The Pennsylvania plan was evaluated on the basis of the following classifications: ----------------------------------------------------------------------------------------------------------------
Pollutant
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Air quality control region Particulate Sulfur Nitrogen Carbon Ozone
matter oxides dioxide monoxide (hydrocarbons)----------------------------------------------------------------------------------------------------------------Metropolitan Philadelphia Interstate................. I I III I INortheast Pennsylvania-Upper Delaware Valley I II III III III
Interstate..........................................South Central Pennsylvania Intrastate................ I II III III IIICentral Pennsylvania Intrastate...................... I III III III IIISouthwest Pennsylvania Intrastate.................... I I III I INorthwest Pennsylvania-Youngstown Interstate......... I II III III III---------------------------------------------------------------------------------------------------------------- [37 FR 10889, May 31, 1972, as amended at 39 FR 16347, May 8, 1974; 45 FR 33627, May 20, 1980] Sec. 52.2022 [Reserved]