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The following performance standards shall apply to all industrial uses, in addition to the previous requirements.
(1) No industry in the I-1 District may emit more than ten smoke units per hour per stack or smoke in excess of Ringelman No. 2. However, once during any 24-hour period, for soot blowing, process purging and fire cleaning, each stack may emit an additional ten smoke units, and during that period it may emit smoke up to and including Ringelman No. 3.
(2) No industry in the I-2 District may emit more than 30 smoke units per hour per stack or smoke in excess of Ringelman No. 2. However, once during any 24-hour period, for soot blowing, process purging and fire cleaning, each stack may emit an additional ten smoke units and, during that period, it may emit smoke up to and Including Ringelman No. 3.
(B) Odor. No industrial use in any district may release an odor that is detectable at the lot line.
(C) Toxic materials. No gases or fumes toxic to persons or injurious to property shall be permitted to escape beyond the building in which it occurs.
(D) Glare and heat. No industrial use may cause heat at the property line so intense as to be a public nuisance or hazard. No glare shall be seen from any street or residential area.
(E) Vibration. No intense vibration shall be created or maintained by any industrial use so as to be noticeable beyond the boundary lines of the tract on which it is located.
(F) Noise and sound. At no boundary line of any residential or business district may the sound level of any industrial use (excluding background noises produced by sources not under the control of this chapter such as the operation of motor vehicles) exceed 70 decibels. Noise is to be muffled so as not to be objectionable due to intermittence, frequency or shrillness.
(G) Exceptions. Divisions (A) through (F) above, inclusive, do not apply to:
(1) Site preparation or construction, maintenance, repair, alterations or improvements of buildings, structures, equipment or other improvements on or within the lot lines;
(2) The operation of motor vehicles or other facilities for the transportation of personnel, materials or products; and
(3) Safety or emergency warning signals or alarms necessary for the protection of life, limb or property.
(H) Special restrictions. Any industrial operation or activity must, in addition to the above, conform with any applicable acts of the state and federal government. Where the requirements of this chapter are more restrictive, they shall take precedence. All relevant federal and state permits or approvals are required prior to issuance of an improvement location permit.
(Ord. 2000-16, passed 8-28-2000, § 2.33)