In recent months, the Agency for Toxic Substances and Disease Registry (ATSDR) and the “minimal risk levels” (MRLs) established by ATSDR have played a direct role in EPA’s efforts to regulate stationary sources under the Clean Air Act. The ATSDR is an advisory agency created by CERCLA in 1980 to help EPA assess health hazards associated with Superfund Sites. ATSDR’s role was expanded by the 1984 RCRA Amendments to assess risks from hazardous substance releases at landfills and surface impoundments. In 1986 SARA further expanded ATSDR’s responsibilities under CERCLA to assess the health impacts of hazardous substance releases.
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