this seems to be a common problem and I have read many of the posts here. Basically we have water coming in the corner of the basement where washer/dryer/waterheater is. Only happens in rain so i assume its related to that. Only happens ocassionally, not every rain.

We have examined outside and there seem to be several bad slope areas, that probably could be the culprit, but what we noticed is that coming from the gutter near that area is some sort of under the ground thing that I assume is a drainage system of some sort, but we don't know where it comes out at. Could that be the culprit, and what is it?