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1455 McDowell Blvd,North Ste D <br /> Sequoia Petluraakuma,CA 94954 <br /> (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 Elarth 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 /> AMW-2(P310692-01)Water Sampled 10/29/03 10 25 Received 10/31/03 10 30 <br /> Tert-amyl methyl ether ND 1 0 ug/l 1 3110189 11/11/03 11/11/03 EPA 8260E <br /> Benzene ND 050 " <br /> Tert-butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 10 " <br /> Ethanol ND 100 " <br /> Etbylbenzene ND 050 " <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibromofluoromethane 95% 84-122 " <br /> Surrogate 12-Dtchloroethane-d4 99% 74-135 " <br /> Irrogate Toluene-d8 87% 84-119 " <br /> W-1 (P310692-02)Water Sampled 10/29/03 13 40 Received 10/31/03 10 30 <br /> Tert-amyl methyl ether ND 10 ugll 1 3110189 11/11/03 11/11/03 EPA 8260E <br /> Benzene ND 050 " <br /> Tert-butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 10 " <br /> Ethanol ND 100 <br /> Ethylbenzene ND 0 50 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Methyl tert-butyl ether ND 050 <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Surrogate Dtbromofluoromethane 97% 84-122 " <br /> Surrogate 1 2-Dtchloroethane-d4 103% 74-135 <br /> Surrogate Toluene-d8 90% 84-119 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> ofeusiody 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 22 <br />