MACT for Biomass Boilers—Déjà Vu?
Chad Darby and Danielle Lenzini
Nov 5, 2010
On April 29, the U.S. EPA issued the proposed National Emission Standards for Hazardous Air Pollutants for Major Sources: Industrial, Commercial and Institutional Boilers and Process Heaters, 40 CFR Subpart DDDDD, including requirements for both new and existing sources. This rule is often referred to as Boiler MACT. The proposed rule replaces EPA’s original 2004 rule, which was vacated by the U.S. Court of Appeals for the District of Columbia Circuit. In the original rule, there were requirements for single categories of new and existing biomass boilers. In the latest proposed rule, new and existing biomass boilers are each broken into four subcategories, which are based on boiler type: stoker, fluidized bed, suspension burner/Dutch oven and fuel cell. Please see attached PDF.