On Fri, 8 Jan 2016 08:55:24 +1000, "SG1" wrote:


wrote in message
...
VI is the migration of volatile chemicals from the subsurface into overlying
buildings with a potential for health risk due to exposure. Our staff is
experienced in addressing vapor intrusion VI issues through multiple lines
of evidence, including sampling groundwater, soil gas, sub-slab air and
indoor air, and considering building construction model, site geology and
site historical data.
http://www.gonads.com/vapor-protrusion.html

My middle son is good at producing methane.

Presumably he is assured a long and prosperous career in politics.