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]455 Mcl]owell alu North Ste <br /> a— ) <br /> Sequoia <br /> oia Petaliuna,CA 944544 <br /> Analytical (107)792-1363 <br /> FAX(707)792-0342 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project BP Hentage Site 11191,Stockton,Ca P410091 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36368 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 10/15/04 15 22 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical- Petaluma <br /> Repomng <br /> [A-alyse Result Irmrt Umts Ehlution Batch Prepared Analyzed Method Note <br /> MW-5(P410091-05)Water Sampled 10/04/04 11 15 Received 10/05/04 18 00 <br /> Tert-amyl methyl ether ND 100 ug11 100 4100304 10/13/04 10/14/04 EPA 82608 <br /> Benzene ND 50 " <br /> Ten-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 tent-butyl ether 4800 50 " <br /> Toluene ND 50 " <br /> Xylenes(total) ND 50 " <br /> Surrogate Dibromofluoromethane 105% 84-122 " <br /> Surrogate 1,2-Dichloroethane-d4 109% 74-135 " <br /> Surrogate Toluene-d8 116% 84-119 " <br /> Surrogate 4-Bromofluorobenzene 105% 86-119 " <br /> IOMW-6(P410091-06)Water Sampled 10/04/04 13 15 Received 10/05/04 18 00 <br /> Tert-amyl methyl ether ND 1 0 ugll 1 4100304 10/13/04 10/13/04 EPA 8260B <br /> Benzene ND 050 " <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 tert-butyl ether ND 050 " <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibromofluoromethane 106% 84-122 " <br /> Surrogate 12-Dichloroethane-d4 108% 74-135 " <br /> Surrogate Toluene-d8 115% 84-119 <br /> Surrogate 4-Bromofluorobenzene 104% 86-119 " <br /> Sequoia Analytical-Petaluma Te 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 6 of 12 <br />