Performance Standards
Table No. 7 | ||||
|---|---|---|---|---|
Octave Band Frequency (Hz) | ||||
Greater Than | Less Than or Equal to | Residential District (decibels) | Nonresidential (decibels) | |
20 | 75 | 72 | 79 | |
75 | 150 | 67 | 74 | |
150 | 300 | 59 | 66 | |
300 | 800 | 52 | 59 | |
800 | 1,200 | 46 | 53 | |
1,200 | 2,400 | 40 | 47 | |
2,400 | 4,800 | 34 | 41 | |
4,800 | — | 32 | 39 | |
Table No. 8 | |||
|---|---|---|---|
Type or Location of Operations or Character of Noise | Correction in Decibels | ||
Daytime operation only | 5 | ||
Noise source operates less than:1 | |||
20% of any one-hour period | 5 | ||
5% of any one-hour period | 10 | ||
Noise of impulsive character, hammering, etc. | -5 | ||
Noise of periodic character, hum, screech, etc. | -5 | ||
Property is located in an M District and is not within 500 feet measured horizontally or vertically of any R District | 10 | ||
NOTES: | |
1Apply one of these corrections only. |
Table No. 9 | ||||
|---|---|---|---|---|
Frequency (Hz) | ||||
Greater Than | Less Than or Equal to | Residential District Displacement (inches) | Nonresidential District Displacement (inches) | |
0 | 10 | 0.0004 | 0.0020 | |
10 | 20 | 0.0002 | 0.0010 | |
20 | 30 | 0.0001 | 0.0006 | |
30 | 40 | 0.0001 | 0.0004 | |
40 | 50 | 0.0001 | 0.0003 | |
50 | — | 0.0001 | 0.0002 | |
Performance Standards
Table No. 7 | ||||
|---|---|---|---|---|
Octave Band Frequency (Hz) | ||||
Greater Than | Less Than or Equal to | Residential District (decibels) | Nonresidential (decibels) | |
20 | 75 | 72 | 79 | |
75 | 150 | 67 | 74 | |
150 | 300 | 59 | 66 | |
300 | 800 | 52 | 59 | |
800 | 1,200 | 46 | 53 | |
1,200 | 2,400 | 40 | 47 | |
2,400 | 4,800 | 34 | 41 | |
4,800 | — | 32 | 39 | |
Table No. 8 | |||
|---|---|---|---|
Type or Location of Operations or Character of Noise | Correction in Decibels | ||
Daytime operation only | 5 | ||
Noise source operates less than:1 | |||
20% of any one-hour period | 5 | ||
5% of any one-hour period | 10 | ||
Noise of impulsive character, hammering, etc. | -5 | ||
Noise of periodic character, hum, screech, etc. | -5 | ||
Property is located in an M District and is not within 500 feet measured horizontally or vertically of any R District | 10 | ||
NOTES: | |
1Apply one of these corrections only. |
Table No. 9 | ||||
|---|---|---|---|---|
Frequency (Hz) | ||||
Greater Than | Less Than or Equal to | Residential District Displacement (inches) | Nonresidential District Displacement (inches) | |
0 | 10 | 0.0004 | 0.0020 | |
10 | 20 | 0.0002 | 0.0010 | |
20 | 30 | 0.0001 | 0.0006 | |
30 | 40 | 0.0001 | 0.0004 | |
40 | 50 | 0.0001 | 0.0003 | |
50 | — | 0.0001 | 0.0002 | |