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Sequoia 1551 Industrial Road <br /> CD. <br /> San Carlos CA 94074 <br /> AwAnalytical (550)232-9600 <br /> FAX(bSo)232-9512 <br /> www.sequoialabs.com <br /> �ttler-RVan/GeostrateRies(I Project: Tosco(I) <br /> t 47 Sierra Court,Suite 1 Project Number: Tosco#11195 Reported: <br /> Dublin CA,94568 Project Manager: Deanna Harding 02/21/02 08:17 <br /> Volatile Organic S Oxygenated Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical-San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2020045-EPA 5030B IP/Tl <br /> Blank(2020045-BLK1) Prepared&Analyzed:02/13/02 <br /> Ethanol ND 500 ug/l <br /> 1,2-Dibromoethane ND 1.0 " <br /> 1,2-Dichloroethane ND 1.0 " <br /> Di-isopropyl ether ND 1.0 <br /> " <br /> Ethyl tert-butyl ether ND 1.0 " <br /> Methyl tert-butyl ether ND 1.0 " <br /> Tert-amyl methyl ether ND 1.0 " <br /> Tert-butyl alcohol ND 20 " <br /> Surrogate: l,2-Dichloroethane-d4 51.3 50.0 103 70-130 <br /> Surrogate: Toluene-d8 47.8 50.0 95.6 70-130 <br /> Blank(2020045-BLK2) - T Prepared&Analyzed:02114/02_ <br /> Ethanol ND 500 ug/l <br /> libromoethane ND 1.0 " <br /> IX Dichloroelhane ND 1.0 " <br /> Di-isopropyl ether ND 1.0 " <br /> Ethyl tert-butyl ether ND 1.0 " <br /> Methyl(ert-butyl ether ND 1.0 " <br /> Tert-amyl methyl ether ND 1.0 " <br /> Tert-butyl alcohol ND 20 " <br /> Surrogate: l,2-Dichloroethane=d4 56.0 50.0 112 70-130 <br /> Surrogate: Toluene-d8 49.0 50.0 98.0 70-130 <br /> LCS(2020045-BS]) Prepared&Analyzed:02/13/02 <br /> Methyl tert-butyl ether 47.0 1.0 ug/I 50.0 94.0 70-130 <br /> Surr•ogate:1,2-Dichloroethane-d4 51,9 50.0 104 70-130 <br /> Surrogate: Toluene-d8 47.4 50.0 94.8 70-130 <br /> S<< :is Analytical-San Carlos The results in this repor t apply to the samples analyzed in accordance wish the chain <br /> of custody document. This analytical report must be reproduced in its entirety. <br /> Page 13 of 17 <br /> i <br /> i <br />