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May 31, 2024 <br /> Lab No. : STK2436248 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (CH 2473225-003) Dup mg/L 5.03% 10 <br /> Bicarbonate 2320B (CH 2473225-003) Dup mg/L 4.75% 10 <br /> Carbonate 2320B (CH 2473225-003) Dup mg/L 0% 10 <br /> E.C. 2320B (CH 2473225-003) Dup umhos/cm 1.46% 5 <br /> Hydroxide 2320B (CH 2473225-003) Dup mg/L 0% 10 <br /> Solids,Total Dissolved 2540CE 05/07/2024:205107CTL Blank mg/L ND <20 <br /> LCS mg/L 992.0 97.3% 90-110 <br /> (SP 2406968-001) Dup mg/L 1.17% 5 <br /> (SP 2406968-001) Dup mg/L 0.4% 5 <br /> Chloride 300.0 05/29/2024:205997LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 98.0% 90-110 <br /> MS mg/L 50.00 94.8% 67-117 <br /> (SP 2408394-003) MSD mg/L 50.00 94.8% 67-117 <br /> MSRPD mg/L 0.0% :57 <br /> MS mg/L 50.00 97.5% 67-117 <br /> (SP 2408394-001) MSD mg/L 50.00 97.6% 67-117 <br /> MSRPD mg/L 0.0% :_7 <br /> Fluoride 300.0 05/29/2024:205997LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 99.7% 90-110 <br /> MS mg/L 5.000 96.6% 89-111 <br /> (SP 2408394-003) MSD mg/L 5.000 96.6% 89-111 <br /> MSRPD mg/L 0.0% :59 <br /> MS mg/L 5.000 98.6% 89-111 <br /> (SP 2408394-001) MSD mg/L 5.000 98.8% 89-111 <br /> MSRPD mg/L 0.2% :59 <br /> Sulfate 300.0 05/29/2024:205997LDM Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 98.4% 90-110 <br /> MS mg/L 100.0 66.3% 18-165 <br /> (SP 2408394-003) MSD mg/L 100.0 77.7% 18-165 <br /> MSRPD mg/L 4.3% :_7 <br /> MS mg/L 100.0 64.3% 18-165 <br /> (SP 2408394-001) MSD mg/L 100.0 63.8% 18-165 <br /> MSRPD mg/L 0.2% :57 <br /> Nitrite as Nitrogen 4500NO2B 05/04/2024:205108AMM MS mg/L 0.2284 98.2% 1-173 <br /> (STK2436221-001) MSD mg/L 0.2284 95.2% 1-173 <br /> MSRPD mg/L 3.1% :520 <br /> Nitrate 4500NO3F 05/07/2024:205083ILP Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 99.8% 80-120 <br /> MS mg/L 5.609 100% 66-125 <br /> (SP 2407002-001) MSD mg/L 5.609 100% 66-125 <br /> MSRPD mg/L 0.1% :_30.4 <br /> Nitrate+Nitrite as N 4500NO3F 05/07/2024:205083ILP Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 99.8% 80-120 <br /> MS mg/L 5.609 100% 66-125 <br /> (SP 2407002-001) MSD mg/L 5.609 100% 66-125 <br /> MSRPD mg/L 0.1% :530.4 <br /> Nitrate Nitrogen 4500NO3F 05/07/2024:205083ILP Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 99.8% 80-120 <br /> MS mg/L 5.609 100% 66-125 <br /> (SP 2407002-001) MSD mg/L 5.609 100% 66-125 <br /> Page 7 of 8 Page 7 of 8 <br />