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IA551cDowell lNorth Ste D <br /> (D— Sequoia Petaluma CA 94954 <br /> {707}1921865 <br /> Analytical <br /> FAX{70 7}792 0342 <br /> www sequoialabs c� <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P310580 <br /> 3017 Kilgare Road Suite 100 Project Number 38984 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 11/06/03 18 54 <br /> Purgeable Hydrocarbons by EPA 8015B - Quality Control <br /> Sequoia Analytical -Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Rcsult %REC Limits RPD Limit Notes <br /> Batch 3110025-EPA 5030,waters <br /> Blank(3110025-BLKI) Prepared&Analyzed 11/03/03 <br /> Gasoline Range Organics ND 50 ug/l <br /> Surrogate 4 Bromofluorobenzene 287 300 96 65-135 <br /> Laboratory Control Sample(3110025-BSI) Prepared&Analyzed 11/03/03 <br /> Gasoline Range Organics 2350 50 ug/l 2750 85 65-135 <br /> Surrogate 4-Bromofluorobenzene 303 " 300 101 65-135 <br /> Matrix Spike(3110025-MSI) Source P310534-01 Prepared&Analyzed 11/03/03 <br /> Gasolme Range Organics 2370 50 ugA 2750 21 85 65-135 <br /> Surrogate 4-Bromofluorobemene 300 300 100 65-135 <br /> Matra Spike Dup(3110025-MSDI) Source P310534-01 Prepared&Analyzed 11/03/03 <br /> Gasoline Range Organics 2340 50 u9A 2750 21 84 65-135 1 20 <br /> Surrogate 4-Bromofluorobenzene 301 300 100 65-135 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated resulrs are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 10 of 19 <br />