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June 14, 2024 <br /> Lab No. : STK2438272 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (SP 2409470-002) Dup mg/L 0.07% 10 <br /> Bicarbonate 2320B (SP 2409470-002) Dup mg/L 0.08% 10 <br /> Carbonate 2320B (SP 2409470-002) Dup mg/L 0% 10 <br /> E.C. 2320B (SP 2409470-002) Dup umhos/cm 0.2% 5 <br /> Hydroxide 2320B (SP 2409470-002) Dup mg/L 0% 10 <br /> Solids,Total Dissolved 2540CE 06/10/2024:206456CTL Blank mg/L ND <20 <br /> LCS mg/L 990.5 97.6% 90-110 <br /> (SP 2409223-005) Dup mg/L 2.06% 5 <br /> (SP 2409223-005) Dup mg/L 0.09% 5 <br /> Chloride 300.0 06/07/2024:206377LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 103% 90-110 <br /> MS mg/L 50.00 103% 67-117 <br /> (STK2438272-001) MSD mg/L 50.00 103% 67-117 <br /> MSRPD mg/L 0.1% :57 <br /> MS mg/L 50.00 97.5% 67-117 <br /> (STK2438270-001) MSD mg/L 50.00 97.3% 67-117 <br /> MSRPD mg/L 0.2% <_7 <br /> Fluoride 300.0 06/07/2024:206377LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 102% 90-110 <br /> MS mg/L 5.000 103% 89-111 <br /> (STK2438272-001) MSD mg/L 5.000 102% 89-111 <br /> MSRPD mg/L 0.5% :59 <br /> MS mg/L 5.000 103% 89-111 <br /> (STK2438270-001) MSD mg/L 5.000 102% 89-111 <br /> MSRPD mg/L 0.5% :59 <br /> Nitrate 300.0 06/07/2024:206377LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 103% 90-110 <br /> MS mg/L 40.00 105% 86-112 <br /> (STK2438272-001) MSD mg/L 40.00 104% 86-112 <br /> MSRPD mg/L 0.3% :57 <br /> MS mg/L 40.00 101% 86-112 <br /> (STK2438270-001) MSD mg/L 40.00 100% 86-112 <br /> MSRPD mg/L 0.3% :57 <br /> Nitrate+Nitrite as N 300.0 06/07/2024:206377LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 103% 90-110 <br /> MS mg/L 40.00 105% 86-112 <br /> (STK2438272-001) MSD mg/L 40.00 104% 86-112 <br /> MSRPD mg/L 0.3% :57 <br /> MS mg/L 40.00 101% 86-112 <br /> (STK2438270-001) MSD mg/L 40.00 100% 86-112 <br /> MSRPD mg/L 0.3% :57 <br /> Nitrate Nitrogen 300.0 06/07/2024:206377LDM Blank mg/L ND <0.1 <br /> LCS mg/L 4.518 103% 90-110 <br /> MS mg/L 9.036 105% 86-112 <br /> (STK2438272-001) MSD mg/L 9.036 104% 86-112 <br /> MSRPD mg/L 0.3% :57 <br /> MS mg/L 9.036 100% 86-112 <br /> (STK2438270-001) MSD mg/L 9.036 100% 86-112 <br /> MSRPD mg/L 0.3% :57 <br /> Nitrite as Nitrogen 300.0 06/07/2024:206377LDM Blank mg/L ND <0.1 <br /> Page 6 of 7 Page 6 of 7 <br />