In 2011, a Human Health Risk Assessment (HHRA) characterized potential human health risks associated with future use of the Site as a passive recreational area. The HHRA concluded the Polychlorinated Biphenyl (PCB) Impacted Area could pose risks to human health on presumed exposure to PCBs, antimony, lead, and nickel. An Environmental Risk Assessment occurred after the HHRA.
The Decision Document’s Remedial Action Objective (RAO) is to reduce human health and ecological risks associated with exposure to PCBs, dioxin, and metals in the PCB Impacted Area. The selected remedy included excavating and transporting offsite fill material with PCBs, constructing a soil cover over residual PCB-contaminated fill material, wetland replication (referred to Compensatory Wetlands), and institutional controls. The site achieved construction completion with the completion of the Remedial Action Closeout Report on 30 September 2014. The United States Army Corps of Engineers (USACE) constructed the remedy in accordance with the 2012 Decision Document requirements and the 2013 Remedial Action Work Plan. Since completion, the USACE has overseen the long term monitoring and completion of the first Five Year Review in 2018. A Grant of Environmental Restriction and Easement (GERE), which includes land use controls limiting site and intrusive activities was also completed.