8.16.280: EMISSION OF DENSE SMOKE; INCINERATORS:
Incinerators may emit dense smoke not exceeding a shade or the equivalent capacity of the shade designated as no. 2 on the Ringelmann chart for periods not exceeding five (5) minutes in any sixty (60) minute period and not exceeding twenty (20) minutes in any twenty four (24) hour period. (Ord. 316 §19(g), 1970)