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Sequoia 3455 McDowell Blvd Ste D <br /> Petaluma,,CA CA 94954 <br /> (707)792-I865 <br /> Analytical FAX(707)792 0342 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project Arco Site 2093,Tracy,CA P403320 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intnm-50265 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 04/05/04 11 06 <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 Nous <br /> Batch 4030627-EPA 5030B,waters <br /> Matrix Spike Du (4030627-MSDI) Source P403261-04 Prepared&Analyzed 03/22/04 <br /> Gasoline Range Organics(C6-C 10) 2320 50 ug/I 2750 13 84 65-135 09 20 <br /> Surrogate 4-Bromofluorobenzene 302 300 101 65-135 <br /> uoia 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 15 of 16 <br />