Any enclosed or open industrial use creating intense earth-shaking vibrations such as are created by a heavy drop forge shall be set back from a residence or suburban district boundary at least 250 feet, and at least 150 feet from a business district boundary. Earth-shaking vibrations at the industrial property line shall not be in violation of this chapter as long as the vibration is not perceptible without the aid of instruments.
(Ord. CO-67-2, passed 2-21-67) Penalty, see § 155.999