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Sequoia 1551 Carlos <br /> nal Road <br /> ei) <br /> San (650 23 -9600 <br /> + ► Analytical (650)232.9600 <br /> FAX{650}232 4612 <br /> www sequwalabs corn <br /> Gettler-Ryan/Geostrategies(1) Project Tosco(1) <br /> 6747 Sierra Court, Suite J Prosect Number Tosco(former$P)#11192,Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 03/01/02 13 39 <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 (L202098-02)Water Sampled 02/18/02 15 35 Received 02119102.07 40 - <br /> Ethanol ND 1200 ug/l 2 5 2020077 02122102 02/22/02 EPA 8260E <br /> 1,2-Dibromoethane ND 5 0 <br /> 1,2-Dichloroethane ND 5 0 <br /> Di-isopropyl ether ND 5 0 " <br /> Ethyl tert-butyl ether ND 5 0 <br /> Methyl tert-butyl ether 5 4 5 0 " <br /> Tert-amyl methyl ether ND 5 0 <br /> Tert-butyl alcohol 3600 250 " <br /> Surrogate 1,2-Dtchloroethane-d4 105% 70-130 " <br /> Surrogate Toluene-d8 101 % 70-130 " <br /> _MW-3 (L202098-03)Water Sampled 02/18/02 17 35 Received 02/19/02 07 40 <br /> Ethanol ND 120000 ug/1 250 2020077 02/22/02 02/22/02 EPA 8260B <br /> 1,2-Dibromoethane ND 250 <br /> 1,2-Dichloroethane ND 250 <br /> Di-isopropyl ether ND 250 <br /> Ethyl tert-butyl ether ND 250 " <br /> Methyl tert-butyl ether 460 250 <br /> Teri-amyl methyl ether ND 250 <br /> Tert-butyl alcohol 240000 25000 " " " <br /> Surrogate 1,2-Dichloroethane-d4 109% 70-130 " <br /> Surrogate Toluene-d8 100% 70-130 " <br /> MW-4(L202098-04)Water Sampled 02/18/02 14 55 Received 02/19/02 07 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 0 " <br /> Ethyl tert-butyl ether ND 2 0 " <br /> Methyl tert-butyl ether 55 2 0 <br /> Tert-amyl methyl ether ND 2 0 <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 1,2-Dtchloroethane-d4 _ 106% 70-130 _ <br /> Surrogate Toluene-d8 100% 70-130 " <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the chat <br /> custody document This analytical i eport must be reproduced in its entirety <br /> Page 6 of 14 <br />