The site comprised a new railway station. As part of the development works, there was a requirement to remediate former coal workings through a programme of drilling and grouting. It was recognised that during these intrusive works, there was a potential risk of hazardous ground gas emissions due to the introduction of preferential pathways and displacement of ground gas.
Prior to commencement of the drilling and grouting, there was a requirement for a safe system of work to be in place to manage the potential ground gas risk. GGS developed a system of control measures for a range of gases of concern, inclusive of RAG ratings and action levels. Subsequently, GGS supported a safe system of work by:
GGS presence on site ensured that a safe system of work was in place to enable the remediation works to safely commence. Daily site records were provided to The Client to provide evidence that a safe system of work was implemented at all times.
A potential ground gas risk was identified to site operatives during the treatment of former mine workings.
GGS presence on site ensured that a safe system of work was in place to enable the intrusive works to continue and remain on schedule.