So what do you know about vapor intrusion?

No, it is not somebody’s cheap cologne wafting into your space and causing your allergies to act up. 
It is a relatively new issue that arises in hazardous site cleanups and brownfield redevelopment.  After the source of the contamination is removed, the groundwater (http://en.wikipedia.org/wiki/Groundwater; http://www.groundwater.org/) remains.  Groundwater is found at different depths in different climates. The [...]