DEPARTMENT OF THE ARMY
ETL 1110-3-438
U.S. Army Corps of Engineers
CEMP-ET
Washington, DC 20314-1000
Technical Letter
No. 1110-3-438
15 September 1993
Engineering and Design
INDOOR RADON PREVENTION AND MITIGATION
1. Purpose. This letter provides advance criteria to be used
for prevention and mitigation in indoor radon in newly
constructed buildings.
2. Applicability. This letter applies to HQUSACE elements,
major subordinate commands, districts, laboratories, and field
operating activities (FOA) having military design and
construction responsibility.
3. Action to be Taken. Pending publication of permanent media
guidance, the criteria provided in Appendix A will be used as
interim guidance to prevent and mitigate indoor radon in all
newly constructed and substantially altered Army facilities. The
design requirements set forth in this letter are mandatory.
4. Implementation. This letter will have routine application as
defined in paragraph 6c, ER 1110-345-100.
FOR THE DIRECTOR OF MILITARY PROGRAMS:
1 APPENDIX
APP A - Indoor Radon
Prevention and Mitigation
_________________________________________________
This ETL Supersedes ETL 1110-3--427, 15 June 1990
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