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1 .Avv %T( <br /> A S S O C I A T E S I N C . <br /> TABLE OF CONTENTS <br /> CONTENT PAGE <br /> I <br /> 1.0 INTRODUCTION.........................................................................................................1 <br /> 1.1 Site Location........................................................................................................1 <br /> 1.2 Background Information ......................................................................................1 I <br /> 2.0 SUBSURFACE CONDITIONS ................................................... ..............2 h <br /> 2.1 Geology...............................................................................................................2 <br /> 2.2 Hydrogeology.............. .................................................................................3 <br /> 3.0 EXTENT OF PETROLEUM IMPACTED SOIL AND GROUNDWATER..............3 <br /> 3.1 Soil......................................................................................................................3 <br /> 3.2 Groundwater.................................................................................................. <br /> ......3 <br /> 4.0 REMEDIAL ALTERNATIVES ...................................................................................4 <br /> 4.1 Natural Attenuation with Groundwater Monitoring..............................................4 <br /> 4.2 Dual-Phase Groundwater and Soil Vapor Extraction............................................5 <br /> 4.3 In-Situ Air Sparging with Soil Vapor Extraction...................................................5 <br /> L5.0 REMEDIAL ALTERNATIVES EVALUATION....................... <br /> 5.1 Alternative 1 -Natural Attenuation with Groundwater Monitoring ..7 <br /> 5.2 Alternative 2 -Dual-Phase Groundwater and Soil Vapor Extraction.....................8 <br />' 5.3 Alternative 3 - In-Situ Air Sparging with Soil Vapor Extraction ...........................9 <br /> 6.0 RECOMMENDATIONS.....................................................................................................10 <br /> y <br /> t <br />