No person shall operate or cause to be operated on any street, highway, public place, stream or waterway, or private premises within the city any internal combustion engines of any motor vehicle, boat or other vehicle, while stationary or moving, which emits from any source whatsoever any air contaminant for a period or periods aggregating more than 3 minutes in any 1 hour which meets the following specifications.
   (A)   Is dark or darker in shade as that designated as No. 2 on the Ringlemann Chart, as published by the United States Bureau of Mines; and
   (B)   Is of an opacity as to obscure an observer’s view to a degree equal to or greater than does smoke described in division (A) above.
(Prior Code, § 90.040)  (Ord. 3522, passed 1-23-1967)  Penalty, see § 10.99