If the Planning Commission finds that land proposed to be subdivided is unsuitable for subdivision development due to flooding, poor drainage, topography, inadequate water supply, schools, transportation facilities and other such conditions which may endanger health, life or property; and, if from investigations conducted by public agencies concerned, it is determined that in the best interest of the public the land should not be developed for the purpose proposed, the Commission shall not approve the land for subdivision unless adequate methods are advanced by the subdivider for solving problems that will be created by development of the land.