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February 10, 2023 <br /> Lab No. : STK2331199 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 01/30/2023:200861AMM ND mg/L 0.9% 10 <br /> Bicarbonate 2320B (SP 2300905-023) Dup mg/L 1% 10 <br /> E.C. 2320B (SP 2300905-023) Dup umhos/cm 1.12% 5 <br /> Solids,Total Dissolved 2540CE 01/27/2023:200917CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 101 % 90-110 <br /> (SP 2301150-012) Dup mg/L 2.9% 5 <br /> (SP 2301150-012) Dup mg/L 0.6% 5 <br /> Chloride 300.0 01/26/2023:200924LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 97.6% 90-110 <br /> MS mg/L 50.00 83.7% 85-121 435 <br /> (VI 2340468-001) MSD mg/L 50.00 90.8% 85-121 <br /> MSRPD mg/L 10.00 4.4% 5519 <br /> MS mg/L 50.00 79.8% 85-121 435 <br /> (VI 2340471-001) MSD mg/L 50.00 84.5% 85-121 435 <br /> MSRPD mg/L 10.00 2.5% 5519 <br /> Fluoride 300.0 01/26/2023:200924LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 98.6% 90-110 <br /> MS mg/L 5.000 93.1 % 87-120 <br /> (VI 2340468-001) MSD mg/L 5.000 101 % 87-120 <br /> MSRPD mg/L 10.00 6.7% 5_16 <br /> MS mg/L 5.000 93.6% 87-120 <br /> (VI 2340471-001) MSD mg/L 5.000 98.9% 87-120 <br /> MSRPD mg/L 10.00 4.6% .516 <br /> Nitrate 300.0 01/26/2023:200924LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 97.4% 90-110 <br /> MS mg/L 40.00 94.1 % 85-119 <br /> (VI 2340468-001) MSD mg/L 40.00 102% 85-119 <br /> MSRPD mg/L 10.00 8.0% :519 <br /> MS mg/L 40.00 94.7% 85-119 <br /> (VI 2340471-001) MSD mg/L 40.00 100% 85-119 <br /> MSRPD mg/L 10.00 5.5% 5519 <br /> Nitrate+Nitrite as N 300.0 01/26/2023:200924LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 97.4% 90-110 <br /> MS mg/L 40.00 94.1 % 85-119 <br /> (VI 2340468-001) MSD mg/L 40.00 102% 85-119 <br /> MSRPD mg/L 10.00 8.0% :519 <br /> MS mg/L 40.00 94.7% 85-119 <br /> (VI 2340471-001) MSD mg/L 40.00 100% 85-119 <br /> MSRPD mg/L 10.00 5.5% :519 <br /> Nitrate Nitrogen 300.0 01/26/2023:200924LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 97.4% 90-110 <br /> MS mg/L 40.00 94.1 % 85-119 <br /> (VI 2340468-001) MSD mg/L 40.00 102% 85-119 <br /> MSRPD mg/L 10.00 8.0% :519 <br /> MS mg/L 40.00 94.7% 85-119 <br /> (VI 2340471-001) MSD mg/L 40.00 100% 85-119 <br /> MSRPD mg/L 10.00 5.5% :519 <br /> Nitrite as Nitrogen 300.0 01/26/2023:200924LDM Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 97.7% 90-110 <br /> MS mg/L 30.00 93.9% 74-126 <br /> Page 7 of 8 Page 7 of 8 <br />