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h <br /> p 1 ra 819 Striker Avenue,Suite 8 <br /> T <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX(9 i 6)921-0100 <br /> r <br /> EMCON-Sac Project: ARCO 2186,Stockton,CA Sampled: 6/17/99 <br /> 1433 N. Market Blvd. Project Number: NIA Received: 6/17/99 <br /> Sacramento,CA 95834 Project Manager: Dave Foley Reported: 6/21199 <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 /> T-3-N(17-3 S906308-01 i SQiI <br /> Tert-butyl alcohol 9060271 6118%99 6/17199 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-DCA44 60.0.140 84.8 % D <br /> T--2--DUIT) 5906308-02 snit <br /> Tert-butyl alcohol 9060271 6/18/99 6/17199 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-DCA-d4 60.0-140 83.2 % D <br /> 1-3-5(L7') - S906308-03 SQii <br /> Tert-butyl alcohol 9060271 6/18199 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-2T -Sf17'1f17'1 5906308-04 <br /> Tert-butyl alcohol 9060271 6118/99 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 /> 1-1-N(IT) $90630R-05 S(W <br /> Tert-butyl alcohol 9060271 6/18/99 6117199 200 ND mg/kg D <br /> Methyl tort-butyl ether 2.00 272 D <br /> Di-isopropyl ether 2.00 ND D <br /> Ethyl tert-butyl ether 2.00 ND - D <br /> Tent-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�h . <br />