1890 Effluent Disposal Review · MCU20/0022

2     Site Description
2.1   Land Description
      The allotment is 3.777ha in area, and generally of taper, elongated rectangular shape.
      Regionally the allotment is upon a broad, drainage deficient plain. There are a number
      of shed/ residential structures (3) established and visual evidence of placed fill over
      various areas.

      Three separate construction areas advised-:

       - residential structure to rear lot third
       - detached cottages (3) within the central lot third

      It is understood all residential / cottage structures are to be established as 'slab-on-
      ground'. It is anticipated all building areas will be subject to some filling. All existing fill
      should be deemed as 'uncontrolled'. It is also suggested all existing filling within the
      building areas should be removed and replaced in a professional manner. On-site
      effluent disposal required with tank water supplied. Photographs attached.

2.2   Vegetation
      Cleared melaleuca bushland with large gum trees over higher contours(main residence).
      Groundcover includes short/ long pasture grasses. Refer to photographs.

2.3   Crossfall
      Contours within identified building areas are shown on PLATE 1/ 2 and 3. Also on PLATE
      6 are contours and Council's flood inundation line. In general contours fall to the west
      and broadly divergent within the rear lot half. Contour generally range from RL 10 metres
      to 8 metres. The Q100 appears to be around RL 8.3 metres. Earthworks has included
      minor filling to the main residence area and moderate filling within the adjoining cottages
      areas.

2.4   Drainage
      The Council flood contour overlay plan attached as PLATE 6 and appears to
      approximate RL 8.3 metres. Poor/ very poorly drained allotment. The Council Flood
      Study is attached as APPENDIX B.

2.5   Regional Geology
      A regolith of the Tiaro Coal Measures that is typically represented by leached, kaolinised
      clays based on siltstone, mudstone and sandstone rock types. A veneer of sandy
      'slopewash' can overlie the clay profile.

2.6   Soil Investigation
      To establish representative details, ten boreholes were advanced at selected locations.,
      Test locations are shown on PLATE 2/3 with subsoil profiles/ test values in APPENDIX
      A. Boreholes advanced by a small vehicle mounted drilling rig and dynamic cone
      penetrometer testing at selected locations.



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