[Code of Federal Regulations] [Title 40, Volume 3] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR52.51] [Page 88] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 52--APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS--Table of Contents Subpart B--Alabama Sec. 52.51 Classification of regions. The Alabama plan was evaluated on the basis of the following classifications: ---------------------------------------------------------------------------------------------------------------- Pollutant ---------------------------------------------------------- Air quality control region Photochemical Particulate Sulfur Nitrogen Carbon oxidants matter oxides dioxide monoxide (hydrocarbons) ---------------------------------------------------------------------------------------------------------------- Alabama & Tombigbee Rivers Intrastate................ II III III III III Columbus (Georgia)-Phenix City (Alabama) Interstate.. I III III III III East Alabama Intrastate.............................. I III III III III Metropolitan Birmingham Intrastate................... I II III I I Mobile (Alabama)-Pensacola-Panama City (Florida)- I I III III I Southern Mississippi Interstate..................... Southeast Alabama Intrastate......................... II III III III III Tennessee River Valley (Alabama)-Cumberland Mountains I I III III III (Tennessee) Interstate.............................. ---------------------------------------------------------------------------------------------------------------- [37 FR 10847, May 31, 1972]