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404 N Wiget Lane <br /> Sequoia Walnut Creek,CA 94598 <br /> -9600 <br /> 4 a- ) (925)988-9600 <br /> FAX(925) 988-9673 <br /> Analytical www sequolalabs com <br /> aw <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 10-May-01 10 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 Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch lE07003-EPA 5030E(P/T) <br /> LCS(1E07003-BS2) Prepared&Analyzed 08-May-01 <br /> Methyl tert-butyl ether 45 2 20 ug/1 500 904 70-130 <br /> Surrogate Dibromofluoroniethane 431 500 862 50-150 <br /> Surrogate 1 2-DichloroeMane-d4 386 500 772 50-150 <br /> Matrix Spike(IE07003-MSI) Source W104572-02 Prepared 07-May-01 Analyzed 08-May-01 <br /> Methyl tent-butyl ether 413 20 ug/I 500 ND 926 60-150 <br /> Surrogate Dibroinofluoromethane 455 500 910 50-150 <br /> Surrogate 11 Dechloroethane-d4 383 500 766 50-150 <br /> Matrix Spike Dup (IE07003-MSD1) Source W104572-02 Prepared 07-May-01 Analyzed 08-May-01 <br /> Methyl tent-butyl ether 49 0 20 ug/1 500 ND 980 60-150 171 25 <br /> ale DibromoJluorornethane 452 500 90 4 50-150 <br /> gate 1 1 Dichloroetham-d4 405 500 810 50-150 <br /> oia Analytical -Walnut Creek The results in this report apply to the sanples analyzed in accordance with the chane of <br /> custody document Thn analytical report must be reproduced in its entrretj <br /> Page 8 of 11 <br />