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U1 y <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364 %00 FAX(650) 364 9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (925)988 9600 FAX(925)988 9673 <br /> Analytical $19 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792 1865 FAX(707) 792-0342 <br /> EMCON- Sac Project ARCO 2130, Stockton CA <br /> 1433 N Market BI%dSampkA 12/2i9S <br /> Project Number 21775-229 003 <br /> Sacr.tmenlo CA 9DS34 Project Man Iger Dave Foley Received 1213198 <br /> Reported 12/17/98 <br /> Volatile Organte Compounds by EPA Method 8260A <br /> Sequoia Analytical- Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits <br /> Limit Result Units Notes* <br /> F <br /> MAK-1-G-3-11 <br /> 881?046;01 Watet <br /> Teir-butyl alcohol 8120207 12/3/98 12/3/98 200 ND ugll <br /> Methyl tt.ii-butyl ether <br /> Di-isopropyl ether 200 ND <br /> Ethyl tent butyl ethei „ 200 ND <br /> Tert-amyl methyl ether 200 ND " <br /> Surrogate I Z-DC t-d4 200 ND <br /> 600-140 110 % <br /> 11)_(7 '1 S$12046-0_ <br /> 7 Wester <br /> Tert-butyl alcohol 8120207 1213198 1213/98 200 ND ug/I <br /> Methyl tert-butyl ether 2 00 6 U4 <br /> Di-isopropyl ether „ <br /> Ethyl tert-butyl ether 200 ND " <br /> T yl methyl ether 2 00 ND " <br /> " <br /> Sr 2 00 ND ate 1 ?-DCA d4 600 140 101 <br /> A4W-l( 3') S812046-03 wate <br /> Tert-butyl alcohol 8120207 12/3198 12/3/98 200 ND ug/l <br /> Methyl tert-butyl ether 2 00 ND " <br /> Di-isopropyl ether 2 00 ND <br /> Ethyl tert-butyl ether " " " 2 00 ND <br /> Tert-amyl methyl ether " " 2 00 ND <br /> -Surrogate 12 DCA d4 60 0-140 <br /> !10 <br /> MWA(73,1 <br /> $81204G-04 Water <br /> Tert-butyl alcohol 8120207 12/3/98 12/3/98 200 ND ug/i <br /> Methyl tert-butyl ether " " " 2 00 3 80 <br /> Di-isopropyl ether " 2 00 ND " <br /> Ethyl tort-butyl ether 2 00 ND <br /> Ter(-amyl methyl ether 2 00 ND <br /> Surrogate 1 2-DCA-d4 60 0-140 <br /> Ili <br /> AI W-5 5' <br /> S812046-05 Water <br /> Tert-butyl alcohol 8120207 12/3/98 12/3/98 <br /> Methvl tert-butyl ether " 00 D uND g/l <br /> Di-isopropyl ether 2 00 ND <br /> 568 <br /> Ethyl tert-butyl ether 200 ND " <br /> Seq nalytical- -Sacramento _ <br /> *Refer to en(1 of r cpoc!for teAl of notea cold elefurdrons <br /> r <br />'onald W Bobel Client Services Representative <br /> Page 4 of 11) <br />