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March 30, 2023 <br /> Lab No. : STK2332876 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 03/08/2023:202548AMM ND mg/L 4.55% 10 <br /> Bicarbonate 2320B (STK2332876-001) Dup mg/L 4.58% 10 <br /> E.C. 2320B (STK2332876-001) Dup umhos/cm 0% 5 <br /> Solids,Total Dissolved 2540CE 03/08/2023:202521CTL Blank mg/L ND <20 <br /> LCS mg/L 992.0 101% 90-110 <br /> (SP 2303336-001) Dup mg/L 2.41% 5 <br /> (SP 2303336-001) Dup mg/L 2.88% 5 <br /> Chloride 300.0 03/22/2023:203148LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 102% 90-110 <br /> MS mg/L 50.00 98.5% 85-121 <br /> (STK2332876-001) MSD mg/L 50.00 100% 85-121 <br /> MSRPD mg/L 10.00 1.5% 5519 <br /> MS mg/L 50.00 100% 85-121 <br /> (VI 2341518-001) MSD mg/L 50.00 96.6% 85-121 <br /> MSRPD mg/L 10.00 3.0% 5519 <br /> Fluoride 300.0 03/22/2023:203148LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 101 % 90-110 <br /> MS mg/L 5.000 102% 87-120 <br /> (STK2332876-001) MSD mg/L 5.000 103% 87-120 <br /> MSRPD mg/L 10.00 1.5% 5_16 <br /> MS mg/L 5.000 101 % 87-120 <br /> (VI 2341518-001) MSD mg/L 5.000 98.0% 87-120 <br /> MSRPD mg/L 10.00 3.4% 5516 <br /> Sulfate 300.0 03/22/2023:203148LDM Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 103% 90-110 <br /> MS mg/L 100.0 102% 82-124 <br /> (STK2332876-001) MSD mg/L 100.0 104% 82-124 <br /> MSRPD mg/L 10.00 1.8% :523 <br /> MS mg/L 100.0 102% 82-124 <br /> (VI 2341518-001) MSD mg/L 100.0 98.7% 82-124 <br /> MSRPD mg/L 10.00 3.2% 5_23 <br /> Nitrate 4500NO3F 03/07/2023:202485LFS Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 97.2% 80-120 <br /> MS mg/L 5.609 98.3% 66-125 <br /> (CH 2371491-001) MSD mg/L 5.609 99.3% 66-125 <br /> MSRPD mg/L 5.609 0.7% :530.4 <br /> Nitrate+Nitrite as N 4500NO3F 03/07/2023:202485LFS Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 97.2% 80-120 <br /> MS mg/L 5.609 98.3% 66-125 <br /> (CH 2371491-001) MSD mg/L 5.609 99.3% 66-125 <br /> MSRPD mg/L 5.609 0.7% :530.4 <br /> Nitrate Nitrogen 4500NO3F 03/07/2023:202485LFS Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 97.2% 80-120 <br /> MS mg/L 5.609 98.3% 66-125 <br /> (CH 2371491-001) MSD mg/L 5.609 99.3% 66-125 <br /> MSRPD mg/L 5.609 0.7% :530.4 <br /> Nitrite as Nitrogen 4500NO3F 03/07/2023:202486LFS Blank mg/L ND <0.2 <br /> LCS mg/L 1.218 103% 80-120 <br /> MS mg/L 0.6090 104% 50-150 <br /> (CH 2371491-001) MSD mg/L 0.6090 105% 50-150 <br /> Page 6 of 7 Page 6 of 7 <br />