Poor Air Quality

The unspoken health hazard

Poor air quality puts the health of your workers at risk and can be a particular problem in confined areas. Low levels of oxygen or presence of harmful fumes or chemicals in the air is dangerous to humans and, as well as being potentially fatal, can cause health problems.

The health danger of poor air quality
Health effects of poor air quality:
  • Breathing problems 
  • Asthma 
  • Lung and heart disease 
  • Fatigue
Where ventilation and air quality control is required
Where air quality control is typically needed:
  • Tunnels 
  • Pits 
  • Shafts 
  • Basements
Effective ventilation and air quality control
Effective ventilation methodology:
  • Accurate calculation of fresh air requirements based on site conditions, equipment and work activities
  • Identification of common hazards present: carbon monoxide, methane, nitrogen dioxide, nitrous oxide and hydrogen sulphide
  • Fresh air forced into an area, and sufficient air changes maintained for conditions and hazards present (forcing fresh air in is preferred to extraction in most circumstances)
  • Propulsion and suction combined to draw air through an area, to ensure a regular air change is achieved
  • Surrounding areas investigated to ascertain whether pressure balances need to be considered to protect sensitive environments
  • Air quality regularly monitored to ensure safety is maintained at all times

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