EPA Superfund Site

LINCOLN PARK

CO | EPA ID COD042167858

About this site’s exposure pathways: As of September 2025, the Lincoln Park Superfund Site is considered Insufficient Data to make a Human Exposure evaluation (HEID). Lincoln Park was finalized on the National Priorities List (NPL) in 1984. Because it was historically managed by the Colorado Department of Public Health and Environment (CDPHE) under a Consent Decree-Remedial Action Plan and Radioactive Materials License, there has not yet been a site-wide evaluation of the human health exposure risks under Superfund. However, a human health exposure evaluation was completed for Operable Unit (OU) 2 soils and sediments and found no unacceptable risk. A No Further Action Record of Decision (ROD) was signed for this area in 2002.

EPA uses the HEID Human Exposure status when there is a lack of evidence to suggest that actual or reasonably anticipated human exposures are occurring, and that those exposures are above the acceptable risk-based levels. The planned activities to collect sufficient information to make a human exposure evaluation are underway. A Phase 1 Risk Assessment Quality Assurance Project Plan (QAPP) was submitted in July 2024. The Human Health Risk Assessment will evaluate human interactions with potentially contaminated media including OU1 and OU3 soil, sediment, groundwater, surface water and air, and OU2 groundwater, is in progress and the results will be included in the Final Remedial Investigation Report. EPA currently anticipates that there will be sufficient data to make a Human Exposure determination by September 2027.

To date, EPA suspects that contaminant source areas are within the former Cotter Uranium Mill operations area. Primary contaminants of concern include radionuclides, heavy metals, trichloroethylene (TCE), and polychlorinated biphenyls (PCBs). The Remedial Investigation to document the site-wide nature and extent of contamination is underway. The risk evaluation team is evaluating the large amount of historic data, the quality of those data, and preparing a data gaps analysis to inform additional sampling. This does not necessarily mean that unacceptable exposures are occurring.
If you are potentially impacted by risks inherent at this Site, please contact the EPA Project Manager (Paul Stoick, 720-762-0219) or the EPA Community Involvement Coordinator (Brent Campbell, 303-312-6230). The Community Involvement team publishes a quarterly newsletter, holds an annual meeting, and has published several fact sheets for homeowners and realtors in the area. This site has an active Community Advisory Group (CAG). A current and comprehensive repository of Site-related documents can be found at https:⁄⁄cdphe.colorado.gov⁄CLL⁄lincoln-park-Superfund-site.