Occupational Hygiene

Local Exhaust Ventilation (LEV)

Controlling exposure through thorough examination and testing of LEV systems

IOM employee stretching a blue cover over a local exhaust ventilation system

Local Exhaust Ventilation (LEV) is often used in the workplace to control exposure to hazardous substances, including fumes, dust and vapours. LEV must be commissioned and maintained to ensure that such control is effective. It is a requirement of the COSHH Regulations that LEV systems are thoroughly examined and tested every 14 months. In addition, regular checks should be carried out by users of the systems to ensure that the required protection is being provided, as originally designed.

During the thorough examination and testing of your systems, one of our qualified and experienced occupational hygienists will carry out a visual examination of the components of the system, followed by measurement of the technical performance to assess the findings against the original specification or recommendations from the Health and Safety Executive (HSE).

On completion of the examinations we will label the systems tested to clearly show whether these have passed or failed the requirements. A detailed report will identify and discuss any concerns, as well as provide advice and recommendations on any action required to improve effectiveness of the system and reduce exposure of the users to hazardous substances.

IOM carries out the standard examination and testing procedures required by HSE Guidance Note HSG 258 'Controlling airborne contaminants at work'. It is our preference to observe the users of the systems to identify any interactions which may be detrimental to the employees’ exposure. We can also collect air samples to measure exposure to hazardous substances and therefore assess the actual effectiveness of the system as used in the workplace.

In addition, we can help create a log book which should be used to keep records of the regular checks, as well as any maintenance and/or repairs carried out on the system.

For more information on local exhaust ventilation please contact us.