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1551 IndustrW Road <br /> Sequoia San Carlos,CAX70-411 1 <br /> 4D (650)232-9600 <br /> FAX(650)232-9612 <br /> 1CO Analytical 'vww sequolWabs com <br /> Gettler-Ryan/Geostrategies(l) Project Tosco(5) Sampled. 7/5/00 <br /> 6747 Sure Court,Suite J Project Number Former UnocalSS#4409 Received. 7/5/00 <br /> Dublin,CA 94568 Project Manager Deanna Harden R 7/18/00 <br /> Sample Description: MW4 <br /> Laboratory Sample Number: L007041-05 <br /> Batch Date Date Specific Method/ Reporting <br /> Anal Number Analyzed Surrogate Limits Limit Result Units Notes* <br /> Sequoia Analytical-San Carlos <br /> Total Pu eable H drocarbons C6-02 BMX—and MTBE hl DHS LUFr <br /> Purgeable Hydrocarbons as Gasoline 0070051 7/13/00 7/13100 500 ND 119/1 <br /> Benzene " 0 500 ND " <br /> Toluene " " 0 500 ND " <br /> Ethylbenzene " " 0 500 ND " <br /> Xylenes(total) " 0 500 ND " <br /> Methyl tert-butyl ether 500 9.90 " <br /> Surrogate a,a,a-Tri luorotoluene " 700-130 130 <br /> Volatile Oreanle Compounds by EPA Method 8260A <br /> 1,2-Dibmmoedme 0070038 7/12/00 7112/00 200 ND ug/l <br /> 1,2-Dichloroethano " 2 00 ND " <br /> Di-isopropyl ether " " 200 ND " <br /> Ethyl tert-butyl ether " 200 ND <br /> Methyl tert-butyl ether " 200 12.5 " <br /> Tort-amyl methyl ether 200 ND " <br /> Tert-butyl alcohol " " 100 ND " <br /> Surrogate 1,2-Dochloroethane-d4 " " 760-114 103 <br /> Surrogate Toluene-& " 880-110 101 " <br /> Sequoia Analytical-San Carlos *Refer to end of reportfor text of notes and definitions <br /> Page 6 of I I <br />