Radon occupational exposure

[Field@amrf-po.pmeh.uiowa.edu]

          Any help would be appreciated.

          I understand OSHA limits occupational radon exposure to
          either 30 pCi/L or 0.33 WL based on continuous exposure for
          40 hours per week, 52 weeks per year [29CFR 1910.96(C)(1)].
          Iowa OSHA apparently also requires an area to be posted as
          an "Airborne Radioactive Area" if a worker receives 0.024
          WLM exposure in one week.

          Does anyone know of a standard or recommendation that sets a
          ceiling level for occupational radon exposure?


          Bill Field
          Department of Preventive Medicine
          University of Iowa
          Iowa City, Iowa 52242
          319-335-4413