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vvF-T( <br /> a <br /> • A S S O C I A T E S I N C <br /> TABLE OF CONTENTS <br /> ' CONTENT PAGE <br /> 10 INTRODUCTION 1 <br /> 20 HYDROGEOLOGIC SETTING 1 <br /> ' 30 BACKGROUND 2 <br /> 31 UST REMOVAL 2 <br /> t <br /> 32 SUBSURFACE INVESTIGATION 2 <br /> 33 REMEDIATION ACTIVITIES 5 <br /> 40 EXISTING CONDITIONS 11 <br /> 4 l SOIL CONDITIONS I I <br /> 4 1 1 Site Geology 11 <br /> 4 1 2 Petroleum Hydrocarbons in Soil 12 <br /> 4 1 3 Mass Balance Calculations-Soil 12 <br /> 42 GROUNDWATER CONDITIONS 13 <br /> 42 1 Site Hydrogeology 13 <br /> 422 Petroleum Hydrocarbons in Groundwater 13 <br /> 423 Mass Balance Calculations-Groundwater 16 <br /> 50 MODEL OF GROUNDWATER PLUME 16 <br /> ' <br /> 11 GROUNDWATER FLOW MODEL USING MODFLOW 16 <br /> ' <br /> 52 TRANSPORT MODEL USING MT3D—RUN NUMBER 1 17 <br /> 53 TRANSPORT MODEL USING MT3D—RUN NUMBER 2 17 <br /> ' 60 GROUNDWATER RECEPTOR SURVEY 19 <br /> 70 EVALUATION OF LOW RISK CRITERIA 20 <br /> ' 7 1 LOW RISK GROUNDWATER CASE EVALUATION 20 <br /> 72 APPENDIX B CHECK LIST 22 <br /> 80 CONCLUSIONS/RECOMMENDATIONS 22 <br /> 90 REFERENCES 24 <br /> ' TABLES <br /> ' Table 1 Summary of Soil Analytical Results <br /> Table 2 Summary of Groundwater Analytical Results —TPHg and BTEX <br /> Table 3 Summary of Groundwater Analytical Results—Oxygenates <br /> Table 4 Summary of Groundwater Extraction Well Analytical Results <br /> Table 5 Summary of Groundwater Monitoring Data <br /> Table 6 Input Parameters and Assumptions, MODFLOW and MT3D Models <br /> lie <br /> w 1271421reportslclosure doe <br /> 1 <br />