In early 2013, the U.S. Environmental Protection Agency (EPA) published national standards governing the emission of hazardous air pollutants (HAP) from industrial, commercial, and institutional boilers. Separate rules were issued for boilers located at major sources (facilities with the potential to emit 10 or more tons of any single HAP and/or 25 or more tons of total HAP per year) and area sources (facilities with the potential to emit less than 10 tons of any single HAP and/or less than 25 tons of total HAP per year). Covering both new and existing boilers, which are divided into 19 subcategories, the rules establish numerical limits for emissions of five pollutants: carbon monoxide (CO), hydrogen chloride (HCI), mercury (Hg), and filterable particulate matter or total selected metals. There are various requirements regarding start-up and shutdown to meet, and most boilers are required to have a tune-up; meanwhile, a one-time energy assessment is required for affected units.
展开▼
