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1551 Industrial Road <br /> Sequoia �"�'� 650 23329600 <br /> FAX(650)232-%1-1 <br /> Analytical ` "`�' °o'� � : <br /> Gettler-Ryan/Geostrategies(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-8 <br /> Laboratory Sample Number: L011152-09 <br /> Batch Date Date Specific Method/ Reporting <br /> Anal Number Prepared Analyzed Surrogate Limits Limit Result Units Notes* <br /> Sequoia Anal 'cal-San Carlos <br /> Total Pur eable Hydrocarbons C6-C12 BTEX and MTBE by DHS LUFI' <br /> Purgeable Hydrocarbons as Gasoline 0110107 11/21/00 11/22/00 50.0 ND ug/l <br /> Benzene " " " 0.500 ND If <br /> Toluene It <br /> It 0.500 ND It. <br /> Ethylbenzene ti " 0.500 ND " <br /> Xylenes(total) " 0.500 ND " <br /> Methyl tert-butyl ether 5.00 16.0 " <br /> Surrogate: a,a,a-Trifluorotoluene " 70.0-130 94.2 % <br /> Volatile Organic Oxygenated CMouuds by EPA Method 8260B <br /> Tert-butyl alcohol 0110084 11/16/00 11/16/00 100 ND ug/1 <br /> Methyl tert-butyl ether if 2.00 22.2 " <br /> Di-isopropyl ether " " " 2.00 ND " <br /> Ethyl tert-butyl ether " " " 2.00 ND <br /> Tat amyl methyl ether It <br /> It 2.00 ND " <br /> Surrogate. 1,2 Dichloroethane-d4 " 76.0-114 103 % <br /> f <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notes and definitions. <br /> Page 9 of 19 <br />