EPA Science Chief Pushes Plan For Risk Ranges Amid Mixed Responses

EPA science chief George Gray is vowing to quickly implement his plan to overhaul agency chemical toxicity estimates by creating ranges of acceptable values to reflect what is not known about regulated compounds, even as some members of the National Academy of Sciences (NAS) and EPA sources are suggesting a phased approach. At issue is Gray's plan to implement a major shift in the agency's regulatory decision-making framework by presenting ranges of values on how toxic a chemical is rather...