§ 151.072 INDUSTRIAL DISTRICTS.
   (A)   Smoke.
      (1)   No light industrial use may emit more than ten smoke units per hour, per stack or smoke, in excess of Ringelmann 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 time it may emit smoke up to and including Ringelmann No. 3.
      (2)   No heavy industrial use may emit more than 30 smoke units per hour, per stack or smoke, in excess of Ringelmann No. 2. However, once during any six-hour period, for soot blowing, process purging, and fire cleaning, each stack may be permitted an additional ten smoke units, and during that time it may emit smoke up to and including Ringelmann No. 3.
      (3)   In this section, the term RINGELMANN NUMBER means the number of the area on the Ringelmann Chart that most nearly matches the light-observing capacity of smoke. The Ringelmann Chart is described in the U.S. Bureau of Fines Information Circular 6888 or amendments, on which are illustrated graduated shades of gray for use in estimating smoke density. Smoke below the density of Ringelmann No. 0 and Ringelmann No. 1 shall be considered as no smoke.
      (4)   SMOKE UNIT means the number obtained when the smoke density in the Ringelmann Number is multiplied by the time of emission in minutes. For the purpose of the calculation, a Ringelmann density reading shall be made at least once a minute during which it is observed. The products so computed shall than be added to give the total number of smoke units observed during the entire observation period.
   (B)   Odor. No light or general industrial use may release an offensive odor that is detectable at the lot line.
   (C)   Toxic material. For a light or general industrial use, the emission of toxic or noxious materials may not produce a concentration at a residential or business district boundary line exceeding the percentage of the threshold limit values set forth by the Federal Emergency Management Agency.
   (D)   Glare and heat. No light or heavy industrial use may cause heat at the lot line so intense as to cause a public nuisance or hazard. No such use may cause illumination at or beyond any residential district boundary in excess of 0.1 foot candle. As used in this section, FOOT CANDLE means a unit of illumination at all points that are one foot from a uniform point source of one candle power.
   (E)   Vibration. No light or heavy industrial use may cause continuous earthborn vibration that does not meet the requirements set by IOSHA.
   (F)   Noise. No light or heavy industrial use may produce a sound pressure level that does not meet the guidelines of IOSHA.
   (G)   Fire Hazards.
      (1)   Solid substances ranging from dry active burning to intense burning may be stored, used, or manufactured only within completely enclosed walls and protected throughout by an automatic fire extinguishing system.
      (2)   The storage, utilization, or manufacture of flammable liquids or materials which produce flammable vapors or gases shall be permitted in accordance with the rules and regulations of the State Fire Marshal's Office, stating that the plans and specifications for light and heavy industrial use comply with the rules and regulations of the State Fire Marshal, and shall accompany the application for an improvement location permit.
      (3)   As used in this chapter, FREE BURNING shall mean a rate of combustion described by a substance that burns actively and easily supports combustion; INTENSE BURNING shall mean a rate of combustion described by a substance that burns with a high degree of activity and is consumed rapidly.
   (H)   Detonation Material.  
      (1)   No activity involving the storage, use, or manufacture of materials that decompose by detonation may be carried on, except in accordance with the rules and regulations issued by the State Fire Marshal and State Administrative Building Council. These materials include primary explosives such as lead azide, lead styphnate, fulminates, and tetracene; high explosives such as TNT, RDX, HMX, PETN and PICRIC ACID; propellants and their components, such as nitrocellulose, black powder, boron hydrides, hydrazine, and its derivatives; pyrotechnics and fireworks, such as magnesium powder, potassium chlorate, and potassium nitrate; blasting explosives such as dynamite and nitroglycerin; unstable organic compounds such as acetylides, tetrazoles, and ozonides; strong oxidizing agents such as liquid oxygen, perchlorates, chlorates and hydrogen peroxide in concentrations greater than 35% and nuclear fuels, fissionable material and products and reactor elements such as Uranium 235 and Plutonium 239.
      (2)   Restrictions that apply to industrial uses shall apply to general business uses when used for manufacturing.
   (I)   Storage Areas. All storage areas shall be enclosed with a six-foot fence surrounding the entire storage area.
(Ord. 5-2002, passed 3-4-02) Penalty, see § 151.999