EPA recommends the Standard Practice for Installing Radon Mitigation Systems in Existing Low-Rise Residential Buildings Changes To: ASTM E-2121

EPA’s Recommended Residential Radon Mitigation Standard of Practice

EPA recommends the Standard Practice for Installing Radon Mitigation Systems in Existing Low-Rise Residential Buildings* for residential radon mitigation. This voluntary, consensus-based standard was developed and issued by the American Society for Testing and Materials International, and is identified as ASTM E-2121.

The Agency first cited ASTM E-2121 in 2003 as a national consensus standard appropriate for reducing radon in homes as far as practicable below the national action level of 4 picocuries per liter (pCi/L) in indoor air. As of May 2006, EPA no longer recommends, and will no longer distribute its own, superseded Radon Mitigation Standards (EPA 402-R-93-078, Revised April 1994).

A single free copy of the ASTM E-2121 standard is available from EPA’s National Service Center for Environmental Publications - http://yosemite.epa.gov/ncepihom/nsCatalog.nsf/SearchPubs?OpenForm, or the Agency’s IAQ-Info hotline, 1-800-438-4318. Copies of the standard may be purchased from ASTMI at http://www.astm.org/cgi-bin/SoftCart.exe/index.shtml?E+mystore 5, or from the American National Standards Institute (ANSI) at www.ansi.org/13 5

*E-2121-03 (February 10, 2003), American Society for Testing and Materials (ASTM) International; an American National Standards Institute (ANSI) approved consensus standard.

If you have questions concerning this policy, contact either Philip Jalbert jalbert.philip@epa.gov or Eugene Fisher fisher.eugene@epa.gov.