Citation

80 FR 19538

Canonical document for this Federal Register citation.

Approval and Promulgation of Air Quality Implementation Plans; District of Columbia; Infrastructure Requirements for the 2008 Ozone, 2010 Nitrogen Dioxide, and 2010 Sulfur Dioxide National Ambient Air Quality Standards; Approval of Air Pollution Emergency Episode Plan Monday, April 13, 2015 80 FR 19538