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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaltuna,CA 94954 <br /> iz_ (707)792-1865 <br /> � Analytical FAX(707)792-0342 <br /> www sequoialabs cora <br /> URS Corp-Sacramento Project BP Heritage Site 11191,Stockton,Ca P410091 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36368 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 10/15/04 15 22 <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 /> MW-7(P410091-07)Water Sampled 10/04/04 13 35 Received 10/05/04 18 00 <br /> Tert-amyl methyl ether ND 10 ugA 1 4100304 10/13/04 10/13/04 EPA 82608 <br /> Benzene ND 050 » <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 10 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibromofluoromethane 105% 84-111 " <br /> Surrogate 1,2-Dichloroethane-d4 111 % 74-135 " <br /> Surrogate Toluene-d8 115% 84-119 " <br /> ,Surrogate 4-BromoJluorobenzene 102% 86-119 " <br /> Sequoia Analytical -Petaluma The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> 0 This analytical report must be reproduced in its entirety <br /> Page 7 of 12 <br />