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404 N Wiget Lane <br /> Walnut Creek CA 94598 <br /> Sequoia (925)988- <br /> FAX(925)988-96%7373 <br /> 1 4 <br /> www sequoialabs corn <br /> i!-D— Analytical <br /> Wtiler Ryan,Inc -Dublin Project Tosco <br /> ProlectNumber Tosca# 11193 Reported <br /> 6747 Sierra Court Suite J 04-Jan-01 10 26 <br /> Dublin CA,9456$ Protect Manager Doug Lee <br /> Volatile Organic Compounds by EPA Method 8260B -Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte <br /> Result Lurut Units Level Result %REC Limits RPD Ltrnut Notes <br /> Batch OLIS009-EPA 5030B [P1'17 <br /> prepared&Analyzed 1$-Dec-00 <br /> Blank(OL18009-BLK2) 20 ug/I <br /> Dichiorodrfluoromethane ND <br /> ND 20 " <br /> Chloromethane „ <br /> ND 20 <br /> Vinyl chlonde „ <br /> ND 50 <br /> Bromomethane „ <br /> ND 20 <br /> Chloroethane „ <br /> ND 20 <br /> Tnchlorotluoromethane 20 <br /> „ <br /> 1,1-Dichloroethene ND <br /> ND ]0 <br /> Methylene chlonde 2 0 <br /> Methyl tert-butyl ether ND „ <br /> ND 20 <br /> trans-l,2-Dichloroethene 20 <br /> „ <br /> 1,1-Dwhioroethane ND <br /> ND 50 „ <br /> 2,2-Dichloropropane 20 „ <br /> 1,2-Dichloroethene ND <br /> ND 20 „ <br /> 0-mochlorometh—e „ <br /> ND 20 <br /> Chloroform ND 20 <br /> 1,1,1-Tnchloroethane 20 ” <br /> Carbon tetrachlonde ND <br /> ND 20 , <br /> 1,1-Dichloropropene 2 0 <br /> ND <br /> Benzene 2 0 , <br /> ND <br /> 1,2-Drchloroethane 2 0 „ <br /> ND <br /> Tnchloroethene 2 0 <br /> ND <br /> 1,2-Dichloropropane 2 0 „ <br /> ND <br /> Dibromomethane 2 0 <br /> ND <br /> Bromodichloromethane 20 <br /> 2,2,5,5-Teuamethyltetrahydrofuran ND <br /> ND 20 <br /> cis-1,3-Dichloropropme 20 „ <br /> ND <br /> Toluene S o ” <br /> ND <br /> trans-l,3-Mchloropropene 2 0 <br /> ND <br /> 1,1,2-Tnchloroethane 2 0 " <br /> ND <br /> Tetrachloroethene 2 0 „ <br /> ND <br /> 1,3-Dichioropropane 2 0 „ <br /> ND <br /> Dibromochloromethane 2 0 „ <br /> ND <br /> l,2-Dibromoethane N20 <br /> „ <br /> ND <br /> Chlorobenzene <br /> The results rn this report apply to the samples analyzed rn accordance with the chmn of <br /> Sequoia Analytical-Walnut Creek custody docrrmern Tins analytical report must be reproduced in its entirety <br /> Page 17 of 27 <br />