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Sequoia 1551 Industrial Road <br /> San Carlos CA 94070 <br /> Analytical (650)232-9600 <br /> FAX(650)232-9612 _ <br /> - www.sequoialabs.com <br /> Gettier-Rvan/Geostrategies(1) Project: Tosco(1) <br /> 6747 Siena Court,Suite J Project Number: Tosco#11195 Reported: i <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 /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1 (1.202058-02)Water Sampled:02/07/02 15:50 Received: 02/07/02 18:35 <br /> Ethanol ND 8300 ugA 16.67 2020030 02/13/02 02/11/02 EPA 8260B <br /> 1,2-Dibromoethane ND 33 " <br /> 1,2-Dichloroethane ND 33 <br /> Di-isopropyl ether ND 33 " <br /> Ethyl tert-butyl ether ND 33 <br /> Methyl tert-butyl ether 1800 33 <br /> Tert-amyl methyl ether ND 33 " <br /> Tert-butyl alcohol ND 1700 <br /> Surroeate:1,2-Dichloroethane-d4 118% 70-130 IF <br /> " IF <br /> Surrogate: Toluene-d8 96.0% 70-130 IF " n <br /> MW-2(L202058-03)Water_Sampled:0210710215:15 Received:02/07/02 18:35 <br /> Ethanol ND 2500 ugA 5 2020030 02/11/02 02/11/02 EPA 8260B <br /> 1,2-Dibromoethane ND 10 " " " ^ " 11 <br /> 1,2-Dichloroethane ND 10 " <br /> Di-isopropyl ether ND 10 OF <br /> Ethyl tert-butyl ether ND 10 " <br /> Methyl Cert-butyl ether 550 10 " OF <br /> Tert-amyl methyl ether ND 10 " " " " " 11 <br /> Tert-butyl alcohol ND 500 " " " " " OF <br /> Surrogate:1,2 Dichloroethane-d4 120% 70-130 Of <br /> Surrogate: Toluene-d$ 97.2% 70-130 O " <br /> MW-3 (L202058-04)Water _Sampled:02/07/02 16:50 Received:02/07/02 18:35 <br /> Ethanol ND 17000 ugA 33.33 2020030 02/12/02 02/12/02 EPA 8260B <br /> 1,2-Dibromoethane ND 67 " " " " " 11 <br /> 1,2-Dichloroethane ND 67 " „ <br /> Di-isopropyl ether ND 67 IF <br /> " " <br /> Ethyl tert-butyl ether ND 67 " 1 <br /> It <br /> Methyl tert-butyl ether 3800 67 If <br /> " " <br /> Tert-amyl methyl ether ND 67 " <br /> Tert-butyl alcohol ND 3300 " If " <br /> Surrogate_ 1,2-Dichloroethane-d4 113% 70-130 " " Or IF <br /> Surrogate: Toluene-d8 101 % 70-130 " " IF IF <br /> Sequoia Analytical-San Carlos The results in this report apply to the samples analyzed in accordance with the ci <br /> ofcustody document. This analytical report must be reproduced in its entirety. <br /> Page 2 of 17 <br />