GENERAL NORTHWEST PLUME GROUNDWATER SYSTEM DESCRIPTION Sample Clauses

GENERAL NORTHWEST PLUME GROUNDWATER SYSTEM DESCRIPTION. In August 1988, volatile organic compounds (VOCs) and radionuclides were detected in private xxxxx north of Paducah Gaseous Diffusion Plant (PGDP). In response, U.S. Department of Energy (DOE) and the U.S. Environmental Protection Agency (EPA) entered into an Administrative Consent Order under Sections 104 and 106 of the Comprehensive Environmental Response, Compensation, and Liability Act. A site investigation was conducted, and it was determined that the principal contaminants of concern in the off-site groundwater were technetium-99 (99Tc), a radionuclide, and trichloroethene (TCE), an organic solvent. The Record of Decision for Interim Remedial Action of the Northwest Plume at the Paducah Gaseous Diffusion Plant, Paducah, Kentucky, DOE/OR/06-1143&D4, (ROD) was signed in July 1993 (DOE 1993). As stated in the Declaration for the ROD, “The primary objective of this interim remedial action is to initiate a first phase remedial action, as an interim action to initiate control of the source and mitigate the spread of contamination in the Northwest Plume.” Consistent with a 1996 the Explanation of Significant Differences (ESD) to the 1993 ROD, the treatability study included in the ROD was not executed, and the sequence of groundwater treatment steps described in the ROD was reversed to route groundwater through an air stripper first and then through ion exchange resin (DOE 1996). The ROD initiated an interim remedial measure that included the construction and operations of the Northwest Plume Groundwater System (NWPGS). The NWPGS construction was completed in May 1995, with system testing and shakedown through August 27, 1995. The NWP interim remedial action (IRA) System began routine pump-and-treat operations on August 28, 1995. The NWPGS facility is located at PGDP near Paducah, Kentucky. The groundwater treatment system is housed in a pre-engineered metal building and trailer located in the northwest portion of the PGDP. The NWPGS is designed to recover and treat contaminated groundwater, to generate data to determine the treatment efficiency for the extracted groundwater, and to evaluate the effect of extraction on the Regional Gravel Aquifer. The purpose of this Operations and Maintenance (O&M) Plan is to provide information on operation of the NWPGS and to provide data management and reporting requirements to assist in evaluating the effectiveness of the interim remedial action. References herein to any plan or procedure refer to the most recent versi...
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