Page 427 - Fundamentals of Air Pollution 3E

V. Air Quality Standards 379

TABLE 22-8
U.S. Federal PSD Concentration Increments
Increment
3
Pollutant OxgnT )
Class I areas"
Particulate matter
TSP, annual geometric mean 5
TSP, 24-hr maximum 10
Sulfur dioxide
Annual arithmetic mean 2
24-hr maximum 5
3-hr maximum 25
Nitrogen dioxide
Annual arithmetic mean 2.5
Class II areas' 1
Particulate matter
TSP, annual geometric mean 19
TSP, 24-hr maximum 37
Sulfur dioxide
Annual arithmetic mean 20
24-hr maximum 91
3- hr maximum 512
Nitrogen dioxide
Annual arithmetic mean 25
Class III areas c
Particulate matter
TSP, annual geometric mean 37
TSP, 24-hr maximum 75
Sulfur dioxide
Annual arithmetic mean 40
24-hr maximum 182
3-hr maximum 700
Nitrogen dioxide
Annual arithmetic mean 50
* Class I areas are pristine, e.g., national parks,
national seashores, natural wilderness areas.
b
Class II areas where moderate deterioration is
allowed. (Unless otherwise designated, all areas
are Class II.)
c
Class III areas are specifically designated as heavy
industrial.
Source: 40 CFR § 51.166, July 1992.