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June 9, 2021 Lab ID : STK2137320 <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 05/25/21:207847AC CCB PPm -0.14 1 <br />Zinc 200.7 MS ug/L 800.0 98.6 % 75-125 <br />(CH 2173573-001) MSD ug/L 800.0 97.3% 75-125 <br />MSRPD ug/L 4000 1.3% <0.0 <br />200.7 05/25/21:207847AC CCV PPm 1.000 104% 90-110 <br />CCB ppm 0.0004 0.02 <br />CCV PPm 1.000 103% 90-110 <br />CCB PPm 0.0003 0.02 <br />Wet Chem <br />Alkalinity (as CaCO3) 2320B (5TK2137222-012) Dup mg/L 4.2% 10 <br />2320B 06/01/21:208223AMM CCV mg/L 235.8 98.4% 90-110 <br />CCV mg/L 235.8 96.6% 90-110 <br />Bicarbonate 2320B (5TK2137222-012) Dup mg/L 4.3% 10 <br />Carbonate 2320B (STK2137222-012) Dup mg/L 0.0 10 <br />Hydroxide 2320B (STK2137222-012) Dup mg/L 0.0 10 <br />Conductivity 25108 06/02/21:208227sta ICB umhos/cm 0.09 1 <br />CCV umhos/cm 1000 103% 95-105 <br />CCV umhos/cm 1000 102 % 95-105 <br />E. C. 2510B 06/02/21:206079sta Blank umhos/cm ND <1 <br />(SP 2106944-012) Dup umhos/cm 0.1% 5 <br />Total Dissolved Solids (1FR) 2540CE 05/26/21:205860CTL Blank mg/L ND <20 <br />LCS mg/L 995.0 102% 90-110 <br />(SP 2106812-001) Dup mg/L 0.6% 5 <br />(SP 2106812-001) Dup mg/L 0.3% 5 <br />Chloride 300.0 05/25/21:205821MCA Blank mg/L ND <1 <br />LCS mg/L 25.00 99.9 % 90-110 <br />MS mg/L 50.00 99.0% 85-121 <br />(CH 2173257-001) MSD mg/L 50.00 99.2 % 85-121 <br />MSRPD mg/L 10.00 0.1% <19 <br />MS mg/L 50.00 98.7% 85-121 <br />(VI 2143484-002) MSD mg/L 50.00 96.8 % 85-121 <br />MSRPD mg/L 10.00 1.4% <19 <br />300.0 05/25/21:207838MCA ICB mg/L 0.09 1 <br />ICV mg/L 25.00 101% 90-110 <br />CCB mg/L 0.1 1 <br />CCV mg/L 25.00 101% 90-110 <br />Fluoride 300.0 05/25/21:205821MCA Blank mg/L ND <0.1 <br />LCS mg/L 2.500 102 % 90-110 <br />MS mg/L 5.000 116% 87-120 <br />(CH 2173257-001) MSD mg/L 5.000 116% 87-120 <br />MSRPD mg/L 10.00 0.4% <16 <br />MS mg/L 5.000 106 % 87-120 <br />(VI 2143484-002) MSD mg/L 5.000 103 % 87-120 <br />MSRPD mg/L 10.00 2.3% <16 <br />300.0 05/25/21:207838MCA ICB mg/L 0.000 0.1 <br />ICV mg/L 2.500 102% 90-110 <br />CCB mg/L 0.000 0.1 <br />CCV mg/L 2.500 102% 90-110 <br />Nitrate 300.0 05/25/21:205821MCA Blank mg/L ND <0.4 <br />LCS mg/L 20.00 101 % 90-110 <br />MS mg/L 40.00 105% 85-119 <br />(CH 2173257-001) MSD mg/L 40.00 105% 85-119 <br />MSRPD mg/L 10.00 0.2% <19 <br />MS mg/L 40.00 89.8% 85-119 <br />Page 7 of 9