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- Public Inspection
Approval and Promulgation of Implementation Plans; Colorado; Revisions to Regulation Number 7 and RACT Requirements for 2008 8-Hour Ozone Standard for the Denver Metro/North Front Range Nonattainment Area
The Environmental Protection Agency (EPA) is approving and conditionally approving State Implementation Plan (SIP) revisions submitted by the State of Colorado on May 31, 2017, May 14, 2018 and May 8, 2019. The revisions are to Colorado Air Quality Control Commission (Commission or AQCC) Regulation Number 7 (Reg. 7). The revisions to Reg. 7...
Air Quality State Implementation Plans; Approval and Promulgation of Implementation Plans; Utah; Infrastructure Requirements for the 2015 Ozone National Ambient Air Quality Standards; Correction
On June 1, 2020, the Environmental Protection Agency (EPA) published a rulemaking proposing to approve multiple elements of the infrastructure SIP requirements for the 2015 ozone NAAQS for the State of Utah, while taking no action on three infrastructure elements (85 FR 33052). On September 16, 2020, we published a rulemaking taking final action...
Control of Air Pollution From Airplanes and Airplane Engines: GHG Emission Standards and Test Procedures
The Environmental Protection Agency (EPA) is adopting greenhouse gas (GHG) emission standards applicable to certain classes of engines used by certain civil subsonic jet airplanes with a maximum takeoff mass greater than 5,700 kilograms and by certain civil larger subsonic propeller-driven airplanes with turboprop engines having a maximum...