FACT SHEET

RECONSIDERATION OF FINAL AIR TOXICS STANDARDS
FOR INDUSTRIAL, COMMERCIAL, AND INSTITUTIONAL AREA SOURCE BOILERS

ACTION

•	On August 23, 2016, the U.S. Environmental Protection Agency (EPA) issued a notice
announcing final decisions on the five specific issues for which reconsideration was granted for
the agency's 2013 final amendments to its standards limiting hazardous air pollutant emissions
from industrial, commercial, and institutional area source boilers.

•	EPA is announcing decisions on the following five reconsideration issues:

o establishment of a subcategory and separate requirements for limited-use boilers;
o an alternative particulate matter (PM) standard for new oil-fired boilers that combust
low-sulfur oil;

o establishment of a provision that eliminates further performance testing for PM for

certain boilers based on their initial compliance test;
o establishment of a provision that eliminates further fuel sampling for mercury for

certain coal-fired boilers based on their initial compliance demonstration; and
o definitions of startup and shutdown periods.

•	EPA is retaining the subcategory and separate requirements for limited-use boilers, consistent
with the February 2013 final rule.

•	EPA is amending three provisions, consistent with the alternatives for which comment was
solicited in the January 2015 proposal, as follows:

o an alternative PM standard for new oil-fired boilers that combust ultra-low-sulfur liquid
fuel in place of the alternative PM standard for new oil-fired boilers that combust low-
sulfur oil;

o a provision that requires further performance testing for PM every 5 years for certain
boilers based on their initial compliance test in place of the provision eliminating further
performance testing for such boilers; and
o a provision that requires further fuel sampling for mercury every 12 months for certain
coal-fired boilers based on their initial compliance demonstration in place of the
provision eliminating further fuel sampling for mercury for such boilers.

•	EPA is also making minor changes to the proposed definitions of startup and shutdown based
on comments received.

•	This final action also includes a limited number of technical corrections and clarifications on the
rule that will clarify and improve the implementation of the February 2013 final Area Source
Boilers Rule.

•	This action does not change the coverage of the final rule, nor does it substantially affect the

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estimated emission reductions, costs or benefits of the rule, or change the compliance
deadlines of March 21, 2014, for existing sources and upon startup for new sources. These rule
revisions address continuous compliance requirements applicable in the future.

BACKGROUND

•	Boilers burn coal and other substances such as oil or biomass (e.g., wood) to produce steam
and/or hot water, which is then used for energy or heat. They can also burn non-waste
materials but do so usually only in small amounts.

o Industrial boilers are used in manufacturing, processing, mining, refining or any other
industry.

o Commercial and institutional boilers are used in commercial establishments, medical
centers, educational facilities and municipal buildings.

o The majority of area source boilers covered by this rule are located at commercial and
institutional facilities.

•	There are approximately 1.3 million boilers located at areas source facilities that run on natural
gas. They are not covered by the final standards or these adjustments. The area source
standards covers approximately 183,000 boilers located at 92,000 area source facilities. Of the
183,000 covered units, approximately 182,400 (over 99%) need only to conduct periodic tune-
ups, and some of these also needed to perform a one-time energy assessment. Approximately
600 coal-burning units (less than 1%), that represent the largest of these sources, are required
to meet emission limits.

•	On March 21, 2011, EPA promulgated national air toxics standards for area source industrial,
commercial and institutional boilers. An area source facility has the potential to emit less than
10 tons per year of any single air toxic or less than 25 tons per year of any combination of air
toxics.

•	On February 1, 2013, EPA issued a final rule that amended the agency's 2011 air toxics
standards for industrial, commercial, and institutional area source boilers.

o The 2013 amendments, among other things, revised the definitions of startup and
shutdown periods.

o In addition, the 2013 amendments established a subcategory and separate
requirements for certain boilers that operate on a limited basis.

o The 2013 amendments also established an alternative PM standard for new oil-fired
boilers that combust low-sulfur oil, and new monitoring provisions that eliminate
further stack testing for PM and further fuel sampling for mercury under certain
circumstances based on initial compliance demonstrations.

•	EPA received three petitions for reconsideration of the 2013 amendments. The petitions were
submitted by:

o American Forest and Paper Association, American Wood Council, National Association of
Manufacturers, Biomass Power Association, Corn Refiners Association, National Oilseed

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Processors Association, Rubber Manufacturers Association, Southeastern Lumber
Manufacturers Association, and U.S. Chamber of Commerce
o Council of Industrial Boiler Owners and the American Chemistry Council
o Sierra Club, Clean Air Council, Partnership for Policy Integrity, Louisiana Environmental
Action Network, and Environmental Integrity Project

•	In January 2015, EPA issued a notice announcing reconsideration of, and requesting public
comment on, five specific issues in the agency's 2013 final amendments. EPA also proposed a
limited number of amendments to the final rule.

FOR MORE INFORMATION

•	The notice of reconsideration is posted at:
https://www3.epa.gov/airquality/combustion/actions.html and
https://www3.epa.gov/ttn/atw/boiler/boilerpg.html.

•	Today's action and other background information are also available either electronically at
http://www.regulations.gov. EPA's electronic public docket and comment system, or in
hardcopy at EPA Docket Center's Public Reading Room.

o The Public Reading Room is located in EPA Headquarters Library, Room Number 3334 in
EPA West Building, located at 1301 Constitution Ave., NW, Washington, DC. Hours of
operation are 8:30 a.m. to 4:30 p.m. eastern standard time, Monday through Friday,
excluding Federal holidays,
o Visitors are required to show photographic identification, pass through a metal

detector, and sign EPA visitor log. All visitor materials will be processed through an X-
ray machine as well. Visitors will be provided a badge that must be visible at all times,
o Materials for this action can be accessed using Docket ID No. EPA-HQ-OAR-2006-0790.

•	For further information about the action, contact Ms. Mary Johnson of EPA's Office of Air
Quality Planning and Standards, Sector Policies and Programs Division, Energy Strategies Group
at (919) 541-5025 or by e-mail at johnson.mary@epa.gov.

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