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UNC Chapel Hill Permit <br /> 1. Ground-water Contamination <br /> The Permittee shall conduct a ground-water investigation to characterize any plumes of <br /> contamination detected at the facility. This investigation shall at a minimum provide <br /> the following information: <br /> a. A description of the horizontal and vertical extent of any plume(s) of hazardous <br /> constituents originating from or within the facility; <br /> b. The horizontal and vertical direction of contamination movement; <br /> c. The velocity of contaminant movement; <br /> d. The horizontal and vertical concentration profiles of hazardous constituents in the <br /> plume(s); <br /> e. An evaluation of factors influencing the plume movement; and <br /> f. An extrapolation of future contaminant movement. <br /> The Permittee shall document the procedures used in making the above determinations <br /> (e.g., well design, well construction, geophysics, modeling, etc.). <br /> 2. Soil Contamination <br /> The Permittee shall conduct an investigation to characterize the contamination of the <br /> soil and rock units above the saturated zone in the vicinity of any contaminant release. <br /> The investigation may include the following information: <br /> a. A description of the vertical and horizontal extent of contamination; <br /> b. A description of appropriate contaminant and soil chemical properties within the <br /> contaminant source area and plume. This may include contaminant solubility, <br /> speciation, absorption, leachability, exchange capacity, biodegradability, <br /> hydrolysis,photolysis, oxidation and other factors that might affect contaminant <br /> migration and transformation; <br /> c. Specific contaminant concentrations; <br /> d. The velocity and direction of contaminant movement; and <br /> e. An extrapolation of future contaminant movement. <br /> The Permittee shall document the procedures used in making the above determinations. <br /> B-11 <br />