# Air Plan Approval; Illinois; Base Year Emissions Inventory for the 2015 Ozone Standard
**AGENCY:**
Environmental Protection Agency (EPA).
**ACTION:**
Proposed rule.
**SUMMARY:**
The Environmental Protection Agency (EPA) is proposing to approve, under the Clean Air Act (CAA), revisions to the State Implementation Plan (SIP) submitted by the Illinois Environmental Protection Agency on October 22, 2020, and February 14, 2023. The revisions address the emissions inventory requirements for the Chicago and Metro-East nonattainment areas under the 2015 ozone National Ambient Air Quality Standard. The Chicago nonattainment area includes Cook, DuPage, Grundy (Aux Sable and Goose Lake Townships), Kane, Kendall (Oswego Township), Lake, McHenry, and Will counties. The Metro-East nonattainment area includes Madison, Monroe, and St. Clair counties. The CAA requires emissions inventories for all ozone nonattainment areas.
**DATES:**
Comments must be received on or before September 14, 2023.
**ADDRESSES:**
Submit your comments, identified by Docket ID No. EPA-R05-OAR-2020-0555 at *https://www.regulations.gov* or via email to *[email protected].* For comments submitted at *Regulations.gov* , follow the online instructions for submitting comments. Once submitted, comments cannot be edited or removed from *Regulations.gov* . For either manner of submission, EPA may publish any comment received to its public docket. Do not submit electronically any information you consider to be Confidential Business Information (CBI) or other information whose disclosure is restricted by statute. Multimedia submissions (audio, video, etc.) must be accompanied by a written comment. The written comment is considered the official comment and should include discussion of all points you wish to make. EPA will generally not consider comments or comment contents located outside of the primary submission ( *i.e.* on the web, cloud, or other file sharing system). For additional submission methods, please contact the person identified in the *FOR FURTHER INFORMATION CONTACT* section. For the full EPA public comment policy, information about CBI or multimedia submissions, and general guidance on making effective comments, please visit *https://www2.epa.gov/dockets/commenting-epa-dockets.*
**FOR FURTHER INFORMATION CONTACT:**
Emily Crispell, Environmental Scientist, Control Strategies Section, Air Programs Branch (AR18J), Environmental Protection Agency, Region 5, 77 West Jackson Boulevard, Chicago, Illinois 60604, (312) 353-8512, *[email protected].* The EPA Region 5 office is open from 8:30 a.m. to 4:30 p.m., Monday through Friday, excluding Federal holidays and facility closures due to COVID-19.
**SUPPLEMENTARY INFORMATION:**
In the Final Rules section of this *Federal Register* , EPA is approving the state's SIP submittal as a direct final rule without prior proposal because the Agency views this as a noncontroversial submittal and anticipates no adverse comments. A detailed rationale for the approval is set forth in the direct final rule. If no relevant adverse comments are received in response to this rule, no further activity is contemplated. If EPA receives such comments, the direct final rule will be withdrawn and all public comments received will be addressed in a subsequent final rule based on this proposed rule. EPA will not institute a second comment period. Any parties interested in commenting on this action should do so at this time. Please note that if EPA receives adverse comment on an amendment, paragraph, or section of this rule and if that provision may be severed from the remainder of the rule, EPA may adopt as final those provisions of the rule that are not the subject of an adverse comment. For additional information, see the direct final rule which is located in the Rules section of this *Federal Register* .
Dated: August 8, 2023.
Debra Shore,
Regional Administrator, Region 5.