5 Common Reasons a Clearance Inspection Fails

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Dust/Debris 

Dust/debris in the removal area, the area immediately adjacent or in the transit area can be a reason for a clearance inspection failing. This includes dust/debris that is both confirmed or suspected to contain asbestos. These two are not always distinguishable, and so in order for the assessor to be confident the area is visually clear, all dust and debris should be removed. 



Unacceptable Fibre Levels

Unacceptable fibre levels for Class A clearances will trigger a failure. The assessor determines this by undertaking air testing inside the enclosure after removal work has taken place. There could be several reasons for unacceptable fibre levels: for example, the enclosure might be too dusty and require more cleaning, or perhaps the negative air unit isn’t functioning properly, or maybe some non-asbestos material inside the enclosure is releasing fibres. 



Contamination

Contamination of materials in the removal area with asbestos can occur during the removal process. Anything highly absorbent that can’t be easily cleaned, such as glass fibre for example, will likely need to be removed as asbestos waste. 



Unexpected Asbestos 

Unexpected asbestos containing materials might be uncovered during removal. This can be especially problematic if the material is in poor condition. Even if this material is outside the originally planned scope of works, the area needs to be safe for reoccupation in order for a clearance to be given. 



Incomplete Removal

Have you completely removed everything as stated in the asbestos removal control plan? Check the corners of the room, you might have missed something.   

Figure 1.  Unremoved dust/debris in the removal area.