What is most commonly contained in large, above-ground, horizontal storage tanks?

Large, above-ground, horizontal storage tanks are predominantly used for the storage of flammable or combustible liquids. These tanks are designed to hold significant quantities of liquids such as gasoline, diesel fuel, kerosene, and other petroleum products. The design and construction of these tanks prioritize safety and compliance with regulations regarding the storage of flammable materials to minimize the risk of fire or explosion.

Flammable and combustible liquids are liquid substances that can easily ignite and pose significant hazards during storage, handling, and transportation. The tanks are often equipped with safety features such as spill containment systems, pressure relief valves, and fire suppression systems to address the risks associated with these types of liquids.

While it is true that other options like hazardous waste, solid bulk materials, or chilled liquids may also be stored in various types of tanks or containers, they are less commonly stored in the specific large, above-ground horizontal tanks mentioned in this question. The primary purpose of such tanks is tailored towards the needs of liquid fuel storage and the management of flammable substances.