Air Monitoring
Air sampling for (asbestos) fibres may be undertaken for a variety of reasons. The main types of sampling TDA provide are:
Personal sampling
- To assess suitability of respiratory protective equipment
- To check effectiveness of controls in place
- To assess compliance with relevant exposure limits
Background sampling
To assess fibre concentrations prior to any activity liable to generate asbestos fibres is commenced. Note: this is generally of limited use, as in most cases the background levels are below the limit of quantification, and the fibre count may also be predominantly non-asbestos fibres.
Clearance sampling
As part of a clearance certification procedure to verify an area is suitable for re-occupation.
Reassurance sampling
That may be undertaken to confirm residual airborne fibre levels (e.g. after removal of an enclosure in a building or enclosed area).
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