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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma CA 94954 <br /> (707)792-1865865 <br /> � www seuo Analytical FAX qlabs c 42 <br /> uoialacom <br /> URS Corp-Sacramento Project BP Heritage Site 11194,Tracy,Ca P310692 <br /> 2870 Gateway Oaks Dnve 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-3(P310692-03)Water Sampled 10/29/03 11 10 Received 10/31/03 10 30 <br /> Tert-amyl methyl ether ND 10 ugA 1 3110188 11/11/03 11/11/03 EPA 8260E <br /> Benzene ND 0 50 <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 1 0 <br /> Methyl tert-butyl ether 7 6 050 <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibromofluoromethane 103% 84-122 <br /> Surrogate 12-Dtchloroethane-d4 95% 74-135 " <br /> IWrrogate Toluene-d8 112% 84-119 " <br /> W-7(P310692-04)Water Sampled 10/29/03 11 30 Received 10/31/03 10 30 <br /> Tert-amyl methyl ether ND 1 0 u0 1 3110188 11/11/03 11/11/03 EPA 826013 <br /> Benzene ND 050 <br /> Tert-butyl alcohol 23 20 " <br /> Di-isopropyl ether ND 1 6 " <br /> Ethanol ND 106 " <br /> Ethylbenzene ND 050 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Methyl tert-butyl ether 14 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 <br /> Surrogate DibromoJluoromethane 104% 84-122 <br /> Surrogate 12-Dichloroethane-d4 95% 74-135 " <br /> Surrogate Toluene-d8 I11 % 84-119 " <br /> Sequoia 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 22 <br />