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1551 Industrial Road <br /> San Carlos,CA 94070-4111 <br /> Sequoia (650)232-4 960Q� <br /> FAX(650)232-961 <br /> a) Analytical w""' u°'al <br /> Gettler-Ryan/Geostrategies(1) Project: Tosco(2) Sampled: 11/13/00 <br /> 6747 Sierra Court,Suite 3 Project Number: Unocal SS911195 Received: 11/13/00 <br /> Dublin,CA 94568 Project Manager: Deanna HardinReported: 11/29/00 <br /> Sample Description: MW-5 <br /> Laboratory Sample Number: L011152-06 <br /> Batch Date Date Specific Method/ Reporting <br /> Anal Number ared Analyzed Surrogate Limits Limit Result Units Notes* <br /> Sequoia Analytical-San Carlos <br /> Total Pur eable Hydrocarbons C6-C12 BTEX and MTBE by DHS LUF-1C <br /> Purgeable Hydrocarbons as Gasoline 0110108 11/21/00 11/22/00 50.0 ND ug/l <br /> Benzene " 0.500 ND <br /> „ <br /> Toluene ". 0.500 ND " <br /> Ethylbenzene " " " 0.500 . ND to <br /> Xylenes(total) " „ " 0.500 ND 11 <br /> Methyl tert butyl ether 250 5170 1, 2 <br /> Surrogate: a,a,a-Trifluorotoluene " 70.0-130 97.6 <br /> Volatile Oma nic O enated Compounds by EPA Method 82608 <br /> Tert-butyl alcohol 0110084 11/16/00 11/16/00 5000 ND U9/1 <br /> Methyl tert-butyl ether " " IT 100 5550 to <br /> Di-isopropyl ether to " to 100 ND to <br /> Ethyl tett-butyl ether It 100 ND " <br /> Tert-amyl methyl ether " 100 ND ° <br /> Surrogate: 1,2 Dichloroethane-d4 " 76.0-114 102 <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notes and definitions. <br /> Page 7 of 19 <br /> 15 <br />