Which hazard significantly affects worker safety in excavations?

Asphyxiation due to lack of oxygen is a significant hazard that affects worker safety in excavations. This danger arises particularly in deep or confined spaces where the presence of soil or other materials can displace air, leading to reduced oxygen levels. Workers operating in such environments need to be aware of the potential for oxygen deficiency, which can lead to serious health risks, including loss of consciousness and even death.

In excavation sites, the risks of asphyxiation can be exacerbated by factors such as the presence of hazardous gases, poor ventilation, and the physical characteristics of the site. Therefore, ensuring adequate oxygen levels, monitoring air quality, and employing proper respiratory protection are critical measures to safeguard workers in these settings.

In contrast, while adequate ventilation from machinery, consistent light sources, and frequent worker rotations can contribute to overall safety, they do not directly address the grave risk of asphyxiation, which remains a priority concern in excavation work.