The I-1 Enclosed Industrial District is established to include most of the existing developments and provide for industrial expansion, and is one in which manufacturing, fabricating, processing, extraction, repairing, dismantling, storage or disposal of equipment, raw materials, manufactured products or wastes is conducted entirely within enclosed buildings of any size, provided that such use shall conform to the performance standards set forth herein. Business uses are not permitted in this district, and material storage (open) may be permitted as a special exception.
(A) Permitted uses.
(1) Agricultural uses;
(2) Single-family dwelling;
(3) Manufactured home;
(4) Enclosed industrial uses specifically stated or implied in the following categories:
(a) Enclosed industrial uses including processing, refining and repairing of goods, materials or products;
(b) Engineering or research laboratories, vocational or industrial training facilities, data processing or analysis;
(c) Mass transportation rights-of-way, including passenger stations, shelter stations and layover areas for transit vehicles and off-street parking facilities; provided, however, such uses, except rights-of-way, shall not exceed within 20 feet of a Residential District;
(d) Enclosed wholesaling, warehousing packaging, storage or distribution facilities (including commercial greenhouses);
(e) General offices associated with an industrial use, including service facilities for employees or guests; provided, however, any service facilities shall be entirely enclosed within a building;
(f) Printing, lithographing, publishing or photography establishments;
(g) Utility installations and facilities; and
(h) Public water wells, water stations, filtration plant, reservoirs and storage tanks.
(5) Wireless telecommunications service antenna, if visually integrated with or camouflaged on or within another structure (such as a chimney stack, church spire, light standards, monument, penthouse, power line support device or water tower), or if collocated on an existing or previously approved tower;
(6) Radio or television transmission antenna, if mounted on another structure tower;
(8) Contingent uses set forth in § 156.034 of this code;
(9) Accessory uses set forth in § 156.075 of this code; and
(10) Temporary uses set forth in § 156.076 of this code.
(B) Other requirements for the I-1 District.
(1) For enclosed industrial uses, each lot shall have at least 100 feet of frontage on a street or service road, provided that lots may be combined into a tract development with adequate access, in which case the frontage of the tract shall be at least 200 feet. See § 156.067 of this code for front yard or setback and additional yard requirements and planting screen requirements for interchange business uses.
(2) Height requirements are set forth in § 156.073 of this code.
(3) Off-street parking space requirements are set forth in § 156.078 of this code.
(4) The total floor area of the enclosed industrial building or buildings shall not exceed 60% of the lot area.
(C) Performance standards for enclosed industrial uses.
(1) Restrictions. No activity involving the storage, utilization or manufacture of materials or products which decompose by detonation shall be permitted, unless specifically approved by the Board of County Commissioners. Such activity shall be conducted in accordance with the rules promulgated by the State Fire Marshal. Such materials shall include, but are not limited to: All primary explosives such as lead azide, lead styphnate, fulminates and tetracene; all high explosives such as TNT, TDX, PETN and picric acid; propellants and components thereof, such as nitrocellulose, black powder, boron hydrides, hydrazine and its derivatives; pyrotechnics and fireworks such as magnesium powder, potassium chlorate and potassium nitrate; blast explosives such as dynamite and nitroglycerine; unstable organic compounds such as acetyrides, tetrazoles and ozonides; strong oxidizing agents such as liquid oxygen, perchloric acid, perchlorates, chlorates and hydrogen peroxide in concentrations greater than 35%; and nuclear fuels, fissionable materials and products; and reactor elements such as but not limited to Uranium 235 and Plutonium 239.
(2) Exceptions. The restrictions of this division (C) shall not apply to:
(a) The activities of site preparation or construction, maintenance, repair, alteration, modification or improvement of buildings, equipment or other improvements on or within the lot line;
(b) The operation of motor vehicles or other facilities for the transportation of personnel, materials or products;
(c) Conditions beyond the control of the user such as fire, explosion, accidents, failure or breakdown of equipment or facilities or emergencies; or
(d) Safety or emergency warning signals or alarms necessary for the protection of life, limb or property.
(3) Outdoor storage.
(a) Outdoor storage which is used as an accessory use to an enclosed industrial use in the I-1 District, may be permitted by the Board of Zoning Appeals; provided, that the said storage is located behind the building line and in such a manner that it cannot be seen from the frontal street or a side street.
(b) Screen planting or fence or wall, not to exceed eight feet in height, may be employed to screen storage areas from view.
(4) Smoke. The emission of more than 70 smoke units per hour per stack and emissions in excess of Ringelmann No. 2 are prohibited except for one hour during a 24-hour period in which this rate may be increased to 80 smoke units per hour per stack up to and including Ringelmann No. 3 for the purposes of process purging, soot blowing and fire cleaning.
(5) Particulate matter.
(a) The rate of particulate matter from an individual process within the boundaries of any lot shall not exceed a figure of six-hundredths of one pound effluent gas.
(b) Not more than 50% by weight of particles larger than 44 microns (325 mesh) shall be allowed.
(6) Odor. Any activity or operation which releases odors to the atmosphere shall be so controlled as to ensure that it will produce no public nuisance or hazard at or beyond the nearest residence or business district boundary line.
(7) Poisonous and injurious fumes and gases. The emission from any source shall not cause at or beyond any lot line, concentrations of toxic and/or injurious fumes or gases in excess of 10% of the threshold limit set for fume or gas in question in the Threshold Limit Values for Toxic Materials in Industry issued by the state’s Board of Health, from the American Conference of Governmental Hygienists, latest issue.
(8) Glare and heat. No operation, activity or structure shall cause heat or glare in such a manner as to be a public nuisance at or beyond any residence or business district boundary.
(9) Vibration. Any use creating intense earth-shaking vibrations such as are created by a heavy drop forge shall be set back from a residence district boundary at least 250 feet, or at least 150 feet from a business district boundary.
(10) Noise. At no point 125 feet from the boundary of an I-1, I-2 or B-3 District, which permits an enclosed industrial use, shall the sound pressure level of any operation or plant (other than background noises produced by sources not under the control of this chapter) exceed the decibel limits in the octave bands designated as follows:
Enclosed Industrial Use | ||
Octave Band Frequency (Cycles Per Second) | Maximum Permitted Sound Level (in Decibels) 125 Feet from District Adjoining Residence District Boundaries | Maximum Permitted Sound Level (in Decibels) 125 Feet from District Adjoining Business District Boundaries |
Enclosed Industrial Use | ||
Octave Band Frequency (Cycles Per Second) | Maximum Permitted Sound Level (in Decibels) 125 Feet from District Adjoining Residence District Boundaries | Maximum Permitted Sound Level (in Decibels) 125 Feet from District Adjoining Business District Boundaries |
0 to 75 | 75 | 80 |
75 to 150 | 70 | 75 |
150 to 300 | 65 | 70 |
300 to 600 | 59 | 64 |
600 to 1,200 | 53 | 58 |
1,200 to 2,400 | 48 | 53 |
2,400 to 4,800 | 48 | 49 |
Above 4,800 | 41 | 46 |
(11) Fire hazards. The storage, utilization or manufacture of solid materials products shall conform to the provisions of this chapter.
(Ord. 8-7-12-3, passed 10-10-1961; Ord. 2003-5, passed 11-3-2003; Ord. passed 1- -2004)