Which federal agency establishes Threshold Limit Values (TLVs)?

The correct answer is the American Conference of Governmental and Industrial Hygienists (ACGIH). This organization is responsible for establishing Threshold Limit Values (TLVs), which are guidelines for occupational exposure levels of various chemical substances. TLVs serve as a reference for the safe amount of a substance that workers can be exposed to during a typical workday without adverse health effects.

ACGIH rigorously reviews scientific literature and research to derive these values, which are widely accepted in occupational health and safety practices. Their TLVs are used by industry professionals, safety managers, and health agencies as a standard to help ensure safe working conditions.

The other options may be involved in workplace safety and health, but they do not specifically establish TLVs. For instance, the Environmental Protection Agency (EPA) focuses on environmental health regulations and standards, while the Occupational Safety and Health Administration (OSHA) develops regulations to ensure workplace safety and health but does not set TLVs. Similarly, the National Institute for Occupational Safety and Health (NIOSH) conducts research and makes recommendations for preventing work-related diseases and injuries but does not set TLVs directly.