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May 5, 2021 Lab ID : STK2135169 <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 />Wet Chem <br />Nitrate <br />300.0 <br />(VI 2142834-002) <br />MSD <br />mg/L <br />40.00 <br />105% <br />85-119 <br />MSRPD <br />mg/L <br />10.00 <br />0.04% <br /><19 <br />300.0 <br />04/16/21:205665MCA <br />ICB <br />mg/L <br />0.000 <br />0.5 <br />ICV <br />mg/L <br />20.00 <br />103% <br />90-110 <br />CCB <br />mg/L <br />0.000 <br />0.5 <br />CCV <br />mg/L <br />20.00 <br />103% <br />90-110 <br />Nitrate+ Nitrite as N <br />300.0 <br />04/16/21:204142MCA <br />Blank <br />mg/L <br />ND <br /><0.1 <br />Nitrate Nitrogen <br />300.0 <br />04/16/21:204142MCA <br />Blank <br />mg1L <br />ND <br /><0.1 <br />Nitrite <br />300.0 <br />04/16/21:204142MCA <br />Blank <br />mg/L <br />ND <br /><0.5 <br />LCS <br />mg/L <br />15.00 <br />102% <br />90-110 <br />MS <br />mg/L <br />30.00 <br />103% <br />74-126 <br />(STK2135169-001) <br />MSD <br />mg/L <br />30.00 <br />103% <br />74-126 <br />MSRPD <br />mg/L <br />10.00 <br />0.2% <br /><20 <br />MS <br />mg/L <br />30.00 <br />102% <br />74-126 <br />(VI 2142834-002) <br />MSD <br />mg/L <br />30.00 <br />102% <br />74-126 <br />MSRPD <br />mg/L <br />10.00 <br />0.09% <br /><20 <br />300.0 <br />04/16/21:205665MCA <br />ICB <br />mg/L <br />0.000 <br />0.5 <br />ICV <br />mg/L <br />15.00 <br />102% <br />90-110 <br />CCB <br />mg/L <br />0.000 <br />0.5 <br />CCV <br />m <br />15.00 <br />102% <br />90-110 <br />Nitrite Nitrogen <br />300.0 <br />04/16/21:204142MCA <br />Blank <br />mg/L <br />ND <br /><0.2 <br />Sulfate <br />300.0 <br />04/16/21:204142MCA <br />Blank <br />mg/L <br />ND <br /><0.5 <br />LCS <br />mg/L <br />50.00 <br />107% <br />90-110 <br />MS <br />mg/L <br />100.0 <br />111 % <br />82-124 <br />(STK2135169-001) <br />MSD <br />mg/L <br />100.0 <br />111 % <br />82-124 <br />MSRPD <br />mg/L <br />10.00 <br />0.05% <br />_<23 <br />MS <br />mg/L <br />100.0 <br />110% <br />82-124 <br />(VI 2142834-002) <br />MSD <br />mg/L <br />100.0 <br />110% <br />82-124 <br />MSRPD <br />mg/L <br />10.00 <br />0.3% <br /><23 <br />300.0 <br />04/16/21:205665MCA <br />ICB <br />mg/L <br />0.000 <br />0.5 <br />ICV <br />mg/L <br />50.00 <br />107% <br />90-110 <br />CCB <br />mg/L <br />0.000 <br />0.5 <br />CCV <br />m <br />50.00 <br />107% <br />90-110 <br />MBAs <br />5540C <br />04/16/21:206003jba <br />CCB <br />mg/L <br />-0.0393 <br />0.25 <br />CCV <br />mg/L <br />1.000 <br />97.8% <br />90-110 <br />CCB <br />mg/L <br />-0.0393 <br />0.25 <br />CCV <br />I mg/L <br />1.000 <br />97.8% <br />1 90-110 <br />MBAs Extraction <br />5540C <br />04/16/21:204476jba <br />Blank <br />mg/L <br />ND <br /><0.I <br />LCS <br />mg/L <br />0.5000 <br />97.4% <br />86-114 <br />BS <br />mg/L <br />0.5000 <br />93.4% <br />86-114 <br />BSD <br />mg/L <br />0.5000 <br />96.3% <br />86-114 <br />BSRPD <br />EVL <br />0.5000 <br />0.015 <br /><0.1 <br />Definition <br />ICV : Initial Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br />ICB : Initial Calibration Blank - Analyzed to verify the instrument baseline is within criteria. <br />CCV : Continuing Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br />CCB : Continuing Calibration Blank - Analyzed to verify the instrument baseline is within criteria. <br />Blank : Method Blank - Prepared to verify that the preparation process is not contributing contamination to the samples. <br />LCS : Laboratory Control Standard/Sample - Prepared to verify that the preparation process is not affecting analyte recovery. <br />MS Matrix Spikes - A random sample is spiked with a known amount of analyte. The recoveries are an indication of how that sample <br />matrix affects analyte recovery. <br />MSD : Matrix Spike Duplicate of MS/MSD pair - A random sample duplicate is spiked with a known amount of analyte. The recoveries <br />are an indication of how that sample matrix affects analyte recovery. <br />BS : Blank Spikes - A blank is spiked with a known amount of analyte. It is prepared to verify that the preparation process is not <br />affecting analyte recovery. <br />Page 8 of 9 <br />