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J <br /> -Contents <br /> Section Page <br /> Executive Summary........................................................................................ES-1 <br /> 1 Introduction........................................................................................................ 1-1 <br /> Purpose and Objectives........................................................................................ 1-1 <br /> } Background.......................................................................................................... 1-1 <br /> 2 Interim AS/SVE Development and Progress ..................................................24 <br /> ASIS VE System Overview.................................................................................. 2-1 <br /> Planned Operation and Monitoring .................................................................... 2-1 <br /> AS/SVE System Monitoring Results................................................................... 2-3 <br /> 1 Average-Operating Conditions <br /> Estimated Mass Removal by SVE........................................................... 2-4 <br /> Radius of SVE Influence......................................................................... 2-4 <br /> I <br /> Oxygen Up-Take/Respiration Rate.......................................................... 2-4 <br /> AS/SVE Progress Summary and Conclusions..................................................... 2-8 <br /> 3 Supplemental Site Characterization, Groundwater Modeling, <br /> and Monitoring................................................................................................3-1 <br /> Exploratory Drilling and Hydropunch Sampling ................................................ 3-1 <br /> Permitting Requirements.................. ...................................................... 3-1 <br /> FieldWork............................................................................................... 3-1 <br /> Lateral Limit of the Gasoline Plume ....................................................... 3-2 <br /> Monitoring Well Installation............................................................................... 3-2 <br /> rAquifer Pump Testing. ...................................................................... .............. 3-4 <br /> i Pump Testing Procedures and Results..................................................... 3-4 <br /> Aquifer Parameter Analysis...................................................................... 3-6 <br /> Groundwater Modeling. .................................................................................... 3-11 <br /> Hydrogeological Observations .......................................................................... 3-14 <br /> LocalGeology ....................................................................................... 3-14 <br /> Local Hydrology.................. ........`............................. 3-15 <br /> Quarterly Groundwater Monitoring.... .... .. .. ...... ... ...... .. ............................. 3-15 <br /> Shallow Groundwater Gradient............................................................. 3-15 <br /> 1 Vertical Groundwater Movement.....................................................:.... 3-21 <br /> Analytical Results.......................................................................... .... 3-21 <br /> Site Character Summary.................................................................................... 3-24 <br /> i� <br /> 1 <br /> 4 Groundwater Remediation.Options..................................................................4-1 <br /> Hydrogeological Conditions Summary ...............................................................4-1 <br /> Assessment of Risk..............................................................................................4-1 <br /> Source and Extent of Contamination.......................................................4-1 <br /> Fate and Transport......... . ..................................................................... 4-2 <br /> i <br /> Exposure Path Analysis.................................................................. .....4-2 <br /> r SF01003097F.DOC 11 <br />