PERFORMANCE STANDARDS.
The following are maximum accepted levels of noise, vibration, smoke, particulate matter and toxic and noxious matter allowable for industrial uses. If the proposed use is to emit sanitary sewage effluent containing industrial wastes or other effluent into City of Blue Mound sanitary sewage system which is considered by the City of Engineer to be unusual to or be damageable to the sanitary sewage systems, a description of methods of pretreatment of the effluent must accompany the development site plan.
The performance standards report may be waived by the Zoning Administrator if the proposed use is considered not to produce the listed effects.
Noise: The day-night average sound level at the property line shall not exceed seventy-five (75) decibels, unless the property line adjoins property zoned for residential uses where the maximum day-night average sound level shall not exceed sixty-five (65) decibels. The day-night average sound level (ldn) is the twenty-four (24) hour average sound level, in decibels, obtained after addition of ten sound decibels to sound levels in the night from 10:00 ten (10) decibels to sound levels in the night [sic] from 10:00 p.m. to 7:00 a.m.
Vibration: At the point of measurement taken on the property line of the source property which has the highest reading, the sound pressure level or impact level of any operation or plant shall not exceed the decibel limits for the octave bands designated in Column I below, unless the point of measurement is located on a property line which is also the boundary line of a residential district in which case the limits set forth in Column II shall apply.
Smoke, Particulate Matter and Visible Emissions: Smoke or visible emissions emitted from any vent, stack, chimney, skylight, or window shall [not] exceed an opacity of twenty (20) percent averaged over a five (5) minute period. Any emission of air pollutant must be in accordance with the requirements of the State of Texas. Emissions shall not exceed any of the following net ground level concentrations:
1.
One hundred micrograms per cubic meter of air sampled averaged over any five consecutive hours.
2.
Two hundred micrograms per cubic meter of air sampled, averaged over any three consecutive hours.
3.
Four hundred micrograms per cubic meter of air sampled, averaged over any one hour.
Toxic and Noxious Matter: The handling[,] processing, storage and disposal of hazardous, toxic, or noxious materials within this District shall be in accordance with applicable State and Federal laws and regulations. In addition, the Planning and Zoning Commission may establish additional performance standards, including setbacks, berms, and buffers, for the sitting of facilities which handle, treat, store, or dispose of potentially hazardous or dangerous materials.
Additional Standards: The Planning and Zoning Commission may establish additional performance standards to protect neighboring areas and land uses from potential industrial hazards and nuisances.