Subpart C applies to which facility type?

• A. LNG
• B. LHG
• C. Both LNG and LHG
• D. Neither

Answer: (B)

Subpart C is written to address facilities that handle liquefied hazardous gases—gases that are toxic, corrosive, or chemically reactive and pose significant hazards even at low concentrations. Because of these specific dangers, the rules in this subpart focus on design, equipment, operations, inspection, and maintenance that mitigate those particular risks. Liquefied natural gas, while dangerous, is primarily a cryogenic flammable hazard rather than a toxic or reactive hazard, so it is governed by different parts or subparts that tailor requirements to its cold-temperature containment and flammability needs. That separation means Subpart C applies to liquefied hazardous gas facilities, not to LNG, and not to both.