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a— ) <br /> 1455 NEcDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> Analytical (707)792- <br /> FAX(747)792-01865 342342 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project BP Heritage Site 11191,Stockton,Ca P307259 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36368 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 07/28/03 18 02 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Petaluma <br /> Reporting <br /> Analyse Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-7(P307259-07)Water Sampled 07/11/03 13 50 Received 07/15/03 09 30 <br /> Benzene ND 0 50 ug/l 1 3070391 07/18/03 07/19/03 EPA 8260E <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibromofluoromethane 96% 84-122 " <br /> Surrogate 1,2-Dichloroethane-d4 84% 74-135 " <br /> Surrogate Toluene-d8 100% 84-119 " <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 we/weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 6 of 11 <br />