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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (6SO)364-9600 FAX(650) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792 1865 FAX(707) 792 0342 <br /> i 551 Industrial Road San Carlos CA 94070 41 1 1 (650)232 9600 FAX(650)232 9612 <br /> EMCON-Sac Project ARCO 2130,Stockton, CA Sampled 3/3 i/99 <br /> 1433 N Market Blvd Project Number 21775-229 004 Received 4/1/99 <br /> Sacramento,CA 95834 Project Manager Dave Foley Reported 4/15/99 <br /> Volatile Oxygenate Compounds by EPA Method 8260A <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes" <br /> MW-5(75)75)(co)_nt�ni�P S.9DA029-05 �, te <br /> Ter(-amyl methyl ether 9040103 4/8/99 4/8/99 2 0 ND ugll <br /> Surrogate 1,2-DCA-d4 " 600-140 115 % <br /> Mff—A(7 2) 5904029-06 Water <br /> Tert-butyl alcohol 9040103 4!8199 418199 200 ND ug/l <br /> Methyl tert-butyl ether 200 2 20 " <br /> Di-isopropyl ether 200 ND <br /> Ethyl Cert-butyl ether 2 00 ND <br /> Tert-amyl methyl ether 200 ND " <br /> Surrogate 12 DCA-d4 600-140 109 <br /> Airpropyl <br /> -7(72) l 59040.29-07 Water <br /> Y 9040103 4/8/99 4/8199 200 ND ug/l <br /> tert-butyl ether " <br /> 200 ND <br /> ether 2 00 ND " <br /> Ethyl tert-butyl ether 2 40 ND " <br /> Tert-amyl methyl ether 2 00 ND " <br /> Surrogate 12-DCA d4 600-140 116 <br /> S204029-08 <br /> WatTert-but l alcohol 9040103 418199 4/$199 <br /> 240 ND ug/l <br /> Methyl tert-butyl ether 2 04 ND <br /> Di-isopropyl ether 2 00 ND <br /> Ethyl tert-butyl ether 2 00 ND <br /> Tert-amyl methyl ether 200 ND <br /> Surrogate 1 2-DCA d4 <br /> 600-140 <br /> 118 YO <br /> I <br /> Sequ a Analytical-Sacramento "Refer to end of report for text of notes and definitions <br /> r,onald W Bobei,Client Services Re resentative <br /> 1PZX Page 5 of 9 <br />