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1455 McDowell Blvd, Ste D <br /> Sequoia Petaluma,,CA CA 94954 <br /> (767)792-1865 <br /> a- ) <br /> Analytical FAX(707)792-6342 <br /> . www sequoialabs com <br /> URS Corp-Sacramento Project BP Heritage Site 11194,Tracy,Ca P308015 <br /> 2870 Gateway Oaks Dnve Suite 300 Project Number WR36365 Reported <br /> Sacramento CA,95 83 3 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-4(P308015-03)Water Sampled 07/30/03 10 15 Received 07/31/03 14 40 <br /> Teti-amyl methyl ether ND 10 ug/l 1 3080111 08/07/03 08/07/03 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 0 50 " <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibromofluoromethane 108% 84-12.2 " <br /> Surrogate 12-Dtchloroethane-d4 110% 74-135 " <br /> 0rrogate Toluene-d8 107% 84-119 I' <br /> rrogate 4-BromoJluorobenzene 101 % 86-119 <br /> AMW-5(P308015-04)Water Sampled 07/30/03 13 35 Received 07/31/03 14 40 <br /> Tert-amyl methyl ether ND 5 0 ugA 5 3080111 08/07/03 08/07/03 EPA 8260B <br /> Benzene 94 25 " <br /> Tert-butyl alcohol ND 100 " <br /> Di-isopropyl ether ND 50 " <br /> Ethanol ND 500 " <br /> Ethylbenzene ND 25 " <br /> Ethyl tert-butyl ether ND 50 " <br /> Methyl tert-butyl ether 44 25 " <br /> Toluene ND 25 " <br /> Xylenes(total) ND 25 " <br /> Surrogate Dibromofluoromelhane 108% 84_122 „ <br /> Surrogate 12-Dtchloroethane-d4 111 % 74-135 " <br /> Surrogate Toluene-d8 108% 84-119 " <br /> Surrogate 4-Bromofluorobenzene 106% 86-119 " <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 reproduced in its entirety <br /> Page 6 of 21 <br />