Under what condition must an excavation be inspected?

The correct response highlights the importance of regular safety checks in excavation sites, particularly when there is a change in the size, location, or placement of the spoil pile. This is crucial because any alterations in these factors can significantly affect the stability of the excavation and the risks associated with it.

For instance, if the spoil pile is moved closer to the edge of the excavation, it can increase the likelihood of a cave-in or destabilization of the surrounding soil, thus posing a serious hazard to workers. Continuous evaluation is critical to ensure safety measures are in place and that any changes to the excavation site are effectively managed.

Regular inspections following changes in the site not only comply with safety regulations but also protect the health and safety of workers by identifying potential hazards before they lead to accidents.