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Z i}N G <br /> 404 H Wiget Lane <br /> Sequoia Walnut Geek CA 94598 <br /> (925)988-9600 <br /> 4 t5- <br /> FAX{925)988-9673 <br /> Analytical "�"," �°lalab5 corn <br /> )- <br /> Aro <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite 7 Project Number Chevron# 9-3232 Reported <br /> Dublui CA,94568 Project Manager Deanna L Harding 13-Mar-01 07 46 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lttrut Units Level Result %REC Limits RPD Lumt Notes <br /> Batch 1B27013-EPA 5030B [PIT] <br /> Blank(IB27013-BLKI) Prepared 27-Feb-01 Analyzed 28-Feb-01 <br /> Ethanol ND 500 ugll <br /> tert-Butyl alcohol ND 50 " <br /> Methyl tent-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tett-butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 <br /> Surrogate DibromofTuoromethane 514 500 103 50-150 <br /> Surrogate 12-Dichloroethane-d4 417 500 834 50-150 <br /> Blank(1B27013-BLK2) Prepared&Analyzed 28-Feb-01 <br /> Ethanol ND 500 ug/l <br /> tcrt-Butyl alcohol ND 50 „ <br /> tort-butyl ether ND 20 <br /> propyl ether ND 20 " <br /> Ethyl telt-butyl ether ND 20 " <br /> tett-Amyl methyl ether ND 20 " <br /> Surrogate Dibromofluoromerhane 4&0 500 960 50-150 <br /> Surrogate I 1-Diehloroethane-d4 410 500 840 50-150 <br /> LCS(1B27013-BSI) Prepared 27-Feb-01 Analyzed 28-Feb-01 <br /> Methyl tett-butyl ether 414 20 ug/i 500 828 70430 <br /> Surrogate Dtbromojluoromethane 503 500 101 50-150 <br /> Surrogate 11-Drehloroethane-d4 412 500 824 50-150 <br /> LCS(IB27013-BS2) Prepared&Analyzed 28-Feb-01 <br /> Methyl tart-butyl ether 423 20 ug/l 500 846 70-130 <br /> Surrogate Dibromofluoromethane 483 500 966 50-150 <br /> Surrogate I,2-Dichloroethane-d4 414 500 828 50-150 <br /> S cola Analyucal-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Tips analytical report must be reproduced in its entirety <br /> Page 6 of 8 <br /> F <br />