Classification of regions.

§ 52.421 Classification of regions.

The Delaware plan was evaluated on the basis of the following classifications:

Air quality control region Pollutant
Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Photochemical oxidants (hydrocarbons)
Metropolitan Philadelphia InterstateIIIIIII
Southern Delaware IntrastateIIIIIIIIIIIIIII
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