Revision of MDHS 100

Update on a new draft by the Health and Safety Executive to revise the MDHS 100 (The Methods for the Determination of Hazardous Substances) for asbestos surveys.

*Management Surveys* (formerly type 2 survey)

A *“management”* survey is undertaken to address the risks from asbestos associated with the continued use of the building (ie normal occupancy and activities, and associated maintenance and development). This type of survey is performed to ensure that no one is harmed by the continued presence of asbestos in premises (ie ACMs remain in good condition and that no-one inadvertently disturbs ACMs during maintenance and other work). The purpose of this type of survey is to locate, as far as reasonably practicable, the presence and extent of any suspect ACMs in the building which could be damaged or disturbed during normal occupancy including foreseeable maintenance and installation. All buildings normally require a management survey as part of the on-going arrangements to manage asbestos. Management surveys will often involve minor intrusive work and some disturbance.

*Refurbishment / Demolition Surveys* (formerly type 3 survey)

There are also circumstances where a far more intrusive survey is necessary to establish the full extent and complete presence of asbestos. This type of survey is necessary prior to any refurbishment (including “minor”) or demolition work being carried out. These *“refurbishment/ demolition”* surveys will be much more intrusive and destructive compared with management surveys as their intention is to locate all the ACMs so that they can be removed before the refurbishment or demolition takes place. Refurbishment/demolition surveys are required as necessary when the needs or use of the building changes and the fabric of the building will be disturbed or complex fixed plant (eg large ovens) are to be dismantled.