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FIGURE 4-1 THE EXPOSURE ASSESSMENT PROCESS* STEP 1 STEP 2 Characterize Exposure Identify Exposure Setting Pathways •Physical Environment -Chemical Source Release •Potentially Exposed Populations - Exposure Point -Exposure Route STEP 3 Quantify Exposure Exposure Intake Concentrations Variables Pathway- Specific Exposure *Taken from the USEPA's 1juman Health EvaI 2ation MiMlIal (Part A). Interim Final December 1989 a Dfv,3ADn of MdAmn/Nart 89,20,n;