(A) This section applies to a legal lot which is to be developed with one single family residence, or to two contiguous legal lots which are to be developed or redeveloped by the same developer with one or two single family residence(s), or in connection with which additional or expanded improvements resulting in additional impervious cover is proposed.
(B) Three copies of a preliminary site plan showing the information required in this section shall be submitted with the development permit application. Only the following information will be required for submittal if the lot or lots are not otherwise exempt from the requirements of this chapter:
(1) Legal description of the property;
(2) Name and address of the owner/developer;
(3) Name and address of the company or individual who prepared the site plan;
(4) A topographic map with two-foot contours based upon City of Austin data showing;
(a) The horizontal limits and elevations of the 100 and 25-year floodplains with a citation of the source of the information;
(b) Locations of the Critical Water Quality Zone (CWQZ) and the Water Quality Transition Zone (WQTZ);
(c) Location of all trees having a trunk with a four-inch diameter or greater as measured four and one-half feet above the ground;
(d) Existing geologic features including but not limited to faults and fractures along waterways and other critical environmental features (CEF) as defined herein;
(e) Location of all proposed improvements including buildings, streets, driveways, storm drainage systems, water supply and distribution systems, wastewater collection systems or wastewater treatment and disposal systems;
(f) Location and description of all temporary erosion/sedimentation controls and permanent water quality controls, if such controls are required;
(g) Changed drainage patterns from the property after completion of construction;
(h) Final grades of all topography, structures, drainage ways, parking and driveways;
(i) Location of existing and proposed drainage easements;
(5) With respect to any fill proposed to be deposited, the identity of the source of any fill material to be deposited, and the certification of the owner of such fill that same does not contain any hazardous or toxic substances or materials.
(7) Other information as the city may reasonably require, including but not limited to the information specified in § 150.327(C) below.
(C) For an existing legal lot to which this section applies, a variance, administrative approval, or modified administrative approval, pursuant to the applicable provisions of § 150.323 is required to develop any portion of the lot that lies within the Development Free Zone.