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1 <br /> TABLE OF CONTENTS <br /> CONTENT PAGE <br /> 1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> ' 2.0 BACKGROUND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 2.1 Site Description 1 <br /> ' 2.2 Proximity of Private, Municipal, and Irrigation Wells 1 <br /> 3.0 REGIONAL GEOLOGY AND HYDROLOGY . . . . . . . . . . . . . . . . . . . . . 2 <br /> 4.0 PREVIOUS WORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 <br /> 41 Underground Tank Removal 3 <br /> ' <br /> 42 Initial Subsurface Investigation 4 <br /> 43 Well Installation 4 <br /> ' 5.0 SITE CHARACTERIZATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 <br /> 51 Soil Lithology 5 <br /> 52 Local Hydrology 5 <br /> �} <br /> 53 Residual Hydrocarbons in Soil 5 <br /> 5 3 1 Toxicity, Persistence and Potential for Contaminant Migration 5 <br /> 54 Dissolved Hydrocarbons in Groundwater 7 <br /> ' 6.0 INTERIM REMEDIATION AND EVALUATION . . . . . . . . . . . . . . . . . . . 7 <br /> 61 Vapor Extraction Test - 7 <br /> ' 62 Excavation Activities 7 <br /> 7.0 SOIL REMEDIATION ALTERNATIVES . . . . . . . . . . . . . . . . . . . . . . . . 8 <br /> ' 71 Alternative 1 - Passive Remediation 9 <br /> 72 Alternative 2 - Soil Excavation and Off-site Disposal 9 <br /> ' 73 Alternative 3 - Soil Vapor Extraction with Groundwater Monitoring 10 <br /> 8.0 REMEDIATION ALTERNATIVES EVALUATION . . . . . . . . . . . . . . . . . 10 <br /> 81 Alternative 1 - Passive Remediation 10 <br /> 82 Alternative 2 - Soil Excavation and Off-site Disposal 12 <br /> 83 Alternative 3 - Soil Vapor Extraction with Groundwater Monitoring 14 <br /> ' 9.0 PROPOSED ALTERNATIVE FOR REMEDIATION . . . . . . . . . . <br /> ' 10.0 PROPOSED SCOPE OF WORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 <br /> 10 1 System Design 17 <br /> 1500471REPORTSICAP 0694 FNL <br />