A Class X manager shall be considered actively supervising if present at the base of operation at least ________ of the reasonably normal hours.

A Class X manager is required to actively supervise operations to ensure safety and compliance with regulations. Being present at the base of operation for at least 50% of the reasonably normal hours signifies a commitment to maintaining oversight and managing the daily activities associated with propane gas operations. This level of presence allows the manager to promptly address any safety concerns, facilitate training, and enforce safety protocols effectively.

In a safety-sensitive environment like propane gas operations, having a manager consistently available to monitor activities helps to foster a culture of safety and compliance. Their role is crucial in setting standards and responding to incidents, which underscores the necessity of maintaining a significant presence during operational hours. The 50% requirement strikes a balance between ensuring adequate supervision without necessitating the manager's continuous presence, allowing them to also engage in other responsibilities, possibly at multiple sites.