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.