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July 14, 2021 Lab ID : STK2138920 <br />San Joaquin Co. Environmental Health Dep Customer : 3-17919 <br />Quality Control - Inorganic <br />Constituent Method Date/ID Type Units Conc. QC Data DQO Note <br />Metals <br />Sodium 200.7 06/28/21:209813AC CCB ppm -0.002 1 <br />Zinc 200.7 MS ug/L 800.0 98.6% 75-125 <br />(STK2138920-001) MSD ug/L 800.0 109% 75-125 <br />MSRPD ug/L 4000 10.0% 520.0 <br />200.7 06/28/21:209813AC CCV PPm 1.000 104% 90-110 <br />CCB PPm -0.0038 0.02 <br />CCV PPm 1.000 108% 90-110 <br />CCB PPm -0.0065 0.02 <br />Wet Chem <br />Alkalinity (as CaCO3) 2320B (CH 2174659-003) Dup mg/L 0.2% 10 <br />2320B 07/06/21:210188AMM CCV mg/L 235.8 92.8% 90-110 <br />CCV mg/L 235.8 92.4% 90-110 <br />Bicarbonate 2320B (CH 2174659-003) Dup mg/L 0.2% 10 <br />Carbonate 2320B (CH 2174659-003) Dup mg/L 0.0 10 <br />Hydroxide 2320B (CH 2174659-003) Dup mg/L 0.0 10 <br />Conductivity 2510B 07/12/21:210504sta ICB umhos/cm 0.100 1 <br />CCV umhos/cm 1000 101% 95-105 <br />CCV umhos/cm 1010 95-105 <br />E. C. 2510B 07/12/21:207787sta Blank umhos/cm ND <I <br />(CH 2174531-002) Dup umhos/cm 0.3% 5 <br />Total Dissolved Solids (TFR) 2540CE 06/29/21:207275CTL Blank mg/L 4.3 20 <br />LCS mg/L 995.0 97.0% 90-110 <br />(V12144789-001) Dup mg/L 3.6% 5 <br />(V12144789-001) Dup mg/L 7.2% 5 440 <br />Chloride 300.0 06/25/21:20715 I MCA Blank mg/L ND <1 <br />LCS mg/L 25.00 102% 90-110 <br />MS mg/L 50.00 98.6% 85-121 <br />(VI 2144773-001) MSD mg/L 50.00 99.5 % 85-121 <br />MSRPD mg/L 10.00 0.6% 529 <br />MS mg/L 50.00 99.3 % 85-121 <br />(VI 2144773-002) MSD mg/L 50.00 100% 85-121 <br />MSRPD mg/L 10.00 0.7% 529 <br />300.0 06/25/21:209708MCA ICB mg/L 0.00 1 <br />ICV mg/L 25.00 99.0% 90-110 <br />CCB mg L 0.09 1 <br />CCV mg/L 25.00 99.0% 90-110 <br />Fluoride 300.0 06/25/21:207151MCA Blank mg/L ND <0.1 <br />LCS mg/L 2.500 103% 90-110 <br />MS mg/L 5.000 104% 87-120 <br />(VI 2144773-001) MSD mg/L 5.000 105% 87-120 <br />MSRPD mg/L 10.00 1.0% 526 <br />MS mg/L 5.000 103 % 87-120 <br />(V12144773-002) MSD mg/L 5.000 104% 87-120 <br />MSRPD mg/L 10.00 1.4% 526 <br />300.0 06/25/21:209708MCA ICB mg/L 0.000 0.1 <br />ICV mg/L 2.500 99.6% 90-110 <br />CCB ing/L 0.000 0.1 <br />CCV mg/L 2.500 99.1% 90-110 <br />Narme 300.0 06/25/21:207151MCA Blank mg/L ND <0.4 <br />LCS mg/L 20.00 102% 90-110 <br />MS mg/L 40.00 102% 85-119 <br />(VI 2144773-001) MSD mg/L 40.00 103% 85-119 <br />MSRPD mg/L 10.00 0.7% 529 <br />MS mg/L 40.00 102% 85-119 <br />Page 7 of 9