14.6 Waste
Management Implications
14.7 Land
Contamination Impact
14.9 Landscape
and Visual Impact
14.10 Cultural
Heritage Impact
14.11 Environmental
Monitoring and Audit
Table 14.1 Summary
of Environmental Impacts Associated with the Project
Environmental Issue |
Sensitive Receivers/
Assessment Points |
Impact Prediction
Results |
Relevant Standards/
Criteria |
Extents of
Exceedances |
Impact Avoidance
Measures/ Mitigation Measures |
Residual Impacts |
Air Quality |
|
|
|
|
|
|
Construction Phase |
17 assessment points |
1-hour Average TSP
Conc.: 148-421 mg/m3 24-hour Average TSP
Conc.: 110-23 |
EIAO-TM and Air
Quality Objective |
Nil |
Four times daily watering with complete coverage of active construction area Requirements of the Air Pollution Control (Construction Dust) Regulation The following mitigation measures, good site practices and a comprehensive dust monitoring and audit programme are recommended to minimise cumulative dust impacts. ·
Strictly
limit the truck speed on site to below |
Nil |
|
|
|
|
|
·
Watering
during excavation and material handling; |
|
|
|
|
|
|
·
Provision
of vehicle wheel and body washing facilities at the exit points of the site,
combined with cleaning of public roads where necessary; and |
|
|
|
|
|
|
·
Tarpaulin
covering of all dusty vehicle loads transported to, from and between site
locations. |
|
Operational Phase |
21 assessment points |
1-hour Average NO2 Conc.: 73- 24-hour Average NO2 Conc.: 62- 24-hour Average RSP Conc.: 56- |
Air Quality Objective |
Nil |
Not Applicable |
Nil |
|
Air quality inside CWB Tunnel & deckover for planned HKCEC Atrium Link |
CWB Tunnel – achieve
EPD recommended standard of 1 ppm NO2 concentration |
EPD Tunnel Air Quality
Guidelines |
Nil |
Not Applicable |
Nil |
Deckover on Atrium
Link – the
predicted maximum NO2 concentrations (5 minutes average) under
normal traffic flow and congested traffic flow would be 114mg/m3 and |
|
|
|
|
||
Noise |
|
|
|
|
|
|
Construction Phase |
N1 to N3 |
Predicted noise levels
would be in the range of 71 to 81 dB(A). |
Domestic premises:
75dB(A) |
Domestic premises:
Exceed the noise standard by up to 5 dB(A). |
Use of quiet equipment
and movable noise barriers to mininise construction noise impact |
Nil |
|
|
|||||
Operational Phase |
N1 to N6 |
NSRs N1 – N6: 60 – 87 dB(A) |
Domestic premises: 70 dB(A) |
Domestic premises: Exceed the noise standard by up to 17dB(A). |
Not Applicable |
The ‘New’ road noise contributions to the overall noise levels at all representative NSRs would be less than 1.0 dB(A) and the ‘New’ road noise levels would all be below the relevant noise criteria. No adverse noise impacts arising from the ‘New’ roads are predicted at representative NSRs. Noise exceedances at the representative NSRs, if any, would be due to the existing roads. |
Water Quality |
|
|
|
|
|
|
Construction Phase |
Seawater intakes at or
near the Project site |
It is anticipated that
the water quality impacts will generally be localised during
construction. Unacceptable impact
on the identified sensitive receivers is not expected. |
Water Pollution
Control Ordinance (WPCO) Water Supplies
Department (WSD) Water Quality Criteria: for flushing intake Technical Memorandum on Standards for Effluents
Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters
(TM-DSS) ProPECC PN 1/94 “Construction Site Drainage” |
Not applicable |
Good housekeeping and stormwater best management
practices for control
of construction site runoff, stormwater discharges, sewage effluent, drainage
and general refuse |
Nil |
Operational Phase |
Seawater intakes at or
near the Project site |
It is anticipated that
the water quality impacts will generally be localised during operation. Unacceptable impact on the identified
sensitive receivers is not expected. |
WPCO WSD Water Quality
Criteria: for flushing intake TM-DSS ProPECC PN 1/94 “Construction Site Drainage” |
Not applicable |
Provision of adequately designed silt trap and oil
interceptors, as necessary |
Nil |
Waste Management Implications |
|
|
|
|
|
|
Construction Phase |
Not applicable |
General refuse from the workforce; chemical waste from plant and
equipment maintenance; and C&D material from excavation works and the
demolition of existing structures. |
1. Waste Disposal Ordinance (Cap.
354) 2. Waste Disposal (Chemical Waste) (General)
Regulation (Cap. 354) |
Not applicable |
Refer to Table 13.4 |
Nil |
|
|
|
|
|
|
|
|
|
3. Land (Miscellaneous Provisions)
Ordinance (Cap. 28) |
|
|
|
|
|
|
4. Public Health and Municipal Services
Ordinance (Cap. 132) - Public Cleansing and Prevention of Nuisances
Regulation |
|
|
|
|
|
|
|
5. Annexes 7 & 15 of EIAO TM |
|
|
|
Land Contamination Impact |
|
|
|
|
|
|
Construction Phase |
Construction Workers via
direct ingestion of and dermal contact with contaminated soils. |
No land contamination
impact is expected. |
ProPECC PN3/94 - “Contaminated Land Assessment and
Remediation” “Guidance Notes for Investigation and Remediation
of Contaminated Sites of: Petrol Filling Stations, Boatyards, and Car Repair
/Dismantling Workshops |
None |
None |
None |
|
||||||
Marine Ecological Impacts |
|
|
|
|
|
|
Construction Phase |
Marine ecological resources
in the assessment area |
No adverse ecological impact is expected. Only negligible indirect
impact on subtidal and intertidal habitats and associated marinewildlife
caused from change of water quality due to potential site run-off from
land-based construction works |
(See water quality
assessment) |
(See water quality
assessment) |
- As no adverse ecological impact on marine habitats and associated wildlife is identified, no necessary mitigation measure specific for marine ecology is required. |
Not expected |
|
|
|
|
|
|
|
Landscape and Visual Impact |
|
|
|
|
|
|
Construction Phase |
All Landscape Resources / Landscape Character Areas and Visual Sensitive Receivers within the
study area |
- Approximately 110 trees will be affected. None of these are LCSD Champion Trees or Registered Old and Valuable Trees. There are no rare species or endangered specie but common species. |
1. ETWB TCW No. 29/2004 - Registration of Old and Valuable Trees, and Guidelines for their Preservation, 2. ETWB TCW No. 3/2006 - Tree Preservation |
Not applicable |
- Existing trees to be retained on site should be carefully protected during construction. - Trees unavoidably affected by the works should be transplanted where practical. - Compensatory tree planting should be provided to compensate for felled trees. |
Landscape Impacts
- Approximately 110 trees will be affected. None of these are LCSD Champion Trees or Registered Old and Valuable Trees. There are no rare species or endangered specie but common species. |
|
|
|
|
|
- Control of night-time lighting. - Erection of decorative screen hoarding compatible with the surrounding setting. |
Visual Impacts
-
With implementation of
mitigation measures, there will still be some moderate negative visual impact
on the VSRs in the front row of high rise buildings along the waterfront from
Central to Wan Chai. Residual
impacts VSRs further away the |
Operational Phase |
All Landscape Resources / Landscape Character Areas and Visual Sensitive Receivers within the study area |
Not
applicable |
1. particularly Annexes 10 and 18, 2. EIAO Guidance Note 8/2002, 3. Town Planning Ordinance (Cap 131), |
Not applicable |
- Aesthetic design of road-related structures. - Buffer Tree and Shrub Planting to screen proposed roads and associated structures. - Aesthetic streetscape design. |
Landscape
Impacts
With implementation of mitigation measures The existing
landscape characters along the waterfront will be further enhanced by the
proposed open space. Specific
themes for the open spaces will be proposed to the waterfront from Central to
Wan Chai.
|
|
|
|
4. ETWB TCW No. 2/2004 - Maintenance of Vegetation and Hard Landscape Features, |
|
- Aesthetic design of roadside amenity areas. |
|
|
|
|
5. EIAO and TM, |
|
|
|
|
|
|
6. ETWB TCW No. 29/2004 - Registration of Old and Valuable Trees, and Guidelines for their Preservation, 7. ETWB TCW No. 3/2006 - Tree Preservation |
|
|
Visual Impacts There will be substantial to moderate positive visual
impact on VSRs along the new waterfront as the landscape and visual amenity
are generally enhanced and strengthen by the proposed project. |
Cultural Heritage Impact |
|
|
|
|
|
|
Construction Phase |
Cultural heritage
resources within the project boundary |
No adverse cultural
heritage impact is expected. |
1.
Antiquities and Monuments Ordinance (Cap.53) |
Not applicable |
None |
Nil |
|
|
|
2.
Environmental Impact Assessment Ordinance (EIAO) (Cap. 499,
S.16) |
|
|
|
|
|
|
3.
Technical Memorandum on the Environmental Impact Assessment
Process (EIAO-TM) |
|
|
|
|
|
|
4.
Guidance Notes on Assessment of Impact on Sites of Cultural
Heritage in Environmental Impact Assessment Studies (GN-CH) |
|
|
|
|
|
|
5.
6.
Marine Archaeological Investigation Guidelines. |
|
|
|
Table
14.2 Summary
of Key Environmental Outcomes/ Benefits
Issue |
Environmental Outcomes/Benefits |
The Project |
Requirements: The major element of the future ground level road system is Road P2, which runs east-west from Central to connections with the existing road network in Wan Chai North. Road P2 is a dual 2-lane primary distributor that serves both local east-west movements and the distribution of north-south traffic movements. The Road P2 alignment has been planned to run over the top of the
Trunk Road tunnel through CRIII and the HKCEC water channel, to the
connection with |
|
Benefits: The
primary distributor serves both local east-west movements and the
distribution of north-south traffic movements. The new junction with
|
|
Potential
consequences without the Project:
(i) Not able to relieve traffic
congestion · The primary distributor is important in serving both local
east-west movements and the distribution of north-south traffic
movements. Without the primary
distributor, most of the critical junctions in Wan Chai north area will have
negative reserve capacities. Most
of the traffic from the Central waterfront heading east would access to
Connaught Road Central causing the junction of |
|
·
Without the slip road
connections, the Trunk Road cannot adequately perform its function of
relieving traffic from the overloaded Connaught Road Central / (ii)
Likely environmental conditions · In the absence of project,
similar air quality conditions along the northshore areas of Wan Chai, · In the absence of the project,
the noise environment of the project area would be increased due to the
natural growth of traffic. In the presence of the project, it would help
lessen the traffic burden on · Water quality at |
Development
Alternatives |
Different
scenarios for the road networks (e.g. with and without the Road P2 and Wan
Chai slip road connections) have been examined in the Envisioning Stage -
Expert Panel Forum on Sustainable Transport Planning and Central-Wan Chai
Bypass in September 2005. Details
shall refer to the “Submission to the Expert Panel by Transport Department”
and the “Supplementary Note to the Expert Panel by Transport Department”,
which can be viewed at the HEC website:
http://www.harbourfront.org.hk/eng/content_page/envis_stage.html?s=1. The
Expert Panel recognizes the need for Road P2 and supports the provision of
slip roads at the Wan Chai area to magnify the benefits of the CWB. The Report of the Expert Panel can
also be viewed on the
|
Construction Air
Quality Impact |
Environmental
benefits of environmental protection measures recommended: During construction phase, potential air quality impacts include dust
nuisance and gaseous emissions from the construction plant and vehicles.. Mitigation measures for dust impact include four times watering a day
on the active work areas and implementation of the Air Pollution Control
(Construction Dust) Regulation and good site practices. With the implementation of the recommended control and mitigation
measures, no adverse air quality impacts are anticipated. Compensation
areas included: Not
required Population
and environmental sensitive receivers protected: Existing air sensitive receivers within |
Operational Air
Quality Impact |
Environmental benefits of environmental protection measures recommended: · No unacceptable residual traffic emission impacts are anticipated at the existing and future ASRs. |
|
Air quality inside CWB Tunnel and deckover for planned HKCEC Atrium Link would comply with standards of EPD Tunnel Air Quality Guidelines. Compensation areas included: Not required Population and environmental sensitive
receivers protected: · Existing
and planned air sensitive receivers within |
Construction Noise
Impact |
Environmental
benefits of environmental protection measures recommended: The predicted
mitigated noise levels would range from 64 to 72 dB(A) at the representative NSRs. With the implementation of quiet PME and
movable barriers under the Project and noise mitigation measures under other
concurrent Schedule 2 DPs, the noise levels at all representative NSRs would comply with the construction
noise standard. |
|
Compensation
areas included: Not required. |
|
Population
and environmental sensitive receivers protected: Noise
sensitive receivers within |
Road Traffic Noise
Impact |
Environmental
benefits of environmental protection measures recommended: Mitigated noise levels: 60 dB(A) to 87 dB(A). No direct noise mitigation measures have been proposed for DP2. Noise exceedances at the representative NSRs are due to the existing roads. The ‘new’ road noise contributions to the overall noise levels at all representative NSRs would be less than 1.0 dB(A) and the ‘new’ road noise levels would all be below the relevant noise criteria. No adverse noise impacts arising from the ‘new’ roads are predicted at any of the representative NSRs. None of the representative NSRs is eligible for consideration for indirect technical remedies. |
|
Compensation
areas included: Not required. |
|
Population
and environmental sensitive receivers protected: Noise
sensitive receivers within 300m of the project boundary. |
Water Quality Impact |
Environmental benefits of environmental protection measures recommended: Water quality impacts from land-based construction are associated with the surface runoff, effluent discharge from the site, and sewage from on-site construction workers. Impacts can be controlled to comply with the WPCO standards by implementing the recommended mitigation measures. No unacceptable residual impacts on water quality are anticipated. |
|
Potential water quality impact would be associated with surface road runoff which may be contaminated by oils leaked from passing vehicles. It is considered that impacts upon water quality will be minimal provided that the road works are designed with adequate drainage systems and appropriate oil interceptors, as required Compensation
areas included: Not required. Population
and environmental sensitive receivers protected: Seawater intakes along the waterfront of |
Waste Management
Implications |
Environmental benefits of environmental protection measures recommended: With the implementation of the recommended mitigation measures and practices, potential air, odour, noise, water quality for the handling, transportation and disposal of the identified waste arisings, no adverse environmental impacts are expected. |
|
Limited amount of refuse and debris may be unintentionally
brought from the site into the harbour during heavy rains or typhoons. Given
that the Project would not worsen the shoreline configuration and the
implementation of appropriate control measures during construction phase, it
is considered that the future quantity of refuse to be found along the
shoreline would be similar if not better than the existing situation. With
the implementation of a refuse collection system within the project area, no
insurmountable environmental impact with regard to floating refuse would be
anticipated during the construction phase, or after completion of the Project. Compensation
areas included: Not required. Population and environmental sensitive
receivers protected: Water quality, air, and noise sensitive receivers at or near the
Project site, the waste transportation routes and the waste disposal site. |
Land Contamination
Impact |
Environmental benefits of environmental protection measures recommended: No potential contaminative land uses were identified within the Study Area. As such, adverse land contamination impacts associated with the construction and operation of the Project is not expected. Compensation
areas included: Not
required. |
|
Population and environmental sensitive receivers protected: No construction worker would be affected. |
Marine Ecological
Impact |
Environmental benefits of environmental protection measures
recommended: No adverse ecological impact on marine ecology is expected. Compensation
areas included: Not
required. Population and environmental sensitive receivers protected: No marine ecological receiver would be affected. |
Landscape and Visual
Impact |
Environmental benefits of environmental protection measures recommended: ·
Under the proposed
development, approximately · Approximately 110 trees will be affected. None of these are LCSD Champion Trees, Registered Old and Valuable Trees, rare or endangered specie, all trees are common species. Approximately 1500 new trees and other proposed planting will be planted in the new waterfront and along roadside amenity areas after the new open space is built to compensate the felled trees. · During construction, substantial negative impacts on the Fenwick Pier Street Public Open Space landscape character. · However, the exiting landscape characters along the waterfront will be further enhanced by the proposed open space. Specific themes will be proposed to the waterfront from Central to Wan Chai. Therefore, the residual impacts on various waterfront landscape characters are considered as substantial positive to moderate positive. |
|
·
With implementation of
mitigation measures during construction, there will still be some moderate
negative visual impact on the VSRs in the front row of high rise buildings
along the waterfront from Central to Wan Chai. Residual impacts on VSRs further away
the |
|
· During operation, there will be substantial to moderate positive visual impact on VSRs along the new waterfront as the landscape and visual amenity are generally enhanced and strengthened by the Project. |
|
Compensation
areas included: Approximately Population
and environmental sensitive receivers protected: Existing and planned Landscape Resources ,
Landscape Character Area and VSR at and near the project site. |
Cultural Heritage
Impact |
Environmental benefits of environmental protection measures recommended: No archaeological impact due to the construction activities is not expected. Compensation
areas included: Not
required. Population and environmental sensitive receivers protected: No
archaeological resources would be affected. |
Construction
Phase
Operational
Phase
Construction
Phase
Operational
Phase
Construction
Phase
Operational Phase