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June 14, 2023 <br /> Lab No. : STK2336961 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> MMCM <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 06/06/2023:206153AMM ND mg/L 0.6% 10 406 <br /> Bicarbonate 2320B (STK2336919-003) Dup mg/L 0.4% 10 <br /> Carbonate 2320B (STK2336919-003) Dup mg/L 10.5% 10 440 <br /> E.C. 2320B (STK2336919-003) Dup umhos/cm 0.7% 5 <br /> Hydroxide 2320B (STK2336919-003) Dup mg/L 10.5% 10 440 <br /> Solids,Total Dissolved 2540CE 06/02/2023:206023CTL Blank mg/L ND <20 <br /> LCS mg/L 993.7 96.9% 90-110 <br /> (CH 2373492-009) Dup mg/L 2.30% 5 <br /> (CH 2373492-009) Dup mg/L 1.14% 5 <br /> Chloride 300.0 05/31/2023:206447LDM Blank mg/L 1 <1 <br /> LCS mg/L 25.00 105% 90-110 <br /> MS mg/L 50.00 104% 85-121 <br /> (STK2336623-003) MSD mg/L 50.00 103% 85-121 <br /> MSRPD mg/L 10.00 1.6% :519 <br /> MS mg/L 50.00 102% 85-121 <br /> (STK2336837-001) MSD mg/L 50.00 99.9% 85-121 <br /> MSRPD mg/L 10.00 2.1% :519 <br /> Fluoride 300.0 05/31/2023:206447LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 105% 90-110 <br /> MS mg/L 5.000 106% 87-120 <br /> (STK2336623-003) MSD mg/L 5.000 104% 87-120 <br /> MSRPD mg/L 10.00 1.7% :516 <br /> MS mg/L 5.000 105% 87-120 <br /> (STK2336837-001) MSD mg/L 5.000 103% 87-120 <br /> MSRPD mg/L 10.00 2.3% :516 <br /> Nitrate 300.0 05/31/2023:206447LDM Blank mg/L 1 <0.4 <br /> LCS mg/L 20.00 106% 90-110 <br /> MS mg/L 40.00 106% 85-119 <br /> (STK2336623-003) MSD mg/L 40.00 104% 85-119 <br /> MSRPD mg/L 10.00 1.6% :519 <br /> MS mg/L 40.00 105% 85-119 <br /> (STK2336837-001) MSD mg/L 40.00 103% 85-119 <br /> MSRPD mg/L 10.00 2.2% :519 <br /> Nitrate+Nitrite as N 300.0 05/31/2023:206447LDM Blank mg/L 1 <0.4 <br /> LCS mg/L 20.00 106% 90-110 <br /> MS mg/L 40.00 106% 85-119 <br /> (STK2336623-003) MSD mg/L 40.00 104% 85-119 <br /> MSRPD mg/L 10.00 1.6% 1519 <br /> MS mg/L 40.00 105% 85-119 <br /> (STK2336837-001) MSD mg/L 40.00 103% 85-119 <br /> MSRPD mg/L 10.00 2.2% :519 <br /> Nitrate Nitrogen 300.0 05/31/2023:206447LDM Blank mg/L 1 <0.4 <br /> LCS mg/L 20.00 106% 90-110 <br /> MS mg/L 40.00 106% 85-119 <br /> (STK2336623-003) MSD mg/L 40.00 104% 85-119 <br /> MSRPD mg/L 10.00 1.6% :519 <br /> MS mg/L 40.00 105% 85-119 <br /> (STK2336837-001) MSD mg/L 40.00 103% 85-119 <br /> MSRPD mg/L 10.00 2.2% :519 <br /> Nitrite as Nitrogen 300.0 05/31/2023:206447LDM Blank mg/L 1 <0.4 <br /> Page 6 of 7 Page 6 of 7 <br />