scope:

This procedure will apply to all persons responsible for the planning and supervision of all operations involving access into or work within Confined Spaces

A confined space is a place where there is inadequate ventilation. Such spaces are hazardous in that they may have oxygen deficient, toxic or explosive atmospheres. Examples of types of work which might necessitate entry into a Confined Space include:

• Trenching

• Entry to sewers and underground pits

• Tunnel ventilation system maintenance

• Pumping station maintenance

• SF6 Switchgear Basements

Guidance Note

A confined space does not have to be completely enclosed it depends on the nature of the gas. A gas heavier than air such as Sulphur Hexafluoride will collect in an open top trench or basement.

Purpose

This procedure defines the actions and controls to be applied before entering any Confined Space, to ensure the work can be carried out safely and without risk of injury or death.