(a) Terms used in this article shall have the following meanings:
(1) Nonstationary Source: Any and all nonstationary sources of smoke emissions whether privately or publicly owned or operated. Without limiting the generality of the foregoing, this term includes automobiles, trucks, tractors, buses and other motor vehicles, railroad locomotives and all portable fuel burning equipment.
(2) Ringelmann Chart: The chart published and described in the U.S. bureau of mines information circular 8333 dated May 1967, and on which are illustrated the graduated shades of gray to black for use in estimating the density of smoke.
(3) Smoke: Small gasborne particles resulting from incomplete combustion consisting predominantly of carbon and other combustible materials and present in sufficient quantity to be observable independently of the presence of other solids.
(4) Stationary Source: Any and all stationary sources of smoke emissions, whether privately or publicly owned or operated. Without limiting the generality of the foregoing, this term includes all types of business, commercial and industrial plants, works, shops and stores and heating power plants and stations, buildings and structures of all types, including single- and multiple-family residences, apartment houses, garages, office buildings, hotels, restaurants, schools, hospitals, churches and other industrial or institutional buildings, incinerators of all types both indoor and outdoor and all stacks and other chimney outlets from any of the foregoing. (M.C. 1963, § 18.413; amd. Ord. 0-70-32)