Main Title |
Testing of Indoor Radon Reduction Techniques in 19 Maryland Houses. |
Author |
Gilroy, D. G. ;
Kaschak., W. M. ;
|
CORP Author |
CDM Federal Programs Corp., Fairfax, VA.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab. |
Publisher |
Jun 90 |
Year Published |
1990 |
Report Number |
EPA-68-02-4268; EPA/600/8-90/056; |
Stock Number |
PB90-244393 |
Additional Subjects |
Air pollution abatement ;
Radon ;
Slabs ;
Houses ;
Maryland ;
Revisions ;
Performance evaluation ;
Sealing ;
Linings ;
Basements ;
Indoor air pollution ;
Depressurization ;
Soil-structure interactions ;
Radiation monitoring ;
Mitigation
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB90-244393 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
289p |
Abstract |
The report gives results of testing of indoor radon reduction techniques in 19 existing houses in Maryland. The focus was on passive measures: various passive soil depressurization methods, where natural wind and temperature effects are utilized to develop suction in the system; and sealing of radon entry routes into the house. Active (fan-assisted) soil depressurization techniques were also tested. Passive soil depressurization systems typically gave moderate radon reductions (30-70%), although the reductions ranged from zero to 90%. Only two houses were reduced <4 pCi/L with the passive systems. A passive system is most likely to be successful when sub-slab communication is very good, when the house has a basement with no adjoining slab-on-grade or crawl-space wings, and when the foundation walls are poured concrete instead of hollow block. Entry route sealing as a stand-alone radon mitigation measure gave zero-50% reduction in the only house where it was tested. Active soil depressurization, tested in 18 houses, reduced 16 of them <4 pCi/L, and 12 of them <2 pCi/L; reductions were often >90%. Poor sub-slab communication prevented this approach from being fully successful in the other two houses; later modifications to these two systems reduced these houses <4 pCi/L also. |
Supplementary Notes |
See also PB90-222704. Sponsored by Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab. |
NTIS Title Notes |
Final rept. Jan 87-Jun 89. |
Category Codes |
68F; 68A; 89 |
NTIS Prices |
PC A13/MF A02 |
Primary Description |
600/13 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
024227132 |
Origin |
NTIS |
Type |
CAT |