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404 N Wiget Lane <br /> 94598 <br /> 4 <br /> Sequoia Walnut (Creek,CA - <br /> www s(975)equola%8-%73 <br /> %7tn <br /> Analytical <br /> (11. 00 R%an Int. - Dublin Project Tosco <br /> h747 tiicrra C ourt Suitt. I Project Number Tosco 4 11192 Reported <br /> Ihihlin( /\ 945h8 Project Manager Doug Lee 19-Oct-01 10 48 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> IALI,11',IL Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1J 16010- EPA 5030E (P/T) <br /> Blank (1316010-BLK1) _ Prepared&Analyzed 16-Oct-01 <br /> Ethanol ND _ S00 ug/l <br /> tent Butyl alcohol ND 20 " <br /> Methyl tert-butyl ether(MTBE) ND 20 " <br /> Di-isopropyl ether <br /> ND 20 " <br /> Ethvl ten-butyl ether ND 20 " <br /> ten Amyl methyl ether <br /> ND 20 " <br /> 1,2-Dichloroethane ND 20 " <br /> 0 " <br /> Ethylene dtbromide ND 2 <br /> Surrogate Dibromo/luoromethane 50 7 SO 0 101 50-150 <br /> Surrogale 1 7 Drchloroethane-d4 347 500 694 50-150 <br /> nk(1316010-BLK2) Prepared&Analyzed 17_Oct-01 <br /> %nl ND 500 ug/l <br /> tLn-l3utrl alcohol ND 20 <br /> '%lith%I llrl Iuttl Lthu(M 1131 j ND 20 <br /> lh itiatjtrop%I klhgr NI) 20 <br /> 1 d%%I ikri-bun I tihtr ND 20 " <br /> tun Amt I int tht I Ther ND 20 <br /> 1 2 DiOloroethatlL ND 20 <br /> 1 tie%ILnt dibrumidL ND 20 <br /> Surrogate Uthromo/luoromethane 484 500 96 8 50-150 <br /> Surrogutc / 2-1)ichloroethane-d4 426 500 852 50-150 <br /> LCS(1316010-BSI) _ Prepared&Analyzed 16-Oct-01 <br /> Methyl tert-butyl ether(MTBE) 406 - - --_Y0 ug/l 50 0 8l 2 70-130 <br /> Surrogare Dibromojluoromethane 491 <br /> 300 982 50-150 <br /> Surrogate 1 2-Dichloroethone-d4 424 500 848 50-150 <br /> uoia A nalyticai - Walnut Creek The results in this report apply ro the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 7 of 10 <br />