Radon Migration Through Concrete

["Lavera, Ron" <Ron.Lavera@nypa.gov>]

We have a welded steel lined building that has a substantial amount of
poured concrete inside the building.  The building is about 25 years old.

Can anyone provide information, explanations and/or examples that could
indicate how the airborne radon concentration inside this sealed building
could change by a factor of 10 over an 8 day period ?  The change has been
steady for over a month with little or no variation.

Thank you for your time and consideration.

Ron LaVera
Lavera.r@nypa.gov
************************************************************************
The RADSAFE Frequently Asked Questions list, archives and subscription
information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html