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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX(415) 364-9233 <br /> 404N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Iwo Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> 401, <br /> Services Client Project ID Unocal#0123,1034 Central Ave,Tracy Sampled Sep 3, 1997 <br /> 2401 Stanwell Dr, Ste 300 Sample Descript Water, U-4 Received Sep 3, 1997 <br /> Concord, CA 94520 Analysis Method EPA 5030/8010 Analyzed Sep 15, 1997 <br /> Attention Jarrel Crider Lab Number 709-0190 Reported Sep 25, 1997 <br /> HALOGENATED VOLATILE ORGANICS (EPA 8010) <br /> Analyte Detection Limit Sample Results <br /> pg/L N9/L <br /> Bromodichloromethane 25 N D <br /> Bromoform 25 N D <br /> Bromomethane 50 N D <br /> Carbon tetrachloride 25 N D <br /> Chlorobenzene 25 N D <br /> Chloroethane 50 N D <br /> 2-Chloroethylvinyl ether 50 N D <br /> Chloroform 25 N D <br /> Chloromethane 50 N D <br /> Dibromochloromethane 25 N D <br /> 1,3-Dichlorobenzene 25 N D <br /> 1,4-Dichlorobenzene 25 N D <br /> 1,2-Dichlorobenzene 25 N D <br /> 1,1-Dlchloroethane 25 N D <br /> 1,2-Dichloroethane 25 N D <br /> 4k,1-Dichloroethene 25 N D <br /> s-1,2-Dichloroethene 25 N D <br /> trans-1,2-Dichloroethene 25 N D <br /> 1,2-Dichloropropane 25 N D <br /> cis-1,3-Dichloropropene 25 N D <br /> trans-1,3-Dichloropropene 25 N D <br /> Methylene chloride 25 N D <br /> 1,1,2,2-Tetrachloroethane 25 N D <br /> Tetracfiioroethene 25 47 <br /> -Trichloroethane 2 <br /> 1,1,2-Trichloroethane 25 N D <br /> Trichloroethene 25 N D <br /> Trichlorofluoromethane 25 N D <br /> Vinyl chloride 50 N D <br /> Surrogates Control Limit% %Recovery <br /> Dibromodifluoromethane 50 150 120 <br /> 4-Bromofluorobenzene 50 150 89 <br /> Analytes reported as N D were not present above the stated limit of detection Because matrix effects and/or other factors <br /> required additional sample dilution,deteotion limits for this sample have been raised <br /> SEQUOIA ANALYTICAL, #1271 <br /> nature on Fite <br /> Alan B Kemp <br /> Project Manager <br /> 7090187 MPD <8> <br />