A specific fast-track process applies to persistent, bioaccumulative and toxic substances (PBTs). The statute required that a procedure for this process be set forth in a regulation by June 2017 and the EPA administrator signed this rule on June 22, 2017, for subsequent publication in the Federal Register. ‘High’ means that the chemical may present an unreasonable risk of injury to health or the environment due to the potential hazard and route of exposure, including to susceptible populations ‘low’ means that there is no such unreasonable risk. The EPA must prioritise existing chemicals for assessment and establish a risk-based process to identify ‘high’ and ‘low’ priority substances.
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