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1455 McDowell Blvd North Ste D <br /> Sequoia Petaluma CA 94954 <br /> ,!Z� (707)792-1865 <br /> 'WrAnalytical FAX(707)792-0342 <br /> Analytical <br /> www sequoialabs com <br /> Ib <br /> URS Corp-Sacramento Project Arco Site 6100,Tracy,CA P402493 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36619 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 03/17/04 15 30 <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 4020620-EPA 5030,soils <br /> Matrix Spike Dup(4020620-MSD1) Source P402493-01 Prepared&Analyzed 02/27/04 <br /> Gasoline Range Organics 3 12 10 mg/kg 2 75 0 18 107 65-135 45 20 QC21 <br /> Surrogate 4-Bromofluorobenzene 0 285 0 300 95 65-135 <br /> ola Analytical -Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> bases This analytical report must be reproduced in its entirety <br /> Page 13 of 25 <br />