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ID (65Sequoia los, Industrial Road <br /> San Carlos,CA 94070-4111 <br /> � Analytical <br /> 0) 232-9600 <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 Fe ley Reported: 8/26/99 <br /> Sample Description: W908271-07/MW-6 <br /> Laboratory Sample Number: L908135-07 <br /> Batch Date Date Specific Method/ Reporting <br /> Anal a Number Prepared Analyzed Surrogate Limits Limit Result Units Nates* <br /> Sequoia Analytical-San Carlos <br /> Total Pureeable Hydrocarbons(C6-C12).BTEX and MTBE,by DHS LUFT <br /> Purgeable Hydrocarbons as Gasoline 9080103 8/19/99 8/20/99 50.0 ND ug/1 <br /> Benzene IF " " 0.500 ND IF <br /> Toluene " IF <br /> IF <br /> 0.500 ND " <br /> Ethylbenzene IF IF <br /> " 0.500 ND It <br /> Xylenes(total) IF <br /> IF <br /> IF <br /> 0.500 ND If <br /> Methyl tert-butyl ether IF " " 5.00 ND " <br /> Surrogate: a.a,a-Trifluorotoluene 70.0-130 96.1 <br /> -Sequoia Analytical-San Carlos *Refer to end of report for text of notes and definitions. <br /> Page 8 of 17 <br />