llyn tegid reservoir safety project phase 1 habitat survey ... · the survey was carried out by...
TRANSCRIPT
Llyn Tegid Reservoir Safety Project
Phase 1 Habitat Survey Report for additional site
areas and validation
September 2019
This page intentionally left blank
Natural Resources Wales Phase 1 Habitat Survey Report
Black & Veatch Limited 122918/2019
i
PHASE 1 HABITAT SURVEY REPORT FOR ADDITIONAL SITE AREAS
CONTENTS
1. INTRODUCTION 1
1.1 Background ................................................................................................................................. 1
1.2 Scope of Survey .......................................................................................................................... 1
2. METHODS 1
3. LIMITATIONS 1
4. RESULTS 2
4.1 Habitats Recorded ...................................................................................................................... 2
4.2 Potential for Protected Species .................................................................................................. 3
5. RECOMMENDATIONS 4
6. REFERENCES 4
Natural Resources Wales Phase 1 Habitat Survey Report
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Details of document preparation and issue:
Version
no. Prepared by Reviewed by Authorised for issue Issue date Issue status
P01 Gary Noble Emma Stevens Stephen Cavanagh 06/08/19 For comment
P02 Gary Noble Emma Stevens Stephen Cavanagh 20/09/19 Final
B&V project no. 122918 Client’s reference no.
Notice:
This report was prepared by Black & Veatch BV Ltd solely for use by Natural Resources Wales. This report is not
addressed to and may not be relied upon by any person or entity other than Natural Resources Wales for any purpose
without the prior written permission of BV Ltd. BV Ltd, its directors, employees and affiliated companies accept no
responsibility or liability for reliance upon or use of this report (whether or not permitted) other than by Natural
Resources Wales for the purposes for which it was originally commissioned and prepared.
In producing this report, BV Ltd has relied upon information provided by others. The completeness or accuracy of this
information is not guaranteed by BV Ltd.
Natural Resources Wales Phase 1 Habitat Survey Report
Black & Veatch Limited 122918/2019
1
1. INTRODUCTION
1.1 Background
Natural Resources Wales (NRW) are proposing to undertake safety modifications to the
impounding structures at Llyn Tegid, Gwynedd, North Wales. Llyn Tegid is a natural lake
with approximately 2,950m of embankment at its northern end. The outflow is controlled
by Bala Sluices, which is a gated control structure that controls the combined outflow from
Llyn Tegid and the Afon Tryweryn. This allows Llyn Tegid to be used for flood control and
to regulate the River Dee downstream.
The proposed modifications to the existing water impounding structures comprise of
reinforcement of landward / downstream embankment faces with buried 3D geotextile
mat (Enkamat or similar) and upgrading of existing rip rap upstream slope protection on
the lake embankment with additional imported stone material.
1.2 Scope of Survey
A Preliminary Ecological Appraisal (PEA) for the Project area was carried out by Enfys
Ecology (2017) which included a Phase 1 habitat plan of the Project area. Since then the
Project has developed and additional areas were added to the Project that are to be used
for site compounds, construction access routes and potential habitat enhancement areas
(referred to as the ‘survey area’ within this report). This Phase 1 habitat report only covers
the additional areas and does not cover all the Project area as this has already been
completed in 2017 (Yardley 2017) and by a more recent Phase 1 habitat report completed
by Exegesis in 2018 (Lush 2018). During this survey, however, habitats were validated from
the 2017 survey to see if any habitats have changed significantly.
This report is to be used as an addendum to the existing PEA, which can both be used to
support the Project planning application.
2. METHODS
The survey was carried out by Black & Veatch’s Ecologist, Gary Noble on the 17th July 2019.
The additional areas for the Project were walked by the ecologist and the habitats mapped
and classified using the standard Phase 1 habitat survey methodology (JNCC 2010). Notes
were taken on the habitats present and target notes were used to record any habitats and
features of note, including the dominant plants that were present. The survey area can be
found in the Phase 1 habitat survey drawing in Appendix 2 and the target notes can be
found in Appendix 1.
During the survey, habitats were also assessed for their suitability to support protected
and notable species, and field signs indicating their presence or absence were recorded.
The distribution and extent of widespread, visible invasive non-native species (INNS) were
also noted where found. A systematic survey for INNS was not conducted as part of this
survey.
3. LIMITATIONS
The survey undertaken for this report does not comprise a full list of plants and animals
that may be present within the survey area. The protected species appraisal provides a
Natural Resources Wales Phase 1 Habitat Survey Report
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preliminary view of the likelihood of protected species occurring at the survey area. It
should not be taken as providing a full and definitive survey of any protected species group.
4. RESULTS
4.1 Habitats Recorded
Improved/poor semi improved neutral grasslands
The majority of the fields in the survey area were classed as improved neutral grasslands
that at the time of survey had been recently managed through mowing (Target notes 2 and
9). Other improved fields in the survey area at the time of survey were currently being
used to graze sheep and cattle (Target notes 12, 14 and 15). Species diversity and
composition within improved fields is generally low only containing species that are
indicative of improved neutral grasslands. Other areas of grassland within the survey area
contained unmanaged grassland habitat that were classed as poor semi improved
grassland (Target notes 13 and 18) as species diversity within these grasslands was
generally more diverse. The area of grassland on the island (Target note 22) has been
classed as semi improved grassland due to more species of flowering plants present.
Hedgerows
Hedgerows within the survey area were classed as species poor hedgerows containing five
or less woody species (Target notes 1, 4, and 16). Hedgerows were usually intact with
minimal gaps with some hedgerows containing standard broadleaved trees within the
hedgerow line (Target note 11).
Scattered broadleaved trees
The majority of the field boundaries within the survey area contained a mixture of mature
broadleaved trees (Target notes 5, 6, 7, 8, 10 and 17). Trees generally in good condition
with some trees clad with thick ivy.
Ditch
Only one ditch recorded within the survey area. At the time of survey, the ditch contained
running shallow water (Target note 4).
Invasive and non-native plants
Invasive plants such as Indian balsam Impatiens glandulifera and Japanese knotweed
Fallopia japonica are known to be within the area. Indian balsam is present and managed
along the foreshore of the lake and within the riparian habitats along the rivers within the
survey area. Monkeyflower Mimulus guttatus is present along a ditch (Target Note 4).
Validation of habitats from previous phase 1 habitat surveys
The majority of the habitats recorded from the 2017 and 2018 phase 1 habitat surveys
have not changed significantly since this survey in 2019. Differences occur in classifying
the neutral grasslands. The Enfys 2017 survey has classed some areas as poor semi
improved grassland, whereas the Exegesis report has classed them as semi improved
grassland around the meadow areas adjacent to the rivers. This is likely that the 2017
survey was carried out in October and some of the flowering species recorded in the 2019
Natural Resources Wales Phase 1 Habitat Survey Report
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survey were not visible in the autumn. This survey from 2019 has classified some of the
meadow areas on the island as semi improved neutral grassland due to presence of more
flowering plant species.
4.2 Potential for Protected Species
Bats
From biological records and recent surveys, bats are known to be using the survey area for
foraging and commuting. The mature trees along the various field boundaries have
potential to support roosting bats as they contain potential roosting features (PRFs) such
as holes, cracks and broken limbs. Some large mature trees also are covered in ivy which
are likely to obscure further PRFs.
Badgers
No badger setts or signs were observed within the survey area. The habitats within the
survey area are generally suitable to support badgers given the presence of suitable
foraging areas and areas where setts could be newly created, particularly along field
boundaries.
Breeding birds
The habitats within the survey area, such as trees and hedgerows have good potential to
support breeding birds.
Great crested newts (GCN)
The Enfys 2017 PEA report stated that there are no records of GCN within the area. The
pond within the survey area (Target note 19), at the time of survey was mostly dry and
contained no water. Given the lack of records and no suitable waterbodies within the
general area, GCN are unlikely to be affected by the proposed works.
Otters
Otters are known to be present within the area and are known to use the lake foreshore
and the rivers close to the proposed construction areas. Within the survey area there were
no suitable rivers that could support otter, but adjacent terrestrial habitat could be used
for otter holts and resting areas.
Reptiles
The Enfys 2017 PEA report stated there are no records of reptiles within the survey area.
Suitable habitat for reptiles exists along some field boundaries within the survey area, such
as rough unmanaged grassland strips and the meadow areas that are adjacent to the river
(Target notes 3, 4, 13, 18, 21 and 22). Slow worms have also been reported to be present
within the Rip Rap areas along the foreshore of the lake. No slow worms were observed
during the site investigations works that took place in June 2019.
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5. RECOMMENDATIONS
The recommendations in this report are for the survey area only. Reference should also
be made to the Enfys 2017 PEA report which details the recommendations for the entire
Project.
• Field boundaries and buffer zones – the boundaries of the fields should be
protected from any compound construction by creating buffer zones around the
field boundaries to protect tree protection zones (informed by an arboricultural
survey), ditches and any unmanaged grass strips that are present along some of
the field boundaries. Encroachment should be prohibited into the buffer zones at
all times;
• Bats – if any mature trees are affected by construction compounds or access routes
then further detailed assessments will be required to assess the tree/s suitability
to support bat roosts. If suitable and the tree will be impacted by proposed works,
then further surveys will be required either through or in combination with tree
climbing surveys to inspect PRFs followed by dawn/dusk emergent/re-entry
surveys;. Any works that effects bat roosts should be undertaken under license
from NRW;
• Breeding birds - Any vegetation removal required for a site compound or access
routes to be removed outside the breeding bird season. The main breeding bird
season is considered to be between March and September;
• Reptiles – areas of rough unmanaged grassland located on the borders of some
field boundaries to be protected. If these are to be disturbed for a site compound
and/or any construction access routes, then sensitive habitat removal should be
completed prior to works to discourage reptiles from the working area. This type
of method should only be used for small areas and includes removing the grassland
habitat in a two stage sensitive cut under ecological watching briefs;
• Badgers – a pre-construction check should be made before construction of the site
compound to ensure no new setts have been created close to proposed works;
• Otters – a pre-construction check for otters along rivers and in areas along field
boundaries close to the lake foreshore; and
• Invasive species – any invasive species should be dealt with in line with the Projects
invasive species management plan.
6. REFERENCES
JNCC (2010) Handbook for Phase 1 Habitat Survey: A Technique for Environmental Audit.
First published 1990; reprinted in 1993; reprinted in 2003 with limited revisions &
additions; reprinted in 2004; reprinted in 2007 with minor additions; reprinted in 2010
Lush M J (2018) Aerial, Phase 1 and NVC Survey Report – Llyn Tegid Reservoir Safety
Project, Exegesis. Version 4.
Yardley T (2017) Preliminary Ecological Appraisal Survey Report – Llyn Tegid Embankments,
Enfys Ecology.
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APPENDIX 1 – Phase 1 habitat target notes
TN 1
Unmanaged species poor intact hedgerow
on perimeter of field and adjacent leisure
centre. Woody species included ash
Fraxinus excelsior, hawthorn Crataegus
monogyna, blackthorn Prunus spinosa
and dog rose Rosa canina. Hedgerow
understorey included abundant common
nettle Urtica dioica and common bent
grass Agrostis capillaris with occasional
red campion Silene dioica, common
cleavers Galium aparine and bramble
Rubus fruticosus.
TN 2
Grassland habitat that had been recently
mown. Improved neutral grassland
habitat containing common species such
as perenial rye grass Lolium perenne,
meadow foxtail Alopecurus pratensis and
flowering species such as meadow
buttercup Ranunculus acris, daisy Bellis
perennis, white clover Trifolium repens,
ribwort plantain Plantago lanceolata and
scattered common dock Rumex acetosa.
TN 3
Hedgerow bank located on the field
boundary adjacent to the A494. Good
mixture of grasses and flowering plants
such as false oat grass Arrhenatherum
elatius, cocksfoot Dactylis glomerata,
common bent and Yorkshire fog Holcus
lanatus, meadow vetchling Lathyrus
pratensis, black knapweed Centaurea
nigra and meadow sweet Filipendula
ulmaria.
Natural Resources Wales Phase 1 Habitat Survey Report
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TN 4
Shallow running ditch along the field
boundary with adjacent rough
unmanaged buffer. Species included
hemlock water dropwort Oenanthe
crocata, water mint Mentha citrata,
monkeyflower Mimulus guttatus and
meadow sweet. Adjacent young hazel
Corylus avellana hedge located on the
field boundary next to the ditch.
TN 5
Row of mature trees on field boundary.
Most of the trees were ash with the
occasional beech Fagus sylvatica tree.
Some trees have suitability for roosting
bats which contained potential roosting
features (PRFs) such as cracks, knots and
hollows within trees that could be used as
bat roosts. Some trees covered in ivy,
which may obscure any further PRFs.
TN 6
Row of mature ash and beech trees with
PRFs on field boundary.
TN 7
Row of mature ash and beech trees with
PRFs on field boundary.
Natural Resources Wales Phase 1 Habitat Survey Report
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TN 8
Row of mature, ash, oak Quercus sp,
beech and sycamore Acer pseudoplatanus
trees with PRFs on field boundary.
TN 9
Improved neutral grassland habitat that
had been recently mown. Species
diversity of grassland low, containing
species such as perennial rye grass, white
clover and occasional meadow buttercup.
TN 10
Row of mature ash and oak trees on the
northern boundary of the field with PRFs.
TN 11
Intact species poor hedgerow with trees
on the boundary of the field. Good
mixture of woody species such as
hawthorn, hazel, blackthorn, elder
Sambucus nigra and dog rose. Within
hedgerow are semi mature ash trees.
Understorey of hedgerow containing
abundant nettle and common cleavers
with red campion.
Natural Resources Wales Phase 1 Habitat Survey Report
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TN 12
Improved neutral grassland habitat that
at time of survey was being grazed by
cattle. Scattered throughout field was
frequent creeping thistle Cirsium arvense.
TN 13
Grassland area currently being used as
meadow habitat. Grassland dominated
by Yorkshire fog and common bent
grasses. Mixed within the grassland was
occasional greater birdsfoot trefoil Lotus
pedunculatus.
TN 14
Improved neutral grassland habitat that is
currently being grazed by sheep. More
diversity of grasses in these fields
compared to others, including species
such as common bent, Yorkshire fog,
sweet vernal grass Anthoxanthum
odoratum, crested dogstail Cynosurus
cristatus and scattered creeping
buttercup.
TN 15
Wet flush within field containing
dominant soft rush Juncus effusus. Area
surrounded by improved neutral
grassland currently being grazed by
sheep.
Natural Resources Wales Phase 1 Habitat Survey Report
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TN 16
Species poor intact hedgerow separating
field. Hedgerow dominated by hawthorn.
TN 17
Row of mature ash and oak trees on the
northern boundary of field with PRFs.
TN 18
Large area of meadow habitat adjacent to
the river. Grasses such as Yorkshire fog
and common bent dominate the sward
with occasional greater birdsfoot trefoil.
TN 19
Small pond at time of survey was dry.
Vegetation dominated by common reed
Phragmites australis and reedmace Typha
latifolia. The remainder of the vegetation
contained bramble and dominant
common nettles.
Natural Resources Wales Phase 1 Habitat Survey Report
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TN 20
Recently mown grassland area adjacent
to the Natural Resources Wales office
proposed for a small satellite compound.
TN21
Area of grassland habitat adjacent to the
river. Grasses such as Yorkshire fog and
common bent dominate the sward with
occasional greater birdsfoot trefoil and
scattered meadow buttercup. Scattered
in the area was osier willow Salix
viminalis.
TN22
Area of grassland habitat on island
adjacent to the river. Sward dominated
by Yorkshire fog and common bent
grasses with occasional birdsfoot trefoil,
back knapweed and selfheal Prunella
vulgaris.
TN23
Large open area of managed grassland
habitat. Sward dominated by Yorkshire
fog and common bent grasses.
Natural Resources Wales Phase 1 Habitat Survey Report
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APPENDIX 2 – Phase 1 habitat plan
Dismantled
Railway
19
28 27
26
Stones24
2
Car Park
School
16
1
61
7
1
12
8
5
2
Football Club
6
4
1
Cae G
adlas
Cattle Market
6
16
Hous e
165.0m
164.8m
167.5m
PW
15 15A
59
Sinks
Playing Field
164.6m
27
12
16
1
59
Glannant
Council Yard
HEOL YR O RSAF (STATION ROAD)
29
4
13
14
1
15
Offices
LB
TCB
48
26 Posts
4
26
40
y Bala
Lodge
Fire
Tower
Posts
Motte
Ambulance Station
50
STRE
ET)
(MOUNT
Bro Er
yl
Maes y B
ronydd
15
Bank
24
2
42
79
69
1
Gorsedd Circle
17
32
19
1
9
A 494
PO
PontTrywerynor Pont
LÔN Y DOMEN (MOUNT LA)
HEOL Y DOMEN
PH
Hall
7
4
37
40
Issues
36
37
43
38
12
TCB
Pleasant View
Maes- y-dre
31
28
1
4
PH
ElSubSta
Ysgol Bueno Sant
HEOL ARENIG (A
RENIG STREET)
64
49
El Sub Sta
Station
10
1
11
2
1
CAMBRIAN TERR
STRYD YR EGLW YS
HEOL BERWYN
Rhiwdery n
164.7m
A 4212
53
Office
Tomen y Bala
1
7 t o 8
25
39
12
PC
Statue
47
53
70
49
PC
31
24
14
20
13
7
12
Rh iwlas
HEOL Y CASTELL (CASTLE STREET)
34
910
PW
21
7
3
30
23
Sta
13
TrywerynTerrace
10
7
Church
2
52
Plas yn Ddol1 t o
10
B 4391
El Sub
B 4391
15
Post
Ty Br yn
aly nPosts
Bowling Green
Playground
Drain
Castell Gronw
Pond
12
DW Merddwr
Ford
Sluice
Flood WaterSalmon
5
B 4391
Met Station
8
Spring
B 4391
Pen-y-bont
Weir
River Dee
Sloping masonry
Sloping masonry
Bryn Llysg
Weir
Pond
Afon Tryweryn
Sloping masonry
Track
Sloping masonry
B 4391
El Sub Sta Sloping masonry
Sewage Works
Sloping masonry
Cattle Grid
15
Motte and Bailey
Council Depot
Issues
Sloping masonry
Drain
DW
9
Steps
LB
B 4391
14
Mast
7
Bala Enterprise Park
13
DW
Sloping masonry
Parc Menter Bala
Scrap
Yard
16
B 439
1
Ty'n-y-gwrych
/ Afon Dyfrdwy
Bryn-yr- aber
Spring
Path (um)
Channel
Afon Tryweryn
FB
164.3m
Track
Sheep Pens
Merddwr
Pond
PW
117
23
6
25
97
Tel Ex
Car Park
1
2
Pen-y- bont
12
STRY D Y FRON
13
28
War Mem
l
Car Park
Glascoed
HEOL TEGID/TEGID STREET
89
River Dee
Blaen-y -Wawr
Path
(um)
Grug Awel
LB
163.8m
4
81
43
59
3
13
35
Llyn Tegid or Bala Lake
103
Caer Y nn
PW
8
B 4403
Cinema
23
Pol Sta
19
16
63
54
52
Parc Menter Bala
44
38
Ysgol B
ro Teg
id
Drain
50
72
5
17
6
HEOL Y DOMEN (M
OUNT STREET)Bank
1
3
Red L ion Farm
Path
Rhes dai Arenig
8
83
HEOL PENSARN/PENSARN ROAD
Path
(um)
32
Posts
TRE M-Y-
MAWNOG FACH
52
8
Town
52
93
6
TCB
LB
El Sub Sta
9
3
9
72
17
Gerddi
3
45
PC
165.0m
11
4
Pengwern
Hall
Leisure Centre
HEOL ARAN/ARAN STREET
Tawe
LB
Pont
Issues
SM
24
10 3
Hi rnant
Hotel
3
55
MAE S TEGID
58
6
10 7
B 4391
Bro Eryl
77
2
12
1165
Glannau
59
Plas yn A cre
/ Afon
Clwydfa
Station
11
1
6
2
9
YSTAD CAE BACH
82 31
Dyfrdwy)
Sub Sta
Ffordd y
y Bronydd
60
20
Path
1
TCB
Garage
Sewage Pumping
Glan Celyn
23
Depot
Cwm
22
Sinks
6
Mwnwgl-y-llyn
Garage
163.4m
71
15
25
30
Cottage
13
11
88
33
B 439
1
Plas Teg
164.3m
B 4403
Playing Field
16
46
34
3
Telos
44
12
164.3m
PW
21
Berwy nfa
Tegid
Bryn Brial lu
13
Maes y
Gerddi
43
18
B 4391
22
96
102
90
B 4391
4
Ffynnon
PH
92
19
70
18
25
76
1
6
Bryn MyfanwyStatue
7
21
10
HEOL PLASEY /P
LASEY STREET
1
24
Path (um)
64
66
23
Hamdden
PW
29
6
94
13
30
7
98
10
105
5
164.3m
31
18
35
1
Hall
5
9
A 494
25
6
FFRIDD
39
Bala Enterprise Park
HEOL ARENIG/ARENIG STREET
1
Pros Kairon
Y STRYD FAWR/HIGH STREET
12
Y PARCIAU
The Cottage
46
9
18
El
73
1
60
163.4m
LB
1
Canolfan Hamdden
Maes
Hall
ROMAN ROAD
65
Y BALA
Penllyn
40
68
46
2
4
11
1
5
Brenarth
Co ur t
Tyddyn Llwyn
Garth Bueno
ENCI L PENSA RN
Cys god y Coed
Hafod y Nant
Rhos lyn
16
Th e1to3
4to 7
LLAIN DEG
2
5
8
Cae Gadlas
Yr Hafan
9
7Llynor
6
Rhesdai'r P
las 1 to 3
Awel y L ly n
1
Posts
12a
26
9
10
4 Afal lon
18
2
2a
Pond
Track
CR
ED Bdy
CF
CR
Und
CC
CC
Und
ED Bdy
CR
ED Bdy
ED Bdy
CL
CR
Mast
Mast
PublicWaste DisposalSite
Ysgol-y-berwyn
5
6668
Pond
Stand
Track
Tanks
SM
Pond
Drain
Stabal
Bryn Y Groes
LletyR Wennol
Bythynnod
Yr Aran
1
6
Hall
Rhesdai'r B
erllan2
52
PH
3
1
5
6
4
ArenigRow
(Football Ground)
PH
Pavilion
Y STRYD FAWR / HIGH STREET
Rh an da i Pen llyn
1to6
14
1 23 4
5
6
7
8
9
10
11
12
13
14 15
16
17
18
1920
21
2322
292500
292500
293000
293000
293500
293500
3350
0033
5500
3360
00R:\
Projec
ts\1229
18_Lly
n_Tegi
d_De
sign_a
nd_P
lannin
g\8_W
orkspa
ces\2_
Issue_
Maps\
122918
-BVL-Z
0-00-D
R-I-00
007.mx
d ohr
81786
30/0
7/2019
Project:
Drawing title:
Drawing scale:
Drawing no.
Sheet size:
Revision
Client Drawing No. Revision
ClientDesigned by:
Rev Drawn Chkd Rvwd Apprvd Date Description
The limits, including the height and depths of the Works, shown inthis drawing are not to be taken as limiting the obligations of thecontractor under Contract.
Note:
0 40 80 120 160 200Metres
@ A3
P01
1:5,000
P1HS SURVEY
Date:ZO
© Copyright Black & Veatch Ltd. 2019
Reproduced by permission of Ordnance Survey on behalf of HMSO.© Crown copyright and database rights 2019. Ordnance Survey Licence number 100019741
SCALE
P01 ZO
1:5,000 A3
Print Version: Print Quality (300dpi @ A3)
JULY 2019
30/07/2019ES
LLYN TEGIDPLANNING AND DESIGN
SUITABLE FOR INFORMATION
122918-BVL-Z0-00-DR-I-00007
Contains OS data © Crown Copyright and database right 2019
LEGEND:SURVEY AREATARGET NOTEG2 RUNNING WATERJ2.1.2 INTACT HEDGE - SPECIES-POORJ2.3.2 HEDGE WITH TREES - SPECIES-POORJ2.4 FENCEJ2.5 WALLA1.1.1 BROADLEAVED WOODLAND -SEMI-NATURALA3.1 BROADLEAVEDPARKLAND/SCATTERED TREESB2.2 NEUTRAL GRASSLAND - SEMI-IMPROVEDB4 IMPROVED GRASSLANDB6 POOR SEMI-IMPROVEDGRASSLANDF2.2 MARGINAL AND INUNDATION -INUNDATION VEGETATIONG1 STANDING WATERJ4 BARE GROUND
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SAFETY, HEALTH AND ENVIRONMENTAL INFORMATIONIN ADDITION TO THE HAZARDS OR RISKS NORMALLY ASSOCIATEDWITH THE TYPES OF WORK DETAILED ON THIS DRAWING, THEFOLLOWING SIGNIFICANT RESIDUAL RISKS SHOULD BE NOTED.FURTHER DETAILS ARE INCLUDED IN THE CDM DESIGN RISKMANAGEMENT REGISTER
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CONSTRUCTION :
MAINTENANCE, CLEANING AND OPERATION :
DECOMMISSIONING OR DEMOLITION :
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