MI Taconite FIP Document Locator

I. State Submittals A. Michigan Regional Haze SIP Submittal, November 5, 2010 II. Best Available Retrofit Technology (BART) Analyses Submitted to State by Facilities A. Tilden III. 114 Information A. Tilden Mining Company 1. Tilden 114 Cover Letter, May 25, 2012 2. Tilden Item 1 Response a. Tilden Hematite Flowsheet b. Tilden 3. Tilden Item 2 Response 

### a. Tilden Operating Data 4. Tilden Item 3 Response a. Tildenl Natural Gas Usage 5. Tilden Item 4 Response a. Tilden Coal Analysis November 2006 Through December 2011 6. Tilden Item 5 Response a. Tilden 2005 SO2 Stack Test 7. Tilden Item 6 Response a. Tilden Potential To Emit Calculations for NOx and SO2 8. Tilden Item 7 Response a. Tilden – Barr Email Regarding the Cost To Increase Scrubber Efficiency, July 14, 2006 b. Tilden – Potential SO2 Control Efficiencies with Second Scrubber c. Tilden – MPCA Study Entitled: “Evaluation of Minnesota Taconite Wet Scrubbers at Minntac, Keewatub Taconite, Hibbing Taconite, and United Taconite” d. Tilden – MPCA/Barr Engineering Report Entitlted “Potential Impacts of the Federal Regional Haze and Best Available Retrofit Technology Rules on the Taconite Industry In Minnesota” e. Tilden – Northshore Furnace 5 Restart BACT Analysis 9. Tilden Item 7-9 Supporting Documents a. Hibbing – Guidance Documents: Regulations and Guidelines for Best Available Retrofit Technology (BART) Determinations, 70 FR 39164 b. Hibbing – Guidance Documents: MPCA's 2006 Guidelines for Facilities Conducting a BART Analysis B. Barr 1. Barr – Cover Letter and Table of Contents 2. Barr – Response 1 Through 5 3. Barr – Attachment A Cost Threshold Response 1 4. Barr – Attachment B Keetac Cost Response 2 5. Barr – Attachment C Minntac Cost Response 2 6. Barr – Attachment D Northshore Cost Response 2 7. Barr – Attachment E Hibbtac Cost Response 2 8. Barr – Attachment F United Taconite Cost Response 2 9. Barr – Attachment G ArcelorMittal Cost Response 2 10. Barr – MSI BACT Report Resposne 5 11. Barr – Essar BACT Response 5 12. Barr – Northshore Furnace 5 Restart Vol I BACT Response 5 13. Barr – Keetac NOx Technology Evaluation Response 5 IV. NOx BART Analysis – Low NOx Burner Technical Support A. FIVES Fact Sheets B. U.S. Steel Minntac NOx Reduction Technology Report, January 30, 2009 C. Essar Burner Test 21a, July 28, 2011 D. ESML-MPCA Quarter-Scale Low NOx Burner Test Report , September 26, 2011page 2 of 2 E. Summary Report for U.S. Steel Minntac NOx Kilns 6 and 7 F. U.S. Steel Minntac Line 6 Low NOx Burner Final Report, December 1, 2011 G. Essar and Barr SME 2012 Presentaion H. FIVES SME 2012 Presentation, April 17, 2012 I. Minntac Line 6 NOx Emissions V. SO2 BART Analysis A. Flue-Gas Desulfurization (FGD) Feasibility

a. Essar b. Keetac c. Dry Controls Permit Application – Minntac d. SO2 Emissions Summary for Tilden and UTAC e. Small Unit Dry FGDs f. BART DJ3 December 2007 g. GBB BART Eng Analysis Attachment B 3. Excerpts from ESSAR SO2 BACT B. FGD Cost Effectiveness and Limits 1. Email from Chrissy Bartovich to Steven Rosenthal Regarding Capital Equipment Costs, July 2, 2012 2. Email from Chrissy Bartovich to Steven Rosenthal Regarding Line 6 Questions, July 19, 2012 3. Information on Dry FGD Costs (Includes Email from Kevin Tran to Steven Rosenthal)

a. Revised Corrected Updated UTAC Line 1 GSA@90% b. Revised Corrected Updated UTAC Line 1 GSA@95% c. Revised Corrected Updated UTAC Line 2 GSA@90% d. Revised Corrected Updated UTAC Line 2 GSA@95% 5. Email from Candice Maxwell to Steven Rosenthal Regarding United Taconite Line 1 and 2 Scrubbers, June 18, 2012 6. Tilden Line 1Using GSA and ESP ID Fan Costs a. Tilden GSA-ESP 7. Tilden Line 1 a. Revised Updated Tilden GSA b. Tilden Conventional SO2 Absorber Scrubber Workbook c. Tilden SO2 Wet Scrubber from UTAC d. Tilden SO2 Venturi Rod Scrubber Workbook 8. Cost-effectiveness Metrics 9. EPA Air Pollution Control Cost Manual VI. Discussion of Testing, Monitoring, Recordkeeping and Reporting Requirements 4. United Taconite Line 1 and Line 2 SO2 Cost-Effectiveness Analysis, August 1, 2012 1. Email from Lars Hansen to Sara Cervak Regarding Installation Times for Dry Circulating Fluid Bed Scrubbers , July 13, 2012 2. Technical Support for SO2 Control Technology