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May 6, 2022 Lab ID : STK2235427 <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 Data <br />DQO <br />Note <br />Metals <br />Sodium <br />200.7 <br />04/21/22:205748AC <br />CCB <br />ppm <br />0.05 <br />1 <br />inc <br />200.7 <br />MS <br />ug/L <br />800.0 <br />99.0% <br />75-125 <br />(CC 2281368-004) <br />MSD <br />ug/L <br />800.0 <br />94.9% <br />75-125 <br />MSRPD <br />I ug/L <br />4000 <br />4.2% <br />:520.0 <br />200.7 <br />04/21/22:205748AC <br />CCV <br />ppm <br />1.000 <br />99.9% <br />90-110 <br />CCB <br />ppm <br />-0.0051 <br />0.02 <br />CCV <br />ppm <br />1.000 <br />94.8% <br />90-110 <br />CCB <br />ppm <br />-0.0008 <br />0.02 <br />Wet Chem <br />Alkalinity (as CaCO3) <br />2320B <br />(SP 2206577-015) <br />Dup <br />mg/L <br />0.6% <br />10 <br />2320B <br />05/02/22:206314amm <br />CCV <br />mg/l <br />235.8 <br />100% <br />90-110 <br />CCV <br />mg/1 <br />235.8 <br />99.2% <br />90-110 <br />Bicarbonate <br />2320B <br />(SP 2206577-015) <br />Dup <br />m <br />0.7% <br />10 <br />Carbonate <br />2320B <br />(SP 2206577-015) <br />Dup <br />m <br />10 <br />Hydroxide <br />2320B <br />(SP 2206577-015) <br />Dup <br />m <br />10 <br />Conductivity <br />2510B <br />04/28/22:206050sta <br />ICB <br />umhos/cm <br />0.0700 <br />1 <br />CCV <br />umhos/cm <br />997.0 <br />101% <br />95-105 <br />CCV <br />umhos/cm <br />997.0 <br />101% <br />95-105 <br />E. C. <br />2510B <br />04/28/22:204655sta <br />Blank <br />umhos/cm <br />ND <br /><1 <br />(SP 2205947-002) <br />Dup <br />umhos/cm <br />0.4% <br />5 <br />Total Dissolved Solids (TFR) <br />2540CE <br />04/21/22:204376CTL <br />Blank <br />mg/L <br />ND <br /><20 <br />LCS <br />mg/L <br />990.5 <br />101% <br />90-110 <br />(SP 2206472-006) <br />Dup <br />mg/L <br />0.4% <br />5 <br />SP 2206472-006) <br />Dup <br />mg/L <br />0.4% <br />5 <br />Chloride <br />300.0 <br />04/20/22:204323NJB <br />Blank <br />mg/L <br />ND <br /><I <br />LCS <br />mg/L <br />25.00 <br />98.8% <br />90-110 <br />MS <br />mg/L <br />50.00 <br />95.2% <br />85-121 <br />(STK2235427-001) <br />MSD <br />mg/L <br />50.00 <br />100% <br />85-121 <br />MSRPD <br />I mg/L <br />10.00 <br />4.2% <br /><19 <br />300.0 <br />04/20/22:205721njb <br />CCB <br />mg/1 <br />0.0310 <br />1 <br />CCV <br />mg/1 <br />25.00 <br />96.4% <br />90-110 <br />CCB <br />mg/1 <br />0.0320 <br />l <br />CCV <br />mg/1 <br />25.00 <br />96.3% <br />90-110 <br />Fluoride <br />300.0 <br />04/20/22:204323NJB <br />Blank <br />mg/L <br />ND <br /><0.1 <br />LCS <br />mg/L <br />2.500 <br />100% <br />90-110 <br />MS <br />mg/L <br />5.000 <br />99.4% <br />87-120 <br />(STK2235427-001) <br />MSD <br />mg/L <br />5.000 <br />105% <br />87-120 <br />MSRPD <br />I mg/L <br />10.00 <br />5.0% <br />1 :16 <br />300.0 <br />04/20/22:205721njb <br />CCB <br />mg/1 <br />0.00 <br />0.1 <br />CCV <br />mg/l <br />2.500 <br />97.4% <br />90-110 <br />CCB <br />mg/1 <br />0.00 <br />0.1 <br />CCV <br />mg/l <br />2.500 <br />97.0% <br />90-110 <br />Nitrate <br />300.0 <br />04/20/22:204323NJB <br />Blank <br />mg/L <br />ND <br /><0.4 <br />LCS <br />mg/L <br />20.00 <br />99.8% <br />90-110 <br />MS <br />mg/L <br />40.00 <br />97.9% <br />85-119 <br />(STK2235427-001) <br />MSD <br />mg/L <br />40.00 <br />103% <br />85-119 <br />MSRPD <br />I mg/L <br />10.00 <br />4.3% <br />1 <19 <br />300.0 <br />04/20/22:205721njb <br />CCB <br />mg/1 <br />0.00 <br />0.5 <br />CCV <br />mg/l <br />20.00 <br />97.1% <br />90-110 <br />CCB <br />mg/l <br />0.00 <br />0.5 <br />CCV <br />mg/1 <br />20.00 <br />96.5% <br />90-110 <br />Nitrate + Nitrite as N <br />300.0 <br />04/20/22:204323NJB <br />Blank <br />mg/L <br />ND <br /><0.1 <br />Nitrate Nitrogen <br />300.0 <br />04/20/22:204323NJB <br />Blank <br />mg/L <br />ND <br /><0.1 <br />Nitrite <br />300.0 <br />04/20/22:204323NJB <br />Blank <br />mg/L <br />ND <br /><0.5 <br />Page 7 of 8 <br />