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January 28, 2019 Lab ID : STK193O714 <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 />Nitrate <br />300.0 <br />01/15/19:200761MCA <br />MSRPD <br />mg/L <br />10.00 <br />0.3% <br /><19 <br />MS <br />mg/L <br />40.00 <br />101% <br />85-119 <br />(SP 1900623-001) <br />MSD <br />mg/L <br />40.00 <br />102% <br />85-119 <br />MSRPD <br />mg/L <br />10.00 <br />0.8% <br /><19 <br />(SP 1900623-001) <br />Dup <br />m <br />0.0 <br />0.4 <br />300.0 <br />01/15/19:201007MCA <br />CCB <br />mg/L <br />0.000 <br />0.5 <br />CCV <br />mg/L <br />20.00 <br />102% <br />90-110 <br />CCB <br />mg/L <br />0.000 <br />0.5 <br />CCV <br />mg/L <br />20.00 <br />101% <br />1 90-110 <br />Nitrate +Nitrite as N <br />300.0 <br />01/15/19:200761MCA <br />Blank <br />m <br />ND <br /><0.1 <br />Nitrate Nitrogen <br />300.0 <br />01/15/19:200761MCA <br />Blank <br />m <br />ND <br /><0.1 <br />Nitrite <br />300.0 <br />01/15/19:200761MCA <br />Blank <br />mg/L <br />ND <br /><0.5 <br />LES <br />mg/L <br />15.00 <br />103% <br />90-110 <br />MS <br />mg/L <br />30.00 <br />96.7% <br />74-126 <br />(SP 1900622-001) <br />MSD <br />mg/L <br />30.00 <br />96.1 % <br />74-126 <br />MSRPD <br />mg/L <br />10.00 <br />0.6% <br /><20 <br />MS <br />mg/L <br />30.00 <br />96.5% <br />74-126 <br />(SP 1900623-001) <br />MSD <br />mg/L <br />30.00 <br />103% <br />74-126 <br />MSRPD <br />mg/L <br />10.00 <br />7.0% <br /><20 <br />(SP 1900623-001) <br />Dup <br />mg1L <br />0.0 <br />0.5 <br />300.0 <br />01/15/19:201007MCA <br />CCB <br />mg/L <br />0.000 <br />0.5 <br />CCV <br />mg/L <br />15.00 <br />105% <br />90-110 <br />CCB <br />mg/L <br />0.000 <br />0.5 <br />CCV <br />mg/L <br />15.00 <br />105% <br />90-110 <br />Nitrite Nitrogen <br />300.0 <br />01/15/19:200761MC7 <br />Blank <br />mg/L <br />ND <br /><0.2 <br />Sulfate <br />300.0 <br />01/15/19:200761MCA <br />Blank <br />mg/L <br />ND <br /><0.5 <br />LCS <br />mg/L <br />50.00 <br />100% <br />90-110 <br />MS <br />mg/L <br />100.0 <br />78.3% <br />82-124 <br />435 <br />(SP 1900622-001) <br />MSD <br />mg/L <br />100.0 <br />78.2% <br />82-124 <br />435 <br />MSRPD <br />mg/L <br />10.00 <br />0.03% <br /><23 <br />MS <br />mg/L <br />100.0 <br />65.8% <br />82-124 <br />435 <br />(SP 1900623-001) <br />MSD <br />mg/L <br />100.0 <br />66.4% <br />82-124 <br />435 <br />MSRPD <br />mg/L <br />10.00 <br />0.2% <br /><23 <br />(SP 1900623-001) <br />Dup <br />mg/L <br />0.5% <br />23 <br />300.0 <br />O1/15/19:201007MCA <br />CCB <br />mg/L <br />0.000 <br />0.5 <br />CCV <br />mg/L <br />50.00 <br />102% <br />90-110 <br />CCB <br />mg/L <br />0.242 <br />0.5 <br />CCV <br />-9/1- <br />50.00 <br />102% <br />90-110 <br />BAS <br />5540C <br />O1/16/19:200728img <br />CCB <br />mg/L <br />0.000 <br />0.1 <br />CCV <br />m <br />0.1000 <br />100% <br />99-101 <br />BAS Screen <br />5540C <br />MS <br />mg/L <br />0.1000 <br />100% <br />90-110 <br />(CH 1970435-001) <br />MSD <br />mg/L <br />0.1000 <br />100% <br />90-110 <br />MSRPD <br />m <br />0.1000 1 <br />0.0 <br /><0.1 <br />Definition <br />ICB : htitial 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 analyted. The recoveries <br />are an indication of how that sample matrix affects analyte recovery. <br />Dup : Duplicate Sample - A random sample with each batch is prepared and analyzed in duplicate. The relative percent difference is an <br />indication of precision for the preparation and analysis. <br />Page 8 of 9 <br />