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660 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> Sequoia 404 N.Wiget lane Wainut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0 100 <br /> Analytical 1455 McDowell Blvd. North,Ste. D Petaluma,CA 94954 (707)792-1865 FAX(707) 792-0342 <br /> 1551 Industrial Road San Carlos,CA 94070-4111 (650)232-9600 FAX(650) 232-9612 <br /> • <br /> SECOR International Project: ARCO 4493,Stockton,CA Sampled: 2/10/99 to 2/12199 <br /> 9912 Business Park Drive,Sic. 100 Project Number: N/A Received: 2/16/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 3/2/99 <br /> Volatile Organic 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 Q10 S902231-02 Soil <br /> Tert-butyl alcohol 9020258 2122/99 2/22/99 10.0 ND mg/kg <br /> Methyl tert-butyl ether 0.100 ND " <br /> Di-isopropyl ether 0.100 ND " <br /> Ethyl ten-butyl ether 0.100 ND " <br /> Tert-amyl methyl ether 0.100 ND " <br /> Surrogate: 1,2-DCA-d4 60.0-140 96.0 % <br /> MW-1 k25 5992231-05 Soil <br /> Teri-butyl alcohol 9020258 2122/99 2/22/99 10.0 ND mg/kg <br /> Methyl tert-butyl ether 0.100 ND " <br /> Di-isopropyl ether 0.100 ND " <br /> 0l tert-butyl ether 0.100 ND " <br /> amyl methyl ether 0.100 ND " <br /> Surrogate: 1,2-DCA-d4 60.0-140 90.0 % <br /> MW--J 030 S902231-06 Soil <br /> Tert-butyl alcohol 9020258 2/22/99 2/22/99 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 /> Surrogate: 1,2-DCA-d4 60.0-140 106 % <br /> MW-2 (Wl.Q S902231-08 S1W <br /> Tert-butyl alcohol 9020258 2122/99 2/22/99 10.0 ND mg/kg <br /> Methyl tert-butyl ether 0.100 ND " <br /> Di-isopropyl ether 0.100 ND " <br /> Ethyl tent-butyl ether 0.100 ND " <br /> Tert-amyl methyl ether 0.100 ND " <br /> Surrogate: 1,2-DCA-d4 " 60.0-140 951 % <br /> MW_2k2g 5902231-10 sod <br /> Tert-butyl alcohol 9020258 2/22/99 2/22199 10-0 ND mg/kg <br /> Methyl tert-butyl ether 0.100 ND " <br /> Di-isopropyl ether 0.100 ND " <br /> yl tert-butyl ether 0.100 ND " <br /> equoia Analytical -Sacramento *Refer to end of report for text of notes and definitions. <br /> 4adr, �Han,,�, Clieryt ,,vices Representative Page 6 of 15 <br />