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June 13, 2023 <br /> Lab No. : STK2336735 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 05/31/2023:205944AMM ND mg/L 0.3% 10 <br /> Bicarbonate 2320B (SP 2308647-004) Dup mg/L 0.3% 10 <br /> E.C. 2320B (SP 2308647-004) Dup umhos/cm 0.1% 5 <br /> Solids,Total Dissolved 2540CE 05/26/2023:205799CTL Blank mg/L ND <20 <br /> LCS mg/L 993.7 99.6% 90-110 <br /> (SP 2308656-001) Dup mg/L 2.13% 5 <br /> (SP 2308656-001) Dup mg/L 1.18% 5 <br /> Chloride 300.0 05/25/2023:205856LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 103% 90-110 <br /> MS mg/L 50.00 103% 85-121 <br /> (SP 2308633-001) MSD mg/L 50.00 102% 85-121 <br /> MSRPD mg/L 10.00 0.5% 5519 <br /> MS mg/L 50.00 63.3% 85-121 435 <br /> (SP 2308533-002) MSD mg/L 50.00 73.7% 85-121 435 <br /> MSRPD mg/L 10.00 3.3% 5519 <br /> Fluoride 300.0 05/25/2023:205856LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 104% 90-110 <br /> MS mg/L 5.000 108% 87-120 <br /> (SP 2308633-001) MSD mg/L 5.000 107% 87-120 <br /> MSRPD mg/L 10.00 1.1% 5_16 <br /> MS mg/L 5.000 107% 87-120 <br /> (SP 2308533-002) MSD mg/L 5.000 105% 87-120 <br /> MSRPD mg/L 10.00 1.2% .516 <br /> Nitrate 300.0 05/25/2023:205856LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 104% 90-110 <br /> MS mg/L 40.00 106% 85-119 <br /> (SP 2308633-001) MSD mg/L 40.00 105% 85-119 <br /> MSRPD mg/L 10.00 0.5% :519 <br /> MS mg/L 40.00 107% 85-119 <br /> (SP 2308533-002) MSD mg/L 40.00 105% 85-119 <br /> MSRPD mg/L 10.00 1.9% 5519 <br /> Nitrate+Nitrite as N 300.0 05/25/2023:205856LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 104% 90-110 <br /> MS mg/L 40.00 106% 85-119 <br /> (SP 2308633-001) MSD mg/L 40.00 105% 85-119 <br /> MSRPD mg/L 10.00 0.5% :519 <br /> MS mg/L 40.00 107% 85-119 <br /> (SP 2308533-002) MSD mg/L 40.00 105% 85-119 <br /> MSRPD mg/L 10.00 1.9% :519 <br /> Nitrate Nitrogen 300.0 05/25/2023:205856LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 104% 90-110 <br /> MS mg/L 40.00 106% 85-119 <br /> (SP 2308633-001) MSD mg/L 40.00 105% 85-119 <br /> MSRPD mg/L 10.00 0.5% :519 <br /> MS mg/L 40.00 107% 85-119 <br /> (SP 2308533-002) MSD mg/L 40.00 105% 85-119 <br /> MSRPD mg/L 10.00 1.9% :519 <br /> Nitrite as Nitrogen 300.0 05/25/2023:205856LDM Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 104% 90-110 <br /> MS mg/L 30.00 108% 74-126 <br /> Page 7 of 8 Page 7 of 8 <br />