Planned Industrial Park District
TABLE I | ||
|---|---|---|
Maximum Permissible Sound-Pressure Levels at the Lot Line for Noise Radiated Continuously From a Facility Between the Hours of 9:00 p.m. and 7:00 a.m. | ||
Frequency Band (cycles per second) | Sound Pressure Level (decibels re 0.0002 dyne/cm2) | |
20-75 | 69 | |
75-150 | 60 | |
150-300 | 56 | |
300-600 | 51 | |
600-1,200 | 42 | |
1,200-2,400 | 40 | |
2,400-4,800 | 38 | |
4,800-10,000 | 35 | |
If the noise is not smooth and continuous and is not radiated between the hours of 9:00 p.m. and 7:00 a.m., one or more of the corrections in Table III shall be added to or subtracted from each of the decibel levels given in Table I. |
TABLE II | ||
|---|---|---|
Maximum Permissible Sound-Pressure Levels at a Lot Line for Noise Radiated Continuously From a Facility Between the Hours of 9:00 p.m. and 7:00 a.m., Where the Lot Line Adjoins or Lies Within Twenty-five Feet of the Boundary of a Residence District. | ||
Frequency Band (cycles per second) | Sound Pressure Level (decibels re 0.0002 dyne/cm2) | |
20-75 | 65 | |
75-150 | 50 | |
150-300 | 43 | |
300-600 | 38 | |
600-1,200 | 33 | |
1,200-2,400 | 30 | |
2,400-4,800 | 28 | |
4,800-10,000 | 26 | |
If the noise is not smooth and continuous and is not radiated between the hours of 9:00 p.m. and 7:00 a.m., one or more of the corrections in Table III which follows shall be added to or subtracted from each of the decibel levels given in Table II. |
TABLE III | ||
|---|---|---|
Type of Operation in Character of Noise | Correction in Decibels | |
Daytime operation only | plus 5 | |
Noise source operates less than 20% of any one-hour period | plus 5* | |
Noise source operates less than 5% of any one-hour period | plus 10* | |
Noise source operates less than 1% of any one-hour period | plus 15* | |
Noise of impulsive character (hammering, etc.) | minus 5 | |
Noise of periodic character (hum, screech, etc.) | minus 5 | |
*NOTE: Apply one of these corrections only. |
Planned Industrial Park District
TABLE I | ||
|---|---|---|
Maximum Permissible Sound-Pressure Levels at the Lot Line for Noise Radiated Continuously From a Facility Between the Hours of 9:00 p.m. and 7:00 a.m. | ||
Frequency Band (cycles per second) | Sound Pressure Level (decibels re 0.0002 dyne/cm2) | |
20-75 | 69 | |
75-150 | 60 | |
150-300 | 56 | |
300-600 | 51 | |
600-1,200 | 42 | |
1,200-2,400 | 40 | |
2,400-4,800 | 38 | |
4,800-10,000 | 35 | |
If the noise is not smooth and continuous and is not radiated between the hours of 9:00 p.m. and 7:00 a.m., one or more of the corrections in Table III shall be added to or subtracted from each of the decibel levels given in Table I. |
TABLE II | ||
|---|---|---|
Maximum Permissible Sound-Pressure Levels at a Lot Line for Noise Radiated Continuously From a Facility Between the Hours of 9:00 p.m. and 7:00 a.m., Where the Lot Line Adjoins or Lies Within Twenty-five Feet of the Boundary of a Residence District. | ||
Frequency Band (cycles per second) | Sound Pressure Level (decibels re 0.0002 dyne/cm2) | |
20-75 | 65 | |
75-150 | 50 | |
150-300 | 43 | |
300-600 | 38 | |
600-1,200 | 33 | |
1,200-2,400 | 30 | |
2,400-4,800 | 28 | |
4,800-10,000 | 26 | |
If the noise is not smooth and continuous and is not radiated between the hours of 9:00 p.m. and 7:00 a.m., one or more of the corrections in Table III which follows shall be added to or subtracted from each of the decibel levels given in Table II. |
TABLE III | ||
|---|---|---|
Type of Operation in Character of Noise | Correction in Decibels | |
Daytime operation only | plus 5 | |
Noise source operates less than 20% of any one-hour period | plus 5* | |
Noise source operates less than 5% of any one-hour period | plus 10* | |
Noise source operates less than 1% of any one-hour period | plus 15* | |
Noise of impulsive character (hammering, etc.) | minus 5 | |
Noise of periodic character (hum, screech, etc.) | minus 5 | |
*NOTE: Apply one of these corrections only. |