It is hereby recognized that certain uses may be necessary to serve the needs and convenience of the City, but which uses may become detrimental to the public health, safety and general welfare if not controlled under proper conditions and therefore require special consideration of existing and probable future conditions and characteristics of the surrounding area. Such uses are hereby declared to be special exception uses and may be permitted upon application to and approval by the Zoning Hearing Board, provided said use is shown as a special exception use in the zoning district schedule for the district in which the use is located and subject to the considerations as set forth in § 600-408.