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March 24, 2022 Lab ID : STK2233303 <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 />03/10/22:203558AC <br />CCB <br />PPM <br />-0.03 <br />1 <br />inc <br />200.7 <br />MS <br />ug/L <br />800.0 <br />115% <br />75-125 <br />(SP 2203652-001) <br />MSD <br />ug/L <br />800.0 <br />104% <br />75-125 <br />MSRPD <br />ug/L <br />4000 <br />9.1% <br />:520.0 <br />200.7 <br />03/10/22:203558AC <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 />109% <br />90-110 <br />CCB <br />ppm <br />-0.0004 <br />1 0.02 <br />Wet Chem <br />Alkalinity (as CaCO3) <br />2320B <br />(STK2233498-001) <br />Dup <br />I mg/L <br />0.7% <br />10 <br />2320B <br />03/17/22:203983AMM <br />CCV <br />mg/L <br />235.8 <br />104% <br />90-110 <br />CCV <br />mg/L <br />235.8 <br />96.8% <br />90-110 <br />Bicarbonate <br />2320B <br />(STK2233498-001) <br />Dup <br />mg/L <br />0.9% <br />10 <br />Carbonate <br />2320B <br />(STK2233498-001) <br />Dup <br />mg/L <br />0.0 <br />1 10 <br />Hydroxide <br />2320B <br />(STK2233498-001) <br />Dup <br />mg/L <br />0.0 <br />10 <br />Conductivity <br />2510B <br />03/16/22:203799sta <br />ICB <br />umhos/cm <br />0.0700 <br />1 <br />CCV <br />umhos/cm <br />997.0 <br />97.1% <br />95-105 <br />CCV <br />umhos/cm <br />997.0 <br />96.8% <br />95-105 <br />E. C. <br />2510B <br />03/16/22:202890sta <br />Blank <br />umhos/cm <br />ND <br /><I <br />(SP 2203764-001) <br />Dup <br />umhos/em <br />0.2% <br />5 <br />Total Dissolved Solids (TFR) <br />2540CE <br />03/10/22:20270OCTL <br />Blank <br />mg/L <br />ND <br /><20 <br />LCS <br />mg/L <br />991.1 <br />101% <br />90-110 <br />(CC 2280815-001) <br />Dup <br />mg/L <br />2.7% <br />5 <br />CC 2280815-001) <br />Dup <br />I m <br />2.8% <br />5 <br />Chloride <br />300.0 <br />03/09/22:202632NJB <br />Blank <br />mg/L <br />ND <br /><1 <br />LCS <br />mg/L <br />25.00 <br />101% <br />90-110 <br />MS <br />mg/L <br />50.00 <br />88.2% <br />85-121 <br />(CC 2280799-001) <br />MSD <br />mg/L <br />50.00 <br />92.6% <br />85-121 <br />MSRPD <br />mg/L <br />10.00 <br />2.7% <br />5519 <br />MS <br />mg/L <br />50.00 <br />88.8% <br />85-121 <br />(CC 2280799-002) <br />MSD <br />mg/L <br />50.00 <br />92.1% <br />85-121 <br />MSRPD <br />m <br />10.00 <br />2.3% <br />:519 <br />100.0 <br />03/09/22:203516njb <br />CCB <br />1-9/1 <br />0.0840 <br />1 <br />CCV <br />mg/1 <br />25.00 <br />104% <br />90-110 <br />CCB <br />mg/l <br />0.133 <br />1 <br />CCV <br />mg/l <br />25.00 <br />103% <br />90-110 <br />Fluoride <br />300.0 <br />03/09/22:202632NJB <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 />97.6% <br />87-120 <br />(CC 2280799-001) <br />MSD <br />m9/1- <br />5.000 <br />102% <br />87-120 <br />MSRPD <br />mg/L <br />10.00 <br />4.6% <br />:516 <br />MS <br />mg/L <br />5.000 <br />97.1% <br />87-120 <br />(CC 2280799-002) <br />MSD <br />1119/1- <br />5.000 <br />101% <br />87-120 <br />MSRPD <br />m <br />10.00 <br />3.6% <br />:516 <br />300.0 <br />03/09/22:203516njb <br />CCB <br />m9/1 <br />0.00 <br />0.1 <br />CCV <br />mg/l <br />2.500 <br />104% <br />90-110 <br />CCB <br />mg/l <br />0.00 <br />0.1 <br />CCV <br />mg/l <br />2.500 <br />103% <br />90-110 <br />Nitrate <br />300.0 <br />03/09/22:202632NJB <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 />97.2% <br />85-119 <br />(CC 2280799-001) <br />MSD <br />mg/L <br />40.00 <br />102% <br />85-119 <br />MSRPD <br />mg/L <br />10.00 <br />4.1% <br />:519 <br />MS <br />I mg/L <br />1 40.00 <br />1 95.3% <br />1 85-119 <br />Page 7 of 9 <br />