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March 16, 2022 Lab ID : STK2232361 <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 />I)QO <br />Note <br />Metals <br />Sodium <br />200.7 <br />02/17/22:202485AC <br />CCB <br />ppro, <br />-0.007 <br />1 <br />Zinc <br />200.7 <br />MS <br />ug/L <br />800.0 <br />103% <br />75-125 <br />(CC 2280568-001) <br />MSD <br />ug/L <br />800.0 <br />103% <br />75-125 <br />MSRPD <br />ug/L <br />4000 <br />0.4% <br />:520.0 <br />200.7 <br />02/17/22:202485AC <br />CCV <br />ppm <br />1.000 <br />101% <br />90-110 <br />CCB <br />ppm <br />0.0003 <br />0.02 <br />CCV <br />ppm <br />1.000 <br />99.8% <br />90-110 <br />CCB <br />ppm <br />0.0004 <br />0.02 <br />Wet Chem <br />Alkalinity (as CaCO3) <br />2320B <br />(VI 2241045-001) <br />Dup <br />m L <br />0.2% <br />10 <br />2320B <br />02/23/22:202757AMM <br />CCV <br />mg/L <br />235.8 <br />94.3% <br />90-110 <br />CCV <br />m <br />235.8 <br />94.9% <br />90-110 <br />Bicarbonate <br />2320B <br />VI 2241045-001) <br />Dup <br />to <br />0.2% <br />10 <br />Carbonate <br />2320B <br />VI 2241045-001 <br />Dup <br />mg/L <br />0.0 <br />10 <br />Hydroxide <br />2320B <br />I2241045-001 <br />Dup <br />m <br />0.0 <br />10 <br />Conductivity <br />2510B <br />02/21/22:202588sta <br />ICB <br />umhos/em <br />0.130 <br />1 <br />CCV <br />umhos/cm <br />997.0 <br />96.6% <br />95-105 <br />CCV <br />umhos/cm <br />997.0 <br />97.6% <br />95-105 <br />E. C. <br />2510B <br />02/21/22:201964sta <br />Blank <br />umhos/cm <br />ND <br /><1 <br />SP 2202622-003) <br />Dup <br />umhos/cm <br />1 0.4% <br />5 <br />Total Dissolved Solids (TFR) <br />2540CE <br />02/17/22:2018SICTL <br />Blank <br />mg/L <br />ND <br /><20 <br />LCS <br />mg/L <br />991.0 <br />99.2% <br />90-110 <br />(SP 2202628-001) <br />Dup <br />mg/L <br />0.2% <br />5 <br />SP 2202628-001 <br />Du <br />m <br />0.1% <br />5 <br />Chloride <br />300.0 <br />02/16/22:201798NJB <br />Blank <br />mg/L <br />ND <br /><l <br />LCS <br />mg/L <br />25.00 <br />100% <br />90-110 <br />MS <br />mg/L <br />50.00 <br />93.4% <br />85-121 <br />(STK2231760-001) <br />MSD <br />mg/L <br />50.00 <br />105% <br />85-121 <br />MSRPD <br />mg/L <br />10.00 <br />10.6% <br />:519 <br />MS <br />mg/L <br />50.00 <br />96.9% <br />85-121 <br />(CH 2270822-001) <br />MSD <br />mg/L <br />50.00 <br />101% <br />85-121 <br />MSRPD <br />m <br />10.00 <br />4.5% <br /><19 <br />300.0 <br />02/16/22:202434njb <br />CCB <br />mg/1 <br />0.0770 <br />1 <br />CCV <br />mg/l <br />25.00 <br />102% <br />90-110 <br />CCB <br />mg/l <br />0.0760 <br />1 <br />CCV <br />m /I <br />25.00 <br />102% <br />90-110 <br />Fluoride <br />300.0 <br />02/16/22:201798NJB <br />Blank <br />mg/L <br />ND <br /><0.1 <br />LCS <br />mg/L <br />2.500 <br />99.4% <br />90-110 <br />MS <br />mg/L <br />5.000 <br />94.7% <br />87-120 <br />(STK2231760-001) <br />MSD <br />mg/L <br />5.000 <br />106% <br />87-120 <br />MSRPD <br />mg/L <br />10.00 <br />11.3% <br />:5I6 <br />MS <br />mg/L <br />5.000 <br />98.4% <br />87-120 <br />(CH 2270822-001) <br />MSD <br />mg/L <br />5.000 <br />103% <br />87-120 <br />MSRPD <br />mg/L <br />10.00 <br />4.6% <br /><16 <br />300.0 <br />02/16/22:202434njb <br />CCB <br />me/I <br />0.00 <br />0.1 <br />CCV <br />mg/I <br />2.500 <br />102% <br />90-110 <br />CCB <br />mg/l <br />0.00 <br />0.1 <br />CCV <br />ntg/I <br />2.500 <br />103% <br />90-110 <br />Nitrate <br />300.0 <br />02/16/22:201798NJB <br />Blank <br />mg/L <br />ND <br /><0.4 <br />LCS <br />tngfL <br />20.00 <br />97.0% <br />90-110 <br />MS <br />mg/L <br />40.00 <br />94.3% <br />85-119 <br />(STK2231760-001) <br />MSD <br />mg/L <br />40.00 <br />106% <br />85-119 <br />MSRPD <br />mg/L <br />10.00 <br />11.3% <br />:519 <br />MS <br />mgfL <br />40.00 <br />95.7% <br />85-119 <br />Page 7 of 9 <br />