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June 23, 2021 Lab ID : STK2137082 <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 />05/24/21:207767AC <br />CCB <br />PPM <br />0.23 <br />1 <br />inc <br />200.7 <br />MS <br />ug/L <br />800.0 <br />99.3% <br />75-125 <br />(STK2137140-002) <br />MSD <br />ug/L <br />800.0 <br />88.0% <br />75-125 <br />MSRPD <br />u <br />4000 <br />12.0% <br />:520.0 <br />200.7 <br />05/24/21:207767AC <br />CCV <br />ppm <br />1.000 <br />93.0% <br />90-110 <br />CCB <br />ppm <br />-0.0005 <br />0.02 <br />CCV <br />ppm <br />1.000 <br />95.5% <br />90-110 <br />CCB <br />I ppm <br />-0.0004 <br />0.02 <br />Wet Chem <br />Alkalinity (as CaCO3) <br />2320B <br />VI 2143710-001 <br />Dup <br />m <br />0.07% <br />10 <br />2320B <br />05/28/21:208034AMM <br />CCV <br />mg/L <br />235.8 <br />96.0% <br />90-110 <br />CCV <br />m <br />235.8 <br />97.8% <br />90-110 <br />Bicarbonate <br />2320B <br />VI 2143710-001 <br />Dup <br />m <br />0.1% <br />10 <br />Carbonate <br />2320B <br />(VI 2143710-001) <br />Dup <br />m <br />0.0 <br />10 <br />Hydroxide <br />2320B <br />(VI 2143710-001) <br />Dup <br />m <br />0.0 <br />10 <br />Conductivity <br />2510B <br />05/28/21:208005sta <br />ICB <br />umhos/cm <br />0.11 <br />1 <br />CCV <br />umhos/cm <br />1000 <br />103% <br />95-105 <br />CCV <br />umhos/cm <br />1000 <br />102% <br />95-105 <br />E. C. <br />2510B <br />05/28/21:205946sta <br />Blank <br />umhos/cm <br />ND <br /><1 <br />CH 2173468-002 <br />Dup <br />umhos/cm <br />0.2% <br />1 5 <br />Total Dissolved Solids (TFR) <br />2540CE <br />05/21/21:205653CTL <br />Blank <br />mg/L <br />ND <br /><20 <br />LCS <br />mg/L <br />995.0 <br />96.6% <br />90-110 <br />(STK2136998-002) <br />Dup <br />mg/L <br />1.3% <br />5 <br />(STK2136998-002) <br />Dup <br />m <br />1.8% <br />5 <br />Chloride <br />300.0 <br />06/09/21:206443MCA <br />Blank <br />mg/L <br />ND <br /><1 <br />LCS <br />mg/L <br />25.00 <br />102% <br />90-110 <br />MS <br />mg/L <br />50.00 <br />96.5% <br />85-121 <br />(CH 2173960-001) <br />MSD <br />mg/L <br />50.00 <br />97.1% <br />85-121 <br />MSRPD <br />m <br />10.00 <br />0.4% <br /><19 <br />300.0 <br />06/10/21:208775MCA <br />CCB_ <br />mg/L <br />0.08 <br />1 <br />CCV <br />mg/L <br />25.00 <br />98.2% <br />90-110 <br />CCB <br />mg/L <br />0.08 <br />1 <br />CCV <br />m <br />25.00 <br />98.2% <br />90-110 <br />PluoridC <br />300.0 <br />06/09/21:206443MCA <br />Blank <br />mg/L <br />ND <br /><0.1 <br />LCS <br />mg/L <br />2.500 <br />102% <br />90-110 <br />MS <br />mg/L <br />5.000 <br />104% <br />87-120 <br />(CH 2173960-001) <br />MSD <br />mg/L <br />5.000 <br />104% <br />87-120 <br />MSRPD <br />m <br />10.00 <br />0.2% <br /><16 <br />300.0 <br />06/10/21:208775MCA <br />CCB <br />mg/L <br />0.000 <br />0.1 <br />CCV <br />mg/L <br />2.500 <br />98.4% <br />90-110 <br />CCB <br />mg/L <br />0.000 <br />0.1 <br />CCV <br />m <br />2.500 <br />98.3% <br />90-110 <br />Sulfate <br />,00.0 <br />06/09/21:206443MCA <br />Blank <br />mg/L <br />ND <br /><0.5 <br />LCS <br />mg/L <br />50.00 <br />102% <br />90-110 <br />MS <br />mg/L <br />100.0 <br />102% <br />82-124 <br />(CH 2173960-001) <br />MSD <br />mg/L <br />100.0 <br />103% <br />82-124 <br />MSRPD <br />mg1l, <br />10.00 <br />0.7% <br /><_23 <br />300.0 <br />06/10/21:208775MCA <br />CCB <br />mg/L <br />0.125 <br />0.5 <br />CCV <br />mg/L <br />50.00 <br />98.9% <br />90-110 <br />CCB <br />mg/L <br />0.138 <br />0.5 <br />CCV <br />m <br />50.00 <br />98.8% <br />90-110 <br />itrate + Nitrite as N <br />4500NO3F <br />05/20/21:205642VVH <br />Blank <br />mg/L <br />ND <br /><0.2 <br />LCS <br />mg/L <br />11.22 <br />96.7% <br />80-120 <br />MS <br />mg/L 1 <br />5.609 <br />95.8% <br />5-285 <br />Page 7 of 8 <br />