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November 24, 2021 Lab ID : STK2155807 <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 />Nitrite <br />300.0 <br />11103/21:212758NJB <br />LCS <br />mg/L <br />15.00 <br />105% <br />90-110 <br />MS <br />mg/L <br />30.00 <br />103% <br />74-126 <br />(CC 2183799-006) <br />MSD <br />mg(L <br />30.00 <br />111 % <br />74-126 <br />MSRPD <br />mg/L <br />10.00 <br />7.0% <br /><20 <br />300.0 <br />11/04/21:217270njb <br />CCB <br />mg/1 <br />0.00 <br />0.5 <br />CCV <br />mg/I <br />15.00 <br />107% <br />90-110 <br />CCB <br />mg/I <br />0.00 <br />0.5 <br />CCV <br />mg/I <br />15.00 <br />107% <br />90-110 <br />Nitrite Nitro en <br />+00.0 <br />11/03/21:212758NJB <br />Blank <br />m <br />ND <br /><0.2 <br />Sulfate <br />300.0 <br />11/03/21:212758NJB <br />Blank <br />mg/L <br />ND <br /><0.5 <br />LCS <br />mg/L <br />50.00 <br />106% <br />90-110 <br />MS <br />mg/L <br />100.0 <br />92.5% <br />82-124 <br />(CC 2183799-006) <br />MSD <br />mg/L <br />100.0 <br />98.8% <br />82-124 <br />MSRPD <br />m <br />10.00 <br />3.6% <br /><23 <br />300.0 <br />11/04/21:217270njb <br />CCB <br />mg/1 <br />0.144 <br />0.5 <br />CCV <br />mg/I <br />50.00 <br />108% <br />90-110 <br />CCB <br />mg/I <br />0.225 <br />0.5 <br />CCV <br />m <br />50.00 <br />108% <br />90-110 <br />AS <br />5540C <br />11/04/21:217347jba <br />CCB <br />mg/1 <br />-0.0611 <br />0.25 <br />CCV <br />mg/1 <br />1.000 <br />106% <br />90-110 <br />CCB <br />mg/1 <br />-0.0611 <br />0.25 <br />CCV <br />m <br />1.000 <br />106% <br />90-110 <br />BAs Extraction <br />5540C <br />11/04/21:212949jba <br />Blank <br />mg/L <br />ND <br /><0.1 <br />LCS <br />mg/L <br />0.5000 <br />105% <br />86-114 <br />MS <br />mg/L <br />0.5000 <br />98.0% <br />86-114 <br />(SP 2115676-00 1) <br />MSD <br />mg/L <br />0.5000 <br />98.9% <br />86-114 <br />MSRPD <br />m <br />0.5000 <br />0.9% <br /><5 <br />Definition <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 />: 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 />MSRPD : MS/MSD Relative Percent Difference (RPD) - The MS relative percent difference is an indication of precision for the preparation <br />and analysis. <br />ND : Non -detect - Result was below the DQO listed for the analyte. <br />DQO : Data Quality Objective - This is the criteria against which the quality control data is compared. <br />Page 8 of 8 <br />