What is the first step for inspectors when suspecting the presence of asbestos?

The first step for inspectors when they suspect the presence of asbestos is conducting a visual assessment. This initial evaluation allows inspectors to identify potential asbestos-containing materials (ACMs) and assess their condition. During this visual assessment, inspectors look for building materials that are known to contain asbestos, such as insulation, floor tiles, ceiling tiles, and ductwork, often considering the construction period of the building, as asbestos was commonly used in materials up until the late 1970s.

By conducting a thorough visual assessment, inspectors can gather critical information about the materials' condition and the likelihood of asbestos fiber release. This step is crucial because it helps inform any further actions that need to be taken, such as sampling and testing materials, rather than making assumptions or jumping directly to hazardous actions like removal.

The importance of this method stands out against the other choices, which focus on actions that should only follow an informed visual review. Immediate removal of suspect materials isn't advisable without confirming the presence of asbestos through proper testing. Documenting the location of materials and alerting building occupants are important processes, but they typically come after the initial visual assessment has been made and potential ACMs identified.