8 CAR § 41-803
(a) As used in this subpart:
(1)
(i) Submittal of a draft or partial permit application;
(ii) A prevention of significant deterioration monitoring plan; or
(2) “Regulated new source review pollutant” means the following:
(A)
(b) (b) Sulfur dioxide is a precursor to PM2.5 in all attainment and unclassifiable areas; and
(c) (c) Nitrogen oxides are presumed to be precursors to PM2.5 in all attainment and unclassifiable areas, unless Arkansas demonstrates to the Administrator of the United States Environmental Protection Agency’s satisfaction or the United States Environmental Protection Agency demonstrates that emissions of nitrogen oxides from sources in a specific area are not a significant contributor to that area’s ambient PM2.5 concentrations.
(F)
(b)
(2) Wherever there is a difference between the definitions in 8 CAR § 41-106 and those listed in 40 C.F.R. § 52.21(b) and 40 C.F.R. § 51.301, the federal definitions as listed in 40 C.F.R. § 52.21(b), as adopted in 8 CAR § 41-804 and subdivisions (a)(1), (2), and (3) of this section, and 40 C.F.R. § 51.301 as of October 20, 2010, shall apply.