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June 5, 2023 <br /> Lab No. : STK2335650 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 05/08/2023:204946AMM ND mg/L 146% 10 435 <br /> Bicarbonate 2320B (VI 2342767-001) Dup mg/L 146% 10 440 <br /> E.C. 2320B (VI 2342767-001) Dup umhos/cm 0.8% 5 <br /> Solids,Total Dissolved 2540CE 05/08/2023:204937CTL Blank mg/L ND <20 <br /> LCS mg/L 993.7 97.4% 90-110 <br /> (SP 2307092-001) Dup mg/L 0.4% 5 <br /> (SP 2307092-001) Dup mg/L 0.4% 5 <br /> Chloride 300.0 05/05/2023:204935LDM Blank mg/L 1 <1 <br /> LCS mg/L 25.00 103% 90-110 <br /> MS mg/L 50.00 95.3% 85-121 <br /> (STK2335650-001) MSD mg/L 50.00 97.4% 85-121 <br /> MSRPD mg/L 10.00 1.5% 5519 <br /> MS mg/L 50.00 99.6% 85-121 <br /> (STK2335638-001) MSD mg/L 50.00 103% 85-121 <br /> MSRPD mg/L 10.00 3.0% 5519 <br /> Fluoride 300.0 05/05/2023:204935LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 103% 90-110 <br /> MS mg/L 5.000 103% 87-120 <br /> (STK2335650-001) MSD mg/L 5.000 105% 87-120 <br /> MSRPD mg/L 10.00 2.0% 5_16 <br /> MS mg/L 5.000 102% 87-120 <br /> (STK2335638-001) MSD mg/L 5.000 106% 87-120 <br /> MSRPD mg/L 10.00 3.6% .516 <br /> Nitrate 300.0 05/05/2023:204935LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 104% 90-110 <br /> MS mg/L 40.00 78.1 % 85-119 435 <br /> (STK2335650-001) MSD mg/L 40.00 79.8% 85-119 435 <br /> MSRPD mg/L 10.00 0.7% :519 <br /> MS mg/L 40.00 101 % 85-119 <br /> (STK2335638-001) MSD mg/L 40.00 104% 85-119 <br /> MSRPD mg/L 10.00 2.8% 5519 <br /> Nitrate+Nitrite as N 300.0 05/05/2023:204935LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 104% 90-110 <br /> MS mg/L 40.00 78.1 % 85-119 435 <br /> (STK2335650-001) MSD mg/L 40.00 79.8% 85-119 435 <br /> MSRPD mg/L 10.00 0.7% :519 <br /> MS mg/L 40.00 101 % 85-119 <br /> (STK2335638-001) MSD mg/L 40.00 104% 85-119 <br /> MSRPD mg/L 10.00 2.8% :519 <br /> Nitrate Nitrogen 300.0 05/05/2023:204935LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 104% 90-110 <br /> MS mg/L 40.00 78.1 % 85-119 435 <br /> (STK2335650-001) MSD mg/L 40.00 79.8% 85-119 435 <br /> MSRPD mg/L 10.00 0.7% :519 <br /> MS mg/L 40.00 101 % 85-119 <br /> (STK2335638-001) MSD mg/L 40.00 104% 85-119 <br /> MSRPD mg/L 10.00 2.8% :519 <br /> Nitrite as Nitrogen 300.0 05/05/2023:204935LDM Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 104% 90-110 <br /> MS mg/L 30.00 102% 74-126 <br /> Page 8 of 9 Page 8 of 9 <br />