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w <br /> r130 Chesapeake Drive Redwood City,C4 )63 (650)364-9600 FAX(650)3f}4-9233 F <br /> Sequoia 404 N.Wiget Lane Walnut Creek,k X598 (925)988-9600 FAX(925)988-9673"<r. <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0io0 <br /> 455 McDowell Blvd. North,Ste. D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Analytical '551 Industrial Road San Carlos.CA 94070-41 1 1 (650)232-9600 FAX(650)232-9617 <br /> Cambria Environmental Project: EQUILON, 1313 E. Charter Way,Stockton,CA Sampled: 4/29199 <br /> 270 Perkins Street Project Number: N/A Received: 4/29/99 <br /> Sonoma,CA 95476 Project Manager: Aubrey Cool Reported: 5/4,7199 1 <br /> i <br /> Volatile Oxygenate Compounds b3 EPA Method 8260A <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Li its Limit Result Units Notes* <br /> i <br /> 'IS-A 14' 5904402-01 I <br /> Tert-butyl alcohol 9050049 5/4/99 516/99 10.0 ND mg/kg <br /> Methyl tent-butyl ether 0.100 ND " <br /> Di-isopropyl ether 0.100 ND " <br /> Ethyl tert-butyl ether 0.100 ND i <br /> Tert-amyl methyl ether 0.100 ND " <br /> Surrogate; 1,3-DC,4-d4 <br /> 60.0-140 101 <br /> TS-B-]4' 5904402-0241 I <br /> Tert-butyl alcohol 9050049 5/4/99 5/6/99 10.0 ND mg/kg <br /> Methyl ter-butyl ether " <br /> 0.100 ND <br /> Di-isopropyl ether 0.100 ND <br /> Ethyl tent-butyl ether 0.100 ND " <br /> Tert-amyl methyl ether 0.200 ND " <br /> Surrogate: 1,2-DCA-d4 60.6-140 96.4 <br /> I <br /> TS-C-141 5904402-03 541.1 <br /> Tert-but I alcohol <br /> Y 9050049 5/4/99 5/6/99 10.0 ND mg/kg <br /> Methyl tort-butyl ether I <br /> 0.100 ND <br /> Di-isopropyl ether 0.100 ND " <br /> Ethyl tent-butyl ether 0.100 ND " <br /> -Pert-amyl methyl ether 0.100 ND " <br /> Surrogate: 1,1-DCA-d4 " 60.0140 96,8 % <br /> TS-D=LS9-04402-04 <br /> Tert-butyl alcohol 9050049 5/4/99 5/6/99 10.6 ND mg/kg <br /> SAW <br /> Methyl tert-butyl ether 0.200 NO " <br /> Di-isopropyl ether 0.100 ND <br /> Ethyl tert-butyl ether 0.100 ND " <br /> Ter-amyl methyl ether 0.100 ND " <br /> Surrogate: 1,1-DCA-d4 60.0-140 104 <br /> TS-F-1 51 S904492-05 rO• <br /> Tert-butyl alcohol 9050049 5/4/99 5/6/99 10.0 ND mg/kg <br /> Methyl tert-butyl ether 0.100 ND " <br /> Di-isopropyl ether 0.100 ND " <br /> Ethyl tert-butyl ether 0.100 ND " <br /> Tert-amyl methyl ether 0.100 ND " <br /> Sequoia Analytical-Sacramento *refer to end of report for text of notes and definitions. <br /> Sandra R.Hanson,Client Services Representative Page 7 of 15 <br />