The LNG industry's highest priority has always been safety and security, which is reflected in the industry's excellent safety record. LNG is not stored under pressure and it is not explosive. LNG vapors (methane) mixed with air are not explosive in an unconfined environment. If exposed to air, LNG quickly vaporizes back to its gaseous state and, because it is lighter than air, it dissipates quickly. In the unlikely event that an incident occurs, LNG leaves no polluting residue after vaporizing and over water would not mix with water or form slicks that could harm flora or fauna.
In its liquid state, LNG is not explosive. When LNG is heated and becomes a gas, the gas is not explosive if it is unconfined. Natural gas is only flammable within a narrow range of concentrations in the air (5% to 15%). Less air does not contain enough oxygen to sustain a flame, while more air dilutes the gas too much for it to ignite.
The LNG industry provides appropriate security, planning, prevention and risk mitigation in close coordination with local, state, and federal authorities, including the U.S. Coast Guard, the Federal Energy Regulatory Commission, federal and state Departments of Transportation, appropriate emergency response organizations, U.S. Customs and Border Protection and Transportation Security Administration and many others. This stringent oversight and regulation significantly enhances safety and reduces risks.