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1551 Industrial Road <br /> Sequoia �`�'°s, 111 <br /> 6 2'2- <br /> D <br /> FAX{650)232 3612 <br /> Analytical www.sequ°lalabs.corrr <br /> Gettier-Ryan/Geostrategies(1) Project: Tosco(2) Sampled: 8/28/00 <br /> 6747 Sierra Court,Suite 7 Project Number. Unocal SS#11195/16500 So.lntastate I-5,Laditgtdved: 8/28100 <br /> Dublin,CA 94568 Eject Manager Deanna H : 9/14/00 <br /> Sample Description: MW-10 <br /> Laboratory Sample Number: L008195-10 <br /> Batch Date Date Specific Method/ Reporting <br /> Anel Number Prepared Analyzed Surrogate Limits Limit Result Units Notes* <br /> Sequoia Analytical-San Carlos <br /> Total Pur sable Hdrocarbons C6-C12 BTEX and MTBE b DHS LUFT <br /> Purgeable Hydrocarbons as Gasoline 0090020 9/6100 9/6/00 50.0 ND ug/1 <br /> Benzene " is 0.500 ND It <br /> Toluene IN 0.500 ND IN <br /> Ethylbeuzene " 0.500 ND ItXylenes(total) " 1. <br /> 0.500 ND If <br /> Methyl tert-butyl ether 9/8/00 200 1760 or 2 <br /> Surrogate: a,a,a-Trifiuorotoluene If 916100 70.0-130 110 % <br /> Volatile Organic OXygenated Compounds by EPA Method 8260B <br /> Tert-butyl alcohol 0080144 8130/00 8130/00 2000 ND ugn <br /> Methyl tent-butyl ether " If <br /> " 40.0 2120 IN <br /> Di-isopropyl ether " 40.0 ND " <br /> Ethyl tent-butyl ether 1. 40.0 ND <br /> Tert-amyl methyl ether " 40.0 ND <br /> Surrogate: 1,2Diehloroethane-d4 " 76.0-114 101 % <br /> i <br /> I <br /> I <br /> I <br /> Sequoia Analytical-San Carlos *Refer to end of report for tett of notes and definitions. <br /> Page l 1 of 20 <br />