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• 680 Chesapeake Drive Redwood City,CA 94063 ((550}364-9600 FAX(650)364-9233 <br /> Sequoia 404 N. Wiget Lane Walnut Creek,CA 94598 (9251986-9600 FAX(925)988.9673 <br /> 8(9 Striker[Avenue,Suite 8 Sacramento, CA 95834 1916)921-9600 FAX(916)921-0 f 00 <br /> Analytical 1455 McDowell Blvd.North,Ste. D Petaluma,CA 94954 V07)792-1865 FAX(707) 792.0342 <br /> 1551 Industrial Road San Carlos,CA 94070.4 f 1 1 (650)232-9600 FAX(650) 232.9612 <br /> EMCON -Sac Project: ARCD 2186, Stockton,CA Sampled: 3/31/99 <br /> 1433 N. Market Blvd. Project Number: 21775-237-004 Received: 4/1199 <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-1(36) S904028-01 Water <br /> Tert-butyl alcohol 9040103 4/8/99 4/8/99 200 ND ugil <br /> Methyl tert-butyl ether " 2.00 3.92 " <br /> Di-isopropyl ether 2.00 ND " <br /> Ethyl tert-butyl ether 412.00 ND " <br /> Test-amyl methyl ether 2.00 ND " <br /> Surrogate: 1,2-DCA44 . 60.0-140 121 <br /> MW-2(36?(36? 5904028-[)2 Water <br /> Tert-butyl alcohol 9040103 4/8199 418/99 200 ND ugfl <br /> Methyl Cert-butyl ether 2.00 ND " <br /> Di-isopropyl ether 2.00 ND " <br /> Ethyl rt-butyl ether 2.00 ND <br /> Tel* <br /> `el methyl ether 2.00 ND " <br /> Surrogate: 1,2-DCA-d4 60.0-140 114 % <br /> VRW-3 li5]l35) 5904028-03 )Yate <br /> Pert-butyl alcohol 9040103 4/8/99 4/8/99 200 ND ug/1 <br /> 4ethyl tert-butyl ether 2.00 ND " <br /> 7i-isopropyl ether 2.00 ND " <br />'thyl tert-butyl ether 2.00 ND " <br />-ert-amyl methyl ether 2.00 ND <br /> urrogate: 1,2-DCA-d4 60.0-140 116 YO <br /> Imo'-4(35) SUA028-04 Water <br /> ert-butyl alcohol 9040103 4/8199 4/8/99 200 ND ug/l <br /> [ethyl tert-butyl ether 2.00 7.86 " <br /> i-isopropyl ether 2.00 ND " <br /> hyl tert-butyl ether 2.00 ND <br /> !rt-aroyl methyl ether 2.00 ND " <br /> rrogate: 1,2-DCA-d4 60.0-140 105 <br /> V-3(36) 5904028--05 W a ter <br /> rt-butyl alcohol 9040103 4/8/99 418/99 200 ND ug/l <br /> thyl tent-butyl ether 2-00 ND " <br /> isopropyl ether 2,00 ND " <br /> yl terms-butyl ether 2.00 ND " <br /> uoia Analytical-Sacramento *Refer to end of report for text of notes and definitions, <br /> t <br /> atd W. Bobel,Client Services Representative Page 4 of 8 <br /> .sem <br />