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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 /> Sequoia-Walnut Creek Project: Gettler-Ryan Inc./TOSCO Sampled: 8/11/99 <br /> 404 N.Wigett Lane Project Number: W908271/Unocal SS#1 1195, 180175.85 Received: 8/18/99 <br /> Walnut Creek,CA 94568 Project Manager: Julianne Fe ley Reported: 8126/99 <br /> Sample Description: W908271-02/MW-1 <br /> Laboratory Sample Number: L908135-02 <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 Purseable Hydrocarbous(C6-C12),BTEX and MTBE by DHS LUFT <br /> Purgeable Hydrocarbons as Gasoline 9080129 8/23/99 8/24/99 50.0 99.7 ug/l <br /> Benzene " " " 0.500 ND It <br /> Toluene " 0.500 ND " <br /> Ethylbenzene if 0.500 ND " <br /> Xylenes(total) 0.500 ND " <br /> Methyl tert-butyl ether 500 7060 " <br /> Surrogate: a,a,a-Trifluorotoluene 70.0-130 87.5 <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notes and definitions. <br /> i <br /> Page 3 of 17 <br />