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Table of Contents <br /> 1 <br /> Section1. Introduction.............................................................................................................1-1 <br /> 1.1 Introduction......................................................................................................................1-1 <br /> ' 1.2 Site Description and Features .........................................................................................1-1 <br /> 1.2.1 Geology...............................................................................................................1-1 <br /> 1.2.2 Hydrogeology...................................................................................................... 1-2 <br /> 1.2.2.1 Groundwater Flow Rate, Direction, Recharge, and Discharge...........1-2 <br /> 1.2.2.2 Groundwater Use................................................................................1-3 <br /> 1.2.2.3 Extraction Wells Affect on Groundwater Flow ....................................1-3 <br /> 1.2.2.4 Surface Water.....................................................................................1-3 <br /> 1.2.2.5 Hydraulic Connection with Aquifers....................................................1-4 <br /> 1.2.3 Local Land Use................................................................................................... 1-4 <br /> Section 2. Previous Investigations..........................................................................................2-1 <br /> r2.1 Unauthorized Releases ...................................................................................................2-1 <br /> 2.2 Assessment Activities......................................................................................................2-1 <br /> 2.3 UST Site Assessment......................................................................................................2-5 <br /> 2.3.1 Subsurface Lithology..........................................................................................2-5 <br /> 2.3.2 Soil Analytical Data......................................................................................... ...2-6 <br /> NSection 3. Nature and Extent of Subsurface Impacts.............................................................3-1 <br /> 3.1 Extent of Hydrocarbons in Soil ........................................................................................3-1 <br /> 3.1.1 Former Transmix UST........................................................................................3-1 <br /> ' 3.2 Extent of Hydrocarbons in Groundwater .........................................................................3-1 <br /> 3.2.1 2005 Offsite Assessment....................................................................................3-2 <br /> 3.2.2 Former Transmix UST........................................................................................3-2 <br /> 3.3 Remediation.....................................................................................................................3-4 <br /> 3.4 Sources of Offsite Impacts...............................................................................................3-6 <br /> 3.5 Potential Groundwater Receptors ...................................................................................3-6 <br /> rSection 4. Conclusions.............................................................................................................4-1 <br /> Section5. References...............................................................................................................5-1 <br /> Tables <br /> Table 1 Water Wells within One-Mile Radius of the Site <br /> Table 2 Groundwater Elevation, Separate Phase Hydrocarbon, and Analytical Data <br /> Table 3 Groundwater Analytical Data <br /> Table 4 Historical Groundwater Gradient Data <br /> Table 5 Well Construction Details <br /> Table 6 Soil Analytical Data <br /> • <br /> BLASLAND, BOUCK &LEE, INC. <br /> 3124106 engineers,scientists,economists 1 <br /> J:\D0006\44634_00161022_Conceptual Site Model.doc <br />