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Enterprise Avenue

Current Site Information

EPA Region 3 (Mid-Atlantic)

Pennsylvania
Philadelphia

EPA ID# PAD980552913

1st Congressional District

Last Update: February 2014

Other Names

None

Current Site Status

The remedy for the Enterprise Avenue Landfill is complete and currently the groundwater is monitored. The remedy occurred in phases that included the removal of contaminated soil, installation of a landfill cover, and groundwater monitoring.

EPA conducted a review, called a Five-Year Review, of the actions at the Site and issued a report on March 26, 2012. The Five-Year Review Report concluded that the Site is protective of human health and the environment. The next five-year review is due March 2017.

In 2008, EPA and the City of Philadelphia (City) agreed to study the groundwater. The groundwater extraction wells were temporarily shutdown, additional monitoring wells were installed, and the City is currently evaluating options for groundwater remediation. Based on the study results, EPA will determine the appropriate actions for groundwater.

The proposed Capacity Enhancement Program for the Philadelphia International Airport may impact the Site. EPA is coordinating with the Philadelphia International Airport and Federal Aviation Administration to ensure that all appropriate measures are taken to maintain the protectiveness of the remedy for the landfill and impacted groundwater.

Site Description

The Enterprise Avenue Landfill Site (Site) is located in the City of Philadelphia at the Philadelphia International Airport. The Site was formerly used as a landfill for disposal of incineration residue, fly ash, and bulky debris. The Site has been redeveloped into a commuter runway, Runway 8-26.

Site Responsibility

This Site is being addressed through federal, state, and municipal actions.

NPL Listing History

This Site was proposed to the National Priorities List (NPL) on December 30, 1982 and formally added to the list on September 8, 1983. The Site was deleted from the NPL on March 7, 1986.

Threats and Contaminants

Soil on-site was contaminated with various organic compounds from the drums that contained wastes such as paint sludges, solvents, oils, resins, metal finishing waste, and solid inorganic wastes. Potential risks existed if direct contact was made with contaminated soil or if soil was accidentally ingested. Chemicals detected in the groundwater include benzene, dichloroethene, and vinyl chloride.

Contaminant descriptions and risk factors are available from the Agency for Toxic Substances and Disease Registry, an arm of the CDC.

Cleanup Progress

In 1982, the City began Phase I of the cleanup which included the removal and off-site disposal of all drums and the identification of 39,150 tons of contaminated soil. Soil on-Site was contaminated with wastes such as paint sludges, solvents, oils, resins, metal finishing waste, and solid inorganic wastes. Potential risks existed if direct contact was made with contaminated soil or if soil was accidentally ingested. The City spent approximately $8.3 Million for Phase I cleanup and related investigative and engineering activities. Due to financial limitations, only 21,350 tons of the contaminated soil was disposed off-Site. the remaining contaminated soil was stockpiled on-Site in two separate piles, and a partial cover was installed.

On May 10, 1984, EPA signed a Record of Decision (ROD) requiring the removal of the remaining contaminated soil and placement of a final cover over the landfill. The required work was considered Phase II of the remedial work. The cost of Phase II was approximately $3.5 million. The City received a Superfund grant for a portion of the Phase II clean-up activity. Construction was started in August 1984 and was completed in March 1985.

EPA and the Pennsylvania Department of Environmental Resources (PADER) determined that the Site had met all cleanup criteria and, therefore, the Site was deleted from the National Priorities List (NPL) on March 7, 1987.

Redevelopment:

In December 1999, the City of Philadelphia Department of Aviation (DOA) completed the construction of a new 5,000-foot runway (Runway 8-26) at the Philadelphia International Airport. Runway 8-26 crosses atop the Enterprise Avenue Landfill.

On September 24, 1994, the Federal Aviation Administration (FAA) issued a conditional Finding of No Significant Impact (FONSI) for the environmental aspects of the runway project. EPA commented on the FAA's finding, pointing out that the runway project could potentially disturb contaminants in the landfill, which could potentially affect the New Jersey Coastal Plain Sole Source Aquifer. This valuable water resource flows beneath the Enterprise Avenue Landfill. EPA recommended that the landfill be capped and that a groundwater monitoring system be installed around the perimeter of the landfill. The cap was completed in October 1997. Groundwater extraction and treatment began in May 1997.

EPA negotiated an agreement with the City of Philadelphia, signed in June of 2002, that requires the City to continue the groundwater remedy.

In 2008, EPA and the City of Philadelphia (City) agreed to study the groundwater. The groundwater extraction wells were temporarily shutdown, additional monitoring wells were installed, and the City is currently evaluating options for groundwater remediation. Based on the study results, EPA will determine the appropriate actions for groundwater.

Contacts

Contacts

Administrative Record Locations

Region 3 | Mid-Atlantic Cleanup | Mid-Atlantic Superfund |EPA Home | EPA Superfund Homepage


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