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�} TABLE OF CONTENTS 1.0 INTRODUCTION................................................................................................................1 2.0 SITE DESCRIPTION........................................................................................................1 21 GENERAL 1 22 PREVIOUS ENVIRONMENTAL WORK 2 23 GEOLOGY AND HYDROGEOLOGY 3 3.0 CORRECTIVE ACTION PLAN COMPONENTS..........................................................5 31 IMPACT ASSESSMENT 5 32 FEASIBILITY STUDY 9 33 CLEANUP LEVELS 12 34 REMEDIAL ACTION PLAN 13 4.0 WORK PLAN FOR ADDITIONAL DELINEATION AND INTERIM REMEDIATION................................................................................................................13 41 PRE-FIELD ACTIVITIES 14 42 DRILLING AND SAMPLING 14 43 MONITORING WELL AND SPARGE POINT INSTALLATION 14 44 WELLHEAD SURVEY 15 45 WELL DEVELOPMENT AND SAMPLING 15 46 LABORATORY ANALYSES 15 . 47 REPORTING 15 48 SCHEDULE 16 5.0 REFERENCES.............................. ... 17 FIGURES Figure 1 Vicinity Map Figure 2 Site Plan Figure 3 Proposed Well Location Map Figure 4 Geologic Cross-Section A-A' Figure 5 TPHg Isoconcentration Map - Shallow Figure 6 Benzene Isoconcentration Map - Shallow Figure 7 MtBE Isoconcentration Map - Shallow Figure 8 TBA Isoconcentration Map - Shallow Figure 9 Construction Details for Shallow Monitoring Well Figure 10 Construction Details for Deep Monitoring Well Figure 11 Construction Details for Shallow Ozone Microsparge Point ,\APPENDIX Appendix A Material Safety Data Sheets for Gasoline Appendix B Interim Remedial Action Test Report at Former Unocal Service Station No 0187 Appendix C Historical Soil and Groundwater Data Tables and Sample Location Figures Appendix D Hydrocarbon Mass Calculations Appendix E GR Field Methods and Procedures i