“Prevention of Significant Deterioration (PSD)” means the program under title I of the Act that limits emissions increases in areas where NAAQS are already met.

Source. #6057-A, eff 6-30-95; renumbered by #8256 (from Env-A 101.213), (see Revision Note #1 at chapter heading); renumbered by #8304 (see Revision Note #2 at chapter heading); renumbered by #9839 (from Env-A 101.147), (see Revision Note #3 at chapter heading); ss by #13105, eff 9-25-20 (formerly Env-A 101.149) (see Revision Note #4 at chapter heading for Env-A 100)