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February 23, 2024 <br /> Lab No. : STK2431851 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B (STK2431824-002) Dup mg/L 0.1% 10 <br /> Bicarbonate 2320B (STK2431824-002) Dup mg/L 0.2% 10 <br /> E.C. 2320B (STK2431824-002) Dup umhos/cm 0% 5 <br /> Solids,Total Dissolved 2540CE 02/08/2024:201513CTL Blank mg/L ND <20 <br /> LCS mg/L 992.0 98.5% 90-110 <br /> (STK2431756-002) Dup mg/L 1% 5 <br /> (STK2431756-002) Dup mg/L 1.59% 5 <br /> Chloride 300.0 02/07/2024:201566LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 97.7% 90-110 <br /> MS mg/L 50.00 97.8% 67-117 <br /> (STK2431798-001) MSD mg/L 50.00 97.8% 67-117 <br /> MSRPD mg/L 0.0% <_7 <br /> MS mg/L 50.00 99.3% 67-117 <br /> (STK2431798-002) MSD mg/L 50.00 99.6% 67-117 <br /> MSRPD mg/L 0.3% :57 <br /> Fluoride 300.0 02/07/2024:201566LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 97.8% 90-110 <br /> MS mg/L 5.000 102% 89-111 <br /> (STK2431798-001) MSD mg/L 5.000 102% 89-111 <br /> MSRPD mg/L 0.1% :59 <br /> MS mg/L 5.000 101% 89-111 <br /> (STK2431798-002) MSD mg/L 5.000 102% 89-111 <br /> MSRPD mg/L 0.4% :59 <br /> Nitrate 300.0 02/07/2024:201566LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.6% 90-110 <br /> MS mg/L 40.00 103% 86-112 <br /> (STK2431798-001) MSD mg/L 40.00 102% 86-112 <br /> MSRPD mg/L 0.1% :57 <br /> MS mg/L 40.00 101% 86-112 <br /> (STK2431798-002) MSD mg/L 40.00 102% 86-112 <br /> MSRPD mg/L 0.2% <_7 <br /> Nitrate+Nitrite as N 300.0 02/07/2024:201566LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.6% 90-110 <br /> MS mg/L 40.00 103% 86-112 <br /> (STK2431798-001) MSD mg/L 40.00 102% 86-112 <br /> MSRPD mg/L 0.1% :57 <br /> MS mg/L 40.00 101% 86-112 <br /> (STK2431798-002) MSD mg/L 40.00 102% 86-112 <br /> MSRPD mg/L 0.2% <_7 <br /> Nitrate Nitrogen 300.0 02/07/2024:201566LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.6% 90-110 <br /> MS mg/L 40.00 103% 86-112 <br /> (STK2431798-001) MSD mg/L 40.00 102% 86-112 <br /> MSRPD mg/L 0.1% :57 <br /> MS mg/L 40.00 101% 86-112 <br /> (STK2431798-002) MSD mg/L 40.00 102% 86-112 <br /> MSRPD mg/L 0.2% :57 <br /> Nitrite as Nitrogen 300.0 02/07/2024:201566LDM Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 98.6% 90-110 <br /> MS mg/L 30.00 102% 88-111 <br /> Page 6 of 7 Page 6 of 7 <br />