A. General Regulations:
1. 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 hereby declared to be a public nuisance and shall not be permitted in any Manufacturing District.
2. 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. 1 on the Ringelmann Chart is prohibited at all times except as otherwise provided hereinafter.
3. 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.
4. The open burning of refuse, paint, oil, debris, and any other combustible material is prohibited in all Industrial Districts.
5. No operation shall result in the emission into the open air from any process or control equipment, or in the measurement at any convenient measuring point in a breeching or stack of particulate matter in the gases that exceeds 0.60 pound per thousand pounds of gases during any one hour.
6. 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.
B. M-1 Industrial District: The following regulations apply in the M-1 Industrial District:
1. The emission of smoke having a density or equivalent opacity in excess of Ringelmann no. 1 is prohibited. However, for two (2) minutes in any four-hour period, smoke up to and including Ringelmann no. 2 shall be permitted.
2. The rate of emission of particulate matter from all vents and stacks within the boundaries of any lot shall not exceed 0.2 pound per acre of lot area during any one hour.
C. M-2 Industrial District: The following regulations apply in the M-2 Industrial District:
1. The emission of smoke having a density or equivalent opacity in excess of Ringelmann no. 2 is prohibited. However, for two (2) minutes in any four-hour period, smoke up to and including Ringelmann no. 3 shall be permitted.
2. 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 during any one hour. (Ord., 5-7-1973)