The U.S. Environmental Protection Agency (EPA)'s Office of Superfund Remediation and Technology Innovation (OSRTI) produces various resources on ecological revitalization for EPA site managers, state agency site managers, consultants, and others interested in restoring disturbed sites. These resources include fact sheets (see www.cluin.org/ecorevitalization) and Internet seminars on ecological revitalization (see archived seminars on http://www.cluin.org/live/archive.cfm). This Internet seminar will focus on two case studies where ecological revitalization principles have been put into practice. The two case studies presented in this Internet seminar include the following:
- The Atlas Tack Superfund Site: An Example of Ecological Enhancement as Part of Waste Site Remediation
Adjacent fresh and salt water wetlands were heavily contaminated by discharge and fill of metal plating and enameling waste from the Atlas Tack Superfund site. The site is situated approximately 500 m northwest of Buzzards Bay, designated as an Estuary of National Significance. The remedy includes the removal of nearly 5.5 acres of wetlands; the subsequent mitigation includes vital ecological enhancements that will eliminate much invasive Phragmites vegetation, develop a new fresh water marsh, reintroduce salt marsh to those areas disturbed, and provide a means to eliminate storm water flooding.
As part of the planning for the ecological enhancements, EPA made use of National Oceanic and Atmospheric Administration (NOAA)'s Damage Assessment and Restoration Program (DARP) who act as a Federal natural resource trustee. NOAA contributed to the development of the sediment remedial goals, the wetland removal plan, and greatly assisted the design the mitigation resulting in ecological enhancements at no additional cost to EPA.
At the Atlas Tack site, the specific enhancements include the removal of contaminated fill and the construction of a dike in the northern wetland that will create new fresh and salt water marshes. The EPA contractor, the Army Corps of Engineers (ACOE) and NOAA have jointly designed separate fresh and salt water marshes that will out-compete the Phragmites, provide a means to allow storm water to promptly discharge into the estuary, and create additional estuarine habitat. This Superfund site has used normal remedial funding to create a remedy that enhances the previous ecology while working cooperatively with three Federal agencies.
Elaine Stanley, Remedial Project Manager (RPM) from EPA Region 1 and Ken Finkelstein, NOAA, will present this case study.
- The Cache La Poudre (Poudre) River Site
Encompassing 19 acres along a popular recreational waterway in Fort Collins, Colorado, the Poudre River Site has proved to be an interesting and unique cleanup for the EPA Removal Program. Polycyclic aromatic hydrocarbons (PAH) have been observed in the soils of a former gas plant, in the groundwater underneath a closed landfill, and in the sediments of the Poudre River itself. The contaminants are likely the remnants of former coal to gas processes. The cleanup and protection of the Poudre River involves such intricacies as the creation of a barrier wall, the redirection and treatment of contaminated ground water, and the replacement of non-native vegetation with native species.
Paul Peronard, On-Scene Coordinator (OSC) from EPA Region 8, will present this case study.