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May 6, 2024 <br /> Lab No. : STK2435795 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (SP 2406431-013) Dup mg/L 0.2% 10 <br /> Bicarbonate 2320B (SP 2406431-013) Dup mg/L 0.2% 10 <br /> Carbonate 2320B (SP 2406431-013) Dup mg/L 0% 10 <br /> E.C. 2320B (SP 2406431-013) Dup umhos/cm 0.1% 5 <br /> Hydroxide 2320B (SP 2406431-013) Dup mg/L 0% 10 <br /> Solids,Total Dissolved 2540CE 04/29/2024:204747CTL Blank mg/L ND <20 <br /> LCS mg/L 992.0 102% 90-110 <br /> (STK2435562-009) Dup mg/L 0.7% 5 <br /> (STK2435562-009) Dup mg/L 2.48% 5 <br /> Chloride 300.0 04/26/2024:204656LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 100% 90-110 <br /> MS mg/L 50.00 96.8% 67-117 <br /> (STK2435795-001) MSD mg/L 50.00 96.7% 67-117 <br /> MSRPD mg/L 0.1% <_7 <br /> MS mg/L 50.00 100% 67-117 <br /> (STK2435794-001) MSD mg/L 50.00 99.8% 67-117 <br /> MSRPD mg/L 0.5% :57 <br /> Fluoride 300.0 04/26/2024:204656LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 98.9% 90-110 <br /> MS mg/L 5.000 99.8% 89-111 <br /> (STK2435795-001) MSD mg/L 5.000 101% 89-111 <br /> MSRPD mg/L 0.8% :59 <br /> MS mg/L 5.000 102% 89-111 <br /> (STK2435794-001) MSD mg/L 5.000 103% 89-111 <br /> MSRPD mg/L 0.6% :59 <br /> Nitrate 300.0 04/26/2024:204656LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.2% 90-110 <br /> MS mg/L 40.00 96.3% 86-112 <br /> (STK2435795-001) MSD mg/L 40.00 96.2% 86-112 <br /> MSRPD mg/L 0.1% 157 <br /> MS mg/L 40.00 89.2% 86-112 <br /> (STK2435794-001) MSD mg/L 40.00 90.0% 86-112 <br /> MSRPD mg/L 0.5% <_7 <br /> Nitrate+Nitrite as N 300.0 04/26/2024:204656LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 99.2% 90-110 <br /> MS mg/L 40.00 96.3% 86-112 <br /> (STK2435795-001) MSD mg/L 40.00 96.2% 86-112 <br /> MSRPD mg/L 0.1% 157 <br /> MS mg/L 40.00 89.2% 86-112 <br /> (STK2435794-001) MSD mg/L 40.00 90.0% 86-112 <br /> MSRPD mg/L 0.5% :57 <br /> Nitrate Nitrogen 300.0 04/26/2024:204656LDM Blank mg/L ND <0.1 <br /> LCS mg/L 4.518 99.2% 90-110 <br /> MS mg/L 9.036 96.2% 86-112 <br /> (STK2435795-001) MSD mg/L 9.036 96.1% 86-112 <br /> MSRPD mg/L 0.1% :57 <br /> MS mg/L 9.036 89.2% 86-112 <br /> (STK2435794-001) MSD mg/L 9.036 90.0% 86-112 <br /> MSRPD mg/L 0.5% 157 <br /> Nitrite as Nitrogen 300.0 04/26/2024:204656LDM Blank mg/L ND <0.1 <br /> Page 6 of 7 Page 6 of 7 <br />