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1 Introduction <br />Exponent conducted a Quantitative Risk Assessment (QRA) for movement of liquefied natural <br />gas (LNG) in =ISO tank containers by rail on the Florida East Coast Railway (FECR). <br />The objective of the study was to determine the level of risk associated with <br />the shipping of the LNG ISO containers along three potential routes in Florida. The analysis <br />incorporated aspects of prior LNG -related rail transportation risk analyses and hazard <br />identification studies by FECR The QRA included typical accidental release scenarios that may <br />lead to a loss of containment from LNG ISO containers including consideration of ISO <br />container Lift On/Lift Off (Le. lifting) at intermodal facilities. <br />The Federal Rail Administration (FRA) provided the following requirements for risk analysis of <br />LNG shipping by rail, which were addressed through this study:3 <br />A detailed risk analysis of the proposed operation along with appropriate mitigating <br />measures. At a minimum, this risk analysis must include: <br />a. Risks to the public and railroad workers from the proposed transportation of LNG, <br />considering volumes transported, routes, operations on main lines, passenger rail <br />operations on the proposed transportation lines, yards, Lift On and Lift Off areas, <br />types of trains used, and any other relevant risk factors. <br />b. Analysis of the specific structural characteristics (e.g., susceptibility, strength, <br />ability to withstand exposure to heat) of the portable tanks proposed to be used, the <br />number of tanks in a train, train speed, and position in train. <br />c. Analysis of the thermophysical properties of LNG and its vapor, and expected <br />multifaceted behavior of released LNG (fires, confinement -caused explosions, <br />vapor fires, unconfined vapor cloud explosions, etc.) and the magnitudes of the <br />different types of hazards presented by these properties. <br />d. Considerations of the population density, critical infrastructures, and sensitive <br />assets (e.g., schools, churches, playgrounds, sports arenas, elderly care/nursing <br />homes, Emergency Medical Services, police stations, hospitals, power stations) <br />along the routes proposed. <br />e. Assessment of both societal risks and individual risk to persons in the vicinity of <br />the transportation routes and who may be adversely affected by an accident or <br />incident involving a train transporting LNG. <br />f. A quantitative comparison of the risks of LNG transportation in portable tanks to <br />the risks from other flammable hazardous materials shipped on rail in portable tanks <br />(using the volume of shipments and routes proposed for LNG shipments). <br />3 Guidance for Preparing an Application under Title 49 Code of Federal Regulations Section 174.63 for Approval <br />by the Federal Railroad Administration to Transport Liquefied Natural Cas by Rail in Portable Tanks. <br />1308194.001 - 5691 1 <br />