Final answer:
A hazardous materials release refers to any incident involving a spill or release of a hazardous material.
Step-by-step explanation:
A hazardous materials release refers to any incident involving a spill or release of a hazardous material. This can include incidents such as a chemical spill or leak, a gas leak, or the release of radioactive or flammable materials. It can occur during transportation, in a manufacturing facility, or at a storage or disposal site.