ARSD 74:36:01:10. Modification defined

Modification is a physical change in or change in the method of operation of a source that results in at least one of the following: (1) An increase in the amount of an air pollutant emitted by that source or in the emission of an air pollutant not previously emitted, except for an insignificant increase in allowable emissions as specified in § 74:36:01:10.01; (2) A significant change to existing monitoring, reporting, or record keeping requirements in the permit; (3) The change requires or changes a case-by-case determination of an emission limit or other standard, a source-specific determination for temporary sources of ambient impacts, or a visibility or increment analysis; or (4) The change seeks to establish or change a permit term or condition for which there is a corresponding underlying applicable requirement that the source has assumed to avoid an applicable requirement, a federally enforceable emissions cap assumed to avoid classification as a modification under any provision of Title I, or an alternative emissions limit approved pursuant to regulations promulgated under § 112(i)(5) of the Clean Air Act.