Record Display for the EPA National Library Catalog


Main Title Reentry of Radon from Mitigation System Outlets.
Author Yuill, G. K. ; Coughlin, R. J. ;
CORP Author Pennsylvania State Univ., University Park. Dept. of Architectural Engineering.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher 1994
Year Published 1994
Report Number EPA-68-D0-0097; EPA/600/A-94/129;
Stock Number PB94-190972
Additional Subjects Radon ; Radionuclide migration ; Air flow ; Radiation monitoring ; Tracer methods ; Sulfur hexafluoride ; Indoor air pollution ; Residential buildings ; Natural radioactivity ; Soil-structure interactions ; Reentry ; Soil gases ; Permeability ; Basements ; Roofs ; Air pollution control ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB94-190972 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 25p
Some radon mitigation systems draw air with a high radon concentration from under the basement floors of houses and exhaust it outdoors. The objective of the project was to measure reentry rates for radon released at roof level and at ground level near a house, to determine whether or not exhaust above the roof is necessary. This was done by using a portable mock-up of a radon mitigation system exhaust, with sulphur hexafluoride (SF6) as a tracer gas. The roof level exhaust produced maximum indoor sulphur hexafluoride concentrations significantly lower than the ground level exhaust. This suggests that the better radon discharge location is on the roof of a house.