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February 10, 2023 <br /> Lab No. : STK2330636 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> MMCM <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 01/18/2023:200574AMM ND mg/L 0.07% 10 <br /> Bicarbonate 2320B (VI 2340210-001) Dup mg/L 0% 10 <br /> E.C. 2320B (VI 2340210-001) Dup umhos/cm 0.08% 5 <br /> Solids,Total Dissolved 2540CE 01/18/2023:200562CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 99.2% 90-110 <br /> (SP 2300719-001) Dup mg/L 0.4% 5 <br /> (SP 2300719-001) Dup mg/L 0.1% 5 <br /> Chloride 300.0 01/17/2023:200554LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 95.1 % 90-110 <br /> MS mg/L 50.00 95.8% 85-121 <br /> (STK2330624-001) MSD mg/L 50.00 103% 85-121 <br /> MSRPD mg/L 50.00 6.6% :519 <br /> MS mg/L 50.00 97.0% 85-121 <br /> (STK2330636-001) MSD mg/L 50.00 102% 85-121 <br /> MSRPD mg/L 50.00 4.5% :519 <br /> Fluoride 300.0 01/17/2023:200554LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 95.6% 90-110 <br /> MS mg/L 5.000 96.9% 87-120 <br /> (STK2330624-001) MSD mg/L 5.000 104% 87-120 <br /> MSRPD mg/L 50.00 7.1% :_16 <br /> MS mg/L 5.000 98.8% 87-120 <br /> (STK2330636-001) MSD mg/L 5.000 103% 87-120 <br /> MSRPD mg/L 50.00 4.4% :516 <br /> Sulfate 300.0 01/17/2023:200554LDM Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 96.3% 90-110 <br /> MS mg/L 100.0 96.9% 82-124 <br /> (STK2330624-001) MSD mg/L 100.0 104% 82-124 <br /> MSRPD mg/L 50.00 7.1% :523 <br /> MS mg/L 100.0 98.1 % 82-124 <br /> (STK2330636-001) MSD mg/L 100.0 103% 82-124 <br /> MSRPD mg/L 50.00 4.5% :523 <br /> Nitrite as Nitrogen 4500NO2B 01/14/2023:200461AMM MS mg/L 0.2284 94.7% 1-173 <br /> (STK2330591-001) MSD mg/L 0.2284 99.4% 1-173 <br /> MSRPD mg/L 0.2284 4.8% :520 <br /> Nitrate 4500NO3F 01/19/2023:200626LFS Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 93.5% 80-120 <br /> MS mg/L 5.609 93.2% 66-125 <br /> (SP 2300775-001) MSD mg/L 5.609 93.2% 66-125 <br /> MSRPD mg/L 5.609 0.1% :530.4 <br /> Nitrate+Nitrite as N 4500NO3F 01/19/2023:200626LFS Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 93.5% 80-120 <br /> MS mg/L 5.609 93.2% 66-125 <br /> (SP 2300775-001) MSD mg/L 5.609 93.2% 66-125 <br /> MSRPD mg/L 5.609 0.1% :00.4 <br /> Nitrate Nitrogen 4500NO3F 01/19/2023:200626LFS Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 93.5% 80-120 <br /> MS mg/L 5.609 93.2% 66-125 <br /> (SP 2300775-001) MSD mg/L 5.609 93.2% 66-125 <br /> MSRPD mg/L 5.609 0.1% :_30.4 <br /> MBAS 5540C 01/14/2023:200514AMM Blank mg/L ND <0.1 <br /> Page 6 of 7 Page 6 of 7 <br />