What is the name of the foam application method used for a liquid fuel pool below a tank wall?

The correct method for applying foam to a liquid fuel pool that is located below a tank wall is known as the bank down method. This approach involves applying foam from above the spill area, allowing the foam to cascade down the side of the tank wall onto the fuel pool.

The bank down method is particularly effective because it ensures that the foam directly covers the burning liquid, creating a barrier that prevents oxygen from reaching the fuel and effectively suppressing the fire. This technique is especially useful in situations where the fuel pool's level is lower than the surrounding structure, such as the wall of a tank.

In contrast, other methods like the flooding method involve applying foam over a larger area without specific targeting, which may not adequately contain the fire with the same level of efficiency as the bank down method. The subsurface method, typically used for certain types of extinguishing scenarios, focuses on injecting foam beneath the surface of the liquid but does not specifically address the situation of a fire below a tank wall. The foam blanket method generally refers to maintaining a layer of foam over a surface rather than addressing the specifics of pooling below a tank.

Therefore, when dealing with a liquid fuel pool located below a tank wall, the bank down method is specifically designed for that scenario