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404 N Wlget Lane <br /> Sequoia Walnut Creek C 94598 <br /> (925)988-9600 <br /> JFAX(925) <br /> Analytical www sequollabs alabs c 73 <br /> coni <br /> 00 <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 18-Jan-01 07 35 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Lurut Notes <br /> Batch OL28009-EPA 5030B []?IT] <br /> Blank(OL28009-BLKI) Prepared&Analyzed 27-Dec-0O <br /> Ethanol ND 500 ug/1 <br /> tert-Butyl alcohol ND 50 " <br /> Methyl tert-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tort-butyl ether ND 20 " <br /> tert-Amyl methyl ether ND 20 " <br /> Surrogate Dibromofluorometha ne 480 500 96.0 50-150 <br /> Surrogate 11-Dtehloroethaw-d4 450 500 900 50-150 <br /> Blank(OL28009-BLK2) Prepared&Analyzed 28-Dec-00 <br /> Ethanol ND 500 ug/1 <br /> to Butyl.alcohol ND 50 <br /> 1 tart-butyl ether ND 20 <br /> Di-tsopropyl other ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> tent-Amyl methyl ether ND 20 " <br /> Surrogate Dibroomofluoromethane Soo 500 100 50.150 <br /> Surrogate 1 1-Dichloroethane-d4 480 500 960 50-150 <br /> Blank(OL28009-BLK3) Prepared&Analyzed 29-Dec-00 <br /> Ethanol ND 500 ug/l <br /> Cert-Butyl alcohol ND 50 <br /> Methyl tent-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl ted-butyl ether ND 20 " <br /> tert-Amyl methyl ether ND 20 " <br /> Surrogate Dibromofluonomethane 450 " 500 900 50-150 <br /> Surrogate 12-Dichloroethane-d4 380 500 760 50-150 <br /> is Analytreal-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document.Thus analytical report must be reproduced in its entirety <br /> Page 6of9 <br />