Transcription of Improved Methods for Clearance Testing and Visual ...
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Broad Lane, Sheffield, S3 7 HQTelephone:+44 (0)114 289 2000 Facsimile:+44 (0)114 289 2500 HEALTH AND SAFETY LABORATORYAn agency of the Health and Safety Executive Crown copyright 2001 Improved Methods for Clearance Testing andVisual Assessment of asbestos Measurement GroupMr Peter R Stacey MRSC CChem and Dr G BurdettDr G BurdettProject Leader:SummaryObjectives1. To further develop and define a standardised method for Visual Clearance and for disturbance (oraggressive) sampling inside the enclosure and after the site has been To research and test a surface sampling method (by PCM and TEM) to collect surface dust as ameasure of site cleanliness after a removal To investigate the current standard of Visual Clearance being carried out after asbestos removaland to document findings to inform and provide future guidance and To assess any residual levels of asbestos remaining after the contractor has left by carrying outdisturbance sampling before reoccupation and/or surface To prepare a draft MDHS on Clearance sampling and Testing and publish inv
Experimental observations on disturbance / resuspension of surface dusts and asbestos fibres 14. A survey identified that the most common method of disturbing dust in the enclosures
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