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RFI - Arboricultural Report
ARBORICULTURAL REPORT
32 Viewland Drive Noosa Heads
Commissioned by Alysha Sharrock (Deluca Development & Construction)
Prepared by Brendan Martin
Director/Principal Consulting Arborist
December 5, 2020
PO BOX 304 EUDLO Q 4554
Ph: 7 54 459921 Mobile: 0412 586131 Fax: 7 54 789160
[email protected] www.treesolutions.com.au
Dip.Arb/Hort, MAA, MISA, MQAA
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Page 2
TABLE OF CONTENTS
1. 1. Copyright Page 3
2. Brief Page 4
3. 3. Findings Page 5
4. 4. Images Page 6 - 11
5. 5. Tree Protection Page 12 - 13
6. Disclaimer Page 14
7. Bibliography Page 15
Page 2 of 15
Page 3
1. COPYRIGHT
Produced by: Tree Solutions Australia P/L
Prepared by: Brendan Martin (Dip.Arb/Hort, MAA, MISA, MQAA)
Commercial in Confidence
All the information contained in this document is provided in strict commercial confidence. It
shall not be disclosed to any third party or reproduced in any way without the express written
consent of Tree Solutions Australia.
Copyright
© Tree Solutions Australia P/L
Page 3 of 15
Page 4
2. BRIEF
Terms of Reference
Request by Alysha Sharrock (Deluca Development & Construction) to provide an Arboricultural Report
addressing tree protection measures for proposed development at 32 Viewland Drive, Noosa Heads.
Procedure
A ground site assessment was conducted on November 16, November 30 and December 2, 2020.
2.0 Site Map
Page 4 of 15
Page 5
3. FINDINGS
3.0
Botanical Name Common Name Height TPZ 10% SRZ Comments
1 Callitris glaucophylla White Cypress 20m 7.2m 4.9m 2.7m Protect & retain
4 Callitris glaucophylla White Cypress 19m 6m 4.1m 2.5m Protect & retain
5 Callitris glaucophylla White Cypress 19m 3.6m 2.5m 2m Protect & retain
12 Callitris glaucophylla White Cypress 18m 3.6m 2.5m 2m Remove – Too close to boundary
16 Callitris glaucophylla White Cypress 20m 3.6m 2.5m 2m Protect & retain
17 Callitris glaucophylla White Cypress 18m 4.8m 3.3m 2.3m Protect & retain
20 Callitris glaucophylla White Cypress 18m 3.5m 2.4m 2m Remove – Too close to boundary
26 Callitris glaucophylla White Cypress 19m 8.4m 5.8m 2.8m Protect & retain
27 Callitris glaucophylla White Cypress 20m 7.2m 4.9m 2.7m Protect & retain
33 Callitris glaucophylla White Cypress 18m 6m 4.1m 2.5m Protect & retain
34 Lophostemon confertus Brushbox 18m 3.6m 2.5m 2m Remove
35 Lophostemon confertus Brushbox 18m 7.2m 4.9m 2.7m Basal wounding - Remove
56 Araucaria cunninghamii Hoop Pine 35m 8.4m 5.8m 2.8m Protect & retain
57 Callitris glaucophylla White Cypress 18m 4.8m 3.3m 2.3m Poor Form - Remove
63 Araucaria cunninghamii Hoop Pine 24m 8.4m 5.8m 2.8m Remove
67 Araucaria cunninghamii Hoop Pine 35m 7.2m 4.9m 2.7m Remove
68 Callitris glaucophylla White Cypress 18m NA NA NA Poor Form - Remove
71 Araucaria cunninghamii Hoop Pine 20m 4.8m 3.3m 2.3m Protect & retain
72 Araucaria cunninghamii Hoop Pine 20m 4.8m 3.3m 2.3m Protect & retain
75 Cryptocarya sp. Native Laurel 12m 4.2m 2.9m 2.1m Protect & retain
TPZ: Tree protection zone
10% encroachment of TPZ
SRZ: Structural root zone
3.1 The trees recommended for removal cannot be retained adequately due to TPZ’s being
significantly compromised. Other trees for removal in the event of TPZ’s that can be protected are
far too large to be safely retained. If retained they will be open to constant limb loss possibility
due to exposure as a result of the removal of other adjacent vegetation.
3.2 TPZ’s need to be determined and clearly marked out prior to any tree removals. ATF fencing or
similar should be set out to limit root damage of protected trees.
Tree removals must be undertaken with care and root balls should be stump ground when close
to protected trees. Any works within TPZ’s should be supervised by the Project Arborist.
3.3 Tree 33, 27 and 26 are quite close to designated open space areas so care will be needed during
construction. Tree 56 is well clear of planned site works but is a mature and large tree so will
require total protection of the TPZ.
3.4 All retained trees require mulching of the TPZ’s using good quality forest mulch. Root pruning
using Air spade or a vacuum excavation process is recommended for any works within 1 metre of
TPZ’s.
3.5 Although not plotted there are some smaller trees in the North-East corner that can also be
protected if possible.
Page 5 of 15
Page 6
4. IMAGES
75 71 56
72
57 34
68
67 35 33
63 27
26
1 16
4 5 17
12
20
Page 6 of 15
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4. IMAGES
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NOOSA YOUNGCARE
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Page 6 of 15
Page 7
Tree 67
Tree 72
Page 7 of 15
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3.1. Noosa Youngcare Masterplan
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02 Meow 2020 % See 12008 ee cn Form tandecape Architects Page tt
Page 7 of 15
Page 8
Fig (for
removal)
Tree 63
Tree 34
Tree 35
Page 8 of 15
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Page 8 of 15
Page 9
Tree 33 Tree 27
Tree 26
Page 9 of 15
[OCR of page images]
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/
Page 9 of 15
Page 10
Tree 4
Tree 1
Tree 20
Page 10 of 15
[OCR of page images]
Page 10 of 15
Page 11
Tree 16 & 17
Tree 12
Page 11 of 15
[OCR of page images]
Page 11 of 15
Page 12
5. TREE PROTECTION
TREE PROTECTION – AS4970 -2009 ‘Protection of trees on development sites’
The tree protection zone (TPZ) is the principal method of protecting trees on development sites. It is an
area set aside from disturbance from construction works, enabling sufficient parts of a tree and its
growing environment to be undisturbed, so that the tree will remain stable and viable.
Root protection zone (RPZ)
A specified area below ground and at a given distance from the trunk set aside for the protection of tree
roots to provide for the viability and stability of a tree to be retained where it is potentially subject to
damage by development.
NOTE: Establishment of these areas may include root investigation and mapping, root pruning and
installation of root barriers or other protection measures at the edge of the RPZ to prevent conflict
between roots and works.
Structural root zone (SRZ)
The area around the base of a tree required for the tree’s stability in the ground. The woody root
growth and soil cohesion in this area are necessary to hold the tree upright, so the entire profile (depth)
of the root zone is included in the structural root zone. The SRZ is nominally circular with the trunk at its
centre and is expressed by its radius in metres.
This zone considers a tree’s structural stability only, not the root zone required for a tree’s vigour and
long-term viability, which will usually be a much larger area.
Tree
Long lived woody perennial plant greater than (or usually greater than) 3 m in height with one or
relatively few main stems or trunks.
Tree protection zone (TPZ)
The combined area of the root protection zone (RPZ) and crown protection zone (CPZ) as an area set
aside for the protection of a tree.
DETERMINING THE TREE PROTECTION ZONE
Trees should be physically protected at all stages of development. The tree protection zone (TPZ) is
determined by a combination of the areas of primarily the root protection zone (RPZ) and to a lesser
extent, the crown protection zone (CPZ) considering the proposed construction methods and structures.
These zones are illustrated in Figure 1.
The determination of the tree protection zone should involve—
(a) Identifying an area of ground around the tree that should remain undisturbed (root protection zone)
and ensuring that it is feasible to maintain protective measures undisturbed around all such areas
throughout the construction period (see Clause 1.4.6); and
(b) Identifying an area around the tree crown that should remain undisturbed (crown protection zone)
and ensuring that it is feasible to maintain protective measures undisturbed around all such areas
throughout the construction period (see Clause 1.4.1).
The TPZ is plotted to include the RPZ and CPZ.
A site plan showing TPZs should be prepared.
Page 12 of 15
Page 13
DETERMINING THE ROOT PROTECTION ZONE
The purpose of the RPZ is to protect the area of roots required to maintain the tree’s vigour and stability
during the development process and into the long term. The RPZ is calculated for each tree based on its
age class and vigour class. Each tree may be fenced off to form an enclosure with the tree at the centre,
or an existing structure may be utilized, being retained such as a wall or fence.
Table 2 provides the means for determining RPZ based on the age and vigour of the tree, as assessed by
the project arborist.
The minimum radius of the RPZ is determined by multiplying the DBH, in metres, by the appropriate
multiplier, given in Column 3 of Table 2.
TABLE 2
CALCULATING THE MINIMUM RPZ
(EXCEPT FOR PALMS, CYCADS AND TREE FERNS)
Tree Age Tree Vigour RPZ radius (M)
Young trees (age less than 20% of life Good Vigour 6 x DBH
expectancy in situ)
Poor Vigour 9 x DBH
Mature trees (age between 20% and 80% of Good Vigour 9 x DBH
life expectancy in situ)
Poor Vigour 12 x DBH
Over mature trees (age greater than Good Vigour 12 x DBH
80% of life expectancy in situ)
Poor Vigour 15 x DBH
NOTES:
1. Radial distances are measured from the centre of the stem at ground level.
2. The RPZ distances in this table are based on a good species tolerance to site disturbance. There
are no scientific data of tree tolerances for Australian conditions.
3. No tree should have RPZ less than 2 m or greater than 15 m. The RPZ of palms and other
monocots, cycads and tree ferns must be 1 m outside the dripline edge of the crown.
Page 13 of 15
Page 14
6. DISCLAIMER
This information contained in this report has been prepared on an independent basis, free of any bias and represents
the honest opinion of the consulting arborist. All data is based on visual inspection of the tree/s and its/their location
at the time of writing, unless otherwise stated, and contains opinions, advice and recommendations based on
information and data gathered from site inspections carried out by the author and information supplied by the Client.
All information received from the Client shall be deemed to be true, accurate and up to date.
To the extent permitted by law, you agree Tree Solutions Australia Pty Ltd is not liable to you or any person or entity
for any loss of or damage caused or alleged to have been caused (including loss or damage resulting from negligence)
either directly or indirectly, by your use of the information made available in this report. In no event will the author be
liable to you for any lost revenue or profits, or for special, indirect, consequential or incidental damage (however
caused and regardless of the theory of liability) arising out of or related to your use of that information, even if the
author has been advised of the possibility of such a loss or damage.
This report is subject to copyright laws and no part may be reproduced or used without the written permission of Tree
Solutions Australia Pty Ltd nor will any responsibility be accepted for unauthorised or partial use of this report.
Unless otherwise stated this report cannot be used within a court of law or any legal situation without the prior
consent of Tree Solutions Australia Pty Ltd. The author shall not be required to give testimony or to attend court by
reason of this report unless subsequent contractual arrangements have been made.
The information contained in this report refers only to the trees that were inspected as per request and reflects the
condition of the trees at the time of the inspection. There is no warranty or guarantee, expressed or implied, that the
problems or deficiencies of the plants or property in question may not arise in the future. Likewise, remedial
treatments cannot be guaranteed.
Arboriculturalists cannot detect every condition that could possibly lead to the structural failure of a tree. Trees are
living organisms that fail in ways we do not fully understand. Conditions are often hidden within trees and below
ground.
This report does not take into consideration the possibility of extreme weather or other events over which Tree
Solutions Australia Pty Ltd has no control.
Treatment, pruning and removal of trees may involve considerations beyond the scope of the Arboriculturalists
services, such as property boundaries and ownership, disputes between neighbours, sight lines, landlord-tenant
matters and other related issues. Such issues cannot be taken into account unless complete and accurate information
is given nor can any responsibility be accepted for the authorization or non-authorization of any recommended
treatment or remedial measure.
Arboriculturalists are tree specialists who use their education, knowledge, training and experience to examine trees,
recommend measures to enhance the beauty and health of trees and attempt to reduce the risk of living near trees.
Safety, the trees survival requirements and wildlife habitat needs are criteria considered. Trees can be managed, but
they cannot be controlled. To live or work near a tree involves some degree of risk. The only way to eliminate all risks
associated with a tree is to eliminate the tree.
Page 14 of 15
Page 15
7. BIBLIOGRAPHY
VTA (Visual Tree Assessment – Prof. Dr. Claus Mattheck 1994) based on
‘The Body Language of Trees’.
An Evaluation of Hazard Trees (ISA – Matheny & Clark 1994).
Dictionary for Managing Trees in Urban Environments – Danny B Draper and
Peter A Richards
Modern Arboriculture and a New Tree Biology by Dr Alex Shigo.
Arboriculture ‘Integrated Management of Landscape trees, shrubs and vines –
Richard W. Harris
AS 4373 – 2007 (Australian Standards – Pruning Of Amenity Trees)
AS 4970 – 2009 (Australian Standards – Protection of Trees on Development
Sites)
Page 15 of 15