Drainage. All newly constructed or enlarged parking areas, including associated driveways and vehicle maneuvering areas, shall have adequate provisions to prevent surface water from draining to or across adjoining properties, sidewalks or streets during, at a minimum, a ten-year storm event, and shall comply with the provisions of Chapter 235, Stormwater Management, Part 1, Stormwater Management and Erosion and Sediment Control. Stormwater runoff shall be designed to not flow across any public sidewalk to a stormwater facility. All drainage systems in existing parking areas shall be maintained in good working order.