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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792 1865 <br /> 1W Analytical FAX(707)792-0342 <br /> . www sequoialabs com <br /> URS Corp-Sacramento Project BP Heritage Site 11194,Tracy,Ca P401433 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36365 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 02/11/04 16 31 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> Analyte Result Limit ]Units Dilution Batch Prepared Analyzed Method Notes <br /> AMW 3(P401433-03)Water Sampled 01/26/04 12 45 Received 01/27/04 17 00 <br /> Tert-amyl methyl ether ND 10 ugfl 1 4020142 02/05/04 02/06/04 EPA 8260B <br /> Benzene ND 0 50 " <br /> Tert-butyl alcohol ND 20 " <br /> Di-tsopropyl ether ND 10 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 0 50 <br /> Ethyl tent-butyl ether ND 10 " <br /> Methyl tert-butyl ether 60 050 <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibromofluoromethane 100% 84-122 " <br /> Surrogate 1 2-Dichloroethane-d4 102% 74-135 " <br /> �urrogate Toluene-d8 100% 84-119 " <br /> MW-4(P401433-04)Water Sampled 01/26/04 12 30 Received 01/27/04 17 00 <br /> Teri-amyl methyl ether ND 10 ug(l 1 4020142 02/05/04 02/06/04 EPA 8260B <br /> Benzene ND 0 50 Il " <br /> Tert-butyl alcohol ND 20 <br /> Di-isopropyl ether ND 10 <br /> Ethanol ND 100 <br /> Ethylbenzene ND 050 " <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Methyl tent-butyl ether ND 050 " <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate Dibromotluoromethane 100% 84-122 " <br /> Surrogate 12-Dichloroeihane-d4 101 % 74-1.35 " <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 <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 6 of 18 <br />