After the Great Seattle Fire of 1889, asbestos became a popular material used in a number of reconstructed buildings because of its anti-flammable properties. Although an asbestos survey may sound like a straightforward and simple procedure, asbestos-containing material can be exposed or concealed behind suspended ceilings, within elevator shafts, and inside gypsum wallboard assemblies. The Pioneer Square buildings surveyed by SoundEarth Strategies were no exception; we found asbestos-containing materials in areas that were not readily accessible, including all of the locations listed above, as well as floor felt that was located on every floor of a five-story building-buried beneath four layers of more recently installed flooring. This experience is a valuable reminder of why conducting a comprehensive asbestos survey prior to building demolition or a significant remodel is critical if you want to avoid escalating costs associated with unexpected abatement change orders and construction delays.