Diesel Engine Exhaust Emissions COSHH assessment
Diesel engine exhaust from plant, generators and vehicles is a recognised cause of lung cancer. It is a particular risk where engines run in enclosed or poorly ventilated areas.
The hazards
- Contains fine soot particles and harmful gases
- A recognised human carcinogen
- Builds up quickly in enclosed spaces and basements
- Idling plant is a common, avoidable source
Who is at risk
Exposure routes
- Inhalation of exhaust particulate and gases
Health effects
- Lung cancer
- Irritation of eyes and airways
- Worsening of asthma
- Headaches and nausea
Control measures (hierarchy of control)
Controls should be applied in order — eliminate or substitute first, then engineering controls, then PPE as the last line.
- Eliminate idling; switch engines off when not in use
- Use electric or battery plant where possible
- Extract exhaust at source or duct it outside in enclosed areas
- Ensure good ventilation; keep pedestrians away from exhausts
- Fit and maintain particulate filters on plant
PPE & RPE
- RPE only as a last resort where engineering controls cannot fully control exposure
First aid
- Move to fresh air
- Get medical help for anyone with breathing difficulty or signs of carbon monoxide exposure
Workplace exposure limit (WEL)
Relevant legislation & guidance
Diesel Engine Exhaust Emissions COSHH FAQs
Yes where people can be exposed — for example plant, generators or vehicles running in enclosed or poorly ventilated areas. Diesel exhaust is a carcinogen, so the assessment should focus on eliminating idling and ventilating or extracting exhaust.
Stop engines idling, switch to electric plant where possible, extract or duct exhaust away in enclosed areas, keep people clear of exhausts and maintain particulate filters.
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