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Sequoia 68o Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N. Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <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 94070-41 11 (650)232-9600 FAX(650)232-9612 <br /> Pinnacle-C.P. Project: ARCO,5469, Stockton CA Sampled: 2/11/99 <br /> 3939 Cambridge Road,Ste.220 Project Number: N/A Received: 2/12/99 <br /> Cameron Park,CA 95682 Project Manager: Mark Capps Reported: 3/1/99 <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 * <br /> FNotes <br /> FL-14(4.5')(continued) S202174-14 5411 <br /> Surrogate: 1,1-DCA-d4 9010106 2117199 2117199 60.0-140 108 % <br /> PL-15(4.5') S202174-15 SAW <br /> Tert-butyl alcohol 9020206 2/17/99 2/17/99 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: 1,1-DCA-d4 60.0-14094.8 % <br /> PL-16( .5') S902174-16 <br /> Sail <br /> Tert-butyl alcohol 9020206 2/17/99 2/17/99 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: 1,1-DCA-d4 60.0-140 94.8 % <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Ronald W. Bobel,Client Services Representative Page 10 of 15 <br />