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Sequoia 1551 Industrial Road <br /> San Carlos CA 94070 <br /> AWAnalytical (650)232-9600 <br /> FAX(650)232-9612 <br /> www.sequoialabs.com <br /> .::IGettler-Ryan/Geostratepies(I) Project: Tosco(l) <br /> 6747 Sierra Court,Suite J Project Number: Tosco#11195 Reported: <br /> Dublin CA,94568 Project Manager: Deanna Harding 02/21/02 08:17 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporling <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Noles <br /> MW-4(L202058-05)Water Sampled:02/07/02 14:45 Received: 02/07/02 18:35 <br /> Ethanol ND 500 ug/1 1 2020045 02/13/02 02/13/02 EPA 8260B <br /> 1,2-Dibromoethane ND 2.0 " " ++ 11 <br /> 1,2-Dichloroethane ND 2.0 " +' ++ <br /> Di-isopropyl ether ND 2.0 " It it <br /> + <br /> Ethyl tert-butyl ether ND 2.0 <br /> Methyl tert-butyl ether 120 2.0 " " " " „ <br /> Tert-amyl methyl ether ND 2.0 " " " " It <br /> Tert-butyl alcohol ND 100 " " „ <br /> Surrogate:1,2-Dichloroethane-d4 115% 70-130 " <br /> Surrogate:Toluene-d8 98.8% 70-130 <br /> MW-5(L202058-06)Water Sampled:02/07/02 16:20 Received:02/07/02 18:35 <br /> Ethanol ND 17000 ug/l 33.33 2020039 02/12/02 02/12/02 EPA 8260E <br /> 1,2-Dibromoethane ND 67 " ++ 1. <br /> 1,2-Dichloroethane ND 67 " ++ <br /> ?jsopropyl ether ND 67 " ++ <br /> nyl tert-butyl ether ND 67 <br /> Methyl tert-butyl ether 3900 67 <br /> Tert-amyl methyl ether ND 67 " <br /> Tert-butyl alcohol ND 3300 " ++ <br /> Surrogate:1,2-Dichloroethane-d4 117% 70-130 <br /> Surrozate:Toluene-d8 100% 70-130 N n <br /> MW-6(L202058-07)Water Sampled:02/07/02 14:10 Received:02/07/02 18.35 <br /> Ethanol ND 500 ug/l 1 2020030 02/12/02 02/12/02 EPA 8260B <br /> 1,2-Dibromoethane ND 2.0 " ° " <br /> 1,2-Dichloroethane ND 2.0 it " + <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 III % 70-130 It " ++ <br /> Surrogate:Toluene-d8 98.8% 70-130 " +' <br /> Analytical-San Carlos The results in this report apply to the samples analyzed in accordance with the chain <br /> ' of custody document. This analytical report must be reproduced in its entirety. <br /> Page 3 of 17 <br />