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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)3(A-9600 FAX(650)364-9233 <br /> 1 404 N Wlget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(9Z5)988-9673 a- ) <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical <br /> 1455 McDowell Blvd North Ste R Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Project UnocaVrosco Sampled 211199 to 2/2/99 <br /> fDigital Dr Suite 6 Project Number 227903/Unocal 5098 Received 213199 <br /> to,CA 94949 Project Manager Mark Dockum Reported 2/18/99 <br /> ample Description. S-80-132 <br /> aboratory Sample Number P902106-32 <br /> Batch Date Date Specific Method/ Reporting <br /> tal a Number Pre aced Analyzed Surrogate Llnuts Limit Result Units Notes* <br /> Sequoia Analyhcal-Petaluma <br /> tal Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M <br /> illasoline 9020325 2113199 V14/99 0 400 ND mg/kg <br /> Benzene " 000200 ND " <br /> luene 000200 ND <br /> thylbenzene 000200 000362 <br /> ylenes(total) 000400 00132 " <br /> Surrogate a,a a-Trefluorotoluene " - 967 % <br /> rrogate 4-Bromofluorobenzene " - 853 " <br /> Opia Analytical-Petaluma "Refer to end ofreport for text ofnotes and definitions <br /> Page 17 of 24 <br />