Any use established hereafter in an M-2 District shall be so operated as to comply with the performance standards set forth as follows:
(a) Noise. The performance standards governing noise in an M-1 District shall apply.
(b) Smoke and Particulate Matter.
(1) No stack shall emit more than twenty smoke units during any one hour, nor shall smoke of a density in excess of Ringelmann No. 2 be emitted, provided that during fire cleaning periods, each stack may emit four minutes of smoke up to thirty smoke units, twice for blowing soot and twice for cleaning fires, and during such cleaning of fires, smoke of a density of Ringelmann No. 3 may be emitted.
(2) No emission of smoke or particulate matter shall exceed a density of Ringelmann No. 3, except for a plume consisting entirely of condensed steam. For the purpose of grading the density of emission, the Ringelmann Chart published and used by the United States Bureau of Mines shall be employed.
(3) The rate of emission of particulate matter from all sources within the boundaries of any lot shall not exceed a net figure of three pounds per acre of lot area during any one hour.
(4) Dust and other forms of air pollution borne by the wind from such sources as storage areas, yards, roads, et cetera, within lot boundaries shall be kept to a minimum by appropriate landscaping, paving, oiling or other acceptable means. The emission of particulate matter from such sources shall conform with the requirements of subparagraph (3) hereof.
(5) In addition to the performance standards specified herein, the emission of smoke or particulate matter in such manner or quantity as to be detrimental or to endanger the public health, safety, comfort or welfare is hereby declared to be a public nuisance.
(c) Odorous Matter. The emission of odorous matter from any property in such concentrations as to be readily detectable at any point along the boundaries of such property when diluted in the ratio of one volume of odorous air to four or more volumes of clean air, or in such concentrations as to produce a public nuisance or hazard beyond the property boundaries is prohibited.
(d) Vibration. Any process or equipment which produces intense earth-shaking vibrations, such as are created by heavy drop forges or heavy hydraulic surges, shall be set back at least five hundred feet from the property boundaries on all sides, except for a property line adjoining an M-3 District, where such setback shall not be mandatory. However, in no case shall such vibrations be allowed to create a public nuisance or hazard beyond the property boundaries.
(e) Toxic or Noxious Matter. No use on any property shall discharge across the boundaries of such property toxic or noxious matter in such concentrations as to be detrimental to or endanger the public health, safety, comfort or welfare, or cause injury or damage to other property or business.
(f) Glare or Heat. Any operation producing intense glare or heat shall be performed within an enclosure and effectively screened in such a manner as not to create a public nuisance or hazard along property boundaries.
(g) Fire and Explosive Hazards. Fire and explosive hazards shall be controlled as follows:
(1) Activities involving the storage or manufacture of materials or products which decompose by detonation are not permitted in M-2 Districts unless licensed by the City. However, in no case shall such materials or products be stored or manufactured within 200 feet of the boundary of any other district except an M-3 District.
(2) The storage, use or manufacture of materials or products ranging from incombustible to moderate burning as determined by the Zoning Administrator, is permitted.
(3) The storage, use or manufacture of materials or products ranging from free-to-active burning-to intense burning, as determined by the Zoning Administrator, is permitted, provided that within forty feet of the boundary of a residence or business district, the following restrictions shall apply:
A. All storage, use or manufacture of such materials or products shall be within completely enclosed buildings or structures having incombustible exterior walls; and
B. All such buildings or structures shall be protected throughout by an automatic sprinkler system complying with standards for installation prescribed by the National Fire Protection Association.
(4) Materials and products which produce flammable or explosive vapors or gases under ordinary weather temperatures shall not be permitted in this district, with the exception of the following, which are permitted:
A. Materials required for emergency or standby equipment;
B. Materials used in secondary processes which are auxiliary to a principal operation, such as paintspraying of finished products.
C. Flammable liquids and oils stored, sold and used in conjunction with the operation of an automobile service station and customarily required or used in such operation.
(Ord. 10-16-67. Passed 11-20-67. )