No alteration of the existing natural configuration and elevation of any lands or lots shall be made without the permission of the Borough Engineer. Such permission shall be granted only where it is demonstrated that by reason of exceptional topographical conditions or physical features uniquely affecting a specific piece of property such alteration is necessary for the exercise of a permitted use of such property. Such permission will only be granted to the extent absolutely necessary to render the premises suitable for such permitted use. The decision of the Borough Engineer may be appealed to the Board of Adjustment or to the Planning Board in connection with an application for subdivision or site plan approval.