Appendix
C - Implementation Schedule of Environmental Mitigation Measures (EMIS)
Air Quality – Schedule of Recommended Mitigation Measures
Impact |
Mitigation Measures |
Timing |
Implementation Status |
Air Quality during
construction |
Restricting
heights from which materials are dropped, as far as practicable to
minimize the fugitive dust arising from unloading/loading. |
During construction |
V |
All stockpiles of excavated materials or spoil of more than 50m3 shall be enclosed, covered or dampened during dry or windy conditions. |
@ |
||
Effective water
sprays shall be used to control potential dust emission sources such as unpaved haul roads and active construction areas. |
V |
||
All spraying of materials and surfaces shall avoid excessive water
usage. |
V |
||
Vehicles that have the potential to create dust while transporting materials shall be
covered, with the cover properly
secured and extended over the edges of the
side and tail boards. |
V |
||
Materials shall be dampened, if necessary, before transportation. |
V |
||
Travelling speeds
shall be controlled to reduce traffic induced dust dispersion and re-suspension within the site from the
operating haul trucks. |
V |
||
Vehicle washing facilities shall be provided to minimize the quantity of material deposited on public roads. |
V |
Noise – Schedule of Recommended Mitigation Measures
Impact |
Mitigation Measures |
Timing |
Implementation Status |
Noise during
construction |
Use of silenced plant or plant equipped with mufflers or dampers in substitute of ordinary plant. |
During construction |
V |
Reduce the number of equipment and their percentage on-time. |
V |
||
3.5
m and 5.5
m high temporary noise barrier at culvert construction work area (Figure 2a of
the Environmental Permit). |
V* |
||
3 m high temporary noise barrier along the northern edge of Bridge 12 at ground
level (Figure 2b
of the Environmental Permit). |
V* |
||
2
m high temporary noise barrier along the northern edge of Bridge 12 at bridge level (Figure 2b of the Environmental Permit). |
V* |
||
2.5
m high temporary noise barrier along Tai Wo Service Road
West (Figure 2c of
the Environmental Permit). |
V* |
||
3.5m and 7m high temporary noise barrier along Tai Wo Services Road
West near Tai Hang (Figure 2c of
the Environmental Permit). |
V* |
||
7
m high temporary noise barrier along Tai Wo Service Road West near Tai Wo Footbridge work area (Figure 2d of
the
Environmental Permit). |
V* |
||
7
m high temporary noise barrier near Kiu Tau Footbridge work area (Figure 2d of the
Environmental Permit). |
V* |
||
2.5
m high temporary noise barrier near
river diversion work area (Figure 2e
of the Environmental Permit). |
V* |
||
Noise
during operation |
Various type of barriers of varying
heights as shown in Figures 4a to 4e – Layout of Noise Barriers of the
Environmental Permit |
Review
of required noise barrier layout during the design stage |
V* |
* Permanent noise
barriers have been erected.
Water Quality – Schedule of Recommended Mitigation Measures
Impact |
Mitigation Measures |
Timing |
Implementation Status |
Water quality during construction |
Demolition and reconstruction of bridges - Prevent off-site migration through
use of sheet piles. - Minimise duration of works as far as practical. -
All sewer and drainage connections should be sealed to prevent debris, soil,
sand, etc, from entering public sewers/drains. - Site surface runoff should be settled to remove
sand/silt before it
is discharged into the existing storm drains. |
During construction |
V |
Road Widening Works, Earthworks and Culvert Extension Works -
Wastewater generated from
any
concrete batching washdown of equipment or similar activities should be discharged
into foul sewers, after the removal of
settable solids, and pH adjustment as necessary. All sewage discharges
from the
study area
should meet the TM standards and approval from EPD through the
licensing process is
required. -
Sand traps, oil interceptors and other pollution prevention installations should
be provided, properly cleaned and maintained. -
Runoff from exposed
working areas, unfinished slopes
and
from
unlined temporary channels should be directed to
stilling basins and/or silt traps before discharging to the
drainage outfalls. -
Regular inspections of stilling basins and/or silt traps are required to ensure that sediment is
not conveyed into the existing drainage system. - Open stockpiles should be covered with a tarpaulin cover. - During the wet season, any exposed top soils should be covered with a
tarpaulin, shotcreted or hydroseeded. - Sand and silt from wash-water
from vehicle washing should be settled out before discharging into storm drains. - Fuels should be stored in bunded areas such that spillage can be easily collected. |
V |
Waste – Schedule of Recommended Mitigation Measures
Impact |
Mitigation Measures |
Timing |
Implementation Status |
Waste
management during construction |
General Waste - Transport of wastes off
site as soon as possible. - Maintenance of accurate waste records. - Minimisation of waste generation for disposal (via reduction/recycling/re-use). - No on-site burning will be permitted. - Use of re-useable metal hoardings/signboards. |
During construction |
V |
Vegetation from
site clearance - Segregation of materials to facilitate disposal. - Mulching to reduce bulk and where possible
review opportunities for the possible beneficial use within landscaping
areas. |
V |
||
Demolition Wastes -
Segregation of
materials to
facilitate disposal. -
Appropriate stockpile management. |
V |
||
Excavated Materials -
Segregation
of materials to facilitate disposal / reuse. -
Appropriate
stockpile management. -
Re-use
of excavated material on or off site (where possible). -
Special
handling and disposal procedures in the event that contaminated materials are
excavated. |
V |
||
Construction Wastes - Segregation of materials to facilitate
recycling/reuse (within designated area in appropriate
containers/stockpiles). - Appropriate stockpile management. - Planning to reduce over ordering and waste
generation. - Recycling and re-use of materials where possible
(e.g. metal, wood from formwork) - For material which cannot be re-used/recycled,
collection should be carried out by an approved waste contractor for landfill
disposal. |
@ |
||
Bentonite Slurries - Bentonite slurries should be reused as far as possible. - Disposal in accordance
with Practice Note
For Professional Persons ProPECC
PN 1/94. |
# |
||
Chemical Wastes - Storage within locked, covered and bunded area. - The
storage area shall not be located adjacent to sensitive receivers e.g. drains. - Minimise waste production and recycle oils/solvents
where possible. - A spill response procedure shall be in place and
absorption material available for minor spillages. - Use appropriate and labelled containers. - Educate site workers on site cleanliness/waste
management procedures. - If chemical wastes are to be generated, the
contractor must register with EPD as
a chemical waste producer. - The chemical wastes
shall be collected
by a licensed
chemical waste collector. |
V |
||
Municipal Wastes - Waste shall
be stored within
a temporary refuse
collection facility, in appropriate containers prior to collection
and disposal. - Regular, daily collections are required by an
approved waste collector. |
V |
Ecology – Schedule of Recommended Mitigation Measures
Impact |
Mitigation Measures |
Timing |
Implementation Status |
Ecology during
construction |
Accurate Delineation of Works Area - Boundaries of proposed works areas shall be clearly identified and separated from
external areas by a physical barrier to prevent encroachment of adjacent habitats. - Individual trees which fall within the works
areas but which work plans do not require removal are to be retained and
fenced off to maximize protection. |
During construction |
V |
Vegetation Clearance - No fires shall be lit within the works area for
the purpose of burning cleared vegetation. - The Contractor shall give consideration to mulching the cleared vegetation for recycling within the works area / adjacent land. |
V |
||
Dust generation There are a number of measures which shall be taken as specified in the Air Pollution Control (Construction Dust) Regulation on ‘Dust Control Requirements, including the following key measures to be applied during construction: - Vehicle washing facilities to be provided at every
discernible or designated vehicle exit point; - All temporary site access roads shall be sprayed
with water to suppress dust as necessary; - All dusty materials should be sprayed with water
immediately prior to any handling; and - All debris should be covered entirely by impervious
sheeting or stored in a sheltered debris collection area. |
V |
||
Surface Run-off In general, mitigation measures shall be in accordance with ProPECC PN1/94 on ‘Construction Site Drainage’. Key measures include: - Bund and cover stock piles to avoid run-off; - Channel any run-off through a system of oil,
grease and sediment / silt traps and reuse water on site where ever practical; - All vehicle maintenance to be undertaken within
a bunded area; and - Maximise vegetation retention on-site to
maximise absorption (minimise transport). |
V |
Landscape and Visual Impact – Schedule of Recommended Mitigation Measures
Impact |
Mitigation Measures |
Timing |
Responsibility |
|
Landscape &
Visual
during construction |
Preservation of
Existing Vegetation - Trees identified for retention within the
project limit would be protected during the works; - The tree transplanting and planting works shall
be implemented by approved Landscape
Contractors. |
During construction |
V |
|
Temporary Works Areas - Where feasible
the works areas would be screened using hoarding and existing vegetation would
be retained where possible to reduce the landscape and visual impacts arising
from the construction activity. The landscape of these works areas would be
restored following the completion of the construction phase. |
V |
|||
Hoarding - A hoarding would be erected where practicable in
the most visually sensitive locations to screen the temporary construction
works from the local VSRs. |
V |
|||
Top Soils - The works
will result in disturbance to extensive areas of topsoil. Topsoil worthy of
retention should be stockpiled for use following completion of the civil engineering
works. It should either be temporarily vegetated with hydroseeded grass or
turned over on a regular basis. |
||||
# |
||||
Protection of
Important Landscape Features - Important features such as temples, Island House
and kilns within the study area, although remote from the proposed works retained
and adequately protected. |
V |
Legend:
V = implemented;
x = not implemented;
@ = partially
implemented;
+ = recommended and
immediately implemented during the site inspection by the Contractor;
N/A = not applicable -
No such work was undertaken or no such material was used on site;
# = to be implemented.