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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94454 <br /> a- ) (707)792-1665 <br /> rAnalytical FAX equoi labs c 42 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project BP Heritage Site 11194,Tracy,Ca P310692 <br /> 2870 Gateway Oaks Drive Suite 300 Protect 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 <br /> Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> AMW4(P310692-07)Water Sampled 10/29/03 12 30 Received 10/31/03 10 30 <br /> Tett-amyl methyl ether ND 1 0 ugA 1 3110188 11/11/03 11/11/03 EPA 9260B <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 10 " <br /> Methyl tert-butyl ether ND 0 50 " <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibromofluoromethane 103% 84-122 " ,r <br /> Surrogate 1,1-Dichloroethane-d4 97% 74-135 " <br /> rrogate Toluene-d8 112% 84-119 " <br /> IW" <br /> WW-3(P310692-08)Water Sampled 10/29/03 12 50 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 /> Di-isopropyi ether ND 10 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 0 50 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Methyl tert-butyl ether 5 1 050 " <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibromofluoromethane 107% 84-122 " <br /> Surrogate 12-Dtchloroethane-d4 96% 74-135 " <br /> Surrogate Toluene-d8 112% 84-119 " <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 8 of 22 <br />