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I <br />' TABLE OF CONTENTS <br /> 1.0 INTRODUCTION 1 <br /> 2.0 SUBSURFACE INVESTIGATION 2 <br /> 21 Pre-Field Activities 2 <br /> 22 Summary of Unsaturated Zone Soils and Former Tank Pit Area Investigation 2 <br /> 23 Summary of Septic Leach System Area Investigation 3 <br /> 24 Site Hydrogeologic Conditions S <br /> I3.0 SUMMARY OF GROUNDWATER MONITORING EVENT- JUNE 1994 7 , <br /> 3 1 Evaluation of Chemical Concentration Trends 8 <br /> 4.0 MASS VOLUME ESTIMATION 9 <br />' 5.0 FATE AND TRANSPORT MODELING FOR BENZENE ll <br /> 6.0 CONCLUSIONS 13 <br /> 7.0 REFERENCES 14 <br /> LIST OF TABLES <br /> TABLE 1 - Summary of Soil Analytical Laboratory Results <br /> TABLE 2 - Summary of Hydraulic Gradient Flow Conditions <br /> TABLE 3 - Detected Laboratory Analytical Results Summary - June 1994 <br /> TABLE 4 - Parameters Assumed for Fate and Transport Modeling <br /> LIST OF FIGURES <br /> FIGURE 1 - Site Map <br /> FIGURE 2 - Hydrogeologic Cross Section <br /> FIGURE 3 - Well MW-2 Water Level Hydrograph and Detected Benzene Concentrations <br />' LIST OF APPENDICES <br /> APPENDIX A ENSECO Laboratory Analysis Reports - Soil Samples Collected <br /> APPENDIX B SEA COR Field Boring Logs <br /> APPENDIX C ENSECO Laboratory Analysis Reports - Water Samples Collected <br /> APPENDIX D Wallace-Kuhl Geotechnical Testing Results <br /> APPENDIX E GTEL Environmental Laboratories, Inc -Microbial Enumeration <br /> SEACOR° <br /> N0026 001 01 ROF 11 August 1 1994 <br />