At Roberts Environmental we are experts in Ground Gas Assessments, making us well placed to advise you on any implications this might have on the potential future development of a site.
Ground Gas Assessments are a typical requirement in Planning Applications and it is the experience of Roberts Environmental that where a potential gas hazard has been identified, the Local Authorities are becoming more stringent with regards to the scope of gas protection and validation that they will accept.
Ground gas ingress into buildings can be a significant issue for new developments and has the potential to arise from natural or man-made ground conditions including mining. Ground gas also includes Radon which affects the UK to varying degrees.
Ground gas ingress can cause harm to both health and property, by displacing oxygen causing asphyxiation or poisoning, and by creating a potentially flammable/explosive atmosphere particularly in confined spaces.
In Loscoe Derbyshire in 1986, gas migrating from a recently capped landfill in coal measures caused an explosion which demolished a bungalow and severely injured the two occupants (Ref: CIRIA C665, 2007).
The first stage involves undertaking a Desk Based Review which typically includes:
Stage 2 Stage 2 involves on site ground investigations as follows:
Stage 3 The final stage completes the process and includes:
The client has reassurance that they will not be exposed to any significant residual liability if and when the site is transferred to another owner.The future owner occupier has reassurance that they are not taking on residual liability and agreed sale value is reflected in the condition of the property.
Any future occupants have reassurance that their health and the structural integrity of the property in which they occupy is not at significant risk from ground gas.
Mortgage providers and Insurance companies are provided reassurance that the property provides suitable guarantee for a loan and/or does not represent a significant insurance liability.
The Local Authority is provided with reassurance that their Public Health and Building Control responsibilities have been addressed and the site is suitable for its intended use.
For further information about how we can help you with Ground Gas Assessments please contact a member of the team on 0191 230 4521