Where should warning signs be posted?

Warning signs should be posted on the building, at all entrances, and on the 20 ft perimeter fencing/barrier because this placement ensures maximum visibility and awareness of potential hazards for anyone approaching or entering the area. Properly located warning signs communicate critical safety information effectively to both workers and the general public, helping to prevent accidental exposure to harmful substances or conditions.

By displaying warnings at every entrance and along the perimeter, you create clear boundaries that inform individuals about the presence of restricted areas and the associated risks. This approach fosters a culture of safety and compliance, ensuring that everyone is aware of the safety protocols before entering the vicinity of hazardous activities.

Other options would not provide the same level of awareness and protection, as limiting signs to just one location or only inside the work area could lead to gaps in communication and increased risk of accidents.