It is hereby ordained and enacted by the Borough Council of the Borough of Churchill, County of Allegheny, Commonwealth of Pennsylvania, that from and after the passage and approval of this chapter, the several classes of districts specified herein shall be established, and the following regulations shall be in full force and effect. The provisions of this chapter shall be held to be the minimum requirements for the protection of the health, safety and welfare of the people at large and are designed to encourage the establishment and maintenance of reasonable community standards of physical environment.