I want to refinish my basement walls, as they look really bad. I tore down some wood paneling that was starting to warp, and behind that was some styrofoam insulation. Behind styrofoam is 3 mil plastic. Behind that is the concrete which is crumbling to the touch, about 1/8" to 1/4" into the concrete around the frost line. It looks like someone at some point in time put a waterproofing coat on it and this caused the moisture to deteriorate the concrete.
My question is, should I be worried about releasing asbestos in the air from any of the concrete/waterproofing that was done? I've tested linoleum tile, old adhesives, and everything so far has been negative. I'm wondering if all of this crumbling is going to be hazardous.
The house was built in the 1920's. I can provide pictures if necessary.