Occupational Exposure Limits for Radon Exposure

[FIELDRW@aol.com]

Radsafers,

Are you aware of any existing Federal or State regulations limiting
occupational radon exposure.

The MSHA (30 CFR 57.5039) states " ...persons should not be exposed to air
containing concentrations of radon daughters exceeding 1.0 WL (100 pCi/L or
3700 Bq/m3) in active work areas."

Is this still the current accepted standard or are there others?  I also
understand OSHA has a 4 WLM standard.  Any insights would be appreciated.
Please email me directly at:  mailto:bill-field@uiowa.edu

Thanks for your help --

Bill Field
bill-field@uiowa.edu
************************************************************************
The RADSAFE Frequently Asked Questions list, archives and subscription
information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html