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June 10, 2005 Lab ID STK533708 <br /> Attn: Jay Khalsa Customer : 3-15593 <br /> Quality Control - Organic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> DBCP 05/30/2005:A203 Blank ug/L NO <0.01 <br /> LCS ug/L 0.2949 98.1% 70-130 <br /> BS ug/1- 0.2949 104% 70-130 <br /> BSD ug/L 0.2949 106% 70-130 <br /> BSRPD ug/L 1.7% <30 <br /> 1.3-Dibromopropane-Surrogate Blank ug/L <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 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 /> CCB Continuing Calibration Blank - Analyzed to verify the instrument baseline is within criteria. <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 Dara Quality Objective - This is the criteria against which the quality control data is compared. <br /> STK533708: Quality Control Page 2 <br />