Zone
|
Buffer Width
| |
---|---|---|
Business A, B, C and NB
|
20 feet
| |
Industrial A and B, Business Overlay BA 1
|
20 feet
|
Octave-Band Center Frequency
(H3)
|
Column 1 Octave-Band Sound Pressure Level
(dB) From 7:00 a.m. to 7:00 p.m.
|
Column 2 Octave-Band Sound Pressure Level
(dB) From 7:00 p.m. to 7:00 a.m.
| |
---|---|---|---|
20 to 75
|
75
|
65
| |
75 to 150
|
60
|
50
| |
150 to 300
|
54
|
44
| |
300 to 600
|
48
|
38
| |
600 to 1,200
|
45
|
35
| |
1,200 to 2,400
|
42
|
32
| |
2,400 to 4,800
|
39
|
29
| |
Above 4,800
|
36
|
26
|