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March 21, 2023 <br /> Lab No. : STK2332628 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 03/06/2023:202435AMM ND mg/L 1.43% 10 435 <br /> Bicarbonate 2320B (CC 2380676-001) Dup mg/L 1.59% 10 <br /> E.C. 2320B (CC 2380676-001) Dup umhos/cm 0% 5 <br /> Solids,Total Dissolved 2540CE 03/01/2023:202237CTL Blank mg/L ND <20 <br /> LCS mg/L 992.0 99.6% 90-110 <br /> (CH 2371347-001) Dup mg/L 0.2% 5 <br /> (CH 2371347-001) Dup mg/L 0.6% 5 <br /> Chloride 300.0 03/01/2023:202292LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 94.6% 90-110 <br /> MS mg/L 50.00 92.8% 85-121 <br /> (STK2332430-001) MSD mg/L 50.00 94.7% 85-121 <br /> MSRPD mg/L 10.00 1.7% 5519 <br /> MS mg/L 50.00 92.1 % 85-121 <br /> (STK2332435-001) MSD mg/L 50.00 97.9% 85-121 <br /> MSRPD mg/L 10.00 5.6% 5519 <br /> Fluoride 300.0 03/01/2023:202292LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 94.2% 90-110 <br /> MS mg/L 5.000 95.7% 87-120 <br /> (STK2332430-001) MSD mg/L 5.000 97.7% 87-120 <br /> MSRPD mg/L 10.00 2.0% 5_16 <br /> MS mg/L 5.000 93.1 % 87-120 <br /> (STK2332435-001) MSD mg/L 5.000 99.0% 87-120 <br /> MSRPD mg/L 10.00 5.9% .516 <br /> Nitrate 300.0 03/01/2023:202292LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 93.9% 90-110 <br /> MS mg/L 40.00 92.6% 85-119 <br /> (STK2332430-001) MSD mg/L 40.00 94.4% 85-119 <br /> MSRPD mg/L 10.00 1.5% :519 <br /> MS mg/L 40.00 92.5% 85-119 <br /> (STK2332435-001) MSD mg/L 40.00 98.3% 85-119 <br /> MSRPD mg/L 10.00 6.1% 5519 <br /> Nitrate+Nitrite as N 300.0 03/01/2023:202292LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 93.9% 90-110 <br /> MS mg/L 40.00 92.6% 85-119 <br /> (STK2332430-001) MSD mg/L 40.00 94.4% 85-119 <br /> MSRPD mg/L 10.00 1.5% :519 <br /> MS mg/L 40.00 92.5% 85-119 <br /> (STK2332435-001) MSD mg/L 40.00 98.3% 85-119 <br /> MSRPD mg/L 10.00 6.1% :519 <br /> Nitrate Nitrogen 300.0 03/01/2023:202292LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 93.9% 90-110 <br /> MS mg/L 40.00 92.6% 85-119 <br /> (STK2332430-001) MSD mg/L 40.00 94.4% 85-119 <br /> MSRPD mg/L 10.00 1.5% :519 <br /> MS mg/L 40.00 92.5% 85-119 <br /> (STK2332435-001) MSD mg/L 40.00 98.3% 85-119 <br /> MSRPD mg/L 10.00 6.1% :519 <br /> Nitrite as Nitrogen 300.0 03/01/2023:202292LDM Blank mg/L 1 <0.4 <br /> LCS mg/L 15.00 93.1 % 90-110 <br /> MS mg/L 30.00 94.7% 74-126 <br /> Page 6 of 7 Page 6 of 7 <br />