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.
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.