Table 12.1 Summary Table for Site Activities, Potential
Environmental Impacts and Recommended Mitigation Measures in the Coming Months
|
Contract
No. |
Major Site Activities (July to September
2022) |
Location/ Working Period |
Potential Environmental Impact |
Recommended Mitigation Measures |
|
ND/2019/01 |
(a)
Site
clearance |
Portions 1a, 1b, 1c, 1e, 2, 3, 5, 6a, 7, 9b |
- Construction Dust impact - Noise Impact (Construction Phase) - Water Quality Impact (Construction
Phase) - Waste Management (Construction Waste) |
Air -
Watering
on exposed earth and haul road. -
Cover the
stockpiles or dusty materials. -
Deploy
water bowsers to water the haul road. -
Deploy
mist-cannon on site -
Provide
shelter with top and 3-sides for cement production activities. -
Entirely
cover the Arsenic-containing soil. -
Store the
bulk cement in enclosed silo tank for soil treatment. -
Close the
mechanical cover of the vehicles used for transporting dusty materials. -
Establish
vehicle wheel washing facilities at vehicle exit points. -
Speed
control of site vehicles. -
Erect
solid dull green hoarding. Noise -
Regular
inspect of construction plants in good condition. -
Provide
temporary noise screens if necessary. -
Use of
Quiet plants (QPME) and working methods if possible. -
Sequencing
operation of construction plants where practicable. -
Shut down
the machines and plant if not in use. -
Only
well-maintained plant to be operated on-site -
Mobile
plant to be sited as far away from NSRs as possible practicable. -
Conduct
noise monitoring regularly. -
Erect
silent-up noise barrier at portion 6b. Water -
Set up
wastewater treatment system (AquaSed) on site -
Erect
soil bund / temporary drain to divert /collect surface runoff. -
Maintain
the drainage and wastewater treatment facilities. Waste / Chemical Management -
Sort out
demolition debris and excavated materials from demolition works to recover
reusable / recyclable portions -
Provide
recycling bins on site,
encourage reuse and recycle as much as possible. -
Provide
drip trays for
chemical containers. -
Chemical spill kit available on site. -
Chemical waste cabinet available on site. -
Chemical wastes to be stored in appropriate
containers and collected by a licensed chemical waste collector. -
Delivery of yard waste to tree shredding facility
for upcycling. |
|
(b)
GI works |
Portions 1b, 9b |
|||
|
(c)
Excavation |
Portions 1b, 3,
5, 6a, 7, 8b, 9b, 9c, 10a, 10b |
|||
|
(d) Construction of retaining wall |
Portions 6a, 8a,
9b |
|||
|
(e)
Site
Formation |
Portions 2 |
|||
|
(f)
Demolition
of existing structure |
Portions 1a, 1c |
|||
|
(g)
Construction
of temporary site haul road |
Portions 2, 5,
10a |
|||
|
(h)
Operation
of HAC treatment facility |
Portions 6b |
|||
|
Drainage Works |
Portions 1b, 5, 6a, 7,
8a, 9b, 10a, 10b, 11b |
|||
|
(i)
Grouting |
Portion 8b |
|||
|
(j)
Construction of reservoir |
Portion 8a |
|||
|
(k)
Sheet piling / ELS |
Portions 1b, 5, 6a, 7,
8b, 9b, 10a, 10b |
|||
|
|
|
|||
|
ND/2019/02 |
(a)
Pipe
Jacking |
Portions 1 & 3 |
Air,
Noise, Waste |
-
Dusty
works should be spray water. Idle stockpile or slop should be covered by
Tarpaulin sheet properly. -
Wheel
washing should be carried out at every exit. -
Plants
should be well maintained to prevent dark smoke and oil leakage. Idle plant
should be turned off. -
Drip
tray should be provided for all chemical and stationary plants. -
No
construction works shall be carried out in restricted hours (7:00 pm to 7:00
am) unless CNP is obtained. -
Waste
should be sorted and dispose according to the Waste Management Plan -
No
direct discharge of wastewater into storm drains is allowed. Wastewater must
be de-silted before discharged in accordance with the water discharge
license. -
Dull
green barrier and ecological measures should be implemented according to the
Ecological protection plan. |
|
(b)
Backfilling |
Portion 3 |
Air,
Noise, Waste |
||
|
(c)
Concreting |
Portions 3, 9 & 10 |
Air,
Noise, Water, Waste, Ecology |
||
|
(d)
Bedding
& Pipe Laying |
Portion 3 |
Air,
Noise, Water, Waste, Ecology |
||
|
(e)
ELS |
Portions 3 & 7 |
Air,
Noise, Water, Waste, Ecology |
||
|
(f)
Sheet
Pile Installation |
Portions 3, 4 & 7 |
Air,
Noise, Water, Waste |
||
|
(g)
Cut and
Fill of Slope |
Portion 7 |
Air,
Noise, Water, Waste |
||
|
ND/2019/03 |
(a)
Excavation
& ELS |
Portion 1, 1a, 2, 3, 4, 4a, 4b, 5, 5a |
-
Waste -
Air
pollution -
Noise
pollution |
-
Dusty works should be sprayed with water or
stockpile should be covered by Tarpaulin properly. -
Plants should have maintenance to prevent dark
smoke and oil leakage. Idle plant should be turned off. -
Drip tray should be provided for all chemical and
stationary plants. -
No construction works shall be carried out in
restricted hours (7:00 pm to 7:00 am) unless CNP is granted. -
Waste should be sorted and disposed according to
Waste Management Plan. -
No direct discharge of wastewater in storm water
drainage is allowed. Wastewater must be desilted before discharging according
to water discharge license. |
|
(b)
Site
Clearance |
Sections 7, 8 and 9 |
-
Waste -
Air
pollution -
Noise
pollution |
||
|
(c)
Tree
Felling |
Sections 6, 7, 8 and 9 |
-
Waste -
Air
pollution -
Noise
pollution |
||
|
ND/2019/04 |
(a)
Sheet
piling |
Bridge
A2, A3, Portion K |
-
Air, Noise,
Waste |
-
Dusty works should be sprayed with water or
stockpile should be covered by tarpaulin properly. -
Plants should have maintenance to prevent dark
smoke and oil leakage. Idle plant should be turned off. -
Drip tray should be provided for all chemical and
stationary plants. -
No construction works shall be carried out in
restricted hours (7:00 pm to 7:00 am) unless CNP is granted. -
Waste should be sorted and disposed according to
Waste Management Plan. -
No direct discharge of wastewater into storm
water drains is allowed. Wastewater must be desilted before discharging
according to water discharge license. |
|
(b)
Bored
piling |
Bridge A1, A2, A3 |
-
Air,
Noise, Water, Waste |
||
|
(c)
Predrill |
Bridge A3, Portion K |
-
Air,
Noise, Water, Waste |
||
|
(d)
Excavation
& ELS |
Portion
H, Bridge
A2, A3 |
-
Air,
Noise, Waste |
||
|
(e)
Site
clearance |
Portion K |
-
Air,
Noise, Waste |
||
|
(f)
Tree felling |
Portion Q, R |
-
Air,
Noise, Waste |
||
|
ND/2019/05 |
(a)
Pre-drilling for bored
piles |
B1 &
B2(Portion II), C1(Portion II) & C1 03 |
-
Construction
Dust Impact -
Noise
Impact -
Water
Quality Impact (Construction Phase) -
Waste
Management (Construction Waste) -
Landscape
and Visual -
Cultural
Heritage |
-
Regular watering on exposed worksites and haul
road. -
Stockpiling area should be provided with covers
and water spraying system. -
Only well maintained plant to be operated on
site. -
plant known to emit noise strongly in one
direction, where possible, be orientated so that the noise is directed away
from nearby -
NSRs. -
mobile plant to be sited as far away from NSRs as possible practicable. -
All open stockpiles of construction materials of
more than 50m3 to be cove red with tarpaulin. -
Manholes to be adequately covered and temporarily
sealed so as to prevent silt, construction materials or debris being washed
into -
the drainage system. -
All vehicles and plant to be cleaned before
leaving a construction site to ensure no earth, mud, debris and the like is
deposited by -
them on roads. -
Segregate and store different types of waste in
different containers, skip or stockpiles to enhance reuse or recycling of
materials -
and their proper disposal. -
Sort out demolition debris and excavated
materials from demolition works to recover reusable/recyclable portions. -
Provide training to workers on appropriate waste
management procedures, including waste reduction, reuse and recycling. -
To adopt other good site practice, such as
arrangements for collection and effective disposal to an appropriate
facility, of all wastes -
generated at the site and regular cleaning and maintenance programme
for drainage. -
Chemical wastes to be stored in appropriate
containers and collected by a licensed chemical waste Contractor. Chemical
wastes -
(e.g. spent lubricant oil) should be recycled at
an appropriate facility as far as possible, while the chemical waste that
cannot be -
recycled should be disposed of at either the
Chemical Waste Treatment Centre, or another licensed facility, in accordance
with the -
Waste Disposal (Chemical Waste) (General)
Regulation. -
Conducting Construction Vibration Monitoring -
Tree Protection & Preservation Exiting trees
to be retained within the Project Site should be carefully protected during
construction. -
In particular OVTs will be preserved according to
ETWB Technical Circular (Works) No. 29/2004. -
Tree Transplantation Trees unavoidably affected
by the Project works should be transplanted where practical. Trees should be -
transplanted straight to their final receptor site and not held in a temporary
nursery as far as possible. -
Erect 2m high dull green site boundary fence. |
|
(b)
Bored piling |
B1(Portion I),
B1&B2(Portion II), C1(Portion
II), C1 02b, C1 03, C2 02, C2 03a, C2
03b, C3 02, C3 03a, C3 04a, D2 01, E2
01. |
|||
|
(c)
Pile Piling |
D2 03 |
|||
|
(d)
Interface Coring works |
D2-02 , B1 01
P8, B1 02b P2, C1 04a P1, C2 01
P5, C2 02 P1, C2 02 P3 & C2 02
P6 |
|||
|
(e)
ELS & Pile Cap Construction |
C1-04, C3 04b,
D1 01, D1 02, D1 03, D1 04, E1
01, E1 02, E1 03 & E1 04 E2 03, E3 01, E3 03,
D2 02 |
|||
|
(f)
Bailey bridge
construction & Portal Beam |
C4-01 |
|||
|
(g)
Footing
construction |
C4-02 |
|||
|
(h)
Utilities
Diversion/construction Works and Permanent Road Works |
Venton Area Portion 1 1,
Portion 13, Portion 17 and
18 |
|||
|
(i)
Pier /
Column Construction |
C3-03b, C4 03,
C4 04aM, C4 04bM, D1 01, E1 01,
E1 02, E1 03 & E1 04 |
|||
|
(j)
Haul road construction |
B2-03 to C1
02a at Portion II |
|||
|
(k)
Launching Girder & Form Traveler Fabrication |
CTC Storage Yard |
|||
|
(l)
Slope works |
RW06, FS04 |
|||
|
(m)
Demolition |
HD Warehouse |
|||
|
ND/2019/06 |
Site clearance |
Portions 4, 5 |
N/A |
N/A |
|
ND/2019/07 |
(a)
Site Clearnace |
Portions 4 |
-
Construction
Dust Impact -
Noise
Impact -
Water
Quality Impact (Construction Phase) -
Waste
Management (Construction Waste) -
Landscape
and Visual |
-
Regular watering on exposed worksites and haul
road. -
Stockpiling area should be provided with covers
and water spraying system. -
Only well-maintained plant to be operated
on-site. -
Plant known to emit noise strongly in one
direction, where possible, be oriented so that noise is directed away from
nearby NSRs. -
Mobile plant to be sited as far away from NSRs as
possible practicable. -
All open stockpiles of construction materials of
more than 50m3 to be covered with tarpaulin. -
Manholes to be adequately covered and temporarily
sealed so as to prevent silt, construction materials or debris being washed
into the drainage system. -
All vehicles and plant to be cleaned before
leaving a construction site to ensure no earth, mud, debris and the like is
deposited by them on roads. -
Segregate and store different types of waste in
different containers, skip or stockpiles to enhance reuse or recycling of
materials and their proper disposal. -
Sort out demolition debris and excavated
materials from demolition works to recover reusable/recyclable portions. -
Provide training to workers on appropriate waste
management procedures, including waste reduction, reuse and recycling. -
To adopt other good site practice, such as
arrangements for collection and effective disposal to an appropriate facility,
of all wastes generated at the site and regular cleaning and maintenance programme of drainage. -
Chemical wastes to be stored in appropriate
containers and collected by a licensed chemical waste Contractor. Chemical
wastes (e.g. spent lubricant oil) should be recycled at an appropriate
facility as far as possible, while the chemical waste that cannot be recycled
should be disposed of at either the Chemical Waste Treatment Centre, or
another licensed facility, in accordance with the Waste Disposal (Chemical
Waste) (General) Regulation. -
Tree Protection & Preservation – Exiting
trees to be retained within the Project Site should be carefully protected
during construction. In particular OVTs will be preserved according to ETWB
Technical Circular (Works) No. 29/2004. -
Tree Transplantation – Trees
unavoidably affected by the Project works should be transplanted where
practical. Trees should be transplanted straight to their final receptor site
and not held in a temporary nursery as far as possible. -
Erect 2m high dull green site boundary fence. -
Light control – Construction day and night time
lighting should be controlled to minimize glare impact to adjacent VSRs
during the Construction phase. |
|
(b)
Erection of site hoarding |
Portions 3, 4 |
|||
|
(c)
C&D waste disposal |
Portion 1, 2,
4, 5 |
|||
|
(d)
Ground Investigation works |
Portion 4 |
|||
|
(e)
Construction of box culvert |
Portions 2 |
|||
|
(f)
Filling works |
Portions 1, 2, 4 |
|||
|
(g)
Tree felling / Disposal of yard waste |
Portions 4, 5 |
|||
|
(h)
Construction of site haul road |
Portions 4 |
|||
|
(i)
Drainage Works |
Portion 1, 3,
4, 5 |
|||
|
(j)
Sewerage works |
Portion 1, 3,
4, 5 |
|||
|
(k)
Construction of Noise Barrier |
Portion
5 |
|||
|
(l)
Waterworks |
Portion
1 |
|||
|
|
|