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Sequoia 1551 Industrial Road <br /> San Carlos, CA 94070-4111 <br /> m„p Analytical {650) 232-9600 <br /> FAX(650) 232-9612 <br /> _ 'sI <br /> 6ettler-Ryan/Geostrategies(1) Project: Tosco(I) Sampled: 5/20/99 <br /> 6747 Sierra Court,Suite D Project Number: Unocal SS#11195 Received: 5/20/99 <br /> Dublin,CA 94568 Project Manager: Deanna Harding Reported: 6/3/99 <br /> Sample Description: MW-1 <br /> Laboratory Sample Number: L905441-02 <br /> Batch Date Date Specific Method/ Reporting <br /> Analyte Number Prepared Analyzed Surrogate Limits Limit Result Units Notes* <br /> Seuuoia Analytical-San Carlos <br /> Total Pur¢eable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT <br /> Purgeable Hydrocarbons as Gasoline 9050116 5/26/99 5/26/99 50.0 ND ug/1 <br /> Benzene " " It 0.500 ND " <br /> Toluene It <br /> 0.500 ND " <br /> Ethylbenzene 0.500 ND " <br /> Xylenes(total) 0.500 ND " <br /> Methyl tert-butyl ether 9050126 5/27/99 5/27/9_9 500 3380 " <br /> Surrogate: a,a,a-Trifluorotoluene 9050116 5/26/99 5/26/99 70.0-130 127 <br /> Volatile Organic Oxvgenated Compounds CEPA Method 82.60A_ <br /> Ethanol 9060001 6/1/99 6/1/99 62500 ND ug/1 <br /> Tert-butyl alcohol 12500 ND " <br /> Methyl tent-butyl ether 125 7130 " <br /> Di-isopropyl ether 125 ND " <br /> Ethyl tert-butyl ether 125 ND " <br /> -amyl methyl ether _ 125 ND " <br /> 6i rrogate: 1,2-Dichloroethane-d4 76.0-114 102 <br /> f uoia Analytical-San Carlos *Refer to end of report for text of notes and definitions. <br /> Page 3 of 19 <br />