Asbestos Services

Asbestos Analytical Work

Essential testing before, during and after asbestos remediation

An area cordoned off due to asbestos in the air.

At IOM Consulting Ltd we provide the following analytical services:

  • Background air testing: Often undertaken prior to asbestos removal/remediation work or as part of regular assessment in areas where asbestos materials are present
  • Leak air testing: Carried out during asbestos removal works to ensure enclosure integrity is maintained and control measures are effective
  • Four Stage Clearance*: To enable an area to be reoccupied following asbestos removal. Required following ASB5 notified work by Licensed asbestos removal contractors
  • Personal monitoring: To assess exposure of employees involved in any kind of work involving asbestos
  • Reassurance air testing: Generally undertaken following some kind of ‘disturbance’ of ACMs e.g. removal of non-licensed products or accidental damage; following minor remediation work (such as encapsulation/protection of ACMs); or following removal of an enclosure after completion of a four stage clearance. In these cases, a visual inspection of the area/material would also be carried out prior to air testing.

*What is an asbestos four stage clearance?

Stage 1: Preliminary check of site condition and job completeness;

Stage 2: A thorough visual inspection inside the enclosure/work area;

Stage 3: Air monitoring;

Stage 4: Final assessment post-enclosure/work area dismantling.

Only once all 4 stages have passed in succession can a Certificate of Reoccupation be issued allowing the area to be returned to normal occupancy.

We are UKAS accredited for all testing listed above and our procedures are in compliance with HSG248 Asbestos: The analysts’ guide for sampling, analysis and clearance procedures.

Control of Asbestos Regulations 2012 Regulation 20 Standards for air testing and site clearance certification.

This regulation requires employers performing their own air testing to do it in a way that meets the criteria as set out in ISO 17025. It also requires employers to make sure that any person they engage to perform asbestos air testing and site clearance is competent and accredited by the appropriate accreditation body.

Conformation with ISO 17025 is demonstrated by obtaining accreditation from a recognised body. The United Kingdom Accreditation Service (UKAS) is currently the sole recognised accreditation body in Great Britain.


Who should appoint the analyst to carry out a four stage clearance?

HSG248 Asbestos: The analysts’ guide for sampling, analysis and clearance procedure (paragraph 1.21)    

Although not a legal requirement, it is desirable that the analyst is employed by the building owner or occupier for site clearance certification. This arrangement avoids any conflict of interest (perceived or real) that may arise should the analyst be employed by the removal contractor. It also enables an independent party to be involved in resolving any problems that arise during the clearance process. In addition, it has a practical advantage in that all results and certificates of reoccupation can also be issued directly to the person who has responsibility for the premises as well as to the contractor.

IOM can also assist with: 

  • Review of Licensed Asbestos Removal Contractor Method Statements/Plans of Work
  • Witnessing of smoke tests to ensure enclosure integrity prior to commencement of asbestos removal work
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