1 

FINAL INDEX TO DOCKET EPA-R09-OAR-2016-0287 

AJO AND MORENCI SECOND 10-YEAR MAINTENACE PLANS 

1971 SO2 NAAQS; TECHNICAL CORRECTION, AJO BOUNDARY

DIRECT FINAL RULE AND PROPOSED RULE 

A. U.S. EPA Guidance Documents, Policies, and Rulemakings 

B. State Plans, Rules, Support Documents, Reports, and Correspondence 

C. Additional Documents for Proposed Rulemaking 

D. Notices of Proposed Rulemaking and Technical Support Document 

E. Public Comments and Related Documents 

F. Notices of Final Rulemaking, Reclassification 

A. U.S. EPA Guidance Documents, Policies, and Rulemakings 

1. 43 FR 8962, Title 40 – Protection of the Environment, Chapter 1 – Environmental Protection 

Agency, Subpart C – Air Programs, Part 81 – Air Quality Control Regions, Criteria, and Control 

Techniques, Final rule (March 3, 1978). 

2. 44 FR 21261, Air Quality Control Regions, Criteria and Control Techniques; Attainment Status 

Designations, final rule (April 10, 1979). 

3. Memorandum dated September 4, 1992, from John Calcagni, Director, Air Quality Management 

Division, Office of Air Quality Planning and Standards, US EPA, to Air Division Directors, Regions 

I-X, entitled “Procedures for Processing Requests to Redesignate Areas to Attainment.” 

4. Memorandum dated January 26, 1995, from Sally Shaver, USEPA Air Quality Strategies and 

Standards Division, OAQPS, to Regional Office Air Division Directors, entitled Attainment 

Demonstration Policy for Sulfur Dioxide Nonattainment Areas. 

5. Memorandum dated October 18, 2000, from John S. Seitz, Director, Office of Air Quality 

Planning and Standards, U.S. EPA, to Air Division Directors, Regions I-X, “Redesignation of SO2

Nonattainment Areas in the Absence of Monitored Data.” 

6. 68 FR 62239, Approval and Promulgation of Implementation Plans and Designation of Areas for 

Air Quality Planning Purposes; Arizona; direct final rule (November 3, 2003). 

7. 69 FR 22447, Approval and Promulgation of Implementation Plans and Designation of Areas for 

Air Quality Planning Purposes; Arizona; direct final rule (April 26, 2004). 

8. 75 FR 35520, Primary National Ambient Air Quality Standard for Sulfur Dioxide; Final rule 

(June 22, 2010). 

9. Memorandum dated April 11, 2011 from Tyler Fox, Leader, Air Quality Modeling Group, Office 

of Air Quality Planning and Standards, U.S. EPA, to EPA Regional Modeling Contacts, 
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“AERSCREEN Released as the EPA Recommended Screening Model.” 

10. 80 FR 67319, Revisions to Air Plan; Stationary Sources; New Source Review; final rule 

(November 2, 2015). 

B. State Plans, Rules, Support Documents, Reports, and Correspondence 

1. Arizona State Implementation Plan Revision, Maintenance Plan for the Ajo Sulfur Dioxide Planning 

Area (1971 NAAQS), Air Quality Division, Arizona Department of Environmental Quality, February 

2013. 

2. Arizona State Implementation Plan Revision, Maintenance Plan for the Morenci Sulfur Dioxide 

Planning Area (1971 NAAQS), Air Quality Division, Arizona Department of Environmental Quality, 

December 2014. 

C. Additional Documents for Proposed Rulemaking 

1. National Interagency Fire Center’s website at https://www.nifc.gov/fireInfo/fireInfo_statistics.html, 

“Historical year-end statistics by state,” accessed May 9, 2016 and August 31, 2016. 

2. https://en.wikipedia.org/wiki/List_of_Arizona_wildfires, accessed May 9, 2016 and August 31, 2016. 

D. Notice of Proposed Rulemaking 

1. Notice of Proposed Rulemaking, Approval of Arizona Air Plan Revisions; Ajo and Morenci, 

Arizona; Second 10-Year Sulfur Dioxide Maintenance Plans and Technical Correction; proposed 

rule; prepublication version, signed December 15, 2016. 

2. 82 FR 2308, Approval of Arizona Air Plan Revisions; Ajo and Morenci, Arizona; Second 10-

Year Sulfur Dioxide Maintenance Plans and Technical Correction; proposed rule (January 9, 2017). 

E. Public Comments and Related Documents 

F. Notice of Final Rulemaking 

1. Notice of Direct Final Rulemaking, Approval of Arizona Air Plan Revisions; Ajo and Morenci, 

Arizona; Second 10-Year Sulfur Dioxide Maintenance Plans and Technical Correction; direct final 

rule and technical correction; prepublication version, signed December 15, 2016. 

2. 82 FR 2239, Approval of Arizona Air Plan Revisions; Ajo and Morenci, Arizona; Second 10-

Year Sulfur Dioxide Maintenance Plans and Technical Correction; direct final rule and technical 

correction (January 9, 2017).