Obligations for 4-stage clearance:

  • Analyst to be independent of the removal contractor, employ the services of a UKAS accredited testing body, in accordance with ISO 17025
  • Employ qualified and experienced personnel to carry out the work
  • The multi-stage certification process is set up to allow the inspection and assessment to be undertaken in a structured, systematic and consistent manner

As set out in HSG 248 Asbestos: The analysts’ guide for sampling, analysis and clearance procedures:

  • Stage 1: Preliminary check of site condition
  • Stage 2: Thorough visual inspection inside the enclosure area
  • Stage 3: Air monitoring
  • Stage 4: Final assessment post-enclosure area dismantling

Only when all of the stages have been completed satisfactorily, the Certificate of Reoccupation can be issued.