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ID (701455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> Analytical FAX <br /> 7)7921865 <br /> 707)792-0342 <br /> www sequoialabs corn <br /> aURS Corp-Sacramento Project BP Heritage Site 11194,Tracy,Ca P305041 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36365 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 05/15/03 20 30 <br /> Total Petroleum Hydrocarbons as Gasallne and BTEX by EPA 8015B18021B <br /> Sequoia Analytical-PetaIuma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-7(P305041-13)Water Sampled 04/30/03 10 30 Received 05/01/03 16 05 <br /> Gasoline Range Organics ND 50 ug/1 1 3050237 05/09/03 05/09/03 EPA <br /> 8015B/8021 B <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether 48 25 " <br /> Surrogate a a a-Trifluorotoluene 104°/a 65-135 <br /> Surrogate 4-Bromofluorobenzene 92% 65-135 <br /> MW-8(P305041-14)Water Sampled 04/30/03 13 25 Received 05/01/03 16 05 <br /> Gasoline Range Organics ND 50 ug/l 1 3050237 05/09/03 05/09/03 EPA <br /> 8015B/8021 B <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether 61 25 " <br /> Surrogate a a a-Trifluorotoluene 103% 65-135 <br /> Surrogate 4-Bromofluorobenzene 93% 65-135 " <br /> I <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 7 of 13 <br />