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` <br /> a— ) (707)1455 McDowel3 Blvd,North SteSequoia Petaluma,CA 449544 792 1865 <br /> Analytical FAX(707)792-0342 <br /> www sequoialabs com <br /> URS Corn-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 EIarth 05/11103 20 30 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 80151318021B <br /> Sequoia Analyhcal-Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> AMW4 305041-04 Water Sam led 04/30/03 11 00 Received 05/01/03 16 05 <br /> Gasoline Range Organics ND 50 ug/1 1 3050237 05/09/03 05/09/03 EPA <br /> 8015BIS021B <br /> Benzene ND 0 50 " <br /> Toluene ND 050 n " " <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) ND 050 " n " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-Trtlluorotoluene 104% 65-135 " <br /> Surrogate 4-BromoJluorobenzene 94% 65-135 " <br /> AMW-5(P305041-05)Water Sampled 04/30/03 12 50 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/8021B <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether 68 25 " <br /> Surrogate a a a-Trtnuorotoluene 101 % 65-135 " <br /> Surrogate 4-BromoJluorobenzene 91 % 65-135 " <br /> AMW-6(P305041-06)Water Sampled 04/30/03 13 00 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/8021B <br /> Benzene ND 050 " <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tort-butyl ether 2 5 2 5 <br /> Surrogate a a a-Trifluorotoluene 104% 65-135 " <br /> Surrogate 4-BromoJluorobenzene 93% 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 4 of 13 <br />