Approval and Promulgation of Implementation Plans; State of Utah; Salt Lake County, Utah County, and Ogden City PM10 Redesignation to Attainment, Designation of Areas for Air Quality Planning Purposes and State Implementation Plan Revisions

摘要

The Environmental Protection Agency (EPA) is proposing to approve State Implementation Plan (SIP) revisions submitted by the State of Utah on January 4, 2016, which include revisions to Utah's Division of Administrative Rule (DAR) R307-110-10 and maintenance plans for the Salt Lake County, Utah County, and Ogden City nonattainment areas (NAAs) for particulate matter with an aerodynamic diameter less than or equal to a nominal 10 microns (PM 10 ), and on March 6, 2019, which include PM 10 redesignation requests and supplemental information for Salt Lake County, Utah County and Ogden City. These submittals demonstrate that the Salt Lake County, Utah County and Ogden City areas have attained the PM 10 National Ambient Air Quality Standards (NAAQS), request redesignation to attainment and include maintenance plans for the areas demonstrating attainment for fifteen years. Also, the EPA is proposing approval of Utah's February 27, 2017 submittal, which includes rule revisions to address our October 19, 2016 conditional approval of Utah's DAR R307- 302 revisions that were submitted May 9, 2013, May 20, 2014, and September 8, 2015. Additionally, the EPA is proposing to approve SIP revision