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March 23, 2021 Lab ID : STK2133084 <br />San Joaquin Co. Environmental Health Dep Customer :3-17919 <br />Quality Control - Inorganic <br />Constituent <br />Method <br />Date/Ill <br />I'}'pe <br />Units <br />Conc. <br />QC Data <br />DQO <br />Note <br />Metals <br />Sodium <br />200.7 <br />03/05/21:203373AC <br />CCB <br />ppm <br />0.04 <br />1 <br />inc <br />200.7 <br />MS <br />ug/L <br />800.0 <br />88.9% <br />75-125 <br />(VI 2141636-001) <br />MSDug/L <br />800.0 <br />90.5 % <br />75-125 <br />MSRPD <br />u <br />800.0 <br />1.6% <br />520.0 <br />200.7 <br />03/05/21:203373AC <br />CCV <br />ppm <br />1.000 <br />94.7% <br />90-110 <br />CCB <br />ppm <br />0.0013 <br />0.02 <br />CCV <br />ppm <br />1.000 <br />95.4% <br />90-110 <br />CCB <br />ppm <br />0.0013 <br />0.02 <br />Wet Chem <br />Alkalinity (as CaCO3) <br />23208 <br />(CH 2171513-005) <br />Dup <br />m <br />1.11h <br />10 <br />2320B <br />03/15/21:203814AMM <br />CCV <br />mg/L <br />235.8 <br />95.5% <br />90-110 <br />CCV <br />mgfL <br />235.8 <br />97.7% <br />90-110 <br />Bicarbonate <br />2320B <br />(CH 2171513-005) <br />Du <br />m <br />1.1% <br />10 <br />Carbonate <br />2320B <br />(CH 2171513-005) <br />Du <br />m <br />0.0 <br />10 <br />Hydroxide <br />2320B <br />(CH 2171513-005) <br />Du <br />m <br />0.0 <br />10 <br />Conductivity <br />2510B <br />03/15/21:203776sta <br />ICB <br />umhos/cm <br />0.08 <br />l <br />ICV <br />umhos/cm <br />999.0 <br />103% <br />95-105 <br />CCV <br />umhos/cm <br />999.0 <br />102% <br />95-105 <br />E. C. <br />2510B <br />03/15/21:202797sta <br />Blank <br />umhos/cm <br />ND <br /><1 <br />(STK2133079-001) <br />Dup <br />umhos/cm <br />0.1% <br />5 <br />Total Dissolved Solids (TFR) <br />2540CE <br />03/09/21:20258ICTL <br />Blank <br />mg/L <br />ND <br /><20 <br />LCS <br />mg/L <br />995.0 <br />100% <br />90-110 <br />(SP 2103094-003) <br />Dup <br />mg/L <br />0.7% <br />5 <br />(SP 2103094-003) <br />Dup <br />m <br />0.8% <br />5 <br />Chlcnidc <br />300.0 <br />03/05/21:202411 MCA <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 />97.0% <br />85-121 <br />(STK2133080-001) <br />MSD <br />mg/L <br />50.00 <br />97.6% <br />85-121 <br />MSRPD <br />mg/L <br />10.00 <br />0.5% <br />4519 <br />MS <br />mg/L <br />50.00 <br />99.4% <br />85-121 <br />(STK2133085-001) <br />MSD <br />mg/L <br />50.00 <br />101% <br />85-121 <br />MSRPD <br />m <br />10.00 <br />1.3% <br />:519 <br />300.0 <br />03/05/21:203335MCA <br />CCB <br />mg/L <br />0.13 <br />1 <br />CCV <br />mg/L <br />25.00 <br />103% <br />90-110 <br />CCB <br />mg/L. <br />0.12 <br />1 <br />CCV <br />m <br />25.00 <br />103% <br />90-110 <br />Fluoride <br />300.0 <br />03/05/21:202411 MCA <br />Blank <br />mg/L <br />ND <br /><0.1 <br />LES <br />mg/L <br />2.500 <br />105% <br />90-110 <br />MS <br />mg/L <br />5.000 <br />104% <br />87-120 <br />(STK2133080-001) <br />MSD <br />mg/L <br />5.000 <br />104% <br />87-120 <br />MSRPD <br />mg/L <br />10.00 <br />0.08% <br />516 <br />MS <br />mg/L <br />5.000 <br />102% <br />87-120 <br />(STK2133085-001) <br />MSD <br />mg/L <br />5.000 <br />104% <br />87-120 <br />MSRPD <br />mg/L <br />10.00 <br />1.8% <br />5516 <br />300.0 <br />03/05/21:203335MCA <br />CCB <br />mg/L <br />0.015 <br />0.1 <br />CCV <br />mg/L <br />2.500 <br />104% <br />90-110 <br />CCB <br />mg/L <br />0.015 <br />0.1 <br />CCV <br />M91L <br />2.500 <br />103% <br />90-110 <br />'.Nitrate <br />300.0 <br />03/05/21:202411 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 />(STK2133080-001) <br />MSD <br />mg/L <br />40.00 <br />104% <br />85-119 <br />MSRPD <br />mg/L <br />10.00 <br />0.6% <br />:519 <br />MS <br />I m <br />40.00 <br />1 91.6% <br />1 85-119 <br />Page 7 of 9 <br />