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Which of the following does NOT qualify as an asbestos-containing material (ACM)?

  1. Sprayed-on insulation

  2. Floor tile

  3. Concrete

  4. Pipe insulation

The correct answer is: Concrete

The correct choice for the material that does not qualify as asbestos-containing material (ACM) is concrete. Asbestos-containing materials are defined by the presence of asbestos fibers within them, which can pose health risks when disturbed. Sprayed-on insulation, floor tile, and pipe insulation are all common materials that historically used asbestos for its fireproofing and insulating properties. These materials can contain significant amounts of asbestos, thus categorizing them as ACM. Concrete, on the other hand, is a construction material that does not inherently contain asbestos. While it is possible for some concrete formulations to include asbestos, it is not a standard component of concrete products. Therefore, concrete does not fit the definition of an ACM, making it the correct choice for the question.