The AA Residential District is intended to:
(1) Provide for farming, conservation, recreation and low-density single-family detached dwellings on lots of sufficient size for on-lot sewage disposal systems.
(2) Facilitate agriculture, conservation, recreation, low-density residential and open space uses that preserve the remaining natural resources within this area.
(3) Protect streams, valleys, vegetation and the natural contours and condition of the land.
(4) Facilitate the conservation and proper utilization of groundwater supplies and control of pollution, surface water flooding and erosion.