§ 105-98. Vibration.

A. 

Definitions. For the purpose of this section, the following terms are defined as follows:

FREQUENCY

The number of oscillations per second of a vibration.

IMPACT VIBRATIONS

Earthborne oscillations occurring in discrete pulses at or less than 100 per minute.

STEADY-STATE VIBRATIONS

Continuous earth-borne oscillations. Discrete pulses that occur more than 100 times per minute shall be considered to be "steady-state vibrations."

THREE-COMPONENT MEASURING SYSTEM

A device for recording the intensity of any vibration in three mutually perpendicular directions.

B. 

Method of measurement. For the purpose of measuring vibration, a three-component measuring system approved by the administrative official shall be employed.

C. 

Maximum permitted steady-state and impact vibration displacement.

(1) 

Table.

		Vibration Displacement (inches)
	Frequency (cycles per second)	Steady-State	Impact
	Under 10	0.0005	0.0010
	10 - 19	0.0004	0.0008
	20 - 29	0.0003	0.0006
	30 - 39	0.0002	0.0004
	40 and over	0.0001	0.0002

(2) 

In the ED-A District, no activity shall cause or create a steady-state or impact vibration on a lot line with a vibration displacement by frequency bands in excess of that indicated in the table above.