Cave-ins are considered the most dangerous trench and excavation hazard. In addition, other potentially fatal hazards also exist in excavations, such as asphyxiation due to lack of oxygen in a confined space, inhalation of toxic fumes, drowning, falls, water accumulation, etc. The OSHA standards intend to protect workers in trenches and excavations. This course gives you a basic understanding of how to work safely in excavations and what important points are required to consider when working in an excavation.