"I wonder if the entire basement gets filled with Radon, in the morning, when the
oil burner comes on and creates a negative pressure in the basement.?.
It only runs for 20 or 30 minutes each morning. Hey, maybe it's cleaning the air??"
Measure it when your wife opens the window for fresh air, the warm air in the house escaping needs to be replaced from somewhere and it is likely putting suction on the entire house including these sump holes, since the air is escaping the house, the air to replace it may be pulling on the sumps and sucking radon into the basement and since the window upstairs is drawing air towards it, that would be the one sure fire way to draw that air upstairs. It's easy to test, open a window for the same amount of time your wife normally leaves it open and monitor for a difference.
Other than that radon generally lies low and usually you monitor the lowest occupied level, in reality there probably isn't much upstairs so the radon exposure may be limited. Have you measured the ground level a foot off the ground in a few places?
|