§ 38-1454. Vibration.

(a)

No operation or use in any of the industrial districts shall, at any time, create earthborne vibrations which, when measured at the bounding property line of the source of operation, exceed the limits set forth in the following tables:

MAXIMUM PERMITTED VIBRATION IN THE C-3 COMMERCIAL DISTRICT, OR THE I-1, I-2 OR I-3 DISTRICT

Frequency in Cycles    per Second	Acceleration G's Single Amplitude
1	.00062
2 to 5	.00084
5 to 10	.00055
10 to 20	.0014
20 to 50	.004
Over 50	.0092

 

MAXIMUM PERMITTED VIBRATION IN I-4 OR I-5 DISTRICT

Frequency in Cycles    per Second	Acceleration G's Single Amplitude
1	.016
2 to 5	.02
5 to 10	.012
10 to 20	.015
20 to 50	.026
Over 50	.046

 

(b)

Vibration shall be measured by normal vibration analysis equipment with associated transducer mounted vertically on two-inch pipe driven into the ground at least three (3) feet.

(P & Z Res., art. XVIII, § 4)