No substances shall be placed or discharged into the municipal sewer system which will create a combustible, gaseous, explosive, or inflammable condition in the system, nor shall any substances or objects be placed or discharged into the municipal sewer system which will not dissolve and will thus cause an obstruction and clogging within the system. No petroleum products shall be placed or discharged into the municipal sewer system.
(Ord. 5-25-64-2, passed 5-25-1964) Penalty, see § 50.999