Federal Register #EPA-R07-OAR-2026-2938

EPA Approval of Missouri SO₂ Attainment Plan for New Madrid Area

This opportunity concerns the Environmental Protection Agency's (EPA) proposed approval of Missouri's air quality attainment plan for the New Madrid nonattainment area, specifically targeting sulfur dioxide (SO₂) emissions: - Government Buyer: - Environmental Protection Agency (EPA), Region 7, Air and Radiation Division - Major SO₂ Sources and OEMs Involved: - Magnitude 7 Metals (M7M) - Associated Electric Cooperative Incorporated (AECI) New Madrid Power Plant - Products/Services and Requirements: - Enforceable SO₂ emission limits for M7M and AECI New Madrid Power Plant - M7M: Facility-wide SO₂ emissions capped at 4,999.99 tons per rolling 12-month period - Prohibition of SO₂ emissions from current carbon bake stacks unless rerouted to a new stack - Specific 1-hour average SO₂ emission rate limits for pot line stack, pot line fugitives roof vents, and new carbon bake stack - Compliance deadlines for operational changes and emission limits between January 2023 and January 2025 - AECI New Madrid Power Plant: Combined maximum 30-day daily rolling average SO₂ emissions rate limit of 5,523 lbs/hr for boilers EP01 and EP02 - Effective January 1, 2023 - Plan includes attainment demonstration, emissions inventories, control measures, nonattainment new source review, and contingency measures - Unique/Notable Requirements: - All emission limits are enforceable through consent agreements - Operational changes (e.g., new carbon bake stack at M7M) are required - Contingency measures are triggered by air quality monitoring results - Any changes to emission limits require public notice and EPA approval - No procurement of goods or services is requested; this is a regulatory approval process

Description

The Environmental Protection Agency (EPA) is proposing to approve the State Implementation Plan (SIP) revision submitted by the State of Missouri on May 3, 2023. This revision pertains to the attainment plan for the New Madrid nonattainment area for the 2010 1-hour sulfur dioxide (SO2) primary National Ambient Air Quality Standard (NAAQS). The plan includes the State's attainment demonstration, emission limitations, base-year and projection-year emission inventories, reasonably available control measures and technology, nonattainment new source review, progress requirements, and contingency measures. The EPA is proposing to approve Missouri's submission as meeting the relevant Clean Air Act requirements.

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