(A) Use, Lot and Bulk Regulations (Performance Standards, Vibration): Any use established in the Light Industrial District after April 1, 1963 shall be so operated as to comply with the performance standards governing vibration set forth hereinafter. No use lawfully established on April 1, 1963 shall be so altered or modified as to conflict with, or further conflict with, the performance standards governing vibration established hereinafter.
(B) Light Industrial District (Performance Standards, Vibration):Any industrial operation or activity which shall cause at any time and at any point along the nearest adjacent lot line, earth-borne vibrations, (other than background vibrations produced by some source not under control of this Title, such as the operation of motor vehicles or other transportation facilities) in excess of the limits set forth in Column I of the following table is prohibited. In addition, any industrial operation or activity which shall cause, at any time and at any point along a residence district boundary line, earth-borne vibrations in excess of the limits set forth in Column II of the following table is prohibited. Vibration shall be expressed as displacement in inches and shall be measured with a three-component measuring system approved by the Enforcing Officer.
Frequency (Cycles Per Second)
| I* Displacement (Inches)
| II* Displacement (Inches)
|
0 to 10 | .0008 | .0004 |
10 to 20 | .0005 | .0002 |
20 to 30 | .0002 | .0001 |
30 to 40 | .0002 | .0001 |
40 and over | .0001 | .0001 |
*Steady State: Vibrations, for the purpose of this Title, which are continuous or, if in discrete pulses, are more than one hundred (100) per minute. Impact vibration, that is, discrete pulses which do not exceed one hundred (100) impulses per minute shall not cause in excess of twice the displacements stipulated.