EPA signed proposed rules March 16, 2011, that would establish national emission standards for hazardous air pollutants (NESHAP) from coal- and oil-fired electric utility steam operating units (EGUs) and revised new source performance standards (NSPS) for fossil-fuel-fired EGUs. The proposed standards would establish numeric, technology-based emissions limits on mercury, particulates, hydrogen chloride, sulfur dioxide, and nitrogen oxides. The proposed rule would replace EPA’s Clean Air Mercury Rule, which the D.C. Circuit Court of Appeals struck down in 2008. New Jersey v. EPA, 517 F.3d 574 (D.C. Cir. 2008). According to EPA, the proposed rule will be followed by a final rule in November 2011. EPA will accept comments on the proposed rule for 60 days after it is published in the Federal Register.