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June 28, 2024 <br /> Lab No. : STK2438457 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (SP 2409691-001) Dup mg/L 0.8% 10 <br /> Bicarbonate 2320B (SP 2409691-001) Dup mg/L 0.8% 10 <br /> Carbonate 2320B (SP 2409691-001) Dup mg/L 0% 10 <br /> E.C. 2320B (SP 2409691-001) Dup umhos/cm 0.3% 5 <br /> Hydroxide 2320B (SP 2409691-001) Dup mg/L 0% 10 <br /> Solids,Total Dissolved 2540CE 06/12/2024:206519CTL Blank mg/L ND <20 <br /> LCS mg/L 990.5 98.1% 90-110 <br /> (SP 2409355-002) Dup mg/L 0.9% 5 <br /> (SP 2409355-002) Dup mg/L 2.35% 5 <br /> Chloride 300.0 06/11/2024:206531LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 102% 90-110 <br /> MS mg/L 50.00 80.9% 67-117 <br /> (SP 2409355-002) MSD mg/L 50.00 75.8% 67-117 <br /> MSRPD mg/L 2.7% :57 <br /> MS mg/L 50.00 91.8% 67-117 <br /> (SP 2409355-006) MSD mg/L 50.00 92.0% 67-117 <br /> MSRPD mg/L 0.1% <_7 <br /> Fluoride 300.0 06/11/2024:206531LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 100% 90-110 <br /> MS mg/L 5.000 102% 89-111 <br /> (SP 2409355-002) MSD mg/L 5.000 101% 89-111 <br /> MSRPD mg/L 1.0% :59 <br /> MS mg/L 5.000 104% 89-111 <br /> (SP 2409355-006) MSD mg/L 5.000 104% 89-111 <br /> MSRPD mg/L 0.1% :59 <br /> Nitrate 300.0 06/11/2024:206531LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 102% 90-110 <br /> MS mg/L 40.00 99.7% 86-112 <br /> (SP 2409355-002) MSD mg/L 40.00 99.7% 86-112 <br /> MSRPD mg/L 0.0% :57 <br /> MS mg/L 40.00 82.7% 86-112 435 <br /> (SP 2409355-006) MSD mg/L 40.00 83.6% 86-112 435 <br /> MSRPD mg/L 0.4% :57 <br /> Nitrate+Nitrite as N 300.0 06/11/2024:206531LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 102% 90-110 <br /> MS mg/L 40.00 99.7% 86-112 <br /> (SP 2409355-002) MSD mg/L 40.00 99.7% 86-112 <br /> MSRPD mg/L 0.0% :57 <br /> MS mg/L 40.00 82.7% 86-112 435 <br /> (SP 2409355-006) MSD mg/L 40.00 83.6% 86-112 435 <br /> MSRPD mg/L 0.4% :57 <br /> Nitrate Nitrogen 300.0 06/11/2024:206531LDM Blank mg/L ND <0.1 <br /> LCS mg/L 4.518 102% 90-110 <br /> MS mg/L 9.036 99.7% 86-112 <br /> (SP 2409355-002) MSD mg/L 9.036 99.7% 86-112 <br /> MSRPD mg/L 0.0% :57 <br /> MS mg/L 9.036 82.7% 86-112 435 <br /> (SP 2409355-006) MSD mg/L 9.036 83.5% 86-112 435 <br /> MSRPD mg/L 0.4% :57 <br /> Nitrite as Nitrogen 300.0 06/11/2024:206531LDM Blank mg/L ND <0.1 <br /> Page 6 of 7 Page 6 of 7 <br />