What must be done with asbestos-containing material (ACM) during maintenance?

Labeling and affixing warning signs to asbestos-containing material (ACM) during maintenance is essential for several reasons. First, proper labeling ensures that workers and anyone who may come into contact with the material are made aware that asbestos is present. This awareness is crucial because asbestos poses serious health risks, including lung disease and cancer, if fibers are inhaled. By clearly marking ACM, you help safeguard personnel from accidental exposure, ensuring that they take the necessary precautions when working in the area.

Additionally, warning signs play an important role in communicating the potential hazards to not only workers but also other individuals who may be near the site, such as maintenance staff, contractors, or visitors. This adherence to safety protocols is a critical component in managing asbestos and protecting public health.

The other options are not appropriate practices: leaving ACM in place without proper identification can lead to accidental exposure, storing it in open areas increases the risk of disturbance or damage, and simply covering it with a tarp does not provide the necessary communication about its presence and hazards.