EPA Defends Draft RDX Cancer Risk Assessment In Peer Review IRIS Draft

摘要

EPA's latest draft assessment of human health risks from royal demolition explosive (RDX) defends its conclusions of RDX's cancer risks from criticisms by a retired National Toxicology Program (NTP) scientist that it understated cancer risk, and continues its defense of competing Defense Department (DOD) claims that the agency overstated risk. The agency on Sept. 23 released its second public draft of the RDX Integrated Risk Information System (IRIS) assessment, reiterating the quantitative risk estimates from the first draft released last March for public comment. In that draft, EPA proposed a reference dose, or the greatest amount of RDX it anticipated could be ingested daily for a lifetime without adverse effect, of 0.003 milligrams per kilogram bodyweight per day (mg/kg-day).