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1455 McDowell Blvd,North Ste D <br /> " <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> 42 <br /> iW Analytical www <br /> sequ7salabs om <br /> www sequoialabs com <br /> 0 <br /> URS Corp-Sacramento Project BP Heritage Site 11194,Tracy,Ca P411027 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36365 Reported <br /> Sacramento CA,95833 Project Manager Jeff Brooks 12/06/04 15 39 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical- Petaluma <br /> Reporting <br /> Analyte Result iamit Uruts Dilution Batch Prepared Analyzed Method Note <br /> MW-6(P411027-05)Water Sampled 10/28/041300 Received 10/29/04 13 10 BD <br /> Tert-amyl methyl ether ND 25 ugfl 25 4110095 11/03/04 11/03/04 EPA 8260E <br /> Benzene ND 12 " <br /> Tert-butyl alcohol ND S00 " <br /> Di-isopropyl ether ND 25 " <br /> Ethanol ND 2500 <br /> Ethylbenzene ND 12 <br /> Ethyl tert-butyl ether ND 25 " <br /> Methyl tert-butyl ether 65 12 <br /> Toluene ND 12 <br /> Xylenes(total) ND 12 " <br /> Surrogate Dibromofluoromethane 105% 84-122 11 " " <br /> Surrogate 1,2-Dichloroethane-d4 107% 74-135 " <br /> Surrogate Toluene-d8 117% 84-119 " <br /> Surrogate 4-Bromofluorobenzene 100% 86-119 " <br /> *—MW-7(P411027-06)Water Sampled 10/28/04 11 45 Received 10/29/04 13 10 <br /> Tert-amyl methyl ether ND 1 0 ug/] 1 4110095 11/03/04 11/03/04 EPA 8260B <br /> Benzene ND 0 50 " <br /> Tert-butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 10 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 050 <br /> Ethyl tert-butyl ether ND 10 " <br /> Methyl tent-butyl ether 21 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " » <br /> Surrogate Dibromofluoromethane 104% 84-122 " <br /> Surrogate 1,2-Dichloroethane-d4 110% 74-135 " <br /> Surrogate Toluene-d8 114% 84-119 " <br /> Surrogate 4-Bromofluorobenzene 99% 86-119 " <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the charn of <br /> custody document Unless otherwise stated,results are reported on a wet werght basis <br /> 0 This analytical report must be reproduced in its entirety <br /> Page 6 of 10 <br />