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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9133 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> a- ) <br /> Analytical 819 Striker Avenue Suite 8 Sacramento G 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste 0 Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Project Unocal/Tosco Sampled 2/1/99 to 2/2/99 <br /> r <br /> gital Dr Suite 6 Project Number 227903/Unocal 5098 Received 2/3/99 <br /> to,CA 94949 Project Manager Mark Dockum Reported 2/18199 <br /> ample Description: S-65-B2 <br /> aboratory Sample Number. P902106-19 <br /> Batch Date Date Specific Method/ Reporting <br /> alyte Number Prepared Analyzed Surrogate Limits Ltrtut Result Units Notes* <br /> Se uoia Analytical-Petaluma <br /> Rota[Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M <br /> gasoline 9020307 2/16/99 2/16/99 100 144 mg/kg <br /> Benzene 00500 ND " <br /> oluene 00500 ND <br /> thylbenzene 00500 0 249 " <br /> ylenes(total) 0 100 ND " <br /> Surrogate a,a,a-Tri luorotoluene " _ 111 % --- —-- <br />�rrogate 4-Bromofluorobenzene _ 98 7 " <br /> 1 l <br /> Floia Analytical-Petaluma *Refer to end of report for text of notes and definitions <br /> IPage 8 of 24 <br />