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L <br /> September 26, 2007 Lab ID STK738312 <br /> Kleinfelder Inc. Customer : 3-2703 <br /> Quality Control - Organic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> DBCP 504.1 09/08/2007:A203 Blank ug/L NO <0.01 <br /> LCS ug/L 0.2949 99.3% 70-130 <br /> BS ug/L 0.2949 ' 107% 70-130 <br /> BSD ug/L 0.2949 106% 70-130 <br /> tt BSRPD ug/L 1.1% <30 <br /> [ 504.1 09/08/2007:A 00-CCV ug/L 5.000 100% 70-130 <br /> 1,3-Uibromopropane-Surrogate 504.1 09/08/2007:A2U3 Blank u.-/L 0.5868 113% 70-130 <br /> LCS ug/L 0.5868 107% 70430 <br /> BS ug/L 0.5868 111% 70-130 <br /> BSD ug/L 0.5868 111% 70-130 <br /> 504.1 09/08/2007:A 00-CCV i ug/L i 9.975 i 109% i 70-130 <br /> Definitions <br /> Blank Method Blank - Prepared in 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 /> L <br /> recovery. <br /> rrixS <br /> MS/MSD Nla[rix Spikes - A random sample is spiked with a known amount of anatyte. The recoveries are an indication o <br /> how that sample marrix 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 /> L ICB Initial Calibradon 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 baseline is within criteria. <br /> CCV Continuing Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br /> L ND Non-detect - Result was below the DQO listed for the analyte. <br /> DQO Dam Quality Objective - This is the criteria against which the quality control data is compared. <br /> L <br /> L <br /> r <br /> LSTK738312: Quality Control Page 2 <br /> L <br />