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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> (D 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> AwAnalytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> 4kP0S Services Client Project lid Unocal#0123, 1034 Central Ave,Tracy Sampled Sep 3, 1997 <br /> 2401 Stanwell Dr, Ste 300 Sample Descnpt Water, U-1 Received Sep 3, 1997 <br /> Concord, CA 94520 Analysis Method EPA 5030/8010 Analyzed Sep 15 - 16, 97 <br /> Attention Jarrel Crider Lab Number 709-0187 Reported Sep 25, 1997 <br /> HALOGENATED VOLATILE ORGANICS (EPA 8010) <br /> Analyte Detection Limit Sample Results <br /> Ng/L Ng/L <br /> Bromodichloromethane 050 N D <br /> Bromoform 050 N D <br /> Bromomethane 10 N D <br /> Carbon tetrachloride 050 N D <br /> Chlorobenzene 050 N D <br /> Chloroethane 10 N D <br /> 2-Chloroethylvinyl ether 10 N D <br /> oro orm 050 077 <br /> oromet ane 10 <br /> Dibromochloromethane 050 N D <br /> 1,3-Dichlorobenzene 050 N D <br /> 1,4-Dichlorobenzene 050 N D <br /> 1,2-Dichlorobenzene 050 N D <br /> 1,1-Dichloroethane 050 N D <br /> 2-Dichloroethane 050 N D <br /> 1-Dichloroethene 050 N D <br /> Tcls-1,2-Dichloroethene 050 91 <br /> trans-1,2- is oroet ene 050 1 3 <br /> 1,2-D IC hloropropane 050 <br /> cis-1,3-Dichloropropene 050 N D <br /> trans-l,3-Dlchloropropene 050 N D <br /> Methylene chloride 50 N D <br /> 1,1,2,2-Tetrachloroethane 050 N D <br /> Tetrachloroethene 50 is <br /> 1,1,1-I richloroethane 050 <br /> 1,1,2-Trichloroethane 050 N D <br /> Trichloroethene 050 10 <br /> r!Chlorotluoromethane 050 <br /> Vinyl chloride 1 0 N D <br /> Surrogates Control Limit% % Recovery <br /> Dibromodifluoromethane 50 150 118 <br /> 4-Bromofluorobenzene 50 150 96 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL, #1271 <br /> 03natureon File <br /> Alan B Kemp <br /> Project Manager <br /> 7090187 MPD <5> <br />