"Scout" wrote in message

by seal you mean the outside walls? during construction? do you know of
any seal that can be done on the inside basement wall post-construction?
From what I've heard, the recommended levels will probably change in the
future, as the current limit of 4 pc's was extrapolated from data gathered
on uranium miners.

The meters are not really accurate..... in other words you won't get the
same reading twice in the same place and many conditions can affect the
results. By seal I mean that no apparent cracks in the floor or foundation.
Radon is released at very low volumes and cannot penetrate airtight
structures. If in doubt apply an expoxy seal to the basement floor and
walls. Make certain the house pad is extended at least a meter and a half
beyond the foundation and has a gradation to provide a sufficent void
ratios.

yeah, there was some coliform in the well water I forgot to mention.
Probably due to the s.sys. but who knows. there are lots of farms around,
could be from manure fertilizer.

At that point I would suggest tapping a much deeper aquifer and sealing the
drill hole. It's amazing that to this day some of the inspectors will
certify a septic system located up stream of the well with no testing to
confirm substrate conditions or seepage.

CM