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June 10, 2024 <br /> Lab No. : STK2437331 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (SP 2408364-001) Dup mg/L 0.8% 10 <br /> Bicarbonate 2320B (SP 2408364-001) Dup mg/L 0.8% 10 <br /> Carbonate 2320B (SP 2408364-001) Dup mg/L 0% 10 <br /> E.C. 2320B (SP 2408364-001) Dup umhos/cm 0.4% 5 <br /> Hydroxide 2320B (SP 2408364-001) Dup mg/L 0% 10 <br /> Solids,Total Dissolved 2540CE 05/23/2024:205760CTL Blank mg/L ND <20 <br /> LCS mg/L 992.0 95.4% 90-110 <br /> (VI 2443989-016) Dup mg/L 1.64% 5 <br /> (VI 2443989-016) Dup mg/L 2.04% 5 <br /> Chloride 300.0 05/22/2024:205785LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 96.6% 90-110 <br /> MS mg/L 50.00 79.4% 67-117 <br /> (VI 2443883-002) MSD mg/L 50.00 77.6% 67-117 <br /> MSRPD mg/L 0.9% :57 <br /> MS mg/L 50.00 99.1% 67-117 <br /> (CH 2473961-003) MSD mg/L 50.00 99.3% 67-117 <br /> MSRPD mg/L 0.2% <_7 <br /> Fluoride 300.0 05/22/2024:205785LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 97.6% 90-110 <br /> MS mg/L 5.000 101% 89-111 <br /> (VI 2443883-002) MSD mg/L 5.000 101% 89-111 <br /> MSRPD mg/L 0.2% :59 <br /> MS mg/L 5.000 103% 89-111 <br /> (CH 2473961-003) MSD mg/L 5.000 103% 89-111 <br /> MSRPD mg/L 0.1% :59 <br /> Nitrate 300.0 05/22/2024:205785LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 97.0% 90-110 <br /> MS mg/L 40.00 101% 86-112 <br /> (VI 2443883-002) MSD mg/L 40.00 101% 86-112 <br /> MSRPD mg/L 0.1% :57 <br /> MS mg/L 40.00 102% 86-112 <br /> (CH 2473961-003) MSD mg/L 40.00 103% 86-112 <br /> MSRPD mg/L 0.2% :57 <br /> Nitrate+Nitrite as N 300.0 05/22/2024:205785LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 97.0% 90-110 <br /> MS mg/L 40.00 101% 86-112 <br /> (VI 2443883-002) MSD mg/L 40.00 101% 86-112 <br /> MSRPD mg/L 0.1% :57 <br /> MS mg/L 40.00 102% 86-112 <br /> (CH 2473961-003) MSD mg/L 40.00 103% 86-112 <br /> MSRPD mg/L 0.2% :57 <br /> Nitrate Nitrogen 300.0 05/22/2024:205785LDM Blank mg/L ND <0.1 <br /> LCS mg/L 4.518 96.9% 90-110 <br /> MS mg/L 9.036 101% 86-112 <br /> (VI 2443883-002) MSD mg/L 9.036 100% 86-112 <br /> MSRPD mg/L 0.1% :57 <br /> MS mg/L 9.036 102% 86-112 <br /> (CH 2473961-003) MSD mg/L 9.036 103% 86-112 <br /> MSRPD mg/L 0.2% :57 <br /> Nitrite as Nitrogen 300.0 05/22/2024:205785LDM Blank mg/L ND <0.1 <br /> Page 7 of 8 Page 7 of 8 <br />