This chapter permits specific uses in specific
districts, and these performance standards are designed to limit,
restrict, and prohibit the effects of those uses outside their premises
or district. No structure, land, or water shall hereafter be used
except in compliance with the district regulations and with the following
performance standards.
The volume of sound inherently and recurrently
generated shall not exceed the following standards at any point along
the boundaries of the zone in which the use is located:
A.
Objectionable sounds of an intermittent nature shall
be controlled so as not to become a nuisance to adjacent uses.
B.
Maximum sound-pressure levels shall be measured with
a sound-level meter and associated octave band analyzer conforming
to standards prescribed by the American Standards Association and
shall not exceed the values for octave bands lying within the several
frequency limits given in the following table after the application
of appropriate corrections:
B-1 and B-2 Districts
| ||
---|---|---|
Frequency Ranges Containing Standard Octave
Bands in Cycles Per Second
|
Octave Band Sound-Pressure Level in Decibels
| |
0 to 74
|
72
| |
75 to 149
|
67
| |
150 to 299
|
59
| |
300 to 599
|
52
| |
600 to 1,199
|
46
| |
1,200 to 2,399
|
40
| |
2,400 to 4,800
|
34
| |
Above 4,800
|
32
|
Type of Operation or Noise
|
Correction in Decibels
| |
---|---|---|
Daytime operation only
|
+ 5
| |
Noise of impulsive character (e.g., hammering)
|
- 5
| |
Noise of periodic character (e.g., hum or screech)
|
- 5
|
I-1 District
| ||
---|---|---|
Frequency Ranges Containing Standard Octave
Bands in Cycles Per Second
|
Octave Band Sound-Pressure Level in Decibels
| |
0 to 74
|
79
| |
75 to 149
|
74
| |
150 to 299
|
66
| |
300 to 599
|
59
| |
600 to 1,199
|
53
| |
1,200 to 2,399
|
47
| |
2,400 to 4,800
|
41
| |
Above 4,800
|
39
|
Type of Operation or Noise
|
Correction in Decibels
| |
---|---|---|
Daytime operation only
|
+5
| |
Noise of impulsive character (e.g., hammering)
|
- 5
| |
Noise of periodic character (e.g., hum or screech)
|
- 5
|
No operation which creates vibrations which
are readily detectable without the use of instruments at any point
along lot lines shall be permitted.
No operation shall be permitted which causes radioactivity in violation of Title 10, Chapter 1, Part 20, Code of Federal Regulations, Standards for Protection Against Radiation, dated June 16, 1957, or any subsequent revisions or amendments.
No discharge beyond lot lines of any toxic or
noxious matter in such quantity as to be detrimental to or endanger
the public health, safety, comfort, or welfare, or cause injury or
damage to property or business, shall be permitted.
No direct or reflected glare from any I-1 District
shall be detectable from any residential boundary.
A.
Dust. No solid or liquid particles shall be emitted
in concentrations exceeding 0.3 grain per cubic foot of the conveying
gas or air.
B.
Fly ash.
(1)
No emission or fly ash in excess of the quantity specified
in the following table shall be permitted:
Heat in Fuel Burned
(British thermal units per hour)
|
Fly Ash: Rate of Emission
(pounds per hour)
| |
---|---|---|
1,000,000
|
1
| |
100,000,000
|
100
| |
400,000,000
|
330
| |
1,000,000,000
|
750
| |
2,000,000,000
|
1,365
| |
3,000,000,000
|
1,850
| |
4,000,000,000
|
2,260
| |
5,000,000,000
|
2,640
| |
6,000,000,000
|
2,950
| |
7,000,000,000
|
3,200
| |
8,000,000,000
|
3,410
| |
10,000,000,000
|
3,750
|
(2)
For heat content between any two consecutive heat
contents given in the table, the fly ash limitation shall be as determined
by interpolation.
C.
Smoke. No emission of smoke from any source, as measured
on the Ringelmann Chart published by the United States Bureau of Mines,
shall be permitted in excess of: