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1455 McDowe <br /> Sequoia Petaluma CA 94954ll Blvd,North Ste 4 <br /> Analytical (707)792-1865):AX(707)792 0342342 <br /> qW <br /> www sequoialabs coo <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P401156 <br /> 3017 Kilgare Road Suite 100 Project Number 38984 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 01/27/04 15 26 <br /> Purgeable Hydrocarbons by EPA 8015B - Quality Control <br /> Sequoia Analytical- Petaluma <br /> Reporting Spike Source %REC RPU <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4010216-EPA 5030B,waters <br /> Blank 4010216-11LKI Prepared&Anal zed 01/14/04 <br /> Gasoline Range Organics ND 50 USA <br /> Surrogate 4-Bromofluorobenzene 283 300 94 65-135 <br /> Laborattia Control Sample(4010216-BSI) -Prepared&Analyzed 01/14/04 <br /> Gasoline Range Organics 2300 50 ug/1 2750 84 65 135 <br /> Surrogate 4-Bromofluorobenzene 299 300 100 65-135 <br /> Matrix Spike(4010216-MSI) Source P401074-04 Prepared&Analyzed 01/14/04 <br /> Gasoline Range Organics 2210 50 ug/1 2750 21 80 65-135 <br /> Surrogate 4-Bromofluorobenzene 289 300 96 65-135 <br /> Matrix Spike Du 4010216-MSDI Source P401074-04 Prepared&Analyzed 01/14/04 <br /> Gasoline Range Organics 2220 50 ug/1 2750 21 80 65-135 05 20 • <br /> Surrogate 4-Bromofluorobenzene 285 300 95 65-135 <br /> Sequoia 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 /> basis This analytical report must be reproduced in its entirety <br /> Page 10 of 16 <br />