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1551 Industrial Road <br /> Sequoia San Carlos,CA 94070-4111 <br /> (650)232-960960 <br /> a) <br /> 0 <br /> . 4 FAX(650)232-9612 <br /> 0- Analytical vwvw.sequoialabs.com <br /> Gettler-Ryan/Geostrategies(1) Project: Tosco(2) Sampled: 11/13/00 <br /> 6747 Sierra Court,Suite J Project Number: Unocal SS#F11195 Received: 11/13/00 <br /> Dublin,CA 94568 Project Manager: Deanna Harding Reported: 11/29/00 <br /> Sample Description: MW-2 <br /> Laboratory Sample Number: L011152-03 <br /> Batch Date Date Specific Method/ Reporting <br /> lAnalyte Number Prepared Analyzed Surrogate Limits Limit Result Units Notes* <br /> Sequoia Analytical-San Carlos <br /> Total Pur eable Hydrocarbons C6-C12 BTEX and MTBE by DHS LUIT <br /> Purgeable Hydrocarbons as Gasoline 0110108 11/21/00 11/22/00 50.0 ND ug/1 <br /> Benzene It <br /> " It <br /> 0.500 ND " <br /> Toluene it It if0.500 ND " <br /> Ethylbenzene If <br /> If <br /> 0.500 ND „ <br /> Xylenes(total) If <br /> itIf0.500 ND " <br /> Methyl tert-butyl ether If " 5.00 52.1 " <br /> Surrogate. a,a,a-Trifluorotoluene " If70.0-130 89.4 % <br /> Volatile Oreanic Oweenated Compounds by EPA Method 8260E <br /> Tert-butyl alcohol 0110084 11/16/00 11/16/00 100 ND ug/l <br /> Methyl tert-butyl ether " . 2.00 54.9 " <br /> Di4sopropyl ether " " If 2.00 ND " <br /> r %.,tert butyl ether If 2.00 ND „ <br /> '1,—_ myl methyl ethr " " 2.00 ND „ <br /> Surrogate. 1,2-Dichloroethane d4 ff " 76.0-114. 96.4 <br /> Sequois Analytical-San Carlos *Refer to end of report for test of notes and definitions. <br /> Page 4 of 19 <br />