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RR624 - Further measurements of fibre concentrations in CLASP construction buildings

In late July 2006, after asbestos contractors had carried out asbestos removal work at a school, the on-site laboratory failed to obtain levels of asbestos fibre in air below 'clearance levels' when, as part of deliberate disturbance, the metal casing around the steel support columns were struck a number of times with the fist or other similar disturbance took place (sitting on and flexing the windowsills). The measured fibre concentrations inside the enclosure suggested a significant release of airborne fibres could take place from some columns. This information was reported to HSE in mid-September and an assessment of the cause, the extent of the release and the effectiveness of remediation were undertaken by HSE with substantial support and co-operation from some local education authorities and HSL. Initial advice was released to schools by HSE before the half-term holiday and a working group was set up by HSE to further assess the problem and to produce further advice from the issues arising.

This report and the work it describes were funded by the Health and Safety Executive (HSE). Its contents, including any opinions and/or conclusions expressed, are those of the author alone and do not necessarily reflect HSE policy.

Visit the RR624 report (PDF) [12]

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CLASP
Consortium of Local Authorities Special Programme

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Updated 2021-11-12