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h iRi <br /> 1551 Industrial Road <br /> Sequoia San Carlos CA 94070 <br /> Analytical <br /> 41) (650)2329090 <br /> TQF FAX(650)232 9612 <br /> www sequoialabs con, <br /> Gettler-Ryan/Geostrategies(1) Project Tosco(l) <br /> 6747 Sierra Court,Suite 1 Project Number Tosco#4409,Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 05/03/02 10 10 <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-1 (L204085-02)Water Sampled 04/18/02 10 05 Received 04/18/02 18.15_ <br /> Ethanol ND 500 ug/l . 1 2040064 04122102 04/22/02. EPA 8260B ~~ <br /> 1,2-Dtbromoethane ND 20 ' <br /> 1,2-Dichloroethane ND 20 <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 " <br /> Methyl teri-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 <br /> Tert-butyl alcohol ND 100 <br /> Surrogate 1,2-Dichloroethane-d4 113% 70-130 <br /> Surrogate Toluene-d8 988% 70-130 <br /> MW-2(L204085-03)Water Sampled 04/18/02 09 30 Received 04/18/02 18 15 <br /> Ethanol ND 500 ugll 1 2040064 04/22/02 .04/22102 EPA 82608 <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-0 115% 70-130 " <br /> Surrogate Toluene-d8 998% 70-130 <br /> MW-3(1-204085-04)Water Sampled 04/18/02 11_10 Received 04/18/02 l8 15 _ <br /> Ethanol ND 500 ugA 1 2040064 04/22/02 04/22/02 EPA 8260B <br /> 1,2-Dtbromoethane ND 20 " <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 33 2 0 <br /> Tert-amyl methyl ether ND 2 0 <br /> Tert-bury] alcohol ND 100 " <br /> Surrogate 1,2-Dichloroethane-d4 116% 70-130 <br /> Surrogate Toluene-d8 990% 70-130 <br /> Sequoia Analytical- San Carlos The i esults in this report apply to the samples analyzed in accordance with the chain <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 6 of 16 <br />