How must employers inform employees about the existence of permit-required confined spaces?

Employers must inform employees about the existence of permit-required confined spaces by providing a written permit before entry. This approach ensures that employees are not only aware of the confined spaces but also understand the specific hazards associated with them and the necessary precautions that must be taken. The written permits serve as formal documentation that outlines safety procedures and responsibilities, ensuring compliance with safety regulations such as those from the Occupational Safety and Health Administration (OSHA).

This method enhances communication about potential hazards in a clear and organized way, allowing for proper training and preparation before employees enter these dangerous areas. Relying solely on informal methods such as word of mouth, general announcements, or signage is insufficient, as these methods may lead to misunderstandings or lack of awareness about the specific risks involved in entering permit-required confined spaces.