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April 1, 2022 Lab ID : STK2233763 <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 />Cone. <br />QC Dara <br />UQO <br />Note <br />Metals <br />Sodium <br />200.7 <br />03/22/22:204154AC <br />CCB <br />ppm <br />0.02 <br />1 <br />inc <br />200.7 <br />MS <br />ug/L <br />800.0 <br />98.6% <br />75-125 <br />(CH 2271800-001) <br />MSD <br />ug/L <br />800.0 <br />88.7% <br />75-125 <br />MSRPD <br />ug/L <br />4000 <br />10.4% <br /><20.0 <br />200.7 <br />03/22/22:204154AC <br />CCV <br />ppm <br />1.000 <br />95.0% <br />90-110 <br />CCB <br />ppm <br />0.0003 <br />0.02 <br />CCV <br />ppm <br />1.000 <br />103% <br />90-110 <br />CCB <br />ppm <br />0.0006 <br />0.02 <br />Wet Chem <br />Alkalinity (as CaCO3) <br />2320B <br />(CH 2271800-002) <br />Dup <br />mg/L <br />1.17% <br />10 <br />2320B <br />03/29/22:204459AMM <br />CCV <br />mg/L <br />235.8 <br />98.6% <br />90-110 <br />CCV <br />m /L <br />235.8 <br />98.2% <br />90-110 <br />Bicarbonate <br />2320B <br />(CH 2271800-002) <br />Dup <br />m /L <br />1.16% <br />10 <br />Carbonate <br />2320B <br />(CH 2271800-002) <br />Dup <br />mg/L <br />10 <br />Hydroxide <br />2320B <br />(CH 2271800-002) <br />Dup <br />m <br />10 <br />Conductivity <br />2510B <br />03/28/22:204377sta <br />ICB <br />umhos/cm <br />0.0700 <br />1 <br />ICV <br />umhos/cm <br />997.0 <br />99.2% <br />95-105 <br />CCV <br />umhos/cm <br />997.0 <br />98.6% <br />95-105 <br />E. C. <br />2510B <br />03/28/22:203357sta <br />Blank <br />umhos/cm <br />ND <br /><1 <br />(CC 2280923-003) <br />Dup <br />umhos/cm <br />0.2% <br />5 <br />Total Dissolved Solids (TFR) <br />2540CE <br />03/22/22:203128CTL <br />Blank <br />mg/L <br />ND <br /><20 <br />LCS <br />ntg/L <br />990.8 <br />100% <br />90-110 <br />(VI 2241852-001) <br />Dup <br />mg/L <br />1.8% <br />5 <br />(VI 2241852-001) <br />Dup <br />I nig/L <br />3.6% <br />5 <br />Chloride <br />300.0 <br />03/18/22:203016NJB <br />Blank <br />mg/L <br />ND <br /><1 <br />LCS <br />mg/L <br />25.00 <br />98.1% <br />90-110 <br />MS <br />mg/L <br />50.00 <br />92.1% <br />85-121 <br />(SP 2204175-001) <br />MSD <br />mg/L <br />50.00 <br />99.3% <br />85-121 <br />MSRPD <br />mg/L <br />10.00 <br />7.1% <br />:519 <br />MS <br />mg/L <br />50.00 <br />94.1% <br />85-121 <br />(SP 2204175-002) <br />MSD <br />mg/L <br />50.00 <br />97.2% <br />85-121 <br />MSRPD <br />I m <br />10.00 <br />3.3% <br />1 <19 <br />300.0 <br />03/18/22:204020njb <br />CCB <br />mg/l <br />0.0500 <br />l <br />CCV <br />mg/l <br />25.00 <br />103% <br />90-110 <br />CCB <br />mg/l <br />0.0350 <br />l <br />CCV <br />mg/l <br />25.00 <br />103% <br />90-110 <br />Fluoride <br />300.0 <br />03/18/22:203016NJB <br />Blank <br />mg/L <br />ND <br /><0.1 <br />LCS <br />mg/L <br />2.500 <br />99.8% <br />90-110 <br />MS <br />mg/L <br />5.000 <br />93.5% <br />87-120 <br />(SP 2204175-001) <br />MSD <br />mg/L <br />5.000 <br />101% <br />87-120 <br />MSRPD <br />mg/L <br />10.00 <br />7.4% <br />:516 <br />MS <br />mg/L <br />5.000 <br />95.5% <br />87-120 <br />(SP 2204175-002) <br />MSD <br />mg/L <br />5.000 <br />98.7% <br />87-120 <br />MSRPD <br />m <br />10.00 <br />3.3% <br /><16 <br />300.0 <br />03/18/22:204020njb <br />CCB <br />mg/l <br />0.00 <br />CCV <br />mg/1 <br />2.500 <br />104% <br />900.1 <br />-110 <br />CCB <br />mg/1 <br />0.00 <br />0.1 <br />CCV <br />mg/l <br />2.500 <br />105% <br />90-110 <br />Nitrate <br />300.0 <br />03/18/22:203016NJB <br />Blank <br />mg/L <br />ND <br /><0.4 <br />LCS <br />nig/L <br />20.00 <br />99.1% <br />90-110 <br />MS <br />ntg/L. <br />40.00 <br />93.4% <br />85-119 <br />(SP 2204175-001) <br />MSD <br />mg/L <br />40.00 <br />101% <br />85-119 <br />MSRPD <br />mg/L <br />10.00 <br />7.5% <br /><19 <br />MS <br />Im /L <br />1 40.00 <br />95.4% <br />85-119 <br />Page 8 of 10 <br />