What are Confined Spaces?
The Health and Safety Executive (HSE) defines a confined space as “a place which is substantially enclosed (though not always entirely), and where serious injury can occur from hazardous substances or conditions within the space or nearby (e.g. lack of oxygen)”. Think of places like mines, cellars, silos, sewers, drains, tanks, water towers, manholes, and access shafts. Essentially, any area with limited entry and exit points can be considered a confined space.
Understanding the Hazards
Confined spaces can harbour a variety of dangers, including:
- Toxic gases: These can be present naturally or result from work processes.
- Oxygen deficiency: This can lead to unconsciousness and death.
- Oxygen enrichment: This creates a serious fire and explosion risk.
- Flammable atmosphere: The presence of flammable gases or dust can lead to explosions.
- Excessive heat: High temperatures can cause heatstroke and other health problems.
- Flowing liquids: These can engulf or drown workers.
Fortunately, these hazards can be monitored to protect workers within the confined space.
Assessing the Risks of Confined Spaces
Once you’ve determined that the work is essential, the first step is to thoroughly assess the confined space. This involves identifying potential hazards, such as toxic gases, oxygen deficiency, flammable substances, and structural instability. Additionally, it’s crucial to consider hazards outside the space that could impact workers inside.
Furthermore, the risk assessment should address other factors like lighting, communication methods, and any specialised equipment needed for the task (e.g., bulky welding tools). These factors influence the operation and must be evaluated to ensure worker safety.
