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February 1, 2024 <br /> Lab No. : STK2431321 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (VI 2440687-001) Dup mg/L 1.46% 10 <br /> Bicarbonate 2320B (VI 2440687-001) Dup mg/L 1.44% 10 <br /> E.C. 2320B (VI 2440687-001) Dup umhos/cm 0.4% 5 <br /> Solids,Total Dissolved 2540CE 01/29/2024:201103CTL Blank mg/L ND <20 <br /> LCS mg/L 992.0 102% 90-110 <br /> (SP 2401364-002) Dup mg/L 1.70% 5 <br /> (SP 2401364-002) Dup mg/L 0.06% 5 <br /> Chloride 300.0 01/26/2024:201081LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 100% 90-110 <br /> MS mg/L 50.00 93.3% 67-117 <br /> (STK2431352-001) MSD mg/L 50.00 94.2% 67-117 <br /> MSRPD mg/L 0.6% <_7 <br /> MS mg/L 50.00 100% 67-117 <br /> (STK2431321-001) MSD mg/L 50.00 100% 67-117 <br /> MSRPD mg/L 0.2% :57 <br /> Fluoride 300.0 01/26/2024:201081LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 101% 90-110 <br /> MS mg/L 5.000 103% 89-111 <br /> (STK2431352-001) MSD mg/L 5.000 104% 89-111 <br /> MSRPD mg/L 0.3% :59 <br /> MS mg/L 5.000 103% 89-111 <br /> (STK2431321-001) MSD mg/L 5.000 103% 89-111 <br /> MSRPD mg/L 0.4% :59 <br /> Nitrate 300.0 01/26/2024:201081LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.3% 90-110 <br /> MS mg/L 40.00 99.4% 86-112 <br /> (STK2431352-001) MSD mg/L 40.00 100% 86-112 <br /> MSRPD mg/L 0.5% :57 <br /> MS mg/L 40.00 102% 86-112 <br /> (STK2431321-001) MSD mg/L 40.00 102% 86-112 <br /> MSRPD mg/L 0.2% <_7 <br /> Nitrate+Nitrite as N 300.0 01/26/2024:201081LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.3% 90-110 <br /> MS mg/L 40.00 99.4% 86-112 <br /> (STK2431352-001) MSD mg/L 40.00 100% 86-112 <br /> MSRPD mg/L 0.5% :57 <br /> MS mg/L 40.00 102% 86-112 <br /> (STK2431321-001) MSD mg/L 40.00 102% 86-112 <br /> MSRPD mg/L 0.2% <_7 <br /> Nitrate Nitrogen 300.0 01/26/2024:201081LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.3% 90-110 <br /> MS mg/L 40.00 99.4% 86-112 <br /> (STK2431352-001) MSD mg/L 40.00 100% 86-112 <br /> MSRPD mg/L 0.5% :57 <br /> MS mg/L 40.00 102% 86-112 <br /> (STK2431321-001) MSD mg/L 40.00 102% 86-112 <br /> MSRPD mg/L 0.2% :57 <br /> Nitrite as Nitrogen 300.0 01/26/2024:201081LDM Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 103% 90-110 <br /> MS mg/L 30.00 103% 88-111 <br /> Page 6 of 7 Page 6 of 7 <br />