1147.06 PERFORMANCE STANDARDS.
   Any use established hereafter in an M-3 District shall be operated so 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 thirty smoke units during 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 of a density of Ringelmann No. 3, and eight minutes of smoke of a density of Ringelmann No. 2, and during soot blowing periods, eight minutes of smoke of a density of Ringelmann No. 2.
      (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 eight 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 and so forth, within lot boundaries shall be kept to a minimum by appropriate landscaping, paving, oiling or other acceptable means.
      (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 to or 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 create a public nuisance or hazard beyond the boundaries of such property 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 500 feet from the boundary of any residence, business, M-1 or M-2 District unless such process or equipment is so controlled as to prevent the transmission beyond the district boundary of earth-shaking vibrations perceptible without the aid of instruments. However, in no case shall such vibrations be allowed to create a public nuisance or hazard beyond the property line.
   (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)    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 an M-3 District 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 unless otherwise authorized.
      (2)    The storage, use or manufacture of materials or products ranging from incombustible to fast burning, as determined by the Zoning Administrator, or which produce flammable or explosive vapors or gases under ordinary weather temperature is permitted. However, within 600 feet of the boundary of any other zoning district, the storage, use or manufacture of materials or products which produce flammable or explosive vapors or gases under ordinary weather temperature is not permitted with the exception of the following, which are permitted within 600 feet.
         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 a motor vehicle service station and customarily required or used in such operation.    
            (Ord. 10-16-67. Passed 11-20-67.)