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October 28, 2022 <br /> Lab No. : STK2254807 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 10/22/2022:212053AMM ND mg/L 2.94% 10 <br /> Bicarbonate 2320B (VI 2247971-007) Dup mg/L 2.99% 10 <br /> E.C. 2320B (VI 2247971-007) Dup umhos/cm 0.3% 5 <br /> Solids,Total Dissolved 2540CE 10/17/2022:211815CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 101 % 90-110 <br /> (SP 2216465-001) Dup mg/L 1.2% 5 <br /> (SP 2216465-001) Dup mg/L 0.9% 5 <br /> Chloride 300.0 10/27/2022:212328LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 99.6% 90-110 <br /> MS mg/L 50.00 89.9% 85-121 <br /> (CC 2283975-001) MSD mg/L 50.00 99.5% 85-121 <br /> MSRPD mg/L 10.00 7.7% 5519 <br /> MS mg/L 50.00 101 % 85-121 <br /> (STK2254807-001) MSD mg/L 50.00 90.3% 85-121 <br /> MSRPD mg/L 10.00 8.8% 5519 <br /> Fluoride 300.0 10/27/2022:212328LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 101 % 90-110 <br /> MS mg/L 5.000 93.6% 87-120 <br /> (CC 2283975-001) MSD mg/L 5.000 104% 87-120 <br /> MSRPD mg/L 10.00 9.1% 5_16 <br /> MS mg/L 5.000 107% 87-120 <br /> (STK2254807-001) MSD mg/L 5.000 95.4% 87-120 <br /> MSRPD mg/L 10.00 10.9% 5516 <br /> Sulfate 300.0 10/27/2022:212328LDM Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 98.8% 90-110 <br /> MS mg/L 100.0 83.0% 82-124 <br /> (CC 2283975-001) MSD mg/L 100.0 92.4% 82-124 <br /> MSRPD mg/L 10.00 6.2% :523 <br /> MS mg/L 100.0 104% 82-124 <br /> (STK2254807-001) MSD mg/L 100.0 92.9% 82-124 <br /> MSRPD mg/L 10.00 10.7% 5_23 <br /> Nitrate 4500NO3F 10/14/2022:211752LFS Blank mg/L ND <0.2 <br /> LCS mg/L 11.22 94.6% 80-120 <br /> MS mg/L 5.609 94.4% 66-125 <br /> (STK2254803-001) MSD mg/L 5.609 94.8% 66-125 <br /> MSRPD mg/L 5.609 0.5% :530.4 <br /> Nitrate+Nitrite as N 4500NO3F 10/14/2022:211752LFS Blank mg/L ND <0.2 <br /> LCS mg/L 11.22 94.6% 80-120 <br /> MS mg/L 5.609 94.4% 66-125 <br /> (STK2254803-001) MSD mg/L 5.609 94.8% 66-125 <br /> MSRPD mg/L 5.609 0.5% :530.4 <br /> Nitrate Nitrogen 4500NO3F 10/14/2022:211752LFS Blank mg/L ND <0.2 <br /> LCS mg/L 11.22 94.6% 80-120 <br /> MS mg/L 5.609 94.4% 66-125 <br /> (STK2254803-001) MSD mg/L 5.609 94.8% 66-125 <br /> MSRPD mg/L 5.609 0.5% :530.4 <br /> Nitrite as Nitrogen 4500NO3F 10/14/2022:211753LFS Blank mg/L ND <0.2 <br /> LCS mg/L 1.218 93.8% 80-120 <br /> MS mg/L 0.6090 96.1% 50-150 <br /> (STK2254803-001) MSD mg/L 0.6090 96.1% 50-150 <br /> Page 6 of 7 Page 6 of 7 <br />