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UNC Chapel Hill Permit <br /> of release of hazardous constituents (Contamination Characterization); and identify actual or <br /> potential receptors. <br /> The investigations should result in data of adequate technical content and quality to support the <br /> development and evaluation of the corrective action plan if necessary. The information contained <br /> in a RCRA Part B permit application and/or RCRA Section 3019 Exposure Information Report <br /> may be referenced as appropriate but must be summarized in both the RFI Workplan and RFI <br /> Report. <br /> All sampling and analyses shall be conducted in accordance with the Sampling and Analysis Plan. <br /> All sampling locations shall be documented in a log and identified on a detailed site map. <br /> A. Environmental Setting <br /> The Permittee shall collect information to supplement and/or verify Part B information on the <br /> environmental setting at the facility. The Permittee shall characterize the following as they <br /> relate to identified sources,pathways and areas of releases of hazardous constituents from <br /> Solid Waste Management Units. <br /> 1. Hydrogeology <br /> The Permittee shall conduct a program to evaluate hydrogeologic conditions at the <br /> facility. This program shall provide the following information: <br /> a. A description of the regional and facility specific geologic and hydrogeologic <br /> characteristics affecting ground-water flow beneath the facility, including: <br /> i. Regional and facility specific stratigraphy: description of strata including <br /> strike and dip, identification of stratigraphic contacts; <br /> ii. Structural geology: description of local and regional structural features (e.g., <br /> folding, faulting, tilting,jointing, etc.); <br /> iii. Depositional history; <br /> iv. Regional and facility specific ground-water flow patterns; and <br /> v. Identification and characterization of areas and amounts of recharge and <br /> discharge. <br /> b. An analysis of any topographic features that might influence the ground-water <br /> flow system. <br /> c. Based on field data, tests, and cores, a representative and accurate classification <br /> and description of the hydrogeologic units which may be part of the migration <br /> pathways at the facility(i.e., the aquifers and any intervening saturated and <br /> unsaturated units), including: <br /> i. Hydraulic conductivity and porosity(total and effective); <br /> ii. Lithology, grain size, sorting, degree of cementation; <br /> iii. An interpretation of hydraulic interconnections between saturated zones; and <br /> B-6 <br />