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April 17, 2013 Lab ID : STK1332913 <br />San Joaquin County PWD -Solid Waste Div. Customer : 3-2956 <br />Quality Control - Organic <br />Constituent <br />Method Date/ID Type Units Conc. QC Data DQO Note <br />Organic <br />Vinyl Acetate <br />8260B 04/08/13:204988SBL CCV ug/L 40.02 68.8% 50-150 <br />Vinyl Chloride <br />8260E 04/08/13:204988SBL CCV ug/L 25.00 104% 80-120 <br />ylene m,p <br />8260B I 04/08/13:204988SBL I CCV u L 50.00 104% 70-130 <br />lenes o <br />I 8260B 04/08/13:204988SBL I CCV ugIL 1 25.00 100% 1 70-130 <br />Definition <br />CCV <br />: Continuing Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br />Blank <br />: Method Blank - Prepared to verify that the preparation process is not contributing contamination to the samples. <br />LCS <br />: 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 bow 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 analyted. The recoveries <br />MSD <br />are an indication of bow 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 />: 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 />: BSBSD Relative Percent Difference (RPD) - The BS relative percent difference is an indication of precision for the preparation <br />BSRPD <br />and analysis. <br />ND <br />: Non -detect - Result was below the DQO listed for the analyte. <br />DQO <br />: Data Quality Objective - This is the criteria against which the quality control data is compared <br />Explanation <br />325 <br />: LCS not within Acceptance Range (AR). Data could not be confirmed by reanalysis. Use results with discretion. <br />360 <br />: CCV above Acceptance Range (AR). Samples which were non detect for this analyte were accepted. <br />435 <br />: Sample matrix may be affecting this analyte, Data was accepted based on the LCS or CCV recovery. <br />Page 21 of 21 <br />