The Superintendent and other duly authorized city employees bearing proper credentials and identification shall be permitted to enter all private properties through which the city holds an easement for the purposes of, but not limited to, inspection, observation, measurement, sampling, repair and maintenance of any portion of the sewerage works lying within the easement. All entry and subsequent work, if any, on the easement shall be done in full accordance with the terms of the easement pertaining to the private property involved.