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
Rulemakings
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).
77 FR 32024, Designation of Areas for Air Quality Planning Purposes; State of Arizona; Pinal County; PM10, Final rule (May 31, 2012).
85 FR 37756, Finding of Failure to Attain the 1987 24-Hour PM10 Standard; Reclassification as Serious Nonattainment; Pinal County, Arizona, Final rule (June 24, 2020).
86 FR 1347, Partial Approval and Partial Disapproval of Air Quality Implementation Plans; Arizona; West Pinal County; 1987 PM10 Nonattainment Area Requirements, Proposed rule (January 8, 2021).
86 FR 38928, Finding of Failure to Submit a State Implementation Plan to Meet the 1987 24-Hour PM10 Standard; Moderate Area Requirements; West Pinal County; Arizona, Final rule (July 23, 2021).
 Technical Support Documents, Memoranda to File, and Data Analysis Documents
Letter dated November 30, 2022, from Elizabeth J. Adams, Director, Air and Radiation Division, EPA Region IX, to Misael Cabrera, Director, ADEQ, Subject: "Completeness Finding for State Implementation Plan (SIP) Submission for West Pinal County for the 1987 PM10 National Ambient Air Quality Standards (NAAQS) and Termination of Clean Air Act (CAA) Sanctions Clocks."
Letter dated October 26, 2020, from Gwen Yoshimura, Manager, Air Quality Analysis Office, EPA Region IX, to Michael Sundblom, Director, Pinal County Air Quality Control District, with enclosure.
Letter dated October 27, 2021, from Gwen Yoshimura, Manager, Air Quality Analysis Office, EPA Region IX, to Michael Sundblom, Director, Pinal County Air Quality Control District, with enclosure.
Letter dated October 28, 2022, from Gwen Yoshimura, Manager, Air Quality Analysis Office, EPA Region IX, to Michael Sundblom, Director, Pinal County Air Quality Control District, with enclosure.
EPA Region IX, Technical Systems Audit of the Ambient Air Monitoring Program: Pinal County Air Quality Control District, April 1 - 3, 2019 (Final Report dated September 2019).
EPA AQS Design Value Report, AMP 480, dated January 5, 2023. (User ID: JCARLSTAD, Report Request ID: 2069517).
Map of Federally-Recognized Tribes in EPA's Pacific Southwest (Region IX) (also available at https://www.epa.gov/tribal-pacific-sw/map-federally-recognized-tribes-epas-pacific-southwest-region-9).
    
State Plans, Rules, Support Documents, Reports, and Correspondence
 Letter dated May 17, 2021, from Daniel Czecholinski, Director, Air Quality Division, ADEQ, to Deborah Jordan, Acting Regional Administrator, EPA Region IX, Subject: "RE: Withdrawal from EPA Consideration of the 2015 Arizona State Implementation Plan Revision: West Pinal County PM10 Nonattainment Area."
West Pinal PM10 Plan, Appendix E, Exhibit 2, Resolution to Adopt the 2022 Serious Area Particulate Plan for PM-10 for the West Pinal County Nonattainment Area.
Letter dated May 31, 2022, from Daniel Czecholinski, Director, Air Quality Division, ADEQ, to Martha Guzman, Regional Administrator, EPA Region IX, Subject: "Arizona State Implementation Plan Revision, Maricopa Association of Governments 2022 Serious Area Particulate Plan for PM-10 for the West Pinal County Nonattainment Area."
Pinal County Air Quality Control District, 2020 Ambient Monitoring Network Plan and 2019 Data Summary.
Pinal County Air Quality Control District, 2021 Ambient Monitoring Network Plan and 2020 Data Summary.
Pinal County Air Quality Control District, 2022 Ambient Monitoring Network Plan and 2021 Data Summary.
Letter dated April 26, 2021, from Josh DeZeeuw, Air Quality Manager, Pinal County Air Quality Control District, to Gwen Yoshimura, EPA Region IX, Subject: "RE: AQS Data Certification  -  2020," with enclosure.
Letter dated April 26, 2022, from Josh DeZeeuw, Air Quality Manager, Pinal County Air Quality Control District, to Gwen Yoshimura, EPA Region IX, Subject: "RE: AQS Data Certification  -  2021," with enclosure.
Notice of Proposed Rulemaking 
88 FR 9812, Finding of Failure to Attain the 1987 24-Hour PM10 Standards; Pinal County, Arizona, Proposed rule (February 15, 2023).
Public Comments and Related Documents
Comment submitted March 17, 2023, from Sierra Club to docket number EPA-R09-OAR-2023-0035, with attached letter dated March 17, 2023, from Sandy Bahr, Chapter Director, Sierra Club  -  Grand Canyon Chapter, to Ashley Graham, Air Planning Office (AIR-2), EPA Region IX.
Comment submitted March 17, 2023, from Dan Blackson, to docket number EPA-R09-OAR-2023-0035.
Additional Documents Considered for Final Rulemaking
Letter dated May 4, 2023, from Elizabeth Adams, Director, Air and Radiation Division, EPA Region IX, to Scott DiBiase, Interim Director, Pinal County Air Quality Control District, with enclosure: EPA Region IX, Technical Systems Audit of the Ambient Air Monitoring Program: Pinal County Air Quality Control District, September 13 - 15, 2022 (Final Report dated May 2023).
Letter dated April 27, 2023, from Josh DeZeeuw, Air Quality Manager, Pinal County Air Quality Control District, to Dena Vallano, EPA Region IX, Subject: "RE: AQS Data Certification  -  2022," with enclosure.
EPA AQS Design Value Report, AMP 480, dated May 23, 2023. (User ID: JCARLSTAD, Report Request ID: 2107794).
EPA Region IX, "Federally-Recognized Tribes in EPA's Pacific Southwest (Region 9)".
Notice of Final Rulemaking
88 FR 47026, Finding of Failure to Attain the 1987 24-Hour PM10 Standards; Pinal County, Arizona, Final rule (July 21, 2023).
       
