EPA Superfund Site

PADUCAH GASEOUS DIFFUSION PLANT (USDOE)

KY | EPA ID KY8890008982

About this site’s exposure pathways: As of September 2023, there is insufficient information to determine the site-wide Human Exposure Control status at the Paducah Gaseous Diffusion Plant (PGDP). Sources of TCE contamination to groundwater have resulted in three major plumes at PGDP including the Northeast and Northwest plumes that are the largest in the DOE Complex, extending off-site to the Ohio River. DOE has established a plan to investigate and remediate known source areas in the Plant Industrial Area with Remedial Action Completions targeted in FY2031 (C400 Complex OU) and FY2052 (Southwest Plume Sources). Additional sources are suspected to underlie buildings and groundwater modeling indicates additional TCE sources may exist within the Plant footprint:

In March 2018, EPA requested scoping and implementation of a programmatic effort to evaluate the VI pathway in those areas of the Plant that overlie the TCE plumes, with a focus on areas with workers are present and anticipated will continue to be present for the foreseeable future and areas of proposed new building construction. DOE’s Report is under review.

The Environmental Indicator for Human Exposure Under Control should remain “insufficient data” until EPA and the Commonwealth of Kentucky have either concurred on the Report or either party has requested Additional Work (FFA Section XIX) that, per the MOA, may include Remedial Investigation, Removal Actions and Early (remedial) Actions to address Plant Industrial Area vapor intrusion concerns.