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Partial Approval and Partial Disapproval of Air Quality Implementation Plans; Arizona; West Pinal County; 1987 PM10
The Environmental Protection Agency (EPA) is proposing to approve in part and to disapprove in part the state implementation plan (SIP) revision submitted by the State of Arizona to meet Clean Air Act (CAA or ``Act'') requirements for the 1987 PM<INF>10</INF> national ambient air quality standards (NAAQS or ``standard'') in the West Pinal County...
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Air Plan Approval; Arizona; Stationary Sources; New Source Review Updates
The Environmental Protection Agency (EPA) is proposing to approve revisions to the Arizona Department of Environmental Quality's (ADEQ) portion of the Arizona State Implementation Plan (SIP). These revisions are primarily intended to make corrections to the ADEQ's SIP- approved rules for the issuance of New Source Review (NSR) permits for...
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Air Plan Approval; Missouri; Removal of Kansas City, Missouri Reid Vapor Pressure Requirement
The Environmental Protection Agency (EPA) is proposing approval of revision to the Missouri State Implementation Plan (SIP), submitted by the Missouri Department of Natural Resources (MoDNR) on September 15, 2020. The proposed revision removes the Kansas City, Missouri low Reid Vapor Pressure (RVP) requirement which required gasoline sold in the...
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Approval and Promulgation of Air Quality State Implementation Plans; California; Plumas County; Moderate Area Plan for the 2012 PM2.5
The Environmental Protection Agency (EPA) is proposing to approve through parallel processing a state implementation plan (SIP) revision submitted by the State of California to address Clean Air Act (CAA or ``Act'') requirements for the 2012 annual fine particulate matter (PM<INF>2.5</INF>) national ambient air quality standard (NAAQS or...
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Approval and Promulgation of Implementation Plans; State of Utah; Salt Lake City and Provo, Utah PM2.5
The Environmental Protection Agency (EPA) is proposing the redesignation of the Salt Lake City, Utah and Provo, Utah nonattainment areas (NAAs) to attainment for the 2006 24-hour fine particulate matter with an aerodynamic diameter less than or equal to a nominal 2.5 microns (PM<INF>2.5</INF>) National Ambient Air Quality Standard (NAAQS), and...
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Air Plan Approval; Washington: Inspection and Maintenance Program
The Environmental Protection Agency (EPA) proposes to approve revisions to the Washington State Implementation Plan (SIP) submitted by the State of Washington on June 2, 2019, through the Washington Department of Ecology. The proposed revision, applicable in Clark, King, Pierce, Snohomish, and Spokane Counties, Washington, removes the Inspection...
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Revised Cross-State Air Pollution Rule Update for the 2008 Ozone NAAQS
This proposed action is taken in response to the United States Court of Appeals for the District of Columbia Circuit's (D.C. Circuit) remand of the Cross-State Air Pollution Rule (CSAPR) Update in Wisconsin v. EPA on September 13, 2019. The CSAPR Update finalized Federal Implementation Plans (FIPs) for 22 states to address their interstate...
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Air Plan Approval; Texas; Interstate Visibility Transport
Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is proposing to disapprove elements of two State Implementation Plan (SIP) submissions from the State of Texas for the 2012 PM<INF>2.5</INF> National Ambient Air Quality Standard (NAAQS) and the 2015 Ozone NAAQS. These submittals address how the...
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Air Plan Approval; KY; Updates to Attainment Status Designations
The Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision submitted by the Commonwealth of Kentucky, through the Kentucky Division for Air Quality (KDAQ), on December 9, 2019. The SIP revision updates the description and attainment status designations of geographic areas within the Commonwealth...
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Air Plan Approval; North Carolina; Revisions to Construction and Operation Permits
The Environmental Protection Agency (EPA) is proposing to approve a revision to the North Carolina State Implementation Plan (SIP) submitted by the State of North Carolina through the North Carolina Department of Environmental Quality, Division of Air Quality (DAQ), on July 10, 2019. The SIP revision seeks to modify the State's construction and...
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Air Plan Approval; North Carolina: Permits Requiring Public Participation
The Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision submitted by the State of North Carolina, through the North Carolina Department of Environmental Quality (NCDEQ), Division of Air Quality, on July 10, 2019. This SIP revision seeks to modify the State's permitting program public...
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Approval and Promulgation of Implementation Plans; Colorado; Revisions to Regulation Number 7 and RACT Requirements for 2008 8-Hour Ozone Standard for the Denver Metro/North Front Range Nonattainment Area
The Environmental Protection Agency (EPA) is proposing approval and conditional approval of State Implementation Plan (SIP) revisions submitted by the State of Colorado on May 31, 2017, May 14, 2018, and May 10, 2019. The revisions are to Colorado Air Quality Control Commission (Commission or AQCC) Regulation Number 7 (Reg. 7). The revisions to...
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Air Plan Approval; ID; 2010 Sulfur Dioxide NAAQS Infrastructure Requirements
The Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) submission from the State of Idaho (Idaho or the State) that addresses the Clean Air Act (CAA or Act) interstate transport requirements for the 2010 1-hour Sulfur Dioxide (SO<INF>2</INF>) National Ambient Air Quality Standards (NAAQS). In this...
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Air Quality Implementation Plan; California; Northern Sierra Air Quality Management District; Stationary Source Permits
The Environmental Protection Agency (EPA) is proposing to approve a revision to the Northern Sierra Air Quality Management District (NSAQMD or ``District'') portion of the California State Implementation Plan (SIP). In this action, we are proposing to approve a rule submitted by the NSAQMD that governs the issuance of permits for stationary...
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Air Plan Approval; ID, Incorporation by Reference Updates and Rule Revisions
The Environmental Protection Agency (EPA) proposes to approve State Implementation Plan (SIP) revisions submitted by Idaho on June 5, 2019 and May 27, 2020. The submitted revisions update the incorporation by reference of specific Federal requirements and clarify source permitting requirements. The EPA proposes to find that the changes are...
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Air Plan Approval; California; South Coast Air Quality Management District; Ventura County Air Pollution Control District
The Environmental Protection Agency (EPA) is proposing to approve revisions to the South Coast Air Quality Management District (SCAQMD) and the Ventura County Air Pollution Control District (VCAPCD) portions of the California State Implementation Plan (SIP). These revisions concern emissions of volatile organic compounds (VOCs) from the use and...
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Air Plan Approval; WA; Infrastructure Requirements for the 2010 Sulfur Dioxide and 2015 Ozone Standards; Availability of Supplemental Information and Reopening of the Comment Period
Whenever a new or revised National Ambient Air Quality Standard (NAAQS) is promulgated, the Clean Air Act (CAA) requires states to submit a plan for the implementation, maintenance, and enforcement of the standard, commonly referred to as infrastructure requirements. On May 26, 2020, the Environmental Protection Agency (EPA) published a notice...
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Review of the Ozone National Ambient Air Quality Standards
Based on the Environmental Protection Agency's (EPA's) review of the air quality criteria and the national ambient air quality standards (NAAQS) for photochemical oxidants including ozone (O<INF>3</INF>), the EPA is proposing to retain the current standards, without revision.
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Air Plan Approval; MS; BART SIP and Regional Haze Progress Report
The Environmental Protection Agency (EPA) is proposing to approve, through parallel processing, a draft Mississippi State Implementation Plan (SIP) revision, submitted through a letter dated April 23, 2020, addressing best available retrofit technology (BART) determinations for 14 electric generating units (EGUs) (``draft BART SIP''). These EGUs...
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Air Plan Approval; New Hampshire; Infrastructure State Implementation Plan Requirements for the 2015 Ozone and 2012 PM2.5
The Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision submitted by the State of New Hampshire. This revision addresses the infrastructure requirements of the Clean Air Act (CAA or Act) for the 2015 ozone National Ambient Air Quality Standards (NAAQS). This proposed action includes all...