The Maryland plans were evaluated on the basis of the following classifications: ----------------------------------------------------------------------------------------------------------------
Pollutant
-----------------------------------------------------
Air quality control region Particulate Sulfur Nitrogen Carbon
matter oxides dioxide monoxide Ozone----------------------------------------------------------------------------------------------------------------Cumberland-Keyser Interstate.............................. I I III III IIICentral Maryland Intrastate............................... II II III III IIIMetropolitan Baltimore Intrastate......................... I I I I INational Capital Interstate............................... I I III I ISouthern Maryland Intrastate.............................. III III III III IIIEastern Shore Intrastate.................................. II III III III III---------------------------------------------------------------------------------------------------------------- [37 FR 10870, May 31, 1972, as amended at 39 FR 16346, May 8, 1974; 45 FR 53475, Aug. 12, 1980] Sec. 52.1072 [Reserved]