This explains how to apply an Action to an Assessment.  The example uses a TMDL Action, and applies it so that the Assessment Unit and Parameter combination calculates as EPA IR Category 4a.  The steps for applying other types of Actions are the same, but the EPA IR Category result may be different. 

• Attains- How to Apply TMDL Action to Assessments (PDF)(6 pp, 560 K, 09/19/2018)