arboricultural method statement for the protection of
TRANSCRIPT
Page 1 of 4
14th August, 2015
Our Ref.: AR/3416AMS/rg
Application Ref. No: 14/01562/OUT
Pegasus Life Ltd., c/o Mr Graham Starling, Gleeds, 95 New Cavendish Street, London, W1W 6XF
Arboricultural Method Statement for the protection of trees along Seal Drive during the proposed re-development at Wildernesse Estate, Sevenoaks, Kent, TN15 0EA
Dear Mr. Starling,
Thank you for your instruction to provide an Arboricultural Method Statement for the protection of trees along Seal Drive which will serve as the main access road during the Demolition Phase and initial Construction Phase of the approved re-development (Planning Application Ref no.: 14/01562/OUT) at Wildernesse House, Wildernesse Avenue, Sevenoaks.
I have been supplied with the Demolition Method Statement (Ref no.: G/777/11671/DW/00) compiled by 777 Demolition, dated 27th May 2015, Demolition Vehicle Access Plan (Fig 1) by Odyssey Markides, dated May 2015,Tree Protective Fencing Plan – General Arrangement (drawing no.: LL454-400-0028) and Tree Protective Fencing Plans - Detailed Arrangement (drawing nos.: LL454-400-0051, LL454-400-0052, LL454-400-0053, LL454-400-0054, LL454-400-0055) by Camlins Landscape Architects, dated May 2015.
The construction route for the demolition and enabling works and initial construction activities will be from the A25 via Seal Drive and into Wildernesse Avenue, as shown at Appendix A. This route will remain in use until such time as the construction access plan for the Construction Phase has been agreed by Kent County Council and the proposed new access road off Park Lane has been constructed.
Seal Drive is a single carriageway with a sealed tarmac surface. The trees either side of the road are at varying distances to the road edge and are growing within a grass verge. As shown in photographs 1 and 2 below.
Page 2 of 4
Arboricultural Method Statement for the Protection of Trees at Our Ref.: AR/3416AMS/rg Seal Drive, Sevenoaks, Kent, TN15 0EA 14th August, 2015
I visited site on the 4th August 2015 and inspected the trees growing along either side of
Seal Drive, particularly the three trees growing adjacent to the A25 and Seal Drive junction. The trees comprise predominantly lime but with English oak towards the south-eastern end.
The protection status of the trees has not been investigated, however the site, including
Seal Drive and Wildernesse Avenue are situated within Wildernesse Conservation Area.
This method statement has been drawn up to comply with the recommendations of British Standard BS 5837: 2012, Trees in relation to design, demolition and construction – Recommendations [BS5837].
I have set out the protection and working methodology relevant to trees under the following headings, along with three appendices:
1. Tree pruning,
2. Tree protection along Seal Drive,
3. Trunk wrapping,
4. General matters. Appendix A. Demolition Vehicle Access Plan by Odyssey Markides Appendix B. Tree Protective Fencing Plan – General Arrangement by Camlins
Landscape Architects Appendix C. Trunk Wrapping Detail
1. Tree Pruning. 1.1 The vehicles accessing the site will vary between small vans, 40ft skip lorries, four axle
trucks to flatbed articulated vehicles. 1.2 The pruning requirements to create the required headroom underneath the crown
overhang to Seal Drive are based on the approximate maximum vehicle height using the access road, and I recommend a 4m clearance is provided.
Photograph 2. Looking south-east along Seal Drive
Photograph 1. Looking north-west along Seal Drive
Page 3 of 4
Arboricultural Method Statement for the Protection of Trees at Our Ref.: AR/3416AMS/rg Seal Drive, Sevenoaks, Kent, TN15 0EA 14th August, 2015 1.3 Where branches overhang the road these are to be pruned back in line with the road
edge to the recommended height of 4m. This will require the removal of small branches only and will not have any significant effect on the health and physiological condition of these trees and will not detract from the character or appearance of Seal Drive.
1.4 In relation to potential large loads using the access road, appropriate measures will be
implemented at such time, in order to minimise potential damage to overhanging branches above 4m, and may include additional pruning or the temporary tying back of branches.
1.5 Pruning works will be required to be in accordance with British Standard 3998:2010 Tree
work - Recommendations [BS3998]. 2. Tree Protection. 2.1 With reference to the Geological Survey Drift Map, Sheet 287, Sevenoaks, the site is on
the Lower Greensand Group, namely Sandgate Formation which consists of fine sands, silts and silty clays, and Folkestone Formation which comprises medium and coarse-grained, well-sorted cross-bedded sands and weakly cemented sandstones. Quaife Woodlands has not investigated the clay content of the soil and subject to a formal soil investigation I have assumed there to be some clay present. Clay is a shrinkable soil, susceptible to compaction which is harmful to tree roots.
2.2 Where tree roots pass beneath Seal Drive, the road itself provides adequate ground
protection to prevent root damage from compaction as a result of increased road usage. There is considerable root mass beyond the RPA and even if there were to be some loss to root fibre function under the road, overall it will be a minor proportion of the assimilative root mass. On that basis I am satisfied that no additional ground protection is required.
2.3 Some form of separation barrier is required to prevent vehicles encroaching onto the
grass verge along both sides of Seal Drive, to prevent direct damage to the trunks of retained trees, and to avoid compaction of the soil, which can arise from the single passage of a heavy vehicle, and so that the trees root functions remain unimpaired.
2.4 Within the verge area the combined zones of RPAs form the Construction Exclusion
Zone [CEZ] and will be protected using a series of timber bollards positioned at 3m intervals along both sides of Seal Drive, and as shown at Appendix B, and similar to those recently installed along Wildernesse Avenue.
2.5 The holes will be hand dug with a “shuv-holer” or something similar, which is a tool
enabling holes to be dug at the required diameter, thus minimising the extent of excavation, and to a depth of approximately 400mm to 500mm. Any roots smaller than 25mm diameter may be pruned back, making a clean cut. Where roots occur in clumps or roots over 25mm are identified these will be severed following consultation with the appointed arboriculturalist, or the spacings of the timber bollards moved accordingly.
2.6 This timber bollards are to be set in place before any work commences on site.
Page 4 of 4
Arboricultural Method Statement for the Protection of Trees at Our Ref.: AR/3416AMS/rg Seal Drive, Sevenoaks, Kent, TN15 0EA 14th August, 2015
3. Trunk Wrapping.3.1 Three trees at the junction of the A25 and Seal Drive on the eastern side are in close
proximity to the road edge and require trunk protection.
3.2 I have been advised that trunk wrapping using padding and chestnut battens is the preferred method of tree protection, and I attach a method for Trunk Wrapping at Appendix C.
4. General Matters.4.1 The protection measures are to be overseen by an individual, e.g. the Site Agent, to be
responsible for all arboricultural matters on site. There will be an initial induction meetingwith all those involved in attendance. This person must:
a) be present on site for the majority of the time,b) be aware of the arboricultural responsibilities,c) have the authority to stop any work that is causing, or has the potential to
cause harm to any tree,d) be responsible for ensuring that all site operatives are aware of their
responsibilities toward trees on site and along the access roads, and theconsequences of any failure to observe those responsibilities,
e) make immediate contact with the local authority and/or a retainedarboriculturalist in the event of any tree related problems occurring, whetheractual or potential.
I have taken account of the information provided to me and I am satisfied that the tree pruning requirements and tree protection measures I have set out with regard to the use of Seal Drive as the main demolition and initial construction access are fully in accordance with current standards and guidance.
Yours sincerely,
Becki Gawthorpe
Appendices:
Appendix A – Demolition Vehicle Access Plan Appendix B – Tree Protective Fencing Plan – General Arrangement Appendix C – Trunk Wrapping Detail
Job Title
Drawing Title
Job No
Drawn
Scale
Checked
Date
Rev
Designed
Approved
Client Drawing No
Telephone: 01256 331144
Fax: 01256 331134
W: www.odysseymarkides.com
Tuscany House
White Hart Lane
Basingstoke
Hampshire RG21 4AF
P:\14-345 - Wildernesse House, Sevenoaks\Tech\Acad\Drawing\Figures\Construction Access\14-345 Fig 1 Construction Access Option 1.dwg
WILDERNESSE HOUSE, SEVENOAKS
DEMOLITION VEHICLE ACCESS
1:10,000 MAY 15 MS
MS ACM ACM
14-345 FIGURE 1
N
REPRODUCED FROM ORDNANCE SURVEY R BY THE
PERMISSION OF THE CONTROLLER OF HER MAJESTY'S
STATIONERY OFFICE. C CROWN COPYRIGHT. ALL
RIGHTS RESERVED. LICENCE NUMBER 100045322.
SUNNYSIDE MEWS
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98 .0
98 .5
99 .0
99 .5
97 .0
94 .5
95 .0
96 .0
94 .5
95 .5
92 .5
93 .5
94 .0
92 .0
94 .0
92 .5
92 .0
90 .36IC
89 .90IC
IC
IC
90 .82IC
90 .87re
IC90 .82IC
90 .85IC
90 .82IC
IC
90 .68IC
90 .67IC
90 .71IC
90 .90IC
90 .89IC
90 .86IC
90 .88re
90 .85IC
IC
90 .82IC (RE)
90 .82IC
IC
IC91 .44IC
IC
91 .52IC
91 .51IC
91 .47IC
IC
IC
91 .85ICIC
sc
IC
91 .86IC
92 .20RE
92 .62RE
IC
91 .92IC
91 .92IC
91 .89RE
91 .92RE
IC
91 .85RE
IC
91 .90RE
91 .92IC
IC
IC
92 .60RE
92 .62IC
92 .64RE
92 .68IC
RE
92 .11IC
91 .57IC
91 .51IC
IC
IC91 .85IC
IC
91 .85IC
IC
IC
91 .85IC
91 .63IC
thre
shol
d 9
0.9
1
89 .95
threshold 92 .14
hand rail
hand railhand rail
hand rail
hand rail
hand rail
hand rail
ditch
91 .92IC
91 .91IC
IC
IC91 .93IC
IC
91 .00IC
90 .87IC
90 .87IC
90 .88IC
91 .28IC
IC
IC
91 .90IC
92 .23IC
92 .25IC91 .88
re
IC
IC
IC
IC
IC
89 .91IC
hand rail
hand
rail
hand
rail
hand
rail
hand
rail
hand
rail
hand rail
90 .271
554615 .178156459 .116
89 .711
554632 .012156484 .471
90 .750
554604 .430156438 .463
B
D
C
X
87 .954
554592 .810156776 .051
Y
89 .060
554602 .690156741 .081
High Street
Seal Drive
sw 150¯
IL 86.81
IL 87.99150¯
225¯
225¯
sw 150¯
IL 87.79
IL 88.23
225¯
sw 150¯
IL 88.10
sw 150¯
sw 1
50¯
100¯
UTL
100¯
UTL
100¯
100¯
100¯
UTL
(UTL)
(UTL)
IL 89.50
IL 89.70
(UTL)
(UTL)
225¯
100¯
100¯
IL 90.22
IL 90.26
(blocked)
(UTL)
IL 90.38
IL 90.48
IL 90.37
100¯100¯
100¯
IL 90.56
IL 90.44 IL 90.64
100¯
100¯ IL 90.84
IL 89.75
(RE)
IL 91.23
IL 91.21
100¯
100¯
91 .87MH
IL 91.28
100¯
IL 91.29
IL 91.04
100¯
100¯
IL 91.08
IL 91.28
IL 91.42
100¯
IL 91.23
100¯
IL 91.23
100¯
IL 91.19100¯
IL 91.23
IL 91.2691 .91IC
IL 91.20
100¯
100¯ 100¯
IL 90.67IL 91.26
91 .93IC
IL 91.24
IL 90.49
100¯
100¯
(UTL)
IL 90.43
100¯
(UTL) 220¯
IL 90.45
IL 90.23100¯
(UTL)
100¯
IL 89.86
IL 89.79
100¯
91 .60IC
IL 90.99
100¯
ICblocked
(UTL)
IL 90.86
blocked
(UTL)
IL 90.83
100¯
IL 91.06
100¯
(UTL)
(UTL)
IL 91.99100¯
IL 92.01
100¯
88 .05slab
d i t c h
d i t c h
d i t c h
d i t c h
d i t c h
B1
89 .316
554637 .272156517 .353
B3
88 .328
554648 .984156581 .377
B4
87 .405
554645 .992156613 .469
B5
89 .179
554605 .672156740 .719
B6
92 .817
554423 .189156529 .997
B7
99 .471
554417 .351156427 .994
B8 96 .403
554422 .057156475 .769
B10
93 .719
554465 .687156509 .036
B9
95 .920
554474 .058156495 .404
B11
100.273
554515 .952156409 .950
B12
97 .729
554594 .342156265 .738
sc
sc
sc
IL 89.89
re
220¯
IL 8
9.80
L
91 .816
554928 .715156484 .406
M
91 .360
554937 .938156550 .740
W
94 .837
555002 .177156623 .321
Wildernesse Avenue
Parl Lane
Wildernesse Avenue
d i t c h
d i t c h
B2
87 .515
554675 .026156524 .992
d i t c h
d i t c h
d i t c h
d i t c h
A4
97 .053
555075 .416156623 .753
IL 92.49
sw 225¯
A1
103.456
554949 .767156299 .051
A2
102.911
555036 .755156340 .121
A7
111 .872
555040 .728156108 .040
M
103.155
554912 .044156294 .232
N 103.237
554887 .200156283 .641
O
105.412
554804 .012156295 .338
P106.165
554797 .620156251 .616
threshold 104 .30
threshold 104 .30threshold 104 .29
threshold 104 .32
threshold 104 .30
RE104.26
104.00Stopcock
104.30IC
104.29IC
Q
108.169
554813 .545156208 .181
R
107.42RE
threshold 107 .50
threshold 107 .50
threshold 107 .49
threshold 107 .47
threshold 107 .47
threshold 104 .30
threshold 104 .31
threshold 104 .30
threshold 104 .30
threshold 104 .30
threshold 104 .30
threshold 104 .32
107.37RE
104.27RE
104.27RE
104.27RE
104.27RE
104.26RE
104.28IC
104.30RE
104.28RE
107.38RE
head 106 .76
head 106 .41
cill 106 .30
cill 104 .31
cill 105 .14cill 108 .30
S109.460
554891 .584156177 .478
T
108.876
554847 .090156203 .340
threshold 107 .49
threshold 107 .49
threshold 109 .70
threshold 109 .70
threshold 109 .71
head 109 .71head 109 .71
head 109 .70
head 114 .32
head 111 .79
head 111 .80
cill 108 .38
cill 113 .02
cill 110 .51
cill 113 .32
109.66
threshold 109 .70
threshold 112 .31
threshold 112 .26
threshold 112 .26
threshold 112 .27
threshold 104 .31
threshold 107 .47
over head cable
over head cable
cill
110
.23
cill
113
.03
cill 113 .02
cill 110 .53
cill 113 .31 cill 110 .81
cill 115 .68
cill 113 .40 cill 112 .29
cill 113 .17
cill 113 .09
cill 115 .68
cill 112 .25
cill
112
.85
cill 113 .34
cill 115 .69
cill 113 .03
cill 108 .32
cill 105 .15
cill 106 .74
cill 108 .33
cill 104 .32
head 114 .31
head 111 .80
head 111 .80
head 111 .80head 111 .80
head 114 .31
head 116 .98
head 116 .99head 114 .13
head 114 .41
head 114 .40
head 114 .10
head
111
.80
head
114
.34
head 106 .76
head 109 .70
head 106 .43
head 109 .71
head 109 .69
114 .62
120.94
120.93
114 .62
119 .42
119 .36
112 .07111 .70
u/si
de b
eam
109
.70
wal
l ht
111
.70
wal
l ht
109
.76
104.27RE
104.27RE
109.065
554799 .538156213 .356
depth 100 .48
150¯(UTL)
depth 100 .71
(UTL)
IL 103.12
IL 103.59
(UTL)
IL 103.68
IL 106.16
IL 106.21
IL 106.11
100¯
100¯
100¯
150¯
100¯
100¯
100¯
IL 103.61
100¯ IL 106.50
IL 103.44
(UTL)
soakaway
soakaway
IL 101.41
100¯
(UTL)
IL 101.22
100¯
IL 102.77
IL 108.48
100¯
IL 108.59
100¯
(UTL)
IL 108.83
100¯
(blocked) IL 106.50
100¯
IL 111 .01
IL 110 .68
100¯
100¯
100¯
100¯
100¯IL 104.00
100¯
KEY:
Root Protection Zones
Existing Trees To Be Retained
Protective Fencing (Standard)
Protective Fencing (Low Activity)
Chestnut Pailing Fence wrapped and secured to tree to provide additional protection.
Cam
lins
Ref
: PE
GAS
US
GEN
ERAL
/LL4
54 W
ILD
ERN
ESSE
HO
USE
/Cam
lins
Wor
k/D
raw
ings
/LL4
54-4
00-T
ende
r [R
ef.:
LL45
4REF
-400
-PU
BLIC
REA
LM B
ASE]
NOTES1. All dimensions in millimetres unless otherwise shown.2. All levels in metres above Ordinance Datum (mAOD) unless otherwise shown.3. All dimensions to be checked on site and any discrepancies reported to Employer
before pricing / work starts.4. Any ambiguities or discrepancies within this drawing and any other information given
elsewhere must be reported to Camlins and the Employer for clarification before pricingwork proceeds.
5. All drawings to be read in conjunction with other Camlins drawings and specificationinformation as required.
6. Refer to relevant Engineer's and Architect's work packages as appropriate forconfirmation of all engineering and architectural details.
7. All works to be carried out in accordance with the latest British Standards andappropriate codes of practice as a minimum.
Landscape Architects, New Dolanog House, Severn Road, Welshpool, Powys, SY21 7APTel: 01938 554886 / [email protected] / www.camlins.com
TENDER
WILDERNESSE HOUSEPEGASUSLIFE
General Arrangement - Protective Fencing Plan
Drawing No. Revision Scale DateLL454-400-0028 – 1:1250@A1 27.04.2015Drawn by Checked bySB AN
Revisions
N
Rev Date Description Revised by Checked by
- - - - -
Notes:Pre Construction Works:A pre-commencement site meeting shall be held prior to any works commencing on site, to agree all approved processes with the arboricultural consultant, tree works contractor, construction personnel and Seven Oaks District Council. This meeting should formally agree the methods of work, position of site facilities, material storage, compounds and tree protection measures prior to commencement of works on site.
No notice boards, cables, nails or other items shall be attached to any part of any retained tree.
Site operations, such as deliveries or machine operation shall be organised to avoid damage to the trunk or crown of the off site boundary trees. A Banksman shall be employed if machinery is passing or working close to retained trees.
Materials which could contaminate the soil e.g. concrete mixing, fuel, vehicle washing etc., shall not be discharged within 10m of thee stem of the retained group of trees and not on ground that slopes down to existing trees. Phytotoxic materials for use on site will be kept to an absolute minimum and stored on the hard standing to the south east corner of the site. All fuels will be held in bunded containers to prevent accidental spillage or leakage.
Fires will not be permitted on site.
Chestnut Pailing Fence
100m0m 50m10mScale 1:1250
10m
Typical Image Of Chestnut Pailing Fence
Buildings Proposed to be DemolishedRefer to Architects Drawings for Details
Appendix C
Trunk Wrapping for the Protection of Trees
(Adapted from AS4970 2009 Protection of trees on development sites)
1. Where a tree is to be retained and a Construction Exclusion Zone [CEZ] cannot beadequately established due to restricted access e.g close proximity of trees to access, thetrunk and branches in the lower crown will be protected.
2. The trunk and branches will be protected by wrapping two layers of hessian or carpetunderfelt around the trunk and branches for a minimum of 2m or as lower branches permit.
3. Wire or rope is used to secure 75x50x200 mm hardwood battens together around the trunk.These battens are not to be nailed or screwed to the trunk or branches.
4. The number of battens to be used is as required to encircle the trunk and the battens are toextend to the base of the tree.
5. The trunk protection is to be erected before any work commences on site, is to remain in situundamaged for the duration of all work or each phase, and only to be removed once all workis completed.
AS4970 2009 - Figure 4: Examples of Trunk, Branch and Ground Protection