DrPizza
Administrator Elite Member Goat Whisperer
The abatement guys are in your house for a few minutes. You're there for the majority of the day or at least several hours sleeping. The length of exposure time is pretty key here.
Also, you're exactly right on the dust particle comment. The half life of radon is roughly 3.8 days and I doubt you can hold your breath long enough to get much exposure through just the radon that decays in the air. 🙂
But the radon is usually pretty confined to the basement. Thus, radon abatement professionals might actually spend more time in radon contaminated basements than the typical homeowner.