1. a) The cupola was in existence prior to April 15, 1967;
2. b) The cupola process weight rate is less than or equal to 20,000 lbs/hr;

3. c) The cupola as of April 14, 1972, either:

   1. 1) Is in compliance with the following allowable emissions from small foundries covered by this Section:

      Process Weight Rate	Allowable Emission Rate
      lbs/hr	lbs/hr
      1,000	3.05
      2,000	4.70
      3,000	6.35
      4,000	8.00
      5,000	9.58
      6,000	11.30
      7,000	12.90
      8,000	14.30
      9,000	15.50
      10,000	16.65
      12,000	18.70
      16,000	21.60
      18,000	23.40
      20,000	25.10

      (Board Note: For process weight rates not listed, straight line interpolation between two consecutive process weight rates shall be used to determine allowable emission rates.); or

   2. 2) Is in compliance with the terms and conditions of a variance granted by the Pollution Control Board (Board); and construction has commenced on equipment or modifications sufficient to achieve compliance with subsection (c)(1) of this Section.

Sections 212.321 and 212.322 of this Part shall not apply to foundry cupolas if all the following conditions are met:

(Source: Amended at 20 Ill. Reg. 7605, effective May 22, 1996)