All uses in IP zones shall meet the following performance standards.
(A) Noise. The maximum sound pressure level of activities other than street or highway transportation, temporary construction work, or temporary oil or gas drilling or exploration operations, as determined by the City Engineer, shall not exceed the standards for octave bands within the frequency limits given below after applying the correction factors:
(1) Noise at zone boundaries. At no point on the boundary of an IP zone shall the sound pressure level of any individual operation, use, or plant exceed the decibel levels in the designated octave bands set forth below:
Octave Band Cycles Per Second |
Maximum Permitted Sound Level in Decibels (.0002 Dynes/cm2 ) |
Octave Band Cycles Per Second |
Maximum Permitted Sound Level in Decibels (.0002 Dynes/cm2 ) |
0 - 75 | 72 |
75 - 150 | 67 |
150 - 300 | 59 |
300 - 600 | 52 |
600 - 1,200 | 46 |
1,200 - 2,400 | 40 |
2,400 - 4,800 | 34 |
Above 4,800 | 32 |
(2) Noise at property lines. At no point on the lot lines of any property shall the sound pressure level of any individual operation, use or plant exceed the decibel levels in the designated octave bands shown below:
Octave Band Cycles Per Second |
Maximum Permitted Sound Level in Decibels (.0002 Dynes/cm2 ) |
Octave Band Cycles Per Second |
Maximum Permitted Sound Level in Decibels (.0002 Dynes/cm2 ) |
0 - 75 | 80 |
75 - 150 | 75 |
150 - 300 | 70 |
300 - 600 | 64 |
600 - 1,200 | 58 |
1,200 - 2,400 | 53 |
2,400 - 4,800 | 49 |
Above 4,800 | 46 |
(3) Corrective factors in noise measurement. To any irregular or impulsive noise, one or more of the following corrective factors shall be added to the values permitted sound level:
Character of Noise
|
Correction in Decibels
|
Occurs between 10:00 p.m. and 7:00 a.m. | Minus 10 |
Noise source operates less than a total of 30 minutes in any day | Plus 10 |
Noise of impulsive character, such as hammering | Minus 5 |
(B) Air pollution. There shall be no discharge into the atmosphere, from any source, of particulate matter in excess of 0.3 grams per cubic foot of gas at standard conditions. There shall be no emission of gas, smoke, particulate material, dust, or other air contaminants for a period or periods aggregating more than three minutes in any one hour which contaminants are:
(1) As dark or darker in shade as that designated as No. 2 on the Ringelmann Chart as published by the US Bureau of Mines; or
(2) Of such opacity as to obscure an observer's view to a degree equal to or greater than does smoke described in subsection § 10-3.11.506(B)(1) of this subsection.
(C) Odor. Odors from gases shall not be in such quantity as to be offensive beyond the lot lines of the use.
(D) Vibration. Vibration from any machine, operation, or process shall not cause a perceptible motion at the lot lines.
(E) Glare and heat. Glare and heat from any source shall not be produced beyond the lot lines.
(F) Radioactivity and electrical disturbances. The use of radioactive materials within IP zones shall be limited to measuring, gauging, and calibration devices, such as tracer elements in X-ray and like apparatus, and in connection with the processing and preservation of foods. All electrical and electronic devices and equipment shall be suitably wired, shielded, and controlled so that in operation they shall not, beyond the lot lines, emit any electrical impulses or waves which will adversely affect the operation and control of any other electrical or electronic devices and equipment.
('61 Code, § 10-3.11.506) (Ord. 183 C.S., passed 5-31-72)