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SEQUOIANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> (510) 686-9600 FAX (510) 686-9689 <br /> EA Engineering Science&Tech. Client Project ID: Arco #548% EA-92-2 Sampled. Mar 24, 1992, <br /> i:41-A Lafayette Circle Sample Descript: Soil, Conc. Received: Mar 25, 1992,.: <br /> :Lafayette, CA 94549 Analysis Method: EPA 8240 Analyzed: Mar 25, 1992',::.;. <br /> :Attention: Brian Thomas Lab Number: 203-1135 ::.:.:::.:. ..:::Reported.:;:.::.;..::Mar..26, 1992 <br /> VOLATILE ORGANICS by GC/MS (EPA 8240) <br /> Analyte Detection Limit Sample Results <br /> Ing/kg 1i9/kg <br /> Acetone.............................................................................. 500 ..................................... N.D. <br /> Benzene.................................•---..................-----................. 100 ---.......................-----...... N.D. <br /> �Bromodichloromethane.................................................... 100 ..................................... N.D. <br /> Bromoform......................................................................... 100 ..................................... N.D. <br /> Bromomethane...............................---....................----•-...... 100 ....................................I N.D. <br /> 2-Butanone........................................................................ 500 ..................................... N.D. <br /> Carbondisulfide.......................................-----..........••--...... 100N.D. <br /> ...---..........................----- <br /> Carbon tetrachloride......................................................... 100 N.D. <br /> Chlorobenzene.................................................................. 100 ........ ........................ N.D. <br /> Chloroethane.............................-•----.................................. 100 N.D. <br /> 2-Chloroethyl vinyl ether................... 500 ........ N.D. <br /> Chloroform....................................................................••--. 100 ..................................... N.D. <br /> �romethane.................................................................. 100 ..................................... N.D. <br /> omochloromethane.................................................... 100 ................I.................... N.D. <br /> 1,1-Dichloroethane............................................................ 100 ........................I............ N.D. <br /> 1,2-DichIoro ethane............................................................ 100 ..................................... N.D. <br /> 1,1-Dichloroethene............................................................ 100 . N.D. <br /> .--.....................------ <br /> cis-1,2-Dichloroethene...................................................... 100 ...... N.D. <br /> trans-1,2-Dichloroethene................................................... 100 ..................................... N.D. <br /> 1,2-Dichloropropane......................................................... 100 ........... ...................... N.D. <br /> cis-1,3-Dichloropropene.................................................... 100 ..................................... N.D. <br /> trans-1,3-Dichloropropene................................................ 100 .......I....................I........ N.D. <br /> Ethylbenzene..................................................................... 100 ...........--.---.................... N.D. <br /> 2-Hexanone...............................•---........................-•----...... 500N.D. <br /> ---.......................--------... <br /> Methylene chloride............................................................ 250 N.D. <br /> 4-Methyl-2-pentanone....................................................... 500 ..................................... N.D. <br /> Styrene.....................................................................•----..--- 100 ..................................... N.D. <br /> 1,1,2,2-Tetrachloroethane................................................. 100 ..................................... N.D. <br /> Tetrachloroethene............................................................. 100 ..................................... N.D. <br /> Toluene.......................................................•---------............. 100 ........,............................ N.D. <br /> 1,1,1-Trichloroethane........................................................ 100N.D. <br /> ...........................------•--• <br /> 1,1,2-Trichloroethane........................................................ 100 N.D. <br /> Trichloroethene........................................•----.................... 100 ..................................... N.D. <br /> Trichlorofluoromethane..................................................... 100 ...........I......................... N.D. <br /> Vinylacetate...................................................................... 100 ..................................... N.D. <br /> Vinylchloride..................................................................... 100 ..................................... N.D. <br /> TotalXylenes.................................................•-•-----........... 100 ..................................... N.D. <br /> ' lytes reported as N.D.were not present above the stated limit of detection, <br /> 5 <br /> u01A ANALYTICAL <br /> Scott A. hieffo <br /> Project Manager 2031135.EEf <2> <br />