The Alaska plan was evaluated on the basis of the following classifications: ----------------------------------------------------------------------------------------------------------------
Pollutant
-----------------------------------------------------
Air quality control Region Particulate Sulfur Nitrogen Carbon
matter oxides dioxide monoxide Ozone----------------------------------------------------------------------------------------------------------------Cook Inlet Intrastate..................................... I III III I III.Northern Alaska Intrastate................................ I III III I III.South Central Alaska Intrastate........................... III III III III III.Southeastern Alaska Intrastate............................ III III III III III.---------------------------------------------------------------------------------------------------------------- [37 FR 10848, May 31, 1972, as amended at 48 FR 30625, July 5, 1983]