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404 N Wiget lane <br /> Walnut Creek CA 94598 <br /> Sequoia (925)988-96 ° <br /> 4 FAX(925)988-%73 <br /> Analytical _ www sequoialabs`°m <br /> Gettler Ryan,Inc -Dublin Protect Chevron <br /> 6747 Sierra Court Suite J Protect Number Chevron# 9-3232 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 13-]tin-01 09 07 <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 Limit Notes <br /> Batch 1E30011 -EPA 5030B (PIT) <br /> Blank(IE30011-BLK4) Prepared&Analyzed 06-Jun-01 <br /> Ethanol ND 500 ug/1 <br /> tent-Butyl alcohol ND 20 <br /> Methyl tert-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 <br /> tent-Amyl methyl ether ND 20 <br /> Surrogate ,Dibromofluoromethane 470 500 940 50-150 <br /> Surrogate 12 Dichloroethane-d4 470 500 940 50-150 <br /> LCS(11E30011-BSI) Prepared&Analyzed 30-May-01 <br /> Methyl tert-butyl ether 510 20 ugll 500 102 70-130 <br /> ate Dibromofluoromethane 520 500 104 50-150 <br /> gate 1 2 Dichloroeihane-d4 550 500 110 50-150 <br /> LCS(JE30011-BS2) Prepared&Analyzed 05-Jun-01 <br /> Methyl tert-butyl ether 223 20 ug/i 250 892 70-130 <br /> Surrogate Dtbroinofluoromethane 260 250 104 50-150 <br /> Surrogate 12-Dichloroethane-d4 230 250 920 50-150 <br /> LCS(IE30011-BS3) Prepared&Analyzed 07-Jun-01 <br /> Methyl tert-butyl ether 234 20 ugtl 250 936 70-130 <br /> Surrogate Dibromofluoromethane 250 250 100 50-150 <br /> Surrogate 12Dichloroethane-d4 240 250 960 50-150 <br /> LCS(IE30011-BS4) Prepared&Analyzed 06-Jun-01 <br /> Methyl tert-butyl ether 394 20 ug11 500 788 70-130 <br /> Surrogate Dibromofluoromethane 490 500 980 50-150 <br /> Surrogate 1 1 Dichloraethane-d4 480 Soo 960 50-150 <br /> ola AnalytlCal-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 entirety <br /> Page 8 of 10 <br /> .4� <br />