Posted By Martin A Stear Steven I'm not sure I can give you an easy answer. Many decisions about disturbed asbestos are taken in haste and based on panic. There's a couple of things to realise. Damaged asbestos is only a risk if disturbed and a small amount of debris that is discovered is extremely unlikely to have presented any meaningful risk even if in an occupied area. HSG 227 (I wrote it) asks you to look for damaged and deteriorated asbestos as there is the greater potential for disturbance not because there's an immediate risk to health. These are just ACMs that should be dealt with first before they become a problem. If disturbed, the exposed individual will (typically) have had a small one-off exposure which has very very slightly increased their risk (but you still have more chance of being hit by lightning). The ones at more risk are the tradesmen as they are more likely to get repeat one-off exposures thus each time moving their risk up a little bit more. In most cases, I doubt HSE would expect discovered debris to be reported unless it resulted from tradesmen unknowlingly smashing thru ACMs and exposing themselves and others. It needs cleaning up, using an approach commensurate with the amount found and the risk of spread during clean up. Providing the clean up is done properly there should be no more disturbance. Air sampling is usually no more than reassurance. But I've seen major clean ups when 1 contaminated sample was found out 30 taken or one panel was accidently damaged. Careful handling is needed to stop immediate and long term concerns about health. Email me off group if you want to discuss further. Thanks Martin