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551 <br /> ad <br /> Sequoia anCarldustrialR 70 <br /> San Carlos CA 94470 <br /> (650)232-9600 <br /> a- ) <br /> W Analytical FAX(650)232-9612 <br /> www.sequoialabs.wm <br /> Gettler-Ryan/Geostrategies(I) Project: Tosco(1) <br /> 6747 Sierra Court,Suite I Project Number: Tosco#11195,Lathrop,CA Reported: <br /> Dublin CA,94568 Project Manager: Deanna Harding 12/10/01 19:11 <br /> Volatile Organic 8 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 1110104-EPA 5030B JP/TJ <br /> Blank(1110104-BLKI) Prepared&Analyzed: 11/29/01 <br /> Ethanol ND 500 ugll <br /> 1,2-Dibromoethane ND 1.0 " <br /> 1,2-Dichloroethane ND 1.0 " <br /> Di-isopropyl ether ND 1.0 " <br /> Ethyl tert-butyl ether ND 1.0 " <br /> Methyl tert-butyi ether ND 1.0 " <br /> Tert-amyl methyl ether ND 1.0 " <br /> Teri-butyl alcohol ND 20 " <br /> Surrogate:l,2-Dichloroethane-d4 25.1 25.0 100 70-130 <br /> Surrogate: Toluene-d8 23.8 15.0 95.2 70-130 <br /> Blank(1130104-BLK2) Prepared&Analyzed: 11/30/01 <br /> Ethanol ND 500 ugll <br /> 1,2-Dibmmoethane ND 1.0 <br /> 1,2-Dichloroethane ND 1.0 <br /> Di-isopropyl ether ND 1.0 " <br /> Ethyl tett-butyl ether ND 1.0 <br /> Methyl tert-butyl ether ND 1.0 " <br /> Teri-amyl methyl ether ND 1.0 " <br /> Tert-butyl alcohol ND 20 " <br /> Surrogate:l,2-Dichloroethane-d4 24.1 25.0 964 70-130 <br /> Surrogate:Toluene-d8 24.8 15.0 99.2 70-130 <br /> LCS(1110104-BSI) Prepared&Analyzed: 11/29/01 <br /> Methyl tert-butyl ether 50.7 1.0 ug/I 50.0 101 70-130 <br /> Surrogate: l,2-Dichloroethane-d4 27.2 25.0 109 70-130 <br /> Surrogate:Toluene-d8 24.7 25.0 98.8 70-130 <br /> Sequoia Analytical -San Carlos The resuAs in this report apply to the samples anahzed in accordance with the chain o..' ?} <br /> cuslody document. This analytical report must be reproduced in its entirely. - <br /> Page 16 of 18 <br />