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•' 404 N Wlget Lane <br /> Walnut Geek.CA 94598 <br /> Sequoia (4Z5)988-9600 <br /> i!TN w FAX(925)988-%73 <br /> Analytical www�uaala�ern <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Slute J Project Number Chevron#9-3232 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 16-Jan-01 18 13 <br /> Volatile Organic Compounds by EPA Method 8260E -Quality Control <br /> Sequoia Analytical Walnut Creek <br /> Reportmg Spike Source %REC RPD <br /> Analyte Result Limit Umts Level Result %REC Limits RPD Limit Notes <br /> Batch 1A03015-EPA 5030B[PIT] <br /> Blank(1A03015-BLKI) Prepared&Analyzed 02-Jan-01 <br /> Ethanol ND 500 ugn <br /> ted-Butyl alcohol ND 50 <br /> Methyl tart butyl ether ND 20 <br /> Dr-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 <br /> tert-Amyl methyl other ND 20 " <br /> Surrogate Dtbromofluoromethane 510 I' 500 101 50-150 <br /> Surrogate 1 1-Drchloroethane44 490 500 980 50-150 <br /> Blank(1A(k3015-BLK2) Prepared&Analyzed 03-Jan-01 <br /> Ethanol ND 500 ug/1 <br /> 4i.t-butylath-r <br /> l alcohol ND 50 <br /> ND 20 <br /> Di-isopropyl ether ND 20 <br /> Ethyl tett-butyl ether ND 20 " <br /> tort-Amyl methyl ether ND 20 " <br /> Surrogate Dtbromofluoromethane 450 500 900 50-150 <br /> Surrogate 12-Dtchloroethane-d4 390 500 780 50-150 <br /> LCS(1A03015-BSI) Prepared&Analyzed 02-Jan-01 <br /> Methyl tent-butyl ether 444 20 ug/1 500 888 70-130 <br /> Surrogate Drbromofluoromethane 4&0 500 960 50-I50 <br /> Surrogate I,1-Dtchloroethane-d4 440 500 88.0 50-150 <br /> LCS(1A03015-BS2) Prepared&Analyzed 03-Jan-01 <br /> Methyl tert-butyl ether 488 20 ug/1 500 976 70-130 <br /> Surrogate iTl lomofluoromethane 48 0 50 0 900 50.150 <br /> Surrogate I l Dtchloroethane-d4 400 500 <br /> 80 0 so-ISO <br /> i2 cal-wahwt Creek The results to thrs report apply to the samples analyred in accordance with the churn of <br /> custody document.Thus analytical report must be reproduced in rte entnery <br /> Page 6 of 8 <br />