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March 16, 2022 Lab ID : STK2232853 <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 />l)QO <br />Note <br />Metals <br />Sodium <br />200.7 <br />03/02/22:203184AC <br />CCB <br />PPM <br />1 <br />inc <br />200.7 <br />MS <br />ug/L <br />800.0 <br />9;.7 % <br />75-125 <br />(CC 2280683-001) <br />MSD <br />ug/L <br />800.0 <br />91.7% <br />75-125 <br />MSRPD <br />u L <br />4000 <br />2.1% <br />5_20.0 <br />200.7 <br />03/02/22:203184AC <br />CCB <br />ppm <br />0.000007 <br />0.02 <br />CCV <br />ppm <br />1.000 <br />96.3 % <br />90-110 <br />CCV <br />ppm <br />1.000 <br />93.9% <br />90-110 <br />CCB <br />I ppin <br />-0.0002 <br />1 0.02 <br />Wet Chem <br />Alkalinity (as CaCO3) <br />2320B <br />(CH 2271265-004) <br />Dup <br />mg/L <br />0.8% <br />10 <br />2320B <br />03/07/22:203342AMM <br />CCV <br />mg/L <br />235.8 <br />100% <br />90-110 <br />CCV <br />mg/L <br />235.8 <br />96.8% <br />90-110 <br />Bicarbonate <br />2320B <br />(CH 2271265-004) <br />Du <br />mg/L <br />0.8% <br />10 <br />Carbonate <br />2320B <br />(CFI 2-171265-004) <br />Du <br />mg/L <br />0.0 <br />10 <br />Hydroxide <br />2320B <br />(CH 2271265-004) <br />Dup <br />mg/L <br />0.0 <br />10 <br />Conductivity <br />2510B <br />03/03/22:203178sta <br />ICB <br />umhos/cm <br />0.0700 <br />1 <br />ICV <br />umhos/cm <br />997.0 <br />98.0% <br />95-105 <br />CCV <br />umhos/cm <br />997.0 <br />97.8% <br />95-105 <br />E. C. <br />2510B <br />03/03/22:202425sta <br />Blank <br />umhos/cm <br />ND <br /><1 <br />(CC 2280683-002) <br />Dup <br />umhos/cm <br />0.2%n <br />5 <br />Total Dissolved Solids (TFR) <br />2540CE <br />03/02/22:202411 EJC <br />Blank <br />mg/L <br />ND <br /><20 <br />LCS <br />mg/L <br />991.1 <br />102% <br />90-110 <br />(VI 2241405-001) <br />Dup <br />mg/L <br />4.3% <br />(VI 2241405-001) <br />Dup <br />mg/L <br />3.3% <br />Chloride <br />300.0 <br />03/01/22:202322NJB <br />Blank <br />mg/L <br />ND <br /><1 <br />LCS <br />mg/L <br />25.00 <br />100% <br />90-110 <br />MS <br />mg/L <br />50.00 <br />92.3% <br />85-121 <br />(STK2232761-001) <br />MSD <br />mg/L <br />50.00 <br />98.9% <br />85-121 <br />MSRPD <br />mg/L <br />10.00 <br />5.5% <br />5_19 <br />MS <br />mg/L <br />50.00 <br />94.6% <br />85-121 <br />(STK2232783-001) <br />MSD <br />mg/L <br />50.00 <br />97.4% <br />85-121 <br />MSRPD <br />mg/L <br />10.00 <br />2.2%n <br />5519 <br />300.0 <br />03/01/22:203131njb <br />CCB <br />mg/I <br />0.0920 <br />1 <br />CCV <br />urJl <br />25.00 <br />103% <br />90-110 <br />CCB <br />ntg/l <br />0.0960 <br />1 <br />CCV <br />Mg/1 <br />25.00 <br />102% <br />90-110 <br />Fluoride <br />300.0 <br />03/01/22:202322NJB <br />Blank <br />mg/L <br />ND <br /><0.1 <br />LCS <br />mg/L <br />2.500 <br />102% <br />90-110 <br />MS <br />mg/L <br />5.000 <br />97.0% <br />87-120 <br />(STK2232761-001) <br />MSD <br />mg/L <br />5.000 <br />101% <br />87-120 <br />MSRPD <br />mg/L <br />10.00 <br />6.3% <br />5_16 <br />MS <br />mg/L <br />5.000 <br />99.7% <br />87-120 <br />(STK2232783-001) <br />MSD <br />mg/L <br />5.000 <br />102% <br />87-I'0 <br />MSRPD <br />mg/L <br />10.00 <br />2.2% <br />h <br />;00.0 <br />03/01/22:203131njb <br />CCB <br />mg/l <br />0.00 <br />0.1 <br />CCV <br />mg/l <br />2.500 <br />101% <br />90-110 <br />CCB <br />mg/l <br />0.00 <br />0.1 <br />CCV <br />mg/l <br />2.500 <br />99.2% <br />90-110 <br />Nitrate <br />300.0 <br />03/01/22:202322NJB <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 />85.3% <br />85-119 <br />(STK2232761-001) <br />MSD <br />mg/L <br />40.00 <br />91.1 % <br />85-119 <br />MSRPD <br />mg/L <br />10.00 <br />3.5% <br />519 <br />IS <br />mJL <br />40.00 <br />95.2 % <br />95-119 <br />Page 7 of 9 <br />