Despite GOP Calls, EPA Delays IRIS Handbook Amid Fight Over TSCA Method

Despite calls from GOP lawmakers and the National Academy of Sciences (NAS), EPA appears to have buried the handbook describing how its Integrated Risk Information System (IRIS) program conducts its risk analyses as officials in the research and toxics offices battle over a key assessment method and a system for characterizing non-cancer risks. An April 2019 version of the handbook, obtained exclusively by Inside EPA , describes the IRIS program’s approach to conducting its assessments, including its method for conducting...