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' 1455 McDowell Blvd,North Ste D <br /> j Sequoia Petaluma,CA 94954 <br /> (707)792 1865 i <br /> Analytical FAX(707)792-0342om <br /> www sequoialabs com <br /> 1 URS Corp-Sacramento Project Arco Site 6020,Manteca,CA P307347 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36616 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 07/30/03 17 32 <br /> Total Petroleum Hydrocarbons as Gasoline by EPA 8015B- Quality Control <br /> Sequoia Analytical - Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Llma Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3070525-EPA 5030,soils <br /> Matrix Spike Dup(3070525-MSD]) Source P307417-01 Prepared&Analyzed 07/24/03 <br /> Gasoline Range Organics 208 10 mg/kg 275 0 022 75 65-135 4 20 <br /> Surrogate 4-Bromofluorobenzene 0 314 0 300 105 65-135 <br /> 1 <br /> 1 <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 analyhcal report must be reproduced in its entirety <br /> Page 9 of 13 <br />