SUPPLEMENTARY INFORMATION:

I. Background

The CAA requires State regulatory agencies to implement emission guidelines and associated compliance times using a State plan developed under sections 111(d) and 129 of the CAA. Section 111(d) of the CAA establishes standards of performance for certain existing sources. Air pollutants included under this section are those which have not already been established as air quality criteria pollutants via 42 U.S.C. 7408(a) or hazardous air pollutants via 42 U.S.C. 7412. Section 111(d)(1) of the CAA requires States to submit to EPA for approval a plan that establishes standards of performance. The plan must provide that the State will implement and enforce the standards of performance.

Section 129 of the CAA requires emission guidelines to be promulgated for solid waste incineration units, including LMWC. Section 129 of the CAA mandates that all plan requirements be at least as protective as the promulgated emission guidelines, including fixed final compliance dates, fixed compliance schedules, and title V permitting requirements for all affected sources. Section 129 of the CAA also requires the States to submit plans to the EPA within one year after promulgation of the emission guidelines and compliance times.

The EPA prescribes a Federal plan if a State does not submit a State-specific plan or the submitted plan is disapproved. If a State has no designated facilities for a standards of performance source category, it may submit a negative declaration in lieu of a State plan for that source category in accordance with 40 Code of Federal ( printed page 55313) Regulations (CFR) 60.23(b), 60.23a(b) and 62.06.

The Emissions Guidelines and Compliance Times for Large Municipal Waste Combustors That are Constructed on or Before January 23, 2024, as codified at 40 CFR part 60 subpart WWWW (subpart WWWW) apply to States with existing LMWCs. The existing LWMCs to which the emission guidelines and compliance times apply is listed at 40 CFR 60.6300.

II. Summary of Action and EPA Analysis

ACHD submitted a negative declaration to the EPA on March 25, 2026, certifying that there are no existing large municipal waste combustors in its jurisdiction that are subject to the requirements of 40 CFR part 60 subpart WWWW. For additional background information on ACHD's negative declaration, see the documents that are available at Regulations.gov, Docket ID No. EPA-R03-OAR-2026-4027.

III. Proposed Action

The EPA is proposing to amend 40 CFR part 62 to reflect EPA's receipt of ACHD's negative declaration for LMWC. The negative declaration satisfies the requirements of 40 CFR 60.23(b), 60.23a(b) and 62.06, serving in lieu of a CAA section 111(d)/129 plan for existing large municipal waste combustors. The EPA is soliciting public comments on the issues discussed in this document. These comments will be considered before taking final action.

IV. Statutory and Executive Order Reviews

Under the CAA, the EPA has the authority to approve a 129/111(d) negative declaration in lieu of a State plan that complies with the provisions of the CAA and applicable Federal regulations. See40 CFR 62.06. In reviewing CAA section 129/111(d) negative declaration letters, EPA's role is to approve State choices, provided that they meet the criteria of the CAA and of EPA's implementing regulations. Accordingly, this action merely notifies the public of the EPA's receipt of ACHD's negative declaration for LMWC and does not impose additional requirements. For that reason, the EPA concludes the following.

A. Executive Order 12866: Regulatory Planning and Review and Executive Order 13563: Improving Regulation and Regulatory Review

This action is not a significant regulatory action and was therefore not submitted to the Office of Management and Budget (OMB) for review.

B. Executive Order 14192: Unleashing Prosperity Through Deregulation

This action is not expected to be an Executive Order 14192 regulatory action because this action is not significant under Executive Order 12866.

C. Paperwork Reduction Act (PRA)

This action does not impose an information collection burden under the PRA (44 U.S.C. 3501 et seq.) because it does not contain any information collection activities.

D. Regulatory Flexibility Act (RFA)

This action is certified as not having a significant economic impact on a substantial number of small entities under the Regulatory Flexibility Act (5 U.S.C. 601 et seq.).

E. Unfunded Mandates Reform Act (UMRA)

This action does not contain any unfunded mandate, as described in the Unfunded Mandates Reform Act of 1995 (2 U.S.C. 1531-1538) and does not significantly or uniquely affect small governments.

F. Executive Order 13132: Federalism

This action does not have federalism implications as specified in Executive Order 13132 (64 FR 43255, August 10, 1999) because it will not have substantial direct effects on the states, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government.

G. Executive Order 13045: Protection of Children From Environmental Health Risks and Safety Risks

Executive Order 13045 directs Federal agencies to include an evaluation of the health and safety effects of the planned regulation on children in Federal health and safety standards and explain why the regulation is preferable to potentially effective and reasonably feasible alternatives. This action is not subject to Executive Order 13045 because it is not a significant regulatory action under section 3(f)(1) of Executive Order 12866, and because the EPA does not believe the environmental health or safety risks addressed by this action present a disproportionate risk to children.

H. Executive Order 13211: Actions Concerning Regulations That Significantly Affect Energy Supply, Distribution or Use

This action is not subject to Executive Order 13211, because it is not a significant regulatory action under Executive Order 12866.

I. National Technology Transfer and Advancement Act (NTTAA)

This rulemaking does not involve technical standards. This action is not subject to the requirements of section 12(d) of the National Technology Transfer and Advancement Act of 1995 (15 U.S.C. 272 note) because application of those requirements would be inconsistent with the Clean Air Act.

J. Executive Order 13175: Consultation and Coordination With Indian Tribal Governments

This action does not have tribal implications as specified in Executive Order 13175. Thus, Executive Order 13175 does not apply to this action.

91 FR 55312