Which of the following is NOT part of a gas maintenance program established by CGA standards?

The option pertaining to "Gas refilling procedures" is not part of a gas maintenance program as outlined by CGA standards. A gas maintenance program primarily focuses on ensuring the safety and operational efficiency of gas systems. It typically includes routine inspections to monitor systems for general condition, leak testing to identify and rectify potential leaks that pose safety risks, and storage environment monitoring to ensure that gas is stored safely and in accordance with regulations.

Gas refilling procedures, while important for the operational aspect of gas management, do not directly relate to the maintenance of existing gas systems or equipment. Instead, they are more concerned with the logistics of managing gas supplies rather than the maintenance of safety and performance standards. Thus, this makes gas refilling procedures separate from the core components of a maintenance program that prioritizes ongoing safety checks and maintenance activities within the framework established by the CGA standards.