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PDFWAC 51-51-60101

Appendix F radon control methods.

AF101.1 General. This appendix contains requirements for new construction in jurisdictions where radon-resistant construction is required.
Inclusion of this appendix by jurisdictions shall be required in high radon potential counties as determined in Figure AF101 and as listed in Table AF101(1).
Unvented crawl spaces are not permitted in any high radon potential county. In other areas, requirements of this appendix apply to any structure constructed with unvented crawl spaces as specified in R408.3.
washington: Clark, Ferry, Okanogan, Pend Oreille, Skamania, Spokane, Stevens.
a. EPA recommends that this county listing be supplemented with other available state and local data to further understand the radon potential of Zone 1 areas.
[Statutory Authority: RCW 19.27.074, 19.27.020, and chapters 19.27 and 34.05 RCW. WSR 07-01-090, ยง 51-51-60101, filed 12/19/06, effective 7/1/07.]
Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency.
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