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j Sequoia 1455 McDowell Blvd North Ste <br /> Petaluma CA 949544 <br /> Anal tical (707)792-1865 <br /> ' Y FAX equoi labs c 42 <br /> www sequoialabs com <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P403078 <br /> 3017 Kilgare Road Suite 100 Project Number 38984 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 03/19/04 15 02 <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 4030175-EPA 5030B,waters <br /> Matrix Spike Du 4030175-MSDI Source P403052-01 Pre aced&Analyzed 03/08/04 <br /> Gasoline Range Organics(C6-C 10) 2130 50 u911 2750 13 77 65 135 4 20 <br /> Surrogate 4-Bromofluorobenzene 297 300 99 65-135 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed to accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 11 of 23 <br />