a)
List
of sensitive receivers;
b)
Protection
of Environmental Sensitive Areas;
c)
Key
Environmental Problems Avoided / Environmental Outcomes;
d)
Assessment
Methodology and Criteria;
e)
Key
Construction Impacts
f)
Key
Operation Impacts
g)
Key
Mitigation Measures
h)
Residual
Impacts; and
i)
Compliance
with the guidelines and criteria of the Environmental Impact Assessment
Ordinance – Technical Memorandum (EIAO-TM)
Table 11.1 – Summary of
Environmental Assessment & Outcomes - Air Quality
|
Items |
Description |
|
Air Sensitive
Receivers (ASRs) |
In accordance with the requirements stated in Clause
3.4.2.2 of the EIA Study Brief, the Study Area for the air quality impact
assessment covered an area of 500 m from the boundary of the Project
Site. Eight (8) representative ASRs were identified and illustrated
in Figure 3.1 of the EIA Report. |
|
Protection of
Environmentally Sensitive Areas |
With the implementation of the recommended dust control measures and
adoption of good construction site practices during construction phase and
odour mitigation measures during operation phase, no adverse fugitive dust
impact or odour impact is anticipated within the Study Area and associated
ASRs. |
|
Key Environmental Issues
Avoided/ Environmental
Outcomes |
Potential impacts to the identified ASRs during
construction phase are not anticipated by strictly following the dust control
measures stipulated in the Air
Pollution Control (Construction Dust) Regulations and good site
practices. Potential odour impacts on the identified ASRs
during operation phase are not anticipated provided that odour mitigation
measures and recommendations are followed and implemented. |
|
Assessment Methodology
and Criteria |
·
The principal
legislation for the management of air quality in Hong Kong is the Air Pollution Control Ordinance (APCO) (Cap 311). The APCO Amendment was passed in July 2013
and a set of new Air Quality Objectives (AQOs) has been effective from 1
January 2014. The new AQOs were used
as the evaluation criteria for this assessment. ·
A maximum hourly TSP level of
500 mg m-3
at ASRs is also stipulated in Annex 4 of the EIAO-TM to assess potential
construction dust impacts. The
measures stipulated in the Air
Pollution Control (Construction Dust) Regulation
should also be followed to ensure that any dust impacts are minimised. ·
Annex 4 of the EIAO-TM also
stipulates that any predictive assessment of odour impact should meet 5 odour
units based on an averaging time of 5 seconds. |
|
Key Construction Impacts |
Soil excavation, material handling, truck movements
on unpaved roads and wind erosion from open stockpiling of dusty materials
within the Project Site are identified to be the potential dust generating
activities. |
|
Key Operation Impacts |
Potential odour
emission is expected from the exhaust pipe of the TSTP and the STKSTW during
operation. Potential odour nuisance
may also result from the transportation, storage and handling of sludge
produced during the sewage treatment process. |
|
Key Mitigation Measures |
Construction Phase Dust control measures
stipulated in the Air Pollution Control
(Construction Dust) Regulation will be implemented during the
construction of the Project to reduce the potential fugitive dust emissions
and also gaseous emission from construction plant. Operation Phase Deodourizing
facility using activated carbon filters and/or bio-trickling filters will be
equipped for both TSTP and STKSTW to attain the required odour removal
efficiency at exhaust. The deodorization
system would undergo maintenance annually or when the average odour removal
efficiency of deodorization facility is smaller than the required odour
removal efficiency. Ventilation system will also be provided inside the
TSTP and STKSTW to ensure adequate air exchange within the plants. Dewater sludge will be disposed of at the
landfill regularly using fully enclosed trucks to minimise potential odour
impact. |
|
Residual Impacts |
Construction Phase: No adverse residual air
quality impact is anticipated with the implementation of the mitigation
measures and good construction site practices. Operation Phase: No adverse residual air
quality impact is envisaged at all identified ASRs with the implementation of
the recommended odour control measures and proper site management practices. |
|
Compliance with EIAO-TM |
The assessment and
the impacts are acceptable and in compliance with the EIAO-TM Annexes 4 &
12 and applicable assessment standards/ criteria. |
Table 11.2 – Summary of
Environmental Assessment & Outcomes - Noise
|
Items |
Description |
|
Noise Sensitive
Receivers (NSRs) |
In accordance with the requirements stated in Clause
3.4.3.2 of the EIA Study Brief, the Study Area for the noise impact
assessment shall covered an area of 300 m from the boundary of the Project
Site. 8 representative NSRs were identified and illustrated
in Figure 4.1 of the EIA Report. |
|
Protection of
Environmentally Sensitive Areas |
The environmentally sensitive areas are protected as
a result of adoption of the environmentally friendly options and designs.
Adverse noise impacts on noise sensitive receivers within the assessment
areas have been minimized with the practicable mitigation measures
implemented. |
|
Key Environmental Issues
Avoided/ Environmental Outcomes |
The maximum number of work fronts, length of open
cut and working duration has been optimized to minimize the exceedances of
daytime construction noise criteria. |
|
Assessment Methodology
and Criteria |
· The methodology for the noise impact assessment is in
accordance with the procedures outlined in the GW-TM, which is issued under
the NCO and the EIAO-TM. ·
Using a
conservative approach, each work activity has been assumed to operate
simultaneously. Based on the construction programme, cumulative noise impact
throughout the construction phase has been assessed. |
|
Key Construction Impacts |
Potential sources of
noise impacts during the construction phase of the Project will mainly arise
from powered mechanical equipment (PME) operating at the land-based
construction work sites. No NSR was identified within 300 m from the
marine-based works area, hence the potential construction noise impacts are
expected to be minimal. |
|
Key Operation Impacts |
Potential sources of noise impacts during the
operation phase of the Project will mainly arise from fixed plant items
operating in the Project site. However, no unacceptable noise impact is
expected due to the operation of fixed plant items. |
|
Key Mitigation Measures |
Construction Phase: In view of the predicted
noise exceedances at some of the NSRs during the construction of the Project,
the following mitigation
measures have been considered: · Good construction site practice; ·
Use of quite
PME; ·
Adoption of
temporary noise barriers and movable noise barriers; and · Scheduling of PME / construction activities. Operation Phase: While no noise impact is expected due to operation of fixed plant
items, the following measures will be implemented: · All the equipment
will be fully totally enclosed inside building g structure; · Quieter equipment
should be chosen; · Include noise
levels specification when ordering new equipment items; · All openings,
including louvres for ventilation fan and machine room doors should be
oriented away from NSRs; · Silencers,
acoustic louvres or acoustic doors should be used; and · Develop and
implement a regularly scheduled equipment maintenance programme so that
equipment items are properly operated and serviced. The programme should be
implemented by properly trained personnel. |
|
Residual Impacts |
Construction Phase: · With the implementation of all practical mitigation
measures and works scheduling , no residual impacts are anticipated and
predicted noise levels at all NSRs are predicted to comply with the EIAO requirement. Operational Phase: ·
No residual
operational noise impact is anticipated. |
|
Compliance with EIAO-TM |
The assessment and the
impacts are acceptable and in compliance with the EIAO-TM Annexes 5 & 13
and applicable assessment
standards/ criteria. |
Table 11.3 – Summary of
Environmental Assessment & Outcomes – Water Quality
|
Items |
Description |
|
Sensitive Receivers
(SRs) |
The following SRs have been
identified: ·
Fisheries Sensitive
Receivers Fish
Culture Zones at Sha Tau Kok and two of its potential relocation sites, Ap
Chau, Kat O, O Pui
Tong, Sai Lau Kong and Wong Wan ·
Ecological
Sensitive Receivers Seagrass bed Horseshoe crab at coastline off STKSTW, off Pak Hok Lam,
off Nga Yiu Tau, A Chau and off Luk Keng Mangrove stand at coastline off Nga Yiu
Tau, off Wu Shek Kok, off Tai Wan, off Luk Keng, off Kuk Po, Kei Shan Tsui,
Tai Sham Chung, So Lo Pun, Pak Kok Wan, Yan Chau Tong Marine Park and Ngau
Shi Wu Wan Marine Park at Yan Chau Tong |
|
Protection of
Environmentally Sensitive Areas |
Design measures
have been included to minimize the potential water quality impact from
outfall and diffuser construction.
Selection of outfall location and improvement on effluent quality are
taken into account in the design to minimize the potential water quality
impact from the operation of the expanded STKSTW. With the implementation of the suggested
mitigation measures, full WQO compliance is predicted at identified WSRs Changes
in DO level due to Project operation are limited though. Modelling results also indicates TIN level
is predicted to improve significantly near the existing outfall |
|
Key Environmental Issues
Avoided/ Environmental
Outcomes |
·
Non-dredge trenchless method
would be adopted for outfall construction such that potential water quality
impact and waste generation from marine dredging of outfall alignment can be
avoided. ·
Removal of sediment at
outfall diffuser would be conducted within fully drained water-tight
cofferdam. Potential water quality
impact from conventional marine dredging for outfall diffuser construction
would be avoided. ·
Expansion
of treatment capacity and improvement in effluent quality allows more
population be served within the sewage catchment and reduce untreated sewage
from entering local rivers or marine waters. |
|
Assessment Methodology
and Criteria |
·
The potential impacts
due to the construction and operation of the Project and associated
developments were assessed following the EIAO-TM Annex 6 guidelines and the
impacts evaluated based on the criteria in EIAO-TM Annex 14. ·
Impacts due to the
dispersion of fine sediment in suspension during the construction of the
submarine pipelines have been assessed using computational modelling (Delft3D
PART). ·
The simulation of
operation impacts on water quality has also been studied by means of
computational modelling (Delft3D WAQ and CORMIX). The models have been used
to simulate the effects of the physical presence of hydrodynamic regime, flushing
and sedimentation patterns, and water quality changes. |
|
Key Construction Impacts |
Non-dredge trenchless
construction method has been adopted for outfall alignment. Removal of sediment at outfall diffuser
would be conducted within fully drained water-tight cofferdam as well. Potential disturbance from installation and
removal would be the major source of water quality impact from marine
construction. The water quality
modelling works have indicated that the installation and removal of
sheetpiles can proceed at the recommended working rates without causing
unacceptable impacts to water quality sensitive receivers. ·
Suspended
Solids (SS): The majority of SS
elevations in water have been predicted to remain within relatively close
proximity to the dredging works and, as such, the majority of sediment has
been predicted to settle within relatively close proximity to the works
areas. Thus, no unacceptable impacts are expected to be posed by the works. ·
Water
Quality (Dissolved Oxygen, Nutrients, and Heavy Metals):
The dispersion of sediment due to dredging is not expected to impact the general
water quality of the receiving waters. Effects will be transient, localised
in extent, of small magnitude and compliant with applicable standards. Thus,
no unacceptable impacts are expected to be posed by the works. ·
Other
Discharges: Land based construction
activities, vessel discharges and contaminants are not predicted to cause
unacceptable impacts to the water quality sensitive receivers. |
|
Key Operation Impacts |
The discharge of
treated effluent from the expanded STKSTW is the main environmental concern
for the Project operation. Results of
water quality modelling indicate that there will be a general improvement in
water quality at the currently stressed inner Starling Inlet during the
operation of the expanded STKSTW as a result of improvement in effluent
quality and relocation of discharge outfall.
Most of the WSRs within the Starling Inlet are predicted to benefit
from the operation the expanded STKSTW.
Significant improvement of TIN level is predicted at WSRs near the
existing outfall. On the other hand,
some WSRs located on the southern
coast of the Starling Inlet as well as WSRs which are close to the new
discharge outfall are predicted to be affected by the expanded STKSTW. Yet the predicted changes are expected to
be limited and within the relevant criteria of WQO. No non-compliance to WQO criteria is
predicted. |
|
Key Mitigation Measures |
Appropriate
preventive and mitigation measures are recommended. Construction methods that cause fewer
disturbances to marine sediment are adopted, such as non-dredge trenchless
construction of outfall alignment and cofferdam construction of outfall
diffuser structure. Environmental
monitoring and audit is recommended to ensure the proper implementation of
these measures. |
|
Residual Impacts |
Construction Phase: ·
No adverse residual
construction impact on water quality is anticipated. ·
No additional non-compliance to WQO from the
discharge of treated effluent from the TSTP is anticipated as the total
pollution loading of TSTP would remain the same as the baseline scenario Operational Phase: ·
Modelling
assessment for operation phase effluent discharge indicated that no non-compliance
to WQO from the discharge of treated effluent from the expanded STKSTW. |
|
Compliance with EIAO-TM |
The assessment and
the impacts are acceptable and in compliance with the EIAO-TM Annexes 6 &
14 and applicable assessment standards/ criteria. |
Table 11.4 – Summary of
Environmental Assessment & Outcomes – Waste Management Implication and Land
Contamination
|
Items |
Description |
|
Key
Environmental Issues Avoided/ Environmental
Outcomes |
Potential
project layouts, construction design and methods and reuse of excavated
materials, were examined on the basis of their potential environmental
impacts. The preferred alternatives have led to the reduction in the amount
of waste expected to be produced and, therefore, have brought about an
overall reduction in waste management impacts. The
proposed works areas were examined for potential contaminated land issue from
past and present land uses and activities. |
|
Assessment
Methodology and Criteria |
The potential
environmental impacts associated with the handling and disposal of waste
arising from the construction and operation of this Project are assessed in
accordance with the criteria presented in Annexes 7
and 15 of
the EIAO-TM: · Estimation of the types and
quantities of the wastes to be generated; ·
Assessment of the secondary environmental impacts due to the
management of waste with respect to potential hazards, air and odour
emissions, noise, wastewater discharges and traffic; and ·
Assessment of the potential impacts on the capacity of waste
collection, transfer and disposal facilities. Land contamination is assessed
in accordance with Annex 19 of the EIAO-TM and the relevant EPD’s Practice
Guide, Guidance Note and Guidance Manual, consisting of: ·
Desk-top review of existing and historical information; ·
Interpretation of existing and historical aerial photographs; ·
Review of Government records; and · Site walkover to verify
collected information. |
|
Key
Construction Impacts |
The
key potential impacts during the construction phase are related to wastes
generated from construction of submarine outfall and land-based construction
works. All the wastes produced during the construction phase will be disposed
of accordingly to their nature and relevant regulations, avoiding any
potential adverse impact. The
review and site walkover indicated no contaminated land in the proposed works
area. |
|
Key
Operation Impacts |
Dewatered
sludge, screenings, general refuse and chemical waste will be produced during
the operation phase. The potential environmental impacts associated with
waste storage, handling, collection, transport and disposal will meet the
criteria specified in the EIAO-TM, thus no unacceptable operational waste
management impact is anticipated. The
operation of the TSTP will not require use of large amount of chemicals or
fuels that may potentially cause land contamination. No contaminated land is
expected for the demolition of the TSTP after the expanded STKSTW comes into
operation. |
|
Key
Mitigation Measures |
A
Environmental Management Plan (EMP) will be devised which incorporates
mitigation measures that have been proposed to avoid or reduce potential
adverse environmental impacts associated with handling, collection and
disposal of waste arising from the construction and operation of this
Project. |
|
Residual
Impacts |
With the implementation of the recommended mitigation measures, in particular the establishment and implementation of the EMP, no residual impacts are anticipated from the construction and operation of this Project. |
|
Compliance
with EIAO-TM |
The
assessment and the impacts are acceptable and in compliance with the EIAO-TM
Annexes 7 & 15 and applicable assessment standards/ criteria. |
Table 11.5 – Summary of Environmental Assessment & Outcomes –
Ecological Impact
|
Items |
Description |
|
Protection of
Environmentally Sensitive Areas |
The A Chau Site of Special
Scientific Interest (SSSI) and coastal habitats including
mangrove stands, sandflats and mudflats at Sha Tau Kok Hoi are the recognized
ecologically important / sensitive sites located within the Study Area. These ecological sensitive habitats are
located outside of the project site. |
|
Key Environmental Issues
Avoided/ Environmental Outcomes |
·
Disturbance to the key ecological sensitive receivers such as the A
Chau SSSI and coastal habitats including mangrove stands, sandflats and
mudflats at Sha Tau Kok Hoi has been avoided by locating
the project site away from these areas. ·
Potential impacts on the construction noise have been avoided for
Night Roosting Site for Great Egrets. ·
Potential impacts on waterbirds and ardeids (i.e. on the mudflats or
in the open waters, as well as the Night Roosting Site for Great Egrets) on
the existing outfall are not expected, due to the grouting or foam concreting
works being confined within the STKSTW. ·
Potential project layouts, construction design and methods were
examined on the basis of their potential environmental impacts. The adopted layout has avoided construction
impacts to marine ecological resources. ·
Impacts to marine ecology have been reduced through the adoption of
trenchless installation technique for the submarine outfall. The outfall is also proposed to be located
in more offshore, open waters to enhance dilution and dispersion of
effluent. This results in less adverse
effect on water quality of surrounding areas and thus to the marine
ecological resources. |
|
Assessment Methodology and
Criteria |
· A literature review was supplemented by a programme of field surveys that covered terrestrial and marine assemblages and habitats. ·
The potential impacts due to the construction and operation of the
proposed Project were assessed following the EIAO-TM Annex 16 guidelines and
the impacts evaluated based on criteria in EIAO-TM Annex 8 and Guidance Notes. |
|
Key Construction Impacts |
·
Direct loss of habitats and vegetation removal within the footprint
of the land-based works area, including potential reduction of species
abundance/diversity, loss of feeding grounds, reduction of ecological
carrying capacity. ·
Direct disturbances to benthic habitat within the marine works area. ·
Potential disturbance to the recognized site of conservation
importance at the A Chau SSSI. ·
Potential disturbance to species of conservation interest. ·
Habitat fragmentation and isolation, including potential restriction
of wildlife utilisation of the area (i.e. transit, feeding and roosting)
especially for those inactive/ less mobile/ habitat-specific wildlife
nesting/inhabiting the habitats, and degradation of habitat quality/
ecological function. ·
Physical disturbance to the surrounding habitats and associated
wildlife due to noise and increased human activities, especially in terms of
the Night Roosting Site for the Great Egrets. ·
Potential indirect impact, potential changes in the water quality,
hydrodynamics properties, sedimentation hydrology. |
|
Key Operation Impacts |
·
Perturbations to key water quality parameters from the effluent discharge
at the diffuser of the proposed submarine outfall at the mouth of Starling
Inlet. |
|
Key Mitigation Measures |
·
Avoid direct and indirect impacts to ecologically sensitive habitats. ·
To avoid/minimize the potential disturbance on the Night Roosting
Site for Egret. If the presences of Egrets are confirmed to be continuing
their usage before the construction activities, no work shall be undertaken
within an area of 100 m from the Night Roosting Site from 16:00 to 07:00 of
the following day (as illustrated in Section
2.3.2 of Annex 7A). In addition,
strong artificial lighting should not be used in the area at night to avoid
disturbance to the roosting ardeids. Clear
signs should be erected on site to alert all site staff and workers about the
requirement. ·
The alignment chosen for the submarine outfall is away from key
ecological sensitive habitats. ·
The use of trenchless techniques during the installation of the
submarine outfall will reduce the severity of perturbations to water quality
and hence allow compliance with the impact assessment criteria at sensitive
receivers. ·
The mitigation measures designed to mitigate impacts to water quality
to acceptable levels (compliance with assessment criteria) are also expected
to mitigate impacts to marine ecological resources. |
|
Residual Impacts |
No adverse residual construction and operational
ecological impact is anticipated. |
|
Compliance with EIAO-TM |
The assessment and the residual impacts are
acceptable and in compliance with the EIAO-TM Annexes 8 & 16 and
applicable assessment standards/criteria. |
Table 11.6 – Summary of Environmental Assessment & Outcomes –
Fisheries Impact
|
Items |
Description |
|
Protection of Environmentally Sensitive Areas |
Fisheries sensitive receivers including fish culture
zones at Sha Tau Kok, Ap Chau, Kat O, O Pui Tong, Sai Lau Kong and Wong Wan,
recognized spawning and nursery ground of commercial fisheries resources at
northeast water and artificial reefs at Yan Chau Tong Marine Park and O Pui
Tong have been identified; however, the assessment of water quality impacts
demonstrated that these areas will not be significantly affected. |
|
Key Environmental Issues Avoided/ Environmental Outcomes |
·
Potential project layouts,
construction and operation design and methods were examined on the basis of
their potential impacts to fisheries. ·
Impacts to fisheries have been
reduced through the adoption of trenchless installation technique for the
submarine outfall. The outfall is also
proposed to be located in more offshore, open waters to enhance dilution and
dispersion of effluent. This results
in less adverse effect on water quality of surrounding areas and thus to the
fisheries resources. |
|
Assessment Methodology and Criteria |
·
A literature review was
conducted to establish the fisheries importance of the area surrounding the
proposed Project. ·
The potential impacts due to
the construction and operation of the Project were assessed following the EIAO-TM
Annex 17 guidelines and the impacts evaluated based on the criteria in EIAO-TM
Annex 9. |
|
Key Construction Impacts |
·
Direct disturbances of
fisheries habitat and fishing ground; and, ·
Perturbations to key water
quality parameters. |
|
Key Operation Impacts |
The change in the hydrodynamic regime and water quality due to the expanded
STKSTW (operation scenario). |
|
Key Mitigation Measures |
·
The mitigation measures
designed to mitigate impacts to water quality to acceptable levels
(compliance with assessment criteria) are expected to mitigate impacts to
fisheries resources. ·
Construction impacts to
fisheries resources and fishing operations have largely been avoided through
the planning and design of the marine works (e.g. adoption of trenchless
method, location of the outfall diffuser to allow better mixing, and
optimisation of project construction schedule). No fisheries-specific mitigation measures
are required during construction. ·
Unacceptable operation phase
impacts are not expected. No
additional fisheries-specific mitigation measures or compensation are
required during operation. |
|
Residual Impacts |
Impacts to fisheries
resources, habitats and fishing operations during construction and operation
phase are considered to be within acceptable level. Given the compliance of water quality
standard prior to the discharge at the submarine outfall, the magnitude of
residual impact is considered to be within acceptable levels given the small
size and low fisheries importance of the area being disturbed. |
|
Compliance with EIAO-TM |
The assessment and the impacts are acceptable and in
compliance with the EIAO-TM Annexes 9 & 17 and applicable assessment
standards/ criteria. |
Table 11.7 – Summary of Environmental Assessment & Outcomes –
Landscape and Visual
|
Items |
Description |
|
Visually Sensitive
Receivers (VSRs), Landscape Resources (LRs) and Landscape Character Areas
(LCAs) |
A
total of 16 VSRs, 55 LRs and 7 LCAs were identified. |
|
Key Environmental Issues
Avoided/ Environmental Outcomes |
The
layout as shown in Figure 2.1 is a reduced footprint
which keeps the proposed STKSTW within the existing STKSTW site area to avoid
encroachment into the adjacent vegetated areas. |
|
Protection of Environmentally
Sensitive Areas |
The
project is proposed and will be restricted on existing urban developed areas.
Impacts on landscape and visually sensitive areas will be avoided. |
|
Assessment Methodology and
Criteria |
The methodology of the LVIA
was based on Annexes 10 and 18 in the EIAO-TM under the EIA Ordinance and
associated Guidance Notes. ·
The landscape assessment considered the impact of the proposed
development on the existing landscape resources and landscape characters
within 500 m of the development site. ·
The visual assessment examined the impact of the proposed development
on the existing views and the visual amenity, from representative VSRs within
the ZVI. ·
In order to illustrate the visual impacts of the proposed project,
photomontages were prepared from representative viewpoints compare the
existing conditions with the view after construction. The residual impacts
are evaluated qualitatively, in accordance with the requirements of Annex 10
of the EIAO-TM. |
|
Key Construction Impacts |
Sources of construction
impacts will be: Major Works Items: · Site clearance works; ·
Removal of existing trees on site; ·
Demolishment of existing STKSTW; ·
Construction works for a TSTP /a new STKSTW; ·
Presence of incomplete structures; ·
Importation and storage of construction equipment and plant; · Indirect dust and water
quality disturbance from construction activities Minor Works Items: · Demolishment of existing
STKSPS; ·
Decommissioning of the existing rising mains ·
Construction of a new gravity sewer ·
Indirect dust and water quality disturbance from construction
activities |
|
Key Operation Impacts |
Sources of operational
phase landscape impact will be: ·
Presence of a new STKSTW in the landscape. |
|
Key Mitigation Measures |
Construction Phase
Mitigation Measures: · CM1 – Preservation of Existing
Trees (A total of 108 existing trees are proposed to be retained) · CM2 -Proper Control of Site
Construction Activities Operation Phase Mitigation
Measures: · OM1 – Suitable design of
the proposed STKSTW ·
OM2 - Amenity / Compensatory Planting (31 trees are proposed to compensate the loss of 18 trees) ·
OM3 - Amenity enhancement (amenity enhancement includes roof greening and vertical greening) |
|
Residual Impacts |
No significant adverse
residual impacts have been identified. The Landscape and Visual Mitigation
Measures proposed will help to mitigate the impacts on the LCAs, LRs and
VSRs. The overall landscape and visual impacts are considered acceptable with
mitigation measures. |
|
Compliance with EIAO-TM |
The assessment and the
impacts are acceptable and in compliance with the EIAO-TM Annexes 10 & 18
and applicable assessment standards/ criteria. |
Table 11.8 – Summary of Environmental Assessment & Outcomes –
Cultural Heritage
|
Items |
Description |
|
Built
Heritage Items |
A total number of
11 and 27 historic buildings were identified in Ha Tam Shui Hang and Sha Tau
Kok respectively. No declared monuments identified. |
|
Protection
of Environmentally Sensitive Areas |
The Cultural
Heritage Impact Assessment (CHIA) confirmed that the Project will not cause
impact of any kind to the identified historic buildings. Alternative
construction method recommended to minimize impact to nearby Tin Hau Temple. |
|
Assessment
Methodology and Criteria |
The methodology of the CHIA was based on Annexes 19
in the EIAO-TM under the EIA Ordinance, Appendix I-1 of the EIA Study Brief and
associated Guidance Notes. |
|
Key
Construction Impacts |
Because of the
distance between the identified historic buildings and the Project sites, it
is believed that the proposed Project will not cause any impact from any
perspective. Alternative construction method recommended to minimize impact
to nearby Tin Hau Temple. |
|
Key
Operation Impacts |
No operation
impact is anticipated. |
|
Key
Mitigation Measures |
·
Trenchless excavation in the vicinity of the Tin Hau
Temple with buffer of 10m between works area for open cut section and the
Temple. ·
Condition survey and vibration impact assessment
during construction. ·
Precautionary and protective measures during
construction. |
|
Residual
Impacts |
The proposed
Project will not cause any impact from any perspective. |
|
Compliance
with EIAO-TM |
The assessment and
the impacts are acceptable and in compliance with the EIAO-TM Annexes 19 and
applicable assessment standards/ criteria. |
a)
Improve treatment to produce effluent with better
quality
b)
Provide more treatment capacity within the existing
plant site
c)
Cover the treatment facilities and provide odour
treatment to improve air quality
d)
Incorporate environmental enhancements in the new
treatment facilities, including renewable energy, energy-efficient electrical
and mechanical equipment, greening, water saving measures, etc.
e)
Locate the discharge point of the new submarine away
from sensitive receivers, including the fish culture zones and the identified
species of conservation importance
f)
Demolish STKSPS to make the land available for other
beneficial purposes
Membrane Bioreactor Process as Treatment
Process
Demolition of STKSPS
Lay the new sewer along Shun Hing Street
Discharge effluent at Ah Kung Au
Trenchless technique by HDD for
construction of submarine outfall
Precautionary measures for minimizing
emergency discharge