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1455 McDowell Blvd North Ste D <br /> a_ �— Sequoia Petaluma,CA 94954 <br /> (707)792-1965 <br /> TWO Analytical FAX(707)792-0342 <br /> anew sequoiaiabs com <br /> URS Corp-Sacramento Project Arco Site 6100,Tracy,CA P404510 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36619 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 05/05/04 18 51 <br /> Purgeable Hydrocarbons by EPA 8015B - 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 4040725- EPA 5030,soils <br /> Matrix Spike Dup(4040725-MSD1) Source P404367-05 Prepared&Analyzed 04/28/04 <br /> Gasoline Range Organics(C4-C 12) 425 10 mg/kg 550 ND 77 65-135 17 20 <br /> Surrogate 4-Bromofluorobenzene 0 243 0 300 81 65-135 <br /> iota 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 12 of 17 <br />