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August 19, 2022 <br /> Lab No. : STK2250946 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 08/08/2022:208926AMM ND mg/L 0.7% 10 435 <br /> Bicarbonate 2320B (SP 2212680-001) Dup mg/L 0.7% 10 <br /> E.C. 2510B O8/08/2022:208898STA Blank umhos/cm ND <1 <br /> (SP 2212506-001) Dup umhos/cm 0.5% 5 <br /> Solids,Total Dissolved 2540CE 08/05/2022:208837CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 101 % 90-110 <br /> (CC 2282957-001) Dup mg/L 2.1% 5 <br /> (CC 2282957-001) Dup mg/L 0.8% 5 <br /> Chloride 300.0 08/04/2022:208811LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 99.3% 90-110 <br /> MS mg/L 50.00 85.9% 85-121 <br /> (CH 2276416-001) MSD mg/L 50.00 88.7% 85-121 <br /> MSRPD mg/L 100.0 1.7% :519 <br /> MS mg/L 50.00 88.8% 85-121 <br /> (CH 2276415-001) MSD mg/L 50.00 88.1 % 85-121 <br /> MSRPD mg/L 100.0 0.5% 5519 <br /> Fluoride 300.0 08/04/2022:208811LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 99.8% 90-110 <br /> MS mg/L 5.000 96.6% 87-120 <br /> (CH 2276416-001) MSD mg/L 5.000 99.5% 87-120 <br /> MSRPD mg/L 100.0 2.5% :516 <br /> MS mg/L 5.000 97.3% 87-120 <br /> (CH 2276415-001) MSD mg/L 5.000 96.9% 87-120 <br /> MSRPD mg/L 100.0 0.3% 5_16 <br /> Nitrate 300.0 08/04/2022:208811LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.8% 90-110 <br /> MS mg/L 40.00 96.9% 85-119 <br /> (CH 2276416-001) MSD mg/L 40.00 100% 85-119 <br /> MSRPD mg/L 100.0 3.1% :519 <br /> MS mg/L 40.00 98.3% 85-119 <br /> (CH 2276415-001) MSD mg/L 40.00 97.4% 85-119 <br /> MSRPD mg/L 100.0 0.8% :519 <br /> Nitrate+Nitrite as N 300.0 08/04/2022:208811LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.8% 90-110 <br /> MS mg/L 40.00 96.9% 85-119 <br /> (CH 2276416-001) MSD mg/L 40.00 100% 85-119 <br /> MSRPD mg/L 100.0 3.1% :519 <br /> MS mg/L 40.00 98.3% 85-119 <br /> (CH 2276415-001) MSD mg/L 40.00 97.4% 85-119 <br /> MSRPD mg/L 100.0 0.8% :519 <br /> Nitrate Nitrogen 300.0 08/04/2022:208811LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.8% 90-110 <br /> MS mg/L 40.00 96.9% 85-119 <br /> (CH 2276416-001) MSD mg/L 40.00 100% 85-119 <br /> MSRPD mg/L 100.0 3.1% 5519 <br /> MS mg/L 40.00 98.3% 85-119 <br /> (CH 2276415-001) MSD mg/L 40.00 97.4% 85-119 <br /> MSRPD mg/L 100.0 0.8% :519 <br /> Nitrite as Nitrogen 300.0 08/04/2022:208811LDM Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 101 % 90-110 <br /> Page 6 of 7 Page 6 of 7 <br />