EPA Superfund site
MANSFIELD TRAIL DUMP
Human exposure is NOT currently under control
Data limitations: Proximity to a Superfund site boundary does not mean your property is contaminated. EPA site boundaries show the area designated for cleanup, not the full extent of contamination. Groundwater plumes can extend beyond site boundaries. This tool shows publicly available EPA federal data. It is not affiliated with or endorsed by EPA, and is not a substitute for a professional environmental assessment.
About this site's exposure pathways
As of May 2026, the Mansfield Trail Dump Superfund site is considered “Current Human Exposure Not Under Control” (HENC). Residents, workers, and visitors are known or reasonably anticipated to be exposed through direct contact with lead‑ and polychlorinated biphenyl (PCB)‑contaminated soil on one downgradient residential property. Additional exposure pathways include use of contaminated groundwater and vapor intrusion to indoor air. Point‑of‑entry treatment (POET) systems have been installed at 19 residences to provide safe drinking water where trichloroethylene (TCE) has been detected in groundwater, and sub‑slab depressurization systems are operating in five residences impacted by vapor intrusion.
Currently, the planned activities to address this pathway include constructing a waterline and connecting affected residences to a public water supply under the Operable Unit 1 (OU1) remedy; continuing to operate and maintain POET and sub‑slab systems until permanent remedies are in place; completing design and implementation of the Operable Unit 2 (OU2) remedy for site‑wide contaminated groundwater, residual soil contamination, and related vapor intrusion; and establishing institutional controls (ICs), including a Classification Exception Area (CEA) or Well Restriction Area to prohibit new well installation within the contaminated plume and deed notices for capped areas (no residential properties are included in capped areas). EPA and partners will also conduct long‑term monitoring to verify that cleanup goals are met and ICs remain effective.
If you may be affected, you can reduce your exposure by avoiding contact with bare soils in the affected yard, keeping children and pets away from disturbed soil, washing hands after outdoor activities, maintaining POET and sub‑slab systems per manufacturer and agency guidance, and using public water where available. Follow posted signs and local health advisories. For more information, contact the EPA Community Involvement Coordinator via the site webpage or at (212) 637-3532 or [email protected].
EPA currently anticipates that human exposure will be under control by October 2029 because the OU2 Phase 2 remedial action will be completed, OU1 waterline connections will be in place, ICs will be fully implemented, and confirmation monitoring will demonstrate that risk‑based cleanup goals have been achieved, as reflected in the Superfund Enterprise Management System (SEMS).