Primary Aluminum Reduction Industry - National Emission Standards for Hazardous Air Pollutants (NESHAP)
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This rule includes technology-based NESHAP for each new or existing potline, pitch storage tank, paste production operation, and anode bake furnace located at a primary aluminum reduction plant that is considered a major source of hazardous air pollutants (HAP) under title III of the Clean Air Act (CAA). This NESHAP address emissions of HAP from the Primary Aluminum Production source category including carbonyl sulfide, hydrogen fluoride, polycyclic organic matter, metal HAP (e.g., lead, nickel and manganese), polychlorinated biphenyls and mercury. This rule also includes risk-based emission limits to address the residual risk remaining after implementation of the NESHAP. These standards implement sections 112(d) and (f) of the CAA, as amended.
Primary aluminum reduction plants electrolytically reduce refined bauxite to form aluminum. Once formed, the aluminum may be processed via casting (pouring molten aluminum into a mold), rolling, extrusion, etc. to meet the shape, strength and durability requirements of its final use. Aluminum is used extensively in consumer packaging (e.g., cans and foil), transportation applications (e.g., cars, planes and trains) and in the building industry.
10/15/2015 - Final rule
01/15/2015 - Supplemental notice of proposed rulemaking; extension of public comment period
12/08/2014 - Supplemental proposed rulemaking
01/19/2012 - Proposed rule; extension of public comment period
12/06/2011 - Proposed rule
11/02/2005 - Final rule; amendments
03/17/2003 - Proposed rule; amendments
10/07/1997 - Final rule
09/26/1996 - Proposed rule and notice of public hearing
Background Information Document
Basis and Purpose Document for the Development of Proposed Standards for the Primary Aluminum Industry
View the supporting documents in the docket folder to find additional related documents to the rules.
Primary Aluminum Reduction Plants: New Source Performance Standards
Secondary Aluminum Production: National Emission Standards for Hazardous Air Pollutants
Plain Language Guide to the Primary Aluminum NESHAP-40 CFR 63, Subpart LL National Emission Standards for Primary Aluminum: Summary of Requirements for Implementing the NESHAP
Applicability Determination Index
Clarification of 40 CFR Part 63, Subpart LL Requirements Applicable to Potlines During Startup Periods
Inspection Checklist - Primary Aluminum NESHAP 40 CFR Part 63, Subpart LL