Record Display for the EPA National Library Catalog


Main Title Radon in Schools.
Author Leovic, K. W. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher c1989
Year Published 1989
Report Number EPA/600/D-89/206;
Stock Number PB90-132929
Additional Subjects Radon ; School buildings ; Air pollution control ; Heating ; Ventilation ; Air conditioning ; Design criteria ; Performance evaluation ; Pressurizing ; Indoor air pollution ; Soil gases ; Mitigation ; Case studies
Library Call Number Additional Info Location Last
NTIS  PB90-132929 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 24p
The paper discusses radon entry into schools, radon mitigation approaches for schools, and school characteristics (e.g., HVAC system design and operation) that influence radon entry and mitigation system design. It also discusses mitigation systems installed by the U.S. EPA in four schools. The primary source of radon entry into a school with significantly elevated radon levels is normally soil gas that is drawn in by pressure differentials between the soil surrounding the substructure and the building interior. If the building interior is at a lower pressure than the soil surrounding the substructure and radon is present in the soil, the radon can be pulled in through cracks and other openings that are in contact with the soil. The amount of radon in a given classroom depends on the level of radon in the underlying material, the ease with which the radon moves as a component of the soil gas through the soil, the magnitude and direction of the pressure differentials, the number and size of the radon entry routes, and dilution and mixing of the room air. HVAC systems in schools vary considerably and tend to have greater impact on pressure differentials--and consequently radon levels--than do heating and air-conditioning (HAC) systems in houses.