Who publishes TLVs?

• A. NIOSH publishes TLVs.
• B. ACGIH publishes TLVs.
• C. OSHA publishes TLVs.
• D. EPA publishes TLVs.

Answer: (B)

TLVs are exposure guidelines produced by a professional organization, not a regulatory agency. The American Conference of Governmental Industrial Hygienists (ACGIH) publishes Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) to provide recommended limits for airborne contaminants and indicators of biological exposure. These TLVs serve as guidelines to help protect worker health and are not legally enforceable unless a government agency adopts them. Other agencies have different kinds of limits: NIOSH issues RELs, OSHA sets legally enforceable PELs, and the EPA uses risk-based values like Reference Doses. So, the organization that publishes TLVs is ACGIH.