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August 9, 2023 <br /> Lab No. : STK2339871 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 07/29/2023:208395AMM ND mg/L 0.9% 10 406 <br /> Bicarbonate 2320B (STK2339871-001) Dup mg/L 0.8% 10 <br /> E.C. 2320B (STK2339871-001) Dup umhos/cm 0.2% 5 <br /> Solids,Total Dissolved 2540CE 07/26/2023:208247CTL Blank mg/L ND <20 <br /> LCS mg/L 991.5 98.3% 90-110 <br /> (SP 2312647-003) Dup mg/L 1.67% 5 <br /> (SP 2312647-003) Dup mg/L 4.52% 5 <br /> Chloride 300.0 07/25/2023:208251LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 101 % 90-110 <br /> MS mg/L 50.00 91.0% 85-121 <br /> (STK2339248-001) MSD mg/L 50.00 87.6% 85-121 <br /> MSRPD mg/L 10.00 2.0% 5519 <br /> MS mg/L 50.00 87.0% 85-121 <br /> (SP 2312135-005) MSD mg/L 50.00 84.8% 85-121 <br /> MSRPD mg/L 10.00 1.1% 5519 <br /> Fluoride 300.0 07/25/2023:208251LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 101 % 90-110 <br /> MS mg/L 5.000 102% 87-120 <br /> (STK2339248-001) MSD mg/L 5.000 98.8% 87-120 <br /> MSRPD mg/L 10.00 3.5% 5_16 <br /> MS mg/L 5.000 102% 87-120 <br /> (SP 2312135-005) MSD mg/L 5.000 99.4% 87-120 <br /> MSRPD mg/L 10.00 2.1% .516 <br /> Nitrate 300.0 07/25/2023:208251LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 100% 90-110 <br /> MS mg/L 40.00 99.3% 85-119 <br /> (STK2339248-001) MSD mg/L 40.00 95.7% 85-119 <br /> MSRPD mg/L 10.00 2.8% :519 <br /> MS mg/L 40.00 102% 85-119 <br /> (SP 2312135-005) MSD mg/L 40.00 99.8% 85-119 <br /> MSRPD mg/L 10.00 2.1% 5519 <br /> Nitrate+Nitrite as N 300.0 07/25/2023:208251LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 100% 90-110 <br /> MS mg/L 40.00 99.3% 85-119 <br /> (STK2339248-001) MSD mg/L 40.00 95.7% 85-119 <br /> MSRPD mg/L 10.00 2.8% :519 <br /> MS mg/L 40.00 102% 85-119 <br /> (SP 2312135-005) MSD mg/L 40.00 99.8% 85-119 <br /> MSRPD mg/L 10.00 2.1% :519 <br /> Nitrate Nitrogen 300.0 07/25/2023:208251LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 100% 90-110 <br /> MS mg/L 40.00 99.3% 85-119 <br /> (STK2339248-001) MSD mg/L 40.00 95.7% 85-119 <br /> MSRPD mg/L 10.00 2.8% :519 <br /> MS mg/L 40.00 102% 85-119 <br /> (SP 2312135-005) MSD mg/L 40.00 99.8% 85-119 <br /> MSRPD mg/L 10.00 2.1% :519 <br /> Nitrite as Nitrogen 300.0 07/25/2023:208251LDM Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 99.7% 90-110 <br /> MS mg/L 30.00 79.7% 74-126 <br /> Page 6 of 7 Page 6 of 7 <br />