PI Planned Industrial District
Octave Band Frequency (cycles per second) | Residential District (decibels) | Nonresidential (decibels) | ||
|---|---|---|---|---|
Greater Than | Less Than or Equal to | |||
20 | 75 | 72 | 79 | |
75 | 150 | 67 | 74 | |
150 | 300 | 59 | 66 | |
300 | 600 | 52 | 59 | |
600 | 1,200 | 46 | 53 | |
1,200 | 2,400 | 40 | 47 | |
2,400 | 4,800 | 34 | 41 | |
4,800 | — | 32 | 39 | |
The maximum permitted sound levels for residential districts shall apply between the hours of 7:00 a.m. and 6:00 p.m. and shall be reduced by six decibels in each octave band for any other time of day. For the purposes of the section, "decibels" shall mean "A" weighted decibels. | ||||
Frequency (cycles per second) | Residential District Displacement (in inches) | Nonresidential District Displacement (in inches) | ||
|---|---|---|---|---|
Greater Than | Less Than or Equal to | |||
0 | 10 | .0004 | .0020 | |
10 | 20 | .0002 | .0010 | |
20 | 30 | .0001 | .0006 | |
30 | 40 | .0001 | .0004 | |
40 | 50 | .0001 | .0003 | |
50 | — | .0001 | .0002 | |
Discrete pulses that do not exceed 100 impulses per minute may not produce more than twice the displacement specified in the table. | ||||
PI Planned Industrial District
Octave Band Frequency (cycles per second) | Residential District (decibels) | Nonresidential (decibels) | ||
|---|---|---|---|---|
Greater Than | Less Than or Equal to | |||
20 | 75 | 72 | 79 | |
75 | 150 | 67 | 74 | |
150 | 300 | 59 | 66 | |
300 | 600 | 52 | 59 | |
600 | 1,200 | 46 | 53 | |
1,200 | 2,400 | 40 | 47 | |
2,400 | 4,800 | 34 | 41 | |
4,800 | — | 32 | 39 | |
The maximum permitted sound levels for residential districts shall apply between the hours of 7:00 a.m. and 6:00 p.m. and shall be reduced by six decibels in each octave band for any other time of day. For the purposes of the section, "decibels" shall mean "A" weighted decibels. | ||||
Frequency (cycles per second) | Residential District Displacement (in inches) | Nonresidential District Displacement (in inches) | ||
|---|---|---|---|---|
Greater Than | Less Than or Equal to | |||
0 | 10 | .0004 | .0020 | |
10 | 20 | .0002 | .0010 | |
20 | 30 | .0001 | .0006 | |
30 | 40 | .0001 | .0004 | |
40 | 50 | .0001 | .0003 | |
50 | — | .0001 | .0002 | |
Discrete pulses that do not exceed 100 impulses per minute may not produce more than twice the displacement specified in the table. | ||||