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September 29, 2022 <br /> Lab No. : STK2253004 <br /> San Joaquin County EHD <br /> Customer No. : 3017919 <br /> Quality Control -Wet Chem <br /> Wet Chem <br /> Alkalinity(as CaCO3) 2320B 09/25/2022:210890AMM ND mg/L 0.6% 10 <br /> Bicarbonate 2320B (STK2252465-005) Dup mg/L 0.7% 10 <br /> E.C. 2320B (CH 2277967-001) Dup umhos/cm 0% 5 <br /> pH 2320B (STK2252465-005) Dup units 0.1% 4.80 <br /> Solids,Total Dissolved 2540CE 09/15/2022:210540CTL Blank mg/L ND <20 <br /> LCS mg/L 990.8 99.5% 90-110 <br /> (STK2252961-001) Dup mg/L 2.2% 5 <br /> (STK2252961-001) Dup mg/L 0.1% 5 <br /> Chloride 300.0 09/14/2022:210537LDM Blank mg/L ND <1 <br /> LCS mg/L 25.00 98.7% 90-110 <br /> MS mg/L 50.00 83.4% 85-121 435 <br /> (STK2252257-005) MSD mg/L 50.00 96.9% 85-121 <br /> MSRPD mg/L 10.00 10.3% :519 <br /> MS mg/L 50.00 59.0% 85-121 435 <br /> (STK2252100-010) MSD mg/L 50.00 62.1 % 85-121 435 <br /> MSRPD mg/L 10.00 1.4% :519 <br /> Fluoride 300.0 09/14/2022:210537LDM Blank mg/L ND <0.1 <br /> LCS mg/L 2.500 99.2% 90-110 <br /> MS mg/L 5.000 90.1 % 87-120 <br /> (STK2252257-005) MSD mg/L 5.000 105% 87-120 <br /> MSRPD mg/L 10.00 14.5% :516 <br /> MS mg/L 5.000 95.8% 87-120 <br /> (STK2252100-010) MSD mg/L 5.000 98.0% 87-120 <br /> MSRPD mg/L 10.00 2.1% :516 <br /> Nitrate 300.0 09/14/2022:210537LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.7% 90-110 <br /> MS mg/L 40.00 72.5% 85-119 435 <br /> (STK2252257-005) MSD mg/L 40.00 83.9% 85-119 435 <br /> MSRPD mg/L 10.00 6.0% :519 <br /> MS mg/L 40.00 94.4% 85-119 <br /> (STK2252100-010) MSD mg/L 40.00 96.7% 85-119 <br /> MSRPD mg/L 10.00 2.3% :519 <br /> Nitrate+Nitrite as N 300.0 09/14/2022:210537LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.7% 90-110 <br /> MS mg/L 40.00 72.5% 85-119 435 <br /> (STK2252257-005) MSD mg/L 40.00 83.9% 85-119 435 <br /> MSRPD mg/L 10.00 6.0% :519 <br /> MS mg/L 40.00 94.4% 85-119 <br /> (STK2252100-010) MSD mg/L 40.00 96.7% 85-119 <br /> MSRPD mg/L 10.00 2.3% :519 <br /> Nitrate Nitrogen 300.0 09/14/2022:210537LDM Blank mg/L ND <0.4 <br /> LCS mg/L 20.00 98.7% 90-110 <br /> MS mg/L 40.00 72.5% 85-119 435 <br /> (STK2252257-005) MSD mg/L 40.00 83.9% 85-119 435 <br /> MSRPD mg/L 10.00 6.0% 5519 <br /> MS mg/L 40.00 94.4% 85-119 <br /> (STK2252100-010) MSD mg/L 40.00 96.7% 85-119 <br /> MSRPD mg/L 10.00 2.3% :519 <br /> Nitrite as Nitrogen 300.0 09/14/2022:210537LDM Blank mg/L ND <0.4 <br /> LCS mg/L 15.00 99.5% 90-110 <br /> Page 7 of 8 Page 7 of 8 <br />