Certified Occupational Health Nurse Exam 2025 – 400 Free Practice Questions to Pass the Exam

Threshold Limit Values (TLVs) are primarily used to evaluate chemical exposure in the workplace. TLVs are guidelines established by organizations such as the American Conference of Governmental and Industrial Hygienists (ACGIH) to indicate the maximum concentration of a chemical substance to which workers can be exposed without experiencing harmful effects. These values take into account the potential risk of long-term health effects, as well as short-term exposure limits, making them vital for assessing the safety of chemical environments in diverse occupational settings.

Unlike biological exposure, which pertains to pathogen exposure or biological agents, or physical exposure, which may involve factors such as radiation or noise, TLVs specifically focus on the concentration of chemicals and their impact on human health and safety. Emotional exposure, on the other hand, relates to psychological factors in the work environment and is not quantified using TLVs. This specificity to chemical exposure underlines why the association of TLVs is correctly linked to evaluating the level of chemical hazards employees may face in their workplaces.