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41� Sequoia 1551 Industrial Road <br /> San Carlos CA 94070 <br /> rte► Analytical (650)232 FAX(65 0)232 96012 <br /> www sequo,alabs cont <br /> ler-Ryan/Geostrategies(1) Project Tosco(1) <br /> 7 Sierra Court,Suite J Project Number Unocal SS#08671,Stockton,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 02/28/02 11 15 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-7 L201080-08 Water Sam led 02/12/02 14 40 Recctved 02/13/02 07 35 <br /> Ethanol ND 500 ug/l 1 2020057 02/20/02 02/20/02 EPA 8260B <br /> 1,2-Dibromoethane ND 2 0 ^ ^ ++ <br /> 1,2-Dichloroethane ND 2 0 <br /> Di-isopropyl ether ND 2 0 " <br /> Ethyl tert-butyl ether ND 2 0 <br /> Methyl tert-butyl ether ND 2 0 <br /> Tert-amyl methyl ether ND 2 0 " <br /> Tert-butyl alcohol ND 100 <br /> Surrogate 1 2-Dichloroethane-d9 956% 70-130 " <br /> Surrogate Toluene-d8 992% 70-130 <br /> 0 <br /> to Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the chain <br /> of cuslody document This analytical i epos t must be rept oduced in as entirety <br /> Page 4 of 16 <br />