Discussion and Review of Tiffin Municipal Code Revisions – Preparation for Setting the Public Hearing — Tiffin City Code - DRAFT

CHAPTER 166 ESTABLISHMENT OF ZONING DISTRICTS AND THE OFFICIAL ZONING MAP a. Smoke Emission. In the C-3 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 chart: Maximum Permitted Particulate Matter Emission Rate Height of Emissions Pounds per Hour (ft) (per Acre) 0-49 1.00 50-99 1.01 100-149 1.06 150-199 1.10 200-299 1.16 300-399 1.30 400-over 1.50 c. Method of Measurement. i. Smoke. To grade the density or equivalent opacity of emission of smoke, the Ringelmann Chart shall be employed. To determine smoke units, the Ringelmann reading shall be made at least every minute during the period of observation. Each reading (Ringelmann number) shall be multiplied by the time in minutes for which it is observed, and the products added together to determine the total number of smoke units observed during the total period of observation. ii. Particulate Matter. The total net rate of emission of particulate matter within the boundaries of any lot must be determined as follows: Determine the maximum emission in pounds per hour from each source of emission and divide this figure by the number of acres of lot area, thereby obtaining the hourly rate of emission in pounds per acre. Add together the individual rate of emission as derived above to obtain the total rate of emission from all sources of emission within the boundaries of the lot. This total shall not exceed the rate established in the table in Section 166.18(14)(K)(3)(b). CODE OF ORDINANCES, TIFFIN, IOWA - 1674 -