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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> (510) 686-9600 - FAX (510) 686-9689 <br /> 10aprealian Engineering, Inc Client Project ID Unocal' 6 Pacific Ave , Stochtan Sampled x 'Sep 30, 1992 <br /> 2401 Stanwell Drive, Suite 400 Sample Descript Water, W 12 Received Sep 30, 1992 <br /> Concord, CA 94520 Analysis Method EPA 5030/8010 Analyzed 10/2& 10/8/92 <br /> Attention Mardo Kaprealian, P E Lab Number 210-0029 Reported Oct 12, 1992 <br /> HALOGENATED VOLATILE ORGANICS (EPA 8010) <br /> Analyte Detection Limit Sample Results <br /> Ng/L lig/L <br /> Bromodichloromethane 10 N D <br /> Bromoform 10 N D <br /> Bromomethane 20 N D <br /> Carbon tetrachloride 10 N D <br /> Chlorobenzene 10 N D <br /> Chloroethane 20 N D <br /> 2-Chloroethyivinyl ether 20 N D <br /> Chloroform 10 N D <br /> Chloromethane 20 N D <br /> Dibromochloromethane 10 N D <br /> 1,3-Dichlorobenzene 10 N D <br /> 1,4-Dichlorobenzene 10 N D <br /> 1,2-Dichlorobenzene 10 N D <br /> 1,1-Dichlorryyoethane 10 �N].�D <br /> 1JS.7W ie L`NJMM N1a.MH4H• a��iMHJiJiI.1i M.M.H.4f.14r+� 1I0 1�I-fad-�aaa--aa� LM <br /> 1,1- is oroet ene 10 <br /> cis-1,2-D ichloroethene 10 N D <br /> trans-l,2-Dichloroethene 10 N D <br /> 1,2-Dichloropropane 10 N D <br /> cis-1,3-Dichloropropene 10 N D <br /> trans-1,3-Dichloropropene 10 N D <br /> Methylene chloride 100 N D <br /> 1,1,2,2-Tetrachloroethane 10 N D <br /> Tetrachloroethene 10 N D <br /> 1,1,1-Tnchloroethane 10 N D <br /> 1,1,2-Trichloroethane 10 N D <br /> Trichloroethene 10 N D <br /> Trichlorofluoromethane 10 N D <br /> Vinyl chloride 20 N D <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,detection limits for this sample have been raised <br /> OEQUOIA ANALYTICAL <br /> Scott A Chieffo <br /> Project Manager 2100027 KEI <4> <br />