I know there is plenty of info on what to do about radon in your home. But, does EPA have any guidance or regulations concerning radon in industrial or commercial buildings?

I don't know about regulations either. Do they have test kits for industrial facilities?

Ivory9,

Since the effects would likely be the same, I would think the requirements and testing would readily transfer over. If you think you may have an issue, OSHA's general duty clause would obligate you to investigate. A quick search on the net indicates that testing is becoming more common for commercial buildings. Finally, the testing is easy and cheap.

MikeCJ