(A)   The emission of smoke or particulate matter in such manner or quantity as to endanger or be detrimental to the public health, safety, comfort or welfare, is declared to be a public nuisance and is unlawful.
   (B)   (1)   For the purpose of grading the density of smoke, the Ringelmann Chart, published and used by the United States Bureau of Mines, shall be employed.
      (2)   The emission of smoke or particulate matter of a density greater than No. 2 on the Ringelmann Chart is prohibited at all times, except as otherwise provided hereinafter.
   (C)   The emission from all sources within any lot area of particulate matter containing more than 10% by weight of particles having particle diameter larger than 44 microns is prohibited.
   (D)   (1)   Dust and other types of air pollution, borne by the wind from such sources as storage areas, yards, roads and the like, within lot boundaries, shall be kept to a minimum by appropriate landscaping, paving, oiling, fencing or other acceptable means.
      (2)   Emission of particulate matter from such sources, in excess of the weight limitation hereinafter specified, is prohibited.
   (E)   (1)   The emission of more than eight smoke units per hour per stack is prohibited, including smoke of a density in excess of Ringelmann No. 2.
      (2)   However, during one one-hour period in each 24-hour day each stack may emit up to sixteen smoke units when blowing soot or cleaning fires.
      (3)   Only during fire-cleaning periods, however, shall smoke of Ringelmann No. 3 be permitted, and then for not more than three minutes.
(Prior Code, § 156.179) (Ord. 610, passed - -1965) Penalty, see § 156.999