The EPA is proposing to approve portions of a State Implementation Plan (SIP) revision submitted by the State of Oregon on December 10, 2010. The action in this Federal Register notice addresses the remaining requirements of the CAA and EPA’s rules that require states to prevent any future and remedy any existing anthropogenic 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”). In this action, the EPA proposes to approve the remaining regional haze SIP elements for which the EPA previously took no action in the July 5, 2011 notice.

DATES: Written comments must be received at the address below on or before June 22, 2012.

http://www.gpo.gov/fdsys/pkg/FR-2012-05-23/pdf/2012-12490.pdf