What standard should a compressed natural gas (CNG) motor vehicle fueling facility comply with?

The appropriate standard for a compressed natural gas (CNG) motor vehicle fueling facility is NFPA 52. This standard specifically addresses the installation and operation of CNG systems for vehicle fueling, ensuring safety and minimizing risks associated with the storage and dispensing of compressed natural gas. Compliance with NFPA 52 is critical for facilities that operate CNG fueling systems, as it provides guidelines on various aspects, including equipment design, installation practices, and operational safety measures.

Other options focus on different aspects of gas and fuel management. NFPA 50 pertains to the bulk storage of liquefied gases, NFPA 51 deals with the use of acetylene, and NFPA 53 addresses chemical process safety. While these standards are important within their specific contexts, they do not apply directly to the particular requirements and safety protocols for CNG motor vehicle fueling facilities as NFPA 52 does. Therefore, NFPA 52 is the correct reference for compliance in this scenario.