FRA sponsored a study by Southwest Research Institute to conduct research and testing of a cryogenic storage tank in Liquefied Natural Gas (LNG) service and evaluate its thermal safety performance under fire conditions using analytical methods and fire testing. This report documents the second phase of this research. In Phase I, the team filled the test tank with liquid nitrogen (LN2) in place of LNG and the pressure relief system was evaluated and determined to work properly in the specified test conditions. Based on those results, researchers in Phase II essentially repeated the same test with the tank filled with LNG. The report provides additional detail of the test tank, the flatcar supporting the tank, the development of a safety plan, characterization of the fire exposure source, description of the instrumentation used in the experiment, test results, and detailed data analysis.