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1455 McDowell Blvd North Ste 17 <br /> Sequoia Petaluma,CA94954 <br /> (707)792-1865 <br /> a— )� Analytical FAX(707)792-0342 <br /> www sequoialabs Qom <br /> URS Corp-Sacramento Project BP Heritage Site 11194,Tracy,Ca P404694 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36365 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 05/25/04 13 28 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> AMW4(P404694-07)Water Sampled 04/27/04 14 05 Received 04/29/04 12 20 <br /> Tert-amyl methyl ether ND 1 0 ugA 1 4050243 05/11/04 05/11/04 EPA 8260B <br /> Benzene ND 0 50 " " <br /> Tert-butyl alcohol ND 20 It I " <br /> Di-isopropyl ether ND 1 0 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 050 " <br /> Ethyl tert-butyl ether ND 1 0 <br /> Methyl tent-butyl ether ND 0 50 " <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate Dabromofluoromethane 107% 64-122 " <br /> Surrogate 12-Dichloroethane-d4 109% 74-135 " <br /> Surrogate Toluene-d8 99% 84-119 " <br /> MW-1 (P404694-08)Water Sampled 04/27/04 14 30 Received 04/29/04 12 20 <br /> ert-amyl methyl ether ND 1 0 ugll 1 4050243 05/11/04 05/11/04 EPA 8260B <br /> Benzene ND 050 " <br /> Tert-butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 1 0 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 050 " <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Methyl tert-butyl ether ND 0 50 " <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Surrogate Dabromofluoromethane 103% 84-122 " <br /> Surrogate 12-Dtchloroethane-d4 106% 74-135 " <br /> Surrogate Toluene-d8 99% 84-119 " <br /> Sequoia Analytical -Petaluma The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 8 of 2l <br />