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Regulatory Development and Retrospective Review Tracker

Residual Risk and Technology Review Amendments to the Primary Aluminum Reduction National Emission Standard for Hazardous Air Pollutants (NESHAP)

a.k.a. NESHAP RTR for Primary Aluminum Reduction (subpart LL)

RIN: 2060-AQ92 (What's this?)

Docket No.: EPA-HQ-OAR-2011-0797 (What's this?)

Current Phase: Proposal (What's this?)

In this action the EPA is conducting a risk assessment to determine if the promulgated Maximum Achievable Control Technology (MACT) standards for hazardous air pollutant (HAP) emissions from primary aluminum reduction facilities are already protective of public health with an ample margin of safety or must be revised in order to provide that level of protection.

The EPA is also determining whether the promulgated MACT standards adequately protect against adverse environmental effects. The EPA is also reviewing technical progress in emissions control in the primary aluminum reduction source category to determine if it is necessary to revise the standards taking into account developments in practices, processes and control technologies. This action would implement sections 112(f)(2) and 112(d)(6) of the Clean Air Act. The EPA promulgated National Emission Standards for Hazardous Air Pollutants (NESHAP) for Primary Aluminum Reduction Plants (found in 40 CFR Part 63, Subpart LL) in 1997. This NESHAP applies to the owner or operator of each new pitch storage tank or new or existing potline, paste production plant, or anode bake furnace associated with primary aluminum reduction which is located at a major source, as defined in 40 CFR Section 63.2. The EPA proposed standards addressing residual risk and technology developments on December 6, 2011. If finalized, the proposed amendments would include new emissions standards for carbonyl sulfide emissions from new and existing potlines; new emissions standards for polycyclic organic matter (POM) from new and existing prebake potlines and existing pitch storage tanks; reduce the emissions standards for POM from existing Soderberg potlines; eliminate the startup, shutdown and malfunction exemption; and make certain other technical and editorial changes.

NPRM: Sent to OMB for Regulatory Review10/14/2011
NPRM: Received by OMB10/17/2011
NPRM: Regulatory Review Concluded11/04/2011
NPRM: Published in FR12/06/2011
NPRM: Comment Period Extension Published in FR01/19/2012
NPRM: Comment Period Closed with Extension02/01/2012
Supplemental NPRM: Published in FR09/2014 (projected)

Potential Effects

Environmental Justice
This rulemaking involves a topic that is likely to be of particular interest to or have particular impact upon minority, low-income, tribal, and/or other vulnerable populations because:

  • This topic is likely to result in the collection of information or data that could be used to assess potential impacts on the health or environmental conditions of vulnerable populations.

Federal Government - other agencies
Likely to be involved in the implementation of this rule.

Local Governments
Likely to be involved in the implementation of this rule.

State Governments
Likely to be involved in the implementation of this rule.

Participate / Learn More Regulatory Review

Some of EPA's rulemakings undergo regulatory review (What's this?), as prescribed by Executive Order 12866 and coordinated by the Office of Management and Budget (OMB). The following list describes which of this rulemaking's stages have completed review and published in the Federal Register, if any, and provides links to the review documents where available. Consult the "Timeline" section of this Web page for the dates of each review.

  • NPRM - This stage of the rulemaking underwent review.
  • Final Rule - No Information Available.
  • Final Rule - No Information Available.
Citations & Authorities

Federal Register Citations

Code of Federal Regulations (CFR) Citation
40 CFR 112

Legal Authority
42 USC 7412


This site provides summaries of priority rulemakings and priority retrospective reviews of existing regulations. We update most of the site at the beginning of each month, though some data is updated more frequently if it is time sensitive. The information on this site is not intended to and does not commit EPA to specific conclusions or actions. For example, after further analysis, EPA may decide the effects of a rule would be different or it may decide to terminate a rulemaking.

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