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D1319 Sequoia Striker Avenue, Suite 8 <br /> 4Sacramento,CA 95834 <br /> (91 6)921-9600 <br /> Analytical <br /> FAX(916)921-0900 <br /> EMCON/IT-Sacramento Project. ARCO 2186, Stockton,CA Sampled: 12/3199 <br /> 1433 N.Market Blvd.,#1 Project Number: 792232 Received: 1216/99 <br /> Sacramento,CA 95834 Project Manager: Dave Foley Reported: 12/20/99 <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 (74'} 5912063-01 Water <br /> Tert-butyl alcohol 9120196 12/16/99 12/16/99 400 ND ug/l D <br /> Methyl.tert-butyl ether 4.00 984 D <br /> Di-isopropyl ether 4.00 ND D <br /> Ethyl tert-butyl ether 4.00 ND It <br /> D <br /> Tert-amyl methyl ether 4.00 8.92 " _ D <br /> Surrogate: 1,2-DCA-d4 60.x-140 118 <br /> MW-2(74') 5912063-02 Water <br /> Tert-butyl alcohol 9120196 12/15/99 12/15/99 200 ND ug/l <br /> Methyl tert-butyl ether " 1. 112,00 6.66 " <br /> Di-isopropyl ether 2.00 ND <br /> Ethyl tert-butyl ether 2.00 ND <br /> Tert-amyl methyl ether 2.00 ND_ <br /> Surr ate: 1,2-DCA-d4 -�T 60.0-140 96.4 <br /> M (73') S912063-03 Water <br /> Tert-butyl alcohol 9120196 12/15/99 12/15/99 200 ND ug/l <br /> Methyl tert-butyl ether 2.00 2.64 " <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: 1,2-DCA-d4 60.0-140 97.2 <br /> MW-4(64') 5912063-04 Water <br /> Tert-butyl alcohol 9120211 12/17/99 12/17/99 400 ND ug/l D <br /> Methyl tert-butyl ether 4.00 760 D <br /> Di-isopropyl ether 4.00 ND D <br /> Ethyl tert-butyl ether 4.00 ND " D <br /> Tert-amyl methyl ether 4.00 6.56 _ D <br /> Surrogate: 1,2-DCA-d4 " " 60.0-140 112 % <br /> VW-3 (60') 5912063-05 Water <br /> Ten-butyl alcohol 9120211 12/16/99 12/16/99 200 ND ug/l <br /> Methyl tert-butyl ether 2.00 262 " <br /> Di-isopropyl ether 2.00 ND " <br /> Ethyl tert-butyl ether 2.00 ND " <br /> Tert-amyl methyl ether 2,00 2.08 <br /> Surrogate: 1,2-DCA-d4 " " " 60.0-140 106 % <br /> SeMW Analytical- Sacramento *Refer to end of report for text of notes and definitions, <br /> Page 4 of 9 <br />