Describe the term "asbestos-containing material" (ACM).

The term "asbestos-containing material" (ACM) specifically refers to materials that contain more than 1% asbestos by weight. This definition is critical within asbestos regulations and practices, especially in demarcating which materials must be handled with special care due to their potential health risks.

Materials that qualify as ACM require adherence to strict guidelines regarding their management, removal, and disposal, to minimize the release of asbestos fibers into the environment, which can pose significant health risks, including asbestosis and mesothelioma. The 1% threshold is a standard used in various regulatory frameworks, including those set forth by the Environmental Protection Agency (EPA) and Occupational Safety and Health Administration (OSHA).

Other options provide broader or different contexts, such as the idea that materials related to asbestos or those only removed from buildings are classified as ACM, which does not align with regulatory definitions and practices. Understanding this precise definition is vital for professionals in the field dealing with asbestos risk assessment and management.