(A) The emission of smoke at any time within the corporate limits of the city of the shade or density greater than number 2 of the Ringelmann chart shall be a violation of this subchapter.
(B) No person who operates or is responsible for the operation of any fuel burning equipment, internal combustion engine, premises, open fire or stack shall cause, suffer or allow to be discharged therefrom, smoke the shade or density of which is equal to or greater than number 2 of the Ringelmann chart for a period aggregating four minutes or more in any 30 minutes; except smoke the shade or density of which is equal to number 2 and not greater than number 3 of the Ringelmann chart may be emitted for a period or periods aggregating three minutes in any 15 minutes for the following reasons only: when building a new fire, cleaning a fire or when breakdown of equipment occurs which makes it evident that the emission was not reasonably preventable.
(C) No person who operates or is responsible for the operation of any locomotive or vehicle shall cause, suffer or allow to be discharged therefrom smoke, the shade or density of which is equal to or greater than number 2 of the Ringelmann chart for a period or periods aggregating more than one minute in any 15 minutes; except smoke the shade or density of which is equal to number 2 and not greater than number 3 of the Ringelmann chart, may be emitted for a period or periods aggregating three minutes in any 15 minutes for the following reasons only: when building a new fire, when cleaning fires or when the breakdown of equipment occurs which makes it evident that the emission was not reasonably preventable.
(Prior Code, § 9-46) Penalty, see § 96.999