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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 4404 N.Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-%73 <br /> 819 Striker Avenue,Suite 8 Sacramento.CA 95834 {916)921-9600 FAX(916}921.0100 <br /> McDowell Blvd.North,Ste. D 4 <br /> Analytical 1555 Industrial RdSan Carlos,CA 94070-411 1 (6 0)232-9600 FAX(650)232-96 2 <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 13enkosky 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 Notes" <br /> MW-1 10,(eontinued) 5903078-01 SOB <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 /> l chloride 500 ND " <br /> I Xylenes 100 150 " <br /> Surrogate: DibromofTuoromethane 70.0-130 94.4 % <br /> Surrogate: 1,2-DCA-d4 70.0-130 96.0 <br /> Surrogate: Toluene-d8 70.0-130 93.2 <br /> Surrogate: 4-BFB 70.0-130 85.6 <br /> quoia Analytical - Sacramento '"Refer to end of report for text of notes and definitions, <br /> Sandra R. Hanson, Client Services Representative Page 3 of 29 <br />