Bryan,

How long have you lived in the house? I'm in Eagan and had some water
in the basement last week for the first time in five years or so. I've
been fighting the moisture thing for the last 25 years with reasonable
success. It was really bad when we first moved in.

I find it hard to believe the Tapcons punctured the vapor barrier
under your slab, unless they were over six inches long. Depending on
the age of your house you may not have a barrier there. Were you in
the house during our last 700 year flood (10 or 12 years ago?). My
guess is you've always had a moisture problem, you just didn't have
enough moisture to experience it.

Good luck.

dss