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` SEQUOIA ANALYTICAL <br /> 1900 Sates Avenue • Suite LM • Concord, California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> Nx_ <br /> preahan Engineering, Inc n Client Project ID + Unocal acrfic Ave, Stockton Sampled`- Sep 30,--19-92 <br /> 2401 Stanwell Drive, Suite 400 Sample Descrlpt Water, W 11 Received Sep 30, 1992 <br /> Concord, CA 94520 Analysis Method EPA 5030 8010 Analyzed 10/2 & 10/8/92 <br /> Attention Mardo Kapreallan, P E Lab Number 210-0028 Reported Oct 12, 1992 <br /> HALOGENATED VOLATILE ORGANICS (EPA 8010) <br /> Analyte Detection Limit Sample Results <br /> N9/L. N9/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-Chloroethylvinyl 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-Dichloroethane 10 N D <br /> W,2—D a.a.a.a .axawaxa.a.ax......a.axaa! iso <br /> 1,1- lchloroethene 10 <br /> cis-1,2-D ichlo roethene 10 N D <br /> trans-l,2-Dichloroethene 10 N D <br /> 1,2-Dichloropropane 10 N D <br /> cls-1,3-Dichloropropene 10 N D <br /> trans-1,3-Dichloropropene 10 N D <br /> Methyiene chloride 100 N D <br /> 1,1,2,2-Tetrachloroethane 10 N D <br /> Tetrachloroethene 10 N D <br /> 1,1,1-Trichloroethane 10 N D <br /> 1,1,2-Trichloroethane 10 N D <br /> Trichloroethene 10 N D <br /> Tnchlorofluoromethane 10 N D <br /> Vinyl chlonde 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 /> EDUOIA ANALYTICAL <br /> i <br /> Scott A hleffo <br />` < Protect Manager 2100027 KEl <3> <br /> r <br />