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Main Title Follow-Up Durability Measurements and Mitigation Performance Improvement Tests in 38 Eastern Pennsylvania Houses Having Indoor Radon Reduction Systems.
Author Findlay, W. O. ; Robertson, A. ; Scott, A. G. ;
CORP Author Acres International Corp., Amherst, NY.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher Mar 91
Year Published 1991
Report Number EPA-68-02-4262;
Stock Number PB91-171389
Additional Subjects Radon ; Indoor air pollution ; Performance evaluation ; Radioactive materials ; Design criteria ; Operating costs ; Houses ; Durability ; Installation costs ; Residential buildings ; Source reduction ; Subslab depressurization systems ; Draintile depressurization systems ; Soil gases
Library Call Number Additional Info Location Last
NTIS  PB91-171389 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 492p
Abstract The report gives results of follow-up tests in 38 difficult-to-mitigate Pennsylvania houses where indoor radon reduction systems had been installed 2 to 4 years earlier. Objectives were to assess system durability, methods for improving performance, and methods for reducing installation and operating costs. The durability tests indicated that the 38 systems have not experienced any significant degradation in indoor radon levels or in system flows/suctions, except in 6 houses where system fans failed, and in houses where homeowners turned off the systems. Tests to improve performance indicated that nearly all of the elevated residual radon levels are due to re-entrainment back into the house of very-high-radon exhaust gas from the soil depressurization systems, and to radon release from well water. Tests to reduce system costs showed that premitigation sub-slab suction field measurements can help prevent installation of too many suction pipes when communication is good, but suggest a need for too many pipes when communication is poor. Soil depressurization fans could not be turned down to the extent expected in some systems that were over-designed. Between 6 and 42% of the exhausted air was withdrawn from the house.
Supplementary Notes See also PB88-156617. Sponsored by Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
NTIS Title Notes Final rept. Oct 89-Feb 90.
Category Codes 68F#; 68A; 89B#
NTIS Prices PC A21/MF A03
Primary Description 600/13
Document Type NT
Cataloging Source NTIS/MT
Control Number 116425902
Origin NTIS
Type CAT