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404 N W1get Lane <br /> Sequoia Walnut Creek,CA 94598 <br /> (925)988-9600 <br /> Analytical www <br /> (925)988-9673 <br /> sequolalabs cont <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 11-Jan-01 18 33 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lunit Units Level Result %REC Limits RPD Lieut Notes <br /> Batch 1A08024-EPA 5030B]PPI'] <br /> Matra Spike(1A08024-MSI) Source W012638-01 Prepared&Analyzed 08-Jan-01 <br /> Mcthyl tart-butyl ether 412 20 ugll 500 ND 824 60-150 <br /> Surrogate Dibromofluominedme 4&0 Soo 960 50.150 <br /> Surrogate 1,2Dichloroethane-d4 370 500 740 50-150 <br /> Matrix Spike Dup (IA08024-MSDI) Source W012638-01 Prepared&Analyzed 08-Jan-01 <br /> ]Methyl tert-butyl ether 433 20 ug4 500 ND 866 60-150 497 25 <br /> Surrogate Dibromq luoromethane 470 500 940 50-150 <br /> Surrogate 12-Drchloroedume-d4 38.0 500 760 50-150 <br /> S oia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. Tins analytical report must be reproduced in its entirety <br /> Page 5 of 7 <br />