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Sequoia Industrial Road <br /> San Carlos, <br /> CA 94070-4111 <br /> (650)232-9600 <br /> Analytical <br /> FAX(650)232-9612 <br /> Gettler-Ryan/Geostrategies(1) Project: Tosco(2) Sampled: 2/22/00 <br /> 6747 Sierra Court,Suite D Project Number: UNOCAL SS#11195 Received: 2/22/00 <br /> Dublin,CA 94568 Project Manager: Deanna Harding Reported: 3/7/00 <br /> Sample Description: MW-5 <br /> Laboratory Sample Number: L002194-06 <br /> Batch Date Date Specific Method/ Reporting <br /> Analyte Number Prepared Analyzed Surrogate Limits Limit Result Units Notes* <br /> Sequoia Analytical-San Carlos <br /> Total Pursteable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT <br /> Purgeable Hydrocarbons as Gasoline 0030012 3/2/00 3/2/00 50.0 115{7 ug/l 2 <br /> IF 11 11Benzene 0.500 ND " <br /> Toluene " 11 <br /> " 0.500 ND " <br /> Ethylbenzene " PI „ 0.500 ND " <br /> Xylenes(total) " 17 " 0.500 ND " <br /> Methyl tert-butyl ether 0030021 3/3/00 3/3/00 2500 49100 tp <br /> Surrogate: a,a,a-Trifluorotoluene 0030012 3/2100 312/00 70.0-130 81.7 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260A <br /> Ethanol 0030008 312/00 3/2/00 500000 ND u9/l <br /> Tert-butyl alcohol "" 50000 ND ". <br /> Methyl tert-butyl ether " 1000 49000 " <br /> 1'?;isopropyl ether " 1000 ND <br /> >: tent-butyl ether " " 1000 ND ° <br /> Tent-amyl methyl ether " " 1000 ND " <br /> Surrogate: 1,2-Dichloroethane-d4 " 76.0-114 92.2 <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notes and definitions. <br /> Page 7 of 20 <br />