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Behr Dayton Thermal Systems VOC Plume Site

Site Information
Contact Information

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

Remedial Project Manager, Acting On-Scene Coordinator

Erik Hardin
312-886-2402 or 800-621-8431, Ext. 62402

Agency for Toxic Substance and Disease Registry
Michelle A. Colledge

Ohio EPA
Site Coordinator

Leslie Williams
Ohio EPA Southwest District Office


(where to view written records)

E.C. Doren Branch Library
701 Troy St.
Dayton, OH

FAQ Fact Sheet

The FAQ Fact Sheet is available in English and Turkish.

FAQ: EPA Answers Your Questions About Vapor Investigation (PDF) (4pp, 231 K) November 2014

EPA Buhar Araştırması Hakkında Sorularınızı Yanıtlıyor (PDF)(4pp, 418K) November 2014


The Behr-Dayton Thermal Products LLC plant at 1600 Webster St., Dayton, Ohio, makes vehicle air conditioning and engine-cooling systems. Chrysler Corp. owned and operated this facility from about 1937 until April 2002. Groundwater beneath the plant is contaminated with volatile organic compounds, or VOCs, including the solvent trichloroethene, or TCE. The polluted groundwater has moved to the south-southwest, underneath homes and businesses. That creates a risk of vapor intrusion, in which gases from the VOCs rise up through the ground into buildings, creating indoor air pollution.

Ohio EPA installed seven devices called soil gas probes on Oct. 16, 2006, along Daniel Street, Lamar Street and Milburn Avenue to find out if vapor intrusion was happening. Technicians set the probes about one to two feet above the groundwater, which is approximately 20 feet below the surface. Ohio EPA found these soil gas samples contained high concentrations of TCE.

The state agency formally asked the U.S. Environmental Protection Agency on Nov. 6, 2006, to investigate the possibility of TCE vapors seeping into nearby homes and other buildings. Experts from the Emergency Response Branch of the Superfund Division in U.S. EPA's Chicago regional office tested homes immediately south of the Behr-Dayton plant. Results of those tests showed TCE vapor levels in some homes higher than what the Ohio Department of Health and the federal Agency for Toxic Substances and Disease Registry consider safe.

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

On Sept. 3, 2008, U.S. EPA formally proposed that The Behr-Dayton Thermal Systems VOC Plume Site be placed on the National Priorities List (NPL), a list of the nation's most polluted sites.

Site Updates | News Releases | Fact Sheets || Technical Documents | | Public Meetings || Legal Documents

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Site Updates

January 2015

The public comment period for the engineering evaluation and cost analysis (EECA) report ended December 20, 2014. EPA received a total of three comments on the EECA report.  On January 15, 2015, EPA approved the EECA report as final and included a responsiveness summary for the three public comments. 

Behr EECA approval Letter with Response to Public Comments (PDF) (3 pp, 301 K) Jan. 15, 2015

November 2014

In Turkish: EPA Buhar Araştırması Hakkında Sorularınızı Yanıtlıyor (PDF) (4pp, 418K) November 2014

U.S. EPA just approved a technical report the site owners have prepared that evaluates cleanup options for an area of particularly high pollution levels in the groundwater below the southern edge of the Behr-Dayton facility. “Groundwater” is an environmental term for underground supplies of fresh water. The report is referred to as an “Engineering Evaluation/Cost Analysis” or EE/CA. At this time, U.S. EPA intends to select the cleanup option that involves two steps. In the first step, air is injected underground to turn the contaminants into gases and drive them out of the groundwater and into the air spaces in the surrounding soil. In the second step, the gases are removed from the soil and the pollutants treated before being released to the atmosphere. You will see this technique called “air sparging with soil vapor extraction” in the EE/CA.

Before making a final cleanup decision, EPA will be accepting comments from the public on the EE/CA from Nov. 20 – Dec. 20, 2014. A copy of the EE/CA is available on this website.

The U.S. EPA has recently finalized a new Community Involvement Plan, or CIP, which helps improve and guide communication between the Agency and people who live and work near the site, including public officials. Earlier this year, U.S. EPA experts attended a number of neighborhood meetings as part of the development of the CIP. They spoke to the McCook Neighborhood, Old North Dayton Business Owners Association and the BVOCAL community group. They also had an opportunity to speak with the growing Turkish community through a translator from the Kizer School. Open communications, building trust, listening to concerns and being visible in the community are priorities for U.S. EPA.

U.S. EPA tried to make those responsible for the contamination handle the cleanup but was unable to do so. The Agency began its own investigation through a contractor in late 2009. Study of the site began in the summer of 2010 and continues today. U.S. EPA contractors investigated several facilities in September and November of 2010, trying to identify the source of the contamination. Technicians did extensive sampling and analysis of groundwater in late 2011, and again in the summer of 2012 and spring of 2014 – the most extensive testing so far. The Agency expects sampling to continue into the fall of this year to fill in any gaps in its understanding of the location and amount of pollution associated with the site. The site investigation will continue into 2015, and a complete cleanup decision should be made in early to mid-2016.

To date, about 250 residences and businesses have been equipped with systems that prevent underground vapors from getting into the indoor air. Through its contractor, AECOM, Behr-Dayton monitors existing systems, tests additional residences and business for vapors, and installs new systems when needed. Very few vapor reduction systems have been installed over the last several years, and EPA believes most affected homes and businesses have been identified and tested. However, if you are concerned that your house may need testing, or you are concerned with the operation of an existing vapor reduction system, contact EPA’s Erik Hardin at hardin.erik@epa.gov or 312-886-2402.

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