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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client: Shaw Environmental & Infrastructure, Inc <br />,Project: Foothill Landfill, San Joaquin County/124591 (Resample) <br />Sample Matrix: Water <br />Name <br />Sample <br />Result <br />Matrix Spike/Duplicate Matrix Spike Summary <br />Volatile Organic Compounds <br />Service Request: P0700346 <br />Date Extracted: 04/10/2007 <br />Date Analyzed: 04/10/2007 <br />Units: <br />ug/L <br />1 <br />NA <br />Level: <br />Low <br />kS-ample Name: <br />Batch QC <br />ab Code: <br />P0700348=001 <br />extraction Method: <br />EPA 5030B <br />Analysis Method: <br />8260B <br />Name <br />Sample <br />Result <br />Matrix Spike/Duplicate Matrix Spike Summary <br />Volatile Organic Compounds <br />Service Request: P0700346 <br />Date Extracted: 04/10/2007 <br />Date Analyzed: 04/10/2007 <br />Units: <br />ug/L <br />Basis: <br />NA <br />Level: <br />Low <br />Extraction Lot: <br />PWG0700554 <br />Batch QCMS Batch QCDMS <br />PWG0700554-1 PWG0700554-2 <br />Matrix Spike Duplicate Matrix Spike %Rec RPD <br />Result Expected %Rec Result Expected %Rec Limits RPD Limit <br />2.4 47.2 50.0 90 47.9 50.0 91 61-139 2 25 <br />Results flagged with an asterisk (*) indicate values outside control criteria. <br />esults flagged with a pound (#) indicate the control criteria is not applicable. <br />ercent recoveries and relative percent differences (RPD) are determined by the software usina s in the calculation which have not been rounded. <br />ranted: 04/13/2007 15:48:18 Form 3A - Organic Page 1 of 1 <br />\STEALTMCRYSTAL.RPT\Fomi3DMS.tpt Superset Reference: RR13523 <br />