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September 12, 2022 <br /> Lab No. : STK2252062 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 09/03/2022:210049AMM ND mg/L 0.06% 10 <br /> Bicarbonate 2320B (SP 2213721-001) Dup mg/L 0.04% 10 <br /> E.C. 2510B O8/30/2022:209846STA Blank umhos/cm ND <1 <br /> (STK2251774-009) Dup umhos/cm 0.8% 5 <br /> Solids,Total Dissolved 2540CE 08/26/2022:209709CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 99.8% 90-110 <br /> (SP 2213785-001) Dup mg/L 1.7% 5 <br /> (SP 2213785-001) Dup mg/L 5.1% 5 440 <br /> Chloride 300.0 08/25/2022:209696LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 101 % 90-110 <br /> MS mg/L 50.00 97.5% 85-121 <br /> (VI 2246139-001) MSD mg/L 50.00 98.4% 85-121 <br /> MSRPD mg/L 10.00 0.8% :519 <br /> MS mg/L 50.00 93.0% 85-121 <br /> (VI 2246196-002) MSD mg/L 50.00 93.1 % 85-121 <br /> MSRPD mg/L 10.00 0.1% 5519 <br /> Fluoride 300.0 08/25/2022:209696LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 102% 90-110 <br /> MS mg/L 5.000 103% 87-120 <br /> (VI 2246139-001) MSD mg/L 5.000 103% 87-120 <br /> MSRPD mg/L 10.00 0.6% :516 <br /> MS mg/L 5.000 102% 87-120 <br /> (VI 2246196-002) MSD mg/L 5.000 102% 87-120 <br /> MSRPD mg/L 10.00 0.2% 5_16 <br /> Nitrate 300.0 08/25/2022:209696LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 102% 90-110 <br /> MS mg/L 40.00 98.6% 85-119 <br /> (VI 2246139-001) MSD mg/L 40.00 99.5% 85-119 <br /> MSRPD mg/L 10.00 0.7% :519 <br /> MS mg/L 40.00 91.1 % 85-119 <br /> (VI 2246196-002) MSD mg/L 40.00 91.2% 85-119 <br /> MSRPD mg/L 10.00 0.1% :519 <br /> Nitrate+Nitrite as N 300.0 08/25/2022:209696LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 102% 90-110 <br /> MS mg/L 40.00 98.6% 85-119 <br /> (VI 2246139-001) MSD mg/L 40.00 99.5% 85-119 <br /> MSRPD mg/L 10.00 0.7% :519 <br /> MS mg/L 40.00 91.1 % 85-119 <br /> (VI 2246196-002) MSD mg/L 40.00 91.2% 85-119 <br /> MSRPD mg/L 10.00 0.1% :519 <br /> Nitrate Nitrogen 300.0 08/25/2022:209696LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 102% 90-110 <br /> MS mg/L 40.00 98.6% 85-119 <br /> (VI 2246139-001) MSD mg/L 40.00 99.5% 85-119 <br /> MSRPD mg/L 10.00 0.7% 5519 <br /> MS mg/L 40.00 91.1 % 85-119 <br /> (VI 2246196-002) MSD mg/L 40.00 91.2% 85-119 <br /> MSRPD mg/L 10.00 0.1% :519 <br /> Nitrite as Nitrogen 300.0 08/25/2022:209696LDM Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 102% 90-110 <br /> Page 6 of 7 Page 6 of 7 <br />