§ 52.421. Classification of regions.
49 words·~1 min read·
/us/cfr/t40/s§ 52.421·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
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 [37 FR 10856, May 31, 1972, as amended at 39 FR 16345, May 8, 1974]