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May 5, 2023 <br /> Lab No. : STK2335136 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 05/02/2023:204734AMM ND mg/L 0.2% 10 435 <br /> Bicarbonate 2320B (VI 2342537-001) Dup mg/L 0.1% 10 <br /> E.C. 2320B (VI 2342537-001) Dup umhos/cm 0% 5 <br /> Solids,Total Dissolved 2540CE 04/27/2023:204553CTL Blank mg/L ND <20 <br /> LCS mg/L 993.7 98.5% 90-110 <br /> (CC 2381242-001) Dup mg/L 1.27% 5 <br /> (CC 2381242-001) Dup mg/L 0.8% 5 <br /> Chloride 300.0 04/26/2023:204584LDM Blank mg/L 1 <1 <br /> LCS mg/L 25.00 101 % 90-110 <br /> MS mg/L 50.00 94.0% 85-121 <br /> (VI 2342426-002) MSD mg/L 50.00 98.1 % 85-121 <br /> MSRPD mg/L 100.0 3.0% 5519 <br /> MS mg/L 50.00 103% 85-121 <br /> (VI 2342426-003) MSD mg/L 50.00 98.5% 85-121 <br /> MSRPD mg/L 100.0 4.0% 5519 <br /> Fluoride 300.0 04/26/2023:204584LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 101 % 90-110 <br /> MS mg/L 5.000 100% 87-120 <br /> (VI 2342426-002) MSD mg/L 5.000 104% 87-120 <br /> MSRPD mg/L 100.0 3.9% 5_16 <br /> MS mg/L 5.000 104% 87-120 <br /> (VI 2342426-003) MSD mg/L 5.000 99.6% 87-120 <br /> MSRPD mg/L 100.0 4.4% .516 <br /> Nitrate 300.0 04/26/2023:204584LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 101 % 90-110 <br /> MS mg/L 40.00 99.6% 85-119 <br /> (VI 2342426-002) MSD mg/L 40.00 104% 85-119 <br /> MSRPD mg/L 100.0 4.1% :519 <br /> MS mg/L 40.00 103% 85-119 <br /> (VI 2342426-003) MSD mg/L 40.00 98.9% 85-119 <br /> MSRPD mg/L 100.0 4.2% 5519 <br /> Nitrate+Nitrite as N 300.0 04/26/2023:204584LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 101 % 90-110 <br /> MS mg/L 40.00 99.6% 85-119 <br /> (VI 2342426-002) MSD mg/L 40.00 104% 85-119 <br /> MSRPD mg/L 100.0 4.1% :519 <br /> MS mg/L 40.00 103% 85-119 <br /> (VI 2342426-003) MSD mg/L 40.00 98.9% 85-119 <br /> MSRPD mg/L 100.0 4.2% :519 <br /> Nitrate Nitrogen 300.0 04/26/2023:204584LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 101 % 90-110 <br /> MS mg/L 40.00 99.6% 85-119 <br /> (VI 2342426-002) MSD mg/L 40.00 104% 85-119 <br /> MSRPD mg/L 100.0 4.1% :519 <br /> MS mg/L 40.00 103% 85-119 <br /> (VI 2342426-003) MSD mg/L 40.00 98.9% 85-119 <br /> MSRPD mg/L 100.0 4.2% :519 <br /> Nitrite as Nitrogen 300.0 04/26/2023:204584LDM Blank mg/L 1 <0.4 <br /> LCS mg/L 15.00 101 % 90-110 <br /> MS mg/L 30.00 99.7% 74-126 <br /> Page 6 of 7 Page 6 of 7 <br />