 These critics called upon the EPA to provide answers to questions about suppression of scientific assessments on chemical pollution of water.Pruitt conceded that his agency should take "concrete action" related to chemicals like PFAS, but testified that he was unaware of any delay in the release of the study.At a May 2018 "leadership summit" on PFOA, PFOS and related chemicals attended by Pruitt, some reporters were barred from attending, including those from "Politico" (which first reported on the release of the emails), CNN, and E&E News (which writes on environmental issues).