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680 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 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 Indushial[toad San Carlos,CA 94070-4111 (650)232-9600 FAX(650)Z3Z-9612 <br /> i <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: 314/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 3110199 <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-4 k2Q(C9ntinued) S903M- 5-ail <br /> 1,1,1,2-Tetrachloroethane 9020258 2/22/99 2122199 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 /> yl chloride 500 ND " <br /> al Xylenes 100 ND " <br /> urrogate: Dibromofluoromethane 70.0-130 88.0 % <br /> Surrogate: 1,2-DCA-d4 70.0-130 91.6 <br /> Surrogate: Toluene-d8 70.0-130 84.8 <br /> Surrogate: 4-BFB 70.0-130 79.6 <br /> quoin Analytical -Sacramento Refer to end of report for 1[x1 of Holes and definitions. i <br /> Sandra R. Hanson,Client Services Representative Page 23 of 29 <br />