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June 11, 2024 <br /> Lab No. : STK2437397 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (STK2437376-001) Dup mg/L 0.01% 10 <br /> Bicarbonate 2320B (STK2437376-001) Dup mg/L 0% 10 <br /> Carbonate 2320B (STK2437376-001) Dup mg/L 0% 10 <br /> E.C. 2320B (STK2437376-001) Dup umhos/cm 0.7% 5 <br /> Hydroxide 2320B (STK2437376-001) Dup mg/L 0% 10 <br /> Solids,Total Dissolved 2540CE 05/24/2024:205851CTL Blank mg/L ND <20 <br /> LCS mg/L 992.0 99.1% 90-110 <br /> (STK2437334-011) Dup mg/L 1.79% 5 <br /> (STK2437334-011) Dup mg/L 1% 5 <br /> Chloride 300.0 05/23/2024:205812LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 96.5% 90-110 <br /> MS mg/L 50.00 94.5% 67-117 <br /> (SP 2408170-001) MSD mg/L 50.00 94.5% 67-117 <br /> MSRPD mg/L 0.0% :57 <br /> MS mg/L 50.00 94.2% 67-117 <br /> (SP 2408198-003) MSD mg/L 50.00 94.4% 67-117 <br /> MSRPD mg/L 0.1% <_7 <br /> Fluoride 300.0 05/23/2024:205812LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 97.8% 90-110 <br /> MS mg/L 5.000 98.8% 89-111 <br /> (SP 2408170-001) MSD mg/L 5.000 98.8% 89-111 <br /> MSRPD mg/L 0.0% :59 <br /> MS mg/L 5.000 101% 89-111 <br /> (SP 2408198-003) MSD mg/L 5.000 101% 89-111 <br /> MSRPD mg/L 0.1% :59 <br /> Nitrate 300.0 05/23/2024:205812LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 97.0% 90-110 <br /> MS mg/L 40.00 97.9% 86-112 <br /> (SP 2408170-001) MSD mg/L 40.00 97.9% 86-112 <br /> MSRPD mg/L 0.0% :57 <br /> MS mg/L 40.00 100% 86-112 <br /> (SP 2408198-003) MSD mg/L 40.00 100% 86-112 <br /> MSRPD mg/L 0.1% :57 <br /> Nitrate+Nitrite as N 300.0 05/23/2024:205812LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 97.0% 90-110 <br /> MS mg/L 40.00 97.9% 86-112 <br /> (SP 2408170-001) MSD mg/L 40.00 97.9% 86-112 <br /> MSRPD mg/L 0.0% :57 <br /> MS mg/L 40.00 100% 86-112 <br /> (SP 2408198-003) MSD mg/L 40.00 100% 86-112 <br /> MSRPD mg/L 0.1% :57 <br /> Nitrate Nitrogen 300.0 05/23/2024:205812LDM Blank mg/L ND <0.1 <br /> LCS mg/L 4.518 97.0% 90-110 <br /> MS mg/L 9.036 97.9% 86-112 <br /> (SP 2408170-001) MSD mg/L 9.036 97.9% 86-112 <br /> MSRPD mg/L 0.0% :57 <br /> MS mg/L 9.036 100% 86-112 <br /> (SP 2408198-003) MSD mg/L 9.036 100% 86-112 <br /> MSRPD mg/L 0.1% :57 <br /> Nitrite as Nitrogen 300.0 05/23/2024:205812LDM Blank mg/L ND <0.1 <br /> Page 6 of 7 Page 6 of 7 <br />