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Sequoia 1455 McDowell Blvd,North Ste <br /> Petaluma,CA 949544 <br /> D— (707)792 1865 <br /> Analytical FAX(707)792-0342 <br /> • www sequoialabs corn <br /> URS Corp-Sacramento Project BP Heritage Site 11194,Tracy,Ca P308015 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36365 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 09/16/03 17 10 <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 (P308015-01)Water Sampled 07/30/03 11 10 Received 07131/03 14 40 <br /> Teri-amyl methyl ether ND 10 ug/l 1 3080058 08/05/03 08/05/03 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 1 0 " <br /> Methyl tent-butyl ether ND 050 <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 <br /> Surrogate Dtbromoluoromethane 101 % 84-122 " <br /> Surrogate 1 2-Dichloroethane-d4 110% 74-135 " <br /> rrogate Toluene-d8 108% 84-119 <br /> rrogate 4-BromoJluorobenzene 104% 86-119 <br /> AMW-2(P308015-02)Water Sampled 07/30/03 10 35 Received 07/31/03 14 40 <br /> Tert-amyl methyl ether ND 10 ug/l 1 3080058 08/05/03 08/05/03 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 1 0 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate DibromoJluoromethane 102% 84-122 " <br /> Surrogate 1 2-Dichloroethane-d4 111 % 74-135 " <br /> Surrogate Toluene-d8 111 % 84-119 " <br /> Surrogate 4-Bromq/luoroberizene 100% 86-119 " <br /> equota 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 21 <br />