Sub-slab pressure-field extension in schools and other large buildings. Rept. for 1988-91

Technical Report · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5812070

Harris, D B; Craig, A B; Leovic, K W

The paper discusses EPA's experiences using pressure field extension (PFE) to design active subslab depressurization (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.

• Research Organization: Environmental Protection Agency, Research Triangle Park, NC (United States). Air and Energy Engineering Research Lab.
• OSTI ID: 5812070
• Report Number(s): PB-92-121268/XAB
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540130* -- Environment
Atmospheric-- Radioactive Materials Monitoring & Transport-- (1990-)
AIR POLLUTION
AIR POLLUTION CONTROL
BUILDINGS
CONTROL
DEPRESSURIZATION
DEPRESSURIZATION SYSTEMS
DESIGN
ECOLOGICAL CONCENTRATION
ELEMENTS
FLUIDS
GASES
HOSPITALS
INDOOR AIR POLLUTION
MEDICAL ESTABLISHMENTS
NATIONAL ORGANIZATIONS
NONMETALS
POLLUTION
POLLUTION CONTROL
RADIOECOLOGICAL CONCENTRATION
RADON
RARE GASES
SLABS
SOILS
US EPA
US ORGANIZATIONS