(A) It shall be unlawful to cause or permit the emission of dense smoke from any fire, chimney, engine, oil burner or any other agency in the Village so as to cause annoyance or discomfort to the residents thereof.
(B) For the purposes of testing and grading the density of smoke, the Ringelmann Smoke Chart, as published and used by the United States Geological Survey, shall be and hereby is adopted as a standard for such grading. Smoke hereby is defined as and declared to be dense when it is of a degree of density of No. 3 on the chart or greater, for more than six minutes in any one hour; whether the period of time is consecutive or not.
('73 Code, § 16-11) Penalty, see § 93.999