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July 29, 2003 <br />Chuck Hartman <br />Quality Control - Organic <br />Lab ID : STK333648 <br />Customer: 3-15039 <br />Constituent <br />Method <br />Date/ID <br />Type <br />Units <br />Cone. <br />QC Data <br />DQO <br />Note <br />Toluene <br />8260B <br />06/27/2003:A <br />00-CCV <br />ug/L <br />50.00 <br />94.9% <br />80-120 <br />Toluene -d8 -Surrogate <br />5030B <br />06/27/2003:A233 <br />Blank <br />ug/kg <br />25.00 <br />97.8% <br />30-151 <br />LCS <br />ug/kg <br />25.00 <br />97.9% <br />30-151 <br />MS <br />ug/kg <br />25.00 <br />99.6% <br />30-151 <br />(SP 306728-02) <br />MSD <br />ug/kg <br />25.00 <br />97.2% <br />30-151 <br />8260B <br />06/27/2003:A <br />01-CCV <br />ug/L <br />25.00 <br />101% <br />70-130 <br />Xylenes m,p <br />5030B <br />06/27/2003:A233 <br />Blank <br />ug/kg <br />ND <br /><5 <br />8260B <br />06/27/2003:A <br />00-CCV <br />ug/L <br />100.0 <br />103% <br />70-130 <br />Derinitions <br />Blank <br />Method Blank - Prepared to verify that the preparation process is not <br />contributing <br />contamination to the samples. <br />LCS <br />Laboratory Control Standard/Sample - Prepared to <br />verify that the preparation process <br />is not affecting analyte <br />recovery. <br />PDS <br />Post Digestion Spike (ICP/GFAA) <br />MS/MSD <br />Matrix Spikes - A random sample is spiked with <br />a known amount of <br />analyte. The recoveries are an indication o <br />how that sample matrix affects analyte recovery. <br />CCB <br />Continuing Calibration Blank - Analyzed to verify <br />the instrument baseline is within <br />criteria. <br />CCV <br />Continuing Calibration Verification - Analyzed to verify the <br />instrument calibration <br />is <br />within criteria. <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 <br />the quality <br />control data <br />is compared. <br />STK333648: Quality Control Page 7 <br />