Post on 13-Apr-2018
HIGH STREET (LAND TO SOUTH OF)
GREAT WAKERING
ARBORICULTURAL IMPACT
ASSESSMENT &
METHOD STATEMENT
Written by: M Welby
Checked by: J Seymour Date: 29/06/2016
Ref: TWEL20425aia-ams Revision:
High Street (land to south of), Great Wakering Arboricultural Impact Assessment and Method Statement
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Table of Contents
1.0 Executive Summary ................................................................................................... 3
2.0 Introduction ................................................................................................................ 4
3.0 Arboricultural Impact Assessment ............................................................................. 6
3.1. Overview of proposed development ...................................................................... 63.2. Tree Preservation Orders ...................................................................................... 63.3. Previous planning applications and consents ....................................................... 63.4. Trees proposed for removal & surgery .................................................................. 63.5. Demolition, site clearance & archaeology ............................................................. 63.6. Construction within RPAs ...................................................................................... 73.7. Permanent hard surfaces within RPAs ................................................................. 73.8. Protection fencing ................................................................................................. 73.9. Shade and future pressure to prune ..................................................................... 73.10. Services .............................................................................................................. 7
4.0 Arboricultural Method Statement ............................................................................... 8
4.1. Construction exclusions zone ............................................................................... 84.2. Tree protection barriers ......................................................................................... 94.3. Ground protection ............................................................................................... 134.4. Site storage, parking, welfare facilities, etc ......................................................... 154.5. Tree surgery and removal ................................................................................... 164.6. Soft landscaping .................................................................................................. 174.7. Installation of underground services ................................................................... 184.8. Installation of no-dig surface ............................................................................... 204.9. Installation of boundary fencing within protected areas ...................................... 23
Appendix: Tree Protection Plan ........................................................................................ 24
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1.0 Executive Summary
1.1. ACD was initially instructed, to carry out a tree survey, and present constraints details
in accordance with BS5837:2012 Trees in relation to design, demolition and
construction. This was to identify the quality and value of existing trees on site,
allowing decisions to be made as to the retention or removal of trees during
development. Subsequently, the subject layout has been produced and is in line with
recommendations of the British Standard. Adequate protection can be provided to
ensure all retained trees are protected throughout development.
1.2. A number of residential dwellings are proposed on this site, the layout of which can
be seen on the appended plan.
1.3. Some site supervision will be required during the installation of the no-dig emergency
access near to retained trees.
1.4. The relationship between the building and retained trees is sustainable and is not
likely to result in any pressure to prune requests from future occupants.
1.5. The arboricultural method statement and tree protection plan include details of all tree
protection measures required.
1.6. The tree protection must be erected after tree removals and surgery but before any
demolition or construction contractor enter the site, and before any soil stripping takes
place.
1.7. There will be no changes in levels, service routing, machine activity, storage of
materials or site hut positioning within areas to be protected, and the protective
fencing shall remain in position for the duration of the construction process.
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2.0 Introduction
2.1. Taylor Wimpey instructed ACD Environmental in June 2016 to prepare the following
impact assessment.
2.2. Following the recommendations of the British Standard1, this report includes the
necessary information to support a planning application. It demonstrates that the
impact, both direct and indirect, of the proposed development within the site, has
been assessed and where appropriate, mitigation and tree protection proposed.
2.3. The implementation of the protection methods recommended within this report are
critical for ensuring the retained trees are successfully protected through the
construction process and must be implemented prior to any work on site.
2.4. This assessment is based upon the supplied layout drawing.
2.5. This assessment considers the impact of the development on the constraints posed
by the retained trees (both beneath ground: the root protection area (RPA), and above
ground: the canopy).
2.6. Direct impact from development comes in six main forms: 1) Surface installation
within RPAs, 2) Root loss from excavation for foundations, drainage and other utilities
within RPAs, 3) Soil stripping, removal and level changes within RPAs, 4) Excessive
access facilitation pruning to retained trees, 5) Soil compaction from storage and
vehicle movements within RPAs, 6) Soil contamination.
2.7. Indirect impact can come from changes to the site hydrology, future pressure to prune
or fell, failure of trees exposed by removal of neighbouring trees, and other
environmental changes which can take several years to manifest.
2.8. The RPA for each tree represents a minimum area in m² that should be left
undisturbed around each retained tree. This is initially represented by a circle but is
often adjusted to account for constraints to root growth within the site (primarily
highways and buildings). It is therefore important to ensure the protection of trees
1 BS5837:2012 Trees in relation to design, demolition and construction- Recommendations, London: British Standards Institute
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both above and below ground. Recommendations are provided in the British
Standard as to the protection of existing trees before, during and after development.
This is achieved by ensuring the tree protection plan and arboricultural method
statement are implemented before any commencement on site.
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3.0 Arboricultural Impact Assessment
3.1. Overview of proposed development
3.1.1. A number of residential dwellings are proposed on this site, the layout of
which can be seen on the appended plan.
3.2. Tree Preservation Orders
3.2.1. There are no Tree Preservation Orders (TPOs) present on any trees on, or
adjacent to the site, nor is the site within a Conservation Area.
3.3. Previous planning applications and consents
3.3.1. There are no relevant past applications or extant planning consents for this
site.
3.4. Trees proposed for removal & surgery
3.4.1. The only trees to be removed to facilitate construction will be a few edge
trees of the group marked G12. These are low value category C willow trees. Their
removal will not result in significant detriment to the character of the area and is
therefore acceptable.
3.5. Demolition, site clearance & archaeology
3.5.1. To ensure damage does not occur to trees highlighted for retention, tree
protection fencing must be erected before ANY plant/vehicles entering site
whatsoever. This should be subject to a pre-commencement site meeting between
the developer, their project arboriculturist and a representative from the Local
Authority.
3.5.2. No special demolition procedures need be observed on this site, other than
respecting the tree protection fencing.
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3.6. Construction within RPAs
3.6.1. The construction of all buildings is proposed outside the RPAs of retained
trees.
3.7. Permanent hard surfaces within RPAs
3.7.1. In section 7.4 of the British Standard, permanent hard surfacing within the
RPAs of retained trees is addressed, and recommendations made.
3.7.2. In the case of T1, the weeping willow tree, the proposed emergency access
passes through its RPA. To avoid root damage, various design criteria must be met,
ensuring that a no-dig approach is taken, limiting the impact on the trees. Any design
must be approved for use by the project arboriculturist.
3.8. Protection fencing
3.8.1. Figure 2 of the British Standard recommends a standard fencing design for
tree protection. This is a weld mesh panel design, mounted upon a well-braced
scaffold framework. This is perfectly adequate for this site and all the retained trees
can be suitably protected by its erection before any works start on site whatsoever.
3.9. Shade and future pressure to prune
3.9.1. ACD have worked with the design team from the start of this project and we
feel that the resulting proposed layout is both sustainable and results in
juxtapositions between trees and buildings which will not bring future requests for
excessive pruning and/or tree removal.
3.10. Services
3.10.1. Full details of the service and utility provisions for the site remain to be
finalised. However, there is adequate space for utility trenches to access the site
whilst avoiding RPAs and exclusion zones.
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4.0 Arboricultural Method Statement TO BE READ IN CONJUNCTION WITH THE APPENDED TREE
PROTECTION PLAN REF: TWEL20425-03
4.1. Construction exclusions zone
4.1.1. Barriers and/or ground protection must be used to protect all retained trees
before any machinery or materials are brought onto the site, and before any
demolition, development or stripping of soil commences.
4.1.2. Where all activity can be excluded from the RPA, vertical barriers must be
erected to create the construction exclusion zone (CEZ). The default position of
which is shown on the appended Tree Protection Plan.
4.1.3. Where, due to site constraints, construction activity cannot be fully or
permanently excluded from all, or part of a tree’s RPA, appropriate ground protection
can be installed.
4.1.4. It is the responsibility of everyone engaged in the construction process to
respect the tree protection measures and observe the necessary precautions within
and adjacent to them.
4.1.5. Inside the exclusion zone, the following shall apply:
• No mechanical excavation whatsoever.
• No excavation by any other means without arboricultural site
supervision.
• No hand digging without a written method statement having first been
approved by the project arboriculturist.
• No lowering of levels for any purpose (except removal of grass sward
using hand tools).
• No storage of plant or materials.
• No storage or handling of any chemical including cement washings.
• No vehicular access.
• No fire lighting.
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4.1.6. In addition to the above, further precautions are necessary adjacent to trees:
• No substances injurious to tree health, including fuels, oil, bitumen,
cement (including cement washings), builders sand, concrete mixing
and other chemicals shall be stored or used within or directly adjacent
to the protection area of retained trees.
• No fire shall be lit such that flames come within 5m of tree foliage.
4.2. Tree protection barriers
4.2.1. The construction exclusion zone will be protected as per the appended tree
protection plan that shows the default alignment of the tree protection barriers, to be
installed prior to any of the following taking place:
• Archaeology
• Demolition
• Plant and material delivery
• Soil stripping
• Utility installation
• Construction works
• Landscaping
4.2.2. Stages for installation of barriers:
1) Hand clearance of any vegetation to allow clear working access.
2) Setting out of node points
3) Barriers erected
4) Site meeting with project arboriculturist to ‘sign-off’ tree protection
fencing.
5) Site accessible to demolition/construction traffic
4.2.3. Once erected, all barriers will be regarded as sacrosanct, and will not be
removed or altered without prior recommendation by the project arboriculturist and
approval of the local planning authority.
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4.2.4. The default barrier construction is suitable for areas of high intensity
development, and shall comprise of interlocking weld-mesh panels, well braced to
resist impacts by attachment to a scaffold framework that is set firmly into the ground.
A detailed specification can be found on the TPP.
4.2.5. The images below are alternative barrier designs that have been successfully
used on site and that ACD are happy to support if a variation from the default style
is required. If such a variation is necessary, the approval of the project arboriculturist
will be obtained prior to any implementation on site.
4.2.6. Once barriers and/or ground protection have protected the exclusion zone,
construction work can commence.
4.2.7. All weather notices should be erected on the barriers (for example see figure
below).
Tree protection sign (download from http://www.acdenvironmental.co.uk)
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Weld-mesh panels on scaffold uprights
Weld-mesh panels on wooden posts
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Chain-link on angle-iron uprights
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4.3. Ground protection
4.3.1. If required, ground protection is to be installed as follows. It must be capable
of supporting the expected loads and avoiding rutting, compaction and damage to
the soil: as advised in section 6.2.3 of the British Standard.
4.3.2. Stages for ground protection installation:
1) No plant machinery to be used in the area of ground protection for
whatever reason
2) Dismantle primary TPF and re-erect in secondary location as shown
on TPP (if required) OR erect fencing to protect any newly exposed
CEZ not to be covered by ground protection.
3) Any shrubs, saplings or trees to be removed, are to be cut, or ground
out to just below ground level rather than grubbed or winched out,
which can damage roots of retained trees.
4) Lay woven geotextile over existing ground surface by hand
5) Cover the area with compressible layer, woodchip for example, using
hand tools only
6) Cover compressible layer with side butting scaffold boards or plywood
boards
7) Confirm surface is acceptable for use with project arboriculturist
8) Area ready for construction access
4.3.3. Any scaffolding required within the area will be erected with the uprights
placed on spreader boards.
4.3.4. The boarding will be left in place until the construction works are finished.
4.3.5. A single thickness of boarding laid on the soil surface will provide sufficient
protection for pedestrian loads. However, for wheeled or tracked construction traffic
movements within the RPA, ground protection will involve the use of temporary
cellular confinement systems, reinforced concrete slabs or track-board systems
details of which are to be specified by the project engineer and approved for use by
the project arboriculturist and local authority before construction commences.
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4.3.6. Track-boards can be sourced from Trakmats Europe Ltd, 0845 6435388,
www. trakmatseurope.com, or groundguards.com
4.3.7. There is to be no-excavation within ground protection area whatsoever. This
includes installation of services and associated utilities.
Scaffold board pedestrian ground protection
Vehicular ground protection trackway
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4.4. Site storage, parking, welfare facilities, etc.
4.4.1. The site will require provision for; site storage, contractor parking, welfare
facilities, temporary services/drainage, material drop off points, etc.
4.4.2. It is acceptable to place site cabins and walkways within the CEZ provided
they are installed sensitively:
• Cabins must be placed on sleepers (or similar) to spread the load,
avoiding point loading and associated soil compaction.
• The delivery of cabins should ensure that any unloading via ‘hi-ab’
crane can be carried out without impact on the crowns of retained
trees.
• Walkways, if required, should be installed as per the ground
protection specification.
• Any utilities for site compounds must be run above ground. For
example, WC foul pipes/drainage and temporary electrical
connections.
4.4.3. It is imperative that if cabins and walkways are installed, that fencing is
erected to limit access to the protected areas. If amendments are made, the project
arboriculturist should sign off the proposals prior to their implementation.
4.4.4. Contractor parking and storage areas should be sited outside the CEZ.
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4.5. Tree surgery and removal
4.5.1. All trees to be removed are indicated on the TPP.
4.5.2. If any surgery work is proposed, details will be submitted to, and approved
by, the council, before being carried out.
4.5.3. All work will be carried out in accordance with BS39982 industry best practice
and in line with any works already agreed with the council.
4.5.4. The tree surgeon shall ideally be chosen from The Arboricultural
Association's Approved Contractor list. All work shall be undertaken at the
appropriate time and with the consent and approval of the site agent.
4.5.5. The statutory protection3 4 will be adhered to. If further advice is required,
particularly if bats are discovered during tree work, it will be obtained from Natural
England or other competent persons and recommendations adhered to.
4.5.6. The stumps of any trees removed from within the Construction Exclusion
Zone or the RPAs of retained trees will be either cut flush to ground level and left in
situ or ground out using a stump grinder. They will not be winched out.
4.5.7. All operations shall be carefully carried out to avoid damage to the trees being
treated or neighbouring trees. No trees to be retained shall be used for anchorage
or winching purposes.
2 BS3998:2010- Recommendations for Tree Work. London: British Standards Institute 3 Wildlife and Countryside Act. (1981) London: HMSO. 4 Countryside and Rights of Way Act. (2000) London: HMSO.
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4.6. Soft landscaping
4.6.1. All landscaping and associated ground preparation within exclusion zones
will be carried out sensitively to ensure root damage is minimised as much as is
practicable.
4.6.2. At no time is any heavy plant to be used within any protected area.
4.6.3. Removal of existing vegetation (including turf) will be carried out with hand
tools only.
4.6.4. Should the soil be compacted or have a poor structure that may hinder the
development of any new planting, soil decompaction techniques may be used upon
consultation with the project arboriculturist.
4.6.5. Tree protection barriers may be removed to allow access and then replaced
as required/per approved documents (in liaison with the arboricultural clerk of works)
4.6.6. Levels (high spots) will not be reduced or excavated in any way. Use good
quality top-soil to level any low-lying areas and hollows, and provide a fine tilth to lay
turf on. This imported soil must not result in a level increase of more than 100mm in
any area.
4.6.7. Import materials by hand in wheelbarrow or using a digger sited outside the
sensitive area.
4.6.8. Any excavation for planting pits must be dug using hand tools only.
4.6.9. No works will be carried out within any protected areas if the soil moisture is
of a level likely to allow compaction to occur.
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4.7. Installation of underground services
4.7.1. Mechanical trenching for the installation of underground apparatus and
drainage severs any roots present and can change the local soil hydrology in a way
that adversely affects the health of the tree. For this reason, particular care should
be taken in the routing and methods of installation of all underground apparatus.
Wherever possible, apparatus should be routed outside RPAs. Where this is not
possible, it is preferable to keep apparatus together in common ducts. Inspection
chambers should be sited outside the RPA.
4.7.2. Where underground apparatus is to pass within the RPA, detailed plans
showing the proposed routeing should be drawn up in conjunction with the project
arboriculturist. In such cases, trenchless insertion methods should be used:
Microtunnelling, Surface-launched directional drilling, Pipe ramming or Impact
moling (see BS5837:2012 Table 3), with entry and retrieval pits being sited outside
the RPA. Provided that roots can be retained and protected, excavation using hand-
held tools might be acceptable for shallow service runs. If this is case, the following
methodology must be followed:
4.7.3. Stages for installing services by hand within tree protection areas:
No plant machinery to be used in the area for whatever reason
1) Contact project arboriculturist to hold pre-start site meeting and
‘toolbox’ talk before starting work.
2) Remove just enough tree protection fencing to allow access to area
and facilitate trenching.
3) Remove any surface vegetation or existing hard surfaces using hand
tools.
4) Using and air-pick excavate the trench, keeping to minimum
dimensions required.
5) Roots occurring in clumps of 25 mm diameter and over are
encountered they will be retained, and kept damp by covering with
hessian (re-wetted as required). If required, these should be severed
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only following consultation with an arboriculturist; as such roots might
be essential to the tree’s health and stability.
6) Feed in services.
7) Back fill trench with 200-300mm depth of excavated soil, or a mixture
of excavated and imported top-soil to BS3882 (BSI, 2007), firming
down with heels.
8) Repeat step 7 until trench is filled.
9) Re-erect tree protection fencing as per approved plan.
4.7.4. The method of excavation above, for trenching within RPAs, is using air
excavation. This tool utilises compressed air to remove soil from around tree roots
causing minimal damage and can be run off a typical site compressor. ACD can
provide details of contractors supplying air excavation services if required.
4.7.5. Alternatively, trenchless technology, such as thrust boring can be used in
some instances and is particularly effective as it can pass directly under the tree, at
a depth which is likely to avoid almost all impact on roots of the subject tree. As no
access/thrust pits will be located within the RPAs of the subject trees, the need for
arboricultural supervision is limited.
4.7.6. Reference can be made to NJUG Vol 45 for guidance, but any approach must
be approved by the project arboriculturist and brought to the attention of the local
authority tree officer.
5 National Joint Utilities Group. (2010). Volume 4: NJUG Guidelines For The Planning, Installation And Maintenance Of Utility Apparatus In Proximity To Trees (Issue 2) – Operatives Handbook. NJUG.
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4.8. Installation of no-dig surface
4.8.1. To ensure that tree roots, within the ground under this proposed surface,
continue to survive during and after construction a cellular system such a CellWeb6
of 75-200mm depth is to be used.
No-dig cross-section
4.8.2. Stages for Installation of the cellular confinement surface:
1) Contact project arboriculturist to hold pre-start site meeting and
‘toolbox’ talk before starting work
2) Dismantle TPF and re-erect in secondary location as shown on TPP
3) Remove existing vegetation by using a specific herbicide (as advised
by a specialist) or manual removal with hand tools only. Agreed
removal of shrubs, saplings or trees, within the protected areas of
retained trees are to be cut, or ground out to just below ground level
rather than grubbed or winched out, which can damage roots of
retained trees.
4) Retain all original ground levels after vegetation removal. No
excavation whatsoever.
6 Geosynthetics Ltd, 01455 617139, www,geosyn.co.uk
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5) Remove any existing hard surfaces (paving, tarmac etc.) Hand tools
should be used if possible. If machinery is required for this operation,
it must be used only on existing surfaces or outside the protection
areas and tree canopies (approval from project arboriculturist must be
sought before using machinery). The sub base of existing surfaces or
foundations should be left in situ where possible to avoid
unnecessary root disturbance and provide a base for the new
surface.
6) Install a non-woven Geotextile (such as TreeTex T300) directly over
soil grade level (levelled where necessary, by non-compacted
washed sand) and fix in place.
7) Lay the cellular system over the Geotextile, which is secured open
under tension during the infill process with steel staples or wooden
pegs.
8) Install kerbs and edgings directly on top of existing soil grade level.
For light structures, a treated peg and board may be acceptable. For
more substantial structures, railway sleepers, haunched concrete with
road pins, drilled kerbstones, gabions or cast in situ kerbs will be
appropriate.
9) Fill the cellular system ensuring any machinery works only on already
filled areas. Typical infill consists of no fines angular granular material
20-40mm, which will remain un-compacted.
10) Cover with a non-woven Geotextile (such as TreeTex T300).
11) Install porous wearing surface.
4.8.3. Any variation to the above specification must meet the following design
criteria for low-invasive surfaces to provide the conditions for continued tree survival
and growth:
• Maintain oxygen diffusion through new surface to rooting area (5-12%
by volume7)
7 Smith, R. J. (2006). Tree Roots in the Built Environment. HSO
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• Maintain sufficient passage of water to the rooting area (12-40% by
volume8)
• Avoid compaction by maintaining a soil structure sufficient to sustain
root growth (soil bulk density below 1.4g/cc9).
4.8.4. Site analysis of the soil type and its structural characteristics will be required
prior to determining the specific depth of products to be adopted for example,
footpaths normally require a depth of 75mm and, 100mm to 200mm depths are used
for residential driveways, while greater depths may be required for the passage of
heavier traffic such as for construction access and delivery vehicles.
4.8.5. If ground levels are to be raised more than 150mm this should be achieved
by the use of a granular material, which does not inhibit vertical gaseous diffusion.
For example: no-fines gravel, washed aggregate, structural soil (min. 20% sand
content) or cobbles.
8 Coder, D. K. (2000). Tree Root Growth Requirements. University of Georgia 9 Harris, C. M. (2004). Arboriculture, Tree Management of Shade Trees and Vines.
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4.9. Installation of boundary fencing within protected areas
4.9.1. Stages for installing wooden fence posts:
No plant machinery to be used in the area for whatever reason
1) Contact project arboriculturist to hold pre-start site meeting and
‘toolbox’ talk before starting work.
2) Remove TPF to allow access to area.
3) Dig postholes using hand tools, avoiding damage to the protective
bark covering larger roots. Roots smaller than 25mm diameter may
be pruned back using either secateurs or a hand saw, leaving a clean
cut.
4) Damage or severance of roots above 25mm diameter must be
avoided. If roots of this size are discovered, the hole should be
relocated. If there are a large number of such roots it may be
necessary to relocate the hole by half a fence panels length and
adjust the fence panels accordingly.
5) Line hole with non-porous lining, for example durable polythene bag.
6) Insert post and fill post-hole with concrete to just below ground level.
7) Trim polythene to ground level and fill with clean topsoil.
Mark Welby Tech Cert (ArborA), Dip Arb (RFS), FArborA Director & Principal Arboriculturist 29 June 2016
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2b
3b 3b4b
5b
4b4b
3b
3b
4b
4b
3b3b
4b
3b
3b
3b
4b
4b
4b
2b
4b
4b
4b
4b
4b
2b
3b
4b
4b4b
4b
5b
5b
3b
3b
4b
4b
4b
3b
2b
2b
3b
3b
1
2
3
4
5
6
7
8
9
10
11
12
131415161 718192021
222324252627282930313233
34
35
36
37
38
39
40 4142 43 44 45 46 47
48
49 5051 52 53 54 55
56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 7273 74 75 76 77 78 79 80 81
8283 84 85 86 87
88
89
9091
92
93
94
95
96
97
98
99 100
101
102
103104
105106
107
108
115
114 113
112
111
110
109118
117
116
127
126
125
124
123
122
121
120
119
128
129
130
131
132
133134
135
136
137
138
139
140
141
142
143144
145
146
147
148
149
150
151
152
153154155
156
157
158
159
160
161162
163
171
170 169
168 167
166
165
164
180179178177176175
174
173
172
10.28
10.3910.35
10.62 10.64
10.43
10.35
10.64
SITP/LP
TP TC
CL 10.39IC
TC10.19GG
10.47
10.50
10.63
10.38
10.49
10.33
10.45
10.31
TC
10.3810.40
10.4510.47
10.49
18.81RL
18.74RL
10.54
10.64
10.36
10.47
11.1911.29 11.11
11.22
11.18
11.26
11.1711.17
11.10
11.1111.14
11.21
11.16
11.08
11.00
10.97
10.95
10.96
11.03
11.03
10.99
10.98
11.08
11.10
11.24
11.16
11.06
11.11
11.09
11.12
11.09
11.0611.08
11.10
11.03
11.0711.10
11.10
10.97
10.90
10.88
10.97
11.01
11.0411.03
11.02
10.98
10.94
10.95
11.10
11.04
11.07
11.09
11.10
11.14
11.10
11.04
11.07
11.01
11.03
11.07
11.05
11.12
11.16
11.21
11.14
11.07
11.06
11.1011.01
10.87
10.94
11.07
11.27
11.19
11.13
11.11
11.07
11.06
11.03
11.03
11.03
11.05
11.0911.04
11.04
11.08
11.12
11.15
11.20
11.13
11.17
11.11
10.88
10.85
10.91
10.91
10.96
11.04
10.97
10.93
10.96
11.03
ST53
11.8311.90
11.8911.92 11.85
11.91
TP11.02
10.92
10.75
10.7710.75
10.66
11.08
10.65
10.99
10.94
11.04
10.95
10.93
9.38
9.71
9.69
9.549.59
9.80
9.56
9.35
9.19
9.12
9.02
8.94
8.93
9.05
9.18
9.08
9.25
9.39 9.23
9.24
9.35
9.87
9.41
11.66
11.73
12.14
12.09
12.20
12.189.57 9.81
9.74
9.54
9.138.42
7.90 7.76 7.66
7.57
T6
7.43
9.59
9.06
8.908.999.16
9.19
9.36
9.31
10.28
10.35
10.37
10.57
11.39
11.49
11.3111.51
11.51
11.35
11.22
9.31 9.239.21
8.938.77 8.27
8.39
7.50
8.89
8.49
9.379.50
9.229.25
9.51
8.77
8.658.738.80
8.718.73
8.70
12.42
14.41RL
14.38RL
8.67
8.698.87
8.869.12
9.219.60
9.659.56IL 9.11
10.48
10.92
11.00
12.10
12.23
12.08
12.23
12.29
12.03 12.23
10.9310.94
11.14
11.20
11.42
12.26
12.26
12.38
12.22
19.90RL
15.64RL
15.69RL
14.58
14.58
11.86
Ridge Line
Ridge Line
Ridge LineR
idge Line
Ridge Line
Ridge Line
10.70
10.50
10.47
10.65
10.75
10.71
10.65
10.66SCs
10.28
10.96
10.90
10.88
10.99
UTL - No leverage
8.62
8.61
8.56
8.58
8.47
8.51
8.47
8.39
8.33
8.35
8.36
8.33
8.31
8.31
8.308.29
8.27
8.39
8.42
8.47
8.48
8.45
8.57
8.63
8.60
8.55
8.60
8.66
8.78
8.90
8.91
8.74
8.60
8.62
8.57
8.48
8.47
8.47
8.35
8.57
8.58
8.52
8.37
8.52
8.20
8.248.27
8.438.538.54
8.658.708.71
8.73
8.77
8.86
8.90
8.98
8.99
8.95
9.01 8.90
8.808.75
8.69
8.688.66 8.65
8.58 8.498.41
8.308.22 8.32
8.32
8.388.358.318.388.408.47
8.56
8.638.66
8.71
8.78
8.878.92
9.05
9.03
9.36 8.938.84
8.798.79
8.678.64
8.60
8.53 8.40 8.34 8.24 8.238.27
8.70
8.41
8.27
8.28
8.28
8.27
8.28
8.29
8.27
8.26
8.34
8.42
8.46
8.48
8.41
8.46
8.52
8.63
8.61
8.74
8.63
8.52
8.37
8.29
8.27
8.18
8.13
8.12
8.10
8.13
8.11
8.10
8.11
8.04
8.20
8.14
8.17
8.16
8.12
8.12
8.16
8.17
8.11
8.11
8.10 8.11
8.05
8.08
8.08
8.08
8.11
8.13
8.14
8.23
8.31
8.34
8.37
8.40
8.48
8.47
8.53
8.63
8.57
8.63
8.52
8.59
8.49
8.39
8.37
8.29
8.24
8.23
8.21
8.15
8.07
8.06
8.07
8.06
8.02
7.99
8.00
7.96
7.96
7.95 7.927.96
7.78
7.89
7.99
8.06
8.07
8.11
8.04
8.05
8.03
8.03
8.02
8.07
8.14
8.19
8.19
8.25
8.33
8.62
8.53
8.38
8.12
7.60
8.16
8.207.48
8.09
8.15
8.25
7.97
7.61
8.247.94
7.47
8.127.86
7.34
8.10
7.83
8.07 7.79
7.39
8.13
8.05 7.93 7.23
8.07 7.92
7.30
8.127.86 7.
36
8.11 7.91
7.35
8.007.91
7.26
8.03 7.92 7.23
8.04
7.95
8.02
7.78
7.29
7.83 7.72 7.28 7.94
7.95
7.31
7.938.07
8.08 8.05
7.92
7.93
8.09
8.13
8.15
8.218.05
8.318.12
8.408.04
8.428.13
8.05 8.40
8.32
8.31
8.28
8.33
8.35
8.37
8.26
8.32
8.32
8.12
8.16
8.19
8.22
8.21
8.21
8.23
8.28
8.31
8.27
8.18
8.10
8.00
7.95
7.87
8.05
7.99
8.00
8.11
8.228.14
8.08
8.08
8.11
8.08
8.14
8.22
8.25
8.27
8.31
8.35
8.36
8.35
8.34
8.27
8.20
8.13
8.07
8.288.22 8.33 8.39
8.56
8.20
8.27
8.31
8.25
8.20
8.16
8.15
8.16
8.08
8.01
8.01
8.03
8.06
8.15
8.24 8.08
8.16
8.06
8.02
8.07
8.07
8.00
8.10
8.04
8.00
7.92
8.00
8.10
8.14
8.22
8.23
8.22
8.26
8.33
8.31
8.40
8.42
8.40
8.50
8.327.297.44
7.08BL
6.87BL
7.28
8.45
8.52
8.12
8.32
8.29
8.24
8.29
8.27
8.36
8.30
8.14
7.97
8.01
8.09
8.15
8.20
8.12
8.09
8.05
7.88
7.83
7.89
7.88
7.90
8.02
7.96
7.83
7.86
7.83
7.70
7.72
7.77
7.75
7.717.60
7.74
7.83
7.99
8.06 7.89
7.82
7.96
7.82
7.66
7.677.57
7.637.77
7.90 7.81
8.22 8.08
8.45
8.35
8.31
8.41
8.31
8.36
8.26
8.01
7.91
8.01
8.10
8.22
8.25
8.29
8.278.128.048.08
8.08
7.40
8.13
8.288.31
8.44
8.44
8.54
8.56
8.45
8.39
8.77
8.588.57
7.35
7.44
6.96BL
7.24
8.44
8.45
8.95
8.89
8.91
9.15
9.11
9.25
9.18
9.389.19 9.16
8.99
9.219.14
9.24
9.65
9.69
9.76 9.38
9.60
9.58
9.579.50
9.57
9.23
10.51
10.87
8.88 8.52
8.90
8.94
8.91
9.07
9.16
9.26
9.17
9.13
8.77
9.38
9.10
9.12
8.94
8.91
8.87
8.87
8.86
8.81
8.818.85
8.97
9.14
9.25
9.33
9.29
9.15
9.35
9.31
9.17
9.13
9.13
9.28
9.34
9.37
9.39
9.31
9.19
9.10
8.96
9.17
9.37
8.87
9.21
9.30
9.54
9.06
9.31
9.46
9.14
9.71
9.51
ST42
ST43
ST41
RM01
RM02
RM03
RM04
RM05
RM06
RM07
RM08
RM09
RM10
RM11
ST45
8.26
8.38
8.28GG
8.18GG
8.10
8.10
TP
8.308.32
8.328.36
8.38
8.35
8.348.32
8.21
8.278.23
8.278.27
8.288.27
8.36
8.448.46
8.36
8.29
8.30
8.33
8.348.33
8.368.338.40
8.37
8.458.41
8.438.44
8.52
8.33GG
8.29GG
TP
8.33
8.45
8.35
8.47
8.32
8.35
8.32
8.42
8.38
8.25
8.33
8.31
8.42
8.33
8.35
8.40
8.52
8.47
8.57
8.58 8.578.51
8.47
8.59 8.58
8.47
8.438.43
8.39 8.308.31
8.30 8.30
8.348.34 8.37
8.41 8.418.44 8.44
8.488.44
8.412 GVs
CL 8.43MH
SV
8.408.42
SC8.458.428.47
8.44
TC
8.33GG
8.31GG
SI 8.46
8.39
LP8.33
8.23GG
GVTC
SC8.78 8.82 8.80
SCs8.69 8.65 8.65 8.64
8.54 8.56 8.528.55
CL 8.45MH
8.30
8.388.39
8.418.41
8.42
8.44
8.43
8.41
8.428.42
8.41
8.38
8.45
8.468.46
8.458.45
8.448.46
8.478.508.51 8.49
8.45
8.45
8.45
8.46
8.43
8.41
8.39
8.34
13.23
13.21
13.39
14.2914.70
18.64RL
16.14RL
15.54RL
15.24RL
15.56RL
TP
TP
8.72
8.71
TC
8.32
8.46GG8.47
8.488.60
8.51
8.578.62
8.678.63
8.778.77
8.72 8.66
8.628.61
8.57
8.64
8.57
8.588.57
8.598.64
8.73
8.54
LP8.558.57
8.60
8.568.568.59
TP
TC
CL 8.64IC
SC
8.698.68
8.678.68
8.64
8.65
8.708.72
8.70
8.77
8.80
8.83 8.88
8.77
8.71
8.648.668.628.588.63
8.648.64
8.74
8.42GG
8.428.45
8.53
8.65
8.55
8.57
8.61
8.73
8.648.76
8.69
8.81
8.88 8.74 8.74 8.83 8.76 8.718.64
8.83
8.68
8.97
8.68 8.71
8.93
8.97
8.70 8.65 8.61 8.62
8.86
8.608.60 8.58
8.56
8.728.818.92 8.90
LP
9.038.96
8.918.80
8.999.05
8.988.958.97
9.22
8.928.90
8.988.978.968.978.88
8.86 8.87 8.888.88 8.82
8.77
8.518.538.568.578.578.588.608.608.628.638.658.668.688.698.708.708.738.748.76
8.798.808.788.79
8.798.808.76
8.78
LP
TCFH
3 SVs
BB
BX
8.788.88
8.989.00
8.918.81
8.94 8.92 8.90
8.91
8.938.96
8.88 8.78
8.77 8.77 8.85
8.938.94
9.019.049.05
8.68
8.72
8.75
8.81
8.818.808.89
8.92
8.78GG
EC
8.42
16.75RL
16.85RL
16.64RL
17.43RL 17.10
RL 17.16RL
14.66 14.55
14.6914.6114.5914.77
14.4914.41
14.35
8.83
8.84
8.86
8.87
8.85
8.88
8.94
9.06
8.95
9.079.03
8.98
9.04
9.02
8.99
8.94
9.009.01
8.958.96
9.049.03
9.019.06
9.12
9.06
9.16
9.14
9.21
9.09GG
8.94GG
8.93 8.938.88 8.86
GG
8.84 8.86 8.838.85 8.83 8.83
8.80 8.78 8.768.76 8.72
8.74 8.728.67
8.69 8.66 8.64
8.758.768.77
8.788.78
8.798.81
8.828.82
8.848.84
8.878.878.88
8.778.74 8.71
8.748.71
8.71 8.708.65
8.668.64 8.64
CL 8.78MH
8.72
8.748.77
8.828.838.86
8.968.87
8.888.89
9.008.86GG
8.91
9.028.93
8.94
8.92GG CL 9.01
MH
8.96
9.088.97
9.099.00
9.139.06
9.109.129.26
LP
LP
8.828.768.748.818.938.818.868.968.988.918.919.009.03
9.018.928.959.029.038.94
9.059.069.079.018.989.029.12
9.179.189.099.109.099.09
9.169.199.199.259.269.26
8.99
8.94
BB
8.768.87
8.928.87
8.78
8.818.808.838.878.85
8.878.84
8.958.95 8.94
8.94 8.938.93 8.92
8.91
TP
8.968.978.988.999.019.029.039.039.049.059.069.079.079.079.069.069.079.089.109.109.139.159.169.179.209.219.239.249.259.26
8.78
8.91
8.81 8.79
8.89
8.74
8.88
8.88
Wall 0.8h Wall 0.6h
Wall 0.6h
Wall 0.7hWall 0.4h Wall 0.6h
14.2213.9914.3114.4714.5714.6514.83
14.74
14.7914.82
17.63RL
17.60RL
17.91RL
18.01RL 17.98
RL17.88RL
17.75RL
17.61RL
16.44RL
16.73RL
9.06
9.31
9.30
9.31
9.22
9.12
9.08
9.07
8.98
8.96
9.33
9.06
9.03
9.14
9.05
9.14
9.17
9.20
9.34
9.23
9.34
9.35
9.29
9.18
9.10
8.96
9.25
9.37
16.95RL
16.62RL
13.27RL
11.89
14.39
14.49
7.88
7.73
7.81
7.86
7.82
7.76
7.90
7.95
8.08
8.15
7.99
7.76
7.79
7.73
7.98
8.62
8.42
8.408.36
8.28
8.32
8.36
8.33
8.29
8.49
8.54
8.39
8.35
8.30
8.24
8.068.30
8.24
8.36
8.42
8.71
8.51
7.77
8.17
7.97
8.23
8.50
8.35
8.79
8.60
7.50
7.22
8.55
7.50
7.23
6.75
7.31
8.39
8.23
7.46
6.66
6.98
7.35
8.07
8.48
9.01
8.56
8.27
8.27
7.56
8.58
8.478.668.618.488.70
8.66
8.67
8.55
8.55
8.608.73
8.65
8.55
8.61
8.958.88
8.92
8.89
10.44
9.13
9.07
8.94
8.94
9.17POPO PO
PO
PO
Top of Fence Line
11.54
8.87
8.86
8.82
8.82
8.80
8.92
8.038.06
8.37
8.28
8.128.18
8.28
8.197.59
7.72
8.40
8.61
8.47
8.28
8.278.25
8.30
8.29
8.26 7.58
7.57
7.56
8.03
8.43
8.14
7.54
7.18
7.26
8.48
8.32
8.24
8.48
8.37
8.51
8.27
8.40
8.70
8.73
8.75
8.86
8.77
8.79
8.73
8.69
8.80
OHL
OHL
OHLs
OH
L
OHL
OHLsOHLs
OHLs
OH
LOHLOHLs
OHLsOHLs
OH
Ls
OHL
s
SCs
Wall 0.6h
TCGV
TC
8.28 OHL O
HLs
BUS STOP
Wall 0.6h
Arable Field
Arable FieldArable Field
Arable Field
Arable Field
Arable Field
Arable Field
Arable Field
Arable Field
Arable Field
Arable Field
8.548.53
UTS Wall - Behind Vegetation
UTS Wall - Behind Vegetation
UTS Levels - Private Property (from Local Information)
UTS Levels - Private Property (from Local Information)
UTS Levels - Private Property (from Local Information)
UTS Levels - Private Property (from Local Information)
UTS Levels - Private Property (from Local Information)UTS Levels - Private Property (from Local Information)
Ridge LineRidge L
ine
Ridge L
ine
Ridge L
ine
Ridge L
ine
Ridge Line
Ridge Line Ridge Line
Ridge Line
Ridge Line
Ridge LineRidge Line Ridge Line Ridge Line
Ridge Line
Ridge Line
Ridge Line
Ridge Line
8
8
8
8
8
8
8
8
8
8
9
9
9
99
9
9
9
9
9
9
9
9
10
10
1010
10
10
10
10
10
11
8.61
8.67
8.69
8.588.63
8.65
8.83
8.88
8.93
8.89
8.91
8.90
8.75
8.82
9.97
9.96
10.2710.18
10.3810.37
10.74
10.82
10.80
10.81
8.69
8.66
8.61
8.77
8.77
14.40RL
10.86 10.69
10.84
10.87
10.95
10.67
10.42
8.67
8.75
8.88
8.85
8.56
8.51
8.36
8.388.36
10.26
10.27
10.24
10.34
8.438.37
8.54
8.55
8.64
8.71 8.428.33 8.22
8.10
8.43
8.47 8.54 8.378.39 8.33
8.21
8.16
8.36
8.22
8.11
8.008.00
8.11
19.07RL
19.44RL
17.76RL
17.71RL
18.80RL
15.37
14.73
15.48
14.70
14.72
14.97 14.8514.76
14.76
18.22RL
17.31RL
18.12RL
17.69RL
17.93RL
17.09
16.8717.77
RL
8.73
8.70
8.788.71
8.788.64 8.57
10.1910.36
10.2710.56
10.5310.02
10.069.98
10.07
10.61 10.34
10.4710.4010.42
10.39
9.77
9.96
10.01
10.41
8.78 8.728.70
9.08
10.74
10.82
14.48
14.57
15.40RL
18.74RL
18.78
RL
18.84RL
18.88RL
16.05
16.05
15.94
11.43
10.5810.57
10.48 10.43
10.33
12.53
8.98
8.92
8.73
8.82
8.56
8.50
8.59 8.44
8.41
8.52
8.49
8.66
10.3410.61
10.39
10.16
8.61
10.36
10.67
10.7910.69
10.7310.7510.63
10.6910.62
10.41
9.43
9.049.28
9.85
9.87
9.529.43
9.3710.77
10.75
10.74
10.74
10.75
10.72 9.24
9.38
9.21
9.178.98
9.04
10.8710.89
9.18
9.61
9.29
9.19
9.20
9.30
9.45
18.27RL
14.84
18.91RL 18.82
RL
16.10
16.21
8.298.33
8.218.28
8.29
PO
POPO
PO PO
PO8.37
9.19
9.60
9.41
8.78
PO 8.93
8.77
8.26
8.33 8.36
8.78
8.60
8.61
8.44
8.54
9.399.289.21
7.78
7.51
9.049.21
7.66
9.49
9.419.44 9.39 9.42
9.36 9.35
9.389.39 9.41 9.56 9.49
9.39
9.25
9.05
9.55 9.55 9.41
9.44 9.44
9.44 9.43 9.47
9.43 9.46
9.48 9.35 9.32 9.269.099.079.229.13
9.038.71
7.66
8.20
8.04
7.43
8.32
8.97
8.528.59
8.138.16
8.098.23
8.168.238.248.488.46
8.34
8.46 8.558.42
8.288.16
8.11
18.11RL
17.82RL
12.52RL
11.58
11.73
8.097.96
8.02
7.98
8.058.06 7.99 8.05
8.05
7.937.90
7.277.32
7.27
9.049.33
9.31 9.23
9.22
9.139.02
9.009.20
9.069.05
10.059.95
10.10
10.24 10.08
10.3010.29
16.42RL
16.69RL
14.21
14.0014.11
8.00
8.318.14
8.17
8.148.02
8.03
9.09
9.04
9.26 9.32 9.27
9.35
9.289.63 9.60
9.469.46
8.39
8.128.15
8.23
8.128.12
8.25
8.94
9.64
11.97RL
11.08
8.09
8.22
8.08
8.01
8.06
8.07
8.17
9.23
12.01RL
13.22RL
16.90RL
11.09
11.77
12.0511.23
8.05
7.97
8.13
8.14
8.16
8.16
8.188.12
7.98
7.91
7.74
7.70
7.92 7.81
7.85
7.68
10.56
10.52
OHLs
Sub Sta
40
TOW
NFIELD
Mizaire
7
MASON WAY
4
Oshaw
a
Station
3
WALK
Factory
289
4
39
277
Pond
El Sub Sta
315
11
Pond
325
135
Mylah
1
33
22
Shelter
2
HORNER'S CORNER
5
337305
Zillah Lodge
Redlands
14
Villas
1
St Anton
4
HIGH STREET
Mandalay
6
The Cuddy
Boonwood
OLD
SCH
OO
L MEAD
OW
1
Townfield
8
Track
El
35
1
Beeleigh
GP
Verbrymar
21
Track
38
12
17
Police
T9 - B1Hornbeam
T2 - C1Bay
T3 - C1Silver Birch
T4 - C1Common Oak
T6 - A1Weeping Willow
G7 - C2Silver Birch, Sycamore
G7 - C2Silver Birch, Sycamore
G8 - C2Leyland Cypress
G8 - C2Leyland Cypress
G8 - C2Leyland Cypress
G10 - C2Silver Birch,Sycamore
G11 - C2Leyland Cypress
G12 - C1Crack Willow, Hawthorn,Blackthorn
G13 - C1English Elm, Bramble,Elder, Blackthorn
G11
G13 - C1English Elm, Bramble,Elder, Blackthorn
G13 - C1English Elm, Bramble,Elder, Blackthorn
G13 - C1English Elm, Bramble,Elder, Blackthorn
G12 - C1Crack Willow, Hawthorn,Blackthorn
G12 - C1Crack Willow, Hawthorn,Blackthorn
G12 - C1Crack Willow, Hawthorn,Blackthorn
G12 - C1Crack Willow, Hawthorn,Blackthorn
G12 - C1Crack Willow, Hawthorn,Blackthorn
G11 - C2Leyland Cypress
G11 - C2Leyland Cypress
T5 - A1Walnut
G10 - C2Silver Birch,Sycamore
G10 - C2Silver Birch,Sycamore
G10 - C2Silver Birch,Sycamore
Trees within G12 that are outsidethe fencing line are to be removedas required.
T1 - B1Weeping Willow
5 10 15 20 25m0
Date Details Drawn
drawn: checked:dwg no:
scale:
drawing:date:
scheme:
June 2016
JS
High Street (land to southof), Great Wakering
Tree Protection Plan
1:500@A0
MW
Rev
client: Taylor Wimpey
AC
D
Copyright of ACD. All rights described in Chapter IV of the Copyright, Designs andPatents Act 1988 have been generally asserted: 2015. Copyright of this plan remains
with ACD until all fees have been paid in full.
The original of this drawing wasproduced in colour- a monochrome
copy should not be relied upon.
TWEL20425-03
ACDEcology
ArboricultureLandscape Architecture
ACD at these offices:Rodbourne Rail Business Centre, Grange Lane,
Malmesbury, SN16 0ESTel: 01666 825646
Courtyard House, Mill Lane, Godalming, GU7 1EYTel: 01483 425714
Suite 6, Crescent House, Yonge Close, Eastleigh, SO50 9SXTel: 02382 026 300
email: mail@acdenv.co.ukwww.acdenvironmental.co.uk
Archaeology
ENVIRONMENTAL
WimpeyTaylor
Foot traffic Scaffolding
Protectivefencing
Ground undisturbed and protected by geotextilefabric , woodchip and side-butting scaffold boards
Protectedarea
Platform levelat first lift ofbrickwork
Protectedarea
Protectivefencing
For pedestrian movements only, a single thickness of scaffold boards should be placed eitheron top of a driven scaffold frame, so as to form a suspended walkway, or on top of acompression-resistant layer (e.g. 100 mm depth of woodchip), laid onto a geotextile.
For pedestrian operated plant up to a gross weight of 2 t, proprietary, inter-linked groundprotection boards should be placed on top of a compression-resistant layer (e.g. 150 mm depthof woodchip), laid onto a geotextile.
For wheeled or tracked construction traffic exceeding 2 t gross weight, an alternative system(e.g. pre-cast reinforced concrete slabs) should be employed to an engineering specificationdesigned in conjunction with arboricultural advice to accommodate the likely loading to which itwill be subjected.
RESTRICTIONS WITHIN TREE PROTECTION AREASInside the exclusion area of the fencing, the following shall apply:
• No mechanical excavation whatsoever• No excavation by any other means without arboricultural site supervision• No hand digging without a written method statement having first been approved by
the project arboriculturist.• No lowering of levels for any purpose (except removal of grass sward using hand
tools)• No storage of plant or materials• No storage or handling of any chemical including cement washings• No vehicular access• No fire lighting
In addition to the above, further precautions are necessary adjacent to trees:• No substances injurious to tree health, including fuels, oil, bitumen, cement
(including cement washings), builders sand, concrete mixing and other chemicalsshall be stored or used within or directly adjacent to the protection areas of retainedtrees
• No fire shall be lit such that flames come within 5m of tree foliage.
TREE TO BE REMOVED
ROOT PROTECTION AREA (RPA) FOR RETAINED TREES
A CATEGORY TREEB CATEGORY TREEC CATEGORY TREEU CATEGORY TREE
NO-DIG SURFACECellular confinement system (CCS) to be used to create this area of hardsurface, above the existing ground level. Topsoil to be retained. Depth ofCCS to be 50-75mm for pedestrian surfaces and 100-200 for vehicularsurfaces. Surface to be porous to approved details and specifications. Tobe installed under arboricultural supervision. All specifications subject toengineering design.
WHY TREE PROTECTION IS NEEDED1) Soil compaction kills roots- caused by plant movement and storageof materials within protected areas.2) Trenching severs roots- many small roots grow within the top600mm of soil. Even the removal of the top 200mm can cause damage.3) Soil pollution kills roots- Dripping fuel storage or cement washingscan contaminate the soil resulting in root death.4) Raising & lowering levels kills roots- the soil used to increaselevels can compact the underlying soil (see point 1). Lowering levels willremove roots causing damage to the tree.5) Bark and branch damage- bark removal and branch damage canallow disease and fungi into the tree.The impact of any of the above can take years to show- trees canhave huge reserves of food and water.
CONSTRUCTION EXCLUSION ZONE
Root protection areas (RPA) of retained trees within which all construction activity is restricted.
All trees that are being retained on site must be protected by barriers and/or ground protectionbefore any materials or machinery are brought onto the site, and before any demolition,development or stripping of soil commences. Where all activity can be excluded from the RPA,vertical barriers must be erected to create a construction exclusion zone. Where, due to siteconstraints, construction activity cannot be fully or permanently excluded in this manner from allor part of a tree’s RPA, appropriate ground protection can be installed.
DEFAULT POSITION FOR THE TREE PROTECTION BARRIERS.
BS5837:2012 Figure 2- barrier specification
GROUND PROTECTIONWhere the set-back of the tree protection barrier would expose unmade ground to constructiondamage, new temporary ground protection should be installed as part of the implementation ofphysical tree protection measures prior to work starting on site.
Examples of alternative barrier designs can be found in the method statement. Should analternative design be more viable and appropriate, it must be agreed with the projectarboriculturist before its implementation.
1 Standard scaffold poles2 Heavy gauge 2m tall galvanized tube and weld mesh infill panels3 Panels secured to uprights and cross-members with wire ties4 Ground level5 Uprights driven into the ground until secure (minimum depth 0.6m)6 Standard scaffold clamps
5
4
6
3
1
2 m
3 m
4
4
4
6
6
6Original ground
level level
Peg and board edging
Top soil toBS3882:2007
Depressionsand soft spots information to befilled with sharpsand to levelsrequired
Porous surface to finish
TreeTex T300 non-woven geotextile orsimilar approved laid over formation
CCS/Cellularconfinement system(Geosynthetics CellWebor similar approved)
Cells to be filled with 20-40mm clean graded angularstone to manufacturers details and specifications
TreeTex T300 geotextile or similar laid over CellWeb
Head Office
Rodbourne Rail Business Centre Grange Lane Malmesbury SN16 0ES
Tel: 01666 825646
Surrey Office
Courtyard House Mill Lane
Godalming GU7 1EY
Tel: 01483 425714
Hampshire Office
Suite 6 Crescent House
Yonge Close Eastleigh
SO50 9SX
East Anglia Office PO Box 1272 CAMBRIDGE
CB1 0YR
Tel: 07825 868654
Email: mail@acdenv.co.uk Website: www.acdenvironmental.co.uk
ECOLOGY * ARBORICULTURE ARBORICULTURAL SITE MONITORING AND SUPERVISION * ARCHAEOLOGY
LANDSCAPE & VISUAL IMPACT ASSESSMENT * LANDSCAPE DESIGN & PLANNING LANDSCAPE AUDIT * PROJECT MANAGEMENT * EXPERT WITNESS
LANDSCAPE MANAGEMENT