(February 15, 2019, 10:27 AM EST) -- WASHINGTON, D.C. — The U.S. Environmental Protection Agency on Feb. 14 released an action plan in which it said it would begin the steps to propose designating perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) as “hazardous substances” as it develops groundwater cleanup recommendations for those chemicals at contaminated sites....