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