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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA W54 <br /> (747)792-1865865 <br /> FAX(707)792-0342 <br /> Analytical www sequoialabseom <br /> URS Corp-Sacramento Project BP Heritage Site 11191,Stockton,Ca P404678 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36368 Reported <br /> Sacramento CA,95833 Project ManagerVemon P Elanh 05/27/04 15 02 <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 /> MW-7(P404678-07)Water Sampled 04/27/04 08 45 Received 04/28/04 12 30 <br /> Tert-amyl methyl ether ND 10 ag/t 1 4050236 05/11/04 05/11/04 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 tent-butyl ether ND 1 0 <br /> Methyl tent-butyl ether ND 0 50 " <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 0 5o " <br /> Surrogate Dibromofluoromethane 96% 84-122 " <br /> Surrogate 1,2-Dtehloroethane-d4 106% 74-135 <br /> Surrogate Toluene-d8 100% 84-119 " <br /> Sequoia Analytical-Petaluma The results in 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 />