On November 17, 2016, the U.S. Environmental Protection Agency (EPA) released documents to the federal docket regarding food-use tolerance revocations of chlorpyrifos. This proposed action follows a long review of chlorpyrifos that has included three separate Scientific Advisory Panels (SAPs), the first two held in 2008 and 2012 and the most recent this past April (see transcript). All three SAPs came to the same conclusion, questioning EPA’s shift to the use of certain epidemiological study outcomes rather than toxicological data in human health risk assessments. In particular, the SAPs have cautioned EPA against using the study outcomes from the Columbia Center for Children’s Environmental Health (CCCEH). Read more.