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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.

Tier 2 Criteria      Tier 2 Examples      Tier 2 Resources

Basic instructions to use the Occupational Exposure Banding e-Tool for Tier 2. Illustration of Tier Two