Docket Index Table of Contents
A.	U.S. EPA Rulemakings, Guidance Documents, Informational Memoranda, Technical Support Documents, Memoranda to File, and Data Analysis Documents	1
B.	State Plans, Rules, Support Documents, Reports, and Correspondence	2
C.	Notice of Proposed Rulemaking	3
D.	Public Comments and Related Documents	3
E.	Additional Documents Considered for Final Rulemaking	3
F.	Notice of Final Rulemaking	4

U.S. EPA Rulemakings, Guidance Documents, Informational Memoranda, Technical Support Documents, Memoranda to File, and Data Analysis Documents
52 FR 24634, Revisions to the National Ambient Air Quality Standards for Particulate Matter; Final rule (July 1, 1987).
71 FR 61144, National Ambient Air Quality Standards for Particulate Matter; Final rule (October 17, 2006).
58 FR 67334, Designation of Areas for Air Quality Planning Purposes; Final rule (December 21, 1993).
67 FR 7082, Clean Air Act Attainment Finding; Bullhead City and Payson Nonattainment Areas, AZ; Sacramento and San Bernardino Nonattainment Areas, CA; Particulate Matter of 10 Microns or Less (PM-10); Final rule (February 15, 2002).
67 FR 43020, Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes: Arizona; Direct final rule (June 26, 2002).
Memorandum dated September 4, 1992, from John Calcagni, Director, Air Quality Management Division, Office of Air Quality Planning and Standards, U.S. EPA, to Air Division Directors, Regions I-X, entitled "Procedures for Processing Requests to Redesignate Areas to Attainment." 
Memorandum dated August 9, 2001, from Lydia Wegman, Director, Office of Air Quality Planning and Standards, to Directors of EPA Regional Air Programs entitled "Limited Maintenance Plan Option for Moderate PM10 Nonattainment Areas."
Letter dated October 29, 2021, from Gwen Yoshimura, Manager, Air Quality Analysis Office, EPA Region IX, to Daniel Czecholinski, Director, Air Quality Division, Arizona Department of Environmental Quality.
Letter dated April 25, 2019, from Elizabeth J. Adams, Director, Air Quality Analysis Office, EPA Region IX, to Timothy J. Franquist, Director, Air Quality Division, Arizona Department of Environmental Quality.
EPA Air Quality System Air Monitoring Program (AMP) 450 Quicklook Criteria Parameters for 2001-2021, accessed November 5, 2021.
EPA Air Quality System Air Monitoring Program (AMP) 480 Design Value Report for 2001-2021, accessed November 5, 2021.
EPA PM10 Design Value Spreadsheet, August 6th, 2015.
Technical Support Document (TSD) for EPA's Rulemaking for the Arizona State Implementation Plan; Bullhead City Area 2[nd] Period Limited Maintenance Plan (LMP); November 2021.
Emissions Inventory Data AZ 2011 2014 2017.xlsx
    
State Plans, Rules, Support Documents, Reports, and Correspondence
State Implementation Plan Submissions Addressed by this Rulemaking
Letter dated May 24, 2012, from Eric Massey, Director, Air Quality Division, ADEQ, to Jared Blumenfeld, Regional Administrator, U.S. Environmental Protection Agency, Region IX, including enclosures. 
Arizona Revised Statutes
ADEQ, "State Implementation Plan Completeness Checklist, Submittal of Final Update of the Limited Maintenance Plan for the Bullhead City PM10 Maintenance Area" 
ADEQ, "Arizona State Implementation Revision: Limited Maintenance Plan Update for the Bullhead City PM10 Maintenance Area (2012)."
ADEQ, "Public Process Documentation"
          
 Additional State Documents
ADEQ, Bullhead City Moderate Area PM10 Maintenance Plan and Request for Redesignation to Attainment, February 2002.
Letter dated April 26, 2021, from Daniel Czecholinski, Director, Air Quality Division, Arizona Department of Environmental Quality, to Gwen Yoshimura, Manager, Air Quality Analysis Office, EPA Region 9.
ADEQ, "Bullhead City Update using MOVES," November 8, 2013.
Email dated October 26, 2021, from Jessica Wood, CARB, to Panah Stauffer, EPA Region IX, Subject: "Bullhead City EI Analysis."
Attachment: Bullhead EI workbook.xlsx.
Letter dated November 12, 2003, from Stephen A. Owens, Director, Arizona Department of Environmental Quality, to Wayne Nastri, Regional Administrator, U.S. Environmental Protection Agency, Region IX, "Re: Demonstration of continued maintenance of the PM10 NAAQS for the Bullhead City PM10 Area."
Letter dated October 6, 2005, from Stephen A. Owens, Director, Arizona Department of Environmental Quality, to Wayne Nastri, Regional Administrator, U.S. Environmental Protection Agency, Region IX, "Re: Maintenance of the PM10 NAAQS and Limited Maintenance Plan design values for the Bullhead City PM10 maintenance area  -  1999-2003."
Letter dated June 7, 2006, from Stephen A. Owens, Director, Arizona Department of Environmental Quality, to Wayne Nastri, Regional Administrator, U.S. Environmental Protection Agency, Region IX, "Re: Maintenance of the PM10 NAAQS and Limited Maintenance Plan design values for the Bullhead City PM10 maintenance area  -  2001-2005."
Letter dated June 7, 2007, from Stephen A. Owens, Director, Arizona Department of Environmental Quality, to Wayne Nastri, Regional Administrator, U.S. Environmental Protection Agency, Region IX, "Re: Maintenance of the PM10 NAAQS and Limited Maintenance Plan design values for the Bullhead City PM10 maintenance area  -  2002-2006."
Letter dated July 11, 2008, from Stephen A. Owens, Director, Arizona Department of Environmental Quality, to Wayne Nastri, Regional Administrator, U.S. Environmental Protection Agency, Region IX, "Re: Maintenance of the PM10 NAAQS and Limited Maintenance Plan design values for the Bullhead City PM10 maintenance area  -  2003-2007."
Letter dated July 13, 2009, from Benjamin H. Grumbles, Director, Arizona Department of Environmental Quality, to Ms. Laura Yoshii, Acting Regional Administrator, U.S. Environmental Protection Agency, Region IX, "Re: Maintenance of the PM10 NAAQS and Limited Maintenance Plan design values for the Bullhead City PM10 maintenance area  -  2004-2008."
Letter dated August 29, 2012, from Eric Massey, Director, Air Quality Division, Arizona Department of Environmental Quality, to Jared Blumenfeld, Regional Administrator, U.S. Environmental Protection Agency, Region IX, "Re: 2012 Limited Maintenance Plan Annual Report for the Bullhead City PM10 Maintenance Area."
Sonoma Technology, Inc., State of Arizona Exceptional Event Documentation for the Event of August 19, 2011, for the Bullhead City PM10 Maintenance Area, May 2013.
Sonoma Technology, Inc., State of Arizona Exceptional Event Documentation for the Event of August 15, 2012, for the Bullhead City PM10 Maintenance Area, June 2013.
Letter dated October 8, 2013, from Eric Massey, Director, Air Quality Division, ADEQ, to Jared Blumenfeld, Regional Administrator, U.S. Environmental Protection Agency, Region IX, "Re: 2013 Limited Maintenance Plan Annual Report for the Bullhead City PM10 Maintenance Area."
Letter dated June 23, 2016, from Timothy Franquist, Director, Air Quality Division, ADEQ, to Alexis Strauss, Regional Administrator, U.S. Environmental Protection Agency, Region IX, "Re: CY 2013 Limited Maintenance Plan Annual Report for the Bullhead City PM10 Maintenance Area."
Letter dated June 23, 2016, from Timothy Franquist, Director, Air Quality Division, ADEQ, to Alexis Strauss, Regional Administrator, U.S. Environmental Protection Agency, Region IX, "Re: CY 2014 Limited Maintenance Plan Annual Report for the Bullhead City PM10 Maintenance Area."
Letter dated August 16, 2016, from Timothy Franquist, Director, Air Quality Division, ADEQ, to Alexis Strauss, Regional Administrator, U.S. Environmental Protection Agency, Region IX, "Re: CY 2015 Limited Maintenance Plan Annual Report for the Bullhead City PM10 Maintenance Area."
Letter dated June 23, 2017, from Timothy Franquist, Director, Air Quality Division, ADEQ, to Alexis Strauss, Acting Regional Administrator, U.S. Environmental Protection Agency, Region IX, "Re: CY 2016 Limited Maintenance Plan Annual Report for the Bullhead City PM10 Maintenance Area."
Letter from Timothy S. Franquist, Director, Air Quality Division, ADEQ, to Mike Stoker, Regional Administrator, EPA, Region IX, "Re: CY 2017 Limited Maintenance Plan Annual Report for the Bullhead City PM10 Maintenance Area."
Letter dated August 16, 2019 from Timothy S. Franquist, Director, Air Quality Division, ADEQ, to Mike Stoker, Regional Administrator, EPA, Region IX, "Re: CY 2018 Limited Maintenance Plan Annual Report for the Bullhead City PM10 Maintenance Area."
Letter dated November 19, 2020 from Daniel Czecholinski, Director, Air Quality Division, ADEQ, to John Busterud, Regional Administrator, EPA, Region IX, "Re: CY 2019 Limited Maintenance Plan Annual Report for the Bullhead City PM10 Maintenance Area."
Letter dated October 7, 2021 from Daniel Czecholinski, Director, Air Quality Division, ADEQ, to Deborah Jordan, Acting Regional Administrator, EPA, Region IX, "Re: CY 2020 Limited Maintenance Plan Annual Report for the Bullhead City PM10 Maintenance Area."

Notice of Proposed Rulemaking 
86 FR 56848, Second 10-Year Maintenance Plan for the Indian Wells Valley PM10 Planning Area; California; Proposed rule (October 13, 2021).
Public Comments and Related Documents
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Additional Documents Considered for Final Rulemaking
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Notice of Final Rulemaking
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