Local Exhaust Ventilation LEV ventilation A correctly built, maintained, and operated LEV system eliminates airborne pollutants such as dust, mist, gas, vapour, or fumes before humans inhale them and safeguards the health of workers.
Responsibility to control health risks at work
You are required by the Health and Safety at Work to ensure both the workers’ health and safety as well as the safety of others. Risks must be eliminated as much as it is practically possible. Risks must be minimised whenever possible when elimination is not an option.
A local exhaust ventilation system reduces the danger of employees inhaling polluted air by capturing dust, vapours, and gases at their source.
choosing and putting in LEV
Making the proper LEV system choice can be challenging. Its capacity to capture and hold contaminated air may be reduced by poor design, installation, and maintenance. It may also increase workplace concerns including excessive noise or the possibility of vapours or dust catching fire in a ventilation duct. For these reasons, only a certified and competent specialist should design and install an LEV system.
To determine your ventilation needs, speak with an industrial ventilation engineer, occupational hygienist, or LEV supplier.
To determine whether you need a construction permit to instal, speak with your local council.
You might still need to implement other controls, like RPE, because an LEV ventilation system might not be able to completely remove all of the polluted air. To determine whether your employees will require RPE, you should set up exposure monitoring.
You must involve your employees in the decision-making process when choosing LEV and other risk controls.
What to anticipate from your LEV vendor
Ensure the competence of your supplier. Inquire about their experience, training, and membership in the business.
Precision Face Fit Testing
All kinds of tight-fitting masks, including disposable FFPs and half- and full-face masks, can be fit-tested using the Quantitative fit testing method. With the help of a quantitative fit test, face fit can be evaluated objectively and directly with a fit factor.
The Particles Counting method, which is the name given to the TSI Portacount Plus, is the most popular quantitative technique for RPE fit assessment. The Portacount Plus calculates a numerical result which is the percentage of the two ambient particle counts within and outside a facepiece over a specified test period.
Quantitative fit testing can be done in a number of ways, but the most popular is “particle counting” with a device called a TSI Portacount, which is what we use. This compares the number of dust clouds inside the mask to the number of small dust particles in the surrounding air. A plastic sampling tube connects the machine to the mask. The wearer engages in a series of exercises intended to mimic movement seen in the workplace during the test. The device recognises particles entering the mask, and at the conclusion of whether the test results are pass or fail.