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South Dayton Dump and Landfill

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Contact Information

Community Involvement Coordinator
Virginia Narsete (narsete.virginia@epa.gov)
312-886-4359 or 800-621-8431, ext. 64359

Remedial Project Manager
Leslie Patterson(patterson.leslie@epa.gov)
312-886-4904 or 800-621-8431, ext.64904, 9:30 a.m. - 5:30 p.m.

Ohio EPA Project Coordinator
Madelyn Smith


(where to view written records)

Montgomery County Library
Kettering - Moraine Branch
3496 Far Hills Ave.
Kettering, OH 45429-2518
For directions and hours, call the library at 937-227-9509

EPA Records Center
U.S. EPA - 7 th Floor
77 W. Jackson Blvd.
Chicago, IL 60604


The South Dayton Dump and Landfill is a former disposal area for industrial and municipal waste. The site encompasses about 80 acres and includes a 15-acre pond, as well as property now occupied by an operating asphalt plant and other businesses. Open burning, landfilling and storage of hazardous waste throughout its half-century operation resulted in contamination of soil and portions of the groundwater aquifer underneath the site, potentially threatening the neighboring Great Miami River. “Groundwater” is an environmental term for underground supplies of fresh water. Soil pollutants include lead, copper, mercury and other chemicals. Groundwater contamination mainly involves organic chemicals such as tetrachloroethylene, trichloroethylene, or TCE, vinyl chloride and benzene.

In 2006 EPA and the potentially responsible parties, or PRPs, signed an agreement for the Agency to oversee the site while the PRPs investigate the nature and extent of contamination, determine risks posed to human health and the environment and develop cleanup options.

In 2012, EPA documented another environmental problem with the area called “vapor intrusion.” Vapor intrusion occurs when contaminated groundwater gives off vapors or fumes that rise up through the soil and seep into buildings through holes and cracks in foundations and slabs. These hazardous vapors can then cause indoor air pollution. Based on the sampling of groundwater, indoor air and soil gas levels, EPA discovered there was a completed exposure pathway for vapor intrusion at the SDDL site. The document What You Should Know about Vapor Intrusion (PDF) (2pp, 84K) explains the issue in more detail. In order to reduce the sub-slab and indoor levels of TCE and methane, EPA issued an Action Memo in October 2012 that required the PRPs to install sub-slab depressurization systems at several on-site buildings. These systems, similar to radon mitigation systems, have been installed in several buildings along Dryden Road. They draw TCE, methane and other vapors out of the soil under the buildings and vent the gases outside.

In June 2013, the PRPs took additional soil and groundwater samples under EPA oversight in several areas across the landfill to better understand sources of groundwater contamination. The sampling confirmed several groundwater contaminant plumes. A plume is a mass of polluted groundwater that tends to move.

Technical Assistance Grant (TAG) and Community Advisory Group (CAG) are two ways the community can get involved. Learn more about CAGs and TAGs

Site Updates | News Releases | Fact Sheets ||| Legal Agreements || Technical Documents

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Site Updates

April 2015

In January 2015, EPA sent letters to several entities requesting information on their activities related to the South Dayton Dump & Landfill and notifying them of their status as potentially liable parties. EPA is reviewing the responses and plans to sign a new legal agreement with the PRPs to investigate and clean up the SDDL site under Agency supervision.

Regarding the vapor intrusion issue, in the spring of 2015, three buildings continue to show sub-slab TCE concentrations and indoor air concentrations of benzene above levels considered safe by the Ohio Department of Health. Additional mitigation measures may be necessary in these buildings, but indoor sources of benzene have not been ruled out. Two additional buildings may also exceed ODH standards, but additional sampling is needed to confirm the problem.

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