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SSequoia 1455 McDowell Blvd,North Ste D <br /> Q Petaluma,CA 94954 <br /> a— ) (707)792-1865 <br /> ► Analytical FAX(707)792-0342 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project BP Heritage Site 11194,Tracy,Ca P310692 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36365 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elartb 11/14/03 15 55 <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 /> MW-1 (P310692-05)Water Sampled 10/29/03 11 55 Received 10/31/03 10 30 <br /> Tert-amyl methyl ether ND 10 ug/l 1 3110188 11/11/03 11/11/03 EPA 8260B <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 10.5% 84-122 11 11 " " <br /> Surrogate 1 1-Dichloroethane-d4 97% 74-135 11 11 " <br /> 11 <br /> rrogate Toluene-d8 111 % 84-119 11 <br /> go <br /> (P310692-06)Water Sampled 10/29/03 13 35 Received 10/31/03 10 30 <br /> Tert-amyl methyl ether ND 10 ugll 1 3110188 11/11/03 11/11/03 EPA 8260B <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 2 7 050 <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Surrogate DibromoJluoromelhane 102% 84-111 " <br /> Surrogate 1 1-Dichloroethane-d4 95% 74-135 " <br /> Surrogate Toluene-d8 112% 84-119 " <br /> equoia 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 reproduCLd in its entirety <br /> Page 7 of 22 <br />