Buildings, structures, aboveground utilities, parking lots, access drives or other improvements shall not be installed within the limit of disturbance. Underground utilities may be installed within the limit of disturbance where necessary or required but must be installed in a manner to minimize disturbance of the existing area and not create a direct line of sight to existing or proposed improvements on the industrial zone property from an abutting residential zone or use. Trees, landscaping, fences, sound barriers and other improvements may be installed in the limit of disturbance as deemed necessary by the Board to enhance the existing buffer.