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February 23, 2023 <br /> San Joaquin County EHD Lab No. STK2331696 <br /> : <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 02/12/2023:201378AMM ND mg/L 0.02% 10 <br /> Bicarbonate 2320B (STK2331613-001) Dup mg/L 0% 10 <br /> E.C. 2320B (STK2331613-001) Dup umhos/cm 0% 5 <br /> Solids,Total Dissolved 2540CE 02/09/2023:201432CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 99.8% 90-110 <br /> (CC 2380020-001) Dup mg/L 0.4% 5 <br /> (CC 2380020-001) Dup mg/L 0.3% 5 <br /> Chloride 300.0 02/08/2023:201405LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 99.8% 90-110 <br /> MS mg/L 50.00 91.9% 85-121 <br /> (SP 2301432-001) MSD mg/L 50.00 97.1 % 85-121 <br /> MSRPD mg/L 10.00 4.1% 5519 <br /> MS mg/L 50.00 96.0% 85-121 <br /> (STK2331548-002) MSD mg/L 50.00 99.4% 85-121 <br /> MSRPD mg/L 10.00 3.5% 5519 <br /> Fluoride 300.0 02/08/2023:201405LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 99.2% 90-110 <br /> MS mg/L 5.000 95.4% 87-120 <br /> (SP 2301432-001) MSD mg/L 5.000 101 % 87-120 <br /> MSRPD mg/L 10.00 5.7% 5_16 <br /> MS mg/L 5.000 97.2% 87-120 <br /> (STK2331548-002) MSD mg/L 5.000 101 % 87-120 <br /> MSRPD mg/L 10.00 3.9% .516 <br /> Nitrate 300.0 02/08/2023:201405LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 97.8% 90-110 <br /> MS mg/L 40.00 94.6% 85-119 <br /> (SP 2301432-001) MSD mg/L 40.00 99.9% 85-119 <br /> MSRPD mg/L 10.00 5.4% :519 <br /> MS mg/L 40.00 95.1 % 85-119 <br /> (STK2331548-002) MSD mg/L 40.00 98.4% 85-119 <br /> MSRPD mg/L 10.00 3.0% 5519 <br /> Nitrate+Nitrite as N 300.0 02/08/2023:201405LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 97.8% 90-110 <br /> MS mg/L 40.00 94.6% 85-119 <br /> (SP 2301432-001) MSD mg/L 40.00 99.9% 85-119 <br /> MSRPD mg/L 10.00 5.4% :519 <br /> MS mg/L 40.00 95.1 % 85-119 <br /> (STK2331548-002) MSD mg/L 40.00 98.4% 85-119 <br /> MSRPD mg/L 10.00 3.0% :519 <br /> Nitrate Nitrogen 300.0 02/08/2023:201405LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 97.8% 90-110 <br /> MS mg/L 40.00 94.6% 85-119 <br /> (SP 2301432-001) MSD mg/L 40.00 99.9% 85-119 <br /> MSRPD mg/L 10.00 5.4% :519 <br /> MS mg/L 40.00 95.1 % 85-119 <br /> (STK2331548-002) MSD mg/L 40.00 98.4% 85-119 <br /> MSRPD mg/L 10.00 3.0% :519 <br /> Nitrite as Nitrogen 300.0 02/08/2023:201405LDM Blank mg/L 1 <0.4 <br /> LCS mg/L 15.00 99.8% 90-110 <br /> MS mg/L 30.00 95.2% 74-126 <br /> Page 6 of 7 Page 6 of 7 <br />