New York updates vapor intrusion guidance documents: what does this mean to me?

Few people have heard of vapor intrusion, so what, exactly, is it?  In simple terms, vapor intrusion is a process by which subsurface contamination moves into the indoor air space of an enclosed area above it.  It happens when volatile, vapor-forming chemicals move from a subsurface source—say contaminated soils or groundwater—through cracks in foundations or […]