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Behr Dayton Thermal Systems VOC Plume Site

The Behr Dayton Thermal Products LLC a manufacturing plant located at 1600 Webster Street, Dayton, Montgomery County, Ohio. This facility manufactures vehicle air conditioning and engine-cooling systems. Chrysler Corporation owned and operated this facility from about 1937 until April of 2002. The ground water beneath this plant was found to be contaminated with volatile organic compounds, or VOCs, including the solvent trichloroethene, or TCE. Polluted ground water from beneath the Behr-Dayton plant has migrated underground to the south/southwest through residential, commercial and industrial areas.

On October 16, 2006, Ohio EPA installed a total of seven soil gas probes along Daniel Street, Lamar Street and Milburn Avenue in Dayton to evaluate the potential risk posed by vapor intrusion from the VOC-polluted ground water groundwater below. The depth of the soil gas probes were approximately one to two feet above the depth of groundwater, which was determined to be approximately 20 feet below ground surface. Air samples were collected and analyzed for VOCs. Ohio EPA soil gas results were found to contain high concentrations of TCE.

On November 6, 2006, Ohio EPA formally requested that U.S. Environmental Protection Agency Region 5 investigate the possibility of TCE vapors seeping into nearby homes and other buildings. In November 2006, Region 5's Superfund Division's Emergency Response Branch tested residences located immediately south of the Behr-Dayton plant. Results from air samples taken beneath the homes tested showed TCE vapor levels above those considered safe by Ohio Department of Health and the federal Agency for Toxic Substances and Disease Registry, or ATSDR.

As a result, Region 5 tested 276 homes in the McCook Field neighborhood for potentially hazardous vapors and installed a mitigation systems in 148 residences (similar to those used for radon) to remove the vapors.

On September 3, 2008, EPA formally proposed The Behr-Dayton Thermal Systems VOC Plume Site be placed on the National Priorities List (NPL). As its name implies, the NPL is a list of the nation's most polluted sites.

How to submit comments about the proposed NPL listing

Please see the following information to comment on the proposal that this site be added to the NPL.

Region 5's Superfund Division has now launched a long-term study to investigate the source and extent of TCE contamination at this site. The results of the study will be used to examine ways to cleanup the site in a way that protects human health and the environment.


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