When it comes to workplace health, the air we breathe often goes unnoticed until there’s a problem. Enter Local Exhaust Ventilation (LEV), a key player in keeping workplaces safe and free from harmful airborne contaminants. But what exactly is LEV and why does it matter so much? Let’s dive in.
What is LEV and why is it important?
Local exhaust ventilation is a system designed to control and remove hazardous substances directly at their source before they have a chance to disperse into the workplace atmosphere. Think of it as a targeted approach to air quality management – like a vacuum cleaner for dangerous dusts, fumes and vapours.
LEV systems are commonly found in industries where airborne contaminants pose significant health risks. For example, manufacturing plants and chemical laboratories. Without LEV, employees are at greater risk of exposure to harmful substances, which can lead to legal repercussions for employers who fail to meet health and safety regulations.
Frequently asked questions about LEV
Understanding LEV isn’t just for occupational health experts – it’s essential knowledge for employers, safety officers and employees alike. Let’s explore some of the most common questions people have about these systems and the implications of maintaining or neglecting them.
How do you know if an LEV hood’s airflow is adequate?
An LEV system is only as good as its airflow. The hood, which is the point where contaminants are captured, needs sufficient suction to draw pollutants away effectively. But how can you tell if the airflow is adequate? The answer lies in regular testing. Professionals use airflow meters and smoke tests to evaluate performance, ensuring that the system meets the required standards. If the airflow is insufficient, the hood may look like it’s working, but it won’t provide the protection workers need.
Do examiners have to put red labels on failed LEV hoods?
A failed LEV system isn’t just a technical issue – it’s a potential health hazard. If an LEV hood fails its examination, Health and Safety Executive (HSE) guidelines recommend that it be clearly marked to warn users. This often takes the form of a red label or similar visual indicator, alerting everyone that the hood must not be used until it’s repaired or replaced. Clear communication is key here; an unmarked, faulty system could lead to accidental use, exposing workers to avoidable risks.
Who is considered a competent person?
Competence is a cornerstone of workplace safety, and when it comes to LEV, the term “competent person” has specific implications. A competent person is someone with the training, knowledge and experience to assess and maintain LEV systems effectively. This might include a combination of formal qualifications and hands-on experience. Without a competent person overseeing LEV operations, it’s impossible to ensure that the system is functioning as intended.
Does HSE require LEV-related qualifications?
While the HSE doesn’t mandate specific LEV qualifications, it does emphasise the need for competence. Training courses, such as those offered by organisations like the British Occupational Hygiene Society (BOHS), can provide the necessary expertise. For employers, investing in properly trained staff or hiring qualified professionals is a crucial step in meeting HSE expectations and avoiding compliance issues.
What should be included in an LEV examination?
LEV systems need more than just a cursory glance to ensure they’re doing their job. A thorough examination includes checking airflow rates, hood capture efficiency, ductwork integrity and the condition of filters and fans. It’s not just about ticking boxes; it’s about ensuring that every component works in harmony to protect workers. Examiners also look for signs of wear and tear, such as blockages or corrosion, which could compromise the system’s performance.
What is on-tool extraction?
On-tool extraction is a type of LEV that integrates directly with the tool generating the contaminant. For example, a sander might have an attached vacuum system to capture dust as it’s created. This approach is particularly effective because it targets pollutants right at the source, reducing the amount that escapes into the air. On-tool extraction is widely used in construction, woodworking and other trades where dust generation is a major concern.
What should a on-tool extraction test consist of?
Testing on-tool extraction involves measuring the system’s ability to capture and contain dust or other contaminants. This typically includes visual inspections, airflow measurements and real-world usage tests to assess performance under working conditions. A good test will confirm that the extraction system meets industry standards and provides adequate protection for workers.
Why regular LEV maintenance is non-negotiable
Neglecting LEV maintenance is like ignoring the warning lights on your car dashboard. Over time, even the best systems can degrade, leading to reduced efficiency and increased health risks. Regular maintenance and inspections, carried out by competent individuals, ensure that the system remains effective and compliant with regulations. LEV can make all the difference in creating a safer workplace. After all, clean air isn’t just a privilege – it’s a necessity.