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i <br /> dr ,. <br /> 404 N Wiget Lane <br /> S e qu o l a Walnut Geek,CA 94598 <br /> (925)988-9600 <br /> FAX(925)988-9673 <br /> Analytical www sequolalabs com <br /> ' Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite I Project Number Chevron# 9-6258 Reported <br /> Dublin CA,94568 Project Manager Deanna L Handing 21-Nov-00 07 54 <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 OK08027-EPA 5030B [P/T] <br /> Matrix Spike(OK08027-MSI) Source W011015-05 Prepared 08-Nov-00 Analyzed 09-Nov-00 <br /> Methyl tert-butyl ether 100 20 ug/l 500 55 900 60450 <br /> Surrogate Drbromofluoromethane 410 500 820 SO-150 <br /> Surrogale 12-Drchloroethane-d4 550 500 110 SO-150 <br /> Matrix Spike Dnp(OK08027-MSD1) Source WOII015-05 Prepared 08-Nov-00 Analyzed 09-Nov-00 <br /> Methyl terl-butyl ether 115 20 ug/l 500 55 120 60-150 140 25 <br /> Surrogate Drbromofluoromethane Soo 500 100 50-150 <br /> Surrogate 1 2-Drchloroerhane-d4 480 500 960 50-150 <br /> Batch OK09015-EPA 5030B [P/TJ <br /> Blank(OK09015-BLKI) Prepared&Analyzed 09-Nov-00 <br /> Ethanol ND 500 ug/1 <br /> tett-Butyl alcohol ND 50 <br /> Methyl tort-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> tart Amyl methyl ether ND 20 " <br /> Surrogate Drbromofluoromethane 52.0 500 104 SO-I50 <br /> Surrogate l,2-Drchloroedxme-d4 48.0 500 940 50.150 <br /> Blank(OK09015-BLKI) Prepared&Analyzed 10-Nov-00 <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 tat-butyl ether ND 20 " <br /> tart-Amyl methyl ether ND 20 " <br /> Surrogate Drbromofluoromethane 510 500 102 50.150 <br /> Surrogate 1 1 Dichloroetham-d4 510 Soo 102 50-150 <br /> Sequoia Analytical-Walnut Crede The results in this report apply to the samples analyzed in accordance with the chain o <br /> custody document 77as analytical report must be reproduced in its entirw <br /> Page 7 of 11 <br />