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Sequoia 61°Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Project Unocal/Tosco Sampled 2/1/99 to 212/99 <br /> fDigital Dr Suite 6 Protect Number 227903JUnocal 5098 Received 2/3/99 <br /> to,CA 94949 Pro ect Manager Mark Dockum Reported 2/I8/99 <br /> ample Description S-55-82 <br /> boratory Sample Number P902106-17 <br /> Batch Date Date Specific Method/ Reporting <br /> alyte Number Prepared Analyzed Surrogate Limits Limit Result Units Notes* <br /> Sequoia Analytical-Petaluma <br /> tal Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M _— <br /> ohne 9020325 2/13/99 2/13/99 0 400 ND mg/kg <br /> Benzene 000200 ND " <br /> flluene " " 000200 ND " <br /> ylbenzene 000200 ND " <br /> enes(total) 000400 ND " <br /> Surrogate a,a,a-Trifluorotoluene - 913 % <br />�rrogate 4-Bromofluorobenzene - 850 " <br /> 1 <br /> 1 <br /> Flia Analytical-Petaluma *Refer to end of report for text of notes and definitions <br /> Page 6 of 24 <br />