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l Road <br /> Sequoia 15x1 CA <br /> 0-4111 <br /> San Carlos,CA 94070-41 1 1 <br /> (650)232-9600 <br /> Analytical 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-12 <br /> Laboratory Sample Number: L002194-12 <br /> Batch Date Date Specific Method/ Reporting <br /> Analyte Number prepared Analyzed Surrogate Limits Limit Result Units Notes* <br /> Sequoia Ana"cal-San Carlos <br /> Total Pur eable Hydrocarbons C6-C12 BTEX and MTBE by DRS LUFT <br /> Purgeable Hydrocarbons as Gasoline 0030004 3/1/00 3/1/00 50.0 ND ug/l <br /> Benzene " '+ 0.500 ND " <br /> Toluene " 0.500 ND " <br /> Ethylbenzene 0.500 ND " <br /> Xylenes(total) +' It IN 0.500 ND It <br /> It i <br /> Methyl tert-butyl ether It <br /> It 5.00 ND <br /> Surrogate: a,a,a-Trifluorotoluene " ff to70.0-130 89.3 % <br /> Volatile Organic 0xvitenated Compounds by EPA Method 8260A <br /> Ethanol 0030008 3/2/00 312/00 1000 ND ug/1 <br /> Tert-butXl alcohol " 100 ND 9. <br /> Methyl tert-butyl ether " 2.00 ND <br /> f opropyl ether " " It2.00 ND " <br /> i tett-butyl ether 2.00 ND " <br /> Tert-amyl methyl ether " 2.00 ND it <br /> Surrogate: 1,2-Dichloroethane-d4 " " 76.0-114 96.2 <br /> f <br /> l <br /> k <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notes and definitions. <br /> Page 13 of 20 <br />