 0.82 0.958 Average 14.3 4902.6 12.1 6.14 42.9 58 5.45 0.030 0.121 0.025 0.023 2.69 2.797 #Tests 31 31 31 31 31 22 23 31 31 22 31 31 31 Site: ACMW-04W SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coll E.coil Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 89 244 310 52.2 5 18.65 9 < 2 90 230 329 53.1 6 29.30 < 5 2 < 2 91 222 313 50.5 < 5 31.42 < 5 2 < 2 92 222 311 49.5 7 32.04 < 5 4 < 2 93 204 301 37.6 6 29.75 < 5 7 < 2 < 2 94 181 271 29.3 < 5 25.85 7 12 < 2 95 176 268 29.9 5 22.95 5 6 2 96 163 240 24.4 3 19.95 5 18.1 1.1 97 151 220 20.1 2 15.30 5 7.8 3.6 98 144 211 14.3 < 5 13.95 < 5 15.1 < 1.1 99 135 199 12.4 6 10.45 < 5 7.4 < 1.1 00 134 192 13.8 5 8.84 < 5 3.9 1.1 01 131 192 18.3 6 7.50 < 5 1.2 < 1.1 02 139 207 25.4 16 6.93 10 5.1 < 1.1 03 136 199 25.1 < 5 8.60 5 9.3 < 3.1 04 134 193 22.1 < 5 9.62 6 3.9 < 1.1 05 135 183 23.1 < 5 9.94 < 5 1.8 < 1.1 06 143 212 19.0 < 5 9.75 < 1.1 < 1.1 07 146 213 12.6 < 5 10.20 15.7 < 2.9 08 137 181 13.5 < 5 9.70 5 7.4 < 1.1 09 147 233 22.9 6 8.46 1.5 < 1.1 10 145 215 21.3 < 5 7.96 6.3 < 1.1 11 138 196 17.0 < 5 7.99 8.5 1.6 12 129 180 12.7 9.77 11.2 < 1.1 13 132 183 13.9 13.42 7.2 < 1.1 14 129 185 14.2 17.46 5.0 < 1.1 15 138 202 16.4 20.05 78.3 < 1.0 16 142 215 21.2 18.25 6.8 < 1.0 17 140 211 20.4 16.15 362.0 < 1.0 18 132 189 14.1 18.85 10.7 < 1.0 19 123 183 14.7 15.43 4.1 < 1.0 Maximum 244 329 53.1 16 32.04 10 362.0 3.6 < 2 Minimum 123 180 12.4 2 6.93 < 5 1.1 < 1.0 < 2 Average 155 224 23.7 6 15.63 5 20.7 1.5 < 2 #Tests 31 31 31 23 31 17 31 31 1 Site ACMW-04W Nitrate-Nitrogen and Water Level Chlorides 10 4910 too 9 4908 90 8 4906 ao 7 4904 70 6 4902 so J > rJ 4900 J E 50 E 4 4898 � ao 3 4898 3r 30 2 4894 20 1 4892 to m c n n rn m rn rn 4890 0 ao rn rn rn a a o 0 0 0 0 � w rn r o rn n n a ao rn rn rn rn rn o 0 0 0 0 +Nitrate f Water Level Linear(Nitrate) cnmrbe L­r(cmo w) Total Dissolved Solids (TDS) Total Phosphorus 500 0.50 400 - 0.40 300 0.30 E £ 200 0.20 100 - — 0.10 0 0.00 rn m rn u � or t—TDS Linear(TDS) --- Total P Linear(Total P) Annual Metal Report ACMW-04W Gansberg Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 10/31/1988 20 3.8 5.4 12 <10 1300 <4 120 <0.1 <10 <20 790 <0.2 430 <5 <50 1 <1 <10 11/28/1989 31.4 4 7.7 40.6 <10 130 <10 220 <1 <10 <50 140 <1 17 <10 <5 <50 8/1/1990 27 4.2 6 16 <10 170 <4 180 <0.1 <10 <20 120 <0.2 13 <1 <1 <10 8/21/1991 25 4.2 6.3 15 <10 <50 <4 160 <0.1 <10 <20 <30 <0.2 <10 <1 <1 <10 7/21/1992 30 4.4 6.5 20 <10 230 <4 190 0.1 <10 <20 340 <0.2 14 <1 <1 <10 7/12/1994 22 3.7 4.8 20 <10 350 <2 140 <0.1 <10 <20 290 <0.2 6.5 <1 <1 <5 8/15/1995 21 3.8 4.7 20 <10 51 <1 150 0.1 <10 <10 <30 <0.2 <5 <1 <1 <5 6/19/1996 19 3.5 4.3 19 <10 95 1 140 <0.1 <10 <10 <30 <0.2 <5 <3 <1 <5 6/16/1997 17 4.2 4 20 <10 67 <2 220 <0.5 <10 <25 83 <0.5 <10 <5 <5 <50 7/21/1998 26.2 3.35 3.36 19.4 <10 133 <2 <100 <0.5 <10 <20 73.9 <0.5 <20 <2.5 <5 <25 6/20/1999 11.4 3.16 2.02 17.7 <10 82 <2 <100 <1 <0.1 <10 <20 <100 <0.2 <20 <5 <2.5 <3 2 <1 10.2 7/18/2000 9.41 3.03 2.73 17.9 <10 <2 122 <20 119 <20 <2.5 <10 6/19/2001 12.9 3.13 2.82 19.7 <10 <2 <100 <20 <100 <20 <2.5 <10 6/18/2002 13.7 3.6 2.92 22.4 <10 <10 <2 98 <0.2 <0.2 <1 <20 <100 0.02 <20 <1 <2.5 <1 <2 <0.2 <10 6/17/2003 11.5 2.84 2.83 21.8 <10 <10 <2 106 <0.2 <0.2 <1 <20 <100 <0.01 <20 <1 <2.5 <1 <2 <0.2 <20 5/18/2004 10.9 2.95 2.6 20.0 <10 <10 <2 <100 <0.2 <0.2 <1 <20 <100 <0.01 <20 <1 <2.5 <1 <2 <0.2 <10 6/14/2005 11.0 2.87 2.55 19.3 <10 <2 <100 <20 <100 <20 <2.5 <10 6/1/2006 12.5 3 2.47 19.7 <10 <50 <2 <2 27 <2 <20 <100 <0.2 <20 <2 <2 <2.5 <2 <10 <1 <2 10.2 6/19/2007 12.1 3.11 2.55 22.8 <10 21 <2 85 <1 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <2 <5 <1 <3 <10 6/4/2008 10.7 3.15 2.25 20.8 <10 42 <2 110 <1 <0.5 <1 <20 66 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/18/2009 12.9 3.37 2.96 23.1 13.7 33 <2 100 <1 <0.5 <1 <20 94.2 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 15.1 6/9/2010 14.0 3.10 3.10 24.0 <0.5 <20 <1 100 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2011 12.4 3.14 2.98 25.2 <0.5 45.4 <1 92.8 <S <0.5 <1 <2 464 <0.2 2.01 <2 <5 <0.5 <1 <5 <1 <3 <20 6/14/2012 <20 <1 81.5 <1 <0.5 <1 <0.2 <2 <5 <1 <5 <1 <3 6/18/2013 9.6 2.8 1.90 21.8 6/17/2014 10.6 2.92 2.44 24.2 <0.5 <20 <1 78.9 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/15/2015 9.33 2.64 2.18 21.9 <0.5 <20 <1 85.5 <1 <0.5 <1 <10 26.4 <0.2 <2 <2 <5 <0.5 <1 <5 <S <3 <20 7/12/2016 11.2 2.91 2.66 24.9 <0.5 <20 <1 91.6 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/19/2017 12.7 3.27 2.81 25.1 <0.5 <20 <1 95.1 <1 <0.5 <1 <2 39.3 <0.2 <2 <2 <5 <0.5 <2 <5 <1 <3 <20 8/2/2018 10.1" 2.66 2.24 23.4 <0.5 <20 <1 81.3 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5. <1 <5 <1 <3 <20 8/13/2019 10.3 2.55 2.24 22.4 <0.5 <20 <1 82.3 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-06S SOUTH TAHOE PUBLIC UTILITY DISTRICT _PINE COUNTY GROUNDWATER QUALITY DAl 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 1/15/2019 14.71 5208.79 11.9 7.38 225 0.094 0.150 < 0.020 < 0.020 0.021 0.171 390 4/11/2019 15.24 5208.26 12.4 7.25 186 0.068 0.119 < 0.020 < 0.020 0.081 0.200 351 8/13/2019 15.95 5207.55 13.1 7.25 194 0.092 0.122 < 0.020 < 0.010 0.022 0.144 361 10/8/2019 16.00 5207.50 12.4 7.04 231 0.073 0.137 < 0.020 < 0.010 0.039 0.176 399 Maximum 16.00 5208.8 13.1 7.38 231 0.094 0.150 < 0.020 < 0.020 0.081 0.200 399 Minimum 14.71 5207.5 11.9 7.04 186 0.068 0.119 < 0.020 < 0.010 0.021 0.144 351 Average 15.48 5208.0 12.5 7.23 209 0.082 0.132 < 0.020 < 0.015 0.041 0.173 375 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-06S SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Fecal/ Fecal EC Chloride COD SO4 Color Coli E.coli Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 1/15/2019 636 54.4 24.6 < 1 < 1 4/11/2019 596 60.1 25.0 < 1 < 1 8/13/2019 587 53.9 21.2 < 1 < 1 10/8/2019 621 58.8 22.6 < 1 < 1 Maximum 636 60.1 25.0 < 1 < 1 Minimum 587 53.9 21.2 < 1 < 1 Average 610 56.8 23.4 < 1 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-06S SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 1989 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NOz-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 89 14.8 5205.9 11.9 9.29 209 170 29.13 0.060 0.253 0.119 < 0.010 0.028 0.292 90 14.9 5205.9 12.7 8.12 207 276 12.33 0.069 0.152 0.028 0.010 0.065 0.227 91 14.5 5206.2 12.2 8.20 207 136 34.00 0.064 0.413 0.169 0.015 0.066 0.494 92 14.9 5205.8 12.1 8.57 195 344 2.30 0.049 0.288 0.068 0.012 0.066 0.366 93 14.6 5206.1 12.0 8.84 196 226 16.60 0.039 0.342 0.129 0.015 0.075 0.433 94 14.9 5205.8 12.1 9.00 182 230 19.07 0.056 0.347 0.092 0.017 0.068 0.433 ,95 15.9 5204.8 12.3 7.83 228 270 0.89 0.055 0.250 0.076 0.011 0.079 0.340 96 14.9 5205.8 12.5 8.55 243 299 12.10 0.056 0.647 0.231 0.017 0.035 0.699 97 14.7 5206.0 12.0 8.79 201 228 18.23 0.070 1.404 0.410 0.031 0.044 1.479 98 15.6 5205.1 11.3 9.36 175 163 29.30 0.037 0.506 0.181 0.032 0.049 0.589 99 15.9 5204.8 11.6 7.84 258 302 0.96 0.091 0.358 0.097 0.025 0.061 0.444 00 16.1 5204.6 11.5 7.04 253 330 0.80 0.048 0.176 0.047 0.020 0.021 0.137 01 16.4 5204.3 12.2 6.98 250 259 1.28 0.041 0.237 0.021 0.023 0.042 0.324 02 15.9 5204.8 11.8 7.90 225 181 26.02 0.041 0.297 0.014 0.050 0.365 03 15.5 5205.2 12.5 7.87 203 9.55 0.027 0.209 0.024 0.067 0.290 04 15.9 5204.8 11.9 7.78 194 152 9.43 0.037 0.236 0.108 0.072 0.074 0.372 05 15.5 5205.3 11.5 7.97 186 191 6.26 0.050 0.303 0.035 0.079 0.421 06 15.6 5205.1 12.2 7.52 205 244 0.65 0.045 0.210 0.039 0.065 0.303 07 16.1 5204.6 12.8 7.96 179 152 6.30 0.031 0.192 0.064 0.078 0.239 08 15.7 5205.0 12.6 7.74 215 256 1.04 0.056 0.223 0.059 0.050 0.201 09 15.5 5205.2 11.6 7.32 203 221 4.53 0.038 0.232 0.034 0.074 0.224 10 15.7 5205.0 12.0 8.13 186 166 13.30 0.048 0.270 0.022 0.060 0.217 11 15.2 5205.5 11.6 8.21 169 254 1.16 0.044 0.150 0.022 0.078 0.226 12 15.7 5207.8 12.4 8.00 190 0.054 .0.162 0.059 0.029 0.058 0.239 13 15.6 5207.9 12.7 7.20 227 0.090 0.182 0.041 0.016 0.044 0.216 14 15.8 5207.7 12.3 7.59 229 0.074 0.094 0.029 0.015 0.034 0.114 15 16.2 5207.3 12.5 8.07 191 0.032 0.140 0.037 < 0.010 0.092 0.232 16 16.1 5207.4 12.9 8.51 167 0.035 0.142 0.060 < 0.018 0.105 0.260 17 15.5 5208.0 13.5 7.20 205 0.081 0.117 0.026 < 0.020 0.039 0.148 18 15.66 5207.8 13.3 7.42 216 0.097 0.125 0.022 < 0.023 0.044 0.169 19 15.5 5208.0 12.5 7.23 209 0.082 0.132 < 0.020 < 0.015 0.041 0.173 Maximum 16.4 5208.0 13.5 9.36 258 344 34.00 0.097 1.404 0.410 0.072 0.105 1.479 Minimum 14.5 5204.3 11.3 6.98 167 136 0.65 0.027 0.094 0.020 < 0.010 0.021 0.114 Average 15.5 5205.9 12.2 8.00 207 230 11.10 0.055 0.283 0.094 0.025 0.059 0.344 #Tests 31 31 31 31 31 22 23 31 31 22 31 31 31 Site: ACMW-06S SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coll E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 89 359 666 70.3 6 37.1 < 2 < 2 90 422 673 75.9 6 33.1 < 5 9 4 91 408 654 86.4 < 5 22.4 5 8 3 92 424 705 90.7 < 5 25.2 13 3 < 2 93 401 679 86.1 7 24.8 < 5 6 < 2 < 2 94 368 643 93.4 5 25.4 < 4 4 2 95 430 719 92.5 5 28.0 8 3 2 96 437 667 85.9 17 29.0 5 12.1 7 97 368 568 77.6 10 25.2 8 12.6 2.8 98 315 555 76.8 6 25.0 < 5 17.6 2.6 99 415 680 76.6 < 5 46.3 5 5.8 < 1.1 00 454 741 74.9 < 5 32.8 < 5 < 1.1 < 1.1 01 440 722 72.8 7 30.5 < 5 < 1.1 < 1.1 02 393 640 69.2 6 27.1 10 < 1.1 < 1.1 03 381 639 69.3 < 5 26.5 < 5 < 1.1 < 1.1 04 377 572 67.8 6 26.1 8 2.9 < 1.1 05 358 542 68.9 < 5 25.8 5 1.9 < 1.1 06 382 638 63.5 < 9 25.7 1.3 < 1.1 07 356 604 61.4 5 25.1 < 1.1 < 1.1 08 378 625 62.0 6 25.8 12 1.2 < 1.1 09 366 578 61.0 < 5 24.7 < 1.1 < 1.1 10 351 574 60.3 6 23.0 1.4 < 1.1 11 336 570 61.2 8 22.4 8.7 < 1.1 12 366 598 59.6 23.7 1.3 < 1.1 13 380 617 56.8 25.2 5.1 < 1.1 14 387 642 58.2 26.8 1.7 < 1.1 15 355 592 60.7 28.6 7.4 < 1.0 16 330 541 62.0 31.6 1.0 < 1.0 17 353 622 56.5 26.3 1.0 < 1.0 18 375 605 56.3 25.8 4.1 < 1.0 19 375 610 56.8 23.4 < 1.0 < 1.0 Maximum 454 741 93.4 17 46.3 13 17.6 7.0 < 2 Minimum 315 541 56.3 < 5 22.4 < 4 < 1.0 < 1.0 < 2 Average 382 628 70.0 7 27.4 7 4.2 1.7 < 2 #Tests 31 31 31 23 31 17 31 31 1 Site ACMW-06S Nitrate-Nitrogen &Water Level Chlorides 5 5210 200 180 4 5208 160 140 3 - 5206 120 a► a, 100 E vv� E 2 5204 m 80 io 3 60 1 5202 40 20 0 � 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l/8n l/8n l/On l/8n 1/8n 1/8n 1/8n 1/8n l/8n 1/8w l/8w l/Sw 1/8w uZ A Il as qS qd !N ow uw 8H al n:) J:) PJ as Be Sd IV 2v eN 8W N e:) oila:) - S90-M W DV :podaa jejaW lenuud Site: ACMW-20 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 1/23/2019 13.92 5076.38 12.0 5.87 30.5 0.059 0.30 < 0.020 < 0.010 3.11 3.41 5/22/2019 4.99 5085.31 8.8 6.71 36.1 0.054 < 0.05 < 0.020 < 0.030 4.35 4.06 8/14/2019 8.39 5081.91 13.7 6.20 29.8 0.070 < 0.10 < 0.020 < 0.010 0.075 0.141 11/21/2019 14.39 5075.91 13.3 5.43 32.9 0.068 < 0.050 < 0.020 < 0.010 0.146 0.139 Maximum 14.39 5085.31 13.7 6.71 36.1 0.070 0.30 < 0.020 < 0.030 4.35 4.06 Minimum 4.99 5075.91 8.8 5.43 29.8 0.054 < 0.050 < 0.020 < 0.010 0.075 0.139 Average 10.42 5079.88 12.0 6.05 32.3 0.063 0.125 < 0.020 < 0.015 1.92 1.94 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-20 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 1/23/2019 75 106 1.97 2.36 < 1 < 1 5/22/2019 105 139 5.99 5.70 < 1 < 1 8/14/2019 73 68.3 0.838 0.950 95.9 < 1 11/21/2019 60 82.8 2.92 1.77 3.0 < 1 Maximum 105 139 5.99 5.70 95.9 < 1 Minimum 60 68.3 0.84 0.95 < 1 < 1 Average 78 99.0 2.93 2.70 25.2 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-20 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 10.9 5079.4 11.5 6.11 33.4 1.20 0.054 0.073 0.025 < 0.010 0.516 0.599 13 10.6 5079.7 11.6 6.20 31.4 0.085 0.051 0.026 < 0.013 0.623 0.856 14 12.7 5077.6 12.2 6.31 29.7 0.066 0.065 0.025 < 0.013 0.946 1.334 15 13.2 5077.1 12.8 6.17 31.5 0.066 0.057 0.020 0.011 0.512 0.561 16 11.6 5078.8 13.1 6.15 30.9 0.058 0.375 < 0.020 < 0.063 5.344 5.626 17 9.3 5081.0 11.7 6.16 30.3 0.063 0.163 0.021 < 0.020 2.943 3.066 18 13.8 5076.5 12.8 6.08 34.1 0.064 0.163 0.020 < 0.013 0.717 0.739 19 10.4 5079.9 12.0 6.05 32.3 0.063 0.125 < 0.020 < 0.015 1.920 1.938 Maximum 13.8 5081.0 13.1 6.31 34.1 1.20 0.085 0.375 0.026 0.063 5.344 5.626 Minimum 9.3 5076.5 11.5 6.05 29.7 1.20 0.054 0.051 0.020 0.010 0.512 0.561 Average 11.5 5078.8 12.2 6.15 31.7 1.20 0.065 0.134 0.022 0.020 1.690 1.840 #Tests 8 8 8 8 8 0 1 8 8 8 8 8 8 Site: ACMW-20 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 67 78 1.32 2.20 1 < 1 13 70 78 1.62 2.42 1 < 1 14 66 77 1.65 2.27 1 < 1 15 67 85 2.02 2.96 32 < 1 16 107 130 2.65 3.72 6 < 1 17 97 108 3.03 4.61 10 < 1 18 74 87 1.77 2.96 < 1 < 1 19 78 99 2.93 2.70 25 < 1 Maximum 107 130 3.03 4.61 32 1 Minimum 66 77 1.32 2.20 1 < 1 Average 78 93 2.12 2.98 10 1 #Tests 8 8 8 0 8 0 8 8 0 Site ACMW-20 Nitrate-Nitrogen & Water Level Chlorides 20 5088 50 16 5084 40 ---------- - _ - 12 5080 d 30 -- J y J J m E 8 - - 5076 0 E 20 3 4 5072 10 - - 0 5068 0 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 t Nitrate +Water Level Linear(Nitrate) -- -Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 - 0.50 400 0.40 300 -- 0.30 - J J O> E E 200 0.20 100 -- - - - - 0.10 0 0.00 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 t TDS Total P Annual Metal Report ACM W-20 Diamond Valley Rd - Paynesville Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI v Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/20/2012 8.73 2.27 1.87 5.05 <10 62.3 <1 21.7 <1 <0.5 <1 <20 123 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/11/2013 5.50 1.83 1.22 3.84 7/8/2014 6.55 2.04 1.62 4.34 <0.5 103 1.54 19.9 <1 <0.5 <1 2.32 502 <0.2 3.41 <2 <5 <0.5 <1 <5 <1 <3 <20 8/18/2015 8.28 2.5 2.11 5.25 <0.5 61.6 <1 22.4 <3 <0.5 <1 <2 91.6 <0.2 <2 2.11 <5 <0.5 <3 <5 <1 <3 <20 7/27/2016 8.20 2.21 2.04 5.24 <0.5 41.6 <1 20.9 <1 <0.5 <1 <2 33.7 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2017 5.85 1.58 1.32 4.70 <0.5 466 <1 18.4 <1 <0.5 <1 <2 488 <0.2 3.59 1.96 <5 <0.5 <1 <5 <1 3.3 <20 8/29/2018 7.61 1.94 1.87 5.19 <0.5 68.8 <1 21.9 <1 <0.5 <1 <2 65.6 <0.2 <2 1.99 <5 <0.5 <1 <5. <1 <3 <20 8/14/2019 5.94 1.74 1.38 4.73 <0.5 568 <1 18.8 <1 <0.5 <1 1.96 565 <0.2 4.08 2.27 <5 0.537 <1 <5 <1 3.8 <20 Site: ACMW-21 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 03/07/2019 17.30 4994.03 9.5 6.16 34.2 0.062 0.230 < 0.020 < 0.010 3.88 4.11 04/25/2019 13.20 4998.13 9.2 6.36 29.6 0.064 < 0.050 < 0.020 < 0.010 1.42 1.43 07/18/2019 6.61 5004.72 10.5 6.16 34.9 0.068 < 0.080 < 0.020 < 0.010 0.607 0.615 10/30/2019 12.54 4998.79 10.4 5.98 37.4 0.059 < 0.100 < 0.020 < 0.010 5.95 5.78 Maximum 17.30 5004.72 10.5 6.36 37.4 0.068 0.230 < 0.020 < 0.010 5.95 5.78 Minimum 6.61 4994.03 9.2 5.98 29.6 0.059 < 0.050 < 0.020 < 0.010 0.607 0.615 Average 12.41 4998.92 9.9 6.17 34.0 0.063 0.115 < 0.020 < 0.010 2.96 2.98 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-21 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/07/2019 102 138 9.64 4.68 < 1 < 1 04/25/2019 78 93 5.00 4.11 4.1 < 1 07/18/2019 75 111 9.46 2.79 10.9 < 1 10/30/2019 163 246 31.0 6.85 18.5 < 1 Maximum 163 246 31.0 6.85 18.5 < 1 Minimum 75 93 5.00 2.79 < 1 < 1 Average 105 147 13.8 4.61 8.6 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-21 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 13.4 4997.9 10.4 6.13 37.4 2.3 0.031 0.113 0.024 < 0.022 2.065 2.201 13 14.9 4997.0 10.1 6.29 34.2 0.047 0.099 0.025 < 0.016 1.003 1.124 14 13.3 4998.0 9.2 6.45 38.1 0.042 0.124 0.021 < 0.013 1.033 1.491 15 17.7 4993.6 10.1 6.30 41.5 0.053 0.081 < 0.020 0.018 1.320 1.391 16 13.7 4997.6 10.9 6.29 38.1 0.063 < 0.063 < 0.020 < 0.015 0.865 0.860 17 9.9 5001.4 10.6 6.14 39.6 0.066 0.094 0.021 < 0.015 2.283 2.276 18 12.8 4998.5 10.7 5.97 36.2 0.062 0.215 0.020 < 0.015 2.970 2.276 19 12.4 4998.9 9.9 6.17 34.0 0.063 0.115 < 0.020 < 0.010 2.964 2.984 Maximum 17.7 5001.4 10.9 6.45 41.5 2.3 0.066 0.215 0.025 0.022 2.970 2.984 Minimum 9.9 4993.6 9.2 5.97 34.0 2.3 0.031 0.063 < 0.020 < 0.010 0.865 0.860 Average 13.5 4997.9 10.2 6.22 37.4 2.3 0.053 0.113 0.021 0.016 1.813 1.825 #Tests 8 8 8 8 8 0 1 8 8 8 8 8 8 Site: ACMW-21 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 99 143 12.1 5.76 6 < 1 13 83 114 8.2 4.16 1 < 1 14 84 119 7.6 4.06 1 < 1 15 96 135 7.4 4.94 < 1 < 1 16 83 113 5.9 3.88 < 1 < 1 17 110 156 13.9 4.01 2 1 18 117 169 17.2 4.31 8 1 19 105 147 13.8 4.61 9 < 1 Maximum 117 169 17.2 5.76 9 1 Minimum 83 113 5.9 3.88 1 < 1 Average 97 137 10.8 4.47 4 1 #Tests 8 8 8 0 8 0 8 8 0 Site ACMW-21 Nitrate-Nitrogen & Water Level Chlorides 10 - - 5002 50 8 5000 40 4998 4= 6 d 30 E 499672 rn 4 E A 20 -- 4994 3 2 10 4992 0 4990 p 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 --a-Nitrate t Water Level Linear(Nitrate) t Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 0.50 400 0.40 -------- - — 300 -- 0.30 J � J E 200 E 0.20 100 - 0.10 0 0.00 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 t TDS t-Total P Annual Metal Report ACMW-21 River Ranch Rd Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI v Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/20/2012 5.69 1.57 1.5 11.9 <10 110 <1 20 <1 <0.5 <1 <20 89.4 <0.2 <20 3.08 <5 <2.5 <1 <5 <1 <3 <10 6/11/2013 4.91 1.32 1.23 8.66 7/8/2014 7.09 1.57 1.98 10.1 <0.5 22.1 <1 19.4 <1 <0.5 <1 <2 29.8 <0.2 <2 3.97 <5 <0.5 <1 <5 <1 <3 <20 8/18/2015 12.5 2.14 3.53 14.7 <0.5 <20 <1 37.3 <3 <0.5 <1 <2 <20 <0.2 <2 2.91 <5 <0.5 <1 <5 <3 <3 <20 7/27/2016 7.78 1.84 2.20 12.3 <0.S S5 <1 23.4 <1 <0.S <1 <2 27.3 <2 2.95 <5 <0.S <1 <5 <1 <3 <20 8/16/2017 8.55 2.02 2.31 12.6 <0.5 <20 <1 26.3 <1 <0.5 <1 <2 <20 <0.2 <2 2.78 <5 <0.5 <1 <5 <3 <3 <20 8/14/2018 13.8 2.26 3.60 14.0 <0.5 <20 <1 39 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <S <0.5 <1 <5 <3 <3 <20 7/18/2019 8.73 1.79 2.27 10.1 <0.5 <20 <1 27.2 <1 <0.5 <1 2.39 <20 <0.2 <2 2.64 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-22 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NOz-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 03/07/2019 29.62 4989.66 11.5 6.10 35.8 0.014 0.130 < 0.020 < 0.010 2.50 2.63 04/25/2019 25.88 4993.40 12.0 6.16 37.1 0.018 < 0.050 < 0.020 < 0.010 2.55 2.58 07/18/2019 23.19 4996.09 12.4 6.17 37.6 0.019 < 0.080 < 0.020 < 0.010 2.73 2.64 10/30/2019 29.05 4990.23 11.0 6.12 37.1 0.018 < 0.100 < 0.020 < 0.010 2.66 2.50 Maximum 29.62 4996.09 12.4 6.17 37.6 0.019 0.130 < 0.020 < 0.010 2.73 2.64 Minimum 23.19 4989.66 11.0 6.10 35.8 0.014 < 0.050 < 0.020 < 0.010 2.50 2.50 Average 26.94 4992.35 11.7 6.14 36.9 0.017 0.090 < 0.020 < 0.010 2.61 2.59 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-22 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/07/2019 87 109 4.48 2.07 < 1 < 1 04/25/2019 99 110 4.27 2.41 < 1 < 1 07/18/2019 84 115 3.65 2.23 < 1 < 1 10/30/2019 85 118 2.93 2.58 < 1 < 1 Maximum 99 118 4.48 2.58 < 1 < 1 Minimum 84 109 2.93 2.07 < 1 < 1 Average 89 113 3.83 2.32 < 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-22 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 30.5 4988.8 10.1 6.28 31.2 2.6 0.026 0.057 0.028 < 0.010 0.58 0.646 13 32.5 4986.7 10.9 6.18 34.0 0.062 0.057 0.027 < 0.019 1.61 1.365 14 32.6 4986.7 11.9 6.24 36.7 0.017 0.102 0.023 < 0.019 2.02 2.053 15 33.3 4986.0 11.8 6.15 37.4 0.017 0.072 < 0.020 < 0.020 2.36 2.413 16 30.0 4989.3 13.1 6.14 38.8 0.017 0.128 < 0.020 < 0.025 2.62 2.650 17 22.7 4996.6 12.6 5.94 37.0 0.021 0.094 < 0.020 < 0.033 2.79 2.775 18 27.2 4992.1 12.3 5.93 34.2 0.020 0.103 < 0.020 < 0.015 2.33 2.378 19 26.9 4992.3 11.7 6.14 36.9 0.017 0.090 < 0.020 < 0.010 2.61 2.588 Maximum 33.3 4996.6 13.1 6.28 38.8 2.6 0.062 0.128 0.028 0.033 2.79 2.775 Minimum 22.7 4986.0 10.1 5.93 31.2 2.6 0.017 0.057 0.020 0.010 0.58 0.646 Average 29.5 4989.8 11.8 6.13 35.8 2.6 0.025 0.088 0.022 0.019 2.11 2.108 #Tests 8 8 8 8 8 0 1 8 8 8 8 8 8 Site: ACMW-22 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 63 73 1.12 4.10 < 1 < 1 13 75 94 2.86 1.81 < 1 < 1 14 81 106 3.89 1.72 1 < 1 15 84 118 4.15 1.68 4 < 1 16 86 118 3.79 1.77 1 < 1 17 90 110 2.56 2.02 45 < 1 18 84 109 3.81 2.12 44 < 1 19 89 113 3.83 2.32 < 1 < 1 Maximum 90 118 4.15 4.10 45 1 Minimum 63 73 1.12 1.68 < 1 < 1 Average 82 105 3.25 2.19 12 1 #Tests 8 8 8 0 8 0 8 8 0 Site ACMW-22 Nitrate-Nitrogen &Water Level Chlorides 10 5000 50 8 OLIN 4995 40 x 6 4990 m 30 J d J O) J E E 4 -- 4985 20 - 3 2 4980 10 0 4975 0 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 t Nitrate t Water Level Linear(Nitrate) -t-Chloride Total Dissolved Solids(TDS) Total Phosphorus 500 0.50 400 0.40 -- -- 300 0.30 E E 200 0.20 --- — - 100 0.10 0 0.00 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 +TDS —Total P Annual Metal Report ACMW-22 Fredericksburg Ln Ca K Mg Na Ag AI As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/20/2012 7.28 2.06 1.6 4.13 <10 127 <1 16.9 <1 <0.5 <1 <20 127 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/11/2013 8.95 2.34 1.57 4.66 7/8/2014 10.9 2.57 2.49 5.43 <0.5 <20 <1 27.2 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/18/2015 10.6 2.33 2.49 5.11 <0.5 <20 <1 26.6 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/27/2016 11.3 2.64 2.66 5.60 <0.5 <20 <1 26.4 <1 <0.5 <1 <2 <20 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2017 9.64 2.32 2.20 4.96 <0.5 <20 <1 23.6 <3 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/14/2018 10.4 2.21 2.30 5.18 <0.5 <20 <1 23.5 <3 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/18/2019 12.3 2.68 2.82 5.82 <0.5 444 <1 34.7 <3 <0.5 <1 <2 0.366 <0.2 11.6 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-23 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 03/20/19 17.29 4961.06 13.9 7.09 172 0.030 < 0.100 < 0.020 < 0.010 0.881 0.923 04/25/19 18.41 4959.94 14.8 7.19 172 0.032 < 0.050 < 0.020 < 0.010 1.03 0.988 07/18/19 4.50 4973.85 14.8 7.34 170 0.037 < 0.080 < 0.020 < 0.010 1.01 0.899 10/30/19 18.72 4959.63 14.8 7.23 173 0.046 < 0.100 < 0.020 < 0.010 1.08 1.04 Maximum 18.72 4973.85 14.8 7.34 173 0.046 < 0.100 < 0.020 < 0.010 1.08 1.04 Minimum ' 4.50 4959.63 13.9 7.09 170 0.030 < 0.050 < 0.020 < 0.010 0.881 0.899 Average 14.73 4963.62 14.6 7.21 172 0.036 < 0.083 < 0.020 < 0.010 1.00 0.963 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-23 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/20/19 265 392 3.58 19.0 < 1 < 1 04/25/19 272 369 4.06 19.5 < 1 < 1 07/18/19 260 378 3.93 20.0 < 1 < 1 10/30/19 265 384 3.97 21.0 < 1 < 1 Maximum 272 392 4.06 21.0 < 1 < 1 Minimum 260 369 3.58 19.0 < 1 < 1 Average 266 381 3.89 19.9 < 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-23 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NOZ-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L m /L mg/L mg/L mg/L mg/L 12 18.6 4959.7 15.1 7.39 177 16 0.250 0.068 0.026 < 0.014 1.06 1.142 13 18.9 4959.5 14.9 7.31 175 0.152 0.091 0.024 < 0.013 1.04 1.079 14 19.0 4959.4 15.6 7.34 175 0.100 0.062 0.026 < 0.010 1.00 1.010 15 21.8 4956.6 15.0 7.35 174 0.033 0.054 < 0.020 < 0.010 1.02 1.050 16 17.0 4961.3 15.6 7.29 173 0.031 < 0.063 < 0.020 < 0.010 1.02 0.976 17 17.5 4960.8 15.4 7.32 173 0.043 < 0.092 0.021 < 0.017 1.03 0.991 18 18.2 4960.1 15.7 7.09 172 0.042 < 0.063 0.020 < 0.010 1.03 1.035 19 14.7 4963.6 14.6 7.21 172 0.036 < 0.083 < 0.020 < 0.010 1.00 0.963 Maximum 21.8 4963.6 15.7 7.39 177 16 0.250 0.092 0.026 < 0.017 1.06 1.142 Minimum 14.7 4956.6 14.6 7.09 172 16 0.031 0.054 0.020 < 0.010 1.00 0.963 Average 18.2 4960.1 15.2 7.29 174 16 0.086 0.072 0.022 < 0.012 1.02 1.031 #Tests 8 8 8 8 8 0 1 8 8 8 8 8 8 Site: ACMW-23 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 269 378 4.22 17.8 1 < 1 13 271 379 4.15 19.7 1 < 1 14 271 379 4.23 19.8 1 < 1 15 273 384 4.14 19.2 9 < 1 16 266 373 4.22 19.8 1 < 1 17 262 370 4.33 19.3 < 1 < 1 18 267 376 4.05 19.2 < 1 < 1 19 266 381 3.89 19.9 < 1 < 1 Maximum 273 384 4.33 19.9 9 1 Minimum 262 370 3.89 17.8 1 < 1 Average 268 378 4.15 19.3 2 < 1 #Tests 8 8 8 0 8 0 8 8 0 Site ACMW-23 Nitrate-Nitrogen &Water Level Chlorides 10 4970 50 8 4965 40 x 6 4960 d 30 J Q J � J � E E 4 4955 20 2 4950 10 0 4945 0 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 t Nitrate t Water Level —0—Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 0.50 400 0.40 300 0.30 J J m Ol E E 200 0.20 100 0.10 0 0.00 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 t TDS t Total P Annual Metal Report ACM W-23 Scott Brooke's Ranch by Irrigation Ditch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb. Se TI V. Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/20/2012 31.4 4.47 12.6 33.1 <10 582 2.58 90.4 <1 <0.5 1.16 <20 1020 <0.2 <20 2.4 <5 <2.5 <1 <5 <1 13 <10 6/11/2013 30.0 5.38 13.2 32.2 7/8/2014 33.8 6.79 17.3 31.8 <5 6630 <10 122 <10 <5 <10 20.2 12700 <0.2 220 <20 <50 <5 <10 <50 <10 38.6 <200 8/18/2015 32.7 4.70 13.2 29.3 <0.5 2430 3.54 107 <1 <0.5 3.66 15.2 4990 <0.2 99.3 2.54 <5 0.83 <1 <5 <1 22.4 <20 7/27/2016 30.5 4.63 14.0 31.5 <0.5 1670 2.68 110 <1 <0.5 3.47 7.54 3610 59.6 2.04 <5 <0.5 <1 <5 <1 16.4 <20 8/16/2017 31.3 4.44 13.4 31.0 <0.5 2080 3.41 119 <1 <0.5 4.39 9.37 3810 <0.2 74.4 2.28 <5 <0.5 <1 <5 <1 19.5 <20 8/14/2018 32.6 4.27 13.6 32.3 <0.5 832 4.86 101 <1 <0.5 1.2 11.6 1810 <0.2 33.2 2.27 <5 <0.5 <1 <5 <1 15.2 <20 7/18/2019 31.8 4.45 13.5 32.4 <0.5 1060 2.58 122 <1 <0.5 1.86 11.4 2.12 <0.2 37.1 2.22 <5 <0.5 <1 <5 <1 24.9 <20 Site: ACMW-24 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO,-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 03/20/2019 No Access 04/25/2019 20.12 4933.13 13.4 6.34 180 0.070 < 0.050 < 0.020 < 0.010 2.58 2.61 07/18/2019 24.00 4929.25 12.8 6.48 191 0.083 < 0.080 < 0.020 < 0.010 1.92 1.95 10/30/2019 25.78 4927.47 12.1 6.53 181 0.079 < 0.100 < 0.020 < 0.010 1.96 1.93 Maximum 25.78 4933.13 13.4 6.53 191 0.083 < 0.100 < 0.020 < 0.010 2.58 2.61 Minimum 20.12 4927.47 12.1 6.34 180 0.070 < 0.050 < 0.020 < 0.010 1.92 1.93 Average 23.30 4929.95 12.8 6.45 184 0.077 < 0.077 < 0.020 < 0.010 2.15 2.16 #Tests 3 3 3 3 3 0 0 3 3 3 3 3 3 Site: ACMW-24 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/20/2019 04/25/2019 406 625 68.5 36.6 < 1 < 1 07/18/2019 432 707 79.1 43.1 < 1 < 1 10/30/2019 368 626 54.9 40.4 46.4 < 1 Maximum 432 707 79.1 43.1 46.4 < 1 Minimum 368 625 54.9 36.6 < 1 < 1 Average 402 653 67.5 40.0 16.1 < 1 #Tests 3 3 3 0 3 0 3 3 0 Site: ACMW-24 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 24.4 4928.9 13.0 6.64 168 12 0.268 0.166 0.028 0.025 2.11 2.298 13 25.4 4927.9 13.5 6.59 165 0.127 0.124 0.024 < 0.019 2.09 2.171 14 25.2 4928.0 13.9 6.62 162 0.200 0.128 0.025 < 0.018 2.18 2.283 15 25.3 4927.9 13.7 6.58 155 0.080 0.079 < 0.020 0.018 1.91 1.975 16 24.5 4928.7 13.9 6.49 160 0.076 0.145 < 0.020 < 0.020 1.63 1.745 17 23.3 4930.0 13.6 6.55 169 0.073 < 0.095 < 0.020 < 0.020 1.84 1.873 18 24.8 4928.5 14.0 6.38 172 0.072 < 0.125 < 0.020 < 0.013 1.62 1.710 19 23.3 4930.0 12.8 6.45 184 0.077 < 0.077 < 0.020 < 0.010 2.15 2.163 Maximum 25.4 4930.0 14.0 6.64 184 12 0.268 0.166 0.028 0.025 2.18 2.298 Minimum 23.3 4927.9 12.8 6.38 155 12 0.072 0.077 0.020 0.010 1.62 1.710 Average 24.5 4928.7 13.5 6.54 167 12 0.122 0.117 0.022 0.018 1.94 2.027 #Tests 8 8 8 8 8 0 1 8 8 8 8 8 8 Site: ACMW-24 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coll E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 334 523 39.1 38.4 2 < 1 13 342 535 46.6 31.3 1 < 1 14 352 552 55.1 28.8 < 1 < 1 15 345 531 49.1 31.1 < 1 < 1 16 354 563 62.9 26.8 < 1 < 1 17 427 674 88.5 32.8 3 3 18 384 641 64.4 36.2 < 1 < 1 19 402 653 67.5 40.0 16 < 1 Maximum 427 674 88.5 40.0 16 3 Minimum 334 523 39.1 26.8 1 1 Average 367 584 59.1 33.2 3 1 #Tests 8 8 8 0 8 0 8 8 0 Site ACMW-24 Nitrate-Nitrogen & Water Level Chlorides 10 100 4938 4933 90 8 4928 80 4923 4918 70 6 60 4913 m O1 4908 m o> E 50E 4 4903 3 40 - 4898 30 2 4893 4888 20 4883 10 - 0 4878 0 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 —�Nitrate t Water Level Linear(Nitrate) Chloride Total Total Dissolved Solids (TDS) Total Phosphorus 500 0.50 400 0.40 300 0.30 J J m E E 200 0.20 100 0.10 - - - 0 0.00 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 —�—TDS -- Total P Annual Metal Report ACM W-24 Scott Brooke's Ranch by Irrigation Ditch Ca K Mg Na Ag AI As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/20/2012 46.1 4.04 19 39.4 <10 719 2.32 121 <1 <0.5 <1 <20 874 <0.2 89 <2 <5 <2.5 <1 <5 <1 10.6 <10 6/11/2013 43.8 3.64 18.4 37.9 7/8/2014 52.0 5.12 26.0 42.3 <1 4200 6.38 264 <2 <1 4.52 6.02 4760 <0.2 181 <4 <10 1.3 <2 <10 <2 23.9 <40 8/18/2015 44.2 3.39 19.1 38.0 <0.5 40.4 1.46 190 <2 <0.5 <1 <2 180 <0.2 4.56 <2 <5 <0.5 <1 <5 <1 8.77 <20 7/27/2016 47.6 4.34 21.9 45.2 <0.5 1420 2.09 208 <2 <0.5 11.3 3.2 1940 67.9 <2 <5 <0.5 <1 <5 <1 13.8 <20 8/16/2017 52.7 4.10 23.5 44.8 <0.5 2110 2.58 228 <1 <0.5 2.3 3.39 2590 <0.2 82.5 <2 <5 0.559 <1 <5 <1 15.7 <20 8/14/2018 49.6 3.36 21.8 46.2 <0.5 202 3.66 218 <1 <0.5 <1 18 256 <0.2 6.82 <2 <5 <0.5 <1 <5 <1 10.5 <20 7/18/2019 58.4 3.89 25.5 49.7 <0.5 204 1.24 260 <1 <0.5 <1 8.5 0.242 <0.2 9.28 <2 <5 <0.5 <1 <5 <1 9.24 <20 Site: ACMW-25 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 03/07/2019 6.47 4935.77 9.5 6.27 38.6 0.035 < 0.070 < 0.020 < 0.010 8.16 7.00 04/25/2019 8.30 4933.94 10.8 6.24 42.2 0.036 0.20 < 0.020 < 0.010 6.55 6.75 07/18/2019 7.97 4934.27 14.7 6.38 53.3 0.049 < 0.080 < 0.020 < 0.010 2.77 2.84 10/30/2019 9.21 4933.03 14.6 6.26 48.2 0.055 < 0.100 < 0.020 < 0.010 2.77 2.62 Maximum 9.21 4935.77 14.7 6.38 53.3 0.055 0.20 < 0.020 < 0.010 8.16 7.00 Minimum 6.47 4933.03 9.5 6.24 38.6 0.035 < 0.070 < 0.020 < 0.010 2.77 2.62 Average 7.99 4934.25 12.4 6.29 45.6 0.044 0.113 < 0.020 < 0.010 5.06 4.80 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-25 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/07/2019 165 228 18.5 8.51 2.0 < 1 04/25/2019 150 200 13.8 8.70 < 1 < 1 07/18/2019 115 168 8.96 6.53 2.0 < 1 10/30/2019 125 173 10.5 6.34 152 < 1 Maximum 165 228 18.5 8.70 152 < 1 Minimum 115 168 8.96 6.34 < 1 < 1 Average 139 192 12.94 7.52 39.3 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-25 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 8.7 4933.5 13.8 6.41 47.7 0.38 0.049 0.137 0.025 < 0.040 3.13 3.303 13 8.8 4933.4 13.4 6.30 47.8 0.078 0.053 0.026 0.025 1.98 2.056 14 9.5 4932.8 13.2 6.38 46.7 0.053 0.124 0.023 < 0.018 1.68 1.897 15 9.8 4932.4 14.0 6.32 44.3 0.047 0.073 < 0.020 < 0.018 1.50 1.553 16 8.7 4933.5 14.0 6.27 45.1 0.043 0.235 < 0.020 < 0.020 3.59 3.828 17 7.2 4935.1 13.4 6.34 48.2 0.048 0.161 < 0.020 < 0.028 3.14 3.280 18 9.0 4933.2 14.5 6.09 48.9 0.051 0.123 < 0.020 < 0.015 2.68 2.748 19 8.0 4934.3 12.4 6.29 45.6 0.044 0.113 < 0.020 < 0.010 5.06 4.803 Maximum 9.8 4935.1 14.5 6.41 48.9 0.38 0.078 0.235 0.026 0.040 5.06 4.803 Minimum 7.2 4932.4 12.4 6.09 44.3 0.38 0.043 0.053 < 0.020 < 0.010 1.50 1.553 Average 8.7 4933.5 13.6 6.30 46.8 0.38 0.052 0.127 0.022 0.022 2.84 2.933 #Tests 8 8 8 8 8 0 1 8 8 8 8 8 8 Site: ACMW-25 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coll E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 125 163 9.0 6.46 3 < 1 13 121 159 10.1 6.51 1 < 1 14 119 158 10.9 7.23 2 < 1 15 111 150 9.6 5.54 < 1 < 1 16 124 182 12.5 6.26 2 2 17 134 179 10.9 8.10 19 < 1 18 120 164 8.0 5.71 39 < 1 19 139 192 12.9 7.52 39 < 1 Maximum 139 192 12.9 8.10 39 2 Minimum 111 150 8.0 5.54 1 1 Average 124 168 10.5 6.67 13 1 #Tests 8 8 8 8 0 8 8 0 Site ACMW-25 Nitrate-Nitrogen &Water Level Chlorides 10 - 4950 50 8 4945 40 — 6 - 4940 30 a J J � � E 4 4935 ; 20 2 a93o 10 0 1 4925 0 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 —�Nitrate t Water Level Linear(Nitrate) t Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 -- — 0.50 400 - 0.40 300 _ _ 0.30 J J E 200 - E 0.20 100 0.10 0 0.00 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 t TDS Total P Annual Metal Report ACMW-25 Access Rd. between Neddenriep & Brooke Ca K Mg Na Ag AI As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L. ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/20/2012 14.0 3.46 4.24 12 <10 <20 <1 43.2 <1 <0.5 <1 <20 66.4 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/11/2013 12.4 3.44 3.79 10.8 7/8/2014 13.6 3.26 4.63 11.9 <0.5 <20 <1 40.5 <1 <0.5 <1 2.36 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 3.02 <20 8/18/2015 10.5 2.91 3.72 10.6 <0.5 28.1 <1 33.0 <1 <0.5 <1 <2 20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/27/2016 12.9 3.38 4.47 12.1 <0.5 <20 <1 39.6 <1 <0.5 <1 <2 <20 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2017 13.5 3.30 4.50 11.7 <0.5 <20 <1 42.6 <1 <0.5 1.3 <2 220 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/14/2028 13.1 3.23 4.26 12.5 <0.5 <20 <1 38.9 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/18/2019 13.5 3.16 4.42 12.2 <0.5 <20 <1 50.0 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 3.24 <20 Site: ACMW-26 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 03/07/19 8.63 4886.97 4.6 6.33 35.2 0.075 0.540 < 0.020 < 0.020 1.43 1.97 04/25/19 6.22 4889.38 9.5 6.32 49.0 0.089 0.321 < 0.020 0.014 0.246 0.581 07/18/19 7.62 4887.98 16.0 6.41 78.8 0.133 0.360 < 0.020 0.010 0.104 0.474 10/30/19 13.11 4882.49 14.0 6.25 68.4 0.121 0.158 < 0.020 0.044 0.473 0.675 Maximum 13.11 4889.38 16.0 6.41 78.8 0.133 0.540 < 0.020 0.044 1.43 1.97 Minimum 6.22 4882.49 4.6 6.25 35.2 0.075 0.158 < 0.020 0.010 0.104 0.474 Average 8.90 4886.71 11.0 6.33 57.9 0.105 0.345 < 0.020 0.022 0.563 0.925 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-26 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/07/19 144 199 25.9 11.7 112.6 2.0 04/25/19 132 183 22.2 6.33 66.9 < 1 07/18/19 145 209 15.0 2.57 41.3 6.3 10/30/19 142 221 20.2 6.66 1.0 < 1 Maximum 145 221 25.9 11.7 112.6 6.3 Minimum 132 183 15.0 2.57 1.0 < 1 Average 141 203 20.8 6.82 55.5 2.6 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-26 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 11.4 4884.2 12.4 6.36 62.6 1.00 0.095 0.153 0.023 0.031 1.296 1.481 13 12.7 4882.9 13.4 6.38 65.4 0.107 0.229 0.026 0.026 1.411 2.087 14 13.8 4881.8 13.0 6.46 60.7 0.101 0.160 0.023 0.033 1.777 1.983 15 14.1 4881.5 12.0 6.36 57.4 0.079 0.146 < 0.020 0.020 3.533 3.675 16 12.4 4883.2 13.8 6.44 62.6 0.146 0.270 < 0.020 0.032 1.768 2.058 17 7.8 4887.8 12.8 6.60 74.1 0.205 0.547 0.048 < 0.015 0.420 0.957 18 11.3 4884.3 14.1 6.19 67.4 0.112 0.176 0.024 < 0.036 0.503 0.682 19 8.9 4886.7 11.0 6.33 57.9 0.105 0.345 < 0.020 0.022 0.563 0.925 Maximum 14.1 4887.8 14.1 6.60 74.1 1.00 0.205 0.547 0.048 0.036 3.533 3.675 Minimum 7.8 -4881.5 11.0 6.19 57.4 1.00 0.079 0.146 0.020 0.015 0.420 0.682 Average 11.6 4884.0 12.8 6.39 63.5 1.00 0.119 0.253 0.025 0.027 1.409 1.731 #Tests 8 8 8 8 8 0 1 8 8 8 8 8 8 Site: ACMW-26 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1989 To: 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 137 200 16.3 6.66 7 6 13 149 219 17.0 7.94 6 3 14 150 227 21.3 8.42 7 3 15 164 254 24.1 10.65 4 1 16 160 240 19.0 15.17 32 3 17 160 225 19.5 4.96 179 7 18 139 209 16.3 6.10 6 1 19 141 203 20.8 6.82 55 3 Maximum 164 254 24.1 15.17 179 7 Minimum 137 200 16.3 4.96 4 1 Average 150 222 19.3 8.34 37 3 #Tests 8 8 8 0 8 0 8 8 0 Site ACMW-26 Nitrate-Nitrogen &Water Level Chlorides 10 -------- 4895 50 8 4890 40 6 - 4885 ; 30 & J E ° a 4 - 4880 � E 20 2 - _ 4875 10 0 4870 0 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 �—Nitrate ----Water Level Linear(Nitrate) �—Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 0.50 400 0.40 -- -- -- 300 0.30 -- - J E E 200 0.20 -- — 100 0.10 — - 0 0.00 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 t TDS —e­Total P Annual Metal Report ACMW-26 Access Rd. between Neddenriep& Brooke Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/20/2012 16.1 4.14 4.31 '20.6 <10 54.2 <1 47.9 <1 <0.5 <1 <20 54 <0.2 25.9 <2 <5 <2.5 <1 <5 <1 3.16 <10 6/11/2016 12.8 4.25 3.43 19.3 7/8/2014 19.5 5.42 5.57 27.3 <0.5 <20 <1 58.0 <1 <0.5 <1 4.72 26.6 <0.2 80 1.99 <5 <0.5 <1 <5 <1 4.2 <20 8/18/2015 14.0 4.03 4.28 20.3 <0.5 24.6 <1 51.2 <1 <0.5 <1 <2 24.8 <0.2 20.7 <2 <5 <0.5 <1 <5 <1 <3 <20 7/27/2016 15.0 5.76 4.51 21.0 <0.5 <20 <1 44.7 <1 <0.5 <1 3.27 <20 89.4 3.85 <5 <0.5 <1 <5 <1 5.03 <20 8/16/2017 19.4 6.70 5.49 23.9 <0.5 27.9 1.24 69.3 <1 <0.5 <1 2.35 39.9 <0.2 113 2.87 <5 <0.5 <1 <5 <1 12.6 <20 8/14/2018 11.9 4.15 3.52 18.2 <0.5 <20 <1 39.5 <1 <0.5 <1 2.73 21.5 <0.2 213 3.32 <5 <0.5 <1 <5 <1 3.03 <20 7/18/2019 14.3 6.33 4.12 21.0 <0.5 <20 <1 60.0 <1 <0.5 <1 4.05 48.9 <0.2 128 3.12 <5 <0.5 <1 <5 <1 5.28 <20 DIAMOND VALLEY RANCH MONITORING WELLS Site: ACMW-08N SOUTH TAHOE PUBLIC UTILITY DISTRICT _PINE COUNTY GROUNDWATER QUALITY DAl 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 01/23/19 3.88 5460.57 12.9 6.59 78.3 0.041 0.089 < 0.020 < 0.020 0.593 0.682 116 05/22/19 2.50 5461.95 9.9 6.85 82.3 0.038 0.064 < 0.020 < 0.010 0.603 0.667 119 08/14/19 3.18 5461.27 13.1 6.91 82.5 0.038 < 0.100 < 0.020 < 0.010 0.707 0.568 132 11121/19 4.39 5460.06 11.5 6.66 83.4 0.037 < 0.050 < 0.020 < 0.010 0.666 0.611 117 Maximum 4.39 5461.95 13.1 6.91 83.4 0.041 0.100 < 0.020 < 0.020 0.707 0.682 132 Minimum 2.50 5460.06 9.9 6.59 78.3 0.037 < 0.050 < 0.020 < 0.010 0.593 0.568 116 Average 3.49 5460.96 11.9 6.75 81.6 0.039 0.076 < 0.020 < 0.013 0.642 0.632 121 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-08N SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Coll E. coli Fecal EC Chloride COD SO4 Color Chromo Chromo Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 01/23/19 161 1.74 1.32 13.5 < 1 05/22/19 134 1.63 1.27 < 1 < 1 08/14/19 171 0.99 0.93 34.1 21.3 11/21/19 172 1.32 1.02 < 1 < 1 Maximum 172 1.74 1.32 34 21.3 Minimum 134 0.99 0.93 < 1 < 1 Average 160 1.42 1.13 12.4 6.1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-08N SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2009 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 09 4.3 5460.2 11.7 6.50 62 53 0.22 0.040 < 0.050 < 0.010 0.361 0.391 10 4.1 5460.3 12.4 6.62 68 0.042 0.127 < 0.010 0.450 0.536 11 4.7 5459.8 12.0 6.90 80 0.04 0.040 < 0.058 < 0.010 0.626 0.693 12 5.7 5458.7 12.0 7.02 81 0.08 0.044 < 0.055 < 0.020 < 0.010 0.744 0.808 13 6.3 5458.2 12.2 6.90 83 0.052 < 0.050 0.022 < 0.010 0.689 0.701 14 6.3 5458.2 12.0 6.98 79 0.039 0.074 0.025 < 0.010 0.672 0.679 15 7.9 5456.6 12.2 6.81 78 0.045 < 0.050 < 0.020 < 0.010 0.643 0.630 16 5.6 5458.9 12.5 6.72 76 0.044 0.067 < 0.020 < 0.010 0.595 0.589 17 3.0 5461.4 12.1 6.97 83 0.046 < 0.073 < 0.020 < 0.010 0.676 0.592 18 4.6 5459.9 12.4 6.75 84 0.041 < 0.296 < 0.020 < 0.200 0.691 0.799 19 3.5 5461.0 11.9 6.75 82 0.039 0.076 < 0.020 < 0.013 0.642 0.632 Maximum 7.9 5461.4 12.5 7.02 84 53 0.22 0.052 0.296 0.025 < 0.200 0.744 0.808 Minimum 3.0 5456.6 11.7 6.50 62 53 0.04 0.039 0.050 0.020 < 0.010 0.361 0.391 Average 5.1 5459.4 12.1 6.81 78 53 0.11 0.043 0.089 0.021 < 0.027 0.617 0.641 #Tests 11 11 11 11 11 1 3 11 11 8 11 11 11 Site: ACMW-08N SOUTH TAHOE PUBLIC UTILITY DISTRICT ,PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2019 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 09 106 142 5.46 6 1.00 3.5 < 1 First year of sampling 10 110 170 3.35 1.25 2.5 < 1 11 120 164 0.77 1.80 5.4 < 1 12 130 165 0.83 1.46 < 1.0 < 1 13 125 167 0.97 1.48 23.4 < 1 14 112 162 0.91 1.17 6.4 < 1 15 120 163 1.08 1.13 147.4 < 1 16 124 152 1.16 1.07 4.4 < 1 17 126 168 1.20 1.06 262.3 < 1 18 125 174 1.36 1.43 117.9 < 1 19 121 160 1.42 1.13 12.4 6.1 Maximum 130 174 5.46 6 1.80 262.3 < 6.1 Minimum 106 142 0.77 < 6 1.00 < 1.0 < 1.0 Average 120 162 1.68 6 1.27 53.3 < 1.5 #Tests 11 11 11 1 11 0 11 11 0 Site ACMW-08N Nitrate-Nitrogen &Water Level Chlorides 5 5475 40 - 4 5470 30 3 5465 J ' a 20 2 5460 3 E 1 5455 10 - - 0 5450 09 10 11 12 13 14 15 16 17 18 19 0 09 10 11 12 13 14 15 16 17 18 19 —�—Nitrate —ill Water Level tChloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 -- - --- - 400 0.3 300 E E 0.2 200 0 100 .1 0 0.0 09 10 11 12 13 14 15 16 17 18 19 09 10 11 12 13 14 15 16 17 18 19 +TDS Linear(TDS) +Total P Linear(Total P) Annual Metal Report ACMW-08N Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr. Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L .mg/L ug/L ug/L . ug/L ug/L ug/L ug/L ug/L ug/L. ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/18/2009 13.7 1.50 4.10 9.0 17.2 <20 <2 39 <1 <0.5 <1 <20 43.5 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 8/10/2010 15.0 1.60 5.00 9.5 <0.5 <20 <1 34 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/13/2011 16.7 1.86 5.80 10.8 <0.5 <20 <1 37 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/26/2012 15.6 1.88 5.34 10.2 <10 <20 <1 36.2 <1 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 7/10/2013 16.1 1.78 5.60 10.1 7/9/2014 16.0 1.91 5.46 10.5 <0.5 <20 <1 38.2 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/19/2015 14.8 1.64 5.25 9.8 <0.5 <20 <1 36.6 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/10/2016 14.8 1.70 5.21 9.8 <0.5 <20 <1 33.8 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/27/2017 15.7 1.76 5.37 10.1 <0.5 <20 <1 41.2 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/29/2018 16.7 1.58 5.58 10.6 <0.5 <20 <1 40 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/14/2019 16.8 1.63 5.47 10.4 <0.5 <20 <1 39.4 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-09D SOUTH TAHOE PUBLIC UTILITY DISTRICT ,LPINE COUNTY GROUNDWATER QUALITY DAT 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 1/31/2019 33.97 5476.59 12.7 6.34 33.5 0.051 < 0.050 < 0.020 < 0.030 1.14 1.18 84 6/6/2019 24.93 5485.63 13.6 6.13 31.2 0.052 0.90< < 0.020 < 0.010 1.23 2.13 80 9/19/2019 24.37 5486.19 13.2 6.25 31.7 0.054 < 0.10 < 0.020 < 0.020, 0.999 0.955 81 11/7/2019 32.40 5478.16 12.8 6.29 33.0 0.065 0.22 < 0.020 < 0.020 1.00 1.22 86 Maximum 33.97 5486.19 13.6 6.34 33.5 0.065 0.900 < 0.020 < 0.030 1.23 2.13 86 Minimum 24.37 5476.59 12.7 6.13 31.2 0.051 < 0.050 < 0.020 < 0.010 0.999 0.955 80 Average 28.92 5481.64 13.1 6.25 32.4 0.056 0.318 < 0.020 < 0.020 1.09 1.37 83 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-09D SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Coll E. coli Fecal EC Chloride COD SO4 Color Chromo Chromo Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 1/31/2019 80.3 2.19 3.05 21.8 < 1 6/6/2019 80.3 1.48 2.16 < 1 < 1 9/19/2019 83.9 1.35 2.33 < 1 < 1 11/7/2019 86.0 1.44 2.90 < 1 < 1 Maximum 86.0 2.19 3.05 21.8 < 1 Minimum 80.3 1.35 2.16 < 1 < 1 Average 82.6 1.62 2.61 6.2 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-09D SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2009 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 09 27.4 5483.2 13.1 6.37 32 25 4.43 0.059 0.052 < 0.010 0.865 0.808 10 30.1 5478.7 12.9 6.22 33 0.058 < 0.050 < 0.010 0.870 0.920 11 34.3 5476.2 12.2 6.32 34 0.83 0.057 0.100 < 0.015 1.077 1.167 12 38.7 5471.9 13.1 6.68 32 1.60 0.107 0.121 0.020 < 0.010 0.750 0.880 13 35.4 5475.2 12.7 6.36 32 0.067 < 0.050 0.022 < 0.010 0.701 0.661 14 32.8 5477.7 13.2 6.57 32 0.067 0.060 0.027 < 0.010 0.716 0.722 15 36.9 5473.6 13.3 6.43 31 0.058 < 0.050 < 0.020 < 0.010 0.882 0.741 16 31.5 5479.1 12.6 6.31 33 0.059 < 0.078 < 0.020 < 0.010 0.968 0.798 17 24.6 5486.0 12.8 6.43 32 0.052 0.155 0.024 < 0.045 3.083 3.080 18 32.1 5478.4 12.6 6.17 32 0.058 0.070 0.065 < 0.011 1.318 1.340 19 28.9 5481.6 13.1 6.25 32 0.056 0.318 < 0.020 < 0.020 1.092 1.371 Maximum 38.7 5486.0 13.3 6.68 34 25 4.43 0.107 0.318 0.065 < 0.045 3.083 3.080 Minimum 24.6 5471.9 12.2 6.17 31 25 0.83 0.052 < 0.050 0.020 < 0.010 0.701 0.661 Average 32.1 5478.3 12.9 6.37 32 25 2.29 0.063 0.100 0.027 < 0.015 1.120 1.135 #Tests 11 11 11 11 11 1 3 11 11 8 11 11 11 Site: ACMW-09D SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2019 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 09 81 79 1.37 < 5 2.29 5.0 2.8 First year of sampling 10 79 81 1.28 2.59 5.2 2.3 11 84 85 1.61 2.78 < 1.0 < 1.0 12 87 79 1.39 2.83 < 1.0 < 1.0 13 83 76 1.35 3.26 < 1.0 < 1.0 14 80 76 1.41 3.57 < 1.0 < 1.0 15 82 81 1.41 3.56 < 1.0 < 1.0 16 83 79 1.48 3.45 130.1 < 1.0 17 95 97 1.58 3.55 176.8 < 1.0 18 87 81 1.37 2.66 56.1 < 1.0 19 83 83 1.62 2.61 6.2 < 1.0 Maximum 95 97 1.62 5 3.57 176.8 2.8 Minimum 79 76 1.28 < 5 2.29 < 1.0 < 1.0 Average 84 82 1.44 5 3.01 34.9 1.3 #Tests 11 11 11 1 11 0 11 11 0 Site ACMW-09D Nitrate-Nitrogen &Water Level Chlorides 5 ---- 5495 50 4 5490 40 - 5485 3 30 5480 E 2Jk 3 zo 5475 5470 10 0 5465 0 09 10 11 12 13 14 15 16 17 18 19 09 10 11 12 13 14 15 16 17 18 19 t Nitrate Water Level Linear(Nitrate) t Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 - - - 0.3 300 -- J J a -6 0.2 200 - E 0.1 100 - 0 0.0 09 10 11 12 13 14 15 16 17 18 19 09 10 11 12 13 14 15 16 17 18 19 —o—TDS Linear(TDS) t Total P Linear(Total P) Annual Metal Report ACMW-09D Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be . Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L . ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/18/2009 6.20 0.951 1.70 6.48 16.6 760 2.48 27 <1 <0.5 <1 <20 632 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 14.5 7/8/2010 7.30 <1 2.00 6.80 <0.5 570 <1 28 <1 <0.5 <1 <2 690 <0.2 14 <2 <5 0.54 <1 <5 <1 <3 <20 7/13/2011 6.85 1 1.78 7.89 <0.5 132 <1 23.4 <1 <0.5 <1 <2 85.1 <0.2 <2 <2 <5 <0.5 <1 <5 <3 <3 <20 7/26/2012 6.16 0.91 1.17 7.54 <10 79.6 <1 21.3 <1 <0.5 <1 <20 170 <0.2 <20 <2 <5 <2.5 <1 <5 <3 <3 <10 8/1/2014 6.34 <1 1.74 7.15 <0.5 105 1.74 21.2 <1 <0.5 <1 <2 296 <0.2 5.62 <2 <5 <0.5 <1 <5 <3 <3 <20 6/11/2015 6.30 1.12 1.70 7.74 <0.5 102 1.95 16.4 <1 <0.5 <1 <2 231 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2016 6.22 <1 1.69 7.68 <0.5 95.8 1.01 21.1 <1 0.671 <1 <2 35.4 <0.2 <2 <2 <5 0.618 <1 <5 <1 <3 <20 6/8/2017 7.85 <1 2.17 7.11 <0.5 106 <1 24.4 <1 <0.5 <1 <2 46.1 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 9/18/2018 6.56 <1 1.68 7.94 <0.5 203 <1 18 <1 <0.5 <1 <2 241 <0.2 <2 <2 <5 <0.5 <1 <5 <1 6/6/2019 6.43 <1.0 1.63 7.35 <0.5 124 <1 17.8 <1 <0.5 <1 <2 125 <0.2 2.06 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-10 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NOz-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 1/31/2019 29.51 5504.68 12.1 6.27 79.1 0.032 < 0.050 < 0.020 < 0.010 0.555 0.566 6/6/2019 24.00 5510.19 12.8 6.24 75.8 0.033 0.922 < 0.020 < 0.010 0.668 1.59 9/19/2019 12.68 5521.51 12.0 6.31 80.8 0.037 < 0.100 < 0.020 < 0.010 0.919 0.822 11/7/2019 29.46 5504.73 12.6 6.38 77.8 0.040 < 0.100 < 0.020 < 0.020 0.743 0.682 Maximum 29.51 5521.51 12.8 6.38 80.8 0.040 0.922 < 0.020 < 0.020 0.919 1.59 Minimum 12.68 5504.68 12.0 6.24 75.8 0.032 < 0.050 < 0.020 < 0.010 0.555 0.566 Average 23.91 5510.28 12.4 6.30 78.4 0.036 0.293 < 0.020 < 0.013 0.721 0.915 #Tests 4 4 4 4 4 00 4 4 4 4 4 4 Site: ACMW-10 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 1/31/2019 136 178 4.84 3.80 < 1 < 1 6/6/2019 125 171 4.32 4.26 < 1 < 1 9/19/2019 136 188 4.05 5.03 < 1 < 1 11/7/2019 136 187 5.36 5.38 < 1 < 1 Maximum 136 188 5.36 5.38 < 1 < 1 Minimum 125 171 4.05 3.80 < 1 < 1 Average 133 181 4.64 4.62 < 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-10 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2009 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 09 26.1 5508.1 11.8 6.46 113 100 1.51 0.044 < 0.050 < 0.010 0.141 0.171 10 25.7 5505.9 12.1 6.39 97 0.046 < 0.050 < 0.010 0.148 0.198 11 30.0 5504.2 10.8 6.52 85 0.044 < 0.050 < 0.010 0.145 0.218 12 34.3 5499.9 12.7 6.47 91 1.20 0.212 0.122 < 0.020 < 0.010 0.113 0.245 13 31.4 5502.8 12.0 6.43 82 0.035 0.056 < 0.020 < 0.010 0.150 0.156 14 30.7 5503.4 12.6 6.53 72 0.040 0.079 0.030 < 0.010 0.231 0.280 15- 33.4 5500.8 13.1 6.36 76 0.040 < 0.050 < 0.020 < 0.010 0.260 0.257 16 29.1 5505.1 12.8 6.34 74 0.039 < 0.078 < 0.020 < 0.010 0.798 0.784 17 26.2 5508.0 12.3 6.55 77 0.040 < 0.080 0.022 < 0.010 0.442 0.377 18 29.4 5504.7 12.6 6.28 77 0.039 < 0.091 0.020 < 0.008 0.461 0.495 19 23.9 5510.3 12.4 6.30 .78 0.036 0.293 < 0.020 < 0.013 0.721 0.915 Maximum 34.3 5510.3 13.1 6.55 113 100 1.51 0.212 0.293 0.030 < 0.013 0.798 0.915 Minimum 23.9 5499.9 10.8 6.28 72 100 1.20 0.035 < 0.050 < 0.020 < 0.008 0.113 0.156 Average 29.1 5504.8 12.3 6.42 84 100 1.35 0.056 0.091 0.022 < 0.010 0.328 0.372 #Tests 11 11 11 11 11 1 2 11 11 8 11 11 11 Site: ACMW-10 SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2019 Total Fecal TDS EC Chloride COD SO4 Color Coll E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 09 162 248 5.28 < 5 3.42 < 1.0 < 1.0 First year of sampling 10 145 208 4.91 3.60 < 1.0 < 1.0 11 131 190 4.99 3.43 < 2.4 < 1.0 12 153 193 4.48 2.54 < 1.0 < 1.0 13 124 176 4.03 2.31 < 1.0 < 1.0 14 114 159 4.51 3.35 < 1.0 < 1.0 15 129 175 4.56 2.88 < 1.0 < 1.0 16 128 169 4.96 3.30 < 1.0 < 1.0 17 116 168 4.51 4.53 < 1.0 < 1.0 18 134 230 4.61 4.11 < 1.0 < 1.0 19 133 181 4.64 4.62 < 1.0 < 1.0 Maximum 162 248 5.28 < 5 4.62 < 2.4 < 1.0 Minimum 114 159 4.03 < 5 2.31 < 1.0 < 1.0 Average 133 191 4.68 < 5 3.46 < 1.1 < 1.0 #Tests 11 11 11 1 11 0 11 11 0 Site ACMW-10 Nitrate-Nitrogen &Water Level Chlorides 1.0 -- 5515 50 0.8 5510 40 0.6 - - 5505 m 30 ip J J � ` E 0.4 -- 5500 ; 20 --- 0.2 - 5495 10 0.0 5490 0 09 10 11 12 13 14 15 16 17 18 19 09 10 11 12 13 14 15 16 17 18 19 �—Nitrate t Water Level Linear(Nitrate) —+—Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 — 300 J J 6 0.2 200 0.1 100 0 0.0 09 10 11 12 13 14 15 16 17 18 19 09 10 11 12 13 14 15 16 17 18 19 --o—TDS Linear(TDS) t Total P Linear(Total P) Annual Metal Report ACMW-10 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn .Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L' ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/18/2009 35.1 1.46 7.51 10.4 21.5 130 <2 31 <1 <0.5 <5 <20 137 <0.2 <20 2.9 <5 <2.5 <1 <5 <1 <3 <10 7/8/2010 24.0 <1 6.40 7.50 <0.5 330 <3 27 <1 <0.5 <1 <2 580 <0.2 20 <2 <5 <0.5 <3 <5 <3 <3 <20 7/26/2012 20.4 1.22 6.05 9.11 <10 324 <1 34.7 <1 <0.5 <1 <20 135 <0.2 <20 <2 <5 <3 <5 <3 <3 <10 8/1/2014 18.8 1.16 5.30 8.58 <0.5 <20 <1 30 <1 <0.5 <1 <2 24.1 <0.2 2.71 <2 <5 <0.5 <3 <5 <1 <3 <20 6/11/2015 16.5 <3 4.84 7.88 <0.5 <20 <1 30.7 <3 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <3 <5 <1 <3 <20 8/16/2016 17.1 <1 5.08 7.62 <0.5 51.2 <3 26.9 <3 <0.5 <1 <2 85 <0.2 3.2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/8/2017 17.9 <1 5.67 6.89 <0.5 827 <1 32.4 <3 <0.5 <1 <2 1320 <0.2 35.7 <2 <5 <0.5 <1 <5 <1 3.9 <20 9/18/2018 19.6 <1 5.49 8.28 <0.5 <20 <1 33.4 <1 <0.5 <1 <2 <20 <0.2 4.1 <2 <5 <0.5 <1 <5 <1 6/6/2019 18.9 <1.0 5.55 7.87 <0.5 440 <1 31.7 <1 <0.5 <1 <2 609 <0.2 18.8 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ►LPINE COUNTY GROUNDWATER QUALITY DAT. 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L m /L mg/L 1/31/2019 18.64 5484.37 11.5 6.22 30.1 0.016 < 0.050 < 0.020 < 0.010 2.95 2.97 81 6/6/2019 12.35 5490.66 10.7 6.20 28.4 0.016 < 0.050 < 0.020 < 0.010 0.956 0.916 58 9/19/2019 17.45 5485.56 13.4 6.03 44.4 0.019 < 0.10 < 0.020 < 0.040 2.23 2.27 98 11/7/2019 19.66 5483.35 12.1 6.00 42.8 0.024 < 0.10 < 0.020 < 0.010 3.00 2.74 75 Maximum 19.66 5490.66 13.4 6.22 44.4 0.024 < 0.10 < 0.020 < 0.040 3.00 2.97 98 Minimum 12.35 5483.35 10.7 6.00 28.4 0.016 < 0.050 < 0.020 < 0.010 0.956 0.916 58 Average 17.03 5485.99 11.9 6.11 36.4 0.019 < 0.075 < 0.020 < 0.018 2.28 2.22 78 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Coll E. coli Fecal EC Chloride COD SO4 Color chromo chromo Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 1/31/2019 102 2.55 5.04 < 1 < 1 6/6/2019 78.1 1.91 3.72 < 1 < 1 9/19/2019 132 3.99 8.23 < 1 < 1 11/7/2019 135 3.28 5.29 < 1 < 1 Maximum 135 3.99 8.23 < 1 < 1 Minimum 78.1 1.91 3.72 < 1 < 1 Average 112 2.93 5.57 < 1 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2009 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L m /L mg/L 09 19.6 5485.4 11.4 6.10 40 36 1.23 0.026 < 0.050 < 0.010 0.258 0.290 10 17.2 5483.6 11.4 5.95 35 0.031 < 0.050 < 0.010 0.422 0.472 11 23.7 5479.3 9.7 6.14 41 3.60 0.016 0.117 < 0.010 0.366 0.450 12 27.1 5475.9 11.1 6.60 32 1.50 0.123 0.207 0.021 < 0.010 0.554 0.771 13 23.2 5479.8 11.3 6.24 30 0.023 0.053 0.023 < 0.010 1.767 1.647 14 20.7 5482.3 13.6 6.27 28 0.029 0.138 0.032 < 0.025 2.773 2.873 15 24.9 5478.1 9.7 6.29 28 0.018 0.050 < 0.020 < 0.020 1.278 1.135 16 18.3 5484.7 12.8 6.17 26 0.021 0.190 < 0.020 < 0.030 2.931 2.642 17 15.6 5487.4 12.3 6.39 33 0.022 0.670 < 0.023 < 0.020 1.072 1.635 18 19.9 5483.1 11.8 6.08 35 0.019 0.140 < 0.020 < 0.011 2.920 3.063 19 17.0 5486.0 11.9 6.11 36 0.019 < 0.075 < 0.020 < 0.018 2.284 2.224 Maximum 27.1 5487.4 13.6 6.60 41 36 3.60 0.123 0.670 0.032 0.030 2.931 3.063 Minimum 15.6 5475.9 9.7 5.95 26 36 1.23 0.016 0.050 0.020 < 0.010 0.258 0.290 Average 20.7 5482.3 11.5 6.21 33 36 2.11 0.031 0.158 0.022 0.016 1.511 1.564 #Tests 11 11 11 11 11 1 3 11 11 8 11 11 11 Site: ACMW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2019 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 09 68 93 1.63 < 5 1.85 < 1.0 < 1.0 First year of sampling 10 63 83 1.45 2.39 < 1.0 < 1.0 11 67 90 1.71 2.37 < 1.0 < 1.0 12 140 79 1.71 2.60 < 1.0 < 1.0 13 69 83 1.95 3.06 < 1.0 < 1.0 14 75 94 3.17 4.55 < 1.0 < 1.0 15 66 82 1.95 4.40 1.0 < 1.0 16 69 92 2.27 4.47 < 1.0 < 1.0 17 65 82 1.74 3.47 < 1.0 < 1.0 18 85 138 2.28 3.72 < 1.0 < 1.0 19 78 112 2.93 5.57 < 1.0 < 1.0 Maximum 140 138 3.17 5 5.57 < 1.0 < 1.0 Minimum 63 79 1.45 < 5 1.85 < 1.0 < 1.0 Average 77 93 2.07 5 3.49 < 1.0 < 1.0 #Tests 11 11 11 1 11 0 11 11 0 Site ACMW-11 Nitrate-Nitrogen &Water Level Chlorides 5 5495 50 - 4 5490 40 � II 3 EL5485 d 30 - J ttt m 2 5480 ; 20 1 5475 10 0 5470 0 09 10 11 12 13 14 15 16 17 18 19 09 10 11 12 13 14 15 16 17 18 19 Nitrate f Water Level Linear(Nitrate) —�Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 --- 300 E E 0.2 200 0.1 100 0 0.0 09 10 11 12 13 14 15 16 17 18 19 09 10 11 12 13 14 15 16 17 18 19 --*--TDS Linear(TDS) +Total P Linear(Total P) Annual Metal Report ACMW-11 Diamond Valley Ranch Ca K Mg Na Ag AI As Ba Be Cd . Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L . ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 7/15/2009 8.80 2.30 2.50 4.50 <0.5 <20 <2 25 <1 <0.5 <1 <2 <50 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/8/2010 7.70 1.30 2.40 4.40 <0.5 600 <1 29 <1 <0.5 <1 <2 840 <0.2 19 <2 <5 <0.5 <1 <5 <1 <3 <20 7/13/2011 &64 1.25 2.58 4.67 <0.5 258 <1 27.2 <1 <0.5 <1 <2 210 <0.2 6.52 <2 <5 <0.5 <1 <5 <1 <3 <20 7/26/2012 7.27 1.28 1.92 4.50 <10 49.8 <1 21.6 <1 <0.5 <1 <20 80.5 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 8/1/2014 12.1 1.78 3.39 6.54 <0.5 <20 <1 39.8 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/11/2015 8.62 1.31 2.60 4.71 <0.5 188 1.59 22.3 <1 <0.5 <1 <2 253 <0.2 4.4 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2016 6.20 1.28 1.77 4.91 <0.5 145 <1 20.7 <1 <0.5 <1 <2 123 <0.2 3.19 <2 <5 <0.5 <1 <5 <1 <3 <20 6/8/2017 7.07 1.02 2.14 4.07 <0.5 30.4 <1 21.6 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 9/18/2018 10.6 1.16 2.98 5.42 <0.5 148 <1 34.1 <1 <0.5 <1 <2 163 <0.2 5.06 <2 <5 <0.5 <1 <5 <1 6/6/2019 7.23 <1.0 2.01 4.39 <0.5 26.2 <1 19.7 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT .LPINE COUNTY.GROUNDWATER QUALITY DAT 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 1/23/2019 32.72 5492.32 11.8 6.43 47.8 0.037 0.075 < 0.020 < 0.010 0.369 0.444 88 5/22/2019 20.80 5504.24 9.5 7.09 47.4 0.033 0.095 < 0.020 < 0.010 0.422 0.517 83 8/14/2019 23.88 5501.16 12.0 6.71 45.7 0.030 < 0.10 < 0.020 < 0.010 0.421 0.342 97 11/21/2019 31.91 5493.13 10.4 6.49 47.7 0.035 < 0.050 < 0.020 < 0.010 0.430 0.392 88 Maximum 32.72 5504.24 12.0 7.09 47.8 0.037 0.095 < 0.020 < 0.010 0.430 0.517 97 Minimum 20.80 5492.32 9.5 6.43 45.7 0.030 < 0.050 < 0.020 < 0.010 0.369 0.342 83 Average 27.33 5497.71 10.9 6.68 47.2 0.034 0.080 < 0.020 < 0.010 0.411 0.424 89 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Coll E. coli Fecal EC Chloride COD SO4 Color Chromo Chromo Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 1/23/2019 111 1.66 2.29 < 1 < 1 5/22/2019 105 1.74 2.52 < 1 < 1 8/14/2019 108 1.61 2.43 < 1 < 1 11/21/2019 111 1.62 2.44 < 1 < 1 Maximum 111 1.74 2.52 < 1 < 1 Minimum 105 1.61 2.29 < 1 < 1 Average 109 1.66 2.42 < 1 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2009 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 09 30.9 5494.1 12.3 6.82 64 60 0.30 0.034 < 0.050 < 0.010 0.774 0.804 10 30.7 5492.0 11.9 6.59 61 0.034 < 0.050 < 0.010 0.713 0.763 11 33.1 5491.9 11.5 6.70 57 0.21 0.032 < 0.058 < 0.010 0.602 0.669 12 34.9 5490.1 11.1 6.89 52 0.04 0.036 0.081 0.024 < 0.010 0.588 0.678 13 30.9 5494.2 11.5 6.83 53 0.053 0.232 0.023 < 0.010 0.553 0.758 14 30.8 5494.2 11.9 6.81 51 0.034 0.072 0.025 < 0.010 0.557 0.585 15 33.9 5491.1 12.1 6.63 50 0.041 < 0.050 < 0.020 < 0.010 0.558 0.551 16 27.9 5497.2 12.0 6.55 51 0.041 < 0.063 < 0.020 < 0.010 0.468 0.440 17 25.5 5499.5 11.9 6.73 49 0.048 < 0.075 0.021 < 0.010 0.353 0.293 18 29.0 5496.1 11.8 6.57 47 0.036 < 0.068 < 0.020 < 0.013 0.378 0.399 19 27.3 5497.7 10.9 6.68 47 0.034 0.080 < 0.020 < 0.010 0.411 0.424 Maximum 34.9 5499.5 12.3 6.89 64 60 0.30 0.053 < 0.232 0.025 < 0.013 0.774 0.804 Minimum 25.5 5490.1 10.9 6.55 47 60 0.04 0.032 < 0.050 0.020 < 0.010 0.353 0.293 Average 30.5 5494.4 11.7 6.71 53 60 0.18 . 0.038 < 0.080 0.022 < 0.010 0.541 0.579 #Tests 11 11 11 11 11 1 3 11 11 8 11 11 11 Site: ACMW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 1989 To: 2019 Total Fecal TDS EC Chloride COD SO4 Color Coll E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 09 114 142 1.89 7 4.26 < 1.0 < 1.0 First year of sampling 10 108 138 1.64 3.90 < 1.0 < 1.0 11 103 130 1.53 3.50 < 1.0 < 1.0 12 107 119 1.53 3.29 < 1.0 < 1.0 13 105 119 1.48 3.14 < 1.0 < 1.0 14 99 115 1.58 2.92 < 1.0 < 1.0 15 100 119 1.63 2.70 < 1.0 < 1.0 16 104 111 1.70 2.65 < 1.0 < 1.0 17 96 106 1.65 2.58 < 1.0 < 1.0 18 96 107 1.65 2.65 < 1.0 < 1.0 19 89 109 1.66 2.42 < 1.0 < 1.0 Maximum 114 142 1.89 7 4.26 < 1.0 < 1.0 Minimum 89 106 1.48 7 2.42 < 1.0 < 1.0 Average 102 119 1.63 7 3.09 < 1.0 < 1.0 #Tests 11 11 11 1 11 0 11 11 0 Site ACMW-12 Nitrate-Nitrogen &Water Level Chlorides 5 5505 50 4 5500 40 3 - -- - 5495 30 J y J E m E 2 5490 ; 20 — - - 1 - 5485 10 0 5480 0 09 10 11 12 13 14 15 16 17 18 19 09 10 11 12 13 14 15 16 17 18 19 t Nitrate t Water Level Linear(Nitrate) t Chloride Total Dissolved Solids (TDS) Total Phosphorus 500 - 0.4 400 0.3 _.. 300 J J rn 6 0.2 E E 200 1 _ 0.1 00 0 0.0 09 10 11 12 13 14 15 16 17 18 19 09 10 11 12 13 14 15 16 17 18 19 �TDS --*--Total P Annual Metal Report ACMW-12 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/18/2009 15.5 1.9 4.04 5.75 <10 22 <2 21 <1 <0.5 <1 <20 81.7 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 7/8/2010 16.0 1.40 4.00 4.90 <0.5 <20 <1 21 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/13/2011 15.0 1.56 3.81 4.79 <0.5 <20 <1 19.2 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/26/2012 12.9 1.51 3.27 4.56 <10 <20 <1 19.4 <1 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 7/10/2013 13.0 1.37 3.25 4.46 7/9/2014 13.5 1.59 3.66 4.82 <0.5 <20 <1 23 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/19/2015 12.7 1.28 3.62 4.58 <0.5 <20 <1 22.1 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/10/2016 12.1 1.32 3.52 4.52 <0.5 <20 <1 22.3 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 7/27/2017 11.0 1.27 3.15 4.12 <0.5 <20 <1 20.8 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/29/2018 11.4 1.09 3.19 4.26 <0.5 <20 <1 22.7 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/14/2019 11.5 1.19 3.18 4.39 <0.5 <20 <1 22.1 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L m /L m /L m /L m /L m /L 1/23/2019 9.76 5544.79 9.5 6.02 54.1 0.021 < 0.050 < 0.020 < 0.030 1.76 1.70 5/22/2019 8.74 5545.81 6.7 6.52 48.6 0.021 0.14 < 0.020 < 0.020 2.76 2.90 8/14/2019 10.00 5544.55 11.2 6.22 49.4 0.019 0.31 < 0.020 < 0.010 3.29 3.60 11/21/2019 11.20 5543.35 11.8 6.07 50.8 0.037 < 0.050 < 0.020 < 0.010 2.50 2.43 Maximum 11.20 5545.81 11.8 6.52 54.1 0.037 0.31 < 0.020 < 0.030 3.29 3.60 Minimum 8.74 5543.35 6.7 6.02 48.6 0.019 < 0.050 < 0.020 < 0.010 1.76 1.70 Average 9.93 5544.63 9.8 6.21 50.7 0.025 0.138 < 0.020 < 0.018 2.58 2.66 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 1/23/2019 112 135 2.69 3.27 < 1 < 1 5/22/2019 111 143 3.85 3.14 < 1 < 1 8/14/2019 135 166 8.96 2.01 < 1 < 1 11/21/2019 122 145 5.86 2.35 < 1 < 1 Maximum 135 166 8.96 3.27 < 1 < 1 Minimum 111 135 2.69 2.01 < 1 < 1 Average 120 147 5.34 2.69 < 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 10.9 5543.6 10.6 6.15 42 54.80 0.550 0.089 0.023 < 0.010 0.113 0.212 13 10.4 5544.1 8.7 6.45 40 0.658 0.135 0.027 0.014 0.092 0.223 14 11.3 5543.3 10.2 6.38 37 0.419 0.098 0.027 < 0.010 0.045 0.135 15 12.5 5542.1 10.7 6.21 38 0.025 0.068 < 0.020 < 0.010 0.050 0.115 16 10.8 5543.8 10.4 6.07 39 0.026 0.087 < 0.020 < 0.010 0.068 0.154 17 9.5 5545.1 9.5 6.34 46 0.024 0.080 0.022 < 0.010 0.395 0.412 18 11.2 5543.3 10.2 6.16 52 0.035 < 0.063 < 0.020 < 0.013 1.205 1.178 19 9.9 5544.6 9.8 6.21 51 0.025 0.138 < 0.020 < 0.018 2.578 2.658 Maximum 12.5 5545.1 10.7 6.45 52 54.80 0.658 0.138 0.027 0.018 2.578 2.658 Minimum 9.5 5542.1 8.7 6.07 37 54.80 0.024 0.063 0.020 < 0.010 0.045 0.115 Average 10.8 5543.7 10.0 6.25 43 54.80 0.220 0.094 0.022 0.012 0.568 0.636 #Tests 8 8 8 8 8 0 1 8 8 8 8 8 8 Site: ACMW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2019 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 109 90 1.40 2.24 1 < 1.0 First year of sampling 13 145 86 1.38 2.62 < 1 < 1 14 98 80 1.36 2.23 < 1 < 1 15 103 88 1.42 2.06 < 1 < 1 16 110 86 1.60 2.30 < 1 < 1 17 115 103 2.12 2.38 < 1 < 1 18 119 122 2.23 2.99 < 1 < 1 19 120 147 5.34 2.69 < 1 < 1.0 Maximum 145 147 5.34 2.99 1 < 1.0 Minimum 98 80 1.36 2.06 1 < 1.0 Average 115 100 2.10 2.44 1 < 1.0 #Tests 8 8 8 0 8 0 8 8 0 Site ACMW-13 Nitrate-Nitrogen &Water Level Chlorides 3.0 — 5550 50 2.5 - 5545 40 2.0 - -- 5540 30 E 1.5 J 5535 ; E 20 --- 1.0 0.5 5530 10 0.0 5525 0 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 �—Nitrate t Water Level —Linear(Nitrate) t Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 1.0 400 0.8 -- --- - 300 0.6 J J E 200 IE 0.4 0 0.0 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 t TDS Linear(TDS) +Total P Linear(Total P) Annual Metal Report ACMW-13 Diamond Valley Ranch Ca K Mg Na Ag . Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L. ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2012 9.07 2.30 2.90 5.36 <10 3500 <1 55.9 <1 <0.5 1.24 <20 3840 <0.2 106 <2 <5 <2.5 <1 <5 <1 6.03 18.5 7/10/2013 4.85 6.92 6.47 5.70 7/9/2014 7.80 2.08 2.71 4.90 <0.5 387 1.43 34.5 <1 <0.5 1.01 <2 3610 <0.2 30.6 <2 <5 <0.5 <1 <5 <1 <3 <20 8/19/2015 9.57 5.62 6.44 5.62 <0.5 13000 1.92 176 <1 <0.5 11.5 11.8 22700 <0.2 497 <2 5.93 5.3 <1 <5 <1 29.3 48.2 8/10/2016 8.22 2.43 3.08 4.89 <0.5 3810 <1 62.4 <1 <0.5 3.98 4.34 5260 <0.2 110 <2 <5 1.26 <1 <5 <1 8.06 <20 7/27/2017 11.2 2.90 4.19 5.59 <0.5 6060 1.01 91.1 <1 <0.5 5.1 4.95 7860 <0.2 170 <2 <5 1.99 <1 <5 <1 13.3 26.8 8/29/2018 13.4 2.47 4.16 6.71 <0.5 3840 <1 65.5 <1 <0.5 2.61 3.96 4860 <0.2 99.3 <2 <5 1.28 <1 <5 <1 7.37 <20 8/14/2019 17.0 3.89 6.41 7.56 <0.5 15200 2.88 183 <1 <0.5 8.88 9.42 17200 <0.2 450 <2 <5 4.95 <1 <5 <1 44 58.4 Site: ACMW-14 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/31/2019 15.78 5531.42 11.2 6.02 30.3 0.016 0.055 < 0.020 < 0.020 0.225 0.280 06/06/2019 13.20 5534.00 11.7 5.91 22.1 0.017 < 0.050 < 0.020 < 0.010 2.48 2.37 09/19/2019 14.38 5532.82 13.6 5.75 28.7 0.035 < 0.100 < 0.020 < 0.040 0.851 0.827 11/07/2019 17.14 5530.06 13.3 5.85 21.7 0.028 < 0.100 < 0.020 < 0.010 0.363 0.367 Maximum 17.14 5534.00 13.6 6.02 30.3 0.035 0.055 < 0.020 < 0.040 2.48 2.37 Minimum 13.20 5530.06 11.2 5.75 21.7 0.016 < 0.050 < 0.020 < 0.010 0.225 0.280 Average 15.13 5532.08 12.5 5.88 25.7 0.024 < 0.076 < 0.020 < 0.020 0.980 0.961 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-14 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 01/31/2019 61 69.6 1.43 2.38 1.0 1.0 06/06/2019 78 72.4 1.10 2.01 27.8 < 1 09/19/2019 76 72.0 1.21 2.11 62.4 1.0 11/07/2019 69 67.4 0.652 1.86 42.2 1.0 Maximum 78 72.4 1.43 2.38 62.4 1.0 Minimum 61 67.4 0.652 1.86 1.0 < 1 Average 71 70.4 1.10 2.09 33.4 1.0 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-14 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NOz-N NO,-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L - mg/L mg/L 12 19.3 5527.9 10.8 6.12 42 0.75 0.042 0.054 0.023 < 0.010 0.475 0.539 13 18.2 5529.0 10.8 6.20 37 0.056 0.052 0.025 < 0.012 0.706 0.698 14 19.5 5527.7 11.2 6.29 37 0.044 0.078 0.026 < 0.010 0.429 0.497 15 21.0 5526.2 11.4 6.23 38 0.042 < 0.050 < 0.020 < 0.010 0.565 0.568 16 18.4 5528.8 11.5 6.02 31 0.021 0.111 < 0.020 < 0.028 1.510 1.560 17 16.6 5530.6 10.7 6.03 24 0.022 1.123 0.023 < 0.140 9.225 10.338 18 16.5 5530.7 11.4 5.85 28 0.023 0.103 < 0.020 < 0.011 1.132 1.192 19 15.1 5532.1 12.5 5.88 26 0.024 < 0.076 < 0.020 < 0.020 0.980 0.961 Maximum 21.0 5532.1 12.5 6.29 42 0.75 0.056 1.123 0.026 0.140 9.225 10.338 Minimum 15.1 5526.2 10.7 5.85 24 0.75 0.021 0.050 0.020 < 0.010 0.429 0.497 Average 18.1 5529.1 11.3 6.08 33 0.75 0.034 0.206 0.022 0.030 1.878 2.044 #Tests 8 8 8 8 8 0 1 8 8 8 8 8 8 Site: ACMW-14 SOUTH TAHOE PUBLIC UTILITY DISTRICT PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2019 Total Fecal TDS EC Chloride COD SO4 Color Coll E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 77 94 1.25 1.95 1 < 1 First year of sampling 13 71 85 1.45 1.73 < 1 < 1 14 69 84 1.33 2.70 < 1 < 1 15 74 93 1.20 2.37 < 1 < 1 16 77 86 1.80 3.00 < 1 < 1 17 130 145 3.16 3.64 12 < 1 18 75 72 1.03 2.38 124 < 1 19 71 70 1.10 2.09 33 1 Maximum 130 145 3.16 3.64 124 < 1 Minimum 69 70 1.03 1.73 < 1 < 1 Average 81 91 1.54 2.48 22 < 1 #Tests 8 8 8 0 8 0 8 8 0 Site ACMW-14 Nitrate-Nitrogen &Water Level Chlorides 10 ------ 5545 50 8 -- 5540 40 6 5535 m 30 �y J m E 4 5530 ; 20 2 - - 5525 10 0 5520 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 tNitrate --4&—Water Level Linear(Nitrate) Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 300 J J E E 0.2 200 0 _ 100 .1 0 0.0 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 —t—TDS Linear(TDS) t Total P Linear(Total P) Annual Metal Report ACMW-14 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn. mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L .ug/L ug/L ug/L . ug/L ug/L ug/L ug/L ug/L 6/19/2012 9.04 0.55 2.52 5.82 <10 23.9 <1 41.8 <1 <0.5 <1 <20 62.4 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 8/1/2014 9.11 <1 2.87 5.82 <0.5 76.7 1.58 47.7 <1 <0.5 <1 <2 268 <0.2 5.17 <2 <5 <0.5 <1 <5 <1 <3 <20 6/11/2015 8.98 <1 2.80 6.15 <0.5 98.7 1.67 43.8 <1 <0.S <1 <2 182 <0.2 5.27 <2 <5 <0.5 <1 <5 <1 <3 <20 8/16/2016 7.86 <1 2.53 5.03 <0.5 181 <1 44.8 <1 <0.5 <1 <2 216 <0.2 4.82 <2 <5 <0.5 <1 <5 <1 <3 <20 6/8/2017 1S.9 <1 5.24 6.48 <0.5 804 <1 105 <1 <0.5 1.44 <2 1380 <0.2 24.4 <2 <5 <0.5 <1 <5 <1 3.1 <20 9/18/2018 7.27 <1 2.30 4.96- <0.5 971 <1 47.4 <1 <0.5 1.44 <2 803 <0.2 9.09 <2 <5 <0.5 <1 <5 <1 6/6/2019 6.74 <1 2.14 4.41 <0.5 1060 <1 43.8 <1 <0.5 1.37 <2 767 <0.2 8.51 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT LPINE COUNTY GROUNDWATER QUALITY DAT 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L 03/07/2019 11.73 5488.87 11.4 6.00 27.7 0.029 < 0.070 < 0.020 < 0.010 0.731 0.712 54 06/13/2019 9.05 5491.55 13.0 5.96 29.1 0.030 < 0.050 < 0.020 < 0.010 0.118 0.148 44 09/24/2019 14.65 5485.95 16.5 5.58 33.0 0.030 < 0.100 < 0.020 < 0.010 0.301 0.289 59 12/19/2019 19.58 5481.02 13.6 6.21 30.0 0.028 < 0.100 0.020 < 0.010 0.312 0.304 60 Maximum 19.58 5491.55 16.5 6.21 33.0 0.030 < 0.100 0.020 < 0.010 0.731 0.712 60 Minimum 9.05 5481.02 11.4 5.58 27.7 0.028 < 0.050 < 0.020 < 0.010 0.118 0.148 44 Average 13.75 5486.85 13.6 5.94 30.0 0.029 < 0.080 < 0.020 < 0.010 0.366 0.363 54 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 4 Site: ACMW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Coli E. coli Fecal EC Chloride COD SO4 Color chromo chromo Strep Date umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/07/2019 63 1.05 1.60 < 1 < 1 06/13/2019 66 0.640 1.42 4.1 < 1 09/24/2019 75 1.00 1.16 < 1 < 1 12/19/2019 64 0.818 1.60 < 1 < 1 Maximum 75 1.05 1.60 4.1 < 1 Minimum 63 0.640 1.16 < 1 < 1 Average 67 0.877 1.45 1.8 < 1 #Tests 4 4 0 4 0 4 4 0 Site: ACMW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 23.6 5477.0 12.3 5.97 31 4.60 0.042 0.055 0.024 < 0.010 0.659 0.724 13 23.7 5476.9 12.2 6.12 28 0.042 0.088 0.032 < 0.012 0.934 1.018 14 25.6 5475.0 13.1 6.11 27 0.037 0.055 0.022 < 0.013 1.160 1.185 15 27.8 5472.8 12.7 6.06 27 0.024 0.059 < 0.020 < 0.017 1.557 1.610 16 15.8 5484.8 13.6 5.94 25 0.028 0.335 < 0.020 < 0.058 6.105 6.423 17 12.0 5488.6 13.7 6.19 28 0.031 0.105 < 0.020 < 0.013 0.673 0.705 18 16.7 5483.9 14.9 6.15 30 0.033 0.074 < 0.020 < 0.020 0.360 0.396 19 13.8 5486.8 13.6 5.94 30 0.029 < 0.080 < 0.020 < 0.010 0.366 0.363 Maximum 27.8 5488.6 14.9 6.19 31 4.60 0.042 0.335 0.032 0.058 6.105 6.423 Minimum 12.0 5472.8 12.2 5.94 25 4.60 0.024 < 0.055 0.020 < 0.010 0.360 0.363 Average 19.9 5480.7 13.3 6.06 28 4.60 0.033 0.106 0.022 0.019 1.477 1.553 #Tests 8 8 8 8 8 0 1 8 8 8 8 8 8 Site: ACMW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT ,PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2019 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 65 73 1.46 1.82 < 1 < 1 First year of sampling 13 65 72 1.62 1.78 < 1 < 1 14 61 72 1.58 1.82 < 1 < 1 15 68 86 1.64 1.81 < 1 < 1 16 99 114 3.09 3.18 3 < 1 17 56 70 0.81 1.76 3 < 1 18 55 69 1.21 1.46 2 < 1 19 54 67 0.88 1.45 2 < 1 Maximum 99 114 3.09 3.18 < 3 < 1 Minimum 54 67 0.81 1.45 < 1 < 1 Average 65 78 1.53 1.88 < 2 < 1 #Tests 8 8 8 0 8 0 8 8 0 Site ACMW-15 Nitrate-Nitrogen &Water Level Chlorides 10 5490 20 8 5485 15 -- - - 6 5480 m J m J E J 10 -- 4 - 5475 ; 5 - 2 5470 0 5465 0 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 t Nitrate f Water Level Linear(Nitrate) tChloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 , 0.4 - -- 400 0.3 300 J J E E 0.2 - 200 100 0.1 0 0.0 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 ---r—TDS Linear(TDS) ---*—TotalP Linear(Total P) Annual Metal Report ACMW-15 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2012 7.63 1.17 1.72 4.4 <10 561 <1 38.2 <1 <0.5 <1 <20 376 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/12/2013 6.41 1.20 1.59 4.1 6/5/2014 7.08 1.15 1.67 4.4 <0.5 69.8 <1 30.6 <1 <0.5 <1 <2 67.6 <0.2 3.52 <2 <5 <0.5 <1 <5 <1 <3 <20 6/2/2015 7.49 1.08 1.75 4.2 <0.5 35 <1 34 <1 <0.5 <1 <2 46.2 <0.2 2.15 <2 <5 <0.5 <1 <5 <1 <3 <20 8/30/2016 11.1' 1.59 2.56 5.0 <0.5 22.3 <1 42.4 <1 <0.5 <1 <2 21.3 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/20/2017 6.60 <1 1.57 3.9 <0.5 152 <1 22.5 <1 <0.5 <1 <2 152 <0.2 3.62 <2 <5 <0.5 <1 <5 <1 <3 <20 9/20/2018 7.25 <1 1.68 3.6 <0.5 67.3 <1 29.3 <1 <0.5 <1 <2 35.1 <0.2 3.62 <2 <5 <0.5 <1 <5 <1 <3 <20 6/13/2019 6.88 <1 1.60 3.3 <0.5 39.8 <1 25.7 <1 <0.5 <1 <2 33.9 <0.2 3.62 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NOZ-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 03/07/2019 4.50 5480.03 8.4 6.30 39.0 0.052 < 0.070 < 0.020 < 0.010 2.75 2.81 06/13/2019 9.20 5475.33 11.0 6.19 49.9 0.048 < 0.050 < 0.020 < 0.010 0.398 0.431 09/24/2019 10.15 5474.38 16.0 5.69 55.8 0.054 < 0.100 < 0.020 < 0.010 0.292 0.298 12/19/2019 11.91 5472.62 12.7 6.27 58.8 0.049 < 0.100 < 0.020 < 0.010 0.164 0.188 Maximum 11.91 5480.03 16.0 6.30 58.8 0.054 < 0.100 < 0.020 < 0.010 2.75 2.81 Minimum 4.50 5472.62 8.4 5.69 39.0 0.048 < 0.050 < 0.020 < 0.010 0.164 0.188 Average 8.94 5475.59 12.0 6.11 50.9 0.051 < 0.080 < 0.020 < 0.010 0.901 0.932 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Coll E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/07/2019 86 107 2.61 2.51 3.1 < 1 06/13/2019 73 116 1.17 2.27 1.0 < 1 09/24/2019 91 123 1.46 1.64 1.0 < 1 12/19/2019 89 120 1.32 1.64 < 1 < 1 Maximum 91 123 2.61 2.51 3.1 < 1 Minimum 73 107 1.17 1.64 < 1 < 1 Average 85 117 1.64 2.02 2 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 17.1 5467.4 11.6 6.24 66 5.60 0.156 0.061 0.024 < 0.010 0.403 0.474 13 16.6 5468.0 11.7 6.43 75 0.118 0.069 0.029 < 0.012 0.310 0.356 14 15.2 5469.3 11.9 6.41 52 0.071 0.188 0.023 < 0.010 2.128 2.290 15 18.0 5466.6 12.1 6.41 53 0.061 0.060 < 0.020 < 0.013 0.776 0.795 16 11.8 5472.8 12.7 6.26 42 0.051 0.683 < 0.020 < 0.055 7.130 7.813 17 9.5 5475.0 12.7 6.38 53 0.056 0.133 < 0.020 < 0.013 1.408 1.445 18 11.2 5473.3 14.0 6.35 55 0.047 0.083 < 0.020 < 0.015 0.712 0.760 19 8.94 5475.6 12.0 6.11 51 0.051 < 0.080 < 0.020 < 0.010 0.901 0.932 Maximum 18.0 5475.6 14.0 6.43 75 5.60 0.156 0.683 0.029 0.055 7.130 7.813 Minimum 8.9 5466.6 11.6 6.11 42 5.60 0.047 < 0.060 0.020 < 0.010 0.310 0.356 Average 13.5 5471.0 12.3 6.32 56 5.60 0.076 0.170 0.022 0.017 1.721 1.858 #Tests 8 8 8 8 8 0 1 8 8 8 8 8 8 Site: ACMW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2019 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 116 135 3.46 1.33 2 < 1 First year of sampling 13 128 156 3.55 0.82 1 < 1 14 109 132 3.64 1.26 1 < 1 15 98 128 2.38 1.32 1 < 1 16 133 163 3.62 3.99 9 < 1 17 93 132 1.43 3.36 4 < 1 18 86 121 1.30 1.83 < 1 < 1 19 85 117 1.64 2.02 2 < 1 Maximum 133 163 3.64 3.99 9 < 1 Minimum 85 117 1.30 0.82 < 1 < 1 Average 106 136 2.63 1.99 3 < 1 #Tests 8 8 8 0 8 0 8 8 0 Site ACMW-16 Nitrate-Nitrogen &Water Level Chlorides 10 5485 40 8 5480 30 6 5475 0 m J £ �1 E 20 4 5470 3 2 -- 5465 10 0 5460 0 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 t Nitrate T Water Level Linear(Nitrate) —t—Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 300 E E 0.2 200 0.1 100 0 0.0 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 —r-TDS Linear(TDS) ---*—Total P Linear(Total P) Annual Metal Report ACM W-16 Diamond Valley Ranch Ca. K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb .Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2012 14.1 1.40 3.79 7.11 <10 849 <1 39.8 <1 <0.5 <1 <20 830 <0.2 22.5 <2 <5 <2.5 <1 <5 <1 <3 <10 6/12/2013 16.1 1.21 4.15 7.97 6/5/2014 14.2 1.68 4.33 7.01 <0.5 109 1.88 42 <1 <0.5 <1 <2 466 <0.2 3.88 <2 <5 <0.5 <1 <5 <1 <3 <20 6/2/2015 13.2 1.21 4.00 6.89 <0.5 212 2.1 27.6 <3 <0.5 <1 <2 41.6 <0.2 4.35 <2 <5 <0.5 <1 <5 <1 <3 <20 8/30/2016 15.0 3.83 4.12 7.5 <0.5 62.7 <1 80 <1 <0.5 <1 <2 56.4 <0.2 2.06 <2 <5 <0.5 <1 <5 <1 <3 <20 6/20/2027 11.7 3.68 3.35 5.68 <0.5 151 <1 58.2 <1 <0.5 <1 <2 50.3 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 9/20/2018 12.1 4.04 3.29 6.22 <0.5 120 <1 82.5 <1 <0.5 <1 <2 68.0 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/13/2019 11.1 3.51 3.05 5.11 <0.5 41.1 <1 68.6 <1 <0.5 <1 <2 30.4 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 03/07/2019 8.70 5496.22 5.7 6.35 29.9 0.019 0.140 < 0.020 < 0.010 1.23 1.37 06/13/2019 4.55 5500.37 10.3 6.22 31.0 0.029 0.055 < 0.020 < 0.010 0.657 0.712 09/24/2019 8.15 5496.77 11.2 6.17 38.2 0.025 < 0.100 < 0.020 < 0.010 1.05 0.990 12/19/2019 15.70 5489.22 10.6 6.30 44.5 0.024 < 0.100 < 0.020 < 0.010 0.830 0.798 Maximum 15.70 5500.37 11.2 6.35 44.5 0.029 0.140 < 0.020 < 0.010 1.23 1.37 Minimum 4.55 5489.22 5.7 6.17 29.9 0.019 < 0.100 < 0.020 < 0.010 0.657 0.712 Average 9.28 5495.65 9.5 6.26 35.9 0.024 0.099 < 0.020 < 0.010 0.942 0.968 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/07/2019 61 77 2.04 2.48 2.0 < 1 06/13/2019 55 82 1.61 2.50 < 1 < 1 09/24/2019 77 100 3.43 2.40 < 1 < 1 12/19/2019 82 111 4.80 2.56 < 1 < 1 Maximum 82 111 4.80 2.56 2.0 < 1 Minimum 55 77 1.61 2.40 < 1 < 1 Average 69 93 2.97 2.49 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 17.5 5487.4 11.8 6.20 41 2.8 0.031 < 0.050 0.023 < 0.017 1.449 1.516 13 15.2 5489.7 10.9 6.40 39 0.054 < 0.055 0.030 < 0.018 1.395 1.429 14 11.5 5493.4 11.9 6.38 36 0.037 < 0.050 0.022 < 0.010 0.864 0.880 15 17.3 5487.6 11.0 6.30 36 0.025 < 0.050 < 0.020 < 0.013 .0.450 0.455 16 11.0 5493.9 12.2 6.22 35 0.027 < 0.105 < 0.074 < 0.025 1.033 1.032 17 9.5 5495.4 11.1 6.30 34 0.030 0.090 < 0.020 < 0.010 0.924 0.867 18 13.6 5491.4 11.6 6.43 35 0.029 0.087 < 0.020 < 0.013 0.617 0.664 19 9.3 5495.6 9.5 6.26 36 0.024 0.099 < 0.020 < 0.010 0.942 0.968 Maximum 17.5 5495.6 12.2 6.43 41 2.8 0.054 0.105 0.074 0.025 1.449 1.516 Minimum 9.3 5487.4 9.5 6.20 34 2.8 0.024 < 0.050 0.020 < 0.010 0.450 0.455 Average 13.1 5492.2 11.3 6.31 36 2.8 0.032 0.073 0.029 0.014 0.959 0.976 #Tests 8 9 8 8 8 0 1 8 8 8 8 8 8 Site: ACMW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT .PINE COUNTY GROUNDWATER QUALITY DA From 2012 To: 2019 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 78 105 2.25 2.26 1 < 1 First year of sampling 13 79 100 2.17 2.44 1 < 1 14 72 87 1.65 2.79 1 < 1 15 70 90 1.59 2.82 1 < 1 16 77 91 1.73 3.00 < 1 < 1 17 72 89( 1.78 3.33 < 1 < 1 18 67 88 2.07 2.34 < 1 < 1 19 69 93 2.97 2.49 1 < 1 Maximum 79 105 2.97 3.33 1 < 1 Minimum 67 87 1.59 < 2.26 < 1 < 1 Average 73 93 2.03 2.68 1 < 1 #Tests 8 8 8 0 8 0 8 8 0 Site ACMW-17 Nitrate-Nitrogen & Water Level Chlorides 5500 40 4 5495 30 s: 3 5490 m J J 01 20 m E 2 5485 ; 10 5480 0 5475 0 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 —- Nitrate Water Level Linear(Nitrate) +Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 - 400 0.3 300 J J rn al 0.2 -. E E 200 0.1 100 0 0.0 15 16 17 18 19 12 13 14 15 16 17 18 19 TDS Linear(TDS) --e—Total P Linear(Total P) Annual Metal Report ACM W-17 Diamond Valley Ranch Ca K Mg Na Ag AI As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2012 10.3 1.59 2.77 5.56 <10 199 <1 28 <1 <0.5 <1 <20 149 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/12/2013 9.15 1.65 2.25 5.25 6/5/2014 8.40 1.35 2.53 4.72 <0.5 86.2 1.12 24.1 <1 <0.5 <1 <2 327 <0.2 6.29 <2 <5 <0.5 <1 <5 <1 <3 <20 6/2/2015 7.69 1.06 2.23 4.28 <0.5 27.8 <1 20.8 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 8/30/2016 8.50 1.54 2.36 4.99 <0.5 <20 <1 23.4 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/20/2017 8.08 2.11 2.35 4.6 <0.5 <20 <3 18.3 <1 <0.5 <2 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 9/20/2018 8.15 1.00 2.25 4.58 <0.5 <20 <1 20.5 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/13/2019 7.63 <3 2.13 4.3 <0.5 32.0 <1 18.1 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-18 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 03/20/2019 7.20 5463.36 9.6 6.04 30.2 0.035 < 0.100 < 0.020 < 0.010 1.30 1.24 06/13/2019 6.11 5464.45 12.9 6.30 33.0 0.032 0.060 < 0.020 < 0.010 1.12 1.18 09/24/2019 6.74 5463.82 14.5 5.89 28.2 0.033 < 0.100 < 0.020 < 0.010 0.983 0.862 12/19/2019 8.28 5462.28 13.1 6.61 31.7 0.032 < 0.100 < 0.020 < 0.010 0.465 0.431 Maximum 8.28 5464.45 14.5 6.61 33.0 0.035 < 0.100 < 0.020 < 0.010 1.30 1.24 Minimum 6.11 5462.28 9.6 5.89 28.2 0.032 < 0.100 < 0.020 < 0.010 0.465 0.431 Average 7.08 5463.48 12.5 6.21 30.8 0.033 0.090 < 0.020 < 0.010 0.967 0.928 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-18 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/20/2019 57 86.5 1.75 2.31 1.0 < 1 06/13/2019 57 89.1 1.48 2.07 3.0 < 1 09/24/2019 49 75.8 1.05 2.20 13.4 < 1 12/19/2019 53 70.0 1.07 2.23 < 1 < 1 Maximum 57 89.1 1.75 2.31 13.4 < 1 Minimum 49 70.0 1.05 2.07 < 1 < 1 Average 54 80.4 1.34 2.20 4.6 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-18 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO,-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 11.3 5459.2 12.6 6.18 37 5.20 0.037 0.135 0.023 < 0.010 0.940 1.085 13 10.2 5460.3 11.9 6.51 36 0.049 0.052 0.028 < 0.015, 1.023 1.041 14 8.5 5462.1 12.9 6.48 33 0.031 0.061 0.021 < 0.015 1.500 1.558 15 10.3 5460.3 12.9 6.43 37 0.031 < 0.050 < 0.020 < 0.013 0.401 0.413 16 8.2 5462.3 12.4 6.40 30 0.030 0.203 < 0.020 < 0.035 2.545 2.710 17 6.8 5463.8 12.6 6.58 27 0.031 0.115 < 0.020 < 0.018 1.949 1.937 18 8.6 5462.0 12.9 6.38 34 0.032 0.115 < 0.020 < 0.010 0.594 0.637 19 7.1 5463.5 12.5 6.21 31 0.033 0.090 < 0.020 < 0.010 0.967 0.928 Maximum 11.3 5463.8 12.9 6.58 37 5.20 0.049 0.203 0.028 0.035 2.545 2.710 Minimum 6.8 5459.2 11.9 6.18 27 5.20 0.030 0.050 0.020 < 0.010 0.401 0.413 Average 8.9 5461.7 12.6 6.40 33 5.20 0.034 0.103 0.021 0.016 1.240 1.288 #Tests 8 8 8 8 8 0 1 8 8 8 8 8 8 Site: ACMW-18 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2019 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L m /L Units MPN MPN MPN Comments 12 64 86 1.47 2.23 2 < 1 First year of sampling 13 67 89 1.87 2.27 < 1 < 1 14 67 85 1.62 2.45 1 < 1 15 63 91 1.49 2.50 3 < 1 16 72 91 1.89 2.60 4 < 1 17 64 81 1.09 3.34 1 < 1 18 58 80 1.27 2.15 10 < 1 19 54 80 1.34 2.20 5 < 1 Maximum 72 91 1.89 3.34 10 < 1 Minimum 54 80 1.09 2.15 < 1 < 1 Average 64 85 1.50 2.47 3 < 1 #Tests 8 8 8 0 8 0 8 8 0 Site ACMW-18 Nitrate-Nitrogen &Water Level Chlorides 5 -—---- --------- 5475 40 4 5470 30 --- - - - -- -- — e 3 - 5465 m I .J E E 20 0 2 - - 5460 3 10 - -- 1 - 5455 5450 0 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 --9-Nitrate T Water Level Linear(Nitrate) t Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 - 0.3 300 - J J E 0.2 - 200 100 -- 0.1 -- 0 0.0 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 t TDS Linear(TDS) t Total P Linear(Total P) Annual Metal Report ACM W-18 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2022 9.3 1.05 2.38 3.74 <10 433 <1 22 <1 <0.5 <1 <20 321 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 <10 6/12/2013 9.07 0.984 2.51 3.72 6/5/2014 10.8 1.15 2.87 4.39 <0.5 <20 <1 20.3 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/2/2015 10.1 1.61 3.35 4.15 <0.5 2450 2.22 44 <1 <0.5 5.22 2.66 3580 <0.2 76.2 1.95 <5 1.59 <1 <5 <1 5.49 <20 8/30/2016 8.37 1.08 2.19 3.69 <0.5 36.3 <1 16.6 <1 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/20/2017 7.46 <1 2.02 3.38 <0.5 109 <1 14.1 <1 <0.5 <1 <2 33.7 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 9/20/2018 8.55 <1 2.22 3.75 <0.5 20 <1 16.7 <1 <0.5 <1 <2 <20 <0.2 2.4 2.04 <5 <0.5 <1 <5 <1 <3 <20 6/13/2019 9.32 <1 2.43 3.97 <0.5 <20 <1 17.3 <1 <0.5 <1 <2 <20 <0.2 3.63 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: ACMW-19 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 03/20/2019 7.00 5410.25 9.9 6.35 82.3 0.092 0.157 0.045 < 0.010 < 0.010 0.157 06/13/2019 7.44 5409.81 12.4 6.68 88.9 0.102 0.147 0.048 < 0.010 < 0.012 0.147 09/24/2019 7.70 5409.55 14.5 6.53 99.4 0.102 0.167 0.044 < 0.010 < 0.010 0.167 12/19/2019 7.22 5410.03 12.8 6.82 94.3 0.097 0.147 0.030 < 0.010 < 0.010 0.147 Maximum 7.70 5410.25 14.5 6.82 99.4 0.102 0.167 0.048 < 0.010 < 0.012 0.167 Minimum 7.00 5409.55 9.9 6.35 82.3 0.092 0.147 0.030 < 0.010 < 0.010 0.147 Average 7.34 5409.91 12.4 6.60 91.2 0.098 0.155 0.042 < 0.010 < 0.011 0.155 #Tests 4 4 4 4 4 0 0 4 4 4 4 4 4 Site: ACMW-19 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Coli E. coli Fecal TDS EC Chloride COD SO4 Color Chromo Chromo Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 03/20/2019 118 186 4.22 2.32 4.1 < 1 06/13/2019 127 207 9.12 4.08 < 1 < 1 09/24/2019 134 212 5.46 2.84 < 1 < 1 12/19/2019 125 183 2.98 1.36 < 1 < 1 Maximum 134 212 9.12 4.08 4.1 < 1 Minimum 118 183 2.98 1.36 < 1 < 1 Average 126 197 5.45 2.65 1.8 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: ACMW-19 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From: 2012 To: 2019 Depth Water Temp Alk Hard Turb Total P TKN NH3-N NOz-N NO3-N Total N Year ft Level C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 12 7.4 5409.9 12.9 6.75 106 6.70 0.092 0.106 0.050 < 0.010 0.010 0.126 13 7.1 5410.2 12.4 6.88 105 0.129 0.159 0.067 0.012 < 0.010 0.160 14 7.7 5409.6 12.5 6.80 129 0.111 0.121 0.041 0.010 < 0.010 0.123 15 8.3 5409.0 13.1 6.84 93 0.104 0.126 0.050 < 0.010 < 0.010 0.128 16 7.7 5409.6 12.7 6.75 105 0.102 0.139 0.050 < 0.015 < 0.020 0.139 17 7.0 5410.3 12.8 6.91 91 0.100 0.175 0.050 < 0.010 < 0.010 0.175 18 7.6 5409.7 13.6 6.64 104 0.103 0.175 0.043 < 0.013 < 0.009 0.150 19 7.3 5409.9 12.4 6.60 91 0.098 0.155 0.042 < 0.010 < 0.011 0.155 Maximum 8.3 5410.3 13.6 6.91 129 6.70 0.129 0.175 0.067 0.015 0.020 0.175 Minimum 7.0 5409.0 12.4 6.60 91 6.70 0.092 < 0.106 0.041 < 0.010 < 0.009 0.123 Average 7.5 5409.8 12.8 6.77 103 6.70 0.105 0.144 0.049 0.011 0.011 0.144 #Tests 8 8 8 8 8 0 1 8 8 8 8 8 8 Site: ACMW-19 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2012 To: 2019 Total Fecal TDS EC Chloride COD SO4 Color Coli E. coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 12 144 221 2.81 2.87 2 < 1 First year of sampling 13 154 241 2.97 1.62 1 < 1 14 152 253 2.47 2.00 3 < 1 15 120 192 2.46 2.29 < 1 < 1 16 138 213 3.47 2.91 6 < 1 17 155 238 14.32 8.17 1 < 1 18 135 216 4.33 2.08 < 1 < 1 19 126 197 5.45 2.65 2 < 1 Maximum 155 253 14.32 8.17 6 < 1 Minimum 120 192 2.46 1.62 < 1 < 1 Average 140 221 4.78 3.07 2 < 1 #Tests 8 8 8 0 8 0 8 8 0 Site ACMW-19 Nitrate-Nitrogen &Water Level Chlorides 0.25 ---- ------- 5425 40 0.20 5420 30 0.15 5415 m J m J o) J a 20 m E 0.10 5410 3 10 — 0.05 5405 0.00 5400 0 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 —�Nitrate Water Level Linear(Nitrate) t Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Phosphorus 500 0.4 400 0.3 - 300 E 0.2 200 100 - - 0.1 0 0.0 12 13 14 15 16 17 18 19 12 13 14 15 16 17 18 19 ---*.--TDS Linear(TDS) +Total P Linear(Total P) Annual Metal Report ACMW-19 Diamond Valley Ranch Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/19/2012 20.5 2.08 5.87- 10.3 <10 358 1.2 32.8 <1 <0.5 <1 <20 611 <0.2 1690 3.08 <5 <2.5 <1 <5 <1 <3 <10 6/12/2013 21.7 2.07 7.01 9.86 6/5/2014 31.8 2.35 10.1 10.1 <1 255 2.33 103 <2 <1 <2 <4 750 <0.2 4980 <4 <10 <1 <2 <10 <2 <6 <40 6/2/2015 18.4 1.44 5.77 7.06 <0.5 <20 <1 80 <1 <0.5 <1 <2 138 <0.2 2400 3.77 <5 <0.5 <1 <5 <1 <3 <20 8/30/2016 23.9 2.14 7.21 8.44 <0.5 <20 <1 108 <1 <0.5 <1 <2 212 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 <20 6/20/2017 25.8 1.73 8.08 9.10 <0.5 22.8 <1 108 <1 <0.5 <1 <2 232 <0.2 3380 2.44 <5 <0.5 <1 <5 <1 <3 <20 9/20/2018 22.8 1.54 6.77 10.8 <0.5 <20 <1 106 <1 <0.5 <1 <2 176 <0.2 3140 3.52 <5 <0.5 <1 <5 <1 <3 <20 6/13/2019 21.1 1.42 6.31 9.91 <0.5 <20 <1 93.6 <1 <0.5 <1 <2 156 <0.2 3000 3.29 <5 <0.5 <1 <5 <1 <3 <20 ALPINE COUNTY POTABLE WATER WELLS Site: GW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/31/19 9.4 6.45 61.8 0.032 0.220 < 0.020 < 0.010 4.62 4.84 06/06/19 14.2 6.11 61.2 0.038 0.050 < 0.020 < 0.010 4.15 4.20 09/19/19 13.1 6.12 60.6 0.040 < 0.10 < 0.020 < 0.050 3.76 3.43 11/07/19 12.7 6.21 60.5 0.042 < 0.10 < 0.020 < 0.010 3.77 3.72 Maximum 14.2 6.45 61.8 0.042 0.220 < 0.020 < 0.050 4.62 4.84 Minimum 9.4 6.11 60.5 0.032 < 0.100 < 0.020 < 0.010 3.76 3.43 Average 12.4 6.22 61.0 0.038 0.118 < 0.020 < 0.020 4.08 4.05 #Tests 4 4 4 0 0 4 4 4 4 4 4 Site: GW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 01/31/19 186 281 29.7 10.3 < 1 < 1 06/06/19 169 250 25.9 9.68 < 1 < 1 09/19/19 170 267 21.0 8.46 2.0 < 1 11/07/19 170 263 25.6 9.29 < 1 < 1 Maximum 186 281 29.7 10.3 2.0 < 1 Minimum 169 250 21.0 8.5 < 1 < 1 Average 174 265 25.6 9.4 1.3 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: GW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2019 Temp Alk Hard Turb Total P TKN NH3-N NOZ-N NO3-N Total N Year C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 81 12.0 6.59 48.0 0.10 0.040 0.177 0.040 0.940 1.12 82 9.8 6.40 47.0 0.040 0.070 0.010 0.960 1.03 83 11.1 6.60 49.0 91 1.50 0.040 0.063 0.020 < 0.010 0.840 0.860 84 12.0 6.41 52.0 88 0.22 0.040 0.108 0.040 < 0.010 0.710 0.830 85 11.5 6.60 55.0 89 0.22 0.034 0.083 0.034 < 0.010 0.808 0.901 86 11.3 6.71 55.0 92 0.32 0.030 0.078 0.028 < 0.010 0.861 0.949 87 11.6 6.63 55.0 97 0.21 0.032 0.086 < 0.020 < 0.010 0.970 1.32 88 11.5 6.51 56.0 191 0.25 0.030 0.105 0.029 < 0.010 1.00 1.12 89 11.1 6.49 55.0 112 0.25 0.028 0.099 0.037 < 0.010 1.04 1.15 90 11.5 6.74 53.0 126 0.15 0.042 0.097 < 0.020 < 0.010 1.32 1.43 91 11.1 6.93 55.0 133 0.19 0.033 0.094 0.031 0.010 1.42 1.53 92 11.9 6.75 55.0 132 0.28 0.031 0.087 0.024 0.012 1.58 1.68 93 10.6 6.86 56.0 123 0.13 0.031 0.113 0.030 0.012 1.96 2.09 V - 94 11.6 6.63 57.0 124 0.24 0.028 0.070 0.023 0.011 2.36 2.45 95 10.9 6.69 59.0 112 0.20 0.050 0.094 0.030 0.010 2.44 2.54 96 12.1 6.56 59.0 111 0.17 0.031 0.109 0.021 0.011 2.93 3.05 97 11.7 6.44 60.0 105 0.21 0.029 0.116 0.021 0.011 3.07 3.20. 98 10.7 6.40 62.0 94 0.53 0.032 0.131 < 0.021 < 0.010 3.02 3.16 99 11.6 6.33 61.0 93 0.11 0.033 0.139 < 0.020 < 0.010 3.18 3.33 00 11.2 6.74 62.0 84 0.12 0.037 0.189 0.021 < 0.012 3.59 3.70 01 11.8 6.48 62.0 83 0.15 0.033 0.100 < 0.020 < 0.028 3.39 3.48 02 11.6 6.54 62.0 78 0.02 0.030 0.113 < 0.053 3.30 3.48 03 11.9 6.79 59.1 76 0.02 0.034 0.076 < 0.053 3.30 3.39 04 11.8 6.67 59.0 80 0.05 0.036 0.124 < 0.030 3.47 3.57 05 11.2 6.62 58.3 79 0.06 0.034 0.101 < 0.030 3.64 3.76 06 11.1 6.63 56.9 77 0.17 0.032 0.066 < 0.032 3.81 3.89 07 10.9 6.63 58.7 82 0.08 0.029 0.067 < 0.035 4.61 4.68 08 11.4 6.67 61.5 89 0.09 0.035 < 0.058 < 0.044 5.18 5.25 09 11.3 6.36 61.5 90 0.06 0.037 < 0.050 < 0.048 5.61 5.68 10 11.3 6.46 60.9 83 0.09 0.037 0.052 < 0.048 5.25 5.33 11 11.5 6.29 61.2 78 0.18 0.040 0.058 < 0.043 4.52 4.54 12 12.3 6.46 62.7 83 0.09 0.037 0.184 < 0.020 < 0.049 4.67 4.82 13 11.6 6.39 62.6 0.039 0.127 0.026 < 0.042 4.86 4.86 14 12.1 6.42 61.8 0.036 0.358 0.025 < 0.040 4.57 4.87 15 12.3 6.45 61.0 0.042 0.108 < 0.020 < 0.040 4.74 4.70 16 11.5 6.48 61.5 0.043 0.255 < 0.020 < 0.050 4.19 4.36 17 12.2 6.49 60.0 0.038 0.300 0.023 < 0.038 3.83 4.06 18 11.2 6.17 60.3 0.038 0.208 < 0.020 < 0.014 3.97 4.15 19 12.4 6.22 61.0 0.038 0.118 < 0.020 < 0.020 4.08 4.05 Maximum 12.4 6.93 62.7 133 1.50 0.050 0.358 0.040 0.053 5.61 5.68 Minimum 9.8 6.17 47.0 76 0.02 0.028 < 0.050 0.010 < 0.010 0.710 0.830 Average 11.5 6.54 58.0 96 0.21 0.035 0.119 0.025 0.025 2.97 3.09 #Tests 39 39 39 30 31 39 39 29 37 39 39 Site: GW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 81 171 238 35.0 1 < 5 3.9 < 2.2 82 187 256 3 5.0 < 2.2 83 155 252 38.0 1 5 < 2.2 < 2.2 84 172 247 34.0 1 < 5 < 2.2 < 2.2 85 171 250 32.9 1 < 5 2.6 < 2.2 86 175 255 38.5 2 < 5 2.3 < 2.2 87 188 270 35.8 3 < 5 < 2.2 < 2.2 88 208 310 41.6 5 < 5 < 2.2 < 2.2 89 213 316 42.4 5 < 5 < 2.0 < 2.0 90 233 348 48.2 < 5 < 5 < 2.0 < 2.0 91 251 357 50.8 5 < 5 3.2 < 2.0 92 250 366 49.9 < 5 < 5 3.2 < 2.0 93 245 356 44.6 < 5 < 5 2.3 < 2.0 94 240 365 49.8 < 5 4 4.6 < 2.0 95 222 336 40.0 7 < 5 2.0 < 2.0 96 209 326 37.8 2 5 3.0 1.2 97 194 304 33.9 4 5 1.6 1.0 98 186 291 30.1 < 5 < 5 < 1.1 < 1.1 99 181 279 26.6 < 5 < 5 1.6 1.1 00 174 268 23.6 < 5 10.8 < 5 < 1.1 < 1.1 01 167 256 23.6 < 5 13.1 < 5 1.1 1.1 02 166 251 22.8 < 5 12.2 < 5 < 1.1 < 1.1 03 164 245 24.4 6 11.8 < 5 < 1.1 < 1.1 04 168 252 26.3 < 5 11.7 < 5 < 1.1 < 1.1 05 172 238 28.1 < 5 11.8 < 5 < 1.1 < 1.1 06 174 241 29.5 < 6 11.3 < 5 < 1.1 < 1.1 07 189 281 32.9 < 5 11.8 5 < 1.1 < 1.1 08 195 308 34.3 < 5 12.1 5 < 1.1 < 1.1 09 197 305 34.2 < 5 11.9 5 < 1.1 < 1.1 10 195 296 31.3 11 12.4 < 5 < 1.1 < 1.1 11 183 280 27.7 6 11.8 < 5 < 1.1 < 1.1 12 183 278 28.2 11.7 < 5 < 1.1 < 1.1 13 188 285 29.0 11.5 < 1.1 < 1.1 14 184 283 28.3 11.2 < 1.1 < 1.1 15 187 287 29.6 11.9 7.3 < 1.0 16 178 277 27.3 11.0 < 1.0 < 1.0 17 169 252 23.5 10.1 < 1.0 < 1.0 18 173 266 25.4 9.8 < 1.0 < 1.0 19 174 265 25.6 9.4 < 1.3 < 1.0 Maximum 251 366 50.8 11 13.1 5 7.3 2.2 Minimum 155 238 22.8 1 9.4 4 < 1.0 1.0 Average 190 286 33.3 4 11.5 5 2.0 1.5 #Tests 39 39 38 31 20 31 39 39 0 Site GW-05 Nitrate-Nitrogen Chlorides 10 - -- - 100 9 - 90 8 - 80 7 70 6 60 E5 J- - £ 50 4 - - - 40 3 30 2 20 1 10 0 8182838485WS78889909192939495909796990001020304050607080910111213141510171819 0 81 W838485 Be 8788899091929304 959807989900010203 040506070809 10 11 12 13 14 15'16117 18 19 +Nitrate Linear(Nitrate) +Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Coliform Bacteria 500 25 400 — 20 - -- - - -- ----- J 300 - - - -- E 15 J O p� O E Iz 200 ---- a 10 - 100 -- - ---- 5 - - - 0 0 8182 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 0102 03 04 05 06 07 08 09 10 11 12 13 14 15 1617 1819 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 0102 03 04 05 08 07 08 0910 11 12 13 14 15 1017 1819 t TDS Linear(TDS) t Total Coliforns Linear(Total Coliforms) Annual Metal Report G W-05 Neddenriep Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/7/2006 19.0 3.55 6.56 18.9 <50 <2 <2 <10 <2 <2 <20 <50 <0.2 <20 <2 <2 <2.5 <10 <2 <1 2 60.6 6/12/2007 21.6 3.66 6.90 19.7 <20 <2 180 <1 13.8 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <5 <1 <1 5.1 72.2 6/18/2008 24.1 4.02 7.04 20.5 <20 <2 53 <1 <10 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <5 <1 <1 <3 68.4 6/9/2009 23.2 3.90 7.34 22.6 <20 <2 55 <1 <10 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <5 <1 <1 <3 55.6 6/8/2010 23.0 3.50 7.30 21.0 <20 <1 55 <1 <0.5 <0.5 <1 3.4 <20 <0.2 2 <2 <5 <0.5 <5 <1 <1 <3 55 6/1/2011 21.1 3.67 7.25 22.2 <20 <1 47.9 <1 <0.5 <0.5 <1 2.56 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 82.5 7/5/2012 17.3 3.62 6.12 20.4 <20 <1 47.8 <1 <10 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <5 <1 <1 44 6/11/2013 20.5 3.68 6.20 22.2 7/8/2014 20.8 3.65 6.64 23.7 <20 <1 49.0 <1 <0.5 <0.5 <1 2.41 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 3.38 43.5 8/18/2015 20.4 4.02 6.76 25.2 <20 <1 49.1 <1 <0.5 <0.5 <1 2.08 <20 <0.2 <2 <2 <5 0.52 <5 <1 <1 <3 77.9 8/16/2016 17.4 3.45 5.73 22.9 <20 <1 46.4 <1 <0.5 <0.5 <1 <2 <20 <0.2 <2 <2 <5 1.65 <5 <1 <1 3.14 123 6/8/2017 15.8 3.19 5.38 20.6 <20 <1 42.5 <1 <0.5 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 80 9/18/2018 17.5 3.07 5.45 22.0 <20 <1 42.3 <1 <0.5 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 6/6/2019 18.2 3.26 5.64 23.3 <20 <1 44.8 <1 <0.5 <0.5 <1 <2 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 44.2 Site: GW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/31/19 15.2 6.05 50.0 0.040 < 0.050 < 0.020 < 0.010 7.91 7.92 06/06/19 17.4 5.88 46.0 0.052 < 0.050 < 0.020 < 0.010 9.46 9.22 09/19/19 16.3 5.91 48.9 0.057 0.140 < 0.020 < 0.10 9.36 9.50 11/07/19 13.4 5.92 49.3 0.057 < 0.10 < 0.020 < 0.010 10.2 9.35 Maximum 17.4 6.05 50.0 0.057 0.140 < 0.020 < 0.10 10.2 9.50 Minimum 13.4 5.88 46.0 0.040 < 0.050 < 0.020 < 0.010 7.91 7.92 Average 15.6 5.94 48.6 0.052 0.085 < 0.020 < 0.033 9.23 9.00 #Tests 4 4 4 0 0 4 4 4 4 4 4 Site: GW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 01/31/19 208 318 39.5 12.5 < 1 < 1 06/06/19 213 337 46.7 13.3 < 1 < 1 09/19/19 208 334 33.9 11.8 < 1 < 1 11/07/19 215 349 42.7 12.2 < 1 < 1 Maximum 215 349 46.7 13.3 < 1 < 1 Minimum 208 318 33.9 11.8 < 1 < 1 Average 211 335 40.7 12.5 < 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: GW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2019 Temp Alk Hard Turb Total P TKN NH3-N NOz-N NO3-N Total N Year C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 81 11.4 6.42 39.0 0.80 0.040 0.116 0.020 1.280 1.340 82 9.5 6.30 42.0 0.060 0.134 0.020 1.790 1.920 83 9.9 6.42 48.0 99 1.32 0.030 0.063 0.020 < 0.010 1.530 1.600 84 11.2 6.38 49.0 88 1.69 0.090 0.138 0.030 < 0.010 1.240 1.390 85 10.0 6.50 46.0 84 0.81 0.049 0.107 0.028 < 0.010 1.081 1.198 86 10.9 6.48 47.0 106 1.50 0.039 0.090 0.020 < 0.010 1.313 1.413 87 12.7 6.56 45.0 100 1.67 0.055 0.141 < 0.021 < 0.010 1.340 1.844 88 13.9 6.57 45.0 102 1.40 0.039 0.152 0.030 < 0.010 1.536 1.698 89 10.9 6.54 46.0 121 5.22 0.081 0.104 0.024 < 0.010 2.638 2.752 90 12.0 6.79 48.0 103 2.38 0.045 0.102 0.020 < 0.010 3.414 3.525 91 11.7 7.01 52.0 86 0.95 0.074 0.125 0.033 < 0.010 2.937 3.072 92 12.1 6.76 54.0 85 0.31 0.038 0.121 0.023 0.010 3.711 3.842 93 11.8 6.95 57.0 72 0.73 0.041 0.125 0.024 0.011 4.054 4.189 94 11.7 6.78 57.0 68 0.54 0.032 0.100 0.028 0.010 4.505 4.615 95 12.2 6.66 58.0 60 2.32 0.050 0.090 0.030 0.010 5.500 5.600 96 13.3 6.52 59.0 58 1.09 0.057 0.207 0.020 0.011 6.526 6.743 97 11.6 6.51 58.0 59 0.51 0.048 0.139 0.020 0.011 6.586 6.738 98 11.5 6.48 57.0 46 1.31 0.048 0.163 < 0.021 < 0.010 4.617 4.791 99 12.0 6.35 51.0 42 0.54 0.044 0.111 < 0.020 < 0.010 3.996 4.117 00 12.1 6.77 52.0 48 1.40 0.073 0.198 0.021 < 0.012 5.176 5.295 01 12.5 6.47 50.0 48 3.43 0.073 0.125 0.028 < 0.033 5.142 5.246 02 11.9 6.54 49.0 55 0.36 0.058 0.212 < 0.051 6.282 6.645 03 12.4 7.06 47.6 49 36.70 0.077 0.084 < 0.045 5.266 5.383 04 13.0 6.70 50.1 53 4.92 0.113 0.149 < 0.043 5.715 5.872 05 12.3 6.53 49.5 60 2.65 0.046 0.096 < 0.047 7.136 7.218 06 12.3 6.45 51.2 62 8.84 0.056 0.168 < 0.067 9.035 9.060 07 13.4 6.26 51.7 60 2.50 0.041 0.089 < 0.091 9.036 9.171 08 13.8 6.46 52.1 55 0.71 0.074 < 0.058 < 0.088 7.759 7.873 09 13.9 6.19 48.5 58 4.74 0.061 < 0.050 < 0.068 7.118 7.210 10 12.9 6.31 48.1 55 0.34 0.069 0.064 < 0.060 6.949 7.180 11 14.0 6.20 49.6 57 0.66 0.045 0.072 < 0.052 7.376 7.279 12 14.9 6.24 49.3 62 0.16 0.046 < 0.051 < 0.020 < 0.063 7.544 7.656 13 14.5 6.20 47.5 0.050 0.652 0.027 < 0.069 7.984 8.275 14 14.7 6.22 47.1 0.049 0.052 0.024 < 0.071 6.683 6.377 15 14.2 6.24 45.6 0.047 0.295 < 0.020 0.055 7.675 7.400 16 13.8 6.35 47.2 0.046 0.138 < 0.020 < 0.080 9.765 9.173 17 14.9 6.29 47.0 0.054 0.103 < 0.023 < 0.070 7.955 7.768 18 13.3 5.92 48.9 0.045 0.143 < 0.020 < 0.021 6.938 7.028 19 15.6 5.94 48.6 0.052 0.085 < 0.020 < 0.033 9.233 8.998 Maximum 15.6 7.06 59.0 121 36.70 0.113 0.652 0.033 0.091 9.765 9.173 Minimum 9.5 5.92 39.0 42 0.16 0.030 < 0.050 0.020 < 0.010 1.081 1.198 Average 12.6 6.47 49.7 70 2.98 0.055 0.134 0.023 0.035 5.266 5.346 #Tests 39 39 39 30 31 39 39 29 37 39 39 Site GW-08 Nitrate-Nitrogen Chlorides 10 100 9 90 8 80 7 70 6 60 5 E 50 4 40 3 30 2 20 1 10 0 0 81828384858687888990919293949596979099 DO 01020304050007080910 11 12 13 14 15 16 17 18 19 818283848586878889009192 9394 9696070809000102030405060708 09 10 11 12 13 14 15 1617 1819 t Nitrate Linear(Nitrate) t Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Coliform Bacteria 500 25 - 400 20 - 300 E 15 J O � O 200 a 10 100 5 0 0 81 82 83 84 85 88 87 88 89 90 91 92 93 94 95 98 97 98 99 00 01 02 03 04 05 08 07 0809 10 11 12 13 14 15 1617 Is 19 8182 83 84 85 88 87 88 89 90 91 92 93 94 95 08 07 98 99 00 01 02 03 04 05 06 07 08 0910 11 12 13 14 15 1817 18 19 t TDS Linear(TDS) —+—Total Coliforms Linear(Total Coliforms) Annual Metal Report GW-08 Arant Ranch house Ca K Mg Na Ag Al As Ba Be Cd Cr Cu Fe Hg Mn Mo Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/7/2006 16.4 4.14 5.95 37.9 <10 <50 <2 <2 <2 <2 182 314 <0.2 <20 <2 2 <2.5 <2 <10 <1 <2 20 6/12/2007 15.7 4.00 -5.47 37.2 <10 <20 <2 47 <1 <0.5 <1 183 211 <0.2 31.4 <2 <5 <2.5 <1 <5 <1 <3 149 6/18/2008 16.4 4.12 5.02 35.7 <10 <20 <2 48 <1 <0.5 <1 <20 267 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 66.3 6/9/2009 14.0 3.79 4.80 33.7 <10 <20 <2 40 <1 <0.5 <1 21 105 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <3 18.3 6/8/2010 15.0 3.50 5.10 33.0 <0.5 <20 <1 41 <1 <0.5 <1 23 84 <0.2 2.1 <2. <5 1.1 <1 <5 <1 <3 <20 6/1/2011 15.6 3.75 5.77 37.5 <0.5 <20 <1 42.7 <1 <0.5 <1 77.8 490 <0.2 14 <2 <5 3.81 <1 <5 <1 <3 <20 7/5/2012 11.8 3.52 4.13 30.7 <10 <20 <1 34.8 <1 <0.5 <1 36.1 <50 <0.2 <20 <2 <5 <2.5 <1 <5 <1 <10 6/11/2013 14.4 3.84 4.70 35.1 7/8/2014 14.1 3.72 4.91 35.8 <0.5 <20 1.14 38.3 <1 <0.5 <1 13.9 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 3.32 68.1 8/18/2015 13.8 3.61 4.92 33.9 <0.5 <20 <1 4.1.0 <1 <0.5 <1 13.8 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 76.1 8/16/2016 14.3 3.58 5.12 34.4 <0.5 <20 <1 39.8 <1 <0.5 <1 5.67 <20 <0.2 <2 <2 <5 <0.5 <1 <5 <1 <3 75.9 6/8/2017 14.4 3.67 5.31 35.7 <0.5 <20 <1 45.4 <1 <0.5 <1 16.9 23.8 <0.2 2.63 <2 <5 <0.5 <1 <5 <1 <3 32 9/18/2018 15.5 3.47 5.10 34.6 <0.5 <20 <1 46.5 <1 <0.5 <1 45.3 23.8 <0.2 2.63 <2 <5 <0.5 <1 <5 <1 <3 6/6/2019 17.2 3.88 5.78 39.2 <0.5 <20 <1 52.1 <1 <0.5 <1 31.1 25.3 <0.2 2.63 <2 <5 <0.5 <1 <5 <1 <3 <20 Site: GW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Date C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 01/23/19 10.1 6.64 70.4 0.043 0.060 < 0.020 < 0.010 0.498 0.558 05/22/19 13.4 6.76 70.1 0.038 0.091 < 0.020 < 0.010 0.495 0.586 08/14/19 18.1 6.86 69.2 0.041 < 0.10 < 0.020 < 0.010 0.494 0.388 11/21/19 12.1 6.66 70.4 0.048 < 0.050 < 0.020 < 0.010 0.551 0.531 Maximum 18.1 6.86 70.4 0.048 0.091 < 0.020 < 0.010 0.551 0.586 Minimum 10.1 6.64 69.2 0.038 < 0.050 < 0.020 < 0.010 0.494 0.388 Average 13.4 6.73 70.0 0.043 0.075' < 0.020 < 0.010 0.510 0.516 #Tests 4 4 4 0 0 4 4 4 4 4 4 Site: GW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Fecal TDS EC Chloride COD SO4 Color Coll E.coli Strep Date mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 01/23/19 107 150 1.15 0.833 < 1 < 1 05/22/19 112 141 1.23 1.09 < 1 < 1 08/14/19 117 143 0.799 0.697 < 1 < 1 11/21/19 105 148 1.15 0.796 < 1 < 1 Maximum 117 150 1.23 1.09 < 1 < 1 Minimum 105 141 0.799 0.697 < 1 < 1 Average 110 146 1.08 0.854 < 1 < 1 #Tests 4 4 4 0 4 0 4 4 0 Site: GW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2019 Temp Alk Hard Turb Total P TKN NH3-N NOZ-N NO3-N Total N Year C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 81 11.0 6.60 42.0 0.040 0.030 0.020 0.570 0.600 82 10.2 6.34 41.0 0.040 0.056 0.020 1.290 0.960 83 9.9 6.53 43.0 60 0.15 0.040 0.058 0.020 < 0.010 1.100 1.130 84 9.9 6.32 44.0 38 0.33 0.030 0.085 0.030 < 0.010 0.490 0.580 85 10.5 6.49 46.0 37 0.31 0.031 0.055 0.023 < 0.010 0.500 0.565 86 9.9 6.63 46.0 36 0.19 0.032 0.053 0.022 < 0.010 0.588 0.646 87 10.3 6.74 45.0 35 0.11 0.028 0.069 < 0.020 < 0.010 0.370 0.582 88 10.1 6.47 46.0 35 0.17 0.029 0.070 0.033 < 0.010 0.308 0.388 89 11.0 6.60 46.0 35 0.16 0.027 0.048 0.023 < 0.010 0.522 0.580 90 10.7 7.09 43.0 39 0.18 0.035 0.063 0.020 < 0.010 0.336 0.409 91 11.5 7.04 44.0 34 1.76 0.034 0.072 0.027 0.010 0.268 0.350 92 12.4 6.83 46.0 34 0.28 0.030 0.063 0.022 < 0.011 0.325 0.399 93 11.3 6.94 40.0 32 0.14 0.037 0.091 0.026 0.011 0.213 0.314 94 12.3 6.66 41.0 33 0.30 0.023 0.070 0.023 0.010 0.206 0.286 95 12.3 6.66 39.0 30 0.55 0.030 0.269 0.210 0.010 0.250 0.530 96 13.5 6.46 42.0 34 0.33 0.028 0.094 0.025 0.011 0.386 0.491 97 13.6 6.57 45.0 38 0.13 0.029 0.094 0.021 0.011 0.524 0.631 98 14.0 6.24 47.0 39 0.45 0.026 0.117 < 0.021 < 0.010 0.421 0.549 99 14.8 6.23 46.0 40 0.14 0.022 0.108 < 0.020 < 0.010 0.402 0.602 00 13.4 6.98 58.0 48 0.26 0.027 0.114 0.021 < 0.010 0.408 0.480 01 15.0 7.07 77.0 57 0.12 0.048 0.131 < 0.020 < 0.010 0.454 0.600 02 14.5 7.05 77.0 56 0.02 0.058 0.178 < 0.010 0.454 0.638 03 14.9 7.25 74.2 56 0.08 0.047 0.073 < 0.010 0.482 0.536 04 14.0 7.23 73.0 56 0.08 0.054 0.110 < 0.010 0.505 0.624 05 14.9 7.10 73.9 56 0.22 0.040 < 0.083 < 0.010 0.469 0.558 06 15.0 7.11 72.0 51 0.13 0.044 < 0.079 < 0.010 0.483 0.577 07 16.2 7.23 73.8 51 0.08 0.042 0.084 < 0.010 0.475 0.527 08 16.2 7.26 74.4 55 0.40 0.044 0.060 < 0.010 0.475 0.511 09 13.2 6.99 72.8 56 0.19 0.049 < 0.050 < 0.010 0.512 0.547 10 13.3 7.24 72.7 53 0.09 0.050 0.051 < 0.010 0.516 0.590 11 14.0 6.96 72.3 54 0.24 0.042 0.082 < 0.010 0.454 0.426 12 13.7 7.11 72.1 56 0.26 0.044 0.049 < 0.020 < 0.010 0.526 0.555 13 14.8 7.04 71.7 0.056 < 0.050 0.027 < 0.009 0.491 0.499 14 13.7 7.00 70.9 0.047 0.056 0.027 0.010 0.503 0.496 15 13.5 6.97 71.2 0.047 < 0.050 < 0.020 < 0.010 0.520 0.514 16 14.5 6.76 70.9 0.053 < 0.063 < 0.020 < 0.010 0.477 0.480 17 14.5 7.19 71.7 0.056 < 0.075 < 0.020 < 0.010 0.472 0.402 18 13.6 6.89 69.1 0.045 < 0.063 < 0.020 < 0.013 0.478 0.475 19 13.4 6.73 70.0 0.043 0.075 < 0.020 < 0.010 0.510 0.516 Maximum 16.2 7.26 77.0 60 1.76 0.058 0.269 0.210 0.013 1.290 1.130 Minimum 9.9 6.23 39.0 30 0.02 0.022 0.030 0.020 0.009 0.206 0.286 Average 13.0 6.84 58.2 44 0.26 0.039 0.081 0.029 0.010 0.480 0.542 #Tests 39 39 39 30 30 39 39 29 37 39 39 Site: GW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 1981 To: 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strap Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 81 82 90 < 1 < 2.2 < 2.2 82 81 106 1 < 2.2 < 2.2 83 60 99 3.000 2 8 < 2.2 < 2.2 84 65 96 2.000 1 < 5 < 2.2 < 2.2 85 68 96 1.500 1 < 5 < 2.2 < 2.2 86 67 96 1.400 1 < 5 < 2.2 < 2.2 87 73 92 1.100 3 < 5 < 2.2 < 2.2 88 74 96 1.100 5 < 5 < 2.2 < 2.2 89 71 95 1.200 6 < 5 < 2.0 < 2.0 90 79 94 1.000 < 5 < 5 < 2.0 < 2.0 91 75 94 1.000 < 5 < 5 < 2.0 < 2.0 92 72 95 1.000 < 5 < 5 < 2.0 < 2.0 93 70 87 1.00 < 5 < 5 < 2.0 < 2.0 94 70 91 0.900 < 5 4 < 2.0 < 2.0 95 68 83 0.900 < 5 < 5 < 2.0 < 2.0 96 73 90 0.900 2 5 1.2 1.2 97 77 96 1.30 4 5 1.0 1.0 98 81 101 0.900 < 5 < 5 < 1.1 < 1.1 99 78 99 1.00 < 5 < 5 < 1.1 < 1.1 00 95 120 0.900 < 5 0.850 < 5 < 1.1 < 1.1 01 115 151 0.800 < 5 0.790 < 5 < 1.1 < 1.1 02 116 147 0.700 < 5 1.310 < 5 < 1.1 < 1.1 03 118 146 0.754 < 5 0.772 < 5 < 1.1 < 1.1 04 117 144 0.740 < 5 0.783 < 5 < 1.1 < 1.1 05 117 138 0.796 < 5 0.939 < 5 < 1.1 < 1.1 06 116 139 0.695 < 6 0.752 < 5 < 1.1 < 1.1 07 116 141 0.715 < 5 0.745 < 5 < 1.1 < 1.1 08 117 139 0.988 < 5 0.766 < 5 < 1.1 < 1.1 09 115 142 0.909 < 5 0.751 < 5 < 1.1 < 1.1 10 117 145 0.788 11 0.847 < 5 < 1.1 < 1.1 11 113 145 0.771 6 0.678 < 5 < 1.1 < 1.1 12 114 142 0.838 0.710 < 5 < 1.1 < 1.1 13 116 141 0.762 0.654 < < 1.1 < 1.1 14 113 145 0.953 0.747 < 1.1 < 1.1 15 118 147 1.01 0.722 7.2 < 1 16 117 149 0.971 0.774 < 1 < 1 17 118 142 1.02 0.740 < 1 < 1 18 120 140 1.06 0.970 < 1 < 1 19 110 146 1.08 0.854 < 1 < 1 Maximum 120 151 3.000 11 1.310 8 7.2 2.2 Minimum 60 83 0.695 < 1 0.654 4 < 1 < 1 Average 94 119 1.039 4 0.808 5 1.6 1.5 #Tests 39 39 37 31 20 30 39 39 0 Site GW-11 Nitrate-Nitrogen Chlorides 5 --- -------.._ - 50 4 40 - 3 - - 30 -- J J tT E E 2 20 -- 1 -- - 10 0 8182038485958788899091 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 1617 18 19 0 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 0910 11 12 1314 151617 1819 +Nitrate Linear(Nitrate) t Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Coliform Bacteria 500 25 -- 400 - _ _ - - - -- - 20 - -- - 300 - - E 15 -- -- -- --- J O � O 200 a 10 100 5 - - - - - - - - - - - - - - I 1 0 0 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 9198 99 00 0102 03 04 05 06 07 08 09 10 11 12 13 14 1518171819 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 0102 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 t TDS Linear(TDS) t Total Coliforms Linear(Total Coliforms) Annual Metal Report GW-11 Diamond Valley School Ca K Mg Na Ag AI As Ba Be Cd Cr Cu Fe Hg Mn MO Ni Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 6/7/2006 12.6 1.48 4.32 10.1 <50 <2 <2 <10 <2 <2 30.2 83.3 <0.2 <20 <2 <2 <2.5 <10 <2 <1 2 95 6/12/2007 13.4 1.59 4.86 9.13 <20 <2 31 <1 <10 <0.5 <1 40.2 <50 <0.2 <20 <2 <5 <2.5 <5 <1 <1 <3 85.8 6/18/2008 15.4 1.62 4.59 10.2 <20 <2 34 <1 <10 <0.5 <1 <20 <50 <0.2 <20 <2 <5 <2.5 <5 <1 <1 <3 52.8 6/9/2009 13.4 1.51 4.94 9.83 <20 <2 32 <3 <10 <0.5 <1 28 <50 <0.2 <20 <2 <5 <2.5 <5 <1 <1 <3 47.7 6/8/2010 14.0 1.50 5.20 10.0 <20 <1 32 <1 <0.5 <0.5 1.1 11 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 45 6/1/2011 13.6 1.64 5.35 8.99 <20 <1 28.6 <3 <0.5 <0.5 <1 23.7 <20 <0.2 <2 <2 <5 0.868 <5 <1 <3 <3 92.7 7/5/2012 12.3 1.59 4.34 8.72 <20 <1 31.2 <1 <10 <0.5 <1 81.9 <50 <0.2 <20 <2 <5 <2.5 <5 <1 <1 59.3 6/18/2013 12.5 1.44 4.14 9.23 6/17/2014 13.6 1.63 5.01 9.79 <20 <1 35.1 <1 <0.5 <0.5 <1 33.1 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 60.7 7/15/2015 14.1 1.58 5.07 9.25 <20 <1 29.4 <1 <0.5 <0.5 <1 17.6 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 51.1 8/10/2016 13.1 1.52 4.85 8.64 <20 <1 29.3 <1 <0.5 <0.5 <1 22 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 44.8 7/27/2017 12.6 1.55 4.54 8.01 <20 <1 28.6 <1 <0.5 <0.5 <1 21 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 30.9 8/29/2018 13.4 1.31 4.80 9.00 <20 <1 30.6 <1 <0.5 <0.5 <1 28.6 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 42.1 8/14/2019 13.2 1.38 4.66 8.74 <20 <1 30.6 <1 <0.5 <0.5 <1 22.7 <20 <0.2 <2 <2 <5 <0.5 <5 <1 <1 <3 33.0 Site: GW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT GW-17 ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N TDS EC Date C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L mg/L umhos 1/23/2019 15.3 6.68 64.4 0.013 0.197 0.102 < 0.020 < 0.020 0.197 70 140 5/22/2019 9.5 6.63 60.2 0.026 0.141 < 0.020 < 0.010 0.869 1.01 103 128 8/14/2019 12.5 6.42 61.3 0.030 < 0.10 < 0.020 < 0.020 0.801 0.660 109 137 11/21/2019 10.9 6.38 66.0 < 0.010 0.184 < 0.020 < 0.010 0.090 0.274 90 136 Maximum 15.3 6.68 66.0 0.030 0.197 0.102 < 0.020 0.869 1.01 109 140 Minimum 9.5 6.38 60.2 < 0.010 < 0.10 < 0.020 < 0.010 < 0.020 0.197 70 128 Average 12.1 6.53 63.0 0.020 0.156 0.041 < 0.015 0.445 0.535 93 135 #Tests 4 4 4 0 0 4 4 4 4 4 4 4 4 Site: SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA 2019 Total Fecal Chloride COD SO4 Color Coli E.coli Strep Date mg/L mg/L mg/L Units MPN MPN MPN Comments 1/23/2019 2.05 < 0.50 < 1 < 1 5/22/2019 1.74 1.20 < 1 < 1 8/14/2019 1.68 0.992 < 1 < 1 11/21/2019 1.60 0.588 < 1 < 1 Maximum 2.05 1.20 < 1 < 1 Minimum 1.60 < 0.50 < 1 < 1 Average 1.77 0.82 < 1 < 1 #Tests 4 0 4 0 4 4 0 Site: GW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2014 To: 2019 Temp Alk Hard Turb Total P TKN NH3-N NO2-N NO3-N Total N Year C pH mg/L mg/L NTU mg/L mg/L mg/L mg/L mg/L mg/L 14 13.6 6.52 66.5 0.023 0.064 0.038 < 0.010 0.417 0.445 15 13.1 6.55 66.2 0.019 0.057 0.022 < 0.010 0.667 0.607 16 13.2 6.48 66.8 0.027 0.080 0.032 < 0.010 0.407 0.433 17 14.6 6.63 68.0 0.029 0.107 0.034 < 0.010 0.365 0.394 18 12.6 6.45 63.9 0.023 0.063 0.033 < 0.015 0.752 0.718 19 12.1 6.53 63.0 0.020 0.156 0.041 < 0.015 0.445 0.535 Maximum 14.6 6.63 68.0 0.029 0.156 0.041 < 0.015 0.752 0.718 Minimum 12.1 6.45 63.0 0.019 0.057 0.022 < 0.010 0.365 0.394 Average 13.2 6.53 65.7 0.023 0.088 0.033 < 0.012 0.509 0.522 #Tests 6 6 6 0 0 6 6 6 6 6 6 Site: GW-17 SOUTH TAHOE PUBLIC UTILITY DISTRICT ALPINE COUNTY GROUNDWATER QUALITY DATA From 2014 To: 2019 Total Fecal/ Fecal TDS EC Chloride COD SO4 Color Coli E.coli Strep Year mg/L umhos mg/L mg/L mg/L Units MPN MPN MPN Comments 14 111 147 3.55 1.74 < 1.1 < 1.1 Well installed in 2014 15 110 150 2.25 1.71 < 1 < 1 16 107 156 2.13 1.33 < 1 < 1 17 102 140 1.82 1.10 < 1 < 1 18 104 141 1.89 1.98 < 1 < 1 19 93 135 1.77 0.82 < 1 < 1 Maximum 111 156 3.55 1.98 < 1.1 < 1.1 Minimum 93 135 1.77 0.82 < 1 < 1 Average 104 145 2.23 1.45 < 1 < 1 #Tests 6 6 6 0 6 0 6 6 0 Site GW-17 Nitrate-Nitrogen Chlorides 5 - 50 4 40 - 3 30 J J Im 2 -- - £ 20 1 10 P • 0 14 15 16 17 18 19 0 14 15 16 17 18 19 +Nitrate Linear(Nitrate) —Chloride Linear(Chloride) Total Dissolved Solids (TDS) Total Coliform Bacteria 500 - _ - 25 400 20 - - J 300 - - -- ---- -- E 15 - J � m O E 200 a 10 -- 100 5 0 0 14 15 16 17 18 19 14 15 16 17 18 19 t TDS Linear(TDS) +Total Coliforms Linear(Total Coliforms) Annual Metal Report GW-17 Diamond Valley Ranch House Well Ca K Mg Na Ag AI As Ba Be Cd Cr Cu Fe Hg Mn Mo NI Pb Sb Se TI V Zn mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 9/30/2013 12.0 1.80 3.30 11.0 480 <2 52 <2 <2 <2 <2 <2 360 0.2 37 <2 <2 <10 <2 1 <2 100 10/1/2013 19.0 6.00 8.00 32.0 17000 2 500 2 <2 <2 7 46 16000 <0.1 790 6 22 <10 2 <1 14 220 10/2/2013 17.0 1.50 4.70 15.0 2400 <2 64 <1 <2 <2 <2 6 880 <0.1 44 <2 <2 <10 <2 <1 <2 250 10/23/2013 1380 10/25/2013 98.2 8/12/2014 12.6 1.82 3.51 11.2 <20 <1 47.3 <1 <0.5 <0.5 <1 6.68 374 <0.2 10.5 <2 <5 0.98 <5 <1 <1 <3 532 7/15/2015 12.3 1.75 3.32 9.54 <20 <1 43.4 <1 <0.5 <0.5 <1 <10 206 <0.2 12.6 <2 <5 <0.5 <5 <1 <1 <3 521 11/18/2015 10500 8/10/2016 11.8 1.66 3.39 9.33 <20 <1 45 <1 <0.5 <0.5 <1 5.09 196 <0.2 4.45 <2 <5 <0.5 <5 <1 <1 <3 239 7/27/2017 11.5 1.58 3.2 8.81 <20 <1 43.9 <1 <0.5 <0.5 <1 3.1 284 <0.2 4.88 <2 <5 <0.5 <5 <1 <1 <3 120 8/29/2018 12.8 1.48 3.48 9.52 <20 <1 48 <1 <0.5 <0.5 <1 3.48 86.7 <0.2 5.53 <2 <5 <0.5 <5 <1 <1 <3 83.7 8/14/2019 12.6 1.56 3.38 9.49 <20 <1 46.5 <1 <0.5 <0.5 <1 3.07 111 <0.2 7.77 <2 <5 <0.5 <5 <1 <1 <3 134 ALPINE COUNTY SURFACEWATERS Site: SW-01 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson R Woodfords ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH,N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L m /L mg/L mg/L m /L mg/L mg/L mg/L mg/L 01/03/19 0.6 7.55 37.9 0.76 0.2 57 82.7 1.92 0.014 0.016 0.062 < 0.020 < 0.010 0.017 02/07/19 0.5 7.74 37.2 1.1 1.08 69 92 3.88 0.013 0.136 0.109 < 0.020 < 0.010 0.027 03/04/19 1.7 6.84 34.2 0.76 1.05 68 82 4.70 0.019 < 0.010 0.107 < 0.020 < 0.010 0.013 04/01/19 2.7 6.98 31.7 1.5 2.92 56 84.6 5.28 0.017 0.014 0.160 < 0.020 < 0.010 0.012 05/08/19 3.3 6.65 19.6 4.4 NV 38 37 0.965 0.036 0.014 0.253 < 0.020 < 0.010 < 0.010 06/04/19 9.2 7.85 19.5 7.8 14.6 32 37.0 0.520 0.040 < 0.015 0.110 < 0.020 < 0.010 0.017 07/09/19 10.7 7.67 21.8 1.4 3.92 31 49.5 0.593 0.019 0.019 0.124 < 0.020 < 0.010 < 0.010 08/08/19 13.2 6.99 30.0 0.81 1.90 46 61 0.700 0.017 < 0.010 0.110 < 0.020 < 0.010 < 0.010 09/04/19 15.1 7.62 31.0 0.60 1.1 47 68.0 0.711 0.017 < 0.010 0.173 < 0.020 < 0.010 < 0.010 10/03/19 5.2 7.02 33.2 1.3 1.56 51 67 0.820 0.018 0.010 0.117 < 0.020 < 0.010 < 0.010 11/05/19 3.0 7.37 36.1 0.68 0.38 53 70 0.949 0.013 0.012 < 0.100 < 0.020 < 0.010 < 0.010 12/03/19 1.5 7.73 36.1 0.88 0.46 61 71 1.60 0.015 < 0.010 0.070 < 0.020 < 0.010 < 0.010 Maximum 15.1 7.85 37.9 7.80 14.6 69 92 5.28 0.040 0.136 0.253 < 0.020 < 0.010 0.027 Minimum 0.5 6.65 19.5 0.60 0.20 31 37 0.52 0.013 < 0.010 = 0.100 < 0.020 < 0.010 < 0.010 Average 5.6 7.33 30.7 1.83 2.65 51 67 1.89 0.020 0.023 0.125 < 0.020 < 0.010 0.013 #Tests 12 12 12 12 11 12 12 12 12 12 0 0 12 12 12 12 Site: SW-01 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson R Woodfords ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Oil& Coliforms Fecal <----------Blue Green Algae--------->Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E.coli Strep Colonies Filaments Filamament:Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 01/03/19 0.079 40.4 < 1 11.9 2.35 02/07/19 0.136 46.2 < 1 12.1 2.50 03/04/19 0.120 83.9 6.3 11.3 2.38 04/01/19 0.172 131 < 1 11.0 2.39 05/08/19 0.253 58.3 < 1 12.3 1.28 06/04/19 0.127 131 2.0 10.2 0.793 07/09/19 0.124 249 5.2 9.20 0.921 08/08/19 0.110 365 4.1 8.08 1.18 09/04/19 0.173 548 5.2 8.45 1.14 10/03/19 0.117 325 7.4 8.45 1.72 11/05/19 < 0.100 70.6 2.0 10.9 1.68 12/03/19 0.070 111 1.0 11.8 1.61 Maximum 0.253 548 7.4 0 0 0 0 0 0 0 12.3 2.50 Minimum 0.070 40.4 < 1 0 0 0 0 0 0 0 8.08 0.79 Average 0.132 180 3.1 10.47 1.66 #Tests 12 0 0 0 0 0 0 0 0 12 12 0 0 0 0 0 0 0 0 12 12 0 Site: SW-01 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson R Woodfords ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2019 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 81 8.1 7.70 32 0.68 2 56 71 1.3 0.02 0.01 1.30 0.17 0.04 0.37 5 1 1 82 5.2 7.58 25 1.70 6 46 54 0.02 0.01 0.92 0.09 0.02 0.17 6 1 < 1 83 6.1 7.67 27 2.07 7 46 56 0.5 0.02 0.02 1.03 0.13 0.02 < 0.01 0.02 0.17 5 1 < 1 84 5.7 7.40 30 1.60 5 49 58 0.7 0.03 0.03 1.15 0.22 0.07 < 0.01 0.01 0.24 7 1 < 1 85 5.8 7.69 33 1.20 3 48 65 0.7 0.02 0.29 1.27 0.14 0.03 < 0.01 0.02 0.17 4 1 < 1 86 4.7 7.64 27 1.49 5 51 57 0.8 0.03 0.02 1.10 0.13 0.03 < 0.01 0.02 0.16 4 1 < 1 87 6.8 7.18 35 0.66 2 55 73 0.8 0.02 0.01 1.45 0.15 0.03 < 0.01 0.01 0.17 4 1 < 1 88 7.0 7.07 35 0.73 2 56 75 1.0 0.01 0.30 1.29 0.15 0.03 < 0.01 0.02 0.18 5 1 < 1 89 5.7 7.57 30 1.49 5.5 49 71 1.3 0.02 0.02 1.87 0.16 0.03 < 0.01 0.03 0.20 7 1.1 < 1 90 7.4 7.68 33 0.97 4.2 53 80 1.1 0.02 0.01 0.02 1.34 0.11 0.02 < 0.01 0.02 0.15 5 1.0 < 1 91 7.8 7.71 33 1.37 5.2 53 75 1.2 0.03 0.01 0.02 1.32 0.13 0.03 0.01 0.03 0.17 9 1.1 < 1 92 8.0 7.99 34 0.90 2.3 58 81 1.2 0.02 0.01 0.02 1.27 0.14 0.03 0.01 0.02 0.17 8 1.3 1 93 6.2 7.95 30 1.67 5.8 53 68 1.4 0.03 0.01 0.02 1.20 0.33 0.03 0.01 0.03 0.36 11 1.4 < 1 94 6.4 7.61 34 0.71 2.1 56 78 1.1 0.02 0.01 0.02 1.35 0.19 0.03 0.01 0.01 0.21 < 5 1.0 1 95 5.3 7.52 27 1.68 10.8 49 64 1.2 0.03 0.01 0.02 1.23 0.20 0.04 0.01 0.02 0.23 8 1.3 1 96 6.5 7.47 28 1.11 4.8 53 61 1.0 0.02 0.01 0.01 1.20 0.21 0.02 0.01 0.04 0.26 6 1.1 1 97 6.0 7.24 29 0.83 2.1 49 62 1.0 0.07 0.01 0.01 1.21 0,19 0.05 0.01 0.09 0.29 5 1.0 4 98 5.1 6.87 29 1.28 4.4 49 62 1.3 0.03 0.01 0.02 1.21 0.18 0.03 0.01 0.03 0.22 5 1.0 < 1 99 5.9 7.17 29 0.68 2.7 53 70 1.4 0.02 < 0.01 0.01 1.33 0.17 0.03 < 0.01 0.03 0.21 < 5 1.1 00 5.8 7.24 31 1.60 9.1 54 61 1.3 0.03 0.01 0.02 1.32 0.20 0.02 < 0.01 0.01 0.22 5 1.2 01 6.3 7.10 33 1.42 3.8 56 72 1.4 0.02 0.02 0.01 1.41 0.16 0.02 < 0.01 0.01 0.19 15 1.1 02 5.6 7.38 32 1.48 2.8 57 70 1.7 0.02 0.01 0.01 1.30 0.24 0.03 < 0.01 0.02 0.26 5 0.7 03 5.1 7.48 31 5.09 10.9 54 67 1.7 0.02 0.01 0.02 1.29 0.18 0.03 0.01 0.02 0.21 6 0.9 04 5.4 7.25 31 4.28 9.5 55 66 1.8 0.03 0.02 0.02 1.28 0.16 0.04 0.01 0.02 0.18 9 0.8 05 4.9 7.35 32 2.13 5.7 57 55 2.2 0.02 0.01 0.02 1.26 0.15 0.02 < 0.01 0.03 0.19 12 1.2 06 5.1 7.06 26 2.94 6.3 49 40 1.4 0.02 0.01 0.02 1.10 0.11 0.03 < 0.01 0.02 0.13 10 1.2 07 6.7 7.28 31 1.77 3.8 57 65 1.4 0.01 0.01 0.01 1.36 0.25 0.02 < 0.01 0.02 0.28 9 1.1 08 5.8 7.87 32 1.44 2.4 54 69 1.6 0.01 0.01 0.01 1.33 0.14 < 0.02 < 0.01 0.01 0.17 9 1.0 09 5.0 7.43 31 3.17 4.4 54 66 1.3 0.02 0.01 0.01 1.27 0.17 < 0.02 < 0.01 0.01 0.19 8 0.9 10 4.5 7.34 30 2.68 5.1 53 66 1.3 0.02 0.01 < 0.01 1.30 0.09 < 0.02 < 0.01 0.01 0.12 12 1.8 11 4.1 7.53 29 3.22 5.9 53 59 1.0 0.02 0.01 0.01 1.16 0.09 < 0.04 < 0.01 0.03 0.12 7 1.3 12 5.8 6.98 34 1.56 2.5 56 70 1.1 0.02 0.01 0.01 1.42 0.13 0.02 < 0.01 0.01 0.16 1.4 13 5.8 6.91 32 1.54 2.7 53 67 1.1 0.02 0.01 0.01 1.20 0.14 0.03 < 0.01 0.01 0.14 1.1 14 5.8 7.27 35 1.06 2.7 58 78 1.3 0.02 0.01 0.01 1.38 0.12 0.03 < 0.01 0.01 0.12 1.1 15 6.5 6.78 35 1.22 2.3 58 76 1.2 0.02 0.01 0.01 1.34 0.12 0.02 < 0.01 0.01 0.12 16 5.5 6.96 30 2.24 5.6 57 66 1.4 0.03 0.01 1.23 0.14 0.02 < 0.01 0.03 0.17 17 5.6 7.10 28 2.57 6.0 51 58 1.0 0.03 0.01 1.04 0.14 0.02 < 0.01 0.01 0.15 18 6.7 7.50 33 1.35 2.4 54 67 1.1 0.03 0.01 0.27 0.02 < 0.01 0.01 0.28 19 5.6 7.33 31 1.83 2.7 51 67 1.9 0.02 0.02 0.12 < 0.02 < 0.01 0.01 0.13 Maximum 8.1 7.99 35 5.09 10.9 58 81 2.2 0.07 0.02 0.30 1.87 0.33 0.07 0.01 0.09 0.37 15 1.8 4 Minimum 4.1 6.78 25 0.66 2.0 46 40 0.5 0.01 < 0.01 0.01 0.92 0.09 0.02 < 0.01 0.01 0.12 4 0.7 < 1 Average 5.9 7.38 31 1.73 4.6 53 66 1.2 0.02 0.01 0.03 1.27 0.16 0.03 0.01 0.02 0.20 7 1.1 1 #Tests 39 39 39 39 39 39 39 38 39 30 35 37 39 39 37 37 39 31 34 18 Site: SW-01 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson R Woodfords ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2019 Coliforms Fecal/ Fecal <------------------Blue Green Algae-------------------------> Single Hard- Ca Mg Na SAR Na Total E.coli Strep <-----Colonies----> <----Filaments-----> <-Filamaments---> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 81 307 226 184 23 208 27 221 8 487 3 82 123 38 31 16 77 50 731 17 445 26 83 260 135 47 22 427 92 1,015 35 790 22 9.87 < 0.01 25 84 6.02 1.71 2.71 0.25 19.7 419 55 48 293 4 61 970 226 2,220 52 9.38 1.17 25 85 6.89 1.84 3.11 0.27 20.1 165 45 48 0 0 286 43 196 10 0 9.92 0.73 27 86 5.80 1.64 2.55 0.24 19.4 175 43 100 0 0 45 92 92 3 69 10.42 9.57 23 87 7.31 2.03 3.54 0.29 21.1 140 74 37 0 0 46 623 139 3 27,077 9.78 4.88 27 88 7.86 2.20 3.69 0.29 20.7 294 < 30 43 0 0 0 0 1,085 54 0 11.71 3.61 89 6.76 1.82 2.93 0.25 18.7 271 48 285 0 0 0 0 439 22 231 10.23 3.82 90 7.51 2.05 3.48 0.29 20.5 163 50 156 0 0 0 0 0 0 0 9.25 3.97 25 91 7.36 2.00 3.43 0.28 20.7 153 37 40 0 0 6 115 0 0 0 8.94 4.08 23 92 8.12 1.98 3.58 0.28 20.3 164 26 130 0 0 0 0 0 0 0 9.88 4.16 26 93 7.22 1.88 3.33 0.28 20.4 176 41 40 0 0 15 50 0 0 0 10.02 3.86 22 94 7.58 1.95 3.82 0.31 22.2 118 32 37 0 0 0 4 0 0 0 9.94 4.70 25 95 6.58 1.81 3.28 0.28 21.4 73 31 35 0 0 0 33 0 0 0 10.24 4.32 21 96 6.38 1.68 3.11 0.27 21.4 142 33 35 0 0 0 0 0 0 0 10.56 2.34 22 97 6.63 1.83 3.30 0.29 21.7 75 30 130 0 0 0 0 0 0 0 10.75 2.81 25 98 6.20 1.68 3.14 0.28 21.9 67 31 60 0 0 29 179 0 0 0 9.44 2.27 19 99 6.60 1.81 3.47 0.31 22.5 110. 32 130 0 0 3 29 0 0 0 10.10 2.37 00 5.92 1.84 3.46 0.32 23.7 38 < 28 < 30 0 0 0 0 0 0 0 10.24 2.30 01 7.20 1.97 3.84 0.32 23.0 44 16 < 30 0 0 0 0 0 0 0 9.58 2.02 02 6.93 1.90 3.86 0.33 23.7 37 9 107 0 0 4 113 0 0 0 9.37 2.15 03 6.91 1.90 3.63 0.31 22.7 65 21 21 0 0 0 0 0 0 0 10.06 2.04 04 6.70 1.92 3.54 0.31 22.4 60 5 22 0 0 0 0 0 0 0 9.93 1.99 05 7.01 1.87 3.55 0.30 22.0 26 11 8 0 0 94 782 0 0 0 10.74 2.09 06 5.98 1.64 3.08 0.28 22.2 119 54 < 3 0 0 0 0 0 0 0 10.24 1.39 07 7.19 1.93 3.84 0.32 22.9 23 6 < 26 0 0 0 0 0 0 0 9.59 1.85 08 7.27 1.90 3.79 0.32 22.7 40 4 117 0 0 0 0 0 0 0 10.30 2.32 09 7.08 1.87 3.58 0.31 22.2 244 16 4 0 0 0 0 0 0 0 10.14 2.03 10 6.92 1.90 3.44 0.30 21.6 228 32 < 3 0 0 3 85 0 0 0 9.28 1.99 11 6.27 1.70 3.12 0.28 21.6 70 22 4 0 0 3 28 0 0 0 10.' 0 52 1.38 12 7.40 1.94 3.71 0.31 21.9 63 14 6 0 0 0 0 0 0 0 9.67 1.90 13 7.33 1.80 3.46 0.29 21.4 480 10 4 0 0 0 0 0 0 0 10.52 2.25 14 7.84 2.03 4.05 0.33 22.8 518' 25 4 0 0 0 0 0 0 0 9.75 2.18 15 8.28 2.08 3.96 0.32 21.8 588 7 10.44 2.22 16 7.27 1.81 3.55 0.30 21.9 330 3 11.69 1.94 17 6.53 1.70 3.06 0.27 21.1 218 5 10.52 1.29 18 345 4 10.31 1.67 19 180 3 10.47 1.66 Maximum 8.28 2.20 4.05 0.33 23.7 588 226 285 293 427 286 1,015 1,085 2,220 27,077 11.71 9.57 27 Minimum 5.80 1.64 2.55 0.24 18.7 23 3 3 0 0 0 0 0 0 0 8.94 < 0.01 19 Average 6.97 1.87 3.44 0.29 21.6 182 34 59 10 21 22 150 66 119 808 10.10 2.63 24 #Tests 34 34 34 34 34 39 39 34 34 34 34 34 34 34 34 37 37 14 Site : SW-01 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 - 0.4 0.4 0.3 0.3 J J E E 0.2 0.2 0.1 0.1 - 0.0 0.0 o" 0 0'` 0 0 eh eA 0 o'` 0 cP (51 c4 NN , .y NA N% e`' e'` � o° o"' cP o� da ^` +Nitrate Linear(Nitrate) Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 250 9 8 200 7 6 150 J J a► 5 E 4 E 100 3 2 50 - 1 0 0 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 06 09 1011 12 13 14 15 16 17 18 19 e� 00 eh ¢A a°j c a' a`' abA e°' O° o'' (Z°' OA O°' N5 h N N:5 +Chlorides Linear(Chlorides) +TDS Linear(TDS) Site: SW-02 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek, Upper ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 03/04/19 1.8 7.07 29.9 2.5 0.68 51 68 4.12 0.035 0.017 0.168 < 0.020 < 0.010 < 0.010 04/01/19 5.6 7.37 33.9 2.2 0.97 62 70.5 1.74 0.022 0.015 0.195 < 0.020 < 0.010 < 0.010 05/08/19 10.1 7.49 46.6 2.5 NV 73 86 1.05 0.027 0.015 0.238 < 0.020 < 0.010 < 0.010 06/04/19 12.2 7.61 48.4 2.9 2.85 77 90.5 0.586 0.024 0.016 0.124 < 0.020 < 0.010 0.013 07/09/19 12.9 7.53 44.6 2.2 1.28 72 93.7 0.580 0.022 < 0.010 0.128 < 0.020 < 0.010 < 0.010 08/08/19 14.9 7.34 57.2 3.8 0.47 79 107 0.792 0.023 < 0.010 0.130 < 0.020 < 0.010 < 0.010 09/04/19 15.0 7.72 58.4 4.2 1.0 88 134 0.687 0.048 < 0.010 0.195 < 0.020 < 0.010 < 0.010 10/03/19 6.7 6.01 52.0 2.5 0.43 77 95 0.689 0.017 < 0.010 0.079 < 0.020 < 0.010 < 0.010 11/05/19 5.4 7.72 28.0 3.0 0.85 69 121 0.719 0.024 0.015 0.107 < 0.020 < 0.010 < 0.010 Maximum 15.0 7.72 58.4 4.2 2.85 88 134 4.12 0.048 0.017 0.238 < 0.020 < 0.010 0.013 Minimum 1.8 6.01 28.0 2.2 0.43 51 68 0.580 0.017 < 0.010 0.079 < 0.020 < 0.010 < 0.010 Average 9.4 7.32 44.3 2.9 1.07 72 96 1.22 0.027 0.013 0.152 < 0.020 < 0.010 0.010 #Tests 9 9 9 9 8 9 9 9 9 9 0 0 9 9 9 9 Site: SW-02 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek, Upper ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Oil & Coliforms Fecal <-----Blue Green Algae----> Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filament.,Filamar Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 03/04/19 0.168 73.8 < 1 11.7 0.622 04/01/19 0.195 64.4 2.0 10.1 0.697 05/08/19 0.238 228 58.6 9.13 0.735 06/04/19 0.137 816 64.5 8.59 < 0.50 07/09/19 0.128 517 90.6 8.37 < 0.50 08/08/19 0.130 1,410 236 6.11 < 0.50 09/04/19 0.195 1,050 548 7.26 < 0.50 10/03/19 0.079 365 38.4 7.67 < 0.50 11/05/19 0.107 205 13.4 10.4 0.609 Maximum 0.238 1,410 548 0 0 0 0 0 0 0 11.71 0.74 Minimum 0.079 64 < 1 0 0 0 0 0 0 0 6.11 < 0.50 Average 0.153 525 117 8.82 < 0.57 #Tests 9 0 0 0 0 0 0 0 0 9 9 0 0 0 0 0 0 0 0 9 9 0 Site: SW-02 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO'-P Boron K TKN NH3-N NOZ-N NO3-N Total N COD Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 81 13.8 7.33 54 6.50 3 109 162 1.8 0.05 0.01 1.94 0.41 0.10 0.60 9 82 83 8.6 7.56 39 5.13 3 72 69 0.7 0.02 0.04 1.40 0.25 0.05 <0.01 0.01 0.18 8 84 8.4 7.71 40 2.36 6 64 76 0.8 0.03 0.02 1.48 0.49 0.05 <0.01 <0.01 0.51 9 85 86 87 5.2 7.55 48 2.20 1 70 80 1.1 0.02 <0.01 1.50 0.17 <0.02 <0.01 0.02 0.22 6 88 6.3 6.90 46 1.97 1 81 92 .1.2 0.02 0.01 1.25 0.19 0.03 <0.01 0.01 0.20 9 89 5.9 7.47 44 2.86 2.0 79 94 1.3 0.02 0.02 1.30 0.20 0.02 <0.01 0.02 0.23 9 90 4.5 7.42 44 2.82 2.0 77 108 1.1 0.02 0.01 1.32 0.14 0.02 <0.01 0.01 0.17 8 91 7.9 8.10 47 4.90 2.3 81 106 1.7 0.03 0.01 0.01 1.57 0.25 0.03 0.01 0.01 0.28 9 92 9.0 7.52 54 4.01 4.3 90 105 1.4 0.05 0.01 0.02 1.51 0.28 0.03 0.01 0.02 0.31 9 93 8.7 7.51 44 3.06 1.1 80 93 1.8 0.04 0.02 0.02 1.64 0.36 0.02 0.01 0.02 0.39 24 94 5.5 7.14 47 3.09 1.0 79 97 1.4 0.03 0.01 0.02 1.37 0.26 0.02 0.01 0.02 0.29 <5 95 8.4 7.63 44 2.51 1.4 79 90 1.4 0.03 0.02 0.01 1.48 0.28 0.05 0.01 0.02 0.31 8 96 9.5 7.45 52 3.37 2.9 82 104 1.9 0.04 0.01 0.01 1.79 0.32 0.02 0.01 0.03 0.36 7 97 8.2 7.43 57 4.38 13.2 86 111 0.9 0.06 0.01 0.02 1.70 0.32 0.02 0.01 0.10 0.43 9 98 7.5 7.30 55 2.35 2.2 85 109 1.0 0.03 0.01 0.01 1.58 0.26 0.02 <0.01 0.02 0.29 5 99 8.5 7.19 52 2.03 1.9 81 104 0.9 0.03 0.01 0.02 1.53 0.24 0.02 <0.01 0.02 0.27 6 00 9.3 7.28 58 1.63 1.2 88 109 1.3 0.04 0.01 0.02 1.63 0.25 0.02 <0.01 <0.01 0.25 7 01 5.0 7.29 50 2.04 1.8 82 98 1.5 0.02 0.03 0.01 1.33 0.25 0.02 <0.01 0.02 0.27 20 02 6.9 7.14 45 2.19 3.5 78 91 1.7 0.02 0.01 0.02 1.49 0.26 0.03 <0.01 0.03 0.30 <5 03 9.4 7.55 45 1.63 1.0 78 85 1.4 0.02 0.01 0.03 1.48 0.22 0.02 0.01 0.01 0.24 7 04 8.6 7.23 46 2.17 1.5 77 89 1.4 0.02 <0.01 0.02 1.45 0.21 0.03 <0.01 <0.01 0.23 7 05 8.6 7.27 46 1.73 1.1 77 80 1.8 0.02 0.01 0.02 1.35 0.28 0.02 <0.01 0.01 0.30 12 06 9.1 6.92 44 2.38 3.0 76 69 1.0 0.03 0.01 0.02 1.42 0.16 0.02 <0.01 <0.01 0.18 10 07 9.4 7.51 50 1.77 0.7 81 98 1.2 0.03 0.01 0.01 1.52 0.16 0.05 <0.01 <0.01 0.19 8 08 7.9 7.59 45 1.77 2.0 72 89 1.7 0.03 0.01 <0.01 1.59 0.15 < 0.02 <0.01 0.01 0.18 8 09 9.4 7.20 46 2.20 1.0 80 92 1.2 0.02 0.01 <0.01 1.72 0.30 < 0.02 <0.01 <0.01 0.32 19 10 8.3 7.35 40 2.33 1.2 72 84 1.0 0.03 0.01 <0.01 1.72 0.17 < 0.02 <0.01 <0.01 0.19 13 11 9.2 7.58 48 3.99 2.5 85 93 1.3 0.04 0.01 0.01 2.29 0.25 0.02 <0.01 0.01 0.28 12 12 9.4 7.17 55 1.72 1.6 84 105 0.7 0.03 0.01 <0.01 1.53 0.18 0.02 <0.01 <0.01 0.20 13 6.1 6.95 44 1.34 0.1 75 85 0.9 0.04 0.01 0.01 1.29 0.16 0.02 <0.01 0.01 0.17 14 5.9 7.01 39 2.57 1.4 73 80 1.3 0.02 0.01 0.02 1.47 0.19 0.02 <0.01 0.01 0.20 15 5.9 6.94 41 3.20 0.4 84 87 0.9 0.02 0.01 0.01 1.44 0.22 <0.02 <0.01 0.01 0.22 16 9.7 7.10 46 2.03 0.6 87 101 1.7 0.03 0.01 1.54 0.19 <0.02 <0.01 <0.01 0.20 17 10.0 7.18 42 1.66 0.7 70 83 1.0 0.02 0.01 1.51 0.15 0.02 <0.01 <0.01 0.16 18 9.7 7.47 55 2.57 0.8 85 106 1.0 0.04 0.02 0.15 0.02 <0.01 0.01 0.15 19 9.4 7.32 44 2.87 1.1 72 96 1.2 0.03 0.01 0.15 <0.02 <0.01 0.01 0.15 Maximum 13.8 8.10 58 6.50 13.2 109 162 1.9 0.06 0.03 0.04 2.29 0.49 0.10 0.01 0.10 0.60 24 Minimum 4.5 6.90 39 1.34 0.1 64 69 0.7 0.02 <0.01 <0.01 1.25 0.14 <0.02 <0.01 <0.01 0.15 <5 Average 8.1 7.34 47 2.70 2.1 80 95 1.3 0.03 0.01 0.02 1.53 0.24 0.03 0.01 0.02 0.26 10 #Tests 36 36 36 36 36 36 36 36 36 29 32 34 36 36 35 35 36 28 Site: SW-02 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2019 Oil& Coliforms Fecal/ Fecal -------Blue Green Algae--------------------->Single Hard- BOD Grease Ca Mg Na SAR Na Total E.coli Strap <--Colonies-> <----Filaments--> <--Filamaments-> Cells D.O. SO4 ness Year mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells m /L m /L m /L 81 < 1 < 1 3,820 283 2,315 5 10 37 452 0 0 2 82 83 1 < 1 336 73 33 0 0 6 32 2 30 0 8.85 2.34 32 84 1 < 1 7.77 1.95 4.48 0.37 24.8 3,140 122 180 155 105 3 5 347 209 44 8.61 1.10 29 85 86 87 1 < 1 9.80 2.50 7.10 0.52 29.6 40 <30 <30 0 0 0 0 0 0 0 9.10 3.40 88 1 < 1 9.15 2.38 6.77 0.51 30.1 107 32 90 0 0 92 877 46 1 92 9.43 3.58 89 1.0 < 1 8.50 2.06 6.85 0.55 32.4 86 31 58 0 0 79 1,968 35 213 0 9.28 3.77 90 1.2 < 1 8.77 2.15 6.93 0.54 31.9 112 30 72 0 0 0 0 0 0 323 7.53 3.75 33 91 1.1 < 1 9.24 2.29 7.10 0.54 30.9 130 40 40 0 0 0 0 0 0 0 7.41 4.35 30 92 1.4 1 10.99 2.49 8.08 0.57 31.2 372 73 150 5 91 86 201 0 0 0 8.82 4.55 38 93 1.2 < 1 9.25 2.29 7.05 0.54 31.0 810 261 150 0 0 4 95 0 0 0 8.15 4.09 28 94 1.0 < 1 9.24 2.30 7.97 0.61 33.8 753 31 90 0 0 0 0 0 0 0 8.13 5.04 58 95 1.2 1 9.08 2.15 6.15 0.48 28.9 793 243 230 0 0 0 0 0 0 0 8.81 4.35 30 96 1.2 1 10.77 2.67 7.07 0.49 27.8 1,956 529 770 0 0 0 0 0 0 0 8.53 2.93 35 97 1.1 3 12.43 3.10 7.21 0.46 25.9 1,567 497 155 0 0 3 53 0 0 0 8.74 3.36 45 98 1.0 < 1 11.23 2.74 6.51 0.46 26.1 982 562 160 0 0 0 0 0 0 0 8.92 2.63 42 99 1.0 10.56 2.64 6.47 0.46 26.6 863 90 <30 0 0 0 0 0 0 0 8.34 2.99 00 0.9 10.88 2.82 7.41 0.52 28.6 434 79 65 0 0 0 0 0 0 0 7.76 1.31 01 1.1 9.49 2.39 7.68 0.58 32.4 128 73 90 0 0 0 0 0 0 0 8.70 0.63 02 0.8 8.02 2.10 7.72 0.64 36.0 81 13 68 0 0 41 375 0 0 0 8.55 0.70 03 0.8 8.38 2.20 6.48 0.52 31.1 141 35 33 0 0 0 0 0 0 0 7.34 0.59 04 1.1 8.47 2.20 6.45 0.52 31.2 271 27 68 0 0 0 0 0 0 0 7.97 0.67 05 1.8 8.39 2.18 6.23 0.50 30.4 220 84 220 0 0 0 0 0 0 0 8.60 0.47 06 1.0 8.59 2.16 5.87 0.46 28.7 746 320 235 0 0 0 0 0 0 0 7.30 0.43 07 1.0 9.56 2.41 8.01 0.60 33.0 673 145 97 0 0 0 0 0 0 0 7.99 0.65 08 0.9 8.52 2.06 7.06 0.57 32.8 111 20 68 0 0 5 15 0 0 0 7.83 0.61 09 0.8 8.76 2.16 7.30 0.58 33.3 2,024 96 43 0 0 0 0 0 0 0 6.86 0.46 10 1.3 8.04 2.09 6.17 0.51 30.8 1,631 186 4 0 0 3 65 0 0 0 5.80 0.60 11 1.5 8.95 2.36 6.82 0.53 30.1 1,768 1,412 19 0 0 0 0 0 0 0 7.95 <0.50 12 1.4 10.36 2.50 7.86 0.57 31.2 323 186 3 0 0 0 0 0 0 0 6.48 <0.50 13 1.2 7.88 1.93 7.80 0.65 36.9 44 20 3 0 0 0 0 0 0 0 8.09 0.58 14 1.3 6.81 1.69 7.95 0.71 40.1 110 4 4 0 0 0 0 0 0 0 8.71 1.00 15 6.97 1.78 9.24 0.81 43.3 359 3 7.19 1.40 16 8.76 2.14 8.27 0.66 36.4 1,022 9 8.57 1.06 17 8.40 2.02 5.81 0.47 29.2 778 45 8.96 <0.50 18 717 35 8.53 <0.70 19 525 117 8.82 <0.57 Maximum 1.8 3 12.43 3.10 9.24 0.81 43.3 3,820 1,412 2,315 155 105 92 1,968 347 213 323 9.43 5.04 58 Minimum 0.8 < 1 6.81 1.69 4.48 0.37 24.8 40 3 3 0 0 0 0 0 0 0 5.80 0.43 28 Average 1.1 1 9.13 2.28 7.06 0.55 31.5 777 162 180 5 7 12 133 14 15 15 8.19 1.89 36 #Tests 31 15 32 32 32 32 32 36 36 31 31 31 31 31 31 31 31 35 35 11 Site: SW-02 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 0.4 0.4 0.3 0.3 J J m E E 0.2 0.2 - 0.1 -- - 0.1 0.0 0.0 0^ Ip 001 0 0^ Ip Oh OA Ip O, Is, OP OA C% 'N^ ^� ^0 ^1 0^ 00 9, 90 4b AA .1i, O, 00 65 1 115 Ih +Nitrate Linear(Nitrate) +Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 250 8 -- - - - - -- 200 - -- - -- 7 6 — 150 J J v1 5 01 E E 4 100 -- 3 2 550 1 0 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 0 0^ ,h .^ +Chlorides Linear(Chlorides) +TDS Linear(TDS) Site: SW-03 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek, Mid ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 03/04/19 3.7 7.18 33.8 4.6 6.57 75 76 3.94 0.051 0.019 0.170 < 0.020 < 0.010 0.072 04/01/19 6.5 7.94 27.8 2.6 1.52 65 80.1 2.03 0.025 0.016 0.192 < 0.020 < 0.010 0.045 05/08/19 12.0 7.28 46.0 3.9 NV 80 90 1.51 0.048 0.019 0.238 < 0.020 < 0.010 0.031 06/04/19 14.7 7.43 39.5 5.3 3.37 69 80.6 1.05 0.057 0.026 0.248 < 0.020 < 0.010 0.024 07/09/19 15.7 7.65 50.3 3.8 3.51 79 114 1.08 0.067 0.025 0.218 < 0.020 < 0.010 < 0.010 08/08/19 15.9 7.28 66.1 4.6 4.25 96 137 3.13 0.094 0.013 0.133 < 0.020 < 0.010 0.016 09/04/19 19.5 7.66 99.6 5.6 6.34 154 232 4.66 0.091 0.014 0.190 < 0.020 < 0.010 0.024 10/03/19 8.5 7.40 69.0 4.2 6.19 107 140 3.00 0.078 0.012 0.132 < 0.020 < 0.010 0.025 11/05/19 4.5 7.89 36.9 5.4 9.54 60 74.7 1.00 0.030 0.011 0.106 < 0.020 < 0.010 < 0.010 Maximum 19.5 7.94 99.6 5.6 9.54 154 232 4.66 0.094 0.026 0.248 < 0.020 < 0.010 0.072 Minimum 3.7 7.18 27.8 2.6 1.52 60 74.7 1.00 0.025 0.011 0.106 < 0.020 < 0.010 < 0.010 Average 11.2 7.52 52.1 4.4 5.16 87 114 2.38 0.060 0.017 0.181 < 0.020 < 0.010 0.029 #Tests 9 9 9 9 8 9 9 9 9 9 0 0 9 9 9 9 Site: SW-03 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek, Mid ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Oil & Coliforms Fecal <--Blue Green Algae-> Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filaments Filamam Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 03/04/19 0.242 78.9 4.1 11.23 1.15 04/01/19 0.237 52.9 3.1 11.09 1.02 05/08/19 0.269 387 6.3 9.71 1.36 06/04/19 0.272 1,990 54.7 8.57 1.04 07/09/19 0.218 2,880 222 7.84 0.935 08/08/19 0.149 2,420 461 7.23 2.20 09/04/19 0.214 9,800 1,780 7.04 2.81 10/03/19 0.132 2,280 189 7.45 2.06 11/05/19 0.106 613 4.1 11.0 1.72 Maximum 0.272 9,800 1,780 0 0 0 0 0 0 0 11.23 2.8 Minimum 0.106 53 3.1 0 0 0 0 0 0 0 7.04 0.94 Average 0.204 2,278 303 9.02 1.59 #Tests 9 0 0 0 0 0 0 0 0 9 9 0 0 0 0 0 0 0 0 9 9 0 Site: SW-03 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Mid ALPINE COUNTY SURFACEWATER QUALITY DATA From 1981 To: 2019 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO'-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L m /L mg/L m /L mg/L m /L 81 9.7 7.43 67 3.70 3 229 390 3.6 0.06 0.08 3.14 0.34 0.04 1.07 7 1 1 82 10.1 7.42 62 5.15 6 158 233 0.11 0.08 3.20 0.45 0.02 0.61 15 1 1 83 7.2 8.41 62 7.17 7 145 221 25.3 0.12 0.08 2.80 0.46 0.07 <0.01 0.45 0.45 14 1 < 1 84 7.5 7.47 60 4.20 4 109 154 11.7 0.11 0.02 •2.31 0.41 0.12 0.01 0.09 0.50 13 2 1 85 10.4 7.43 46 4.40 5 110 125 8.4 0.14 0.04 3.03 0.46 0.06 <0.01 0.02 0.48 16 2 < 1 86 5.5 7.77 57 4.70 2 115 176 14.6 0.07 0.04 1.97 0.08 <0.02 <0.01 0.12 0.22 6 1 < 1 87 8.8 7.18 71 3.03 4 149 230 20.7 0.06 0.06 2.00 0.19 0.02 <0.01 0.13 0.33 5 1 1 88 9.9 7.13 81 16.71 11 168 241 18.6 0.11 0.08 2.43 0.35 0.07 <0.01 0.03 0.38 8 1 < 1 89 9.2 7.43 78 6.48 4.7 126 183 8.9 0.08 0.03 1.63 0.23 0.03 <0.01 0.02 0.26 6 1.2 < 1 90 8.9 7.49 74 5.42 3.3 114 195 5.8 0.08 0.03 0.04 1.61 0.17 0.02 <0.01 0.03 0.21 7 1.1 < 1 91 10.3 7.42 95 8.64 5.1 146 202 7.7 0.11 0.02 0.04 2.35 0.32 0.06 0.01 0.06 0.39 9 1.3 < 1 92 10.6 7.47 103 8.20 4.0 151 216 6.1 0.12 0.03 0.05 2.05 0.29 0.05 0.01 0.02 0.32 12 1.3 1 93 9.8 7.33 85 7.77 3.8 146 213 8.1 0.11 0.04 0.04 2.24 0.38 0.04 0.01 0.02 0.42 14 1:8 < 1 94 9.9 7.40 104 10.91 4.3 154 234 8.6 0.13 0.03 0.03 1.81 0.35 0.03 0.01 0.02 0.38 <5 1.8 < 1 95 10.4 7.47 87 7.30 3.0 141 204 7.7 0.11 0.11 0.03 2.17 0.42 0.04 0.01 0.06 0.49 13 1.4 1 96 11.3 7.20 63 5.07 5.3 97 137 3.5 0.09 0.03 0.02 1.95 0.34 0.03 0.01 0.06 0.41 5 1.3 1 97 9.9 7.38 83 6.68 8.4 132 192 7.3 0.11 0.03 0.04 1.98 0.34 0.05 0.01 0.14 0.49 14 1.3 1 98 8.8 7.01 64 4.44 5.0 104 143 3.8 0.08 0.04 0.02 1.84 0.29 0.02 <0.01 0.04 0.34 <5 1.1 < 1 99 10.3 7.02 61 5.18 3.9 97 130 2.6 0.10 0.04 0.01 1.81 0.27 0.02 <0.01 0.03 0.32 <5 1.0 00 10.7 7.24 74 6.81 12.8 115 154 3.9 0.08 0.02 0.03 1.91 0.32 0.02 <0.01 0.03 0.35 <5 1.3 01 11.7 7.21 83 2.95 3.1 121 171 3.4 0.07 0.02 0.03 1.85 0.19 0.03 <0.01 0.02 0.22 14 1.0 02 11.7 7.15 100 7.82 7.8 142 199 4.0 0.11 0.02 0.03 2.36 0.38 0.04 <0.01 0.02 0.41 <5 1.7 03 11.6 7.41 83 9.23 8.5 123 165 3.4 0.12 0.02 0.03 2.10 0.34 0.04 0.01 0.01 0.37 7 1.8 04 11.2 7.21 88 7.36 8.5 130 174 3.9 0.11 0.01 0.04 2.07 0.28 0.04 <0.01 0.01 0.31 5 1.2 05 9.9 7.24 81 4.74 3.7 127 152 3.9 0.09 0.02 0.03 1.74 0.23 0.04 <0.01 0.03 0.27 9 1.6 O6 9.5 7.08 52 9.39 12.2 90 87 2.2 0.08 0.02 0.05 1.45 0.17 0.03 <0.01 0.02 0.20 7 1.3 07 10.4 7.49 83 4.53 5.4 121 157 3.2 0.08 0.02 0.02 2.06 0.18 0.02 <0.01 0.01 0.21 5 1.7 08 9.4 7.84 70 5.07 5.4 113 155 3.2 0.12 0.04 0.02 2.08 0.34 0.04 <0.01 0.01 0.36 9 2.0 09 9.3 7.58 75 4.31 2.6 115 158 2.8 0.07 0.02 0.02 1.95 0.21 <0.02 <0.01 0.02 0.23 6 1.0 10 8.6 7.39 59 6.17 9.2 95 124 2.3 0.08 0.02 0.01 1.75 0.18 0.03 <0.01 0.02 0.21 14 1.3 11 9.5 7.51 38 11.66 20.2 68 75 1.1 0.11 0.01 0.01 1.53 0.24 0.02 <0.01 0.03 0.28 12 2.6 12 11.1 7.38 71 3.01 -2.8 108 138 2.3 0.07 0.02 0.01 1.70 0.16 0.03 <0.01 0.01 0.18 1.4 13 11.6 7.21 57 12.36 11.5 90 115 1.7 0.08 0.03 0.01 1.72 0.25 0.04 <0.01 0.01 0.25 1.4 14 9.6 7.20 57 4.00 8.3 94 114 2.0 0.08 0.04 0.01 2.10 0.27 0.04 0.02 0.03 0.31 2.0 15 11.7 7.22 79 4.08 12.7 119 160 2.6 0.09 0.04 0.02 1.79 0.25 0.05 <0.01 0.02 0.27 16 10.5 7.01 60 16.58 33.7 100 126 2.4 0.18 0.02 1.65 0.29 0.02 <0.01 0.03 0.32 17 12.8 6.99 58 6.03 4.4 94 126 2.9 0.06 0.01 1.61 0.19 0.03 <0.01 0.08 0.26 18 12.7 7.30 71 4.23 5.5 109 146 3.5 0.07 0.03 0.15 0.02 <0.01 0.06 0.21 19 11.2 7.52 52.1 4.44 5.16 87 114 2.38 0.06 0.017 0.181 <0.020 <0.010 0.03 0.204 Maximum 12.8 8.41 104 16.71 33.7 229 390 25.3 0.18 0.11 0.08 3.20 0.46 0.12 0.02 0.45 1.07 16 2.6 1 Minimum 5.5 6.99 38 2.95 2.0 68 75 1.1 0.06 0.01 0.01 1.45 0.08 <0.02 <0.01 0.01 0.18 <5 1.0 < 1 Average 10.1 7.36 72 6.66 7.1 122 170 6.1 0.09 0.03 0.03 2.05 0.28 0.04 0.01 0.05 0.35 9 1.4 1 #Tests 39 39 39 39 39 39 39 38 39 30 35 37 39 39 37 37 39 31 34 18 Site: SW-03 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Mid ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2019 Coliforms Fecal/ Fecal < ---Blue Green Algae--------------> Single Hard- Ca Mg Na SAR Na Total E.coli Strep < Colonies-> <-Filaments-> <-Filamaments-> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 81 3,786 3,243 182 5 17 22 216 5 203 13 82 1,920 690 3,091 1,766 15,701 61 415 18 470 6,490 83 280 160 50 4 13 6 33 3 178 10 8.65 8.77 67 84 13.50 3.80 11.35 0.71 32.0 930 170 190 5 3 2 2 166 14 22 8.65 3.40 53 85 10.93 2.91 8.08 0.56 28.8 12,215 12,215 135 0 0 0 0 16 17 0 7.75 1.67 40 86 14.80 4.30 13.80 0.74 31.2 95 40 55 0 0 0 0 0 0 2,493 9.20 10.44 55 87 20.07 6.17 18.30 0.85 31.9 127 53 73 0 0 0 0 0 0 185 8.72 13.80 67 88 20.05 6.51 18.35 0.87 32.0 1,490 1,317 2,208 0 0 0 0 115 4 1,916 9.25 14.38 110 89 15.81 4.73 14.67 0.77 31.7 1,283 633 185 0 0 0 0 69 4 946 8.72 7.28 90 14.24 4.22 12.44 0.69 30.7 1,298 302 3,223 2 0 0 0 0 0 0 7.74 6.32 27 91 18.44 5.65 15.32 0.77 30.2 1,810 1,207 160 29 221 0 1 0 0 0 7.23 7.79 52 92 19.92 5.98 16.50 0.82 31.5 2,365 2,051 230 0 0 6 47 0 0 0 7.05 6.63 63 93 20.12 5.25 16.28 0.82 31.8 1,059 704 35 41 305 2 7 0 0 0 7.51 6.76 69 94 20.83 6.22 17.63 0.86 32.4 2,299 2,109 135 0 0 0 0 0 0 0 8.14 6.56 93 95 18.92 5.26 14.93 0.77 31.2 828 645 90 0 0 0 0 0 0 0 8.30 6.87 45 96 13.62 3.58 9.12 0.55 27.1 1,793 211 90 0 0 0 0 0 0 0 9.56 3.71 42 97 16.47 5.33 14.55 0.79 31.9 1,374 523 90 0 0 0 0 0 0 0 9.27 5.38 72 98 13.02 3.54 9.06 0.56 28.2 525 325 90 51 377 3 54 0 0 0 9.25 3.66 44 99 11.96 3.39 8.47 0.54 28.0 1,688 734 680 0 0 0 0 0 0 0 8.79 3.74 00 14.32 4.38 9.85 0.55 26.5 982 491 95 0 0 0 0 0 0 0 8.61 3.47 01 15.04 5.09 10.69 0.60 27.4 1,498 611 90 0 0 0 0 4 63 0 8.78 2.00 02 19.14 5.76 12.33 0.62 26.3 1,799 712 93 0 0 0 0 0 0 0 8.09 2.19 03 15.50 5.04 10.42 0.58 26.6 3,181' 1,606 167 0 0 0 0 0 0 0 7.22 2.19 04 16.99 5.54 10.65 0.56 25.3 1,703 141 217 0 0 0 0 0 0 0 7.84 2.09 05 16.97 5.35 10.21 0.54 24.9 2,310 1,826 23 0 0 0 0 0 0 0 7.36 1.94 06 10.70 3.19 6.39 0.43 24.9 1,452 486 59 0 0 0 0 0 0 0 8.37 1.50 07 16.02 5.33 10.70 0.57 25.8 2,001 1,918 1,222 0 0 4 20 0 0 0 7.57 2.15 08 14.96 4.86 9.25 0.51 24.6 2,147 1,542 260 0 0 0 0 0 0 0 7.53 2.48 09 15.07 4.92 9.33 0.52 24.9 4,282 991 57 0 0 0 0 0 0 0 7.07 2.62 10 12.60 3.84 6.96 0.42 23.0 3,238 1,436 4 0 0 3 11 0 0 0 7.50 2.18 11 7.94 2.23 4.21 0.34 22.7 1,913 309 51 0 0 0 0 0 0 0 9.16 1.25 12 13.86 4.24 8.28 0.48 24.1 1,450 1,338 26 0 0 0 0 0 0 0 8.04 2.12 13 12.15 3.58 6.64 0.41 22.9 3.061 1,311 27 0 0 0 0 0 0 0 8.43 1.91 14 12.17 3.71 6.74 0.43 23.3 3,152 2,580 122 0 0 0 0 0 0 0 8.66 3.08 15 16.54 5.30 9.36 0.50 23.6 1,552 431 8.75 2.62 16 13.20 3.96 7.21 0.43 23.1 10,015 2,332 9.75 3.41 17 12.48 3.61 7.72 0.49 26.2 1,987 226 8.79 2.31 18 5,080 1,340 8.49 2.97 19 2,280 303 8.19 1.79 Maximum 20.83 6.51 18.35 0.87 32.4 12,215 12,215 3,223 1,766 15,701 61 415 166 470 6,490 9.75 14.38 110 Minimum 7.94 2.23 4.21 0.34 22.7 95 40 4 0 0 0 0 0 0 0 7.05 1.25 27 Average 15.25 4.61 11.05 0.61 27.6 2,365 1,263 397 56 489 3 24 12 28 355 8.32 4.42 60 #Tests 34 34 34 34 34 39 39 34 34 34 34 34 34 34 34 37 37 15 Site: SW-03 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 0.4 0.4 0.3 0.3 - - - - ----- J J E E 0.2 0.2 0.1 rl 0.1 0.0 0.0 d' o� d° ,^ ,� ,y ,� ,o a� ay o a� a a', eP aA e o^ IS, oh oA d° IN 1' ,y +Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 50 __ _._.__ - - 500 40 400 30 300 - -- - - J J E 20 200 10 - 100 0 0 —f—Chlorides Linear(Chlorides) —o—TDS Linear(TDS) Site: SW-04 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek, Lower ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 03/04/19 5.7 7.39 41.5 7.7 14.3 82 91 3.35 0.078 0.020 0.254 < 0.020 < 0.010 0.180 04/01/19 7.3 8.15 37.0 3.7 3.99 69 91.1 2.09 0.033 0.018 0.192 < 0.020 < 0.010 0.064 05/08/19 11.8 7.42 36.5 9.7 NV 71 71 1.26 0.100 0.035 0.424 < 0.020 < 0.010 0.051 06/04/19 . 15.4 7.51 41.8 4.7 8.56 72 84.8 0.916 0.060 0.026 0.289 < 0.020 < 0.010 0.029 07/09/19 17.3 8.05 51.6 2.9 3.10 80 113 1.13 0.068 0.023 0.316 < 0.020 < 0.010 < 0.010 08/08/19 16.1 7.64 62.9 4.0 2.65 97 125 1.98 0.123 0.021 0.283 < 0.020 < 0.010 0.021 09/04/19 19.7 7.56 63.4 7.7 13.7 109 145 2.16 0.194 0.016 0.456 < 0.020 < 0.010 0.026 10/03/19 6.8 7.58 60.7 4.5 3.46 80 122 2.27 0.099 0.024 0.299 < 0.020 < 0.010 0.052 11/05/19 4.6 7.50 40.6 4.9 7.44 66 81.7 1.11 0.041 0.012 0.109 0.023 < 0.010 0.020 Maximum 19.7 8.15 63.4 9.7 14.30 109 145 3.35 0.194 0.035 0.456 0.023 < 0.010 0.180 Minimum 4.6 7.39 36.5 2.9 2.65 66 71 0.92 0.033 0.012 0.109 < 0.020 < 0.010 < 0.010 Average 11.6 7.64 48.4 5.5 7.15 81 103 1.81 0.088 0.022 0.291 0.020 < 0.010 0.050 #Tests 9 9 9 9 8 9 9 9 9 9 0 0 9 9 9 9 Site: SW-04 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek, Lower ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Oil & Coliforms Fecal <-Blue Green Algae--> Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na -Total E. coli Strep Colonies Filaments Filamamei Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 03/04/19 0.434 228 4.1 10.64 1.75 04/01/19 0.256 135 12.2 10.71 1.27 05/08/19 0.475 > 2,420 75.4 10.01 1.46 06/04/19 0.318 1,730 55.6 8.72 1.18 07/09/19 0.316 2,630 144 8.24 0.981 08/08/19 0.304 5,620 162 7.44 1.38 09/04/19 0.482 24,200 3,870 6.87 1.18 10/03/19 0.351 1,990 194 7.97 1.91 11/05/19 0.129 387 40.8 11.2 1.76 Maximum 0.482 > 24,200 3,870 0 0 0 0 0 0 0 11.20 1.91 Minimum 0.129 135 4.1 0 0 0 0 0 0 0 6.87 0.98 Average 0.341 4,371 506 9.09 1.43 #Tests 9 0 0 0 0 0 0 0 0 9 9 0 0 0 0 0 0 0 0 9 9 0 Site: SW-04 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Lower ALPINE COUNTY SURFACEWATER QUALITY DATA From:1981 To: 2019 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO,-P Boron K TKN NH3-N NO,-N NO3-N Total N COD BOD Grease Year C pH mg/L NTU m /L m /L umhos m /L m /L m /L m /L m /L m /L mg/L m /L m /L m /L m /L m /L m /L 81 12.4 8.02 68 2.68 5 174 260 5.2 0.08 0.05 3.69 0.46 0.04 0.56 13 1 1 82 10.1 7.51 59 4.46 11 133 194 0.09 0.06 2.37 0.39 0.02 0.58 13 1 < 1 83 7.6 8.04 51 5.60 9 111 173 17.4 0.10 0.06 2.20 0.46 0.05 <0.01 0.37 0.57 12 1 < 1 84 10.7 7.58 64 , 3.86 13 116 187 15.8 0.08 0.05 2.33 0.37 0.09 0.01 0.09 0.46 9 1 < 1 85 10.8 7.58 67 4.44 9 127 219 19.9 0.08 0.33 2.60 0.34 0.05 0.01 0.20 0.57 10 1 < 1 86 9.1 7.80 47 4.86 6 109 140 10.6 0.07 0.02 1.73 0.44 0.10 0.01 0.28 0.73 11 2 < 1 87 9.0 7.09 61 2.64 4 127 195 17.0 0.05 0.03 2.46 0.28 0.04 <0.01 0.06 0.35 8 1 < 1 88 9.1 7.43 51 4.53 10 93 122 3.8 0.07 0.02 1.72 0.29 0.04 <0.01 0.01 0.32 8 1 < 1 89 10.0 7.42 60 15.81 44.8 103 134 4.4 0.14 0.02 2.17 0.51 0.07 <0.01 0.04 0.56 15 1.3 < 1 90 8.6 7.57 58 4.10 11.3 89 122 2.6 0.09 0.04 0.03 1.73 0.21 0.02 <0.01 0.02 0.24 7 1.1 < 1 91 8.9 7.44 62 5.48 15.3 99 133 3.3 0.11 0.03 0.02 2.20 0.40 0.05 0.01 0.05 0.45 24 1.3 < 1 92 9.2 7.82 63 2.10 3.8 99 135 2.9 0.07 0.03 0.03 1.86 0.29 0.03 0.01 0.02 0.32 26 1.2 1 93 8.0 7.45 64 2.97 6.1 99 139 3.2 0.08 0.05 0.02 2.15 0.43 0.04 0.01 0.06 0.49 14 1.4 < 1 94 8.1 7.54 61 2.61 4.5 93 131 2.5 0.07 0.03 0.01 1.64 0.30 0.02 0.01 0.04 0.35 9 1.0 < 1 95 10.4 7.51 61 3.53 7.0 102 130 2.8 0.09 0.05 0.02 1.94 0.57 0.02 0.01 0.05 0.63 12 1.3 1 96 10.9 7.43 60 3.59 10.1 92 125 2.1 0.08 0.03 0.02 1.93 0.40 0.02 0.01 0.05 0.46 6 1.3 1 97 9.0 7.40 53 3.61 7.0 85 110 2.0 0.08 0.03 0.02 1.56 0.38 0.04 0.01 0.13 0.53 10 1.4 1 98 8.4 7.05 50 7.17 18.5 86 107 2.1 0.10 0.03 0.02 1.73 0.43 0.02 <0.01 0.03 0.47 6 1.3 < 1 99 9.8 7.22 52 4.49 13.1 83 108 1.7 0.08 0.03 0.01 1.78 0.31 <0.02 <0.01 0.02 0.34 6 1.2 00 9.6 7.32 52 5.76 9.4 87 108 1.8 0.07 0.02 0.02 1.58 0.32 <0.02 <0.01 0.02 0.36 <5 1.1 01 11.2 7.27 64 4.73 10.5 98 131 2.4 0.07 0.03 0.02 2.09 0.32 <0.03 <0.01 0.01 0.34 23 1.1 02 10.7 7.38 68 4.70 6.6 106 139 2.5 0.07 0.02 0.02 2.25 0.41 0.04 <0.01 <0.01 0.43 <5 1.2 03 10.5 7.76 57 5.68 10.2 90 116 2.1 0.06 0.02 0.02 1.43 0.33 0.03 <0.01 <0.01 0.36 11 1.1 04 10.7 7.19 63 6.37 6.4 99 128 2.4 . 0.09 0.01 0.03 2.36 0.36 0.05 <0.01 0.01 0.38 13 0.9 05 9.3 7.16 51 14.39 39.1 89 97 2.5 0.12 0.02 0.02 1.88 0.46 0.03 <0.01 0.04 0.51 19 1.7 O6 9.8 7.19 45 8.23 6.6 77 74 1.6 0.06 0.02 0.02 1.43 0.21 0.03 <0.01 0.04 0.25 9 1.2 07 11.4 7.58 53 12.27 13.9 81 111 2.1 0.10 0.02 0.01 2.11 0.43 0.02 <0.01 0.02 0.46 9 2.7 08 10.0 7.71 53 6.30 5.4 88 115 3.0 0.08 0.02 0.01 2.16 0.35 <0.02 <0.01 0.14 0.50 19 1.4 09 9.8 7.43 47 12.69 17.3 81 93 2.1 0.09 0.02 0.01 1.81 0.38 0.02 <0.01 0.04 0.43 11 1.1 10 9.8 7.42 49 7.26 10.8 89 106 2.9 0.10 0.03 0.01 2.46 0.32 0.02 <0.01 0.03 0.36 7 1.6 11 10.3 7.68 44 6.11 7.9 76 91 1.7 0.06 0.02 0.01 1.58 0.19 0.02 <0.01 0.04 0.24 8 1.5 12 11.6 7.57 63 6.10 3.8 97 133 2.3 0.08 0.03 0.02 1.92 0.23 0.03 <0.01 0.01 0.25 1.4 13 11.7 7.34 55 15.26 12.2 88 111 2.0 0.10 0.02 0.01 2.08 0.33 0.03 <0.01 0.01 0.28 1.7 14 10.3 7.58 48 9.49 14.9 87 103 2.1 0.08 0.03 0.01 2.08 0.33 0.04 <0.01 0.24 0.57 1.6 15 13.9 7.87 69 3.34 3.9 106 143 2.9 0.05 0.02 0.02 1.97 0.17 0.02 <0.01 0.01 0.17 16 10.8 7.12 52 4.40 6.4 97 116 2.2 0.09 0.03 2.15 0.35 0.02 <0.01 0.12 0.47 17 13.2 7.32 52 9.90 13.2 92 107 2.1 0.11 0.02 1.99 0.38 0.03 <0.01 0.14 0.52 18 13.4 7.63 57 10.24 16.0 95 116 1.9 0.13 0.04 0.35 0.02 <0.01 0.06 0.41 19 11.6 7.64 48.4 5.53 7.15 81 103 1.81 0.088 0.022 0.291 <0.020 <0.010 0.050 0.341 Maximum 13.9 8.04 69 15.81 44.8 174 260 19.9 0.14 0.05 0.33 3.69 0.57 0.10 0.01 0.37 0.73 26 2.7 1 Minimum 7.6 7.05 44 2.10 3.8 76 74 1.6 0.05 0.01 0.01 1.43 0.17 <0.02 <0.01 <0.01 0.17 <5 0.9 < 1 Average 10.2 7.49 56 6.34 11.0 98 131 4.3 0.08 0.03 0.03 2.03 0.35 0.03 0.01 0.07 0.43 12 1.3 1 #Tests 39 39 39 39 39 39 39 38 39 30 35 37 39 39 37 37 39 31 34 18 Site: SW-04 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Indian Creek,Lower ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2019 Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Ca Mg Na SAR Na Total E.co/i Strep-Colonies- <-Filaments-> <-Filamaments-> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 81 2,977 1,408 898 24 132 94 1,007 1 101 7 82 1,946 321 421 18 56 40 400 12 292 318 83 1,472 302 125 5 12 14 141 7 312 0 9.00 6.52 53 84 16.49 4.54 12.17 0.66 28.3 1,950 324 392 188 5 56 2 130 10 244 8.78 3.74 64 85 16.41 4.43 14.70 0.74 28.7 2,573 480 108 0 0 0 0 54 5 0 8.21 6.28 58 86 10.28 3.40 8.11 0.57 29.1 313 113 566 0 0 0 0 0 0 3,255 8.82 9.29 43 87 14.34 4.58 14.98 0.80 28.7 3,249 231 161 0 0 0 0 323 3 1,685 8.53 14.11 60 88 12.41 3.87 6.78 0.43 23.2 2,358 177 170 0 0 46 277 162 6 0 9.14 5.55 54 89 13.40 4.03 7.07 0.42 22.2 3,936 1,244 850 0 0 0 0 139 7 1,593 7.62 5.22 90 12.55 3.78 6.51 0.40 22.3 570 110 175 2 0 0 1 0 1 0 7.75 4.83 32 91 13.81 4.02 8.16 0.48 23.0 2,095 1,462 1,245 0 0 0 3 0 0 0 8.25 5.46 41 92 13.67 4.03 7.23 0.44 22.6 937 55 485 3 188 9 144 0 0 0 9.03 4.70 55 93 14.23 4.10 7.38 0.44 22.5 1,453 387 95 0 0 0 0 0 0 0 8.56 4.97 40 94 13.18 3.93 6.90 0.42 22.7 293 76 260 0 0 0 0 0 0 0 8.17 4.97 36 95 13.54 3.64 6.71 0.41 22.0 2,183 1,260 110 0 0 0 0 0 0 0 8.87 5.35 38 96 13.26 3.70 6.68 0.41 22.4 3,268 637 235 0 0 0 0 0 0 0 8.15 2.98 38 97 12.09 3.53 6.13 0.39 22.2 2,298 226 120 0 0 0 0 0 0 0 9.40 3.50 41 98 10.62 3.10 5.83 0.40 23.5 3,105 2,549 320 0 0 0 0 0 0 0 8.90 3.30 37 99 10.44 3.15 6.30 0.44 24.7 920 188 90 0 0 0 0 0 0 0 8.48 3.37 00 10.45 3.25 5.69 0.39 23.0 1,119 194 55 0 0 0 0 0 0 0 8.36 2.70 01 13.30 4.06 6.88 0.43 22.5 630 .235 320 0 0 0 0 0 0 0 8.78 1.51 02 14.26 4.11 7.02 0.42 22.2 1,503 305 330 0 0 0 0 0 0 0 8.46 1.45 03 11.57 3.64 6.40 0.42 23.3 489 52 512 0 0 0 0 0 0 0 6.82 1.47 04 12.75 3.94 5.94 0.37 20.4 2,245 171 92 0 0 0 0 0 0 0 7.37 1.40 05 11.15 3.43 5.74 0.38 21.9 1,534 407 152 0 0 0 0 0 0 0 7.77 1.70 06 9.52 2.78 4.96 0.37 22.9 2,010 305 58 0 0 0 0 0 0 0 7.53 1.15 07 11.35 3.48 6.00 0.40 22.4 913 97 1,222 0 0 0 0 0 0 0 6.38 1.69 08 11.22 3.37 6.26 0.42 23.4 1,080 893 5,965 0 0 4 48 0 0 0 7.70 2.10 09 9.83 3.06 5.63 0.40 23.7 3,324 571 217 0 0 7 62 0 0 0 8.30 2.01 10 10.39 3.10 6.05 0.42 23.6 3,325 2,022 13 0 0 0 0 0 0 0 7.81 2.07 11 9.10 2.75 5.15 0.38 23.4 1,694 80 22 0 0 0 0 0 0 0 8.10 1.42 12 12.50 3.79 7.12 0.44 23.6 1,518 917 80 0 0 6 77 0 0 0 6.71 1.78 13 11.76 3.50 6.19 0.40 22.4 3,119 76 27 0 0 0 0 0 0 0 6.68 1.73 14 10.75 3.21 5.93 0.41 23.2 4,756 1,614 242 0 0 0 0 0 0 0 9.37 3.01 15 14.42 4.84 8.35 0.48 23.8 1,821 160 9.53 2.15 16 11.59 3.31 5.95 0.39 22.3 4,132 360 9.33 2.71 17 11.23 3.14 6.22 0.42 23.9 9,707 1,348 9.21 1.77 18 8,310 1,181 9.42 1.96 19 4,370 506 9.09 1.43 Maximum 16.49 4.84 14.98 0.80 29.1 9,707 2,549 5,965 188 188 94 1,007 323 312 3,255 9.53 14.11 64 Minimum- 9.10 2.75 4.96 0.37 20.4 293 52 13 0 0 0 0 0 0 0 6.38 1.15 32 Average 12.29 3.66 7.15 0.45 23.5 2,449 591 474 7 12 8 64 24 22 209 8.33 3.55 46 #Tests 34 34 34 34 34 39 39 34 34 34 34 34 34 34 34 37 37 15 Site: SW-04 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 0.4 0.4 0.3 0.3 J J & m E 0.2 E 0.2 - 0.1 0.1 0.0 0.0 t Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 50 500 40 400 30 _ --- - 300 J J E 20 E 200 - - - - 10 100 0 qq N qq O N q _10 O O 'aa O aD m m rn rn $ O O O O V t Chlorides Linear(Chlorides) t TDS Linear(TDS) Site: SW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Paynesville ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NOZ-N NO3-N Total N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L m /L 01/03/19 0.3 8.08 44.8 1.2 0.3 51 101 2.69 0.016 0.013 0.095 < 0.020 < 0.010 0.046 0.141 02/07/19 0.2 8.33 42.5 1.9 0.97 82 108 4.48 0.017 0.015 0.147 < 0.020 < 0.010 0.060 0.207 03/04/19 4.3 8.10 36.4 1.1 1.56 72 88 4.79 0.022 < 0.010 0.117 < 0.020 < 0.010 0.029 0.146 04/01/19 5.1 8.22 34.4 1.9 3.17 65 90.9 5.19 0.017 < 0.010 0.165 < 0.020 < 0.010 < 0.010 0.165 05/08/19 5.7 7.60 19.9 6.1 NV 39 40 1.01, 0.040 0.011 0.181 < 0.020 < 0.010 < 0.010 0.181 06/04/19 7.6 7.83 19.7 8.8 16.3 39 40.3 0.570 0.044 0.016 0.116 < 0.020 < 0.010 0.016 0.132 07/09/19 14.8 8.04 23.2 1.5 3.77 38 52.3 0.625 0.024 < 0.010 0.125 < 0.020 < 0.010 < 0.010 0.125 08/08/19 15.8 7.91 33.9 1.8 2.86 53 68 1.01 0.026 < 0.010 0.114 < 0.020 < 0.010 0.011 0.125 09/04/19 17.0 8.10 34.3 0.75 1.42 53 78.4 1.00 0.022 < 0.010 0.168 < 0.020 < 0.010 < 0.010 0.168 10/03/19 6.9 8.14 38.1 1.6 1.90 59 74 1.12 0.021 < 0.010 0.133 < 0.020 < 0.010 < 0.010 0.133 11/05/19 6.1 7.89 40.4 0.82 0.73 65 85.1 1.55 0.013 < 0.010 0.100 < 0.020 < 0.010 0.018 0.118 12/03/19 3.4 7.89 40.0 0.97 0.89 69 88 2.63 0.020 < 0.010 0.115 < 0.020 < 0.010 0.012 0.127 Maximum 17.0 8.33 44.8 8.8 16.3 82 108 5.19 0.044 0.016 0.181 < 0.020 < 0.010 0.060 0.207 Minimum 0.2 7.60 19.7 0.75 0.30 38 40.0 0.570 0.013 < 0.010 0.095 < 0.020 < 0.010 < 0.010 0.118 Average 7.3 8.01 34.0 2.4 3.08 57 76.2 2.22 0.024 0.011 0.131 < 0.020 < 0.010 0.020 0.147 #Tests 12 12 12 12 11 12 12 12 12 12 0 0 12 12 12 12 12 Site: SW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Paynesville ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Oil& Coliforms Fecal <----------Blue Green Algae---------Single Hard- COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filaments Filamaments Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L m /L 01/03/19 62.4 4.1 12.7 3.12 02/07/19 59.1 2.0 12.86 3.47 03/04/19 60.1 2.0 11.48 2.68 04/01/19 517 13.4 11.07 2.28 05/08/19 113 2.0 11.73 1.31 06/04/19 308 8.6 10.30 0.816 07/09/19 1,550 31.7 8.56 0.966 08/08/19 > 2,420 79.4 8.43 1.43 09/04/19 > 2,420 22.8 8.45 1.38 10/03/19 345 23.3 8.80 2.00 11/05/19 214 22.8 11.00 2.31 12/03/19 1,050 53.8 11.1 2.51 Maximum > 2,420 79.4 0 0 0 0 0 0 0 12.86 3.47 Minimum 59.1 2.0 0 0 0 0 0 0 0 8.43 0.816 Average 760 22.2 10.54 2.02 #Tests 0 0 0 0 0 0 0 0 12 12 0 0 0 0 0 0 0 0 12 12 0 Site: SW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Paynseville ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2019 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO,-N Total N COD BOD Grease Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L m /L 81 9.9 7.93 36 1.15 4 64 78 1.8 0.03 0.01 1.52 0.23 0.03 0.32 6 1 < 1 82 6.4 7.61 28 2.57 23 49 57 0.04 0.02 1.11 0.19 0.01 0.29 9 1 1 83 6.0 7.73 30 2.45 8 43 60 0.9 0.03 0.03 1.17 0.19 0.05 <0.01 0.04 0.23 7 1 < 1 84 8.4 7.78 33 2.08 13 49 70 1.2 0.04 0.02 1.46 0.27 0.08 0.01 0.03 0.30 5 1 1 85 7.6 7.86 37 5.11 9 50 78 1.7 0.05 0.24 2.20 0.24 0.04 <0.01 0.04 0.28 7 1 < 1 86 6.5 7.91 32 1.92 6 53 67 1.4 0.03 0.01 1.35 0.19 0.04 <0.01 0.05 0.24 5 1 1 87 9.7 7.54 42 1.09 4 68 91 2.1 0.04 0.01 1.88 0.21 0.03 <0.01 0.06 0.28 5 1 < 1 88 9.2 7.69 42 1.10 4 80 100 3.3 0.02 0.02 1.81 0.21 0.03 <0.01 0.09 0.32 5 1 < 1 89 8.7 7.75 36 1.65 7.3 60 88 2.2 0.03 0.02 1.92 0.20 0.03 <0.01 0.06 0.27 6 1.1 < 1 90 9.4 7.77 40 1.61 4.8 73 96 2.0 0.04 0.02 0.02 1.73 0.18 0.02 <0.01 0.07 0.26 6 1.0 2 91 9.9 7.73 40 2.11 6.3 71 86 2.3 0.04 0.01 0.02 1.70 - 0.20 0.03 0.01 0.11 0.31 10 1.0 < 1 92 9.3 8.01 40 1.37 4.6 69 90 2.0 0.03 0.01 0.02 1.65 0.20 0.03 0.01 0.04 0.25 8 1.0 1 93 7.2 7.80 33 2.01 7.0 58 77 1.7 0.03 0.01 0.02 1.40 0.21 0.03 0.01 0.06 0.28 8 1.2 < 1 94 8.8 7.93 39 1.10 2.4 66 88 1.5 0.03 0.01 0.01 1.68 0.19 0.02 0.01 0.04 0.25 <5 1.0 < 1 95 7.1 7.69 31 1.70 10.7 54 68 1.4 0.03 0.01 0.01 1.28 0.26 0.02 0.01 0.04 0.31 7 1.0 1 96 9.1 7.57 32 1.18 5.8 59 72 1.4 0.03 0.01 0.02 1.37 0.24 0.02 0.01 0.05 0.31 2 1.2 1 97 8.1 7.49 32 6.29 19.3 59 68 1.1 0.05 0.01 0.02 1.46 0.16 0.03 0.01 0.10 0.27 5 1.0 1 98 6.8 7.27 33 1.31 5.0 56 72 1.4 0.02 0.01 0.01 1.43 0.18 0.02 <0.01 0.05 0.24 <5 0.9 < 1 99 8.1 7.37 33 1.12 3.7 59 74 1.5 0.03 0.01 0.01 1.61 0.23 <0.02 <0.01 0.04 0.28 <5 1.0 00 7.3 7.33 35 1.34 6.3 61 77 1.4 0.03 0.01 0.02 1.53 0.16 0.02 0.01 0.03 0.19 <5 1.0 01 11.4 7.49 38 1.63 3.6 62 84 1.6 0.02 0.01 0.01 1.72 0.18 0.02 <0.01 0.02 0.21 15 1.0 02 8.6 7.46 37 1.62 2.8 64 80 1.8 0.02 <0.01 0.01 1.57 0.22 0.03 <0.01 0.02 0.25 <5 0.9- 03 9.0 7.68 36 4.27 10.5 61 74 1.8 0.03 0.01 0.01 1.50 0.21 0.03 0.01 0.03 0.25 6 0.9 04 8.7 7.35 36 3.97 10.4 62 76 1.8 0.03 0.01 0.02 1.56 0.19 0.03 <0.01 0.03 0.23 8 0.7 05 7.9 7.26 34 2.98 5.6 59 62 2.0 0.02 0.01 0.02 1.41 0.20 0.02 <0.01 0.03 0.24 12 1.3 06 8.0 7.25 29 3.58 6.7 53 49 1.4 0.03 0.01 0.02 1.24 0.13 0.02 <0.01 0.02 0.16 8 0.9 07 9.9 7.70 36 1.79 3.4 63 76 1.6 0.02 <0.01 0.01 1.60 0.14 0.02 <0.01 0.01 0.16 8 1.1 08 7.7 7.71 36 1.94 2.8 61 72 1.8 0.02 <0.01 0.01 1.61 0.18 <0.02 <0.01 0.01 0.20 8 1.0 09 7.5 7.55 35 2.97 5.2 58 74 1.5 0.02 <0.01 0.01 1.49 0.17 0.02 <0.01 0.01 0.20 11 0.8 10 5.9 7.51 33 3.55 5.6 59 73 1.5 0.02 0.01 < 0.01 1.52 0.10 0.02 <0.01 0.01 0.12 34 1.1 11 5.8 7.62 31 3.51 6.5 57 66 1.1 0.03 0.01 0.01 1.37 0.10 0.02 <0.01 0.02 0.13 8 1.4 12 8.2 7.46 37 1.95 3.1 61 78 1.3 0.02 0.01 0.01 1.58 0.13 0.23 <0.01 0.01 0.15 1.4 13 8.7 7.41 35 1.69 2.9 60 72 1.2 0.02 0.01 0.01 1.40 .0.14 0.03 <0.01 0.02 0.15 1.0 14 7.8 7.54 39 1.29 2.0 65 83 1.5 0.02 0.01 0.01 1.62 0.13 0.03 <0.01 0.01 0.14 1.0 15 8.8 7.35 38 1.72 2.6 68 85 1.4 0.02 0.01 0.01 1.59 0.14 <0.02 <0.01 0.01 0.14 16 7.1 7.08 33 2.42 5.0 63 73 1.6 0.03 <0.01 1.42 0.16 <0.02 <0.01 0.03 0.18 17 6.8 7.25 30 2.77 6.2 55 65 1.3 0.03 0.01 1.14 0.15 0.02 <0.01 0.02 0.16 18 8.6 7.77 36 1.54 2.6 63 79 1.8 0.03 0.01 0.12 0.02 <0.01 0.02 0.13 19 7.3 8.01 34.0 2.37 3.1 57 76.2 2.2 0.024 <0.011 0.131 <0.020 <0.010 0.020 0.147 Maximum 11.4 8.01 42 6.29 23.0 80 100 3.3 0.05 0.02 0.24 2.20 0.27 0.23 0.01 0.11 0.32 34 1.4 2 Minimum 5.8 7.08 28 1.09 2.0 43 49 0.9 0.02 <0.01 0.01 1.11 0.10 0.01 <0.01 0.01 0.12 2 0.7 < 1 Average 8.1 7.60 35 2.25 6.3 60 76 1.6 0.03 0.01 0.02 1.53 0.18 0.03 0.01 0.04 0.23 8 1.0 1 #Tests 39 39 39 39 39 39 39 38 39 30 35 37 39 39 37 37 39 31 34 18 Site: SW-05 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Paynseville ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2019 Coliforms Fecal/ Fecal ----Blue Green Algae > Single Hard- Ca Mg Na SAR Na Total E.col/ Strep <-Colonies--> -Filaments- <--Filamaments-> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells m /L m /L m /L 81 1,388 700 492 173 2,303 36 230 2 81 11 82 506 456 226 26 60 62 738 10 285 16 83 1,198 1,048 360 6 12 18 158 22 396 4 9.37 4.05 26 84 6.85 1.93 3.42 0.29 21.1 2,506 822 286 90 56 16 36 368 41 180 9.22 1.44 23 85 7.81 2.15 3.85 0.31 21.0 2,904 1,227 299 0 0 52 280 58 1 139 9.13 2.25 29 86 6.70 1.90 3.11 0.26 19.9 2,951 1,179 378 0 0 23 346 46 1 23 9.63 9.08 27 87 8.73 2.53 4.93 0.37 23.2 2,643 607 348 0 0 0 0 208 4 5,194 9.48 5.71 32 88 9.49 2.76 5.88 0.41 24.7 815 238 93 0 0 0 0 705 25 1,158 11.15 5.26 89 7.90 2.22 4.20 0.33 21.6 945 511 228 0 0 0 0 600 24 1,685 9.81 4.47 90 8.99 2.45 4.92 0.36 22.9 1,343 232 450 0 46 0 0 0 0 0 8.83 4.96 31 91 8.77 2.42 4.73 0.35 22.7 398 83 230 0 0 0 0 0 0 0 9.05 5.22 30 92 8.89 2.33 4.74 0.36 23.0 886 181 65 0 0 0 0 0 0 0 9.80 5.06 30 93 7.81 2.65 3.83 0.30 21.2 886 491 680 0 0 0 0 0 0 0 10.50 4.33 26 94 8.69 2.29 4.74 0.36 23.4 1,390 672 90 0 0 3 70 0 0 0 9.93 5.27 33 95 7.24 1.85 3.64 0.30 21.9 218 41 90 0 0 0 0 0 0 0 9.82 4.64 24 96 7.40 1.93 3.82 0.31 22.3 918 248 55 0 0 0 0 0 0 0 8.93 2.57 26 97 7.34 2.09 3.86 0.32 22.3 243 41 65 0 0 0 0 0 0 0 9.88 3.26 26 98 6.85 1.89 3.79 0.32 23.2 585 80 35 0 0 18 132 0 0 0 9.97 2.47 21 99 7.03 1.97 4.05 0.34 23.8 718 83 35 0 0 0 0 0 0 0 9.41 2.50 00 6.79 2.05 4.29 0.37 25.0 263 90 30 0 0 0 0 0 0 _0 10.02 2.70 01 8.07 2.24 4.96 0.39 25.0 210 58 40 0 0 0 0 0 0 0 9.29 2.60 02 7.80 2.14 4.86 0.39 25.4 250 78 82 0 0 0 0 0 0 0 9.63 2.70 03 7.65 2.19 4.59 0.37 24.7 334 54 33 0 0 0 0 0 0 0 8.65 2.39 04 7.51 2.21 4.53 0.37 24.3 316 51 7 0 0 0 0 0 0 0 8.95 2.73 05 7.45 2.07 4.26 0.35 23.8 72 29 51 4 266 35 216 0 0 0 10.13 2.56 06 6.51 1.80 3.39 0.30 21.6 259 77 23 0 0 0 0 0 0 0 9.86 1.60 07 7.90 2.20 4.87 0.39 25.1 202 63 33 0 0 0 0 0 0 0 9.33 2.42 08 7.98 2.16 4.79 0.38 24.9 512 98 162 0 0 0 0 4 821 0 9.84 2.86 09 7.70 2.01 4.45 0.36 24.5 333 106 48 0 0 0 0 0 0 0 9.90 2.54 10 7.44 2.06 4.14 0.34 23.3 983 949 68 0 0 0 0 0 0 0 9.37 2.49 11 6.71 1.82 3.58 0.31 22.7 389 143 9 0 0 3 54 0 0 0 10.50 1.64 12 7.81 2.06_ 4.34 0.35 23.6 321 74 4 0 0 0 0 0 0 0 9.14 2.28 13 7.93 2.00 4.29 0.35 23.5 740 62 7 0 0 0 0 0 0 0 9.71 2.30 14 8.41 2.20 4.95 0.39 25.0 1,545 108 6 0 0 0 0 0 0 0 9.62 2.63 15 8.85 2.27 4.93 0.38 24.1 1,087 104 10.46 2.75 16 7.81 2.03 4.32 0.35 23.8 1,167 59 11.46 2.39 17 6.92 1.80 3.49 0.30 22.2 581 37 10.45 1.49 18 20,967 20,255 10.45 1.99 19 760 22 10.54 2.02 Maximum 9.49 2.76 5.88 0.41 25.4 20,967 20,255 680 173 2,303 62 738 705 821 5,194 11.46 9.08 33 Minimum 6.51 1.80 3.11 0.26 19.9 72 22 4 0 0 0 0 0 0 0 8.65 1.44 21 Average 7.76 2.12 4.31 0.35 23.3 1,403 807 150 9 81 8 66 59 49 247 9.76 3.23 27 #Tests 34 34 34 34 34 39 39 34 34 34 34 34 34 34 34 37 37 14 Site: SW-05 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 0.4 --- 0.4 0.3 0.3 -- - J J a E E 0.2 - - - 0.2 0.1 0.1 - 0.0 0.0 0^ o^ o� d> oA db ^^ 0 .b ^\ e^ %b eh e1 mO e^ 0� � e� �° o^ 0 05 0k 1P �` 1' ^y ^� —+—Nitrate Linear(Nitrate) +Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 250 9 8 - 200 7 6 - 150 - - -- - -- 6 5 - - w 4 - -- E 100 3 2 50 - - -- -- 1 -- 0 0 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 Oh 0N 0° 0^ IP 10 166 c? o o'' Oh o'` 09 ^^ ^A N5 ^1 +Chlorides Linear(Chlorides) +TDS LinearJDS) Site: SW-06 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River, Stateline ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 01/03/19 0.2 7.81 47.8 0.55 0.2 84 111 3.39 0.010 0.010 0.065 < 0.020 0.013 0.095 02/07/19 0.4 8.01 44.1 1.5 3.07 90 114 5.28 0.013 0.012 0.160 < 0.020 < 0.010 0.071 03/04/19 5.0 8.27 36.8 1.1 1.58 58 89 4.87 0.019 < 0.010 0.121 < 0.020 < 0.010 0.030 04/01/19 6.3 7.88 35.0 2.1 3.26 62 91.6 5.31 0.016 < 0.010 0.177 < 0.020 < 0.010 0.022 05/08/19 6.3 7.63 20.3 5.8 NV 38 41 1.02 0.043 0.011 0.190 < 0.020 < 0.010 < 0.010 06/04/19 9.9 8.00 20.5 9.1 19.5 31 40.2 0.583 0.051 < 0.015 0.125 < 0.020 < 0.010 0.017 07/09/19 17.8 8.52 24.7 1.5 3.70 44 47.1 0.695 0.025 < 0.010 0.143 < 0.020 < 0.010 0.014 08/08/19 17.2 7.90 37.2 0.78 0.64 61 83 1.55 0.117 < 0.010 0.070 < 0.020 < 0.010 0.128 09/04/19 18.4 7.88 41.8 0.62 0.65 65 99.2 1.66 0.022 < 0.010 0.162 < 0.020 < 0.010 0.122 10/03/19 6.9 8.05 38.3 1.4 2.06 31 77 1.22 0.017 < 0.010 0.206 < 0.020 < 0.010 0.014 11/05/19 4.8 7.38 43.6 0.67 0.49 71 92.2 1.85 0.017 0.010 < 0.100 < 0.020 < 0.010 0.053 12/03/19 3.5 8.16 41.8 1.0 0.50 79 94 3.19 0.017 < 0.010 -0.117 < 0.020 < 0.010 0.054 Maximum 18.4 8.52 47.8 9.1 19.5 90 114 5.31 0.117 0.015 0.206 < 0.020 0.013 0.128 Minimum 0.2 7.38 20.3 0.55 0.20 31 40.2 0.583 0.010 < 0.010 0.065 < 0.020 < 0.010 < 0.010 Average 8.1 7.96 36.0 22 3.24 60 81.6 2.55 0.031 0.011 0.136 < 0.020 0.010 0.053 #Tests 12 12 12 12 11 12 12 12 12 12 0 0 12 12 12 12 Site: SW-06 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River, Stateline ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Oil & Coliforms Fecal <-Blue Green Algae-> Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filamer Filama Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um#cells mg/L mg/L mg/L 01/03/19 0.173 248 38.9 13.1 3.67 02/07/19 0.231 108 31.4 13.56 3.82 03/04/19 0.151 67.0 1.0 11.56 2.88 04/01/19 0.199 281 13.4 10.91 2.42 05/08/19 0.190 116 2.0 11.84 1.32 06/04/19 0.142 727 26.5 9.38 0.826 07/09/19 0.157 1200 25.3 7.77 1.04 08/08/19 0.198 2420 46.4 8.53 2.01 09/04/19 0.284 > 2420 31.3 9.15 2.12 10/03/19 0.220 816 184 8.92 2.07 11/05/19 0.143 > 2420 39.3 10.6 2.54 12/03/19 0.171 1300 53.0 11.7 2.98 Maximum 0.284 > 2,420 184 0 0 0 0 0 0 0 13.56 3.82 Minimum 0.142 67.0 1.0 0 0 0 0 0 0 0 7.77 0.83 Average 0.188 1,010 41 10.59 2.31 #Tests 12 0 0 0 0 0 0 0 0 12 12 0 0 0 0 0 0 0 0 12 12 0 1 Site: SW-06 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Stateline ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2019 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg1L mg/L mg/L 81 10.7 7.75 38 1.00 3 69 83 1.8 0.02 0.01 1.72 0.22 0.04 0.30 6 1 < 1 82 83 8.9 7.70 32 3.43 11 55 63 1.1 0.04 0.03 1.46 0.18 0.02 <0.01 0.02 0.21 7 1 < 1 84 10.1 7.72 38 2.42 10 56 82 2.2 0.04 0.02 1.59 0.27 0.07 <0.01 0.02 0.29 6 1 < 1 85 9.5 7.84 42 1.88 4 63 99 4.0 0.03 0.30 1.85 0.21 0.04 <0.01 0.02 0.24 7 1 < 1 86 7.2 7.90 35 1.98 7 58 76 2.3 0.03 0.01 1.47 0.20 0.04 <0.01 0.03 0.23 6 1 < 1 87 10.6 7.36 48 1.38 4 79 110 4.3 0.03 0.02 2.19 0.21 0.03 <0.01 0.02 0.24 5 1 < 1 88 10.7 7.59 48 3.46 9 90 125 6.1 0.04 0.02 2.10 0.28 0.04 <0.01 0.02 0.31 7 1 1 89 9.8 7.69 42 1.72 6.5 77 109 5.0 0.03 0.02 1.75 0.21 0.03 <0.01 0.06 0.27 6 1.2 < 1 90 9.6 7.82 47 1.86 3.0 88 118 4.9 0.03 0.02 0.02 2.06 0.18 0.02 <0.01 0.04 0.23 5 1.1 < 1 91 9.4 7.62 45 1.82 5.2 78 107 4.4 0.05 0.01 0.02 1.95 0.21 0.03 0.01 0.03 0.25 9 1.1 1 92 10.1 7.81 45 1.83 3.8 79 113 4.2 0.03 0.01 0.02 1.88 0.23 0.03 0.01 0.02 0.25 8 1.2 1 93 7.8 7.72 35 2.13 8.3 63 82 2.2 0.03 0.01 0.02 1.54 0.22 0.02 0.01 0.04 0.28 14 1.3 < 1 94 9.9 7.85 42 0.91 2.3 72 98 2.4 0.03 0.01 0.02 1.80 0.22 0.02 0.01 0.02 0.25 6 1.1 < 1 95 8.0 7.62 32 1.86 11.7 61 75 2.0 0.04 0.01 0.01 1.34 0.29 0.02 0.01 0.07 0.37 8 1.2 1 96 9.7 7.51 35 1.69 5.4 63 80 2.1 0.03 0.01 0.02 1.46 0.25 0.02 0.01 0.05 0.31 3 1.1 1 97 9.1 7.53 34 2.53 8.2 62 76 1.7 0.04 0.01 0.02 1.73 0.20 0.03 0.01 0.15 0.36 5 1.2 1 98 8.9 7.31 35 1.64 5.6 61 78 2.0 0.03 0.01 0.01 1.49 0.20 0.02 <0.01 0.05 0.26 <5 1.0 < 1 99 10.5 7.33 33 1.09 6.7 60 78 1.6 0.03 <0.01 0.02 1.59 0.21 0.02 <0.01 0.03 0.24 <5 0.9 00 10.0 7.30 36 1.69 6.9 66 82 2.2 0.03 <0.01 0.02 1.61 0.19 0.02 <0.01 0.03 0.23 <5 1.0 01 12.4 7.46 38 1.96 4.0 65 92 2.2 0.02 0.01 0.01 1.74 0.20 0.02 <0.01 0.02 0.24 13 0.9 02 11.0 7.66 36 1.84 3.9 64 81 2.2 0.03 <0.01 0.02 1.59 0.24 0.04 <0.01 0.02 0.27 <5 1.0 03 9.7 7.61 37 3.29 6.6 67 84 2.5 0.03 0.01 0.02 1.65 0.23 0.03 <0.01 0.05 0.28 6 0.9 04 10.5 7.52 37 4.30 9.6 65 81 2.3 0.03 <0.01 0.02 1.56 0.21 0.03 <0.01 0.03 0.24 10 0.7 05 9.3 7.37 34 2.98 5.8 61 69 2.6 0.02 < 0.01 0.02 1.47 0.24 0.02 <0.01 0.06 0.30 9 1.3 06 9.2 7.11 30 3.61 8.5 54 49 1.5 0.03 <0.01 0.02 1.27 0.10 0.03 <0.01 0.03 0.14 17 1.0 07 11.7 7.73 33 2.03 3.9 63 83 2.1 0.02 <0.01 0.01 1.77 0.15 0.02 <0.01 0.05 0.21 7 1.0 08 11.5 7.94 38 1.56 2.4 63 86 2.8 0.03 <0.01 0.01 1.86 0.21 0.02 <0.01 0.06 0.28 6 1.0 09 9.5 7.73 36 2.71 5.8 65 80 2.1 0.02 <0.01 0.01 1.63 0.20 0.02 <0.01 0.05 0.26 11 0.9 10 8.1 7.60 32 3.16 5.9 57 72 1.6 0.03 0.01 0.01 1.62 0.13 <0.02 <0.01 0.02 0.16 12 1.2 11 8.3 7.73 31 3.97 9.1 56 68 1.3 0.04 0.01 0.01 1.60 0.14 0.02 <0.01 0.03 0.19 7 1.3 12 11.0 7.29 40 1.66 3.1 62 81 1.5 0.02 0.01 0.01 1.67 0.18 0.03 <0.01 0.02 0.21 1.3 13 11.2 7.51 36 2.15 4.0 62 74 1.4 0.03 0.01 0.01 1.45 0.19 0.02 <0.01 0.02 0.20 0.9 14 9.7 7.57 39 1.18 2.2 67 89 2.0 0.02 0.01 0.01 1.84 0.13 0.03 <0.01 0.03 0.15 1.0 15 9.1 7.36 40 2.06 5.2 69 88 1.9 0.02 <0.01 0.02 1.66 0.15 0.02 <0.01 0.04 0.19 16 7.8 7.21 34 2.37 5.2 66 76 1.9 0.03 <0.01 1.47 0.17 <0.02 <0.01 0.04 0.21 17 7.1 7.29 31 3.11 8.1 56 67 1.4 0.03 <0.01 1.19 0.15 0.02 <0.01 0.04 0.18 18 9.2 7.86 38 1.58 3.0 67 86 2.7 0.03 0.01 0.15 0.02 <0.01 0.04 0.19 19 8.1 7.96 36 2.18 3.2 60 82 2.6 0.03 <0.01 0.14 <0.02 <0.01 0.05 0.19 Maximum 12.4 7.96 48 4.30 11.7 90 125 6.1 0.05 6.02 0.30 2.19 0.29 0.07 0.01 0.15 0.37 17 1.3 1 Minimum 7.1 7.11 30 0.91 2.2 54 49 1.1 0.02 <0.01 0.01 1.19 0.10 0.02 <0.01 0.02 0.14 3 0.7 < 1 Average 9.6 7.59 37 2.21 5.8 66 85 2.5 0.03 0.01 0.02 1.66 0.20 0.03 0.01 0.04 0.24 7 1.1 1 #Tests 38 38 38 38 38 38 38 38 38 30 34 36 38 38 37 37 38 30 33 17 Site: SW-06 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Carson River,Stateline ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2019 Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Ca Mg Na SAR Na Total E.coli Strep <-Colonies-> <-Filaments-> <-Filamaments-> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells m /L m /L m /L 81 1,843 1,191 488 50 403 42 312 2 63 6 82 83 4,216 1,060 843 0 0 20 310 0 0 0 9.67 0.69 26 84 8.06 2.37 3.69 0.29 19.9 4,137 1,724 306 53 9 14 8 783 312 13 8.81 1.85 32 85 9.81 2.83 4.91 0.35 21.3 879 754 83 0 0 7 1 27 2 0 9.34 2.09 36 86 7.60 2.28 3.54 0.28 19.5 2,082 522 318 0 0 2 98 139 5 4,178 9.54 9.08 30 87 10.29 3.43 5.58 0.38 22.3 1,009 639 251 0 0 46 577 115 4 1,339 9.37 6.64 35 88 11.73 3.73 6.26 0.40 22.2 666 288 176 0 0 0 0 369 13 554 10.78 6.01 89 10.19 3.09 5.18 0.35 21.3 669 465 286 0 0 0 0 392 167 11,149 10.69 5.34 90 10.95 3.36 5.41 0.36 21.2 1,074 178 318 0 0 0 0 0 0 222 8.43 5.71 46 91 10.65 4.74 5.30 0.34 19.6 774 181 65 0 0 0 0 0 0 0 8.75 5.60 41 92 10.53 2.99 5.02 0.34 20.9 516 101 60 0 0 0 0 0 0 0 9.26 5.60 30 93 8.11 2.21 4.06 0.32 21.4 2,450 1,088 60 0 0 0 0 0 0 0 9.93 4.49 27 94 9.48' 2.58 5.12 0.37 23.2 3,094 315 540 0 0 0 0 0 0 0 9.43 5.65 34 95 7.75 2.03 3.93 0.31 22.0 580 59 50 0 0 0 0 0 0 0 9.65 4.84 25 96 7.98 2.21 4.03 0.32 21.8 799 205 55 0 0 0 0 0 0 0 8.80 3.19 28 97 8.03 2.54 4.14 0.32 21.5 323 88 230 0 0 0 0 0 0 0 9.65 3.16 29 98 7.50 2.06 4.01 0.33 22.7 333 63 130 0 0 13 72 0 0 0 8.65 2.60 25 99 7.12 2.04 4.10 0.34 23.7 1,799 109 130 0 0 0 0 0 0 0 9.28 2.74 00 7.35 2.33 4.34 0.35 23.6 1,503 119 60 0 0 0 0 0 0 0 9.33 3.05 01 8.33 2.39 4.76 0.37 23.8 681 137 130 0 0 0 0 0 0 0 9.47 2.68 02 7.75 2.27 4.59 0.37 24.3 509 135 58 0 0 0 0 0 0 0 8.85 2.66 03 8.00 2.43 4.59 0.36 23.5 275 72 68 0 0 0 0 0 0 0 8.58 2.69 04 7.59 2.35 4.36 0.35 23.3 794 81 42 0 0 0 0 0 0 0 8.76 2.74 05 7.66 2.22 4.24 0.34 23.1 167 53 26 0 0 0 0 0 0 0 9.14 2.63 O6 6.54 1.84 3.46 0.30 22.6 832 87 29 0 0 0 0 0 0 0 9.58 1.67 07 8.26 2.37 4.85 0.38 24.1 485 210 43 0 0 0 0 0 0 0 8.70 2.62 08 8.42 2.37 4.88 0.38 24.1 267 142 230 0 0 0 0 0 0 0 9.13 3.33 09 8.17 2.31 4.57 0.36 23.5 446 61 26 0 0 0 0 0 0 0 9.30 2.68 10 7.23 2.06 3.91 0.33 22.7 1,305 181 77 0 0 0 0 0 0 0 8.86 2.30 11 6.77 1.96 3.52 0.30 21.7 2,718 1,676 77 0 0 0 0 0 0 0 9.66 1.54 12 8.02 2.12 4.57 0.37 23.9 737 107 12 0 0 0 0 0 0 0 8.49 2.21 13 8.26 2.16 4.38 0.35 23.1 2,391 193 14 0 0 0 0 0 0 0 8.97 2.29 14 8.78 2.37 5.05 0.39 24.4 1,633 206 13 0 0 0 0 0 0 0 9.23 2.84 15 9.15 2.46 5.18 0.39 24.1 1,867 61 10.59 3.01 16 7.98 2.08 4.44 0.36 23.8 1,278 63 11.34 2.61 17 7.13 1.88 3.64 0.31 22.3 437 52 10.57 1.62 18 1,449 104 10.52 2.19 19 1,010 41 10.59 2.31 Maximum 11.73 4.74 6.26 0.40 24.4 4,216 1,724 843 53 403 46 577 783 312 11,149 11.34 9.08 46 Minimum 6.54 1.84 3.46 0.28 19.5 167 41 12 0 0 0 0 0 0 0 8.43 0.69 25 Average 8.45 2.48 4.52 0.35 22.5 1,264 337 160 3 12 4 42 55 17 529 9.45 3.38 32 #Tests 34 34 34 34 34 38 38 33 33 33 33 33 33 33 33 37 37 14 Site: SW-06 Nitrate-Nitrogen Total Phosphorus 0.5 0.5 --- 0.4 0.4 0.3 -- - 0.3co - — -- J J E E 0.2 0.2 -- 0.1 A - - 0.1 - - -- ---- .) 0.0 r., 0.0 eA 41 aP a� -P o^ OA C� o� C� ,^ —�Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 250 9 8 200 - - - — _ ---- --- 7 6 150 - - J J a 5 01 E 4 - 100 - - - - 3 2 50 - -- -- 1 0 0 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 1011 12 13 14 15 1617 18 19 —0 Chlorides Linear(Chlorides) +TDS Linear(TDS) Site: SW-07 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredricksburg Ditch, Upper ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 03/04/19 Dry 04/01/19 Dry 05/08/19 19.8 7.02 49.0 8.7 NV 39 121 5.46 0.191 0.066 0.637 0.033 < 0.010 0.116 06/04/19 19.2 7.21 52.7 7.7 12.4 96 134 5.95 0.264 0.135 1.21 0.629 0.040 0.253 07/09/19 Dry 08/08/19 Dry 09/04/19 Dry 10/03/19 Dry 11/05/19 Dry Maximum 19.8 7.21 52.7 8.7 12.4 96 134 6.0 0.264 0.135 1.21 0.629 0.040 0.253 Minimum 19.2 7.02 49.0 7.7 12.4 39 121 5.5 0.191 0.066 0.637 0.033 < 0.010 0.116 Average 19.5 7.12 50.9 8.2 12.4 68 128 5.7 0.228 0.101 0.924 0.331 0.025 0.185 #Tests 2 2 2 2 1 2 2 2 2 2 0 0 2 2 2 2 Site: SW-07 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredricksburg Ditch, Upper ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Oil & Coliforms Fecal <--------------------------Blue(Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep <------Cc<-----Fila<---FilamCells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 03/04/19 04/01/19 05/08/19 0.753 > 2420 435 7.1 3.01 06/04/19 1.50 8840 1050 7.6 2.22 07/09/19 08/08/19 09/04/19 10/03/19 11/05/19 Maximum 1.50 8,840 1,050 0 0 0 0 0 0 0 7.57 3.01 Minimum 0.753 > 2,420 435 0 0 0 0 0 0 0 7.12 2.22 Average 1.13 5,630 743 7.35 2.62 #Tests 2 0 0 0 0 0 0 0 0 2 2 0 0 0 0 0 0 0 0 2 2 0 Site: SW-07 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredricksburg Ditch,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2019 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NOZ-N NO3-N Total N COD BOD Grease Year C pH mg/L NTU m /L m /L umhos m /L m /L m /L m /L m /L m /L m /L m /L m /L m /L m /L m /L m /L 81 13.1 7.50 69 1.60 1 175• 250 0.05 0.03 3.20 0.39 0.05 0.61 7 1 < 1 82 11.8 7.54 73 6.78 26 139 182 24.5 0.13 0.09 4.90 0.80 0.03 1.03 28 1 < 1 83 18.0 7.63 68 2.35 5 128 165 10.2 0.07 0.05 4.44 0.69 0.09 <0.01 0.09 0.80 23 2 < 1 84 15.0 7.63 59 4.30 11 95 155 9.7 0.11 0.05 3.33 0.44 0.09 0.01 0.24 0.69 12 1 < 1 85 16.0 7.51 60 2.60 5 113 174 11.6 0.09 0.03 3.70-: 0.59 0.10 0.01 0.04 0.64 17 1 < 1 86 12.5 7.79 70 5.07 4 125 171 8.4 0.09 0.02 4.10 0.51 0.07 0.01 0.16 0.68 17 1 < 1 87 16.3 7.61 86 5.75 19 176 267 20.8 0.20 <0.01 6.75 1.32 0.20 <0.01 0.22 1.55 36 5 < 1 88 13.1 7.31 70 4.32 8 158 232 19.9 0.07 0.02 5.32 0.78 0.08 0.01 0.12 0.91 15 2 1 89 17.6 7.39 72 12.08 26.0 _166 257 27.9 0.21 0.03 5.22 0.94 0.08 <0.01 0.14 1.09 16 2.0 < 1 90 9.6 7.46 68 3.13 6.0 158 292 34.5 0.06 0.02 0.03 3.42 0.24 0.03 <0.01 0.31 0.56 6 1.2 < 1 91 14.3 7.22 69 2.96 12.6 198 262 42.2 0.17 0.06 0.04 4.48 0.64 0.09 0.04 0.63 1.31 21 2.2 < 1 92 11.9 7.40 82 2.63 6.0 244 344 48.1 0.25 0.15 0.05 7.73 1.26 0.03 0.02 0.28 1.56 3 3.3 < 1 93 14.0 7.12 72 4.20 7.4 166 243 26.3 0.21 0.13 0.03 5.32 0.84 0.03 0.02 0.44 1.30 18 1.8 2 94 10.8 7.87 80 2.30 19.0 240 313 33.4 0.12 0.03 0.02 3.63 0.95 0.03 0.01 0.44 1.39 10 4.0 < 1 95 18.3 6.90 63 3.37 4.7 122 147 5.9 0.17 0.10 0.03 4.70 1.00 0.04 0.01 0.06 1.06 2.0 1 96 21.2 7.03 76 5.20 5.5 140 199 11.6 0.19 0.10 0.03 4.80 1.01 0.04 0.02 0.27 1.29 2.0 1 97 19.6 7.44 64 7.00 54.0 129 155 7.2 0.24 0.08 0.04 3.70 1.16 0.05 0.01 0.07 1.24 34 4.5 1 98 17.0 7.04 60 3.40 6.4 114 144 5.9 0.13 0.07 0.03 3.55 0.73 0.03 0.01 0.13 0.87 1.7 < 1 99 20.0 7.15 87 2.50 3.8 159 208 7.6 0.12 0.08 0.03 4.51 0.67 0.03 <0.01 0.41 1.10 1.1 00 15.7 7.11 64 24.23 40.5 143 193 14.3 0.46 0.21 0.07 6.83 1.65 0.32 0.05 0.63 2.33 3.4 01 16.6 7.21 72 7.48 5.2 146 223 18.1 0.24 0.22 0.04 5.30 1.43 0.04 0.09 0.78 2.30 1.0 02 14.9 7.43 82 5.52 4.0 148 212 14.9 0.14 0.05 0.04 4.60 0.63 0.04 <0.01 0.34 0.97 1.1 03 14.5 7.54 67 7.69 11.7 143 194 14.4 0.23 0.13 0.05 4.33 0.84 0.18 0.04 0.52 1.40 27 2.1 04 14.0 7.41 48 12.75 26.0 133 183 13.6 0.08 0.06 0.03 5.03 0.77 0.19 0.01 0.38 1.15 25 2.0 05 14.7 6.87 65 7.28 8.7 149 184 17.4 0.31 0.22 0.05 4.62 1.11 0.44 0.07 0.50 1.68 34 2.6 O6 16.3 7.18 68 4.45 5.3 115 131 5.9 0.15 0.05 0.04 3.04 0.75 0.13 0.01 0.14 0.90 1.5 07 15.3 7.53 77 4.92 8.6 149 212 16.1 0.14 0.07 0.04 4.80 0.55 0.25 0.03 0.93 1.51 24 1.7 08 7.9 7.51 50 43.00 71.3 114 140 7.3 0.40 0.14 0.02 8.66 1.32 0.08 0.01 0.10 1.43 8.9 09 14.1 7.68 89 20.73 32.5 167 229 15.6 0.16 0.02 0.03 5.82 0.83 0.03 <0.01 0.23 1.07 2.6 10 11.8 7.38 75 82.48 75.3 147 211 14.9 0.37 0.03 0.03 5.54 0.72 0.03 <0.01 0.63 1.36 1.9 11 12.4 7.52 62 49.62 85.3 114 148 6.8 0.44 0.06 0.03 5.81 1.23 0.07 0.02 0.17 1.42 21 2.7 12 20.6 7.11 70 9.50 13.7 153 257 16.5 0.27 0.14 0.04 5.56 3.25 2.10 0.02 1.07 4.34 5.0 13 14.6 7.12 74 7.50 5.9 148 197 12.4 0.22 0.04 0.03 4.75 1.05 0.05 0.02 0.47 1.52 2.9 14 8.8 7.13 81 5.13 5.6 170 247 19.2 0.13 0.04 0.04 6.13 0.60 0.05 <0.01 0.97 1.57 1.7 15 13.7 7.24 106 2.80 3.1 170 274 23.5 0.09 0.05 0.05 3.93 0.40 0.02 <0.02 1.28 1.68 16 Dry 17 14.5 7.19 65 2.50 2.5 120 153 5.4 0.13 0.05 5.26 0.65 0.03 <0.01 0.07 0.72 18 15.5 7.55 62 2.80 1.9 106 128 1.8 0.13 0.04 0.53 <0.01 0.03 0.56 19 19.5 7.12 51 8.2 12.4 68 128 5.7 0.23 0.10 0.92 0.33 0.03 0.18 1.13 Maximum 21.2 7.87 106 82.48 85.3 244 344 48.1 0.46 0.22 0.09 8.66 3.25 2.10 0.09 1.28 4.34 36 8.9 2 Minimum 7.9 6.87 48 1.60 1.0 68 128 1.8 0.05 0.02 0.01 3.04 0.24 0.02 <0.01 0.03 0.56 3 1.0 < 1 Average 14.9 7.35 70 10.27 17.1 146 205 16.2 0.18 0.09 0.04 4.91 0.90 0.15 0.02 0.37 1.28 20 2.4 1 #Tests 38 38 38 38 38 38 38 37 38 29 35 36 38 37 36 36 38 20 34 18 Site: SW-07 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream:. Fredricksburg Ditch,Upper ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2019 Coliforms Fecal/ Fecal < Blue Green Algae- > Single Hard- Ca Mg Na SAR Na Total E.coli Strep <-Colonies-> <--Filaments-> <-Filamaments-> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells m /L mg/L mg/L 81 1,120 763 216 56 193 13 90 3 46 10 82 5,380 1,608 3,306 126 930 104 1,122 4 84 92 83 6,700 5,965 2,515 5 10 65 780 35 920 20 7.75 2.16 61 84 15.33 3.20 8.93 0.52 24.2 1,500 958 1,355 2 1 5 2 142 7 72 8.63 12.43 53 85 14.47 3.48 10.73 0.62 26.9 9,110 1,343 843 0 0 0 0 277 2 0 7.70 3.31 50 86 15.67 3.89 9.33 0.57 25.4. 17,533 3,133 710 0 0 0 0 0 0 369 7.63 < 10.00 60 87 24.00 5.85 17.50 0.85 28.2 >24,000 17,500 5,545 0 0 0 0 0 0 277 7.05 13.43 86 88 22.50 6.03 12.50 0.60 23.6 7,966 3,872 998 0 0 0 0 0 0 277 10.81 13.23 89 23.40 6.05 15.80 0.72 26.3 10,688 9,065 8,498 0 0 0 0 0 0 1,708 8.93 15.53 90 26.00 6.78 14.36 0.64 24.5 1,646 510 183 0 0 0 0 0 0 0 8.80 17.88 78 91 27.60 6.82 19.64 0.85 28.3 12,366 7,696 430 0 0 21 648 0 0 0 7.47 18.75 48 92 28.67 7.40 26.67 1.17 33.7 11,810 9,677 90 0 0 0 0 0 0 0 7.90 25.01 122 93 23.00 5.78 16.76 0.80 29.0 13,640 6,136 230 0 0 0 0 0 0 0 7.64 13.46 64 94 23.00 5.67 13.10 0.64 26.5 4,053 630 260 0 0 0 0 0 0 0 10.90 17.63 99 95 16.67 4.00 7.80 0.44 20.9 12,167 9,677 0 0 0 0 0 0 0 6.72 6.97 96 18.00 4.20 12.50 0.69 28.3 24,000 17,500 0 0 0 0 0 0 0 7.95 8.27 97 16.00 4.15 10.25 0.59 26.5 17,500 5,515 4,600 0 0 0 0 0 0 0 8.08 7.31 53 98 12.50 3.24 10.70 0.70 32.2 4,600 2,400 0 0 0 0 0 0 0 9.00 4.00 99 19.95 4.23 14.30 0.79 30.7 7,800 3,050 0 0 0 0 0 0 0 5.35 5.96 00 13.36 4.66 17.17 1.03 37.3 11,067 10,333 0 0 0 0 0 0 0 7.40 8.25 01 16.30 4.23 19.75 1.13 39.1 5,620 5,620 0 0 0 0 0 0 0 8.85 7.14 02 19.17 4.95 17.50 0.92 33.7 1,187 540 0 0 0 0 0 0 0 8.69 7.04 03 15.36 4.23 13.77 0.79 32.4 4,875 2,783 240 0 0 9 528 11 0 0 7.33 5.08 04 10.49 3.45 9.01 0.62 29.5 7,800 5,620 240 0 0 0 0 0 0 0 7.58 7.13 05 13.55 3.74 15.52 0.94 34.7 2,538 2,040 230 0 0 0 0 0 0 0 7.90 5.42 O6 15.05 3.50 9.01 0.54 26.1 965 680 0 0 0 0 0 0 0 8.57 2.12 07 16.48 4.72 19.37 1.08 37.5 3,578 790 93 0 0 0 0 0 0 0 7.94 6.32 08 11.70 4.18 10.70 0.68 28.8 2,400 2,400 0 0 0 0 0 0 0 7.08 4.93 09 19.47 5.90 17.73 0.90 32.3 7,643 3,820 0 0 0 0 0 0 0 9.86 7.30 10 16.90 6.13 14.69 0.78 29.4 4,325 3,958 0 0 7 83 0 0 0 7.68 6.87 11 12.63 4.71 10.73 0.66 29.1 5,666 5,524 43 0 0 0 0 0 0 0 8.45 2.32 12 16.87 4.87 19.77 1.10 38.4 11,000 7,643 0 0 9 297 0 0 0 7.43 24.37 13 16.70 4.29 15.28 0.86 33.4 4,733 3,690 90 0 0 0 0 0 0- 0 7.90 8.43 14 19.07 5.18 20.87 1.09 36.9 7,477 4,443 0 0 0 0 0 0 0 7.23 9.46 15 20.85 5.46 23.75 1.20 39.4 2,755 317 7.81 10.55 16 17 14.97 3.66 9.34 0.55 24.9 8,041 304 9.08 1.98 18 2,682 387 7.96 1.81 19 5,630 743 7.35 2.62 Maximum 28.67 7.40 26.67 1.20 39.4 >24,000 17,500 8,498 126 930 104 1,122 277 920 1,708 10.90 25.01 122 Minimum 10.49 3.20 7.80 0.44 20.9 965 304 43 0 0 0 0 0 0 0 5.35 1.81 48 Average 18.05 4.81 14.69 0.79 30.2 7,725 4,438 1,463 6 33 7 104 14 31 83 8.07 9.01 70 #Tests 33 33 33 33 33 38 38 21 34 34 34 34 34 34 34 36 36 11 Site : SW-07 Nitrate-Nitrogen Total Phosphorus 1.5 1.0 1.4 0.9 1.3 1.2 4 0.8 1.1 0.7 1.0 0.9 0.6 E 0 8 E 0.5 - 0.6 0.4 0.5 0.3 0.4 0.3 0.2 0.2 1 A 1 11 W V 0.1 0.1 0.0 0.0 0 dA t Nitrate Linear(Nitrate) ---9 —Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 100 500 90 80 400 70 60 300 J J rn 50 p� E 40 E 200 AA 30 20 100 10 0 0 a^ oN 0 %A qP e` Ip 10 eA � o^ o� c$ o� COIN O N% * 0 e^ � �` ebA so a^ a� a� a� �' o` op 05 4 c$ ^` ^� ^°' �� 0 +Chlorides Linear(Chlorides) +TDS Linear(TDS) Site: SW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Irrigation Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 03/04/19 12.6 6.80 39.0 0.80 0.45 134 108 2.72 0.098 0.040 1.07 < 0.020 < 0.010 < 0.010 04/01/19 14.0 7.33 66.4 1.8 0.68 141 149 1.98 0.069 0.034 0.872 < 0.020 < 0.010 < 0.010 05/08/19 Dry 06/04/19 Dry 07/09/19 26.8 8.74 48.3 0.75 0.56 107 94.9 1.14 0.154 0.112 0.779 0.041 0.010 0.060 07/18/19 Coliform Bacterial Sample Only 08/08/19 18.6 7.54 73.3 1.4 2.84 126 152 1.55 0.062 0.020 0.479 < 0.020 < 0.010 0.031 09/04/19 16.9 7.62 73.5 1.4 10.5 123 167 1.58 0.165- < 0.010 0.654 < 0.020 < 0.010 0.013 10/03/19 10.1 7.64 64.0 3.2 14.2 105 131 1.69 0.081 0.010 0.515 < 0.020 < 0.010 0.058 11/05/19 6.9 7.38 61.7 20 50.8 100 132 1.86 0.140 0.012 1.17 0.025 < 0.010 0.163 Maximum 26.8 8.74 73.5 20 50.8 . 141 167 2.72 0.165 0.112 1.17 0.041 0.010 0.163 Minimum 6.9 6.80 39.0 0.75 0.45 100 94.9 1.14 0.062 < 0.010 0.479 < 0.020 < 0.010 < 0.010 Average 15.1 7.58 60.9 4.2 11.4 119 133 1.79 0.110 0.034 0.791 0.024 0.010 0.049, #Tests 7 7 7 7 7 7 7 7 7 7 0 0 7 7 7 7 Site: SW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Irrigation Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Oil & Coliforms Fecal<----------=---------------Blua Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filaments Filaman Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 03/04/19 1.07 236 10.8 4.91 9.73 04/01/19 0.872 517 3.1 6.94 4.08 05/08/19 06/04/19 07/09/19 0.839 4.12 4.26 07/18/19 5,170 5.2 08/08/19 0.510 6,150 -308 6.48 3.49 09/04/19 0.667 6,130 8.6 7.11 3.68 10/03/19 0.573 3,260 6.2 7.35 4.75 11/05/19 1.33 > 2,420 2.0 9.78 6.22 Maximum 1.33 6,150 308 0 0 0 0 0 0 0 9.78 9.73 Minimum 0.510 236 2.0 0 0 0 0 0 0 0 4.12 3.49 Average 0.837 3,412 49 6.67 5.17 #Tests 7 0 0 0 0 0 0 0 0 7 7 0 0 0 0 0 0 0 0 7 7 0 Site: SW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Irrigation Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2019 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO,-P Boron K TKN NH3-N NO2-N NO3-N Total N GOD BOD Grease Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L m /L m /L m /L m /L m /L m /L m /L m /L 81 13.2 7.72 61 2.24 17 116 134 0.04 0.02 2.51 0.37 0.03 0.50 13 1 < 1 82 15.3 7.53 57 2.40 8 98 119 0.04 0.04 2.16 0.47 0.02 0.70 17 1 < 1 83 13.8 7.72 56 3.62 12 96 117 1.4 0.11 0.04 2.33 0.38 0.06 0.01 0.10 0.49 13 1 < 1 84 14.2 7.56 57 4.59 18 88 114 1.1 0.12 0.05 2.51 0.39 0.07 <0.01 0.15 0.55 10 1 < 1 85 14.2 7.63 57 3.53 21 85 116 1.9 0.12 0.15 2.63 0.38 0.06 <0.01 0.11 0.49 13 1 < 1 86 12.4 7.63 55 3.52 18 89 111 1.3 0.13 0.02 2.50 0.38 0.05 <0.01 0.19 0.57 14 1 2 87 13.4 7.28 57 2.48 13 93 119 1.8 0.10 0.02 2.28 0.32 0.03 <0.01 0.14 0.48 10 1 < 1 88 12.7 7.63 55 3.03 19 95 117 1.3 0.07 0.01 1.98 0.40 0.04 <0.01 0.16 0.58 8 1 < 1 89 13.7 7.49 53 2.79 12.9 94 118 1.5 0.08 0.02 2.17 0.45 0.06 <0.01 0.12 0.58 12 1.5 < 1 90 14.1 7.56 54 4.01 23.5 102 111 1.2 0.09 0.03 0.03 2.18 0.44 0.03 <0.01 0.16 0.61 16 1.4 < 1 91 15.0 7.28 57 2.19 8.3 98 122 1.3 0.05 0.02 0.02 2.21 0.36 0.04 0.01 0.16 0.54 18 1.1 1 92 14.5 7.53 54 2.44 12.7 96 122 1.3 0.07 0.02 0.02 2.19 0.46 0.03 0.01 0.13 0.60 14 1.3 < 1 93 13.2 7.59 55 2.78 13.7 99 124 1.6 0.07 0.02 0.02 2.36 0.42 0.03 0.01 0.32 0.75 14 1.2 < 1 94 13.3 7.40 49 2.87 11.3 96 127 1.6 0.08 0.02 0.02 2.40 0.50 0.03 0.01 0.35 0.86 6 1.3 < 1 95 13.7 7.42 60 1.80 9.1 104 129 1.7 0.07 0.02 0.02 2.08 0.48 0.02 0.01 0.34 0.84 7 1.5 1 96 14.5 7.62 55 4.89 22.7 96 118 1.5 0.10 0.03 0.02 2.14 0.44 0.03 0.01 0.33 0.78 5 1.4 1 97 13.6 7.66 52 4.25 20.4 97 109 1.8 0.10 0.04 0.02 2.63 0.40 0.03 0.01 0.40 0.81 12 1.8 1 98 13.7 7.23 52 3.42 27.2 91 109 1.8 0.09 0.02 0.01 2.38 0.42 0.02 <0.01 0.26 0.69 6 1.1 < 1 99 15.6 7.31 49 3.08 17.8 90 111 1.6 0.07 0.02 0.01 2.30 0.44 0.02 <0.01 0.27 0.72 9 1.0 00 13.9 7.13 49 3.37 33.6 91 109 1.6 0.09 0.02 0.02 2.16 0.46 0.03 <0.01 0.20 0.66 17 1.1 01 15.8 7.45 55 5.24 15.4 98 122 1.9 0.16 0.03 0.02 2.42 0.40 0.03 <0.01 0.16 0.56 14 0.7 02 16.0 ' 7.32 60 3.70 20.2 100 127 1.6 0.06 0.02 0.02 2.24 0.39 0.05 <0.01 0.12 0.52 10 0.9 03 13.1 7.46 57 6.40 19.0 97 114 1.6 0.06 0.02 0.02 2.30 0.47 0.03 <0.02 0.13 0.62 15 0.8 04 17.2 7.52 58 15.68 40.1 98 122 1.8 0.13 0.02 0.03 2.70 0.79 0.04 <0.01 0.17 0.97 19 1.9 05 .14.1 7.13 54 4.31 10.1 101 105 1.5 0.05 0.03 0.02 2.05 0.45 0.03 <0.01 0.09 0.55 9 1.3 O6 16.7 6.97 58 2.55 4.7 103 112 1.5 0.09 0.03 0.02 2.21 0.36 0.04 <0.01 0.03 0.40 12 1.6 07 13.8 7.43 57 6.78 18.0 102 125 1.7 0.07 0.02 0.02 3.05 0.46 0.03 <0.01 0.06 0.53 22 1.2 08 16.2 7.56 55 11.24 28.3 100 113 1.8 0.10 0.02 0.01 2.60 0.70 0.02 <0.01 0.02 0.72 22 1.7 09 14.3 7.39 53 13.06 45.5 100 115 1.5 0.10 0.02 0.01 2.53 0.90 0.03 <0.01 0.05 0.96 28 1.5 10 12.7 7.15 46 4.98 14.1 94 104 1.6 0.07 0.02 0.01 2.62 0.61 0.04 <0.01 0.04 0.66 35 1.6 11 15.4 7.45 52 7.60 14.7 101 108 1.5 0.09 0.02 0.01 2.94 0.68 0.02 0.01 0.03 0.72 19 2.0 12 16.2 6.93 60 7.77 16.1 101 125 1.5 0.07 0.01 0.02 2.43 0.56 0.03 <0.01 0.03 0.59 1.5 13 14.6 7.11 64 5.43 18.7 114 133 1.7 0.09 0.02 0.02 3.06 0.59 0.03 <0.01 0.01 0.59 1.2 14 11.4 7.03 58 9.56 29.4 109 131 1.9 0.23 0.02 0.02 3.75 0.90 0.04 0.02 0.01 0.91 2.2 15 13.6 6.84 57 26.90 92.3 126 143 2.4 0.47 0.03 0.01 3.71 1.38 0.08 <0.01 0.02 1.39 16 13.4 6.58 68 2.26 7.4 136 146 1.6 0.12 0.05 3.58 0.87 0.02 <0.01 0.02 0.88 17 15.3 6.76 71 5.46 22.7 147 165 2.4 0.14 0.04 3.30 1.23 0.03 <0.01 0.02 1.24 18 12.5 7.29 48 0.90 1.6 134 132 3.2 0.07 0.02 1.45 <0.02 <0.01 <0.01 1.45 19 15.1 7.58 61 4.19 11.4 119 133 1.8 0.11 0.04 0.79 <0.02 <0.01 0.05 0.84 Maximum 17.2 7.72 71 26.9 92.3 147 165 3.2 0.47 0.05 0.15 3.75 1.45 0.08 0.02 0.40 1.45 35 2.2 2 Minimum 11.4 6.58 46 0.90 1.6 85 104 1.1 0.04 0.01 0.01 1.98 0.32 0.02 <0.01 <0.01 0.40 5 0.7 < 1 Average 14.2 7.36 56 5.3 19.7 102 121 1.7 0.10 0.02 0.02 2.53 0.57 0.03 0.01 0.13 0.72 14 1.3 1 #Tests 39 39 39 39 39 39 39 37 39 30 35 37 39 39 37 37 39 31 34 18 Site: SW-08 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Irrigation Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA From: 1981 To: 2019 Coliforms Fecal/ Fecal <------- Blue Green Algae-- - > Single Hard- Ca Mg Na SAR Na Total E.coli Strep <-Colonies-> <-Filaments-> <-Filamaments-> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells m /L m /L m /L 81 2,064 752 392 18 75 61 424 4 160 15 82 6,870 1,963 381 36 95 67 438 8 205 45 83 1,785 672 132 10 20 37 385 30 1,852 20 8.02 2.50 46 84 10.55 2.66 8.28 0.59 30.6 3,100 893 409 74 2 5 21 517 718 7 7.70 1.52 40 85 11.03 2.64 8.51 0.60 30.6 2,463 471 207 0 0 0 0 185 5 0 7.53. 1.01 40 86 10.49 3.05 6.59 0.46 25.4 1,830 407 546 0 0 0 0 115 3 646 7.64 9.25 38 87 11.23 2.71 8.28 0.66 29.9 891 669 213 0 0 23 508 69 3 4,778 7.90 6.12 40 88 11.55 2.81 8.77 0.60 30.7 3,368 496 300 0 0 0 0 25 0 201 8.94 5.01 89 10.73 2.58 8.02 0.56 30.0 5,282 2,973 4,245 0 0 0 0 69 3 324 7.42 5.79 90 11.53 2.66 8.88 0.60 31.1 3,842 1,739 4,354 0 0 0 0 0 0 0 6.90 6.53 41 91 11.70 2.82 7.68 0.52 27.6 3,651 203 130 0 0 0 0 0 0 0 7.16 6.70 41 92 11.46 2.58 8.45 0.58 30.2 6,618 844 220 0 0 0 0 0 0 0 7.62 7.07 44 93 12.12 2.83 8.80 0.59 29.5 2,638 114 80 0 0 0 0 0 0 0 8.10 6.95 37 94 13.42 3.13 9.35 0.59 29.7 2,548 309 580 0 0 6 8 0 0 0 7.49 7.01 39 95 12.40 2.77 9.72 0.65 31.9 2,694 651 1,315 0 0 0 0 0 0 0 8.03 6.13 43 96 10.98 2.59 8.99 0.63 32.3 3,420 2,091 994 0 0 0 0 0 0 0 7.55 2.86 7 97 11.18 2.73 8.50 0.58 30.3 3,222 1,518 330 0 0 0 0 0 0 0 8.03 3.86 38 98 10.28 2.46 8.62 0.62 32.3 2,963 1,336 390 0 0 0 0 0 0 0 8.08 3.87 40 99 9.79 2.48 8.99 0.66 33.5 4,543 2,312 160 0 0 0 0 0 0 0 7.49 4.41 00 9.06 2.57 8.12 0.61 32.4 5,586 2,661 160 0 0 0 0 0 0 0 8.69 4.55 01 10.38 2.81 9.42 0.68 33.8 5,100 3,388 580 0 0 0 0 0 0 0 7.53 4.87 02 11.66 2.73 9.96 0.68 33.5 3,269 1,263 152 0 0 8 59 0 0 0 6.44 4.48 03 12.29 3.09 10.71 0.70 33.6 2,217 577 235 0 0 0 0 0 0 0 7.32 4.29 04 11.05 2.87 8.96 0.62 31.2 2,809 374 92 0 0 4 70 0 0 0 6.35 5.06 05 10.59 2.59 9.18 0.65 33.3 4,024 1,152 230 0 0 0 0 0 0 0 6.63 4.94 06 11.36 2.60 9.80 0.69 33.9 1,469 595 43 0 0 0 0 0 0 0 6.37 3.26 07 11.57 2.79 10.01 0.69 33.0 1,632 161 227 0 0 0 0 0 0 0 6.84 5.59 08 10.91 2.72 9.50 0.66 32.7 3,643 3,020 255 0 0 0 0 0 0 0 6.32 4.62 09 10.73 2.67 9.75 0.69 33.8 5,688 3,828 772 0 0 0 0 0 0 0 6.33 5.64 10 9.29 2.43 8.59 0.64 32.8 5,976 5,544 1,500 0 0 0 0 0 0 0 6.55 5.39 11 9.72 2.65 8.94 0.66 32.2 6,224 2,917 93 0 0 0 0 0 0 0 6.32 3.42 12 11.41 2.75 9.94 0.69 33.6 2,255 592 54 0 0 0 0 0 0 0 5.88 3.33 13 12.75 2.94 10.78 0.72 33.8 3,154 1,910 20 0 0 0 0 0 0 0 5.33 3.96 14 11.93 2.87 10.50 0.73 34.0 4,463 3,090 277 0 0 0 0 0 0 0 6.28 5.03 15 12.74 3.14 12.00 0.82 36.1 5,301 407 5.53 8.48 16 13.62 3.25 12.45 0.81 35.3 31,343 9,684 6.86 3.68 17 14.74 3.53 14.18 0.90 37.5 8,197 286 6.76 4.48 18 261 2 8.08 8.52 19 3.410 49 6.67 5.17 Maximum 14.74 3.53 14.18 0.90 37.5 31,343 9,684 4,354 74 95 67 508 517 1,852 4,778 8.94 9.25 46 Minimum 9.06 2.43 6.59 0.46 25.4 261 2 20 0 0 0 0 0 0 0 5.33 1.01 7 Average 11.36 2.78 9.39 0.65 32.1 4,354 1,587 590 4 6 6 56 30 87 178 7.15 5.01 38 #Tests 34 34 34 34 34 39 39 34 34 34 34 34 34 34 34 37 37 14 Site : SW-08 Nitrate-Nitrogen ! Total Phosphorus 0.5 0.5 0.4 0.4 0.3 0.3 J J 0.2 0.2 0.1 - 0.1 0.0 0.0 --�Nitrate Linear(Nitrate) Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 250 9 8 200 7 6 150 J J 6 5 0► 4 E 100 A AL 3 2 A 50 1 0 0 81 a2 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 1617 18 19 19' 00 0b 4Z;' o;' CSC 01 0°' +Chlorides Linear(Chlorides) —w—TDS Linear(TDS) IRRIGATION DITCHES i Site: SW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: ICR Effluent ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 03/07/19 3.8 7.44 - 60 71 1.23 0.060 0.010 0.470 < 0.020 < 0.010 0.022 Maximum 3.8 7.44 60 71 1.23 0.060 0.010 0.470 < 0.020 < 0.010 0.022 Minimum 3.8 7.44 60 71 1.23 0.060 0.010 0.470 < 0.020 < 0.010 0.022 Average 3.8 7.44 60 71 1.23 0.060 0.010 0.470 < 0.020 < 0.010 0.022 #Tests 1 1 0 0 0 1 1 1 1 1 0 0 1 1 1 1 Site: SW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: ICR Effluent ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Oil & Coliforms Fecal <-Blue Green Algae-> Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep colonies Filaments Filamame Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 03/07/19 0.492 11.2 1.33 Maximum 0.492 0 0 0 0 0 0 0 11.2 1.33 Minimum 0.492 0 0 0 0 0 0 0 11.2 1.33 Average 0.492 11.2 1.33 #Tests 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 Site: SW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: ICR Effluent ALPINE COUNTY SURFACEWATER QUALITY DATA From: 2000 To: 2019 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 00 5.2 7.22 103 0.060 01 7.0 .7.46 51 8.31 9.4 78 109 1.4 0.060 <0.010 0.01 2.15 0.680 <0.100 <0.010 <0.010 0.700 02 8.1 6.74 8.20 4.9 110 1.7 0.040 <0.010 0.680 0.050 <0.010 <0.010 0.700 22 03 8.4 7.72 5.05 14.8 86 1.7 0.040 0.010 0.777 0.022 0.010 0.010 0.797 04 No samples collected 05 6.2 7.78 45 7.05 5.6 69 96 2.1 0.037 <0.010 0.586 0.028 <0.010 0.060 0.656 06 No samples collected 07 10.3 7.86 46 11.7 71 106 1.5 0.073 <0.010 0.650 0.033 <0.010 <0.010 0.670 23 08 7.5 8.31 54 6.2 83 113 2.0 0.068 0.012 1.100 0.082 <0.010 0.172 1.282 33 09 No samples collected 10 8.7 8.00 52 7.3 79 114 2.0 0.058 <0.010 1.510 0.027 <0.010 <0.010 1.530 11 No samples collected 12 No samples collected 13 No samples collected 14 9.0 7.82 50 2.00 3.5 71 94 1.3 0.035 <0.010 2.26 0.787 0.020 <0.010 <0.010 0.787 15 No samples collected 16 No samples collected 17 No samples collected 18 No samples collected 19 3.8 7.44 60 71 1.2 0.060 0.010 0.470 <0.020 <0.010 0.022 0.492 Maximum 10.3 8.31 54 8.31 14.8 83 114 2.1 0.073 0.012 0.01 2.26 1.510 - 0.100 0.010 0.172 1.530 33 Minimum 3.8 6.74 45 2.00 3.5 60 71 1.2 0.035 <0.010 0.01 2.15 0.470 <0.020 <0.010 <0.010 0.492 22 Average 7.4 7.64 50 6.12 7.9 73 100 1.6 0.053 0.010 0.01 2.21 0.804 0.042 0.010 0.035 0.846 26 #Tests 10 10 6 5 8 7 10 9 10 9 1 2 9 9 9 9 9 3 0 0 Site: SW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: ICR Effluent ALPINE COUNTY SURFACEWATER QUALITY DATA From: 2000 To: 2019 Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Ca Mg Na SAR Na Total E.coli Strep -Colonies- <-Filaments-> <-Filamaments-> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells m /L m /L mg/L 00 01 12.00 2.02 6.62 0.47 26.0 17 < 17 4.28 02 03 10.85 4.06 04 05 10.80 2.08 06 07 3 <3 10.11 2.73 08 8 <2 11.29 4.38 09 10 13 <2 4.08 11 12 13 14 10.20 2.42 7.03 0.51 28.5 29 < 1 9.28 2.50 15 16 17 18 19 11.2 1.33 Maximum 12.00 2.42 7.03 0.51 28.5 29 17 0 0 0 0 0 0 0 11.29 4.38 Minimum 10.20 2.02 6.62 0.47 26.0 3 < 1 0 0 0 0 0 0 0 9.28 1.33 Average 11.10 2.22 6.83 0.49 27.3 14 5 10.59 3.18 #Tests 2 2 2 2 2 5 5 0 0 0 0 0 0 0 0 6 8 0 Site : SW-11 Nitrate-Nitrogen Total Phosphorus 05 k 0.5 - 04 } 0.4 0.3 I 0.3 J J E E 0.2 0.2 0.1 0.1 0.0 0.0 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 —G—Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 200 9 8 150 - 7 6 rn 5 a 100 E E 4 3 - -- 50 - 2 0 01V 1 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 —�Chlorides Linear(Chlorides) TDS Linear(TDS) Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25"above Fredericksburg Ditch 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 05/08/19 17.8 8.35 219 473 50.9 2.26 2.07 18.0 18.2 0.259 0.872 06/04/19 18.8 8.22 226 468 52.8 2.34 1.99 18.1 16.7 0.372 0.931 07/09/19 20.1 8.35 238 587 57.3 2.57 2.42 19.3 17.3 0.666 1.52 08/08/19 21.6 8.28 263 �526 56.7 3.38 3.12 13.6 12.8 1.16 2.77 09/04/19 19.9 8.18 293 654 62.0 4.13 3.54 16.7 15.7 1.13 2.66 10/03/19 9.1 8.22 303 641 72.2 3.58 3.26 24.3 20.5 0.725 4.10 Maximum 21.6 8.35 303 654 72.2 4.13 3.54 24.3 20.5 1.16 4.10 Minimum 9.1 8.18 219 468 50.9 2.26 1.99 13.6 12.8 0.259 0.872 Average 17.9 8.27 257 558 58.7 3.04 2.73 18.3 16.9 0.719 2.14 #Tests . 6 6 0 0 0 6 6 6 6 6 0 0 6 6 6 6 Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25"above Fredericksburg Ditch 2019 Oil & Coliforms Fecal <--Blue Green Algae--> Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonie£Filament Filamai Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 05/08/19 19.1 8.37 13.0 06/04/19 19.4 8.07 12.7 07/09/19 21.5 5.20 13.6 08/08/19 17.5 7.25 14.2 09/04/19 20.5 7.44 15.5 10/03/19 29.1 6.83 17.8 Maximum 29.10 8.37 17.8 Minimum 17.50 5.20 12.7 Average 21.18 7.19 14.5 #Tests 6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 6 0 Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25"above From: 2001 Fredericksburg Ditch To: To: 2019 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Year C pH mg/L NTU m /L m /L umhos m /L m /L m /L mg/L m /L m /L m /L m /L m /L m /L m /L m /L m /L 01 18.6 8.23 243 489 62.2 2.69 2.56 15.37 13.97 0.59 1.44 17.39 03 17.5 8.01 296 436 57.2 2.48 2.26 11.48 9.00 1.97 2.78 16.23 03 17.0 7.93 241 465 58.2 2.56 2.35 13.92 11.50 0.71 2.77 17.40 04 17.7 8.16 243 490 61.8 3.13 2.95 14.48 13.51 0.68 2.89 18.04 05 16.1 7.83 217 361 39.1 2.37 2.32 10.14 9.17 0.55 1.78 12.47 O6 17.5 8.24 229 438 47.4 2.57 2.40 14.26 13.12 0.53 1.69 16.52 07 18.2 8.26 270 503 56.0 3.19 2.90 16.92 14.24 0.63 1.22 18.77 08 17.4 8.25 254 470 54.7 3.31 2.99 12.68 10.19 0.88 2.58 16.13 09 20.2 8.38 259 503 53.6 3.40 .3.20 13.13 12.17 1.15 2.24 9.91 10 17.5 8.25 257 483 53.6 3.14 2.95 12.00 9.95 1.15 2.93 16.07 11 18.2 8.35 205 388 43.7 1.99 1.90 8.30 6.11 1.46 3.34 13.11 12 20.6 8.45 256 468 52.6 2.98 2.73 11.91 9.27 1.82 4.21 17.94 13 18.0 8.02 252 448 50.6 2.65 2.54 11.85 9.59 0.86 4.01 16.72 14 17.3 8.16 286 524 44.6 3.31 2.28 15.63 11.92 0.55 3.74 19.93 15 17.0 7.97 278 489 53.8 3.27 3.11 10.64 8.48 1.79 6.10 18.53 16 14.8 7.50 33.3 200 382 33.5 2.28 1.67 9.29 7.43 0.68 2.02 11.99 17 17.4 7.97 173 324 35.5 1.54 1.38 10.85 5.42 0.98 2.90 14.72 18 19.6 8.21 272 549 60.7 3.26 2.39 19.15 16.75 0.70 1.38 21.23 19 17.9 8.27 257 558 58.7 3.04 2.73 18.33 16.87 0.72 2.14 21.18 Maximum 20.6 8.45 33.3 296 558 62.2 3.40 3.20 19.15 16.87 1.97 6.10 21.23 Minimum 14.8 7.50 33.3 173 324 33.5 1.54 1.38 8.30 5.42 0.53 1.22 9.91 Average 17.8 8.13 33.3 247 461 51.4 2.80 2.51 13.18 10.98 0.97 2.75 16.54 #Tests 19 19 0 0 1 19 19 19 19 19 0 0 19 19 19 19 19 0 0 0 Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25"above From: 2001 Fredericksburg Ditch To: 2019 Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Ca Mg Na SAR Na Total E.coli Strep <-Colonies-> <-Filaments-> <-Filamaments-> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 01 7.95 18.72 03 6.44 16.96 03 6.82 18.70 04 8.27 16.85 05 6.96 13.11 06 7.53 13.26 07 6.94 15.22 08 7.31 15.28 09 7.70 15.80 10 6.35 15.55 11 7.58 12.47 12 6.32 15.17 13 6.53 15.50 14 7.17 12.29 15 7.85 18.10 16 9.23 9.59 17 7.78 8.92 18 7.51 13.90 19 7.19 14.5 Maximum 0 0 0 0 0 0 0 9.23 18.72 Minimum 0 0 0 0 0 0 0 6.32 8.92 Average 7.34 14.73 #Tests 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 19 19 0 Site : SW-12 Nitrate-Nitrogen Total Phosphorus 10.0 10.0 9.0 9.0 8.0 8.0 7.0 7.0 6.0 6.0 rn 5.0 - - rn 5.0 E E 4.0 4.0 3.0 3.0 2.0 -_ _ 2.0 1.0 1.0 0.0 0.0 01 03 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 01 03 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 t Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 100 - 500 90 80 400 70 60 300 - - J J m 50 as E E 40 200 30 - 20 100 10 0 0 01 03 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 01 03 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 —�—Chlorides Linear(Chlorides) +TDS Linear(TDS) Site: SW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredericksburg Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 100' below confluence with reclaimed water 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 5/8/2019 6.0 7.73 44 49 1.74 0.078 0.045 0.474 0.308 < 0.010 0.027 6/4/2019 9.0 7.99 47 71.2 3.07 0.157 0.126 0.958 0.917 0.036 0.086 7/9/2019 13.5 9.21 42 67.4 2.86 0.134 0.122 0.763 0.740 0.031 0.074 8/8/2019 16.4 8.08 74 116 5.32 0.310 0.284 1.27 1.18 0.099 0.241 9/4/2019 17.6 8.07 78 116 5.43 0.305 0.280 1.22 1.07 0.085 0.230 10/03/19 6.9 7.63 65 84 2.06 0.073 0.059 0.380 0.240 0.010 0.129 Maximum 17.6 9.21 78 116 5.43 0.310 . 0.284 1.27 1.18 0.099 0.241 Minimum 6.0 7.63 42 49 1.74 0.073 0.045 0.380 0.240 < 0.010 0.027 Average 11.6 8.12 58 84 3.41 0.176 0.153 0.844 0.743 0.045 0.131 #Tests 6 6 0 0 0 6 6 6 6 6 0 0 6 6 6 6 Site: SW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredericksburg Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 100' below confluence with reclaimed water 2019 Oil & Coliforms Fecal--Blue Green Algae--------Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filaments Filamam( Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN #cells # cells # um q cells mg/L mg/L mg/L 5/8/2019 0.501 11.64 1.49 6/4/2019 1.08 9.92 1.54 742019 0.868 8.41 1.50 8/8/2019 1.61 8.28 2.40 9/4/2019 1.54 8.40 2.43 10/03/19 0.519 8.51 2.24 Maximum 1.610 11.64 2.43 Minimum 0.501 8.28 1.49 Average 1.020 9.19 1.93 #Tests 6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 6 0 Site: SW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredericksburg Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 100'below confluence From: 2001 with reclaimed water To: 2019 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO,-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 01 16.3 7.72 106 179 16.3 0.63 0.61 3.79 4.40 0.16 0.40 4.35 02 13.2 7.72 101 153 14.4 0.73 0.53 1.99 1.97 0.20 0.74 2.93 03 12.7 7.80 97 155 13.8 0.60 0.53 3.21 2.73 0.16 0.48 3.85 04 12.6 7.65 108 178 17.1 0.89 0.77 3.68 3.56 0.18 0.77 4.63 05 11.8 7.61 85 115 10.1 0.48 0.47 1.88 1.53 0.14 0.36 2.38 06 12.5 7.72 106 171 15.6 0.79 0.72 5.08 4.39 0.14 0.50 5.72 07 13.5 7.71 98 152 11.6 0.57 0.51 2.91 2.33 0.11 0.20 3.21 O8 13.4 7.86 144 252 25.4 1.50 1.37 5.76 4.53 0.46 1.33 7.55 09 13.6 7.68 103 174 14.7 0.94 0.85 3.10 2.70 0.30 0.62 4.02 10 10.3 7.37 77 105 7.3 0.31 0.28 0.87 0.64 0.09 0.61 1.57 11 13.0 8.28 114 182 15.8 0.76 0.71 2.89 1.97 0.61 1.24 4.74 12 12.7 7.16 73 91 4.5 0.20 0.17 0.61 0.23 0.10 0.59 1.30 13 15.8 7.56 86 133 8.6 0.44 0.42 1.75 1.23 0.14 0.48 2.36 14 16.1 7.89 105 185 13.7 0.71 0.67 2.43 2.45 0.16 1.11 3.68 15 14.0 7.39 78 117 5.8 0.28 0.25 0.85 0.51 0.12 0.61 1.57 16 12.5 7.40 0.8 116 190 17.0 1.02 0.83 3.30 2.61 0.31 1.06 4.66 17 12.3 7.62 66 90 5.6 0.21 0.17 0.78 0.46 0.14 0.44 1.36 18 15.9 7.87 116 199 17.7 0.94 1.22 1.71 4.87 0.22 0.38 1.87 19 11.6 8.12 58 84 3.41 0.18 0.15 0.84 0.74 0.05 0.13 1.02 Maximum 16.3 8.28 0.8 144 252 25.4 1.50 1.37 5.76 4.87 0.61 1.33 7.55 Minimum 10.3 7.16 0.8 58 84 3.4 0.18 0.15 0.61 0.23 0.05 0.13 1.02 Average 13.4 7.69 0.8 97 153 12.6 0.64 0.59 2.50 2.31 0.20 0.63 3.30 #Tests 19 19 0 0 1 19 19 19 19 19 0 0 19 19 19 19 19 0 0 0 Site: SW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredericksburg Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 100'below confluence From: 2001 with reclaimed water To: 2019 Coliforms Fecal/ Fecal <- Blue Green Algae-- - ---> Single Hard- Ca Mg Na SAR Na Total E.coli Strep <-Colonies--> <-Filaments-> <-Filamaments-> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 01 8.56 6.10 02 8.50 5.69 03 7.93 5.42 04 7.81 5.66 05 8.36 4.03 06 8.07 5.40 07 8.10 4.44 08 8.20 8.04 09 8.62 5.09 10 7.45 3.31 11 8.88 5.37 12 8.33 2.68 13 6.94 4.03 14 7.87 5.26 15 8.93 3.64 16 9.27 5.72 17 9.01 2.04 18 8.47 4.50 19 9.19 1.93 Maximum 0 0 0 0 0 0 0 9.27 8.04 Minimum 0 0 0 0 0 0 0 6.94 1.93 Average 8.34 4.65 #Tests 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 19 19 0 Site: SW-13 Nitrate-Nitrogen Total Phosphorus 5.0 5.0 4.0 4.0 3.0 3.0 J J a E E 2.0 2.0 1.0 1.0 - 0.0 0.0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 t Nitrate Linear(Nitrate) +Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 50 500 40 400 30 300 J J Of 00 20 E 200 10 100 A A 0 0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 —4--Chlorides Linear(Chlorides) t TDS Linear(TDS) Site: SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT - Stream: Cello Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 05/08/19 8.9 7.90 119 185 15.0 0.596 0.487 3.90 3.75 0.090 0.371 06/04/19 Dry 07/09/19 15.6 7.92 341 591 67.1 1.64 1.66 1.86 1.02 0.050 4.11 08/08/19 18.6 7.46 288 511 56.1 3.07 2.87 6.9 7.18 0.777 5.86 09/04/19 19.5 7.58 324 621 62.8 3.82 3.26 10.2 8.39 0.443 6.71 10/03/19 7.1 7.77 320 583 62.8 2.66 2.56 12.2 10.1 0.176 7.84 Maximum 19.5 7.92 341 621 67.1 3.82 3.260 12.2 10.1 0.777 7.84 Minimum 7.1 7.46 - 119 185 15.0 0.596 0.487 1.86 1.02 0.050 0.371 Average 13.9 7.73 278 498 52.8 2.36 2.17 7.01 6.09 0.307 4.98 #Tests 5 5 0 0 0 5 5 5 5 5 0 0 5 5 5 5 Site: SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Cello Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion 2019 Oil & Coliforms Fecal <--------------------------Blue Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep <------Cc<-----Fila<---FilaiCells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 05/08/19 4.36 10.26 5.41 06/04/19 07/09/19 6.02 7.52 13.9 08/08/19 13.5 5.55 11.9 09/04/19 17.4 6.16 16.0 10/03/19 20.2 7.20 18.6 Maximum 20.2 10.26 18.6 Minimum 4.36 5.55 5.41 Average 12.3 7.34 13.2. #Tests 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 5 0 Site: SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Cello Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion From: 2001 To: 2019 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 01 15.7 7.73 245 398 44.0 1.40 1.35 4.43 2.96 0.29 1.39 6.11 02 14.1 7.69 220 325 36.9 1.27 1.13 2.98 1.94 0.18 1.87 5.03 03 13.5 7.45 255 395 44.6 1.35 1.24 2.72 2.14 0.24 2.96 5.92 04 13.2 7.49 228 373 46.2 1.80 1.76 5.15 4.77 0.27. 3.41 8.83 05 12.1 7.42 173 239 27.3 1.23 1.20 3.61 2.98 0.15 1.77 5.53 O6 13.8 7.47 207 311 33.7 1.54 1.49 4.98 4.02 0.29 3.12 8.39 07 13.7 7.65 268 413 46.7 2.08 1.95 6.47 4.77 0.25 2.31 9.02 08 13.7 7.60 221 348 39.9 1.83 1.70 3.44 2.59 0.32 3.42 6.15 09 12.8 7.50 173 250 21.1 0.95 0.64 1.39 0.05 0.04 1.00 2.43 10 10.5 7.71 116 160 15.2 0.54 0.49 0.48 0.02 0.07 1.10 1.64 11 14.4 7.88 189 204 33.0 1.09 0.89 1.94 0.67 0.28 2.33 4.55 12 13.4 7.23 189 314 27.3 1.27 1.09 5.80 4.15 0.17 1.04 7.01 13 17.8 7.48 313 494 52.8 1.89 1.66 3.01 3.59 0.36 3.09 5.34 14 17.2 7.56 291 520 54.0 2.76 2.20 6.01 5.47 0.71 4.09 10.81 15 17.3 7.47 296 478 46.2 2.22 2.04 4.84 3.40 0.91 4.40 10.11 16 17.7 7.23 1.2 267 433 43.7 1.83 1.63 4.25 3.00 0.70 2.44 7.38 17 19.7 7.73 229 402 40.6 1.26 1.13 2.22 1.83 0.44 2.71 5.41 18 17.6 7.92 264 432 49.0 2.22 1.54 9.94 10.59 0.46 2.29 12.69 19 13.9 7.73 278 498 52.8 2.36 2.17 7.01 6.09 0.31 4.98 12.30 Maximum 19.7 7.92 1.2 313 520 54.0 2.76 2.20 9.94 10.59 0.91 4.98 12.69 Minimum 10.5 7.23 1.2 116 160 15.2 0.54 0.49 0.48 0.02 0.04 1.00 1.64 Average 14.8 7.58 1.2 233 368 39.7 1.63 1.44 4.25 3.42 0.34 2.62 7.09 #Tests 19 19 0 0 1 19 19 19 19 19 0 0 19 19 19 19 19 0 0 0 Site: SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Cello Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion From: 2001 To: 2019 Colifcrms Fecal/ Fecal < Blue Green Algae > Single Hard- Ca Mg Na SAR Na Total E.coli Strep <-Colonies-> <-Filaments-> <-Filamaments-> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells m /L m /L m /L 01 7.99 14.47 02 8.34 10.85 03 5.36 14.46 04 6.54 11.95 05 7.03 8.55 06 6.24 10.43 07 6.32 12.81 08 6.76 11.13 09 7.80 6.66 10 7.14 6.31 11 7.17 8.81 12 8.30 7.58 13 8.04 17.43 14 6.04 15.86 15 5.93 15.34 16 8.30 14.03 17 6.82 9.96 18 6.72 12.39 19 7.34 13.2 Maximum 0 0 0 0 0 0 0 8.34 17.43 Minimum 0 0 0 0 0 0 0 5.36 6.31 Average 7.06 11.69 #Tests 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 19 19 0 Site : SW-15 Nitrate-Nitrogen Total Phosphorus 10.0 - 10.0 9.0 X 9.0 8.0 - - -- ---- 8.0 7.0 7.0 6.0 - -- 6.0 rn 5.0 or 5.0 E E 4.0 4.0 3.0 3.0 2.0 2.0 1.0 1.0 0.0 Im 0.0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 t Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 100 500 90 80 400 70 ---- -_ 60 - 300 o6 50 E E 40 200 30 - 20 100 10 0 0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 t Chlorides Linear(Chlorides) -t—TDS Linear(TDS) Site: SW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Drain Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA @ Fairview Lane 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 05/08/19 20.5 7.42 124 162 8.87 0.180 0.067 0.988 0.035 < 0.010 0.082 06/04/19 18.6 7.44 131 199 16.4 0.350 0.139 2.20 1.23 0.052 0.739 07/09/19 19.3 8.75 140 186 14.0 0.100 < 0.010 0.733 0.020 < 0.010 0.069 08/08/19 19.8 7.25 164 218 21.6 0.242 < 0.020 1.18 0.027 < 0.020 0.024 09/04/19 16.6 7.58 146 243 18.5 0.127 0.033 0.614 < 0.020 < 0.010 0.176 10/03/19 10.5 7.69 136 197 13.9 0.054 0.025 0.218 < 0.020 < 0.010 0.524 Maximum 20.5 8.75 164 243 21.6 0.350 0.139 2.200 1.230 0.052 0.739 Minimum 10.5 7.25 124 162 8.87 0.054 < 0.010 0.218 < 0.020 < 0.010 0.024 Average 17.6 7.69 140 201 15.5 0.176 0.049 0.989 0.225 0.019 0.269 #Tests 6 6 0 0 0 6 6 6 6 6 0 0 6 6 6 6 Site: SW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Drain Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA @ Fairview Lane 2019 Oil & Coliforms Fecal <-Blue Green Algae-> Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filaments Filamamei Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 05/08/19 1.07 8.50 3.24 06/04/19 2.99 8.10 4.15 07/09/19 0.802 8.06 3.84 08/08/19 1.20 7.24 6.82 09/04/19 0.790 8.52 6.11 10/03/19 0.742 8.77 5.80 Maximum 2.99 8.77 6.82 Minimum 0.742 7.24 3.24 Average 1.27 8.20 4.99 #Tests 6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 6 0 Site: SW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Drain Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA @ Fairview Lane From: 2001 To: 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO,-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Year C pH mg/L NTU mg/L m /L umhcs m /L m /L m /L m /L m /L m /L mg/L m /L m /L mg/L m /L m /L 01 02 14.5 7.53 177 263 21.5 0.060 0.020 _ 0.460 0.050 <0.010 0.070 0.550 03 15.6 7.67 159 233 19.5 0.104 0.026 0.577 0.070 0.016 0.101 0.736 04 15.1 7.50 154 226 18.9 0.190 0.019 0.879 0.074 0.017 0.103 1.00 05 14.8 7.30 158 206 21.7 0.089 0.027 1.127 0.044 0.016 0.169 1.31 O6 15.3 7.37 154 206 18.9 0.124 0.058 0.984 0.353 0.021 0.342 1.35 07 15.7 7.59 160 227 17.8 0.070 0.018 0.475 0.026 <0.010 0.084 0.569 08 15.6 7.70 165 244 20.3 0.075 0.029 0.735 0.064 0.033 0.160 0.928 09 17.1 7.64 193 301 23.5 0.597 0.333 2.358 1.439 0.134 1.18 3.67 10 14.8 7.43 192 282 25.7 0.146 0.032 0.790 0.035 <0.010 0.147 0.947 11 15.6 7.70 161 228 20.7 0.216 0.102 1.196 0.112 0.064 0.404 1.66 12 19.6 7.38 152 231 15.5 0.111 0.028 0.771 0.243 <0.010 0.145 0.925 13 18.0 7.31 181 253 19.9 0.096 0.030 0.742 0.074 0.031 0.152 0.911 14 19.0 7.60 196 266 20.7 0.060 0.024 0.543 0.037 0.012 0.132 0.671 15 17.3 7.31 184 277 21.5 0.068 0.019 0.375 0.022 <0.010 0.011 0.377 16 17.7 7.24 3.3 183 273 22.5 0.093 0.025 0.684 0.024 0.011 0.049 0.733 17 18.5 7.25 177 251 17.9 0.169 0.046 1.100 0.044 0.011 0.125 1.23 18 19.4 7.82 171 255 19.6 0.117 0.046 0.593 0.021 0.013 0.052 0.646 19 17.6 7.69 140 201 15.5 0.176 0.049 0.989 0.225 0.019 0.269 1.27 Maximum 19.6 7.82 3.3 196 301 25.7 0.597 0.333 2.358 1.439 0.134 1.18 3.67 Minimum 14.5 7.24 3.3 140 201 15.5 0.060 0.018 0.375 0.021 <0.010 0.011 0.377 Average 16.7 7.50 3.3 170 246 20.1 0.142 0.052 0.854 0.164 0.025 0.205 1.08 #Tests 18 18 0 0 1 18 18 18 18 18 0 0 18 18 18 18 18 0 0 Site: SW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Drain Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA @ Fairview Lane From: 2001 To: 2019 Oil& Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Grease Ca Mg Na SAR Na Total E.coli Strep <-Colonies-> <-Filaments-> <-Filamaments-> Cells D.O. SO4 ness Year mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 01 02 6.97 8.04 03 7.03 6.75 04 7.73 6.35 05 8.79 6.95 O6 8.90 6.05 07 8.27 6.36 08 7.61 7.85 09 7.80 7.66 10 6.34 7.05 11 8.26 5.21 12 8.88 6.58 13 8.60 7.77 14 8.46 7.41 15 7.12 5.66 16 9.10 7.14 17 7.75 3.80 18 9.77 6.62 19 8.20 4.99 Maximum 0 0 0 0 0 0 0 9.77 8.04 Minimum 0 0 0 0 0 0 0 6.34 3.80 Average 8.09 6.57 #Tests 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18 18 0 Site: SW-16 Nitrate-Nitrogen Total Phosphorus 5.0 1.0 0.9 4.0 0.8 0.7 3.0 0.6 — -- J J a rn 0.5 E E 2.0 0.4 0.3 1.0 0.2 - 0.1 0.0 0.0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 t Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 50 250 40 200 30 - -- - - 150 J_ J to tx E E 20 100 10 50 0 0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 +Chlorides Linear(Chlorides) +TDS Linear(MS) TRIHALOMETHANES (THM) MTBE (Methyl tent-Butyl Ether) MONITORING MTBE Results Lower Sample Reporting Sample Site Date ID# Parameter Result Units Limit Method WWTP Final Effluent 02/06/2019 AG65215 MTBE ND ug/L 2 EPA 8260E 05/30/2019 AG66787 MTBE ND ug/L 3.0 EPA 524.2 12/03/2019 AG69832 MTBE ND ug/L 2 EPA 8260E Harvey Place Reservoir 06/03/2019 AG66838 MTBE ND ug/L 0.2 EPA8260 HPR Effluent 05/08/2019 AG66349 MTBE ND ug/L 2 EPA 8260B ND =Not Detected at or above Lower Reporting Limit ug/L =micrograms per liter or parts per billion ti•;�' eurofins Eaton Analytical / \ � TESIWG WBORP TORS 750 Royal Oaks Drive,Suite 100 Monrovia,California 91016-3629 ��/8 1I1110V` AT-1807 Tel:(626)386-1100 Fax:(866)988-3757 1 800 566 LABS(1 800 566 5227) Laboratory Report for South Lake Tahoe Public Utilities District 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Attention: Daniel Arce Fax- 530-541-0614 Date of Issue 05/24/2019 EUROFINS EATV Utah ELCP CA00006 ANALYTICAL, LLC Report:804461 Project:SPECIAL UMVN: Monica Van Natta Group:8260+oygenates Project Manager Accredited in accordance with TNI 2016 and ISO/IEC 17025:2017. Laboratory certifies that the test results meet all TNI 2016 and ISO/IEC 17025:2017 requirements unless noted under the individual analysis. Following the cover page are State Certification List,ISO 17025 Accredited Method List,Acknowledgement of Samples Received,Comments,Hits Report, Data Report,QC Summary,QC Report and Regulatory Forms,as applicable. Test results relate only to the sample(s)tested. Test results apply to the sample(s)as received,unless otherwise noted in the comments report(ISO/IEC 17025:2017) This report shall not be reproduced except in full.without the written approval of the laboratory This report includes ISO 17025 and non-ISO 17025 accredited methods Page 1 of 37 pages e u rof ins i Eaton Analytical STATE CERTIFICATION LIST State Certification Number State Certification Number Alabama 41060 Montana Cert 0035 Arizona AZ0778 Nebraska Certified Arkansas Certified Nevada CA000062018 California 2813 New Hampshire " 2959 Colorado Certified New Jersey' CA 008 Connecticut PH-0107 New Mexico Certified Delaware CA 006 New York" 11320 Florida ' E871024 North Carolina 06701 Georgia 947 North Dakota R-009 Guam 18-005R Oregon * CA200003-005 Hawaii Certified Pennsylvania' 68-565 Idaho Certified Puerto Rico Certified lllwo's Rhode Island LA000326 Indiana C-CA-01 South Carolina 87016 Iowa-Asbestos 413 South Dakota Certified Kansas ' E-10268 Tennessee TN02839 Kentucky 90107 Texas* r104704230-18-15 Louisiana ' LA180000 Utah(Primary AB)* CA00006 Maine CA0006 Vermont VTO114 Maryland 224 Virginia* 460260 Commonwealth of MP0004 Washington C838 Northern Marianas Is. Massachusetts M-CA006 EPA Region 5 Certified Michigan 9906 Los Angeles County 10264 Sanitation Districts Mississippi Certified NELAP/TNI Recognized Accreditation Bodies Eurofins Eaton Analytical, LLC 750 Royal Oaks Drive, Suite 100 T 626-386-1100 Monrovia, CA 91016-3629 F 866-988-3757 www.EurofinsUS.com/Eaton Page 2 of 37 pages ISO 17025 Accredited Method List The tests listed below are accredited and meet the requirements of ISO 17025 as verified by the ANSI-ASQ National Accreditation Board/ANAB. Refer to Certificate and scope of accreditation(AT 1807)found at:http://www.eatonanalytical.com nviron- nvtron- nvtron- nviron- Component of wmer na a METHOD OR mental mental Food and METHOD OR mental mental SPECIFIC TESTS TECHNI UE USED (Drinking (Waste Bov/Bev/ SPECIFIC TESTS TECHNI UE USED (Drinking (Waste Cumpavemnr Q Q rwa a.a a.vBaev Water) Water) Bottled!Water Water) Water) Bmued%V-, 1,2,3-TCP(5 PPT&OS CA SRL 524M-TCP x x Hexavalent Chromium EPA 218.7 x x PPT) 1,4-Dioxane EPA 522 x x Hexavalent Chromium SM 3500-Cr B x 2,3,7,8-TCDD Modified EPA 1613B x x Hormones EPA 539 x x Acrylamide In House Method(2440) x x Hydroxide as OH Cale. SM 2330B x x Algal Toxins/Microc stin In House Method(3570) K•eldahl Nitrogen EPA 351.2 x Alkalinity SM 2320B x x x Le ionella Le iolert x x Ammonia EPA 350.1 x x Mercury EPA 245.1 x x x Ammonia SM 4500-NH3 H x x Metals EPA 200.7/200.8 x x x Anions and DBPs by IC EPA 300.0 x x x Microc stin LR ELISA(2360) x x Anions and DBPs by IC EPA 300.1 x x Microc stin,Total EPA 546 x x Asbestos EPA 100.2 x x NDMA EPA 521 x x In house method 2425 BOD/CBOD SM 5210B x x Nitrate/Nitrite Nitrogen EPA 353.2 x x x Bromate In House Method(2447) x x OCL.Pesticides/PCB EPA 505 x x Carbarnates EPA 531.2 x x Ortho Phosphate EPA 365.1 x x x Carbonate as CO3 SM 2330B x x x Ortho Phosphorous SM 4500P E x x Carbonyls EPA 556 x x Oxyhalides Disinfection EPA 317.0 x x By roducts COD EPA 410.4/SM 5220D x Perchlorate EPA 33I.0 x x Chloramines SM 4500-CL G x x x Perchlorate(low and high) EPA 314.0 x x Chlorinated Acids EPA 515.4 x x Perfluorinated Alkyl Acids EPA 537 x x Chlorinated Acids EPA 555 x x Perfluorinated Polutant In house Method(2434) x x Chlorine Dioxide SM 4500-CLO2 D x x pH EPA 150.1 x Palin Test Chlorines SM 4500-Cl G x x x pH SM 4500-H+B x x x Combined-Residual Phen lurea Pesticides/ In House Method,based on EPA Conductivity EPA 120.1 x Herbicides 532(2448) x x Conductivity SM 2510B x x x Pseudomonas IDEXX Pseudalert(2461) x x Cormsivity(Langelier Index) SM 2330B x x Radium-226 GA Institute of Tech x x Cyanide,Amenable SM 4500-CN G x x Radium-228 GA Institute of Tech x x Cyanide,Free SM 450OCN F x x x Radon-222 SM 750ORN x x Cyanide,Total EPA 335.4 x x x Residue,Filterable SM 2540C x x x Cyanogen Chloride In House Method(2470) x x Residue,Non-filterable SM 2540D x screen Di uat and Para uat EPA 549.2 x x Residue,Total SM 2540B x x DBP/HAA SM 6251B x x Residue,Volatile EPA 160.4 x Dissolved Oxygen SM 4500-0 G x x Semi-VOC EPA 525.2 x x DOC SM 5310C x x Silica SM 4500-Si D x x E.Coli (MTF/EC+MUG) x x Silica SM 4500-SiO2 C x x E.Coli CFR 141 21(f)(6)(i) x x Sulfide SM 4500-S-D x E.Coli SM 9223 x Sulfite SM 4500-SO3B x x x E.Coli(Enumeration) SM 9221B.11 SM 9221F x x Surfactants SM 5540C x x x E.Coli(Enumeration) SM 9223B x x Taste and Odor Anal es SM 6040E x x EDB/DCBP EPA 504.1 x Total Coliform(P/A) SM 9221 A,B x x EDB/DBCP and DBP EPA 551.1 x x Total Coliform SM 9221 A,B,C x x Enumeration EDTA and NTA In House Method(2454) x x Total Coliform/E.coli Colisure SM 9223 x x Endothall EPA 548.1 x x Total Coliform SM 9221B x Total Coliform with Endothall In-house Method(2445) x x Chlorine Present SM 9221B x Enterococci SM 9230B x x Total Coliform/E.coli(P/A SM 9223 x x and Enumeration Fecal Coliform SM 9221 E(MTF/EC) x TOC SM 5310C x x x Fecal Coliform SM 9221C,E(MTF/EC) x TOX SM 5320B x Fecal Coliform SM 9221E(MTF/EC) x x Total Phenols EPA 420.1 x (Enumeration) Fecal Coliform with SM 9221 E x Total Phenols EPA 420.4 x x x Chlorine Present Fecal Stre tococci SM 9230B x x Total Phosphorous SM 4500 P E x Fluoride SM 4500-F C x x x Triazine Pesticides& In House(3617) x x De radates Glyphosate EPA 547 x x Turbidity EPA 180.1 x x x GI hosate+AMPA In House Method(3618) x x Turbidity SM 2130B x x Gross Alpha/Beta EPA 900.0 x x x Uranium by ICP/MS EPA 200.8 x x Gross Alpha Coprecipitation SM 7110 C x x x UV 254 SM 5910B x Hardness SM 2340B x x x VOC EPA 524.2 x x Heterotrophic Bacteria In House Method(2439) x x VOC In House Method(2411) x x Heterotro hic Bacteria SM 9215 B x x Yeast and Mold SM 9610 x x Hexavalent Chromium I EPA 218.6 x x x 750 Royal Oaks Dr.,Ste 100,Monrovia,CA 91016Tel(626)386-1100 Fax(626)386-1101 http://www.EatonAnalytical.com& 9-1-0031ssued:09/20/2018 Page 3 of 37 pages CHAIN OF CUSTODY South Tahoe Public Utility District Lab Sent Eurofins Preservatives: Turn-Around-Time: 1275 Meadow Crest Drive 4 C Standard South Lake Tahoe, 62 ho A 96150 �* Sampler(s): B. Chernago VOC -HCI �� M. Lieberman UH� 6� v � A Collection Lab ID# Sample Site Date&Time 1, AG66349 DO-01 Diamond Ditch @ Beginning start of Diamond Ditch;at HPR 0510812019 09:52 Ww X outlet AG66366 BLANK TRIP Ttlp Blank 0510a12019 00:00 X Notes: Relinquished by: - Received by: Report MTBE to 0.2 ug/L Analyze Travel and Field Blanks only if VOCs detected in samples. Signature , U�� Signature Use Calif State WriteOn to report&upload results of Potable Water Wells. Print y e y n'f e Print Company South Tahoe Public UtilityDistrict Company F29? Please Return all STPUD ice chests St Blue Ice Date: D C' ����Time: /U Ca Date: ��(�I( � Time: Comments: Relinquished by: Received by: Signature Signature Print Print Company Company Date: Time: Date: Time: cc Page 1 of 1 CD to N a) of a I` M O to ti,; eurofins INTERNAL CHAIN OF CUSTODY RECORD Eaton Analytical � SAMPLE TEMP RECEIVED: EEA Folder Number: LIN4 Note:If samples are out of temperature range,let the ASMs know.ASMs will determine whether to proceed with analysis or not. SAMPLES REC'D DAY OF COLLECTION? Yes If No IR Gun ID= A (Observation= t - t °C) (Corr.Factor -( °C) (Final= v °C) TYPE OF ICE: Real Synthetic No Ice CONDITION OF ICE: Frozen Partially Frozen Thawed N/A METHOD OF SHIPMENT: Pick-Up / Walk-In / dEx UPS / DHL / Area Fast / Top Line / Other: Compliance Acceptance Criteria: 1) Chemistry: >0,s 6°C,not frozen(NELAP)(if received after 24 hrs of sample collection) 2) Microbiology,Distribution: < 10°C,not frozen(can be z10°C if received on ice the same day as sample collection,within 8 hours) 3) Microbiology, Surface Water: < 10°C(if received after 2 hours of sample collection) II out Of temperature range for both Chemistry and Mlcr0bl0l0gy s8mpleS and temperature does not confirm,then measure the lempeature of each 1•(observation._'C) Car Factor 'C Final=__'C) 2•(oosorvatlon•_'C Carr FrtcWr_'C)(Final quadrant and record each temperature of the quadrants 3•(obemvawn-_'C)(Corr.Fataor_'C)(Final= 'C) 4•(observation-__-_'C)(Con.Few, 'C)(FInN•__—'C) 4 Dioxin(1613 or 2,3,7,8 TCDD): must be between 0-4°C,not frozen(if received after 24 hrs of sample collection) 5) pH Check. Manufacturer: Lot Number: pH strip type: 0- 14 or Expiration Date Results: 6) Chlorine check. Manufacturer:Sansafe. Lot No.: Expiration Date: Results 7) VOA Headspace: No Samples with Headspace: I � Samples with Headspace(see below): l� Headspace Documentation(use additional VOC Internal COFC for additional bottles) Exempt from heads pace concerns: Methods 515.4,HAA(6251,552),505,SPME,CCH,532LCMS,556,536,Antitoxin,LCMS methods using 40 ml vials, International clients: None/<8 None/<6 >6mm Samp ID Battle# Nonerl ,6mm Samp to Bottle# NOS<6 >6mm Samp ID Bottle# >6mm Samp ID Bottle# Note Sample IDs which have dissimilar headspace(i.e. potential sampling errors): SIGNATURE PRINT NAME COMPANYRITLE DATE TIME RECEIVED 6Y � / Z Euroflns Eaton Analytical l / Page_of_ QA FO 00833(QA F041IMS504)(5/23/18)Ver 7 ti®;` eurofins Eaton Analytical Laboratory Comments Tel:(626)386-1100 Report: 804461 Fax:(866)988-3757 Project: SPECIAL 1 800 566 LABS(1 800 566 5227) Group:8260+oygenates South Lake Tahoe Public Utilities District . Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Folder Comments Analytical results for 8260 are submitted by Calscience Environmental Laboratories, Inc. Garden Grove,CA ELAP ID 2944 exp 9-30-2019 The Comments Report may be blank if there are no comments for this report. Page 6 of 37 pages ti®ti eurofins Eaton Analytical Laboratory Data Report: 804461 Tel:(626)386-1100 Project:SPECIAL Fax:(866)988-3757 Group: 8260+oygenates 1 800 566 LABS(1 800 566 5227) Samples Received on: 05/10/2019 1321 South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe,CA 96150 Prepared Analyzed Prep Batch Analyzed Batch Method Analyte Result Units MRL Dilution Diamond Ditch f7 Beginning(201905100148) Sampled on 05/08/2019 0952 Variable ID:AG66349 EPA 8260B-4848_8260 VOC W Super List 05/20/19 05/21/19 01:57 (EPA 82606) 1,1,1,2-Tetrachloroethane ND ug/L 2 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,1,1-Tdchloroethane ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,1,2,2-Tetrachloroethane ND ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,1,2-Tdchloro-1,2,2-trifluoroethane ND ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,1,2-Tdchloroethane ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,1-Dichloroethane ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,1-Dichloroethene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,1-Dichloropropene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,2,3-Tdchlorobenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,2,3-Tdchloropropane ND ug/L 5 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,2,4-Tdchlorobenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,2,4-Trimethylbenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,2-Dibromo-3-chloropropane ND ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,2-Dibromoethane ND ug/L 1 1 O5/20/19 05/21/19 01:57 (EPA 8260B) 1,2-Dichlorobenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,2-Dichloroethane ND ug/L 0.5 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,2-Dichloropropane ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,3,5-Trimethylbenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,3-butadiene ND ug/L 25 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,3-Dichlorobenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,3-Dichloropropane ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,4-Dichlorobenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,4-Dioxane ND ug/L 100 1 05/20/19 05/21/19 01:57 (EPA 82608) 2,2-Dichloropropane ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 2-Butanone ND ug/L 20 1 05/20/19 05/21/19 01:57 (EPA 8260B) 2-Chloroethyl vinyl ether ND ug/L 50 1 05/20/19 05/21/19 01:57 (EPA 8260B) 2-Chlorotoluene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 2-Hexanone ND ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) 4-chlorotoluene ND ug/L 1 1 Rounding on totals after summation. (c)-indicates calculated results.Analysis is a calculated result.Reported results are not rounded until the final step before reporting.Therefore methods that use a test result with further calculation may have slight differences in final result than the component analyses. Page 7 of 37 pages ti~ eurofins Eaton Analytical Laboratory Data Report: 804461 Tel:(626)386-1100 Project: SPECIAL Fax:(866)988-3757 Group:8260+oygenates 1 800 566 LABS(1 800 566 5227) Samples Received on: 05/10/2019 1321 South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Prepared Analyzed Prep Batch Analyzed Batch Method Analyte Result Units MRL Dilution 05/20/19 05/21/19 01:57 (EPA 8260B) 4-methyl-2-Pentanone ND ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) Acetone ND ug/L 20 1 05/20/19 05/21/19 01:57 (EPA 8260B) Acetonitrile ND ug/L 20 1 05/20/19 05/21/19 01:57 (EPA 8260B) Acrolein ND ug/L 50 1 05/20/19 05/21/19 01:57 (EPA 8260B) Acrylonitrile ND ug/L 20 1 05/20/19 05/21/19 01:57 (EPA 8260B) Benzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Bromobenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Bromochloromethane ND ug/L 2 1 05/20/19 05/21/19 01:57 (EPA 8260B) Bromodichloromethane ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Bromoform ND ug/L 5 1 05/20/19 05/21/19 01:57 (EPA 8260B) Bromomethane ND ug/L 50 1 05/20/19 05/21/19 01:57 (EPA 8260B) c-1,2-Dichloroethene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Carbon disulfide ND ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) Carbon Tetrachloride ND ug/L 0.5 1 05/20/19 05/21/19 01:57 (EPA 8260B) Chlorobenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Chloroethane ND ug/L 5 1 05/20/19 05/21/19 01:57 (EPA 8260B) Chloroform ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Chloromethane ND ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) cis-1,3-Dichloropropene ND ug/L 0.5 1 05/20/19 05/21/19 01:57 (EPA 8260B) Cyclohexane ND ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) Cyclohexanone ND ug/L 50 1 05/20/19 05/21/19 01:57 (EPA 8260B) Dibromochloromethane ND ug/L 2 1 05/20/19 05/21/19 01:57 (EPA 8260B) Dibromomethane ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Dichlorodifluoromethane ND ug/L 5 1 05/20/19 05/21/19 01:57 (EPA 8260B) Diethyl Ether ND ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) Diisopropyl Ether(DIPE) ND ug/L 2 1 05/20/19 05/21/19 01:57 (EPA 8260B) Ethanol ND ug/L 100 1 05/20/19 05/21/19 01:57 (EPA 8260B) Ethylbenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Hexachloro-1,3-Butadiene ND ug/L 20 1 05/20/19 05/21/19 01:57 (EPA 8260B) Hexane ND ug/L 5 1 05/20/19 05/21/19 01:57 (EPA 8260B) Iodomethane ND ug/L 50 1 05/20/19 05/21/19 01:57 (EPA 8260B) Isobutyl Alcohol ND ug/L 50 1 05/20/19 05/21/19 01:57 (EPA 8260B) Isopropanol ND ug/L 200 1 Rounding on totals aftersummation. (c)-indicates calculated results Analysis is a calculated result.Reported results are not rounded until the final step before reporting.Therefore methods that use a test result with further calculation may have slight differences in final result than the component analyses. Page 8 of 37 pages eurofins Eaton Analytical Laboratory Data Report: 804461 Tel:(626)386-1100 Project: SPECIAL Fax:(866)988-3757 Group:8260+oygenates 1 800 566 LABS(1 800 566 5227) Samples Received on: 05/10/2019 1321 South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Prepared Analyzed Prep Batch Analyzed Batch Method Analyte Result Units MRL Dilution 05/20/19 05/21/19 01:57 (EPA 8260B) Isopropylbenzene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) m,p-Xylene NO ug/L 2 1 05/20/19 05/21/19 01:57 (EPA 8260B) Methylene chloride NO ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) Methyl-t-Butyl Ether(MTBE) NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) naphthalene NO ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) n-Butylbenzene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) n-Propyl benzene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) o-Xylene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) p-Isopropyltoluene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) sec-Butyl benzene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Styrene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) t-1,2-Dichloroethene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) t-1,3-Dichloropropene NO ug/L 0.5 1 05/20/19 05/21/19 01:57 (EPA 8260B) t-1,4-Dichloro-2-Butene NO ug/L 20 1 05/20/19 05/21/19 01:57 (EPA 8260B) Tert-Butyl Alcohol(TBA) NO ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) tert-Butyl benzene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Tetrachloroethene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Tetrahydrofuran NO ug/L 20 1 05/20/19 05/21/19 01:57 (EPA 8260B) Thiophene NO ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) Toluene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Trichloroethene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Trichlorofluoromethane NO ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) Vinyl Acetate NO ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) Vinyl chloride NO ug/L 0.5 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,2-Dichloroethane-d4 120 % 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,4-Bromofluorobenzene 88.0 % 1 05/20/19 05/21/19 01:57 (EPA 8260B) Dibromofluoromethane 106 % 1 05/20/19 05/21/19 01:57 (EPA 8260B) Toluene-d8 93.0 % 1 Travel Blank(201905100149) Sampled on 05/08/2019 0000 Variable ID:AG66355 EPA 8260B-4848_8260 VOC W Super List 05/20/19 05/21/19 02:23 (EPA 8260B) 1,1,1,2-Tetrachloroethane NO ug/L 2 1 Rounding on totals after summation. (c)-indicates calculated results.Analysis is a calculated result.Reported results are not rounded until the final step before reporting.Therefore methods that use a test result wgh further calculation may have slight differences in final result than the component analyses. Page 9 of 37 pages ti®ti eurofins Eaton Analytical Laboratory Data Report: 804461 Tel:(626)386-1100 Project:SPECIAL Fax:(866)988-3757 Group:8260+oygenates 1 800 566 LABS(1 800 566 5227) Samples Received on: 05/10/2019 1321 South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Prepared Analyzed Prep Batch Analyzed Batch Method Analyte Result Units MRL Dilution 05/20/19 05/21/19 02:23 (EPA 8260B) 1,1,1-Trichloroethane ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,1,2,2-Tetrachloroethane ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,1,2-Tdchloro-1,2,2-trifluoroethane ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,1,2-Trichloroethane ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,1-Dichloroethane ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,1-Dichloroethene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,1-Dichloropropene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2,3-Trichlorobenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2,3-Tdchloropropane ND ug/L 5 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2,4-Trichlorobenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2,4-Thmethylbenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2-Dibromo-3-chloropropane ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2-Dibromoethane ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2-Dichlorobenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2-Dichloroethane ND ug/L 0.5 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2-Dichloropropane ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,3,5-Tdmethylbenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,3-butadiene ND ug/L 25 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,3-Dichlorobenzene ND ug/L 1 1 0.5/20/19 05/21/19 02:23 (EPA 8260B) 1,3-Dichloropropane ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,4-Dichlorobenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,4-Dioxane ND ug/L 100 1 05/20/19 05/21/19 02:23 (EPA 8260B) 2,2-Dichloropropane ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 2-Butanone ND ug/L 20 1 05/20/19 05/21/19 02:23 (EPA 8260B) 2-Chloroethyl vinyl ether ND ug/L 50 1 05/20/19 05/21/19 02:23 (EPA 8260B) 2-Chlorotoluene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 2-Hexanone ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) 4-chlorotoluene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 4-methyl-2-Pentanone ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) Acetone ND ug/L 20 1 05/20/19 05/21/19 02:23 (EPA 8260B) Acetonitrile ND ug/L 20 1 05/20/19 05/21/19 02:23 (EPA 8260B) Acrolein ND ug/L 50 1 05/20/19 05/21/19 02:23 (EPA 8260B) Acrylonitrile ND ug/L 20 1 Rounding on totals aftersummation. (c)-indicates calculated results.Analysis is a calculated result.Reported results are not rounded until the final step before reporting.Therefore methods that use a test result with further calculation may have slight differences in final result than the component analyses. Page 10 of 37 pages ti-% eurofins Eaton Analytical Laboratory Data Report: 804461 Tel:(626)386-1100 Project: SPECIAL Fax:(866)988-3757 Group:8260+oygenates 1 800 566 LABS(1 800 566 5227) Samples Received on: 05/10/2019 1321 South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Prepared Analyzed Prep Batch Analyzed Batch Method Analyte Result Units MRL Dilution 05/20/19 05/21/19 02:23 (EPA 8260B) Benzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Bromobenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Bromochloromethane ND ug/L 2 1 05/20/19 05/21/19 02:23 (EPA 8260B) Bromodichloromethane ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Bromoform ND ug/L 5 1 05/20/19 05/21/19 02:23 (EPA 8260B) Bromomethane ND ug/L 50 1 05/20/19 05/21/19 02:23 (EPA 8260B) c-1,2-Dichloroethene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Carbon disulfide ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) Carbon Tetrachloride ND ug/L 0.5 1 05/20/19 05/21/19 02:23 (EPA 8260B) Chlorobenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Chloroethane ND ug/L 5 1 05/20/19 05/21/19 02:23 (EPA 8260B) Chloroform ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Chloromethane ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) cis-1,3-Dichloropropene ND ug/L 0.5 1 05/20/19 05/21/19 02:23 (EPA 8260B) Cyclohexane ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) Cyclohexanone ND ug/L 50 1 05/20/19 05/21/19 02:23 (EPA 8260B) Dibromochloromethane ND ug/L 2 1 05/20/19 05/21/19 02:23 (EPA 8260B) Dibromomethane ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Dichlorodifluoromethane ND ug/L 5 1 05/20/19 05/21/19 02:23 (EPA 8260B) Diethyl Ether ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) Diisopropyl Ether(DIPE) ND ug/L 2 1 05/20/19 05/21/19 02:23 (EPA 8260B) Ethanol ND ug/L 100 1 05/20/19 05/21/19 02:23 (EPA 8260B) Ethylbenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Hexachloro-1,3-Butadiene ND ug/L 20 1 05/20/19 05/21/19 02:23 (EPA 8260B) Hexane ND ug/L 5 1 05/20/19 05/21/19 02:23 (EPA 8260B) lodomethane ND ug/L 50 1 05/20/19 05/21/19 02:23 (EPA 8260B) Isobutyl Alcohol ND ug/L 50 1 05/20/19 05/21/19 02:23 (EPA 8260B) Isopropanol ND ug/L 200 1 05/20/19 05/21/19 02:23 (EPA 8260B) Isopropyl benzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) m,p-Xylene ND ug/L 2 1 05/20/19 05/21/19 02:23 (EPA 8260B) Methylene chloride ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) Methyl-t-Butyl Ether(MTBE) ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) naphthalene ND ug/L 10 1 Rounding on totals after summation. (c)-indicates calculated results.Analysis is a calculated result.Reported results are not rounded until the final step before reporting.Therefore methods that use a test result with further calculation may have slight differences in final result than the component analyses. Page 11 of 37 pages tiati eurofins f Eaton Analytical Laboratory Data Report: 804461 Tel:(626)386-1100 Project:SPECIAL Fax:(866)988-3757 Group:8260+oygenates 1 800 566 LABS(1 800 566 5227) Samples Received on: 05/10/2019 1321 South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Prepared Analyzed Prep Batch Analyzed Batch Method Analyte Result Units MRL Dilution 05/20/19 05/21/19 02:23 (EPA 8260B) n-Butylbenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) n-Propyl benzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) o-Xylene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) p-Isopropyltoluene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 82606) sec-Butylbenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Styrene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) t-1,2-Dichloroethene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) t-1,3-Dichloropropene ND ug/L 0.5 1 05/20/19 05/21/19 02:23 (EPA 8260B) t-1,4-Dichloro-2-Butene ND ug/L 20 1 05/20/19 05/21/19 02:23 (EPA 8260B) Tert-Butyl Alcohol(TBA) ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) tert-Butylbenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Tetrachloroethene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Tetrahydrofuran ND ug/L 20 1 05/20/19 05/21/19 02:23 (EPA 8260B) Thiophene ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) Toluene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Trichloroethene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Trichlorofluoromethane ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) Vinyl Acetate ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) Vinyl chloride ND ug/L 0.5 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2-Dichloroethane-d4 120 % 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,4-Bromofluorobenzene 87.0 % 1 05/20/19 05/21/19 02:23 (EPA 8260B) Dibromofluoromethane 104 % 1 05/20/19 05/21/19 02:23 (EPA 8260B) Toluene-d8 96.0 % 1 Rounding on totals after summation. (c)-indicates calculated results.Analysis is a calculated result.Reported results are not rounded until the final step before reporting.Therefore methods that use a lest result with further calculation may have slight differences In final result than the component analyses. Page 12 of 37 pages tioti eurofins Eaton Analytical Laboratory QC Summary Report: 804461 Tel:(626)386-1100 Project: SPECIAL Fax:(866)988-3757 Group: 8260+oygenates 1 800 566 LABS(1 800 566 5227) South Lake Tahoe Public Utilities District Analytical Batch: Analysis Date: Analyzed by: Page 13 of 37 pages ti®~ eurofins Eaton Analytical Laboratory QC Report: 804461 Tel:(626)386-1100 Project:SPECIAL Fax:(866)988-3757 1 800 566 LABS(1 800 566 5227) Group:8260+oygenates South Lake Tahoe Public Utilities District QC Type Analyte Native Spiked Recovered Units Yield(%) Limits(%) RPDLimit(%) RPD% by Analytical Batch: Analysis Date: Spike recovery is already corrected for native results. Spikes which exceed Limits and Method Blanks with positive results are highlighted by Underlining. criteria for MS and Dup are advisory only,batch control is based on LCS.Criteria for duplicates are advisory only,unless otherwise specified in the method. RPD not calculated for LCS2 when different a concentration than LCS'I is used. RPD not calculated for Duplicates when the result is not five times the MRL(Minimum Reporting Level). (S)-Indicates surrogate compound. (1)-Indicates internal standard compound. Page 14 of 37 pages ORGANIC CHEMICAL ANALYSIS (11/07) Date of Report: 5/24/2019 Sample ID No.: - Laboratory Name: Name of Sampler: Employed by: Date/Time Sample Date/Time Date Analyses Collected: Received @Lab: Completed. System Name: XXXXXXXXXXX System Number:XXXXXXX Variable ID: COC ID: Name or Number of Sample Source: User ID: Station number:XXXXXXX-XXX Date/Time of Sample: Laboratory Code: 191519101 YY MM DD TTTT Date Analyses completed: YY MM DD Submitted by: Eurofins Eaton Analytical, LLC Phone#(626)386-1100 TEST CHEMICAL ENTRY ANALYSES MCL DLR METHOD ALL CHEMICALS EXCEPT 2,3,7,8 TCDD(DIOXIN) # RESULTS ug/L ug/L reported uG/L (I) I-Invalid MRL exceeds DLR Page 1 of 1 Page 15 of 37 pages Page 1 of 22 0% eurofins ti Calscience WORK ORDER NUMBER: 19-05-0925 The difference is service AIR ( SO!! I �,/ATER I MARINE CHEMISTRY Analytical Report For Client: Eurofins Eaton Analytical, Inc Client Project Name: 804461 Attention: Jaclyn Contreras 750 Royal Oaks Drive Suite 100 Monrovia, CA 91016-3629 �m 4 /A Approved for release on 05/21/2019 by: Cecile deGuia ResultLink ► Project Manager Email your PM ► Eurofins Calscience(Calscience)certifies that the test results provided in this report meet all NELAC Institute requirements for parameters for which accreditation is required or available.Any exceptions to NELAC Institute requirements are noted in the case narrative.The original report of subcontracted analyses,if any,is attached to this report.The results in this report are limited to the sample(s)tested and any reproduction thereof must be made in its entirety.The client or recipient of this report is specifically prohibited from making material changes to said report and,to the extent that such changes are made,Calscience is not responsible, legally or otherwise.The client or recipient agrees to indemnify Calscience for any defense to any litigation which may arise. F Lincoln • 1 Page 16 of 37 pages Page 2 of 22 ti•: eurof ins Calscience Contents Client Project Name: 804461 Work Order Number: 19-05-0925 1 Work Order Narrative. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Sample Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Client Sample Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.1 EPA 8260B Volatile Organics (Aqueous). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Quality Control Sample Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.1 LCS/LCSD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5 Sample Analysis Summary. . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . 17 6 Glossary of Terms and Qualifiers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 7 Chain-of-Custody/Sample Receipt Form. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 • FAX:(714)894-7501 Page 17 of 37 pages Page 3 of 22 ti•; e u rof i ns I Work Order Narrative Calscience Work Order: 19-05-0925 Page 1 of 1 Condition Upon Receipt: Samples were received under Chain-of-Custody(COC)on 05/13/19.They were assigned to Work Order 19-05-0925. Unless otherwise noted on the Sample Receiving forms all samples were received in good condition and within the recommended EPA temperature criteria for the methods noted on the COC.The COC and Sample Receiving Documents are integral elements of the analytical report and are presented at the back of the report. Holding Times: All samples were analyzed within prescribed holding times(HT)and/or in accordance with the Calscience Sample Acceptance Policy unless otherwise noted in the analytical report and/or comprehensive case narrative, if required. Any parameter identified in 40CFR Part 136.3 Table II that is designated as"analyze immediately"with a holding time of<= 15 minutes(40CFR-136.3 Table II,footnote 4), is considered a"field"test and the reported results will be qualified as being received outside of the stated holding time unless received at the laboratory within 15 minutes of the collection time. Quality Control: All quality control parameters (QC)were within established control limits except where noted in the QC summary forms or described further within this report. i V Subcontractor Information: o Unless otherwise noted below(or on the subcontract form), no samples were subcontracted. Additional Comments: Air-Sorbent-extracted air methods(EPA TO-4A, EPA TO-10, EPA TO-13A, EPA TO-17):Analytical results are converted from mass/sample basis to mass/volume basis using client-supplied air volumes. Solid- Unless otherwise indicated, solid sample data is reported on a wet weight basis, not corrected for% moisture.All QC results are always reported on a wet weight basis. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 • FAX:(714)894-7501 Page 18 of 37 pages Page 4 of 22 40. eurofins I Sample Summary Calscience Client: Eurofins Eaton Analytical, Inc Work Order: 19-05-0925 750 Royal Oaks Drive, Suite 100 Project Name: 804461 Monrovia, CA 91016-3629 PO Number: 99-66431 Date/Time 05/13/19 10:56 Received: Number of 4 Containers: Attn: Jaclyn Contreras Sample Identification Lab Number Collection Date and Time Number of Matrix Containers 201905100148 19-05-0925-1 05/08/19 09:52 3 Aqueous 201905100149 19-05-0925-2 05/08/19 00:00 1 Aqueous t d `o U 0 K 7440 Lincoln Way,Garden Grove,CA 92841-1427 TEL:(714)895-5494 FAX:(714)894-7501 Page 19 of 37 pages Page 5 of 22 e u rof i n s I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 804461 Page 1 of 9 Client Sample Number Lab Sample Date/Time Matrix Instrument Date Date/Time QC Batch ID Number Collected Prepared Analyzed 20,1905100148 19;05 0925-1-A 05l08119,;, Aqueous ',GC/M§Z 05l20/19; 05l21119 - 190520•L04T 09:52 0157.' Comment(s): Results were evaluated to the MDL(DL),concentrations>=to the MDL(DL)but<RL(LOQ),if found,are qualified with a"J"flag. Parameter Result RL MDL DF Qualifiers Isobutyl Alcohol ND 50 20 1.00 Cyclohexanone ND 50 6.1 1.00 2-Methyl-2-Butanol(TAA) ND 50 15 1.00 Acetone ND 20 10 1.00 Benzene ND 1.0 0.14 1.00 Bromobenzene ND 1.0 0.19 1.00 Bromochloromethane ND 2.0 0.46 1.00 Bromodichloromethane ND 1.0 0.23 1.00 Bromoform ND 5.0 1.8 1.00 Bromomethane ND 50 19 1.00 0 2-Butanone ND 20 6.6 1.00 n-Butylbenzene ND 1.0 0.30 1.00 v sec-Butylbenzene ND 1.0 0.19 1.00 tert-Butylbenzene ND 1.0 0.25 1.00 Diethyl Ether ND 10 0.31 1.00 Carbon Disulfide ND 10 0.70 1.00 Carbon Tetrachloride ND 0.50 0.23 1.00 Chlorobenzene ND 1.0 0.16 1.00 Chloroethane ND 5.0 0.76 1.00 2-Chloroethyl Vinyl Ether ND 50 9.0 1.00 Chloroform ND 1.0 0.18 1.00 Chloromethane ND 10 0.50 1.00 2-Chlorotoluene ND 1.0 0.16 1.00 4-Chlorotoluene ND 1.0 0.18 1.00 Dibromochloromethane ND 2.0 0.46 1.00 1,2-Dibromo-3-Chloropropane ND 10 2.1 1.00 1,2-Dibromoethane ND 1.0 0.27 1.00 Dibromomethane ND 1.0 0.30 1.00 1,2-Dichlorobenzene ND 1.0 0.14 1.00 1,3-Dichlorobenzene ND 1.0 0.19 1.00 1,4-Dichlorobenzene ND 1.0 0.24 1.00 Dichlorodifluoromethane ND 5.0 0.28 1.00 1,1-Dichloroethane ND 1.0 0.28 1.00 1,2-Dichloroethane ND 0.50 0.19 1.00 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit: . 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 20 of 37 pages Page 6 of 22 tioti eurofins I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 804461 Page 2 of 9 Parameter Result RL MDL DF Qualifiers 1,1-Dichloroethene ND 1.0 0.22 1.00 c-1,2-Dichloroethene ND 1.0 0.27 1.00 t-1,2-Dichloroethene ND 1.0 0.40 1.00 Acetonitrile ND 50 1.5 1.00 1,2-Dichloropropane ND 1.0 0.20 1.00 Acrolein ND 50 2.4 1.00 Acrylonitrile ND 20 3.1 1.00 1,3-Dichloropropane ND 1.0 0.14 1.00 2,2-Dichloropropane ND 1.0 0.44 1.00 1,1-Dichloropropene ND 1.0 0.17 1.00 c-1,3-Dichloropropene ND 0.50 0.20 1.00 t-1,3-Dichloropropene ND 0.50 0.23 1.00 Ethylbenzene ND 1.0 0.14 1.00 2-Hexanone ND 10 5.3 1.00 Isopropyl benzene ND 1.0 0.16 1.00 U. p-Isopropyltoluene ND 1.0 0.22 1.00 Methylene Chloride ND 10 4.0 1.00 C� 4-Methyl-2-Pentanone ND 10 0.46 1.00 Naphthalene ND 10 5.1 1.00 n-Propylbenzene ND 1.0 0.18 1.00 Styrene ND 1.0 0.15 1.00 1,1,1,2-Tetrachloroethane ND 2.0 0.43 1.00 1,1,2,2-Tetrachloroethane ND 10 0.17 1.00 Tetrachloroethene ND 1.0 0.24 1.00 Toluene ND 1.0 0.13 1.00 1,2,3-Trichlorobenzene ND 1.0 0.28 1.00 1,2,4-Trichlorobenzene ND 1.0 0.34 1.00 1,1,1-Trichloroethane ND 1.0 0.31 1.00 Hexachloro-1,3-Butadiene ND 20 0.42 1.00 1,1,2-Trichloro-1,2,2-Trifluoroethane ND 10 0.62 1.00 1,1,2-Trichloroethane ND 1.0 0.22 1.00 lodomethane ND 50 19 1.00 Trichloroethene ND 1.0 0.24 1.00 Trichlorofluoromethane ND 10 0.28 1.00 1,2,3-Trichloropropane ND 5.0 0.22 1.00 1,2,4-Trimethylbenzene ND 1.0 0.21 1.00 1,3,5-Trimethylbenzene ND 1.0 0.17 1.00 Vinyl Acetate ND 10 2.9 1.00 Vinyl Chloride ND 0.50 0.16 1.00 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 21 of 37 pages Page 7 of 22 4' eurofins I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 804461 Page 3 of 9 Parameter Result RL MDL DF Qualifiers p/m-Xylene ND 2.0 0.31 1.00 o-Xylene ND 1.0 0.15 1.00 Methyl-t-Butyl Ether(MTBE) ND 1.0 0.16 1.00 t-1,4-Dichloro-2-Butene ND 20 2.6 1.00 Tetrahydrofuran ND 20 3.3 1.00 Tert-Butyl Alcohol(TBA) ND 10 3.1 1.00 Diisopropyl Ether(DIPE) ND 2.0 0.16 1.00 Ethyl-t-Butyl Ether(ETBE) ND 2.0 0.12 1.00 Tert-Amyl-Methyl Ether(TAME) ND 2.0 0.13 1.00 Ethanol ND 100 53 1.00 Cyclohexane ND 10 3.3 1.00 Thiophene ND 10 0.16 1.00 1,4-Dioxane ND 100 26 1.00 Hexane ND 5.0 0.95 1.00 - 1,3-Butadiene ND 25 0.95 1.00 O Isopropanol ND 200 100 1.00 2,2,4-Trimethyl Pentane ND 10 0.82 1.00 Surrooate Rec. % Control Limits Qualifiers 1,4-Bromofluorobenzene 88 77-120 Dibromofluoromethane 106 80-128 1,2-Dichloroethane-d4 120 80-129 Toluene-d8 93 80-120 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 • FAX:(714)894-7501 Page 22 of 37 pages Page 8 of 22 % eurofins I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 804461 Page 4 of 9 Client Sample Number Lab Sample Date/Time Matrix Instrument Date Date/Time QC Batch ID Number Collected Prepared Analyzed 201905100149 19=05,0925,2-°A 05/08/19*,a Aqueous.„ GCIMS Z - 05120/19,- .'r `05121/19 - :190520L041 Z00:00 02 23' Comment(s): -Results were evaluated to the MDL(DL),concentrations>=to the MDL(DL)but<.RL(LOQ),if found,are qualified with a"J"flag. Parameter Result RL MDL DF Qualifiers Isobutyl Alcohol ND 50 20 1.00 Cyclohexanone ND 50 6.1 1.00 2-Methyl-2-Butanol(TAA) ND 50 15 1.00 Acetone ND 20 10 1.00 Benzene ND 1.0 0.14 1.00 Bromobenzene ND 1.0 0.19 1.00 Bromochloromethane ND 2.0 0.46 1.00 Bromodichloromethane ND 1.0 0.23 1.00 Bromoform ND 5.0 1.8 1.00 Bromomethane ND 50 19 1.00 0 2-Butanone ND 20 6.6 1.00 0 n-Butylbenzene ND 1.0 0.30 1.00 sec-Butylbenzene ND 1.0 0.19 1.00 tert-Butylbenzene ND 1.0 0.25 1.00 Diethyl Ether ND 10 0.31 1.00 Carbon Disulfide ND 10 0.70 1.00 Carbon Tetrachloride ND 0.50 0.23 1.00 Chlorobenzene ND 1.0 0.16 1.00 Chloroethane ND 5.0 0.76 1.00 2-Chloroethyl Vinyl Ether ND 50 9.0 1.00 Chloroform ND 1.0 0.18 1.00 Chloromethane ND 10 0.50 1.00 2-Chlorotoluene ND 1.0 0.16 1.00 4-Chlorotoluene ND 1.0 0.18 1.00 Dibromochloromethane ND 2.0 0.46 1.00 1,2-Dibromo-3-Chloropropane ND 10 2.1 1.00 1,2-Dibromoethane ND 1.0 0.27 1.00 Dibromomethane ND 1.0 0.30 1.00 1,2-Dichlorobenzene ND 1.0 0.14 1.00 1,3-Dichlorobenzene ND 1.0 0.19 1.00 1,4-Dichlorobenzene ND 1.0 0.24 1.00 Dichlorodifluoromethane ND 5.0 0.28 1.00 1,1-Dichloroethane ND 1.0 0.28 1.00 1,2-Dichloroethane ND 0.50 0.19 1.00 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 23 of 37 pages Page 9 of 22 e u rof ins I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260E Units: ug/L Project: 804461 Page 5 of 9 Parameter Result RL MDL DF Qualifiers 1,1-Dichloroethene ND 1.0 0.22 1.00 c-1,2-Dichloroethene ND 1.0 0.27 1.00 t-1,2-Dichloroethene ND 1.0 0.40 1.00 Acetonitrile ND 50 1.5 1.00 1,2-Dichloropropane ND 1.0 0.20 1.00 Acrolein ND 50 2.4 1.00 Acrylonitrile ND 20 3.1 1.00 1,3-Dichloropropane ND 1.0 0.14 1.00 2,2-Dichloropropane ND 1.0 0.44 1.00 1,1-Dichloropropene ND 1.0 0.17 1.00 c-1,3-Dichloropropene ND 0.50 0.20 1.00 t-1,3-Dichloropropene ND 0.50 0.23 1.00 Ethylbenzene ND 1.0 0.14 1.00 2-Hexanone ND 10 5.3 1.00 Isopropyl benzene ND 1.0 0.16 1.00 0 p-Isopropyltoluene ND 1.0 0.22 1.00 Methylene Chloride ND 10 4.0 1.00 4-Methyl-2-Pentanone ND 10 0.46 1.00 Naphthalene ND 10 5.1 1.00 n-Propylbenzene ND 1.0 0.18 1.00 Styrene ND 1.0 0.15 1.00 1,1,1,2-Tetrachloroethane ND 2.0 0.43 1.00 1,1,2,2-Tetrachloroethane ND 10 0.17 1.00 Tetrachloroethene ND 1.0 0.24 1.00 Toluene ND 1.0 0.13 1.00 1,2,3-Trichlorobenzene ND 1.0 0.28 1.00 1,2,4-Trichlorobenzene ND 1.0 0.34 1.00 1,1,1-Trichloroethane ND 1.0 0.31 1.00 Hexachloro-1,3-Butadiene ND 20 0.42 1.00 1,1,2-Trichloro-1,2,2-Tricuoroethane ND 10 0.62 1.00 1,1,2-Trichloroethane ND 1.0 0.22 1.00 lodomethane ND 50 19 1.00 Trichloroethene ND 1.0 0.24 1.00 Trichlorofluoromethane ND 10 0.28 1.00 1,2,3-Trichloropropane ND 5.0 0.22 1.00 1,2,4-Trimethylbenzene ND 1.0 0.21 1.00 1,3,5-Trimethylbenzene ND 1.0 0.17 1.00 Vinyl Acetate ND 10 2.9 1.00 Vinyl Chloride ND 0.50 0.16 1.00 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 24 of 37 pages Page 10 of 22 ti} eurofins I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 804461 Page 6 of 9 Parameter Result RL MDL DF Qualifiers p/m-Xylene ND 2.0 0.31 1.00 o-Xylene ND 1.0 0.15 1.00 Methyl-t-Butyl Ether(MTBE) ND 1.0 0.16 1.00 t-1,4-Dichloro-2-Butene ND 20 2.6 1.00 Tetrahydrofuran ND 20 3.3 1.00 Tert-Butyl Alcohol(TBA) ND 10 3.1 1.00 Diisopropyl Ether(DIPE) ND 2.0 0.16 1.00 Ethyl-t-Butyl Ether(ETBE) ND 2.0 0.12 1.00 Tert-Amyl-Methyl Ether(TAME) ND 2.0 0.13 1.00 Ethanol ND 100 53 1.00 Cyclohexane ND 10 3.3 1.00 Thiophene ND 10 0.16 1.00 1,4-Dioxane ND 100 26 1.00 Hexane ND 5.0 0.95 1.00 s 1,3-Butadiene ND 25 0.95 1.00 U O Isopropanol ND 200 100 1.00 2,2,4-Trimethyl Pentane ND 10 0.82 1.00 Surrogate Rec. % Control Limits Qualifiers 1,4-Bromofluorobenzene 87 77-120 Dibromofluoromethane 104 80-128 1,2-Dichloroethane-d4 120 80-129 Toluene-d8 96 80-120 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 • FAX:(714)894-7501 Page 25 of 37 pages Page 11 of 22 ti•; eurofins Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 804461 Page 7 of 9 Client Sample Number Lab Sample DatefTime Matrix Instrument Date Date/Time QC Batch ID Number Collected Prepared Analyzed Method Blank 099-14 001-28827, N/A Aqueous GCIMS Z - 05/20119 - 05120%19 _'; 190620L041 Comment(s): Results were evaluated to the MDL(DL),concentrations>=to the MDL(DL)but<RL(LOQ),if found,are qualified with a"J"flag. Parameter Result RL MDL DF Qualifiers Isobutyl Alcohol ND 50 20 1.00 Cyclohexanone ND 50 6.1 1.00 2-Methyl-2-Butanol(TAA) ND 50 15 1.00 Acetone ND 20 10 1.00 Benzene ND 1.0 0.14 1.00 Bromobenzene ND 1.0 0.19 1.00 Bromochloromethane ND 2.0 0.46 1.00 Bromodichloromethane ND 1.0 0.23 1.00 Bromoform ND 5.0 1.8 1.00 Bromomethane ND 50 19 1.00 0 2-Butanone ND 20 6.6 1.00 0 n-Butylbenzene ND 1.0 0.30 1.00 sec-Butylbenzene ND 1.0 0.19 1.00 tert-Butyl benzene ND 1.0 0.25 1.00 Diethyl Ether ND 10 0.31 1.00 Carbon Disulfide ND 10 0.70 1.00 Carbon Tetrachloride ND 0.50 0.23 1.00 Chlorobenzene ND 1.0 0.16 1.00 Chloroethane ND 5.0 0.76 1.00 2-Chloroethyl Vinyl Ether ND 50 9.0 1.00 Chloroform ND 1.0 0.18 1.00 Chloromethane ND 10 0.50 1.00 2-Chlorotoluene ND 1.0 0.16 1.00 4-Chlorotoluene ND 1.0 0.18 1.00 Dibromochloromethane ND 2.0 0.46 1.00 1,2-Dibromo-3-Chloropropane ND 10 2.1 1.00 1,2-Dibromoethane ND 1.0 0.27 1.00 Dibromomethane ND 1.0 0.30 1.00 1,2-Dichlorobenzene ND 1.0 0.14 1.00 1,3-Dichlorobenzene ND 1.0 0.19 1.00 1,4-Dichlorobenzene ND 1.0 0.24 1.00 Dichlorodifluoromethane ND 5.0 0.28 1.00 1,1-Dichloroethane ND 1.0 0.28 1.00 1,2-Dichloroethane ND 0.50 0.19 1.00 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 26 of 37 pages Page 12 of 22 tip; eurofins I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 804461 Page 8 of 9 Parameter Result RL MDL DF Qualifiers 1,1-Dichloroethene ND 1.0 0.22 1.00 c-1,2-Dichloroethene ND 1.0 0.27 1.00 t-1,2-Dichloroethene ND 1.0 0.40 1.00 Acetonitrile ND 50 1.5 1.00 1,2-Dichloropropane ND 1.0 0.20 1.00 Acrolein ND 50 2.4 1.00 Acrylonitrile ND 20 3.1 1.00 1,3-Dichloropropane ND 1.0 0.14 1.00 2,2-Dichloropropane ND 1.0 0.44 1.00 1,1-Dichloropropene ND 1.0 0.17 1.00 c-1,3-Dichloropropene ND 0.50 0.20 1.00 t-1,3-Dichloropropene ND 0.50 0.23 1.00 Ethylbenzene ND 1.0 0.14 1.00 2-Hexanone ND 10 5.3 1.00 Isopropylbenzene ND 1.0 0.16 1.00 p-Isopropyltoluene ND 1.0 0.22 1.00 - Methylene Chloride ND 10 4.0 1.00 4-Methyl-2-Pentanone ND 10 0.46 1.00 Naphthalene ND 10 5.1 1.00 n-Propylbenzene ND 1.0 0.18 1.00 Styrene ND 1.0 0.15 1.00 1,1,1,2-Tetrachloroethane ND 2.0 0.43 1.00 1,1,2,2-Tetrachloroethane ND 10 0.17 1.00 Tetrachloroethene ND 1.0 0.24 1.00 Toluene ND 1.0 0.13 1.00 1,2,3-Trichlorobenzene ND 1.0 0.28 1.00 1,2,4-Trichlorobenzene ND 1.0 0.34 1.00 1,1,1-Trichloroethane ND 1.0 0.31 1.00 Hexachloro-1,3-Butadiene ND 20 0.42 1.00 1,1,2-Trichloro-1,2,2-Trifluoroethane ND 10 0.62 1.00 1,1,2-Trichloroethane ND 1.0 0.22 1.00 lodomethane ND 50 19 1.00 Trichloroethene ND 1.0 0.24 1.00 Trichlorofluoromethane ND 10 0.28 1.00 1,2,3-Trichloropropane ND 5.0 0.22 1.00 1,2,4-Trimethylbenzene ND 1.0 0.21 1.00 1,3,5-Trimethylbenzene ND 1.0 0.17 1.00 Vinyl Acetate ND 10 2.9 1.00 Vinyl Chloride ND 0.50 0.16 1.00 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 27 of 37 pages Page 13 of 22 j e u rof i ns I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 804461 Page 9 of 9 Parameter Result RL MDL DF Qualifiers p/m-Xylene ND 2.0 0.31 1.00 o-Xylene ND 1.0 0.15 1.00 Methyl-t-Butyl Ether(MTBE) ND 1.0 0.16 1.00 t-1,4-Dichloro-2-Butene ND 20 2.6 1.00 Tetrahydrofuran ND 20 3.3 1.00 Tert-Butyl Alcohol(TBA) ND 10 3.1 1.00 Diisopropyl Ether(DIPE) ND 2.0 0.16 1.00 Ethyl-t-Butyl Ether(ETBE) ND 2.0 0.12 1.00 Tert-Amyl-Methyl Ether(TAME) ND 2.0 0.13 1.00 Ethanol ND 100 53 1.00 Cyclohexane ND 10 3.3 1.00 Thiophene ND 10 0.16 1.00 1,4-Dioxane ND 100 26 1.00 Hexane ND 5.0 0.95 1.00 y 1,3-Butadiene ND 25 0.95 1.00 0 Isopropanol ND 200 100 1.00 2,2,4-Trimethyl Pentane ND 10 0.82 1.00 Surrooate Rec. °° Control Limits Qualifiers 1,4-Bromofluorobenzene 85 77-120 Dibromofluoromethane 99 80-128 1,2-Dichloroethane-d4 102 80-129 Toluene-d8 92 80-120 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 • FAX:(714)894-7501 Page 28 of 37 pages Page 14 of 22 ti• eurofins I Quality Control - LCS/LCSD Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Project: 804461 Page 1 of 3 Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed LCS/LCSD Batch Number 099-14-001-28827 LCS Aqueous GUMS Z : , .' 05120/19 -05/20119-22.03;190520L041:_ " 099-14-001 1.-28827 LCSD Aqueous' t . GCIMS Z 05%20119 05120119 22 29 190920L041 Parameter Soike LCS Conc. LCS LCSD LCSD %Rec.CL ME CL RPD RPD CL Qualifiers Added °oRec. Conc. Cyclohexanone 250.0 272.4 109 282.0 113 50-150 33-167 3 0-30 2-Methyl-2-Butanol(TAA) 250.0 251.3 101 251.1 100 50-150 33-167 0 0-21 Acetone 50.00 56.45 113 55.79 112 53-137 39-151 1 0-21 Benzene 50.00 50.93 102 50.12 100 79-121 72-128 2 0-20 Bromobenzene 50.00 47.24 94 47.14 94 80-120 73-127 0 0-20 Bromochloromethane 50.00 56.64 113 54.52 109 80-122 73-129 4 0-20 Bromodichloromethane 50.00 45.10 90 44.29 89 80-124 73-131 2 0-20 Bromoform 50.00 51.51 103 53.27 107 73-127 64-136 3 0-20 Bromomethane 50.00 28.37 57 26.36 53 50-150 33-167 7 0-26 2-Butanone 50.00 57.01 114 56.21 112 60-126 49-137 1 0-20 n-Butylbenzene 50.00 55.93 112 57.50 115 72-138 61-149 3 0-20 d sec-Butylbenzene 50.00 56.49 113 58.21 116 77-131 68-140 3 0-20 tert-Butylbenzene 50.00 54.35 109 55.89 112 80-125 72-132 3 0-20 Diethyl Ether 50.00 55.93 112 55.36 111 71-125 62-134 1 0-22 Carbon Disulfide 50.00 56.38 113 54.60 109 50-150 33-167 3 0-22 Carbon Tetrachloride 50.00 45.70 91 44.12 88 65-143 52-156 4 0-20 Chlorobenzene 50.00 47.00 94 47.44 95 80-120 73-127 1 0-20 Chloroethane 50.00 46.87 94 48.54 97 62-128 51-139 4 0-20 Chloroform 50.00 48.84 98 47.49 95 80-120 73-127 3 0-20 Chloromethane 50.00 41.63 83 42.99 86 43-133 28-148 3 0-20 2-Chlorotoluene 50.00 47.37 95 47.64 95 80-121 73-128 1 0-20 4-Chlorotoluene 50.00 52.00 104 53.95 108 80-120 73-127 4 0-20 Dibromochloromethane 50.00 49.88 100 49.92 100 80-123 73-130 0 0-20 1,2-Dibromo-3-Chloropropane 50.00 50.14 100 51.79 104 66-126 56-136 3 0-20 1,2-Dibromoethane 50.00 52.22 104 52.63 105 80-120 73-127 1 0-20 Dibromomethane 50.00 50.69 101 48.53 97 80-120 73-127 4 0-20 1,2-Dichlorobenzene 50.00 51.67 103 53.75 107 80-120 73-127 4 0-20 1,3-Dichlorobenzene 50.00 52.72 105 54.70 109 80-120 73-127 4 0-20 1,4-Dichlorobenzene 50.00 50.23 100 51.91 104 80-120 73-127 3 0-20 Dichlorodifluoromethane 50.00 52.81 106 52.95 106 50-150 33-167 0 0-30 1,1-Dichloroethane 50.00 52.74 105 51.84 104 72-126 63-135 2 0-20 1,2-Dichloroethane 50.00 44.48 89 43.19 86 76-120 69-127 3 0-20 1,1-Dichloroethene 50.00 53.80 108 52.36 105 66-132 55-143 3 0-20 c-1,2-Dichloroethene 50.00 59.98 120 58.88 118 78-120 71-127 2 0-20 t-1,2-Dichloroethene 50.00 57.33 115 55.76 112 66-132 55-143 3 0-20 1,2-Dichloropropane 50.00 49.15 98 48.55 97 80-120 73-127 1 0-20 RPD:Relative Percent Difference. CL:Control Limits 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 29 of 37 pages Page 15 of 22 ti® eurofins I Quality Control - LCS/LCSD Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260E Project: 804461 Page 2 of 3 Parameter aa& LCS Conc. LCS LCSD LCSD %Rec.CL ME CL RPD RPD CL Qualifiers Added %Rec: Conc. %Rec. 1,3-Dichloropropane 50.00 49.09 98 49.08 98 80-120 73-127 0 0-20 2,2-Dichloropropane 50.00 50.28 101 48.01 96 50-150 33-167 5 0-20 1,1-Dichloropropene 50.00 52.91 106 51.48 103 75-123 67-131 3 0-20 c-1,3-Dichloropropene 50.00 53.72 107 52.10 104 77-131 68-140 3 0-20 t-1,3-Dichloropropene 50.00 54.14 108 52.87 106 76-136 66-146 2 0-20 Ethylbenzene 50.00 49.86 100 49.67 99 80-120 73-127 0 0-20 2-Hexanone 50.00 53.69 107 53.38 107 63-123 53-133 1 0-20 Isopropylbenzene 50.00 51.40 103 51.12 102 80-128 72-136 1 0-20 p-Isopropyltoluene 50.00 50.98 102 52.89 106 73-133 63-143 4 0-20 Methylene Chloride 50.00 52.47 105 51.52 103 61-133 49-145 2 0-27 4-Methyl-2-Pentanone 50.00 50.09 100 50.57 101 65-125 55-135 1 0-20 Naphthalene 50.00 57.29 115 58.44 117 69-129 59-139 2 0-20 n-Propylbenzene 50.00 49.39 99 48.49 97 80-128 72-136 2 0-20 Styrene 50.00 50.98 102 51.30 103 80-126 72-134 1 0-20 1,1,1,2-Tetrachloroethane 50.00 46.55 93 47.20 94 80-129 72-137 1 0-20 0 U 1,1,2,2-Tetrachloroethane 50.00 49.76 100 51.60 103 74-122 66-130 4 0-20 Tetrachloroethene 50.00 48.46 97 48.41 97 55-139 41-153 0 0-23 Toluene 50.00 49.04 98 48.14 96 80-120 73-127 2 0-20 1,2,3-Trichlorobenzene 50.00 51.87 104 52.79 106 72-132 62-142 2 0-20 1,2,4-Trichlorobenzene 50.00 53.15 106 54.73 109 74-134 64-144 3 0-20 1,1,1-Trichloroethane 50.00 47.94 96 46.78 94 76-124 68-132 2 0-20 1,1,2-Trichloro-1,2,2- 50.00 56.57 113 54.39 109 54-150 38-166 4 0-30 Trifluoroethane 1,1,2-Trichloroethane 50.00 47.13 94 47.73 95 80-120 73-127 1 0-20 Trichloroethene 50.00 46.38 93 45.99 92 79-121 72-128 1 0-20 Trichlorofluoromethane 50.00 45.49 91 45.46 91 72-132 62-142 0 0-20 1,2,3-Trichloropropane 50.00 43.51 87 43.44 87 75-123 67-131 0 0-20 1,2,4-Trimethylbenzene 50.00 56.39 113 58.10 116 74-128 65-137 3 0-20 1,3,5-Trimethylbenzene 50.00 50.11 100 49.82 100 77-131 68-140 1 0-20 Vinyl Acetate 50.00 63.00 126 60.63 121 50-150 33-167 4 0-20 Vinyl Chloride 50.00 50.12 100 50.65 101 63-129 52-140 1 0-20 p/m-Xylene 100.0 98.83 99 98.55 99 80-122 73-129 0 0-20 o-Xylene 50.00 49.55 99 49.21 98 80-128 72-136 1 0-20 Methyl-t-Butyl Ether(MTBE) 50.00 51.21 102 50.59 101 69-123 60-132 1 0-20 Tert-Butyl Alcohol(TBA) 250.0 266.7 107 261.5 105 80-124 73-131 2 0-20 Diisopropyl Ether(DIPE) 50.00 56.56 113 55.98 112 79-121 72-128 1 0-20 Ethyl-t-Butyl Ether(ETBE) 50.00 52.55 105 52.60 105 71-125 62-134 0 0-20 Tert-Amyl-Methyl Ether(TAME) 50.00 47.12 94 46.61 93 70-124 61-133 1 0-20 Ethanol 500.0 562.0 112 584.7 117 53-149 37-165 4 0-24 1,4-Dioxane 500.0 539.2 108 521.5 104 . 80-150 68-162 3 0-20 RPD:Relative Percent Difference. CL:Control Limits 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 30 of 37 pages Page 16 of 22 ti•; eurof ins I Quality Control - LCS/LCSD Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Project: 804461 Page 3 of 3 Total number of LCS compounds:75 Total number of ME compounds:0 Total number of ME compounds allowed:4 LCS ME CL validation result:Pass 0 U 0 m K RPD:Relative Percent Difference. CL:Control Limits 7440 Lincoln Way,Garden Grove,CA 92841-1427 TEL:(714)895-5494 FAX:(714)894-7501 Page 31 of 37 pages Page 17 of 22 ti•} eurofins Sample Analysis Summary Report Calscience Work Order: 19-05-0925 Page 1 of 1 Method Extraction Chemist ID Instrument Analytical Location EPA 8260B EPA 5030C 1178 GC/MS Z 2 v 0 U 0 K Location 2:7445 Lampson Avenue,Garden Grove,CA 92841 7440 Lincoln Way,Garden Grove,CA 92841-1427 TEL:(714)895-5494 FAX:(714)894-7501 Page 32 of 37 pages Page 18 of 22 eurofins I Glossary of Terms and Qualifiers Calscience Work Order: 19-05-0925 Page 1 of 1 Qualifiers Definition See applicable analysis comment. < Less than the indicated value. > Greater than the indicated value. 1 Surrogate compound recovery was out of control due to a required sample dilution. Therefore,the sample data was reported without further clarification. 2 Surrogate compound recovery was out of control due to matrix interference. The associated method blank surrogate spike compound was in control and,therefore,the sample data was reported without further clarification. 3 Recovery of the Matrix Spike(MS)or Matrix Spike Duplicate(MSD)compound was out of control due to suspected matrix interference.The associated LCS recovery was in control. 4 The MS/MSD RPD was out of control due to suspected matrix interference. 5 The PDS/PDSD or PES/PESD associated with this batch of samples was out of control due to suspected matrix interference. 6 Surrogate recovery below the acceptance limit. 7 Surrogate recovery above the acceptance limit. B Analyte was present in the associated method blank. BU Sample analyzed after holding time expired. BV Sample received after holding time expired. Cl See case narrative. E Concentration exceeds the calibration range. ET Sample was extracted past end of recommended max.holding time. HD The chromatographic pattern was inconsistent with the profile of the reference fuel standard. HDH The sample chromatographic pattern for TPH matches the chromatographic pattern of the specified standard but heavier hydrocarbons were also present(or detected). HDL The sample chromatographic pattern for TPH matches the chromatographic pattern of the specified standard but lighter hydrocarbons were also present(or detected). J Analyte was detected at a concentration below the reporting limit and above the laboratory method detection limit. Reported value is estimated. JA Analyte positively identified but quantitation is an estimate. ME LCS Recovery Percentage is within Marginal Exceedance(ME)Control Limit range(+/-4 SD from the mean). ND Parameter not detected at the indicated reporting limit. Q Spike recovery and RPD control limits do not apply resulting from the parameter concentration in the sample exceeding the spike concentration by a factor of four or greater. SG The sample extract was subjected to Silica Gel treatment prior to analysis. X %Recovery and/or RPD out-of-range. Z Analyte presence was not confirmed by second column or GC/MS analysis. Solid-Unless otherwise indicated,solid sample data is reported on a wet weight basis,not corrected for%moisture.All QC results are reported on a wet weight basis. Any parameter identified in 40CFR Part 136.3 Table II that is designated as"analyze immediately"with a holding time of<=15 minutes (40CFR-136.3 Table II,footnote 4),is considered a"field"test and the reported results will be qualified as being received outside of the stated holding time unless received at the laboratory within 15 minutes of the collection time. A calculated total result(Example:Total Pesticides)is the summation of each component concentration and/or,if"J"flags are reported, estimated concentration. Component concentrations showing not detected(ND)are summed into the calculated total result as zero concentrations. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 • FAX:(714)894-7501 Page 33 of 37 pages Page 19 of 22 Cecile L de Guia From: Monica Van Natta Sent: Tuesday, May 14, 2019 12:42 PM To: Jaclyn Contreras Cc: Cecile L de Guia Subject: RE:804461; 19-05-0925 We need @82608_super_Calscience. Monica Van Natta Analytical Services Manager Phone: +1 559 326 4396 Email: MonicaVanNatta(o)EurofinsUS.com www.EurofinsUS.com/Eaton From: Jaclyn Contreras Sent:Tuesday, May 14, 2019 7:19 AM To: Monica Van Natta Cc: Cecile L de Guia Subject: FW: 804461; 19-05-0925 Importance: High 0 Monica, Please confirm the test list needed for the above order. Do we only need the BTEX list of the standard 8260 list.thanks Jackie Contreras From: Cecile L de Guia Sent: Monday, May 13, 2019 7:03 PM To: Jaclyn Contreras Subject: 804461; 19-05-0925 Importance: High Good evening, Please confirm if the compounds to be reported for EPA 8260B are just BTEX only?Otherwise, provide the list of compounds. Thank you. Best regards, Cecile de Guia Project Manager Eurofins Calscience, LLC 7440 Lincoln Way Garden Grove, CA 92841 USA Phone: +1 714 895 5494 Email: cecileldeguia(c)eurofinsUS.com Website:www.eurofinsUS.com/Calscience 1 Page 34 of 37 pages .ti Submittal Form Date: 5/14/2019 ti®ti e u rof i n s "REPORTING REQUIRMENTS:Do Not Combine Reports with any other samples submitted under different Folder Numbersl Eaton Analytical Report&Invoice must have the Folder# 804461 Job#1000014 Report all quality control data according to Method.Include dates analyzed. Date extracted(if extracted)and Method reference on the report. Results must have Complete data 8 QC with Approval Signature. Ship TO: Provide in each Report the Specified State Reports: Jackie Contreras Sub-Contracting Administrator EUfOfIf1S CaI$ClenCe Certification # &'Exp.Date for requested tests'+ 7440 Lincoln Way EMAIL TO:us20—subcontract@6urofinsus.com -.. matrix. Eurofins Eaton Analytical,LLC 750 Royal Oaks Drive,Suite 100,Monrovia,CA 91016 _ Samples from:CALIFORNIA Garden Grove, CA 92641-1432 Phone(626)386-1166 Fax(626)386=1122 ' Invoices to:Eurofins Eaton Analytical,LLC . Phone:714-895-5494 Fax:714-894-7501 Folder M Report Due: Sub COC#: 804461 06/03/2019 99-66484 Mv-j Sample JLS o� m �:� Client Sample ID for reference only Analysis Requested Date & Time Matrix PWS Systemcode PWSID 201905100148 Diamond Ditch @ Beginning 05/08/19 0952 DW IF Sample type: Sample Event: Facility ID: Sample Point ID:{CL_SAMPLEPOINTID) Static ID: EPA 8260B @8260B_Super_Cals 4848_8260 VOC W Super List cience U 201905100149 Travel Blank 05/08/19 0000 DW Sample type: Sample Event: Facility ID: Sample Point ID:{CL_SAMPLEPOINTID) Static ID: EPA 8260E @8260B_Super_Cals 4848_8260 VOC W Super List cience Relingtaished b__y: Sample Control Date Time NOTIFICATION REQUIRED IF RECEIVED OUTSIDE OF 0-6 CELSIUS Received by; Date Time An Acknowledgement of Receipt is.reguested to attnyJacke Contreras ---— - CD Relinquished by: o Sample Control Date Time -- -- c, Received by:; Date Time ti o Page 1 of 1 m cn 750 Royal Oaks Drive,Suite 100, Monrovia, CA 91016 Tel(626)386-1100 Fax(866)988-3757 www.EurofinsUS.com/Eaton cD w Submittal Form Date: 5/13/2019 �,•ti e u rof i n s *REPORTING REQUIRMENTS:Do Not Combine Reports with any other samples submitted under different Folder Numbersl Eaton Analytical Report&Invoice must have the Folder# 804461 Job#1000014 Report all ouality control data according to Method.Include dates analyzed. Date extracted(if extracted)and Method reference on the report. Results must have Complete data&QC with Approval Signature. Ship To: 'Eurofins CalSclencet:i: w.. .•. ,',. t !�, I� .:t !�.z �' ;; f i 'y . 7440 Lincoln Way Yiar o. a�`R,.'u�;.I ,�:5':,.' I�x� Garden Grove, CA 92641-1432 .«. s=�� t, •��7`. t�l,, w ,t�: ', ;Ihtt�+ ,r t�t".4��`�," �.ia ��.���� t•:� ti�k�t:a����e�::>��fu„. ?«;,•.. 1'. ?ag ;t %=,,'rsa' a.; x.• '- d.� Phone:714-895-5494 Fax:714-894-7501 quote 966334 19-05-0925 Folder M Report Due: Sub COCM 804461 06/03/2019 99-66431 I Sample JLS 'emrWailugfilm Client Sample ID forreference only Analysis Requested Date & Time Matrix PWS Systemcode PWSID i 201905100148 Diamond Ditch @ Beginning 05/08/19 0952 DW Sample type: Sample Event: Facility ID: Sample Point ID:{CL_SAMPLEPOINTID) Static ID: EPA 8260 @826OBTEX((Z� VOCs by EPA 8260b-BTEX List 201905100149--erravel Blank 06/00/19 0000 DW Sample type: Sample Event: Facility ID: Sample Point ID:(CL_SAMPLEPOINTID) Static ID: EPA 8260 @8260BTXM VOCs by EPA 8260b-BTXM List Sample Co Date Tlme�/f]j NOTIFICATION REQUIRED IF RECEIVED OUTSIDE OF 0-6 CELSIUS m W f Date Timeii .aI�: I � "II �.�I� ,: Kf ► tr :... ttj;, :.... o - a ontrol Date'� Time l N N , i5 0 Date /3 t Time 10S Page 1 of 1 CD in 750 Royal Oaks Drive,Suite 100,Monrovia,CA 91016RTel,(826),38 Fax(866)988-3757 www.EurofinsUS.comlEaton tig1 e u rof i n s i WORK ORDER NUMBER: Calscience SAMPLE RECEIPT CHECKLIST COOLER OF CLIENT: EF- Ahal C.-RI DATE: 05 /i3 12019 TEMPERATURE: (Criteria:0.0°C—6.0°C, not frozen except sediment/tissue) Thermometer ID:SC6(CF:-0.20C);Temperature(w/o CF): a q - I °C(w/CF): o7- 7 °C; ❑ Blank Sample ❑ Sample(s)outside temperature criteria(PM/APM contacted by: ) ❑Sample(s)outside temperature criteria but received on ice/chilled on same day of sampling ❑ Sample(s)received at ambient temperature; placed on ice for transport by courier Ambient Temperature: ❑Air ❑ Filter Checked by: 0 4 CUSTODY SEAL: Cooler ❑ Present and Intact ❑ Present but Not Intact �t Present ❑ N/A Checked by: &-A Sample(s) ❑ Present and Intact ❑ Present but Not Intact Not Present ❑N/A Checked by: aa�. SAMPLE CONDITION: Yes No NIA Chain-of-Custody(COC)document(s)received with samples................................................... )2K- ❑ ❑ COC document(s)received complete ................................................................................. ❑ ❑ ❑Sampling date ❑Sampling time ❑ Matrix ❑ Number of containers ❑ No analysis requested ❑ Not relinquished ❑ No relinquished date ❑ No relinquished time Sampler's name indicated on COC .................................................................................... ❑ ❑ 101, Sample container labels)consistent with COC ..................................................................... T ❑ ❑ N Sample container(s)intact and in good condition .................................................................. ❑ ❑ Proper containers for analyses requested ........................................................................... CK ❑ ❑ Sufficient volume/mass for analyses requested ..................................................................... Id ❑ ❑ Samples received within holding time ................................................................................. ❑ ❑ Aqueous samples for certain analyses received within 15-minute holding time ❑ pH ❑ Residual Chlorine ❑Dissolved Sulfide ❑ Dissolved Oxygen .............................. ❑ ❑ Proper preservation chemical(s)noted on COC and/or sample container..................................... ❑ ❑ Unpreserved aqueous sample(s)received for certain analyses ❑Volatile Organics ❑Total Metals ❑ Dissolved Metals Acid/base preserved samples-pH within acceptable range ..................................................... ❑ ❑ Contai r(s)for certain analysis free of headspace.................................................................. ❑ ❑ Volatile Organics ❑ Dissolved Gases(RSK-175) ❑ Dissolved Oxygen(SM 4500) ❑ Carbon Dioxide(SM 4500) ❑ Ferrous Iron(SM 3500) ❑ Hydrogen Sulfide(Hach) TedlarTm bag(s)free of condensation ................................................................................. ❑ ` ❑ CONTAINER TY7VOAh )(i-z}P- (Trip Blank Lot Number: //A 1 Aqueous:❑VOA ❑VOAnaz ❑100PJ ❑100PJna2 ❑125AGB ❑125AGBh ❑ 125AGBp ❑125PB ❑125PBznna(pH_9) ❑250AGB ❑250CGB ❑250CGBs(pH_2) ❑250PB ❑250PBn(pH-2) ❑500AGB ❑500AGJ ❑500AGJs(pH_2) ❑500PB ❑1AGB ❑1AGBna2 ❑1AGBs(pH_2) ❑1AGBs(O&G)❑1PB ❑1PBna(pH_12) ❑ ❑ ❑ Solid:❑4ozCGJ ❑8ozCGJ ❑16ozCGJ ❑Sleeve U ❑EnCore?U ❑TerraCores®U❑ ❑ ❑ Air.❑Tedlar'rm ❑Canister ❑Sorbent Tube ❑PUF ❑ Other Matrix( ):❑ ❑ ❑ Container:A=Amber,B=Bottle,C=Clear,E=Envelope,G=Glass,J=Jar,P=Plastic,and Z=Ziploc/Resealable Bag Preservative:b=buffered,f=filtered,h=HCI,n=HNO3,na=NaOH,nag=Na2S203,p=H3PO4, Labeled/Checked by: s=H2SO4,u=ultra-pure,x=Na2SO3+NaHSO4.H2O,znna=Zn(CH3CO2)2+NaOH Reviewed by: tiff eurofins ` Q::— Eaton Analytical �# A C C R E D I T E D ��� � TESTWGTA60MTOR� 750 Royal Oaks Drive,Suite 100 Monrovia,California 91016-3629 ��T/i I ��``\` AT-1 807 Tel:(626)386-1100 Fax:(866)988-3757 1 800 566 LABS(1 800 566 5227) Laboratory Report for South Lake Tahoe Public Utilities District 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Attention: Daniel Arce Fax: 530-541-0614 . �REcoc� r Date of Issue 06/2V-"� 6/2019 Utah ELCP CA00006 EUROFINS EATON ANALYTICAL, LLC Report:808532 Project:SPECIAL UMVN: Monica Van Natta Group:8260+oygenates Project Manager Accredited in accordance with TNI 2016 and ISO/IEC 17025:2017 Laboratory certifies that the test results meet all TNI 2016 and ISO/IEC 17025:2017 requirements unless noted under the individual analysis Following the cover page are State Certification List,ISO/IEC 17025:2017 Accredited Method List,Acknowledgement of Samples Received,Comments, Hits Report,Data Report,QC Summary,QC Report and Regulatory Forms,as applicable Test results relate only to the sample(s)tested. Test results apply to the sample(s)as received,unless EEA-M collected and analyzed the sample(s)as noted in the COC and final report. This report shall not be reproduced except in full,without the written approval of the laboratory This report includes ISO/IEC 17025 2017 and non-ISO/IEC 17025.2017 accredited methods. Page 1 of 27 pages eurofins Eaton Analytical STATE CERTIFICATION LIST State Certification Number State Certification Number Alabama 41060 Montana Cert 0035 Arizona AZ0778 Nebraska Certified Arkansas Certified Nevada CA000062018 California 2813 New Hampshire ' 2959 Colorado Certified New Jersey' CA 008 Connecticut PH-0107 New Mexico Certified Delaware CA 006 New York' 320 �:Iorida ' E871024 North Carolina 06701 Georgia 947 North Dakota R-009 Guam 18-005R Oregon" CA200003-005 Hawaii Certified Pennsylvania' 68-565 Idaho Certified Puerto Rico Certified 111i',ol, 200033 Rhode Island LA000326 Indiana C-CA-01 South Carolina 87016 Iowa-Asbestos 413 South Dakota Certified Kansas E-10268 Tennessee TN02839 Kentucky 90107 Texas' 1-104704230-18-15 Louisiana ` LA180000 Utah (Primary AB) ' CA00006 Maine CA0006 Vermont VTO114 Maryland 224 Virginia' 160260 Commonwealth of MP0004 Washington C838 Northern Marianas Is. Massachusetts M-CA006 EPA Region 5 Certified Michigan 9906 Los Angeles County 10264 Sanitation Districts Mississippi Certified * NELAP/TNI Recognized Accreditation Bodies Eurofins Eaton Analytical, LLC 750 Royal Oaks Drive,Suite 100 T i 626-386-1100 Monrovia, CA 91016-3629 F 1 866-988-3757 www.EurofinsUS.com/Eaton Page 2 of 27 pages IRRIGATION DITCHES i Site: SW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: ICR Effluent ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 03/07/19 3.8 7.44 - 60 71 1.23 0.060 0.010 0.470 < 0.020 < 0.010 0.022 Maximum 3.8 7.44 60 71 1.23 0.060 0.010 0.470 < 0.020 < 0.010 0.022 Minimum 3.8 7.44 60 71 1.23 0.060 0.010 0.470 < 0.020 < 0.010 0.022 Average 3.8 7.44 60 71 1.23 0.060 0.010 0.470 < 0.020 < 0.010 0.022 #Tests 1 1 0 0 0 1 1 1 1 1 0 0 1 1 1 1 Site: SW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: ICR Effluent ALPINE COUNTY SURFACEWATER QUALITY DATA 2019 Oil & Coliforms Fecal <-Blue Green Algae-> Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep colonies Filaments Filamame Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 03/07/19 0.492 11.2 1.33 Maximum 0.492 0 0 0 0 0 0 0 11.2 1.33 Minimum 0.492 0 0 0 0 0 0 0 11.2 1.33 Average 0.492 11.2 1.33 #Tests 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 Site: SW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: ICR Effluent ALPINE COUNTY SURFACEWATER QUALITY DATA From: 2000 To: 2019 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 00 5.2 7.22 103 0.060 01 7.0 .7.46 51 8.31 9.4 78 109 1.4 0.060 <0.010 0.01 2.15 0.680 <0.100 <0.010 <0.010 0.700 02 8.1 6.74 8.20 4.9 110 1.7 0.040 <0.010 0.680 0.050 <0.010 <0.010 0.700 22 03 8.4 7.72 5.05 14.8 86 1.7 0.040 0.010 0.777 0.022 0.010 0.010 0.797 04 No samples collected 05 6.2 7.78 45 7.05 5.6 69 96 2.1 0.037 <0.010 0.586 0.028 <0.010 0.060 0.656 06 No samples collected 07 10.3 7.86 46 11.7 71 106 1.5 0.073 <0.010 0.650 0.033 <0.010 <0.010 0.670 23 08 7.5 8.31 54 6.2 83 113 2.0 0.068 0.012 1.100 0.082 <0.010 0.172 1.282 33 09 No samples collected 10 8.7 8.00 52 7.3 79 114 2.0 0.058 <0.010 1.510 0.027 <0.010 <0.010 1.530 11 No samples collected 12 No samples collected 13 No samples collected 14 9.0 7.82 50 2.00 3.5 71 94 1.3 0.035 <0.010 2.26 0.787 0.020 <0.010 <0.010 0.787 15 No samples collected 16 No samples collected 17 No samples collected 18 No samples collected 19 3.8 7.44 60 71 1.2 0.060 0.010 0.470 <0.020 <0.010 0.022 0.492 Maximum 10.3 8.31 54 8.31 14.8 83 114 2.1 0.073 0.012 0.01 2.26 1.510 - 0.100 0.010 0.172 1.530 33 Minimum 3.8 6.74 45 2.00 3.5 60 71 1.2 0.035 <0.010 0.01 2.15 0.470 <0.020 <0.010 <0.010 0.492 22 Average 7.4 7.64 50 6.12 7.9 73 100 1.6 0.053 0.010 0.01 2.21 0.804 0.042 0.010 0.035 0.846 26 #Tests 10 10 6 5 8 7 10 9 10 9 1 2 9 9 9 9 9 3 0 0 Site: SW-11 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: ICR Effluent ALPINE COUNTY SURFACEWATER QUALITY DATA From: 2000 To: 2019 Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Ca Mg Na SAR Na Total E.coli Strep -Colonies- <-Filaments-> <-Filamaments-> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells m /L m /L mg/L 00 01 12.00 2.02 6.62 0.47 26.0 17 < 17 4.28 02 03 10.85 4.06 04 05 10.80 2.08 06 07 3 <3 10.11 2.73 08 8 <2 11.29 4.38 09 10 13 <2 4.08 11 12 13 14 10.20 2.42 7.03 0.51 28.5 29 < 1 9.28 2.50 15 16 17 18 19 11.2 1.33 Maximum 12.00 2.42 7.03 0.51 28.5 29 17 0 0 0 0 0 0 0 11.29 4.38 Minimum 10.20 2.02 6.62 0.47 26.0 3 < 1 0 0 0 0 0 0 0 9.28 1.33 Average 11.10 2.22 6.83 0.49 27.3 14 5 10.59 3.18 #Tests 2 2 2 2 2 5 5 0 0 0 0 0 0 0 0 6 8 0 Site : SW-11 Nitrate-Nitrogen Total Phosphorus 05 k 0.5 - 04 } 0.4 0.3 I 0.3 J J E E 0.2 0.2 0.1 0.1 0.0 0.0 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 —G—Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 10 200 9 8 150 - 7 6 rn 5 a 100 E E 4 3 - -- 50 - 2 0 01V 1 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 —�Chlorides Linear(Chlorides) TDS Linear(TDS) Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25"above Fredericksburg Ditch 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 05/08/19 17.8 8.35 219 473 50.9 2.26 2.07 18.0 18.2 0.259 0.872 06/04/19 18.8 8.22 226 468 52.8 2.34 1.99 18.1 16.7 0.372 0.931 07/09/19 20.1 8.35 238 587 57.3 2.57 2.42 19.3 17.3 0.666 1.52 08/08/19 21.6 8.28 263 �526 56.7 3.38 3.12 13.6 12.8 1.16 2.77 09/04/19 19.9 8.18 293 654 62.0 4.13 3.54 16.7 15.7 1.13 2.66 10/03/19 9.1 8.22 303 641 72.2 3.58 3.26 24.3 20.5 0.725 4.10 Maximum 21.6 8.35 303 654 72.2 4.13 3.54 24.3 20.5 1.16 4.10 Minimum 9.1 8.18 219 468 50.9 2.26 1.99 13.6 12.8 0.259 0.872 Average 17.9 8.27 257 558 58.7 3.04 2.73 18.3 16.9 0.719 2.14 #Tests . 6 6 0 0 0 6 6 6 6 6 0 0 6 6 6 6 Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25"above Fredericksburg Ditch 2019 Oil & Coliforms Fecal <--Blue Green Algae--> Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonie£Filament Filamai Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 05/08/19 19.1 8.37 13.0 06/04/19 19.4 8.07 12.7 07/09/19 21.5 5.20 13.6 08/08/19 17.5 7.25 14.2 09/04/19 20.5 7.44 15.5 10/03/19 29.1 6.83 17.8 Maximum 29.10 8.37 17.8 Minimum 17.50 5.20 12.7 Average 21.18 7.19 14.5 #Tests 6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 6 0 Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25"above From: 2001 Fredericksburg Ditch To: To: 2019 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Year C pH mg/L NTU m /L m /L umhos m /L m /L m /L mg/L m /L m /L m /L m /L m /L m /L m /L m /L m /L 01 18.6 8.23 243 489 62.2 2.69 2.56 15.37 13.97 0.59 1.44 17.39 03 17.5 8.01 296 436 57.2 2.48 2.26 11.48 9.00 1.97 2.78 16.23 03 17.0 7.93 241 465 58.2 2.56 2.35 13.92 11.50 0.71 2.77 17.40 04 17.7 8.16 243 490 61.8 3.13 2.95 14.48 13.51 0.68 2.89 18.04 05 16.1 7.83 217 361 39.1 2.37 2.32 10.14 9.17 0.55 1.78 12.47 O6 17.5 8.24 229 438 47.4 2.57 2.40 14.26 13.12 0.53 1.69 16.52 07 18.2 8.26 270 503 56.0 3.19 2.90 16.92 14.24 0.63 1.22 18.77 08 17.4 8.25 254 470 54.7 3.31 2.99 12.68 10.19 0.88 2.58 16.13 09 20.2 8.38 259 503 53.6 3.40 .3.20 13.13 12.17 1.15 2.24 9.91 10 17.5 8.25 257 483 53.6 3.14 2.95 12.00 9.95 1.15 2.93 16.07 11 18.2 8.35 205 388 43.7 1.99 1.90 8.30 6.11 1.46 3.34 13.11 12 20.6 8.45 256 468 52.6 2.98 2.73 11.91 9.27 1.82 4.21 17.94 13 18.0 8.02 252 448 50.6 2.65 2.54 11.85 9.59 0.86 4.01 16.72 14 17.3 8.16 286 524 44.6 3.31 2.28 15.63 11.92 0.55 3.74 19.93 15 17.0 7.97 278 489 53.8 3.27 3.11 10.64 8.48 1.79 6.10 18.53 16 14.8 7.50 33.3 200 382 33.5 2.28 1.67 9.29 7.43 0.68 2.02 11.99 17 17.4 7.97 173 324 35.5 1.54 1.38 10.85 5.42 0.98 2.90 14.72 18 19.6 8.21 272 549 60.7 3.26 2.39 19.15 16.75 0.70 1.38 21.23 19 17.9 8.27 257 558 58.7 3.04 2.73 18.33 16.87 0.72 2.14 21.18 Maximum 20.6 8.45 33.3 296 558 62.2 3.40 3.20 19.15 16.87 1.97 6.10 21.23 Minimum 14.8 7.50 33.3 173 324 33.5 1.54 1.38 8.30 5.42 0.53 1.22 9.91 Average 17.8 8.13 33.3 247 461 51.4 2.80 2.51 13.18 10.98 0.97 2.75 16.54 #Tests 19 19 0 0 1 19 19 19 19 19 0 0 19 19 19 19 19 0 0 0 Site: SW-12 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Bruns Diversion ALPINE COUNTY SURFACEWATER QUALITY DATA 25"above From: 2001 Fredericksburg Ditch To: 2019 Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Ca Mg Na SAR Na Total E.coli Strep <-Colonies-> <-Filaments-> <-Filamaments-> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 01 7.95 18.72 03 6.44 16.96 03 6.82 18.70 04 8.27 16.85 05 6.96 13.11 06 7.53 13.26 07 6.94 15.22 08 7.31 15.28 09 7.70 15.80 10 6.35 15.55 11 7.58 12.47 12 6.32 15.17 13 6.53 15.50 14 7.17 12.29 15 7.85 18.10 16 9.23 9.59 17 7.78 8.92 18 7.51 13.90 19 7.19 14.5 Maximum 0 0 0 0 0 0 0 9.23 18.72 Minimum 0 0 0 0 0 0 0 6.32 8.92 Average 7.34 14.73 #Tests 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 19 19 0 Site : SW-12 Nitrate-Nitrogen Total Phosphorus 10.0 10.0 9.0 9.0 8.0 8.0 7.0 7.0 6.0 6.0 rn 5.0 - - rn 5.0 E E 4.0 4.0 3.0 3.0 2.0 -_ _ 2.0 1.0 1.0 0.0 0.0 01 03 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 01 03 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 t Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 100 - 500 90 80 400 70 60 300 - - J J m 50 as E E 40 200 30 - 20 100 10 0 0 01 03 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 01 03 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 —�—Chlorides Linear(Chlorides) +TDS Linear(TDS) Site: SW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredericksburg Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 100' below confluence with reclaimed water 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 5/8/2019 6.0 7.73 44 49 1.74 0.078 0.045 0.474 0.308 < 0.010 0.027 6/4/2019 9.0 7.99 47 71.2 3.07 0.157 0.126 0.958 0.917 0.036 0.086 7/9/2019 13.5 9.21 42 67.4 2.86 0.134 0.122 0.763 0.740 0.031 0.074 8/8/2019 16.4 8.08 74 116 5.32 0.310 0.284 1.27 1.18 0.099 0.241 9/4/2019 17.6 8.07 78 116 5.43 0.305 0.280 1.22 1.07 0.085 0.230 10/03/19 6.9 7.63 65 84 2.06 0.073 0.059 0.380 0.240 0.010 0.129 Maximum 17.6 9.21 78 116 5.43 0.310 . 0.284 1.27 1.18 0.099 0.241 Minimum 6.0 7.63 42 49 1.74 0.073 0.045 0.380 0.240 < 0.010 0.027 Average 11.6 8.12 58 84 3.41 0.176 0.153 0.844 0.743 0.045 0.131 #Tests 6 6 0 0 0 6 6 6 6 6 0 0 6 6 6 6 Site: SW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredericksburg Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 100' below confluence with reclaimed water 2019 Oil & Coliforms Fecal--Blue Green Algae--------Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filaments Filamam( Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN #cells # cells # um q cells mg/L mg/L mg/L 5/8/2019 0.501 11.64 1.49 6/4/2019 1.08 9.92 1.54 742019 0.868 8.41 1.50 8/8/2019 1.61 8.28 2.40 9/4/2019 1.54 8.40 2.43 10/03/19 0.519 8.51 2.24 Maximum 1.610 11.64 2.43 Minimum 0.501 8.28 1.49 Average 1.020 9.19 1.93 #Tests 6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 6 0 Site: SW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredericksburg Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 100'below confluence From: 2001 with reclaimed water To: 2019 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO,-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 01 16.3 7.72 106 179 16.3 0.63 0.61 3.79 4.40 0.16 0.40 4.35 02 13.2 7.72 101 153 14.4 0.73 0.53 1.99 1.97 0.20 0.74 2.93 03 12.7 7.80 97 155 13.8 0.60 0.53 3.21 2.73 0.16 0.48 3.85 04 12.6 7.65 108 178 17.1 0.89 0.77 3.68 3.56 0.18 0.77 4.63 05 11.8 7.61 85 115 10.1 0.48 0.47 1.88 1.53 0.14 0.36 2.38 06 12.5 7.72 106 171 15.6 0.79 0.72 5.08 4.39 0.14 0.50 5.72 07 13.5 7.71 98 152 11.6 0.57 0.51 2.91 2.33 0.11 0.20 3.21 O8 13.4 7.86 144 252 25.4 1.50 1.37 5.76 4.53 0.46 1.33 7.55 09 13.6 7.68 103 174 14.7 0.94 0.85 3.10 2.70 0.30 0.62 4.02 10 10.3 7.37 77 105 7.3 0.31 0.28 0.87 0.64 0.09 0.61 1.57 11 13.0 8.28 114 182 15.8 0.76 0.71 2.89 1.97 0.61 1.24 4.74 12 12.7 7.16 73 91 4.5 0.20 0.17 0.61 0.23 0.10 0.59 1.30 13 15.8 7.56 86 133 8.6 0.44 0.42 1.75 1.23 0.14 0.48 2.36 14 16.1 7.89 105 185 13.7 0.71 0.67 2.43 2.45 0.16 1.11 3.68 15 14.0 7.39 78 117 5.8 0.28 0.25 0.85 0.51 0.12 0.61 1.57 16 12.5 7.40 0.8 116 190 17.0 1.02 0.83 3.30 2.61 0.31 1.06 4.66 17 12.3 7.62 66 90 5.6 0.21 0.17 0.78 0.46 0.14 0.44 1.36 18 15.9 7.87 116 199 17.7 0.94 1.22 1.71 4.87 0.22 0.38 1.87 19 11.6 8.12 58 84 3.41 0.18 0.15 0.84 0.74 0.05 0.13 1.02 Maximum 16.3 8.28 0.8 144 252 25.4 1.50 1.37 5.76 4.87 0.61 1.33 7.55 Minimum 10.3 7.16 0.8 58 84 3.4 0.18 0.15 0.61 0.23 0.05 0.13 1.02 Average 13.4 7.69 0.8 97 153 12.6 0.64 0.59 2.50 2.31 0.20 0.63 3.30 #Tests 19 19 0 0 1 19 19 19 19 19 0 0 19 19 19 19 19 0 0 0 Site: SW-13 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Fredericksburg Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA 100'below confluence From: 2001 with reclaimed water To: 2019 Coliforms Fecal/ Fecal <- Blue Green Algae-- - ---> Single Hard- Ca Mg Na SAR Na Total E.coli Strep <-Colonies--> <-Filaments-> <-Filamaments-> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 01 8.56 6.10 02 8.50 5.69 03 7.93 5.42 04 7.81 5.66 05 8.36 4.03 06 8.07 5.40 07 8.10 4.44 08 8.20 8.04 09 8.62 5.09 10 7.45 3.31 11 8.88 5.37 12 8.33 2.68 13 6.94 4.03 14 7.87 5.26 15 8.93 3.64 16 9.27 5.72 17 9.01 2.04 18 8.47 4.50 19 9.19 1.93 Maximum 0 0 0 0 0 0 0 9.27 8.04 Minimum 0 0 0 0 0 0 0 6.94 1.93 Average 8.34 4.65 #Tests 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 19 19 0 Site: SW-13 Nitrate-Nitrogen Total Phosphorus 5.0 5.0 4.0 4.0 3.0 3.0 J J a E E 2.0 2.0 1.0 1.0 - 0.0 0.0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 t Nitrate Linear(Nitrate) +Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 50 500 40 400 30 300 J J Of 00 20 E 200 10 100 A A 0 0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 —4--Chlorides Linear(Chlorides) t TDS Linear(TDS) Site: SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT - Stream: Cello Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 05/08/19 8.9 7.90 119 185 15.0 0.596 0.487 3.90 3.75 0.090 0.371 06/04/19 Dry 07/09/19 15.6 7.92 341 591 67.1 1.64 1.66 1.86 1.02 0.050 4.11 08/08/19 18.6 7.46 288 511 56.1 3.07 2.87 6.9 7.18 0.777 5.86 09/04/19 19.5 7.58 324 621 62.8 3.82 3.26 10.2 8.39 0.443 6.71 10/03/19 7.1 7.77 320 583 62.8 2.66 2.56 12.2 10.1 0.176 7.84 Maximum 19.5 7.92 341 621 67.1 3.82 3.260 12.2 10.1 0.777 7.84 Minimum 7.1 7.46 - 119 185 15.0 0.596 0.487 1.86 1.02 0.050 0.371 Average 13.9 7.73 278 498 52.8 2.36 2.17 7.01 6.09 0.307 4.98 #Tests 5 5 0 0 0 5 5 5 5 5 0 0 5 5 5 5 Site: SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Cello Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion 2019 Oil & Coliforms Fecal <--------------------------Blue Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep <------Cc<-----Fila<---FilaiCells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 05/08/19 4.36 10.26 5.41 06/04/19 07/09/19 6.02 7.52 13.9 08/08/19 13.5 5.55 11.9 09/04/19 17.4 6.16 16.0 10/03/19 20.2 7.20 18.6 Maximum 20.2 10.26 18.6 Minimum 4.36 5.55 5.41 Average 12.3 7.34 13.2. #Tests 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 5 0 Site: SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Cello Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion From: 2001 To: 2019 Oil& Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Grease Year C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 01 15.7 7.73 245 398 44.0 1.40 1.35 4.43 2.96 0.29 1.39 6.11 02 14.1 7.69 220 325 36.9 1.27 1.13 2.98 1.94 0.18 1.87 5.03 03 13.5 7.45 255 395 44.6 1.35 1.24 2.72 2.14 0.24 2.96 5.92 04 13.2 7.49 228 373 46.2 1.80 1.76 5.15 4.77 0.27. 3.41 8.83 05 12.1 7.42 173 239 27.3 1.23 1.20 3.61 2.98 0.15 1.77 5.53 O6 13.8 7.47 207 311 33.7 1.54 1.49 4.98 4.02 0.29 3.12 8.39 07 13.7 7.65 268 413 46.7 2.08 1.95 6.47 4.77 0.25 2.31 9.02 08 13.7 7.60 221 348 39.9 1.83 1.70 3.44 2.59 0.32 3.42 6.15 09 12.8 7.50 173 250 21.1 0.95 0.64 1.39 0.05 0.04 1.00 2.43 10 10.5 7.71 116 160 15.2 0.54 0.49 0.48 0.02 0.07 1.10 1.64 11 14.4 7.88 189 204 33.0 1.09 0.89 1.94 0.67 0.28 2.33 4.55 12 13.4 7.23 189 314 27.3 1.27 1.09 5.80 4.15 0.17 1.04 7.01 13 17.8 7.48 313 494 52.8 1.89 1.66 3.01 3.59 0.36 3.09 5.34 14 17.2 7.56 291 520 54.0 2.76 2.20 6.01 5.47 0.71 4.09 10.81 15 17.3 7.47 296 478 46.2 2.22 2.04 4.84 3.40 0.91 4.40 10.11 16 17.7 7.23 1.2 267 433 43.7 1.83 1.63 4.25 3.00 0.70 2.44 7.38 17 19.7 7.73 229 402 40.6 1.26 1.13 2.22 1.83 0.44 2.71 5.41 18 17.6 7.92 264 432 49.0 2.22 1.54 9.94 10.59 0.46 2.29 12.69 19 13.9 7.73 278 498 52.8 2.36 2.17 7.01 6.09 0.31 4.98 12.30 Maximum 19.7 7.92 1.2 313 520 54.0 2.76 2.20 9.94 10.59 0.91 4.98 12.69 Minimum 10.5 7.23 1.2 116 160 15.2 0.54 0.49 0.48 0.02 0.04 1.00 1.64 Average 14.8 7.58 1.2 233 368 39.7 1.63 1.44 4.25 3.42 0.34 2.62 7.09 #Tests 19 19 0 0 1 19 19 19 19 19 0 0 19 19 19 19 19 0 0 0 Site: SW-15 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Cello Tailwater ALPINE COUNTY SURFACEWATER QUALITY DATA @ Brooke Diversion From: 2001 To: 2019 Colifcrms Fecal/ Fecal < Blue Green Algae > Single Hard- Ca Mg Na SAR Na Total E.coli Strep <-Colonies-> <-Filaments-> <-Filamaments-> Cells D.O. SO4 ness Year mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells m /L m /L m /L 01 7.99 14.47 02 8.34 10.85 03 5.36 14.46 04 6.54 11.95 05 7.03 8.55 06 6.24 10.43 07 6.32 12.81 08 6.76 11.13 09 7.80 6.66 10 7.14 6.31 11 7.17 8.81 12 8.30 7.58 13 8.04 17.43 14 6.04 15.86 15 5.93 15.34 16 8.30 14.03 17 6.82 9.96 18 6.72 12.39 19 7.34 13.2 Maximum 0 0 0 0 0 0 0 8.34 17.43 Minimum 0 0 0 0 0 0 0 5.36 6.31 Average 7.06 11.69 #Tests 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 19 19 0 Site : SW-15 Nitrate-Nitrogen Total Phosphorus 10.0 - 10.0 9.0 X 9.0 8.0 - - -- ---- 8.0 7.0 7.0 6.0 - -- 6.0 rn 5.0 or 5.0 E E 4.0 4.0 3.0 3.0 2.0 2.0 1.0 1.0 0.0 Im 0.0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 t Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 100 500 90 80 400 70 ---- -_ 60 - 300 o6 50 E E 40 200 30 - 20 100 10 0 0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 t Chlorides Linear(Chlorides) -t—TDS Linear(TDS) Site: SW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Drain Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA @ Fairview Lane 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO4-P Boron K TKN NH3-N NO2-N NO3-N Date C pH mg/L NTU mg/L mg/L umhos mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 05/08/19 20.5 7.42 124 162 8.87 0.180 0.067 0.988 0.035 < 0.010 0.082 06/04/19 18.6 7.44 131 199 16.4 0.350 0.139 2.20 1.23 0.052 0.739 07/09/19 19.3 8.75 140 186 14.0 0.100 < 0.010 0.733 0.020 < 0.010 0.069 08/08/19 19.8 7.25 164 218 21.6 0.242 < 0.020 1.18 0.027 < 0.020 0.024 09/04/19 16.6 7.58 146 243 18.5 0.127 0.033 0.614 < 0.020 < 0.010 0.176 10/03/19 10.5 7.69 136 197 13.9 0.054 0.025 0.218 < 0.020 < 0.010 0.524 Maximum 20.5 8.75 164 243 21.6 0.350 0.139 2.200 1.230 0.052 0.739 Minimum 10.5 7.25 124 162 8.87 0.054 < 0.010 0.218 < 0.020 < 0.010 0.024 Average 17.6 7.69 140 201 15.5 0.176 0.049 0.989 0.225 0.019 0.269 #Tests 6 6 0 0 0 6 6 6 6 6 0 0 6 6 6 6 Site: SW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Drain Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA @ Fairview Lane 2019 Oil & Coliforms Fecal <-Blue Green Algae-> Single Hard- Total N COD BOD Grease Ca Mg Na SAR Na Total E. coli Strep Colonies Filaments Filamamei Cells D.O. SO4 ness Date mg/L mg/L mg/L mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 05/08/19 1.07 8.50 3.24 06/04/19 2.99 8.10 4.15 07/09/19 0.802 8.06 3.84 08/08/19 1.20 7.24 6.82 09/04/19 0.790 8.52 6.11 10/03/19 0.742 8.77 5.80 Maximum 2.99 8.77 6.82 Minimum 0.742 7.24 3.24 Average 1.27 8.20 4.99 #Tests 6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 6 0 Site: SW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Drain Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA @ Fairview Lane From: 2001 To: 2019 Temp Alkalinity Turbidity SS TDS EC Chloride Total P PO,-P Boron K TKN NH3-N NO2-N NO3-N Total N COD BOD Year C pH mg/L NTU mg/L m /L umhcs m /L m /L m /L m /L m /L m /L mg/L m /L m /L mg/L m /L m /L 01 02 14.5 7.53 177 263 21.5 0.060 0.020 _ 0.460 0.050 <0.010 0.070 0.550 03 15.6 7.67 159 233 19.5 0.104 0.026 0.577 0.070 0.016 0.101 0.736 04 15.1 7.50 154 226 18.9 0.190 0.019 0.879 0.074 0.017 0.103 1.00 05 14.8 7.30 158 206 21.7 0.089 0.027 1.127 0.044 0.016 0.169 1.31 O6 15.3 7.37 154 206 18.9 0.124 0.058 0.984 0.353 0.021 0.342 1.35 07 15.7 7.59 160 227 17.8 0.070 0.018 0.475 0.026 <0.010 0.084 0.569 08 15.6 7.70 165 244 20.3 0.075 0.029 0.735 0.064 0.033 0.160 0.928 09 17.1 7.64 193 301 23.5 0.597 0.333 2.358 1.439 0.134 1.18 3.67 10 14.8 7.43 192 282 25.7 0.146 0.032 0.790 0.035 <0.010 0.147 0.947 11 15.6 7.70 161 228 20.7 0.216 0.102 1.196 0.112 0.064 0.404 1.66 12 19.6 7.38 152 231 15.5 0.111 0.028 0.771 0.243 <0.010 0.145 0.925 13 18.0 7.31 181 253 19.9 0.096 0.030 0.742 0.074 0.031 0.152 0.911 14 19.0 7.60 196 266 20.7 0.060 0.024 0.543 0.037 0.012 0.132 0.671 15 17.3 7.31 184 277 21.5 0.068 0.019 0.375 0.022 <0.010 0.011 0.377 16 17.7 7.24 3.3 183 273 22.5 0.093 0.025 0.684 0.024 0.011 0.049 0.733 17 18.5 7.25 177 251 17.9 0.169 0.046 1.100 0.044 0.011 0.125 1.23 18 19.4 7.82 171 255 19.6 0.117 0.046 0.593 0.021 0.013 0.052 0.646 19 17.6 7.69 140 201 15.5 0.176 0.049 0.989 0.225 0.019 0.269 1.27 Maximum 19.6 7.82 3.3 196 301 25.7 0.597 0.333 2.358 1.439 0.134 1.18 3.67 Minimum 14.5 7.24 3.3 140 201 15.5 0.060 0.018 0.375 0.021 <0.010 0.011 0.377 Average 16.7 7.50 3.3 170 246 20.1 0.142 0.052 0.854 0.164 0.025 0.205 1.08 #Tests 18 18 0 0 1 18 18 18 18 18 0 0 18 18 18 18 18 0 0 Site: SW-16 SOUTH TAHOE PUBLIC UTILITY DISTRICT Stream: Drain Ditch ALPINE COUNTY SURFACEWATER QUALITY DATA @ Fairview Lane From: 2001 To: 2019 Oil& Coliforms Fecal/ Fecal < Blue Green Algae > Single Hard- Grease Ca Mg Na SAR Na Total E.coli Strep <-Colonies-> <-Filaments-> <-Filamaments-> Cells D.O. SO4 ness Year mg/L mg/L mg/L mg/L % MPN MPN MPN # cells # cells # um #cells mg/L mg/L mg/L 01 02 6.97 8.04 03 7.03 6.75 04 7.73 6.35 05 8.79 6.95 O6 8.90 6.05 07 8.27 6.36 08 7.61 7.85 09 7.80 7.66 10 6.34 7.05 11 8.26 5.21 12 8.88 6.58 13 8.60 7.77 14 8.46 7.41 15 7.12 5.66 16 9.10 7.14 17 7.75 3.80 18 9.77 6.62 19 8.20 4.99 Maximum 0 0 0 0 0 0 0 9.77 8.04 Minimum 0 0 0 0 0 0 0 6.34 3.80 Average 8.09 6.57 #Tests 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18 18 0 Site: SW-16 Nitrate-Nitrogen Total Phosphorus 5.0 1.0 0.9 4.0 0.8 0.7 3.0 0.6 — -- J J a rn 0.5 E E 2.0 0.4 0.3 1.0 0.2 - 0.1 0.0 0.0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 t Nitrate Linear(Nitrate) t Total Phosphorus Linear(Total Phosphorus) Chlorides Total Dissolved Solids 50 250 40 200 30 - -- - - 150 J_ J to tx E E 20 100 10 50 0 0 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 +Chlorides Linear(Chlorides) +TDS Linear(MS) TRIHALOMETHANES (THM) MTBE (Methyl tent-Butyl Ether) MONITORING MTBE Results Lower Sample Reporting Sample Site Date ID# Parameter Result Units Limit Method WWTP Final Effluent 02/06/2019 AG65215 MTBE ND ug/L 2 EPA 8260E 05/30/2019 AG66787 MTBE ND ug/L 3.0 EPA 524.2 12/03/2019 AG69832 MTBE ND ug/L 2 EPA 8260E Harvey Place Reservoir 06/03/2019 AG66838 MTBE ND ug/L 0.2 EPA8260 HPR Effluent 05/08/2019 AG66349 MTBE ND ug/L 2 EPA 8260B ND =Not Detected at or above Lower Reporting Limit ug/L =micrograms per liter or parts per billion ti•;�' eurofins Eaton Analytical / \ � TESIWG WBORP TORS 750 Royal Oaks Drive,Suite 100 Monrovia,California 91016-3629 ��/8 1I1110V` AT-1807 Tel:(626)386-1100 Fax:(866)988-3757 1 800 566 LABS(1 800 566 5227) Laboratory Report for South Lake Tahoe Public Utilities District 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Attention: Daniel Arce Fax- 530-541-0614 Date of Issue 05/24/2019 EUROFINS EATV Utah ELCP CA00006 ANALYTICAL, LLC Report:804461 Project:SPECIAL UMVN: Monica Van Natta Group:8260+oygenates Project Manager Accredited in accordance with TNI 2016 and ISO/IEC 17025:2017. 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Massachusetts M-CA006 EPA Region 5 Certified Michigan 9906 Los Angeles County 10264 Sanitation Districts Mississippi Certified NELAP/TNI Recognized Accreditation Bodies Eurofins Eaton Analytical, LLC 750 Royal Oaks Drive, Suite 100 T 626-386-1100 Monrovia, CA 91016-3629 F 866-988-3757 www.EurofinsUS.com/Eaton Page 2 of 37 pages ISO 17025 Accredited Method List The tests listed below are accredited and meet the requirements of ISO 17025 as verified by the ANSI-ASQ National Accreditation Board/ANAB. Refer to Certificate and scope of accreditation(AT 1807)found at:http://www.eatonanalytical.com nviron- nvtron- nvtron- nviron- Component of wmer na a METHOD OR mental mental Food and METHOD OR mental mental SPECIFIC TESTS TECHNI UE USED (Drinking (Waste Bov/Bev/ SPECIFIC TESTS TECHNI UE USED (Drinking (Waste Cumpavemnr Q Q rwa a.a a.vBaev Water) Water) Bottled!Water Water) Water) Bmued%V-, 1,2,3-TCP(5 PPT&OS CA SRL 524M-TCP x x Hexavalent Chromium EPA 218.7 x x PPT) 1,4-Dioxane EPA 522 x x Hexavalent Chromium SM 3500-Cr B x 2,3,7,8-TCDD Modified EPA 1613B x x Hormones EPA 539 x x Acrylamide In House Method(2440) x x Hydroxide as OH Cale. SM 2330B x x Algal Toxins/Microc stin In House Method(3570) K•eldahl Nitrogen EPA 351.2 x Alkalinity SM 2320B x x x Le ionella Le iolert x x Ammonia EPA 350.1 x x Mercury EPA 245.1 x x x Ammonia SM 4500-NH3 H x x Metals EPA 200.7/200.8 x x x Anions and DBPs by IC EPA 300.0 x x x Microc stin LR ELISA(2360) x x Anions and DBPs by IC EPA 300.1 x x Microc stin,Total EPA 546 x x Asbestos EPA 100.2 x x NDMA EPA 521 x x In house method 2425 BOD/CBOD SM 5210B x x Nitrate/Nitrite Nitrogen EPA 353.2 x x x Bromate In House Method(2447) x x OCL.Pesticides/PCB EPA 505 x x Carbarnates EPA 531.2 x x Ortho Phosphate EPA 365.1 x x x Carbonate as CO3 SM 2330B x x x Ortho Phosphorous SM 4500P E x x Carbonyls EPA 556 x x Oxyhalides Disinfection EPA 317.0 x x By roducts COD EPA 410.4/SM 5220D x Perchlorate EPA 33I.0 x x Chloramines SM 4500-CL G x x x Perchlorate(low and high) EPA 314.0 x x Chlorinated Acids EPA 515.4 x x Perfluorinated Alkyl Acids EPA 537 x x Chlorinated Acids EPA 555 x x Perfluorinated Polutant In house Method(2434) x x Chlorine Dioxide SM 4500-CLO2 D x x pH EPA 150.1 x Palin Test Chlorines SM 4500-Cl G x x x pH SM 4500-H+B x x x Combined-Residual Phen lurea Pesticides/ In House Method,based on EPA Conductivity EPA 120.1 x Herbicides 532(2448) x x Conductivity SM 2510B x x x Pseudomonas IDEXX Pseudalert(2461) x x Cormsivity(Langelier Index) SM 2330B x x Radium-226 GA Institute of Tech x x Cyanide,Amenable SM 4500-CN G x x Radium-228 GA Institute of Tech x x Cyanide,Free SM 450OCN F x x x Radon-222 SM 750ORN x x Cyanide,Total EPA 335.4 x x x Residue,Filterable SM 2540C x x x Cyanogen Chloride In House Method(2470) x x Residue,Non-filterable SM 2540D x screen Di uat and Para uat EPA 549.2 x x Residue,Total SM 2540B x x DBP/HAA SM 6251B x x Residue,Volatile EPA 160.4 x Dissolved Oxygen SM 4500-0 G x x Semi-VOC EPA 525.2 x x DOC SM 5310C x x Silica SM 4500-Si D x x E.Coli (MTF/EC+MUG) x x Silica SM 4500-SiO2 C x x E.Coli CFR 141 21(f)(6)(i) x x Sulfide SM 4500-S-D x E.Coli SM 9223 x Sulfite SM 4500-SO3B x x x E.Coli(Enumeration) SM 9221B.11 SM 9221F x x Surfactants SM 5540C x x x E.Coli(Enumeration) SM 9223B x x Taste and Odor Anal es SM 6040E x x EDB/DCBP EPA 504.1 x Total Coliform(P/A) SM 9221 A,B x x EDB/DBCP and DBP EPA 551.1 x x Total Coliform SM 9221 A,B,C x x Enumeration EDTA and NTA In House Method(2454) x x Total Coliform/E.coli Colisure SM 9223 x x Endothall EPA 548.1 x x Total Coliform SM 9221B x Total Coliform with Endothall In-house Method(2445) x x Chlorine Present SM 9221B x Enterococci SM 9230B x x Total Coliform/E.coli(P/A SM 9223 x x and Enumeration Fecal Coliform SM 9221 E(MTF/EC) x TOC SM 5310C x x x Fecal Coliform SM 9221C,E(MTF/EC) x TOX SM 5320B x Fecal Coliform SM 9221E(MTF/EC) x x Total Phenols EPA 420.1 x (Enumeration) Fecal Coliform with SM 9221 E x Total Phenols EPA 420.4 x x x Chlorine Present Fecal Stre tococci SM 9230B x x Total Phosphorous SM 4500 P E x Fluoride SM 4500-F C x x x Triazine Pesticides& In House(3617) x x De radates Glyphosate EPA 547 x x Turbidity EPA 180.1 x x x GI hosate+AMPA In House Method(3618) x x Turbidity SM 2130B x x Gross Alpha/Beta EPA 900.0 x x x Uranium by ICP/MS EPA 200.8 x x Gross Alpha Coprecipitation SM 7110 C x x x UV 254 SM 5910B x Hardness SM 2340B x x x VOC EPA 524.2 x x Heterotrophic Bacteria In House Method(2439) x x VOC In House Method(2411) x x Heterotro hic Bacteria SM 9215 B x x Yeast and Mold SM 9610 x x Hexavalent Chromium I EPA 218.6 x x x 750 Royal Oaks Dr.,Ste 100,Monrovia,CA 91016Tel(626)386-1100 Fax(626)386-1101 http://www.EatonAnalytical.com& 9-1-0031ssued:09/20/2018 Page 3 of 37 pages CHAIN OF CUSTODY South Tahoe Public Utility District Lab Sent Eurofins Preservatives: Turn-Around-Time: 1275 Meadow Crest Drive 4 C Standard South Lake Tahoe, 62 ho A 96150 �* Sampler(s): B. Chernago VOC -HCI �� M. Lieberman UH� 6� v � A Collection Lab ID# Sample Site Date&Time 1, AG66349 DO-01 Diamond Ditch @ Beginning start of Diamond Ditch;at HPR 0510812019 09:52 Ww X outlet AG66366 BLANK TRIP Ttlp Blank 0510a12019 00:00 X Notes: Relinquished by: - Received by: Report MTBE to 0.2 ug/L Analyze Travel and Field Blanks only if VOCs detected in samples. Signature , U�� Signature Use Calif State WriteOn to report&upload results of Potable Water Wells. Print y e y n'f e Print Company South Tahoe Public UtilityDistrict Company F29? Please Return all STPUD ice chests St Blue Ice Date: D C' ����Time: /U Ca Date: ��(�I( � Time: Comments: Relinquished by: Received by: Signature Signature Print Print Company Company Date: Time: Date: Time: cc Page 1 of 1 CD to N a) of a I` M O to ti,; eurofins INTERNAL CHAIN OF CUSTODY RECORD Eaton Analytical � SAMPLE TEMP RECEIVED: EEA Folder Number: LIN4 Note:If samples are out of temperature range,let the ASMs know.ASMs will determine whether to proceed with analysis or not. SAMPLES REC'D DAY OF COLLECTION? Yes If No IR Gun ID= A (Observation= t - t °C) (Corr.Factor -( °C) (Final= v °C) TYPE OF ICE: Real Synthetic No Ice CONDITION OF ICE: Frozen Partially Frozen Thawed N/A METHOD OF SHIPMENT: Pick-Up / Walk-In / dEx UPS / DHL / Area Fast / Top Line / Other: Compliance Acceptance Criteria: 1) Chemistry: >0,s 6°C,not frozen(NELAP)(if received after 24 hrs of sample collection) 2) Microbiology,Distribution: < 10°C,not frozen(can be z10°C if received on ice the same day as sample collection,within 8 hours) 3) Microbiology, Surface Water: < 10°C(if received after 2 hours of sample collection) II out Of temperature range for both Chemistry and Mlcr0bl0l0gy s8mpleS and temperature does not confirm,then measure the lempeature of each 1•(observation._'C) Car Factor 'C Final=__'C) 2•(oosorvatlon•_'C Carr FrtcWr_'C)(Final quadrant and record each temperature of the quadrants 3•(obemvawn-_'C)(Corr.Fataor_'C)(Final= 'C) 4•(observation-__-_'C)(Con.Few, 'C)(FInN•__—'C) 4 Dioxin(1613 or 2,3,7,8 TCDD): must be between 0-4°C,not frozen(if received after 24 hrs of sample collection) 5) pH Check. Manufacturer: Lot Number: pH strip type: 0- 14 or Expiration Date Results: 6) Chlorine check. Manufacturer:Sansafe. Lot No.: Expiration Date: Results 7) VOA Headspace: No Samples with Headspace: I � Samples with Headspace(see below): l� Headspace Documentation(use additional VOC Internal COFC for additional bottles) Exempt from heads pace concerns: Methods 515.4,HAA(6251,552),505,SPME,CCH,532LCMS,556,536,Antitoxin,LCMS methods using 40 ml vials, International clients: None/<8 None/<6 >6mm Samp ID Battle# Nonerl ,6mm Samp to Bottle# NOS<6 >6mm Samp ID Bottle# >6mm Samp ID Bottle# Note Sample IDs which have dissimilar headspace(i.e. potential sampling errors): SIGNATURE PRINT NAME COMPANYRITLE DATE TIME RECEIVED 6Y � / Z Euroflns Eaton Analytical l / Page_of_ QA FO 00833(QA F041IMS504)(5/23/18)Ver 7 ti®;` eurofins Eaton Analytical Laboratory Comments Tel:(626)386-1100 Report: 804461 Fax:(866)988-3757 Project: SPECIAL 1 800 566 LABS(1 800 566 5227) Group:8260+oygenates South Lake Tahoe Public Utilities District . Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Folder Comments Analytical results for 8260 are submitted by Calscience Environmental Laboratories, Inc. Garden Grove,CA ELAP ID 2944 exp 9-30-2019 The Comments Report may be blank if there are no comments for this report. Page 6 of 37 pages ti®ti eurofins Eaton Analytical Laboratory Data Report: 804461 Tel:(626)386-1100 Project:SPECIAL Fax:(866)988-3757 Group: 8260+oygenates 1 800 566 LABS(1 800 566 5227) Samples Received on: 05/10/2019 1321 South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe,CA 96150 Prepared Analyzed Prep Batch Analyzed Batch Method Analyte Result Units MRL Dilution Diamond Ditch f7 Beginning(201905100148) Sampled on 05/08/2019 0952 Variable ID:AG66349 EPA 8260B-4848_8260 VOC W Super List 05/20/19 05/21/19 01:57 (EPA 82606) 1,1,1,2-Tetrachloroethane ND ug/L 2 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,1,1-Tdchloroethane ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,1,2,2-Tetrachloroethane ND ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,1,2-Tdchloro-1,2,2-trifluoroethane ND ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,1,2-Tdchloroethane ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,1-Dichloroethane ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,1-Dichloroethene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,1-Dichloropropene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,2,3-Tdchlorobenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,2,3-Tdchloropropane ND ug/L 5 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,2,4-Tdchlorobenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,2,4-Trimethylbenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,2-Dibromo-3-chloropropane ND ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,2-Dibromoethane ND ug/L 1 1 O5/20/19 05/21/19 01:57 (EPA 8260B) 1,2-Dichlorobenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,2-Dichloroethane ND ug/L 0.5 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,2-Dichloropropane ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,3,5-Trimethylbenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,3-butadiene ND ug/L 25 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,3-Dichlorobenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,3-Dichloropropane ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,4-Dichlorobenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,4-Dioxane ND ug/L 100 1 05/20/19 05/21/19 01:57 (EPA 82608) 2,2-Dichloropropane ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 2-Butanone ND ug/L 20 1 05/20/19 05/21/19 01:57 (EPA 8260B) 2-Chloroethyl vinyl ether ND ug/L 50 1 05/20/19 05/21/19 01:57 (EPA 8260B) 2-Chlorotoluene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) 2-Hexanone ND ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) 4-chlorotoluene ND ug/L 1 1 Rounding on totals after summation. (c)-indicates calculated results.Analysis is a calculated result.Reported results are not rounded until the final step before reporting.Therefore methods that use a test result with further calculation may have slight differences in final result than the component analyses. Page 7 of 37 pages ti~ eurofins Eaton Analytical Laboratory Data Report: 804461 Tel:(626)386-1100 Project: SPECIAL Fax:(866)988-3757 Group:8260+oygenates 1 800 566 LABS(1 800 566 5227) Samples Received on: 05/10/2019 1321 South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Prepared Analyzed Prep Batch Analyzed Batch Method Analyte Result Units MRL Dilution 05/20/19 05/21/19 01:57 (EPA 8260B) 4-methyl-2-Pentanone ND ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) Acetone ND ug/L 20 1 05/20/19 05/21/19 01:57 (EPA 8260B) Acetonitrile ND ug/L 20 1 05/20/19 05/21/19 01:57 (EPA 8260B) Acrolein ND ug/L 50 1 05/20/19 05/21/19 01:57 (EPA 8260B) Acrylonitrile ND ug/L 20 1 05/20/19 05/21/19 01:57 (EPA 8260B) Benzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Bromobenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Bromochloromethane ND ug/L 2 1 05/20/19 05/21/19 01:57 (EPA 8260B) Bromodichloromethane ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Bromoform ND ug/L 5 1 05/20/19 05/21/19 01:57 (EPA 8260B) Bromomethane ND ug/L 50 1 05/20/19 05/21/19 01:57 (EPA 8260B) c-1,2-Dichloroethene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Carbon disulfide ND ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) Carbon Tetrachloride ND ug/L 0.5 1 05/20/19 05/21/19 01:57 (EPA 8260B) Chlorobenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Chloroethane ND ug/L 5 1 05/20/19 05/21/19 01:57 (EPA 8260B) Chloroform ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Chloromethane ND ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) cis-1,3-Dichloropropene ND ug/L 0.5 1 05/20/19 05/21/19 01:57 (EPA 8260B) Cyclohexane ND ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) Cyclohexanone ND ug/L 50 1 05/20/19 05/21/19 01:57 (EPA 8260B) Dibromochloromethane ND ug/L 2 1 05/20/19 05/21/19 01:57 (EPA 8260B) Dibromomethane ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Dichlorodifluoromethane ND ug/L 5 1 05/20/19 05/21/19 01:57 (EPA 8260B) Diethyl Ether ND ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) Diisopropyl Ether(DIPE) ND ug/L 2 1 05/20/19 05/21/19 01:57 (EPA 8260B) Ethanol ND ug/L 100 1 05/20/19 05/21/19 01:57 (EPA 8260B) Ethylbenzene ND ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Hexachloro-1,3-Butadiene ND ug/L 20 1 05/20/19 05/21/19 01:57 (EPA 8260B) Hexane ND ug/L 5 1 05/20/19 05/21/19 01:57 (EPA 8260B) Iodomethane ND ug/L 50 1 05/20/19 05/21/19 01:57 (EPA 8260B) Isobutyl Alcohol ND ug/L 50 1 05/20/19 05/21/19 01:57 (EPA 8260B) Isopropanol ND ug/L 200 1 Rounding on totals aftersummation. (c)-indicates calculated results Analysis is a calculated result.Reported results are not rounded until the final step before reporting.Therefore methods that use a test result with further calculation may have slight differences in final result than the component analyses. Page 8 of 37 pages eurofins Eaton Analytical Laboratory Data Report: 804461 Tel:(626)386-1100 Project: SPECIAL Fax:(866)988-3757 Group:8260+oygenates 1 800 566 LABS(1 800 566 5227) Samples Received on: 05/10/2019 1321 South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Prepared Analyzed Prep Batch Analyzed Batch Method Analyte Result Units MRL Dilution 05/20/19 05/21/19 01:57 (EPA 8260B) Isopropylbenzene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) m,p-Xylene NO ug/L 2 1 05/20/19 05/21/19 01:57 (EPA 8260B) Methylene chloride NO ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) Methyl-t-Butyl Ether(MTBE) NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) naphthalene NO ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) n-Butylbenzene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) n-Propyl benzene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) o-Xylene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) p-Isopropyltoluene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) sec-Butyl benzene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Styrene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) t-1,2-Dichloroethene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) t-1,3-Dichloropropene NO ug/L 0.5 1 05/20/19 05/21/19 01:57 (EPA 8260B) t-1,4-Dichloro-2-Butene NO ug/L 20 1 05/20/19 05/21/19 01:57 (EPA 8260B) Tert-Butyl Alcohol(TBA) NO ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) tert-Butyl benzene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Tetrachloroethene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Tetrahydrofuran NO ug/L 20 1 05/20/19 05/21/19 01:57 (EPA 8260B) Thiophene NO ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) Toluene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Trichloroethene NO ug/L 1 1 05/20/19 05/21/19 01:57 (EPA 8260B) Trichlorofluoromethane NO ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) Vinyl Acetate NO ug/L 10 1 05/20/19 05/21/19 01:57 (EPA 8260B) Vinyl chloride NO ug/L 0.5 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,2-Dichloroethane-d4 120 % 1 05/20/19 05/21/19 01:57 (EPA 8260B) 1,4-Bromofluorobenzene 88.0 % 1 05/20/19 05/21/19 01:57 (EPA 8260B) Dibromofluoromethane 106 % 1 05/20/19 05/21/19 01:57 (EPA 8260B) Toluene-d8 93.0 % 1 Travel Blank(201905100149) Sampled on 05/08/2019 0000 Variable ID:AG66355 EPA 8260B-4848_8260 VOC W Super List 05/20/19 05/21/19 02:23 (EPA 8260B) 1,1,1,2-Tetrachloroethane NO ug/L 2 1 Rounding on totals after summation. (c)-indicates calculated results.Analysis is a calculated result.Reported results are not rounded until the final step before reporting.Therefore methods that use a test result wgh further calculation may have slight differences in final result than the component analyses. Page 9 of 37 pages ti®ti eurofins Eaton Analytical Laboratory Data Report: 804461 Tel:(626)386-1100 Project:SPECIAL Fax:(866)988-3757 Group:8260+oygenates 1 800 566 LABS(1 800 566 5227) Samples Received on: 05/10/2019 1321 South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Prepared Analyzed Prep Batch Analyzed Batch Method Analyte Result Units MRL Dilution 05/20/19 05/21/19 02:23 (EPA 8260B) 1,1,1-Trichloroethane ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,1,2,2-Tetrachloroethane ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,1,2-Tdchloro-1,2,2-trifluoroethane ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,1,2-Trichloroethane ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,1-Dichloroethane ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,1-Dichloroethene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,1-Dichloropropene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2,3-Trichlorobenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2,3-Tdchloropropane ND ug/L 5 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2,4-Trichlorobenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2,4-Thmethylbenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2-Dibromo-3-chloropropane ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2-Dibromoethane ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2-Dichlorobenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2-Dichloroethane ND ug/L 0.5 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2-Dichloropropane ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,3,5-Tdmethylbenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,3-butadiene ND ug/L 25 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,3-Dichlorobenzene ND ug/L 1 1 0.5/20/19 05/21/19 02:23 (EPA 8260B) 1,3-Dichloropropane ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,4-Dichlorobenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,4-Dioxane ND ug/L 100 1 05/20/19 05/21/19 02:23 (EPA 8260B) 2,2-Dichloropropane ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 2-Butanone ND ug/L 20 1 05/20/19 05/21/19 02:23 (EPA 8260B) 2-Chloroethyl vinyl ether ND ug/L 50 1 05/20/19 05/21/19 02:23 (EPA 8260B) 2-Chlorotoluene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 2-Hexanone ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) 4-chlorotoluene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) 4-methyl-2-Pentanone ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) Acetone ND ug/L 20 1 05/20/19 05/21/19 02:23 (EPA 8260B) Acetonitrile ND ug/L 20 1 05/20/19 05/21/19 02:23 (EPA 8260B) Acrolein ND ug/L 50 1 05/20/19 05/21/19 02:23 (EPA 8260B) Acrylonitrile ND ug/L 20 1 Rounding on totals aftersummation. (c)-indicates calculated results.Analysis is a calculated result.Reported results are not rounded until the final step before reporting.Therefore methods that use a test result with further calculation may have slight differences in final result than the component analyses. Page 10 of 37 pages ti-% eurofins Eaton Analytical Laboratory Data Report: 804461 Tel:(626)386-1100 Project: SPECIAL Fax:(866)988-3757 Group:8260+oygenates 1 800 566 LABS(1 800 566 5227) Samples Received on: 05/10/2019 1321 South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Prepared Analyzed Prep Batch Analyzed Batch Method Analyte Result Units MRL Dilution 05/20/19 05/21/19 02:23 (EPA 8260B) Benzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Bromobenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Bromochloromethane ND ug/L 2 1 05/20/19 05/21/19 02:23 (EPA 8260B) Bromodichloromethane ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Bromoform ND ug/L 5 1 05/20/19 05/21/19 02:23 (EPA 8260B) Bromomethane ND ug/L 50 1 05/20/19 05/21/19 02:23 (EPA 8260B) c-1,2-Dichloroethene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Carbon disulfide ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) Carbon Tetrachloride ND ug/L 0.5 1 05/20/19 05/21/19 02:23 (EPA 8260B) Chlorobenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Chloroethane ND ug/L 5 1 05/20/19 05/21/19 02:23 (EPA 8260B) Chloroform ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Chloromethane ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) cis-1,3-Dichloropropene ND ug/L 0.5 1 05/20/19 05/21/19 02:23 (EPA 8260B) Cyclohexane ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) Cyclohexanone ND ug/L 50 1 05/20/19 05/21/19 02:23 (EPA 8260B) Dibromochloromethane ND ug/L 2 1 05/20/19 05/21/19 02:23 (EPA 8260B) Dibromomethane ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Dichlorodifluoromethane ND ug/L 5 1 05/20/19 05/21/19 02:23 (EPA 8260B) Diethyl Ether ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) Diisopropyl Ether(DIPE) ND ug/L 2 1 05/20/19 05/21/19 02:23 (EPA 8260B) Ethanol ND ug/L 100 1 05/20/19 05/21/19 02:23 (EPA 8260B) Ethylbenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Hexachloro-1,3-Butadiene ND ug/L 20 1 05/20/19 05/21/19 02:23 (EPA 8260B) Hexane ND ug/L 5 1 05/20/19 05/21/19 02:23 (EPA 8260B) lodomethane ND ug/L 50 1 05/20/19 05/21/19 02:23 (EPA 8260B) Isobutyl Alcohol ND ug/L 50 1 05/20/19 05/21/19 02:23 (EPA 8260B) Isopropanol ND ug/L 200 1 05/20/19 05/21/19 02:23 (EPA 8260B) Isopropyl benzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) m,p-Xylene ND ug/L 2 1 05/20/19 05/21/19 02:23 (EPA 8260B) Methylene chloride ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) Methyl-t-Butyl Ether(MTBE) ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) naphthalene ND ug/L 10 1 Rounding on totals after summation. (c)-indicates calculated results.Analysis is a calculated result.Reported results are not rounded until the final step before reporting.Therefore methods that use a test result with further calculation may have slight differences in final result than the component analyses. Page 11 of 37 pages tiati eurofins f Eaton Analytical Laboratory Data Report: 804461 Tel:(626)386-1100 Project:SPECIAL Fax:(866)988-3757 Group:8260+oygenates 1 800 566 LABS(1 800 566 5227) Samples Received on: 05/10/2019 1321 South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Prepared Analyzed Prep Batch Analyzed Batch Method Analyte Result Units MRL Dilution 05/20/19 05/21/19 02:23 (EPA 8260B) n-Butylbenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) n-Propyl benzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) o-Xylene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) p-Isopropyltoluene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 82606) sec-Butylbenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Styrene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) t-1,2-Dichloroethene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) t-1,3-Dichloropropene ND ug/L 0.5 1 05/20/19 05/21/19 02:23 (EPA 8260B) t-1,4-Dichloro-2-Butene ND ug/L 20 1 05/20/19 05/21/19 02:23 (EPA 8260B) Tert-Butyl Alcohol(TBA) ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) tert-Butylbenzene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Tetrachloroethene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Tetrahydrofuran ND ug/L 20 1 05/20/19 05/21/19 02:23 (EPA 8260B) Thiophene ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) Toluene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Trichloroethene ND ug/L 1 1 05/20/19 05/21/19 02:23 (EPA 8260B) Trichlorofluoromethane ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) Vinyl Acetate ND ug/L 10 1 05/20/19 05/21/19 02:23 (EPA 8260B) Vinyl chloride ND ug/L 0.5 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,2-Dichloroethane-d4 120 % 1 05/20/19 05/21/19 02:23 (EPA 8260B) 1,4-Bromofluorobenzene 87.0 % 1 05/20/19 05/21/19 02:23 (EPA 8260B) Dibromofluoromethane 104 % 1 05/20/19 05/21/19 02:23 (EPA 8260B) Toluene-d8 96.0 % 1 Rounding on totals after summation. (c)-indicates calculated results.Analysis is a calculated result.Reported results are not rounded until the final step before reporting.Therefore methods that use a lest result with further calculation may have slight differences In final result than the component analyses. Page 12 of 37 pages tioti eurofins Eaton Analytical Laboratory QC Summary Report: 804461 Tel:(626)386-1100 Project: SPECIAL Fax:(866)988-3757 Group: 8260+oygenates 1 800 566 LABS(1 800 566 5227) South Lake Tahoe Public Utilities District Analytical Batch: Analysis Date: Analyzed by: Page 13 of 37 pages ti®~ eurofins Eaton Analytical Laboratory QC Report: 804461 Tel:(626)386-1100 Project:SPECIAL Fax:(866)988-3757 1 800 566 LABS(1 800 566 5227) Group:8260+oygenates South Lake Tahoe Public Utilities District QC Type Analyte Native Spiked Recovered Units Yield(%) Limits(%) RPDLimit(%) RPD% by Analytical Batch: Analysis Date: Spike recovery is already corrected for native results. Spikes which exceed Limits and Method Blanks with positive results are highlighted by Underlining. criteria for MS and Dup are advisory only,batch control is based on LCS.Criteria for duplicates are advisory only,unless otherwise specified in the method. RPD not calculated for LCS2 when different a concentration than LCS'I is used. RPD not calculated for Duplicates when the result is not five times the MRL(Minimum Reporting Level). (S)-Indicates surrogate compound. (1)-Indicates internal standard compound. Page 14 of 37 pages ORGANIC CHEMICAL ANALYSIS (11/07) Date of Report: 5/24/2019 Sample ID No.: - Laboratory Name: Name of Sampler: Employed by: Date/Time Sample Date/Time Date Analyses Collected: Received @Lab: Completed. System Name: XXXXXXXXXXX System Number:XXXXXXX Variable ID: COC ID: Name or Number of Sample Source: User ID: Station number:XXXXXXX-XXX Date/Time of Sample: Laboratory Code: 191519101 YY MM DD TTTT Date Analyses completed: YY MM DD Submitted by: Eurofins Eaton Analytical, LLC Phone#(626)386-1100 TEST CHEMICAL ENTRY ANALYSES MCL DLR METHOD ALL CHEMICALS EXCEPT 2,3,7,8 TCDD(DIOXIN) # RESULTS ug/L ug/L reported uG/L (I) I-Invalid MRL exceeds DLR Page 1 of 1 Page 15 of 37 pages Page 1 of 22 0% eurofins ti Calscience WORK ORDER NUMBER: 19-05-0925 The difference is service AIR ( SO!! I �,/ATER I MARINE CHEMISTRY Analytical Report For Client: Eurofins Eaton Analytical, Inc Client Project Name: 804461 Attention: Jaclyn Contreras 750 Royal Oaks Drive Suite 100 Monrovia, CA 91016-3629 �m 4 /A Approved for release on 05/21/2019 by: Cecile deGuia ResultLink ► Project Manager Email your PM ► Eurofins Calscience(Calscience)certifies that the test results provided in this report meet all NELAC Institute requirements for parameters for which accreditation is required or available.Any exceptions to NELAC Institute requirements are noted in the case narrative.The original report of subcontracted analyses,if any,is attached to this report.The results in this report are limited to the sample(s)tested and any reproduction thereof must be made in its entirety.The client or recipient of this report is specifically prohibited from making material changes to said report and,to the extent that such changes are made,Calscience is not responsible, legally or otherwise.The client or recipient agrees to indemnify Calscience for any defense to any litigation which may arise. F Lincoln • 1 Page 16 of 37 pages Page 2 of 22 ti•: eurof ins Calscience Contents Client Project Name: 804461 Work Order Number: 19-05-0925 1 Work Order Narrative. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Sample Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Client Sample Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.1 EPA 8260B Volatile Organics (Aqueous). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Quality Control Sample Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.1 LCS/LCSD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5 Sample Analysis Summary. . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . 17 6 Glossary of Terms and Qualifiers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 7 Chain-of-Custody/Sample Receipt Form. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 • FAX:(714)894-7501 Page 17 of 37 pages Page 3 of 22 ti•; e u rof i ns I Work Order Narrative Calscience Work Order: 19-05-0925 Page 1 of 1 Condition Upon Receipt: Samples were received under Chain-of-Custody(COC)on 05/13/19.They were assigned to Work Order 19-05-0925. Unless otherwise noted on the Sample Receiving forms all samples were received in good condition and within the recommended EPA temperature criteria for the methods noted on the COC.The COC and Sample Receiving Documents are integral elements of the analytical report and are presented at the back of the report. Holding Times: All samples were analyzed within prescribed holding times(HT)and/or in accordance with the Calscience Sample Acceptance Policy unless otherwise noted in the analytical report and/or comprehensive case narrative, if required. Any parameter identified in 40CFR Part 136.3 Table II that is designated as"analyze immediately"with a holding time of<= 15 minutes(40CFR-136.3 Table II,footnote 4), is considered a"field"test and the reported results will be qualified as being received outside of the stated holding time unless received at the laboratory within 15 minutes of the collection time. Quality Control: All quality control parameters (QC)were within established control limits except where noted in the QC summary forms or described further within this report. i V Subcontractor Information: o Unless otherwise noted below(or on the subcontract form), no samples were subcontracted. Additional Comments: Air-Sorbent-extracted air methods(EPA TO-4A, EPA TO-10, EPA TO-13A, EPA TO-17):Analytical results are converted from mass/sample basis to mass/volume basis using client-supplied air volumes. Solid- Unless otherwise indicated, solid sample data is reported on a wet weight basis, not corrected for% moisture.All QC results are always reported on a wet weight basis. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 • FAX:(714)894-7501 Page 18 of 37 pages Page 4 of 22 40. eurofins I Sample Summary Calscience Client: Eurofins Eaton Analytical, Inc Work Order: 19-05-0925 750 Royal Oaks Drive, Suite 100 Project Name: 804461 Monrovia, CA 91016-3629 PO Number: 99-66431 Date/Time 05/13/19 10:56 Received: Number of 4 Containers: Attn: Jaclyn Contreras Sample Identification Lab Number Collection Date and Time Number of Matrix Containers 201905100148 19-05-0925-1 05/08/19 09:52 3 Aqueous 201905100149 19-05-0925-2 05/08/19 00:00 1 Aqueous t d `o U 0 K 7440 Lincoln Way,Garden Grove,CA 92841-1427 TEL:(714)895-5494 FAX:(714)894-7501 Page 19 of 37 pages Page 5 of 22 e u rof i n s I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 804461 Page 1 of 9 Client Sample Number Lab Sample Date/Time Matrix Instrument Date Date/Time QC Batch ID Number Collected Prepared Analyzed 20,1905100148 19;05 0925-1-A 05l08119,;, Aqueous ',GC/M§Z 05l20/19; 05l21119 - 190520•L04T 09:52 0157.' Comment(s): Results were evaluated to the MDL(DL),concentrations>=to the MDL(DL)but<RL(LOQ),if found,are qualified with a"J"flag. Parameter Result RL MDL DF Qualifiers Isobutyl Alcohol ND 50 20 1.00 Cyclohexanone ND 50 6.1 1.00 2-Methyl-2-Butanol(TAA) ND 50 15 1.00 Acetone ND 20 10 1.00 Benzene ND 1.0 0.14 1.00 Bromobenzene ND 1.0 0.19 1.00 Bromochloromethane ND 2.0 0.46 1.00 Bromodichloromethane ND 1.0 0.23 1.00 Bromoform ND 5.0 1.8 1.00 Bromomethane ND 50 19 1.00 0 2-Butanone ND 20 6.6 1.00 n-Butylbenzene ND 1.0 0.30 1.00 v sec-Butylbenzene ND 1.0 0.19 1.00 tert-Butylbenzene ND 1.0 0.25 1.00 Diethyl Ether ND 10 0.31 1.00 Carbon Disulfide ND 10 0.70 1.00 Carbon Tetrachloride ND 0.50 0.23 1.00 Chlorobenzene ND 1.0 0.16 1.00 Chloroethane ND 5.0 0.76 1.00 2-Chloroethyl Vinyl Ether ND 50 9.0 1.00 Chloroform ND 1.0 0.18 1.00 Chloromethane ND 10 0.50 1.00 2-Chlorotoluene ND 1.0 0.16 1.00 4-Chlorotoluene ND 1.0 0.18 1.00 Dibromochloromethane ND 2.0 0.46 1.00 1,2-Dibromo-3-Chloropropane ND 10 2.1 1.00 1,2-Dibromoethane ND 1.0 0.27 1.00 Dibromomethane ND 1.0 0.30 1.00 1,2-Dichlorobenzene ND 1.0 0.14 1.00 1,3-Dichlorobenzene ND 1.0 0.19 1.00 1,4-Dichlorobenzene ND 1.0 0.24 1.00 Dichlorodifluoromethane ND 5.0 0.28 1.00 1,1-Dichloroethane ND 1.0 0.28 1.00 1,2-Dichloroethane ND 0.50 0.19 1.00 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit: . 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 20 of 37 pages Page 6 of 22 tioti eurofins I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 804461 Page 2 of 9 Parameter Result RL MDL DF Qualifiers 1,1-Dichloroethene ND 1.0 0.22 1.00 c-1,2-Dichloroethene ND 1.0 0.27 1.00 t-1,2-Dichloroethene ND 1.0 0.40 1.00 Acetonitrile ND 50 1.5 1.00 1,2-Dichloropropane ND 1.0 0.20 1.00 Acrolein ND 50 2.4 1.00 Acrylonitrile ND 20 3.1 1.00 1,3-Dichloropropane ND 1.0 0.14 1.00 2,2-Dichloropropane ND 1.0 0.44 1.00 1,1-Dichloropropene ND 1.0 0.17 1.00 c-1,3-Dichloropropene ND 0.50 0.20 1.00 t-1,3-Dichloropropene ND 0.50 0.23 1.00 Ethylbenzene ND 1.0 0.14 1.00 2-Hexanone ND 10 5.3 1.00 Isopropyl benzene ND 1.0 0.16 1.00 U. p-Isopropyltoluene ND 1.0 0.22 1.00 Methylene Chloride ND 10 4.0 1.00 C� 4-Methyl-2-Pentanone ND 10 0.46 1.00 Naphthalene ND 10 5.1 1.00 n-Propylbenzene ND 1.0 0.18 1.00 Styrene ND 1.0 0.15 1.00 1,1,1,2-Tetrachloroethane ND 2.0 0.43 1.00 1,1,2,2-Tetrachloroethane ND 10 0.17 1.00 Tetrachloroethene ND 1.0 0.24 1.00 Toluene ND 1.0 0.13 1.00 1,2,3-Trichlorobenzene ND 1.0 0.28 1.00 1,2,4-Trichlorobenzene ND 1.0 0.34 1.00 1,1,1-Trichloroethane ND 1.0 0.31 1.00 Hexachloro-1,3-Butadiene ND 20 0.42 1.00 1,1,2-Trichloro-1,2,2-Trifluoroethane ND 10 0.62 1.00 1,1,2-Trichloroethane ND 1.0 0.22 1.00 lodomethane ND 50 19 1.00 Trichloroethene ND 1.0 0.24 1.00 Trichlorofluoromethane ND 10 0.28 1.00 1,2,3-Trichloropropane ND 5.0 0.22 1.00 1,2,4-Trimethylbenzene ND 1.0 0.21 1.00 1,3,5-Trimethylbenzene ND 1.0 0.17 1.00 Vinyl Acetate ND 10 2.9 1.00 Vinyl Chloride ND 0.50 0.16 1.00 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 21 of 37 pages Page 7 of 22 4' eurofins I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 804461 Page 3 of 9 Parameter Result RL MDL DF Qualifiers p/m-Xylene ND 2.0 0.31 1.00 o-Xylene ND 1.0 0.15 1.00 Methyl-t-Butyl Ether(MTBE) ND 1.0 0.16 1.00 t-1,4-Dichloro-2-Butene ND 20 2.6 1.00 Tetrahydrofuran ND 20 3.3 1.00 Tert-Butyl Alcohol(TBA) ND 10 3.1 1.00 Diisopropyl Ether(DIPE) ND 2.0 0.16 1.00 Ethyl-t-Butyl Ether(ETBE) ND 2.0 0.12 1.00 Tert-Amyl-Methyl Ether(TAME) ND 2.0 0.13 1.00 Ethanol ND 100 53 1.00 Cyclohexane ND 10 3.3 1.00 Thiophene ND 10 0.16 1.00 1,4-Dioxane ND 100 26 1.00 Hexane ND 5.0 0.95 1.00 - 1,3-Butadiene ND 25 0.95 1.00 O Isopropanol ND 200 100 1.00 2,2,4-Trimethyl Pentane ND 10 0.82 1.00 Surrooate Rec. % Control Limits Qualifiers 1,4-Bromofluorobenzene 88 77-120 Dibromofluoromethane 106 80-128 1,2-Dichloroethane-d4 120 80-129 Toluene-d8 93 80-120 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 • FAX:(714)894-7501 Page 22 of 37 pages Page 8 of 22 % eurofins I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 804461 Page 4 of 9 Client Sample Number Lab Sample Date/Time Matrix Instrument Date Date/Time QC Batch ID Number Collected Prepared Analyzed 201905100149 19=05,0925,2-°A 05/08/19*,a Aqueous.„ GCIMS Z - 05120/19,- .'r `05121/19 - :190520L041 Z00:00 02 23' Comment(s): -Results were evaluated to the MDL(DL),concentrations>=to the MDL(DL)but<.RL(LOQ),if found,are qualified with a"J"flag. Parameter Result RL MDL DF Qualifiers Isobutyl Alcohol ND 50 20 1.00 Cyclohexanone ND 50 6.1 1.00 2-Methyl-2-Butanol(TAA) ND 50 15 1.00 Acetone ND 20 10 1.00 Benzene ND 1.0 0.14 1.00 Bromobenzene ND 1.0 0.19 1.00 Bromochloromethane ND 2.0 0.46 1.00 Bromodichloromethane ND 1.0 0.23 1.00 Bromoform ND 5.0 1.8 1.00 Bromomethane ND 50 19 1.00 0 2-Butanone ND 20 6.6 1.00 0 n-Butylbenzene ND 1.0 0.30 1.00 sec-Butylbenzene ND 1.0 0.19 1.00 tert-Butylbenzene ND 1.0 0.25 1.00 Diethyl Ether ND 10 0.31 1.00 Carbon Disulfide ND 10 0.70 1.00 Carbon Tetrachloride ND 0.50 0.23 1.00 Chlorobenzene ND 1.0 0.16 1.00 Chloroethane ND 5.0 0.76 1.00 2-Chloroethyl Vinyl Ether ND 50 9.0 1.00 Chloroform ND 1.0 0.18 1.00 Chloromethane ND 10 0.50 1.00 2-Chlorotoluene ND 1.0 0.16 1.00 4-Chlorotoluene ND 1.0 0.18 1.00 Dibromochloromethane ND 2.0 0.46 1.00 1,2-Dibromo-3-Chloropropane ND 10 2.1 1.00 1,2-Dibromoethane ND 1.0 0.27 1.00 Dibromomethane ND 1.0 0.30 1.00 1,2-Dichlorobenzene ND 1.0 0.14 1.00 1,3-Dichlorobenzene ND 1.0 0.19 1.00 1,4-Dichlorobenzene ND 1.0 0.24 1.00 Dichlorodifluoromethane ND 5.0 0.28 1.00 1,1-Dichloroethane ND 1.0 0.28 1.00 1,2-Dichloroethane ND 0.50 0.19 1.00 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 23 of 37 pages Page 9 of 22 e u rof ins I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260E Units: ug/L Project: 804461 Page 5 of 9 Parameter Result RL MDL DF Qualifiers 1,1-Dichloroethene ND 1.0 0.22 1.00 c-1,2-Dichloroethene ND 1.0 0.27 1.00 t-1,2-Dichloroethene ND 1.0 0.40 1.00 Acetonitrile ND 50 1.5 1.00 1,2-Dichloropropane ND 1.0 0.20 1.00 Acrolein ND 50 2.4 1.00 Acrylonitrile ND 20 3.1 1.00 1,3-Dichloropropane ND 1.0 0.14 1.00 2,2-Dichloropropane ND 1.0 0.44 1.00 1,1-Dichloropropene ND 1.0 0.17 1.00 c-1,3-Dichloropropene ND 0.50 0.20 1.00 t-1,3-Dichloropropene ND 0.50 0.23 1.00 Ethylbenzene ND 1.0 0.14 1.00 2-Hexanone ND 10 5.3 1.00 Isopropyl benzene ND 1.0 0.16 1.00 0 p-Isopropyltoluene ND 1.0 0.22 1.00 Methylene Chloride ND 10 4.0 1.00 4-Methyl-2-Pentanone ND 10 0.46 1.00 Naphthalene ND 10 5.1 1.00 n-Propylbenzene ND 1.0 0.18 1.00 Styrene ND 1.0 0.15 1.00 1,1,1,2-Tetrachloroethane ND 2.0 0.43 1.00 1,1,2,2-Tetrachloroethane ND 10 0.17 1.00 Tetrachloroethene ND 1.0 0.24 1.00 Toluene ND 1.0 0.13 1.00 1,2,3-Trichlorobenzene ND 1.0 0.28 1.00 1,2,4-Trichlorobenzene ND 1.0 0.34 1.00 1,1,1-Trichloroethane ND 1.0 0.31 1.00 Hexachloro-1,3-Butadiene ND 20 0.42 1.00 1,1,2-Trichloro-1,2,2-Tricuoroethane ND 10 0.62 1.00 1,1,2-Trichloroethane ND 1.0 0.22 1.00 lodomethane ND 50 19 1.00 Trichloroethene ND 1.0 0.24 1.00 Trichlorofluoromethane ND 10 0.28 1.00 1,2,3-Trichloropropane ND 5.0 0.22 1.00 1,2,4-Trimethylbenzene ND 1.0 0.21 1.00 1,3,5-Trimethylbenzene ND 1.0 0.17 1.00 Vinyl Acetate ND 10 2.9 1.00 Vinyl Chloride ND 0.50 0.16 1.00 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 24 of 37 pages Page 10 of 22 ti} eurofins I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 804461 Page 6 of 9 Parameter Result RL MDL DF Qualifiers p/m-Xylene ND 2.0 0.31 1.00 o-Xylene ND 1.0 0.15 1.00 Methyl-t-Butyl Ether(MTBE) ND 1.0 0.16 1.00 t-1,4-Dichloro-2-Butene ND 20 2.6 1.00 Tetrahydrofuran ND 20 3.3 1.00 Tert-Butyl Alcohol(TBA) ND 10 3.1 1.00 Diisopropyl Ether(DIPE) ND 2.0 0.16 1.00 Ethyl-t-Butyl Ether(ETBE) ND 2.0 0.12 1.00 Tert-Amyl-Methyl Ether(TAME) ND 2.0 0.13 1.00 Ethanol ND 100 53 1.00 Cyclohexane ND 10 3.3 1.00 Thiophene ND 10 0.16 1.00 1,4-Dioxane ND 100 26 1.00 Hexane ND 5.0 0.95 1.00 s 1,3-Butadiene ND 25 0.95 1.00 U O Isopropanol ND 200 100 1.00 2,2,4-Trimethyl Pentane ND 10 0.82 1.00 Surrogate Rec. % Control Limits Qualifiers 1,4-Bromofluorobenzene 87 77-120 Dibromofluoromethane 104 80-128 1,2-Dichloroethane-d4 120 80-129 Toluene-d8 96 80-120 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 • FAX:(714)894-7501 Page 25 of 37 pages Page 11 of 22 ti•; eurofins Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 804461 Page 7 of 9 Client Sample Number Lab Sample DatefTime Matrix Instrument Date Date/Time QC Batch ID Number Collected Prepared Analyzed Method Blank 099-14 001-28827, N/A Aqueous GCIMS Z - 05/20119 - 05120%19 _'; 190620L041 Comment(s): Results were evaluated to the MDL(DL),concentrations>=to the MDL(DL)but<RL(LOQ),if found,are qualified with a"J"flag. Parameter Result RL MDL DF Qualifiers Isobutyl Alcohol ND 50 20 1.00 Cyclohexanone ND 50 6.1 1.00 2-Methyl-2-Butanol(TAA) ND 50 15 1.00 Acetone ND 20 10 1.00 Benzene ND 1.0 0.14 1.00 Bromobenzene ND 1.0 0.19 1.00 Bromochloromethane ND 2.0 0.46 1.00 Bromodichloromethane ND 1.0 0.23 1.00 Bromoform ND 5.0 1.8 1.00 Bromomethane ND 50 19 1.00 0 2-Butanone ND 20 6.6 1.00 0 n-Butylbenzene ND 1.0 0.30 1.00 sec-Butylbenzene ND 1.0 0.19 1.00 tert-Butyl benzene ND 1.0 0.25 1.00 Diethyl Ether ND 10 0.31 1.00 Carbon Disulfide ND 10 0.70 1.00 Carbon Tetrachloride ND 0.50 0.23 1.00 Chlorobenzene ND 1.0 0.16 1.00 Chloroethane ND 5.0 0.76 1.00 2-Chloroethyl Vinyl Ether ND 50 9.0 1.00 Chloroform ND 1.0 0.18 1.00 Chloromethane ND 10 0.50 1.00 2-Chlorotoluene ND 1.0 0.16 1.00 4-Chlorotoluene ND 1.0 0.18 1.00 Dibromochloromethane ND 2.0 0.46 1.00 1,2-Dibromo-3-Chloropropane ND 10 2.1 1.00 1,2-Dibromoethane ND 1.0 0.27 1.00 Dibromomethane ND 1.0 0.30 1.00 1,2-Dichlorobenzene ND 1.0 0.14 1.00 1,3-Dichlorobenzene ND 1.0 0.19 1.00 1,4-Dichlorobenzene ND 1.0 0.24 1.00 Dichlorodifluoromethane ND 5.0 0.28 1.00 1,1-Dichloroethane ND 1.0 0.28 1.00 1,2-Dichloroethane ND 0.50 0.19 1.00 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 26 of 37 pages Page 12 of 22 tip; eurofins I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 804461 Page 8 of 9 Parameter Result RL MDL DF Qualifiers 1,1-Dichloroethene ND 1.0 0.22 1.00 c-1,2-Dichloroethene ND 1.0 0.27 1.00 t-1,2-Dichloroethene ND 1.0 0.40 1.00 Acetonitrile ND 50 1.5 1.00 1,2-Dichloropropane ND 1.0 0.20 1.00 Acrolein ND 50 2.4 1.00 Acrylonitrile ND 20 3.1 1.00 1,3-Dichloropropane ND 1.0 0.14 1.00 2,2-Dichloropropane ND 1.0 0.44 1.00 1,1-Dichloropropene ND 1.0 0.17 1.00 c-1,3-Dichloropropene ND 0.50 0.20 1.00 t-1,3-Dichloropropene ND 0.50 0.23 1.00 Ethylbenzene ND 1.0 0.14 1.00 2-Hexanone ND 10 5.3 1.00 Isopropylbenzene ND 1.0 0.16 1.00 p-Isopropyltoluene ND 1.0 0.22 1.00 - Methylene Chloride ND 10 4.0 1.00 4-Methyl-2-Pentanone ND 10 0.46 1.00 Naphthalene ND 10 5.1 1.00 n-Propylbenzene ND 1.0 0.18 1.00 Styrene ND 1.0 0.15 1.00 1,1,1,2-Tetrachloroethane ND 2.0 0.43 1.00 1,1,2,2-Tetrachloroethane ND 10 0.17 1.00 Tetrachloroethene ND 1.0 0.24 1.00 Toluene ND 1.0 0.13 1.00 1,2,3-Trichlorobenzene ND 1.0 0.28 1.00 1,2,4-Trichlorobenzene ND 1.0 0.34 1.00 1,1,1-Trichloroethane ND 1.0 0.31 1.00 Hexachloro-1,3-Butadiene ND 20 0.42 1.00 1,1,2-Trichloro-1,2,2-Trifluoroethane ND 10 0.62 1.00 1,1,2-Trichloroethane ND 1.0 0.22 1.00 lodomethane ND 50 19 1.00 Trichloroethene ND 1.0 0.24 1.00 Trichlorofluoromethane ND 10 0.28 1.00 1,2,3-Trichloropropane ND 5.0 0.22 1.00 1,2,4-Trimethylbenzene ND 1.0 0.21 1.00 1,3,5-Trimethylbenzene ND 1.0 0.17 1.00 Vinyl Acetate ND 10 2.9 1.00 Vinyl Chloride ND 0.50 0.16 1.00 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 27 of 37 pages Page 13 of 22 j e u rof i ns I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 804461 Page 9 of 9 Parameter Result RL MDL DF Qualifiers p/m-Xylene ND 2.0 0.31 1.00 o-Xylene ND 1.0 0.15 1.00 Methyl-t-Butyl Ether(MTBE) ND 1.0 0.16 1.00 t-1,4-Dichloro-2-Butene ND 20 2.6 1.00 Tetrahydrofuran ND 20 3.3 1.00 Tert-Butyl Alcohol(TBA) ND 10 3.1 1.00 Diisopropyl Ether(DIPE) ND 2.0 0.16 1.00 Ethyl-t-Butyl Ether(ETBE) ND 2.0 0.12 1.00 Tert-Amyl-Methyl Ether(TAME) ND 2.0 0.13 1.00 Ethanol ND 100 53 1.00 Cyclohexane ND 10 3.3 1.00 Thiophene ND 10 0.16 1.00 1,4-Dioxane ND 100 26 1.00 Hexane ND 5.0 0.95 1.00 y 1,3-Butadiene ND 25 0.95 1.00 0 Isopropanol ND 200 100 1.00 2,2,4-Trimethyl Pentane ND 10 0.82 1.00 Surrooate Rec. °° Control Limits Qualifiers 1,4-Bromofluorobenzene 85 77-120 Dibromofluoromethane 99 80-128 1,2-Dichloroethane-d4 102 80-129 Toluene-d8 92 80-120 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 • FAX:(714)894-7501 Page 28 of 37 pages Page 14 of 22 ti• eurofins I Quality Control - LCS/LCSD Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Project: 804461 Page 1 of 3 Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed LCS/LCSD Batch Number 099-14-001-28827 LCS Aqueous GUMS Z : , .' 05120/19 -05/20119-22.03;190520L041:_ " 099-14-001 1.-28827 LCSD Aqueous' t . GCIMS Z 05%20119 05120119 22 29 190920L041 Parameter Soike LCS Conc. LCS LCSD LCSD %Rec.CL ME CL RPD RPD CL Qualifiers Added °oRec. Conc. Cyclohexanone 250.0 272.4 109 282.0 113 50-150 33-167 3 0-30 2-Methyl-2-Butanol(TAA) 250.0 251.3 101 251.1 100 50-150 33-167 0 0-21 Acetone 50.00 56.45 113 55.79 112 53-137 39-151 1 0-21 Benzene 50.00 50.93 102 50.12 100 79-121 72-128 2 0-20 Bromobenzene 50.00 47.24 94 47.14 94 80-120 73-127 0 0-20 Bromochloromethane 50.00 56.64 113 54.52 109 80-122 73-129 4 0-20 Bromodichloromethane 50.00 45.10 90 44.29 89 80-124 73-131 2 0-20 Bromoform 50.00 51.51 103 53.27 107 73-127 64-136 3 0-20 Bromomethane 50.00 28.37 57 26.36 53 50-150 33-167 7 0-26 2-Butanone 50.00 57.01 114 56.21 112 60-126 49-137 1 0-20 n-Butylbenzene 50.00 55.93 112 57.50 115 72-138 61-149 3 0-20 d sec-Butylbenzene 50.00 56.49 113 58.21 116 77-131 68-140 3 0-20 tert-Butylbenzene 50.00 54.35 109 55.89 112 80-125 72-132 3 0-20 Diethyl Ether 50.00 55.93 112 55.36 111 71-125 62-134 1 0-22 Carbon Disulfide 50.00 56.38 113 54.60 109 50-150 33-167 3 0-22 Carbon Tetrachloride 50.00 45.70 91 44.12 88 65-143 52-156 4 0-20 Chlorobenzene 50.00 47.00 94 47.44 95 80-120 73-127 1 0-20 Chloroethane 50.00 46.87 94 48.54 97 62-128 51-139 4 0-20 Chloroform 50.00 48.84 98 47.49 95 80-120 73-127 3 0-20 Chloromethane 50.00 41.63 83 42.99 86 43-133 28-148 3 0-20 2-Chlorotoluene 50.00 47.37 95 47.64 95 80-121 73-128 1 0-20 4-Chlorotoluene 50.00 52.00 104 53.95 108 80-120 73-127 4 0-20 Dibromochloromethane 50.00 49.88 100 49.92 100 80-123 73-130 0 0-20 1,2-Dibromo-3-Chloropropane 50.00 50.14 100 51.79 104 66-126 56-136 3 0-20 1,2-Dibromoethane 50.00 52.22 104 52.63 105 80-120 73-127 1 0-20 Dibromomethane 50.00 50.69 101 48.53 97 80-120 73-127 4 0-20 1,2-Dichlorobenzene 50.00 51.67 103 53.75 107 80-120 73-127 4 0-20 1,3-Dichlorobenzene 50.00 52.72 105 54.70 109 80-120 73-127 4 0-20 1,4-Dichlorobenzene 50.00 50.23 100 51.91 104 80-120 73-127 3 0-20 Dichlorodifluoromethane 50.00 52.81 106 52.95 106 50-150 33-167 0 0-30 1,1-Dichloroethane 50.00 52.74 105 51.84 104 72-126 63-135 2 0-20 1,2-Dichloroethane 50.00 44.48 89 43.19 86 76-120 69-127 3 0-20 1,1-Dichloroethene 50.00 53.80 108 52.36 105 66-132 55-143 3 0-20 c-1,2-Dichloroethene 50.00 59.98 120 58.88 118 78-120 71-127 2 0-20 t-1,2-Dichloroethene 50.00 57.33 115 55.76 112 66-132 55-143 3 0-20 1,2-Dichloropropane 50.00 49.15 98 48.55 97 80-120 73-127 1 0-20 RPD:Relative Percent Difference. CL:Control Limits 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 29 of 37 pages Page 15 of 22 ti® eurofins I Quality Control - LCS/LCSD Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260E Project: 804461 Page 2 of 3 Parameter aa& LCS Conc. LCS LCSD LCSD %Rec.CL ME CL RPD RPD CL Qualifiers Added %Rec: Conc. %Rec. 1,3-Dichloropropane 50.00 49.09 98 49.08 98 80-120 73-127 0 0-20 2,2-Dichloropropane 50.00 50.28 101 48.01 96 50-150 33-167 5 0-20 1,1-Dichloropropene 50.00 52.91 106 51.48 103 75-123 67-131 3 0-20 c-1,3-Dichloropropene 50.00 53.72 107 52.10 104 77-131 68-140 3 0-20 t-1,3-Dichloropropene 50.00 54.14 108 52.87 106 76-136 66-146 2 0-20 Ethylbenzene 50.00 49.86 100 49.67 99 80-120 73-127 0 0-20 2-Hexanone 50.00 53.69 107 53.38 107 63-123 53-133 1 0-20 Isopropylbenzene 50.00 51.40 103 51.12 102 80-128 72-136 1 0-20 p-Isopropyltoluene 50.00 50.98 102 52.89 106 73-133 63-143 4 0-20 Methylene Chloride 50.00 52.47 105 51.52 103 61-133 49-145 2 0-27 4-Methyl-2-Pentanone 50.00 50.09 100 50.57 101 65-125 55-135 1 0-20 Naphthalene 50.00 57.29 115 58.44 117 69-129 59-139 2 0-20 n-Propylbenzene 50.00 49.39 99 48.49 97 80-128 72-136 2 0-20 Styrene 50.00 50.98 102 51.30 103 80-126 72-134 1 0-20 1,1,1,2-Tetrachloroethane 50.00 46.55 93 47.20 94 80-129 72-137 1 0-20 0 U 1,1,2,2-Tetrachloroethane 50.00 49.76 100 51.60 103 74-122 66-130 4 0-20 Tetrachloroethene 50.00 48.46 97 48.41 97 55-139 41-153 0 0-23 Toluene 50.00 49.04 98 48.14 96 80-120 73-127 2 0-20 1,2,3-Trichlorobenzene 50.00 51.87 104 52.79 106 72-132 62-142 2 0-20 1,2,4-Trichlorobenzene 50.00 53.15 106 54.73 109 74-134 64-144 3 0-20 1,1,1-Trichloroethane 50.00 47.94 96 46.78 94 76-124 68-132 2 0-20 1,1,2-Trichloro-1,2,2- 50.00 56.57 113 54.39 109 54-150 38-166 4 0-30 Trifluoroethane 1,1,2-Trichloroethane 50.00 47.13 94 47.73 95 80-120 73-127 1 0-20 Trichloroethene 50.00 46.38 93 45.99 92 79-121 72-128 1 0-20 Trichlorofluoromethane 50.00 45.49 91 45.46 91 72-132 62-142 0 0-20 1,2,3-Trichloropropane 50.00 43.51 87 43.44 87 75-123 67-131 0 0-20 1,2,4-Trimethylbenzene 50.00 56.39 113 58.10 116 74-128 65-137 3 0-20 1,3,5-Trimethylbenzene 50.00 50.11 100 49.82 100 77-131 68-140 1 0-20 Vinyl Acetate 50.00 63.00 126 60.63 121 50-150 33-167 4 0-20 Vinyl Chloride 50.00 50.12 100 50.65 101 63-129 52-140 1 0-20 p/m-Xylene 100.0 98.83 99 98.55 99 80-122 73-129 0 0-20 o-Xylene 50.00 49.55 99 49.21 98 80-128 72-136 1 0-20 Methyl-t-Butyl Ether(MTBE) 50.00 51.21 102 50.59 101 69-123 60-132 1 0-20 Tert-Butyl Alcohol(TBA) 250.0 266.7 107 261.5 105 80-124 73-131 2 0-20 Diisopropyl Ether(DIPE) 50.00 56.56 113 55.98 112 79-121 72-128 1 0-20 Ethyl-t-Butyl Ether(ETBE) 50.00 52.55 105 52.60 105 71-125 62-134 0 0-20 Tert-Amyl-Methyl Ether(TAME) 50.00 47.12 94 46.61 93 70-124 61-133 1 0-20 Ethanol 500.0 562.0 112 584.7 117 53-149 37-165 4 0-24 1,4-Dioxane 500.0 539.2 108 521.5 104 . 80-150 68-162 3 0-20 RPD:Relative Percent Difference. CL:Control Limits 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 30 of 37 pages Page 16 of 22 ti•; eurof ins I Quality Control - LCS/LCSD Calscience Eurofins Eaton Analytical, Inc Date Received: 05/13/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-05-0925 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Project: 804461 Page 3 of 3 Total number of LCS compounds:75 Total number of ME compounds:0 Total number of ME compounds allowed:4 LCS ME CL validation result:Pass 0 U 0 m K RPD:Relative Percent Difference. CL:Control Limits 7440 Lincoln Way,Garden Grove,CA 92841-1427 TEL:(714)895-5494 FAX:(714)894-7501 Page 31 of 37 pages Page 17 of 22 ti•} eurofins Sample Analysis Summary Report Calscience Work Order: 19-05-0925 Page 1 of 1 Method Extraction Chemist ID Instrument Analytical Location EPA 8260B EPA 5030C 1178 GC/MS Z 2 v 0 U 0 K Location 2:7445 Lampson Avenue,Garden Grove,CA 92841 7440 Lincoln Way,Garden Grove,CA 92841-1427 TEL:(714)895-5494 FAX:(714)894-7501 Page 32 of 37 pages Page 18 of 22 eurofins I Glossary of Terms and Qualifiers Calscience Work Order: 19-05-0925 Page 1 of 1 Qualifiers Definition See applicable analysis comment. < Less than the indicated value. > Greater than the indicated value. 1 Surrogate compound recovery was out of control due to a required sample dilution. Therefore,the sample data was reported without further clarification. 2 Surrogate compound recovery was out of control due to matrix interference. The associated method blank surrogate spike compound was in control and,therefore,the sample data was reported without further clarification. 3 Recovery of the Matrix Spike(MS)or Matrix Spike Duplicate(MSD)compound was out of control due to suspected matrix interference.The associated LCS recovery was in control. 4 The MS/MSD RPD was out of control due to suspected matrix interference. 5 The PDS/PDSD or PES/PESD associated with this batch of samples was out of control due to suspected matrix interference. 6 Surrogate recovery below the acceptance limit. 7 Surrogate recovery above the acceptance limit. B Analyte was present in the associated method blank. BU Sample analyzed after holding time expired. BV Sample received after holding time expired. Cl See case narrative. E Concentration exceeds the calibration range. ET Sample was extracted past end of recommended max.holding time. HD The chromatographic pattern was inconsistent with the profile of the reference fuel standard. HDH The sample chromatographic pattern for TPH matches the chromatographic pattern of the specified standard but heavier hydrocarbons were also present(or detected). HDL The sample chromatographic pattern for TPH matches the chromatographic pattern of the specified standard but lighter hydrocarbons were also present(or detected). J Analyte was detected at a concentration below the reporting limit and above the laboratory method detection limit. Reported value is estimated. JA Analyte positively identified but quantitation is an estimate. ME LCS Recovery Percentage is within Marginal Exceedance(ME)Control Limit range(+/-4 SD from the mean). ND Parameter not detected at the indicated reporting limit. Q Spike recovery and RPD control limits do not apply resulting from the parameter concentration in the sample exceeding the spike concentration by a factor of four or greater. SG The sample extract was subjected to Silica Gel treatment prior to analysis. X %Recovery and/or RPD out-of-range. Z Analyte presence was not confirmed by second column or GC/MS analysis. Solid-Unless otherwise indicated,solid sample data is reported on a wet weight basis,not corrected for%moisture.All QC results are reported on a wet weight basis. Any parameter identified in 40CFR Part 136.3 Table II that is designated as"analyze immediately"with a holding time of<=15 minutes (40CFR-136.3 Table II,footnote 4),is considered a"field"test and the reported results will be qualified as being received outside of the stated holding time unless received at the laboratory within 15 minutes of the collection time. A calculated total result(Example:Total Pesticides)is the summation of each component concentration and/or,if"J"flags are reported, estimated concentration. Component concentrations showing not detected(ND)are summed into the calculated total result as zero concentrations. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 • FAX:(714)894-7501 Page 33 of 37 pages Page 19 of 22 Cecile L de Guia From: Monica Van Natta Sent: Tuesday, May 14, 2019 12:42 PM To: Jaclyn Contreras Cc: Cecile L de Guia Subject: RE:804461; 19-05-0925 We need @82608_super_Calscience. Monica Van Natta Analytical Services Manager Phone: +1 559 326 4396 Email: MonicaVanNatta(o)EurofinsUS.com www.EurofinsUS.com/Eaton From: Jaclyn Contreras Sent:Tuesday, May 14, 2019 7:19 AM To: Monica Van Natta Cc: Cecile L de Guia Subject: FW: 804461; 19-05-0925 Importance: High 0 Monica, Please confirm the test list needed for the above order. Do we only need the BTEX list of the standard 8260 list.thanks Jackie Contreras From: Cecile L de Guia Sent: Monday, May 13, 2019 7:03 PM To: Jaclyn Contreras Subject: 804461; 19-05-0925 Importance: High Good evening, Please confirm if the compounds to be reported for EPA 8260B are just BTEX only?Otherwise, provide the list of compounds. Thank you. Best regards, Cecile de Guia Project Manager Eurofins Calscience, LLC 7440 Lincoln Way Garden Grove, CA 92841 USA Phone: +1 714 895 5494 Email: cecileldeguia(c)eurofinsUS.com Website:www.eurofinsUS.com/Calscience 1 Page 34 of 37 pages .ti Submittal Form Date: 5/14/2019 ti®ti e u rof i n s "REPORTING REQUIRMENTS:Do Not Combine Reports with any other samples submitted under different Folder Numbersl Eaton Analytical Report&Invoice must have the Folder# 804461 Job#1000014 Report all quality control data according to Method.Include dates analyzed. Date extracted(if extracted)and Method reference on the report. Results must have Complete data 8 QC with Approval Signature. Ship TO: Provide in each Report the Specified State Reports: Jackie Contreras Sub-Contracting Administrator EUfOfIf1S CaI$ClenCe Certification # &'Exp.Date for requested tests'+ 7440 Lincoln Way EMAIL TO:us20—subcontract@6urofinsus.com -.. matrix. Eurofins Eaton Analytical,LLC 750 Royal Oaks Drive,Suite 100,Monrovia,CA 91016 _ Samples from:CALIFORNIA Garden Grove, CA 92641-1432 Phone(626)386-1166 Fax(626)386=1122 ' Invoices to:Eurofins Eaton Analytical,LLC . Phone:714-895-5494 Fax:714-894-7501 Folder M Report Due: Sub COC#: 804461 06/03/2019 99-66484 Mv-j Sample JLS o� m �:� Client Sample ID for reference only Analysis Requested Date & Time Matrix PWS Systemcode PWSID 201905100148 Diamond Ditch @ Beginning 05/08/19 0952 DW IF Sample type: Sample Event: Facility ID: Sample Point ID:{CL_SAMPLEPOINTID) Static ID: EPA 8260B @8260B_Super_Cals 4848_8260 VOC W Super List cience U 201905100149 Travel Blank 05/08/19 0000 DW Sample type: Sample Event: Facility ID: Sample Point ID:{CL_SAMPLEPOINTID) Static ID: EPA 8260E @8260B_Super_Cals 4848_8260 VOC W Super List cience Relingtaished b__y: Sample Control Date Time NOTIFICATION REQUIRED IF RECEIVED OUTSIDE OF 0-6 CELSIUS Received by; Date Time An Acknowledgement of Receipt is.reguested to attnyJacke Contreras ---— - CD Relinquished by: o Sample Control Date Time -- -- c, Received by:; Date Time ti o Page 1 of 1 m cn 750 Royal Oaks Drive,Suite 100, Monrovia, CA 91016 Tel(626)386-1100 Fax(866)988-3757 www.EurofinsUS.com/Eaton cD w Submittal Form Date: 5/13/2019 �,•ti e u rof i n s *REPORTING REQUIRMENTS:Do Not Combine Reports with any other samples submitted under different Folder Numbersl Eaton Analytical Report&Invoice must have the Folder# 804461 Job#1000014 Report all ouality control data according to Method.Include dates analyzed. Date extracted(if extracted)and Method reference on the report. Results must have Complete data&QC with Approval Signature. Ship To: 'Eurofins CalSclencet:i: w.. .•. ,',. t !�, I� .:t !�.z �' ;; f i 'y . 7440 Lincoln Way Yiar o. a�`R,.'u�;.I ,�:5':,.' I�x� Garden Grove, CA 92641-1432 .«. s=�� t, •��7`. t�l,, w ,t�: ', ;Ihtt�+ ,r t�t".4��`�," �.ia ��.���� t•:� ti�k�t:a����e�::>��fu„. ?«;,•.. 1'. ?ag ;t %=,,'rsa' a.; x.• '- d.� Phone:714-895-5494 Fax:714-894-7501 quote 966334 19-05-0925 Folder M Report Due: Sub COCM 804461 06/03/2019 99-66431 I Sample JLS 'emrWailugfilm Client Sample ID forreference only Analysis Requested Date & Time Matrix PWS Systemcode PWSID i 201905100148 Diamond Ditch @ Beginning 05/08/19 0952 DW Sample type: Sample Event: Facility ID: Sample Point ID:{CL_SAMPLEPOINTID) Static ID: EPA 8260 @826OBTEX((Z� VOCs by EPA 8260b-BTEX List 201905100149--erravel Blank 06/00/19 0000 DW Sample type: Sample Event: Facility ID: Sample Point ID:(CL_SAMPLEPOINTID) Static ID: EPA 8260 @8260BTXM VOCs by EPA 8260b-BTXM List Sample Co Date Tlme�/f]j NOTIFICATION REQUIRED IF RECEIVED OUTSIDE OF 0-6 CELSIUS m W f Date Timeii .aI�: I � "II �.�I� ,: Kf ► tr :... ttj;, :.... o - a ontrol Date'� Time l N N , i5 0 Date /3 t Time 10S Page 1 of 1 CD in 750 Royal Oaks Drive,Suite 100,Monrovia,CA 91016RTel,(826),38 Fax(866)988-3757 www.EurofinsUS.comlEaton tig1 e u rof i n s i WORK ORDER NUMBER: Calscience SAMPLE RECEIPT CHECKLIST COOLER OF CLIENT: EF- Ahal C.-RI DATE: 05 /i3 12019 TEMPERATURE: (Criteria:0.0°C—6.0°C, not frozen except sediment/tissue) Thermometer ID:SC6(CF:-0.20C);Temperature(w/o CF): a q - I °C(w/CF): o7- 7 °C; ❑ Blank Sample ❑ Sample(s)outside temperature criteria(PM/APM contacted by: ) ❑Sample(s)outside temperature criteria but received on ice/chilled on same day of sampling ❑ Sample(s)received at ambient temperature; placed on ice for transport by courier Ambient Temperature: ❑Air ❑ Filter Checked by: 0 4 CUSTODY SEAL: Cooler ❑ Present and Intact ❑ Present but Not Intact �t Present ❑ N/A Checked by: &-A Sample(s) ❑ Present and Intact ❑ Present but Not Intact Not Present ❑N/A Checked by: aa�. SAMPLE CONDITION: Yes No NIA Chain-of-Custody(COC)document(s)received with samples................................................... )2K- ❑ ❑ COC document(s)received complete ................................................................................. ❑ ❑ ❑Sampling date ❑Sampling time ❑ Matrix ❑ Number of containers ❑ No analysis requested ❑ Not relinquished ❑ No relinquished date ❑ No relinquished time Sampler's name indicated on COC .................................................................................... ❑ ❑ 101, Sample container labels)consistent with COC ..................................................................... T ❑ ❑ N Sample container(s)intact and in good condition .................................................................. ❑ ❑ Proper containers for analyses requested ........................................................................... CK ❑ ❑ Sufficient volume/mass for analyses requested ..................................................................... Id ❑ ❑ Samples received within holding time ................................................................................. ❑ ❑ Aqueous samples for certain analyses received within 15-minute holding time ❑ pH ❑ Residual Chlorine ❑Dissolved Sulfide ❑ Dissolved Oxygen .............................. ❑ ❑ Proper preservation chemical(s)noted on COC and/or sample container..................................... ❑ ❑ Unpreserved aqueous sample(s)received for certain analyses ❑Volatile Organics ❑Total Metals ❑ Dissolved Metals Acid/base preserved samples-pH within acceptable range ..................................................... ❑ ❑ Contai r(s)for certain analysis free of headspace.................................................................. ❑ ❑ Volatile Organics ❑ Dissolved Gases(RSK-175) ❑ Dissolved Oxygen(SM 4500) ❑ Carbon Dioxide(SM 4500) ❑ Ferrous Iron(SM 3500) ❑ Hydrogen Sulfide(Hach) TedlarTm bag(s)free of condensation ................................................................................. ❑ ` ❑ CONTAINER TY7VOAh )(i-z}P- (Trip Blank Lot Number: //A 1 Aqueous:❑VOA ❑VOAnaz ❑100PJ ❑100PJna2 ❑125AGB ❑125AGBh ❑ 125AGBp ❑125PB ❑125PBznna(pH_9) ❑250AGB ❑250CGB ❑250CGBs(pH_2) ❑250PB ❑250PBn(pH-2) ❑500AGB ❑500AGJ ❑500AGJs(pH_2) ❑500PB ❑1AGB ❑1AGBna2 ❑1AGBs(pH_2) ❑1AGBs(O&G)❑1PB ❑1PBna(pH_12) ❑ ❑ ❑ Solid:❑4ozCGJ ❑8ozCGJ ❑16ozCGJ ❑Sleeve U ❑EnCore?U ❑TerraCores®U❑ ❑ ❑ Air.❑Tedlar'rm ❑Canister ❑Sorbent Tube ❑PUF ❑ Other Matrix( ):❑ ❑ ❑ Container:A=Amber,B=Bottle,C=Clear,E=Envelope,G=Glass,J=Jar,P=Plastic,and Z=Ziploc/Resealable Bag Preservative:b=buffered,f=filtered,h=HCI,n=HNO3,na=NaOH,nag=Na2S203,p=H3PO4, Labeled/Checked by: s=H2SO4,u=ultra-pure,x=Na2SO3+NaHSO4.H2O,znna=Zn(CH3CO2)2+NaOH Reviewed by: tiff eurofins ` Q::— Eaton Analytical �# A C C R E D I T E D ��� � TESTWGTA60MTOR� 750 Royal Oaks Drive,Suite 100 Monrovia,California 91016-3629 ��T/i I ��``\` AT-1 807 Tel:(626)386-1100 Fax:(866)988-3757 1 800 566 LABS(1 800 566 5227) Laboratory Report for South Lake Tahoe Public Utilities District 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Attention: Daniel Arce Fax: 530-541-0614 . �REcoc� r Date of Issue 06/2V-"� 6/2019 Utah ELCP CA00006 EUROFINS EATON ANALYTICAL, LLC Report:808532 Project:SPECIAL UMVN: Monica Van Natta Group:8260+oygenates Project Manager Accredited in accordance with TNI 2016 and ISO/IEC 17025:2017 Laboratory certifies that the test results meet all TNI 2016 and ISO/IEC 17025:2017 requirements unless noted under the individual analysis Following the cover page are State Certification List,ISO/IEC 17025:2017 Accredited Method List,Acknowledgement of Samples Received,Comments, Hits Report,Data Report,QC Summary,QC Report and Regulatory Forms,as applicable Test results relate only to the sample(s)tested. Test results apply to the sample(s)as received,unless EEA-M collected and analyzed the sample(s)as noted in the COC and final report. This report shall not be reproduced except in full,without the written approval of the laboratory This report includes ISO/IEC 17025 2017 and non-ISO/IEC 17025.2017 accredited methods. Page 1 of 27 pages eurofins Eaton Analytical STATE CERTIFICATION LIST State Certification Number State Certification Number Alabama 41060 Montana Cert 0035 Arizona AZ0778 Nebraska Certified Arkansas Certified Nevada CA000062018 California 2813 New Hampshire ' 2959 Colorado Certified New Jersey' CA 008 Connecticut PH-0107 New Mexico Certified Delaware CA 006 New York' 320 �:Iorida ' E871024 North Carolina 06701 Georgia 947 North Dakota R-009 Guam 18-005R Oregon" CA200003-005 Hawaii Certified Pennsylvania' 68-565 Idaho Certified Puerto Rico Certified 111i',ol, 200033 Rhode Island LA000326 Indiana C-CA-01 South Carolina 87016 Iowa-Asbestos 413 South Dakota Certified Kansas E-10268 Tennessee TN02839 Kentucky 90107 Texas' 1-104704230-18-15 Louisiana ` LA180000 Utah (Primary AB) ' CA00006 Maine CA0006 Vermont VTO114 Maryland 224 Virginia' 160260 Commonwealth of MP0004 Washington C838 Northern Marianas Is. Massachusetts M-CA006 EPA Region 5 Certified Michigan 9906 Los Angeles County 10264 Sanitation Districts Mississippi Certified * NELAP/TNI Recognized Accreditation Bodies Eurofins Eaton Analytical, LLC 750 Royal Oaks Drive,Suite 100 T i 626-386-1100 Monrovia, CA 91016-3629 F 1 866-988-3757 www.EurofinsUS.com/Eaton Page 2 of 27 pages I50/IEC 17025 Accredited Method List The tests listed below are accredited and meet the requirements of ISO/IEC 17025 as verified by the ANSI-ASQ National Accreditation Board/ANAB. Refer to Certificate and scope of accreditation(AT 1807)found at:https://www.eurofinsus.com/Eaton Environ- Environ- Environ- Environ- METHOD OR mental mental rv-r- METHOD OR mental mental SPECIFIC TESTS TECHNIQUE USED (Drinking (Waste C°mpon m°fpu«r SPECIFIC TESTS Camp,m< fFW i Q g °°dB°/B,./ TECHNIQUE USED (Drinking (Waste °ndB-1Be..1 Water) Water) Borrld w°nr Water) Water) Bmrld wunr 1,2,3-TCP(5 PPT&0.5 CA SRL 524M-TCP x x Hexavalent Chromium EPA 218.7 x x PPT) 1,4-Dioxane EPA 522 x x Hexavalent Chromium SM 3500-Cr B x 2,3,7,8-TCDD Modified EPA 1613B x x Hormones EPA 539 x x Acrylamide In House Method(2440) x x Hydroxide as OH Cale. SM 2330B x x Algal Toxins/Microcystin In House Method(3570) K'eldahl Nitrogen EPA 3512 x Alkalinity SM 2320B x x x Legionella Legiolert x x Armnonia EPA 350.1 x x Mercury EPA 245.1 x x x Arrunonia SM 4500-NH3 H x x Metals EPA 200.7/200.8 x x x Anions and DBPs by IC EPA 300.0 x x x Microcystin LR ELISA(2360) x x Anions and DBPs by IC EPA 300.1 x x Microcystin,Total EPA 546 x x Asbestos EPA 100.2 x x NDMA EPA 521 In house method 2425) x x BOD/CBOD SM 5210B x x Nitrate/Nitrite Nitrogen EPA 3532 x x x Bromate In House Method(2447) x x OCL,Pesticides/PCB EPA 505 x x Carbamates EPA 531.2 x x Ortho Phosphate EPA 365.1 x x x Carbonate as CO3 SM 2330B x x x Ortho Phosphorous SM 4500P E x x Carbonyls EPA 556 x x Oxyhalides Disinfection EPA 317.0 x x Bvoroducts COD EPA 410.4/SM 5220D x Perchlorate EPA 331.0 x x Chloramines SM 4500-CL G x x x Perchlorate(low and high) EPA 314.0 x x Chlorinated Acids EPA 515.4 x x Perfluorinated Alkyl Acids EPA 537 x x Chlorinated Acids EPA 555 x x Perfluorinated Polutant In house Method(2434) x x Chlorine Dioxide SM 4500-CLO2 D x x pH EPA 150.1 x Palin Test Chlorine d Residual SM 4500-CI G x x x pH SM 4500-H+B x x x Combined Residual Phenylurea Pesticides/ In House Method,based on EPA Conductivity EPA 120.1 x Herbicides 532(2448) x x Conductivity SM 2510B x x x Pseudomonas IDEXX Pseudalert(2461) x x Corrosivity(langelier Index) SM 2330B x x Radium-226 GA Institute ofTech x x Cyanide,Amenable SM 4500-CN G x x Radium-228 GA Institute of Tech x x Cyanide,Free SM 45000N F x x x Radon-222 SM 750ORN x x Cyanide,Total EPA 335.4 x x x Residue,Filterable SM 2540C x x x Cyanogen Chloride In House Method(2470) x x Residue,Non-filterable SM 2540D x (screen) Di uat and Paraquat EPA 549.2 x x Residue,Total SM 2540B x x DBP/HAA SM 6251B x x Residue,Volatile EPA 160.4 x Dissolved Oxygen SM 4500-0 G x x Semi-VOC EPA 5252 x x DOC SM 53IOC x x Silica SM 4500-Si D x x E.Coli (MTF/EC+MUG) x x Silica SM 4500-SiO2 C x x E.Coli CFR 14I21(f)(6)(i) x x Sulfide SM 4500-S-D x E.Coli SM 9223 x Sulfite SM 4500-SOIB x x x E.Cole(Enureration) SM 9221 B.I/SM 9221 F x x Surfactants SM 5540C x x x E.Coli(Enumeration) SM 9223B x x Taste and Odor Analytes SM 6040E x x EDB/DCBP EPA 504.1 x Total Coliform(P/A) SM 9221 A,B x x EDB/DBCP and DBP EPA 551.1 x x Total Colifoml SM 9221 A,B,C x x (Enumeration) EDTA and NTA In House Method(2454) x x Total Coliform/E.coli Colisure SM 9223 x x Endothall EPA 548.1 x x Total Coliform SM 9221 B x Total Coliform with Chlorine SM 9221 B x Endothall In-house Method(2445) x x Present Enterococci SM 9230B x x Total Coliform/E.coli(P/A SM 9223 x x and Enumeration Fecal Coliform SM 9221 E(MTF/EC) x TOC SM 5310C x x x Fecal Coliform SM 9221C,E(MTF/EC) x TOX SM 5320B x Fecal Coliforrn SM 9221 E(MTF/EC) x x Total Phenols EPA 420.1 x (Enumeration) Fecal Colifonn with SM 9221 E x Total Phenols EPA 420.4 x x x Chlorine Present Fecal Stre tococci SM 9230B x x Total Phosphorous SM 4500 P E x Fluoride SM 4500-F C x x x Triazene Pesticides& In House(3617) x x De gradates Glyphosate EPA 547 x x Turbidity EPA 180.1 x x x Glyphosate+AMPA In House Method(3618) x x Turbidity SM 2130B x x Gross Alpha/Beta EPA 900.0 x x x Uranium by ICP/MS EPA 200.8 x x Gross Alpha Coprecipitation SM 7110 C x x x UV 254 SM 5910B x Hardness SM 2340B x x x VOC EPA 524.2 x x Heterotrophec Bacteria In House Method(2439) x x VOC In House Method(241 1) x x Heterotro hic Bacteria SM 9215 B x x Yeast and Mold SM 9610 x x Hexavalent Chromium EPA 218.6 x x x Field Sampling N/A 750 Royal Oaks Dr.,Ste 100,Monrovia,CA 91016 Tel(626)386-1100 Fax(866)988-3757 httos://www.eurofinsus.com/Eaton Version 003 issued:09/20/2018 Page 3 of 27 pages CHAIN OF CUSTODY South Tahoe Public Utility District Lab Sent Eurofins Preservatives: Turn-Around-Time: 1275 Meadow Crest Drive a 4 C Standard South Lake Tahoe,CA 96150 —"�,! *` Sampler(s); B.Chernago VOC-HCI Phone:(530)-543-6231 ,,,,.�•`' V b Oo o � e N a a Collection �5 Lab ID# Sample Site Date&Time m A966838 HPR Harvey Place Reservoir 0610312019 110:02 WW X Notes: Relinquished by; Received by: _Report MTBE to 0.2 ug/L _Analyze Travel and Field Blanks only if VOCs detected In samples. Signature 2' _ �1 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: e�, U3 .i Time: "Z.,3 57_ Date: -�- Time: Comments: Relinquished by: Received by: Signature Signature Print Print Company Company Date: I Time: Date: Time: En Page 1 of 1 eurofins I Eaton Analytical INTERNAL CHAIN OF CUSTODY RECORD EEAFolderNumber; SAMPLE TEMP RECEIVED: �U Note:If sampler are out of temperature ranee,let the ASMs know.ASMs will determine whether to proceed with analysis or not, SAMPLES REC'D DAY OF COLLECTION? Yes/ No IR Gun ID= "` , " (Observation= L '� °C) (Corr.Factor� °C) (Final= ��- °C) TYPE OF ICE: Real Synthetic V No Ice CONDITION OF ICE: Frozen Partially Frozen Thawed NIA METHOD OF SHIPMENT: Pick-Up I Walk-In / �- --r UPS I DHL I Area Fast / Top Line I Other: Compliance Acceptance Criteria: 1) Chemistry: >0,s 6°C,not frozen(NELAP)(If received after 24 hrs'of sample collection) - -— - 2) Microbiology,Distribution: <10°C,not frozen(can be a10°C If received on Ice the same day as sample collection,within 6 hours) 3) Microbiology,Surface Water: <10°C(If received after 2 hours of sample collection) II out of temperature range for both Chemistry and Mloroblology enmplas and temperature does not con0mt,Dion measure the lemporaluro of each 1°Obaorvoeon•_'C (Corr,Foctor^'C)(Fhml• 2°Observoeon°_'C Corrf aclor 'C) Final° C quadrant and record each temperature of the quadrants 3 o(Obsorvallon• 'C Corr,Factor_'C (Final• 'C 4•observallon• 'C Cort.Faclor,_% Final- 'C 4 Dioxin (1613 or 2,3,7,E TCDD): must be between 0-4°C,not frozen(if received after 24 hre of sample collection) 5) pH Check, Manufacturer: Lot Number: DI-1 strip type: 0-14 or Expiration Dale Results: 6) Chlorine check. Manufacturer:Sensafe. Lot No.: Expiration Date: Results 7) VOA Headspace: No Samples with Headspace: Samples with Headspace(see below): Headspace Documentation(use additional VOC Internal COFC for additional bottles) Exempt from hoadspaca concerns: Methods 515.4,HAA(0261,552),500,SP14E,@CH,532LCM5,660,530,Anatoxin,LCMS methods using 40 ml viols, International clients: Sump ID Bottle ff Nono/<g >Omni Samp ID Boltie f{ NDno/<g ,Omm Sump ID Bottle 0 Nona/<O >Omm Somp ID Bolllo ff None/<O >Omni MITI mm MITI TOM Note Sample IDS which have dissimilar headspece(Le.potential sampling errors): SU34AWRE PRINT NAME COMPANWITLE GATE TIME RC•CE VEtl a � (�a I ,✓` ( j(/'S EuroOns Eaton Analytical co 0 v QAF0008BJ(OArO•FRM55a4)15123119)ver7 Page of v • cn m w Page 1 of 1 o mq o w L~J7 C mS R�1=SZ N - �_ fz o X U)rp O� y 0 m OOS2G CA.) O '1l tn� ATT a) OO -icy CO n M a o �" - w D > D j $ o CDN 0 m� GT1 _ Z o_ O _ C) cn D o r T —a M oo 53 �cn.. A mA n 0 Zmz C CO M Z a w rMI anoi�o�arn� ° 555J1021023PD After printing this label: 1.Use the'Print'button on this page to print your label to your laser or inkjet printer. 2.Fold the printed page along the horizontal line. 3.Place label in shipping pouch and affix it to your shipment so that the barcode portion of the label can be read and scanned. Warning:Use only the printed original label for shipping.Using a photocopy of this label for shipping purposes is fraudulent and could result in additional billing charges,along with the cancellation of your FedEx account number. Use of this system constitutes your agreement to the service conditions in the current FedEx Service Guide,available on fedex.com.FedEx will not be responsible for any claim in excess of$100 per package,whether the result of loss,damage,delay,non- delivery,misdelivery,or misinformation,unless you declare a higher value,pay an additional charge,document your actual loss and file a timely claim.Limitations found in the current FedEx Service Guide apply.Your right to recover from FedEx for any loss,including intrinsic value of the package,loss of sales,income interest,profit,attorney's fees,costs,and other forms of damage whether direct, incidental,consequential,or special is limited to the greater of$100 or the authorized declared value.Recovery cannot exceed actual documented Ioss.Maximum for items of extraordinary value is$1,000,e.g.jewelry,precious metals,negotiable instruments and other items listed in our ServiceGuide.Written claims must be filed within strict time limits,see current t'edEx Service Guide. https:Hww,vv.fedex.com/shippingAitml/en/PrintIFrame.html 6/PQQ b9of 27 pages ti•~ eurofins Eaton Analytical Laboratory Comments Report:808532 Tel:(626)386-1100 Fax:(866)988-3757 Project:SPECIAL 1 800 566 LABS(1 800 566 5227) Group: 8260+oygenates South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Folder Comments Results for 8260 are submitted by Eurofins Calscience in Garden Grove CA The Comments Report may be blank if there are no comments for this report. Page 7 of 27 pages eurofins Eaton Analytical Laboratory Data Report:808532 Tel:(626)386-1100 Project: SPECIAL Fax:(866)988-3757 Group: 8260+oygenates 1 800 566 LABS(1 800 566 5227) Samples Received on: 06/04/2019 1157 South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe,CA 96150 Prepared Analyzed Prep Batch Analyzed Batch Method Analyte Result Units MRL Dilution HPR(201906040128) Sampled on 06/03/2019 1002 Variable ID:AG66838 EPA 8260B-4848_8260 VOC W Super List 06/14/19 06/15/19 11:14 (EPA 8260B) 1,1,1,2-Tetrachloroethane ND ug/L 2 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,1,1-Trichloroethane ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,1,2,2-Tetrachloroethane ND ug/L 10 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,1,2-Tdchloro-1,2,2-trifluoroethane ND ug/L 10 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,1,2-Trichloroethane ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,1-Dichloroethane ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,1-Dichloroethene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,1-Dichloropropene ND ug/L 1 1 O6/14/19 06/15/19 11:14 (EPA 8260B) 1,2,3-Tdchlorobenzene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,2,3-Tdchloropropane ND ug/L 5 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,2,4-Tdchlorobenzene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,2,4-Tdmethylbenzene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,2-Dibromo-3-chloropropane ND ug/L 10 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,2-Dibromoethane ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,2-Dichlorobenzene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,2-Dichloroethane ND ug/L 0.5 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,2-Dichloropropane ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,3,5-Tdmethylbenzene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,3-butadiene ND ug/L 25 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,3-Dichlorobenzene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,3-Dichloropropane ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,4-Dichlorobenzene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,4-Dioxane ND ug/L 100 1 O6/14/19 06/15/19 11:14 (EPA 8260B) 2,2-Dichloropropane ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) 2-Butanone ND ug/L 20 1 06/14/19 06/15/19 11:14 (EPA 8260B) 2-Chloroethyl vinyl ether ND ug/L. 50 1 06/14/19 06/15/19 11:14 (EPA 8260B) 2-Chlorotoluene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) 2-Hexanone ND ug/L 10 1 06/14/19 06/15/19 11:14 (EPA 8260B) 2-Methyl-2-Butanol(TAA) ND ug/L 50 1 Rounding on totals after summation. (c)-indicates calculated results.Analysis is a calculated result.Reported results are not rounded until the final step before reporting.Therefore methods that use a test result with further calculation may have slight difterences in final result than the component analyses. Page 8 of 27 pages eurofins Eaton Analytical Laboratory Data Report: 808532 Tel:(626)386-1100 Project:SPECIAL Fax:(866)988-3757 Group:8260+oygenates 1 800 566 LABS(1 800 566 5227) Samples Received on: 06/04/2019 1157 South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe,CA 96150 Prepared Analyzed Prep Batch Analyzed Batch Method Analyte Result Units MRL Dilution 06/14/19 06/15/19 11:14 (EPA 82606) 4-chlorotoluene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) 4-methyl-2-Pentanone ND ug/L 10 1 06/14/19 06/15/19 11:14 (EPA 8260B) Acetone ND ug/L 20 1 06/14/19 06/15/19 11:14 (EPA 8260B) Acetonitrile ND ug/L 20 1 06/14/19 06/15/19 11:14 (EPA 8260B) Acrolein ND ug/L 50 1 06/14/19 06/15/19 11:14 (EPA 8260B) Acrylonitrile ND ug/L 20 1 06/14/19 06/15/19 11:14 (EPA 8260B) Benzene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) Bromobenzene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) Bromochloromethane ND ug/L 2 1 06/14/19 06/15/19 11:14 (EPA 8260B) Bromodichloromethane ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) Bromoform ND ug/L 5 1 06/14/19 06/15/19 11:14 (EPA 8260B) Bromomethane ND ug/L 50 1 06/14/19 06/15/19 11:14 (EPA 8260B) c-1,2-Dichloroethene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) Carbon disulfide ND ug/L 10 1 06/14/19 06/15/19 11:14 (EPA 8260B) Carbon Tetrachloride ND ug/L 0.5 1 06/14/19 06/15/19 11:14 (EPA 8260B) Chlorobenzene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) Chloroethane ND ug/L 5 1 06/14/19 06/15/19 11:14 (EPA 8260B) Chloroform ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) Chloromethane ND ug/L 10 1 06/14/19 06/15/19 11:14 (EPA 8260B) cis-1,3-Dichloropropene ND ug/L 0.5 1 06/14/19 06/15/19 11:14 (EPA 8260B) Cyclohexane ND ug/L 10 1 06/14/19 06/15/19 11:14 (EPA 8260B) Cyclohexanone ND ug/L 50 1 06/14/19 06/15/19 11:14 (EPA 8260B) Dibromochloromethane ND ug/L 2 1 06/14/19 06/15/19 11:14 (EPA 8260B) Dibromomethane ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) Dichlorodifluoromethane ND ug/L 5 1 06/14/19 06/15/19 11:14 (EPA 8260B) Diethyl Ether ND ug/L 10 1 06/14/19 06/15/19 11:14 (EPA 8260B) Diisopropyl Ether(DIPE) ND ug/L 2 1 06/14/19 06/15/19 11:14 (EPA 8260B) Ethanol ND ug/L 100 1 06/14/19 06/15/19 11:14 (EPA 8260B) Ethylbenzene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) Hexachloro-1,3-Butadiene ND ug/L 20 1 06/14/19 06/15/19 11:14 (EPA 8260B) Hexane ND ug/L 5 1 06/14/19 06/15/19 11:14 (EPA 8260B) lodomethane ND ug/L 50 1 06/14/19 06/15/19 11:14 (EPA 8260B) Isobutyl Alcohol ND ug/L 50 1 Rounding on totals aRersummation. (c)-indicates calculated results.Analysis is a calculated result.Reported results are not rounded until the _ final step before reporting.Therefore methods that use a test result with further calculation may have slight differences in final result than the component analyses. Page 9 of 27 pages ti•� eurofins I Eaton Analytical Laboratory Data Report: 808532 Tel:(626)386-1100 Project: SPECIAL Fax:(866)988-3757 Group:8260+oygenates 1 800 566 LABS(1 800 566 5227) Samples Received on: 06/04/2019 1157 South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Prepared Analyzed Prep Batch Analyzed Batch Method Analyte Result Units MRL Dilution 06/14/19 06/15/19 11:14 (EPA 8260B) Isopropanol ND ug/L 200 1 06/14/19 06/15/19 11:14 (EPA 8260B) I sopropyl benzene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) m,p-Xylene ND ug/L 2 1 06/14/19 06/15/19 11:14 (EPA 8260B) Methylene chloride ND ug/L 10 1 06/14/19 06/15/19 11:14 (EPA 8260B) Methyl-t Butyl Ether(MTBE) ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) naphthalene ND ug/L 10 1 06/14/19 06/15/19 11:14 (EPA 8260B) n-Butylbenzene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) n-Propyl benzene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) o-Xylene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) p-Isopropyltoluene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) sec-Butyl benzene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) Styrene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) t-1,2-Dichloroethene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) t-1,3-Dichloropropene ND ug/L 0.5 1 06/14/19 06/15/19 11:14 (EPA 8260B) t-1,4-Dichloro-2-Butene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) Tert-Butyl Alcohol(TBA) ND ug/L 10 1 06/14/19 06/15/19 11:14 (EPA 8260B) tert-Butylbenzene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) Tetrachloroethene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) Tetrahydrofuran ND ug/L 20 1 06/14/19 06/15/19 11:14 (EPA 8260B) Thiophene ND ug/L 10 1 06/14/19 06/15/19 11:14 (EPA 8260B) Toluene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) Trichloroethene ND ug/L 1 1 06/14/19 06/15/19 11:14 (EPA 8260B) Trichlorofluoromethane ND ug/L 10 1 06/14/19 06/15/19 11:14 (EPA 8260B) Vinyl Acetate ND ug/L 10 1 06/14/19 06/15/19 11:14 (EPA 8260B) Vinyl chloride ND ug/L 0.5 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,2-Dichloroethane-d4 96.0 % 1 06/14/19 06/15/19 11:14 (EPA 8260B) 1,4-Bromofluorobenzene 92.0 % 1 06/14/19 06/15/19 11:14 (EPA 8260B) Dibromofluoromethane 102 % 1 06/14/19 06/15/19 11:14 (EPA 8260B) Toluene-d8 99.0 % 1 Rounding on totals after summation. (c)-indicates calculated results.Analysis is a calculated result.Reported results are not rounded until the final step before reporting.Therefore methods that use a test result with further calculation may have slight differences in final result than the component analyses. Page 10 of 27 pages - Page 1 of 17 r' eurofins ti. _ Calscience WORK ORDER NUMBER: 19-06-0332 The difference is service r AIR I SOIL I WATER I MARINE CHEMISTRY Analytical Report For Client: Eurofins Eaton Analytical, Inc Client Project Name: 808532 / SOLAKETAH Attention: Jaclyn Contreras 750 Royal Oaks Drive Suite 100 Monrovia, CA 91016-3629 4 I 4 k Approved for release on 06/18/2019 by: Cecile deGuia ResultLink ► Project Manager Email your PM ► Eurofins Calscience(Calscience)certifies that the test results provided in this report meet all NELAC Institute requirements for parameters for which accreditation is required or available.Any exceptions to NELAC Institute requirements are noted in the case narrative.The original report of subcontracted analyses,if any,is attached to this report.The results in this report are limited to the sample(s)tested and any reproduction thereof must be made in its entirety.The client or recipient of this report is specifically prohibited from making material changes to said report and,to the extent that such changes are made,Calscience is not responsible, legally or otherwise.The client or recipient agrees to indemnify Calscience for any defense to any litigation which may arise. 1 LincolnGrove, / Page 11 of 27 pages Page 2 of 17 ,* eurofins Calscience Contents Client Project Name: 808532/SOLAKETAH Work Order Number: 19-06-0332 1 Work Order Narrative. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Sample Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Client Sample Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.1 EPA 8260B Volatile Organics (Aqueous). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Quality Control Sample Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.1 LCS/LCSD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5 Sample Analysis Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6 Glossary of Terms and Qualifiers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 7 Chain-of-Custody/Sample Receipt Form. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 • FAX:(714)894-7501 Page 12 of 27 pages Page 3 of 17 4.1%% e u rof i ns I Work Order Narrative Calscience Work Order: 19-06-0332 Page 1 of 1 Condition Upon Receipt: Samples were received under Chain-of-Custody(COC)on 06/06/19.They were assigned to Work Order 19-06-0332. Unless otherwise noted on the Sample Receiving forms all samples were received in good condition and within the recommended EPA temperature criteria for the methods noted on the COC. The COC and Sample Receiving Documents are integral elements of the analytical report and are presented at the back of the report. Holding Times: All samples were analyzed within prescribed holding times (HT)and/or in accordance with the Calscience Sample Acceptance Policy unless otherwise noted in the analytical report and/or comprehensive case narrative, if required. Any parameter identified in 40CFR Part 136.3 Table II that is designated as"analyze immediately"with a holding time of<= 15 minutes(40CFR-136.3 Table II,footnote 4), is considered a"field"test and the reported results will be qualified as being received outside of the stated holding time unless received at the laboratory within 15 minutes of the collection time. Quality Control: All quality control parameters(QC)were within established control limits except where noted in the QC summary forms or described further within this report. - s U Subcontractor Information: ° Unless otherwise noted below(or on the subcontract form), no samples were subcontracted. Additional Comments: Air-Sorbent-extracted air methods(EPA TO-4A, EPA TO-13A):Analytical results are converted from mass/sample basis to mass/volume basis using client-supplied air volumes. Solid-Unless otherwise indicated, solid sample data is reported on a wet weight basis, not corrected for% moisture.All QC results are always reported on a wet weight basis. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 • FAX:(714)894-7501 Page 13 of 27 pages Page 4 of 17 41. eurof ins Sample Summary Calscience Client: Eurofins Eaton Analytical, Inc Work Order: 19-06-0332 750 Royal Oaks Drive, Suite 100 Project Name: 808532/SOLAKETAH Monrovia, CA 91016-3629 PO Number: 99-66911 DatefTime 06/06/19 12:05 Received: Number of 3 Containers: Attn: Jaclyn Contreras Sample Identification Lab Number Collection Date and Time Number of Matrix Containers 201906040128 19-06-0332-1 06/03/19 10:02 3 Aqueous t U 0 s 7440 Lincoln Way,Garden Grove,CA 92841-1427 TEL:(714)895-5494 FAX:(714)894-7501 Page 14 of 27 pages Page 5 of 17 ti. eurofins I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 06/06/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-06-0332 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260E Units: ug/L Project: 808532/SOLAKETAH Page 1 of 6 Client Sample Number Lab Sample Date/Time Matrix Instrument Date Date/Time QC Batch ID Number Collected Prepared Analyzed 201906040128 19-06-0332-1-A- 06/03119:; ;. ;`Aqueous GC/MS'PP- gW14119_ 06/15/19 190614L033 `10:02 Comment(s): Results were evaluated to the MDL(DL),concentrations>=to the MDL(DL)but<RL(LOQ),if found,are qualified with a"J"flag. Parameter Result RL MDL DF Qualifiers Isobutyl Alcohol ND 50 20 1.00 Cyclohexanone ND 50 6.1 1.00 2-Methyl-2-Butanol(TAA) ND 50 15 1.00 Acetone ND 20 10 1.00 Benzene ND 1.0 0.14 1.00 Bromobenzene ND 1.0 0.19 1.00 Bromochloromethane ND 2.0 0.46 1.00 Bromodichloromethane ND 1.0 0.23 1.00 Bromoform ND 5.0 1.8 1.00 Bromomethane ND 50 19 1.00 0 2-Butanone ND 20 6.6 1.00 0 n-Butylbenzene ND 1.0 0.30 1.00 sec-Butyl benzene ND 1.0 0.19 1.00 tert-Butylbenzene ND 1.0 0.25 1.00 Diethyl Ether ND 10 0.31 1.00 Carbon Disulfide ND 10 0.70 1.00 Carbon Tetrachloride ND 0.50 0.23 1.00 Chlorobenzene ND 1.0 0.16 1.00 Chloroethane ND 5.0 0.76 1.00 2-Chloroethyl Vinyl Ether ND 50 9.0 1.00 Chloroform ND 1.0 0.18 1.00 Chloromethane ND 10 0.50 1.00 2-Chlorotoluene ND 1.0 0.16 1.00 4-Chlorotoluene ND 1.0 0.18 1.00 Dibromochloromethane ND 2.0 0.46 1.00 1,2-Dibromo-3-Chloropropane ND 10 2.1 1.00 1,2-Dibromoethane ND 1.0 0.27 1.00 Dibromomethane ND 1.0 0.30 1.00 1,2-Dichlorobenzene ND 1.0 0.14 1.00 1,3-Dichlorobenzene ND 1.0 0.19 1.00 1,4-Dichlorobenzene ND 1.0 0.24 1.00 Dichlorodifluoromethane ND 5.0 0.28 1.00 1,1-Dichloroethane ND 1.0 0.28 1.00 1,2-Dichloroethane ND 0.50 0.19 1.00 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 15 of 27 pages Page 6 of 17 ti~ e u rof ins I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 06/06/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-06-0332 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 808532/SOLAKETAH Page 2 of 6 Parameter Result RL MDL DF Qualifiers 1,1-Dichloroethene ND 1.0 0.22 1.00 c-1,2-Dichloroethene ND 1.0 0.27 1.00 t-1,2-Dichloroethene ND 1.0 0.40 1.00 Acetonitrile ND 50 1.5 1.00 1,2-Dichloropropane ND 1.0 0.20 1.00 Acrolein ND 50 2.4 1.00 Acrylonitrile ND 20 3.1 1.00 1,3-Dichloropropane ND 1.0 0.14 1.00 2,2-Dichloropropane ND 1.0 0.44 1.00 1,1-Dichloropropene ND 1.0 0.17 1.00 c-1,3-Dichloropropene ND 0.50 0.20 1.00 t-1,3-Dichloropropene ND 0.50 0.23 1.00 Ethylbenzene ND 1.0 0.14 1.00 2-Hexanone ND 10 5.3 1.00 0 Isopropylbenzene ND 1.0 0.16 1.00 0 0 p-Isopropyltoluene ND 1.0 0.22 1.00 Methylene Chloride ND 10 4.0 1.00 1� 4-Methyl-2-Pentanone ND 10 0.46 1.00 Naphthalene ND 10 5.1 1.00 n-Propylbenzene ND 1.0 0.18 1.00 Styrene ND 1.0 0.15 1.00 1,1,1,2-Tetrachloroethane ND 2.0 0.43 1.00 1,1,2,2-Tetrachloroethane ND 10 0.17 1.00 Tetrachloroethene ND 1.0 0.24 1.00 Toluene ND 1.0 0.13 1.00 1,2,3-Trichlorobenzene ND 1.0 0.28 1.00 1,2,4-Trichlorobenzene ND 1.0 0.34 1.00 1,1,1-Trichloroethane ND 1.0 0.31 1.00 Hexachloro-1,3-Butadiene ND 20 0.42 1.00 1,1,2-Trichloro-1,2,2-Trifluoroethane ND 10 0.62 1.00 1,1,2-Trichloroethane ND 1.0 0.22 1.00 lodomethane ND 50 19 1.00 Trichloroethene ND 1.0 0.24 1.00 Trichlorofluoromethane ND 10 0.28 1.00 1,2,3-Trichooropropane ND 5.0 0.22 1.00 1,2,4-Trimethylbenzene ND 1.0 0.21 1.00 1,3,5-Trimethylbenzene ND 1.0 0.17 1.00 Vinyl Acetate ND 10 2.9 1.00 Vinyl Chloride ND 0.50 0.16 1.00 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 16 of 27 pages Page 7 of 17 ;4 eurofins Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 06/06/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-06-0332 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260E Units: ug/L Project: 808532/SOLAKETAH Page 3 of 6 Parameter Result RL MDL DF Qualifiers p/m-Xylene ND 2.0 0.31 1.00 o-Xylene ND 1.0 0.15 1.00 Methyl-t-Butyl Ether(MTBE) ND 1.0 0.16 1.00 t-1,4-Dichloro-2-Butene ND 20 2.6 1.00 Tetrahydrofuran ND 20 3.3 1.00 Tert-Butyl Alcohol(TBA) ND 10 3.1 1.00 Diisopropyl Ether(DIPE) ND 2.0 0.16 1.00 Ethyl-t-Butyl Ether(ETBE) ND 2.0 0.12 1.00 Tert-Amyl-Methyl Ether(TAME) ND 2.0 0.13 1.00 Ethanol ND 100 53 1.00 Cyclohexane ND 10 3.3 1.00 Thiophene ND 10 0.16 1.00 1,4-Dioxane ND 100 26 1.00 Hexane ND 5.0 0.95 1.00 s 1,3-Butadiene ND 25 0.95 1.00 U O Isopropanol ND 200 100 1.00 2,2,4-Trimethyl Pentane ND 10 0.82 1.00 12 Surrogate Rec. °° Control Limits Qualifiers 1,4-Bromofluorobenzene 92 77-120 Dibromofluoromethane 102 80-128 1,2-Dichloroethane-d4 96 80-129 Toluene-d8 99 80-120 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 • FAX:(714)894-7501 Page 17 of 27 pages Page 8 of 17 ti} eurofins Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 06/06/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-06-0332 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260E Units: ug/L Project: 808532/SOLAKETAH Page 4 of 6 Client Sample Number Lab Sample Datefrime Matrix Instrument Date Date/Time QC Batch ID Number Collected Prepared Analyzed Method Blank 099-14-001-29021 NIA Aqueous GCIMS,PP 06114/19 06/15/19 190614LO33 06:10 Comment(s): Results were evaluated to the MDL(DL),concentrations>=to the MDL(DL)but<RL(LOQ),if found,are qualified with a"J"flag. Parameter Result RL MDL DF Qualifiers Isobutyl Alcohol ND 50 20 1.00 Cyclohexanone ND 50 6.1 1.00 2-Methyl-2-Butanol(TAA) ND 50 15 1.00 Acetone ND 20 10 1.00 Benzene ND 1.0 0.14 1.00 Bromobenzene ND 1.0 0.19 1.00 Bromochloromethane ND 2.0 0.46 1.00 Bromodichloromethane ND 1.0 0.23 1.00 Bromoform ND 5.0 1.8 1.00 Bromomethane ND 50 19 1.00 2-Butanone ND 20 6.6 1.00 0 n-Butylbenzene ND 1.0 0.30 1.00 sec-Butylbenzene ND 1.0 0.19 1.00 tert-Butylbenzene ND 1.0 0.25 1.00 Diethyl Ether ND 10 0.31 1.00 Carbon Disulfide ND 10 0.70 1.00 Carbon Tetrachloride ND 0.50 0.23 1.00 Chlorobenzene ND 1.0 0.16 1.00 Chloroethane ND 5.0 0.76 1.00 2-Chloroethyl Vinyl Ether ND 50 9.0 1.00 Chloroform ND 1.0 0.18 1.00 Chloromethane ND 10 0.50 1.00 2-Chlorotoluene ND 1.0 0.16 1.00 4-Chlorotoluene ND 1.0 0.18 1.00 Dibromochloromethane ND 2.0 0.46 1.00 1,2-Dibromo-3-Chloropropane ND 10 2.1 1.00 1,2-Dibromoethane ND 1.0 0.27 1.00 Dibromomethane ND 1.0 0.30 1.00 1,2-Dichlorobenzene ND 1.0 0.14 1.00 1,3-Dichlorobenzene ND 1.0 0.19 1.00 1,4-Dichlorobenzene ND 1.0 0.24 1.00 Dichlorodifluoromethane ND 5.0 0.28 1.00 1,1-Dichloroethane ND 1.0 0.28 1.00 1,2-Dichloroethane ND 0.50 0.19 1.00 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 18 of 27 pages Page 9 of 17 41. eurof ins Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 06/06/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-06-0332 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 808532/SOLAKETAH Page 5 of 6 Parameter Result RL MDL DF Qualifiers 1,1-Dichloroethene ND 1.0 0.22 1.00 c-1,2-Dichloroethene ND 1.0 0.27 1.00 t-1,2-Dichloroethene ND 1.0 0.40 1.00 Acetonitrile ND 50 1.5 1.00 1,2-Dichloropropane ND 1.0 0.20 1.00 Acrolein ND 50 2.4 1.00 Acrylonitrile ND 20 3.1 1.00 1,3-Dichloropropane ND 1.0 0.14 1.00 2,2-Dichloropropane ND 1.0 0.44 1.00 1,1-Dichloropropene ND 1.0 0.17 1.00 c-1,3-Dichloropropene ND 0.50 0.20 1.00 t-1,3-Dichloropropene ND 0.50 0.23 1.00 Ethylbenzene ND 1.0 0.14 1.00 2-Hexanone ND 10 5.3 1.00 - Isopropyl benzene ND 1.0 0.16 1.00 p-Isopropyltoluene ND 1.0 0.22 1.00 Methylene Chloride ND 10 4.0 1.00 4-Methyl-2-Pentanone ND 10 0.46 1.00 Naphthalene ND 10 5.1 1.00 n-Propylbenzene ND 1.0 0.18 1.00 Styrene ND 1.0 0.15 1.00 1,1,1,2-Tetrachloroethane ND 2.0 0.43 1.00 1,1,2,2-Tetrachloroethane ND 10 0.17 1.00 Tetrachloroethene ND 1.0 0.24 1.00 Toluene ND 1.0 0.13 1.00 1,2,3-Trichlorobenzene ND 1.0 0.28 1.00 1,2,4-Trichlorobenzene ND 1.0 0.34 1.00 1,1,1-Trichloroethane ND 1.0 0.31 1.00 Hexachloro-1,3-Butadiene ND 20 0.42 1.00 1,1,2-Trichloro-1,2,2-Trifluoroethane ND 10 0.62 1.00 1,1,2-Trichloroethane ND 1.0 0.22 1.00 lodomethane ND 50 19 1.00 Trichloroethene ND 1.0 0.24 1.00 Trichlorofluoromethane ND 10 0.28 1.00 1,2,3-Tiichloropropane ND 5.0 0.22 1.00 1,2,4-Trimethylbenzene ND 1.0 0.21 1.00 1,3,5-Trimethylbenzene ND 1.0 0.17 1.00 Vinyl Acetate ND 10 2.9 1.00 Vinyl Chloride ND 0.50 0.16 1.00 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 19 of 27 pages Page 10 of 17 ti•; eurof ins I Analytical Report Calscience Eurofins Eaton Analytical, Inc Date Received: 06/06/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-06-0332 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Units: ug/L Project: 808532/SOLAKETAH Page 6 of 6 Parameter Result RL MDL DF Qualifiers p/m-Xylene ND 2.0 0.31 1.00 o-Xylene ND 1.0 0.15 1.00 Methyl-t-Butyl Ether(MTBE) ND 1.0 0.16 1.00 t-1,4-Dichloro-2-Butene ND 20 2.6 1.00 Tetrahydrofuran ND 20 3.3 1.00 Tert-Butyl Alcohol(TBA) ND 10 3.1 1.00 Diisopropyl Ether(DIPE) ND 2.0 0.16 1.00 Ethyl-t-Butyl Ether(ETBE) ND 2.0 0.12 1.00 Tert-Amyl-Methyl Ether(TAME) ND 2.0 0.13 1.00 Ethanol ND 100 53 1.00 Cyclohexane ND 10 3.3 1.00 Thiophene ND 10 0.16 1.00 1,4-Dioxane ND 100 26 1.00 Hexane ND 5.0 0.95 1.00 - 0 1,3-Butadiene ND 25 0.95 1.00 Isopropanol ND 200 100 1.00 2,2,4-Trimethyl Pentane ND 10 0.82 1.00 Surrogate Rec. °o Control Limits Qualifiers 1,4-Bromofluorobenzene 95 77-120 Dibromofluoromethane 100 80-128 1,2-Dichloroethane-d4 95 80-129 Toluene-d8 98 80-120 RL: Reporting Limit. DF: Dilution Factor. MDL: Method Detection Limit. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 • FAX:(714)894-7501 Page 20 of 27 pages Page 11 of 17 ti eurofins Quality Control - LCS/LCSD Calscience Eurofins Eaton Analytical, Inc Date Received: 06/06/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-06-0332 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260E Project: 808532/SOLAKETAH Page 1 of 3 Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed LCS/LCSD Batch Number 099-14-001-29021, LCS Aqueous GC/MS PP 06114/19 06/15119 04:08 190614L033 099-14=001-29021 LCSD. Aqueous , GC/MS PP 06/14/19 06/15119 04:38 190614L033 Parameter aaft LCS Conc. LCS LCSD LCSD °oRec.CL ME CL RPD RPD CL Qualifiers Added %Rec. Conc. °oRec. Cyclohexanone 250.0 200.8 80 185.0 74 50-150 33-167 8 0-30 2-Methyl-2-Butanol(TAA) 250.0 241.4 97 262.1 105 50-150 33-167 8 0-21 Acetone 50.00 49.23 98 48.35 97 53-137 39-151 2 0-21 Benzene 50.00 48.80 98 51.92 104 79-121 72-128 6 0-20 Bromobenzene 50.00 51.34 103 52.80 106 80-120 73-127 3 0-20 Bromochloromethane 50.00 50.22 100 51.81 104 80-122 73-129 3 0-20 Bromodichloromethane 50.00 55.22 110 58.51 117 80-124 73-131 6 0-20 Bromoform 50.00 65.06 130 65.63 131 73-127 64-136 1 0-20 ME Bromomethane 50.00 44.83 90 45.46 91 50-150 33-167 1 0-26 2-Butanone 50.00 45.31 91 45.70 91 60-126 49-137 1 0-20 n-Butylbenzene 50.00 50.02 100 51.35 103 72-138 61-149 3 0-20 sec-Butylbenzene 50.00 49.60 99 51.46 103 77-131 68-140 4 0-20 tert-Butylbenzene 50.00 47.78 96 49.69 99 80-125 72-132 4 0-20 Diethyl Ether 50.00 51.67 103 52.90 106 71-125 62-134 2 0-22 Carbon Disulfide 50.00 48.38 97 51.42 103 50-150 33-167 6 0-22 Carbon Tetrachloride 50.00 56.49 113 61.36 123 65-143 52-156 8 0-20 Chlorobenzene 50.00 49.98 100 51.94 104 80-120 73-127 4 0-20 Chloroethane 50.00 46.19 92 48.65 97 62-128 51-139 5 0-20 Chloroform 50.00 49.80 100 51.32 103 80-120 73-127 3 0-20 Chloromethane 50.00 36.33 73 37.17 74 43-133 28-148 2 0-20 2-Chlorotoluene 50.00 49.92 100 52.54 105 80-121 73-128 5 0-20 4-Chlorotoluene 50.00 50.59 101 52.04 104 80-120 73-127 3 0-20 Dibromochloromethane 50.00 68.43 137 69.83 140 80-123 73-130 2 0-20 X 1,2-Dibromo-3-Chloropropane 50.00 59.50 119 59.48 119 66-126 56-136 0 0-20 1,2-Dibromoethane 50.00 53.62 107 54.18 108 80-120 73-127 1 0-20 Dibromomethane 50.00 50.94 102 52.15 104 80-120 73-127 2 0-20 1,2-Dichlorobenzene 50.00 51.08 102 51.58 103 80-120 73-127 1 0-20 1,3-Dichlorobenzene 50.00 49.80 100 51.15 102 80-120 73-127 3 0-20 1,4-Dichlorobenzene 50.00 50.18 100 51.49 103 80-120 73-127 3 0-20 Dichlorodifluoromethane 50.00 34.17 68 35.36 71 50-150 33-167 3 0-30 1,1-Dichloroethane 50.00 42.82 86 45.36 91 72-126 63-135 6 0-20 1,2-Dichloroethane 50.00 49.86 100 50.73 101 76-120 69-127 2 0-20 1,1-Dichloroethene 50.00 48.94 98 51.11 102 66-132 55-143 4 0-20 c-1,2-Dichloroethene 50.00 51.25 103 53.84 108 78-120 71-127 5 0-20 t-1,2-Dichloroethene 50.00 48.71 97 51.50 103 66-132 55-143 6 0-20 1,2-Dichloropropane 50.00 44.80 90 47.70 95 80-120 73-127 6 0-20 RPD:Relative Percent Difference. CL:Control Limits 7440 Lincoln Way,Garden Grove,CA 92841-1427 - TEL:(714)895-5494 FAX:(714)894-7501 Page 21 of 27 pages Page 12 of 17 ti. eurofins Quality Control - LCS/LCSD Calscience Eurofins Eaton Analytical, Inc Date Received: 06/06/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-06-0332 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Project: 808532/SOLAKETAH Page 2 of 3 Parameter Soike LCS Conc. LCS LCSD LCSD °oRec.CL ME CL RPD RPD CL Qualifiers Added %Rec. Conc. %Rec. 1,3-Dichloropropane 50.00 49.88 100 49.90 100 80-120 73-127 0 0-20 2,2-Dichloropropane 50.00 32.34 65 35.20 70 50-150 33-167 8 0-20 1,1-Dichloropropene 50.00 48.51 97 51.26 103 75-123 67-131 6 0-20 c-1,3-Dichloropropene 50.00 45.54 91 47.47 95 77-131 68-140 4 0-20 t-1,3-Dichloropropene 50.00 42.52 85 42.61 85 76-136 66-146 0 0-20 Ethylbenzene 50.00 49.63 99 52.18 104 80-120 73-127 5 0-20 2-Hexanone 50.00 47.85 96 47.62 95 63-123 53-133 0 0-20 Isopropylbenzene 50.00 51.10 102 54.03 108 80-128 72-136 6 0-20 p-Isopropyltoluene 50.00 49.44 99 52.07 104 73-133 63-143 5 0-20 Methylene Chloride 50.00 47.41 95 49.11 98 61-133 49-145 4 0-27 4-Methyl-2-Pentanone 50.00 45.38 91 46.16 92 65-125 55-135 2 0-20 Naphthalene 50.00 47.51 95 46.90 94, 69-129 59-139 1 0-20 n-Propylbenzene 50.00 51.71 103 54.59 109 80-128 72-136 5 0-20 Styrene 50.00 51.62 103 54.10 108 80-126 72-134 5 0-20 v 1,1,1,2-Tetrachloroethane 50.00 61.00 122 64.10 128 80-129 72-137 5 0-20 U 1,1,2,2-Tetrachloroethane 50.00 48.85 98 48.77 98 74-122 66-130 0 0-20 ° Tetrachloroethene 50.00 55.66 111 57.08 114 55-139 41-153 3 0-23 - Toluene 50.00 48.51 97 51.41 103 80-120 73-127 6 0-20 1,2,3-Trichlorobenzene 50.00 49.24 98 49.82 100 72-132 62-142 1 0-20 1,2,4-Trichlorobenzene 50.00 49.95 100 49.77 100 74-134 64-144 0 0-20 1,1,1-Trichloroethane 50.00 49.33 99 52.40 105 76-124 68-132 6 0-20 1,1,2-Trichloro-1,2,2- 50.00 45.26 91 45.85 92 54-150 38-166 1 0-30 Trifluoroethane 1,1,2-Trichloroethane 50.00 52.08 104 52.05 104 80-120 73-127 0 0-20 Trichloroethene 50.00 47.63 95 50.46 101 79-121 72-128 6 0-20 Trichlorofluoromethane 50.00 53.29 107 55.73 111 72-132 62-142 4 0-20 1,2,3-Tdchloropropane 50.00 50.35 101 50.60 101 75-123 67-131 1 0-20 1,2,4-Trimethylbenzene 50.00 50.37 101 51.63 103 74-128 65-137 2 0-20 1,3,5-Trimethylbenzene 50.00 52.11 104 54.65 10.9 77-131 68-140 5 0-20 Vinyl Acetate 50.00 44.21 88 46.99 94 50-150 33-167 6 0-20 Vinyl Chloride 50.00 44.63 89 47.42 95 63-129 52-140 6 0-20 p/m-Xylene 100.0 97.52 98 103.3 103 80-122 73-129 6 0-20 o-Xylene 50.00 50.77 102 53.54 107 80-128 72-136 5 0-20 Methyl-t-Butyl Ether(MTBE) 50.00 38.26 77 39.04 78 69-123 60-132 2 0-20 Tert-Butyl Alcohol(TBA) 250.0 299.4 120 303.5 121 80-124 73-131 1 0-20 Diisopropyl Ether(DIPE) 50.00 46.70 93 47.74 95 79-121 72-128 2 0-20 Ethyl-t-Butyl Ether(ETBE) 50.00 38.12 76 39.50 79 71-125 62-134 4 0-20 Tert-Amyl-Methyl Ether(TAME) 50.00 43.39 87 44.73 89 70-124 61-133 3 0-20 Ethanol 500.0 536.8 107 504.3 101 53-149 37-165 6 0-24 1,4-Dioxane 500.0 449.5 90 410.9 82 80-150 68-162 9 0-20 RPD:Relative Percent Difference. CL:Control Limits 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 FAX:(714)894-7501 Page 22 of 27 pages Page 13 of 17 eurofins I Quality Control - LCS/LCSD Calscience Eurofins Eaton Analytical, Inc Date Received: 06/06/19 750 Royal Oaks Drive, Suite 100 Work Order: 19-06-0332 Monrovia, CA 91016-3629 Preparation: EPA 5030C Method: EPA 8260B Project: 808532/SOLAKETAH Page 3 of 3 Total number of LCS compounds:75 Total number of ME compounds:1 Total number of ME compounds allowed:4 LCS ME CL validation result:Pass s U O v RPD:Relative Percent Difference. CL:Control Limits 7440 Lincoln Way,Garden Grove,CA 92841-1427 TEL:(714)895-5494 FAX:(714)894-7501 Page 23 of 27 pages Page 14 of 17 eurofins Sample Analysis Summary Report Calscience Work Order: 19-06-0332 Page 1 of 1 Method Extraction Chemist ID Instrument Analytical Location EPA 8260B EPA 5030C 1191 GC/MS PP 2 v U 0 v Location 2:7445 Lampson Avenue,Garden Grove,CA 92841 7440 Lincoln Way,Garden Grove,CA 92841-1427 TEL:(714)895-5494 FAX:(714)894-7501 Page 24 of 27 pages Page 15 of 17 eurofins Glossary of Terms and Qualifiers Calscience Work Order: 19-06-0332 Page 1 of 1 Qualifiers Definition See applicable analysis comment. < Less than the indicated value. > Greater than the indicated value. 1 Surrogate compound recovery was out of control due to a required sample dilution. Therefore,the sample data was reported without further clarification. 2 Surrogate compound recovery was out of control due to matrix interference. The associated method blank surrogate spike compound was in control and,therefore,the sample data was reported without further clarification. 3 Recovery of the Matrix Spike(MS)or Matrix Spike Duplicate(MSD)compound was out of control due to suspected matrix interference.The associated LCS recovery was in control. 4 The MS/MSD RPD was out of control due to suspected matrix interference. 5 The PDS/PDSD or PES/PESD associated with this batch of samples was out of control due to suspected matrix interference. 6 Surrogate recovery below the acceptance limit. 7 Surrogate recovery above the acceptance limit. B Analyte was present in the associated method blank. BU Sample analyzed after holding time expired. BV Sample received after holding time expired. Cl See case narrative. E Concentration exceeds the calibration range. ET Sample was extracted past end of recommended max.holding time. HD The chromatographic pattern was inconsistent with the profile of the reference fuel standard. HDH The sample chromatographic pattern for TPH matches the chromatographic pattern of the specified standard but heavier hydrocarbons were also present(or detected). HDL The sample chromatographic pattern for TPH matches the chromatographic pattern of the specified standard but lighter hydrocarbons were also present(or detected). U J Analyte was detected at a concentration below the reporting limit and above the laboratory method detection limit. Reported value is estimated. JA Analyte positively identified but quantitation is an estimate. ME LCS Recovery Percentage is within Marginal Exceedance(ME)Control Limit range(+/-4 SD from the mean). ND Parameter not detected at the indicated reporting limit. Q Spike recovery and RPD control limits do not apply resulting from the parameter concentration in the sample exceeding the spike concentration by a factor of four or greater. SG The sample extract was subjected to Silica Gel treatment prior to analysis. X %Recovery and/or RPD out-of-range. Z Analyte presence was not confirmed by second column or GC/MS analysis. Solid-Unless otherwise indicated,solid sample data is reported on a wet weight basis,not corrected for%moisture.All QC results are reported on a wet weight basis. Any parameter identified in 40CFR Part 136.3 Table II that is designated as"analyze immediately"with a holding time of<=15 minutes (40CFR-136.3 Table II,footnote 4),is considered a"field"test and the reported results will be qualified as being received outside of the stated holding time unless received at the laboratory within 15 minutes of the collection time. A calculated total result(Example:Total Pesticides)is the summation of each component concentration and/or,if"J"flags are reported, estimated concentration. Component concentrations showing not detected(ND)are summed into the calculated total result as zero concentrations. 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 • FAX:(714)894-7501 Page 25 of 27 pages Submittal Form Date: 6/6/2019 tiff e u rof i n s 'REPORTING REQUIRMENTS:Do Not Combine Reports with any other samples submitted under different Folder Numbersl Eaton Analytical Report&Invoice must have the Folder# 808632 Job#1000014 Re oRrt all quality control data according to Method.Include dates analyzed. Date extracted(if extracted)and Method reference on the report, Results must have Complete data&QC with Approval Signature. Ship �; Pi"' R,� n thy' 'Eurofins CaISc)ence ` ;x 5. ;,. OKI �0Iy:. i��t111.,�.� .,�+ tpjrl p �fl .l ` .t 7440 Lincoln Way � �r �`7' , ��� _ ' � � `�i �� rf'�n'' ��� ;�=��k.� ��:�r.<. ,•;�,.. Y Garden Grove,CA 92641-1432 .�,u{�Sr" 'y' a � F � °a �;'e, i# ';x:..:� 'I,,�,;r^!•bn'?@�:ty �..t .�"�`*•�%t�'t-.; .c{'^''•n h�;<{;( �.,��i, .3+. Y n `"3�; s -S 1� .x^ '•� ta.r, w;:l•; ;i*•4t.. :: ;,..�:.�rip. ��. a � ( .� >t. �'�;4 ;�. .a�i,�,. ..�� �'"�;�r;?�.,ra�'.>•,�?€I r�u :.°rt*��:,,��Nt°�,�;. ��� �..,...., 1�> t. y:, � 3 � 'ter aT>•�,.�♦..��p�,� a.,t;"}�.'�p ��^.c: :t3�. ' t�'r � �'rr..� .r"..:,:,; �'�t..,•;i,,>:., �xti:,":i?:::�'�;:.�. ..};+°"al�.•`.'i.'�iK:.3;id��.,.TL�n'�.sr'PSk:_a.�32;ri��..�;C"Sli...��°�f13?�`�.�::a ;i:��r�+;i•:l�s.,.�'K"'..7ii. Phone:714895-5494 Fax:714894-7501 SOLAKETAH: 966334 ' 19-06-0332 Folder M Report Due: Sub COCM 808532 06/25/2019 99-66911 Use Lab Sample JLS Client Sample 1D for reference only Analysis Requested Date & Time Matrix PWS Systemcode PWSID 201906040128 HPR 06/03/19 1002 DW Sample type: Sample Event: Facility ID: Sample Point ID:(CL SAMPLEPOINTID) Static ID: EPA 8260B @8260B_Super Cals 4848 8260 VOC W Super List cience v -D pie Control Date fp Time 5"J NOTIFICATION REQUIRED IF RECEIVED OUTSIDE OF 0-8 CELSIUS CD CI) �..:. Ifzax l�i�`. b�"l C:l/ Date�o Time R 8 1£t 8 wim k4 ,1 i rn N N. a °'""° '�' i Sample Control Date Time Mg-I t1t141i;i��� Y" v N a.f3� aY_�` 1 � Date Time Page 1 of 1 N 750 Royal Oaks Drive,Suite 100,Monrovia,CA 91016 jei,,(t ,P, Fax(866)988-3757 www.EurofinsLIS.comlEaton ti~ e U rof i n s WORK ORDER NUMBER: Calscience SAMPLE RECEIPT CHECKLIST COOLER / OF CLIENT: DATE: 06 /1 / 2019 - TEMPERATURE: (Criteria: 0.0°C—6.0°C, not frozen except sediment/tissue) Thermometer ID: 8C6 (CF:-0.2°C);Temperature(w/o CF): a_ °C(w/CF): °C; ❑ Blank .❑ Sample ❑ Sample(s)outside temperature criteria(PM/APM contacted by: ) ❑Sample(s)outside temperature criteria but received on ice/chilled on same day of sampling ❑ Sample(s)received at ambient temperature; placed on ice for transport by courier Ambient Temperature: ❑Air ❑ Filter Checked by: CUSTODY SEAL: Cooler ❑ Present and Intact ❑ Present but Not Intact A Not Present ❑ N/A Checked by Sample(s) ❑ Present and Intact ❑ Present but Not Intact of Present ❑ N/A Checked b SAMPLE CONDIT+ON: Yes No N/A Chain-of-Custody(COC)document(s)received with samples................................................... �J ❑ ❑ COC documents)teceived complete ................................................................................. ❑ ❑ ❑Sampling date ❑ Sampling time ❑ Matrix ❑ Number of containers ❑ No analysis requested ❑ Not relinquished ❑ No relinquished date ❑ No relinquished time Sampler's name indicated on COC :................................................................................... ❑ ❑ Sample container labels)consistent with COC ..................................................................... ❑ ❑ r Sample container(s)intact and in good condition ............ Proper containers for analyses requested ........................................................................... ❑ ❑ Sufficient volume/mass for analyses requested ..................................................................... ❑ ❑ 2. Samples received 'Within holding time ................................................................................. ❑ ❑ Aqueous samples for certain analyses received within 15-minute holding time ❑ pH ❑ Residual Chlorine ❑ Dissolved Sulfide ❑ Dissolved Oxygen .............................. ❑ ❑ 39 Proper preservation chemical(s)noted on COC and/or sample container.................................... gr ❑ ❑ Unpreserved aqueous sample(s)received for certain analyses ❑Volatile Organics ❑Total Metals ❑ Dissolved Metals Acid/base preserved samples-pH within acceptable range ..................................................... ❑ ❑ �T Container(s)for certain analysis free of headspace.................................................................. ❑ ❑ p-dolatile Organics ❑ Dissolved Gases(RSK-175) ❑ Dissolved Oxygen (SM 4500) ❑ Carbon Dioxide(SM 4500) ❑ Ferrous Iron(SM 3500) ❑ Hydrogen Sulfide•(Hach) TedlarTm bag(s)free of condensation ................................................................................. ❑ ❑ CONTAINER TYPE, (Trip Blank Lot Number: ) Aqueous:❑VOA ❑VOAna2 ❑ 100PJ ❑ 100PJna2 ❑125AGB ❑125AGBh [I125AGBp ❑125PB ❑125PBznna(pH_9) ❑250AGB O 250CGB ❑250CGBs(pH_2) ❑250PB ❑250PBn(pH_2) ❑500AGB ❑500AGJ ❑500AGJs(pH_2) ❑500PB ❑ 1AGB ❑ 1AGBna2 ❑ 1AGBs(pH_2) ❑1AGBs(O&G)❑ 1PB ❑1PBna(pH_72) ❑ ❑ ❑ Solid:❑4ozCGJ ❑8ozCGJ ❑16ozCGJ ❑Sleeve(_) ❑EnCoreso(__) ❑TerraCores°(_)❑ O ❑ Air:❑TedlarTm ❑Canister ❑Sorbent Tube ❑PUF ❑ Other Matrix( ):❑ ❑ ❑ Container:A=Amber, B=Bottle, C=Clear,E=Envelope,G.=Glass,J=Jar,P=Plastic,and Z=Ziploc/Resealable Bag n� Preservative:b=buffered,f=filtered, h=HCl,n=HNO3,na=NaOH, nag=Na2S203, p=H3PO4. Labeled/Checked by.,: i. P s=H2SO4,u=ultra-pure,x=Na2SO3+NaHSO4.H2O,znna=Zn(CH3CO2)2+NaOH Reviewed by:_72?L_ TEST METHODS Laboratory Analyses The Regional Board allows the District laboratory to use an alternate test method for Total Nitrogen and Total Kjeldahl Nitrogen (TKN). The District uses test method 1-4650-03, developed by United States Geological Service (USGS), for Total Nitrogen. TKN is calculated by the subtraction of Nitrate-N and Nitrite-N from the Total Nitrogen result. The permit specifies that a performance evaluation (PE)test be done annually and the result is within an acceptable range. The report for this year's PE sample follows. Ver. 1 Page 1 of 13 ERA A Waters Company Dan Arce South Tahoe Public Utilities District 1275 Meadow Crest Dr. South Lake Tahoe, CA 96150 USA WP-300 Final Report TM WatR Pollution Pr • ficiency Testing WatRTM Pollution Study Open Date: 01/13/20 Close Date: 02/27/20 Report Issued Date: 03/02/20 Study#:WP-300 Ver. 1 Page 2 of 13 FAA. A Waters Company March 2, 2020 Dan Arce South Tahoe Public Utilities District 1275 Meadow Crest Dr. South Lake Tahoe, CA 96150 Enclosed is your final report for ERA's WP-300 WatRTMPollution Proficiency Testing (PT)study. Your final report \ includes an evaluation of all results submitted by your laboratory to ERA. ` Data Evaluation Protocols:All analytes in ERA's WP-300 WatRTMPollution Proficiency Testing study have been evaluated using the following tiered approach. If the analyte is listed in the most current TNI/NELAP Fields of Proficiency Testing (FoPT)table the evaluation was completed by comparing the reported result to the acceptance limits generated using the criteria contained in the table and the evaluation criteria contained in the 2016 TNI Standard, Volume 3. If the analyte is not included in the TNI/NELAP FoPT table,the reported result has been evaluated using the procedures outlined in ERA's Standard Operating Procedure for the Generation of Performance Acceptance Limits (SOP 730002268). Corrective Action Help:As part of your accreditation(s), you may be required to identify the root cause of any"Not Acceptable" results, implement the necessary corrective actions, and then satisfy your PT requirements by participating in a Supplemental (QuiKTmResponse)or future ERA PT study. ERA's technical staff is available to help your laboratory resolve any technical issues that may be impairing your PT performance and possibly affecting your routine data quality. Our laboratory and technical staff have many years of collective experience in performing the full range of environmental analyses. As part of our technical support, ERA offers QC samples that cari be useful in helping you work through your technical issues. Thank you for your participation in ERA's WP-300 WatRTMPollution Proficiency Testing study. If you have any questions, please contact our Proficiency Testing Department at 1-800-372-0122. Sincerely, Matthew Seebeck Quality Officer attachments 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.com Study#:WP-300 Ver.1 Page 3 of 13 FRA A Waters Company Report Recipient Contact/Phone Number Reporting Type California ELAP Christine Sotelo/916-341-5175 All Analytes Study#:WP-300 Ver.1 Page 4 of 13 OERA A Waters Company WP-300 Definitions & Study Discussion Study Dates: 01/13/20-02/27/20 Report Issued: 03/02/20 WP Study Definitions WP Study Discussion The Reported Value is the value that the laboratory reported ERA's WP-300 WatRTmPollution Proficiency Testing study to ERA. has been reviewed by ERA senior management and certified compliant with the requirements of the 2009 TNI Standard The ERA Assigned Values are compliant with the most and the 2016 TNI Standard,Volume 3,Section 5.9 and the current TNI/NELAP Fields of Proficiency Testing(FoPT)table. criteria contained in the most current TNI/NELAP Fields of A parameter not added to the standard is given an Assigned Proficiency Testing(FoPT)table. Value of"<PTRL"per the guidelines contained in the 2009 TNI Standards. The assigned values are directly traceable to ERA's WP-300 WatRTmPollution study standards were the commercially prepared starting materials used to examined for any anomalies. A full review of all homogeneity, manufacture the PT standards. stability and accuracy verification data was completed. All analytical verification data for all analytes met the acceptance The Acceptance Limits are established per the criteria criteria contained in the 2009 TNI Standard and the criteria contained in the most current TNI/NELAP FoPT table or contained in the most current TNI/NELAP FoPT table. ERA's SOP for the Generation of Performance Acceptance Limits"m as applicable. This report is scored by the criteria in All analytes are included in ERA's A21LA accreditation, the 2016 TNI Standard,Volume 3, instead of by the criteria in certification number 1539.01. the 2009 TNI Standard to which the Proficiency Testing Provider is accredited. This is a planned change and is All activities associated with this proficiency testing study endorsed by the TNI Proficiency Testing Program Executive were performed by Waters/ERA with the exception of those Committee for transition to the 2016 TNI Standard. noted below. The following physical samples/products were manufactured for Waters/ERA by a subcontractor: The Performance Evaluation: Microbiology products with the following catalog numbers: 880,935,079,077,080,595,595A, 576,576A Acceptable = Reported Value falls within the The data submitted by participating laboratories was also Acceptance Limits. examined for study anomalies. There were no anomalies observed during the statistical review of the data. Not Acceptable = Reported Value falls outside the ERA's WP-300 WatRTmPollution study reports shall not be Acceptance Limits. reproduced except in their entirety and not without the permission of the participating laboratories. The report must not be used by the participating laboratories to claim product No Evaluation = Reported Value cannot be evaluated. endorsement by any agency of the U.S.government. The data contained herein are confidential and intended for your use only. Not Reported = No Value reported. If you have any questions or concerns regarding your assessment in ERA's WatRTmPollution Proficiency Testing The Method Description is the method the laboratory reported program, please contact our Proficiency Testing Department to ERA. at 1-800-372-0122. —* ' Study#:WP-300 eCR— Ver.1 Page 5 of 13 OFRA WP-300 Laboratory Exception Report A Waters Company Dan Arce EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 03/02/20 1275 Meadow Crest Dr. Study Dates: 01/13/20-02/27/20 South Lake Tahoe,CA 96150 (530)543-6231 Not Acceptable Evaluations There were no Not Acceptable evaluations for this study. This report is scored by the criteria in the 2016 TNI Standard,Volume 3,instead of by the criteria in the 2009 TNI Standard to which the Proficiency Testing Provider is accredited. This is a planned change and is endorsed by the TNI Proficiency Testing Program Executive Committee for transition to the 2016 TNI Standard. .-.Ei vl 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.com Study#:WP-300 Ver.1 Page 6 of 13 OERA. A Waters Company Final Report Results For Laboratory South Tahoe Public Utilities District 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.com Study#:wP-300 Ver. 1 Page 7 of 13 OF.AA. A Waters Company Final Evaluation Report Study: WP-300 ERA Customer Number: S586001 Laboratory Name: South Tahoe Public Utilities District Inorganic Res ults 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.com Study#:WP-300 Ver.1 Page 8 of 13 OERA WP-300 Final Evaluation Report A Waters Company Dan Arce EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 03/02/20 1275 Meadow Crest Dr. Study Dates: 01/13/20-02/27/20 South Lake Tahoe,CA 96150 (530)543-6231 TNI Reported Assigned Acceptance Performance Analysis Study Study Analyte Analyte Units Value Value Limits Evaluation Method Description Date Z Score Mean Standard Analyst Name Code Deviation WP Minerals(cat#581,lot#P300-506) 1505 Alkalinity as CaCO3 mg/L 49.8 50.7 43.1-58.3 Acceptable SM 2320 B-2011 2011 1/23/2020 0.107 49.5 2.61 Sierra Kortge 1575 Chloride mg/L 74.4 76.0 66.4-85.8 Acceptable EPA 300.02.1 1993 1/23/2020 -0.137 74.7 2.41 BC/DT 1610 Conductivity at 25°C pmhos/cm 453 458 412-504 Acceptable SM 2510 B-20112011 1/23/2020 -0.196 456 14.1 Sierra Kortge 1730 Fluoride mg/L 3.35 3.47 2.81-3.99 Acceptable EPA300.02.1 1993 1/23/2020 -0.210 3.38 0.166 BC/DT 1125 Potassium mg/L 35.2 28.2-42.2 Not Reported 34.4 1.73 1155 Sodium mg/L 71.8 57.4-86.2 Not Reported 70.0 4.03 2000 Sulfate mg/L 33.6 34.4 27.9-39.6 Acceptable EPA 300.02.1 1993 1/2312020 0.261 33.2 1.60 BC/DT 1955 Total Dissolved Solids at 180'C mg/L 300 296 251-341 Acceptable SM 2540 C-20112011 1/24/2020 0.293 296 14.5 SK 1 DT 1950 Total Solids at 105°C mg/L 306 1 261-351 1 Not Reported 304 17.4 WP Hardness(cat#580,lot#P300-507) 1960 Total Suspended Solids mg/L 71.3 57.6-79.9 Not Reported 66.6 3.64 1035 Calcium mg/L 36.8 37.0 31.4-42.6 Acceptable SM 3500-Ca B-2011 2011 1/27/2020 0.498 36.0 1.55 Michel Lieberman 1085 Magnesium mg/L 37.1 31.5-42.7 Not Reported 36.9 1.50 1550 Calcium Hardness as CaCO3 mg/L 91.8 92.4 78.5-106 Acceptable SM 3500-Ca B-2011 2011 1 1/27/2020 0.553 89.7 3.75 Michal Lieberman 1755 Total Hardness as CaCO3 mg/L 247 245 1 208-282 1 Acceptable sM 2-.c-M112011 1/28/2020 0.722 240 9.46 Michal Lieberman WP pH(cat#577,lot#P300-977) 1900 pH S.U. 6.72 1 6.70 1 6.50-6.90 1 Acceptable I sM4500-H.B-20112011 • 1/28/2020 0.353 6.71 1 0.0401 1 Michal Lieberman WP Settleable Solids(cat#883,lot#P300-911) 1965 Settleable Solids mL/L 20 1 18.2 1 14.4-23.6 1 Acceptable I sM 2540 F-20112011' 1/23/2020 0.485 19.2 1 1.551. Sierra Kortge " This report is scored by the criteria in the 2016 TNI Standard,Volume 3,instead of by the criteria in the 2009 TNI Standard to which the Proficiency Testing Provider is accredited. This is a planned change and is endorsed by the TNI Proficiency Testing Program Executive Committee for transition to the 2016 TNI Standard. nceaeoireo °- 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.com Study#:WP-300 Ver.1 Page 9 of 13 OEAA WP-300 Final Evaluation Report A Waters Company Dan Arce EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 03/02/20 1275 Meadow Crest Dr. Study Dates: 01/13/20-02/27/20 South Lake Tahoe,CA 96150 (530)543-6231 TNI Reported Assigned Acceptance Performance Analysis Study Study Analyte Analyte Units Value Value Limits Evaluation Method Description Date Z Score Mean Standard Analyst Name Code Deviation WP Solids Concentrate(cat#4030,lot#P300-4032) 1960 Total Suspended Solids mg/L 96.9 98.9 81.9-109 Acceptable SM 2540 D-2011 2011 1/2312020 0.425 95.6 3.04 Michal Lieberman 1955 Total Dissolved Solids at 180°C mg/L 251 235 190-280 Acceptable SM 2540 C-20112011 1/23/2020 0.264 247 15.5 Sierra Kortge 1950 Total Solids at 105°C mg/L 346 301-391 Not Reported 337 13.5 WP Simple Nutrients(cat#584,lot#P300-505) 1515 Ammonia as N mg/L 3.87 3.88 2.95-4.86 Acceptable EPA 350.1 2 1993 1/24/2020 -0.334 3.97 0.286 Delores Trebotich 1820 Nitrate+Nitrite as N mg/L 5.69 5.65 4.64-6.61 Acceptable SM 4500-NO3 F.2011 2011 1/24/2020 0.313 5.60 0.286 Delores Trebotich 1810 Nitrate as N mg/L .5.69 5.65 4.59-6.69 Acceptable SM 4500-NO3 F-2011 2011 1/24/2020 0.330 5.59 0.292 Delores Trebotich 1870 ortho-Phosphate as P mg/L 3.12 3.11 2.64-3.58 Acceptable SM 4500-P E-2011 2011 1/24/2020 -0.172 3.15 0.176 Michal Lieberman WP Simple Nutrients(cat#584,lot#P300-505) 1515 Ammonia as N mg/L 3.88 2.95-4.86 Not Reported 3.97 0.286 1820 Nitrate+Nitrite as N mg/L 5.80 5.65 4.64-6.61 Acceptable EPA 300.0 2.1 1993 1/23/2020 0.698 5.60 0.286 BC/DT 1810 Nitrate as N mg/L 5.80 5.65 4.59-6.69 Acceptable EPA30002A M3 1/2312020 0.707 5.59 0.292 BC/DT 1870 ortho-Phosphate as P mg/L 3.51 3.11 2.64-3.58 Acceptable EPA 300.0 2.1 1993 1/23/2020 2.05 3.15 0.176 BC/DT WP Complex Nutrients(cat#579,lot#P300-525) 1795 Total Kjeldahl Nitrogen mg/L 30.2 32.0 24.2-38.4 Acceptable USGS 03-4174 2/4/2020 -0.494 31.1 1.85 Delores Trebotich 1910 Total phosphorus as P mg/L 7.90 8.24 6.87-9.52 Acceptable SM 4500-P E-2011 2011 2/1/2020 -0.707 8.18 0.393 Sierra Kortge WP Nitrite(cat#888,lot#P300-770) 1840 Nitrite as N mg/L 2.36 2.30 1.97-2.64 Acceptable EPA 300.02.1 1993 1/2312020 0.400 2.31 1 0.120 BC/DT WP Nitrite(cat#888,lot#P300-770) 1840 NitriteasN mg/L 2.21 2.30 1.97-2.64 Acceptable SM4500-NWF-20112011 1/23/2020 -0.855 2.31 0.120 BrianChernago This report is scored by the criteria in the 2016 TNI Standard,Volume 3,instead of by the criteria in the 2009 TNI Standard to which the Proficiency Testing Provider is 's accredited. This is a planned change and is endorsed by the TNI Proficiency Testing Program Executive Committee for transition to the 2016 TNI Standard. FA-CC neoi�eol - 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.com Study#:WP-300 Ver.1 Page 10 of 13 OFRA WP-300 Final Evaluation Report A Waters Company Dan Arce EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 03/02/20 1275 Meadow Crest Dr. Study Dates: 01/13/20-02/27/20 South Lake Tahoe,CA 96150 (530)543-6231 TNI Reported Assigned Acceptance Performance Analysis Stud Standard Analyst Name y Study Analyte Analyte Units Method Description Z Score Code Value Value Lim Evaluation Date Mean Deviation WP Nitrite(cat#888,lot#P300-770) 1840 Nitrite as N mg/L 2.25 1 2.30 1 1.97-2.64 Acceptable I SM 4500-ND2 B-2011 2011 1/23/2020 -0.521 1 2.31 0.120 Sierra Kortge WP Demand(cat#578,lot#P300-516) 1530 BOD mg/L 81.7 79.9 42.6-117 Acceptable SM 5210 B-2011 2011 1/28/2020 -0.0195 81.9 12.8 Michal Lieberman 1555 CBOD mg/L 72.4 33.2-112 Not Reported 75.6 13.8 1565 COD mg/L 130 102-154 Not Reported 130 9.53 2040 TOC mg/L 51.4 42.8-59.5 Not Reported 52.1 3.33 WP Dissolved Oxygen(cat#212,lot#P300-213) 1880 Oxygen,Dissolved mg/L 16.2 1 16.9 13.4-20.3 Acceptable SM4500-o c-2011 2011, 1/28/2020 -0.585 16.9 1.14 Sierra Kortge WP Turbidity(cat#893,lot#P300-777) 2055 Turbidity NTU 3.7 1 4.05 2.98-5.08 Acceptable EPA 180.1 2 1993 1/28/2020 -1.09 3.99 0.264 Sierra Kortge WP Total Residual Chlorine(cat#587,lot#P300-501) 1945 Free Residual Chlorine mg/L 0.64 0.621 0.469-0.770 Acceptable SM4500-clD-20112011 1/29/2020 0.380 0.617 0.0595 1 Michal Lieberman 1940 Total Residual Chlorine mg/L 0.64 0.628 0.475-0.778 Acceptable SM4500-CID-20112.11 1 1/29/2020 -0.295 0.652 0.0410 1 Michal Lieberman WP Total Residual Chlorine(cat#587,lot#P300-501) 1945 Free Residual Chlorine mg/L 0.68 0.621 0.469-0.770 Acceptable sM450o-ac-20112011 1 1/29/2020 1.05 0.617 0.0595 Michal Lieberman 1940 Total Residual Chlorine mg/L 0.68 0.628 0.475-0.778 Acceptable SM4500-CIG-2011 2011 1 1/29/2020 0.682 0.652 0.0410 Michal Lieberman WP Total Residual Chlorine(cat#587,lot#P300-501) 1945 Free Residual Chlorine mg/L 0.66 0.621 0.469-0.770 Acceptable sM KCl40- c-2011 21111 1/29/2020 0.716 0.617 0.0595 Michal Lieberman 1940 Total Residual Chlorine mg/L 0.66 0.628 1 0.475-0.778 Acceptable SM4500-CIG-Ml12011 1 1/29/2020 0.194 0.652 0.0410 Michal Lieberman This report is scored by the criteria in the 2016 TNI Standard,Volume 3,instead of by the criteria in the 2009 TNI Standard to which the Proficiency Testing Provider is accredited. This is a planned change and is.endorsed by the TNI Proficiency Testing Program Executive Committee for transition to the 2016 TNI Standard. accnemteo 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.com Study#:WP-300 Ver.1 Page 11 of 13 OFRA. A Waters Company Final Evaluation Report Study: WP-300 ERA Customer Number: S586001 Laboratory Name: South Tahoe Public Utilities District Microbiology Results 16341 Table Mountain Pkwy•Golden, CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.com study#:wP-300 Ver.1 Page 12 of 13 OERA WP-300 Final Evaluation Report A Waters Company Dan Arce EPA ID: CA00366 Lab Director ERA Customer Number: S586001 South Tahoe Public Utilities District Report Issued: 03/02/20 1275 Meadow Crest Dr. Study Dates: 01/13/20-02/27/20 South Lake Tahoe,CA 96150 (530)543-6231 TNI Reported Assigned Acceptance Performance Analysis Study Study Analyte Analyte Units Value Value Limits Evaluation Method Description Date Z Score Mean Standard Analyst Name Code Deviation WP WasteWatRM Coliform MicrobETm(cat#576,lot#P300-083) 2500 Total Coliforms(MF) CFU/100mL 833 392-1050 Not Reported 641 109 2530 Fecal Coliforms(MF) CFU/100mL 548 93.0-1040 Not Reported 312 159 2525 E.coli(MF) CFU/100mL 833 104-1700 Not Reported 421 266 2500 Total Coliforms(MPN) MPN/100mL 1120 780 489-2170 Acceptable Coldert®®Ouantl-Tray® 1/21/2020 0.0148 1030 280 ML/BC 2530 Fecal Coliforms(MPN) MPN/100mL 566 180-1430 Not Reported 508 208. 2525 E.coli(MPN) MPN/100mL 1120 780 513-2160 Acceptable Colilert® 1/21/2020 0.0109 1050 275 ML/BC Per Section 6.4.3 a of the 2009 TNI Standard,"The assigned values for quantitative microbiology analytes shall be equal to the mean of the assigned value verification and/or homogeneity testing per Sections 7.1 and 7.2". The final acceptance limits are derived from the calculated study mean and study standard deviation from laboratory-reported results. Disagreement between the assigned values and study means/acceptance limits are due to the inherent variability of microbiology methods and differences in the methods used by ERA and participant laboratories. For quantitative microbiology analytes,the assigned value is not used in the evaluation of laboratories. This report is scored by the criteria in the 2016 TNI Standard,Volume 3,instead of by the criteria in the 2009 TNI Standard to which the Proficiency Testing Provider is accredited. This is a planned change and is endorsed by the TNI Proficiency Testing Program Executive Committee for transition to the 2016 TNI Standard. r neorreol a "° 16341 Table Mountain Pkwy•Golden,CO 80403•800.372.0122•303.431.8454•fax 303.421.0159•www.eragc.com Study#:WP-300 Ver.1 Page 13 of 13 CERTIFICATE OF EXCELLENCE In recognition of the quality of your laboratory in proficiency testing for WP-300 South Tahoe Public Utilities District is issued this certificate of achievement by ERA. This laboratory has been recognized as a Laboratory of Excellence for achieving 100% acceptable data in this study which included 709 participating laboratories. This achievement is a demonstration of the superior quality of the laboratory in evaluation of the standards listed below. Complex Nutrients Demand Dissolved Oxygen Hardness Minerals Nitrite pH Settleable Solids Simple Nutrients Solids Concentrate Total Residual Chlorine Turbidity WasteWatR11 Coliform MicrobETM Matthew Seebeck Quality Officer S586001