17.36 INDUSTRIAL AND COMMERCIAL USES
Table 1 | |
|---|---|
Frequency Band (Cycles per second) | Sound Pressure Level Decibels* |
20—75 | 75 |
75—150 | 70 |
150—300 | 62 |
300—600 | 55 |
600—1200 | 49 |
1200—2400 | 43 |
2400—4800 | 37 |
4800—10000 | 35 |
Notes: |
*According to the following formula: Sound pressure level in
decibels equals 10 log P/0.0002 dynes/sq. cm. |
Table 2 | |
|---|---|
Type of Operation or Character of Noise | Correction in Decibels |
Daytime operation 7:00 a.m. to 11:00 p.m. | plus 5 |
Noise source operated less than 20% of any one-hour period | plus 5* |
Noise source operated less than 5% of any one-hour period | plus 10* |
Noise source operated less than 1% of any one-hour period | plus 15* |
Noise of impulsive character (hammering and so forth) | minus 5 |
Noise of periodic character (hum, screech and so forth) | minus 5 |
Notes: |
Apply one of these corrections only. |
Maximum 5-day biochemical oxygen demand | 20 ppm |
Maximum total solids | 5,000 ppm |
Maximum phenol | 0.1 ppm |
Minimum Lot Area | 200,000 sq. ft. |
Minimum Lot Width and Frontage | 300 ft. |
Minimum Front Yard | 50 ft. |
Minimum Rear Yard | 50 ft. |
Minimum Side Yard | 50 ft. |
Maximum Lot Coverage (%) | 40% |
17.36 INDUSTRIAL AND COMMERCIAL USES
Table 1 | |
|---|---|
Frequency Band (Cycles per second) | Sound Pressure Level Decibels* |
20—75 | 75 |
75—150 | 70 |
150—300 | 62 |
300—600 | 55 |
600—1200 | 49 |
1200—2400 | 43 |
2400—4800 | 37 |
4800—10000 | 35 |
Notes: |
*According to the following formula: Sound pressure level in
decibels equals 10 log P/0.0002 dynes/sq. cm. |
Table 2 | |
|---|---|
Type of Operation or Character of Noise | Correction in Decibels |
Daytime operation 7:00 a.m. to 11:00 p.m. | plus 5 |
Noise source operated less than 20% of any one-hour period | plus 5* |
Noise source operated less than 5% of any one-hour period | plus 10* |
Noise source operated less than 1% of any one-hour period | plus 15* |
Noise of impulsive character (hammering and so forth) | minus 5 |
Noise of periodic character (hum, screech and so forth) | minus 5 |
Notes: |
Apply one of these corrections only. |
Maximum 5-day biochemical oxygen demand | 20 ppm |
Maximum total solids | 5,000 ppm |
Maximum phenol | 0.1 ppm |
Minimum Lot Area | 200,000 sq. ft. |
Minimum Lot Width and Frontage | 300 ft. |
Minimum Front Yard | 50 ft. |
Minimum Rear Yard | 50 ft. |
Minimum Side Yard | 50 ft. |
Maximum Lot Coverage (%) | 40% |