Liquid nitrogen: What it’s used for and what can go wrong A tank marked Liquid Nitrogen sits outside Foundation Food Group along Memorial Park Drive. Hall County Fire Services and Gainesville Fire were called out to the plant around 10:12 a.m. on Jan. 28, 2021, to a report of burns at the plant where they discovered a large number of employees who had evacuated the building. - photo by Scott Rogers Refrigerants like liquid nitrogen, what leaked Jan. 28 at Gainesville’s Foundation Food Group, killing six, are frequently used in the processing plants found in the Poultry Capital of the World.