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October 18, 2022 <br /> Lab No. : STK2254407 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 10/10/2022:211564AMM ND mg/L 10.8% 10 <br /> Bicarbonate 2320B (VI 2248010-001) Dup mg/L 10.8% 10 440 <br /> E.C. 2320B (VI 2248010-001) Dup umhos/cm 0.2% 5 <br /> pH 2320B (VI 2248010-001) Dup units 0.2% 4.80 <br /> Solids,Total Dissolved 2540CE 10/10/2022:211533CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 101 % 90-110 <br /> (VI 2247878-001) Dup mg/L 1.2% 5 <br /> (VI 2247878-001) Dup mg/L 0.6% 5 <br /> Chloride 300.0 10/07/2022:211559LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 105% 90-110 <br /> MS mg/L 50.00 74.4% 85-121 435 <br /> (VI 2248010-001) MSD mg/L 50.00 76.8% 85-121 435 <br /> MSRPD mg/L 10.00 1.2% :519 <br /> MS mg/L 50.00 111 % 85-121 <br /> (STK2254407-001) MSD mg/L 50.00 100% 85-121 <br /> MSRPD mg/L 10.00 6.5% :519 <br /> Fluoride 300.0 10/07/2022:211559LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 107% 90-110 <br /> MS mg/L 5.000 106% 87-120 <br /> (VI 2248010-001) MSD mg/L 5.000 106% 87-120 <br /> MSRPD mg/L 10.00 0.8% :516 <br /> MS mg/L 5.000 112% 87-120 <br /> (STK2254407-001) MSD mg/L 5.000 106% 87-120 <br /> MSRPD mg/L 10.00 5.6% :516 <br /> Nitrate 300.0 10/07/2022:211559LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 101 % 90-110 <br /> MS mg/L 40.00 97.5% 85-119 <br /> (VI 2248010-001) MSD mg/L 40.00 97.7% 85-119 <br /> MSRPD mg/L 10.00 0.1% :519 <br /> MS mg/L 40.00 89.4% 85-119 <br /> (STK2254407-001) MSD mg/L 40.00 83.7% 85-119 435 <br /> MSRPD mg/L 10.00 2.9% :519 <br /> Nitrate+Nitrite as N 300.0 10/07/2022:211559LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 101 % 90-110 <br /> MS mg/L 40.00 97.5% 85-119 <br /> (VI 2248010-001) MSD mg/L 40.00 97.7% 85-119 <br /> MSRPD mg/L 10.00 0.1% :519 <br /> MS mg/L 40.00 89.4% 85-119 <br /> (STK2254407-001) MSD mg/L 40.00 83.7% 85-119 435 <br /> MSRPD mg/L 10.00 2.9% :519 <br /> Nitrate Nitrogen 300.0 10/07/2022:211559LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 101 % 90-110 <br /> MS mg/L 40.00 97.5% 85-119 <br /> (VI 2248010-001) MSD mg/L 40.00 97.7% 85-119 <br /> MSRPD mg/L 10.00 0.1% 5519 <br /> MS mg/L 40.00 89.4% 85-119 <br /> (STK2254407-001) MSD mg/L 40.00 83.7% 85-119 435 <br /> MSRPD mg/L 10.00 2.9% :519 <br /> Nitrite as Nitrogen 300.0 10/07/2022:211559LDM Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 107% 90-110 <br /> Page 8 of 9 Page 8 of 9 <br />