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September 6, 2024 <br /> Lab No. : STK2451925 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (STK2451951-001) Dup mg/L 0.1% 10 <br /> Bicarbonate 2320B (STK2451951-001) Dup mg/L 0% 10 <br /> Carbonate 2320B (STK2451951-001) Dup mg/L 0% 10 <br /> E.C. 2320B (STK2451951-001) Dup umhos/cm 0.8% 5 <br /> Hydroxide 2320B (STK2451951-001) Dup mg/L 0% 10 <br /> Solids,Total Dissolved 2540CE 08/14/2024:209074CTL Blank mg/L ND <20 <br /> LCS mg/L 991.1 98.8% 90-110 <br /> (SP 2412923-001) Dup mg/L 1.26% 5 <br /> (SP 2412923-001) Dup mg/L 1.21% 5 <br /> Chloride 300.0 08/14/2024:209094LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 104% 90-110 <br /> MS mg/L 50.00 93.9% 67-117 <br /> (CC 2482938-008) MSD mg/L 50.00 94.0% 67-117 <br /> MSRPD mg/L 0.1% :57 <br /> MS mg/L 50.00 74.2% 67-117 <br /> (CC 2482939-011) MSD mg/L 50.00 79.2% 67-117 <br /> MSRPD mg/L 1.7% :57 <br /> Fluoride 300.0 08/14/2024:209094LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 105% 90-110 <br /> MS mg/L 5.000 104% 89-111 <br /> (CC 2482938-008) MSD mg/L 5.000 105% 89-111 <br /> MSRPD mg/L 0.9% :59 <br /> MS mg/L 5.000 106% 89-111 <br /> (CC 2482939-011) MSD mg/L 5.000 107% 89-111 <br /> MSRPD mg/L 1.2% :59 <br /> Nitrate 300.0 08/14/2024:209094LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 105% 90-110 <br /> MS mg/L 40.00 76.3% 86-112 435 <br /> (CC 2482938-008) MSD mg/L 40.00 78.0% 86-112 435 <br /> MSRPD mg/L 0.7% :57 <br /> MS mg/L 40.00 103% 86-112 <br /> (CC 2482939-011) MSD mg/L 40.00 104% 86-112 <br /> MSRPD mg/L 0.2% :57 <br /> Nitrate+Nitrite as N 300.0 08/14/2024:209094LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 105% 90-110 <br /> MS mg/L 40.00 76.3% 86-112 435 <br /> (CC 2482938-008) MSD mg/L 40.00 78.0% 86-112 435 <br /> MSRPD mg/L 0.7% 157 <br /> MS mg/L 40.00 103% 86-112 <br /> (CC 2482939-011) MSD mg/L 40.00 104% 86-112 <br /> MSRPD mg/L 0.2% :57 <br /> Nitrate Nitrogen 300.0 08/14/2024:209094LDM Blank mg/L ND <0.1 <br /> LCS mg/L 4.518 105% 90-110 <br /> MS mg/L 9.036 76.3% 86-112 435 <br /> (CC 2482938-008) MSD mg/L 9.036 77.9% 86-112 435 <br /> MSRPD mg/L 0.7% :57 <br /> MS mg/L 9.036 103% 86-112 <br /> (CC 2482939-011) MSD mg/L 9.036 104% 86-112 <br /> MSRPD mg/L 0.2% :57 <br /> Nitrite as Nitrogen 300.0 08/14/2024:209094LDM Blank mg/L ND <0.1 <br /> Page 6 of 7 Page 6 of 7 <br />