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Sequoia 1551 a]Road <br /> San CarlosrlosCA 94070 <br /> Analytical (650)232 9612 <br /> 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(former BP)#11192,Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 03/01/02 1119 <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-8(1-202098-08)Water Sampled 02/18/02 11 00 Received 02/1910207 40 _ <br /> Ethanol ND 500 ug/l 1 2020079 02/25/02 02/25/02 EPA 8260B <br /> 1,2-Dibromoethane ND 2 0 <br /> 1,2-Dichloroethane ND 2 0 <br /> Di-isopropyl ether ND 2 4 <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 104% 70-130 <br /> Surrogate Toluene-d8 990% 70-130 <br /> MW-9(L202098-09)Water Sampled 02/18/02 12 15 Received 02/19/02 07 40 <br /> Ethanol ND 500 ug/1 1 2020079 02/25/02 02/25/02 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 Cert-butyl ether 2 7 2 0 " <br /> Tert-amyl methyl ether ND 2 0 " <br /> Tert-butyl alcohol ND 100 <br /> Surrogate 1,2-Dichloroethane-d4 100% 70-130 " <br /> Surrogate Toluene-d8 101% 70-130 " <br /> MW-10(1-202098-10)Water Sampled 02/18/0211 40 Received 02/19/02 07 40 _ <br /> Ethanol - ND 500 ug/l 1 2020077 .-02/22/02 02/22/02 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 115_% 70-130 n _ <br /> Surrogate Toluene-d8 101 % 70-130 ' <br /> Sequoia Analytical - San Carlos The results in this i eport apply to the samples analy2ed in accordance with the sham <br /> custody document This analytical report must be rept oduced in its entirety <br /> Page 8 of 14 <br />