I live in western Pennsylvania. (Stockdale,pa) they replaced all of the old gas lines by my house a few weeks ago and they did alot of digging. i dunno if this has anything to do with it or not...
I have the same problem. last week i noticed my basement is flooded with about an inch or two of water in one room. the water has a thick blue oil all in it. I have no idea where its coming from!