EPA Superfund Site

DEWEY LOEFFEL LANDFILL

NY | EPA ID NYD000512335

About this site’s exposure pathways: As of January 2025, there is insufficient information available to determine the site-wide human exposure control status at the Dewey Loeffel Landfill site. Prior to the site being added to the National Priorities List (NPL), the New York State Department of Environmental Conservation (NYSDEC) implemented a number of actions to mitigate potential exposures to humans in the vicinity of the landfill, including containment of the landfill, pumping and treatment of some impacted groundwater, and removal of polychlorinated biphenyl (PCB)-contaminated soil and sediments from tributaries feeding Nassau Lake. EPA has also implemented a removal action that resulted in the construction of a treatment plant that allows collection of groundwater and leachate year-round and on-site treatment (rather than seasonal collection with off-site trucking and treatment). A second removal action was initiated in 2018 to address significant sediment contamination in one of the drainageways feeding Nassau Lake; this removal action was approximately 50% complete in the fall of 2019, however unexpected significant lateral contamination into the sides of the steep banks of the drainageway resulted in the termination of the removal action with the remainder of the drainageway being addressed under the remedial process.. The New York State Department of Health has issued fish consumption advisories for the Valatie Kill, Nassau Lake, and Kinderhook Lake due to the presence of PCBs in fish tissue.

As the site is being addressed by Potentially Responsible Party (PRP) removal actions and a phased remedial program, risk assessments for the entire site are not expected to be completed before 2030. EPA currently anticipates that there will be sufficient data to make a Human Exposure evaluation by September 2030, when the Record of Decision (ROD) is signed.

EPA ensures community participation throughout the remedial process by meeting with residents and affected stakeholders, issuing public notices, and updating fact sheets. A site profile has been established on the EPA website to keep the community informed of recent progress at the site. A Community Advisory Group (CAG) comprised of members representing interests in the community meets regularly and serves as a forum to disseminate Site information and solicit public comments on project activities. Additionally, an EPA Community Involvement Coordinator is assigned to the site and can address specific community concerns as they arise.