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March 16, 2022 Lab ID : STK2232360 <br />San Joaquin Co. Environmental Health Dep Customer :3-17919 <br />Quality Control - Inorganic <br />Constituent <br />Method <br />Date/1D <br />Type <br />Units <br />Cone. <br />QC Data <br />DQO <br />Note <br />Wet Chem <br />Nitrate <br />300.0 <br />(CH 2270853-001) <br />MSD <br />mg/L <br />40.00 <br />99.2% <br />85419 <br />MSRPD <br />m <br />10.00 <br />1.9% <br /><19 <br />300.0 <br />02/16/22:202433njb <br />CCB <br />mg/l <br />0.00 <br />0.5 <br />CCV <br />mg/l <br />20.00 <br />104% <br />90-110 <br />CCB <br />mg/1 <br />0.00 <br />0.5 <br />CCV <br />mg/I <br />20.00 <br />105% <br />90-110 <br />itrate + Nitrite as N <br />300.0 <br />02/16/22:201797NJB <br />Blank <br />m <br />ND <br /><0.1 <br />Nitrate Nitrogen <br />300.0 <br />02/16/22:201797NJB <br />Blank <br />m <br />ND <br /><0.1 <br />itrite <br />300.0 <br />02116/22:201797NJB <br />Blank <br />mg/L <br />ND <br /><0.5 <br />LCS <br />mg/L <br />15.00 <br />105% <br />90-110 <br />MS <br />mg/L <br />30.00 <br />99.6% <br />74-126 <br />(CH 2270794-001) <br />MSD <br />mg/L <br />30.00 <br />103% <br />74-126 <br />MSRPD <br />mg/L <br />10.00 <br />3.2% <br />:520 <br />MS <br />mg/L <br />30.00 <br />102% <br />74-126 <br />(CH 2270853-001) <br />MSD <br />mg/L <br />30.00 <br />105% <br />74-126 <br />MSRPD <br />mg/L <br />10.00 <br />2.3% <br /><20 <br />300.0 <br />02/16/22:202433njb <br />CCB <br />mg/1 <br />0.00 <br />0.5 <br />CCV <br />Ing/1 <br />15.00 <br />108% <br />90-110 <br />CCB <br />mg/1 <br />0.00 <br />0.5 <br />CCV <br />m 1 <br />15.00 <br />107% <br />90-110 <br />Nitrite Nitrogen <br />300.0 <br />02/16/22:201797NJB <br />Blank <br />m > <br />ND <br /><0.2 <br />Sulfate <br />300.0 <br />02/16/22:201797NJB <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 />102% <br />82-124 <br />(CH 2270794-001) <br />MSD <br />mg/L <br />100.0 <br />105% <br />82-124 <br />MSRPD <br />mg/L <br />10.00 <br />3.2% <br />:523 <br />MS <br />mg/L <br />100.0 <br />101% <br />82-124 <br />(CH 2270853-001) <br />MSD <br />mg/L <br />100.0 <br />104% <br />82-124 <br />MSRPD <br />mg/L <br />10.00 <br />2.3% <br />523 <br />300.0 <br />02/16/22:202433njb <br />CCB <br />mg/1 <br />0.0860 <br />0.5 <br />CCV <br />mg/1 <br />50.00 <br />109% <br />90-110 <br />CCB <br />mg/I <br />0.0820 <br />0.5 <br />CCV <br />mg/I <br />50.00 <br />109% <br />90-110 <br />H <br />4500-H B <br />STK2231981-001 <br />Dup <br />units <br />0.4% <br />4.80 <br />4500HB <br />02/18/22:202528jba <br />CCV <br />units <br />8.000 <br />100% <br />95-105 <br />CCV <br />units <br />8.000 <br />102% <br />95-105 <br />BAS <br />5540C <br />02/16/22:202595jba <br />CCB <br />mg/1 <br />-0.0568 <br />0.25 <br />CCV <br />mg/1 <br />1.000 <br />95.0% <br />90-110 <br />CCB <br />mg/I <br />-0.0568 <br />0.25 <br />CCV <br />mg/I <br />1.000 1 <br />95.4% <br />90-110 <br />BAS Extraction <br />5540C <br />02/16/22:201970jba <br />Blank <br />mg/L <br />ND <br /><0.1 <br />LCS <br />mg/L <br />0.5000 <br />95.0% <br />86-114 <br />BS <br />mg/L <br />0.5000 <br />93.7% <br />86-114 <br />BSD <br />mg/L <br />0.5000 <br />97.6% <br />86-114 <br />BSRPD <br />m <br />0.5000 <br />4.1% <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 />Page 8 of 9 <br />