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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 />Lab Control Spike Summary <br />Volatile Organic Compounds <br />Service Request: P0700346 <br />Date Extracted: 04/10/2007 <br />Date Analyzed: 04/10/2007 <br />11 <br />J <br />Extraction Method: <br />EPA 5030B <br />Units: <br />ug/L <br />Analysis Method: <br />8260B <br />Basis: <br />NA <br />Level: <br />Low <br />Extraction Lot: <br />PWG0700554' <br />Lab Control Sample <br />PWG0700554-3 <br />Lab Control Spike. %Rec <br />Analyte Name <br />Result Expected %oRec Limits <br />Acetone <br />51.3 50.0 103 71-122 <br />11 <br />7 <br />Results flagged with an asterisk (") indicate values outside control criteria. <br />Percent recoveries and relative percent differences (RPD) are determined by the software using values in the calculation which have not been rounded. <br />13 <br />Printed: 04/13/2007 15:48:21 Form 3C - Organic Page 1 of <br />P:\.STEALTH\CRYSTAL.RPT\Fomi3LCS.rpt Superset Reference: RR13523 <br />