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� S <br /> s <br /> CONTENTS <br /> LIST OF TABLES AND ILLUSTRATIONS iv <br /> 1 INTRODUCTION 1-1 <br /> 2 SITE DESCRIPTION 2-1 <br /> 2.1 Site Background 2-1 <br /> 2.2 Site Geology and Hydrology 2-2 <br /> 2.3 Local Presence of Water Ways and Off-site Wells 2-2 <br /> 2.4 Site Investigations 2-3 <br /> 3 REMEDIAL ALTERNATIVES EVALUATION 3-1 <br /> 3.1 Description of Remedial Alternatives 3-1 <br /> 3.1.1 Air Sparging with Soil Vapor Extraction 3-1 <br /> 3.1.2 Groundwater Extraction and Treatment 3-1 <br /> 3.1.3 Irl-situ Bioremediation 3-2 <br /> 3.1.4 Containment Barriers 3-2 <br /> 3.2 Evaluation of Remedial Alternatives 3-2 <br /> 3.2.1 Air Sparging with Soil Vapor Extraction 3-3 <br /> 3.2.2 Groundwater Extraction and Treatment 3-3 <br /> 3.2.3 Bioremediation 3-3 <br /> 3.2.4 Containment 3-4 <br /> 3.3 Selection of Remedial Alternatives 3-4 <br /> 4 DESCRIPTION OF PROPOSED REMEDIATION SYSTEM 4-1 <br /> 41 Remediation System Design 4-1 <br /> 4.1.1 Location 4-1 <br /> 4.1.2 Assumed (Estimated) Flow Rates 4-1 <br /> 4.13 System Overview 4-2 <br /> 4.2 Equipment 4-2 <br /> 4.3 System Operation and Performance Evaluation 4-2 <br /> 4.4 Implementation Schedule 4-2 <br /> APPENDIX A BORING LOGS <br /> i <br /> ESJ:\E:\USA\00651REPORTS10065P20I.DOC-98usg:1 Rev.0,1/26/99 <br /> 20A41-007.001 lil <br />