Public Notice: Hagen Farm Superfund Site Seventh Five-Year Review in Progress
Summary
The U.S. Environmental Protection Agency is conducting its seventh five-year review of the Hagen Farm Superfund site. The 28-acre site is located at 2318 County Highway A Dunkirk, WI. From the late 1950s to 1966, the former on-site gravel pit accepted solvents and other organic materials in addition to municipal waste. Chemicals from the waste, like vinyl chloride and tetrahydrofuran, contaminated soil and groundwater. To better manage the cleanup work, the site is divided into two cleaning areas called operable units (OUs).
Every five years, superfund law requires a status review of sites that have been cleaned up – with waste managed on-site – to ensure the cleanup continues to protect people and the environment.
Review process includes the following:
- Evaluation of background information
- Summary of cleanup requirements
- Report on the effectiveness of the cleanup and any potential future actions
- Analysis of ways for EPA to operate more efficiently
The review, with details about the cleanup progress, will be available by July 2026.
Cleanup of the contamination at the site has included the following:
OU I, the Source Control Operable Unit, addresses waste refuse and sub-waste soils.
- Placing a cap over the combined waste disposal areas,
- Installing and operating an in-situ vapor extraction system through the landfill cap
- Evaluating natural microbial degradation of volatile organic compounds in the waste and sub waste soils during operation of the in-situ vapor extraction system
- Temporarily shutting down in-situ vapor extraction system to determine performance
- Issuing institutional controls to prevent land and groundwater use
OU II, Groundwater Control Operable Unit, addresses the contaminated on- and off-property groundwater
- Pumping and treating extracted on-property and off property groundwater
- Treating and disposing of sludges made from groundwater treatment and treating off gases
- Low flow air sparging systems to help reduce groundwater contamination
- Temporarily shut down low flow air sparging systems to determine performance
- Restoring groundwater quality contaminant levels to meet state or federal standards
- Stopping the flow of contaminated groundwater downgradient of the site to private wells
- Monitoring all private wells located around the site
- Restoring the groundwater to beneficial use
- Issuing institutional controls to prevent the installation of drinking water wells within the disposal area and off property
The five-year review report is an opportunity for you to tell EPA about site conditions and any concerns you have.