Because this type of survey is intrusive and may involve disturbing asbestos-containing materials, the building will usually need to be empty for the survey to take place. How much disturbance, sampling and intrusion is needed for the asbestos survey will depend on the type of survey you are having. This type of survey must locate and identify ACMs, including those hidden within the building fabric, before any structural work begins at the premises or on equipment. It was used extensively in bui...