Response to Information Request - OPW13/0669

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




Nigel Clark of International Home Brokers has advised ArborCare Queensland that the house was constructed
in Jul 2001, (approx. 12 years ago).


The ustralian Standard AS4970 -2009 Trees on Development was not in affect at the time of this property
devel pment and installation of the rain water harvesting tanks. However despite this fact there was other
inter ationally recognised criteria for managing trees (at this time) such as the British Standard 5837 ’Trees in
Relat on to Construction’.


The   on of the proprietor Manyaii Chan was very nearly injured from a branch being shed from this Eucalyptus
tereti ornis (Forest Red Gum) whilst playing in the rear yard earlier this year. ArborCare Queensland was
unable to see where the branch had failed from during our ground based visual tree inspection. An aerial
climbing assessment and consultation with the proprietor Manyaii Chan is required to ascertain the reason
behin       this failure.

Ther        are a few dead branches (deadwood)within the canopy of this    Eucalyptus tereticornis (Forest Red Gum)
whic         is a natural characteristic of trees (refer image 5 page 4). Remedial tree pruning can successfully
rem     I   iate any risk of branch failure and subsequent injury or damage to property.


The t ee is on a slight lean towards the house resulting from phototrophic growth during its development.
Ther        are usually more roots on the tension side (back side of the lean) to anchor the tree against the lean.
Ther        are no obvious signs of any recent site disturbance within the Weyba Creek Bushland Reserve South,
thus        inimising root plate instability.

Chari e Gilbert           Plumbing     &   Draining   Coolurn installed three   underground   rain water     harvesting tanks
appro imately 5 to 6 years ago, in accordance with the (former) Noosa Shire Council approval. Each tank is
appro imately 4.5m long by 2.5m wide. ArborCare Queensland’s assessment has measured the distance from
the ra n water harvesting tank lid to the edge of the tree, with the resultant being is 6.5m.

An aPt roximate area of 5.1 m long by 8.5m (refer to image 8 on page 4) was excavated during the installation
proce s and back filled with Mary River Sand due to the clay content of site soil. These excavations has
unfort nately resulted in the Structural Root Zone of this Eucalyptus tereticornis (Forest Red Gum) being
comp omised.

Bas          upon the information supplied by Charlie Gilbert Plumbing & Draining Coolum and site layout the
excav       tion zone would terminate approximately 1.5m away from the edge of the tree. That is an encroachment
of 1.4 m within the projected Structural Root Zone.


The e ent and severity of damage cannot be quantified from our visual assessment, and would require further
diagn stic investigations to confirm the extent of damage to the root system.

Interf rence or destruction of a trees root system will have a pronounced and visual effect on the trees health,
appe ranee and stability, for example the dying of limbs on the side that was injured, premature leaf fall, death
or simIy fall over.

With        ny root damage there is the possibility of fungi entering the tree through damaged roots. Depending
upon        he pathogen that enters the damaged root area it may take several or many years before the tree
declin      s or fails.


In 2010 Charlie Gilbert Plumbing & Draining Coolum has repaired the tank closest to the rear
                                                                                               boundary due to
the lift ng of the tank from Eucalyptus tereticornis (Forest Red Gum) roots. Charlie advised that he had to cut



Consulti g Arborist: Phillip Best
                     Dip. Arb, Nat. Cer!. Hor!                                                                             Page 7/10