- (a) Ambient air increments. Increases in pollutant concentration over the baseline concentration in Class I, II, or III areas shall be limited to those listed in OAC 252:100-3-4 regarding significant deterioration increments.
(b) Ambient air ceilings. No concentration of a pollutant shall exceed whichever of the following concentrations is lowest for the pollutant for a period of exposure:
- (1) the concentration allowed under the secondary NAAQS, or
- (2) the concentration permitted under the primary NAAQS.
Added at 23 Ok Reg 1699, eff 6-15-06