The removal of earth from all zoning districts of the Town of Medfield shall be permitted only after special permission of the Select Board and under these rules and regulations. The Select Board shall grant no such permit except in conjunction with the construction of subdivision streets approved by the Planning Board; public works or other municipal projects approved by a public authority; or private land development where the Select Board find that no reasonable alternative contour plan is practicable, and, in that event, that minimal disruption of the natural contours of the site may be permitted. Furthermore, the Select Board shall grant no such permit as would, in their opinion, adversely affect the scheme of growth laid down in the Zoning Bylaw or elsewhere, or the economic status of the Town, or tend to impair the beauty of the Town, or of the district most immediately affected, or result in health or other hazards.