A Control of Substances Hazardous to Health (COSHH) Local Exhaust Ventilation (LEV) test is a critical procedure in ensuring the safety of workers and others who may be exposed to hazardous substances in the workplace. The test is carried out to ensure that LEV systems are operating correctly and effectively, and that they are adequately controlling the release of harmful substances into the air.
The purpose of an LEV system is to capture and control harmful substances at the source, before they can escape into the workplace atmosphere. This is achieved by using a combination of hoods, ducts, and filters to extract and remove the hazardous substances. Testing is both and essential and legal requirement to ensure that the system is working correctly, and that the substances are being effectively controlled.
During an LEV test, a qualified engineer will carry out a series of measurements and checks to assess the performance of the LEV system.
The test will usually involve the following steps:
- Visual Inspection: The engineer will carry out a visual inspection of the LEV system to check for any damage, leaks or other faults.
- Airflow Measurement: The engineer will measure the airflow within the ducting and at the hood of the LEV system to ensure that the correct velocity is being maintained.
- Capture Velocity Test: The engineer will carry out a capture velocity test to ensure that the LEV system is capturing the hazardous substance effectively at the source.
- Face Velocity Test: The engineer will carry out a face velocity test to ensure that the velocity of air at the face of the hood is correct, and that there is no escape of hazardous substance into the work area.
- Static Pressure Measurement: The engineer will measure the static pressure within the LEV system to ensure that the ducting is not blocked or restricted in any way.
- Filter Efficiency Test: The engineer will test the efficiency of the filters within the LEV system to ensure that they are adequately removing the hazardous substance.
- Noise Level Test: The engineer will measure the noise level of the LEV system to ensure that it is not creating excessive noise levels that could be harmful to workers.
Once the LEV test has been completed, the engineer will provide a report detailing the findings of the test. This report will indicate whether the LEV system is working correctly, and whether any repairs or maintenance work is required to ensure its continued effectiveness. If the LEV system is found to be faulty or not operating correctly, steps will be taken to rectify the problem before workers are exposed to any hazardous substances.
In conclusion, an LEV test is a crucial part of ensuring the safety of workers in the workplace, particularly those who may be exposed to hazardous substances. By carrying out regular LEV tests, businesses can ensure that their LEV systems are working correctly and effectively, protecting the health and wellbeing of their employees.
