In accordance with these prerequisites, EPA's commitments less than the PFAS Action Plan (USEPA, 2019a), and the method explained in this doc, EPA is proposing monitoring for the unregulated contaminants shown in Exhibit 3 utilizing the specified solutions. EPA has utilized an Assessment Monitoring tier for seventy two contaminants and contaminant teams around the study course of UCMR one by means of UCMR four.