(A) SMOKE - A light industrial use shall meet such requirements as are imposed by the Illinois Environmental Protection Agency or other applicable state or federal law.
(B) ODOR - No light industrial use may release an odor that is detectable at the lot line.
(C) TOXIC MATERIALS - For a light industrial use, the emission of toxic and noxious materials may not produce any concentration at a residence or business district boundary line exceeding 3% of the threshold limit values for toxic material in industry as set forth in “Threshold Limit Values” for the current year, as adopted at the annual meeting of the American Conference of Governmental Industrial Hygienists.
(D) GLARE AND HEAT - No light industrial use may cause heat at the lot line so intense as to be a public nuisance or hazard. No such use may cause illumination at or beyond any residence district boundary in excess of 0.1 foot candle (see footnote (2)).
(E) PARTICULATE MATTER (see footnote (3)) - A light industrial use shall meet such requirements as are imposed by the Illinois Environmental Protection Agency or other applicable state or federal law.
(1) Footnote (2) The term FOOT CANDLE means a unit of illumination equal to the illumination at all points that are 1 foot from a uniform point source of one candle power.
(2) Footnote (3) The term PARTICULATE MATTER means a divided liquid or solid material that is discharged and carried along in the air.
(F) VIBRATION - No light industrial use may cause, at the lot in continuous earthborne vibrations higher than the limits set forth in column I of the following table. Nor may it cause, at any residence district boundary, continuous earthborne vibrations higher than the limits set forth in column II.
I | II | ||
Frequency (cycles per second) | Displacement4 (inches) | Displacement4 (inches) | |
More than | But not more than | ||
I | II | ||
Frequency (cycles per second) | Displacement4 (inches) | Displacement4 (inches) | |
More than | But not more than | ||
0 | 10 | 0.0008 | 0.0004 |
10 | 20 | 0.0005 | 0.0002 |
20 | 30 | 0.0002 | 0.0001 |
30 | 40 | 0.0002 | 0.0001 |
40 | 50 | 0.0001 | 0.0001 |
50 | 0.0001 | 0.0001 | |
Discrete pulses that do not exceed 100 impulses per minute may not produce higher than twice the displacement specified in the table. | |||
Footnote (4) DISPLACEMENT means the maximum amount of motion in any direction as determined by any three component (simultaneous) measuring system approved by the Commission; and “three component measuring system” means instrumentation that can measure earthborne vibrations in a horizontal as well as a vertical plane. | |||
(G) Noise (see footnote (5) in the table below) - At no boundary of a residence or business district may the sound pressure level of any light industrial use (except for background noises produced by sources not under control of this ordinance, such as the operation of motor vehicles or other transportation facilities) exceed the following decibel limits:
I | II | ||
Octave Band Frequency (cycles per second) | Maximum Permitted Sound Level (decibels) Along Residence District Boundaries | Maximum Permitted Sound Level (decibels) Along Business District Boundaries | |
More Than | But Not More Than | ||
I | II | ||
Octave Band Frequency (cycles per second) | Maximum Permitted Sound Level (decibels) Along Residence District Boundaries | Maximum Permitted Sound Level (decibels) Along Business District Boundaries | |
More Than | But Not More Than | ||
20 | 75 | 72 | 79 |
75 | 150 | 67 | 74 |
150 | 300 | 59 | 66 |
300 | 600 | 52 | 59 |
600 | 1200 | 46 | 53 |
1200 | 2400 | 40 | 47 |
2400 | 4800 | 34 | 41 |
4800 | - | 32 | 39 |
The prescribed limits of column I apply between 8:00 a.m. and 6:00 p.m. At other times, the allowable levels in each octave band are each reduced by 6 decibels. | |||
Sound levels shall be measured with a sound level meter and associated octave band filter, manufactured and calibrated according to standards prescribed by the American Standards Association. Measurements shall be made using the Flat C network of the sound level meter and the fast meter movement of the octave band analyzer. Impulsive noises are subject to the performance standards prescribed by this section if they cause rapid fluctuations of the needle of the sound level meter with a variation of no more than plus or minus 2 decibels. Noises incapable of being so measured, such as irregular and intermittent noises, shall be controlled so as not to be a nuisance to adjacent uses. | |||
Footnote (5) OCTAVE BAND means all the frequencies from one frequency to a second. In sound octave bands, the second frequency is usually twice the first one; and “octave band filter” means an electrical device that separates the sounds in each octave band and presents them to the sound level meter. | |||
(H) Fire Hazards (see footnote (6).
(1) Solid substances ranging from free or active burning may be stored, used, or manufactured only within completely enclosed buildings having incombustible exterior 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. A certificate of compliance, issued by the State Fire Marshal’s Office, stating that the plan and specifications for a light or general industrial use comply with the Rules and Regulations of the State Fire Marshal shall accompany the application for a certificate of zoning compliance.
(2) Footnote (6) FREE BURNING means a rate of combustion described by a substance that burns actively and easily supports combustion; and “Intense burning” means a rate of combustion described by a substance that burns with a high degree of activity and is consumed rapidly.
(I) Detonation Materials -
(1) No activity involving the storage, use, or manufacturing of materials that decompose by detonation may be carried on except in accordance with the rules issued by the State Fire Marshal.
(2) 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 nitroglycerine; unstable organic compounds, such as acetylides, tetrazoles, and ozonides; strong oxidizing agents such as liquid oxygen, perchloric acid, perchlorates, chlorates, and hydrogen peroxide in concentrations greater than 35 percent; and nuclear fuels, fissionable materials and products, and reactor elements such as uranium 235 and plutonium 239.
(J) Exceptions -
(1) These performance standards do not apply to: Site preparation or construction, maintenance, repair, alteration or improvement of buildings, structures, equipment, or other improvements on or within the lot line;
(2) The operation of motor vehicles or other facilities for the transportation of personnel, materials, or products;
(3) Conditions beyond the control of the user such as fire, explosion, accident, failure, or breakdown;
(4) Safety or emergency warning signals or alarms necessary for the protection of life, limb, or property; or
(5) Processes for which there are no known means of control.
(6) Research shall be promptly conducted to discover methods of control leading to the installation of protective equipment.
(K) Open Storage - Open storage of materials shall be kept in a neat and orderly manner. Open storage shall be limited to no more than 50% of the open storage area, and shall not exceed 5’ 0” in height. All open areas shall be screened from public view by a fence of at least 6’ 0” in height. All open storage areas shall be paved with a dust free surface.
(Prior Code, Art. 21, § 21-204)