Ground Gas Monitoring
Ground Gas Monitoring - Gas risk assessment for residential development near historic landfills
Following identification of several historic and active landfills in the vicinity of a residential development, a gas risk assessment was undertaken to determine the level of gas protection measures required. A series of gas monitoring wells were installed using SWGs very own Dando Terrier window sampling equipment. These were subsequently tested for methane and carbon dioxide using a GA5000 gas analyser.
The monitoring indicated there were minor concentrations of carbon dioxide present on site.
SWG determined that the concentrations were not elevated enough to warrant specific gas protection measures beyond the basic radon protection already required and the use of sound modern construction practices. This was agreed with by the National House Building Council (NHBC) and development was allowed to proceed with significant cost savings for the client.