Radon mitigation involves sealing cracks and openings that allow radon gas to enter a building. It's usually done by adding a layer of insulation over the foundation walls and floors.
Cottonwood Wash Abandoned Mine Reclamation Project: A Partnership in Watershed Reclamation Funding Federal Agencies: Interdepartmental Abandoned Mine Land Watershed ...
... is widespread potential for radon exposure in homes coast to coast as well as workplaces! ... Projecting risks to the residential setting they concluded ...