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TABLE OF CONTENTS-Continued F€ ores-Continued FIGURE 18 Approximate Lateral Extent of Vadose Soil Contaming TPH as Gasoline in Concentrations Greater Than 100 mg/kg Following Remediation FIGURE 19 Approximate Lateral Extent of Vadose Soil Containing TPH as Diesel in Concentrations Greater Than 100 mg/kg Following Remcdtatton FIGURE 20 Geologic Cross Section Location Map Following Remediation FIGURE 21 Approximate Vertical Extent of TPH as Diesel in Vadose Soil Along Geologic Cross Sections A-A' and B-B' Following Remediation FIGURE 22 Approximate Vertical Extent of TPH as Gasoline in Vadose Soil Along Geologic Cross Sections A-A' and B-B' Following Remediation FIGURE 23 Approximate Vertical Extent of TPH as Diesel in Vadose Soil Along Geologic Cross Section C-C' Following Remediation FIGURE 24 Approximate Vertical Extent of TPH as Gasoline in Vadose Soil Along Geologic Cross Section C-C' Following Remediation FIGURE 25 Extent of Layers A through G Used for Calculations of Hydrocarbons Present Prior to Remediation FIGURE 26 Extent of Layers B through G Used for Calculations of Hydrocarbons Existing Following Remediation FIGURE 27 Estimated Value of Dissolved Total Petroleum Hydrocarbons as Gasoline Based on First Quarter 1994 Quarterly Monitoring FIGURE 28 Estimated Size of Hydrocarbon Plume in Ground Water - March 21, 1994 FIGURE 29 Estimated Value of Dissolved Total Petroleum Hydrocarbons as Gasoline Zone 2 Based oa First Quarter 1996 Quarterly Monitoring FIGURE 30 Estimated Value of Dissolved Total Petroleum Hydrocarbons as Gasoline Zone 1 Based on Fust Quarter 1996 Quarterly Monitoring FIGURE 31 Estimated Size of Hydrocarbon Plume in Ground Water - June 24, 1996 Appendices APPENDIX A DuPont Biosystems Isopleth Map of Benzene Concentrations in Ground Water 10/25/88 APPENDIX B Methodology and Mass for UST Removal APPENDIX C EVAX and RRM Operational Data Tables APPENDIX D Calculations of Hydrocarbons in Soil Prior to Remediation APPENDIX E Calculations of Hydrocarbons in Soil Following Remedtation APPENDIX F Percent Reduction Calculation of Petroleum Hydrocarbons APPENDIX G Calculations of Petroleum Hydrocarbons in Ground Water Prior to Remediation APPENDIX H Calculations of Petroleum Hydrocarbons in Ground Water Following Remediation APPENDIX I Properties of Chemicals of Concern APPENDIX J Summary of COC Distribution APPENDIX K Modeling Input Parameters - Tier 1 APPENDIX L Vapor to Enclosed Space Pathway Model Description-Tier 1 APPENDIX M Modeling Results -Tier 1 and Tier 2 APPENDIX N Soil Leaching to Ground Water Pathway Model Description- Tier 2 APPENDIX O Ground Water Ingestion and Soil Leaching Tier 2 Inputs and Results iii