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, <br /> 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 1050077-EPA 5030B [P/TJ <br /> Blank(1050077-BLK1) Prepared&Analyzed:05/18/01 <br /> Ethanol ND 1000 ug/1 <br /> 1,24Dtbromoethane 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: 1,2-Dichloroelhane-d4 44.7 50.0 89.4 76-114 <br /> Surrogate:Toluene-d8 51.2 50.0 102 88-110 <br /> Blank(1050077-BLK2) Prepared&Analyzed:05/19/01 <br /> Ethanol ND 1000 ugll <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 tent-butyl ether ND 2.00 " <br /> Tert-amyl methyl ether ND 2.00 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate:1,2-Dichloroethane d4 48.3 50.0 96.6 76-114 <br /> Surrogate:Toluene-d8 53.2 50.0 106 88-110 <br /> LCS(1050077-BSI) Prepared&Analyzed:05/18/01 <br /> Methyl tert-butyl ether 45.2 2.00 ug/l 50.0 90.4 70-130 <br /> Surrogate:1,1-Dichloroethane-d4 47.0 50.0 94.0 76-114 <br /> Surrogate:Toluene d8 50.6 50.0 101 88-110 <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the ch%.. <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 18 of 20 <br />