TableA.1: Implementation
Schedule for Construction and Operation of Wind Turbines, Offshore Substation
and Transmission Cable
|
EIA Ref. |
Environmental
Protection Measures |
Location/Duration
of Measures/Timing of Completion of Measures |
Implementation
Agent |
Implementation
Stage |
Relevant Legislation
& Guidelines |
|||
|
Des |
C |
Post-C |
O |
|||||
|
1. Water Quality |
||||||||
|
S
6.8 and EM&A Manual |
Implement water quality monitoring programme
prior and during construction phase for the following activities: • Dredging
works in the nearshore cable landing area (2,500m3
day-1); and, • Jetting
for cable installation (360m hr-1) |
Relevant
works areas / During Construction |
ET
|
|
ü |
|
|
- |
|
S
6.8 and Annex 6C |
Dredging
and jetting plant will be required to comply with the rates modelled in the
EIA report (S6 Annex) for the
various activities assessed. |
Dredged
areas / During Construction |
Contractor(s) |
|
ü |
|
|
- |
|
S
6.8 |
Silt
curtains will be deployed for dredging works at the seawall of the Lamma Extension Seawall to reduce the elevation of
suspended solids to nearby sensitive receivers. Details of silt curtain installation
should be proposed by the contractor prior to the commencement of
construction works and submitted to the IEC for approval. |
Dredged
areas at the landing point of the Lamma Extension
seawall/ During Construction |
Contractor(s) |
|
ü |
|
|
|
|
S
6.8 |
Dredged
marine mud will be disposed of in a gazetted marine disposal area in
accordance with the Dumping at Sea
Ordinance (DASO) permit
conditions. |
Dredged
areas / During Construction |
Contractor(s) |
|
ü |
|
|
Dumping at Sea Ordinance |
|
S
6.8 |
Closed
grab dredgers should be used to reduce the potential for leakage of sediments |
Dredged
areas/ During Construction |
Contractor(s) |
|
ü |
|
|
Dumping at Sea Ordinance |
|
S
6.8 |
Disposal
vessels will be fitted with tight bottom seals in order to prevent leakage of
material during transport. |
Dredged
areas/ During Construction |
Contractor(s) |
|
ü |
|
|
Dumping at Sea Ordinance |
|
S
6.8 |
Barges
will be filled to a level, which ensures that material does not spill over
during transport to the disposal site and that adequate freeboard is
maintained to ensure that the decks are not washed by wave action. |
Dredged
areas/ During Construction |
Contractor(s) |
|
ü |
|
|
Dumping at Sea Ordinance |
|
S
6.8 |
After
dredging, any excess materials will be cleaned from decks and exposed
fittings before the vessel is moved from the dredging area. |
Dredged
areas/ During Construction |
|
|
ü |
|
|
Dumping at Sea Ordinance |
|
S
6.8 |
When the dredged
material has been unloaded at the disposal areas, remove any material that
has accumulated on the deck or other exposed parts of the vessel and place in
the hold or a hopper. Do not wash
decks clean in a way that permits material to be released overboard. |
Dredged
areas/ During Construction |
Contractor(s) |
|
ü |
|
|
Dumping at Sea Ordinance |
|
S
6.8 |
The
Contractor(s) will ensure that the works cause no visible foam, oil, grease,
litter or other objectionable matter to be present in the water within and
adjacent to the area of marine works. |
Dredged
areas/ During Construction |
Contractor(s) |
|
ü |
|
|
- |
|
S
6.8 |
Control
and monitoring systems will be used to alert the crew to leaks or any other
potential risks. |
Dredged
areas/ During Construction |
Contractor(s) |
|
ü |
|
|
- |
|
S
6.8 |
All plant will be fully serviced and
inspected before use to limit any potential discharges to the marine
environment |
Quayside
/ During Construction |
Contractor(s) |
|
ü |
|
|
- |
|
S
6.8 |
Avoid spillage of oil, fuel and chemicals
from structures by adopting appropriate good site practices |
Wind
farm area / During Construction |
Contractor(s) |
|
ü |
|
|
Code of Practice on the Packaging, Labelling and
Storage of Chemical Wastes |
|
S
6.8 |
Any
grout used would conform to the relevant environmental standards. In addition, the adoption of
appropriate operational management by the contractor should lead to low
potential for leakage during the pumping phase. |
Wind
farm area / During Construction |
Contractor(s) |
|
ü |
|
|
- |
|
S
6.8 |
No debris shall be willingly
discharged to sea. However, should debris be placed on the seabed,
this will be removed (wherever practicable) |
Wind
farm area / During Construction |
Contractor(s) |
|
ü |
|
|
- |
|
S
6.8 |
Construction
site runoff at the Laydown area should be prevented
or minimised in accordance with the guidelines stipulated in the EPD's Practice Note for Professional Persons,
Construction Site Drainage (ProPECC PN 1/94). |
Land
Site / During Construction |
Contractor(s) |
|
ü |
|
|
ProPECC PN 1/94 |
|
S
6.8 |
The permanent storage areas of oil
fuel and chemical will be surrounded by bunds or other containment device to prevent
spilled oil, fuel and chemicals from reaching the receiving waters |
Land
Site / During Construction |
Contractor(s) |
|
ü |
|
|
Code of Practice
on the Packaging, Labelling and Storage of Chemical Wastes |
|
S
6.8 |
The Contractors will prepare
guidelines and procedures for immediate clean-up actions following any
spillages of oil, fuel or chemicals |
Land
Site / During Construction |
Contractor(s) |
|
ü |
|
|
- |
|
S
6.8 |
Surface run-off from bunded areas will pass through oil/water separators prior
to discharge to the stormwater system |
Land
Site / During Construction |
Contractor(s) |
|
ü |
|
|
ProPECC PN 1/94 |
|
2. Waste Management |
|
|
|
|
|
|
|
|
|
S
7.6 |
The Contractor shall prepare and
implement a Waste Management Plan which incorporates site-specific factors,
such as the designation of areas for the segregation and temporary storage of
reusable and recyclable materials. |
Contract
mobilisation / During Construction |
Contractor(s) |
|
ü |
|
|
- |
|
S
7.6 |
The Contractor shall ensure only
licensed waste collectors are used to collect chemical waste for delivery to
a licensed treatment facility |
Contract
mobilisation / During Construction |
Contractor(s) |
|
ü |
|
|
Waste Disposal
(Chemical Waste) (General) Regulation Code of Practice
on the Packaging, Labelling and Storage of Chemical Wastes |
|
S
7.6 |
The Contractor shall apply for and
obtain the appropriate licenses/permits for the disposal public fill and
chemical waste. |
Contract
mobilisation / During Construction |
Contractor(s) |
|
ü |
|
|
Waste Disposal
(Chemical Waste) (General) Regulation Code of Practice on the Packaging, Labelling and Storage
of Chemical Wastes Waste Disposal (Charges for Disposal of Construction
Waste) Regulation |
|
S 7.6 |
Separation of
chemical wastes for special storage and handling and appropriate treatment in
accordance with the Code of Practice on the Packaging, Labelling and Storage
of Chemical Wastes |
Land
Site / During Construction |
Contractor(s) |
|
ü |
|
|
Code of Practice
on the Packaging, Labelling and Storage of Chemical Wastes |
|
S7.6 |
A record system for the amount of
wastes generated / recycled and disposal sites. |
Land
Site / During Construction |
Contractor(s) |
|
ü |
|
|
- |
|
S
7.6 |
All excavated materials shall be
reused on site to the extent practical. |
Land
Site / During Construction |
Contractor(s) |
|
ü |
|
|
- |
|
S
7.6 |
Dredged marine mud shall be
disposed of in a gazetted marine disposal ground under the requirements of
the Dumping at Seas Ordinance. Marine
mud shall be assessed in accordance with the ETWBTC No. 34/2002 prior to the
dredging to identify the suitable disposal ground. |
Dredging
/ During Construction |
Contractor(s) |
|
ü |
|
|
Dumping
at Sea Ordinance ETWBTC
No. 34/2002, Management of Dredged/Excavated Sediment; Environment, Transport
and Works Bureau, |
|
S
7.6 |
EM&A of waste handling,
storage, transportation, disposal procedures and documentation through the
site audit programme shall be undertaken. |
All
facilities / During Construction |
ET |
|
ü |
|
|
- |
|
3. Terrestrial Ecology |
||||||||
|
S 8.13.2 |
Although
no adverse residual impacts are envisaged based on the results of impact
assessment. Monitoring for bird abundance and distribution will be undertaken
for one year during the pre-construction phase, one year during the
construction phase for the wind turbines and the first year of the operation
of the turbines. |
Wind
Farm/ Pre-Construction, During Operation and First year of Operation |
ET |
ü |
ü |
|
ü |
- |
|
4. Marine Ecology |
||||||||
|
S
9.12.2 |
The vessel
operators will be required to control
and manage all effluent from vessels. |
During
Construction / Marine works |
Contractor(s) |
|
ü |
|
|
- |
|
S
9.12.2 |
A policy of no dumping of rubbish, food, oil, or
chemicals will be strictly enforced.
This will also be covered in the contractor briefings. |
During
Construction / Marine works |
Contractor(s) |
|
ü |
|
|
- |
|
S
9.12.2 |
Vessel operators working on the Project construction
or operation will be given a briefing, alerting them to the possible presence
of marine mammals in the area, and guidelines for safe vessel operations in
the presence of cetaceans. If
high speed vessels are used, they will be required to slow to 10 knots when
passing through a high density dolphin area. |
During
Construction / Marine works |
ET
& Contractor(s) |
|
ü |
|
|
- |
|
S
9.12.2 |
The
vessel operators will be required to use predefined and regular routes, as
these will become known to porpoise using these waters. This measure will
further serve to minimise disturbance to marine mammals due to vessel
movements |
During
Construction / Marine works |
ET
& Contractor(s) |
|
ü |
|
|
- |
|
S
9.12.3 |
A pre-construction dive survey will be undertaken at
the sites where isolated corals were identified along the cable route to
confirm their existence. Should
these corals be found present, mitigation will be applied, such as potential
relocation away from the proposed area of works |
Pre-Construction |
ET
& Contractor(s) |
ü |
|
|
|
|
|
S
9.12.4 |
To reduce underwater sound levels associated with
percussive piling, the following steps will be taken: -
Quieter hydraulic hammers should
be used instead of the noisier diesel hammers; -
Acoustic decoupling of noisy
equipment on work barges should be undertaken. |
During
Construction / Marine works |
Contractor(s) |
|
ü |
|
|
- |
|
S 9.12.4 |
Best practices are recommended to
reduce the impacts to marine mammals: -
Instigate ‘ramping-up’ of the
piling hammer to provide an advance warning system to marine mammals in the
vicinity; -
Activities will be continuous without
short-breaks and avoiding sudden random loud sound emissions |
During
Percussive Piling works for Foundation Construction |
Contractor(s) |
|
ü |
|
|
- |
|
S 9.12.4 |
No
piling works for the wind turbines will be conducted during the finless porpoise
peak seasons between December and May. |
During
Percussive Piling works for Foundation Construction |
Contractor(s) |
|
ü |
|
|
|
|
S
9.12.4 |
An exclusion zone of 500 m radius will be scanned around the work
area for at least 30 minutes prior to the start of percussive piling
works. For dredging works, an
exclusion zone of 250m radius shall apply. If marine mammals/green turtles are
observed in the exclusion zone, piling will be delayed until they have left
the area. |
During
Percussive Piling works for Foundation Construction / Dredging Works for
Cable Installation |
ET |
|
ü |
|
|
|
|
S
9.15.1 |
Marine
percussive piling works to be restricted to a daily maximum of 12 hours within
daylight operations. |
During
Percussive Piling works for Foundation Construction |
Contractor(s) |
|
ü |
|
|
|
|
S
9.15.1 |
Long-term
monitoring will be conducted for the distribution and abundance of marine mammals
during the construction and post-construction phase of the project. Baseline marine mammal monitoring will
also be conducted. Monitoring
will include: • Vessel
based surveys • Passive
acoustic monitoring • Land-based
theodolite tracking The
protocols for this will be agreed with AFCD in advance. |
Major
marine works areas / Pre-construction, during construction and
post-construction |
ET |
ü |
ü |
ü |
|
|
|
5. Fisheries |
||||||||
|
S
10.7 |
The
impacts to fisheries resources will be minimised by adopting the following
measures: -
The use of competent and
experienced contractors and vessels operators; -
Good planning of the installation
sequence to avoid possible clashes; -
Good promulgation of information
relating to construction activities; -
Thorough auditing of all vessels; -
Observing good industry
construction practices by the Contractors; and, -
Surveying of the ‘as-laid’ cable
positions and having good quality position fixing/surveying systems available |
Marine
Works / During Construction |
Contractor(s)
|
|
ü |
|
|
- |
|
S
10.7 |
Inform fishermen of possible developments of
the Project in advance |
Marine
Works / During Construction |
Contractor(s)
/ Operator |
|
ü |
|
|
- |
|
S
10.7 |
Using good engineering practice, including the use of appropriately
sized piles (smaller piles generate lower levels of underwater sound) and
piling equipment. |
Marine
Works / During Construction |
Contractor(s)
|
ü |
ü |
|
|
- |
|
S
10.7 |
Using ramp-up piling procedures. Blow frequency during this ramping up
period should replicate the intensity that would be undertaken during full
piling (e.g. one blow every two seconds) to provide cues for fish to localize
the sound source. Pile blow
energy should be ramped up gradually over the ‘soft start’ period. |
Marine
Works / During Construction |
Contractor(s)
|
|
ü |
|
|
- |
|
S
10.7 |
A
geometric layout design should been adopted to eases navigation between structures
and reduces collision risk in times of low visibility. |
Wind
Farm / During Detailed Design
|
Contractor(s) |
|
ü |
|
|
- |
|
S
10.7 |
The
relevant authorities will be notified of activities in the wind farm area during
construction activities, including dates of any works. In addition, the Marine Department
will be notified of the final location of the wind farm structures so that
these can be updated on marine charts.
|
Marine
Works / During Construction |
Contractor(s)
|
|
ü |
|
|
- |
|
S
10.7 |
All
vessels engaged in construction activities will be equipped with a Maritime
VHF radio and an agreed frequency channel maintained. All vessels involved in
the construction works will show the correct lights and shapes and ensure
that all movements are promulgated through the Marine Department |
Marine
Works / During Construction |
Contractor(s)
|
|
ü |
|
|
- |
|
S
10.7 |
Consider
the use of Guard Ship during the construction phase, particularly in periods
of high activity. |
Marine
Works / During Construction |
Contractor(s)
|
|
ü |
|
|
- |
|
S
10.7 |
A
safety / exclusion zone of 500 m from any area of construction works will be
established for all non-Project vessels.
The working area will be marked in accordance with Marine Department
Notice No. 23 (2009). |
Marine
Works / During Construction |
Contractor(s)
|
|
ü |
|
|
- |
|
S
10.7 |
Temporary
lighting should be provided for incomplete structures during construction |
Marine
Works / During Construction |
Contractor(s)
|
|
ü |
|
|
- |
|
S
10.7 |
The
wind farm should be marked according to the requirements of the Marine
Department. The precise marking
arrangement will be agreed during the Detailed Design Phase. |
Ward
Farm / Detail Design |
Designer |
ü |
|
|
|
|
|
S
10.7 |
The
markings of wind turbines will need to be maintained at all times and should
failure occur, the Marine Department should be notified immediately and
repairs undertaken as soon as possible. |
Wind
Farm / Operation |
Operator
|
|
|
|
ü |
- |
|
6. Landscape and Visual |
||||||||
|
S
11.6 |
All
plant materials affected by the works relating to the submarine cable landing
are to be replaced with new plantings to match the existing situation. All
planting of trees and shrubs is to be carried out in accordance with the
relevant best practice guidelines. Plant densities are to be provided in
future Detailed Design documents and are to be selected so as to achieve a
finished landscape that matches the surrounding, undisturbed, equivalent
landscape types. |
Land
site / Pre-Construction (Detail Design) |
Designer
|
ü |
|
|
|
- |
|
S
11.6 |
Established
trees of value to be re-located where practically feasible. |
Land
site / Pre-Construction (Detail Design) |
Contractor(s) |
|
ü |
|
|
|
|
S
11.6 |
Site
hoardings to be compatible with the surrounding environment. Where possible, site hoardings should
be colored to complement the surrounding areas |
Land
site / During Construction |
Contractor(s) |
ü |
ü |
|
|
|
|
S
11.6 |
Landscape
resources affected by the onshore cable trench are to be reinstated to match
existing conditions. |
Land
site / Post- Construction |
Contractor(s) |
|
ü |
|
|
|
|
S
11.7 |
The
layout of the wind farm array shall be designed to reduce the number of
turbines visible for the most sensitive viewpoints |
Wind
Farm/ Detail Design |
Designer
|
ü |
|
|
|
- |
|
S
11.7 |
Appropriate
colours for the wind turbines should be selected to
reduce their visibility |
Wind
Farm/ Detail Design |
Designer
|
ü |
|
|
|
- |
|
S
11.7 |
The
blades for all turbines should rotate in the same direction to create a more
harmonious visual pattern |
Ward
Farm / Detail Design / Operation |
Designer
/ ET |
ü |
ü |
|
|
- |
|
7. Cultural Heritage |
||||||||
|
S
12.8 |
To
verify the avoidance of direct impact to the shipwreck identified during the
geophysical survey, the Environmental Team and the Independent Environmental
Checker will be required to monitor the installation of turbines and
submarine cable during the construction stage. |
Detail
Design / Construction |
ET/IEC |
ü |
ü |
|
|
- |