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Sequoia Industrial [toad <br /> San Carlos, <br /> CA 94070-4111 <br /> Analytical <br /> �„f (6501232-9600 <br /> FAX(650) 232-9612 <br /> Sequoia-Walnut Creek Project: Gettler-Ryan Inc./TOSCO Sampled: 8111199 <br /> 404 N.Wigett Lane Project Number: W9082711Unocal SS#1 1195, 180175.85 Received: 8118199 <br /> Walnut Creek,CA 94568 Project Manager: Julianne Fegley Reported: 8126199 <br /> Sample Description: W908271-10/MW-10 <br /> Laboratory Sample Number: L908135-10 <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 Puraeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT <br /> Purgeable Hydrocarbons as Gasoline 9080103 8119199 8120/99 50.0 ND ug/1 <br /> Benzene " It <br /> " 0.500 ND " <br /> Toluene " IF <br /> " 0.500 ND to <br /> Ethylbenzene " IF 0.500 ND <br /> Xylenes(total) " IF <br /> " 0.500 ND It <br /> Methyl tert-butyl ether 9080144 8125199 8/25199 50.0 919 " <br /> Surrogate: a,a,a-Tris luorotoluene 9080103 8119199 8/20/99 70.0-130 86.7 <br /> "sequoia Analytical-San Carlos *Refer to end of report for text of notes and definitions. <br /> Page 11 of 17 <br />