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April 13, 2022 Lab ID : STK2233977 <br />San Joaquin Co. Environmental Health Dep Customer :3-17919 <br />Quality Control - Inorganic <br />Constituent <br />Method <br />Date/ID <br />Type <br />Units <br />Conc. <br />QC Data <br />IIQO <br />Note <br />Metals <br />Sodium <br />200.7 <br />03/25/22:204386AC <br />CCB <br />PPM <br />-0.01 <br />1 <br />inc <br />200.7 <br />MS <br />ug/L <br />800.0 <br />88.8% <br />75-125 <br />(SP 2204722-002) <br />MSD <br />ug/L <br />800.0 <br />104% <br />75-125 <br />MSRPD <br />u <br />4000 <br />15.6% <br />520.0 <br />200.7 <br />03/28/22:204441AC <br />CCV <br />ppm <br />1.000 <br />99.6% <br />90-110 <br />CCB <br />ppm <br />-0.0150 <br />0.02 <br />CCV <br />ppm <br />1.000 <br />97.5% <br />90-110 <br />CCB <br />I PPM <br />-0.0062 <br />1 0.02 <br />Wet Chem <br />Alkalinity (as CaCO3) <br />2320B <br />(STK2233920-001) <br />Dup <br />mg/L <br />2.55% <br />10 <br />2320B <br />04/03/22:204730AMM <br />CCV <br />mg/l <br />235.8 <br />99.4% <br />90-110 <br />CCV <br />mg/l <br />235.8 <br />97.4% <br />90-110 <br />Bicarbonate <br />2320B <br />(STK2233920-001) <br />Dup <br />m <br />2.54% <br />10 <br />Carbonate <br />2320B <br />(STK2233920-001) <br />Dup <br />mg/L <br />10 <br />Hydroxide <br />2320B <br />(STK2233920-001) <br />Dup <br />m <br />10 <br />onductivity <br />2510B <br />03/30/22:204504sta <br />ICB <br />umhos/cm <br />0.170 <br />1 <br />CCV <br />umhos/cm <br />997.0 <br />102% <br />95-105 <br />CCV <br />umhos/cm <br />997.0 <br />101% <br />95-105 <br />E. C. <br />2510B <br />03/30/22:203451sta <br />Blank <br />umhos/cm <br />ND <br /><1 <br />(SP 2204744-001) <br />Dup <br />umhos/cm <br />0.1% <br />5 <br />Total Dissolved Solids (TFR) <br />2540CE <br />03/25/22:203283CTL <br />Blank <br />mg/L <br />ND <br /><20 <br />LCS <br />mg/L <br />990.8 <br />103% <br />90-110 <br />(VI 2242045-001) <br />Dup <br />mg/L <br />2.2% <br />5 <br />(VI 2242045-001) <br />Dup <br />m <br />1.6% <br />5 <br />Chloride <br />300.0 <br />03/24/22:20325ONJB <br />Blank <br />mg/L <br />ND <br /><I <br />LCS <br />mg/L <br />25.00 <br />97.9% <br />90-110 <br />MS <br />mg/L <br />50.00 <br />85.6% <br />85-121 <br />(CH 2271791 -00 1) <br />MSD <br />mg/L <br />50.00 <br />87.1% <br />85-121 <br />MSRPD <br />mg/L <br />10.00 <br />0.9% <br />5519 <br />MS <br />mg/L <br />50.00 <br />85.3% <br />85-121 <br />(CH 2271792-001) <br />MSD <br />mg/L <br />50.00 <br />89.1% <br />85-121 <br />MSRPD <br />m <br />10.00 <br />2.3% <br />:519 <br />300.0 <br />03/24/22:2043 1 6njb <br />CCB <br />mg/l <br />0.0350 <br />1 <br />CCV <br />mg/l <br />25.00 <br />98.1% <br />90-110 <br />CCB <br />mg/l <br />0.0360 <br />1 <br />CCV <br />m <br />25.00 <br />98.1% <br />1 90-110 <br />Fluoride <br />300.0 <br />03/24/22:20325ONJB <br />Blank <br />mg/L <br />ND <br /><0.1 <br />LCS <br />mg/L <br />2.500 <br />99.7% <br />90-110 <br />MS <br />mg/L <br />5.000 <br />95.2% <br />87-120 <br />(CH 2271791 -00 1) <br />MSD <br />mg/L <br />5.000 <br />96.7% <br />87-120 <br />MSRPD <br />mg/L <br />10.00 <br />1.4% <br /><16 <br />MS <br />mg/L <br />5.000 <br />94.9% <br />87-120 <br />(CH 227t792-001) <br />MSD <br />mg/L <br />5.000 <br />99.0% <br />87-120 <br />MSRPD <br />m <br />10.00 <br />3.8% <br /><_16 <br />300.0 <br />03/24/22:204316njb <br />CCB <br />mg/l <br />0.00 <br />0.1 <br />CCV <br />mg/l <br />2.500 <br />99.2% <br />90-110 <br />CCB <br />mg/l <br />0.00 <br />0.1 <br />CCV <br />mg/1 <br />2.500 <br />99.3% <br />90-110 <br />Nitrate <br />300.0 <br />03/24/22:20325ONJB <br />Blank <br />mg/L <br />ND <br /><0.4 <br />LCS <br />mg/L <br />20.00 <br />98.6% <br />90-110 <br />MS <br />mg/L <br />40.00 <br />96.0% <br />85-119 <br />(CH 2271791-001) <br />MSD <br />mg/L <br />40.00 <br />97.6% <br />85-119 <br />MSRPD <br />mg/L <br />10.00 <br />1.7% <br />:519 <br />MS <br />I mg/L <br />1 40.00 <br />1 95.8% <br />1 85-119 <br />Page 7 of 9 <br />