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1455 McDowell Blvd North Ste D <br /> • Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> FAX 92-0342 <br /> Analytical wwseg7)7abscom <br /> ww�v sequoialabs win <br /> URS Carp-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 Manager Vernon P Elanh 05/27/04 15 02 <br /> Volatile Organic Compounds by EPA Method 8260E <br /> Sequoia Analytical -Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-5(P404678-05)Water Sampled 04/27/04 09 20 Received 04/28/04 12 30 <br /> Teri-amyl methyl ether ND 100 ugA 100 4050236 05/11/04 05/11/04 EPA 8260E <br /> Benzene ND 50 " <br /> Tert-butyl alcohol ND 2000 " <br /> Di-isopropyl ether ND 100 <br /> Ethanol ND 10000 <br /> Ethylbenzene ND 50 <br /> Ethyl tert-butyl ether ND 100 " <br /> Methyl tert-butyl ether 4600 50 <br /> Toluene ND 50 " <br /> Xylenes(total) ND 50 " <br /> Surrogate Dibromofluoromethane 99% 84-122 " <br /> Surrogate 12-Dichloroethane-d4 106% 74-135 " <br /> Surrogate Toluene-d8 100% 84-119 " <br /> MW-6(P404678-06)Water Sampled 04127104 10 45 Received 04/28/04 12 30 <br /> -amyl methyl ether ND 1 0 ugll 1 4050236 05/11/04 05111104 EPA 8260B <br /> enzene ND 050 " <br /> Tert-butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 1 0 <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 0 50 " <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 96% 84-122 " <br /> Surrogate 1,2-Dichloroelhane-d4 112% 74-135 " <br /> Surrogate Toluene-d8 101 % 84-119 " <br /> I <br /> i <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 6 of 14 <br />