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404 N Wlget Lane <br /> Sequoia Walnut Geek C 94598 <br /> 4 (925)988 8-9G00 <br /> FAX(925)988-9673 <br /> Analytical www seq°OIalabs corn <br /> Gettler Ryan,Inc -Dublm Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco# 11192 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 18-Jan-01 07 35 <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 Uruts Level Result %REC Limits RPD Luna Notes <br /> Batch OL28009-EPA 5030B[P/T] <br /> Matrix Spike(OL28009-MSI) Source W012567-02 Prepared&Analyzed 08-Jan-01 <br /> Methyl tett-butyl ether 447 20 ug/l 500 ND 894 60-150 <br /> Surrogate Dibromofluoromethane 470 500 940 50-150 <br /> Surrogate 1,2 Dzchloroethane-d4 370 500 740 50.150 <br /> Matrix Spike Dup(OL28009-MSD1) Source W012567-02 Prepared&Analyzed 08-Jan-01 <br /> Methyl tert butyl ether 461 20 ug/l 500 ND 922 60-150 309 25 <br /> Surrogate Dibromofluoromethane 470 500 940 50-150 <br /> Surrogate 1,2 Dichloroethane-d4 360 500 710 50-150 <br /> OFla Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 8 of 9 <br />