This lesson covers when a manhole, ditch or trench can change from an enclosed space into a confined space, the significance of appropriate ventilation to prevent or clear unsafe atmospheres, and the safety practices needed to work in tight spaces.
Objectives:
- Identify the similarities and differences between enclosed and confined space.
- Identify safe practices for using rescue equipment, evaluating potential hazards, removing covers on vaults, hazardous atmospheres, and the role of attendants at enclosed spaces.
- Identify appropriate practices to be used to maintain a safe atmosphere in an enclosed space.
