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Sequoia 819 Striker Avenue.Suite 8 <br /> Sacramento, CA 95834 <br /> i!D (916) 921-9600 <br /> Analytical FAX(916) 921-0 100 <br /> • J <br /> EMCON-Sac Project: ARCO 2186, Stockton,CA Sampled: 6111199 <br /> 1433 N. Market Blvd. Project Number: 21775-237-002 Received: 6/11/99 <br /> Sacramento,CA 95834 Project Manager: Dave Foley Reported: 6/28/99 <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 /> (7"W-1 5906224-01 Water <br /> Teri-butyl alcohol 9060247 6117199 6/17199 200 ND ug/l <br /> 114ethyl tert-butyl ether 2.00 6.28 " <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 " " 60.0-140 108 % <br /> (74) MW-2 5906224-02 Water <br /> Tert-butyl alcohol 9060247 6/17199 6/17/99 200 ND ugA <br /> Methyl tert-butyl ether 2.00 2.22 " <br /> Di-isopropyl ether 2.00 ND " <br /> Ethyl tent-butyl ether 2.00 ND " <br /> T myl methyl ether 2.00 ND " <br /> Surrogate: 1,2-DCA-d4 60.0-140 104 % <br /> (73),M -3-3 5906224-03 Watex <br /> Tert-butyl alcohol 9060247 6/17/99 6/17/99 200 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: 1,2-DCA-d4 11 <br /> " 60.0-140 103 % <br /> (64) H A 5406224-04 Water <br />`Pert-butyl alcohol 9060247 6/17199 6/17/99 200 ND ug/l <br /> Methyl tert-butyl ether 2.00 34.6 " <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 60.0-140 101 910 <br />(60)VW-3 5906224-05 Water <br /> Tert-butyl alcohol 9060247 6/17199 6/17/99 200 ND ug/I <br /> Methyl tert-butyl ether 2.00 5.48 " <br /> Di-isopropyl ether 2.00 ND " <br /> Ethyl tent-butyl ether 2.00 ND " <br /> Te yl methyl ether 2.00 ND " <br /> Seq oia Analytical -Sacramento *Refer to end of report for text of notes and definitions. j <br /> Page 4 of 8 <br />