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<br />July 1, 2022 <br />San Joaquin County EHD Lab No.: STK2237542 <br />Customer No.: 3017919 <br /> <br />Quality Control - Wet Chem <br />Constituent Method Date/ID Type Units Conc.QC Data DQO Note <br />Wet Chem <br />Alkalinity (as CaCO3)2320B 06/12/2022:206531AMM ND mg/L 1.24%10 <br />Bicarbonate 2320B (VI 2243856-001)Dup mg/L 1.25%10 <br />E. C.2510B 06/03/2022:206163STA Blank umhos/cm ND <1 <br />(SP 2209153-001)Dup umhos/cm 0.2%5 <br />Solids, Total Dissolved 2540CE 06/02/2022:206137CTL Blank mg/L ND <20 <br />LCS mg/L 990.8 96.6 %90-110 <br />(SP 2209191-003)Dup mg/L 0.2%5 <br />(SP 2209191-003)Dup mg/L 0.1%5 <br />Chloride 300.0 06/01/2022:206081NJB Blank mg/L ND <1 <br />LCS mg/L 25.00 100 %90-110 <br />MS mg/L 50.00 99.4 %85-121 <br />(STK2237048-001)MSD mg/L 50.00 91.6 %85-121 <br />MSRPD mg/L 10.00 7.6%≤19 <br />MS mg/L 50.00 91.1 %85-121 <br />(CC 2281779-001)MSD mg/L 50.00 90.3 %85-121 <br />MSRPD mg/L 10.00 0.6%≤19 <br />Fluoride 300.0 06/01/2022:206081NJB Blank mg/L ND <0.1 <br />LCS mg/L 2.500 101 %90-110 <br />MS mg/L 5.000 101 %87-120 <br />(STK2237048-001)MSD mg/L 5.000 93.0 %87-120 <br />MSRPD mg/L 10.00 8.6%≤16 <br />MS mg/L 5.000 98.0 %87-120 <br />(CC 2281779-001)MSD mg/L 5.000 97.7 %87-120 <br />MSRPD mg/L 10.00 0.2%≤16 <br />Nitrate 300.0 06/01/2022:206081NJB Blank mg/L ND <0.4 <br />LCS mg/L 20.00 99.3 %90-110 <br />MS mg/L 40.00 99.9 %85-119 <br />(STK2237048-001)MSD mg/L 40.00 92.0 %85-119 <br />MSRPD mg/L 10.00 8.3%≤19 <br />MS mg/L 40.00 96.2 %85-119 <br />(CC 2281779-001)MSD mg/L 40.00 95.2 %85-119 <br />MSRPD mg/L 10.00 0.9%≤19 <br />Nitrate + Nitrite as N 300.0 06/01/2022:206081NJB Blank mg/L ND <0.4 <br />LCS mg/L 20.00 99.3 %90-110 <br />MS mg/L 40.00 99.9 %85-119 <br />(STK2237048-001)MSD mg/L 40.00 92.0 %85-119 <br />MSRPD mg/L 10.00 8.3%≤19 <br />MS mg/L 40.00 96.2 %85-119 <br />(CC 2281779-001)MSD mg/L 40.00 95.2 %85-119 <br />MSRPD mg/L 10.00 0.9%≤19 <br />Nitrate Nitrogen 300.0 06/01/2022:206081NJB Blank mg/L ND <0.4 <br />LCS mg/L 20.00 99.3 %90-110 <br />MS mg/L 40.00 99.9 %85-119 <br />(STK2237048-001)MSD mg/L 40.00 92.0 %85-119 <br />MSRPD mg/L 10.00 8.3%≤19 <br />MS mg/L 40.00 96.2 %85-119 <br />(CC 2281779-001)MSD mg/L 40.00 95.2 %85-119 <br />MSRPD mg/L 10.00 0.9%≤19 <br />Nitrite as Nitrogen 300.0 06/01/2022:206081NJB Blank mg/L ND <0.4 <br />LCS mg/L 15.00 100 %90-110