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404 N Wlget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> (925)988-9600-96M <br /> FAX(925)988-9673 <br /> -5 Analytical w%ww sequolalabs corn <br /> Gettler RYan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco# 11192 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 18-Jan-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 Lunt Notes <br /> Batch lAOS024-EPA 5030B{PIT] <br /> Matrix Spike(1A08024-MSI) Source W012638-01 Prepared&Analyzed 08-Jan-01 <br /> Methyl tert-butyl ether 412 20 Ug/l. 500 ND 824 60-150 <br /> Surrogate Dibromofluoromethane 480 Soo 960 50-150 <br /> Surrogate 1,2-Drchloroethane-d4 370 500 740 50-150 <br /> Matrix Spike Dup (1A08024-MSD1) Source W012638-01 Prepared&Analyzed 08-Jan-01 <br /> Methyl tent-butyl ether 433 20 USA 500 ND 866 60-150 497 25 <br /> Surrogate Dibromofluoromeihane 470 " 500 940 50.150 <br /> Surrogate 1,2 Dichloroethane-d4 3&0 Soo 76L 0 50-150 <br /> Ola Amlalj't1CaI-Walnut Creek The results in this repon apply to the samples analysed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety <br /> Page 6 of 7 <br />