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March 8, 2023 <br /> San Joaquin County EHD Lab No. STK2332214 <br /> : <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> mmcm <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 02/20/2023:201884AMM ND mg/L 0.7% 10 <br /> Bicarbonate 2320B (CH 2371138-006) Dup mg/L 0.7% 10 <br /> E.C. 2320B (CH 2371138-006) Dup umhos/cm 0% 5 <br /> Solids,Total Dissolved 2540CE 02/20/2023:201833CTL Blank mg/L ND <20 <br /> LCS mg/L 991.7 101 % 90-110 <br /> (SP 2302400-001) Dup mg/L 0.1% 5 <br /> (SP 2302400-001) Dup mg/L 1.8% 5 <br /> Chloride 300.0 02/17/2023:201815LDM Blank mg/L 1 <1 <br /> LCS mg/L 25.00 101 % 90-110 <br /> MS mg/L 50.00 93.8% 85-121 <br /> (STK2331811-001) MSD mg/L 50.00 97.3% 85-121 <br /> MSRPD mg/L 10.00 3.1% :519 <br /> MS mg/L 50.00 92.0% 85-121 <br /> (CC 2380486-001) MSD mg/L 50.00 90.5% 85-121 <br /> MSRPD mg/L 10.00 1.1% :519 <br /> Fluoride 300.0 02/17/2023:201815LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 101 % 90-110 <br /> MS mg/L 5.000 97.7% 87-120 <br /> (STK2331811-001) MSD mg/L 5.000 101 % 87-120 <br /> MSRPD mg/L 10.00 3.3% <_16 <br /> MS mg/L 5.000 101 % 87-120 <br /> (CC 2380486-001) MSD mg/L 5.000 99.4% 87-120 <br /> MSRPD mg/L 10.00 1.5% :516 <br /> Nitrate 300.0 02/17/2023:201815LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 101 % 90-110 <br /> MS mg/L 40.00 95.5% 85-119 <br /> (STK2331811-001) MSD mg/L 40.00 99.0% 85-119 <br /> MSRPD mg/L 10.00 3.0% :519 <br /> MS mg/L 40.00 87.9% 85-119 <br /> (CC 2380486-001) MSD mg/L 40.00 86.4% 85-119 <br /> MSRPD mg/L 10.00 0.9% :519 <br /> Nitrate+Nitrite as N 300.0 02/17/2023:201815LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 101 % 90-110 <br /> MS mg/L 40.00 95.5% 85-119 <br /> (STK2331811-001) MSD mg/L 40.00 99.0% 85-119 <br /> MSRPD mg/L 10.00 3.0% :519 <br /> MS mg/L 40.00 87.9% 85-119 <br /> (CC 2380486-001) MSD mg/L 40.00 86.4% 85-119 <br /> MSRPD mg/L 10.00 0.9% 1519 <br /> Nitrate Nitrogen 300.0 02/17/2023:201815LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 101 % 90-110 <br /> MS mg/L 40.00 95.5% 85-119 <br /> (STK2331811-001) MSD mg/L 40.00 99.0% 85-119 <br /> MSRPD mg/L 10.00 3.0% :519 <br /> MS mg/L 40.00 87.9% 85-119 <br /> (CC 2380486-001) MSD mg/L 40.00 86.4% 85-119 <br /> MSRPD mg/L 10.00 0.9% :519 <br /> Nitrite as Nitrogen 300.0 02/17/2023:201815LDM Blank mg/L 1 <0.4 <br /> LCS mg/L 15.00 101 % 90-110 <br /> MS mg/L 30.00 95.5% 74-126 <br /> Page 6 of 7 Page 6 of 7 <br />