Which of the following best describes chemical exposure monitoring?

Chemical exposure monitoring is best described as tracking levels of chemical substances to assess exposure risks. This process involves measuring the concentration of chemicals in various environments, such as the workplace, to determine whether they are present at levels that may pose a risk to human health or the environment. By conducting regular monitoring, organizations can identify potential hazards, assess the effectiveness of safety measures, and ensure compliance with health regulations.

In contrast, measuring the efficacy of antidotes pertains to responses to poisoning incidents rather than ongoing exposure assessments. Monitoring environmental changes focuses on broader ecological factors rather than specific chemical exposures. Evaluating the effectiveness of workplace safety programs involves assessing the implementation of safety measures, which is distinct from direct monitoring of chemical exposure levels. Therefore, option B correctly encapsulates the essence of chemical exposure monitoring.