Packet: Tiffin City Council Work Session (09/15/2026)

CHAPTER 166 ESTABLISHMENT OF ZONING DISTRICTS AND THE OFFICIAL ZONING MAP b. Maximum Permitted Sound Level. Octave Bank Frequency Cycles per Second Decibels 0-74 58 75-149 54 150-299 50 300-599 46 600-1,199 40 1,200-2,399 33 2,400-4,799 26 4,800-over 20 c. Exceptions. The following uses and activities shall be exempt from the noise level regulations in the C-1S District: i. Noises not directly under control of the property user. ii. Noises emanating from construction and maintenance activities between 7:00 a.m. and 10:00 p.m. Such activities are those that are non-routine operations accessory to the primary activities, and that are temporary in nature, or conducted infrequently. iii. The noises of safety signals, warning devices, and emergency pressure relief valves. iv. Transient noises of moving sources such as automobiles, trucks, airplanes, and railroads. v. At no point along the boundary of a residential district or along an adjacent lot must the sound pressure level of any operation or plant exceed the decibel limits in the octave bands designated below. (2) Vibration a. Any commercial operation or activity that must cause at any time and at any point along the nearest adjacent lot line, earth borne vibrations in excess of the limits set forth in steady-state displacement as indicated in Column I* Section 168.18(14)(K)(2)(d) and Section 168.18(14)(K)(2)(e). b. In addition, any commercial operation or activity that must cause at any time and at any point along a residential district boundary line, earth borne vibrations in excess of the limits set forth in steady-state displacement as indicated in Co Column II* Section 168.18(14)(K)(2)(d) and Section 168.18(14)(K)(2)(e) is prohibited. c. Exceptions. The following uses and activities must be exempt from the vibration level regulations: CODE OF ORDINANCES, TIFFIN, IOWA - 1689 -