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October 21, 2004 Lab ID STK436814 <br /> Micheline Doyle Kipf Customer 3-14626 <br /> Quality Control - Organic <br /> Explanations <br /> 360 CCV above Acceptance Range (AR) Samples which were non detect for this analyte were accepted <br /> 410 Relative 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 /> Defitutions <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 /> PDS Post Digestion Spike (ICP/GFAA) <br /> MS/MSD Matrix Spikes - A random sample is spiked with a known amount of analyte The recoveries are an indication o <br /> how that sample matrix affects analyte recovery <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 /> Dup Duplicate Sample - A random sample with each batch is prepared and analyzed to duplicate The relative percent <br /> difference is an indication of precision for the preparation and analysts <br /> MDL Method Detection Level <br /> CCV Continuing Calibration Verification - Analyzed to verify 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 /> i <br /> STK436814 Duality Control Page 19 <br />