Response to Information Request - OPW13/0669

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                                                                                     Tree Inspection Report   -
                                                                                                                  Manyaii Chan
                                                                                 Site Address: 4 Habitat Place, Noosa Heads




      orl’
 roots during the repairs (approximately 150mm in diameter). There are no visible signs of canopy decline
 result ng from this root pruning; however the onset of decay often takes several years to become apparent.


 Root growth and development excelled within the excavated area as a result of back filling the rain water
 harvesting tanks area with Mary Valley Sand.

 WhilSl
 beco
        investigating the site characteristics on Sunshine Coast Regional Council My Maps website, it has
       e apparent that the immediate environment surrounding 4 Habitat Place has been mapped under the
 Noos Plan as a Flood Hazard Area, Minimum Floor Height, Acid Sulphate Soils & Bushfire Hazard. The
 adjoi ng allotment Weyba Creek Bushland Reserve South is mapped as a Biodiversity I Environmental Area.

 Despi e being mapped as a Bush Fire Hazard area, there is no fire contaminant line (buffer) between the rear
 boun aries of Habitat Place properties which adjoin this Weyba Creek Bushland Reserve South Environmental
 area.


 Acid   ulphate Soils will only become an issue in the event that soil is excavated, exposed to the air, which is
 highly unlikely considering the fact that the construction phase is complete.

 There is a sewer main contained within an easement, (apex in shape) which runs through 4 Habitat Place
 (refer 0 aerial imagery on page 2). Image 7 on page 4 shows an estimated projection of this easement with the
 manh Ie cover positioned beneath the pool deck. This easement runs through the structural Root Zone of this
 Eucal ptus tereticornis (Forest Red Gum) thus making it difficult to maintain easement infrastructure. Based
 upon        ite projections ArborCare Queensland believes the centre of this easement to be situated approx. 2.2m
 to 2.7       from edge of the tree.


 A su    y drawing of 4 Habitat Place, Noosa Heads classifies the soil type as a Silt Clay Soil. Typically clay soil
 types        re associated with a
                              phenomena called expandable clays (Shrink Swells)
 Shrink Swell occurs as a result of changes in the moisture content of clay-rich soils. This is reflected in a
 chang in volume of the ground through shrinking or swelling. Swelling pressures can cause heaving, or lifting,
 of stru tures whilst shrinkage can cause differential settlement.


 The         by which the ground can shrink and I or swell is determined by the water content in the near

 and th
        arount
 surfac and the type of clay. Considering the size and stature of this Eucalyptus tereticornis (Forest Red Gum)
               current environmental weather conditions there is the possibility that this phenomena may become a
 proble        as the tree matures and weather patterns   change.




 Consultin Arborist: Phillip Best
                         Dip. Arb, Nat. Cert. Hort                                                                Page 8/10