The I-1 Enclosed Industrial District is established to 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. Screening of storage, parking, and loading areas is essential in this District as it may often be located adjacent to residential areas and may serve as a buffer between the I-2 Industrial Districts and business or residential districts. Business uses are not permitted in this District, and provided further that material storage (open) may be permitted as an exception.
(A) Permitted uses.
(1) Agricultural uses;
(2) Single-family dwelling;
(3) Manufactured home;
(4) Enclosed industrial uses specially stated or implied in the following categories:
(a) Enclosed industrial uses including processing, refining, repairing of goods, materials, or products;
(b) Engineering or research laboratories, vocational, or industrial training facilities, data processing, or analysis;
(c) Enclosed wholesaling, warehousing packaging, storage, or distribution facilities (including commercial greenhouses);
(d) 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;
(e) Printing, lithographing, publishing, or photography establishments; and
(f) Utility installations and facilities.
(5) Applicable special exceptions set forth in § 153.014;
(6) Applicable contingent uses set forth in § 153.065;
(7) Accessory uses set forth in § 153.066; and
(8) Temporary uses set forth in § 153.067.
(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 § 153.015 for front yard or setback and additional yard requirements and planting screen requirements for interchange business uses.
(2) Height requirements are set forth in § 153.021.
(3) Off-street parking space requirements are set forth in § 153.024.
(4) The total floor area of the enclosed industrial building or buildings shall not exceed 60% of the lot area.
(6) See Figure 1 for additional industrial use requirements.
(C) Performance standards for enclosed industrial uses.
(1) Prohibitions.
(a) No activity involving the storage, utilization, or manufacture of materials or products which decompose by detonation shall be permitted, unless specifically approved by the County Board of Commissioners if the activity is proposed to be located in the unincorporated territory and by the applicable Town Council if the activity is proposed to be located in a town.
(b) 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 aside, lead styphnate, fulminates, and tetracene; all high explosives such as TNT, TDX, HMX, 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, terazoles, and oxonides; strong oxidizing agents such as liquid oxygen, perchloric acid, perchlorate, chlorates, and hydrogen peroxide in concentrations greater than 35%; and nuclear fuels, fissionable materials, and products; and reactor elements such as Uranium 235 and Plutonium 239.
(2) Exceptions. The restrictions of this division (C)(2) 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; and
(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 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 plantings or fences or walls 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 that for one-hour period during any 24-hour period, 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 0.06 pounds of 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 district boundary line.
(7) Poisonous and injurious fumes and gases. The emission of toxic or injurious fumes and gases shall be controlled so as to comply with the following: the emission from any source shall not cause at or beyond any lot line, concentrations of toxic and/or injurious fumes, and gases in excess of 10% of the threshold limit set for the fume or gas in question in the “Threshold Limit Values for Toxic Materials in Industry”, issued by the State 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 GB 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 4,9000 | 41 | 46 |
(11) Fire hazards. The storage, utilization, or manufacture of solid materials or products shall conform to the provisions of this chapter.
(Ord. passed - -1996)