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April 12, 2007 Lab ID : STK732856 <br /> Chesney Consulting Customer : 3-15419 <br /> Quality Control - Organic <br /> Constituent Method Date/ID Type Units Conc. QC Data DQO No[e <br /> DBCP 504.1 03/30/2007:A203 Blank ug/L ND <(l of <br /> LCS ug/L 0.2949 112% 70-130 <br /> BS ug/L 0.2949 115% 70-130 <br /> BSD ug/L 0.2949 115% 70-130 <br /> BSRPD ug/L 0.59F c-30 <br /> 504.1 03/30/2007:A 00-CCV ug/L 5.000 110% 70-130 <br /> 1.3 Di6rmnupo,air-Surrogate 504.1 03/30/2007:A203 Blank ug/L 0.5868 110% 70-130 <br /> LCS ug/L 0.5868 112% 70-130 <br /> BS ug/L 0.5868 112% 70-130 <br /> BSD ug/L 0.5868 115% 70-130 <br /> BSRPD ug/L 2.2% <30 560 <br /> 504.1 03/3012007:A 00-CCV ug/L 9.975 112% 70-130 <br /> Eaplanaliotu <br /> 560 Surrogate percent recoveries not within the Acceptance Range (AR) due to suspected matrix interferences. <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 analyse. 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. h is prepared to verify that the preparation <br /> process is not affecting analyte recovery. <br /> ICB Initial Calibration Blank - Analyzed to verify the Instrument baseline is within criteria. <br /> ICV Initial Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br /> CCB Continuing Calibration Blank - Analyzed to verify the instrument beeline is within criteria. <br /> CCV Continuing Calibration Verification - Analyzed in verify the instrument calibration is within criteria. <br /> YD 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 /> STK732856: Quality Control Page 2 <br />