What Is Local Exhaust Ventilation?

Local Exhaust Ventilation (LEV) is an engineering control system used to reduce exposure to airborne contaminants in a workplace by capturing and extracting the contaminant at the source of the emission.

It is the employer’s responsibility to ensure that exposure is reduced to levels as low as is reasonably practicable. In many cases, LEV is the solution.

LEV Testing

How Often Do I Need Local Exhaust Ventilation Testing?

As LEV is a control measure under the The Control of Substances Hazardous to Health (COSHH) Regulations it must be regularly and thoroughly inspected and tested and states that any employer who uses Local Exhaust Ventilation to control hazardous substances, must ensure that it is operating effectively.

For most systems, the maximum time between tests is no longer than 14 months. But certain LEV systems, require more frequent inspection (stated in the Regulations) in order to meet this legislation, and visual inspection of the system to ensure integrity.

What Does An LEV Test Consists Of?

System performance data will be obtained on static pressure, transport and face velocities, capture design and practical use.

The other important part of the LEV Test is a qualitative assessment on the control of potential contaminants by smoke testing. Measurements obtained are compared with the available original Local Exhaust Ventilation specification and the relevant performance criteria given in HS(G)258.

In addition to examining and testing the LEV, Envirocare provides records as specified in HS(G)258 ‘Controlling Airborne Contaminants at Work – A Guide to Local Exhaust Ventilation’ (HSE, 2008). In doing so, the record will provide evidence in fulfilling the requirements of Regulation 9 of COSHH guidance. Our reports will also assist you in improving these control measures where necessary.


Experts In Local Exhaust Ventilation Testing

Envirocare offers a thorough Local Exhaust Ventilation Testing and inspection service including visual inspection, measurement and qualitative assessment which are instrumental in determining whether your LEV system is capable of providing satisfactory control of the hazardous substances as required by COSHH regulations.

Envirocare also provides comprehensive, informative and easy to read reports for Local Exhaust Ventilation Testing and as we are independent of any system provider, we can provide unbiased reports.

Envirocare are UKAS accredited for Dust Monitoring in the workplace to assist you in controlling employee exposure to dust and to offer you peace of mind. We current service a wide range of industries from large to small companies in chemical, woodworking, engineering and printing industries as well as in schools and colleges. This experience allows us to conduct COSHH Local Exhaust Ventilation Testing that are relevant and appropriate to the process operating.

Call us on 01274 738668 or fill out our Envirocare Enquiry Form for any queries regarding Local Exhaust Ventilation Testing or any of our many other accredited Environmental and Occupational Hygiene services.

“We have used the services of Envirocare for a number of years to carry out various types of sampling including annual LEV Extraction and Stack Monitoring Testing to help us to comply with the current COSHH and IPPC regulations.
We can rely on their methods of testing to ensure we are up to date with any changes within the HSE guidance (HSG258). We use their report documentation as evidence to colleagues and auditors to demonstrate that we are complying with regulations and action if any attention is needed to the equipment. Envirocare will also give practical advice on how we can improve the systems and improve any maintenance issues that may need attention.”

Site Engineering Manager, Payne



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