An industry group is urging the Environmental Protection Agency to rewrite its draft risk assessment for acrylonitrile (AN), a key ingredient in plastic, arguing that the current document is biased, fails to take into account several relevant studies and follows a “theme of quantitative ultraconservatism that is not scientifically justified.” The comments come as OSHA -- which has an existing permissible exposure limit for acrylonitrile -- looks at updating numerous PELs. But a worker safety advocate says the acrylonitrile limit is close to the NIOSH recommended exposure limit, and that there
