Minimum lot size shall be 7,500 square feet. A site plan showing the location of all buildings, tanks, service pumps and driveways, together with all measurements necessary to show compliance with these standards noted thereon, shall be filed with the written application. Service pumps shall not be located within twenty-five feet of any building occupied as a residence or occupied for church, school, or other institutional purposes. Service pumps shall not be located within fifteen feet of the right-of-way line of any street.