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1551 Industrial Road <br /> Sequoia ��650)23296W <br /> FAX(650)232-9612 <br /> *� Analytical www.sequolalabs.com <br /> Gettler-Ryan/Geostmtegies(1) Project: Tosco(2) Sampled: 11/13/00 <br /> 6747 Sierra Court,Suite J Project Number: Unocal SS#11195 Received: 11/13/00 <br /> Dublin,CA 94568 Project Manager: Deanna HardinReported: 11/29/00 <br /> Sample Description: MW-6 <br /> Laboratory Sample Number: L011152-07 <br /> Batch Date Date Specific Method/ Reporting <br /> Anal Number Prepared Analyzed Surrogate Limits Limit Result Units Notes" <br /> Se uoia Analytical-San Carlos <br /> Total Pureeable Hydrocarbons &C12 BTEX and MTBE bV DHS LUFT <br /> Purgeable Hydrocarbons as Gasoline 0110108 11/21/00 11/22/00 50.0 ND ug/1 <br /> Benzene „ " 0.500 ND " <br /> Toluene 0.500 ND " <br /> Ethylbenzene 0.500 ND " <br /> Xylenes(total) „ " 0.500 ND <br /> Methyl tert-bu l ether It <br /> " it 5.00 ND " <br /> Surrogate: a,a,a-Tris luorotoluene ft of70.0-130 91.8 % <br /> Volatile Or ante Oxwenated Com ounds by EPA Metbod 8260B <br /> Tert-butyl alcohol 0110084 11/16/00 11/16/00 100 ND ug/l <br /> Methyl tert-butyl ether 91 <br /> " 2.00 ND <br /> Di-isopropyl ether " „ 2.00 ND <br /> �tert-butyl ether " 2.00 ND <br /> ��1amy1 methyl ether " „ 2.00 ND <br /> Surrogate: 1,2-Dichloroethane-d4 " " 76.0-114 100 % <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notes and definitions. <br /> Page 8 of 19 <br />