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April 01, 2004 Lab ID STK431883 <br /> Ground Zero Analysis Customer 3-14996 <br /> Quality Control - Organic <br /> Explanations <br /> 360 CCV above Acceptance Range (AR) Samples which were non detect for dits analyte were accepted <br /> 410 Relanve Percent Difference (RPD) not within Maximum Allowable Value (MAV) Data was accepted <br /> based on the LCS or CCV recovery <br /> 435 Sample matrix may be affecting this analyte Data was accepted based on the LCS or CCV recovery <br /> Defuutions <br /> Blank Method Blank - Prepared to verify that the preparation process is not contributing contamination to the samples <br /> BS/BSD Blank Spikes - A blank is spiked with a known amount of analyte It is prepared to verify that the preparation <br /> process is not affecting analyte recovery <br /> CCV Continuing Calibration Venficanon - Analyzed to venfy the instrument calibration is within criteria <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 quality control data is compared <br /> STK431883 Quality Control Page 9 <br />