Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Modeling radon entry into Florida houses with concrete slabs and concrete-block stem walls : Florida radon research program /
Author Revzan, K. L. ; Fisk, W. J. ; Sexton, R. G.
Other Authors
Author Title of a Work
Fisk, William J.
Sextro, R. G.
Sanchez, David C.
CORP Author Lawrence Berkeley Lab., CA. Applied Science Div.;Department of Energy, Washington, DC.;Florida Dept. of Community Affairs, Tallahassee.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher U.S. Environmental Protection Agency, Office of Research and Development, Air and Energy Engineering Researh Laboratory,
Year Published 1992
Report Number EPA/600/R-92/119; DE-AC03-76SF00098
Stock Number PB92-201128
Subjects Radon. ; Architecture, Domestic--Florida.
Additional Subjects Radon ; Mathematical models ; Houses ; Indoor air pollution ; Air pollution control ; Permeability ; Concrete slabs ; Concrete blocks ; Florida ; Stationary sources ; Mass transfer ; Soil gas
Library Call Number Additional Info Location Last
NTIS  PB92-201128 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation 107 pages : illustrations ; 28 cm
The report discusses results of modeling radon entry into a typical Florida house whose interior is slightly depressurized. The model predicts that the total radon entry rate is relatively low unless the soil or backfill permeability or radium content is high. For a fixed soil permeability, the total radon entry rate may be reduced by a factor of 2 or more by (1) decreasing the backfill permeability, (2) making the stem wall impermeable and gap-free (possibly by constructing a one-piece slab/stem-wall footing), or (3) increasing the pressure in the interior of the stem wall (by ensuring that there is a large pressure drop across the slab/stem-wall gap). The part of the house included in the model consists of a concrete slab supported by a permeable concrete-block stem wall and a concrete footing. A region of undisturbed soil extending 10 m beyond and below the footing is also included. The Laplace equation, resulting from Darcy's law and the continuity equation, and the mass-transport equation are solved using a steady-state finite-difference model to determine the pressure and radon concentration fields in the soil. The house and soil are represented as cylindrically symmetric.
"David C. Sanchez, project officer." "June 1992." Includes bibliographical references (pages 21-22). Microfiche.