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

CHAPTER 166 ESTABLISHMENT OF ZONING DISTRICTS AND THE OFFICIAL ZONING MAP e. Maximum Permitted Impact Vibration Displacement Level. Impact Vibration Impact Frequency DisplacementA (in.) DisplacementA (in.) (Maximum Adjacent (Cycles per second) (Maximum Adjacent Commercial and Residential Uses) Industrial Uses) 0-9 0.0016 0.0006 10-19 0.0010 0.0003 20-29 0.0006 0.0002 30-39 0.0004 0.0001 40-over 0.0002 0.0001 A Impact vibrations, for purposes of this Code, are vibrations that occur in discrete impulses separated by an interval of at least one minute and numbering not more than eight in any 24-hour period. (3) Smoke and Particulate Matter. The emission, from all sources within any lot, or particulate matter containing more than five percent by weight of particles having a particle diameter larger than 44 microns is prohibited. Dust and other types of air pollution borne by the wind from such sources as storage areas, yards, and roads within the boundaries of any lot must be kept to a minimum by appropriate landscaping, paving, oiling, or other acceptable means. Emission of particulate matter from such sources in excess of the weight limitations specified herein is prohibited. The emission of smoke or particulate matter of a density or equivalent opacity equal to, or greater than, Ringelmann Chart No. 2 is prohibited at all times, except as otherwise provided herein. (The Ringelmann Chart is the chart published by the United States Bureau of Mines.) a. Smoke Emission. In the C-1B District, the emission of more than 12 smoke units per stack in any one-hour period is prohibited. However, once during any six-hour period each stack shall be permitted up to 12 additional units in a 15-minute period for soot blowing and fire cleaning. Only during such 15-minute periods shall smoke of a density or equivalent opacity equal to, but not exceeding, Ringelmann Chart No. 3 be permitted, and then only for fire cleaning and for not more than four minutes per period. b. Particulate Matter. The rate of emission of particulate matter from all sources within the boundaries of any lot shall not exceed the rate established in the following table: Maximum Permitted Particulate Matter Emission Rate Pounds per Hour Height of Emissions (ft) (Per Acre) 0-49 1.00 50-99 1.01 100-149 1.06 150-199 1.10 CODE OF ORDINANCES, TIFFIN, IOWA - 1642 -