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May 7, 2024 <br /> Lab No. : STK2435983 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (VI 2443396-001) Dup mg/L 0.9% 10 <br /> Bicarbonate 2320B (VI 2443396-001) Dup mg/L 1.19% 10 <br /> Carbonate 2320B (VI 2443396-001) Dup mg/L 0% 10 <br /> E.C. 2320B (VI 2443396-001) Dup umhos/cm 0% 5 <br /> Hydroxide 2320B (VI 2443396-001) Dup mg/L 0% 10 <br /> Solids,Total Dissolved 2540CE 05/02/2024:204866CTL Blank mg/L ND <20 <br /> LCS mg/L 992.0 97.5% 90-110 <br /> (VI 2443414-001) Dup mg/L 0.7% 5 <br /> (VI 2443414-001) Dup mg/L 0.5% 5 <br /> Chloride 300.0 05/01/2024:205015LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 98.2% 90-110 <br /> MS mg/L 50.00 98.6% 67-117 <br /> (STK2435970-001) MSD mg/L 50.00 98.8% 67-117 <br /> MSRPD mg/L 0.2% <_7 <br /> MS mg/L 50.00 71.8% 67-117 <br /> (SP 2406638-002) MSD mg/L 50.00 71.1% 67-117 <br /> MSRPD mg/L 0.3% :57 <br /> Fluoride 300.0 05/01/2024:205015LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 100% 90-110 <br /> MS mg/L 5.000 103% 89-111 <br /> (STK2435970-001) MSD mg/L 5.000 103% 89-111 <br /> MSRPD mg/L 0.1% :59 <br /> MS mg/L 5.000 99.2% 89-111 <br /> (SP 2406638-002) MSD mg/L 5.000 99.5% 89-111 <br /> MSRPD mg/L 0.3% :59 <br /> Nitrate 300.0 05/01/2024:205015LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.8% 90-110 <br /> MS mg/L 40.00 79.3% 86-112 435 <br /> (STK2435970-001) MSD mg/L 40.00 81.1% 86-112 435 <br /> MSRPD mg/L 0.8% 157 <br /> MS mg/L 40.00 89.3% 86-112 <br /> (SP 2406638-002) MSD mg/L 40.00 89.6% 86-112 <br /> MSRPD mg/L 0.2% <_7 <br /> Nitrate+Nitrite as N 300.0 05/01/2024:205015LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.8% 90-110 <br /> MS mg/L 40.00 79.3% 86-112 435 <br /> (STK2435970-001) MSD mg/L 40.00 81.1% 86-112 435 <br /> MSRPD mg/L 0.8% 157 <br /> MS mg/L 40.00 89.3% 86-112 <br /> (SP 2406638-002) MSD mg/L 40.00 89.6% 86-112 <br /> MSRPD mg/L 0.2% :57 <br /> Nitrate Nitrogen 300.0 05/01/2024:205015LDM Blank mg/L ND <0.1 <br /> LCS mg/L 4.518 99.8% 90-110 <br /> MS mg/L 9.036 79.3% 86-112 435 <br /> (STK2435970-001) MSD mg/L 9.036 81.0% 86-112 435 <br /> MSRPD mg/L 0.8% :57 <br /> MS mg/L 9.036 89.3% 86-112 <br /> (SP 2406638-002) MSD mg/L 9.036 89.6% 86-112 <br /> MSRPD mg/L 0.2% 157 <br /> Nitrite as Nitrogen 300.0 05/01/2024:205015LDM Blank mg/L ND <0.1 <br /> Page 7 of 8 Page 7 of 8 <br />