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ih <br /> 1551 Industrial Road <br /> Sequoia San Carlos CA 94070 <br /> (650)232-9600 <br /> �► Analytical FAX(650)232-9612 <br /> www sequoialabs corn <br /> tler-Ryan/Geostrategies(I) Prosect Tosco(1) <br /> 7 Sierra Court, Suite J Project Number Tosco#101205(Circle K),Lathrop,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 02/14/02 12 09 <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-I (L201127-02)Water Sampled 01/29/02 13 15 Received 01_/_3_0102 08 55 R-05 <br /> Ethanol ND 5000 ug/l 10 2020001 02/01/02 02/01/02 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 1000 " <br /> Surrogate 1 2-Dichloi oethane-d4 107% 70-130 <br /> Surrogate Toluene-d8 972% 70-130 <br /> MW-2 (L201127-03)Water Sampled 01/29/02 12 40 Received 01/30/02 08 55 _ <br /> Ethanol ND 500 ugA 1 2020001 02/01/02 02/01/02 EPA 8260B <br /> 1,2-Dibromoethane ND 20 " <br /> 1,2-Dichloroethane ND 20 <br /> JWopropyl ether ND 20 <br /> ten-butyl ether ND 2 0 " <br /> Methyl tert-butyl ether 53 20 <br /> Tert-amyl methyl ether ND 20 <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 1,2-Dichloroethane-d4 104% 70-130 <br /> Surrogate Toluene-d8 960% 70-130 <br /> MW-3(L201127-04)Water Sampled 01/29/0211 35 Received 01/30/02 08 55 <br /> Ethanol ND 500 ugA 1 2020001 02/01/02 02/01/02 EPA 8260E <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-d4 944% 70-130 " « <br /> Sutiogate Toluene-d8 928% 70-130 " <br /> to Analytical - San Carlos The results in this report apply to the samples analvzed in accordance with the chain of <br /> custody document This analytical i epoi t must be i epi oduced in its entu ety <br /> Page 6 of 1 I <br />