Approval and Promulgation of Air Quality Implementation Plans; Michigan; Determination of Attainment of the 1997 Annual Fine Particle Standard for the Detroit-Ann Arbor Nonattainment Area
air-emissions · Rule · Published 2012-11-06 · Effective 2012-12-06 · MI · 77 FR 66545
Document
Document number
2012-26957
Federal Register citation
77 FR 66545
CFR reference
40 CFR 52
Type
Rule
Action
Final rule.
Category
air-emissions
Publication date
2012-11-06
Effective date
2012-12-06
State
MI
EPA docket
EPA-R05-OAR-2012-0467
Abstract
EPA is making two final determinations under the Clean Air Act (Act) regarding the 1997 annual fine particle (PM<INF>2.5</INF>) nonattainment area of Detroit-Ann Arbor, Michigan (Livingston, Macomb, Monroe, Oakland, St. Clair, Washtenaw, and Wayne Counties) (Detroit-Ann Arbor area or area). First, EPA is determining that the Detroit-Ann Arbor area has attained the 1997 annual PM<INF>2.5</INF> National Ambient Air Quality Standard (NAAQS). EPA made this determination of attainment based upon complete, quality-assured, and certified ambient air monitoring data for 2009-2011, showing that the area has monitored attainment of the 1997 annual PM<INF>2.5</INF> NAAQS. Preliminary data available for 2012 indicate continued attainment. Pursuant to EPA rule, this determination suspends the requirements for the Detroit-Ann Arbor area to submit an attainment demonstration, associated reasonably available control measures (RACM) to include reasonably available control technology (RACT), a reasonable further progress (RFP) plan, contingency measures, and other planning State Implementation Plan (SIP) revisions related to attainment of the 1997 annual PM<INF>2.5</INF> NAAQS so long as the area continues to attain the PM<INF>2.5</INF> NAAQS. EPA is also determining, based on complete, quality-assured and certified monitoring data for the 2007-2010 monitoring period, that the Detroit-Ann Arbor area had attained the 1997 annual PM<INF>2.5</INF> NAAQS by the its attainment date of April 5, 2010.