My shop is in an extra long one-car garage of a walk-out basement. At the end furthest from the door is where the pipe and wires come into the house for the well pressure pump. This is also right next to my lathe. Where the pipe enters through a hole in the poured basement wall is about four feet underground on the outside. It is also under my deck. When we get heavy rains and the earth is saturated, water leaks through the pipe opening. The opening was poorly sealed when this was originally installed with only spray foam insulation. It should have been tarred from the outside before backfilling. But to correct that now would be a very expensive option. I plan to dig out as much of the useless foam as possible and (try to) plug the leak with something else. Problem is: I don't know what that "something else" should be to seal properly and last. Ideas welcome.