Remedial Investigation Feasibility Study Work Plan Former Koppers Site Charleston South Carolina

The purpose of the Work Plan is to provide a detailed scope of work and technical approach to successfully complete EPA Work Assignment No. 108.4LA4, dated March 1985. Objectives/Problem Quantification: • To determine the presence or absence of chemical contamination on the site proper, including former spray fields, trash disposal area, two former holding ponds, former waste lagoon, and office & production areas • Hydraulically characterize the water table aquifer in the near vicinity of the site (depth to water table, gradient, aquifer thickness, permeability, flow direction & velocity • Determine the presence or absence of site-related chemical contamination within the water-table aquifer • Determine the potential for the water-table aquifer to be hydraulically connected to the Floridan Aquifer • Determine the presence or absence of site-related chemical contamination in surface water, sediments & wetland areas that are contiguous to the site • Compile a data base that will support a site-related Public Health and Environmental Assessment • Conduct a site-related Public Health and Risk Assessment that will evaluate: existing & potential pathways for contaminant transport; location of existing & potential receptors; risk to receptors associated with existing or potential exposure to site-related contaminants • Determine the need to collect additional data to further define site characteristics. FS Objectives: • Identify candidate remedial alternatives • Evaluate candidate remedial alternatives to support EPA selection of preferred alternatives. The need for performing additional RI work & for conducting the optional FS will be decided by EPA after review of results generated in this study.

This work plan has been prepared to document the scoping and planning process performed by the US Department of Energy (DOE) to support remedial action activities at the Colonie site. The site is located in eastern New York State in the town of Colonie near the city of Albany. Remedial action of the Colonie site is being planned as part of DOE's Formerly Utilized Sites Remedial Action Program. The DOE is responsible for controlling the release of all radioactive and chemical contaminants from the site. Under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), a remedial investigation/feasibility study (RI/FS) must be prepared to support the decision-making process for evaluating remedial action alternatives. This work plan contains a summary of information known about the site as of January 1988, presents a conceptual site model that identifies potential routes of human exposure to site containments, identifies data gaps, and summarizes the process and proposed studies that will be used to fill the data gaps. In addition, DOE activities must be conducted in compliance with the National Environmental Policy Act (NEPA), which requires consideration of the environmental consequences of a proposed action as part of its decision-making process. This work also describes the approach that will be used to evaluate potential remedial action alternatives and includes a description of the organization, project controls, and task schedules that will be employed to fulfill the requirements of both CERCLA and NEPA. 48 refs., 18 figs., 25 tabs.