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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> a— )� Analytical FAX(707)792-0342 <br /> www sequoialabs coin <br /> i <br /> URS Corp-Sacramento Protect BP Heritage Site 11194,Tracy,Ca P411027 <br /> 2870 Gateway Oaks Drive Suite 300 Protect Number WR36365 Reported <br /> Sacramento CA,95833 Protect Manager Jeff Brooks 12/06/04 15 39 <br /> Volatile Organic Compounds by EPA Method 826OB <br /> Sequoia Analytical -Petaluma <br /> Reporting <br /> Analyte Result lama Units Dilution Batch Prepared Analyzed Method Note <br /> AMW-6(P411027-03)Water Sampled 10/28/04 12 05 Received 10/29/04 13 10 <br /> Tert-amyl methyl ether ND 1 0 ug/1 1 4110095 11/03/04 11/03/04 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 069 0 50 " <br /> Toluene ND 0 50 <br /> Xylenes(total) ND 050 <br /> Surrogate Drbromofluoromethane 105% 84-122 " <br /> Surrogate 12-Dichloroethane-d4 110% 74-135 " <br /> Surrogate Toluene-d8 115% 84-119 " <br /> Surrogate 4-Bromofluorobenzene 101 % 86-119 " <br /> .MW-4(P411027-04)Water Sampled 10/28/04 12 25 Received 10/29/04 13 10 <br /> Tert-amyl methyl ether ND 10 UFA 10 4110095 11/03/04 11/03/04 EPA 8260B <br /> Benzene ND 50 " <br /> Tert-butyl alcohol ND 200 " <br /> Di-isopropyl ether ND 10 <br /> Ethanol ND 1000 <br /> Ethylbenzene 10 5 0 <br /> Ethyl Cert-butyl ether ND 10 " <br /> Methyl tert-butyl ether 120 5 0 " <br /> Toluene ND 5 0 " <br /> Xylenes(total) ND 5 0 " <br /> Surrogate Dibromofluoromethane 104% 84-122 " <br /> Surrogate 1,2-Dichloroethane-d4 107% 74-135 " <br /> Surrogate Toluene-d8 118% 84-119 " <br /> Surrogate 4-Bromofluorobenaene 101 % 86-119 " <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 slated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 5 of 10 <br />