Which of the following best describes "toxic exposure history"?

An individual's record of past exposures to hazardous substances best describes "toxic exposure history." This term specifically refers to the detailed account of what hazardous materials a person has been exposed to over time, including the amounts and durations of those exposures. This information is critical for understanding potential health risks and for conducting health assessments, as it allows healthcare providers and toxicologists to evaluate how past exposures may correlate with current health issues or risks.

In contrast, the other options present different but related concepts. A comprehensive list of all chemicals used within an organization focuses on the inventory of substances rather than an individual's specific exposure. A survey of employee health outcomes involves assessing the health effects faced by workers, which may use toxic exposure history as a component but does not capture the individual exposure narrative itself. Lastly, an analysis of environmental impacts from chemical usage is concerned with broader ecological effects rather than individual toxic exposures, which distinguishes it further from the defined term.