### UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION IX ADMINISTRATIVE RECORD ADVANCED NOTICE OF PROPOSED RULEMAKING Assessment of Anticipated Visibility Improvements a t Surrounding Class I Areas and Cost Effectiveness of Best Available Retrofit Technology for Four Corners Power Plant and Navajo Generating Station Docket No. EPA-R09-OAR-2009-0598

DOCKET INDEX Docket Section or Item Date of Item Docket

Item No. I. Documents Submitted by Facilities  Best Available Retrofit Technology (BART) Modeling Protocol for Salt River Project (SRP) Navajo Generating Stat ion (NGS) 9/07 0002

 BART Analysis for SRP-NGS 11/07 0003  Arizona Public Service (APS) Company Four Corners P ower Plant (FCPP) BART Analysis for NO x and Particulate Matter o Table of Contents o Introduction o Modeling Protocol o Engineering Analysis o Modeling Report o Conclusions 1/29/08 0004

 Response to Request for Additional Information and 5/14/08 Conference Call from APS to EPA 5/28/08 0005

 Response to Request for List of Fugitive Emission S ources from APS to EPA 6/10/08 0006

 Letter from SRP to EPA re: BART Analysis – Cost Inf ormation NGS 7/29/08 0007

 Email from SRP to EPA re: Detailed Cost Assumptions for NGS 8/20/08 0008

 APS Supplemental BART Analysis o Letter from APS to EPA o Cover and Contents o Supplemental BART Visibility Report o PM Source List o Updated BART Conclusions 12/16/08 12/06/08 11/08 12/08 12/08 0009

 NGS Revised BART Analysis o Cover Letter 12/08 0010o Revised BART Report

 Response from APS to EPA BART Analysis Information Request on Costs 3/16/09 0011

 Letter from SRP to EPA following May 7, 2009 Meetin g 6/3/09 0012  Conceptual Plan for Ammonia Monitoring in the Vicin ity of the NGS 6/18/09 0013 II. Documents from Impacted States  Letter from Arizona Department of Environmental Qua lity to EPA 6/12/08 0014

 Letter from Colorado Department of Public Health an d Environment to EPA 5/21/08 0015 III. Documents from Federal Land Managers  Letter from USDA Forest Service to EPA 3/16/09 0016  Letter from National Park Service to EPA 7/24/09 00 17 o Appendices 7/24/09 0036.1- 59 IV. Documents from Other Stakeholders  Letter from Central Arizona Project to EPA – Commen ts on BART Evaluation for NO x at NGS 7/13/09 0018 V. Correspondence from EPA  Letter from EPA to FCPP 4/29/08 0019  Letter from EPA to NGS 4/29/08 0020  Letter from EPA to APS 7/1/08 0021  Letter from EPA to NGS 7/1/08 0022 VI. Documents Referenced in ANPRM  AP-42 Chapter 1.1 Bituminous and Subbituminous Coal Combustion 9/98 0023

 AP-42 Background Document for Chapter 1.1 9/98 002 4  Hydrogen Chloride and Hydrogen Fluoride Emission Fa ctors for the NAPAP Inventory, EPA-600/7-85-041 10/85 0025

 EPA Air Pollution Control Cost Manual, 6 th Edition, Section 1, Chapter 2 – Cost Estimation: Concepts and Methodolo gy, EPA/452/B-02-001 1/02 0026

 EPA Air Pollution Control Cost Manual, 6 th Edition, Section 4, Section 4.2 – NO x Post-Combustion, Chapter 2 – SCR, EPA/452/B-02-001 9/00 0027

 Estimating Total Sulfuric Acid Emissions from Stati onary Power Plants 1016384, Electric Power Research Insti tute, Palo Alto, CA, Technical Update 3/08 0028

 Evaluation and Mitigation of Visible Acidic Aerosol Plumes 9/06 0029from Coal Fired Power Boilers, Final Report, EPA/60 0/R-06-

156  Estimating Total Sulfuric Acid Emissions from Coal- fired Power Plants, R. Hardman, R. Stacy, and E. Dismukes , Revised K. Harrison and L. Monroe 9/98 0030

 SO 3 Mitigation – Current Utility Operating Experience, Electric Power Research Institute, Palo Alto, CA 1010754, Te chnical Update 3/06 0031

 White Paper – Selective Catalytic Reduction (SCR) C ontrol of NO x Emissions from Fossil Fuel-Fired Electric Power Pl ants, Institute of Clean Air Companies 5/09 0032

 Interagency Workgroup On Air Quality Modeling (IWAQ M) Phase 2 Summary Report And Recommendations For Mode ling Long Range Transport Impacts (EPA-454/R-98-019) 12/98 0033

 Guidance for Estimating Natural Visibility Conditio ns Under the Regional Haze Rule, EPA-454/B-03-005 9/03 0034

 CALPUFF modeling files are available upon request ( not posted to docket)  Emission calculation files are available upon reque st (not posted to docket) VII. Advanced Notice of Proposed Rulemaking  Signed Notice 0035 VIII. Sign-In Sheets  Clean Energy Group 3/3/10 0232  SRP Federal Agency 2/11/10 0233 IX. Public Comments Submitted  Robert Wagner 9/9/09 0037  Norman Fichthorn 9/9/09 0038  John Slaughter 8/25/09 0039  Rachell Hoopes 8/26/09 0040  Robert Wagner 8/28/09 0041  David Steele 8/31/09 0042  David Modeer 9/1/09 0043  Richard Hayslip 9/1/09 0044  Mark Schiavoni 9/2/09 0045  Norman Fichthorn 9/3/09 0046  Gary Yaquinto 9/4/09 0047  Mark Camrud 9/7/09 0048  Erik Bakkan 9/9/09 0055  Glenn Hamer 9/9/09 0056 Carla Sonntag 9/9/09 0057

 William Hagler 9/10/09 0058  James Sims 9/11/09 0059  Kim Ground 9/14/09 0060  David Modeer 9/15/09 0061  Mark Schiavoni 9/15/09 0062  Richard Hayslip 9/15/09 0063

 Norman Fichthorn 9/16/09 0069 & 0069.1

 Benjamin H. Grumbles 9/18/09 0070& 0070.1

 James B. Martin 9/25/09 0071& 0071.1  Seth Cohen 9/28/09 0072  John Suthers 9/28/09 0073  Ann Kirkpatrick 9/16/09 0074  William Sharer 9/18/09 0075  Kris Dixon 9/28/09 0076  Raul Grijalva 10/7/09 0077  Janice Brewer 10/13/09 0078  John Lewis 10/13/09 0079  Ed Pastor 10/14/09 0080  Harry Mitchell 10/14/09 0081  Ann Kirkpatrick, Trent Franks, Jeff Flake, Gabriell e Giffords 10/15/09 0082  Ben Lujan, Harry Teague, Ann Kirkpatrick 10/15/09 0 083  Warde Nichols 10/16/09 0084  Roger Irwin 10/19/09 0085  Ward Nicholas 11/23/09 0086  Mary A. Felter 9/19/09 0087  Roger Irwin 11/23/09 0088  Jeff Bingaman 10/19/09 0089  Kirk Adams 10/21/09 0090  Robert Burns 10/21/09 0091  Michael Curtis 10/22/09 0092  Christopher Deschene 10/23/09 0093  John Kyl, John McCain, John Shadegg 10/23/09 0094  Carla Sonntag 10/23/09 0095  Andy Janeczek 10/24/09 0096  Orestuf 10/24/09 0097  Karsten Crouse 10/24/09 0098  Jodi Foran 10/25/09 0099  Jodi Foran 10/25/09 0100  Bill Vana 10/25/09 0101  Tom Buschatzke 10/26/09 0108  Alisa Gardiner 10/26/09 0109 Stephanie Huss 10/26/09 0110

 Karen Lovelien and Fred Boshardt 10/26/09 0111  Janet Rees 10/26/09 0112  Joe Ward 10/26/09 0113  Jim D’Arezzo 10/27/09 0115  Nancy Norem 10/27/09 0116  Steven Olson 10/27/09 0117  Cynthia Ortman 10/27/09 0118  Gary Yaquinto 10/27/09 0119  Alice Boyd 10/28/09 0120  Michael Cochran 10/28/09 0121  Mike Eisenfeld 10/28/09 0122  Norman Fichthorn 10/28/09 0123  Eric Massey 10/28/09 0124  William Hagler 10/28/09 0125  Richard Hayslip 10/28/09 0126  Charles Roybal 10/28/09 0127  Robert Lynch 10/28/09 0128  Douglas Miller 10/28/09 0129  William Rhodes 10/28/09 0130  Chris Udall 10/28/09 0131  Jeff Biggs 9/14/09 0150  Glenn Hamer 9/15/09 0151  Gary Yaquinto 9/15/09 0152  David Crockett 9/17/09 0153  Keith Johns 9/17/09 0154  Carol Spencer and Margaret McDaniel 9/21/09 0155  John Johnson 10/1/09 0156  Thomas and Diane Metzger 10/5/09 0157  Mary Felter 10/12/09 0158  John Lewis 10/13/09 0159  John Camper 10/19/09 0160  Boyd Dunn 10/19/09 0161  David Crockett 10/21/09 0162  Jeff Biggs 10/22/09 0163  Loren Brown 10/22/09 0164  James Cavanaugh 10/23/09 0165  John Lewis 10/23/09 0166  Mary Felter 9/11/09 0167  James Doyle 9/15/09 0168  Joe Shirley, Jr. 9/16/09 0169  Rick Cables and Corbin Newman 10/26/09 0170  David Godlewski 10/26/09 0171  Michael Guymon 10/26/09 0172  Marshall Brown 10/23/09 0173 Dean Martin 10/26/09 0174

 Peter Spehar 10/20/09 0175  William Hagler 10/27/09 0176  Mary Uhl 10/28/09 0177  Lorri Gray-Lee 10/20/09 0178  Wally Murphy 11/3/09 0190  66 letters Various 0191  1766 letters Various 0192  291 letters Various 0193  4400 letters Various 0194  Ed Fox 10/28/09 0195  Amy Atwood et al. 10/28/09 0196  James Doyle 10/14/09 0197  Philip Saletta 9/28/09 0200  Robert L. Burns 12/2/09 0201  Harry E. Mitchell 11/24/09 0202  Janice Brewer 12/18/09 0203  Stephen B. Etsitty 12/18/09 0204  John R. Lewis 12/18/09 0205  David Modeer 12/18/09 0206  Ned Norris, Jr. 12/11/09 0207  Michael Snyder 11/20/09 0208  Joe Shirley, Jr. 3/1/10 0209  William Rhodes 2/23/10 0210  Leroy Shingoitewa 3/1/10 0211  Ned Norris, Jr. 3/1/10 0212  Leroy Shingoitewa 3/1/10 0213  Robert Palmquist 3/1/10 0214  John R. Jacobsen 4/5/10 0216  Ed Helbing 4/5/10 0217  Scott Michlin 4/5/10 0218  Richard M. Hayslip 4/5/10 0219  Eladio M. Knipping, Naresh Kumar, and Stephanie L. Shaw 4/5/10 0220  Glenn Kellow 4/5/10 0221  David S. Steele 4/5/10 0222  Norman W. Fichthorn 4/5/10 0223  Anonymous 4/5/10 0224  Lin Sloan 4/5/10 0225  Vincent Yazzie 4/5/10 0226  Erik Bakken 4/5/10 0227  Allen Z. Wollscheidt 4/5/10 0228  Anonymous 4/5/10 0229  Eladio M. Knipping, Naresh Kumar, and Stephanie L. Shaw 4/5/10 0230  Mary Uhl 4/5/10 0231  Larry Echo Hawk 4/21/10 0235 Misc. 4/21/10 0236

 Peter Yucupicio 4/21/10 0237  Kate Waite 4/21/10 0238  John Mullen 4/21/10 0239  Sandra L. Doty 4/21/10 0240  Gordon R. Briggs 4/21/10 0241  Elizabeth J. Rohn-Nelson 4/21/10 0242  April Riggins 4/21/10 0243  Diane Enos 4/21/10 0244 X. EPA Responses to Requests for Extension  Norman Fichthorn 9/9/09 0049  Richard Hayslip 9/9/09 0050  David Modeer 9/9/09 0051  Mark Schiavoni 9/9/09 0052  David S. Steele 9/9/09 0053  Gary M. Yaquinto 9/9/09 0054  Erik Bakkan 9/14/09 0064  James T. Sims 9/14/09 0065  William Hagler 9/14/09 0066  Carla Sonntag 9/14/09 0067  Glenn Hamer 9/14/09 0068  Gabrielle Giffords 11/4/09 0102  Raul Grijalva 11/4/09 0103  Ann Kirkpatrick 11/4/09 0104  John Kyl 11/24/09 0105  John McCain 11/24/09 0106  John Shadegg 11/24/09 0107  Joe Shirley 11/24/09 0114  Jeff Bingaman 11/24/09 0132  Lynda M. Lovejoy 11/24/09 0133  Warde V. Nichols 11/24/09 0134  Ed Pastor 11/24/09 0135  Elred Enas 11/24/09 0136  Mike Jackson 11/24/09 0137  Ronnie Lupe 11/24/09 0138  Louis J. Manuel 11/24/09 0139  Wilfred Whatoname 11/24/09 0140  Peter Yucupicio 11/24/09 0141  Thomas Beauty 11/24/09 0142  Sherry Cordova 11/24/09 0143  Ned Norris 11/24/09 0144  Wendsler Nosie 11/24/09 0145  Ben Ray Lujan 11/24/09 0146  Harry Teague 11/24/09 0147 Jeff Flake 11/24/09 0148

 Trent Franks 11/24/09 0149  Ivan Smith 11/13/09 0179  Don Watahomigie 11/13/09 0180  Timothy Williams 11/13/09 0181  Ona M. Segundo 11/13/09 0182  Nonnan Cooeyate 11/13/09 0183  William Rhodes 11/13/09 0184  Raphael Bear 11/13/09 0185  Diane Enos 11/13/09 0186  Evelyn James 11/13/09 0187  Ernie Jones 11/13/09 0188  Christopher Clark Deschene 11/17/09 0189  Lori-Gary Lee 11/25/09 0198  David Modeer 11/25/09 0199