FACT SHEET
Proposed Amendments to the National Emission Standards for Hazardous Air Pollutants
(NESHAP): Asphalt Processing and Asphalt Roofing Manufacturing
ACTION
•	On April 16, 2019, the U.S. Environmental Protection Agency (EPA) proposed to amend
the 2003 National Emission Standards for Hazardous Air Pollutants (NESHAP) for Asphalt
Processing and Asphalt Roofing Manufacturing.
•	EPA is proposing minor amendments to enhance the effectiveness of the rule by
improving compliance and implementation.
•	EPA issued the air toxics standards for Asphalt Processing and Asphalt Roofing
Manufacturing on May 7, 2003. The rule applies to each new or existing asphalt
processing or asphalt roofing manufacturing facility that is a major source or is located
at a major source of hazardous air pollutants (HAP).
•	Following a residual risk and technology review (RTR) conducted in accordance with the
Clean Air Act (CAA), with this action EPA is proposing to:
o Revise requirements for periods of startup, shutdown and malfunction (SSM) to
be consistent with recent court decisions;
o Require electronic reporting of performance test results;
o Require periodic testing every 5 years; and
o Add flexibility to monitoring requirements for particulate matter (PM) controls
by proposing an option to use the manufacturer's specifications to establish
pressure drop limits and adjust the temperature limit from the temperature
measured during testing to 120 percent of the measured temperature.
•	EPA will accept comment on the proposed amendments for 45 days after publication in
the Federal Register.
RESIDUAL RISK ASSESSMENT
•	The CAA requires EPA to assess the risk remaining after application of the final air toxics
emissions standard. This is known as a residual risk assessment.
•	Based on the completed risk assessment, available health information and associated
uncertainties, EPA determined risks from the asphalt processing and asphalt roofing
manufacturing source categories are acceptable and provide an ample margin of safety
to protect public health.
TECHNOLOGY REVIEW
•	The CAA requires EPA to assess, review and revise air toxics standards, as necessary,
taking into account developments in practices, processes and control technologies. The
technology review of the standards for Asphalt Processing and Asphalt Roofing
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Manufacturing facilities did not identify any developments that would further reduce
HAP emissions beyond the original NESHAP.
BACKGROUND
•	The CAA requires EPA to regulate toxic air pollutants, also known as air toxics, from
categories of industrial facilities in two phases.
•	The first phase is "technology-based," where EPA develops standards for controlling the
emissions of air toxics from sources in an industry group or "source category." These
maximum achievable control technology (MACT) standards are based on emissions
levels that are already being achieved by the best-controlled and lower-emitting sources
in an industry.
•	Within 8 years of setting the MACT standards, the CAA directs EPA to assess the
remaining health risks from each source category to determine whether the MACT
standards protect public health with an ample margin of safety and protect against
adverse environmental effects. This second phase is a "risk-based" approach called
residual risk. Here, EPA must determine whether more health-protective standards are
necessary.
•	Also, every 8 years after setting MACT standards, the CAA requires EPA to review and
revise the standards, if necessary, to account for improvements in air pollution controls
and/or prevention.
HOW TO COMMENT
•	The EPA will accept comment on the proposal for 45 days after publication in the
Federal Register. Comments, identified by Docket ID No. EPA-HQ.-OAR-2017-0662,
may be submitted by one of the following methods:
o Go to www.regulations.gov and follow the online instructions for submitting
comments.
o Send comments by email to: a-and-r-Docket@epa.gov, Attention Docket ID No.
EPA-HQ-OAR-2017-0662.
o Fax your comments to: (202) 566-9744, Attention Docket ID. No. EPA-HQ-OAR-
2017-0662.
o Mail your comments to: EPA Docket Center, Environmental Protection Agency,
Mail Code: 28221T, 1200 Pennsylvania Ave., NW, Washington, DC 20460,
Attention Docket ID. No. EPA-HQ-OAR-2017-0662.
o Deliver comments in person to: EPA Docket Center, 1301 Constitution Ave., NW,
Room 3334, Washington, DC. Note: In person deliveries (including courier
deliveries) are only accepted during the Docket's normal hours of operation.
Special arrangements should be made for deliveries of boxed information.
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FOR MORE INFORMATION
•	Interested parties can download a copy of the proposed rule notice from EPA's website
at the following address: https://www.epa.gov/stationary-sources-air-pollution/asphalt-
processing-and-aspha It-roofing-manufacturing-national.
•	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 the EPA Docket Center's Public Reading Room.
o The Public Reading Room is located at EPA Headquarters Library, room number
3334 in the EPA WJC West Building, 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 the 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 proposed action can be accessed using Docket ID No. EPA-HQ-
OAR-2017-0662.
•	For further technical information about the rule, contact Tonisha Dawson, EPA's Office
of Air Quality Planning and Standards, at (919) 541-1454 or dawson.tonisha@epa.gov.
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