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7� 1551 industrial Road <br /> Sequoia �CMos•CA%lo7aa111 <br /> 4 (650)232-600 <br /> Analytical FAX(650)Z37--%I n <br /> www.sequolalabs tort, <br /> • <br /> 11 Gcttler-Rysu/Geostrategies(1) Project; Tosco(5) Sampled. 6126/00 <br /> 6747 Sierra Court,Suite J Project Number Tosco(Unocal)SS#6981 Received. 6127/00 <br /> Dubl CA 94568 Project M Deanna Harding - 7/12/00 <br /> Sample Description: {- - - -- MW-11 - -- - -- - - -- - - - - <br /> Laboratory Sample Number* L006236-10 <br /> Batch Date Date Specific Method/ Reporting <br /> [AnalyteNumber EonMd Analyzed Surrogate Limits Limit Result Units Notes* <br /> Sequoia Analytical-San Carlos <br /> Total Puratable Hydrocarbons(C"12).BTEX and MTBE by DHS LUFT <br /> Purgeable Hydrocarbons as Gasoline 0070020 716100 7/6/00 500 ND ug/1 <br /> Benzene tt n tt 0 500 ND " <br /> Toluene 0 500 ND " <br /> Ethylbetizene 0 500 ND " <br /> Xylenes(total) n 0 500 ND " <br /> Meth l tort butyl ether 5 00 ND " <br /> Surrogate aaa-Trrfluorotoluene " " " 700-130 112 % <br /> Volatile Organic Oxygenated Compounds by EPA Method 11260A <br /> Text-butyl alcohol 0070023 7/7100 7/7/00 100 ND ug/l <br /> Methyl tett butyl ether M200 ND " <br /> Di-isopropyl ether " " " 200 ND " <br /> Ethyl tut butyl ether " 200 ND <br /> Tat-amyl methyl ether " " 200 ND " <br /> Surrogate. 1,2-Dichloroethane-d4 760-114 103 % <br /> Sequoia Analytical-San Carlos *Refer to end of reportfor text of notes and def nitions <br /> Page 11 of 30 <br />