(a) If the Planning Commission finds that land proposed to be subdivided is unsuitable due to flooding, bad drainage, steep slopes, rock formations and other such conditions as may increase the danger to health, life or property or aggravate erosion or flood hazards, and if, from adequate investigations conducted by all the public agencies concerned, it is determined that, in the best interest of the public, the land should not be platted and developed for the purpose proposed, the Commission shall not approve such subdivision unless adequate methods are formulated by the subdivider for meeting the problems created by such subdivision of land.
(b) The Commission may refuse to approve what it considers to be a scattered or premature development or subdivision of land which may involve danger or injury to the public health, safety, welfare or prosperity by reason of lack of adequate water supply, schools, proper drainage, good roads and transportation facilities or other public services, or which would necessitate an excessive expenditure of public funds for the supply of such services, such as undue maintenance costs for adequate roads.