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September 6, 2024 <br /> Lab No. : STK2452291 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (SP 2413428-001) Dup mg/L 0.2% 10 <br /> Bicarbonate 2320B (SP 2413428-001) Dup mg/L 0.2% 10 <br /> Carbonate 2320B (SP 2413428-001) Dup mg/L 0% 10 <br /> E.C. 2320B (SP 2413428-001) Dup umhos/cm 0.4% 5 <br /> Hydroxide 2320B (SP 2413428-001) Dup mg/L 0% 10 <br /> Solids,Total Dissolved 2540CE 08/21/2024:209401CTL Blank mg/L ND <20 <br /> LCS mg/L 991.1 103% 90-110 <br /> (STK2452296-001) Dup mg/L 1.05% 5 <br /> (STK2452296-001) Dup mg/L 4.57% 5 <br /> Chloride 300.0 08/23/2024:209588LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 103% 90-110 <br /> MS mg/L 50.00 103% 67-117 <br /> (CH 2477083-001) MSD mg/L 50.00 103% 67-117 <br /> MSRPD mg/L 0.0% :57 <br /> MS mg/L 50.00 94.4% 67-117 <br /> (CC 2483076-001) MSD mg/L 50.00 93.8% 67-117 <br /> MSRPD mg/L 0.4% !_7 <br /> Fluoride 300.0 08/23/2024:209588LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 102% 90-110 <br /> MS mg/L 5.000 103% 89-111 <br /> (CH 2477083-001) MSD mg/L 5.000 104% 89-111 <br /> MSRPD mg/L 0.8% :59 <br /> MS mg/L 5.000 106% 89-111 <br /> (CC 2483076-001) MSD mg/L 5.000 105% 89-111 <br /> MSRPD mg/L 0.7% :59 <br /> Sulfate 300.0 08/23/2024:209588LDM Blank mg/L ND <0.5 <br /> LCS mg/L 50.00 103% 90-110 <br /> MS mg/L 100.0 103% 18-165 <br /> (CH 2477083-001) MSD mg/L 100.0 103% 18-165 <br /> MSRPD mg/L 0.1% :57 <br /> MS mg/L 100.0 102% 18-165 <br /> (CC 2483076-001) MSD mg/L 100.0 102% 18-165 <br /> MSRPD mg/L 0.4% :57 <br /> Nitrate 4500NO3F 08/20/2024:209368ILP Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 99.8% 80-120 <br /> MS mg/L 5.609 97.2% 66-125 <br /> (CH 2476891-001) MSD mg/L 5.609 97.3% 66-125 <br /> MSRPD mg/L 0.1% :530.4 <br /> Nitrate+Nitrite as N 4500NO3F 08/20/2024:209368ILP Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 99.8% 80-120 <br /> MS mg/L 5.609 97.2% 66-125 <br /> (CH 2476891-001) MSD mg/L 5.609 97.3% 66-125 <br /> MSRPD mg/L 0.1% :530.4 <br /> Nitrate Nitrogen 4500NO3F 08/20/2024:209368ILP Blank mg/L ND <0.4 <br /> LCS mg/L 11.22 99.8% 80-120 <br /> MS mg/L 5.609 97.2% 66-125 <br /> (CH 2476891-001) MSD mg/L 5.609 97.3% 66-125 <br /> MSRPD mg/L 0.1% 1530.4 <br /> Nitrite as Nitrogen 4500NO3F 08/20/2024:209376ILP Blank mg/L ND <0.2 <br /> LCS mg/L 1.218 103% 80-120 <br /> Page 6 of 7 Page 6 of 7 <br />