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

CHAPTER 166 ESTABLISHMENT OF ZONING DISTRICTS AND THE OFFICIAL ZONING MAP K. Technical Provisions. (1) Noise a. To measure the intensity and frequency of sound, the sound level meter, the octave band analyzer, and the impact noise analyzer may be employed. The flat network and the fast meter response of the sound level meter may be used. Sounds of short duration that cannot be measured accurately with the sound level meter may be measured with the impact noise analyzer. Octave band analyzers calibrated in the preferred frequencies (American Standards Association S1 6-1960, Preferred Frequencies for Acoustical Measurements) must be used with the following tables. The suspected perpetrator will be required to hire, at the approval of the City, a consultant to measure, record, and report to the Council results about compliance with this Code. All costs shall be the responsibility of the property owner. 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-1B 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 CODE OF ORDINANCES, TIFFIN, IOWA - 1640 -