A site plan showing location, proposed use and height of all buildings; location of all parking and truck-loading areas, with access and egress drives thereto; location and proposed development of all open spaces, including parks, playgrounds and open space reservations; location of outdoor storage, if any; location of all existing or proposed site improvements, including drains, culverts, retaining walls and fences; description of method of sewage disposal and location of such facilities; location and size of all signs; location and proposed development of buffer areas; location and design of lighting facilities; and the amount of building area proposed for nonresidential uses, if any.