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4D (701455 McDowell Blvd, Ste D <br /> c <br /> Sequoia Petaluma,,CA CA 94954 <br /> Analytical FAX <br /> 7)792-3865 <br /> (707)792-0342 <br /> • www sequoealabs com <br /> URS Corp-Sacramento Project BP 1lentage 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-5(P401433-05)Water Sampled 01/26/04 13 30 Received 01/27/04 17 00 <br /> Tert-amyl methyl ether ND 10 ug/l 1 4020142 02/05/04 02/06/04 EPA 8260B <br /> Benzene ND 050 " <br /> Tert-butyl alcohol 28 20 " <br /> Di-isopropyl ether ND 1 0 " <br /> Ethanol ND 100 <br /> Ethylbenzene ND 0 50 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Methyl tert-butyl ether 58 050 " <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate DtbromoJluaromethane 103% 84-122 " <br /> Surrogate 1 2-Dtchloroethane-d4 102% 74-135 " <br /> �arrogate Toluene-d8 101 % 84-119 " <br /> iMW-6(P401433-06)Water Sampled 01/26/04 13 50 Received 01/27/04 17 00 <br /> Tert-amyl methyl ether ND 10 ugA 1 4020142 02/05/04 02/06/04 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 10 " <br /> Methyl tert-butyl ether 1 6 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate Dtbromofluoromethane 103% 84-122 " <br /> Surrogate 1 2-Dtchloroethane-d4 102% 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 <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced to its entirety <br /> Page 7 of 18 <br />