In considering and acting upon site plans and development approval plans, the Planning Board shall take into consideration the recommendations of the "Master Plan -- 1990 of the Town of Putnam Valley," the health, safety and welfare of the public in general and of the residents, employees, visitors or guests of the proposed development and of the immediate neighborhood in particular and may prescribe such appropriate conditions and safeguards as may be required in order that the result of its action shall, to the maximum extent possible, encourage the most appropriate use of the land, taking into account the size, location, height, bulk, appearance, character and suitability of all buildings and facilities; the safety, adequacy and convenience of vehicular and pedestrian traffic ways, parking and loading areas, access drives and areas related thereto; and the topography, landscaping and open spaces in relation to each other, to pedestrian and to vehicular traffic and to protection of adjacent properties.