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4D (707) <br /> . 1455 McDowell Blvd, SteSequora Ptaluma CA CA 9495444iW Analytical >:Ax 7921865 <br /> 707)792-0342 <br /> • www sequoialahs 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 02111/04 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-1 (P401433-01)Water Sampled 01/26/04 11 10 Received 01/27/04 17 00 <br /> Tert-amyl methyl ether ND 10 ug/I 1 4020142 02/05/04 02/06/04 EPA 8260B <br /> Benzene ND 0 50 " <br /> Tert-butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 1 0 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 0 50 <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Methyl tert-butyl ether ND 0 50 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate Dibromofluoromethane 102% 84-122 " <br /> Surrogate 1,2-Dichloroethane-d4 101 % 74-135 " <br /> urrogate Toluene-d8 100% 84-119 " <br /> *--MW-2(P401433-02)Water Sampled 01/26/04 12 10 Received 01/27/04 17 00 <br /> Tert-amyl methyl ether ND 1 0 11g/1 1 4020142 02/05/04 02/06/04 EPA 8260E <br /> Benzene ND 0 50 " <br /> Tert-butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 1 Q " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 050 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibromofluoromethane 101 % 84-122 " <br /> Surrogate 1,2-Dichloroethane-d4 101 % 74-135 " <br /> Surrogate Toluene-d8 99% 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 5 of 18 <br />