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680 Chesapeake <br /> City.CA <br /> (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N.Wiget Lane Redwood ureek,CA 4�3 (925)988-9600 FAX{925)988-9673 <br /> 819 Sulker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0 100 <br /> 455 865 FAX(707)792-0342 <br /> Analytical 1551 Indus tial Road North,Ste.0 San iCarlos.CA 94070-41 11 (650)232-uma,CA 94954 (707) 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: N/A 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 /> Anal to Number Prepared Analyzed Limits Limit Result Units Notes* <br /> MW-2 &20(continued) S903078-05 mil <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-Trimethyl benzene 100 ND " <br /> 1,3,5-Trimeth yl benzene 100 NDANNiv " <br /> yl chloride 500 ND " <br /> al Xylenes 100 ND <br /> urrogate: Dibromofluoromethane 70.0-130 90.8 <br /> Surrogate: 1,2-DCA-d4 70.0-130 92.8 " <br /> Surrogate: Toluene-d8 70.0-130 91.2 <br /> Surrogate: 4-BFB 70.0-130 85.6 <br /> equoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> I <br /> Sandra R. Hanson,Client Services Representative Page I 1 of 29 <br />