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May 12, 2021 Lab ID : STK2135657 <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 />05/04/21:206620AC <br />CCV <br />PPM <br />25.00 <br />98.3 % <br />90-110 <br />inc <br />200.7 <br />MS <br />ug/L <br />800.0 <br />114% <br />75-125 <br />(STK2135836-001) <br />MSD <br />ug/L <br />800.0 <br />105% <br />75-125 <br />MSRPD <br />u L <br />4000 <br />7.5% <br />_<20.0 <br />200.7 <br />05/05/21:206672AC <br />CCV <br />ppm <br />1.000 <br />97.2% <br />90-110 <br />CCB <br />ppm <br />0.0031 <br />0.02 <br />CCV <br />ppm <br />1.000 <br />99.1 % <br />90-110 <br />CCB <br />ppm <br />0.0032 <br />0.02 <br />Wet Chem <br />Alkalinity (as CaCO3) <br />2320B <br />(SP 2105514-002) <br />Du <br />mg/L <br />1.2% <br />10 <br />2320B <br />05/03/21:206565AMM <br />CCV <br />mg/L <br />235.8 <br />93.9% <br />90-110 <br />CCV <br />mg/L <br />235.8 <br />95.3% <br />90-110 <br />Bicarbonate <br />2320B <br />(SP 2105514-002) <br />Du <br />mg/L <br />1.2% <br />10 <br />Carbonate <br />2320B <br />(SP 2105514-002) <br />Du <br />mg/L <br />0.0 <br />10 <br />Hydroxide <br />2320B <br />(SP 2105514-002) <br />Du <br />mg/L <br />0.0 <br />10 <br />Conductivity <br />2510B <br />05/04/21:206527sta <br />ICB <br />umhos/cm <br />0.09 <br />1 <br />CCV <br />umhos/cm <br />1000 <br />96.4% <br />95-105 <br />CCV <br />umhos/cm <br />1000 <br />96.3% <br />95-105 <br />E. C. <br />2510B <br />05/04/21:204853sta <br />Blank <br />umhos/cm <br />ND <br /><1 <br />(SP 2105173-003) <br />Dup <br />umhos/cm <br />0.3% <br />5 <br />Total Dissolved Solids (TFR) <br />2540CE <br />04/29/21:20469 1 CTL <br />Blank <br />mg/L <br />ND <br /><20 <br />LCS <br />mg/L <br />995.0 <br />102% <br />90-110 <br />(SP 2105592-001) <br />Dup <br />mg/L <br />0.06% <br />5 <br />(SP 2105592-00 1) <br />Dup <br />mg/L <br />0.5% <br />5 <br />hloride <br />300.0 <br />04/27/21:20454 1 MCA <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 />100% <br />85-121 <br />(CH 2172862-001) <br />MSD <br />mg/L <br />50.00 <br />102% <br />85-121 <br />MSRPD <br />mg/L <br />10.00 <br />1.4% <br /><19 <br />MS <br />mg/L <br />50.00 <br />101% <br />85-121 <br />(CH 2172862-002) <br />MSD <br />mg/L <br />50.00 <br />103% <br />85-121 <br />MSRPD <br />mg/L <br />10.00 <br />1.8% 1 <br /><19 <br />300.0 <br />04/27/21:206329MCA <br />CCB <br />mg/L <br />0.09 <br />1 <br />CCV <br />mg/L <br />25.00 <br />103% <br />90-110 <br />CCB <br />mg/L <br />0.09 <br />1 <br />CCV <br />mg/L <br />25.00 <br />103% <br />90-110 <br />Fluoride <br />300.0 <br />04/27/21:204541MCA <br />Blank <br />mg/L <br />ND <br /><0.1 <br />LES <br />mg/L <br />2.500 <br />102% <br />90-110 <br />MS <br />mg/L <br />5.000 <br />101% <br />87-120 <br />(CH 2172862-001) <br />MSD <br />mg/L <br />5.000 <br />103% <br />87-120 <br />MSRPD <br />mg/L <br />10.00 <br />1.5% <br /><16 <br />MS <br />mg/L <br />5.000 <br />100% <br />87-120 <br />(CH 2172862-002) <br />MSD <br />mg/L <br />5.000 <br />102% <br />87-120 <br />MSRPD <br />mg/L <br />10.00 <br />1.8% <br /><16 <br />300.0 <br />04/27/21:206329MCA <br />CCB <br />mg/L <br />0.000 <br />0.1 <br />CCV <br />mg/L <br />2.500 <br />102% <br />90-110 <br />CCB <br />mg/L <br />0.000 <br />0.1 <br />CCV <br />mg/L <br />2.500 <br />102% <br />90-110 <br />Nitrate <br />300.0 <br />04/27/21:20454 1 MCA <br />Blank <br />mg/L <br />ND <br /><0.4 <br />LCS <br />mg/L <br />20.00 <br />103% <br />90-110 <br />MS <br />mg/L <br />40.00 <br />103% <br />85-119 <br />(CH 2172862-001) <br />MSD <br />mg/L <br />40.00 <br />104% <br />85-119 <br />MSRPD <br />mg/L <br />10.00 <br />1.6% <br /><19 <br />MS I <br />mg/L 1 <br />40.00 1 <br />101% 1 <br />85-119 <br />Page 7 of 9 <br />