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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> Kaprealian Engineering, Inc. Client Project ID: Unocal/7303 Pacific Ave., Stockton Sampled: Dec 30, 1991 <br /> P.O. Box 996 Sample Descript: Water, MW1 Received: Dec 30, 1991 <br /> Benicia, CA 94510 Analysis Method: EPA 5030/8010 Analyzed: Jan 3, 1992 <br /> Attention: Mardo Kaprealian, P.E. Lab Number 112-1160 Reported: Jan 15, 1992 <br /> HALOGENATED VOLATILE ORGANICS (EPA 8010) <br /> Analyte Detection Limit Sample Results <br /> Ng/L Ng/L <br /> Bromodichloromethane.................................................... 0.50 ..................................... N.D. <br /> Bromoform......................................................................... 1.0 ..................................... N.D. <br /> Bromomethane.................................................................. 1.0 ..................................... N.D. <br /> Carbontetrachloride......................................................... 0.50 ..................................... N.D. <br /> hlorobenzene ,.c. : ; :`,`> ' r: 0.50 2.8 <br /> Chloroethane ............................................................... 1.0 ..................................... N.D. <br /> 2-Chloroethylvinyl ether.................................................... 1.0 ..................................... N.D. <br /> Chloroform......................................................................... 0.50 ..................................... N.D. <br /> Chloromethane.................................................................. 1.0 ..................................... N.D. <br /> Dibromochloromethane.................................................... 0.50 ..................................... N.D. <br /> 1,2-Dichlorobenzene ';,,R. F 0.50 <br /> 1,3-Dichlorobenzene......................................................... 0.50 ..................................... N.D. <br /> 1,4-Dichlorobenzene......................................................... 0.50 ..................................... N.D. <br /> 1,1-Dichloroethane............................................................ 0.50 ..................................... N.D. <br /> 1,2-Dichloroethane............................................................ 0.50 ..................................... N.D. <br /> 1,1-Dichloroethene............................................................ 0.50 ..................................... N.D. <br /> cis-1,2-Dichloroethene...................................................... 0.50 ..................................... N.D. <br /> trans-1,2-Dichloroethene................................................... 0.50 ..................................... N.D. <br /> 1,2-Dichloropropane......................................................... 0.50 ..................................... N.D. <br /> cis-1,3-Dichloropropene.................................................... 1.0 ..................................... N.D. <br /> trans-1,3-Dichloropropene................................................ 1.0 .................................I... N.D. <br /> Methylenechloride............................................................ 2.0 ..................................... N.D. <br /> 1,1,2,2-Tetrachloroethane................................................. 0.50 ..................................... N.D. <br /> Tetrachioroethene............................................................. 0.50 ..................................... N.D. <br /> 1,1,1-Trichloroethane........................................................ 0.50 ..................................... N.D. <br /> 1,1,2-Trichloroethane........................................................ 0.50 ..................................... N.D. <br /> Trichloroethene................................................................. 0.50 ..................................... N.D. <br /> Trichlorofluoromethane..................................................... 1.0 ..................................... N.D. <br /> Vinylchloride..................................................................... 1.0 ..................................... N.D. <br /> Analytes reported as N.D.were not present above the stated limit of detection. <br /> SEQUOIA ANALYTICAL <br /> 12>-AC`�—( <br /> Belinda C. Vega <br /> Laboratory Director 1121160.KEl <4> <br />