Asbestos Air Monitoring and Four-Stage Clearance

Four-stage clearance is the procedure carried out by independent test facilities, following licensed asbestos removal works. A visual inspection must be conducted by an independent analyst to ensure that the area has been cleaned to a satisfactory standard and is suitable for re-occupation.

Clearance asbestos air monitoring is then conducted inside the enclosure to check that airborne fibre levels are below acceptable levels. Once satisfactory results are achieved the analyst will issue a certificate of re-occupation, which will enable people to safely re-enter the area.
SOCOTEC provide a complete inspection and airborne fibre monitoring service including reassurance inspections and air quality monitoring, personal exposure and four-stage clearance testing for certificates of re-occupation following asbestos removal. All work is UKAS accredited (ISO 17025) and carried out in accordance with HSE guidance document 'Asbestos: The analysts guide for sampling, analysis and clearance procedures' (HSG248).
Being entirely independent from any business undertaking asbestos removal works allows SOCOTEC to provide independent impartial advice to our clients. In addition to the asbestos analytical services outlined above we are able to offer full end to end project management services for asbestos removal work. Acting as the client’s technical representative, our services include:

  • Specifications for asbestos removal work
  • Tendering to licensed contractors
  • Site meetings and project management
  • Independent asbestos air monitoring and four stage clearance
  • Certificate of reoccupation
  • Onsite compliance audits
  • Updating of asbestos registers and reports

We are a UKAS accredited inspection body (No. 0148), with UKAS accredited testing laboratories (No. 1089).


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