Mealey's (August 20, 2021, 1:24 PM EDT) -- WASHINGTON, D.C. — The U.S. Environmental Protection Agency on Aug. 18 revoked all tolerances for the chemical chlorpyrifos, saying that it is unable to conclude that the risk from aggregate exposure to the chemical meets the safety standard for the Food, Drug and Cosmetic Act (FDCA), 21 U.S.C. §§ 301-392....