WASHINGTON, Aug. 28 (TNSFR) -- Pursuant to the Federal Clean Air Act (CAA), the U.S. Environmental Protection Agency (EPA) is proposing to approve the State implementation plan (SIP) revision submitted by the State of Oklahoma on March 12, 2026, for the regional haze program's first implementation period. Oklahoma's 2026 SIP submission revises previously approved source-specific requirements for the American Electric Power/Public Service of Oklahoma (AEP/PSO) Northeastern Power Station . . .

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