(A) For the purpose of grading the density of equivalent capacity of smoke, the Ringelmann Chart described in the U.S. Bureau of Mines Information Circular 7718 shall be employed. The emission of smoke or particulate matter of a density of equivalent greater than No. 1 on the Ringelmann Chart is prohibited at all times except as otherwise provided hereinafter.
(B) Dust and other types of air pollution borne by the wind from such sources as storage areas, yards, roads and the like within like lot boundaries shall be kept to a minimum by appropriate landscaping, paving, oiling, fencing, wetting or other acceptable means. The open burning of refuse, paint, oil, debris and any other combustible material is prohibited in all industrial districts.
(C) Particulate matter loadings in pounds per acre described below shall be determined by selecting a continuous four-hour period which will result in the highest average emission rate.
(D) The emission of smoke having a density or equivalent opacity in excess of Ringelmann No. 1 is prohibited; however, for two minutes in any 60-minute period, smoke up to and including Ringelmann No. 2 shall be permitted.
(E) The rate of emission of particulate matter from all stacks and vents within the boundaries of any lot shall not exceed one pound per acre of lot area per hour.
(1983 Code, § 9-9-3) (Ord. 09-07, passed 9-8-2009)