Several organizations publish occupational exposure limits (OELs) including the Occupational Safety and Health Administration's (OSHA) permissible exposure limits (PELs), the American Conference of Governmental Industrial Hygienists (ACGIH) threshold limit values (TLVs), and the National Institute for Occupational Safety and Health (NIOSH) recommended exposure limits (RELs). Only OSHA PELs are legally enforceable.
Review each type of OEL, and reflect on the pros and cons of each. Which type of OEL do you believe would be the most protective for workers? Explain why.