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'^ 1455 McDowell Blvd,North Ste D <br /> i) Sequoia Petaluma,CA 94954 <br /> Ili Analytical FAX(707)792-(707)792-01865 342342 <br /> www sequoialabs corn <br /> URS Corp-Sacramento Project BP Heritage Site 11191,Stockton,Ca P310466 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36368 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 11/04/03 16 09 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Petaluma <br /> Reporting <br /> Analyte Result Lnmt Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-7(P310466-07)Water Sampled 10/77/03 10 45 Received 10/20/03 09 30 <br /> Tert-amyl methyl ether ND 10 ug/l 1 3100786 10/30/03 10/30/03 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 10 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibromofluoromethane 119% 84-122 " <br /> Surrogate 1,2-Dichloroethane-d4 106% 74-135 " <br /> Surrogate Toluene-d8 103% 84-119 " <br /> • <br /> Sequoia Analytical -Petaluma The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 7 of 14 <br />