Citation

77 FR 73560

Canonical document for this Federal Register citation.

Approval and Promulgation of Air Quality Implementation Plans; West Virginia; Redesignation of the West Virginia Portion of the Parkersburg-Marietta, WV-OH 1997 Annual Fine Particulate Matter (PM2.5) Nonattainment Area to Attainment and Approval of the Associated Maintenance Plan Tuesday, December 11, 2012 77 FR 73560