The EPA is partially approving and partially disapproving a revision to the Arkansas State Implementation Plan (SIP) intended to address the regional haze (RH) requirements of the Clean Air Act (CAA or Act). In addition, EPA is partially approving and partially disapproving the portion of the Arkansas Interstate Transport SIP submittal that addresses the visibility requirement of section 110(a)(2)(D)(i)(II) for the 1997 8-hour ozone and 1997 fine particulate matter (PM<INF>2.5</INF>) national ambient air quality standards (NAAQS) that the Arkansas SIP contain adequate provisions to prohibit emissions from interfering with measures required in another state to protect visibility. EPA is approving certain core elements of the RH SIP including: identification of affected Class ...
EPA is partially approving and partially disapproving a revision to the North Dakota State Implementation Plan (SIP) addressing regional haze submitted by the Governor of North Dakota on March 3, 2010, along with SIP Supplement No. 1 submitted on July 27, 2010, and part of SIP Amendment No. 1 submitted on July 28, 2011. These SIP revisions were submitted to address the requirements of the Clean Air Act (CAA or Act) and our rules that require states to prevent any future and remedy any existing man-made impairment of visibility in mandatory Class I areas caused by emissions of air pollutants from numerous sources located over a wide geographic area (also referred to as the ``regional haze program''). EPA is promulgating a Federal Implementation Plan (FIP) to address the gaps in the plan ...
The EPA is proposing to approve revisions to the State Implementation Plan (SIP) for the City of Albuquerque-Bernalillo County, New Mexico submitted by the Governor of New Mexico on July 28, 2011 addressing the regional haze requirements for the mandatory Class I areas under 40 CFR 51.309. The EPA is proposing to find that these revisions and associated rules meet the requirements of the Clean Air Act (CAA) and comply with the provisions of 40 CFR 51.309, thereby meeting requirements for reasonable progress for the 16 Class I areas covered by the Grand Canyon Visibility Transport Commission Report for approval of the plan through 2018. We are proposing to approve SIP submissions offered as companion rules to the Section 309 regional haze plan, specifically, rules for the Sulfur Dioxide ...
We are adopting a new airworthiness directive (AD) for certain Model ATR42 and ATR72 airplanes. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
We are superseding an existing airworthiness directive (AD) for certain Sicma Aero Seat Model 9401, 9402, 9404, 9505, 9406, 9407, 9408, and 9409 series passenger seat assemblies, installed on, but not limited to, ATR--GIE Avions de Transport R[eacute]gional Model ATR42 and ATR72 airplanes. That AD currently requires repetitive detailed inspections for cracking of the central and lateral spreaders of the affected seats, and repair or replacement of the spreader if necessary. This AD was prompted by a determination that the existing AD included Model 9505 series passenger seat assemblies in the applicability instead of Model 9405 series passenger seat assemblies. We are issuing this AD to detect and correct cracking of the central and lateral spreaders, which could lead to further crackin...
On October 17, 2011, EPA published in the Federal Register a proposed rule proposing to partially approve and partially disapprove the Arkansas Regional Haze (RH) State Implementation Plan (SIP) and to partially approve and partially disapprove Arkansas' Interstate Transport SIP to address pollution affecting visibility, and requested comment by November 16, 2011. EPA is extending the public comment period for the proposed rule until December 22, 2011.
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