The exposure log is used to track what information?

The exposure log is an essential tool in hazardous materials response and management, specifically designed to document and monitor the duration of exposure individuals have to specific hazardous substances during their operations. This is crucial for both health and safety reasons, as prolonged exposure to certain chemicals can lead to adverse health effects.

By maintaining an accurate record of how long someone was exposed to a chemical, organizations can assess risk levels, implement necessary health surveillance, and provide adequate medical evaluations if required. This information is vital, especially for regulatory compliance and ensuring the safety of all personnel involved in hazardous materials incidents.

While the other options may represent important aspects of hazardous material operations—such as the training duration of hazmat personnel, the history of equipment, or time spent on-site—they do not capture the specific purpose of the exposure log. The log is solely focused on tracking chemical exposure, making the correct answer particularly relevant to the health and safety protocols for those working in hazardous situations.