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Sequoia Walnut <br /> H Wilane <br /> t Creek CA 94598 <br /> (925)988-96M <br /> FAX`925'9 <br /> Analytical www sequolalabs om abscom <br /> ` w <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite 7 Project Number Tosco 4 11193 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 04-Jan-01 10 26 <br /> Volatile Organic Compounds by EPA Metliod 8260B - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Luiuts RPD Limit Notes <br /> Batch OL18009-EPA 5030B [PIT] s <br /> Matrix Spike Dup(OL18009-MSD1) Source W012299-06 Prepared&Analyzed 18-Dec-00 <br /> T`13--Dichloroethene T_—--- T------590 ---- 2 0 —ugll 70 0—ND--84 3--60=140,3T45— 25--T -- <br /> Methyl Cert-butyl ether 450 20 500 ND 900 60-140 220 25 <br /> Benzene 590 20 500 ND 116 60-140 0 25 <br /> Trichloroethene 590 20 500 ND 116 60-140 174 25 <br /> Toluene 600 20 50 0 ND I20 60-140 0 25 <br /> Chlorobenzene 580 20 500 ND 116 60-140 3 51 25 <br /> Surrogate Dibromofluoromethane 490 - - 500 980 50.150 <br /> Surrogate 1 2Dchloroethane-d4 480 500 960 50-150 <br /> Surrogate Toluene-d8 480 500 960 50-150 <br /> Surrogate 4-Bromoflunrobenzene 460 500 920 50-150 <br /> i <br /> Sequoia 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 entire0 <br /> Page 20 of 27 <br /> `-�9 <br />