What action should be taken when monitoring a confined space during entry?

Regular monitoring of a confined space during entry is crucial to ensure the safety of personnel working inside. This ongoing assessment allows for the detection of changes in air quality, hazardous conditions, or other environmental factors that could pose risks to workers' health and safety. By maintaining continuous monitoring throughout the duration of work, any adverse conditions can be addressed immediately, allowing for swift evacuation if necessary.

Monitoring is not a one-time action; conditions within a confined space can change over time due to various factors such as the presence of hazardous gases, changes in oxygen levels, or the introduction of potential contaminants from the work being done. Continuous monitoring creates a proactive approach to safety, ensuring that workers are informed of any dangers that may arise, and enabling quick response measures to be enacted before a situation escalates.

The other options do not align with the best practices in confined space safety and could potentially lead to hazardous situations, making regular monitoring an essential part of any confined space work protocol.