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October 14, 2022 <br /> Lab No. : STK2252817 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 09/19/2022:210610AMM ND mg/L 82700000 10 <br /> Bicarbonate 2320B (SP 2214419-001) Dup mg/L 0% 10 <br /> E.C. 2320B (SP 2214419-001) Dup umhos/cm 0.2% 5 <br /> Solids,Total Dissolved 2540CE 09/12/2022:210353CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 99.7% 90-110 <br /> (STK2252817-001) Dup mg/L 1.0% 5 <br /> (STK2252817-001) Dup mg/L 1.8% 5 <br /> Chloride 300.0 09/09/2022:210269LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 99.5% 90-110 <br /> MS mg/L 50.00 95.3% 85-121 <br /> (VI 2246203-001) MSD mg/L 50.00 101 % 85-121 <br /> MSRPD mg/L 50.00 4.9% 5519 <br /> MS mg/L 50.00 92.9% 85-121 <br /> (VI 2246203-005) MSD mg/L 50.00 100% 85-121 <br /> MSRPD mg/L 5.000 6.0% 5519 <br /> Fluoride 300.0 09/09/2022:210269LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 103% 90-110 <br /> MS mg/L 5.000 101 % 87-120 <br /> (VI 2246203-001) MSD mg/L 5.000 107% 87-120 <br /> MSRPD mg/L 50.00 6.1% 5_16 <br /> MS mg/L 5.000 98.5% 87-120 <br /> (VI 2246203-005) MSD mg/L 5.000 106% 87-120 <br /> MSRPD mg/L 5.000 7.4% .516 <br /> Nitrate 300.0 09/09/2022:210269LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 102% 90-110 <br /> MS mg/L 40.00 91.8% 85-119 <br /> (VI 2246203-001) MSD mg/L 40.00 97.4% 85-119 <br /> MSRPD mg/L 50.00 3.7% :519 <br /> MS mg/L 40.00 89.4% 85-119 <br /> (VI 2246203-005) MSD mg/L 40.00 96.2% 85-119 <br /> MSRPD mg/L 5.000 4.5% 5519 <br /> Nitrate+Nitrite as N 300.0 09/09/2022:210269LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 102% 90-110 <br /> MS mg/L 40.00 91.8% 85-119 <br /> (VI 2246203-001) MSD mg/L 40.00 97.4% 85-119 <br /> MSRPD mg/L 50.00 3.7% :519 <br /> MS mg/L 40.00 89.4% 85-119 <br /> (VI 2246203-005) MSD mg/L 40.00 96.2% 85-119 <br /> MSRPD mg/L 5.000 4.5% :519 <br /> Nitrate Nitrogen 300.0 09/09/2022:210269LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 102% 90-110 <br /> MS mg/L 40.00 91.8% 85-119 <br /> (VI 2246203-001) MSD mg/L 40.00 97.4% 85-119 <br /> MSRPD mg/L 50.00 3.7% :519 <br /> MS mg/L 40.00 89.4% 85-119 <br /> (VI 2246203-005) MSD mg/L 40.00 96.2% 85-119 <br /> MSRPD mg/L 5.000 4.5% :519 <br /> Nitrite as Nitrogen 300.0 09/09/2022:210269LDM Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 101 % 90-110 <br /> MS mg/L 30.00 99.0% 74-126 <br /> Page 7 of 8 Page 7 of 8 <br />