A national chain of early childhood education centers chose the location of its Washington D.C. project on property known to have soil and groundwater contamination left behind from its former uses. The building designers chose to employ a vapor intrusion mitigation system.
The bank elected to have a chemical vapor barrier installed because many former car service centers used fluids and chemicals that may have emitted toxic gasses into the subsurface soil vapor.
The GC needed to complete the concrete pour phase of the construction in a timely manner to stay on schedule. In order to meet these specific requirements, the vapor barrier construction would need to be finished in a single day.