WAC 51-51-0327
Section R327 -- Protection against radon.
R327.1 Protection Against Radon. The radon control provisions
of Appendix F of this code shall apply to buildings
constructed in High Radon Potential Counties (zone 1)
designated in Table AF101 (1). The radon control provisions
of Appendix F of this code shall also apply to all buildings
constructed using the provisions of Section R408.3 Unvented
crawl space compliance method.
[Statutory Authority: RCW 19.27.074, 19.27.020, and chapters 19.27 and 34.05 RCW. 07-01-090, § 51-51-0327, filed 12/19/06,
effective 7/1/07.]