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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: 08/06/2007 <br />Sample Matrix: Water Date Analyzed: 08/15/2007 - <br />08/28/2007 <br />Lab Control Spike/Duplicate Lab Control Spike Summary <br />Semi -Volatile Organic Compounds by GC/MS <br />Extraction Method: <br />EPA 3520C <br />Units: ug/L <br />Analysis Method: <br />8270C <br />Basis: NA <br />Level: Low <br />Extraction Lot: KWG0708458 <br />Lab Control Sample <br />Duplicate Lab Control Sample <br />KWG0708458-6 <br />KWG0708458-7 <br />Lab Control Spike <br />Duplicate Lab Control Spike <br />o/®Ree RPD <br />Analyte Name <br />Result Expected %Ree <br />Result Expected %Rec <br />Limits RPD Limit <br />p-Phenylenediamine ND 400 0 * 93.4 400 23 * 70-130 30 <br />Famphur 68.3 100 68 * 27.6 100 28 * 70-130 85 * 30 <br />Kepone 59.2 100 59 20.1 100 20 10-149 99 * 30 <br />Results Ragged with an asterisk (") indicate values outside control criteria. <br />Percent recoveries and relative percent differences (RPD) ace detemvned by the software using values in the calculation which have not been rounded. <br />112 C.0 <br />Printed: 08/30/2007 14:43:09 Form 3C - Organic Page I of l <br />u:VSteatth\Crystai,rpt\Fonn3DLC.rpt Superset Reference: RR76030 <br />