Impose such conditions, in addition to those required, as are necessary to ensure that the general purpose and intent of the Master Plan and Zoning Ordinance are complied with and that the use of the property adjacent to the area of the proposed use is adequately safeguarded, which conditions may relate to, but are not limited to, harmonious design of buildings, appearance, plantings and its maintenance as a sight or sound screen, landscaping, hours of operation, lighting, number of persons involved, allied activities, ventilation, noise, sanitation, safety, smoke and fume control and minimizing noxious, offensive or hazardous elements.