We've been in our house 20 years without a wet basement problem. We have cinderblock walls (dry-locked) and a floating slab. (PA) We did a radon test and due to a problem detected my husband filled in the space around the slab with concrete to about 1" below the floor level to reduce the radon level. (There was also a slight musty odor after the spring rainy season.) We have a sump pump hole but never needed a pump. Now we're noticing in one corner there seems to be water seepage on top of the concrete he filled in the trench with. We dry it off and it appears again. Do you have any idea how water could be coming up over the cemented area? It doesn't flow over yet but it also doesn't move either. I am afraid of a problem after heavy rain or snow melt. Is there anything we can do at this point? Is there a way to dig up the concrete he filled in in the corner where the water is without renting a jackhammer?