As the construction or maintenance work progresses, all public properties and private property shall be thoroughly cleaned of all rubbish, excess earth, rock and other debris, including windblown materials, resulting from the work or construction. Cleaning up the location of such properties or property shall be accomplished at the expense of the permittee and shall be completed to the satisfaction of the City Engineer before final acceptance of the work. From time to time as may be ordered by the City Engineer, and, in any event, immediately after completion of the work, the permittee shall, at its own expense clean up and remove all refuse and unused materials of any kind resulting from the work, and upon failure to do so within 24 hours after having been notified to do so by the City Engineer, the work may be done by the City and the cost thereof charged to the permittee, and the permittee’s bond shall be liable for the cost thereof. [Ord. 1021 § 19.05, 1961; Code 1970 § 12.24.260; Code 1954 § 4-5.104.]