FINAL_Arborist Report_22 Nylana Way, Doonan_Chris Townsend

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Contents
  1.    Introduction ...................................................................................................................................... 2
  1.1       Brief ............................................................................................................................................... 2
  1.2       Qualifications and Experience....................................................................................................... 2
  2.    Site Visit and Observations ............................................................................................................... 2
  2.1       Site Visits ....................................................................................................................................... 2
  2.1.1         Tree Species .............................................................................................................................. 2
  3.    Inspection Results: ............................................................................................................................ 3
  4.    Conclusion: ........................................................................................................................................ 3
  5.    Site Images ........................................................................................................................................ 4
  6.    Recommendations: ........................................................................................................................... 5
  7.    Appendix 1 - Explanatory Notes........................................................................................................ 6
  8.      Appendix 2 – Disclaimer................................................................................................................... 7




 Version                       Date                             Authored                          Reviewed                         Validated
 Draft                         14/09/2023                       BH                                WG
 F1
 F2




Arborist Brief– TSA: 22 Nylana Way, Doonan
Treesafe Australia Pty Ltd. September 2023©                                                                                 Page 1|7

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1. Introduction
1.1 Brief
Treesafe Australia Pty Ltd has been engaged by Chris Townsend to carry out an inspection of
trees surrounding the proposed house site at Doonan. The arborist brief shall include inspection
notes identifying finding from the site visit and recommendations for tree removals and pruning to
minimise potential hazards post construction.

1.2 Qualifications and Experience
The provisions of the arborist brief are based upon site observations from ground level and the
data captured onsite upon the day of assessment. The consulting arborist, Brett Hames has
attained an AQF level 5 in Arboriculture (Diploma of Arboriculture AHC 50510).

2. Site Visit and Observations
2.1 Site Visits
The consulting arborist liaised with Chris Townsend, property owner of 22 Nylana Way, Doonan
on site to discuss the arborist brief on the 15th of September 2023.
A site inspection was carried out to collect data for the provisions of the arborist brief. The arborist
brief is based upon the evidence gathered at the time the assessment.
All tree inspections are performed from ground level without detailed investigation unless
otherwise noted within the assessment. The method of inspection performed was a basic level 2
visual tree assessment (VTA) as per ISA guidelines, ANSI A300 Standard for Risk assessment
and ISA’s Best Management Practices: Tree Risk Assessment.

2.1.1 Tree Species
 Species                                             Tallowwood, (Eucalyptus microcorys)
 Height (Meters)                                     20
 Canopy Spread (Meters)                              7m balanced
 Age Class                                           Semi-mature


 Species                                             Turpentine, (Syncarpia glomulifera)
 Height (Meters)                                     16
 Canopy Spread (Meters)                              5m balanced
 Age Class                                           Semi-mature


Several other larger species are located around the house site. They include Flooded Gum
(Eucalyptus grandis), several Tallowwood (Eucalyptus microcorys), Red Stringybark
(Eucalyptus resinifera), Turpentine (Syncarpia glomulifera).

Arborist Brief– TSA: 22 Nylana Way, Doonan
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3. Inspection Results:
On the day of inspection, the site had recently been cut and filled in order to commence
construction works. The cut is on the south and east sides with the fill being to the north and west
sides to gain a level pad. Remaining trees surrounding the site appear to be showing good vigour
at the time of inspection. Some deadwood is present, this is typical of species and maturity.
A Tallowwood (tree 1) and Turpentine (tree 2) at the eastern boundary have sustained significant
damage to the root zone as the site cut is all the way to the base of the trees. A larger Tallowwood
to the north of these has also has an incursion into the TPZ (Tree Protection Zone) in the site
preparation process.
Multiple larger species include a Flooded Gum, several Tallowwood, a Red Stringybark, and a
Turpentine. These are located to the east and southern sides of the house site. Their canopies
encroach towards the proposed construction. The aforementioned Flooded Gum at the
northeastern corner of the site has already had recent encroachment pruning. A Turpentine is
located at the western side of the house site. This tree doesn’t encroach on the property; however,
it is bifurcated with a co dominant leader starting mid-way on the trunk. Approximately 40% of the
eastern side of the root zone is covered with fill from the site cut.
Trees inspected are only those as directed by Chris Townsend.

4. Conclusion:
In conclusion to the inspection results, the Tallowwood (tree 1) and Turpentine (tree 2) at the
eastern boundary have up to 50% incursion to the TPZ. As per AS 4970-2009 Protection of Trees
on Development Sites, it states that an incursion of any more than 10% is considered a ‘major
encroachment’ and certain conditions should apply. These 2 particular trees have sustained
damage too great to be able to retain them. I recommend removal of the trees to low stumps and
any herbicide application to be avoided to prevent possible translocation to the surrounding trees
of the same species. If the stumps are to be removed, I suggest stump grinding opposed to
excavation in order to prevent further damage to surrounding trees.
Regarding the multiple larger species located around the site. This encroachment/deadwood
pruning will be classed as maintenance work. Prune according to AS 4373 Pruning of amenity
trees. Work should be performed by a minimum Cert 3 qualified arborist. The Turpentine at the
western side of the house site has fill over approximately 40% of the root zone. This may limit
water and oxygen uptake to this part of the root zone resulting in declining health of this tree.
Follow up consultations by a diploma qualified arborist should be scheduled at 6-month intervals
to check on the health and vigour of the retained trees.
Any trees with excavation within the root zones require canopy reduction pruning to minimise
destabilization caused by work conducted within the TPZ. The general increase of exposure to
the elements due to the clearing work are also a contributing factor to this potential destabilisation.




Arborist Brief– TSA: 22 Nylana Way, Doonan
Treesafe Australia Pty Ltd. September 2023©                                    Page 3|7

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5. Site Images




   Image 1- Depicting Tree 1 and 2 at         Image 2- Depicting trees 1 and 2
   the eastern side of the site cut.          looking north to south showing
                                              damage to root zone.




     Image 3- One of the ‘larger species’     Image 4- Fill over one side of the
     requiring encroachment pruning           root zone of the Turpentine located
     over building site.                      on the western side of building site.


Arborist Brief– TSA: 22 Nylana Way, Doonan
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6. Recommendations:
   •   Ensure all works are carried by a qualified arborist team with AQF 3 or equivalent
       experience within the field of arboriculture.

   •   Ensure all works are carried out within the guidelines of AS 4373, Pruning of amenity
       trees.

   •   Avoid use of herbicide on stumps of any trees to be removed.

   •   Grind opposed to excavate stumps at edge of cutting if stump removal is required.

   •   Engage a Diploma qualified arborist for follow up inspections at 6 monthly intervals.

   •   Refer to the development guidelines AS 4970 Protection of trees on development sites.

   •   Refer to the guidelines of Noosa Shire Councils tree management principles.

   •   Retaining of the site cut and batters to prevent or minimise erosion.




Arborist Brief– TSA: 22 Nylana Way, Doonan
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7. Appendix 1 - Explanatory Notes

•      Mathematical abbreviations: > = Greater than; < = Less than.
•     Measurements/estimates: All dimensions are estimates unless otherwise indicated.
Measurements taken with a tape or clinometer are indicated with a ‘+’. Less reliable estimated
dimensions are indicated with a '?'.
•         Species: The species identification is based on visual observations and the common
English name of what the tree appeared to be is listed first, with the botanical name after in
brackets. In some instances, it may be difficult to quickly and accurately identify a particular tree
without further detailed investigations. Where there is some doubt of the precise species of tree,
it is indicated with a '?' after the name in order to avoid delay in the production of the report. The
botanical name is followed by the abbreviation sp if only the genus is known. The species listed
for groups and hedges represent the main component and there may be other minor species not
listed.
•      Height: Height is estimated to the nearest metre.
•       Spread: The maximum crown spread is visually estimated to the nearest metre from the
furthest extent of live lateral branches on one side of the canopy to the tips of the live lateral
branches on the opposing side of the canopy.
•      Diameter: These figures relate to 1.5m above ground level and are recorded in
centimetres. If appropriate, diameter is measure with a diameter tape. ‘M’ indicates trees or
shrubs with multiple stems.
•       Estimated Age: Age is estimated from visual indicators and it should only be taken as a
provisional guide. Age estimates often need to be modified based on further information such as
historical records or local knowledge.
•       Distance to Structures: This is estimated to the nearest metre and intended as an
indication rather than a precise measurement.
Frass: A sawdust like after effect from wood and bark chewing/boring insects.
Shot Holing: A local area of absent leaf tissue caused by sap sucking or leaf chewing insects.
Adventitious Roots: Commonly referred to palm tree root systems, a response caused by a
reaction to oxygen.
Tilth- The loosened effect of soil in the hole walls and floor.
Epicormic growth: Stress shoots, water shoots, re-growth or suckers. Poorly attached, quick
growing.
SRZ: Structural Root Zone
TPF: Temporary Protection Fencing
Adventitious shoots: A branch arising from a stem or parent branch having no connection to
apical meristems.

Arborist Brief– TSA: 22 Nylana Way, Doonan
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SRZ: Structural Root Zone
CRZ: Critical Root Zone
Basic VTA: Detailed visual inspection of a tree & surrounding site that may include the use of
simple tools. It requires that a tree risk assessor walk completely around the tree trunk looking at
the site, above ground roots, trunk & branches.

8.   Appendix 2 – Disclaimer

All care has been taken to obtain information from sources which by all means are reliable. All
information and data has been verified as far as possible. However, Treesafe Australia Pty Ltd
cannot guarantee nor be responsible for the accuracy of information provided by others.
Unless stated otherwise:
Information contained in this report covers only the trees that were inspected and reflects the
conditions of the trees at the time of inspection.
Trees are assessed under typical weather conditions and do not account for large weather events
with a rating of Beaufort scale 9 (Strong gale 76-87Km/h. 41-47knots) or greater.
The inspection was limited to the visual examination of the subject tree without drilling, coring,
probing, x-ray imaging, excavation, dissection or any other tool or method unless stated within
this report.
There is no warranty or guarantee, expressed or implied, that any issues, problems faults, failures
or deficiencies of the subject tree(s) may not arise in neither the present nor the future.
Treesafe Australia Pty Ltd reserves the right to forward a copy in full of this report to any local,
state, or federal government body or regulatory authority that may request this report for the
assistance in making an informed assessment of the trees on site.
This report has been prepared for the exclusive use of the client and Treesafe Australia Pty Ltd
accepts no responsibility for its use by other persons or organizations. The client/approved
recipient of this report acknowledges that this report and any options, opinions, advice, or
recommendations expressed or given in this report are based on the information supplied by the
client and on the data inspections, measurements and analysis carried out or obtained by
Treesafe Australia Pty ltd. and referred to in this report. The client/approved recipient should only
rely on this report and on its contents only to that extent.




Brett Hames
Consulting Arborist
Diploma of Horticulture (Arboriculture)
AQF level 5/Certificate No. 51705508QD

Arborist Brief– TSA: 22 Nylana Way, Doonan
Treesafe Australia Pty Ltd. September 2023©                                  Page 7|7