1. (1) This subchapter applies to the following facilities:

   1. (a) Nonmetallic mineral processing plants with annual production of less than 8,000,000 tons as a rolling 12-month total.
   2. (b) Concrete batch plants with annual production of less than 1,000,000 cubic yards as a rolling 12-month total.

   3. (c) Asphalt plants that:

      1. (i) combust natural gas, propane, distillate fuel, waste oil, diesel, or biodiesel; and

      2. (ii) have annual production of less than:

         1. (A) 996,000 tons as a rolling 12-month total for drum mix plants; or
         2. (B) 324,000 tons as a rolling 12-month total for batch mix plants.
   4. (d) Engines, such as power generators and other internal combustion engines, associated with any facility described in (a) through (c).
2. (2) An owner or operator of a facility that is not listed in (1) shall comply with the applicable application and permitting requirements of this chapter.

Authorizing statute(s): 75-2-111, 75-2-234, MCA

Implementing statute(s): 75-2-234, MCA

History: NEW, 2019 MAR p. 425, Eff. 4/27/19.