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September 29, 2022 <br /> Lab No. : STK2252281 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 09/12/2022:210298AMM ND mg/L 92.8% 10 435 <br /> Bicarbonate 2320B (CH 2277432-001) Dup mg/L 120% 10 440 <br /> E.C. 2320B (CH 2277509-007) Dup umhos/cm 0.5% 5 <br /> Solids,Total Dissolved 2540CE 09/01/2022:209964CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 100% 90-110 <br /> (SP 2214056-001) Dup mg/L 2.9% 5 <br /> (SP 2214056-001) Dup mg/L 1.6% 5 <br /> Chloride 300.0 08/31/2022:209925LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 101 % 90-110 <br /> MS mg/L 50.00 92.3% 85-121 <br /> (VI 2246204-006) MSD mg/L 50.00 106% 85-121 <br /> MSRPD mg/L 50.00 12.0% 5519 <br /> MS mg/L 50.00 -104% <'A <br /> (SP 2213182-003) MSD mg/L 50.00 -33.6% <'A <br /> MSRPD mg/L 50.00 6.3% 5519 <br /> Fluoride 300.0 08/31/2022:209925LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 108% 90-110 <br /> MS mg/L 5.000 97.5% 87-120 <br /> (VI 2246204-006) MSD mg/L 5.000 109% 87-120 <br /> MSRPD mg/L 50.00 11.0% 5_16 <br /> MS mg/L 5.000 96.8% 87-120 <br /> (SP 2213182-003) MSD mg/L 5.000 104% 87-120 <br /> MSRPD mg/L 50.00 5.5% .516 <br /> Nitrate 300.0 08/31/2022:209925LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 107% 90-110 <br /> MS mg/L 40.00 80.9% 85-119 435 <br /> (VI 2246204-006) MSD mg/L 40.00 92.5% 85-119 <br /> MSRPD mg/L 50.00 6.6% :519 <br /> MS mg/L 40.00 99.0% 85-119 <br /> (SP 2213182-003) MSD mg/L 40.00 106% 85-119 <br /> MSRPD mg/L 50.00 6.4% 5519 <br /> Nitrate+Nitrite as N 300.0 08/31/2022:209925LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 107% 90-110 <br /> MS mg/L 40.00 80.9% 85-119 435 <br /> (VI 2246204-006) MSD mg/L 40.00 92.5% 85-119 <br /> MSRPD mg/L 50.00 6.6% :519 <br /> MS mg/L 40.00 99.0% 85-119 <br /> (SP 2213182-003) MSD mg/L 40.00 106% 85-119 <br /> MSRPD mg/L 50.00 6.4% :519 <br /> Nitrate Nitrogen 300.0 08/31/2022:209925LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 107% 90-110 <br /> MS mg/L 40.00 80.9% 85-119 435 <br /> (VI 2246204-006) MSD mg/L 40.00 92.5% 85-119 <br /> MSRPD mg/L 50.00 6.6% :519 <br /> MS mg/L 40.00 99.0% 85-119 <br /> (SP 2213182-003) MSD mg/L 40.00 106% 85-119 <br /> MSRPD mg/L 50.00 6.4% :519 <br /> Nitrite as Nitrogen 300.0 08/31/2022:209925LDM Blank mg/L 1 <0.4 <br /> LCS mg/L 15.00 102% 90-110 <br /> MS mg/L 30.00 92.1 % 74-126 <br /> Page 6 of 7 Page 6 of 7 <br />