The Office of Pipeline Safety (OPS) is issuing this advisory to owners and operators of gas distribution, gas transmission, and hazardous liquid pipeline systems, and liquefied natural gas (LNG) facilities. Owners and operators should ensure that telephonic reports of incidents to the National Response Center (NRC) are both prompt and accurate and fully communicate the estimated extent of the damages. Additional reports should be made if there is a significant change in an estimate of the size of the gas or liquid release, the extent of the damage, or the number of deaths or injuries.