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Sequoia 680 Chesapeake Drive Redwood City,CA^4063 (650)364-9600 FAX(650)364-9233 <br /> 4D 404 N.Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(9Z5)988-9673 <br /> 819 Striker Avenue,Sulte 8 Sacramento,CA 95834 (916)921.9600 FAX(916)921-0 100 <br /> 455 McDowell Blvd. North,Ste. D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Analytical 11551 Industrial Road San Carlos,CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> SECOR International Project: ARCO 4493,Stockton,CA Sampled: 2/10/99 to 2/12/99 <br /> 9912 Business Park Drive,Ste, 100 Project Number: NIA Received: 3/4/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 3/10/99 <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 7Notes* <br /> NW-3 0420(COtIfinued.) 5903078-08 S!12U <br /> 1,1,1,2-Tetrachloroethane 9020258 2/22/99 2/22/99 100 ND ug/kg <br /> 1,1,2,2-Tetrachloroethane 100 ND " <br /> Tetrachloroethene 100 ND " <br /> Toluene 100 ND " <br /> 1,2,3-Trichlorobenzene 100 ND " <br /> 1,2,4-Trichlorobenzene 100 ND " <br /> 1,1,1-Trichloroethane 100 ND <br /> 1,1,2-Trichloroethane 100 ND " <br /> Trichloroethene 100 ND " <br /> Trichlorofluoromethane 500 ND " <br /> 1,2,3-Trichloropropane 100 ND " <br /> 1,2,4-Trimethylbenzene 100 ND " <br /> 1,3,5-Trimethylbenzene 100 ND " <br /> � <br /> l chloride " 500 ND <br /> Xylenes 100 ND <br /> urrogate: Dibromofluoromethane 70.0-130 88.0 <br /> Surrogate: 1,2-DCA-d4 70.0-130 93.2 " <br /> Surrogate: Toluene-d8 70.0-130 88.4 " <br /> Surrogate. 4-BFB 70.0-130 83.2 " <br /> MTUoia Analytical -Sacramento *Refer to end of report for text of notes and definitions. <br /> Sandra R. Hanson,Client Services Representative Page 17 of 29 <br />