Toxic TCE vapors are entering homes in Dayton. Though EPA is on the case, they've run into a few complications:

Efforts to make homes safe from contaminated groundwater fumes near the Behr Dayton Thermal Products plant, 1600 Webster St., have run into problems at as many as 10 homes.

And the effort to clean indoor air contamination at a nearby school is ongoing, authorities have said.

TCE fumes have migrated from the soil into the homes, businesses and schools, creating potentially hazardous vapors.

In homes that have dirt basement floors, those floors must be sealed for the air evacuation systems to work properly, said Mark Case, director of environmental health for Public Health Dayton & Montgomery County.

Levels of contamination in the problematic homes have reportedly dropped below 10 ppb. That's still 25 times the Ohio Department of Health's exposure limit of .4 ppb.

Read the full article in the Dayton Daily News.