I Industrial District
Gross Floor Area (square feet) | Required Number of Loading Spaces |
|---|---|
3,000 — 25,000 | 1 |
25,000 — 40,000 | 2 |
40,000 — 60,000 | 3 |
60,000 — 100,000 | 4 |
Each additional 50,000 | 1 additional |
Heat in Fuel Burned (British thermal units per hour) | Fly Ash Rates of Emission (1 pound per hour) |
|---|---|
1,000,000 | 1 |
100,000,000 | 100 |
400,000,000 | 330 |
1,000,000,000 | 750 |
2,000,000,000 | 1,365 |
3,000,000,000 | 1,850 |
4,000,000,000 | 2,260 |
5,000,000,000 | 2,640 |
6,000,000,000 | 2,950 |
7,000,000,000 | 3,200 |
8,000,000,000 | 3,410 |
10,000,000,000 | 3,750 |
Frequency Band (cycles per second) | Sound Pressure Level in Decibels* |
|---|---|
20 — 75 | 69 |
75 — 150 | 54 |
150 — 300 | 47 |
300 — 600 | 41 |
600 — 1,200 | 37 |
1,200 — 2,400 | 34 |
2,400 — 9,600 | 28 |
*According to the following formula, sound pressure level in decibels equals 25 log P/P2, where P2 equals 002 dynes/square centimeter. | |
Corrections in Decibels | Type of Operation or Character of Noise |
|---|---|
Daytime operation only | + 5 |
Noise source operates less than 20% of the time | + 5* |
Noise source operates less than 5% of the time | + 10* |
Noise source operates less than 1% of the time | + 15* |
Noise of impulsive character (hammering, etc.) | - 5 |
Noise of periodic character (hum, screech, etc.) | - 5 |
*Apply one of these corrections only. | |
I Industrial District
Gross Floor Area (square feet) | Required Number of Loading Spaces |
|---|---|
3,000 — 25,000 | 1 |
25,000 — 40,000 | 2 |
40,000 — 60,000 | 3 |
60,000 — 100,000 | 4 |
Each additional 50,000 | 1 additional |
Heat in Fuel Burned (British thermal units per hour) | Fly Ash Rates of Emission (1 pound per hour) |
|---|---|
1,000,000 | 1 |
100,000,000 | 100 |
400,000,000 | 330 |
1,000,000,000 | 750 |
2,000,000,000 | 1,365 |
3,000,000,000 | 1,850 |
4,000,000,000 | 2,260 |
5,000,000,000 | 2,640 |
6,000,000,000 | 2,950 |
7,000,000,000 | 3,200 |
8,000,000,000 | 3,410 |
10,000,000,000 | 3,750 |
Frequency Band (cycles per second) | Sound Pressure Level in Decibels* |
|---|---|
20 — 75 | 69 |
75 — 150 | 54 |
150 — 300 | 47 |
300 — 600 | 41 |
600 — 1,200 | 37 |
1,200 — 2,400 | 34 |
2,400 — 9,600 | 28 |
*According to the following formula, sound pressure level in decibels equals 25 log P/P2, where P2 equals 002 dynes/square centimeter. | |
Corrections in Decibels | Type of Operation or Character of Noise |
|---|---|
Daytime operation only | + 5 |
Noise source operates less than 20% of the time | + 5* |
Noise source operates less than 5% of the time | + 10* |
Noise source operates less than 1% of the time | + 15* |
Noise of impulsive character (hammering, etc.) | - 5 |
Noise of periodic character (hum, screech, etc.) | - 5 |
*Apply one of these corrections only. | |