Which method is most effective at reducing the risk of exposure?

Eliminating the hazard is recognized as the most effective method for reducing the risk of exposure in any workplace, including construction. This approach directly addresses the root cause of the risk, removing the potential for injury or illness altogether. When a hazard is eliminated, there is no longer a possibility for workers to be exposed to it, which significantly enhances overall safety.

In contrast, providing personal protective equipment (PPE) serves as a secondary measure, offering a level of protection to workers but not entirely removing the hazard itself. Similarly, staff training is important for educating workers on risks and safe practices, but it primarily relies on individuals to remember and apply what they've learned. Administrative protocols, such as safety policies and procedures, are also crucial, but like training, they do not eliminate hazards; they instead establish guidelines for managing risks.

Overall, while all the other methods play important roles in a comprehensive safety program, eliminating the hazard stands as the most proactive approach to ensuring a safe working environment.