The Utilities Superintendent or other duly authorized employees of the city bearing proper credentials and identification shall be permitted to enter all private properties through which the city holds a duly negotiated easement for the purposes of but not limited to inspection, observation, measurement, sampling, repair and maintenance of any portion of the wastewater facilities 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 duly negotiated easement pertaining to the private property involved.