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March 27, 2002 Lab ID STK230942 <br /> Environmental Audit, Inc. Customer : 3-14147 <br /> Quality Control - Organic <br /> Explanations <br /> Definitions <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 <br /> recovery. <br /> MS/MSD Matrix Spikes - A random sample is spiked with a known amount of analyte. The recoveries are an indication at <br /> how that sample matrix affects analyte recovery. <br /> CCV Continuing Calibration Verification Analyzed to verity the instrument calibration is within criteria. <br /> ND Non-detect - Result wax below the DQO listed for the analyte. <br /> DQO Dim Quality Objective - This is the criteria against which the quality control data is compared. <br /> STK230942: Quality Control Page 5 <br />