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D 1455 McDowell lNorth Ste D <br /> Sequoia Petaluma, <br /> a,CA 94954 <br /> (707)792-1865 <br /> Analytical <br /> FAX(707)792-0342 <br /> • www sequota[abs cam <br /> URS Corp-Sacramento Project BP Hentage Site 11191,Stockton,Ca P401434 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36369 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 02/11/04 16 I0 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> Analyte Result Lnrut Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1 (P401434-01)Water Sampled 01/26/04 11 20 Received 01/27/04 17 00 <br /> Tert-amyl methyl ether ND 200 ug/l 200 4020169 02/07/04 02/07/04 EPA 8260B <br /> Benzene ND 100 " <br /> Tert-butyl alcohol ND 4000 " <br /> Di-isopropyl ether ND 200 " <br /> Ethanol ND 20000 " <br /> Ethylbenzene ND 100 " <br /> Ethyl tert-butyl ether ND 200 " <br /> Toluene ND 100 " <br /> Xylenes(total) ND 100 " <br /> Surrogate Dibromofluoromethane 99% 84-122 " <br /> Surrogate 1 2-Dtchloroethane-d4 99% 74-135 " <br /> Surrogate Toluene-d8 101 % 84-119 " <br /> MW-1 (P401434-O1RE1)Water Sampled 01/26/04 11 20 Received 01/27/04 17 00 <br /> •Methyl tent-butyl ether 10000 250 ug/l 500 4020192 02!09!04 02/09/04 EPA 8260B <br /> Surrogate Dibromofluoromethane 99% 84-122 " <br /> Surrogate 1 2-Dtchloroethane-d4 99% 74-135 " <br /> Surrogate Toluene-d8 101 % 84-119 " <br /> MW-2(P401434-02)Water Sampled 01/26/04 12 00 Received 01/27/04 17 00 <br /> Tert-amyl methyl ether ND 200 ugll 200 4020167 02/06/04 02/07/04 EPA 8260B <br /> Benzene ND 100 11 11 1. " <br /> Tert-butyl alcohol ND 4000 " <br /> Di-isopropyl ether ND 200 " <br /> Ethanol ND 20000 " <br /> Ethylbenzene ND 100 " <br /> Ethyl tert-butyl ether NO 200 " <br /> Methyl tert-butyl ether 980 100 " <br /> Toluene ND 100 " <br /> Xylenes(total) ND 100 " <br /> Surrogate Dibromofluoromethane 102% 84-122 " <br /> Surrogate 1 2-Dtchloroethane-d4 101 % 74-135 " " <br /> Surrogate Toluene-d8 98% 84-119 " " <br /> ,Sequoia Analytical-Petaluma The results to this report apply to the samples analyzed to accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> 77tts analytical report must be reproduced to its entirely <br /> Page 4 of 14 <br />