Name one common type of hazardous material that may be encountered in HAZMAT incidents.

One common type of hazardous material found in HAZMAT incidents is chemicals, including acids and flammable liquids. These substances pose significant risks due to their potential for toxicity, corrosiveness, or flammability. In many industrial and commercial settings, these chemicals are routinely used and stored, making them a frequent concern during emergencies. The presence of acids can lead to severe burns and damage to the environment, while flammable liquids can result in explosive situations if ignited. Understanding the nature of these materials is critical for incident commanders, as they must implement appropriate safety measures, containment strategies, and emergency responses to protect human health and the environment.

The other options, while they may pose some risks under specific circumstances, do not generally fall into the category of hazardous materials as strictly as chemicals like acids and flammable liquids do.