MINNESOTA POLLUTION CONTR'OL AGENCY WEB NOTICE ON DRAFT/PROPOSED AIR EMISSION FACILITY PERMIT

NOTICE IS HEREBY GIVEN, that the Commissioner of the Minnesota Pollution Control Agency (MPCA) proposes to issue Air Emission Permit No. 13700005-006, to USSteel Corp for their facility located at 8819 Old Highway 169, Mountain Iron, St. Louis County, Minnesota. The permit action isfor construction and operation of the facility. The permit action isamajor amendment; therefore, the draft/proposed permit has been placed on public notice. The MPCA is seeking the U.S. Environmental Protection Agency's (EPA)concurrent review of this draft/proposed permit and the EPA45-day review period will begin with the 30-day public review period. This Major Amendment permit action authorizes the replacement of the existing main kiln burners with Low Nitrogen Oxides (NOx) Main Burners on the facility's induration lines 4 and 5 (CE181 with SV118 and CE182 with SV127; respectively).This project will reduce NOx emissions from baseline emission rates. Remaining pollutants will remain at previously permitted rates

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.This permit action also removes language from the Total Facility level listed under "F. Retroactive Prevention of Significant Deterioration Program (PSD)Permitting Requirements
- Tasks, Reports and \ CEMSrelated to language requesting aComputational Fluid Dynamics (CFD)modeling report and installation of Low NOx Burners at the traveling grate preheat zones of the Agglomerator Lines 3-7. Minntac completed conditions related to CFDmodeling aswell asinstalled the traveling grate preheat Low NOx burners in 2009. Asummary of the Emissions Increase in tons per year isasfollows: Pollutant PM PMlO PM2
.5 S02 NO. VOCs CO C02e Lead Emissions Increase 0* 0* 0* 0* 0* 0.7 3.2 15,049 0* from Low NOx burners PM = Particulate Matter PM2
.5= PM smaller than 2.5 microns NO. = Nitrogen Oxides CO

# = Carbon Monoxide PMlO = PM smaller than 10 microns S02=Sulfur Dioxide VOCs=Volatile Organic Compounds C02e=Carbon Dioxide Equivalents asdefined in Minn. R. 7007.0100 *indicates no emissions increase The Permittee isnot required to submit apollution prevention progress report pursuant to Minn. Stat. 

### 9 115D.08. The preliminary determination to issue the air emission permit istentative. There are four formal procedures for public participation in the MPCA's consideration of the permit application. Interested persons may (1) submit written comments on the draft/proposed permit; (2) request tha.tthe MPCA hold apublic information meeting; (3) request the MPCA hold acontested case hearing; and/or (4) submit apetition to the Commissioner requesting that the MPCA Citizens' Board (Board) consider the permit matter.- - --- -----------------------------,,~------- '." ..•.. ,"

The decision whether to issue the permit and, if so, under what terms, will be presented to the Board for decision if: (1) the Commissioner grants the petition requesting the matter be presented to the Board; (2) an Board member requests to hear the matter prior to the time the Commissioner makes a final decision on the permit; or (3) arequest for acontested case hearing ispending. Otherwise, the Commissioner will make the decision. Persons who submit comments or petitions to the MPCA must state (1)their interest in the permit application or the draft permit; (2) the action they wish the MPCAto take, including specific refere,nces to the section of the draft permit they believe should be changed; and (3) the reasons supporting their position, stated with sufficient specificity asto allow the MPCAto investigate the merits of the position. Asdescribed in Minn. R.7000.1800, persons who submit requests for acontested case hearing must also state the issuesthey propose to address in acontested case hearing, the specific relief requested or resolution of the matter, and the reasons (which may be in the form of proposed findings) supporting an MPCAdecision to hold acontested case hearing. Failure to comply with these rules exactly may result in adenial of the request. The decision whether to hold acontested case hearing will be made under Minn. R.7000.1900. Most public libraries throughout the state have copies of the current Minnesota Rules. They are also available on the Internet at www.revisor.leg.state.mn.us. The public comment period commences June 8, 2013, and terminates July 8, 2013. Comments must be received in writing at the MPCAby 4:30 p.m. on July 8,2013. Evidence of timely receipt includes a date/time stamp imprinted on the first page of the written comments bythe first floor information and reception area of the MPCAor bythe Industrial Division support staff, or receipt byfax. Comments, requests, and petitions should besent to:

Sarah Seelen, Air Quality Permits Section Industrial Division, Minnesota Pollution Control Agency 520 Lafayette Road North, St. Paul, Minnesota 55155 651-757-2677
- Voice, 651-269-8717
- Fax Acopy of the draft/proposed permit will available on the MPCA's website at http://www.pca.state.mn.us/news/data/index.cfm?PN=l, or will also be mailed to any interested person upon the MPCA's receipt of awritten request. Additional materials relating to the issuance of this permit are available for inspection byappointment at the Minnesota Pollution Control Agency; 520 Lafayette Road North, St. Paul, Minnesota 55155, phone 651-757-2677, and, between the hours of 8:00 a.m. and 4:30 p.m., Monday through Friday. All MPCAoffices may be reached by calling 1-800-657-3864. /
DATED: May 30,2013

Don Smith, P.E.,Manager Air Quality Permits Section Industrial Division