With much anticipation, on December 21, 2012 the Environmental Protection Agency (EPA) released a suite of air pollution rules regulating hazardous air emissions from combustion sources such as industrial boilers and process heaters. This package of combustion rules includes a revised version of the Industrial Boiler Maximum-Achievable Control Technology standard (Boiler MACT). The agency first finalized the Boiler MACT rule package in March 2011, but on the same day announced it would undertake an administrative reconsideration of the rule to address numerous concerns that had been raised by stakeholders. During the nearly two years it took EPA to reconsider the Boiler MACT rule, the agency collected additional emission information from certain categories of boilers and industrial incinerators which it used to better inform the rule revisions.
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