Where must CNG compression, storage, and dispensing be conducted?

CNG compression, storage, and dispensing should primarily be conducted outdoors due to safety considerations. The handling of compressed natural gas involves potential hazards, such as leaks resulting in the risk of fire or explosion. Outdoor locations provide better ventilation, which is crucial in minimizing the accumulation of gas in case of a leak.

Additionally, outdoor setups can include safety measures like proper distance from nearby structures and sufficient space for emergency access. This helps ensure that any released gas can dissipate quickly into the atmosphere rather than accumulating in an enclosed space where it could pose a greater danger.

While secure buildings or designated zones may be required for certain aspects of storage and operations, the primary concern in the context of safety is the need for ventilation and the reduction of risk associated with potential accidents. Hence, outdoor locations are preferred for these activities.