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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM Concord, California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> aprealian Engineering, Inc Client Project ID Unocal#5098,5606 Pacific Ave, Stockton Sampled Mar 25, 1993 <br /> 401 Stanwell Or , Ste 400 Sample Descript Water, MW 12 Received Mar 26, 1993 <br /> Concord, CA 94520 Analysis Method EPA 5030/8010 Analyzed Apr 2, 1993 <br /> Attention Mardo Kaprealian, P E Lab Number 303-1172 Reported Apr 7, 1993 <br /> HALOGENATED VOLATILE ORGANICS (EPA 8010) <br /> Analyte Detection Limit Sample Results <br /> N9/L N9/L <br /> Bromodichloromethane 50 N D <br /> Bromoform 50 N D <br /> Bromomethane 100 N D <br /> Carbon tetrachloride 50 N D <br /> Chlorobenzene 50 N D <br /> Chloroethane 100 N D <br /> 2-Chloroethylvinyl ether 100 N D <br /> Chloroform 50 N D <br /> Chloromethane 100 N D <br /> Dibromochloromethane 50 N D <br /> 1,3-Dichloroben7-ene 50 N D <br /> 1 4-Dichlorobenzene 50 N D <br /> 1,2-Dichlorobenzene 50 N D <br /> 1 1-Dichloroethane 50 N D <br /> 0 1 <br /> 2-Dichloroethane 50 N D <br /> 1-Dichloroethene 50 N D <br /> cls-1,2-Dichloroethene 50 N D <br /> trans-1,2-Dichloroethene 50 N D <br /> 1,2-Dichloropropane 50 N D <br /> cis-1 3-Dichloropropene 50 N D <br /> trans-1 3-Dichloropropene 50 N D <br /> Methylene chloride 500 N D <br /> 1 1,2,2-Tetrachloroethane 50 N D <br /> Tetrachloroethene 50 N D <br /> 1,1,1-Trichloroethane 50 N D <br /> 1,1 2-Trichloroethane 50 N D <br /> Trichloroethene 50 N D <br /> Trichlorofluoromethane 50 N D <br /> Vinyl chloride 100 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 /> orEQU IA ANALYTICAL <br /> Cott A Chieffo <br /> Project Manager 3031170 KE) <4> <br />