Superfund Information Systems: Site Profile

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About the Superfund Redevelopment Initiative

This nationally coordinated effort provides EPA and its partners with a process to return Superfund sites to productive use. Learn more at Superfund Redevelopment Initiative.

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Redevelopment at the Site

The 47-acre Tybouts Corner Landfill Superfund site is located in New Castle, Delaware. Site cleanup activities restored natural habitat and native vegetation on land once covered with hazardous waste. A sand and gravel quarry operated at the site until 1968, when the New Castle Department of Public Works converted the site to a landfill. The landfill accepted municipal and household waste until 1971. The landfill waste contaminated groundwater at the site. Investigations discovered contamination in two drinking water wells. In response, EPA added the site to the Superfund program’s National Priorities List (NPL) in 1983. Under EPA oversight, the site’s potentially responsible parties (PRPs) conducted cleanup activities. The PRPs installed water lines to connect residents with affected wells to the public water supply. The PRPs also constructed a landfill cap, a groundwater extraction system, and a gas collection system. They discontinued groundwater extraction in 2007. The PRPs used wildflowers and native grasses to stabilize the ground and prevent erosion on the landfill cap. The area now provides natural habitat.

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Economic Activity at the Site

As of December 2018, EPA did not have economic data related to on-site businesses, or economic data were not applicable due to site use. View information about redevelopment economics at Superfund sites.

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Activity and Use Limitations

At this site, activity and use limitations that EPA calls institutional controls are in place. Institutional controls play an important role in site remedies because they reduce exposure to contamination by limiting land or resource use. They also guide human behavior. For instance, zoning restrictions prevent land uses – such as residential uses – that are not consistent with the level of cleanup. For more background, see Institutional Controls.


Institutional Controls are in placed to restrict groundwater use and protect the remedy in future use.
Additional information about the Institutional Controls are available in the 2015 Five-Year Review (PDF) (page 22-23).

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