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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client: Shaw Environmental & infrastructure, Inc Service Request: P0700704 <br />Project: Foothill Landfill, San Joaquin County (New Wells)/124591 Date Extracted: 08/07/2007 <br />Sample Matrix: Water Date Analyzed: 08/13/2007 <br />Lab Control Spike/Duplicate Lab Control Spike Summary <br />Polychlorinated Biphenyls (PCBs) <br />Extraction Method: EPA 3535 Units: ug/L <br />Analysis Method: 8082 Basis: NA <br />Level: Low <br />Extraction Lot: KWG0708499 <br />Lab Control Sample <br />Duplicate Lab Control Sample <br />KWG0708499-1 <br />KWG0708499-2 <br />Lab Control Spike <br />Duplicate Lab Control Spike <br />%Rec <br />RFD <br />Analyte Name Result Expected a/®Rec <br />Result Expected °/aRec <br />Limits RPD <br />Limit <br />Aroclor 1016 1.36 2.00 68 <br />1.32 2.00 66 <br />30-113 3 <br />30 <br />Aroclor 1260 1.58 2.00 79 <br />1.57 2.00 78 <br />42-110 1 <br />30 <br />Results (fagged with an asterisk (") indicate values outside control criteria. <br />Petoent recoveries and relative percent differences (RPD) are detartnined by the software using values in the calculation which have not been rounded. <br />86 <br />Printed: 08/15/2007 15:48:59 Form 3C - Organic <br />u:\Steft\Crystal.rpt\Fcm3DLC.rpt SuperSet Reference: RR75431 <br />L <br />00056 <br />Page 1 of 1 <br />I <br />i <br />