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Sequoia <br /> los, Industrial Road <br /> �]1, fi San Carlos,CA 94070-4111 <br /> A (650) 232-9600 <br /> Analytical <br /> FAX(650) 232-9612 <br /> Sequoia-Walnut Creek Project: Gettler-Ryan Inc./TOSCO Sampled: 8/11/99 <br /> 404 N.Wigett Lane Project Number: W908271/Unocal SS#11195, 180175.85 Received: 8/18/99 <br /> Walnut Creek,CA 94568 Project Manager: Julianne Fegley Reported: 8/26/99 <br /> Sample Description: W908271-11/MW-11 <br /> Laboratory Sample Number: L908135-11 <br /> Batch Date Date Specific Method/ Reporting <br /> Analyte Number Prepared Analyzed Surrogate Limits Limit Result Units Notes* <br /> Senuoia Analytical-San Carlos <br /> Total Pur¢eable Hydrocarbons fC6-C121,BTEX and MTBE by DHS LUFT <br /> Purgeable Hydrocarbons as Gasoline 9080110 8/20/99 8/20/99 50.0 ND ug/1 <br /> Benzene IF <br /> IF <br /> " 0.500 ND " <br /> Toluene " IF <br /> IF <br /> 0.500 ND " <br /> Ethylbenzene " It IF <br /> 0.500 ND IF <br /> Xylenes(total) " " IF <br /> 0.500 ND " <br /> Methyl tent-butyl ether 9080144 8/25/99 8/25/99 500 16200 " <br /> Surrogate: a,a.a-Trifluorotoluene 9080110 8/20/99 8/20/99 70.0-130 98.9 % T� <br /> I <br /> i <br /> - i <br /> ,,equoia Analytical-San Carlos *Refer to end of report for text of notes and definitions. <br /> Page 12 of 17 <br /> k <br />