The EPA’s January 2013 amendments to its maximum achievable control technology standards for industrial, commercial, and institutional boilers and process heaters (Boiler MACT) was a highly consequential action that prompted both industry and environmental groups to submit 13 petitions asking the Agency to reconsider certain provisions. In a final rule, the Agency has responded to those petitions and issued several revisions.
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According to the EPA, the Boiler MACT affects 14,000 major sources of hazardous air pollutants. All of these will be required to conduct periodic tune-ups and a one-time energy assessment, and 12 percent must meet emissions limits.
The major amendments include clarifying definitions for periods of start-up and shutdown; amending work practice standards; defining clean fuels; and engaging pollution controls.