During a confined space entry, how often must the atmosphere be monitored for hazardous conditions?

The atmosphere in a confined space must be monitored continuously to ensure safety during entry. Continuous monitoring allows for real-time detection of hazardous conditions, such as flammable gases, toxic substances, or oxygen levels that fall outside of safe limits. Since conditions in confined spaces can change rapidly and unexpectedly, continuous monitoring is critical to protect the health and safety of individuals working within those environments. This proactive approach helps in prompt identification of any dangerous atmospheric changes, allowing for immediate action to ensure the safety of workers.