Table E1 Implementation Schedule for Yuen Long & Kam Tin Sewerage and Sewage Disposal Stage 1 (DE) EIA
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EM&A Ref |
Environmental Protection Measures |
Objectives of the Recommended Measures
& Main Concerns |
Location of the measure |
Implementation Agent |
Implementation Stage** |
Relevant Legislation & Guidelines |
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Des |
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Dec |
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CONSTRUCTION PHASE |
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AIR QUALITY - Construction Phase |
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The
following measures are enforceable under the Air Pollution Control (Construction Dust) Regulations |
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Site boundary and entrance |
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3.5 |
A1 |
·
where
a site boundary adjoins a road, street, service lane or other area accessible
to the public, hoarding of not less than 2.4 m high from ground level should
be provided along the boundaries of the seven pumping stations sites and the
works area where the Engineer’s site office and the Contractor’s site office
erected; |
To
prevent access to the site and control potential dust impacts from
construction works. |
Site wide and throughout the full duration of the
construction contract. |
The Contractor |
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Part III, Clause 13 (c), Air
Pollution Control (Construction Dust) Regulations |
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Access Road |
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3.5 |
A2 |
· the portion of
any road leading only to a construction site that is within 30 m of a
discernible or designated vehicle entrance or exit should be kept clear of
dusty materials; |
To
control potential dust impacts from vehicle movements. |
Site wide and throughout the full duration of the
construction contract. |
The Contractor |
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Part III, Clause 14, (b), Air
Pollution Control (Construction Dust) Regulations |
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Stockpiling of
Dusty Materials |
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3.5 |
A3 |
· any stockpile of
dusty materials should be either covered entirely by impervious sheeting and
placed in an area sheltered on the top and the 3 sides or sprayed with water
so as to maintain the entire surface wet; |
To
control potential dust impacts during excavation and stockpiling activities. |
Site wide and throughout the full duration of the
construction contract. |
The Contractor |
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Part IV, Clause 18, (a, b &
c), Air Pollution Control (Construction Dust) Regulations |
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Loading, unloading
or transfer of dusty materials |
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3.5 |
A4 |
· all dusty
materials should be sprayed with water or a dust suppression chemical immediately prior to any loading and
unloading so as to maintain the dusty materials wet; |
To
control potential dust impacts during material handling and truck movements. |
Site wide and throughout the full duration of the
construction contract. |
The Contractor |
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Part IV, Clause 19, Air
Pollution Control (Construction Dust) Regulations |
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Use of vehicles |
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3.5 |
A5 |
· every vehicle
should be washed to remove any dusty materials from its body and wheels
immediately before leaving a construction site; |
To
control potential dust impacts from vehicle movements. |
Site wide and throughout the full duration of the
construction contract. |
The Contractor |
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Part IV, Clause 21, (1), Air
Pollution Control (Construction Dust) Regulations |
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3.5 |
A6 |
· where a vehicle
leaving a construction site is carrying a load of dusty materials, the load
should be covered entirely by clean impervious sheeting to ensure that the
dusty materials do not leak from the vehicle; |
To
control potential dust impacts during material transportation. |
Site wide and throughout the full duration of the
construction contract. |
The Contractor |
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Part IV, Clause 21, (2), Air
Pollution Control (Construction Dust) Regulations |
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Power-driven
drilling, and cutting |
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3.5 |
A7 |
· water should be
continuously sprayed on the surface where any mechanical breaking operation
that causes dust emission is carried out, unless the process is accompanied by
the operation of an effective dusty extraction and filtering device; |
To
control potential dust impacts during mechanical breaking. |
Site wide and throughout the full duration of the
construction contract. |
The Contractor |
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Part IV, Clause 22, Air
Pollution Control (Construction Dust) Regulations |
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Excavation and
earth moving |
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3.5 |
A8 |
· the working area
of excavation should be sprayed with water immediately before, during and immediately
after the operation so as to maintain the entire surface wet; |
To
control potential dust impacts arising from excavation works. |
Site wide and throughout the full duration of the
construction contract. |
The Contractor |
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Part IV, Clause 24, Air
Pollution Control (Construction Dust) Regulations |
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Construction of the
superstructure of a building |
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3.5 |
A9 |
·
where
a scaffolding is erected around the perimeter of a building under construction,
effective dust screens, sheeting or netting should be provided to enclose the
scaffolding from the round floor level of the SPS, or if a canopy is provided
a the first floor level, from the first floor level, up to the highest level
of the scaffolding; and |
To
control potential dust impacts from SPS building construction works. |
Full duration of SPS construction contract. |
The Contractor |
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Part I, Clause 6, (a), Air
Pollution Control (Construction Dust) Regulations |
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3.5 |
A10 |
·
any
skip hoist for material transport should be totally enclosed by the
impervious sheeting. |
To
control potential dust impacts during material transportation. |
Full duration of SPS construction contract. |
The Contractor |
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Part I, Clause 6, (b), Air
Pollution Control (Construction Dust) Regulations |
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NOISE - Construction Phase |
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General Site Clearance -Demolition Works |
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4.7.1 |
B1 |
·
Use of quiet PME which meet the SWLs
taken from British Standard, Noise and
Vibration Control on Construction Open Sites, BS 5228: Part 1: 1997 (Examples
of these PME are shown in Table F2), |
To
control potential noise impacts during site clearance and demolition works |
Site wide and throughout the full duration of the
construction contract. |
The Contractor |
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Annex 5 of EIAO-TM |
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Construction of Sewage Pumping Stations P1,
P2, P3, P4, P5, P6 &P7 |
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4.7.1 |
B2 |
·
Use of quiet PME which meet the SWLs taken from British Standard, Noise and Vibration Control on
Construction Open Sites, BS 5228: Part 1: 1997, |
To
minimise potential noise impacts arising during the construction of P1,
P2, P3, P4, P5, P6 &P7 |
Site wide and throughout the full duration of the
construction contract. |
The Contractor |
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Annex 5 of EIAO-TM |
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·
Adoption of temporary noise barrier, in the form of a site hoarding
(with a superficial density of at least 20kg/m2, with no substantial gaps),
along the site boundary of the pumping station sites. |
To
minimise potential noise impacts arising during the construction of P1,
P2, P3, P4, P5, P6 &P7 |
Site wide and throughout the full duration of the
construction contract. |
The Contractor |
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Annex 5 of EIAO-TM |
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Sewers and Rising Mains
using Open Trench Method |
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4.7.1 |
B3 |
·
Use of quiet PME which meet the SWLs
taken from British Standard, Noise and
Vibration Control on Construction Open Sites, BS 5228: Part 1: 1997, |
To
control potential noise impacts during excavation works. |
Site wide and throughout the full duration of the
construction contract. |
The Contractor |
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Annex 5 of EIAO-TM |
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4.7.1 |
B4 |
·
Use of handheld breakers for all initial road opening activities,
when breaking tarmac/concrete road surface to a depth of 300mm or when granular
material is reached. |
To
control potential noise impacts during road opening activities. |
Where there are NSRs located within 50m of the line of
sight. Throughout the full
duration of the road opening activities. |
The Contractor |
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4.7.1 |
B5 |
·
Use of movable noise barriers or 3
sided enclosures for all initial road opening activities (breaking
tarmac/concrete road surface to a depth of 300mm or when granular material is
reached), where there are NSRs located within 50m of the line of sight from
the works area. |
To
control potential noise impacts during road opening activities. |
Where there are NSRs located within 50m of the line of
sight. Throughout the full
duration of the road opening activities. |
The Contractor |
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Sewers and Rising Mains using Pipe Jacking
Method |
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4.7.1 |
B6 |
·
Use of quiet PME which meet the SWLs
taken from British Standard, Noise and
Vibration Control on Construction Open Sites, BS 5228: Part 1: 1997, |
To
control potential noise impacts from PME during construction works |
Site wide and throughout the full duration of the
construction contract. |
The Contractor |
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Annex 5 of EIAO-TM |
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Road Pavement and Finishes |
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4.7.1 |
B7 |
·
Use of quiet PME which meet the SWLs taken from British Standard, Noise and Vibration Control on
Construction Open Sites, BS 5228: Part 1: 1997, |
To
control potential noise impacts from PME during pavement and finish works |
Site wide and throughout the full duration of the
construction contract. |
The Contractor |
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Annex 5 of EIAO-TM |
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WATER QUALITY - Construction Phase |
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No water quality monitoring is required under this study. |
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WASTE - Construction Phase |
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6.6.2 |
D1 |
The Contractor shall obtain the necessary waste disposal permits
from the appropriate authorities for the disposal of chemical and C&D
waste, ·
Chemical
Waste Producer and Chemical Waste Disposal Licence (Waste Disposal (Chemical Waste) (General) Regulations); and ·
Dumping
Licence (Land (Miscellaneous
Provisions) Ordinance (Cap 28)) |
To
monitor the collection, handling and disposal of chemical waste and C&D
waste, and in compliance with relevant Hong Kong Standards and Regulations. |
Site wide and throughout the full duration of the
construction contract. |
The Contractor |
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Waste Disposal Ordinance (Cap
354), Waste Disposal (Chemical Waste)(General) Regulation (Cap 354), the Land
(Miscellaneous Provisions) Ordinance (Cap 28)) |
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Chemical
Waste |
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6.6.2 |
D2 |
Chemical waste that is produced, as defined by
Schedule 1 of the Waste Disposal
(Chemical Waste) (General) Regulation, should be handled in accordance
with the regulations and Code of Practice on the Packaging, Handling and
Storage of Chemical Wastes as follows. All chemical waste producers should be
registered with the EPD. |
To control the handling, storage and disposal of chemical
waste, in order to minimise potential spillages/leakages and human health and
environmental impacts. |
To be implemented at all worksites throughout the full
duration of the construction phase. |
The Contractor |
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Part II, (6) Waste Disposal
(Chemical Waste) (General) Regulation |
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Storage,
Packaging and Labelling of Chemical Waste |
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6.6.2 |
D3 |
Containers used for storage of chemical wastes
should: · be suitable for
the substance they are holding, resistant to corrosion, maintained in a good
condition, and securely closed; |
To
ensure the proper storage, packaging and labelling of chemical waste in
accordance with the Regulations. |
To be implemented at all worksites throughout the full
duration of the construction phase. |
The Contractor |
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Part IV, (9, 10, 11 & 12)
Waste Disposal (Chemical Waste) (General) Regulation |
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· have a capacity
of less than 450 L unless the specifications have been approved by the EPD;
and · display a label
in English and Chinese in accordance with instructions prescribed in Schedule
2 of the Regulations. |
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Storage of
chemical waste |
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6.6.2 |
D4 |
The storage area for chemical wastes should: · be clearly
labelled and used solely for the storage of chemical waste; |
To
ensure the proper storage of chemical waste in accordance with the
Regulations. |
To be implemented at all worksites throughout the full
duration of the construction phase. |
The Contractor |
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Part IV, (13,14, 15, 16, 17,
& 18) Waste Disposal (Chemical Waste) (General) Regulation |
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· be enclosed on
at least 3 sides; · have an
impermeable floor and bunding, of capacity to accommodate 110% of the volume of
the largest container or 20% by volume of the chemical waste stored in that
area, whichever is the greatest; |
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· have adequate
ventilation; · be covered to prevent
rainfall entering (water collected within the bund must be tested and
disposed as chemical waste, if necessary); and · be arranged so
that incompatible materials are adequately separated. |
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Disposal of
chemical waste |
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· The Contractor
should ensure that the disposal of chemical waste is via a licensed Waste
Collector and in accordance with the
Waste Disposal (Chemical Waste) (General) Regulations. |
To
control the disposal of chemical waste in accordance with the Regulations. |
To be implemented at all worksites throughout the full
duration of the construction phase. |
The Contractor |
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Part IV, (20 -25) Waste
Disposal (Chemical Waste) (General) Regulation |
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Management of Waste Disposal |
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6.6.2 |
D5 |
A trip-ticket system should be established which
monitors the disposal of C&DM and solid wastes at public filling facilities
and landfills and to control fly-tipping, in accordance
with Land (Miscellaneous Provisions)
Ordinance (Cap28) and the Works
Bureau Technical Circular No. 5/99. |
To monitor the disposal of C&DM and solid wastes at
public filling facilities and landfills and to control fly-tipping. |
To be implemented at all worksites throughout the full
duration of the construction phase. |
The Engineer/ Contractor |
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Land (Miscellaneous Provisions)
Ordinance (Cap 295) and Works Bureau Technical Circular No. 5/99. |
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LAND
CONTAMINATION-
Construction Phase |
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7.5.6 |
E1 |
A revised CAP should be submitted to the EPD for approval before
the commencement of the construction works. Following receipt of the EPD’s
approval, the CAP shall be implemented and the findings of the investigations
will be reported in the Contaminated Assessment Report (CAR), before ground
disturbance is allowed at the concerned sites. If land contamination is confirmed, a Remediation Action Plan
(RAP) shall be prepared, and both the CAR and the RAP shall be submitted as a
combined report to the EPD for approval before disturbing the ground of the
concerned sites. If applicable and required in consultation with the EPD, the
contaminated site(s) shall be remediated in accordance with the approved
CAR/RAP. |
To determine the presence of soil and groundwater contamination
and remedy any potential concerns to acceptable levels. |
To be implemented before the commencement of the construction
works. |
To be Implemented by DSD or their sub-consultants at the
Detailed Design Stage, depending upon when site access can be gained. |
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EIAO TM Annex 19/3.1.1 &
3.1.2 |
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ECOLOGY - Construction Phase |
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Mitigation
Measures Adopted - Avoidance |
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8.7.1 |
F1 |
Construction activities shall be prohibited
during the winter season (November to March) along the section of the
proposed sewerage alignment, which fall within the Deep Bay Wetland
Conservation Area and the Deep Bay Wetland Buffer Area (WCA and WBA) and
close to the locations of ecologically sensitive species (including
Intermediate Egret, Black-faced Spoonbill, Buzzard, Imperial Eagle and
Avocet). (See Figure 8.7a attached).
Regular site inspections (at least twice a month) should be conducted
by the Environmental Team during the winter season (November to March) to
ensure proper implementation of this restriction |
To schedule construction works in order to
minimise potential impacts to winter visiting birds. To be confirmed by
regular site inspections. |
At identified location (Figure
8.7a) for the full duration of the construction contract. |
The Contractor |
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Mitigation Measures Adopted - Minimisation |
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8.7.2 |
F2 |
Pipe jacking method should be used instead of dredging where sewers and
rising mains cross over existing MDC within the WCA and WBA. |
To minimise potential construction noise impacts to
ecological sensitive receivers within the WCA/WBA. |
For the full duration of the construction contract. |
The Contractor |
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8.7.2 |
F4 |
Regular
inspections (at least twice a month) should be conducted by the ET during the
winter season (November to March) for the remaining sections of the proposed
sewerage alignment (including parts of S4, S5 and S6) within the WCA and WBA,
where construction activities cannot be rescheduled. The site
inspections shall check and report the number of workfronts and
implementation of mitigation measures (i.e. erection of movable noise
barriers with a suitable footing along the sites) in the monthly EM&A
reports. |
To schedule noisy construction activities to minimise
potential impacts to winter visiting birds. |
Workfronts other than identified sections within WBA &
WCA (see Figure 8.7a attached) throughout
the full duration of the construction contract. |
The Contractor |
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Mitigation Measures Adopted |
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8.7.3 |
F5 |
Quietened construction plant and equipment (as
shown in Table F2) should be used for
the construction of pumping stations (P3 and P2) and sewerage alignment (S4,
S5 and S6) located within the WCA and WBA. |
Quiet construction plant shall minimise potential noise
impacts to the wildlife, particularly rare birds including Black-faced Spoonbill,
Buzzard, Hobby, Imperial Eagle, Intermediate Egret, Avocet and Black-eared
Kite |
At described locations and throughout the full duration of
the construction contract. |
The Contractor |
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8.7.4 |
F6 |
Erection of fences along the boundary of pumping
station construction sites (P1 to P7) before the commencement of construction
works to prevent tipping, vehicle movements, and encroachment of personnel
into adjacent areas, particularly where close to the Humped Fig Tree Ficus tinctoria subsp. gibbosa (pumping station P7) and P2
to avoid disturbance to the remaining pond areas (0.7 ha); |
To erect fences to prevent encroachment of construction
activities onto adjacent areas. |
At P1 to P7 for full duration of the construction contract. |
The Contractor |
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8.7.4 |
F7 |
No filling and dumping to the remaining abandoned
fishpond at P2. |
To avoid disturbance to abandoned fishponds from construction
activities and illegal dumping. |
At P2 for full duration of the construction contract |
The Contractor |
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8.7.4 |
F8 |
Installation and operation of silt removal
facilities at construction sites of P1 to P7. The silt removal facilities should be designed in
accordance with Appendix A1 of ProPECC Note PN1/94 Construction Site
Drainage. The minimal total
combined volume of the silt removal facilities at Nam Sang Wai SPS (P3) should
be 15m3. |
To install silt removal facilities in potentially impact
streams and ponds to prevent sedimentation. |
At P1 to P7 for full duration of the construction contract. |
The Contractor |
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8.7.4 |
F9 |
No open fires within the site boundary during construction
and provide temporary fire fighting equipment in the work areas. |
To prohibit open fires, thereby minimising potential damage
to trees and shrubs. |
Site wide and throughout the full duration of the
construction contract. |
The Contractor |
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Air Pollution Control (Open
Burning) Regulation |
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8.7.4 |
F7 |
No filling and dumping to the remaining abandoned
fishpond at P2. |
To avoid disturbance to abandoned fishponds from construction
activities and illegal dumping. |
At P2 for full duration of the construction contract |
The Contractor |
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8.7.4 |
F8 |
Installation and operation of silt removal
facilities at construction sites of P1 to P7. The silt removal facilities should be designed in accordance
with Appendix A1 of ProPECC Note PN1/94 Construction Site Drainage. |
To install silt removal facilities in potentially impact
streams and ponds to prevent sedimentation. |
At P1 to P7 for full duration of the construction contract. |
The Contractor |
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8.7.4 |
F9 |
No open fires within the site boundary during
construction and provide temporary fire fighting equipment in the work areas. |
To prohibit open fires, thereby minimising potential damage
to trees and shrubs. |
Site wide and throughout the full duration of the
construction contract. |
The Contractor |
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Air Pollution Control (Open
Burning) Regulation |
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FISHERIES - Construction
Phase |
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No specific mitigation measures are required for inclusion in
the EP. |
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CULTURAL HERITAGE - Before Construction
Phase |
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10.7 |
G1 |
After land resumption but before the construction work takes
place for the proposed Shui Tsan Tin pumping station (P4) and Ng Ka Tsuen
pumping station (P5) commences, a period of 6 months for each of the sites
should be allowed for an archaeological investigation, method agreed with the
AMO, to be undertaken. |
To determine the archaeological significance of the area and
the need for further detailed archaeological investigation. |
To be undertaken for a minimum of six months after land
resumption but before any construction works takes place. |
To be implemented by DSD or appointed Contractor. |
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The survey shall be divided into two
phases. |
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The first phase is to undertake 6 test pits
with dimensions 1 m x 1.5 m (2 test pits for each site) to assess if archaeological
deposits exist and their possible extent. If no archaeological interest is identified, no further
action is required |
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If the result is found positive, rescue excavation
should be undertaken if the deposits are found to be common and not
significant, so that preservation by record is achieved. However, if a highly significant
archaeological deposit is identified, the design of the P4 and P5 should be
reviewed to integrate the preservation in
situ of the archaeological materials or an alternative feasible site for
P4 and P5 may be sought and rescue excavation on highly significant
archaeological deposit should be regarded as the last resort. |
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The AMO should be prior consulted for the
result of the investigation and the proposed mitigation measures. The investigation would be laid down
as a condition in the Environment Permit. |
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Any archaeological work (i.e. watching brief
and site investigations) undertaken by the Contractor should be conducted by
a qualified archaeologist, who is licensed by the Antiquities Authority under
the Antiquities and Monuments Ordinance
(Cap. 53). The Contractor should inform AMO at least four weeks prior to the
commencement of the archaeological evaluation, of the expected start date and
programming of the works. This is to allow AMO the opportunity of arranging
the on-site monitoring of the works. |
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Vibration monitoring |
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10.7 |
G2 |
Based on the proposed construction works,
potential vibration impacts are envisaged at Site E, Ng Ka Tsuen. It is therefore recommended at the detail
design stage that the pumping station is set back to avoid encroachment of safe margins from the historic
compound at Ng Ka Tsuen. |
The ET shall conduct vibration monitoring at the historical
compound at Ng Ka Tsuen, to ensure construction works to not impact the
site. |
Next to Ng Ka Tsuen pumping station / Prior to and during
construction work/Completion of construction work |
The Contractor |
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For construction phase, the Contractor
shall be required to avoid encroachment of the safe margins of 7.5 m from the
historic building of Ng Ka Tsuen and pay particular attention to remove
underlying obstructions such as buried foundations, floors etc before
continuing with bored piling and sheet piling operations. All sheet piling operation shall be
set back by 25 m from the historic building of Ng Ka Tsuen. If demolition within 7.5 m of the
historic compound at Ng Ka Tsuen is required, preference should be given to
use of hand method and use of mini excavator (Bobcat type plant) to remove
materials from the area at ground level. |
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Pile driving equipment
should meet the recommended criteria.
For sheet piling, an international construction equipment Model 14RF is
an example of a resonant free vibrator. It is a type of pile driver designed
so that the rotating system of weights within the driver can be accelerated
to operating speed with the rotating masses in balance and, once at operating
frequency and above resonant mode, the weights are rearranged to be out of
phase and hence generated the vibration required to drive the pile. |
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Trail sheet piling should be conducted using the proposed
plant, and the ET should undertake vibration monitoring prior to proceeding
with works. The monitoring should be taken at the closest accessible point to
the historic building to enable the
Engineer to assess the potential risk from the expected levels of vibration
at Ng Ka Tseun. |
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Structural
Survey |
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10.7 |
G3 |
Prior to the
commencement of construction works, a structural survey of Ng Ka Tsuen historical
buildings (Site E) should be undertaken by a specialist surveyor approved by
AMO to record the condition of the historic compound. The survey should be conducted four
weeks prior to the commencement of the construction works. This survey shall focus on the
quality of construction and finishes and the general condition of the
structure and its finishes. A schedule of defects (including cracks) is to be
prepared for submission to the Engineer and AMO and shall be supported by
photographic record. Upon approval to proceed with the works, vibration
monitoring is recommended during the site preparation, earthworks and
foundation and reinstatement stages. |
To determine the impact of the construction
works on the historical buildings at Ng Ka Tsuen, vibration monitoring shall
be conducted. |
Next to Ng Ka Tsuen 4 weeks prior to and during construction
work/Completion of construction work |
The Contractor |
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Upon completion of the structural survey, vibration monitoring
should be undertaken by the ET at Ng Ka Tsuen historical
buildings. Firstly on a trial basis to ascertain locations
of highest impact within the building relative to an appropriate ground level
location on the worksite boundary; the setting of these levels shall be
subject to AMO approval and accessibility. Thereafter monitoring shall be undertaken for the duration
of the works and, where exceedance of the limit is noted, the works shall be
stopped and the Contractor shall be required to prepare a plan for the
approval of the Engineer and AMO to ensure that the works will continue
without exceedance of the vibration criteria. |
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If at any time the Engineer
should note any damage to the decoration and structure of Ng Ka Tsuen
historical buildings, the Contractor shall stop works and prepare a method
statement outlining provisions to ensure no further deterioration of the
building. Such measures may comprise
alternative selection of plant, method of construction, use of cut off trench
located close to the source of the vibration. |
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LANDSCAPE AND VISUAL - Construction Phase |
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H1 |
The site inspections
shall check and report the implementation of mitigation measures (i.e.
top-soil are reused and new compensatory planting works are carried out
immediately after the construction of the civil structure) in the monthly
EM&A reports. |
To minimise potential landscape and visual impacts. |
To be implemented during the construction phases of the
project. |
The Contractor |
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The first monthly EM&A Report should also report the appearance
of the temporary hoarding barriers. |
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H2 |
Prior to application for an Environmental Permit,
a set of landscape plans and building elevations of the proposed pumping stations
should be submitted for approval by the EPD. The landscape plans and pumping station elevations
should demonstrate that the following elements are considered: · existing landscape elements (such as mature trees), transplantation of valuable trees, new compensatory planting |
To
minimise potential landscape and visual impacts. |
To be implemented during the design and construction phases
of the project. |
DSD and The Contractor |
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·
incorporate information on materials, details and textures so as to
be as visually recessive as possible and in a style that fits with the
surrounding village buildings. |
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·
colour should be of low chromatic intensity to reduce the potential
contrast between the structures and their background. The external finishing of the Pumping
Stations shall be designed in conjunction with the landscape scheme. |
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·
a minimum screen planting of 3m width and use of trees with a dense
canopy of up to 5 m in height
subject to constraints such as engineering and land availability. |
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·
felling of mature trees are kept to a minimum. |
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EM&A REQUIEMENTS - Construction Phase |
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Air Quality |
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3.7 |
I1 |
Subject to the Environmental Protection
Departments (EPDs) agreement, construction phase dust monitoring shall be
undertaken at the following locations in accordance with the recommendations
of the EIA. |
Installations of the dust monitoring stations to ensure the
action and limit levels are not exceeded. |
At specified dust monitoring locations for the duration of
the construction works. |
To be undertaken by the Environmental Team (ET) and reviewed
and audited by the Engineer /DSD |
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Air Pollution Control
(Construction Dust) Regulations |
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· Worksite
boundary facing Scattered house in Nam Sang Wai (AM1); · Worksite
boundary in Nam Sang Wai (AM2); · Worksite
boundary facing Kam Kong Villa (AM3); · Worksite
boundary facing Scattered House opposite to Proposed P6 (AM4); |
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· Worksite
boundary facing Fung Kat Heung (AM5); · Worksite
boundary facing Scattered House near Route 3 (AM6); |
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· Worksite
boundary facing Scattered House in Nam Sang Wai (AM7); · Worksite boundary
facing Shui Tsan Tin Tsuen (AM8); |
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· Worksite
boundary facing Scattered House beside Kam Sheung Live Church (AM9); ·
Worksite
boundary facing Hip Tin Kung (AM10); |
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·
Worksite
boundary facing Leung Uk Tsuen (AM11), ·
and
at any additional locations, where considered necessary, in agreement with
EPD. |
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Construction Noise |
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4.9.1 |
I2 |
Subject to the Environmental Protection Departments (EPDs)
agreement, construction phase noise monitoring shall be undertaken at the
following locations in accordance with the recommendations of the EIA. |
Installations of the noise monitoring stations to ensure the
action and limit levels are not exceeded. |
At specified noise monitoring locations throughout the
duration of the construction works. |
To be undertaken by the Environmental Team (ET) and reviewed
and audited by the Engineer |
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Noise Control Ordinance |
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·
(NM1)
Yuk Yat Garden Phases II (D4); ·
(NM2)
Planned CDA Site (A/YL-KTN/60) (D9); ·
(NM3)
Scattered House in Nam San Wai (D12); ·
(NM4)
Scattered House in Nam San Wai (D11); ·
(NM5)
Nam San Wai (D15); ·
(NM6)
Scattered House near Route 3 (D17); |
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·
(NM7)
Fung Kat Heung (D19); ·
(NM8)
Kam Hing Wai (D23); ·
(NM9)
Scattered House opposite to proposed P6 (D26); ·
(NM10)
Scattered House beside Kam Sheung Live Church (D30); |
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·
(NM11)
Kam Tsin Wai (D38); ·
(NM12).Shui
Tsan Tin Tsuen (D41); ·
(NM13)
Scattered House opposite to Leung Uk Tseun (D28); ·
(NM14)
Ng Ka Tsuen (D32); and ·
(NM15)
Hip Tin Kung (D27). and at any additional locations, where considered necessary, in
agreement with EPD |
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OPERATIONAL PHASE |
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AIR QUALITY - Operational Phase |
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The following mitigation measures have been
recommended to control odour emissions: |
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3.5.2 |
A1 |
· the main odour
sources such as wet well and screening house should be enclosed; |
To
control potential odour concerns. |
To be implemented throughout the operating life time of the
project. |
Drainage Services Department (DSD) |
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3.5.2 |
A2 |
· odour removal
system such as activated carbon filter should be installed to reduce the odour
emission to the vicinity; |
To
control potential odour concerns. |
To be implemented throughout the operating life time of the
project. |
Drainage Services Department (DSD) |
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NOISE – Operational Phase |
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No specific mitigation measures are required for inclusion in
the EP. |
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WATER QUALITY - Operational Phase |
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5.7.2 |
C1 |
The following measures should be
implemented to reduce the risk of failure of the pumping stations which would
results in emergency discharge of untreated sewage effluent and should
failure occur to minimise the duration of such failures. |
To reduce the risk of failure of the pumping stations and
emergency discharge of untreated sewage effluent. |
To be implemented throughout the operating life time of the
project. |
Drainage Services Department (DSD) |
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·
The overflow bypass should be operated only in an emergency, such as
prolonged power failure.
Overflow must not occur on a regular basis such as to facilitate
routine maintenance. |
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·
Standby pump should be provided to facilitate maintenance and
repairing of equipment; |
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·
Dual (back-up) power supply should be provided. Dual power supply could be in the format
of ring main, or an automatic-operated emergency generator with sufficient
capacity to cope with the demand loading of the essential plant equipment; |
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·
If the pumping station is unmanned, a telemetry system should be provided
to the nearest manned station/plant so that swift actions could be taken in
the case of malfunction of the unmanned facilities; |
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·
Hand-cleaned screens should be provided at the overflow bypass to prevent
the discharge of floating solids into receiving water bodies. The clear spacing of the bar screen
should normally be about 25mm; |
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·
The discharge point of the overflow bypass should be below the low
water mark; and |
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·
The
discharge point of the overflow bypass should be away from sensitive
receivers such as gazetted beaches, mariculture zones, seawater intakes,
water gathering grounds, country parks, marinas, boat parks, nature reserves,
sites of special scientific interest, marine parks/marine reserves, streams
with water for human consumption…etc, and water with low assimilative
capacity such as typhoon shelter or embayed water. In this connection, the location of the overflow bypass should
be provided by the project proponent at detail design stage for DEP approval. |
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WASTE - Operational Phase |
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No specific mitigation measures are required for inclusion in
the EP. |
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ECOLOGY- Operational Phase |
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No specific mitigation measures are required for inclusion in
the EP. |
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FISHERIES - Operational Phase |
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No specific mitigation measures are required for inclusion in
the EP. |
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CULTURAL
HERITAGE - Operational Phase |
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No specific mitigation measures are required for inclusion in the EP. |
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LANDSCAPE AND VISUAL - Operational Phase |
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No specific mitigation measures are required for inclusion in
the EP. |
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EM&A REQUIREMENTS - Operational Phase |
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Noise |
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4.9.2 |
E1 |
Subject to the Environmental Protection Departments (EPDs)
agreement, operational phase noise monitoring shall be undertaken at the
following locations in accordance with the recommendations of the EIA. |
Installations of the noise monitoring stations to ensure the
action and limit levels are not exceeded. |
At specified noise monitoring locations prior to the
commissioning of the pumping stations. |
DSD |
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Noise Control Ordinance |
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·
Kam
Tin P1 (OM1); ·
Sha
Po P2 (OM2); ·
Nam
San Wai P3 (OM3); ·
Shui
Tsan Tin P4 (OM4); |
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·
Ng
Ka Tsuen P5 (OM5); ·
Pang
Ka Tsuen P6 (OM6); and ·
Leung
Uk Tsuen P7 (OM7). |
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and
at any additional locations, where considered necessary, in agreement with
EPD. |
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Des
= Design, C= Construction, O= Operation, Dec = Decommissioning |
||||||||||
Table E2 Sound Power Levels for Specific Silenced PME
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PME |
BS
5228 Table No. |
Ref.
No. |
SWL
dB(A) max |
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Air Compressor |
C7 |
44 |
103 |
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Backhoe |
C3 |
35 |
106 |
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Bulldozer |
C9 |
2 |
104 |
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Crawler Crane |
C7 |
110 |
106 |
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Dump Truck |
C9 |
27 |
105 |
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Excavator |
C3 |
97 |
105 |
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Generator |
C7 |
62 |
100 |
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Handheld Hydraulic Breaker |
C2 |
10 |
110 |
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Excavator mounted breaker |
C3 |
18 |
110 |
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Excavator for trenching |
C8 |
33 |
102 |
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Wheeled Excavator-Loader |
C8 |
15 |
103 |
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Concrete Lorry Mixer |
C6 |
35 |
100 |
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Poker Vibrator |
C6 |
32 |
100 |
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Lorry |
C9 |
27 |
105 |
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Circular Saw |
C7 |
75 |
105 |
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Roller |
C3 |
115 |
102 |
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Asphalt Paver |
C8 |
24 |
101 |
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Small/medium size trucks |
C9 |
19 |
102 |