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Gettler-Ryan/Geostrategies(1) Project: Tosco(1) <br /> 6747 Sierra Court,Suite J Project Number: Tosco#11195,Lathrop,CA Reported: <br /> Dublin CA,94568 Project Manager: Deanna Harding 05/25/01 14:01 <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 1050074-EPA 5030B [PIT] <br /> Blank(1050074-BLK1) Prepared&Analyzed:05/17/01 <br /> Ethanol ND 1000 ug/1 <br /> 1,2-Dibromoethane ND 2.00 " <br /> 1,2-Dichloroethane ND 2.00 " <br /> Di-isopropyl ether ND 2.00 " <br /> Ethyl tert-butyl ether ND 2.00 " <br /> Methyl tert-butyl ether ND 2.00 " <br /> Tert-amyl methyl ether ND 2.00 <br /> Tert-butyl alcohol ND 100 <br /> Surrogate:1,1 Dichloroethane-d4 44.9 50.0 89.8 76-114 <br /> Surrogate.Toluene-d8 53.6 50.0 107 88-110 <br /> i .•i <br /> :��nk(1080074-SLK2) Prepared&Analyzed: 05118/0 1 <br /> Ethanol ND 1000 ugJl <br /> 1,2-Dibromoethane ND 2.00 " <br /> 1,2-Dichloroethane ND 2.00 " <br /> Di-isopropyl ether ND 2.00 " <br /> Ethyl tert butyl ether ND 2.00 " <br /> Methyl tert-butyl ether ND 2.00 " <br /> Tert-amyl methyl ether ND 2.00 " <br /> Tertbutyl alcohol ND 100 <br /> Surrogate:1,2 Dichloroethane-d4 44.7 50.0 89.4 76-114 <br /> Surrogate:Toluene-d8 51.2 50.0 101 88-110 <br /> LCS(1050074-BSI) Prepared&Analyzed:05/17/01 <br /> Methyl tert-butyl ether 46.0 2.00 ug/1 50.0 92.0 70-130 <br /> Surrogate:l,1-Dichloroethane-d4 49.6 50.0 99.1 76-114 <br /> Surrogate:Toluene-d8 53.8 50.0 108 88-110 <br /> '3`equoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 15 of 20 <br />