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Sequoia an Industria!Road <br /> San <br /> Carlos CA 94070 <br /> Analytical (650)232-9600 <br /> 7 FAX(650)232-9612 <br /> www sequoialabs com <br /> Gettler-Ryan/Geostrategies(1) Project Tosco(1) <br /> 6747 Sierra Court, Suite J Project Number Tosco(Unocal)SS-46981 Stockton,CA Reported <br /> Dublin CA, 94568 Project Manager Deanna Harding 09/27/01 10 19 <br /> _- - = Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B <br /> = <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MV1'-8(L109080-08)Water Sampled. 09/12/01 14 10 Received 09/13/01 19 30 <br /> Ethanol ND 1000 ug/l 1 1090069 09/19/01 09/19/01 EPA 8260B <br /> 1 2-Dibromoethane ND 20 " <br /> 1 2-Dichloroethane ND 20 " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 <br /> Methyl tert-butyl ether ND 20 <br /> Tert-amyl methyl ether ND 20 " <br /> i <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 1,2-Dichloroethane-d4 106% 76-114 " <br /> Surrogate Toluene-d8 994% 88-110 " <br /> MW-9(1-109080-09)Water Sampled 09/12/01 11 55 Received 09/13/01 19 30 <br /> Ethanol ND 1000 ug/i 1 1090069 09/19/01 09/19/01 EPA 8260B <br /> 1 2-Dibromoethane ND 20 " <br /> 1,2-Dichloroethane ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> Methyl ten-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 " <br /> Tert-butyl alcohol ND 100 <br /> Surrogate 1,2-Dichloroethane-d4 106% 76-114 " <br /> Surrogate Toluene-d8 101 % 88-110 " <br /> MW-11 L109080-10 Water Sampled 09/12/01 12 45 Received 09/13/01 19 30 <br /> Ethanol ND 1000 ug/l 1 1090069 09/19/0) 09/19/01 EPA 8260B <br /> 1,2-Dibromoethane ND 20 " <br /> 1,2-Dichloroethane ND 20 " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 " <br /> Methyl tert-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 1,2-Dichloroethane-d4 )08% 76-114 " <br /> Surrogate Toluene-d8 986% 88-110 " <br /> Sequoia Analytical-San Carlos The results in this report apply to the samples analyed in accordance hath the chain <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 10 of 21 <br />