In all requests for approval of conditional uses, the burden of proof shall be on the applicant. The Board of Adjustment 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). A site plan approval shall be required for all conditional uses.