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Sequoia los, Industrial Road <br /> San Carlos, CA 94070-4111 <br /> (650)232-9600 <br /> Analytical <br /> FAX(650)232-9612 <br /> Sequoia-Walnut Creek Project: Gettler-Ryan Inc./TOSCO Sampled: 8111199 <br /> 404 N.Wigett Lane Project Number: W908271/Unocal SS#11195, 180175.85 Received: 8/18/99 <br /> Walnut Creek,CA 94568 Project Manager: Julianne Fegley Reported: 8/26199 <br /> Sample Description: W908271-121MW-12 <br /> Laboratory Sample Number: L908135-12 <br /> Batch 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-C1Z,BTEX and MTBE by DHS LUFT <br /> Purgeable Hydrocarbons as Gasoline 9080110 8/20/99 8/20/99 50.0 ND ug/I <br /> Benzene 0.500 ND " <br /> Toluene 0.500 ND " <br /> Ethylbenzene 0.500 ND " <br /> Xylenes(total) " It <br /> It 0.500 ND " <br /> Methyl tert-butyl ether " " It <br /> 5.00 ND " <br /> Surrogate: a,a,a-Trifluorotoluene 70.0-130 88.5 <br /> �J <br /> Si quoia Analytical-San Carlos *Refer to end of report for text of notes and definitions. <br /> Page 13 of 17 <br />