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March 2, 2021 Lab ID : STK2131947 <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 />02/10/21:202083AC <br />CCB <br />PPM <br />0.05 <br />1 <br />inc <br />200.7 <br />MS <br />ug/L <br />800.0 <br />95.4% <br />75-125 <br />(STK2131947-001) <br />MSD <br />ug/L <br />800.0 <br />90.5% <br />75-125 <br />MSRPD <br />ug/L <br />4000 <br />5.2% <br />:520.0 <br />200.7 <br />02/10/21:202083AC <br />CCV <br />ppm <br />1.000 <br />102% <br />90-110 <br />CCB <br />ppm <br />0.0011 <br />0.02 <br />CCV <br />ppm <br />1.000 <br />99.6% <br />90-110 <br />CCB <br />ppm <br />0.0006 1 <br />0.02 <br />Wet Chem <br />Alkalinity (as CaCO3) <br />2320B <br />(STK2131970-001) <br />Dup <br />mg/L <br />7.2 <br />10 <br />2320B <br />02/11/21:202087AMM <br />CCV <br />mg/L <br />235.8 <br />94.0% <br />90-110 <br />CCV <br />m <br />235.8 <br />90.6% <br />90-110 <br />Bicarbonate <br />2320B <br />(STK2131970-001) <br />Dup <br />m <br />8.8 <br />10 <br />Carbonate <br />2320B <br />(STK2131970-001) <br />Dup <br />mg/L <br />0.0 <br />10 <br />Hydroxide <br />2320B <br />(STK2131970-001) <br />Dup <br />m <br />0.0 <br />10 <br />Conductivity <br />2510B <br />02/12/21:202121STA <br />ICB <br />umhos/cm <br />0.12 <br />1 <br />CCV <br />umhos/cm <br />999.0 <br />97.7% <br />95-105 <br />CCV <br />umbos/cm <br />999.0 <br />97.1% <br />95-105 <br />E. C. <br />2510B <br />02/12/21:201562sta <br />Blank <br />umhos/cm <br />ND <br /><1 <br />(SP 2101924-001) <br />Dup <br />umhos/cm <br />0.5% <br />5 <br />Total Dissolved Solids (TFR) <br />2540CE <br />(VI 2140930-00t) <br />Dup <br />mg/L <br />0.4% <br />5 <br />Blank <br />mg/L <br />ND <br /><20 <br />LCS <br />mg/L <br />993.8 <br />98.4% <br />90-110 <br />(VI 2140930-001) <br />Dup <br />m <br />3.7% <br />5 <br />Chloride <br />300.0 <br />02/09/21:201408MCA <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 />84.1% <br />85-121 <br />435 <br />(CH 2170944-001) <br />MSD <br />mg/L <br />50.00 <br />85.3% <br />85-121 <br />MSRPD <br />mg/L <br />10.00 <br />0.6% <br />:519 <br />MS <br />mg/L <br />50.00 <br />83.4% <br />85-121 <br />435 <br />(CH 2170944-005) <br />MSD <br />mg/L <br />50.00 <br />83.9% <br />85-121 <br />435 <br />MSRPD <br />m <br />10.00 <br />0.2% <br /><19 <br />300.0 <br />02/09/21:202017MCA <br />CCB <br />mg/L <br />0.1 <br />1 <br />CCV <br />mg/L <br />25.00 <br />99.4% <br />90-110 <br />CCB <br />mg/L <br />0.08 <br />1 <br />CCV <br />mg/L <br />25.00 <br />99.3% <br />90-110 <br />Fluoride <br />300.0 <br />02/09/21:201408MCA <br />Blank <br />mg/L <br />ND <br /><0.1 <br />LCS <br />mg/L <br />2.500 <br />101% <br />90-110 <br />MS <br />mg/L <br />5.000 <br />102% <br />87-120 <br />(CH 2170944-001) <br />MSD <br />mg/L <br />5.000 <br />103% <br />87-120 <br />MSRPD <br />mg/L <br />10.00 <br />1.0% <br />:516 <br />MS <br />mg/L <br />5.000 <br />102% <br />87-120 <br />(CH 2170944-005) <br />MSD <br />mg/L <br />5.000 <br />102% <br />87-120 <br />MSRPD <br />m <br />10.00 <br />0.5% <br />516 <br />300.0 <br />02/09/21:202017MCA <br />CCB <br />mg/L <br />0.000 <br />0.1 <br />CCV <br />mg/L <br />2.500 <br />98.5% <br />90-110 <br />CCB <br />mg/L <br />0.000 <br />0.1 <br />CCV <br />m <br />2.500 <br />98.4% <br />90-110 <br />Nitrate <br />300.0 <br />02/09/21:201408MCA <br />Blank <br />mg/L <br />ND <br /><0.4 <br />LCS <br />mg/L <br />20.00 <br />101% <br />90-110 <br />MS <br />mg/L <br />40.00 <br />99.4% <br />85-119 <br />(CH 2170944-001) <br />MSD <br />mg/L <br />40.00 <br />101% <br />85-119 <br />MSRPD <br />mg/L <br />10.00 <br />1.4% <br />:519 <br />MS <br />I mg/L <br />1 40.00 <br />1 99.6% <br />1 85-119 <br />Page 7 of 9 <br />