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1551 Zndustrw Road <br /> Sequoia sa.,Carim LA -% <br /> (6S0)0)Z32232-9600 <br /> Analytical FAX(650)232-9612 <br /> www.sequoialabs.com <br /> 1yan/Geostrategies Project: Tosco Sampled: 4/10/00 <br /> r67!47SicrM Court,Suite D Project Number. Unocal SS#4409 Received: 4110100 <br /> CA 94568 Project Manger. Deanna Harding ETorte& 4/24/00 <br /> Sample Description: TB-LB <br /> Laboratory Sample Number: L004096-01 <br /> Batch Date Date Specific Method/ Reporting <br /> lAn&"e Number Prepared Analyzed Surrogate Limits Limit Result Units Notes* <br /> Sequoia Analytl¢al-San Carlon <br /> Total Purgeable Hydrocarbons(C6-C12).BTEX and MTBE by DHS LUFT <br /> Purgeable Hydrocarbons as Gasoline 0040089 4/18/00 4118/00 50.0 ND ug/l <br /> Benzene 0.500 ND " <br /> Toluene " 0.500 ND " <br /> Ethylbcn=e 0.500 ND " <br /> Xylenes(total) n n n 0.500 ND " <br /> Methyl tert-butyl ether n n n 5.00 ND n <br /> Surrogate. a,ax-Trifluorotolaene 70.0-130 86.4 <br /> Ank <br /> is Analytical-San Carlos *Refer to end of report for text of notes and definitions. <br /> Page 2 of 1 i <br />