Ellenville Landfill Superfund Site

Ulster County, NY

Using a newly piloted collaborative project delivery approach, Conti remediated the site in record time.

A former scrap metal and battery reclamation facility, the Ellenville Landfill is a 24-acre site in Ulster County where contaminated soils contained volatile organic compounds, such as trichloroethylene, pesticides and polychlorinated biphenyls, and metal concentrations. This caused potentially hazardous conditions for the residents near the landfill, as over 4,000 people rely on the public drinking water supplied by nearby wells. The United States Army Corps of Engineers (USACE) was responsible for remedial action of this Superfund site.

Conti partnered with the USACE, Environmental Protection Agency, New York Department of Environmental Conservation, designers and other stakeholders using early contractor involvement (ECI) to accelerate project completion. This relatively new approach facilitates close collaboration among designers, stakeholders and constructors who work together to identify and solve challenges more efficiently, eliminating separate steps for problem solving and approval.

Conti excavated and removed contaminated soils in six areas of concern, including off-site residential properties. The team took extra measures to ensure safety at all stages of remediation, including evaluations of the potential for harmful soil vapor intrusion and real-time perimeter air monitoring. During the landfill phases, Conti constructed a multilayer impermeable cap for the 12-acre landfill and placed fine grading with three geocomposite layers and rip rap swales on and around each landfill. The team also installed a site-wide groundwater contamination monitoring system.

As a result of partnering with stakeholders using the innovative ECI approach, Conti remediated the site in record time. The project team has delivered industry presentations to share its experience with this successful alternate delivery method.

Conti's remediation of the Ellenville Superfund site was recognized by USACE with the Commander's Coin for Excellence.

Project details

Client USACE Kansas City
Value $6.9M
Status Completed
Key features
  • Performed preconstruction services
  • Excavated 55,000 cubic yards contaminated soil to depths of 20 feet
  • Removed underground storage tanks
  • Installed 12-acre landfill cap
  • Backfilled excavated areas with 33,000 cubic yards of clean material
  • Restored disturbed surfaces to original or proposed plan conditions

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