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AW4lGEF5 OESGNEFS CANSIlL11Hf5 <br /> TABLE OF CONTENTS <br />' Section Title Page <br />' 10 INTRODUCTION . . . . . . . 1 <br /> 1 1 SCOPE AND PURPOSE . . . . . 1 <br /> 1 2 SITE HISTORY . . . . . . 1 <br />' 1 3 REPORT ORGANIZATION . . 3 <br />' <br /> 20 PHYSICAL CHARACTERISTICS OF THE SITE. : • : : : : ' : . : 4 <br /> 2 1 SURFACE FEATURES 4 <br /> 2.2 SITE GEOLOGY AND HYDROGEOLOGY . . . . 4 <br />' <br /> 22 1 Lithology and Stratigraphic Relationships 4 <br /> 2.22 Hydrogeology and Groundwater Conditions 8 <br /> 2 2 3 Flow Direction and Gradient . . 8 <br />' 2 24 Hydraulic Conductivity . . 8 <br /> 2 2 5 Effective Porosity 11 <br /> 2 2 6 Advective Groundwater Velocity 11 <br /> 2 2 7 Inorganic Groundwater Chemistry and Geochemical Indicators of <br /> Biodegradation 11 <br /> 2 2 8 Groundwater Use 14 <br /> 3 0 NATURE AND EXTENT OF CONTAMINATION 15 <br /> 3 1 SOIL 15 <br />' 3 2 GROUNDWATER 15 <br /> 3 3 PHYSICAL AND CHEMICAL CHARACTERISTICS OF <br /> CONTAMINANTS . . . 15 <br />' 40 FEASIBILITY STUDY 30 <br /> 4 1 TECHNOLOGY IDENTIFICATION AND SCREENING 29 <br /> S 0 ALTERNATIVE DEVELOPMENT AND ANALYSIS 37 <br /> 5 1 ALTERNATIVE I AIR SPARGING/SOIL VAPOR EXTRACTION 36 <br />' S 2 ALTERNATIVE 2 INTRINSIC REMEDIATION WITH MONITORING 37 <br /> 5 3 ALTERNATIVE 3 INSITU BIOREMEDIATION 39 <br />' 60 COMPARISON OF ALTERNATIVES 41 <br /> 70 PROPOSED CLEANUP LEVELS 42 <br />' <br /> 80 REFERENCES 43 <br />' APPENDIX A RESULTS OF BIOSCREEN MODELING <br /> APPENDIX B ALTERNATIVE COST ESTIMATES <br />' LTR0JECTS\SAN10Q1HSA AM0NPL <br />