What classification is most likely to include materials that are easily combustible?

The classification that most likely includes materials that are easily combustible is High Hazard Locations. This designation typically refers to areas where there is a significant presence of flammable materials that can ignite and burn rapidly. In such locations, the risk of fire is heightened due to the combustible nature of the materials present, which can include flammable liquids, gases, or solids that readily catch fire when exposed to heat or flames.

In contrast, Light (Low) Hazard Locations and Extra Light Hazard Locations are characterized by materials that present a lower risk of ignition. Ordinary (Moderate) Hazard Locations contain materials that may have some flammability but are generally less volatile compared to those found in High Hazard Locations. Thus, the High Hazard classification is specifically intended for environments where the potential for combustion and fire spread is significantly higher, making it crucial for firefighters to understand these distinctions to effectively manage risks in different scenarios.