(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 a public nuisance and shall not be permitted in the manufacturing districts.
(B) For the purpose of grading the density or equivalent opacity of smoke, the Ringelmann Chart described in the U.S. Bureau of Mines Information Circular 6888 shall be employed. The emission of smoke or particulate matter of a density or equivalent opacity greater than No. 2 on the Ringelmann Chart is prohibited at all times except as otherwise provided in this chapter.
(C) 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, wetting or other acceptable means.
(D) The open burning of refuse, paint, oil, debris and any other combustible material is prohibited in all manufacturing districts.
(E) No operation shall cause or allow to be emitted into the open air from any process or control equipment or to pass any convenient measuring point in a breaching or stack, particulate matter in the gases that exceed 0.60 pounds per 1,000 pounds of gases during any one hour.
(F) 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.
(1) M1 Manufacturing District.
(a) The emission of smoke having a density or equivalent opacity in excess of Ringelmann No. 1 is prohibited. However, for two minutes in any four-hour period, smoke up to and including Ringelmann No. 2 shall be permitted.
(b) The rate of emission of particulate matter from all vents and stacks within the boundaries of any lot shall not exceed one-half stack within the boundaries of any lot shall not exceed one-half pound per acre of lot area per hour.
(2) M2 Manufacturing District.
(a) The emission of smoke having a density or equivalent opacity in excess of Ringelmann No. 2 is prohibited. However, for two minutes in any four-hour period, smoke up to and including Ringelmann No. 3 shall be permitted.
(b) The rate of emission of particulate matter from all stacks and vents within the boundaries of any lot shall not exceed three pounds per acre of lot area per hour.
(Ord. 1999-2, Zoning § 16, subs. .070, passed 2-15-1999)