Applicants for public utility installations must prove that the proposed installation is necessary for the efficiency of the public utility system or needed to provide satisfactory service to the neighborhood or area in which the use is to be located. The applicant must further show that the design of any building to be erected in connection with such facility which is to be located in a residential area conforms to the general character of the residential area and will not adversely affect the safety, comfort and enjoyment of property in the zone in which it is located. The applicant must also provide for adequate and attractive fencing and other safety devices and sufficient landscaping including shrubs, trees and lawns, and must further agree to maintain such landscaping.