An LEV is a local exhaust ventilation system that extracts airborne contaminants away from a process or operation that would be harmful to the operatives’ health.
Under what circumstances is an LEV necessary?
- If the CoSHH assessment of a work task shows there is potential harm to health to an operative from exposure to a dust, mist, gas, vapor or fumes. HS(G)258 uses information on the Material Safety Data Sheet, along with how the task is carried out and the duration / frequency of it is used to assess the risk from completing the work task.
- Before an LEV is specified, consideration should be given to whether the hazard can be eliminated, enclosed, substituted or reduced
Which regulations apply?
The need to install an LEV system will often be determined after an assessment of exposure to the contaminant concerned has been performed. Such assessments will involve taking samples to indicate personal exposure. After these assessments, if the substance released into the work place atmosphere is deemed “at an unsafe level”, controlled measures should be taken in accordance with COSHH General Code of Practice and HSG258 (Supercedes HSG37 and HSG54).
CoSHH Regulations 2002:
- Regulation 7 requires that the exposure of employees to substances hazardous to health be either prevented or where that is not reasonably practical, adequately controlled.
- Regulation 8 states that there is a duty on the employee to use any LEV provided and to report any defects observed.
- Regulation 9 requires that any control measure taken to comply with Regulation 7 must be maintained in an efficient state, in efficient working order and in good repair and specifies that records shall be kept of the results of the tests, including details of any repairs carried out as a result of the examinations and tests. These records have to be kept for a minimum of 5 years.
- An initial survey is conducted on each LEV system. This process documents all of the relevant information including the specifications for the fans, motors, ducting, hoods and fume cupboards as required by the regulations.
- We then produce a diagrammatic sketch for each LEV indicating the necessary test points. This is used as a permanent reference by the engineer, the company and/or any H&SE audit.
- Examinations are carried out by our trained and experienced engineers using the latest technology to achieve the most accurate results.
- To aid compliance with regulation 8, the test points are distinctly marked, using high visibility labels detailing the individual test point number and the next test due date.
- All the necessary documentation and test results are presented in a clearly defined report, to provide you with an easily referenced audit for safe system compliance.
- Testing of the LEV systems should create little or no disruption to your process as the unit should be in normal operating conditions at the time of testing.