712.1 The emission of a waste gas steam from an ethylene producing plant, or source utilizing ethylene as a raw material, into the atmosphere in excess of twenty (20) pounds per twenty-four (24) hour period shall be prohibited, unless the waste gas stream is properly burned at one thousand three hundred degrees Fahrenheit (1,300° F.) for three tenths (0.3) of a second or longer in a direct-flame after burner, or is removed by a method of comparable efficiency approved by the Mayor.

SOURCE: Section 3 of the District of Columbia Air Pollution Control Act of 1984, D.C. Law 5-165, § 712, 32 DCR 565, 642 (February 1, 1985).