Local Exhaust Ventilation (LEV) Assessment

LEV stands for Local Exhaust Ventilation, which is a system designed to control airborne contaminants at their source, preventing their release into the workplace air. LEV testing involves assessing the effectiveness of these ventilation systems to ensure they are adequately controlling exposure to harmful substances, and is a requirement of the COSHH Regulations.

Overall, LEV testing is essential for ensuring the health and safety of workers by effectively controlling exposure to hazardous substances in the workplace environment. It helps employers comply with regulations and standards while also protecting the well-being of employees.

Here’s what LEV testing typically involves:

• Initial Examination: A thorough examination of the LEV system is conducted to ensure it is properly installed and maintained. This includes checking the integrity of ductwork, hoods, filters, and any other components.
• Thorough Examination and Testing : A detailed examination and testing of the entire LEV system are conducted to ensure compliance with regulations and standards. This includes checking for leaks, blockages, and other potential issues that could affect performance. This must be carried out every 14 months.
• Regular Monitoring and Maintenance: LEV systems should be regularly monitored and maintained to ensure they continue to operate effectively over time. This may involve periodic performance testing, visual inspections, filter replacements, and other maintenance tasks.

Exposure to harmful substances, elevated noise levels and  prolonged use of vibration tools  can cause serious ill-health over the longer term.   If appropriate controls are not being used then employees will be at risk of serious illness such as cancer, asthma, skin diseases , hand-arm-vibration syndrome and deafness.

Occupational Hygiene is concerned with ‘worker health protection’. It is often described as the recognition, evaluation and control of  exposure to workplace hazards. These include agents such as may include chemicals, dust, fumes, noise, radiation, vibration and extreme temperatures. chemical, physical and biological agents arising from workplace activity.  The presence of these agents may affect the health and well-being of employees.

The Duty Holder is required by law to protect its employees and others from harm.  The minimum you must do is:

1.Identify what could cause injury or illness (hazards)

2.Decide how likely it is that someone could be harmed and how seriously ( the risk)

3.Take action to eliminate the hazard, or if this isn’t possible, control the risk.

This chart highlights the possible health effects associated with different types of contaminants found in the workplace.

The law requires employers to adequately control exposure to substances in the workplace that cause ill health. This is the Control of Substances Hazardous to Health Regulations 2002 (COSHH). In addition,  organisations need to work within the legal limits for the amount of substances that can be present in the workplace air.  There are also regulations for the control of: Noise , Vibration and Local Exhaust Ventilation. You can view a range of HSE guidance relating to Occupational Hygiene at   https://www.hse.gov.uk/pubns/books/index-legal-ref.htm

BOHS  is a membership organisation that promotes  Occupational Hygiene as the science-based discipline for identifying, assessing and controlling exposure to harmful substances in the workplace.  It is the only Occupational Hygiene organisation to be awarded a Royal Charter in recognition of its ‘ unique and pre-eminent role as the leading authority in occupational disease prevention’.  BOHS is also a UK based examining board for occupational hygiene qualifications