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February 10, 2023 <br /> Lab No. : STK2330537 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 01/18/2023:200574AMM ND mg/L 1.60% 10 <br /> Bicarbonate 2320B (STK2330679-003) Dup mg/L 1.60% 10 <br /> E.C. 2320B (STK2330679-003) Dup umhos/cm 0.2% 5 <br /> Solids,Total Dissolved 2540CE 01/16/2023:200394CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 99.6% 90-110 <br /> (CC 2380157-001) Dup mg/L 1.7% 5 <br /> (CC 2380157-001) Dup mg/L 0.7% 5 <br /> Chloride 300.0 01/13/2023:200390LDM Blank mg/L 1 <1 <br /> LCS mg/L 25.00 94.9% 90-110 <br /> MS mg/L 50.00 83.7% 85-121 435 <br /> (SP 2300536-002) MSD mg/L 50.00 87.9% 85-121 <br /> MSRPD mg/L 10.00 2.2% 5519 <br /> MS mg/L 50.00 78.6% 85-121 435 <br /> (SP 2300535-001) MSD mg/L 50.00 85.6% 85-121 <br /> MSRPD mg/L 10.00 3.5% 5519 <br /> Fluoride 300.0 01/13/2023:200390LDM Blank mg/L 1 <0.1 <br /> LCS mg/L 2.500 96.6% 90-110 <br /> MS mg/L 5.000 98.6% 87-120 <br /> (SP 2300536-002) MSD mg/L 5.000 103% 87-120 <br /> MSRPD mg/L 10.00 4.5% 5_16 <br /> MS mg/L 5.000 94.1 % 87-120 <br /> (SP 2300535-001) MSD mg/L 5.000 103% 87-120 <br /> MSRPD mg/L 10.00 7.8% .516 <br /> Nitrate 300.0 01/13/2023:200390LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 94.5% 90-110 <br /> MS mg/L 40.00 98.1 % 85-119 <br /> (SP 2300536-002) MSD mg/L 40.00 103% 85-119 <br /> MSRPD mg/L 10.00 4.8% :519 <br /> MS mg/L 40.00 83.4% 85-119 435 <br /> (SP 2300535-001) MSD mg/L 40.00 90.6% 85-119 <br /> MSRPD mg/L 10.00 4.4% 5519 <br /> Nitrate+Nitrite as N 300.0 01/13/2023:200390LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 94.5% 90-110 <br /> MS mg/L 40.00 98.1 % 85-119 <br /> (SP 2300536-002) MSD mg/L 40.00 103% 85-119 <br /> MSRPD mg/L 10.00 4.8% :519 <br /> MS mg/L 40.00 83.4% 85-119 435 <br /> (SP 2300535-001) MSD mg/L 40.00 90.6% 85-119 <br /> MSRPD mg/L 10.00 4.4% :519 <br /> Nitrate Nitrogen 300.0 01/13/2023:200390LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 94.5% 90-110 <br /> MS mg/L 40.00 98.1 % 85-119 <br /> (SP 2300536-002) MSD mg/L 40.00 103% 85-119 <br /> MSRPD mg/L 10.00 4.8% :519 <br /> MS mg/L 40.00 83.4% 85-119 435 <br /> (SP 2300535-001) MSD mg/L 40.00 90.6% 85-119 <br /> MSRPD mg/L 10.00 4.4% :519 <br /> Nitrite as Nitrogen 300.0 01/13/2023:200390LDM Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 94.9% 90-110 <br /> MS mg/L 30.00 97.1 % 74-126 <br /> Page 6 of 7 Page 6 of 7 <br />