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December 17, 2012 Lab ID : STK1251067 <br /> San Joaquin County PWD-Solid Waste Div. Customer : 3-2956 <br /> Quality Control- Inorganic <br /> Constituent Method Date/ID Type Units Conc. QC Data DQO Note <br /> Wet Chem <br /> OD 5220B 12110/12:213655MCA L.CS mg/L 200.0 77.0% 73-84 <br /> MS mg/L 200.0 66.7% 43-142 <br /> (STK1251099-005) MSD mg/L 200.0 71.5% 43-142 <br /> MSRPD m 200.0 5.0% S15 <br /> 5220D 12110/12:218101MCA CCB mg/L 8.3 20 <br /> CCV mg/L. 200.0 69.9% 61-94 <br /> CCB mg/L 11.5 20 <br /> CCV m 200.0 73.1% 61-94 <br /> Definition <br /> PDS :PDS failed,matrix-Post Digestion Spike(PDS)not within Acceptance Range(AR)because of matrix interferences affecting this <br /> analyte. <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 /> L.CS :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 /> Duplicate Sample-A random sample with each batch is prepared and analyzed in duplicate.The relative percent difference is an <br /> p 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 qu!ytj control data is compared. <br /> Page 10 of 21 <br />