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, <br /> 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)9a8-9600 FAX(92S)988 9673 <br /> D_ Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Gettler RyanyGeostrategies - ~ _ Client Proj ID Unocal SS#0123 _ Sampled 09/28/98~ . <br /> 6747 Sierra Court Suite J Sample Descnpt U-1 Received 09/28/98 = <br /> Dublin, CA 94568 Matrix LIQUID » <br /> Analysis Method EPA 8010 Analyzed 10/07/98 <br /> Attention Deanna Harding » ~Lab Number«98091-150-02 _ = Reported 11110j98 <br /> QC Batch Number GC1006980VOA32A <br /> Instrument ID GCHP32 <br /> Halogenated Volatile Organics (EPA 8010) <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> Bromodichloromethane 050 N D <br /> Bromoform 050 N D <br /> Bromomethane 1 0 N D <br /> Carbon Tetrachloride 050 N D <br /> Chlorobenzene 050 N D <br /> Chloroethane 10 N D <br /> Chloroform 050 N D <br /> Chloromethane 10 N D <br /> Dibromochloromethane 050 N D <br /> 1,2-Dichlorobenzene 050 N D <br /> 11,3-Dichlorobenzene 050 N D <br /> 1,4-Dichlorobenzene 050 N D <br /> Dichloroethane 050 N D <br /> Dlchloroethane 050 N D <br /> Dichloroethene 050 ND <br /> cls-1,2-Dichloroethene 050 22 <br /> trans-1,2-Dlchloroethene 050 ND <br /> 1,2-Dichloro propane 050 ND <br /> cls-1,3-Dlchloropropene 050 ND <br /> trans-1,3-Dlchloropropene 050 ND <br /> Methylene chloride 50 N D <br /> 1,1,2,2-Tetrachloroethane 050 N D <br /> Tetra chloroethene 050 10 <br /> 1,1,1-Trichloroethane 050 N D <br /> 1,1,2-Trichloroethane 050 N D <br /> Trichloroethene 050 33 <br /> Trichlorofluoromethane 050 N D <br /> Vinyl chloride 1 0 N D <br /> Surrogates Control Limits % % Recovery <br /> 4-Bromofluorobenzene 70 130 9 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 41210 <br /> Granicher <br /> Project Manager Page 3 <br />