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April 14, 2021 Lab ID : STK2134144 <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 />04/01/21:204805AC <br />CCB <br />PPM <br />0.02 <br />1 <br />inc <br />200.7 <br />MS <br />ug/L <br />800.0 <br />98.5% <br />75-125 <br />(SP 2104299-00 1) <br />MSD <br />ug/L <br />800.0 <br />100% <br />75-125 <br />MSRPD <br />u <br />4000 <br />1.6% <br /><20.0 <br />200.7 <br />04/01/21:204805AC <br />CCV <br />ppm <br />1.000 <br />107% <br />90-110 <br />CCB <br />ppm <br />-0.0005 <br />0.02 <br />CCV <br />ppm <br />1.000 <br />102% <br />90-110 <br />CCB <br />ppm <br />-0.0004 <br />0.02 <br />Wet Chem <br />Alkalinity (as CaCO3) <br />2320B <br />(CH 2172031-001) <br />Dup <br />mg/L <br />0.07% <br />10 <br />2320B <br />04/04/21:204922AMM <br />CCV <br />mg/L <br />235.8 <br />99.0% <br />90-110 <br />CCV <br />mg/L <br />235.8 <br />103% <br />90-110 <br />Bicarbonate <br />2320B <br />(CH 2172031-001) <br />Dup <br />mg/L <br />0.05% <br />10 <br />Carbonate <br />2320B <br />(CH 217203 1-00 1) <br />Du <br />m L <br />0.0 <br />10 <br />Hydroxide <br />2320B <br />(CH 217203 1-00 1) <br />Dup <br />mg/L <br />0.0 <br />10 <br />Conductivity <br />2510B <br />04/06/21:204947sta <br />ICB <br />umhos/cm <br />0.06 <br />1 <br />CCV <br />umhos/cm <br />999.0 <br />97.3% <br />95-105 <br />CCV <br />umhos/cm <br />999.0 <br />97.0% <br />95-105 <br />E. C. <br />2510B <br />04/06/21:203644sta <br />Blank <br />umhos/cm <br />ND <br /><I <br />(SP 2104445-001) <br />Dup <br />umhos/cm <br />0.2% <br />5 <br />Total Dissolved Solids (TFR) <br />2540CE <br />04/01/21:203492CTL <br />Blank <br />mg/L <br />4.3 <br />20 <br />LCS <br />mg/L <br />995.0 <br />101% <br />90-110 <br />(SP 2104296-003) <br />Dup <br />mg/L <br />0.4% <br />5 <br />(SP 2104296-003) <br />Dup <br />m L <br />1 <br />2.0% <br />5 <br />Chloride <br />300.0 <br />03/31/21:203423MCA <br />Blank <br />mg/L <br />ND <br /><1 <br />LCS <br />mg/L <br />25.00 <br />103% <br />90-110 <br />MS <br />mg/L <br />50.00 <br />99.7% <br />85-121 <br />(STK2134144-001) <br />MSD <br />mg/L <br />50.00 <br />100% <br />85-121 <br />MSRPD <br />mg/L <br />10.00 <br />0.4% <br /><19 <br />MS <br />mg/L <br />50.00 <br />93.5% <br />85-121 <br />(STK21341 I 1 -00 1) <br />MSD <br />mg/L <br />50.00 <br />93.7% <br />85-121 <br />MSRPD <br />mg/L <br />10.00 <br />0.1% <br /><19 <br />300.0 <br />03/31/21:204837MCA <br />ICB <br />mg/L <br />0.08 <br />1 <br />ICV <br />mg/L <br />25.00 <br />103% <br />90-110 <br />CCB <br />mg/L <br />0.08 <br />1 <br />CCV <br />m <br />25.00 <br />104% <br />90-110 <br />Fluoride <br />300.0 <br />03/31/21:203423MCA <br />Blank <br />mg/L <br />ND <br /><0.1 <br />LCS <br />mg/L <br />2.500 <br />108% <br />90-110 <br />MS <br />mg/L <br />5.000 <br />105% <br />87-120 <br />(STK2134144-001) <br />MSD <br />mg/L <br />5.000 <br />105% <br />87-120 <br />MSRPD <br />mg/L <br />10.00 <br />0.2% <br />516 <br />MS <br />mg/L <br />5.000 <br />106% <br />87-120 <br />(STK2134111-001) <br />MSD <br />mg/L <br />5.000 <br />106% <br />87-120 <br />MSRPD <br />mg/L <br />10.00 <br />0.09% <br /><16 <br />300.0 <br />03/31/21:204837MCA <br />ICB <br />mg/L <br />0.000 <br />0.1 <br />ICV <br />mg/L <br />2.500 <br />107% <br />90-110 <br />CCB <br />mg/L <br />0.000 <br />0.1 <br />CCV <br />mg/L <br />2.500 <br />106% <br />90-110 <br />Nitrate <br />300.0 <br />03/31/21:203423MCA <br />Blank <br />mg/L <br />ND <br /><0.4 <br />LCs <br />mg/L <br />20.00 <br />104% <br />90-110 <br />MS <br />mg/L <br />40.00 <br />99.5% <br />85-119 <br />(STK2134144-001) <br />MSD <br />mg/L <br />40.00 <br />100% <br />85-119 <br />MSRPD <br />mg/L <br />10.00 <br />0.4% <br /><19 <br />MS I <br />mg/L 1 <br />40.00 1 <br />106% 1 <br />85-119 <br />Page 7 of 9 <br />