Conditions are being imposed on the grant of the request necessary to ensure that the general purpose and intent of the property adjacent to the area included in the proposed special exception is adequately safeguarded with respect to harmonious design of buildings, aesthetics, planting and its maintenance as a sight or sound screen, landscaping, hours of operation, lighting, numbers of persons involved, allied activities, ventilation, noise, sanitation, safety, smoke and fume control and the minimizing of noxious, offensive or hazardous elements.