All public off-street parking, off-street loading and service facilities shall be so drained as to prevent damage to abutting properties or public streets and shall be constructed of materials which will assure a surface resistant to erosion. Such drainage and materials shall be installed as required by the City Engineer. All such areas shall be maintained at all times at the expense of the owners thereof, in a clean, orderly and dust-free condition. All parking areas and driveways shall be constructed in accord with the City Engineering Department design standards.