Asbestos Air Monitoring
Air monitoring verifies that asbestos fibres are not being released during removal works, enclosure operations, or maintenance activities. Our BOHS P403/P404 qualified analysts provide personal monitoring, leak testing, background sampling, and reassurance monitoring throughout your project.
What Is Asbestos Air Monitoring?
Asbestos air monitoring involves collecting air samples and analysing them for airborne asbestos fibres using phase contrast microscopy (PCM), the standard method for fibre counting in the UK. Monitoring is conducted throughout asbestos removal projects to verify that enclosures are effective, that removal operations are not releasing fibres, and that worker exposure remains within safe limits. Air monitoring provides ongoing assurance during works, complementing the formal 4 stage clearance process conducted at project completion.
When Is Air Monitoring Required?
- During licensed asbestos removal works (statutory requirement)
- Before, during, and after enclosure work
- For four-stage clearance certification
- As reassurance monitoring during building occupation
- Following suspected asbestos disturbance incidents
- To establish background fibre levels before works commence
- For leak testing of removal enclosures
Who Needs Air Monitoring?
- Licensed asbestos removal contractors
- Clients overseeing asbestos removal projects
- Building managers requiring reassurance testing
- Employers investigating suspected exposure incidents
- Demolition contractors during strip-out works
- Healthcare and education premises during refurbishment
What You Receive
- Personal and static air monitoring throughout works
- Background, leak, and reassurance test results
- Rapid turnaround results for informed decision-making
- Analyst site attendance notes and observations
- Analysis by UKAS-accredited analytical companies
- Comprehensive monitoring summary report
- Documentation for health and safety records
Types of Air Monitoring
Background Monitoring
Samples collected before works commence to establish baseline fibre levels. Essential for comparison during and after removal operations.
Leak Testing
Monitoring outside enclosures during removal to detect any fibre leakage. Immediate results enable rapid response if issues are identified.
Personal Monitoring
Samplers worn by workers to assess individual exposure levels. Required for compliance with workplace exposure limits.
Reassurance Monitoring
Post-works or periodic sampling to verify ongoing fibre levels remain safe. Provides documented assurance for building occupants.
Frequently Asked Questions
What qualifications do your analysts hold?
All our analysts hold BOHS P403 (Asbestos Fibre Counting) and P404 (Air Sampling and Clearance Testing) qualifications. We are members of BOHS (British Occupational Hygiene Society).
How quickly can you attend site?
We aim to schedule monitoring within 24-48 hours. For ongoing removal projects, we provide dedicated analyst attendance aligned with your project programme.
What is the clearance level for reoccupation?
The clearance indicator level is 0.01 fibres per millilitre (f/ml) of air. If this level is achieved, the area is considered safe for reoccupation.
Do you provide monitoring for non-licensed works?
Yes. While not always a statutory requirement, we recommend reassurance monitoring for non-licensed removal works to demonstrate due diligence and protect building occupants.
Can you provide continuous site attendance?
Yes. For larger removal projects, we provide dedicated analysts for continuous or programmed attendance throughout the project duration.
What happens if clearance testing fails?
If the clearance level is not achieved, the removal contractor must conduct additional cleaning. We re-test until the clearance level is met before issuing the certificate.
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Asbestos Air Monitoring Across the UK
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