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April 20, 2022 Lab ID : STK2234451 <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 />DQO <br />Note <br />Metals <br />Sodium <br />200.7 <br />04/06/22:204905AC <br />CCB <br />PPM <br />0.02 <br />1 <br />inc <br />200.7 <br />MS <br />ug/L <br />800.0 <br />102% <br />75-125 <br />(STK2234451 -00 1) <br />MSD <br />ug/L <br />800.0 <br />96.2% <br />75-125 <br />MSRPD <br />ug/L <br />4000 <br />5.7% <br /><20.0 <br />200.7 <br />04/06/22:204905AC <br />CCV <br />ppm <br />1.000 <br />104% <br />90-110 <br />CCB <br />ppm <br />0.0004 <br />0.02 <br />CCV <br />ppm <br />1.000 <br />96.7% <br />90-110 <br />CCB <br />PPM <br />-0.0004 <br />0.02 <br />Wet Chem <br />Alkalinity (as CaCO3) <br />2320B <br />(STK2234434-001) <br />Dup <br />mg/L <br />1.79% <br />10 <br />2320B <br />04/13/22:205298AMM <br />CCV <br />mg/l <br />235.8 <br />99.4% <br />90-110 <br />CCV <br />mg/l <br />235.8 <br />99.5% <br />90-110 <br />Bicarbonate <br />2320B <br />(STK2234434-001) <br />Dup <br />mg/L <br />1.76% <br />10 <br />Carbonate <br />2320B <br />(STK2234434-001) <br />Dup <br />mg/L <br />10 <br />Hydroxide <br />23208 <br />STK2234434-001) <br />Du <br />m <br />10 <br />Conductivity <br />2510B <br />04/12/22:205153sta <br />ICB <br />umhos/cm <br />0.0700 <br />1 <br />CCV <br />umhos/cm <br />997.0 <br />99.4% <br />95-105 <br />CCV <br />umbos/cm <br />997.0 <br />99.2% <br />95-105 <br />E. C. <br />2510E <br />04/12/22:203968sta <br />Blank <br />umbos/cm <br />ND <br /><1 <br />(SP 2205501-001) <br />Dup <br />umhos/cm <br />0.090/0 <br />5 <br />Total Dissolved Solids (TFR) <br />2540CE <br />04/06/22:203749CTL <br />Blank <br />mg/L <br />ND <br /><20 <br />LCS <br />mg/L <br />990.8 <br />103% <br />90-110 <br />(CC 2280884-001) <br />Dup <br />mg/L <br />0.3% <br />5 <br />(CC 2280884-001) <br />Dup <br />mg/L <br />0.5% <br />5 <br />Chloride <br />300.0 <br />04/05/22:203675NJB <br />Blank <br />mg/L <br />ND <br /><1 <br />LCS <br />mg/L <br />25.00 <br />97.1% <br />90-110 <br />MS <br />mg/L <br />50.00 <br />89.6% <br />85-121 <br />(STK2234059-001) <br />MSD <br />mg/L <br />50.00 <br />95.7% <br />85-121 <br />MSRPD <br />mg/L <br />10.00 <br />4.7% <br /><19 <br />MS <br />mg/L <br />50.00 <br />89.7% <br />85-121 <br />(STK2234059-002) <br />MSD <br />mg/L <br />50.00 <br />95.3% <br />85-121 <br />MSRPD <br />I m <br />10.00 <br />4.5% <br /><_19 <br />300.0 <br />04/05/22:204911njb <br />CCB <br />mg/l <br />0.0960 <br />l <br />CCV <br />mg/l <br />25.00 <br />101% <br />90-110 <br />CCB <br />mg/l <br />0.108 <br />1 <br />CCV <br />mg/l <br />25.00 <br />101% <br />90-110 <br />Fluoride <br />300.0 <br />04/05/22:203675NJB <br />Blank <br />mg/L <br />ND <br /><0.1 <br />LCS <br />mg/L <br />2.500 <br />97.2% <br />90-110 <br />MS <br />mg/L <br />5.000 <br />94.5% <br />87-120 <br />(STK2234059-001) <br />MSD <br />mg/L <br />5.000 <br />100% <br />87-120 <br />MSRPD <br />mg/L <br />10.00 <br />5.7% <br />:516 <br />MS <br />mg/L <br />5.000 <br />94.3% <br />87-120 <br />(STK2234059-002) <br />MSD <br />mg/L <br />5.000 <br />99.9% <br />87-120 <br />MSRPD <br />I m <br />10.00 <br />5.4% <br /><16 <br />300.0 <br />04/05/22:204911njb <br />CCB <br />mg/l <br />0.00 <br />0.1 <br />CCV <br />mg/l <br />2.500 <br />99.5% <br />90-110 <br />CCB <br />mg/l <br />0.00 <br />0.1 <br />CCV <br />mg/l <br />2.500 <br />99.5% <br />90-110 <br />Nitrate <br />300.0 <br />04/05/22:203675NJB <br />Blank <br />mg/L <br />ND <br /><0.4 <br />LCS <br />mg/L <br />20.00 <br />96.1% <br />90-110 <br />MS <br />mg/L <br />40.00 <br />94.1% <br />85-119 <br />(STK2234059-001) <br />MSD <br />mg/L <br />40.00 <br />100% <br />85-119 <br />MSRPD <br />mg/L. <br />10.00 <br />5.7% <br />:519 <br />MS <br />I m <br />40.00 <br />1 91.1% <br />1 85-119 <br />Page 7 of 9 <br />