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Statement of Need: As a result of the vacatur of the Industrial Boiler MACT, the Agency will develop another rulemaking under CAA section 112 which will reduce hazardous air pollutant (HAP) emissions from this source category. Recent court decisions on other CAA section 112 rules will be considered in developing this regulation.

Summary of the Legal Basis: Clean Air Act, section 112.

Alternatives: Not yet determined.

Anticipated Costs and Benefits: EPA estimates the total national capital cost for the final rule to be approximately $9.5 billion in the year 2013, with a total national annual cost of $2.9 billion in the year 2013. The annual cost, which considers fuel savings, includes control device operation and maintenance as well as monitoring, recordkeeping, reporting, and performance testing. EPA estimates that implementation of the rulemaking, as proposed, would reduce nationwide emissions from major source boilers and process heaters by: 15,000 pounds per year of mercury, 3,200 tpy of non-mercury metals, 37,000 tpy of HCl, 50,000 tpy of PM, 340,000 tpy of SO2, 722 grams per year of dioxin and 1,800 tpy of volatile organic compounds. These emissions reductions would lead to the following annual health benefits. In 2013, this rule will protect public health by avoiding 1,900 to 4,800 premature deaths, 1,300 cases of chronic bronchitis, 3,000 nonfatal heart attacks, 3,200 hospital and emergency room visits, 3,000 cases of acute bronchitis, 250,000 days when people miss work, 33,000 cases of aggravated asthma, and 1,500,000 acute respiratory symptoms. The monetized value of the benefits ranges from $17 billion to $41 billion in 2013--outweighing the costs by at least $14 billion.

Risks: Not yet determined.