Performance Standard For
|
Applies To
|
Heavy industrial uses | Conditional uses in I-1 |
Other uses | Conditional uses in all districts except I-1 |
Permitted uses in all districts | |
Unspecified | Permitted uses in all districts |
Conditional uses in all districts |
Preferred Center Frequency in Hertz | Maximum Permitted Sound Pressure Level in Decibels at Boundaries of Nearest Residentially Zoned Lot |
Preferred Center Frequency in Hertz | Maximum Permitted Sound Pressure Level in Decibels at Boundaries of Nearest Residentially Zoned Lot |
31.5 | 75 |
63 | 74 |
125 | 69 |
250 | 64 |
500 | 58 |
1,000 | 52 |
2,000 | 47 |
4,000 | 43 |
8,000 | 40 |
Above figures for octave band analyzers calibrated with preferred frequencies (American Standards Association S1.6-1960, preferred frequencies for acoustical measurement) Sound levels above shall be modified where applicable by the adjustments in Table 23 | |
Adjustment in Decibels | |
Duration of noise in any one-hour period (use one adjustment only): | |
Under 12 minutes | Add 5 dB |
Under 3 minutes | Add 10dB |
Under ½ minute | Add 15dB |
At boundaries of nearest office or commercial zoned lot | Add 5dB |
Noise is impulsive in character (such as, hammering) | Subtract 5dB |
Noise is periodic in character (such as, hum, screech) | Subtract 5dB |
Noise may be heard between hours of 7:00 p.m. and 7:00 a.m. | Subtract 5dB |
Maximum Permitted Particle Velocity* | ||
Use | At Adjacent Lot Line | At Nearest Residentially Zoned Lot Boundary ** |
Heavy Industrial | 0.2 | 0.02 |
Other | 0.1 | 0.02 |
* Where vibration is produced as discrete impulses (impact vibrations) not exceeding 100 per minute, maximum permitted velocities may be doubled ** Between 7:00 a.m. and 7:00 p.m., maximum permitted velocity at residentially zoned lot boundaries shall be reduced 50% | ||
During One-Hour Per 24-Hour Day* | All Other Times | |||
Heavy Industrial | Other | Heavy Industrial | Other | |
Maximum permitted smoke units *** per hour per stack | 32 | 16 | 16 | 8 |
Highest Ringelmann number permitted | 3** | 2** | 2 | 1 |
* When blowing soot or cleaning fires ** For a maximum duration of 3 minutes *** The number of smoke units is the product of the Ringelmann Number and the number of minutes the smoke is visible | ||||
User should interpolate for values not listed. Minus sign indicates value is to be subtracted from particulate standard. | |||||
Height of Emission | Velocity of Emission | Temperature of Emission | |||
Height of Emission Above Grade in Feet | Adjustment in Lbs./Hr./Acre | Exit Velocity in Feet per Second | Adjustment in Lbs./Hr./Acre | Temperature in Degrees Fahrenheit | Adjustment in Lbs./Hr./Acre |
User should interpolate for values not listed. Minus sign indicates value is to be subtracted from particulate standard. | |||||
Height of Emission | Velocity of Emission | Temperature of Emission | |||
Height of Emission Above Grade in Feet | Adjustment in Lbs./Hr./Acre | Exit Velocity in Feet per Second | Adjustment in Lbs./Hr./Acre | Temperature in Degrees Fahrenheit | Adjustment in Lbs./Hr./Acre |
50 | -0.01 | 0 | - | 200 | - |
100 | -0.06 | 20 | -0.03 | 300 | -0.001 |
150 | -0.1 | 40 | -0.09 | 400 | -0.002 |
200 | -0.16 | 60 | -0.16 | 500 | -0.003 |
300 | -0.3 | 80 | -0.24 | 1,000 | -0.01 |
100 | -0.5 | 100 | -0.5 | 1,500 | -0.04 |
2,000 | -0.1 | ||||
Heavy Industrial Uses | Other Uses |
At boundaries of nearest residential zone lot | At lot lines |
Rating
|
Restrictions
|
Incombustible to moderate burning | None |
Free to active burning to intense burning | Only in completely enclosed buildings with minimum 2-hr. fire-resistive construction that are either: 1. Protected with an automatic fire extinguishing system, or 2. Located at least 40 feet from all lot lines |
Maximum Gallons Above Ground
|
Maximum Gallons Below Ground | |||
Open Cup Flash Point in Degrees Fahrenheit | Heavy Industrial | Other | Heavy Industrial | Other |
Under 100 | 62,000 | 3,000 | No maximum | 100,000 |
100-139 | 100,000 | 10,000 | No maximum | 100,000 |
140 and over | 200,000 | 20,000 | No maximum | 100,000 |
Performance Standard For
|
Applies To
|
Heavy industrial uses | Conditional uses in I-1 |
Other uses | Conditional uses in all districts except I-1 |
Permitted uses in all districts | |
Unspecified | Permitted uses in all districts |
Conditional uses in all districts |
Preferred Center Frequency in Hertz | Maximum Permitted Sound Pressure Level in Decibels at Boundaries of Nearest Residentially Zoned Lot |
Preferred Center Frequency in Hertz | Maximum Permitted Sound Pressure Level in Decibels at Boundaries of Nearest Residentially Zoned Lot |
31.5 | 75 |
63 | 74 |
125 | 69 |
250 | 64 |
500 | 58 |
1,000 | 52 |
2,000 | 47 |
4,000 | 43 |
8,000 | 40 |
Above figures for octave band analyzers calibrated with preferred frequencies (American Standards Association S1.6-1960, preferred frequencies for acoustical measurement) Sound levels above shall be modified where applicable by the adjustments in Table 23 | |
Adjustment in Decibels | |
Duration of noise in any one-hour period (use one adjustment only): | |
Under 12 minutes | Add 5 dB |
Under 3 minutes | Add 10dB |
Under ½ minute | Add 15dB |
At boundaries of nearest office or commercial zoned lot | Add 5dB |
Noise is impulsive in character (such as, hammering) | Subtract 5dB |
Noise is periodic in character (such as, hum, screech) | Subtract 5dB |
Noise may be heard between hours of 7:00 p.m. and 7:00 a.m. | Subtract 5dB |
Maximum Permitted Particle Velocity* | ||
Use | At Adjacent Lot Line | At Nearest Residentially Zoned Lot Boundary ** |
Heavy Industrial | 0.2 | 0.02 |
Other | 0.1 | 0.02 |
* Where vibration is produced as discrete impulses (impact vibrations) not exceeding 100 per minute, maximum permitted velocities may be doubled ** Between 7:00 a.m. and 7:00 p.m., maximum permitted velocity at residentially zoned lot boundaries shall be reduced 50% | ||
During One-Hour Per 24-Hour Day* | All Other Times | |||
Heavy Industrial | Other | Heavy Industrial | Other | |
Maximum permitted smoke units *** per hour per stack | 32 | 16 | 16 | 8 |
Highest Ringelmann number permitted | 3** | 2** | 2 | 1 |
* When blowing soot or cleaning fires ** For a maximum duration of 3 minutes *** The number of smoke units is the product of the Ringelmann Number and the number of minutes the smoke is visible | ||||
User should interpolate for values not listed. Minus sign indicates value is to be subtracted from particulate standard. | |||||
Height of Emission | Velocity of Emission | Temperature of Emission | |||
Height of Emission Above Grade in Feet | Adjustment in Lbs./Hr./Acre | Exit Velocity in Feet per Second | Adjustment in Lbs./Hr./Acre | Temperature in Degrees Fahrenheit | Adjustment in Lbs./Hr./Acre |
User should interpolate for values not listed. Minus sign indicates value is to be subtracted from particulate standard. | |||||
Height of Emission | Velocity of Emission | Temperature of Emission | |||
Height of Emission Above Grade in Feet | Adjustment in Lbs./Hr./Acre | Exit Velocity in Feet per Second | Adjustment in Lbs./Hr./Acre | Temperature in Degrees Fahrenheit | Adjustment in Lbs./Hr./Acre |
50 | -0.01 | 0 | - | 200 | - |
100 | -0.06 | 20 | -0.03 | 300 | -0.001 |
150 | -0.1 | 40 | -0.09 | 400 | -0.002 |
200 | -0.16 | 60 | -0.16 | 500 | -0.003 |
300 | -0.3 | 80 | -0.24 | 1,000 | -0.01 |
100 | -0.5 | 100 | -0.5 | 1,500 | -0.04 |
2,000 | -0.1 | ||||
Heavy Industrial Uses | Other Uses |
At boundaries of nearest residential zone lot | At lot lines |
Rating
|
Restrictions
|
Incombustible to moderate burning | None |
Free to active burning to intense burning | Only in completely enclosed buildings with minimum 2-hr. fire-resistive construction that are either: 1. Protected with an automatic fire extinguishing system, or 2. Located at least 40 feet from all lot lines |
Maximum Gallons Above Ground
|
Maximum Gallons Below Ground | |||
Open Cup Flash Point in Degrees Fahrenheit | Heavy Industrial | Other | Heavy Industrial | Other |
Under 100 | 62,000 | 3,000 | No maximum | 100,000 |
100-139 | 100,000 | 10,000 | No maximum | 100,000 |
140 and over | 200,000 | 20,000 | No maximum | 100,000 |