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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> 1865 <br /> Analytical <br /> a— ) (707)792- <br /> FAX(707)792-0342342 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project BP Heritage Site 11191,Stockton,Ca P4I0091 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36368 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 10/15/04 15 22 <br /> Purgeable Hydrocarbons by EPA 8015B- Quality Control <br /> Sequoia Analytical -Petaluma <br /> Reporting Spike Source °/uREC RPD <br /> Analyte Result limit Units Level Result %REC Limits RPD limit Notes <br /> Batch 4100248-EPA 503013,waters/EPA 8015B-VOA <br /> Matrix Spike Dup(4100248-MSD1) Source P410131-01 Prepared&Analyzed 10/12/04 <br /> Gasoline Range Organics(C4-C12) 2570 50 ug/l 2750 NIS 93 67-101 1 20 <br /> Surrogate 4-Bromofluorobenzene .319 300 106 804-110 <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 results are reported on a wet weight basis <br /> Thts analytical report must be reproduced in its entirety <br /> Page 9 of 12 <br />