Tier 2 produces a semi-quantitative OEB assignment based on secondary sources. Tier 2 involves assigning the OEB on the basis of key findings from prescribed literature sources, including use of data from specific types of studies. It is intended for individuals with intermediate toxicology knowledge. Tier 2 is more quantitative in nature than Tier 1. Individuals performing Tier 2 assessments will need to determine a point of departure by using the instructions that are provided for endpoints to support assigning chemicals into bands A, B, C, D, or E.
Basic instructions to use the Occupational Exposure Banding e-Tool for Tier 2.
- Page last reviewed:July 1, 2019
- Page last updated:July 1, 2019
- Centers for Disease Control and Prevention,
- National Institute for Occupational Safety and Health
- Division of Science Integration