The purpose of a Mixed-Use Overlay District (hereafter referred to as "MUD") is to provide for a wide range of residential, commercial, business, professional office and light industrial uses and to provide for accessory uses and compatible public and semipublic environment by fostering innovative building and open space masses resulting in an aesthetically attractive working environment. Such uses shall be able to meet comparatively rigid specifications as to nuisance-free performance and shall be clean, free of objectionable elements and shall operate entirely within enclosed structures. This district is intended to be created in situations where, because of special circumstances, the area is adequate to accommodate the uses, which can be reasonably buffered from adjoining residential areas.