1. a) Which are located in any of the following counties: Will, McHenry, Cook, DuPage, Lake, Kane, Madison, St. Claire, Monroe and Macoupin;
2. b) Which use continuous processes to manufacture polystyrene − polybutadiene co-polymer; and
3. c) Which fall within Standard Industrial Classification Group No. 282, Industry No. 2821, except that the manufacture of polystyrene resins need not be the primary manufacturing process at the plant.

The provisions of this Subpart shall apply to polystyrene plants:

(Source: Added at 11 Ill. Reg. 16706, effective September 30, 1987)