(A) Uses defined. The industrial uses defined below, including accessory buildings and uses, are permitted in the districts indicated in Appendices E and F which follow this chapter in accordance with the requirements of this section.
(1) "LIGHT INDUSTRIAL USE." One which is conducted entirely within enclosed, substantially constructed buildings and includes warehousing; does not use the open area around those buildings for storage of raw materials, manufactured products, or for any other industrial purpose, other than loading and unloading operations; and provided the use conforms to the following performance standards.
(a) Smoke. No smoke is emitted of a density greater than No. l according to the Ringelmann's Scale, except that smoke of a density not in excess of No. 2 of Ringelmann's Scale shall be permitted for a period not in excess of six minutes in any hour.
(b) Fly ash. No particles from any flue or smokestack shall exceed 0.2 grains per cubic foot of flue gas at a stack temperature of 500°F.
(c) Dust. No dust of any kind produced by the industrial operations shall be permitted to escape beyond the confines of the building in which it is produced.
(d) Odor. No noxious odor of any kind shall be permitted to extend beyond the lot lines.
(e) Gases and fumes. No gases or fumes, toxic to persons or injurious to property, shall be permitted to escape beyond the building in which they occur.
(f) Vibration. No intense earth shaking vibration shall be created or maintained by any industry beyond the boundary lines of the tract on which it is located.
(g) Noise and sound. A maximum of 70 decibels at the property line is permitted. Noise is required to be muffled so as not to become objectionable due to intermittence, beat frequency, or shrillness. Sound may equal but not exceed street traffic noise in the vicinity during a normal day shift work period.
(2) "GENERAL INDUSTRIAL USE." One which requires both buildings and open area for manufacturing, fabricating, processing, extraction, heavy repairing, dismantling, storage or disposal of equipment, raw materials, manufactured products, or wastes, and provided the use conforms to the following performance standards:
(a) Smoke. No smoke is emitted of a density greater than No. 2 according to the Ringelmann's Scale, except that smoke of a greater density shall be permitted for a period of not in excess of six minutes in any one hour.
(b) Fly ash. No particles from any flue or smokestack shall exceed 0.3 grains per cubic foot of flue gas at a stack temperature of 500°F.
(c) Dust. No dust of any kind produced by the indus-trial operations shall be permitted to escape beyond the limits of the property being used.
(d) Odor. No noxious odor of any kind shall be permitted to extend beyond the lot lines.
(e) Gases and fumes. No gases or fumes toxic to persons or injurious to property shall be permitted to escape beyond the building in which they occur.
(f) Vibration. No intense earth shaking vibration shall be created or maintained by any industry beyond the boundary lines of the tract on which it is located.
(g) Noise and sound. A maximum of 70 decibels at the property line is permitted. Noise is required to be muffled so as not to become objectionable due to intermittence, beat frequency, or shrillness. Sound may equal but not exceed street traffic noise in the vicinity during a normal day shift work period.
(B) Parking spaces. Each industrial use shall provide parking space for each three employees thereof located on the same lot as the use, or within 300 feet on a site approved by the Board of Zoning Appeals.
(C) Loading and unloading berths. Each industrial use shall provide loading and unloading berths located on the same lot as the use, as specified in Appendix F following this chapter.
(D) Signs. For provisions concerning signs in IR districts, see§ 152.30.
(E) Provisions and exceptions to industrial uses.
(1) Parking requirements may be waived by the Board where 50% or more of the area in a block was occupied by business or industrial structures at the time of passage of this chapter.
(2) Groups of uses requiring parking space may join in establishing group parking areas with capacity aggregating that required for each participating use.
(3) Open parking area and loading and unloading berths shall be paved with a dustproof or hard surface.
(4) One-half of an alley abutting the rear of a lot may be included in the rear yard, but that alley space shall not be included for loading and unloading berths.
(5) The maximum height requirement in Appendix (E) following this chapter may be increased if the buildings are set back from front and rear property lines one foot for each two feet of additional height above the maximum height requirements. (See also Appendix H).
(6) Chimneys, cooling towers, elevator bulkheads, fire towers, penthouses, tanks, water towers, transmission towers, or essential mechanical appurtenances may be erected to any height not prohibited by other laws or ordinances.
(Ord. 2281, passed 4-2-79) Penalty, see § 152.99