This is Part Nine of a 13-part series of modules on HAZWOPER designed to provide the annual refresher training as required by OSHA for all employees affected by this regulation. Part Nine covers confined spaces. Many work environments contain spaces that are considered confined because their shape and size make conditions difficult for employees who must enter, work in, and exit them. There are many instances where employees who work in confined spaces face increased risk of exposure to serious hazards that could result in serious injury or death. For this reason, special procedures must be followed when working in confined spaces and they are reviewed in this module.