The Environmental Protection Agency (EPA) is proposing to strengthen and update the Mercury and Air Toxics Standards (MATS) for coal- and oil-fired Electric Utility Steam Generating Units (EGUs). The proposed amendments are the result of EPA’s review of the May 22, 2020 residual risk and technology review of MATS. A public hearing is planned to be held during the comment period. Comments due 60 days following publication in the Federal Register.
SUMMARY: The EPA is proposing to amend the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Coal- and Oil-Fired Electric Utility Steam Generating Units (EGUs), commonly known as the Mercury and Air Toxics Standards (MATS). Specifically, the EPA is proposing to amend the surrogate standard for non-mercury (Hg) metal HAP (filterable particulate matter (fPM)) for existing coal-fired EGUs; the fPM compliance demonstration requirements; the Hg standard for lignite-fired EGUs; and the definition of startup. These proposed amendments are the result of the EPA’s review of the May 22, 2020 residual risk and technology review (RTR) of MATS.
