In all requests for approval of conditional uses, the burden of proof shall be on the applicant. The Planning Board shall give due consideration to all reasonable elements which could affect the public health, welfare, safety, comfort and convenience, such as but not limited to the proposed use, the character of the area, vehicular travel patterns and access, pedestrian ways, landscaping, lighting, signs, buffers, drainage, sewage treatment, potable water supply, utilities and building and structure location(s) and orientation(s). Any conditional use shall require Planning Board site plan review and approval before the issuance of a building permit or certification of occupancy. A site plan containing the information required in Chapter 327, Land Subdivision and Site Plan Review, of the Code of the Borough of East Rutherford shall be filed with the Planning Board. The Planning Board shall, in considering said site plan, obtain a report of the Police Department, which shall be incorporated into its report. No conditional use shall be favorably acted upon by the Planning Board unless it shall first deem that the proposed use can be conducted at the proposed site and as depicted on the site plan without causing undue traffic congestion or affecting in a deleterious manner the flow of traffic on the public streets adjacent to the proposed use.