Manufacturers are introducing chemicals into commerce at a rate that significantly outpaces the development of authoritative occupational exposure limits. Occupational exposure banding uses available toxicological data to create a range of concentrations or an occupational exposure band (OEB) to support decisions about exposure control strategies. The objective of this session is to examine the proposed National Institute for Occupational safety and Health (NIOSH) approach to derive an occupational exposure band and application of the OEB in emergency response scenarios.