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STPUD 1st Quarter 2020 Reclamation Permit Monitoring ReportSouth Tahoe Public Utility District May 7, 2020 Patty Kouyoumdjian California Regional Water Quality Control Board -Lahontan Region 2501 Lake Tahoe Boulevard South Lake Tahoe, CA 96150 RB6-Lahontan@waterboards .ca.gov 1275 Meadow Crest Drive• South Lake Tahoe• CA 96150-7401 Phone 530 544-64 74 • Fax 530 541-0614 • www.stpud.us Subject: Reclamation Permit Monitoring Report, 1st Quarter 2020 Ms . Kouyoumdjian, Enclosed is the South Tahoe Public Utility District's 2020 1st quarter self-monitoring report for January through March 2020. The District is reporting as required by the Wastewater Reclamation Permit (Board Order R6T-2004-0010A3, WDID No. 6A095900700). Wastewater Reclamation Permit (Board Order R6T-2004-0010A1). The effluent met all the requirements set forth in the Board Order for this quarter; there were no violations. Emergency Retention Basin (ERB) No wastewater was pumped to the ERB during this quarter. There was no wastewater remaining in the ERB on March 31, 2020. The ERB was inspected on February 10, 2020, February 20, 2020 and March 18, 2020; the reports are attached. Export Pipeline The District's Final Effluent Export Line was inspected on February 12, 2020. No damage to the pipe was found. Wastewater Reclamation Permit Compliance This monitoring program provides for continuous surface water monitoring, except during the months of December, January and February when only SW-01, SW-05, and SW-06 are monitored . Operational Problems or Major Maintenance Activities LRWQCB -Page 2 Modifications and operational problems occurring during this quarter are detailed in the section titled Operational Problems and Major Maintenance Activities in this report. Notes Sampling and analysis problems for offsite sample locations are listed in the Sample Comments section. Certification I certify under penalty of law that this document and all attachments were prepared under my direction or supervision following a system designed to ensure that qualified personnel properly gather and evaluate the information submitted. Based on my knowledge of the person(s) who manage the system or those directly responsible for data gathering, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment. If you have any questions or require additional information, please contact me at the number provided above. Sincerely, D:\Lahonlan\Reports\2020 1 sl Quarter Report.doc LRWQCB -Page 3 Enclosures: Monthly Report Summary Operational problems and maintenance activities. Wastewater Treatment plant Permit Compliance Record Emergency Retention Basin (ERB) Inspection report . Export Pipeline Inspection Report: Sample site locations Map of Alpine County sample sites Harvey Place Reservoir recycled water storage Final Effluent Trihalomethanes test results Alpine County and Tahoe Basin Surface waters, Groundwaters, and HPR HPR Blue Green Algae results Alpine County and Tahoe Basin groundwater elevations Alpine County soils Sample Comments Tahoe Basin ERB Monitoring Wells Purge Records Alpine County Monitoring Wells Purge Records Photos of Irrigation ditch flows Total pages pdf: Lahontan Regional Water Quality Control Board LRWQCB Executive Officer -Patty Kouyomdjian LRWQCB Senior Engineer -Robert Tucker Alpine County Board of Supervisors Alpine County Health Department -Dr. Richard Johnson Alpine County Health Department -Dennis Lampson Washoe Tribe Woodfords Community Council Chairman -Jim Irvin Washoe Tribe Environmental Specialist -Coralee Ditman Nevada Division of Environmental Protection -Birgit Widegren Nevada Division of Environmental Protection -Jean Stone STPUD General Manager-John Thiel STPUD Alpine County Operations -Jim Hilton STPUD Manager of Operations -Jeff Lee STPUD Operations Chief Plant Operator -Chris Siano STPUD Hydrogeologist-lvo Bergsohn STPUD Laboratory Director -Dan Arce STPUD Contract Commission -Dr. Richard Harvey D:\Lahontan\Reports\2020 1st Quarter Report.doc Pages 1 6 1 6 1 2 3 2 19 7 1 1 1 1 3 10 0 65 Operational Problems and Major Maintenance Activities January -March 2020 Wastewater Treatment Facilities • Construction of the District's plant wide Emergency Generator System was largely completed. The 1.5 MW Generator and new 600 hp. Emergency Pump Motor are in place and operational. Installation of new above ground gasoline and diesel Storage Tank is delayed due recent restrictions. • On January 15 , 2020, an Air Header in Aeration Basin #1 blew out. Aeration Basin #2 was put into service and has been in use since . Aeration Basin #1 has been repaired. • On March 17, 2020 The District formally declared an emergency due to the Covid-19 epidemic. Operations and Maintenance staff at the District are now segregated into two groups which do not work together. The Waste Water Treatment Plant remains fully operational and in full compliance with monitoring requirements. Frequency of testing has not been affected. Wastewater Conve yance System • Sewer Pump Stations o Pump #2 at Trout Creek Sewer Pump Station was pulled and rags were removed from the impeller. This was done repeatedly during at the beginning of this quarter. o Wear Rings at Pump #2 at Al Tahoe Sewer Pump Station were replaced. o Spare Pump Element was rebuilt at Upper Truckee Sewer Pump Station. o Ball Check Valves were removed and replaced at Ponderosa Sewer Pump Station . o Pump #2 at Trout Creek Sewer Pump Station was removed and replaced with Vaughan Chopper Pump. o Vent on Tank #1 at Luther Pass Pump Station was rebuilt. o Pump #1 at Bijou Sewer Pump Station was pulled in order to fix leaking seal. • Collection System o Only regular maintenance activities were performed on the collection system. Alpine Co un ty Disposa l Facilities • There were no modifications or additions to, or any major maintenance or construction conducted on, or any major problems occurring at the disposal facilities in Alpine County for January thru March , 2020. Page 1 SOUTH TAHOE PUBLIC UTILITY DISTRICT 3/11/2020 WASTEWATER TREATMENT PLANT MONTHLY REPORT 9:27 AM January 2020 <--------------------Flow MG 0-----------> BOD ss 2-Hr Peak Pond Pond Precipitation mg/L mg/L Date Da Inf Inf Eff Return Inf Inch T e Raw Final Raw Final 1/1/2020 Wed 3.99 5.6 4.76 1/2/2020 Thu 3.88 5.2 4.01 1/3/2020 Fri 3.86 5.0 4.07 1/4/2020 Sat 3.83 5.4 3.89 346 9.7 224 3.8 1/5/2020 Sun 3.46 4.9 3.72 1/6/2020 Mon 3.01 3.9 3.23 1/7/2020 Tue 2.98 3.7 3.22 1/8/2020 Wed 2.90 3 .7 3.25 368 7.1 258 3.9 1/9/2020 Thu 3.00 3.9 3.30 1/10/2020 Fri 3.18 4.1 3.62 1/11/2020 Sat 3.39 4.5 3.18 335 7.0 168 2.9 1/12/2020 Sun 3.20 4.7 3.53 1/13/2020 Mon 2.91 4.1 3.23 1/14/2020 Tue 2.75 3.4 2.94 0.03 Snow 1/15/2020 Wed 2.74 3.4 3.17 300 8.1 184 3.9 1/16/2020 Thu 2.74 3.4 2.89 0.48 Snow 1/17/2020 Fri 2.97 3.9 3.24 0.03 Snow 1/18/2020 Sat 3.64 4.9 4.01 312 10.1 255 4.2 1/19/2020 Sun 3.72 5.2 3.75 1/20/2020 Mon 3.23 4.8 3.92 1/21/2020 Tue 2.77 3.6 3.21 0.02 Snow 1/22/2020 Wed 2.79 3.5 3.14 264 8.1 175 3.0 1/23/2020 Thu 2.83 3.5 3.39 0.01 Snow 1/24/2020 Fri 3.15 3.9 3.29 0.04 Snow 1/25/2020 Sat 3.50 4.6 3.57 311 13.5 200 4.3 1/26/2020 Sun 3.53 5.1 4.13 0.20 Rain 1/27/2020 Mon 2.99 3.8 3.47 1/28/2020 Tue 2.82 3.6 3.05 1/29/2020 Wed 2.81 3.5 2.99 NV NV 219 6.1 1/30/2020 Thu 2.83 3.5 3.06 1/31/2020 Fri 3.07 3.8 3.00 Permit Max 7.7 45 60 Permit Min Permit Ave 30 30 Total 98.47 130.1 107.23 0.00 0.00 0.81 2236 63.5 1683 32.0 Maximum 3.99 5.6 4.76 0.00 0.00 0.48 368 13.5 258 6.1 Minimum 2.74 3.4 2.89 0.00 0.00 0.01 264 7.0 168 2.9 Average 3.18 4.2 3.46 0.12 319 9.1 210 4.0 # Tests 31 31 31 0 0 7 7 7 8 8 Page 2 SOUTH TAHOE PUBLIC UTILITY DISTRICT 3/11/2020 WASTEWATER TREATMENT PLANT MONTHLY REPORT 9:27 AM January 2020 pH Chlorine <Final Total Coliforms> Total Nitrogen TDS Units mg/L MPN/100 ml mg/L mg/L Date Da Raw Final Final Total ?day-Median Raw Final Raw Final 1/1/2020 Wed 7.47 7 .85 7 .7 < 1 < 1 1/2/2020 Thu 7 .50 7.85 6.2 < 1 < 1 1/3/2020 Fri 7.41 7 .89 5.8 < 1 < 1 1/4/2020 Sat 7.54 7.86 5.7 < 1 < 1 1/5/2020 Sun 7.44 7.88 6.3 < 1 < 1 52 .6 40 .9 1/6/2020 Mon 7.56 7.83 7.1 < 1 1/7/2020 Tue 7.53 7.90 6.8 < 1 < 1 1/8/2020 Wed 7.54 7 .96 4.0 1 < 1 312 282 1/9/2020 Thu 7.48 7.75 6.1 < 1 1/10/2020 Fri 7.49 7.82 6.1 < 1 < 1 1/11/2020 Sat 7.57 7.85 6.2 < 1 < 1 1/12/2020 Sun 7.50 7.85 6 .2 < 1 < 1 1/13/2020 Mon 7.40 7.84 5.2 < 1 < 1 44.5 37.7 1/14/2020 Tue 7.24 7.88 6 .8 < 1 < 1 1/15/2020 Wed 7.46 7.89 5 .7 < 1 < 1 1/16/2020 Thu 7.40 7.85 8.7 < 1 < 1 1/17/2020 Fri 7.58 7.79 6.9 < 1 < 1 1/18/2020 Sat 7.55 7.76 6.0 < 1 < 1 1/19/2020 Sun 7.54 7.84 5.2 < 1 < 1 1/20/2020 Mon 7.52 7.86 5.5 < 1 < 1 1/21/2020 Tue 7.39 7.88 5.5 < 1 < 1 1/22/2020 Wed 7.48 7.81 9.3 < 1 < 1 45.9 34.9 282 288 1/23/2020 Thu 7.53 7.76 5.0 < 1 < 1 1/24/2020 Fri 7.59 7.88 5.6 < 1 < 1 1/25/2020 Sat 7.53 7.84 5.3 < 1 < 1 1/26/2020 Sun 7.41 7.82 4.7 < 1 < 1 1/27/2020 Mon 7.43 7.73 5.1 1 < 1 1/28/2020 Tue 7.57 7.80 5.4 < 1 < 1 1/29/2020 Wed 7.47 7.91 7.6 < 1 < 1 45.6 36.5 1/30/2020 Thu 7.53 7.76 9 .6 < 1 < 1 1/31/2020 Fri 7.50 7.77 4.4 < 1 < 1 Permit Max 9.00 23 Permit Min 6.50 Permit Ave Total 232.15 242.96 191.7 31 31 188.6 150.0 594 570 Maximum 7.59 7.96 9.6 1 1 52.6 40.9 312 288 Minimum 7.24 7.73 4.0 < 1 < 1 44.5 34.9 282 282 Average 7.49 7.84 6.18 < 1 < 1 47.2 37 .5 297 285 # Tests 31 31 31 31 31 4 4 2 2 Page 1 SOUTH TAHOE PUBLIC UTILITY DISTRICT 3/27/2020 WASTEWATER TREATMENT PLANT MONTHLY REPORT 9:31 AM February 2020 <--------------------Fl ow M G 0--------------------> BOD ss 2-Hr Peak Pond Pond Precipitation mg/L mg/L Date Da Inf Inf Eff Return Inf Inch T e Raw Final Raw Final 2/1/2020 Sat 3.51 4.5 4.12 NV NV 219 6.6 2/2/2020 Sun 3.35 4.8 3.86 0.01 Snow 2/3/2020 Mon 2.93 3.8 3.17 2/4/2020 Tue 2.80 3.5 3.11 NV NV 184 11 .3 2/5/2020 Wed 2.78 3.4 2.88 2/6/2020 Thu 2.81 3.6 3.17 2/7/2020 Fri 3.08 3 .6 3.27 2/8/2020 Sat 3.54 3.4 3.66 NV NV 177 13 .0 2/9/2020 Sun 3.36 4.8 3.46 2/10/2020 Mon 2.94 3.9 3.55 252 25.4 203 14.8 2/11/2020 Tue 2.76 3.5 3 .00 2/12/2020 Wed 2.73 3.4 3.03 2/13/2020 Thu 2.84 3.4 3 .03 257 22.6 159 14 .8 2/14/2020 Fri 3.17 4.0 2.99 2/15/2020 Sat 3.71 4.8 3.50 2/16/2020 Sun 3.89 5.1 4.24 368 21.3 238 12.0 2/17/2020 Mon 3.46 5.0 4.10 2/18/2020 Tue 3 .14 4.0 3.75 291 25.9 214 18.1 2/19/2020 Wed 3.06 3.9 3.47 2/20/2020 Thu 3.10 3.9 3.30 2/21/2020 Fri 3.32 4.1 3.18 2/22/2020 Sat 3.63 4.9 3.22 310 12.9 212 9.7 2/23/2020 Sun 3.37 5.0 4.28 2/24/2020 Mon 3.56 3.9 3.40 2/25/2020 Tue 2.85 3.6 2.97 2/26/2020 Wed 2.87 3.5 3.27 278 16.9 244 16.3 2/27/2020 Thu 2.92 3 .7 3.04 2/28/2020 Fri 3.13 3.8 3.07 2/29/2020 Sat 3.53 4 .6 3.56 273 12.2 186 8.6 Permit Max 7.7 45 60 Permit Min Permit Ave 30 30 Total 92.14 117.4 98.65 0.00 0.00 0.01 2029 137.2 2036 125.2 Maximum 3.89 5.1 4.28 0.00 0.00 0.01 368 25.9 244 18.1 Minimum 2.73 3.4 2.88 0.00 0.00 0.01 252 12.2 159 6.6 Average 3.18 4.0 3.40 0.01 290 19.6 204 12.5 # Tests 29 29 29 0 0 7 7 10 10 Page 2 SOUTH TAHOE PUBLIC UTILITY DISTRICT 3/27/20 20 WASTEWATER TREATMENT PLANT MONTHLY REPORT 9:3 1 A M February 2020 pH Chlorine <Final Total Coliforms> Tota l Nitrogen TDS Units mg/L MPN/100 ml mg/L mg/L Date Da Raw Final Final Total ?day-Median Raw Final Raw Final 2/1/2020 Sat 7.47 7.78 6.3 < 1 < 1 2/2/2020 Sun 7.56 7.81 6 .2 < 1 < 1 2/3/2020 Mon 7.56 7.91 6 .1 < 1 < 1 2/4/2020 Tue 7.57 7.89 6.4 < 1 < 1 43.4 35 .2 2/5/2020 Wed 7.50 7.76 5 .5 < 1 < 1 288 277 2/6/2020 Thu 7.58 7.89 6.3 < 1 < 1 2/7/2020 Fri 7.53 7.73 7.3 < 1 < 1 2/8/2020 Sat 7.55 7.86 7.5 < 1 < 1 2/9/2020 Sun 7.51 7.97 7 .7 < 1 < 1 2/10/2020 Mon 7 .33 7.78 8 .2 < 1 < 1 42 .1 35 .8 2/11/2020 Tue 7.43 7.85 6 .3 < 1 2/12/2020 Wed 7.48 7.71 7.7 < 1 < 1 2/13/2020 Thu 7.50 7.83 8.4 < 1 < 1 2/14/2020 Fri 7.55 7 .. 90 7 .6 < 1 < 1 2/15/2020 Sat 7.61 7.90 7.3 < 1 < 1 2/16/2020 Sun 7.57 7.90 7.7 < 1 < 1 2/17/2020 Mon 7.45 7.79 7.4 < 1 < 1 2/18/2020 Tue 7.51 7.91 8.1 < 1 < 1 282 304 2/19/2020 Wed 7 .55 7.91 6.3 < 1 < 1 44.1 34.9 2/20/2020 Thu 7.44 7.80 7.3 < 1 < 1 2/21/2020 Fri 7.43 7.81 7.8 < 1 < 1 2/22/2020 Sat 7.38 7.76 7.0 < 1 < 1 2/23/2020 Sun 7.41 7.78 6.5 < 1 < 1 2/24/2020 Mon 7.49 7.86 8.9 < 1 < 1 2/25/2020 Tue 7.41 7.81 6.4 1 < 1 43.3 34.9 2/26/2020 Wed 7.41 7.78 6.4 < 1 < 1 2/27/2020 Thu 7 .51 7.77 6.1 < 1 < 1 2/28/2020 Fri 7.48 7 .80 8.6 < 1 < 1 2/29/2020 Sat 7 .51 7 .80 6.8 < 1 < 1 Permit Max 9 .00 23 Permit Min 6.50 Permit Ave Total 217.28 219.15 206 .1 29 29 172.9 140.8 570 581 Maximum 7.61 7.97 8.9 1.0 1.0 44.1 35.8 288 304 Minimum 7.33 7.71 5.5 < 1 < 1 42.1 34.9 282 277 Average 7.49 7 .83 7.11 < 1 < 1 43.2 35.2 285 291 # Tests 29 28 29 29 29 4 4 2 2 Page 1 SOUTH TAHOE PUBLIC UTILITY DISTRICT 5/7/2020 WASTEWATER TREATMENT PLANT MONTHLY REPORT 1:59 PM March 2020 <-------Flow MGD---------> BOD ss 2-Hr Peak Pond Pond Precipitation mg/L mg/L Date Da Inf Inf Eff Return Inf Inch T e Raw Final Raw Final 3/1/2020 Sun 3.22 4.5 4.08 0.17 Snow 3/2/2020 Mon 2.92 3.7 3.43 3/3/2020 Tue 2.84 3.5 3.18 268 9.0 191 7.4 3/4/2020 Wed 2.81 3.6 3.18 3/5/2020 Thu 2 .92 3.6 3.46 3/6/2020 Fri 3.07 3.7 3.11 3/7/2020 Sat 3.41 4.5 3.15 289 10.5 211 6.7 3/8/2020 Sun 3.16 4.5 3.55 3/9/2020 Mon 2.92 3.7 3.77 3/10/2020 Tue 2 .91 3.5 3.11 270 10.3 198 6.9 3/11/2020 Wed 2.87 3.5 3.11 3/12/2020 Thu 2.98 3.7 3.03 3/13/2020 Fri 3.09 3.7 3.36 3/14/2020 Sat 3.43 4.4 3.56 0.42 Snow 295 6.5 230 4.0 3/15/2020 Sun 3.22 4.4 3.90 0.44 Snow 3/16/2020 Mon 3.06 3.7 3.36 0.46 Snow 3/17/2020 Tue 2.96 4.2 3.32 0.01 Snow 3/18/2020 Wed 2.84 3.7 3.01 0.04 Snow 234 4.7 186 3.5 3/19/2020 Thu 2.86 3.8 3.02 0.05 Snow 3/20/2020 Fri 2.90 3.8 3.39 3/21/2020 Sat 2.99 4.0 3.26 254 4.9 191 3.7 3/22/2020 Sun 3.01 4.2 3.21 3/23/2020 Mon 2.90 3.9 2.93 236 4.9 154 2.3 3/24/2020 Tue 2.91 3.9 3.47 0.03 Snow 3/25/2020 Wed 2.86 3.8 3.28 0.02 Snow 3/26/2020 Thu 2.82 3.6 3.14 0.03 Snow 3/27/2020 Fri 2.83 3.7 3.11 222 6.2 156 3.5 3/28/2020 Sat 2.87 4.0 2.93 3/29/2020 Sun 2.88 4.0 3.53 3/30/2020 Mon 2.82 3.9 3.24 3/31/2020 Tue 2.97 3.9 3.40 Permit Max 7 .7 45 60 Permit Min Permit Ave 30 30 Total 92.25 120.6 102.58 0 .00 0.00 1.67 2068 57.0 1517 37.8 Maximum 3.43 4.5 4.08 0 .00 0.00 0.46 295 10.5 230 7.4 Minimum 2.81 3.5 2.93 0 .00 0.00 0.01 222 4.7 154 2.3 Average 2.98 3 .9 3.31 0.17 259 7.1 190 4.7 # Tests 31 31 31 0 0 10 8 8 8 8 Page 2 SOUTH TAHOE PUBLIC UTILITY DISTRICT 51712020 WASTEWATER TREATMENT PLANT MONTHLY REPORT 2:14 PM March 2020 pH Chlorine <Final Total Coliforms> Total Nitrogen TDS Units mg/L MPN/100 ml mg/L mg/L Date Oa Raw Final Final Total ?day-Median Raw Final Raw Final 3/1/2020 Sun 7.50 7.75 6.4 < 1 < 1 3/2/2020 Mon 7.40 7.90 7.5 < 1 < 1 3/3/2020 Tue 7.39 7.90 7.0 < 1 < 1 40 .8 32.5 276 267 3/4/2020 Wed 7.41 7.82 9.3 < 1 < 1 3/5/2020 Thu 7.45 7.79 6 .1 < 1 < 1 3/6/2020 Fri 7.51 7 .89 6 .3 < 1 < 1 3/7/2020 Sat 7.59 7.90 6 .9 < 1 < 1 3/8/2020 Sun 7.41 7.82 6 .6 < 1 < 1 3/9/2020 Mon 7.44 7.76 6.0 < 1 < 1 3/10/2020 Tue 7.50 7.91 6.3 < 1 < 1 3/11/2020 Wed 7.43 7.84 6.8 < 1 < 1 40.9 30.8 3/12/2020 Thu 7.48 7.85 6.9 < 1 < 1 3/13/2020 Fri 7.39 7.81 6.7 < 1 < 1 3/14/2020 Sat 7.45 7.81 6.8 < 1 < 1 3/15/2020 Sun 7.52 7.81 5.6 < t < 1 3/16/2020 Mon 7.51 7 .83 6.5 38.5 29.9 3/17/2020 Tue 7.48 7 .83 5 .7 < 1 < t 3/18/2020 Wed 7 .53 7 .91 6.5 < 1 < 1 262 253 3/19/2020 Thu 7.49 7.74 7.1 < 1 < 1 3/20/2020 Fri 7.40 7.75 6.4 < 1 < 1 3/21/2020 Sat 7.45 7.80 6.5 < 1 < 1 3/22/2020 Sun 7 .49 7.76 5.1 < 1 < 1 3/23/2020 Mon 7.48 7.84 8.4 < 1 < 1 39 .7 26.8 248 247 3/24/2020 Tue 7.46 7.79 6.5 < 1 < 1 3/25/2020 Wed 7.49 7.76 6.4 < 1 < 1 3/26/2020 Thu 7 .61 7.89 6.7 < 1 < 1 3/27/2020 Fri 7.46 7.82 6 .6 < 1 < 1 3/28/2020 Sat 7.49 7 .79 8.4 < 1 < 1 3/29/2020 Sun 7.41 7.83 7.0 < 1 < 1 3/30/2020 Mon 7 .50 7.78 5 .8 < 1 < 1 38 .5 26 .7 3/31/2020 Tue 7.43 7.72 7 .1 < 1 < 1 Permit Max 9.00 23 Permit Min 6 .50 Permit Ave Total 231.55 242.40 207.9 30 30 198.4 146.7 786 767 Maximum 7 .61 7.91 9.3 < 1 < 1 40.9 32.5 276 267 Minimum 7.39 7 .72 5 .1 < 1 < 1 38.5 26.7 248 247 Average 7.47 7.82 6 .71 < 1 < 1 39 .7 29.3 262 256 # Tests 31 31 31 30 30 5 5 3 3 Page 3 SOUTH TAHOE PUBLIC UTILITY DISTRICT WASTEWATER TREATMENT PLANT NUMBER OF VIOLATIONS 2020 Parameter # Tests Jan Feb Mar Apr Mal Jun Jul AU£! Sep Oct Nov Dec Total Compliance Total Plant Inflow; 7.7 MGD; Dry Weather 91 0 0 0 100 .0% 2-Hour Peak Inflow; 18.5 MGD 91 0 0 0 100 .0% BOD, 30 Day Ave: 30 mg/L 3 0 0 0 100 .0% BOD, Max: 45 mg/L 22 0 0 0 100 .0% SS , 30 Day Ave : 30 mg/L 3 0 0 0 100.0% SS , Max: 60 mg/L 26 0 0 0 100.0% pH , 6.5 to 8.5 90 0 0 0 100.0% Total Coliforms , Max: 240 MPN/100 ml 90 0 0 0 100.0% Total Coliforms , 7-day Median: 23 MPN 90 0 0 0 100 .0% Total 506 0 0 0 0 0 0 0 0 0 0 0 0 0 100 .0% South Tahoe Public Utility District ERB Inspection Date of Inspection: 2.. • ;, 2...Qc () Performed by: _C_·_o_L_1 i-J_-________ _ Inspection Procedure: Walk the entire crest of the ERB looking for any problems. Pay particular attention to the condition of the liner . Note the location of any needed repairs on the map on the next page . If the basin is empty and free of snow, walk the entire interior tow checking for liner failures. Scan the entire floor for breaches of any kind. Rodent activity: __ G-"'-"pro=._ ________ _ Vegetation control: G-~ oo -~----------- Overflow Spillway: -~-=-'))........._Q _________ _ Stairs North: "I \~ ---'--"-'----------- Stairs South: N -~ --'----'----------- Top Fill Structure North: --=(5.-o=---o=--D _________ _ Top Fill Structure South: -~=--..,=--o=--1~ _________ _ Drain Valve North: &oon ------------- Drain Valve South: Perimeter Fence & Gates: _4,.=::rl::?~:....__ ________ _ Valve House: Comments : rs ,,• f?Ff'A,Rs Date of Inspection: '2... · \ 'D · 2. o <,a, Performed by: ( ( ( ( !' -+ + + + + + Valve House -+ -+ + + + :-+ + + -=-... + ... -... -... + + + ~1 -+ + + + + South ?Grid ,-+ + + + J-+ ,-+ + -+ + + + + + -+ + + + + + t t t t !, !, !' + + + + + + + + I ., !' + + + + + + + !, !' + + + + + + + !, r r + + - + - + - + - + + - + + - + + - + + - + + -,. + + - + - + - + + - l !, South Tahoe Public Utility District ERB Inspection Date of Inspection: 2 · 2-0 -Z-oL .. :,: Perlormed by: Inspection Procedure: Walk the entire crest of the ERB looking for any problems. Pay particular attention to the condition of the liner. Note the location of any needed repairs on the map on the next page. If the basin is empty and free of snow, walk the entire interior tow checking for liner failures. Scan the entire floor for breaches of any kind. Rodent activity: Vegetation control: ___.6""""~_,.q=g· ... :') ________ _ Overflow Spillway: _ __.aG __ -JCJ_' _(.ll.;...') ________ _ Stairs North: ------------- Stairs South: ------------- Top Fill Structure North: _&_,,_a....,..,,~"""·:') _________ _ Top Fill Structure South: _(_90 ___ -_.CP....__ ________ _ Drain Valve North: _...,.Cr-..__· ___ o""'o .... D .... · _______ _ Drain Valve South: _._.&:,~oD=----------- Perimeter Fence & Gates: ~@@ ___________ _ Valve House: _ _.(ibo==D'----------- Comments: f/J.L /?Eff-l1Qf!. ·1u Date of Inspection: 2.-~-~o :>-D Performed by: !' ·-+ ··valve Houae _._ 0-W ·-+ ·-.. . -. 1:.. Outlet Vlive .. 'I . , .: I , ·-+ I / I ·-.. I' i I -, ,l I '' -.. -----.-·--·-+ .. ' .. . ' I' ·-• 11 1 .. ·-f . OIJtlel Valve 1 f r, .. ·-t t I .: 1 , 1, ·-• t I •• ; . I -~ .. ... :. ' ... _ i-+ -...... -+ ·-+ ! ... • .... . ... !' !' !' + + + -.... -"--.. .___.. - ----...,_ .. --~~-~ - + + + + Nonl'I Pona + --- ... - South P'.)nd + -·-. + + !. + .... Stars ~-. -·-. + + ' ., - .. + + + + ... ... + + I ., Co 1...11J I' + + + Stan + --·· ·-- "'. + .. a( + + + I ., ' , .... , ... ~' ,. + + + -+ ... • t + + + I ., !' ( + + - -- + -----"'S --. -' +f + - ' . 'i : "-I I +._ + - ~ r--+ + - + + - + + - - + + ·- + + -- + + -L !, South Tahoe Public Utility District ERB Inspection Date oflnspection:?, IS ' 2_.C)~~ Performed by: __ c_f)_O_L---_,N._· ________ _ Inspection Procedure: Walk the entire crest of the ERB looking for any problems. Pay particular attention to the condition of the liner. Note the location of any needed repairs on the map on the next page . If the basin is empty and free of snow, walk the entire interior tow checking for liner failures. Scan the entire floor for breaches of any kind. Rodent activity: /..JD A'-' t.SS:. SNOWC:.. 1) ~~ I I Vegetation control: NC 0cc.ESS / I 1, Overflow Spillway: N t:i Pi e.LESS I \ I I Stairs North: i-tD I' 'I Stairs South: 1',....\ t:) ~u css l ~ 'I Top Fill Structure North: 1'.lo A-c.c£SS I I \. I Top Fill Structure South: "'() '4<-l.~, ":> \ l Drain Valve North: No ~CL8S S \\ \. , Drain Valve South: r,ru ,C'tcL ~ Perimeter Fence & Gates: (;s-o'i::10 FQ..an. v--1 \~ \ ~A tJ.. 5 Gf' Valve House: G-oc[) -~-~--------- Comments: Tu Date of Inspection: 3, · \ ~ · ~C) ~~ Performed by: ( ( ( r ,-+ + + + + + -+ -+ + + .!-+ + + + -· NOf'lh, Pon d ... + + -... ,-+ + + ·-+ + + + + : South Pt>lid ,-+ + + + ,-+ -+-+ -+ + + + + + -+ + + + + + l l l l !, !, f + + + + + + !, LO l--I /.l !' + + + + + + !, r + + + + + + + + !, r + + - + - + - + ....... + + ...... + + - + + - + + - + + - + + ..... + + - + + -- + + --!, l Date: To: From: Topic: May 8, 2020 SOUTH TAH OE PUBLIC UTILITY DISTRICT MEMORANDUM John Thiel, Shannon Cotulla, Tim Bledsoe, Dan Arce Larry Mcdonough Export Line Check ************************************************************** * On 2/12/20, Bill Otto, Larry McDonough, Ross Cole, conducted our check of the District's export line from the treatment plant to station 564 + 06 near the Harvey Place reservoir. No damage to the pipe was found. CC Dan Arce EXPRT1000.MEM Larry McDonough Inspector Sample Sites Site Latitude Longitude Location Type Sample Alpine County Monitoring Wells ACMW-01AW 38.766952 -119.781561 Below Main Dam Monitoring Well ACMW-01BE 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 Celia Ranch, along DV Rd Monitoring Well ACMW-07S 38.771882 -119.801658 Diamond Valley Ranch Monitoring Well ACMW-08N 38.773618 -119.776847 Diamond Valley Ranch Monitoring Well ACMW-09D 38.780489 -119.790314 Diamond Valley Ranch Monitoring Well ACMW-10 38.773336 -119.794246 Diamond Valley Weather Station Monitoring Well ACMW-11 38.775595 -119.788216 Diamond Valley Ranch Monitoring Well ACMW-12 38.777644 -119.795388 Diamond Valley Ranch Monitoring Well ACMW-13 38.768977 119.797083 Diamond Valley Ranch Monitoring Well ACMW-14 38.767441 119.793215 Diamond Valley Ranch Monitoring Well ACMW-15 38.769600 119.784280 Diamond Valley Ranch Monitoring Well ACMW-16 38.773829 119.784173 Diamond Valley Ranch Monitoring Well ACMW-17 38.776273 119.790107 Diamond Valley Ranch Monitoring Well ACMW-18 38.779213 119.782997 Diamond Valley Ranch Monitoring Well ACMW-19 38.776249 119.762112 Diamond Valley Ranch Monitoring Well ACMW-20 38.808781 119.777665 Near SW-05 Monitoring Well ACMW-21 38.819915 119.777072 Emigrant Trail near Chambers Lane Monitoring Well ACMW-22 38.829022 119.783738 Fredericksburg Lane near S7 Monitoring Well ACMW-23 38.825384 119.760193 On road to SW-15, upstream (S) Monitoring Well ACMW-24 38.832193 119.757427 On road, downstream (N) of SW-15 Monitoring Well ACMW-25 38.830470 119.769901 Road between Brooke's & Neddenriep @ Neddenripp's Monitoring Well ACMW-26 38.840602 119.769677 Road between Brooke's & Neddenriep @ Stateline Monitoring Well Alpine County Domestic Well GW-05 38.830897 -119.773807 Neddenriep Ranch house Domestic Well GW-08 38.815528 -119.781095 Arant Ranch house Domestic Well GW-11 38.766522 -119.808540 Diamond Valley School Domestic Well GW-17 DV Ranch Domestic well Domestic Well D:\Lahontan\Sample Sites\Lahontan Report-Sample Sites 2019 Page1of2 Sample Sites Site Latitude Longitude Location Type Sample Alpine County Surfacewater Sites SW-01 38.768903 -119.838353 Carson River, W Fork, Crystal Springs Rd Surfacewater SW-02 38.756651 -119.806706 Indian Creek @ Diversion Surfacewater SW-03 38.773149 -119.772618 Indian Creek downstream of 1st bridge Surfacewater SW-04 38.776730 -119.760423 Indian Creek upstream of 2nd bridge Surfacewater SW-05 38.809525 -119.777030 Carson River, W Fork, Paynesville Surfacewater SW-06 38.840850 -119.764100 Carson River, W Fork, Stateline Surfacewater SW-07 38.854967 -119.786541 Fredericksburg Ditch Surfacewater SW-08 38.786579 -119.799800 Irrigation Ditch along Carson River Road Surfacewater Alpine County Soils Sites S-2 38.800316 -119.764305 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 38.829075 -119.780010 Neddenriep Ranch Soil S-7 38.829190 -119.785420 Bruns Ranch Soil Heavenly Valley Creek HVC-1 38.917861 -119.959632 Heavenly Valley Creek; Downstream of Pioneer Surfacewater HVC-2 38.920120 -119.969390 Heavenly Valley Creek; 250' upstream of Pond #2 Surfacewater HVC-3 38.921373 -119.971421 Heavenly Valley Creek; 25' downstream of Meadow Crest Dr Surfacewater HVC-5 38.921278 -119.971090 Heavenly Valley Creek; Effluent of drainage pipe along Meadow Crest Dr Surfacewater Tahoe Basin Monitoring Wells Control 38.9135951 -119.9623870 North east of post office @ Black Bart and Pioneer Trail Monitoring Well MW01-50 38.9131807 -119.9640739 SE corner of Emergency Retention Basin, At access gate to ERB Monitoring Well MW01.5 38.9129062 -119.9642166 SE corner of Emergency Retention Basin, At access gate to ERB Monitoring Well MW02-50 38.9128116 -119.9652141 South side of Emergency Retention Basin, on Black Bart Ave Monitoring Well MW03-50 38.9129187 -119.9657562 South side of Emergency Retention Basin, on Black Bart Ave Monitoring Well MW04-50 38.9148881 -119.9666463 W side of Emergency Retention Basin, off Hank Monk Ave Monitoring Well MW0?-50 38.9157020 -119.9639551 NE corner of Emergency Retention Basin Monitoring Well MW08-25 38.9213967 -119.9709800 SW corner of Pond #1, at south access gate to STPUD Monitoring Well MW11 38.9238680 -119.9677190 250 ft south east of North Gate (to Al Tahoe Blvd) Monitoring Well MW12 38.9226200 -119.9683700 11 Oft south of Biosolids Building Monitoring Well MW13 38.9206200 -119.9692200 125 ft south east of Pond #2 Monitoring Well Ditch Sites DD-01 38.765624 -119.780543 Diamond Ditch @ beginning; HPR effluent Ditch SW-12 38.809127 -119.777411 Bruns Diversion Ditch SW-13 38.810082 -119.776900 Fredericksburg Ditch Ditch SW-15 38.828440 -119.756263 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 D:\Lahontan\Sample Sites\Lahontan Report-Sample Sites 2019 Page2of2 .. ··~ ,. ••••!\ ; 0 ,.. SW.-01 ~ .. · 1,5 00 J,000 '• .. ···VI .. ... .. 6,000 Feet ,I ., SW-06SW:08 ~ &W -02 •· . ~· ~ ~ SW-07 ~ 'it '· ~ -V.: .. I r , ' . '. .- SW-0~ SW,13 , d_VJ.12 t 'Vh:r • ~ ......... "' .-:, ·---· ... ~...,.r ,• .,,.. -.1JW«$- o~"~n~ ~ © .. ~ " SW,10 EXPLANATION Surface Water Ditch Reservoir MONITOR WELL ' . N A .--=:J Irrigation -Recyled-23 Water Irrigation -Blended Recycled Water SOUTH TAHOE PUBLIC UTILITY DISTRICT RECYCLED WATER PROGRAM MONITORING LOCATIONS ALPINE COUNTY, CA Path: X:IGISIIB_Alpine Coun ty\Alpine Co Monitoring_ 11 x17 _ 15 Aug 2014.mxd ' ''1 1,500 l,POO 5,000Faal SOUTH TA HOE PUBLIC UTILITY DISTRICT RECYCLED WATER MONITORING PROGRAM WELL LOCATIONS CARSON VALLEY GROUNDWATER BASIN (6-6) ALPINE COUNTY, CA Harvey Place Reservoir Recycled Water Current Storage Not including 200+/-acre-foot dead pool Maximum Storage, Acre-feet: 3,800 Stored Remaining Date Acre-feet Acre-feet 01/01/16 743 3,057 02/01/16 1,185 2,615 03/01 /16 1,493 2,307 04/01/16 1,875 1,925 05/01/16 2,104 1,696 06/01/16 2,322 1,478 07/01/16 2,139 1,661 08/01/16 1,304 2,496 09/01/16 595 3,205 10/01/16 72 3,728 11/01/16 243 3,557 12/01/16 479 3,321 01/01/17 940 2,860 02/01/17 1,843 1,957 03/01/17 3,082 718 04/01/17 3,460 340 05/01/17 3,005 795 06/01/17 2,617 1,183 07/01/17 2,210 1,590 08/01/17 1,626 2,174 09/01/17 878 2,922 10/01/17 114 3,686 11/01/17 220 3,580 12/01/17 544 3,256 01/01/18 878 2,922 02/01/18 1,177 2,623 03/01/18 1,410 2,390 04/01/18 1,938 1,862 05/01/18 2,246 1,554 06/01/18 2,465 1,335 07/01/18 1,927 1,873 08/01/18 1,240 2,560 09/01/18 531 3,269 10/01/18 88 3,712 11/01/18 206 3,594 12/01/18 453 3,347 01/01/19 781 3,019 02/01/19 1,131 2,669 03/01/19 1,714 2,086 04/01/19 2,210 1,590 05/01/19 2,517 1,283 06/01/19 1,991 1,809 07/01/19 1,326 2,474 08/01/19 693 3,107 09/01/19 185 3,615 10/01 /19 72 3,728 11/01/19 217 3,583 12/01 /19 472 3,328 01/01/20 798 3,002 02/01/20 1,063 2,737 03/01/20 1,326 2,474 E:\HPR\HPR Current Slorage-Lahontan_Report � i 01/16 02/16 03/16 04/16 05/16 06/16 07/16 08/16 09/16 10116 11116 12/16 01117 02117 03117 04117 05/17 06117 07117 08117 09/17 10/17 11117 12117 01118 02118 03/18 04/18 05/18 06/18 07/18 08/18 09/18 10/18 11118 12118 01119 02119 03119 04119 05119 06119 07119 08119 09/19 10119 11119 12119 01120 02120 0 U1 0 0 ...... 0 0 0 03/20 - ...... U1 0 0 Acre-feet N 0 0 0 N U1 0 0 w 0 0 0 w U1 0 0 +:>,. 0 0 0 :::a :I:CD s» (") < '< CD �'<CD a."'tJ:em m c,,... CDCD ;:a -, CD en en,... CD � < mocc -· CD -, -e -::: eurofins I Eaton Analytical 750 Royal Oaks Drive, Suite 100 Monrovia, California 91016-3629 Tel: (626) 386-1100 Fax: (866) 988-3757 1 800 566 LABS ( 1 800 566 5227) Date of Issue 03/09/2020 ~~ EUROFINS EATON ANALYTICAL, LLC UMVN: Monica Van Natta Project Manager 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 REPORT REVISED, replaces the original report . Report:8564 71 Project:DRINKING Group:VOCS plus Oxygentates • Accredited in accordance with TNI 2016 and ISO/IEC 17025:2017. TESTING L.ABORATORV AT-1807 UTAH ELCP CA00006 • 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/I EC 17025:2017 accredited methods Page 1 of 19 pages -::-eurofins State Alabama Arizona Arkansas California Colorado Connecticut Delaware Florida* Georgia Guam Hawaii Idaho Illinois* Indiana Iowa -Asbestos Kansas* Kentucky Louisiana* Maine Maryland Commonwealth of Northern Marianas Is. Massachusetts Michigan Mississippi Eurofins Eaton Analytical, LLC Eaton Analytical STATE CERTIFICATION LIST Certification Number State Certification Number 41060 Montana Cert 0035 AZ.0778 Nebraska Certified Certified Nevada CA000062018 2813 New Hampshire * 2959 Certified New Jersey* CA008 PH-0107 New Mexico Certified CA006 New York* 11320 E871024 North Carolina 06701 947 North Dakota R-009 18-005R Oregon* CA200003-005 Certified Pennsylvania * 68-565 Certified Puerto Rico Certified 200033 Rhode Island LA000326 C-CA-01 South Carolina 87016 413 South Dakota Certified E-10268 Tennessee TN02839 90107 Texas* T104704230-18-15 LA180000 Utah (Primary AB) * CA00006 CA0006 Vermont VT0114 224 Virginia* 460260 MP0004 Washington C838 M-CA006 EPA Region 5 Certified 9906 Los Angeles County 10264 Sanitation Districts Certified * NELAP/TNI Recognized Accreditation Bodies 750 Royal Oaks Drive, Suite 100 Monrovia, CA 91016-3629 T ! 626-386-1100 F ! 866-988-3757 www.EurofinsUS.com/Eaton Page 2 of 19 pages ISO/IEC 17025 Accredited Method List The tests listed below are accredited and meet the requirements of 150/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 \\'ulcrll\11 SPECIFIC TESTS TECHNIQUE USED (Drinking (Waste Cnmponcnl or Food ,rnd lk,·mc,/ METHOD OR mental mental \V11lcr ,i~ 11 SPECIFIC TESTS TECHNIQUE t:SED (Drinking (Waste ComponcntofFoocl 11ndllc\·/llc\·/ Water) Water) Uolllcd \,n1cr Water) Water) llolllcdW11tcr 1,2.3-TCP (5 PPT & 0.5 CA SRL 52.JM-TCP PPTl X X Hexavalent Chromium EPA218.7 X X 1.4-Dioxane EPA 5::!::! X X Hexa\.alenl Ch1omiurn SM 3500-C, B X 2.3.7.8-TCDD Modified EPA 16138 X X Ho1mones EPA 539 X X AcrvJamide lo_House Method 12440] • X Hydroxide as OH Cale SM 2330B X X Alirnl Toxins/Micmcvstin In House Method 13570 ) Kield.abl Nilro£en EPA351.2 X Alkalinity SM 23208 X X X LeJ!ionella Lel!iolert X X Ammonia EPA 350.1 • • Mercu1y EPA 245 .I • X X Ammonia SM 4500-NH.1 H X X Metals EPA 200 . 7 I 200 .8 X X X Anions and DBPs bv IC EPA 300.0 X X X Microcystin LR ELISA /2360) X X Anions and DBPs by IC EPA 300.1 X X Mic1ocystin, Total EPA 546 X X Asbestos EPA 100.2 X X NOMA EPA 521 In house method (2425) X X BOD/CBOD SM5210B X X Nitrale/Nit1ite Nitrogen EPA 353.2 X X X B1omate In House Method (c.J47) X X OCL. Pesticides/PCB EPA 505 X X Cai barnates EPA 531.2 • X 011ho Phosohate EPA 365.1 X X • Carbonale as C03 SM 23308 X X X Ortho Phosphorous SM 4500P E X X Caibonyls EPA 556 X X Oxyhalides Disinfection EPA317.0 Bvnt o<lucL< X X COD EPA 410.4 / SM 5220D X Perchlm ate EPA 331.0 X X Chlo, ainines SM 4500-CL G • X ' Perchlo,ate (low and high) EPA 314.0 X X Chlorinated Acids EPA 515.4 X X Pernuorinated Alkyl Acids EPA 537 X X Chlo, inated Acids EPA 555 X X Pe1fluorinated Polutant In house Method (2434) X X Chlo1ine Dioxide SM 4500-CL02 D Palin Test X X pH EPA 150 .1 X Chloi ine -Total/Free/ SM 4500-C! G Combined Residual X X X pH SM 4500-H+8 X ' X Conductivity EPA 120.1 X Phenylurea Pesticides/ In House Method. based on EPA X X Herbicides 532 (2448) Conductivity SM2510B X X X Pseudoinonas I DEXX Pseudale11 (2461 l X X Corrosivity (Langelier Index) SM 23308 X X Radium-226 GA Institute of Tech X ' Cvanide, Amenable SM 4500-CN G X X Radiwn-228 GA Institute of Tech X X Cyanide. Free SM 4500CN F X X X Radon-222 SM 7500RN X X Cyanide. Total EPA 335.4 X X X Residue. Filte1able SM 2540C X X X Cyanogen Chloride (screen) In House Method (2470) X X Residue, Non-filterable SM 2540D X Diquat and Paraquat EPA 549.2 X X Residue, Total SM 25408 X X DBP/HAA SM 6:!51 B X X Residue& Vol_atile EPA 160.4 X Dissolved Oxygen SM 4500-0 G X X Semi-VOC EPA 525 .2 X X DOC SM 53!0C X X Silica SM 4500-Si D X ' E.Coli (MTF/EC+MUG) X X Silica SM 4500-Si02 C X X E. Coli CFR 141 .21(f)(6)(i) X X Sulfide SM 4500-S D X E, Coli SM 9:!:!3 X Sulfite SM 4500-SO'B X X X E. Coli (Enwneration) SM 92:!IB.1/SM 9221F X X Surfactants SM 5540C X X X E. Coli (Enwneration) SM 92238 X X Taste and Odo r Analytes SM 6040E X X ED8/DC8P EPA 504.1 X Total Colifonn (P/A) SM 9221 A, B X X ED8/D8CP and DBP EPA 551.1 X X Total Colifonn SM 9221 A, 8, C (Enumeration) X X EDTAandNTA In House Method (2454) X X Total Colifonn IE. coJi Cnlisure SM 9223 X X Endothall EPA 548.1 X X Total Colifonn SM 92218 X Endothall In-house Method (2445) X X Total Colifonn with Chlmine SM 92218 Present X Enterococci SM9:!30B X X Total Colifonn / E.coli (P/A SM 9223 and. En.umeration) X X Fecal Colifonn SM 9:221 E (MTF/EC) X TOC SM 53 lOC X X X Fecal Colifonn SM 9 00 1C,E(MTFIEC) X TOX SM 5320B X Fecal Colifonn SM 9221 E (MTF/EC) (Enmueration) X X Total Phenols EPA 420 .1 X Pecal Colifonn with SM 9221E Chlorine Pl'esent X Total Phenols EPA 420.4 X X X Fecal Streotococci SM 9:!308 X X Total Phosoho1ous SM 4500 PE X Fluoride SM 4500-F C X X X Triazine Pesticides & In House (3617) Degradates X X Glvohc,sate EPA 547 X X Turbidity EPA 180 .l X X X GIYJlhosate + AMPA In House Method (3618) X X Turbiditv SM :!1308 X X Gross Alpha/Beta EPA 900.0 X X X Uranium by ICP/MS EPA 200.8 X X Gross Alpha Coprecipitation SM 7110C X X X UV 254 SM 59108 X Hardness SM 234Q8 X X X voe EPA 524 .2 X X Heteroll'Ophic Bacteria In House Method (2439) X X voe In House Method (241 I) X X Heterotrophic Bacteria SM 9215 8 X X Yeast and Mold SM 9610 X X Hexa\.aJent Chromium EPA:!18.6 X X X Field Samnlin~ NIA 750 Royal Oaks Dr., Ste 100, Monrovia, CA 91016 Tel (626) 386-1100 Fax (866) 988-3757 hltp,:!/www.eu,ofTn,u,.<om/Ea ton 1/onlM OOl l><u,d:<>>/10/1018 Page 3 of 19 pages South Tahoe Public Utility District 1275 Meadow Crest Drive South Lake Tahoe , CA 96150 Phone : (530}-543-6231 Lab ID# AG70859 Sample Site WW-05 J F n ~IGrab NJ<';s : _Re port MTBE to 0.2 ug/L l __ _Analyze Travel and Field Blanks only if voes detected in samples. _Use Calif State WriteOn to report & upload results of Potable Water Wells . Please Return all STPUD ice chests & Blue Ice Comments : -:0 Ill (C CD 1.. e 0 r: ';Cl -"O (0 (D 1/1 CHAIN OF CUSTODY Lab Sent Eurofins Sampler(s): D. Trebotich Collection Date & Time l ;2,2012020 12:03 WW Relinqu ishe~by: Signature /, · ~ X Preservatives: voe-HCI d'Lc_.l~d'-"" Print ~ovl~ -(retJ.;ti'd ~ Company South Tahoe Public Utili!}: District Date: (t). • 2. () -1./) Time : M;O Relinquished by: Signature Print Company Date: Time: Turn-Around-Time: Standard Received by : IJ----Signature Print ,JLJ (} St1 nr...\'U z... Company a---P Date : ·1.l z..., Lu Time : /uz.-s- Received by : Signature Print Company Date: Time: Page 1 of 1 CD "O w <Cl (l) (J) ::~ e u rofi ns INTERNAL CHAIN OF CUSTODY RECORD Eaton Analytical SAMPLE TEMP RECEIVED: IEE A Fold or Num b er: Not e: If nm pi es are oul of temperature r.rnge, le i the ASMs know. AS Ms wtll determkle whether to proce ed wlU , analys ts or not. SAMPLES REC'D DAY OF COLLECTION? Yes/ No· IR Gun ID= lo3'1 A (Obsarvation='2 -1../ °C) (Corr.Factor~ °C) (Final}_· z... ___ °C) TYPE OF ICE: Real __ Synthetic ___ No Ice __ CONDITION OF ICE: Frozen__ Partially Frozen __ Thawed __ N/A METHOD OF SHIPMENT: Pick-Up / Walk-l ~PS / OHL / Area Fast I Top Lina / Other:------ Compliance Acceptance Criteria : 1) Chemistry: >0, ,;; 6°C, not frozen (NELAP) (if received after 24 hrs of sample collection) 2) Microbiology, Distribution: < 10°C, not frozen (can be 2:10•c if received on ice the same day as sample collection , within B hours) 3) Microbiology, Surface Water:< 1 o•c {if received after 2 hours of sample collection) II oul ol lempeoalure range lor bolh Chomtslry ord Microbiology samples ond lemporelure does nol confirm, lhen measure lhe temperature ol 1 .. (Obsnrvfllllon-•c, (Corr.F11r:lor •c) (Anal .. ·ci 2 .. (Obaervallon-•c) (Corr Faclor •c, (Anal -'CJ each quadranl end record each lemperature ol the quedrenls 3 • (ObHrnllon• ·CJ (Cat1 Faclor -C} [Flnal. "C) 4 .. (Obsarvalfon,. ~ •c1 ICorr.FllClor ·c, tFl.nol-"Cl 4 Dioxin (1613 or 2,3,7,B TCDD): must be between 0-4 °C, not frozen (If received after 24 hrs of sample collection) 5) pH Check. Manuf acturer : Lot Number: ____ ,pH strip type : 0 -14 or _____ Expiration Date ____ Res ults : 6) Chlorlne check. Manufacturer : Sansale . Lot No .: Expiration Date : Results -------- 7) VOA Headspace: No Samples with Headspace: i==J Samples with Headspace (see below): ~ Headspace Documentation (use additional VOC Internal COFC tor additional bottles) Exempt from headspace concerns : Melhods 515.4, HAA(S251,552), 505 , SPME,@CH, 532LCMS, 556,536, Analoxln, LCMS methods using 40 ml vials, lnlornallonal clients ; Samp ID Bollie # N~~~<6 >6mm Samp ID Bollie # No~:<6 >6mm Samp ID Bollie # No_'.'.~<B >6mm Samp ID Bollle # No~~<B >6mm Note Sample IDs which have diss imilar headspace (i.e . potential sampl i ng errors): __________________________ _ SIQfU,TURE PRINT NAME CDMPAII Y/Ttllf DATE TIME Eurollns Ealon AnalyUcal QA FO 0083.7 (QA FO·FRMSS041 (S/23/18J Ver 7 Page_of_ sa5ed 6 ~ JO g a5ed ~ ~~ o:.. -.. -...i -...i -...i :E 0, -. co ~ :I: ~ .,, co (JI )> "tJ :::0 0 .,, i3! :::0 ~ I ..., (") ...... ~ 0 .,, c::: < m (/) m m :::0 ~iJ co z .... OJ--0 <==! C) w :::c 0 ;;:o a, -I )I, • ntlHtt'ltJ111n 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 . Pa ge I o l" I .... 0 --U>U>O °"'00::o ...... m ~SSGi u, C: !::c:cz 0 :::0 ~ ........ -~~~ :::0 0 0 00< 0 "Tl :Emmi; -< -0"0"0 >z ::occ ma:,c, r Cl) cnr om 0 --<c'j ,;; )> ~s w > > tO s ~ <F (0 ~ -I "' m=i J ..... cnO 0 -< 0 oz a ~ JJ ..... <ii _, .... .... q a, :::0 > :0 =It: z c'i ..... > .... or 0 -< -t n [JJ o:»cn > ;= i!:jO:C r r . :;;=o en m -G>a z ~--i)> CJ ~~~ m ::0 ~Or,.) ~:=~ zm!J:l !!l "' 0 .... "" "" 0 56B.2049EtFE4A 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 . 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Written claims must be filed within strict time limits. see current FedEx Service Guide . https:/1 ,,,n,. tcdex.com/shi pping/html/en /Printl Frame.htm I 2/20 /2020 =::: eurofins I Eaton Analytical Tel: (626) 386-1100 Fax: (866) 988-3757 1 800 566 LABS ( 1 800 566 5227) South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Flags Legend: Laboratory Comments Report: 856471 Project: DRINKING Group: VOCS plus Oxygentates LM -MRL Check recovery was above laboratory acceptance limits. This target analyte was not detected in the sample. The Comments Report may be blank if there are no comments for this report. Page 7 of 19 pages ~:: eurofin j Eaton Analytical Tel: (626) 386-1100 Fax: (866) 988-3757 1 800 566 LABS (1 800 566 5227) South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Prepared Analyzed Prep Batch Analyzed Batch WW-05 Final Grab {202002210608} Variable ID: AG70859 Method EPA 524.2 -Volatile Organics by GCMS 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 ,2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 ,2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 ,2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 .2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 ,2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 ,2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 ,2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 ,2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524.2) 03/03/20 03/03/20 20: 34 1232033 1232048 (EPA 524 ,2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 .2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524.2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 .2) 03/03/20 03/03/20 20: 34 1232033 1232048 (EPA 524 .2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524.2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 ,2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 .2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 .2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524.2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 .2) 03/03/20 03/03/20 20: 34 1232033 1232048 (EPA 524 .2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 .2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 .2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 ,2) 03/03/20 03/03/20 20:34 1232033 1232048 (EPA 524 ,2) Rounding on lolals after summation (c) -indicates calculated results Analysis is a calculated result . Reported results are not rounded until the final step before reporting Therefore melhods that use a fesl result with further calculation may have slight differences in final result than the component analyses. Analyte 1, 1, 1,2-Tetrachloroethane 1, 1, 1-Trichloroethane 1, 1,2,2-Tetrachloroethane 1, 1,2-Trichloroethane 1 , 1-Dichloroethane 1 , 1-Dichloroethylene 1, 1-Dichloropropene 1,2,3-Trichlorobenzene 1,2,3-Trichloropropane 1,2,4-Trichlorobenzene 1,2,4-Trimethylbenzene 1,2-Dichloroethane 1,2-Dichloropropane 1,3,5-Trimethylbenzene 1,3-Dichloropropane 2,2-Dichloropropane 2-Butanone (MEK) 4-Methyl-2-Pentanone (MIBK) Benzene Bromobenzene Bromochloromethane Bromodichloromethane Bromoethane Bromoform Laboratory Data Report: 856471 Project: DRINKING Group: VOCS plus Oxygentates Samples Received on : 02/21/2020 1025 Result Units MRL Sampled on 02/20/2020 1203 ND ug/L 0 50 ND ug/L 0 50 ND ug/L 0.50 ND ug/L 0.50 ND ug/L 0 .50 ND ug/L 0.50 ND ug/L 0.50 ND ug/L 0 50 ND ug/L 0 .50 ND ug/L 0.50 ND ug/L 0.50 ND ug/L 0.50 ND ug/L 0.50 ND ug/L 0.50 ND ug/L 0.50 ND ug/L 0.50 ND ug/L 5.0 ND ug/L 5.0 ND ug/L 0.50 ND ug/L 0.50 ND ug/L 0,50 ND ug/L 0.50 ND ug/L 0.50 ND ug/L 0,50 Dilution 1 Bromomethane (Methyl Bromide) ND ug/L 0.50 Carbon disulfide ND ug/L 0.50 Carbon Tetrachloride ND ug/L 0,50 Chlorobenzene ND ug/L 0.50 Chlorodibromomethane ND ug/L 0.50 Page 8 of 19 pages -::• eu rofi ns I Eaton Analytical Tel: (626) 386-1100 Fax: (866) 988-3757 1 800 566 LABS ( 1 800 566 5227) South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Prepared Analyzed Prep Batch Analyzed Batch 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20: 34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20: 34 1232033 1232048 03/03/20 03/03/20 20: 34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20: 34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20: 34 1232033 1232048 03/03/20 03/03/20 20: 34 1232033 1232048 03/03/20 03/03/20 20: 34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20: 34 1232033 1232048 03/03/20 03/03/20 20: 34 1232033 1232048 03/03/20 03/03/20 20: 34 1232033 1232048 03/03/20 03/03/20 20: 34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 Rounding on totals after summation . Method (EPA 524-2) (EPA 524.2) (EPA 524 2) (EPA 524 2) (EPA 524.2) (EPA 524.2) (EPA 524.2) (EPA 524.2) (EPA 524.2) (EPA 524.2) (EPA 524.2) (EPA 524 .2) (EPA 524 .2) (EPA 524 .2) (EPA 524 .2) (EPA 524 .2) (EPA 524.2) (EPA 524 .2) (EPA 524 .2) (EPA 524 .2) (EPA 524 .2) (EPA 524 .2) (EPA 524 .2) (EPA 524 .2) (EPA 524 .2) (EPA 524 .2) (EPA 524 .2) (EPA 524 .2) (EPA 524 .2) (EPA 524 ,2) (EPA 524 .2) (EPA 524 ,2) (EPA 524 .2) (c) -indicates calculated resulls Analysis is a calculated result Reported results are nol rounded until the final step before reporting Therefore methods Lhat use a lesl resull with further calculalion may have slight differences in Final resull lhan the component analyses. Analyte Chloroethane Chloroform (Trichloromethane) Laboratory Data Report: 856471 Project: DRINKING Group: VOCS plus Oxygentates Samples Received on : 02/21/2020 1025 Result Units MRL ND ug/L 0.50 3 77 ug/L 0.50 Dilution Chloromethane(Methyl Chloride) ND ug/L 0.50 cis-1,2-Dichloroethylene ND ug/L 0.50 cis-1,3-Dichloropropene ND ug/L 0.50 Dibromomethane ND ug/L 0.50 Dichlorodifluoromethane ND ug/L 0.50 Dichloromethane ND (LM) ug/L 0.50 Di-isopropyl ether ND ug/L 3.0 Ethyl benzene ND ug/L 0.50 Hexachlorobutadiene ND ug/L 0 .50 lsopropylbenzene ND ug/L 0 .50 m,p-Xylenes ND ug/L 0 .50 m-Dichlorobenzene (1,3-DCB) ND ug/L 0 .50 Methyl Tert-butyl ether (MTBE) ND ug/L 0 .50 Naphthalene ND ug/L 0 .50 n-Butylbenzene ND ug/L 0 .50 n-Propylbenzene ND ug/L 0 50 o-Chlorotoluene ND ug/L 0.50 o-Dichlorobenzene (1,2-DCB) ND ug/L 0.50 a-Xylene ND ug/L 0.50 p-Chlorotoluene ND ug/L 0.50 p-Dichlorobenzene ( 1.4-DCB) ND ug/L 0,50 p-lsopropyltoluene ND ug/L 0.50 sec-Butyl benzene ND ug/L 0.50 Styrene ND ug/L 0 50 tert-amyl Methyl Ether ND ug/L 30 tert-Butyl Ethyl Ether ND ug/L 3.0 tert-Butylbenzene ND ug/L 0 50 Tetrachloroethylene (PCE) ND ug/L 0.50 Toluene 1 15 ug/L 0.50 trans-1,2-Dichloroethylene ND ug/L 0.50 trans-1,3-Dichloropropene ND ug/L 0 50 Page 9 of 19 pages ~:: eurofins I Eaton Analytical Tel: (626) 386-1100 Fax: (866) 988-3757 1 800 566 LABS (1 800 566 5227) South Lake Tahoe Public Utilities District Daniel Arce 1275 Meadow Crest Drive South Lake Tahoe, CA 96150 Prepared Analyzed Prep Batch Analyzed Batch 03103/20 03/03/20 20: 34 1232033 1232048 03/03120 03/03/20 20:34 1232033 1232048 03/03/20 03/03120 20:34 1232033 1232048 03103/20 03/03120 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03103/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 03/03/20 03/03/20 20:34 1232033 1232048 Rounding on tolals aflersummalion . Method (EPA 524.2) (EPA 524.2) (EPA 524 .2) (EPA 524 .2) (EPA 524 .2) (EPA 524 .2) (EPA 524.2) (EPA 524.2) (EPA 524 .2) (EPA 524 .2) (c) -indicales calculaled results Analysis is a calculaled result . Reported resulls are not rounded unlil the final step before reporting Therefore methods that use a lest result with further calculation may have slight differences in final result than lhe component analyses Analyte Trichloroethylene (TCE) Trichlorofluoromethane Laboratory Data Report: 856471 Project: DRINKING Group: VOCS plus Oxygentates Samples Received on : 02/21/2020 1 025 Result Units MRL ND ug/L 0.50 ND ug/L 0 50 Dilution Trichlorotrifluoroethane(Freon 113) ND ug/L 0.50 Vinyl chloride (VC) ND ug/L 0.30 1,2-Dichloroethane-d4 115 % 4-Bromofluorobenzene 93 ,8 % Toluene-dB 104 % Total 1,3-Dichloropropene ND ug/L 0,50 Total THM 3.80 ug/L 0.50 Total xylenes ND ug/L 0.50 Page 10 of 19 pages :::: eurofins I Eaton Analytical Tel: (626) 386-1100 Fax: (866) 988-3757 1 800 566 LABS (1 800 566 5227) South Lake Tahoe Public Utilities District Volatile Organics by GCMS Prep Batch: 1232033 Analytical Batch: 1232048 202002210608 WN-05 Final Grab Laboratory QC Summary Report: 856471 Project: DRINKING Group: VOCS plus Oxygentates Analysis Date: 03/03/2020 Analyzed by: TR?W Page 11 of 19 pages eurofins J Eaton Analytical QC Type Tel: (626) 386-1100 Fax: (866) 988-3757 1 800 566 LABS (1 800 566 5227) South Lake Tahoe Public Utilities District Analyte Volatile Organics by GCMS by EPA 524.2 Analytical Batch: 1232048 LCS1 1, 1, 1,2-Tetrachloroethane LCS2 1, 1, 1,2-Tetrachloroethane MBLK 1, 1, 1,2-Tetrachloroethane MRL_CHK 1, 1, 1,2-Tetrachloroethane LCS1 1, 1, 1-Trichloroethane LCS2 1, 1, 1-Trichloroethane MBLK 1, 1, 1-Trichloroethane MRL_CHK 1, 1, 1-Trichloroethane LCS1 1, 1,2,2-Tetrachloroethane LCS2 1, 1,2,2-Tetrachloroethane MBLK 1, 1,2,2-Tetrachloroethane MRL_CHK 1, 1,2,2-Tetrachloroethane LCS1 1, 1,2-Trichloroethane LCS2 1, 1,2-Trichloroethane MBLK 1, 1,2-Trichloroethane MRL_CHK 1, 1,2-Trichloroethane LCS1 1, 1-Dichloroethane LCS2 1, 1-Dichloroethane MBLK 1, 1-Dichloroethane MRL_CHK 1, 1-Dichloroethane LCS1 1, 1-Dichloroethylene LCS2 1, 1-Dichloroethylene MBLK 1 , 1-Dichloroethylene MRL_CHK 1 , 1-Dichloroethylene LCS1 1, 1-Dichloropropene LCS2 1 , 1-Dichloropropene MBLK 1, 1-Dichloropropene MRL_CHK 1, 1-Dichloropropene LCS1 1,2,3-Trichlorobenzene LCS2 1,2,3-Trichlorobenzene MBLK 1,2,3-Trichlorobenzene MRL_CHK 1,2,3-Trichlorobenzene LCS1 1,2,3-Trichloropropane LCS2 1,2,3-Trichloropropane MBLK 1,2,3-Trichloropropane Spike recovery is already corrected for native results. Spikes which exceed Limits and Method Blanks with positive resulls are highlighted by~ Native Spiked Recovered 5 4.48 5 4.38 <0 .5 0.5 0.640 5 4.26 5 4.03 <0.5 0.5 0.510 5 5.17 5 5.06 <0.5 0.5 0.460 5 4.83 5 4.66 <0 .5 0.5 0.530 5 4.42 5 4.61 <0.5 0.5 0,570 5 4.40 5 4.45 <0.5 0.5 0.560 5 4.21 5 4.14 <0.5 0.5 0.530 5 5.27 5 5.13 <O 5 05 0,530 5 4.87 5 4 72 <0.5 Laboratory QC Report: 856471 Project: DRINKING Group: VOCS plus Oxygentates Units Yield(%) Limits(%) RPDLimit (%) Analysis Date: 03/03/2020 ug/L 90 (70-130) ug/L 88 (70-130) 20 ug/L ug/L 128 (50-150) ug/L 85 (70-130) ug/L 81 (70-130) 20 ug/L ug/L 102 (50-150) ug/L 103 (70-130) ug/L 101 (70-130) 20 ug/L ug/L 92 (50-150) ug/L 97 (70-130) ug/L 93 (70-130) 20 ug/L ug/L 106 (50-150) ug/L 88 (70-130) ug/L 92 (70-130) 20 ug/L ug/L 114 (50-150) ug/L 88 (70-130) ug/L 89 (70-130) 20 ug/L ug/L 112 (50-150) ug/L 84 (70-130) ug/L 83 (70-130) 20 ug/L ug/L 106 (50-150) ug/L 105 (70-130) ug/L 103 (70-130) 20 ug/L ug/L 106 (50-150) ug/L 97 (70-130) ug/L 94 (70-130) 20 ug/L RPO% 2 .3 55 2.1 36 42 1.1 1.7 2.7 3.1 Criteria for MS and Dup are advisory only, balch control is based on LCS , Criteria for duplicates are advisory only, unless otherwise specified in the method , RPD not calculated ror LCS2 when different a concentralion than LCS1 is used RPD not calculated for Duplicates when the result is nol rive Limes the MRL (Minimum Reporting Level) (S) -Indicates surrogate compound . (I) -lndicales internal standard compound Page 12 of 19 pages ~:: eurofins QC Type MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK MRLLW LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK Eaton Analytical Tel: (626) 386-1100 Fax: (866) 988-3757 1 800 566 LABS (1 800 566 5227) South Lake Tahoe Public Utilities District Analyte 1,2,3-Trichloropropane 1,2,4-Trichlorobenzene 1,2,4-Trichlorobenzene 1,2,4-Trichlorobenzene 1,2,4-Trichlorobenzene 1,2,4-Trimethylbenzene 1,2,4-Trimethylbenzene 1,2,4-Trimethylbenzene 1,2,4-Trimethylbenzene 1,2-Dichloroethane 1,2-Dichloroethane 1,2-Dichloroethane 1,2-Dichloroethane 1,2-Dichloroethane-d4 (S) 1,2-Dichloroethane-d4 (S) 1,2-Dichloroethane-d4 (S) 1,2-Dichloroethane-d4 (S) 1,2-Dichloroethane-d4 (S) 1,2-Dichloropropane 1,2-Dichloropropane 1,2-Dichloropropane 1,2-Dichloropropane 1,3,5-Trimethylbenzene 1,3,5-Trimethylbenzene 1,3,5-Trimethylbenzene 1,3,5-Trimethylbenzene 1,3-Dichloropropane 1,3-Dichloropropane 1,3-Dichloropropane 1,3-Dichloropropane 2,2-Dichloropropane 2,2-Dichloropropane 2,2-Dichloropropane 2,2-Dichloropropane 2-Butanone (M EK) 2-Butanone (M EK) 2-Butanone (MEK) 2-Butanone (MEK) Spike recovery is already corrected for native results , Spikes which exceed Limits and Method Blanks wilh positive results are highlighted by~ Native Spiked Recovered 0.5 0.510 5 4.86 5 4.81 <0 .5 0.5 0.510 5 4 .32 5 4.39 <0 .5 05 0 380 5 4.48 5 4,33 <0 _5 0.5 0.570 5 96 .8 5 97 .6 115 5 116 5 115 5 4.39 5 4.37 <0 .5 05 0 560 5 4.35 5 4 42 <0 ,5 0.5 0 390 5 4.66 5 4,52 <0 .5 0.5 0.520 5 4.28 5 4.29 <0 .5 0.5 0,580 50 51 .1 50 50 8 <5 .0 5 6 44 Laboratory QC Report: 856471 Project: DRINKING Group: voes plus Oxygentates Units Yield(%) Limits(%) RPDLimit (%) ug/L 102 (50-150) ug/L 97 (70-130) ug/L 96 (70-130) 20 ug/L ug/L 102 (50-150) ug/L 86 (70-130) ug/L 88 (70-130) 20 ug/L ug/L 76 (50-150) ug/L 90 (70-130) ug/L 87 (70-130) 20 ug/L ug/L 114 (50-150) % 97 (70-130) % 98 (70-130) % 115 (70-130) % 116 (70-130) % 115 (70-130) ug/L 88 (70-130) ug/L 87 (70-130) 20 ug/L ug/L 112 (50-150) ug/L 87 (70-130) ug/L 88 (70-130) 20 ug/L ug/L 78 (50-150) ug/L 93 (70-130) ug/L 90 (70-130) 20 ug/L ug/L 104 (50-150) ug/L 86 (70-130) ug/L 86 (70-130) 20 ug/L ug/L 116 (50-150) ug/L 102 (70-130) ug/L 102 (70-130) 20 ug/L ug/L 129 (50-150) RPO% 1.0 1 6 3.4 0.46 1.6 3.0 0.23 0.59 Criteria for MS and Oup are adviso.-y only, batch control is based on LCS. Crileria for duplicates are advisory only, unless olherwise specified in the method RPO not calculated for LCS2 when different a concenlralion lhan LCS1 is used RPO nol calculated for Duplicates when the result is not five times the MRL (Minimum Reporting Level). (S) -Indicates surrogate compound (I)~ Indicates internal standard compound , Page 13 of 19 pages ~~ eurofins QC Type LCS1 LCS2 MBLK MRL_CHK MRLLW LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 Eaton Analytical Tel: (626) 386-1100 Fax: (866) 988-3757 1 800 566 LABS (1 800 566 5227) South Lake Tahoe Public Utilities District Analyte 4-Bromofluorobenzene (S) 4-Bromofluorobenzene (S) 4-Bromofluorobenzene (S) 4-Bromofluorobenzene (S) 4-Bromofluorobenzene (S) 4-Methyl-2-Pentanone (MIBK) 4-Methyl-2-Pentanone (MIBK) 4-Methyl-2-Pentanone (MIBK) 4-Methyl-2-Pentanone (MIBK) Benzene Benzene Benzene Benzene Bromobenzene Bromobenzene Bromobenzene Bromobenzene Bromochloromethane Bromochloromethane Bromochloromethane Bromochloromethane Bromodichloromethane Bromodichloromethane Bromodichloromethane Bromodichloromethane Bromoethane Bromoethane Bromoethane Bromoethane Bromoform Bromoform Bromoform Bromoform Bromomethane (Methyl Bromide) Bromomethane (Methyl Bromide) Bromomethane (Methyl Bromide) Bromomethane (Methyl Bromide) Carbon disulfide Spike recovery is already corrected For native resulls. Spikes which exceed Limils and Melhod Blanks wilh positive resulls are highlighted by~ Native Spiked Recovered 5 91 .6 5 97 .6 92 .0 5 91 .0 5 94 .2 50 55 .1 50 51 3 <5 ,0 5 5,69 5 4.48 5 4.46 <0 .5 0 5 0 ,540 5 4.52 5 4.63 <0 .5 0.5 0.440 5 4.47 5 4,36 <0 .5 0 5 0.530 5 4.50 5 4.58 <0 .5 05 0 510 5 4 33 5 4 35 <0 .5 0,5 0 520 5 4 .66 5 4,78 <0 .5 0,5 0.490 5 5.05 5 5.31 <0 ,5 0.5 0.660 5 4 .37 Laboratory QC Report: 856471 Project: DRINKING Group: VOCS plus Oxygentates Units Yield(%) Limits(%) RPDLimit (%) % 92 (70-130) % 98 (70-130) % 92 (70-130) % 91 (70-130) % 94 (70-130) ug/L 110 (70-130) ug/L 103 (70-130) 20 ug/L ug/L 114 (50-150) ug/L 90 (70-130) ug/L 89 (70-130) 20 ug/L ug/L 108 (50-150) ug/L 90 (70-130) ug/L 93 (70-130) 20 ug/L ug/L 88 (50-150) ug/L 89 (70-130) ug/L 87 (70-130) 20 ug/L ug/L 106 (50-150) ug/L 90 (70-130) ug/L 92 (70-130) 20 ug/L ug/L 102 (50-150) ug/L 87 (70-130) ug/L 87 (70-130) 20 ug/L ug/L 104 (50-150) ug/L 93 (70-130) ug/L 96 (70-130) 20 ug/L ug/L 98 (50-150) ug/L 101 (70-130) ug/L 106 (70-130) 20 ug/L ug/L 132 (50-150) ug/L 87 (70-130) RPO% 7 1 0.45 2.4 2 .5 1.8 0 46 2,5 5.0 Criteria For MS and Dup are advisory only, batch control is based on LCS Criteria ror duplicates are advisory only, unless otherwise specified in Lhe method RPD not calculated For LCS2 when different a concentration than LCS1 is used . RPD not calculated For Duplicates when lhe result is not live limes lhe MRL (Minimum Reporting Level) (S) -Indicates surrogate compound (I) -lndicales inlernal standard compound Page 14 of 19 pages ~~ eurofin s QC Type LCS2 MBLK MRL _CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL _CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK Eaton Analytical Tel (626) 386-1100 Fax: (866) 988-3757 1 800 566 LABS ( 1 800 566 5227) South Lake Tahoe Public Utilities District Analyte Carbon disulfide Carbon disulfide Carbon disulfide Carbon Tetrachloride Carbon Tetrachloride Carbon Tetrachloride Carbon Tetrachloride Chlorobenzene Chlorobenzene Chlorobenzene Chlorobenzene Chlorodibromomethane Chlorodibromomethane Chlorodibromomethane Chlorodibromomethane Chloroethane Chloroethane Chloroethane Chloroethane Chloroform (Trichloromethane) Chloroform (Trichloromethane) Chloroform (Trichloromethane) Chloroform (Trichloromethane) Chloromethane(Methyl Chloride) Chloromethane(Methyl Chloride) Chloromethane(Methyl Chloride) Chloromethane(Methyl Chloride) cis-1,2-Dichloroethylene cis-1,2-Dichloroethylene cis-1,2-Dichloroethylene cis-1,2-Dichloroethylene cis-1,3-Dichloropropene cis-1 , 3-Dichloropropene cis-1 , 3-Dichloropropene cis-1 , 3-Dichloropropene Dibromomethane Dibromomethane Dibromomethane Spike recovery is already correcled for nalive results . Spikes which exceed Limils and Method Blanks with posilive results are highlighted by~ Native Spiked Recovered 5 4.26 <0.5 05 0.640 5 4.24 5 4.08 <0 .5 05 0.470 5 4.57 5 4 .52 <0 .5 05 0.490 5 4 .68 5 4 ,38 <0 .5 0.5 0.690 5 4 .52 5 4 .21 <0 .5 0.5 0.600 5 4.26 5 4.24 <0.5 0.5 0.540 5 4.63 5 4 .32 <0 ,5 0.5 0.580 5 4.01 5 4 .23 <0 .5 0,5 0,560 5 4.55 5 4.23 <0 .5 0.5 0.670 5 4 .52 5 4 .14 <0 .5 Laboratory QC Report: 856471 Project: DRINKING Group: VOCS plus Oxygentates Units Yield(%) Limits(%) RPDLimit (%) ug/L 85 (70-130) 20 ug/L ug/L 128 (50-150) ug/L 85 (70-130) ug/L 82 (70-130) 20 ug/L ug/L 94 (50-150) ug/L 91 (70-130) ug/L 90 (70-130) 20 ug/L ug/L 98 (50-150) ug/L 94 (70-130) ug/L 88 (70-130) 20 ug/L ug/L 138 (50-150) ug/L 90 (70-130) ug/L 84 (70-130) 20 ug/L ug/L 120 (50-150) ug/L 85 (70-130) ug/L 85 (70-130) 20 ug/L ug/L 108 (50-150) ug/L 93 (70-130) ug/L 86 (70-130) 20 ug/L ug/L 116 (50-150) ug/L 80 (70-130) ug/L 85 (70-130) 20 ug/L ug/L 112 (50-150) ug/L 91 (70-130) ug/L 85 (70-130) 20 ug/L ug/L 134 (50-150) ug/L 90 (70-130) ug/L 83 (70-130) 20 ug/L RPO% 2.5 39 1.1 6,6 7 .1 0.47 69 5.3 7.3 8.8 Crileria for MS and Dup are advisory only, batch conlrol is based on LCS Criteria For duplicates are advisory only, unless otherwise specified in the method RPD nol calculaled ror LCS2 when different a concentralion lhan LCS1 is used. RPD not calculated ror Duplicates when the result is not Five times the MRL (Minimum Reporting Level) (S) -Indicates surrogate compound (I) -Indicates inlernal standard compound Page 15 of 19 pages ~:: eurofin s QC Type MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK MRLLW LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK Eaton Analytical Tel: (626) 386-1100 Fax: (866) 988-3757 1 800 566 LABS (1 800 566 5227) South Lake Tahoe Public Utilities District Analyte Dibromomethane Dichlorodifluoromethane Dichlorodifluoromethane Dichlorodifluoromethane Dichlorodifluoromethane Dichloromethane Dichloromethane Dichloromethane Dichloromethane Di-isopropyl ether Di-isopropyl ether Di-isopropyl ether Di-isopropyl ether Ethyl benzene Ethyl benzene Ethyl benzene Ethyl benzene Hexachlorobutadiene Hexachlorobutadiene Hexachlorobutadiene Hexachlorobutadiene lsopropylbenzene lsopropylbenzene lsopropylbenzene lsopropylbenzene m,p-Xylenes m,p-Xylenes m,p-Xylenes m,p-Xylenes m,p-Xylenes m-Dichlorobenzene (1,3-DCB) m-Dichlorobenzene (1,3-DCB) m-Dichlorobenzene (1,3-DCB) m-Dichlorobenzene (1,3-DCB) Methyl Tert-butyl ether (MTBE) Methyl Tert-butyl ether (MTBE) Methyl Tert-butyl ether (MTBE) Methyl Tert-butyl ether (MTBE) Spike recovery is already corrected for native results. Spikes which exceed Limits and Method Blanks wilh positive results are highlighted by ~ Native Spiked Recovered 05 0 550 5 4.13 5 4.02 <0 .5 0.5 0.510 5 4 37 5 4.53 <0 .5 0.5 0.910 5 4 66 5 4 .75 <3 .0 0.5 0.610 5 4.43 5 4 26 <0 .5 0.5 0 490 5 4 .80 5 4 .59 <0 .5 0.5 0.460 5 4 .25 5 4 35 <0 .5 0.5 0.410 10 8.82 10 8.90 <0 .5 0.930 0.5 0.430 5 4 .53 5 4 ,70 <0 .5 0.5 0.420 5 4 86 5 4 .57 <0 .5 05 0 530 Laboratory QC Report: 856471 Project: DRINKING Group: VOCS plus Oxygentates Units Yield(%) Limits(%) RPDLimit (%) ug/L 110 (50-150) ug/L 83 (70-130) ug/L 80 (70-130) 20 ug/L ug/L 102 (50-150) ug/L 87 (70-130) ug/L 91 (70-130) 20 ug/L ug/L 182 (50-150) ug/L 93 (70-130) ug/L 95 (70-130) 20 ug/L ug/L 122 (50-150) ug/L 89 (70-130) ug/L 85 (70-130) 20 ug/L ug/L 98 (50-150) ug/L 96 (70-130) ug/L 92 (70-130) 20 ug/L ug/L 92 (50-150) ug/L 85 (70-130) ug/L 87 (70-130) 20 ug/L ug/L 82 (50-150) ug/L 88 (70-130) ug/L 89 (70-130) 20 ug/L ug/L 93 (50-150) ug/L 86 (50-150) ug/L 91 (70-130) ug/L 94 (70-130) 20 ug/L ug/L 84 (50-150) ug/L 97 (70-130) ug/L 91 (70-130) 20 ug/L ug/L 106 (50-150) RPD% 27 3.6 1 9 3.9 4.5 2.3 0.90 37 6.2 Criteria for MS and Dup are advisory only, batch conlrol is based on LCS , Crileria for dupticales are advisory only, unless olherwise specified in the method RPO not calculated for LCS2 when different a concentralion lhan LCS1 is used RPD not calculated for Duplicates when lhe result is not five limes the MRL (Minimum Reporting Level) (S) -Indicates surrogate compound. (I) -Indicates internal standard compound Page 16 of 19 pages eurofins j Eaton Analytical QC Type LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 Tel: (626) 386-1100 Fax: (866) 988-3757 1 800 566 LABS (1 800 566 5227) South Lake Tahoe Public Utilities District Analyte Naphthalene Naphthalene Naphthalene Naphthalene n-Butylbenzene n-Butylbenzene n-Butylbenzene n-Butylbenzene n-Propylbenzene n-Propylbenzene n-Propylbenzene n-Propylbenzene o-Chlorotoluene o-Chlorotoluene o-Chlorotoluene o-Chlorotoluene o-Dichlorobenzene (1,2-DCB) o-Dichlorobenzene (1,2-DCB) o-Dichlorobenzene (1.2-DCB) o-Dichlorobenzene (1,2-DCB) a-Xylene a-Xylene a-Xylene a-Xylene p-Chlorotoluene p-Chlorotoluene p-Chlorotoluene p-Chlorotoluene p-Dichlorobenzene (1,4-DCB) p-Dichlorobenzene ( 1,4-DC B) p-Dichlorobenzene (1.4-DCB) p-Dichlorobenzene (1,4-DCB) p-lsopropyltoluene p-lsopropyltoluene p-lsopropyltoluene p-lsopropyltoluene sec-Butyl benzene sec-Butyl benzene Spike recovery is already corrected for native results. Spikes which exceed Limits and Method Blanks with positive results are highlighted by~ Native Spiked Recovered 5 5.23 5 5.04 <0 .5 05 0 510 5 4.56 5 4.56 <0 ,5 0.5 0.420 5 4,27 5 4,37 <0 .5 0.5 0.420 5 4 49 5 4.40 <O 5 0.5 0.440 5 4.76 5 4.80 <O 5 0.5 0.500 5 4 36 5 4.38 <0 .5 0,5 0 480 5 4 .30 5 4.50 <0.5 0,5 0.400 5 4.45 5 4.63 <0 ,5 0.5 0.430 5 4 33 5 4.39 <O 5 0.5 0.390 5 4.55 5 4 64 Laboratory QC Report:856471 Project: DRINKING Group: voes plus Oxygentates Units Yield(%) Limits(%) RPDLimit (%) ug/L 105 (70-130) ug/L 101 (70-130) 20 ug/L ug/L 102 (50-150) ug/L 91 (70-130) ug/L 91 (70-130) 20 ug/L ug/L 84 (50-150) ug/L 85 (70-130) ug/L 87 (70-130) 20 ug/L ug/L 84 (50-150) ug/L 90 (70-130) ug/L 88 (70-130) 20 ug/L ug/L 88 (50-150) ug/L 95 (70-130) ug/L 96 (70-130) 20 ug/L ug/L 100 (50-150) ug/L 87 (70-130) ug/L 88 (70-130) 20 ug/L ug/L 96 (50-150) ug/L 86 (70-130) ug/L 90 (70-130) 20 ug/L ug/L 80 (50-150) ug/L 89 (70-130) ug/L 93 (70-130) 20 ug/L ug/L 86 (50-150) ug/L 87 (70-130) ug/L 88 (70-130) 20 ug/L ug/L 78 (50-150) ug/L 91 (70-130) ug/L 93 (70-130) 20 RPO% 3.7 0.0 2.3 2.0 0.84 0 46 4.5 4.0 1.4 20 Crileria for MS and Dup are advisory only, balch control is based on LCS Criteria for duplicates are advisory only, unless otherwise specified in Lhe melhod RPO not calculated for LCS2 when different a concenlralion than LCS1 is used, RPO not calculated for Duplicates when the result is not rive times the MRL (Minimum Reporting Level), (S) -Indicates surrogate compound , (I) -Indicates internal slandard compound Page 17 of 19 pages ~:: eurofins QC Type MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK MRLLW LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK Eaton Analytical Tel: (626) 386-1100 Fax: (866) 988-3757 1 800 566 LABS (1 800 566 5227) South Lake Tahoe Public Utilities District Analyte sec-Butyl benzene sec-Butyl benzene Styrene Styrene Styrene Styrene tert-amyl Methyl Ether tert-amyl Methyl Ether tert-amyl Methyl Ether tert-amyl Methyl Ether tert-Butyl Ethyl Ether tert-Butyl Ethyl Ether tert-Butyl Ethyl Ether tert-Butyl Ethyl Ether tert-Butylbenzene tert-Butylbenzene tert-Butylbenzene tert-Butylbenzene Tetrachloroethylene (PCE) Tetrachloroethylene (PCE) Tetrachloroethylene (PCE) Tetrachloroethylene (PCE) Toluene Toluene Toluene Toluene Toluene-dB (S) Toluene-dB (S) Toluene-dB (S) Toluene-dB (S) Toluene-dB (S) trans-1 ,2-Dichloroethylene trans-1,2-Dichloroethylene trans-1,2-Dichloroethylene trans-1,2-Dichloroethylene trans-1,3-Dichloropropene trans-1 , 3-Dichloropropene trans-1,3-Dichloropropene Spike recovery is already corrected for native results , Spikes which exceed Limits and Method Blanks with positive results are highlighted by~ Native Spiked Recovered <O 5 0.5 0.390 5 4 .54 5 4 .36 <O 5 0.5 0.460 5 4.83 5 4.69 <3 .0 05 0 580 5 4 .70 5 4 .87 <3 0 0.5 0,610 5 4 .33 5 4 ,39 <0 .5 0.5 0.390 5 4 .38 5 4.25 <0.5 0.5 0.520 5 4.41 5 4.36 <0 .5 0.5 0 500 5 97 .6 5 96 .0 104 5 104 5 106 5 4.69 5 4.56 <0.5 0.5 0.490 5 4.57 5 4.41 <0 .5 Laboratory QC Report: 856471 Project: DRINKING Group: VOCS plus Oxygentates Units Yield(%) Limits(%) RPDLimit (%) ug/L ug/L 78 (50-150) ug/L 91 (70-130) ug/L 87 (70-130) 20 ug/L ug/L 92 (50-150) ug/L 97 (70-130) ug/L 94 (70-130) 20 ug/L ug/L 116 (50-150) ug/L 94 (70-130) ug/L 97 (70-130) 20 ug/L ug/L 122 (50-150) ug/L 87 (70-130) ug/L 88 (70-130) 20 ug/L ug/L 78 (50-150) ug/L 88 (70-130) ug/L 85 (70-130) 20 ug/L ug/L 104 (50-150) ug/L 88 (70-130) ug/L 87 (70-130) 20 ug/L ug/L 100 (50-150) % 98 (70-130) % 96 (70-130) % 104 (70-130) % 104 (70-130) % 106 (70-130) ug/L 94 (70-130) ug/L 91 (70-130) 20 ug/L ug/L 98 (50-150) ug/L 91 (70-130) ug/L 88 (70-130) 20 ug/L RPO% 4.0 2.9 3.5 1.4 3.0 1.1 2.8 3.6 Criteria for MS and Oup are advisory only, batch control is based on LCS Crileria for duplicates are advisory only, unless otherwise specified in the method RPO not calculated ror LCS2 when different a concenlralion lhan LCS1 is used _ RPO not calculaled ror Duplicates when lhe result is not rive limes the MRL (Minimum Reporting Level) (S) -Indicates surrogate compound , (I) -Indicates internal slandard compound . Page 18 of 19 pages ~:-eurofin s I l Eaton Analytical QC Type MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK LCS1 LCS2 MBLK MRL_CHK MRLLW Tel: (626) 386-1100 Fax: (866) 988-3757 1 800 566 LABS (1 800 566 5227) South Lake Tahoe Public Utilities District Analyte trans-1,3-Dichloropropene Trichloroethylene (TCE) Trichloroethylene (TCE) Trichloroethylene (TCE) Trichloroethylene (TCE) Trichlorofluoromethane Trichlorofiuoromethane Trichlorofluoromethane Trichlorofluoromethane Trichlorotrifiuoroethane(Freon Trichlorotrifluoroethane(Freon Trichlorotrifluoroethane(Freon Trichlorotrifluoroethane(Freon Vinyl chloride (VC) Vinyl chloride (VC) Vinyl chloride (VC) Vinyl chloride (VC) Vinyl chloride (VC) Spike recovery is already corrected for nalive resulls Spikes which exceed Limils and Method Blanks with positive results are highlighted by Underlining. Native Spiked Recovered 0.5 0.630 5 4.45 5 4 .26 <0 .5 0.5 0.520 5 4.41 5 4.45 <0 .5 0.5 0.490 5 4.64 5 4.47 <0 .5 0.5 0.500 5 4.65 5 4.42 <0 .3 0,5 0,510 0 25 0.260 Laboratory QC Report: 856471 Project: DRINKING Group: VOCS plus Oxygentates Units Yield(%) Limits(%) RPDLimit (%) ug/L 126 (50-150) ug/L 89 (70-130) ug/L 85 (70-130) 20 ug/L ug/L 104 (50-150) ug/L 88 (70-130) ug/L 89 (70-130) 20 ug/L ug/L 98 (50-150) ug/L 93 (70-130) ug/L 89 (70-130) 20 ug/L ug/L 100 (50-150) ug/L 93 (70-130) ug/L 88 (70-130) 20 ug/L ug/L 102 (50-150) ug/L 104 (50-150) Criteria for MS and Dup are advisory only, batch conlrol is based on LCS Criteria for duplicates are advisory only, unless otherwise specified in the method , RPO not calculaled for LCS2 when different a concenlralion than LCS1 is used RPO not calculated for Duplicates when the result is not five limes lhe MRL (Minimum Reporting Level) (S) -lndicales surrogale compound (I) -lndicales inlernal standard compound RPD% 44 0.90 37 5 1 Page 19 of 19 pages Alpine County Summary Report Temp pH EC DO Alk TDS ss Turb Chloride Sulfate ACMW--01AW OV09/2020 Main Dam 10.4 6,70 72,0 33,0 72 1,56 1.26 ACMW--01BE OV09/2020 Secondary Dam 8 ,1 6.64 78 .0 36.0 82 1.35 1 85 ACMW--02N OV09/2020 Access Gate 12,3 6 51 125 57,6 97 2,11 2.79 ACMW--02S OV09/2020 Access Gate 11.8 6 .25 123 58.7 94 1.72 1.59 ACMW--04W OV09/2020 Gansberg 114 6 .38 182 40 .8 136 17.8 14.8 ACMW--06S OV09/2020 Celia 11.9 6 99 726 274 458 65.3 20.1 ACMW--08N 02/1 V2020 Diamond Valley Ranch 11.2 6 .64 149 81,0 111 1.33 0 .909 ACMW--09D 02/20/2020 Diamond Valley Ranch 11.7 6 .57 79.0 34.4 82 2.1 1.33 2 .20 ACMW-10 02/20/2020 Diamond Valley Ranch 11.8 6 38 175 76.4 134 0 .5 5.43 4 .55 ACMW-11 02/20/2020 Diamond Valley Ranch 10.1 6.28 105 29.7 87 2 .1 1.99 5 .28 ACMW-12 02/1 V2020 Diamond Valley Ranch 10.9 6.45 109 47.2 54 1.53 2 .22 ACMW-13 02/1 V2020 Diamond Valley Ranch 100 6 09 143 52.1 107 4.47 2.78 ACMW-14 02/20/2020 Diamond Valley Ranch 10.4 6.00 70.0 34.6 68 38 0 .984 1,99 ACMW-15 03/30/2020 Diamond Valley Ranch 11.9 6.11 65,0 31.1 56 0 .982 1.65 ACMW-16 03/30/2020 Diamond Valley Ranch 10.1 6.21 141 67.9 103 2 .00 1.74 ACMW-17 03/30/2020 Diamond Valley Ranch 9.3 6.40 108 42.2 83 4 .99 2 .85 ACMW-18 03/30/2020 Diamond Valley Ranch 10,6 6 .59 80.0 34.2 68 2.59 1.92 ACMW-19 03/30/2020 Diamond Valley Ranch 10.4 6 .83 179 91.5 125 2 .80 2.28 ACMW-20 02/1 V2020 Diamond Valley Rd -10.5 6 .02 88.3 32.6 66 2.41 2.16 Paynesville ACMW-21 OV30/2020 River Ranch Rd 8.5 6 ,64 70.0 29.9 63 2 .50 2.58 ACMW-22 OV30/2020 Fredericksburg Ln 12.0 6 .33 96 .0 38 .5 82 1.54 2.86 ACMW-23 OV30/2020 Scott Brooke's Ranch by 14.4 7.32 372 177 269 3 .94 19.6 Irrigation Ditch ACMW-24 OV30/2020 Scott Brooke's Ranch by 13.2 6 .63 525 161 347 34.9 47.0 Irrigation Ditch ACMW-25 OV30/2020 Access road between 10 .2 6.45 153 48 .2 119 8 .56 6 .07 Neddenriep & Brooke ranches ACMW-26 OV30/2020 Access road between 9 .7 6.41 211 55.8 149 21.3 8 .00 Neddenriep & Brooke ranches CONTROL OV08/2020 East side near Post Office 8 .0 7.48 259 19.9 GW-05 02/20/2020 Neddenriep 7.0 6 .31 258 61.5 176 27.9 9.74 GW-08 02/20/2020 Arant Ranch house 12 .2 6 .19 338 46.1 221 42.4 11.0 GW-11 02/1 V2020 Diamond Valley School 11.3 6 ,78 144 69 .7 113 0.964 0 .696 GW-17 02/1 V2020 Diamond Valley Ranch House 10 .5 6.25 137 62.5 101 1.59 0 .712 Well HPR OV06/2020 Harvey Place Reservoir 3 .5 8 .12 614 6.03 173 269 6.20 4.4 58.1 19.4 02/05/2020 Harvey Place Reservoir 22 8 .13 618 14.80 176 264 12.6 6.0 56 .0 18.8 03/04/2020 Harvey Place Reservoir 7.0 8.82 602 16.80 182 265 16.0 72 55.4 178 HVC-1 OV23/2020 HVC@ Pioneer Trail 1.9 6 .90 57.2 0.796 02/26/2020 HVC@ Pioneer Trail 3 .0 7 .07 61.8 0.895 03/12/2020 HVC@ Pioneer Trail 3 .6 6 .85 48.0 0.827 HVC-2 OV23/2020 HVC 250' Upstream Pond #2 1.4 6 .08 58.4 1.22 02/26/2020 HVC 250' Upstream Pond #2 4.2 6 .35 58.4 1.78 03/12/2020 HVC 250' Upstream Pond #2 5 .0 6 .76 50.0 2.07 Results resported as mg/L except EC as uS/cm Turbidity as NTU Colifoms as MPN/100ml Temp asC NC = Not counted Page 1 of 8 HVC-3 02/26/2020 03/12/2020 MW01__5 OV08/2020 MW02-50 OV08/2020 MW03-50 OV08/2020 MW04-50 OV09/2020 MW07-50 OV08/2020 MWOS-25 OV09/2020 MW11 OV09/2020 MW12 OV09/2020 MW13 OV08/2020 SW-01 OV03/2020 02/05/2020 03/03/2020 03/04/2020 SW-02 03/03/2020 SW-03 03/03/2020 SW-04 03/03/2020 SW-05 OV03/2020 02/05/2020 03/03/2020 SW-06 OV03/2020 02/05/2020 03/03/2020 SW-08 03/04/2020 Results resported as mg/L excepl EC as uS/cm Turbidity as NTU Colifoms as MPN'100ml Temp as C NC = Not counted Temp HVC 25' Downstream of 0-70 Meadow Crest HVC 25' Downstream of 38 Meadow Crest SW corner of ERB 80 South side of ERB Pond 89 Southwest corner of ERB Pond 9 1 Hank Monk side of ERB 76 North side of ERB Pond 70 South of Pond 1 9.2 North of Biosolids building 8.3 South of Biosolids Building 8.7 South of Pond 2 along HVC 6,3 Carson River Woodfords 0.80 Carson River Woodfords 0.70 Carson River Woodfords 1 2 Carson River Woodfords 2.2 Indian Creek Upper 1.8 Indian Creek Mid 5.0 Indian Creek Lower 4 .3 Carson River Paynesville 1.9 Carson River Paynesville 0 .10 Carson River Paynesville 3.0 Carson River Stateline 2.0 Carson River Slaleline 0.30 Carson River Stateline 26 Irrigation Ditch 1.7 Alpine County Summary Report pH EC DO Alk TDS ss Turb Chloride Sulfate 6.66 66 .8 2.14 6 98 56 ,0 2 38 719 172 1 85 6.86 287 29.4 6 64 367 59.3 6 49 82.0 646 6.98 181 10.7 6 60 791 25.7 6 25 173 no 6.67 319 13.4 7.80 609 39 .5 7.31 79 .0 12.60 35.4 47 0.60 0.72 1 84 1.92 7.61 78.8 11.70 34.4 63 0.1 0.50 2.28 2.18 8.61 76.1 11.70 0.78 2.22 2.28 7.83 76,5 1t20 36 0 65 0.98 0.91 8.61 83,5 11.40 46 .5 72 19.8 4,0 0.991 0.600 814 193 9,92 48 5 140 1.32 3.8 4.13 3.41 8.41 149 1t30 79 3 114 3.20 3.1 2.76 2.16 7.14 90 .0 13.10 39.5 64 0.62 0.75 2.46 2.46 8.11 87.2 1240 38.5 71 1.70 0.98 265 2.52 8.26 78 .5 11.50 37.6 67 1.26 0.87 2.28 2.39 7,77 95,0 13.50 40.4 58 0.22 0.65 280 2 ,66 7.83 90 ,7 12,30 39.2 67 4.00 1,2 2.89 2.68 8.45 80,7 11.90 38 2 65 1.52 1 a 2.41 2.43 8.03 124 1060 61.3 111 12.3 3.9 1.72 3.39 Page 2 of 8 Alpine County Summary Report Total P Total P P04-P NHJ-N Total N N02-N NOJ-N TKN Dissolved ACMW-01AW OV09/2020 Main Dam 0.024 0.021 <0 .020 0.145 <0 .010 0.137 <0 .100 ACMW-018E OV09/2020 Secondary Dam 0 031 0 035 <O 020 0.181 <O 010 0 167 <O 100 ACMW-02N OV09/2020 Access Gale 0 024 0.020 <0 .020 0.658 <0 .010 0.674 <0 .100 ACMW-02S OV09/2020 Access Gale 0 .017 0.014 <0 .020 <0 .100 <0 .010 <0 .010 <0 .100 ACMW-04W OV09/2020 Gansberg 0 018 0 017 <O 020 1.42 <0 .010 1.48 <O 100 ACMW-06S OV09/2020 Celia 0 161 0 124 <0 .020 0 .333 <0 .010 <0 .010 0.333 ACMW-08N 02/1 V2020 Diamond Valley Ranch 0 .042 0.039 <0 .020 0 .520 <0 .010 0 .561 <0 .050 ACMW-09D 02/20/2020 Diamond Valley Ranch 0.050 0 .061 <0 .020 0 .702 <0 .020 0 759 <0 .050 ACMW-10 02/20/2020 Diamond Valley Ranch 0 038 0 044 <0 .020 0.707 <0 .020 0 761 <0 .050 ACMW-11 02/20/2020 Diamond Valley Ranch 0.024 0 .020 <0 .020 3 .23 <0 .010 3.28 <0 .050 ACMW-12 02/1 V2020 Diamond Valley Ranch 0.035 0 .030 <0 .020 0 ,398 <0 .010 0.406 <0 .050 ACMW-13 02/1 V2020 Diamond Valley Ranch 0.021 0 .028 <0 .020 2 .16 <0 .010 2 07 0 090 ACMW-14 02/20/2020 Diamond Valley Ranch 0.024 0 .022 <0 .020 0 .308 <0 .010 0.371 <0 .050 ACMW-15 03/30/2020 Diamond Valley Ranch 0.028 0 .031 <0 .020 0 ,285 <0 .010 0.306 <0 .050 ACMW-16 03/30/2020 Diamond Valley Ranch 0.045 0.039 <0 .020 0.466 <0 .010 0.479 <0 .050 ACMW-17 03/30/2020 Diamond Valley Ranch 0 .024 0.023 <0 .020 0.761 <0 .020 0.828 <0 .050 ACMW-18 03/30/2020 Diamond Valley Ranch 0 .028 0.034 <0 .020 0 .556 <O 020 0.606 <0 .050 ACMW-19 03/30/2020 Diamond Valley Ranch 0 .093 0.104 0 041 0 .110 <O 010 <0 .010 0.110 ACMW-20 02/1 V2020 Diamond Valley Rd -0 .063 0 .062 <0 .020 0.460 <0 .010 0.434 <0 .050 Paynesville ACMW-21 OV30/2020 River Ranch Rd 0 .069 0.076 <0 .020 0.223 <0 .010 0.068 0,155 ACMW-22 OV30/2020 Fredericksburg Ln 0 .020 0.017 <0 .020 1.18 <0 ,010 1.12 0 ,060 ACMW-23 OV30/2020 Scali Brooke's Ranch by 0 .034 0.028 <0 .020 1.03 <0 .010 1.00 <0 .050 Irrigation Ditch ACMW-24 OV30/2020 Scott Brooke's Ranch by 0 ,077 0,071 <0 ,020 2.44 <0 ,010 2,33 0 ,110 Irrigation Ditch ACMW-25 OV30/2020 Access road between 0 .048 0.040 <0 .020 2.28 <0 .010 2.25 <0 ,050 Neddenriep & Brooke ranches ACMW-26 OV30/2020 Access road between 0 .080 0_077 <0 .020 1.97 0.034 1.78 0 156 Neddenriep & Brooke ranches CONTROL OV08/2020 East side near Post Office <0 .010 4 .56 GW-05 02/20/2020 Neddenriep 0 ,028 <O 010 <0 .020 4 .34 <0010 4,24 0 .10 GW-08 02/20/2020 Arant Ranch house 0 .040 <0.010 <0 ,020 9 .85 <0 .010 10 .5 <0 .05 GW-11 02/1 V2020 Diamond Valley School 0 .049 0 .043 <0 .020 0.460 <0 .010 0.493 <0 .050 GW-17 02/1 V2020 Diamond Valley Ranch House 0 ,017 0 012 <0 .020 0 .553 <0010 0.553 <O 050 Well HPR OV06/2020 Harvey Place Reservoir 2 .69 2.58 24.4 28.9 0 .337 0,787 27.8 02/05/2020 Harvey Place Reservoir 2.97 2 .28 25.3 28.1 0 .277 0.669 27.2 03/04/2020 Harvey Place Reservoir 2.62 2.44 25.7 27.4 0 .260 0.615 26.5 HVC-1 OV23/2020 HVC@ Pioneer Trail <0 .020 0 .114 <0 ,010 0 .046 <0 ,100 02/26/2020 HVC@ Pioneer Trail <O 020 0 .165 <O 010 0 .089 <0 ,100 03/12/2020 HVC@ Pioneer Trail <0 .020 0 .096 <0 .010 0.046 0 .050 HVC-2 OV23/2020 HVC 250' Upstream Pond #2 <0 .020 0 .217 <0 .010 <0.010 0 .217 02/26/2020 HVC 250' Upstream Pond #2 <O 020 0 .186 <0 .010 <0 ,010 0 ,186 03/12/2020 HVC 250' Upstream Pond #2 <0 .020 0 .156 <0 .010 <0 .010 0 .156 Results respo1ted as mg/L except EC as uS/cm Turbidity as NTU Colifoms as MPN/100ml Temp as C NC = Not counted Page 3 of 8 HVC-3 02/26/2020 03/12/2020 MW01_5 OV08/2020 MW02-50 OV08/2020 MWOJ-50 OV08/2020 MW04-50 OV09/2020 MW07-50 OV08/2020 MWOS-25 OV09/2020 MW11 OV09/2020 MW12 OV09/2020 MW13 O'V08/2020 SW-01 O'V03/2020 02/05/2020 03/03/2020 SW-02 03/03/2020 SW-03 03/03/2020 SW-04 03/03/2020 SW-05 OV03/2020 02/05/2020 03/03/2020 SW-06 OV03/2020 02/05/2020 03/03/2020 SW-08 03/04/2020 Results resported as mg/L except EC as uS/cm Turbidity as NTU Colifoms as MPN/100ml Temp asC NC = Not counted Total P HVC 25' Downstream of Meadow Crest HVC 25' Downstream of Meadow Crest SW corner of ERB South side of ERB Pond Southwest corner of ERB Pond Hank Monk side of ERB North side of ERB Pond South of Pond 1 North of Biosolids building South of Biosolids Building South of Pond 2 along HVC Carson River Woodfords 0.014 Carson River Woodfords 0.015 Carson River Woodfords <O 010 Indian Creek Upper 0.023 Indian Creek Mid 0 .062 Indian Creek Lower 0 ,042 Carson River Paynesville 0 ,014 Carson River Paynesville 0 .017 Carson River Paynesville 0 .014 Carson River Stateline 0 .017 Carson River Slateline 0.023 Carson River Stateline 0.014 Irrigation Ditch 0 .191 Alpine County Summary Report Total P P04-P NH3-N Total N N02-N N03-N TKN OissQl ved <0 .020 0 .197 <0 .010 <0.010 0.197 <O 020 0 .148 <O 010 0.011 0.167 <O 010 0 379 <0 .010 2.47 <O 020 0.427 <0.010 0048 <0 .010 0.453 <0_010 0 .074 <0010 0 030 <0 .020 0 .965 <0 _010 0 .969 <O 010 <0,020 0,102 <O 010 0 012 <O 10 <0.010 <0.020 0 ,134 <0,010 <0 ,010 0.134 <0,010 <0.020 0 139 <0 _010 <O.Q10 0.139 <0.010 <0 .020 0 ,179 <0.010 <0 .010 0.179 <0.010 <0 .020 0 .150 <0.010 0.039 0.111 0.013 <0 .020 0 .280 <0,010 0,072 0,208 <0.010 <0 ,020 0115 <0.010 0.019 <0 .10 <0.010 <O 020 0134 <0010 0.015 0_119 <0 .010 <0 ,020 0 .143 <0.010 <0.010 0 .143 <0.010 <0 ,020 0 .173 <0.010 0.085 <0 ,10 <0.010 <0.020 0 .204 <0.010 0.056 0 .148 <0 ,010 <0020 0 .170 <0 .010 0.030 0 .140 0.027 0.096 1.29 <0 .010 0.111 1.18 Page 4 of 8 HPR OV06/2020 Harvey Place Reservoir 02/05/2020 Harvey Place Reservoir 03/04/2020 Harvey Place Reservoir Resulls resported as mg/L except EC as uS/cm Turbidity as NTU Colifoms as MPNl100ml Temp as C NC = Not counted BOD 8.76 124 11.4 Alpine County Summary Report Ca 19.4 19,1 19.0 Mg 4.63 4.54 4.46 Na 51.5 51.4 49.8 K 12.1 12.3 1t8 Page 5 of 8 SAR 2 73 2.74 2.67 %Na 574 57.7 57,2 Alpine County Summary Report Total E. Coli Coliform Chroma Chroma ACMW-01AW OV09/2020 Main Dam 1.0 <1 'ACMW-01BE OV09/2020 Secondary Dam <1 <1 ACMW-02N OV09/2020 Access Gate <1 <1 ACMW-02S OV09/2020 Access Gale <1 <1 ACMW-04W OV09/2020 Gansberg <1 <1 ACMW-065 OV09/2020 Celio <1 <1 ACMW-OSN 02/1 V2020 Diamond Valley Ranch 1 0 <1 ACMW-090 02/20/2020 Diamond Valley Ranch <1 <1 ACMW-10 02/20/2020 Diamond Valley Ranch <1 <1 ACMW-11 02/20/2020 Diamond Valley Ranch <1 <1 ACMW-12 02/1 V2020 Diamond Valley Ranch <1 <1 ACMW-13 02/1 V2020 Diamond Valley Ranch <1 <1 ACMW-14 02/20/2020 Diamond Valley Ranch 1.0 <1 ACMW-15 03/30/2020 Diamond Valley Ranch <1 <1 ACMW-16 03/30/2020 Diamond Valley Ranch 2 .0 <1 ACMW-17 03/30/2020 Diamond Valley Ranch <1 <1 ACMW-18 03/30/2020 Diamond Valley Ranch <1 <1 ACMW-19 03/30/2020 Diamond Valley Ranch <1 <1 ACMW-20 02/1 V2020 Diamond Valley Rd -<1 <1 Paynesville ACMW-21 OV30/2020 River Ranch Rd 2 .0 <1 ACMW-22 OV30/2020 Fredericksburg Ln <1 <1 ACMW-23 OV30/2020 Scott Brooke's Ranch by <1 <1 Irrigation Ditch ACMW-24 OV30/2020 Scott Brooke's Ranch by <1 <1 Irrigation Ditch ACMW-25 OV30/2020 Access road between <1 <1 Neddenriep & Brooke ranches ACMW-26 OV30/2020 Access road between 20.3 <1 Neddenriep & Brooke ranches GW--05 02/20/2020 Neddenriep <1 <1 GW--08 02/20/2020 Arant Ranch house <1 <1 GW-11 02/1 V2020 Diamond Valley School <1 <1 GW-17 02/1 V2020 Diamond Valley Ranch House <1 <1 Well HPR OV06/2020 Harvey Place Reservoir 6 1.3 <1 02/05/2020 Harvey Place Reservoir 74 <1 03/04/2020 Harvey Place Reservoir 12.2 <1 SW-01 OV03/2020 Carson River Woodfords 32.3 2.0 02/05/2020 Carson River Woodfords 29 2 1 0 03/03/2020 Carson River Woodfords 24.3 <1 Results resported as mg/L except EC as uS/cm Turbidily as NTU Colifoms as MPN/100ml Temp as C NC= Not counted Page 6 of 8 SW-02 03/03/2020 SW-03 03103/2020 SW-04 03/03/2020 SW-05 01/03/2020 02/05/2020 03/03/2020 SW-06 01/03/2020 02/05/2020 03/03/2020 SW-08 03/04/2020 Results resported as mg/L except EC as uS/cm Turbidity as NTU Colifoms as MPN/100mL Temp as C NC = Not counted Indian Creek Upper Indian Creek Mid Indian Creek Lower Carson River Paynesville Carson River Paynesville Carson River Paynesville Carson River Stateline Carson River Stateline Carson River Stateline Irrigation Ditch Alpine County Summary Report Total E.Coli Coliform Chrome Chrome 69 .7 2 ,0 836 1,0 117 6.3 57.3 27.8 26 .2 <1 90.5 <1 81 .6 5,2 104.3 5 .2 73.3 1.0 1410 <1 Page 7 of 8 HPR 0'1'06/2020 02/0512020 03/04/2020 Resulls resported as mg/L except EC as uSlcm Turbldlly es NTU Coll,oms as MPI\V1 OOmL Temp as c NC .. Not counted ::oloniea Harvey Place Reservoir Harvey Place Reservoir Harvey Place Reservoir Alpine County Summary Report ;oloniea FIiaments FIiaments Filaments Filament Single # #Cells #Multi-# Cells # Single-Length Cells Celled Celled 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Page 8 of 8 Page 1 of 1 Monitoring Wells Groundwater Elevation J Site Location Sample Hr ID# Depth Ref GW Date toGW MSL MSL ACMW-01AW Main Dam 01/09/2020 11 :52 AG70298 6.90 5493 .13 5,486.23 ACMW-01BE Secondary Dam 01/09/2020 11 :27 AG70299 7.71 5503.55 5,495 .84 ACMW-02N Access Gate 01/09/2020 12:31 AG70300 8.36 5469.70 5,461 .34 ACMW-02S Access Gate 01/09/2020 12:13 AG70301 10.15 5471.60 5,461.45 ACMW-04W Gansberg 01/09/2020 10:17 AG70302 18.98 4919.89 4,900.91 ACMW-06S Celia 01/09/2020 10:47 AG70303 3.95 5223.50 5,219.55 ACMW-08N Diamond Valley Ranch 02/11/2020 10:49 AG70732 4.71 5464.45 5,459.74 ACMW-09D Diamond Valley Ranch 02/20/2020 11:57 AG70860 33.54 5510.56 5,477.02 ACMW-10 Diamond Valley Ranch 02/20/2020 12:33 AG70861 32.00 5534.19 5,502.19 ACMW-11 Diamond Valley Ranch 02/20/2020 11 :25 AG70862 22.10 5503.01 5,480.91 ACMW-12 Diamond Valley Ranch 02/11/2020 11 :26 AG70733 32.21 5525.04 5,492.83 ACMW-13 Diamond Valley Ranch 02/11/2020 12:17 AG70734 10.79 5554.55 5,543.76 ACMW-14 Diamond Valley Ranch 02/20/2020 10:45 AG70863 17.63 5547.20 5,529.57 ACMW-15 Diamond Valley Ranch 03/30/2020 11 :12 AG71298 22.40 5500.60 5,478.20 ACMW-16 Diamond Valley Ranch 03/30/2020 11:34 AG71299 13.32 5484.53 5,471.21 ACMW-17 Diamond Valley Ranch 03/30/2020 12:02 AG71300 17.05 5504.92 5,487.87 ACMW-18 Diamond Valley Ranch 03/30/2020 12:34 AG71301 8.69 5470.56 5,461.87 ACMW-19 Diamond Valley Ranch 03/30/2020 13:08 AG71302 7.84 5417.25 5,409.41 ACMW-20 Diamond Valley Rd -Paynesville 02/11/2020 10:10 AG70735 15.41 5090.30 5,074.89 ACMW-21 River Ranch Rd 01/30/2020 09:19 AG70570 14.10 5011.33 4,997.23 ACMW-22 Fredericksburg Ln 01/30/2020 09:46 AG70571 29.19 5019.28 4,990.09 ACMW-23 Scott Brooke's Ranch by Irrigation 01/30/2020 11 :29 AG70572 19.05 4978.35 4,959.30 Ditch ACMW-24 Scott Brooke's Ranch by Irrigation 01/30/2020 12:02 AG70573 26.91 4953.25 4,926.34 Ditch ACMW-25 Access road between Neddenriep & 01/30/2020 10:44 AG70574 8.80 4942.24 4,933.44 Brooke ranches ACMW-26 Access road between Neddenriep & 01/30/2020 10:21 AG70575 13.20 4895.60 4,882.40 Brooke ranches CONTROL East side near Post Office 01/08/2020 16:12 AG70280 62.60 6345.20 6,282.60 MW01 _5 SW corner of ERB 01/08/2020 09:57 AG70281 59.10 6328.00 6,268.90 MW02-50 South side of ERB Pond 01/08/2020 10:58 AG70282 45.88 6314.60 6,268.72 MW03-50 Southwest corner of ERB Pond 01/08/2020 11 :19 AG70283 41.40 6310.10 6,268.70 MW04-50 Hank Monk side of ERB 01/09/2020 14:16 AG70305 34.15 6304.40 6,270.25 MW07-50 North side of ERB Pond 01/08/2020 10:25 AG70284 22.86 6302.20 6,279.34 MW08-25 South of Pond 1 01/09/2020 16:20 AG70306 11.58 6258.30 6,246.72 MW11 North of Biosolids building 01/09/2020 15:50 AG70307 27.65 6296.00 6,268.35 MW12 South of Biosolids Building 01/09/2020 15:23 AG70308 24.21 6288.80 6,264.59 MW13 South of Pond 2 along HVC 01/08/2020 15:34 AG70285 6.85 6263.40 6,256.55 Alpine County Soils pH EC %Sat TKN N03-N Total P Exch P 504 Cl S2A Celia Ranch 01/29/2020 8.16 4.23 68.3 2210 2.69 809 3 .70 75 1800 S3A Bently Ranch 01/29/2020 5.75 0.305 34.0 1150 1.88 874 8.57 11 325 S4A Gansberg Ranch 01/29/2020 7.42 2.46 30.6 1020 14.6 746 78.2 29 500 S5A Gansberg Ranch 01/29/2020 6.23 0.379 33.6 1490 4.92 873 4.94 2 400 S6A Neddenriep Ranch 01/29/2020 7.32 0.522 39.7 1730 13.3 620 9.75 2 425 S7A Bruns Ranch 01/29/2020 5.92 0.200 39.1 1930 3.28 871 9.89 3 325 CEC Cu Mo K Ca Mg Na SAR %Na S2A Celia Ranch 01/29/2020 30.3 11.7 0.04 1590 203 161 734 9.33 10.9 S3A Bently Ranch 01/29/2020 21.4 10.0 0.03 1040 16.9 5.62 24.3 1.31 <1 S4A Gansberg Ranch 01/29/2020 19.7 11.7 0.03 4520 53.0 30.7 125 3.38 3.51 S5A Gansberg Ranch 01/29/2020 17.2 9.2 0.05 1510 25.4 6.53 38.9 1.78 1.30 S6A Neddenriep Ranch 01/29/2020 16.9 14.2 0.03 2660 38.1 7.73 39.4 1.52 <1 S7A Bruns Ranch 01/29/2020 15.0 14.6 O.Q3 2980 12.7 3.11 9.79 0.640 <1 Page 1 of 1 Site HVC-5 SW-01 Sample Comments Date Time Comments 02/26/2020 14:39 Not flowing 03/04/2020 09:44 SW-01 collected in two separate trips March 2020 . 1 SOUTH TAHOE PUBLIC UTILITY DISTRICT EMERGENCY POND MW FIELD MONITORING RECORD Date: ()i ·]A· 2.r:...'": Samplers:_/.;_.,_L-____ _ p u rpo se : Temp Site ID# Time ·c ,., CONTROL ,-t'J, \ -;. /bll g,o 'i ~ 't ,ii)! ' 1J1.S1 So MW1.5 -' ... MW02~50 . bi . (-!~ \o5( B.9 ;,--.·;·')-- \(\~ q_\ \ }"I t • I MW03-50 ;~~(,'/ f .. rt' "J--f~i~o5 [l(I ~ 1-b MW04-50 :~ r, -J ""' : \01 c) -:/.0 MW07-50 t1lJ/ ',(. i• #;;-, f(;/,tJ3(JL .'" ,, ., ~ j~ ,/V MWOS-25 {,. i- MW11 JI, ?-, M-?mcq ;~~-o 1,3 IIJ._ /f-&J-C13 o1 C ......, MW12 /)}) 0 ...-' I ;, -, I ~. ,. I s3t..f H!J, vi~ .,. b ') MW13 . 1/y'-u, Trip Blank P.\J( ~ )~, Groundwater samples shall be collected only after 2 1 well volumes have been flushed and Temperature , pH . and EC measurements have sta bilized to approximately ± 5% for each successive measurement taken in intervals 2 5 minutes. File D l lab\Fo, rns\F1eld Sheets\F,eld ER~ doc Depth to Well Water Cale Well Casing Depth to Column Water to EC Bottom Diameter GW Height Purge pH µSiem ft inch ft ft Gallons u (' j (.(,: 1,~'6 1~'1 r,, .. ,; I,· : '). ; 80.90 2 1-t 1 ., ill :: ': !:') ' -\ \.. _) I ·'~' lo 65.80 2 {$' 'ZJ,1 ·f.,., r 1 C ', .~ ,. r, ()_ ~--'<,<..., 50.90 2 t ) ~;j,( j ,J•-\,/• I,. 6. (w %1 50 .80 2 J 1 t :l.q,., 1. ~ 16 ~lj ~ 1 1J z. 51 .00 2 . ..,L(i 1r ) ' ) ~,1 2i1 ~At 1'61 ~ 'i.1 ~-~ Zt~( :-·1 52 .60 2 __. ( ! f, 1-C' I If (i 0 . f -,..... ~ ,tt· ; ! 'I.,' /,0 1,SS '< 20 .60 2 l ~ ~l~ (}3 "',...., I( '/ 3. If ,, 41.0 J--t, b.J L,) 2 I it~ ~10. I J --1' ), l 31 .50 p i 1.)1, 1.3 rtzt; .,. ; ' 2 V ' J. so b01 .. ~ . . ,. 1 ') i -., 14.40 2 ._, I j Gallons to flush = 1 x 7.48 x 3.14 x 0 .0832 x water column height Gallons to flush= 0.17 x water column height (ft) Water column height= depth of well -water level for 50' well whose water level is 35 feet from ground level: Water column height = 50' -35' = 15' j ~ O\ -L{ -1.J(f ;; -; ' I. I. ,1-~;) 1, / 1 o l-LL / f; C I Preservative Std Check Actual Water .Q1 0 c5 Purged u ~ Cf) <( 0 £ z ~ oH EC COMMENTS Gallons -<fl I ·~ JS 6 2-s /• {S >. ~ _, ,., ' ,/'-£.. • ./1 ~ V J,s- s pH Std Check uses a 7.00 buffer. pH meter must be re standardized if result e xceeds 7.00 ± 0.05. EC Std Check' uses a 200 µSiem standard "' 10/14/)0JS Well ·"'-'1 · .. / 1 I . " .. ..,. i I Time -. I ., ' -,=:. . , ' _, "'· ,, :~ ~ J' ·1 . , , ' ' /)') J 'C, 1 (1 I I ~·j ; ., : I . ' I tr\ t..- / l J t f ' I I I !I({· ; I'--, i \,. IC !;'0 I ' 1,;07 r. ,... I I h I , /,; iS f '~ I 't i {._J i--) , efJ/ ,· I ~z,i 1·• i"> ')(I, I 'i j { Minut es Flushed ,-· '} I ' 1 r:) ' 1 tJ '. ) j U s \'.) u ,.1 I L( J Cf j I '/ ' ! 1 3 J • Flushing Record Gallons Flushed I· -::; .) ll I Li (' ; I r· ) 'l C .,, . .:, Temp oc ±5% ... i ,. !, '\ { •./, - •' "; -1 • v' ' 'fl ,-~ ',. v l'"J ). ·'1 1/. ' 9 i V • q,l I ,, 0 ; ' ' "j ' l ' " -'~ pH ±5% ' \I " t: . ./ .,, \(j + ' i ( ., I c f ·~ ( (' ,/. o I .I ;' l'J 1c-1 I I " i. ,, f~ ; ) I )~ i :, . ., lei ~;j ~ ~1\ , ; ; 7\ 1-vi,• ? --, ) Ii./ r / / (/. I t,;;, 1..:·, ' / ' J f ,U f J.; I J 'J ·, ,' ') // £- <' '6 0 ' ~ .. ;-I I ' ' ' ,.., ! n ,·! 0-,) ., ' f) ' '· ') l' j ~ ., • ) EC µS ±5% t :: I . l I . " I ! .i l J G,. iJ i ) ' I ',,..,, . l\ I \ .... ··t:u ~ l ' ~ (,/j , .... t / q_,1 i-v-I ..., ( ., J ,::C i -~, 1 ( .'...; r,./,. I 't') ; '!:J / ,.,,.~ ;-,i I <Z I u r [ I Z ,<) / .. b '-, , I ~-,., ; i Sampler I Date t?} C omments -'f I ,( •. f l,. I~ t , • ' I I.,, I ' -I~~ 'I L"'.)·c: ~ t , \ ., ...-\ t' I r ' f 1 • -, • ) ~- ,.,-,7 fr /.-1-"" flushlng Rec,ord Date . -------- I Temp EC M inutes Gallons oc pH µS Weil Time Flushed Flushed ±5% ±5% ±5% Sam p ler Comments '~) <l I I b .1-~ 1 ·itr¥ (~ 1 I r, I. i/v~ v) : ! ,, ,,, l r {1 ~ I ") i' l, I 14. I ! \.) I i I ' J' 1., ti· t,--..' (l ( I i .. l~ n -( C1 ' L; . -· ,-·; A-QC(' j ?J.· ,,I .. v 'c . ·-_, "f I'(.) l /11.G ' Lf . .., r· " ..... , I t /1 'l -f I (. 1(1 b· :) -;., i,-"'<> .-t, i l I . I I I I 1\Jotc:! Te.no ::,H, c::C .-iust staool•z:e ±:>Ji') f"or suc::ess1ve ~easureme,its tai.:en in intervals ') :111nutes p u rpose : Depth toGW ID# Site Time ft AG.t -! • l1SZ I:/{ 0 ~CMW-01AW b, -c..l, \(7 .. 1 ACMW-01BE 1.11 :; ,-., ... t\!J i l . . 12~; f ·;0 ACMW-02N AGt ~ ! 12.1'~ [C 1; ACMW-02S ACMW-04W "r 1 V. , /_ tull it ,q'c ~r f.\lJ ~ -(()'..11 '3~5 ' ~CMW-06S -.... -' l ' 11 o~oo iTrip Blank IJ ~ rr emperature of Control ..:.c;,. .!00@!. when samples received =· 11 at Lab Gro undwater samples shall be collected only after 2: 1 well volumes have been flushed and Temperature , pH , and EC measurements have stabilized to approximately± 5% for each successive measurement taken in intervals 2: 5 minutes. n \I -:,t,\t"n1 m <:l l=1olt'i ~hc.ol<:\\:",olr-1 Arl'IJl\/\1 rlrv• SOUTH TAHOE PUBLIC UTILITY DISTRICT ACMW FIELD MONITORING RECORD / t,11.,ol ~\ uu Date: [ i · c0 \· Samplers: 1'ilL , e-- PreseNative Std Check Depth to Well Water Cale Actual Well Casing Column Water to Water Q) Temp EC Bottom Diameter Height Purge Purged I,) ~ H,SO, r5 ~ ft Gallons Gallons oH = z ~ oH EC COMMENTS oc pH µS/cm ft inch ... Cfl J: iO\.-\ f ,.+0 1l- 22 .6 2 \S .1 .. ....., L.1 s \ \() 'b \ b.6Ll n 1 1-1..? 23 .8 2 /1.?iD1 2.7 '.\f 12.') ~ :>I \7S 2t; ,74-4,":i (/~ 34 .1 2 11.i 6 -z.s \ z-z, it .7S -; \.\...i 21.9 2 2 .G ( 1.--1 'St> fl ' I ... /r f '~ 1.7 ,.1...r 29.0 2 ._, ut... 11. q l Ji 1H (., ,J J')~5 l{ 4 29 .9 2 ,,.~ ·~ ., ,· ~"" ,. I~ ' f' 11;1~{:-:-., ... h ... "I';~ 1..ii 1-1·-• "' ' L --·; ~ h .. -.. Gallons to nush = 1 x 7 .48 x 3.14 x 0.083.c x water column height pH Std Check uses a 7.00 buffer. pH meter must be re-Gallons lo fl ush = 0 .17 x water column height (ft) standardized if result exceeds 7.00 ± 0 05 EC Std Check Water column height= depth of well -water level uses a 200 µSiem standard for 50' well whose water level is 35 feet from ground fever: Water column height= 50' -35' = 15' Date t I · C /1 . lt ' Temp EC >1·~·, .. ~inutes Gallons qc / "pH 1,1S • Well Time lushed Flushed ., t 5o/o Ho/o j: 6% 1,~ 'l L.-Sampler' Cohtmeots ·· t\l\\\ w t'.4v~ /1, C 1 :;; I 1 "\ ~. i) ~ ~ lJ ';, t~~ ·-' ML i <;,..:. :,1 c1 r -t I l,('<l jJi Z ~ ,')). ·• J //. r-/ [ . .11-L 1c2 ,. i ~\·1 I , i . .., Lt I I ' Lf ~, 3i 1 r .. I \1 4 ( "; ' • ,._ tr.-~ 1 <..'., ') ( (l,3 u-_cr7 724-1c:A.; I ! 10 1Jl ' 1"'\\: J ''\ j. ,J L 0 ·,;tu : ~4~ iO ~ 11 I/ I • iJ • (' i,; l., I II 1~0 1 ,', y J_.1/ 1c11 1( l , l ! 'l b (' (;' l l 121c,, z LJ; AcfV\v'v · cl g( \l \ 7 2 I 7,tJ 7, zt n.? f .'LI C::::.tn y·t;. \\ \ s il21 1-l\ 0.0 ' Vi 14 1t'5 111·1 \ 2. 7 '6 · i (~4 ·, 5 1· <t B~- ACJ.:.\1v. 01 :.v1/ l \ 1/ 'Z. ? ·1 q,1 ~. r; i ·+} 7.7 J S'tttfc. u; r 1 I llr 1.0 ' iD V l r, 7 z. (.)1 ~ 115; 15 g ID . 4 C 7J 1l l. l(j - r\cM \J\J · c/L'S · 1 4W .. "" . b·sl 1n l1b S'ri\11 t 1:2.oc; kV ·2 t 11 .:J I "·) '1 I '-i { 3 li.~ ~-,-is I z.; ],2,\ Acrvtw .. 02.rJ 12-U 2, I j 2.7 b '70 11£ ·~_)/ ~Yt 121'1 i'i7-l~ 1 /') ) 11. ~ b 01 h l/ j.5$ 113 l ,/') I s, l " '"Jl I z. ~ I or· IL. b ,L.J Y. J Note Tem.o oH EC must stabilize ± 5 '% ror successive me.asuremen\s taken in Jntervea.1-1 > 5 minutes Group 2 p uroo se : Depth toGW Site ID# Time ft ACMW-21 A"~ ..... bi,1) 0~1 ~ \Y \0 ACMW-22 AG7C5 , I o9Y£ Q!i. l1 ACMW-23 AG7C5/:~ \1'2. q l"l,DS ,._ r.. 7 r-r-~ ·, A!-L'). • ACMW-24 rJ! \' f ,.... 1201.. 2fv.:11 fl A ,('~···· i qjO AI.J IV/)/i1: lO~ ACMW-25 '~" ,--, /"• ,-. ·-~ .-·- ACMW-26 Rulli)/) \DZ.I \~:W Trip Blank ··--r·-... A' • " lJ V/ I.: ~,i ~ D !Temperature of Control ".S, lrntial when samples received BJ JJ,0 at Lab Grou ndwater samples shall be collected only after 2 1 well volumes ha ve been flushed and Temperature, pH, and EC measurements have stabilized to approximately± 5% for ,each successive measurem ent taken in intervals > 5 minutes. ~.'l<:ab1Forms \F 1eld SheetslField ACMW-20 _to _<6 doc SOUTH TAHOE PUBLIC UTILITY DISTRICT ACMW FIELD MONITORING RECORD Depth to Well Water Cale Actual Well Casing Column Water to Water Temp EC Bottom Diameter Height Purge Purged $;) Inch ft ft Gallons oc oH uS/cm ft .,. i.s 10 1'S t! 8 b 64 . • I Z.t 30.0 2 \1.0 b.;~ q6 ;c:;,,j S". 1, l z. 59.5 2 \l{.Ll. i-~l 312 30.qi; t;,3 \0 50.0 2 1s.-z... b.b':J szs 2{01 ~.q s 50.0 2 ~ 10. 'Z. b.L\":i IS~ 1,.1.. \t 30.0 2 q,1 ~~\ i 1\l \Lo 2.iC: s: 30.0 2 \ Gallons to flush = 1 x 7.48 x 3.14 x 0 .083"2 x water column height Gallons to flush = 0.17 x water column height (ft) Water column height= depth of well -water level for 50' well whose water level is 35 feet from ground level : Water column height= 50' -35' = 15' Date: Cl · 3o· 41' Samplers: <7~~/ IY\L- Preservative Std Check f>t, (I} 'c H,S04 c5 <( (I} z e pH EC COMMENTS :;:. nH-I lib On Ri ver Ranch Rd. East side of Hwv 88 (,~ On Fredencksbura Lane. near S7 (,~ Un~lream of SW-15 () ~ Downstream of SW-15 (,~ Beh ind Neddenriep's on Wests ide Lane. d ir1 rd between Hwv 88 and Carson R,ver r.~ On Wests,oe Lane ,6) S1a1al11 1e 1.6 pH Std Check uses a 7.00 buffer. pH meter must be re- standardized if result exceeds 7.00 ± 0 .05. EC Std Check uses a 200 µSiem standard Temp Minutes Gallons oc pH Well Time Flushed Flushed ±5% ±5% /1( J,,\ 0 J -z \ r, ,. I\.' u .-' I y, , (~), '_i J ~ ', ' -i \Mt: jf" '/\ \<\ '1'1 (~ {,), j .,. I' LI '<: . 6 ' 1\( j)'\ vu· '22-, ce-141 11 c; i I .C/ i.v· :7 / ,_h ccitb it I ·2, i2.c ~ .)?, '"l)"\ \N · 7 (_, ic l lc· ·2 '2~ C/, (. v.<B I ft\ -i s q.1 b ~ \ --iJ3r 3 I (-. 41 [\( iY11/\J 2s IQ 0 ) ~ l( t,/ B u. 10 l {;45 k;r'{) w . ' ·'h /:-, 0 \l l q 2-l, 0 14,i 1 . J;o i/2 t( 1 7 • () -1. 1 .. J 1'55 l\1.. ~ \1 1D ) /J 4 1. )l M;Y\VV 2-4-/I<; 2,, z ·2.-I :s . I (:,J{ 1!71 1 C. I~. 1. h b'-I J 1201 ll 5 , 1,.z l . (., 's ' Note: Temp, pH . EC must slo'tllhz.e J; 5 % for successive measurements taken 1n 1nlerva 1s ~ 5 m1nules D llab1Forms\F1eld Sheets\Monitor_Well_Flushing_Record doc Date: (;{ ;"';,:'' ' '£ t · EC µS ±5% Sampler Comments I i /' ('1~ q 'J. <; )) (-•i (<.. ',, i I \i lu ?1 CJ %nvt c;: .. { q ?.,f C/ /i.: 2i4 ~-~c;. \0 \ '\ ZI \ \ sz ~ · :2 10 7 6 ·,1-u·, -· 1 J v \<'.j'~ '37~ ~vt" fJllll 'j'17 31L Sit ~Y,t0 \\~ S:11 5Z'7 Group 3 p u rpo se : Depth Site ID# Time toGW ft - .... ACMW .. QBN l· .. , ,, lCo/1 ct .i I G7(--; t . l\'2(c, ACMW .. 12 ._ .L\ . -··1 ~-..... ~ l-Ul ACMW .. 13 'I\ Y:\ ' .. \ -. -1.IJ/ ' .J \0\0 ACMW~20 . (" ,i. \ , .. \. \ t .... "' GW .. 11 i'234 . :,~-r~ j!J.,6 . . ~ GW~17 ~ . -.. . • . tllcm Trip Blank Temperature of Contro l _"Q_ Jrii.tL~L when samp les received "2..-1 ·~ at Lab Groundwater samples shall be collected only after~ 1 well volumes have been flushed and Temperature, pH, and EC measurements have stabilized to approximately± 5% for each successive measurement taken in intervals> 5 minutes. n \l_ah\Fmms\F1eld She.,ls\Fielri ACMW-Group_3 ,dor. SOUTH TAHOE PUBLIC UTILITY DISTRICT ACMW FIELD MONITORING RECORD Depth to Well Water Cale Actual Well Casing Column Water lo Waler Temp EC Bottom Diameter Height Purge Purged () oc pH µSiem ft Inch ft Gallons Gallons : l \ -2. ~-~' \L\\ 70.1 2 l I j -''JI ' (I [l . i \ L\-I . \J I lD.\ ~.,r \~~ 73 .5 2 T -~ -···- {'"I' ~-C'\ \4J 20.0 2 -; .~ \ \ . ID v ~u,D !. L \ '\;, \~-~ ~ ,t2. ir~ 21 .5 2 ~ r u I ~ ,( ,_f .\; \ .... , 11.3 ~-.7€-144 I [C; <;, b.2~ [·~1 V \A· J Minimum gallons to flush= 1 x 7.48 x 3.14 x 0.083' x water column height Gallons to flush = 0.17 x water column height (ft) Water column height= depth of well -water level for 50' well whose water level is 35 feet from ground level: Water column height= 50' -35' = 15' Date:_1.:.....:--=-· _ ....... ·~-__ _ Samplers: be ',: .. --- Preservative Std Check a, 'c H2SO, 0 <I'. a, z ~ pH EC COMMENTS cf, pH-I I \_~ 6.tc-kt~ ./ '-Y V \~ ( ,.v ( ' Inn"'---"" Va""" no ----Q"'.ns \lo ' ii I ,.v v' \V pH Std Check uses a 7 .00 buffer. pH meter must be re- standardized if result exceeds 7.00 ± 0.05. EC Std Check uses a 200 µSiem standard q/20/2017 Flushinr Record Date 1'· 'l Temp EC Minutes Gallons •c pH µS Well Time Flushed flushed ±5% ±5% ±5% Sampler Comments \·~,IW~ ,, ~\ '.,, C , , 1 ~) ' -., t J r > \.:-• I / . -" .:..,-J v . ,r i, I j ~ I • I. ~ 1 :'I r 1 ~ . ' ~· ' .'\' !1 \ ~ ' ·~ l '·, i ·· ,~ ; 1\Uv'\VV c<c:1·N ·,·,H I) f,L ,., ·I \.: .\:'\ \Lj 'I Sinn\..''-"' I vt ·2 , .. 1 ( 'r'l ·7 \'1,c I!, 2. k .1L i ~~~ AUA\~. \'L \'·\\;:, J: ·' ,; a ; ~.1 I ,I, i (j,:.. ·r\1vt G \ l \ '\'·· ' \.I • l .,; ~ Ill\ t tt t\.t l 40 i~1 • i ~ \\ /.. ii IJ Iv 1 l.4~ l ~(\ ~eJ\~ . \~ !.\ 'ft j 1 0 t1L '.\i~ \fl-\\r.vt (<) Wi\ ilo \ n,,mo.,i'.\ rh,J \1.ft l.t ,r, ·t l ·v .:;. l-.t~ \l\ \-ti.~\.-p \~u :l ,211 11"\.[1 """ il\J\ .rr) c\vw 111t .tilt "' ' lQ -· ~~ I'\~ 11.4• \, ,_,. L,. i Note · Temp. pH, EC must stabilize± 5 % for successive measurements taken in interv81S > 5 mi nutes J \Lab\Forrns\Fiatd Sheels\Mon,tor_Well_Flushing_Record doc Group 4 SOUTH TAHOE PUBLIC UTILITY DISTRICT ACMW FIELD MONITORING RECORD p u ro ose: Depth to Well Water Cale Actual Depth Well Casing Column Water to Water to GW Temp EC Bottom Diameter Height Purge Purged ~ ID# Site Time ft oc pH uS/cm ft Inch ft Gallons Gallons v r .-. 1i !/ 5b 1-·-. ws·1-3351 11.1 [.St Ii ....., ') 5-\\JJ -. I· L. [, AC MW-09D 45 .1 2 . . .... -, ~. i; ( 1 ( '2 • f .. ; ('B1 )1,0 I\. '0 (\b j1S ACMW-10 V' .. ,.. l 38 .5 2 r~ r:-; II lf I I c / I 112 'S ,,, /0 \0. i (Z S \ 1>°5 3 ACMW-11 "-\' .. 1 1 . I ) LL ' 33.5 2 11' I ! -· I ' ' r~ ;"-~ (" ,,. I ot\S' \7.() roJ/ b,U{) ?0 !J i l~ ACMWm14 ;.i_J/1,. · '<· 11.'S 1 30.0 2 I-• , -: t 11) i;;j/ 2.')S p:;/ . l • i . i 000 - GW-05 ,-.., .. -('Ju f (. I ti , bt "( , l-, ,-i iv I ' ' )31> GW-08 ,J i ! lo -IL . L I'i f.;7' ~. I Trip B lank 1-\,¥ \_,,. ' 'is'~ V - Temper ature of Control ~ Jm!!fil. when samples received /-, _ML, at Lab () 1 Minimum gallons to flush= 1 x 7.48 x 3.14 x 0 .0832 x water column height Grou ndwater samples shall be collected only after 2: 1 well volumes Gallons to flush = 0 .17 x water colu m n height (ft ) have been flu s hed and Temperature, pH, and EC measurements Water column height= depth of well -water level have stabilized to approximately± 5% for each successive for 50' well whose water level is 35 feet from ground level: measu rement ta ken in intervals> 5 minutes. Water column height= 50' -35' = 15' D:\Lab \Forms\Foeld Shee ts\Field ACMW-G roup _ 4 doc Date: er·:_ -, '--l~ L ------- JI ·• ! Sam p lers:--!,./:..,.1'1 ..::.L-_i _-.,_;; _'-__ _ IM. O'l-i.l l.O Preservative Std Check QJ ·~ H,so. 6 <t: z ~ pH EC COMMENTS tr, p H= I 't .l(, \ .lp \.\0 /G 1-~ ,1 r I ·' lj t,jll i" ,--z 7-. i'i JV!?-i •' \ (p ' ~ t,~ L,, h .t/, () /J' VI.. ::y· it-I { (}Y' {', r ·c:• -l. '\A--L,(_ f iT l. ,u , riL { ;·.-:n-, :;,v~,, <C . -, 7 . - c1 I -r_ n l;[i. t' ( s:..-i. "'.__..z ,, (; }"<- I ! 1/ l_'i l') ( (_-, I~.} -'':5 pH Std Check uses a 7.00 buffer. pH meter must be re- standardized if result exceeds 7 .00 ± 0 .05 . EC Std Check uses a 200 µSiem standard 1/22/2016 I. ... Flush1n[ Record Da te:------ Temp EC Minutes Gallons oc pH µS Well Time Flushed Flushed ±5% ±5% ±5% Sampler Comments J r· ,., . i! l.l ~ . .c 1' c / /'i L . ',: \ ,.;'I :J \. •' r, I l.<. ' . •' ..,,-, : (1 ·t n .. ..., t: 1...? (., ,c·,u. ~ -t,.. (.I i f I 'J ../ . .,) ._; r:r (/\) ' (• .~ -l/ _/ I /; ~,(! 1 '1 "(_.t G.,t l, ~; y; I( . -lJ i1):f) ''.) ') iO .LJ I ., /-'i <Ji r ! ~ / .. , IDSL t I , , l ~,,VJ l , ,.;..; ,./1(~ ' ( :-. \ou,0 q, , ( ( I '7 ~, et ~() ,, I V V·> ., ;; (c:r 5· [) I 'I ,o u. ( 00 ·""111 1v b ..f\)1 P--l w\ iv 11 \/ 2.l' 3 I 1( \_ 11 > b '1,c ' . I i l y I/ I '::J ( ' ~ J -ti, --. I/ 1. 5" c6 3 IO . I (, ,l (6 ( C· '{ fJ, ( u,, i,J-;)10 i;c)'Z. 6 I \\ 9 G r '., I,:· ./ Tl il~b ~)e; i T \l'<Y1 \\ z t,1-b ~) 1 19 1\C~\hr \0 i1 .n .., D C'~ \ Z.i C, YC~ no ~er~@ 1'Zzo J . ./ \tltt ~ \ 2. \(.9 h 11 \ 1 S 12 :i? \J z 11,t r ~s \rS . . Note: Temp, pH, EC must 3t3b1hze ± :> il/u, ror 3UCCSSSiva measurements tslten in Intervals~ 5 minutes ):\La o\Forms\F1 eld Shee1s\Monitor Well Fl1_15hin9 _Recor j _j :x; :iroup 5 ~uu IM I Anuc r'UCLI\., U I ILi I I LJh;J I n.1\J I L.IULV . >urpose : )ite \.CMW-15 \CMW-16 ~CMW-17 t\CMW-18 ~CMW-19 Trip Blank Temperature of Control when samples received at L ab ID# t ii l • lj/ I ~ . ', --Jl . --J .. J/ Depth toGW Time ft j(/'"l 1:".~0 \ ( )4 }3:31 \1-D1. !l v,.., ,. ) i2~d , ./ I q ! r: 1D I I 'l Ai . ,J f. <ii( Groundwate r samp les shall be collected only after;;: 1 well volumes have been flus hed and Temperature, pH, and EC measurements have stabilized to approximate ly± 5% for each successive measurement taken in intervals;;: 5 minutes. ACMW FIELD MONITORING RECORD Samplers: Jj(.,,f ,1,I t If - Preservative Std Check Depth to Well Water Cale Actual Well Casing Column Water to Water OJ Bottom Diameter Height Purge Purged ~ H2SO, <_;j <{ Temp EC I;) !;2 oH EC COMMENTS 'C pH µSiem ft Inch ft Gallons Gallons ... u5 oH = I 11.q 6\\ ~s // f' . .,.., i5 I. (i -r t,) J.L 29.5 2 ,IV \ 0.1 ~.~L I iY I \<;Jft, 11 C i \.l 29.0 2 l · 6 q,-'.) 6.4 () \03 30.0 2 '"I /)s \1.... I 2.,2 q I.{ \0 ~ ~j'1 io j ~ ., { 3. ~ IC) u I )> 28.0 2 '' . /. b 10 .~ /7 , l ]*( It ( '?:} pq b, ) 20.0 2 u . .. ' . t; '- Minimum gallons to flush = 1 x 7.48 x 3. 14 x 0.0832 x water co lumn height pH Std Check uses a 7 .00 buffer. pH meter must be re- Gallons to flush= 0 .17 x water column height (ft) standa rdized if re sult exceeds 7 .00 ± 0 .05 . EC Std Ch e ck Water column height= depth of well -water level uses a 200 µSiem s tandard for 50' well whose water level is 35 feet from ground level: Water column height = 50' -35' = 15' Flushint Record Temp Minutes Gallons oc pH Well Time Flushed Flushed ±5% ±5% .~cmv-6 110-:} ,,~ ·2 12 v C, 0\ II 17 1i D lo l 1.9 l 11 Al1tt1rl b 1/ l i 3 ). c--t ~ 10, 1. ~ ... '? • L, t., II 3~ <6 ~ IO, ( 0 1-/ 11c v\ lAJ · l 1-ii 'SJ, L 2 1.U, ~-)j i1.0t .~~ 1' ,s ir') ~.LIO \foe vn vi · I <t i221 l ·2 -~ 10 .s (~A 11)~ t s \ 0 t (,J1 J ?),' /J,C/)f W · I 11.5 'I! L "1.. /0. 2 6i+b I )u~ 1 s i O 4 {,.W \;6? 't1 I~ 10.~ (ij Note: Temp, pH, EC must $l!lbrllze ± 5 % far success ive measurements la1cen In intervals:: 5 minutes J:\Lab\Forms\Field Sheets\Monitor_Well_Flushing_Record doc .. , /) Date: o<2 ~'./ 1--" EC 1,1S ±5% Sampler Comments bS '9u ·t_:__ II O lf ~c: "..) ,~, / !1..-(.7 I ~I i no //s-s- i Q ~ io / 7-Z, 1- try 11-~ / 7 S'' rrb n9