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September 29, 2022 <br /> Lab No. : STK2252686 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 09/13/2022:210433AMM ND mg/L 0.03% 10 <br /> Bicarbonate 2320B (CC 2283369-001) Dup mg/L 0% 10 <br /> E.C. 2320B (CC 2283369-001) Dup umhos/cm 0% 5 <br /> Solids,Total Dissolved 2540CE 09/09/2022:210245CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 101 % 90-110 <br /> (SP 2214320-001) Dup mg/L 1.4% 5 <br /> (SP 2214320-001) Dup mg/L 0.5% 5 <br /> Chloride 300.0 09/08/2022:210280LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 101 % 90-110 <br /> MS mg/L 50.00 86.8% 85-121 <br /> (VI 2246211-001) MSD mg/L 50.00 99.6% 85-121 <br /> MSRPD mg/L 50.00 12.0% 5519 <br /> MS mg/L 50.00 56.6% 85-121 435 <br /> (STK2251622-001) MSD mg/L 50.00 69.7% 85-121 435 <br /> MSRPD mg/L 50.00 5.2% 5519 <br /> Fluoride 300.0 09/08/2022:210280LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 105% 90-110 <br /> MS mg/L 5.000 90.1 % 87-120 <br /> (VI 2246211-001) MSD mg/L 5.000 103% 87-120 <br /> MSRPD mg/L 50.00 13.2% 5_16 <br /> MS mg/L 5.000 94.0% 87-120 <br /> (STK2251622-001) MSD mg/L 5.000 107% 87-120 <br /> MSRPD mg/L 50.00 12.9% .516 <br /> Nitrate 300.0 09/08/2022:210280LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 104% 90-110 <br /> MS mg/L 40.00 88.3% 85-119 <br /> (VI 2246211-001) MSD mg/L 40.00 101 % 85-119 <br /> MSRPD mg/L 50.00 11.3% :519 <br /> MS mg/L 40.00 93.9% 85-119 <br /> (STK2251622-001) MSD mg/L 40.00 107% 85-119 <br /> MSRPD mg/L 50.00 13.2% 5519 <br /> Nitrate+Nitrite as N 300.0 09/08/2022:210280LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 104% 90-110 <br /> MS mg/L 40.00 88.3% 85-119 <br /> (VI 2246211-001) MSD mg/L 40.00 101 % 85-119 <br /> MSRPD mg/L 50.00 11.3% :519 <br /> MS mg/L 40.00 93.9% 85-119 <br /> (STK2251622-001) MSD mg/L 40.00 107% 85-119 <br /> MSRPD mg/L 50.00 13.2% :519 <br /> Nitrate Nitrogen 300.0 09/08/2022:210280LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 104% 90-110 <br /> MS mg/L 40.00 88.3% 85-119 <br /> (VI 2246211-001) MSD mg/L 40.00 101 % 85-119 <br /> MSRPD mg/L 50.00 11.3% :519 <br /> MS mg/L 40.00 93.9% 85-119 <br /> (STK2251622-001) MSD mg/L 40.00 107% 85-119 <br /> MSRPD mg/L 50.00 13.2% :519 <br /> Nitrite as Nitrogen 300.0 09/08/2022:210280LDM Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 103% 90-110 <br /> MS mg/L 30.00 89.3% 74-126 <br /> Page 6 of 7 Page 6 of 7 <br />