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Sequoia 680 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)79Z-0342 <br /> e <br /> SF-COR International Project: ARCO 4493,Stockton,CA Sampled: 2116199 <br /> 9912 Business Park Drive, Ste. 100 Project Number- NIA Received: 2117199 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 3/3/99 <br /> Volatile Organic Compounds by EPA Method 8260A <br /> Sequoia AnaIyticaI-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> MW-4(continued) 5902252-04 Watt[ <br /> 1,1,1,2-Tetrachloroethane 9020304 2126199 2126199 20.0 ND ug/l D <br /> 1,1,2,2-Tetrachloroethane 20.0 ND D <br /> Tetrachloroethene 20.0 ND D <br /> Toluene 20.0 ND D <br /> 1,2,3-Trichlorobenzene 20.0 ND D <br /> 1,2,4-Trichlorobenzene 20.0 ND D <br /> 1,1,1-Trichloroethane 20,0 ND D <br /> 1,1,2-Trichloroethane 20.0 ND D <br /> Trichloroethene 20.0 ND D <br /> Trichlorofluoromethane 50.0 ND D <br /> 1,2,3-Trich lo ro propane 20.0 ND D <br /> 1,2,4-Trimethylbenzene 20.0 1550 D <br /> 1,3,5-Trimethylbenzene 20.0 348 D <br /> yl chloride 20.0 ND D <br /> 1 Xylenes 20.0 1500 D <br /> urrogate: Dibromofluoromelhane 70.0-130 118 <br /> Surrogate: 1,2-DCA-d4 70.0-130 117 " <br /> Surrogate: Toluene-d8 70.0-130 100 " <br /> Surrogate: 4-BFB 70.0-1.30 101 " <br /> 4b <br /> ,T'quoia Analytical -Sacramento *Refer to end of report for text of notes and definitions. <br /> Sandra R. Hanson,Client Services Representative Page 10 of 20 <br />