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Sequoia 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX(916)921-0100 <br /> EMCON-Sac Project: ARCO 2186,Stockton,CA Sampled: 6/17/99 <br /> 1433 N.Market Blvd. Project Number: N/A Received: 6/17/99 <br /> Sacramento,CA 95834 Project Manager: Dave Foley Reported: 6/21/99 <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 /> 1-3-N(17'1 5906308-01 S(W <br /> Tert-butyl alcohol 9060271 6/18%99 6/17/99 20.0 ND mg/kg D <br /> Methyl tert-butyl ether 0.200 21.2 D <br /> Di-isopropyl ether 0.200 ND D <br /> Ethyl tert-butyl ether 0.200 ND D <br /> Tert-amyl methyl ether 0.200 0.418 D <br /> Surrogate: 1,2-DCA-d4 60.0-140 84.8 % D <br /> 1-2-N(17'1 S906308-02 mil <br /> Tert-butyl alcohol 9060271 6/18/99 6/17/99 40.0 ND mg/kg D <br /> Methyl tert-butyl ether 0.400 35.7 D <br /> Di-isopropyl ether 0.400 ND D <br /> Ethyl tert-butyl ether 0.400 ND D <br /> Tert-amyl methyl ether 0.400 ND D <br /> Surrogate: 1,2-DCA44 60.0-140 83.2 % D <br /> T-3-S(17'1 S906308-03 Soil <br /> Tert-butyl alcohol 9060271 6/18/99 6/17/99 10.0 ND mg/kg <br /> Methyl tert-butyl ether 0.100 7.39 " <br /> Di-isopropyl ether 0.100 ND " <br /> Ethyl tert-butyl ether 0.100 ND " <br /> Tert-amyl methyl ether 0.100 ND " <br /> Surrogate: 1,2-DCA-d4 60.0-140 81.2 % <br /> T-2-S-(17') S906308-04 SA <br /> Tert-butyl alcohol 9060271 6/18/99 6/17/99 10.0 ND mg/kg <br /> Methyl tert-butyl ether 0.100 9.20 " <br /> Di-isopropyl ether 0.100 ND " <br /> Ethyl tert-butyl ether 0.100 ND " <br /> Tert-amyl methyl ether 0.100 ND " <br /> Surrogate: 1,2-DCA-d4 60.0-140 84.0 % <br /> T-1-N(17'1 S906308-05 SAW <br /> Tert-butyl alcohol 9060271 6/18/99 6/17/99 200 ND mg/kg D <br /> Methyl tert-butyl ether 2.00 272 D <br /> Di-isopropyl ether 2.00 ND D <br /> Ethyl tert-butyl ether 2.00 ND D <br /> Tert-amyl methyl ether 2.00 2.36 D <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Page 2 of 5 <br /> r�� <br />