Main Title |
Follow-Up Radon Measurements in 14 Mitigated Schools. |
Author |
Dehmel, J. C. ;
McCloskey, P. L. ;
Mollyn, G. ;
|
CORP Author |
Cohen (S.) and Associates, Inc., McLean, VA.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab. |
Publisher |
Oct 93 |
Year Published |
1993 |
Report Number |
EPA-68-DO-0097; EPA/600/R-93/197; |
Stock Number |
PB94-114758 |
Additional Subjects |
Radon ;
Air pollution monitoring ;
School buildings ;
Indoor air pollution ;
Natural radioactivity ;
Alpha detection ;
Alpha particles ;
Soil gases ;
Soil-structure interactions ;
Environmental surveys ;
Active soil depressurization
|
Internet Access |
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB94-114758 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
68p |
Abstract |
The report gives results of a determination of the long-term performance of radon mitigation systems installed in U.S. EPA research schools: radon measurements were conducted in 14 schools that had been mitigated between 1988 and 1991. The follow-up ATD measurements indicate that, overall, active soil depressurization (ASD) systems have been very effective in maintaining low long-term radon levels in the 14 schools. Of the 409 locations measured in these schools, only 17 (4%) of the measurements in mitigated areas exceeded 4 pCi/L. Eight of the 17 measurements were in the one basement school that was measured, one was in a room where the ASD fan had been turned off, and another was in a room with building pressurization that is operated only when the building is occupied. If these 10 measurements are dropped from the set, rooms above 4 pCi/L drop to < 2%. |