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Sequoia Industrial Road <br /> San Carlos, <br /> CA 94070-41 11 <br /> (650) 232-9600 <br /> Analytical <br /> FAX(650) 232-9612 <br /> Sequoia-Walnut Creek Project: Gettler-Ryan Inc./TOSCO Sampled: 8/11/99 <br /> 404 N.Wigett Lane Project Number: W908271[Unocal SS#11 I95, 180175.85 Received: 8/18/99 <br /> Walnut Creek,CA 94568 Project Manager: Julianne Fegley Reported: 8/26/99 <br /> Sample Description: W908271-04/MW-3 <br /> Laboratory Sample Number: L908135-04 <br /> Hatch Date Date Specific Method/ Reporting <br /> Analyte Number Prepared Analyzed Surrogate Limits Limit Result Units Notes* <br /> Sequoia Analytical-San Carlos <br /> Total Purseable Hydrocarbons(C6-C12)-BTEX and MTBE by DHS LUFT_ <br /> Purgeable Hydrocarbons as Gasoline 9080103 8/19/99 8/20/99 2500 ND ug/l <br /> Benzene It <br /> " It <br /> 25.0 ND It <br /> Toluene " " " 25.0 ND " <br /> Ethylbenzene It <br /> " " 25.0 29.9 " <br /> Xylenes(total) " " " 25.0 ND It <br /> Methyl tert-butyl ether 9080145 8/25/99 8/25/99 1250 47300 It <br /> Surrogate: a,a.a-Trifluorotoluene 9080103 8/19/99 8/20/99 70.0-1.30 83.6 <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notes and definitions. <br /> Page 5 of 17 <br />