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404 N Wlget Lane <br /> Sequoia Walnut Creek, 94598 <br /> (925)98 8-96p0 <br /> FAX(925)988-%73 <br /> Analytical www sequoiaiabs corn <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco#! 11192 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 11-Jan-01 18 33 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Luzut Units Level Result %REC Lniuts RPD Lint Notes <br /> Batch 1AO8024-EPA 5030B[PIT] r <br /> Blank(1A08024-BLK1) } Prepared&Analyzed 08-Jan-01 <br /> Ethanol ND 500 ug/l <br /> t <br /> tert-Butyl alcohol ND 50 " <br /> Methyl tert-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tent-butyl ether ND 20 " <br /> tent-Amyl methyl ether ND 20 " <br /> Surrogate Dibromofluoromethane 470 500 940 50-150 <br /> Surrogate 1 2-Dichloroethane44 390 500 7&0 50-150 <br /> Blank(1A08024-BLK2) Prepared&Analyzed 09-Jan-01 <br /> Ethanol ND 500 ug/I <br /> tent-Butyl alcohol ND 50 " <br /> Methyl tert-butyl ether ND 20 <br /> Dr-isopropyl ether ND 20 " <br /> Ethyl tert butyl ether ND 20 " <br /> r <br /> tert-Amyl methyl ether ND 20 " <br /> Surrogate Dibromofluoromethane 45 0 Soo 900 50.150 <br /> Surrogate 1 2 Dichloroethane-d4 380 500 760 50-150 <br /> LCS(1AO8024-BSI) Prepared 8c Analyzed 08-Jan-01 <br /> Methyl tert-butyl ether 413 20 ug/1 500 926 70-130 <br /> Surrogate Dibromofluoromethane 480 Soo 960 50-150 <br /> Surrogate 1 2-Drchloroethane-d4 380 Soo 760 50-150 <br /> LCS(IA08024-BS2) Prepared&,Analyzed 09-Jan-01 <br /> Methyl tort-butyl ether 390 20 ug/1 500 780 70-130 <br /> Surrogate Dibromofluoromethane 470 Soo 940 SO-150 <br /> Surrogate 1 1-Dichlaroethane-d4 380 500 760 50-150 <br /> Sequoia Analytical-walnut Creek The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced in its enti0 <br /> Page 4 of 7 <br />