Vapor Air Quality Regulations

The Maine Indoor Air Quality Council has recently made us aware of changing indoor air quality regulations as they relate to vapor-

“Vapor intrusion is the process by which chemicals such as petroleum products, chlorinated solvents, and radon that may be present in the subsurface, ground water or soil gas underneath a building can migrate to the indoor air of occupied buildings.”

“The U.S. EPA and the Maine Department of Environmental Protection have issued “guidance” limits for the chemicals associated with vapor intrusion.  These limits are rigorous:  they address long-term exposures, not just short-term exposures, and they fall well below OSHA limits for the same chemicals.”