New affected source
(d) New affected source. The affected source to which the new source provisions of this subpart apply is: (1) Each affected source defined in paragraph (b) of this section that commences construction or reconstruction after December 14, 1998; (2) Each additional group of one or more APPU and associated heat exchange systems that has the potential to emit 10 tons per year or more of any organic HAP or 25 tons per year or more of any combination of organic HAP that commences construction after December 14, 1998; or (3) Each group of one or more process units and associated heat exchange systems that are converted to APPUs after December 14, 1998, that has the potential to emit 10 tons per year or more of any organic HAP or 25 tons per year or more of any combination of organic HAP.