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April 27, 2022 Lab ID : STK2234796 <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 />Conc. <br />QC Data <br />DQO <br />Note <br />Wet Chem <br />Sulfate <br />300.0 <br />(STK2234796-001) <br />MSD <br />mg/L <br />100.0 <br />101% <br />82-124 <br />MSRPD <br />mg/L <br />10.00 <br />5.6% <br /><23 <br />300.0 <br />04/19/22:205691njb <br />ICB <br />mg/I <br />0.172 <br />0.5 <br />ICV <br />mg/1 <br />50.00 <br />101% <br />90-110 <br />CCB <br />mg/I <br />0.178 <br />0.5 <br />CCV <br />mg/I <br />50.00 <br />101% <br />90-110 <br />Nitrite as Nitrogen <br />450ONO2B <br />MS <br />mg/L <br />0.2284 <br />93.9% <br />1-173 <br />(STK2234792-001) <br />MSD <br />mg/L <br />0.2284 <br />87.0% <br />1-173 <br />MSRPD <br />0.2284 <br />0.016 <br /><0.1 <br />450ONO2B <br />04/12/22:205189AMM <br />CCV <br />-mg/L <br />mg/I <br />0.1523 <br />94.9% <br />90-110 <br />CCB <br />mg/I <br />-0.00153 <br />0.1 <br />CCV <br />mg/I <br />0.1523 <br />94.0% <br />90-110 <br />CCB <br />mg/I <br />1 -0.00153 <br />0.1 <br />Nitrate+ Nitrite as N <br />450ONO3F <br />04/12/22:204003vvh <br />Blank <br />mg/L <br />ND <br /><0.2 <br />LCS <br />mg/L <br />11.22 <br />99.2% <br />80-120 <br />MS <br />mg/L <br />5.609 <br />98.1% <br />5-285 <br />(SP 2205791-001) <br />MSD <br />mg/L <br />5.609 <br />101% <br />5-285 <br />MSRPD <br />mg/L <br />5.609 <br />2.1% <br /><30.4 <br />450ONO3F <br />04/12/22:205212vvh <br />CCB <br />mg/I <br />0.0530 <br />0.2 <br />CCV <br />mg/I <br />11.22 <br />99.7% <br />90-110 <br />CCB <br />mg/I <br />0.0590 <br />0.2 <br />CCV <br />mg/I <br />11.22 <br />99.5% <br />1 90-110 <br />Nitrate as NO3 <br />450ONO3F <br />04/12/22:204003vvh <br />Blank <br />m <br />ND <br /><0.9 <br />Nitrate Nitrogen <br />450ONO3F <br />04/12/22:204003vvh <br />Blank <br />mg/L <br />ND <br /><0.2 <br />MBAs <br />5540C <br />04/09/22:205054jba <br />CCB <br />mg/I <br />-0.0611 <br />0.25 <br />CCV <br />mg/I <br />1.000 <br />98.9% <br />90-110 <br />CCB <br />mg/I <br />-0.0568 <br />0.25 <br />CCV <br />mg/I <br />1.000 <br />100% <br />90-110 <br />MBAs Extraction <br />5540C <br />04/09/22:20391 ljba <br />Blank <br />mg/L <br />ND <br /><0.1 <br />LCS <br />mg/L <br />0.5000 <br />102% <br />86-114 <br />BS <br />mg/L <br />0.5000 <br />110% <br />86-114 <br />BSD <br />mg/L <br />0.5000 <br />109% <br />86-114 <br />BSRPD <br />mg/L <br />0.5000 <br />0.8% <br />1 <5 <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 />Matrix Spikes - A random sample is spiked with a known amount of analyte. The recoveries are an indication of how that sample <br />MS <br />matrix affects analyte recovery. <br />: Matrix Spike Duplicate of MS/MSD pair - A random sample duplicate is spiked with a known amount of analyte. The recoveries <br />MSD <br />are an indication of how that sample matrix affects analyte recovery. <br />: Blank Spikes - A blank is spiked with a known amount of analyte. It is prepared to verify that the preparation process is not <br />BS <br />affecting analyte recovery. <br />: Blank Spike Duplicate of BS/BSD pair - A blank duplicate is spiked with a known amount of analyte. It is prepared to verify that <br />BSD <br />the preparation process is not affecting analyte recovery. <br />: Duplicate Sample - A random sample with each batch is prepared and analyzed in duplicate. The relative percent difference is an <br />Dup <br />indication of precision for the preparation and analysis. <br />: MS/MSD Relative Percent Difference (RPD) - The MS relative percent difference is an indication of precision for the preparation <br />MSRPD <br />and analysis. <br />: BS/BSD Relative Percent Difference (RPD) - The BS relative percent difference is an indication of precision for the preparation <br />BSRPD <br />and analysis. <br />Page 8 of 9 <br />