Incompatible materials in storage should be isolated by a partition that is at least how many inches above the stored materials?

When storing incompatible materials, it is crucial to prevent any potential chemical reactions or leaks that could occur if these materials come into contact with one another. The requirement for a partition that is at least 18 inches above the stored materials is based on safety regulations to ensure a sufficient vertical separation. This height serves as a buffer zone, minimizing the risk of interactions that could lead to hazards such as fires, explosions, or toxic emissions.

Using a partition of this height allows for adequate space to contain vapors or spills, providing a safer environment for handling and storing various fuel oils and chemicals. It ensures compliance with safety codes and standards, which are designed to protect both personnel and property from the dangers presented by incompatible substances.