Which statement is true regarding posting signs in asbestos work areas?

The statement indicating that signs must be posted at a size of 20" x 30" with the message "asbestos work area, keep out" is correct because it follows established safety regulations that are put in place to protect workers and the general public from the hazards associated with asbestos. The specific dimensions ensure that the signs are large enough to be clearly seen from a distance, which is crucial for warning individuals about the potential dangers they may encounter if they enter the area.

Proper signage is a critical element of safety protocols in asbestos abatement because it signifies to workers and passersby that they are entering a regulated work zone where asbestos is present. This understanding helps to prevent accidental exposure and maintains compliance with health and safety regulations governing asbestos work.

Other options might suggest more relaxed standards or requirements that do not align with industry practices, which can compromise safety. For instance, signs should not only be posted at the entrance but should also be adequately sized to ensure visibility and effectiveness in communicating the hazardous nature of the work area. The need for ongoing visibility underscores the importance of proactive safety measures in environments where hazardous materials are present.