Any use established in the O/R, Planned Office/Research district, shall be operated so as to comply with the performance standard regulations prescribed in this Section, and no use lawfully established after the effective date of the regulation of the performance standards for the O/R, Planned Office Research district, shall be hereafter altered or modified so as to conflict with or further conflict with such performance standards.
(Ord. 432, passed 8-15-2000)
A. Noise.
1. At no point one hundred twenty-five feet (125') from the nearest property line of a plant or operation, shall the sound pressure level of an individual operation or plant (other than the operation of motor vehicles) exceed the decibel levels at the designated octave bands shown hereafter.
Octave Band Frequency Cycles Per Second | Decibels |
Octave Band Frequency Cycles Per Second | Decibels |
0 to 74 | 67 |
75 to 149 | 59 |
150 to 299 | 52 |
300 to 599 | 46 |
600 to 1,199 | 40 |
1,200 to 2,399 | 34 |
Over 2,399 | 32 |
2. Method of Measurement. Sound levels shall be measured with a sound level meter and associated octave band filter manufactured according to standards prescribed by the American Standards Association.
a. Noises capable of being so measured, for the purpose of this Chapter, shall be those noises which cause rapid fluctuations of the needle of the sound level meter with a variation of no more than plus or minus two (2) decibels.
b. Measurements shall be made using the flat network of the sound level meter.
c. Impulsive type noises shall be subject to the performance standards hereinafter prescribed; provided, that such noises shall be capable of being accurately measured with such equipment.
d. Noises, incapable of being so measured, such as those of an irregular and intermittent nature, shall be controlled so as not to become a nuisance to adjacent uses.
B. Smoke and Particulate Matter. The emission from all sources within any lot of particular matter containing more than five percent (5%) by weight or particles having a particle diameter larger than forty four (44) microns is prohibited. Dust and other types of air pollution borne by the wind from such sources as storage areas, yards and streets within the boundaries of any lot shall be kept to a minimum by appropriate landscaping, paving, oiling or other acceptable means. Emission of particulate matter from such sources in excess of weight limitations specified herein is prohibited. The emission of smoke or particulate matter of a density equal to, or greater than, No. 2 of the Ringelmann Chart is prohibited at all times, except as otherwise provided herein.
1. Smoke Emission. In the business park district, the emission of more than twelve (12) smoke units per stack in any one hour period is prohibited. However, once during any six (6) hour period each stack shall be permitted up to twelve (12) additional units in a fifteen (15) minute period. Only during such fifteen (15) minute periods shall smoke of a density equal to, but not exceeding, Ringelmann No. 3 be permitted, and then only for fire cleaning and for not more than four (4) minutes per period.
2. Particulate Matter Emission. The rate of emission of particulate matter from all sources within the boundaries of any lot shall not exceed the rate established in the table below:
PERMITTED RATE OF PARTICULATE MATTER
EMISSION IN POUNDS PER HOUR, PER ACRE
| |
Height of Emission | |
Feet | Pounds |
PERMITTED RATE OF PARTICULATE MATTER
EMISSION IN POUNDS PER HOUR, PER ACRE
| |
Height of Emission | |
Feet | Pounds |
0 to 49 | 1.00 |
50 to 99 | 1.01 |
100 to 149 | 1.06 |
150 to 199 | 1.10 |
200 to 299 | 1.16 |
300 to 399 | 1.30 |
400 and over | 1.50 |
3. Methods of Measurement.
a. Smoke. For the purpose of grading the density of emission of smoke, the Ringelmann Chart, published and used by the United States Bureau of Mines, shall be employed. For the purpose of determining smoke units, the Ringelmann density reading shall be made at least every minute during the period of observation. Each reading (Ringelmann number) shall be multiplied by the time in minutes for which it is observed, and the products added together to determine the total number of smoke units observed during the total period of observation.
b. Particulate Matter. The total net rate of emission of particulate matter within the boundaries of any lot shall be determined as follows.
C. Odorous Matter. No continuous, frequent or repetitive emission of odors or odor-causing substances which would be offensive beyond any property line of any use will be permitted. An odor emitted no more than fifteen (15) minutes in any one day shall not be deemed as continuous, frequent or repetitive within the meaning of these regulations. The existence of an odor shall be presumed when analysis by a competent technician demonstrates that a discernible odor is being emitted. Any process which may involve the creation or emission of any odors shall be provided with a primary and secondary safeguard system so that control will be maintained if the primary safeguard system fails. The rules and regulations of the Illinois Pollution Control Board shall be complied with.
D. Vibration. Any process or equipment which produces intense earth-shaking vibration, such as are created by heavy drop forges or heavy hydraulic surges shall not be permitted.
E. Radiation Hazards. The handling of radioactive materials, the discharge of such materials into air and water, and the disposal of radioactive wastes shall be in conformance with:
1. The applicable regulations of the Nuclear Regulatory Commission; and
2. The applicable regulations of any instrumentality of the State of Illinois.
F. Glare or Heat. Any operation producing intense glare or heat shall be performed within a completely enclosed building and effectively screened in such a manner as not to create a public nuisance or hazard along property boundaries.
G. Fire and Explosive Hazards. Fire and explosive hazards shall be controlled as follows:
1. Activities involving the storage or manufacture of materials or products which decompose by detonation are not permitted.
2. The storage, utilization or manufacture of materials ranging from incombustible to moderate burning as determined by the Zoning Administrator is permitted (as defined by the National Fire Protection Association).
3. The storage, utilization or manufacture of materials or products ranging from free or active burning to intense burning, as determined by the Zoning Administrator, is permitted (as defined by the National Fire Protection Association) under the following conditions:
a. All storage, utilization or manufacture of such materials or products shall be within completely enclosed buildings or structures having incombustible exterior walls; and
b. All such buildings or structures shall be set back at least forty feet (40') from property boundaries and shall be protected throughout by an automatic sprinkler system complying with standards for installation prescribed by the National Fire Protection Association.
4. Materials or products which produce flammable or explosive vapors or gases under ordinary weather temperatures shall not be permitted in this District, with the exception of the following which shall be permitted:
a. Materials required for emergency or standby equipment;
b. Materials used in secondary processes which are auxiliary to a principal operation, such as paint spraying of finished products; and
c. Flammable liquids and oils stored, sold and used in conjunction with the operation of an automobile service station and customarily required or used in such operation.
(Ord. 397, passed 5-12-99)