The risk of ground gases should be routinely measured and assessed on a wide range of sites – particularly those close to in-filled land or mine workings.
As part of our monitoring service, Mayer measures and records:
• Levels of gases including oxygen, carbon dioxide and methane
• Volatile compounds and vapours
• Important flow rates
• Any other gases that may be important on a particular site
Using this information, we assess the risk to the end user and design suitable and cost-effective remedial measures to protect them.
Here we explore some important and perhaps little-known facts about gas monitoring.
Gas monitoring – did you know?
• Landfill permits often stipulate that gas levels must be monitored and reported
• Gas monitoring often forms part of phase II site investigations or planning conditions
• The National House-Building Council (NHBC) typically requires gas monitoring to be carried out if building approval is to be granted
• Current guidance states that such assessments should be undertaken over a period of at least three months, with several visits taking place during this period
• A monitoring programme should reflect differing weather conditions – particularly changes in atmospheric pressure
Where monitoring wells already exist, our skilled specialists are able to accurately measure ground gases and downhole pressure using state-of-the-art field equipment.
Where monitoring wells do not exist, Mayer will design a site-specific monitoring strategy. Using appropriate drilling techniques we will create wells and undertake monitoring.