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• <br /> a)— (707) <br /> 1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> 792-1865 <br /> i1WAnalytical FAX(707)792-0342 <br /> www.sequoialabs.com <br /> URS Corp-Sacramento Project: Arco Site 760,Lodi,CA P304288 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number: WR36622 Reported: <br /> Sacramento CA,95833 Project Manager: Vernon P.E1arth 04/25/03 17:11 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015B/8021B- Quality Control <br /> Sequoia Analytical-Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3040377-EPA 5030,waters <br /> Matrix Spike Dup(3040377-MSD1) Source:P304218-06 Prepared&Analyzed:04/16/03 <br /> Surrogate:a,a,a-Trifluorotoluene 343 u9/1 300 114 65-135 <br /> Surrogate:4-Bromofluorobenzene 267 11300 89 65-135 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 6 of 8 <br />