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i ' • 404 N Wiget Lane <br /> • Walnut Creek CA 94598 <br /> S e qu o l a (925)988-9600 <br /> FAX(925)988-%73 <br /> Analytical www sequolalabs coin <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Saute J Project Number Chevron# 9-6171 Reported <br /> Dublin CA,94568 Project Manager Deanna L Hartung 08-Jun-00 17 18 <br /> Volatile Organic Compounds by EPA Method 8260A - 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 OE27001-EPA 5030B PIT] <br /> Matra Spike(OE27001-MSI) Source W005389-05 Prepared&Analyzed 26-May-00 <br /> Methyl tert-butyl ether 583 20 ug/1 500 ND 117 60-150 <br /> Surrogate Dibromofluoromethane 460 500 920 50450 <br /> Surrogate 12-Dichloroethane-d4 430 Soo 860 50-ISO <br /> Matrix Spike Dup(OE27001-MSDI) Source W005389-05 Prepared&Analyzed 26-May-00 <br /> Methyl tart-butyl ether 66 1 20 ug/1 500 ND 132 60-150 125 25 <br /> Surrogate Dibromofluoromeihane 480 500 960 50-150 <br /> Surrogate 12-Dtchloroethane-d4 430 500 860 50-150 <br /> • <br /> S is Analytical-Walnut Creek The results in this report apply to the samples analyzed m accordance with the chalet of <br /> custody document Tlas analyhcal report must be reproduced in its enwr& <br /> Page 8 of 9 <br />