Record Display for the EPA National Library Catalog


Main Title Sub-Slab Pressure Field Extension in Schools and Other Large Buildings.
Author Harris, D. B. ; Craig, A. B. ; Leovic, K. W. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher 1991
Year Published 1991
Report Number EPA/600/D-91/260;
Stock Number PB92-121268
Additional Subjects Radon ; Schools ; Air pollution control ; Slabs ; Indoor air pollution ; Fans ; Hospitals ; Soils ; Stationary sources ; Buildings ; Active subslab depressurization ; Pressure field extension
Library Call Number Additional Info Location Last
NTIS  PB92-121268 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 20p
The paper discusses EPA's experiences using pressure field extension (PFE) to design active subslab depresurization (ASD) systems to reduce radon levels in old and new schools, including instances where the data collected resulted in the installation of smaller systems than expected and selection of high vacuum fans instead of 'normal' mitigation fans. A central collection system for use under very large slabs is discussed and PFE data are given for a hospital under construction. The most direct method of projecting or measuring the performance of an ASD system is to measure the strength and extent of the pressure field established under the slab. The PFE can be determined (during diagnostics) to help design an ASD system and (following installation) to ascertain system performance. In schools and other large buildings, these data are invaluable to provide a system that will mitigate the building without undue cost escalation.