2.1 General
Description of the Project
4.2 Environmental
Management Plan
4.4 Construction
Method Statement
5.5 Laboratory
Measurement / Analysis
6.3 Noise
Monitoring Parameters
7.3 Water
Monitoring Parameters
7.5 Laboratory
Measurement / Analysis
8 Waste Management
Implications
9.2 Proposed
Site Investigation for Potentially Contaminated Areas
9.3 Submission
Requirements of CAP, CAR, RAP and RR
12 Landscape and Visual Impact
13 Impact on Cultural Heritage
(Archaeology)
14 Impact on Cultural Heritage
(Built Heritage)
15.3 Choice
of Construction Method
16.2 Baseline
Monitoring Report
16.3 Monthly
Monitoring Reports
16.4 Final
EM&A Review Reports
16.6 Interim
Notifications of Environmental Quality Limit Exceedances
Appendix 2.1 Tentative Construction Programme
Appendix 3.1 Project Organization for Environmental Works
Appendix 5.1 Sample Data Sheet for TSP Monitoring
Appendix 6.1 Sample Data Sheet for Construction Noise Monitoring
Appendix 15.1 Proactive Environmental Protection Proforma
Appendix 16.1 Sample Template for Interim Notification
Figures
Figure 2.1.1 Project Location Plan at Sandy Ridge Cemetery
Figure 2.1.2 Project Location Plan at Lin Ma Hang Road
Figure 2.1.3 Location of Barging Point
Figure 2.1.4 Locations of Designated Projects
Figure 5.1.1 Locations of Construction Dust Monitoring (Sheet 1 of 4)
Figure 5.1.2 Locations of Construction Dust Monitoring (Sheet 2 of 4)
Figure 5.1.3 Locations of Construction Dust Monitoring (Sheet 3 of 4)
Figure 5.1.4 Locations of Construction Dust Monitoring (Sheet 4 of 4)
Figure 6.2.1 Locations of Proposed Construction Noise Monitoring (Sheet 1 of 4)
Figure 6.2.2 Locations of Proposed Construction Noise Monitoring (Sheet 2 of 4)
Figure 6.2.3 Locations of Proposed Construction Noise Monitoring (Sheet 3 of 4)
Figure 6.2.4 Locations of Proposed Construction Noise Monitoring (Sheet 4 of 4)
Figure 6.3.1 Locations of Proposed Road Traffic Noise Monitoring (Sheet 1 of 5)
Figure 6.3.2 Locations of Proposed Road Traffic Noise Monitoring (Sheet 2 of 5)
Figure 6.3.3 Locations of Proposed Road Traffic Noise Monitoring (Sheet 3 of 5)
Figure 6.3.4 Locations of Proposed Road Traffic Noise Monitoring (Sheet 4 of 5)
Figure 6.3.5 Locations of Proposed Road Traffic Noise Monitoring (Sheet 5 of 5)
Figure 7.1.1 Water Quality Monitoring Locations
Figure 13.1.1 Area Required Archaeological Watching Brief
Figure 14.1.1 Location of Built Heritage Resources – Sandy Ridge (Sheet 1 of 7)
Figure 14.1.2 Location of Built Heritage Resources – Sandy Ridge (Sheet 2 of 7)
Figure 14.1.3 Location of Built Heritage Resources – Sandy Ridge (Sheet 3 of 7)
Figure 14.1.4 Location of Built Heritage Resources – Sandy Ridge (Sheet 4 of 7)
Figure 14.1.5 Location of Built Heritage Resources – Sandy Ridge (Sheet 5 of 7)
Figure 14.1.6 Location of Built Heritage Resources – Sandy Ridge (Sheet 6 of 7)
Figure 14.1.7 Location of Built Heritage Resources – Sandy Ridge (Sheet 7 of 7)
Figure
14.1.8 Location of Built Heritage
Resources – Lin Ma Hang Road (Sheet 1 of 2)
Figure
14.1.9 Location of Built Heritage
Resources – Lin Ma Hang Road (Sheet 2 of 2)
1.1.1.1 As stipulated in the 2010-11 Policy Agenda, the Administration will identify suitable sites for columbarium development across the territory and conduct technical feasibility studies of shortlisted sites to increase supply of columbarium. The Administration will continue to review the provision of cemeteries, columbaria and crematoria facilities and strive to provide more facilities to meet future demand.
1.1.1.2 With a growing and aging population in Hong Kong, the number of deaths and the corresponding number of cremations have been rising gradually every year, resulting in an increasing public demand for columbarium facilities. Based on past data, the average annual numbers of deaths and cremations in the next 20 years (i.e. from 2014 to 2033) are estimated to be about 54,000 and 51,000 respectively. Upon completion of the latest reprovisioning projects of Wo Hop Shek and Cape Collinson Crematoria by late 2015, the total annual capacity of all public cremators will be increased from 38,000 sessions to 53,000 sessions. This will sufficiently meet the cremation demand up to around 2024. There is genuine need to construct new crematoria at Sandy Ridge Cemetery to address the demand beyond 2024. As for columbarium, the supply of public niches is uncertain after the completion of the Diamond Hill Columbarium extension, the new public columbarium at Kiu Tau Road in the Wo Hop Shek Cemetery and the Cheung Chau Cemetery extension in 2012 and 2013 providing about 1,500, 43,700 and 1,000 respectively of which allocation of niches would be largely completed in mid 2015. Hence, there is a need to construct new columbarium facilities.
1.1.1.3 The Sandy Ridge Cemetery is one of the 24 potential sites for columbarium development in 18 districts announced in three batches in July 2010, December 2010 and April 2011 respectively. Furthermore, it is planned to provide synergistic one-stop services at the Sandy Ridge Cemetery by including at least a funeral parlour and a visitor service centre so as to maximise the convenience to the public. It is hoped that this project will set a new benchmark for the public C&C facilities and services in terms of its functional one-stop services, state-of-the art design incorporating artistic elements of aesthetic appeal where appropriate, greening and landscaping, user-friendly access for visitors and serene surrounding environment. It will be a place where those lost loved ones can rest in eternal peace in a dignified manner, and where family members, relatives and friends can part with and mourn for their loved ones in reasonable privacy, and where visitors will find it pleasant to stay to admire the landscape and the greenery.
1.1.1.4 The Sandy Ridge Cemetery is under the management of Food and Environmental Hygiene Department (FEHD) and is located between Lo Wu Boundary Control Point (BCP) and Man Kam To BCP. To the north across Shenzhen River are the residential and commercial areas of Shenzhen. To the east are Man Kam To BCP and San Uk Ling (Indigenous Village). To the south are rural settlements of Sha Ling and existing Government, Institution or Community facilities including the Border District Police Headquarters. To the west are MTR Lo Wu Station, Lo Wu BCP and the hilly terrain of Tai Shek Mo west of the Ng Tung River.
1.1.1.5 In March 2011, Food and Hygiene Bureau (FHB) engaged Civil Engineering and Development Department (CEDD) to conduct a feasibility study on the site formation and associated infrastructural works for the development of columbarium facilities providing at least 200,000 inches, a crematorium with 10 cremators, a funeral parlour with 30 service halls and a visitor service centre at Sandy Ridge Cemetery under Agreement No. CE 32/2010 (CE). The feasibility study was substantially completed in September 2012.
1.1.1.6 It has been identified in the feasibility study that some elements in the Project are designated projects under Schedule 2 of the Environmental Impact Assessment Ordinance (EIAO) and require EPs prior to their construction and operation. The Project Profile (No. PP-482/2013) was submitted by CEDD to Environmental Protection Department (EPD) for an Environmental Impact Assessment (EIA) Study Brief under Section 5(1)(a) of the EIAO on 18 February 2013. The EIA Study Brief (EIA Study Brief No.: ESB-257/2013) was formally issued by EPD on 26 March 2013.
1.1.1.7 On 28 June 2013, CEDD commissioned Ove Arup & Partners Hong Kong Limited (Arup) under Agreement No. CE 1/2013 to provide consultancy services in respect of Site Formation and Associated Infrastructural Works for Development of Columbarium, Crematorium and Related Facilities at Sandy Ridge Cemetery – Design and Construction (The Assignment). This consultancy also includes the compilation of an EIA Report to fulfil the relevant legislative requirements.
1.1.1.8 Subsequent to the issue of the EIA Study Brief No. ESB-257/2013 dated March 2013, the traffic and transport arrangement has been reviewed. In addition to the road widening works at Choi Yuen Road, road widening works along Lin Ma Hang Road are also required within the adjacent areas at Sandy Ridge. Hence, given all these changes, a new Project Profile (PP-503/2014) was submitted to EPD on 13 March 2014. The EIA Study Brief No. 271/2014 was issued by EPD on 23 April 2014.
1.2.1.1
The purposes of this
Environmental Monitoring and Audit (EM&A) Manual are to :
·
Guide the
set up of an EM&A programme to ensure compliance with the EIA
recommendations;
·
Specify
the requirements for monitoring equipment;
·
Propose
environmental monitoring points, monitoring frequency etc;
·
Propose
Action and Limit Level; and
·
Propose
Event and Action Plan.
1.2.1.2 This Manual outlines the monitoring and audit programme for the construction and operation of the proposed C&C facilities and provides systematic procedures for monitoring, auditing and minimising environmental impacts.
1.2.1.3 Hong Kong environmental regulations and the Hong Kong Planning Standards and Guidelines (HKPSG) have served as environmental standards and guidelines in the preparation of this Manual. In addition, this EM&A Manual has been prepared in accordance with the requirements stipulated in Annex 21 of the Technical Memorandum on the EIA Process (TM-EIAO).
1.2.1.4 This Manual contains the following information:
·
Responsibilities
of the Contractor, the Engineer or Engineer’s Representative (ER),
Environmental Team (ET), and the Independent Environmental Checker (IEC) under
the context of EM&A;
·
Project
organization for the EM&A works;
·
The basis
for, and description of the broad approach underlying the EM&A programme;
·
Details of
the methodologies to be adopted, including all laboratories and analytical
procedures, and details on quality assurance and quality control programme;
·
The
rationale on which the environmental monitoring data will be evaluated and
interpreted;
·
Definition
of Action and Limit Levels;
·
Establishment
of Event and Action Plans;
·
Requirements
for reviewing pollution sources and working procedures required in the event of
non-compliance with the environmental criteria and complaints; and
·
Requirements
for presentation of environmental monitoring and audit data and appropriate
reporting procedures.
1.2.1.5 For the purpose of this manual, the ER shall refer to the Engineer as defined in the Construction Contract, in cases where the Engineer’s powers have been delegated to the ER, in accordance with the Construction Contract. The ET leader, who shall be responsible for and in charge of the ET, shall refer to the person delegated the role of executing the environmental monitoring and audit requirements.
2.1
General
Description of the Project
2.1.1.1 Section 2 of the EIA Report has described the approaches adopted to avoid and minimise various environmental impacts throughout the design process. The final design has therefore been taken forward as the basis for this EIA to demonstrate that all statutory requirements under EIA Study Brief (ESB-271/2014) and the Environmental Impact Assessment Ordinance (EIAO) are complied with. A brief summary of key elements of the Project is given below:
|
Area |
Proposed
Works |
|
Works Within Study Area |
·
Site formation of about 8ha of land for
proposed C&C Facilities (including the proposed pick-up and drop-off area
for shuttle buses). |
|
|
·
Widening of the existing Sha Ling Road (about
900m) - from existing 3m wide to a 7.3m wide single two-lane carriageway,
including its associated noise barriers. |
|
|
·
Construction of internal roads for
C&C Facilities. |
|
|
·
Widening of the existing Lin Ma Hang
Road (about 1.4km long) – from existing 6m wide to a 7.3m wide single
two-lane carriageway, including its associated noise barriers. |
|
|
·
Construction of a new road (about 600m)
including a section of viaduct connecting platform for Crematorium and Man
Kam To Road. |
|
|
·
Construction of the pick-up and drop-off
point at Man Kam To Road. |
|
Outside the Columbarium / Crematorium Site |
·
Temporary pick-up
and drop-off points of shuttle buses for grave-sweepers
during festive periods at MTR Kwu Tung Station,
Sheung Shui Landmark North Public Transport Interchange, MTR Fanling Station,
and layby at Pak Wo Road near Flora Plaza. ·
Necessary landscaping, sewerage,
waterworks and utility works for the proposed development along Man Kam To
Road. ·
Barging Point at Siu Lam. |
2.1.1.2 The location plans for the proposed development are shown in Figures 2.1.1 to 2.1.3. The plan for the proposed land platform for the C&C facilities at Sandy Ridge Cemetery is shown in Figure 2.1.1, and that for the proposed road widening work along Lin Ma Hang Road is shown in Figure 2.1.2 and the barging point at Siu Lam is shown in Figure 2.1.3. It should be noted that the Crematorium is a separate Schedule 2 designated project and hence the respective project proponent would conduct a separate EIA Report for submission under the EIAO.
2.2.1.1 The Project comprises the following which are classified as Designated Projects (DPs) as per Schedule 2, Part I of the EIAO:
·
Item A.8 – A road or railway
bridge more than 100m in length between abutments; and
·
Item I.1(b)(vii) – A drainage
channel or river training and diversion works which discharges or discharge
into an area which is less than 300m from the nearest boundary of an existing
or planned conservation area.
2.2.1.2 One of the new road sections leading from Man Kam To Road up to the platform of the Project comprises of a viaduct section of approximately 300m long. Both ends of the viaduct would need to be in a form as abutments. Since the length between the abutments is more than 100m, it will be a DP under Item A.8 of Schedule 2, Part I of EIAO.
2.2.1.3
The Conservation Area (CA) at Yuen Leng Chai is located approximately
45m north west of the proposed Project and there is a vertical difference
between the proposed platform and the CA.
Hence, a portion of the surface run-off from the proposed platform will
be drained into this CA. Hence, it will be a DP under Item I.1(b)(vii) of Schedule 2, Part 1
of EIAO.
2.2.1.4
The locations of the above
DPs under the
Project are shown in Figure 2.1.4.
2.3.1.1 The C&C facilities that would interface with other major projects and has the potential to lead to cumulative impacts. Expected concurrent / interfacing projects include:
·
Operation of the Crematorium at
Sandy Ridge;
·
Development of Organic Waste Treatment
Facilities, Phase 2 (OWTF);
·
Police Facilities in Kong Nga
Po;
·
Widening of Lin Ma Hang Road;
·
Liantang / Heung Yuen Wai
Boundary Control Point and Associated Works;
·
Development of Lok Ma Chau Loop
(LMC Loop);
·
North East New Territories New
Development Area (NENT NDA); and
·
Widening of Tolo / Fanling
Highway between Island House Interchange and Fanling.
2.4.1.1 According to the latest programme, the construction of the C&C facilities is to commence in 2017. The construction works would take about 5 years and the target commissioning date is in 2022. The tentative construction programme is presented in Appendix 2.1.
3.1.1.1
The proposed project organization
and lines of communication with respect to environmental protection works are
shown in Appendix 3.1.
3.1.1.2 The leader of the ET shall be an independent party from the Contractor and has relevant professional qualifications, or have sufficient relevant EM&A experience subject to approval of the ER.
3.1.1.3 The responsibilities of respective parties are:
The Contractor
· Implement the EIA recommendations and requirements;
· Employ an ET to undertake monitoring, laboratory analysis and reporting of environmental monitoring and audit;
· Provide assistance to ET in carrying out monitoring and auditing;
· Submit proposals on mitigation measures in case of exceedances of Action and Limit Levels in accordance with the Event and Action Plans;
· Implement measures to reduce impact where Action and Limit Levels are exceeded; and
· Adhere to the agreed procedures for carrying out compliant investigation.
Environmental Team
·
Set up all
the required environmental monitoring stations;
·
Monitor
various environmental parameters as required in the EM&A Manual;
·
Analyse
the environmental monitoring and audit data and review the success of EM&A
programme to cost-effectively confirm the adequacy of mitigation measures
implemented and the validity of the EIA predictions and to identify any adverse
environmental impacts arising;
·
Carry out
site inspection to investigate and audit the Contractors’ site practice,
equipment and work methodologies with respect to pollution control and environmental
mitigation, and take proactive actions to pre-empt problems;
·
Audit and
prepare audit reports on the environmental monitoring data and site
environmental conditions;
·
Report on
the environmental monitoring and audit results to the IEC, Contractor, the ER
and EPD or its delegated representative;
·
Recommend
suitable mitigation measures to the Contractor in the case of exceedance of
Action and Limit Levels in accordance with the Event and Action Plans;
·
Undertake
regular on-site audits / inspections and report to the Contractor and the ER of
any potential non-compliance;
·
Follow up
and close out non-compliance actions; and
·
Adhere to the procedures for carrying out environmental complaint
investigation.
Engineer or Engineer’s
Representative
·
Supervise
the Contractor’s activities and ensure that the requirements in the EM&A
Manual are fully complied with;
·
Inform the
Contractor when action is required to reduce impacts in accordance with the
Even and Action Plans;
·
Assist the Project Proponent in employing an IEC to
audit the results of the EM&A works carried out by the ET;
·
Comply
with the agreed Event Contingency Plan in the event of any exceedance; and
·
Adhere to the procedures for carrying out complaint investigations.
Independent
Environmental Checker
·
Review the
EM&A works performed by the ET (at not less than monthly intervals);
·
Audit the
monitoring activities and results (at not less than monthly intervals);
· Validate and confirm the accuracy of monitoring results, monitoring equipment, monitoring locations, monitoring procedures and location of sensitive receivers;
·
Report the
audit results to the ER and EPD in parallel;
·
Review the
EM&A reports (monthly and quarterly summary reports) submitted by the ET;
·
Review the
proposal on mitigation measures submitted by the Contractor in accordance with
the Event and Action Plans;
·
Check the
mitigation measures submitted by the Contractor in accordance with the Event
and Action Plans;
·
Check the
mitigation measures that have been recommended in the EIA and this Manual, and
ensure they are properly implemented in a timely manner, when necessary; and
·
Report the
findings of site inspections and other environmental performance reviews to ER
and EPD.
3.1.1.4 Sufficient and suitably qualified professional and technical staff shall be employed by the respective parties to ensure full compliance with their duties and responsibilities, as required under the EM&A programme for the duration of the Project.
3.1.1.5 The ET Leader shall have at least 7 years of experience in conducting EM&A for infrastructure projects. His / Her qualification shall be vetted by the ER and the IEC. And the IEC should possess at least 7 years of experience in EM&A.
4.1.1.1
The Contractor shall
prepare the Environmental Management Plan (EMP) (including a Waste Management
Plan, WMP), Construction Method Statement prior to the commencement of
construction works and obtain approval from ER and IEC and other relevant
authorities to encompass the recommended environmental protection / mitigation
measures with respect to their latest construction methodology and programme.
4.2 Environmental Management Plan
4.2.1.1 A systematic EMP shall be set up by the Contractor to ensure effective implementation of the mitigation measures, monitoring and remedial requirements presented in EIA, EM&A and Environmental Mitigation Implementation Schedule (EMIS) (See Appendix 13.1 in the EIA Report). The ER and the IEC will audit the implementation status against the EMP and advise the necessary remedial actions required. These remedial actions shall be enforced by the ER through contractual means.
4.2.1.2 The EMP will require the Contractor (together with its sub-contractors) to define in details how to implement the recommended mitigation measures in order to achieve the environmental performance defined in the Hong Kong environmental legislation and the EIA documentation.
4.2.1.3
The review of on-site
environmental performance shall be undertaken by ER and IEC through a
systematic checklist and audit once the construction commences. The
environmental performance review programme comprises a regular assessment on
the effectiveness of the EMP. Reference should be made to ETWBTC 19 / 2005
“Environmental Management on Construction Sites” or its latest versions, and
any other relevant Technical Circulars.
4.3.1.1 As part of EMP, the Contractor shall include WMP for the construction of the project and prior to the commencement of construction works submit to the ER and IEC for approval. Where waste generation is unavoidable, the opportunities for recycling or reusing should be maximised. If wastes cannot be recycled, recommendations for appropriate disposal routes should be provided in the WMP. A method statement for stockpiling and transportation of the excavated materials and other construction wastes should also be included in the WMP and approved before the commencement of construction. All mitigation measures arising from the approved WMP shall be fully implemented.
4.3.1.2
For the purpose of
enhancing the management of Construction and Demolition (C&D) materials
including rock, and minimising its generation at source, construction would be
undertaken in accordance with the Section 4.1.3 of Chapter 4 in the Project
Administration Handbook for Civil Engineering Works (PAH).
4.4
Construction
Method Statement
4.4.1.1
In case the Contractor
would like to adopt alternative construction methods or implementation
schedules, it is required to submit details of methodology and equipment to the
ER for approval before the work commences. Any changes in construction method
shall be reflected in a revised EMP or the Contractor will be required to
demonstrate the manner in which the existing EMP should accommodate the
proposed changes. The Contractor may
need to apply for a Variation of Environmental Permit (VEP) from EPD before
commencement of any construction activities.
5.1.1.1
The EIA has considered the
potential air quality impacts during both the construction and operational
phases of the Project. Fugitive dust and vehicular emission would be the key
impacts during the construction phase and operational phase respectively.
5.2.1.1
The EIA Report has
recommended dust control measures including watering all works area once per
hour during working hours. Mitigation measures
are not required for the operational phase. All the proposed mitigation
measures are summarised in the Environmental Mitigation Implementation Schedule
(EMIS) in Appendix 13.1 in the EIA Report.
5.3.1.1
Monitoring and audit of the
Total Suspended Particulate (TSP) levels shall be carried out by the ET to
ensure that any deteriorating air quality could be readily detected and timely
action taken to rectify the situation.
5.3.1.2
One-hour and 24-hour TSP
levels should be measured to indicate the impacts of construction dust on air
quality. The 24-hour TSP levels shall be measured by following the standard
high volume sampling method as set out in the Title 40 of the Code of Federal
Regulations, Chapter 1 (Part 50), Appendix B. Upon approval of the IEC, 1-hour
TSP levels can be measured by direct reading method which are capable of
producing comparable results as that by the high volume sampling method, to
indicate short event impacts.
5.3.1.3
All relevant data including
temperature, pressure, weather conditions, elapsed-time meter reading for the
start and stop of the sampler, identification and weight of the filter paper,
and any other local atmospheric factors affecting or affected by site
conditions, etc., shall be recorded down in detail. A sample data sheet is
shown in Appendix 5.1.
5.4.1.1
High volume samplers (HVSs)
complying with the following specifications shall be used for carrying out the
1-hour and 24-hour TSP monitoring:
·
0.6 – 1.7
m3 per minute adjustable flow range;
·
Equipped
with a timing / control device with +/- 5 minutes accuracy for 24 hours operations;
·
Installed
with elapsed-time meter with +/- 2 minutes accuracy for 24 hours operation;
·
Capable of
providing a minimum exposed area of 406cm2;
·
Flow
control accuracy: +/- 2.5% deviation over 24-hour sampling period;
·
Equipped
with a shelter to protect the filer and sampler;
·
Incorporated
with an electronic mass flow rate controller or other equivalent devices;
·
Equipped
with a flow recorder for continuous monitoring;
·
Provided
with a peaked roof inlet;
·
Incorporated
with a manometer;
·
Able to
hold and seal the filter paper to the sampler housing at horizontal position;
·
Easily
changeable filter; and
·
Capable of
operating continuously for a 24-hour period.
5.4.1.2
The ET is responsible for
the provision, installation, operation, maintenance, dismantle of the
monitoring equipment. They shall ensure that sufficient number of HVSs with an
appropriate calibration kit is available for carrying out the baseline
monitoring, regular impact monitoring and ad hoc monitoring. The HVSs shall be
equipped with an electronic mass flow controller and be calibrated against a
traceable standard at regular intervals. All the equipment, calibration kit,
filter papers, etc., shall be clearly labelled.
5.4.1.3
Initial calibration of dust
monitoring equipment shall be conducted upon installation and thereafter at
fortnightly intervals. The transfer standard shall be traceable to the
internationally recognized primary standard and be calibrated annually. The
concern parties such as IEC shall properly document the calibration data for
future reference. All the data should be converted into standard temperature
and pressure condition.
5.4.1.4
The flow-rate of the
sampler before and after the sampling exercise with the filter in position
shall be verified to be constant and be recorded in the data sheet as mentioned
in Appendix
5.1.
5.4.1.5
If the ET proposes to use a
direct reading dust meter to measure 1-hour TSP levels, they shall submit
sufficient information to the IEC to prove that the instrument is capable of
achieving a comparable results to the HVS. The instrument should also be
calibrated regularly, and the 1-hour sampling shall be determined periodically
by the HVS to check the validity and accuracy of the results measured by direct
reading method.
5.4.1.6
Wind data monitoring
equipment shall also be provided and set up for logging wind speed and wind
direction near the dust monitoring locations. The equipment installation
location shall be proposed by the ET and agreed with the IEC. For installation
and operation of wind data monitoring equipment, the following points shall be
observed:
·
The wind
sensors should be installed at 10m above ground so that they are clear of
obstructions or turbulence caused by buildings;
·
The wind
data should be captured by a data logger, the data shall be downloaded for
analysis at least once a month;
·
The wind
data monitoring equipment should be re-calibrated at least once every six
months; and
·
Wind
direction should be divided into 16 sectors of 22.5 degrees each.
5.4.1.7
In exceptional situations,
the ET may propose alternative methods to obtain representative wind data upon
approval from the ER and agreement from the IEC.
5.5
Laboratory Measurement / Analysis
5.5.1.1
A clean laboratory with
constant temperature and humidity control, and equipped with necessary
measuring and conditioning instruments to handle the dust samples collected,
shall be available for sample analysis, and equipment calibration and
maintenance. The laboratory should be
Hong Kong Laboratory Accreditation Scheme (HOKLAS) accredited.
5.5.1.2
If as site laboratory is
set up or a non-HOKLAS accredited laboratory is hired for carrying out the
laboratory analysis, the laboratory equipment shall be approved by the ER and
the measurement procedures shall be demonstrated to the satisfaction of the ER
and IEC. IEC shall regularly audit to the measurement performed by the
laboratory to ensure the accuracy of measurement results. The ET Leader shall
provide the ER with one copy of the Title 40 of Code of Federal Regulations,
Chapter 1 (Part 50), Appendix B for his / her reference.
5.5.1.3
Filter paper of size 8” x 10”
shall be labelled before sampling. It shall be a clean filter paper with no
pinholes, and shall be conditioned in a humidity-controlled chamber for over
24-hours and be pre-weighed before use for the sampling.
5.5.1.4
After sampling, the filter
paper loaded with dust shall be kept in a clean and tightly sealed plastic bag.
The filter paper shall then be returned to the laboratory for reconditioning in
the humidity-controlled chamber followed by accurate weighing by an electronic
balance with readout down to 0.1 mg. The balance shall be regularly calibrated
against a traceable standard.
5.6.1.1
Figure 5.1.1 to Figure 5.1.4 show the locations of the
proposed construction dust monitoring station. The status and locations of dust
sensitive receivers may change after issuing this manual. If such cases exist,
the ET Leader shall proposed updated monitoring locations and seek approval
from ER and agreement from the IEC.
Table 5.1 Construction dust monitoring locations
|
ID |
Location |
|
A1 |
Village House along Man Kam
To Road |
|
A2 |
Village House at San Uk Ling |
|
A3 |
Village
House at Muk Wu Nga Yiu |
5.6.1.2
When alternative monitoring
locations are proposed, the proposed site should, as far as practicable:
·
be at the
site boundary or such locations close to the major dust emission source;
·
be close
to the sensitive receptors; and
·
take into
account the prevailing meteorological conditions.
5.6.1.3
The ET shall agree with the
ER in consultation with the IEC on the position of the HVS for the installation
of the monitoring equipment. When
positioning the samplers, the following points shall be noted:
·
a
horizontal platform with appropriate support to secure the samplers against
gusty wind should be provided;
·
no two
samplers should be placed less than 2 meters apart;
·
the
distance between the sampler and an obstacle, such as buildings, must be at
least twice the height that the obstacle protrudes above the sampler;
·
a minimum
of 2 meters of separation from walls, parapets and penthouses is required for
rooftop samplers;
·
a minimum
of 2 meters separation from any supporting structure, measured horizontally is
required;
·
no furnace
or incinerator flue is nearby;
·
airflow
around the sampler is unrestricted;
·
the
sampler is more than 20 meters from the dripline;
·
any wire
fence and gate, to protect the sampler, should not cause any obstruction during
monitoring;
·
permission
must be obtained to set up the samplers and to obtain access to the monitoring
stations; and
·
a secured
supply of electricity is needed to operate the samplers.
5.6.1.4
The ET may, depending on
site conditions and monitoring results, decide whether additional monitoring
locations shall be included or any monitoring locations could be removed / relocated during any stage
of the construction phase.
5.7.1.1
Baseline monitoring shall
be carried out at all of the designated monitoring locations (see Table 5.1) for at least 14 consecutive days
prior to the commissioning of major construction works to obtain daily 24-hour
TSP samples. The selected baseline monitoring stations should reflect baseline
conditions at the impact stations. One-hour sampling should also be done at
least 3 times per day while the highest dust impact is expected.
5.7.1.2
During the baseline
monitoring, there should not be any major construction or dust generation
activities in the vicinity of the monitoring stations. Before commencing
baseline monitoring, the ET shall inform the IEC of the baseline monitoring
programme such that, if required, the ER can conduct on-site audit to ensure
accuracy of the baseline monitoring results.
5.7.1.3
In case the baseline
monitoring cannot be carried out at the designated monitoring locations, the ET
Leader shall carry out the monitoring at alternative locations that can
effectively represent the baseline conditions at the impact monitoring
locations. The alternative baseline monitoring locations shall be approved by
the ER and agreed with the IEC.
5.7.1.4
In exceptional cases, when
insufficient baseline monitoring data or questionable results are obtained, the
ET shall liaise with the IEC and EPD to agree on an appropriate set of data to
be used as a baseline reference and submit to ER for approval.
5.7.1.5
Ambient conditions may vary
seasonally and shall be reviewed once every three months. When the ambient
conditions have changed and a repeat of the baseline monitoring is required to
be carried out for obtaining the updated baseline levels, the monitoring should
be at times when the Contractor's activities are not generating dust, at least
in the proximity of the monitoring stations. Should change in ambient
conditions be determined, the baseline levels and, in turn, the air quality
criteria, should be revised. The revised baseline levels and air quality
criteria should be agreed with the IEC and EPD.
5.8.1.1
The ET shall carry out
impact monitoring during the entire construction period. For regular impact
monitoring, the sampling frequency of at least once in every 6 days, shall be
strictly observed at all the monitoring stations for 24-hour TSP monitoring.
For 1-hour TSP monitoring, the sampling frequency of at least 3 times in every
6 days should be undertaken when the highest dust impact occurs. Before commencing impact monitoring, the ET
shall inform the IEC of the impact monitoring programme such that the IEC can
conduct on-site audit to ensure accuracy of the monitoring results.
5.8.1.2
The specific time to start
and stop the 24-hour TSP monitoring shall be clearly defined for each location
and be strictly followed by the ET.
5.8.1.3
In case of non-compliance
with the air quality criteria, more frequent monitoring, as specified in the
Action Plan in the following section, shall be conducted within the specified
timeframe after the result is obtained. This additional monitoring shall be
continued until the excessive dust emission or the deterioration in air quality
is rectified, and agreed with the ER and the IEC.
5.9.1.1
The baseline monitoring
results form the basis for determining the air quality criteria for the impact
monitoring. The ET shall compare the impact monitoring results with air quality
criteria set up for 24-hour TSP and 1-hour TSP. Table 5.2 shows the air quality criteria, namely Action and Limit
Levels to be used.
Table 5.2 Action and Limit Levels for air quality
|
Parameters |
Action |
Limit |
|
24-hour TSP Level in μg/m3 |
For baseline level £ 200 μg/m3,
Action level = (baseline level * 1.3 + Limit
level)/2; For baseline level > 200 μg/m3, Action level = Limit level |
260 μg/m3 |
|
1-hour TSP Level in μg/m3 |
For baseline level £ 384 μg/m3,
Action level = (baseline level * 1.3 + Limit
level)/2; For baseline level > 384 μg/m3, Action level = Limit level |
500 μg/m3 |
5.10.1.1
Should non-compliance of
the air quality criteria occur, actions in accordance with the Action Plan in Table 5.3 shall be carried out.
Table 5.3 Event and Action Plan for air quality
|
Event |
Action |
|||
|
ET |
IEC |
ER |
Contractor |
|
|
Action level
exceedance for one sample |
1.
Identify source, investigate the causes of exceedance and propose remedial
measures; 2. Inform
IEC and ER; 3. Repeat
measurement to confirm finding; 4.
Increase monitoring frequency to daily. |
1. Check monitoring
data submitted by ET; 2. Check
Contractor’s working method. |
1. Notify
Contractor. |
1. Rectify
any unacceptable practice; 2. Amend
working methods if appropriate. |
|
Action
level exceedance for two or more consecutive samples |
1.
Identify source; 2. Inform
IEC and ER; 3. Advise
the ER on the effectiveness of the proposed remedial measures; 4. Repeat
measurements to confirm findings; 5.
Increase monitoring frequency to daily; 6. Discuss
with IEC and Contractor on remedial actions required; 7. If
exceedance continues, arrange meeting with IEC and ER; 8. If
exceedance stops, cease additional monitoring. |
1. Check
monitoring data submitted by ET; 2. Check
Contractor’s working method; 3. Discuss
with ET and Contractor on possible remedial measures; 4. Advise
the ET on the effectiveness of the proposed remedial measures; 5.
Supervise Implementation of remedial measures. |
1. Confirm
receipt of notification of failure in writing; 2. Notify
Contractor; 3. Ensure
remedial measures properly implemented. |
1. Submit
proposals for remedial to ER within 3 working days of notification; 2.
Implement the agreed proposals; 3. Amend
proposal if appropriate. |
|
Limit
level exceedance for one sample |
1.
Identify source, investigate the causes of exceedance and propose remedial measures; 2. Inform
ER, Contractor and EPD; 3. Repeat
measurement to confirm finding; 4.
Increase monitoring frequency to daily; 5. Assess
effectiveness of Contractor’s remedial actions and keep IEC, EPD and ER
informed of the results. |
1. Check
monitoring data submitted by ET; 2. Check
Contractor’s working method; 3. Discuss
with ET and Contractor on possible remedial measures; 4. Advise
the ER on the effectiveness of the proposed remedial measures; 5.
Supervise implementation of remedial measures. |
1. Confirm
receipt of notification of failure in writing; 2. Notify
Contractor; 3. Ensure
remedial measures properly implemented. |
1. Take
immediate action to avoid further exceedance; 2. Submit
proposals for remedial actions to IEC within 3 working days of notification; Implement
the agreed proposals; 4. Amend
proposal if appropriate. |
|
Limit
level exceedance for two or more consecutive samples |
1. Notify
IEC, ER, Contractor and EPD; 2.
Identify source; 3. Repeat
measurement to confirm findings; 4. Increase
monitoring frequency to daily; 5. Carry
out analysis of Contractor’s working procedures to determine possible
mitigation to be implemented; 6. Arrange
meeting with IEC and ER to discuss the remedial actions to be taken; 7. Assess
effectiveness of Contractor’s remedial actions and keep IEC, EPD and ER
informed of the results; 8. If
exceedance stops, cease additional monitoring. |
1. Discuss
amongst ER, ET, and Contractor on the potential remedial actions; 2. Review
Contractor’s remedial actions whenever necessary to assure their
effectiveness and advise the ER accordingly; 3.
Supervise the implementation of remedial measures. |
1. Confirm
receipt of notification of failure in writing; 2. Notify
Contractor; 3. In
consultation with the IEC, agree with the Contractor on the remedial measures
to be implemented; 4. Ensure
remedial measures properly implemented; 5. If
exceedance continues, consider what portion of the work is responsible and
instruct the Contractor to stop that portion of work until the exceedance is
abated. |
1. Take
immediate action to avoid further exceedance; 2. Submit
proposals for remedial actions to IEC within 3 working days of notification; 3.
Implement the agreed proposals; 4.
Resubmit proposals if problem still not under control; 5. Stop
the relevant portion of works as determined by the ER until the exceedance is
abated. |
Note:
ET –
Environmental Team
IEC –
Independent Environmental Checker
ER –
Engineer’s Representative
6.1.1.1
The EIA has considered the potential noise
impacts during both the construction and operational phases of the Project.
Construction noise from mechanical equipment would be the key impacts during
the construction phases in which site clearance and formation works for
columbarium and crematorium area, road widening works for Sha Ling Road and Lin
Ma Hang Road, slope works, construction of new ramps and tipping halls to
facilitate barging point operation etc. would need to be conducted. Road
traffic noise from Man Kam To Road, Sha Ling Road and Lin Ma Hang Road would
also affect the neighbouring sensitive receivers during operational phase.
6.2.1
Construction Phase
6.2.1.1
The EIA Report has recommended
construction noise mitigation measures including the use of quiet plant and
temporary noise barriers, etc. All the proposed mitigation measures are
summarised in the EMIS in Appendix 13.1 in the EIA Report.
6.2.2
Operational Noise
6.2.2.1
A series of noise mitigation
measures including absorptive noise barriers and low noise surfacing materials
would need to be implemented along Sha Ling Road and Lin Ma Hang Road. These
mitigation measures are listed in Table
6.1 and are shown in Figure 6.1.1 to Figure 6.1.5.
Table 6.1 Noise mitigation measures for operational phase
|
Mitigation Measure ID |
Location |
Type of Mitigation Measures [1] |
|
For Existing NSRs |
||
|
MM1 |
Along Sha Ling Road |
Approx. 12m long, 2.5m high ANB |
|
MM2 |
Along Sha Ling Road |
Approx. 92m long, 2.5m high ANB |
|
MM3 |
Along Project Road near Sha Ling Road |
Approx. 28m long, 3m high ANB |
|
MM4 |
Along Project Road near Sha Ling Road |
Approx. 51m long, 3m high ANB |
|
MM5 |
Along Lin Ma Hang Road near San Uk
Ling |
Approx. 25m long, 4m high ANB |
|
MM6 |
Along Lin Ma Hang Road near San Uk
Ling |
Approx. 21m long, 4m high ANB |
|
MM7 |
Along Lin Ma Hang Road near San Uk
Ling |
Approx. 14m long, 4m high ANB |
|
MM8 |
Along Lin Ma Hang Road near San Uk
Ling |
Approx. 18m long, 3m high ANB |
|
MM9 |
Along temporary pullover space
opposite San Uk Ling |
Approx. 42m long, 3m high ANB |
|
MM10 |
Along Lin Ma Hang Road opposite San
Uk Ling |
Approx.
93m long, 3m high ANB |
|
MM11 |
Along Lin Ma Hang Road near San Uk
Ling |
Approx. 185m long, low noise
surfacing materials |
|
For Planned NSRs [2] |
||
|
MM12 |
Along Lin Ma Hang Road near Muk Wu
Nga Yiu |
Approx. 36m long, 5m high ANB |
|
MM13 |
Along Lin Ma Hang Road near Muk Wu
Nga Yiu |
Approx. 47m long, 5m high ANB |
|
MM14 |
Along Lin Ma Hang Road near Muk Wu
Nga Yiu |
Approx. 31m long, 5m high ANB |
|
MM15 |
Along Lin Ma Hang Road near Muk Wu
Nga Yiu |
Approx. 31m long, 5m high ANB |
|
MM16 |
Along Lin Ma Hang Road near Muk Wu
Nga Yiu |
Approx. 41m long, 5m high ANB |
|
MM17 |
Along Lin Ma Hang Road near Muk Wu
Nga Yiu |
Approx. 340m long, low noise
surfacing materials |
Note:
[1] ANB – Absorptive noise barrier.
[2] Planned NSRs are assigned within the
“V” zone of Muk Wu Nga Yiu.
6.3
Noise
Monitoring Parameters
6.3.1
Noise Monitoring Parameter for Construction Phase
6.3.1.1
Construction noise level
shall be measured in terms of the A-weighted equivalent continuous sound
pressure level (Leq). Leq (30min) shall be used as the
monitoring parameter for the time period between 0700 and 1900 hours on normal
weekdays. For all other time periods, Leq
(5min) shall be employed for comparison with the Noise Control Ordinance
(NCO) criteria.
A sample data sheet is shown in Appendix 6.1.
6.3.1.2
As supplementary
information for data auditing, statistical results such as L10 and L90
shall also be obtained for reference.
6.3.2
Noise Monitoring Parameter for Operational Phase
6.3.2.1
The traffic noise level
shall be measured twice within the first year of the road opening. Measurement
shall be made in terms of A-weighted L10 over three half-hour
periods during the peak traffic hour. Other metrics like Leq may be
added as seen fit.
6.3.2.2
As supplementary
information for data auditing, statistical results such as L10 and L90
shall also be obtained for reference.
6.4.1
Monitoring Equipment for Construction and Operational Phases
6.4.1.1
As referred to in the
Technical Memorandum (TM) issued under the NCO, sound level meters in
compliance with the International Electrotechnical Commission Publications 651:
1979 (Type 1) and 804: 1985 (Type 1) specifications shall be used for carrying
out the noise monitoring. Immediately prior to and following each noise
measurement, the accuracy of the sound level meter shall be checked using an
acoustic calibrator generating a known sound pressure level at a known
frequency. Measurements may be accepted
as valid only if the calibration level from before and after the noise
measurement agrees to within 1.0 dB.
6.4.1.2
Noise measurements should
be made in accordance with standard acoustical principles and practices in
relation to weather conditions.
6.4.1.3
The ET is responsible for
the provision, installation, operation, maintenance, dismantle of the
monitoring equipment. He shall ensure that sufficient noise measuring equipment
and associated instrumentation are available for carrying out the baseline
monitoring, regular impact monitoring and ad hoc monitoring. All the equipment
and associated instrumentation shall be clearly labelled.
6.5.1
Monitoring Locations for Construction Phase
6.5.1.1
The most representative and
affected NSRs were selected as monitoring stations and details could be
referred to EIA Report. The locations of construction airborne noise monitoring
stations are summarised in table below and
shown in Figure
6.2.1 to Figure 6.2.4.
Table 6.2 Proposed construction noise
monitoring locations
|
Location
ID |
NSR
ID |
Description |
|
CN-1 |
N5-2 |
Village house to the west of
Sha Ling Road |
|
CN-2 |
N9-1 |
Village house to the north of
Man Kam To Road |
|
CN-3 |
N18-5 |
Village house near San Uk
Ling |
|
CN-4 |
N21-4 |
Village house of Muk Wu |
6.5.1.2
The ET shall select the
monitoring locations from the above table based on the locations of the construction
activities and seek approval from ER and agreement from the IEC and EPD to the
proposal. The monitoring locations should be chosen based on the following
criteria:
·
At
locations close to the major site activities which are likely to have noise impacts;
·
Close to
the most affected existing noise sensitive receivers; and
·
For
monitoring locations located in the vicinity of the sensitive receivers, care
should be taken to cause minimal disturbance to the occupants during
monitoring.
6.5.1.3
The monitoring station
shall normally be at a point 1m from the exterior of the sensitive receiver
building facade and be at a position 1.2m above the ground. If there is problem
with access to the normal monitoring position, an alternative position may be
chosen, and a correction to the measurements shall be made. For reference, a
correction of +3 dB(A) shall be made to the free field measurements. The ET shall agree with the IEC on the
monitoring position and the corrections adopted. Once the positions for the
monitoring stations are chosen, the baseline monitoring and the impact
monitoring shall be carried out at the same positions.
6.5.1.4
The ET may, depending on
site conditions and monitoring results, decide whether additional monitoring
locations shall be included or any monitoring locations could be removed /
relocated during any stage of the construction phase.
6.5.2
Monitoring Locations for Operational Phase
6.5.2.1
The locations of road
traffic noise monitoring stations are summarised in table below and shown in Figure 6.3.1 to Figure 6.3.5.
Table 6.3 Proposed road traffic noise
monitoring locations
|
Location ID |
NSR ID |
Description |
|
ON-1 |
N5-2 |
Village
house to the west of Sha Ling Road |
|
ON-2 |
N9-1 |
Village house
to the north of Man Kam To Road |
|
ON-3 |
N18-5 |
Village
house near San Uk Ling |
|
ON-4 |
N23-4 |
Village house of Muk Wu Nga Yiu |
6.5.2.2 The ET shall select the monitoring location and seek approval from ER and agreement from the IEC and EPD to the proposal. The ER/IEC/EPD may also request a closer locations based on on-site conditions and environmental complaint. The monitoring locations should be chosen based on the following criteria:
·
At
locations close to the noise mitigation measures such as noise barriers;
·
Close to
the most affected existing noise sensitive receivers; and
·
For
monitoring locations located in the vicinity of the sensitive receivers, care
should be taken to cause minimal disturbance to the occupants during
monitoring.
6.5.2.3 The monitoring station shall normally be at a point 1m from the exterior of the sensitive receiver building facade and be at a position 1.2m above the ground. If there is problem with access to the normal monitoring position, an alternative position may be chosen, and a correction to the measurements shall be made. For reference, a correction of +3 dB(A) shall be made to the free field measurements. The ET shall agree with the IEC on the monitoring position and the corrections adopted.
6.6.1.1
The ET shall carry out baseline
noise monitoring prior to the commencement of the construction works. There
shall not be any construction activities in the vicinity of the stations during
the baseline monitoring. Continuous
baseline noise monitoring for the A-weighted levels Leq, L10
and L90 shall be carried out daily for a period of at least two
weeks in a sample period of 5 minutes or 30 minutes between 0700 and 1900, and
5 minutes between 1900 and 0700. A schedule on the baseline monitoring shall be
submitted to the ER and IEC for approval before the monitoring starts.
6.6.1.2
In exceptional cases, when
insufficient baseline monitoring data or questionable results are obtained, the
ET shall liaise with the IEC and EPD to agree on an appropriate set of data to
be used as a baseline reference and submit to the ER for approval.
6.7.1
Impact Monitoring for Construction Phase
6.7.1.1
During normal construction
working hour (0700-1900 Monday to Saturday), monitoring of Leq, (30min) noise
levels (as six consecutive Leq, (5min) readings) shall be carried
out at the agreed monitoring locations once every week in accordance with the
methodology in the TM.
6.7.1.2
In case of non-compliance
with the construction noise criteria, more frequent monitoring, as specified in
the Action Plan, shall be carried out. This additional monitoring shall be
continued until the recorded noise levels are rectified or proved to be
irrelevant to the construction activities.
6.7.1.3
A schedule on the
compliance monitoring shall be submitted to the ER and IEC for approval before
the monitoring starts.
6.7.2
Impact Monitoring for Road Traffic Noise during Operational Phase
6.7.2.1
The ET should prepare and
deposit to EPD, at least 6 months before the operation of the proposed roads
under the Project, a monitoring plan for the purpose of assessing the accuracy
of traffic noise predictions by comparing the noise impact predictions with the
actual impacts. The monitoring plan should contain monitoring locations,
monitoring schedules, methodology of noise monitoring including noise
measurement procedures, traffic counts and speed checks, and methodology of
comparison with the predicted levels. The ET should implement the monitoring
plan in accordance with the deposited monitoring plan unless with prior
justifications. Monitoring details and results including the comparison between
the measured noise levels and the predicted levels should be recorded in a
report to be deposited with EPD within one month of the completion of the
monitoring. The report should be certified by the ET Leader before deposit with
EPD.
6.7.2.2
Traffic noise monitoring
shall be carried out at all the designated traffic noise monitoring stations.
The following is an initial guide on the traffic noise monitoring requirements
during the operational phase:
·
two sets
of measurements at the morning traffic peak hour on normal days;
·
one set of
measurement at the morning traffic peak hour on festival days;
·
a
concurrent census of traffic flow and percentage heavy vehicles shall be
conducted for the Project Road and the existing road network in the vicinity of
each measurement points;
·
average
vehicle speed estimated for Project Road and the existing road network in the
vicinity of each measuring points; and
·
the three
sets of monitoring data shall be obtained within the first year of operation.
6.7.2.3
Measured noise levels shall
be compared with the predicted noise levels by applying appropriate conversion
corrections to allow for the traffic conditions at the time of measurement.
6.8.1.1 The ET shall compare the construction noise monitoring results with noise criteria. Table 6.4 shows the noise criteria, namely Action and Limit Levels to be used.
Table 6.4 Action and Limit Levels for construction noise
|
Time Period |
Action Level |
Limit Level |
|
0700 - 1900 hours on normal weekdays |
When one documented complaint is
received |
75 dB(A) * |
Note :
If works are to be carried out during restricted
hours, the conditions stipulated in the construction noise permit issued by the
Noise Control Authority have to be followed.
* Reduce to 70
dB(A) for schools and 65 dB(A) during school examination periods.
6.9.1
Event and Action Plan for Construction Phase
6.9.1.1
Should non-compliance of the
noise criteria occur, actions in accordance with the Action Plan in Table 6.5 shall be carried out.
Table 6.5 Event and
Action Plan for construction noise
Note:
ET – Environmental Team
IEC – Independent Environmental Checker
ER – Engineer’s Representative
6.9.1.2
For the traffic noise, the
measured / monitored noise levels shall be compared with the predicted results and
the predicted traffic flow conditions (calculated noise levels based on
concurrent traffic census obtained). In
case discrepancies are observed, explanation shall be given to justify the
discrepancies.
7.1.1.1
The EIA Report has assessed
the water quality impacts associated with the Project. According to the EIA
Report, the water quality impact could be minimised with the implementation of
mitigation measures. The water quality monitoring programme as discussed below
could ensure the implementation of the recommended mitigation measures and
provide continue improvements to the environmental conditions.
7.2.1.1
The EIA Report has
recommended construction phase mitigation measures. All the prepared mitigation
measures are summarised in the EMIS in Appendix 13.1 in the EIA Report.
7.3
Water
Monitoring Parameters
7.3.1.1
The monitoring shall
normally be established by measuring the dissolved oxygen (DO), temperature, turbidity,
salinity, pH, stream flow velocity and suspended solids (SS) in water bodies at all designated locations as specified in Section 7.6.
7.3.1.2 The measurements shall be taken at all designated monitoring stations 3 days per week. The interval between two sampling surveys shall not be less than 36 hours.
7.3.1.3 Replicate in-situ measurements and samples collected from each independent sampling event shall be collected to ensure a robust statistically interpretable database. DO, pH value, salinity, temperature and turbidity should be measured in-situ whereas other parameters should be determined by an accredited laboratory.
7.3.1.4 Other relevant data shall also be recorded, including monitoring location / position, time, water depth, tidal stages, weather conditions and any special phenomena or work underway at the construction site.
7.4.1
Dissolved Oxygen and Temperature Measuring Equipment
7.4.1.1 The dissolved oxygen (DO) measuring instruments should be portable and weatherproof. The equipment should also complete with cable and sensor, and DC power source. It should be capable of measuring:
· A DO level in the range of 0 – 20 mg/L and 0 – 200% saturation; and
· A temperature of 0 – 45 degree Celsius.
7.4.1.2 The equipment should have a membrane electrode with automatic temperature compensation complete with a cable.
7.4.1.3
Should salinity
compensation not be built-in to the DO equipment, in-situ salinity should be
measured to calibrate the DO measuring instruments prior to each measurement.
7.4.2
Turbidity Measuring Equipment
7.4.2.1 The turbidity measuring instruments should be a portable and weatherproof with DC power source. It should have a photoelectric sensor capable of measuring turbidity level between 0 – 1000 NTU (for example, Hach model 2100P or an approved similar instrument).
7.4.3
Salinity Measuring Equipment
7.4.3.1 A portable salinometer capable of measuring salinity in the range of 0 – 40 parts per thousand (ppt) should be provided for measuring salinity of the water at each monitoring location.
7.4.4
pH Measuring Equipment
7.4.4.1 A portable pH meter capable of measuring a pH range between 0.0 and 14.0 shall be provided under the specified conditions (e.g., Orion Model 250A or an approved similar instrument).
7.4.5
Positioning Equipment
7.4.5.1 A hand-held or boat-fixed type digital Differential Global Positioning System (DGPS) with way point bearing indication and Radio Technical Commission for maritime (RTCM) Type 16 error message “screen pop-up” facilities (for real-time auto-display of error messages and DGPS corrections from the Hong Kong Hydrographic Office), or other equipment instrument of similar accuracy, should be provided and used during marine water monitoring to ensure the monitoring vessel is at the correct location before taking measurements.
7.4.6
Water Depth Detector
7.4.6.1 A portable, battery-operated echo sounder should be used for water depths determination at each designated monitoring station. The detector can either be hand held or affixed to the bottom of the work boat, if the same vessel is to be used throughout the monitoring programme.
7.4.7
Water Sampling Equipment
7.4.7.1 A water sampler is required for SS, Ammonia (as N), Nitrite (as N) and Nitrate (as N) monitoring. It should comprise a transparent PVC cylinder, with a capacity of not less than 2 litres, which can be effectively sealed with latex cups at both ends. The sampler should have a positive latching system to keep it open and prevent premature closure until released by a messenger when the sampler is at the selected water depth (for example, Kahlsico Water Sampler or an approved similar instrument).
7.4.8
Sample Containers and Storage
7.4.8.1 Water samples for SS should be stored in high density polythene bottles with no preservative added, packed in ice (cooled to 4°C without being frozen) and shipment to the testing laboratory. The samples shall be delivered to the laboratory within 24 hours of collection and be analysed as soon as possible after collection.
7.4.9
Calibration of In-Situ Instruments
7.4.9.1 The pH meter, DO meter and turbidimeter shall be checked and calibrated before use. DO meter and turbidimeter shall be certified by a laboratory accredited under HOKLAS or any other international accreditation scheme, and subsequently re-calibrated at quarterly basis throughout all stages of the water quality monitoring. Responses of sensors and electrodes should be checked with certified standard solutions before each use. Wet bulb calibration for a DO meter shall be carried out before measurement at each monitoring station.
7.4.10
Back-up Equipment and Vessels
7.4.10.1 Sufficient stocks of spare parts shall be maintained for replacements when necessary. Backup monitoring equipment shall also be made available so that monitoring can proceed uninterrupted even when some equipment is under maintenance, calibration, malfunction, etc.
7.4.10.2 The water quality monitoring will involve four monitoring stations and measurements should be conducted within the prescribed tidal conditions in order to ensure the measurement / samples are representative. A multi-probe monitoring equipment set integrated with water sampler(s) is highly recommended to improve the monitoring efficiency. Depending on the actual operation, more than one field survey vessels might be required simultaneously to ensure the monitoring are conducted within the acceptable monitoring period. The ET shall also consider the use of unattended automatic sampling / monitoring devices at fixed stations where monitoring are required throughout the construction period. The use of such unattended automatic devices, however, shall be subject to the approval of the ER, IEC and EPD.
7.5
Laboratory
Measurement / Analysis
7.5.1.1 At least 3 replicate samples from each independent sampling event are required for the SS, copper measurement which shall be carried in a HOKLAS or international accredited laboratory. Sufficient water samples shall be collected at the monitoring stations for carrying out the laboratory measurement and analysis. The laboratory determination work shall start within 24 hours after collection of the water samples. The analysis for suspended solids is presented in Table 7.1.
Table 7.1 Laboratory analysis
|
Parameters |
Analytical Method |
Reporting Limit |
|
Suspended Solid (SS) |
APHA
2540-D [1] |
0.5mg/L |
7.6.1.1
Water quality monitoring will be carried out at 4 locations
(M1-M4) of the stream/pond nearby the project site
during C&C construction.
7.6.1.2
The proposed water quality monitoring locations are shown in Figure
7.1.1 and
listed in Table 7.2. The ET shall seek approval from IEC and EPD for any alternative
monitoring locations.
Table 7.2 Locations of proposed water quality monitoring stations
|
Monitoring Station |
Location |
|
M1 |
Midstream of Nam Hang Stream |
|
M2 |
Downstream of Nam Hang Stream |
|
M3 |
Wetland in the Conservation Area (CA) near Yuen Leng
Chai |
|
M4 |
Watercourse across Lin Ma Hang Road, running from
east of San Uk Ling to Man Kam To Boundary Control Point |
7.7.1.1 Baseline conditions for water quality shall be established and agreed with EPD prior to be commencement of construction works. The purpose of the baseline monitoring is to establish ambient conditions prior to the commencement of the construction works and to demonstrate the suitability of the proposed impact and control monitoring stations.
7.7.1.2 The baseline monitoring shall be conducted for at least 4 weeks prior to the commencement of construction works. The proposed water quality monitoring schedule shall be submitted to EPD by the ET at least 2 weeks before the first day of the monitoring month. The interval between two sets of monitoring shall not be less than 36 hours. EPD shall also be notified immediately for any changes in schedule.
7.7.1.3 In general, where the difference in value between the first and second in-situ measurement of DO or turbidity parameters is more than 25% of the value of the first reading, the reading shall be discarded and further readings should be taken.
7.7.1.4 There should be no construction work in the vicinity of the stations during the baseline monitoring. The baseline data will be used to establish the Action and Limit Levels. The determination of Action and Limit Levels will be discussed in Section 7.9.
7.7.1.5 Table 7.3 below summarises the proposed monitoring frequency and water quality parameters for baseline monitoring.
Table 7.3 Proposed water quality monitoring programme
|
Item |
Baseline
Monitoring |
|
Monitoring Period |
At least 4 weeks prior to the
commencement of construction work |
|
Monitoring Frequency |
3 Days in a Week |
|
Monitoring Locations |
M1, M2, M3, M4 |
|
Monitoring Parameters |
Dissolved oxygen (DO),
temperature, turbidity, salinity, pH, stream flow velocity and suspended
solids (SS). |
|
Intervals between 2 Sets of Monitoring |
Not less than 36 hours |
7.8.1.1 The impact monitoring shall be conducted during construction period. The purpose of impact monitoring is to ensure the implementation of the recommended mitigation measures, provide effective control of any malpractices, and provide continuous improvements to the environmental conditions. The proposed water quality monitoring schedule shall be submitted to EPD by the ET at least 2 weeks before the first day of the monitoring month. The interval between two sets of monitoring shall not be less than 36 hours. EPD shall also be notified immediately for any changes in schedule.
7.8.1.2 In general, where the difference in value between the first and second in-situ measurement of DO or turbidity parameters is more than 25% of the value of the first reading, the reading shall be discarded and further readings should be taken.
7.8.1.3 In case of project-related exceedances of Action and/or Limit Levels, the impact monitoring frequency shall be increased according to the requirement of Event and Action Plan. The details of Event Action Plan will be discussed in Section 7.10.
7.8.1.4 Table 7.4 below summarises the proposed monitoring frequency and water quality parameters for and impact monitoring.
Table 7.4 Proposed water quality monitoring programme
|
Item |
Impact
Monitoring |
|
Monitoring Period |
During entire construction period |
|
Monitoring Frequency |
3 Days in a Week |
|
Monitoring Locations |
M1, M2, M3, M4 |
|
Monitoring Parameters |
Dissolved oxygen (DO), temperature,
turbidity, salinity, pH, stream flow velocity and suspended solids (SS) |
|
Intervals between 2 Sets of Monitoring |
Not less than 36 hours |
7.9.1.1 The Action and Limit Levels for water quality are defined in Table 7.5 below.
Table 7.5 Action and Limit Levels for water quality
|
Parameters |
Action Level |
Limit Level |
|
DO in
mg/L |
5
percentile of baseline data. [1] |
4 mg/L or
1 percentile of baseline data. [1] |
|
SS in
mg/L |
95
percentile of baseline data or 120% of upstream
control station.[2] |
99
percentile of baseline data or 130% of upstream control station. [2] |
|
Turbidity
in NTU |
95
percentile of baseline data or 120% of
upstream control station.[2] |
99
percentile of baseline data or 130% of
upstream control station. [2] |
Note:
[1] For
DO, non-compliance occurs when monitoring results is lower than the limits.
[2] For
SS and turbidity, non-compliance occurs when
monitoring results is larger than the limits.
7.10.1.1 Should non-compliance of the criteria occur, action in accordance with the Action Plan in the Table 7.6 below shall be carried out.
Table 7.6 Event and Action Plan for water quality
|
Event |
Action |
|||
|
ET |
IEC |
ER |
Contractor |
|
|
Action level exceedance for one
sampling day |
1. Inform IEC, Contractor and ER; 2. Check monitoring data, all plant,
equipment and Contractor’s working methods; and 3. Discuss remedial measures with IEC and
Contractor and ER. |
1. Discuss with ET, ER and Contractor on the
implemented mitigation measures; 2. Review proposals on remedial measures
submitted by Contractor and advise the ER accordingly; and 3. Review and advise the ET and ER on the
effectiveness of the implemented mitigation measures. |
1. Discuss with IEC, ET and Contractor on
the implemented mitigation measures; 2. Make agreement on the remedial
measures to be implemented; 3. Supervise the implementation of agreed
remedial measures. |
1. Identify source(s) of impact; 2. Inform the ER and confirm notification
of the non-compliance in writing; 3. Rectify unacceptable practice; 4.Check all plant and equipment; 5. Consider changes of working methods; 6. Discuss with ER, ET and IEC and
purpose remedial measures to IEC and ER; and 7. Implement the agreed mitigation measures. |
|
Action level exceedance for
more than one consecutive sampling days |
1. Repeat in-situ measurement on next day
of exceedance to confirm findings; 2. Inform IEC, contractor and ER; 3. Check monitoring data, all plant, equipment
and Contractor’s working methods; 4. Discuss remedial measures with IEC,
contractor and ER 5. Ensure remedial measures are
implemented |
1. Discuss with ET, Contractor and ER on
the implemented mitigation measures; 2. Review the proposed remedial measures
submitted by Contractor and advise the ER accordingly; and 3. Review and advise the ET and ER on the
effectiveness of the implemented mitigation measures. |
1. Discuss with ET, IEC and Contractor on
the proposed mitigation measures; 2. Make agreement on the remedial
measures to be implemented ; and 3. Discuss with ET, IEC and Contractor on
the effectiveness of the implemented remedial measures. |
1. Identify source(s) of impact; 2. Inform the ER and confirm notification
of the non-compliance in writing; 3. Rectify unacceptable practice; 4. Check all plant and equipment and
consider changes of working methods; 5. Discuss with ET, IEC and ER and submit
proposal of remedial measures to ER and IEC within 3 working days of
notification; and 6. Implement the agreed mitigation
measures. |
|
Limit level exceedance for
one sampling day |
1. Repeat measurement on next day of
exceedance to confirm findings; 2. Inform IEC, contractor and ER; 3. Rectify unacceptable practice; 4. Check monitoring data, all plant, equipment
and Contractor’s working methods; 5. Consider changes of working methods; 6. Discuss mitigation measures with IEC,
ER and Contractor; and 7. Ensure the agreed remedial measures
are implemented |
1. Discuss with ET, Contractor and ER on
the implemented mitigation measures; 2. Review the proposed remedial measures
submitted by Contractor and advise the ER accordingly; and 3. Review and advise the ET and ER on the
effectiveness of the implemented mitigation measures. |
1. Discuss with ET, IEC and Contractor on
the implemented remedial measures; 2. Request Contractor to critically
review the working methods; 3. Make agreement on the remedial
measures to be implemented; and 4. Discuss with ET, IEC and Contractor on
the effectiveness of the implemented remedial measures. |
1. Identify source(s) of impact; 2. Inform the ER and confirm notification
of the non-compliance in writing; 3. Rectify unacceptable practice; 4. Check all plant and equipment and
consider changes of working methods; 5. Discuss with ET, IEC and ER and submit
proposal of additional mitigation measures to ER and IEC within 3 working
days of notification; and 6. Implement the agreed remedial
measures. |
|
Limit level exceedance for
more than one consecutive sampling days |
1. Inform IEC, contractor and ER; 2. Check monitoring data, all plant,
equipment and Contractor’s working methods; 3. Discuss mitigation measures with IEC,
ER and Contractor; and 4. Ensure mitigation measures are
implemented; and 5. Increase the monitoring frequency to
daily until no exceedance of Limit Level for two consecutive days |
1. Discuss with ET, Contractor and ER on
the implemented mitigation measures; 2. Review the proposed remedial measures
submitted by Contractor and advise the ER accordingly; and 3. Review and advise the ET and ER on the
effectiveness of the implemented mitigation measures. |
1. Discuss with ET, IEC and Contractor on
the implemented remedial measures; 2. Request Contractor to critically
review the working methods; 3. Make agreement on the remedial
measures to be implemented; 4. Discuss with ET and IEC on the
effectiveness of the implemented mitigation measures; and 5. Consider and instruct, if necessary,
the Contractor to slow down or to stop all or part of the dredging activities
until no exceedance of Limit level. |
1. Identify source(s) of impact; 2. Inform the ER and confirm notification
of the non-compliance in writing; 3. Rectify unacceptable practice; 4. Check all plant and equipment and
consider changes of working methods; 5. Discuss with ET, IEC and ER and submit
proposal of additional mitigation measures to ER and IEC within 3 working
days of notification; and 6. Implement the agreed remedial
measures. 7. As directed by the ER, to slow down or
stop all or part of the dredging activities until no exceedance of Limit
level. |
Note:
ET – Environmental Team
IEC – Independent Environmental Checker
ER – Engineer’s Representative
Each step of actions required shall be implemented within
1 working days unless otherwise specified or agreed with EPD.
8.1.1.1 The quantity and timing for the generation of waste during the construction phase have been estimated. Measures including the opportunity for on-site sorting, reusing excavated materials etc., are devised in the construction methodology to minimise the surplus materials to be disposed off-site. Proper disposal of chemical waste should be via a licensed waste collector.
8.2.1.1 All the proposed mitigation measures are stipulated in the EIA Report and summarised in the EMIS in Appendix 13.1 in the EIA Report.
8.2.1.2 EM&A requirements are required for waste management during the construction phase only and the effective management of waste arising during the construction phase will be monitored through the site audit programme. The aims of the waste audit are:
·
To ensure
the waste arising from the works are handled, stored, collected, transferred
and disposed of in an environmentally acceptable manner; and
·
To
encourage the reuse and recycling of material.
8.2.1.3 A trip-ticket system should be operated to monitor all movements of chemical wastes which will be collected by a licensed collector to a licensed facility for final treatment and disposal. Recommendations have been made to ensure proper treatment and proper disposal of these wastes in the EIA Report and summarised in the EMIS in Appendix 13.1 in the EIA Report.
8.2.1.4 According to Section 7.3.3 in the EIA report a Construction & Demolition Material Management Plan (C&DMMP) shall be submitted to the Public Fill Committee (PFC) for approval in the case of C&D materials disposal exceeding 50,000m3. The C&DMMP was submitted to the PFC in January 2016 after being approved by the CEDD Vetting Committee. The C&DMMP is currently under the consideration of the PFC.
8.2.1.5 According to Section 7.3.4 in the EIA report, the Contractor should prepare a Waste Management Plan (WMP) as part of the Environmental Management Plan (EMP) in accordance with the ETWB TC(W) No. 19/2005 for construction phase. The EMP should be submitted to the Engineer for approval. Mitigation measures proposed in the EIA Report and summarised in the EMIS should be adopted.
8.2.1.6 The types and quantities of waste that would be generated during the operational phase have been assessed. A reputable waste collector should be employed to remove general refuse during routine road cleaning activities on the roads network as stated in the EIA Report and EMIS. It is anticipated there would not be any insurmountable impacts during the operational phase.
8.3.1.1
The Contractor shall be
required to pay attention to the environmental standard and guidelines and
carry out appropriate waste management and obtain the relevant licence /
permits for waste disposal. The ET shall ensure that the Contractor has
obtained from the appropriate authorities the necessary waste disposal permits or licences including:
·
Chemical
Waste Permits / licenses under the Waste Disposal Ordinance (Cap 354);
·
Public
Dumping Licence under the Land (Miscellaneous Provisions) Ordinance (Cap 28);
·
Marine
Dumping Permit under the Dumping at Sea Ordinance (Cap 466); and
·
Effluent
Discharge Licence under the Water Pollution Control Ordinance; and
·
Approval of Construction & Demolition
Material Management Plan (C&DMMP).
8.3.1.2
The
Contractor shall refer to the relevant booklets issued by the DEP when applying
for the licence/permit and the ET shall refer to these booklets for auditing
purposes.
8.4.1.1
Regular
audits and site inspections should be carried out during construction phase by
the ET to ensure that the recommended good site practices and other recommended
mitigation measures are properly implemented by the Contractor. The audits
should concern all aspects of on-site waste management practices including
waste generation, storage, recycling, transport and disposal. Apart from site inspection, documents including
licences, permits, disposal and recycling records should be reviewed and
audited for compliance with the legislation and contract requirements.
8.4.1.2
The
requirements of the environmental audit programme are set out in Section 15 of this Manual. The audit programme
will verify the implementation status and evaluate the effectiveness of the
mitigation measures.
9.1.1.1 The EIA Report has assessed the land contamination associated with the Project.
9.2
Proposed Site
Investigation for Potentially Contaminated Areas
9.2.1.1 As outlined in Sections 8.4 and 8.5 of the EIA report, after site surveys and information request from the relevant authorities, one area, SRC-1, was identified as an area with potentially contaminated land. However, as seen in Figure 3.1 of the Land Contamination Assessment Report (Appendix 8.1 in the EIA Report), approximate 92 % of the site (~7,700m2) is located within a private land lot and it is currently under operation. In addition, according to the latest land resumption programme as advised by Engineer, only the western portion of SRC-1 with an area of approximate 1,200m2 inside private lot would require land resumption for the road widening work at Sha Ling Road and utilities construction works nearby. As such, the necessity of Site Investigation (SI) should focus on this area once the land is resumed and free for access.
9.2.1.2
For the remaining 8
% of the site (~620m2) which falls within government lot (to the
southeast of SRC-1), only paved ground was observed and neither concrete &
asphalt production nor open storage activities were observed during the site
survey. In addition, review of historical aerial photos (since Year 1973) also
revealed no sign of land contamination. As such, SI is considered not required
for this strip of land.
9.2.1.3
As outlined in Section 8.9 of the EIA report, upon land resumption and
prior to environmental SI, re-appraisal of the contaminated site should be
carried out once the works area for the Project is confirmed and site access is
available (e.g. after land resumption), to identify any hot spots for SI within the southeast and western portions of SRC-1. A complete
site walkover checklist should be completed and should any hot spots are
identified, complete justification should be provided outlining the potential
sources of contamination.
9.3
Submission
Requirements of CAP, CAR, RAP and RR
9.3.1.1
The PP would need to
prepare a Contamination Assessment Plan (CAP) presenting the findings of the
re-appraisal and strategy of the recommended SI, if required, and submit to EPD
for review and approval.
9.3.1.2
Following the completion of environmental SI and lab testing works, if
required, the Project Proponent would prepare the Contamination Assessment
Report (CAR) to present the findings of the SI and evaluate the level and
extent of potential contamination.
9.3.1.3
If land contamination is identified during the proposed environmental SI
and remediation is required, a Remediation Action Plan (RAP) would be prepared.
9.3.1.4
A Remediation Report (RR) would also be prepared to demonstrate that the
clean-up works are adequate. No construction / development works would be
carried out within the potentially contaminated areas in the Study Area prior
to the agreement of the RR.
9.3.1.5
The implementation schedule are summarised in the EMIS in Appendix 13.1 in the EIA Report.
10.1.1.1 The EIA has evaluated the ecological consequences of the Project and recommended ecological mitigation measures to avoid, minimise and compensate the impact arising from the Project.
10.1.1.2 Major mitigation measures include the reinstatement of upland grassland along engineered slopes, floral survey for species of conservation interest and transplantation plan (if applicable) and provision of enhancement of woodland in the northwest part of the Project Site. This measure is aimed to provide ecological linkages between two areas of young secondary woodland and provide ecological linkages.
10.1.1.3 Though the predicted ecological impacts on floral and faunal species of conservation importance resulting from the Project are generally of lower significance, measures including surveys of floral and faunal species of conversation importance within the proposed works areas, as well as transplantation of such identified species will be carried out to avoid and minimise the impacts to these species.
10.1.1.4 In addition, mitigation measures are required to avoid and minimise the potential ecological impact on hydrological condition and water quality of the hillside streams, as well as light disturbance impact on wildlife groups and prevention of hill fires.
10.1.1.5 The required mitigation measures adopted to avoid, minimise and compensate for the ecological impacts arising from the Project were identified in Section 9.7 of the EIA Report and are described in the following sections. The proposed ecological mitigation measures should be checked as an element of the environmental monitoring and audit programme under the Project.
10.2.1.1 The proposed mitigation measures for ecological impacts are summarised in the Environmental Mitigation Implementation Schedule (EMIS) in Appendix 13.1 in the EIA Report.
Mitigation for loss of Upland Grassland
10.2.1.2 The impacts of unavoidable loss of 10.4ha of Upland Grassland, and impacts on fauna arising from the loss, disturbance and fragmentation of these habitats, will be mitigated for by reinstatement of Upland Grassland to be reinstated along the engineered slopes (an area of approximately 0.9ha)[D4] . The reinstatement work aims to put in situ hillside grassland soil on the engineering slopes so that the seed bank in the grassland would be preserved and the regenerated floristic composition could be similar to the hillside grassland. Detailed design and proposed management and maintenance will be included in a Grassland Reinstatement Plan to be confirmed with EPD.
10.2.1.3 Site clearance works in upland grassland areas should be conducted outside of the bird breeding season (typically 1st February to 31st July). Irrespective of the foregoing, the upland grassland location should be checked for any evidence of occupation of nests by a qualified ecologist of the ET prior to the commencement of any works activity.
10.2.1.4 A Grassland Reinstatement Plan will be prepared by a qualified ecologist/botanist with full details of the findings of a baseline grassland survey, the practical details and methodology of the physical excavation, transport and storage or turves/topsoil and their subsequent reinstatement once the receptor sites have been established, along with an implementation programme of reinstatement, post-reinstatement monitoring and maintenance programme
10.2.1.5 The Plan should be submitted to and approved by EPD prior to construction. The approved grassland reinstatement works will be supervised by a qualified ecologist/botanist with relevant experience in habitat reinstatement/rehabilitation.
Flora Survey and Transplantation Plans
10.2.1.6 To mitigate for impacts to the flora of conservation importance including, but not limited to Aquilaria sinensis, Bamboo Orchid and Toothed Habenaria, vegetation surveys of impacted works areas should be conducted prior to any vegetation removal. The survey will ascertain the presence, as well as update the conditions, number, locations and habitat types of these species and other rare/protected plant species (if any) identified within construction works areas. The survey will determine the number and locations of the affected individuals of floral species of concern and evaluate the suitability and/or practicality of the transplantation. The survey will be conducted by a qualified ecologist/botanist.
10.2.1.7 A Transplantation Plan will be prepared by a qualified ecologist/botanist with full details of the findings of the comprehensive vegetation survey (including number and locations of the affected individuals, and assessment of suitability and/or practicality of the transplantation), locations of the receptor site(s), transplantation methodology, implementation programme of transplantation, post-transplantation monitoring and maintenance programme. The Plan should be submitted to and approved by EPD prior to construction. The approved transplantation works will be supervised by a qualified botanist/ horticulturist/ arborist with relevant experience in transplanting floral species of conservation importance.
Provision of Enhancement
Woodland
10.2.1.8 Enhancement planting of native tree species (0.4ha on the filled slope west of the platform and 0.2ha of woodland is created in the valley below MacIntosh Fort in the northwest of the Project Site will provide ecological linkages between existing woodland in the area). By replicating features on the nearby wet woodland, this would provide additional resources for species of conservation concern. Prior to planting, the local topography should be mechanically manipulated to reflect that of the wet woodland, such as a series of pools and interconnecting ditches to form a range of ephemeral and permeant wetland features, interspersed with woody shrubs and trees to create a closed canopy woodland. It is anticipated that there would be hydrological linkages with the wet woodland and other wetland habitats in the immediate environs. This proposed area for woodland enhancement is currently low-valued upland grassland dominated by Panicum maximum, which has developed through succession from abandoned former paddies and agricultural land
Mitigation for Impacts to Water Quality and Hydrology
(Construction Phase)
10.2.1.9
Indirect impacts due to
potential changes in water quality, hydrology and sedimentation could occur to
a series of downstream watercourses and wetland systems (including the wet
woodland, marsh and mitigation ponds) during both the construction (for the
Platform and Lin Ma Hang Road widening works) and operation stages. In turn,
these indirect impacts could affect a range of wetland and wetland-associated
fauna, including, but not limited to Two-striped Grass Frog, Pigmy Scrub
Hopper, Small Snakehead, Somanniathelphua.
zanklon, Aquatica leii and
dragonfly larvae of conservation importance.
10.2.1.10
Generally, indirect water impact
to any aquatic fauna during the construction phase should easily be avoided by
implementing water control measures (ETWB TCW No. 5/2005) to avoid direct or
indirect impacts any watercourses and good site practices (further details are
discussed in Section 6 of the EIA Report).
10.2.1.11
There are potential indirect
impacts to the hydrology and water quality of Deep Bay (see Section 9.2.3 of
the EIA Report) if the rivers passing through the assessment area and which
subsequently feed into Deep Bay become polluted or are impacted hydrologically.
However given the distance between the assessment area and Deep Bay and the low
scale of work required in the proximity of watercourses and the mitigation
proposed, it is considered any impacts as to water quality of hydrology to this
system likely to be small or negligible during the construction phase of this
Project.
10.2.1.12
In addition, construction phase
impacts on the watercourses and riparian corridor and fauna using these areas
will be minimised by erection of a 2m high, solid, dull green site boundary
fence on the edge of any active works area or 30m from the watercourse. Where this is not
practicable due to site constraints, demarcation fencing will need to be
erected to prevent unauthorised encroachment into the riparian corridor by
constructions works and traffic. Detailed
mitigation measures will be designed at the detailed design stage.
Mitigation for Noise Disturbance (Construction Phase)
10.2.1.13 Site formation and construction are tentatively proposed to cover a 65-month period from mid 2017 to late 2022. The construction work and site formation will be phased in order to reduce overall noise disturbance impacts in particular areas. Furthermore, mitigation measures to control noise disturbance during this phase will involve the selection of quieter plant, use of movable noise barriers and erection of hoarding and fencing to demarcate the site boundary.
10.2.1.14 Whilst disturbance-sensitive species, notably mammals, have been recorded in the Project boundary, many are nocturnal and there is a high availability of suitable habitats in other areas locally. The wet woodland/woodland complex to the west of the development has a good assemblage of mammals. No piling work will be conducted for the slope works close to this area and noise will be restricted to the construction of a retaining wall structure and backfill in order to create the slope. Works will be restricted to daytime and any construction lighting should be designed and positioned as to not impact on adjacent ecologically sensitive areas. It is therefore considered, through phasing of the site formation works and implementation of appropriate mitigation measures to address noise impacts (see Section 5 of the EIA Report) the potential disturbance impact on the individuals would not constitute significant impact on their population in Hong Kong and therefore the potential disturbance impact on these species is considered as minor.
Good Site Practices (Construction Phase)
10.2.1.15
In order to demonstrate
ecological awareness and to minimise the risk of indirect impacts from water
pollution, a series of good site practices should be adopted by site staff
throughout the construction phase at each works site. Such measures include the containment of silt
runoff within the Project boundary, the containment of contaminated soils for
removal from the site, appropriate storage of chemicals and chemical waste away
from sites of ecological value and the provision of sanitary facilities for on-site
workers. Adoption of such measures should permit waste to be suitably contained
within the site for subsequent removal and appropriate disposal. Furthermore,
to reduce the potential for hill fires appropriate measures should be adopted
keep sources of fire (over heated machinery, hot works, smoking areas) away
from areas of upland grassland. These are as follows:
·
Put up signs to alert site staff about any locations
which are ecologically sensitive and measures to prevent accidental impacts;
·
Erection of temporary geotextile silt or sediment
fences/oil traps around any earth-moving works to trap any sediments and
prevent them from entering watercourses;
·
Prohibition of soil
storage against trees or close to waterbodies;
·
Delineation of works site to prevent encroachment onto
adjacent habitats and fence off areas which have some ecological value;
·
No smoking, hot works or sources of fire close to upland
grassland;
·
No on-site burning of waste; and
· Waste and refuse in
appropriate receptacles.
Particular Mitigation Measures for Species of
Conservation Concern (Construction Phase)
10.2.1.16
There will be a certain amount
of vegetation clearance and tree felling required. Many of the trees affected
are landscape species; these are often introduced exotic species, with little
ecological value, and have been planted for aesthetic appeal and as part of the
landscape rehabilitation scheme. The
ecological impacts arising from the loss of these trees are not considered to
be significant. However, some compensation planting and transplanting of trees
will be required only for mitigating landscape and visual impacts (see Section
11 of the EIA Report).
10.2.1.17
Suspected breeding of several
bird species (including Chinese Francolin, Savannah Nightjar, Golden-headed
Cisticola and Plain Prinia) was observed in the upland grassland. Nesting birds
would be impacted by tree felling and vegetation removal including cutting of
grassland. All nesting birds are protected under Cap. 170. Precautionary checks by a suitably
experienced ecologist of the vegetation for the presence of nesting birds
should be carried out in the breeding season (February to July) before
vegetation clearance. These impacts can be avoided by conducting vegetation
clearance during the non-breeding season (tentatively August-January) and
phased through the project period to minimise impacts.
10.2.1.18
Surveys for breeding birds
should follow those outlined for Territory Mapping Methods (Bibby et al. 2000).
Areas proposed for vegetation clearance should be separated into plots, the size
of which will dependant on the programme of works. Each plot will be walked at a slow pace and
the route should approach 50m of every point of the plot and cover as much
ground as possible. All birds and their
breeding behaviour (including but not limited to direct sight records, calling
or singing adults, adults giving alarm calls or other vocalisations which may
have strong territorial significance, aggressive encounters between adults,
carrying of nesting material, food or faecal sacs, direct observations of birds
sitting on, or flushed from, nests) should recorded from these plots. “Pishing” or flushing of birds may help
increase observations of breeding territories. These observations should be
mapped as accurately as possible to build a picture of breeding territories
within each plot, and subsequently the Project site, to aid works
programmes. Where breeding territories
have been confirmed, a suitable exclusion zone from the nest (distance
dependant on species) should be set up (using appropriate demarcation fencing)
to prevent unauthorised access or accidental disturbance. It should be noted that nest-finding can be
extremely difficult and time consuming and a conservative approach may need to
be adopted when providing an exclusion zone.
These breeding territories should be monitored weekly until young have
fledged and are no longer dependant, or territorial activities have ceased
(e.g. through abandonment of nest); following departure from the nest,
vegetation clearance can then proceed.
10.2.1.19
It is suggested that
twice-weekly surveys be conducted, commencing within one hour of sunrise, in
order to record new breeding territories and monitor any identified
territories. Evening surveys may also
be required to survey for territorial and breeding nightjars.
Mitigation for Impacts to Water Quality and Hydrology
(Operational Phase)
10.2.1.20
Specific mitigation measures
will need to be implemented to prevent indirect impacts on the ecology of the
wet woodland (and further down the marsh and mitigation ponds) and the seasonal
watercourse to the east of the Project boundary. Mitigation measures are
proposed to address any water quality impacts due to the drainage from the
proposed platform, and any erosion issues due to the drainage from the proposed
platform. These mitigation measures include capturing the surface runoff
collected on the platform by a stormwater drainage system with silt traps,
which will also be further developed at the detailed design stage; proposed
small diameter bore pile system at the foundation of the proposed platform
structure would allow a notional free area of about 87 – 91%
for groundwater to pass through. In turn, these mitigation
measures can minimise impacts to wetland and wetland-associated fauna,
including, but not limited to Two-striped Grass Frog, Pigmy Scrub Hopper, Small
Snakehead, Somanniathelphusa zanklon,
Aquatica leii and dragonfly larvae of
conservation importance.
10.2.1.21
The stormwater drainage system
will be further developed at the detailed design stage.
Mitigation for Impacts from Street Lighting on
fireflies (Operational Phase)
10.2.1.22 It is considered that at the detailed design stage, street lighting of similar lux/light intensity as to what is currently present is utilised. Furthermore, as a precautionary measure, it is suggested that deflectors are fixed to the back of the street lights to prevent additional light reaching the marsh and causing adverse impacts to fireflies.
Mitigation for Impacts for Risk of Fire (Operational
Phase)
10.2.1.23
The increase in visitors to the
columbarium allows greater public access to the upland grassland of Sandy Ridge
and in turn, the potential for hill fires is also increased. Fires may emanate from discarded cigarettes
and from specific practices during festivals or grave-sweeping ceremonies.
10.2.1.24 In order to reduce the risk of hill fires, sufficient educational signage should be displayed throughout the columbarium warning people of the risks of fire and strictly prohibits practices that could cause hill fires. This will require input in the detailed design phase.
10.3.1.1 Site inspections are crucial to monitoring the potential for or occurrence of unforeseen impacts during the construction process. Site audits shall be undertaken during the construction phase of the Project to check that the proposed ecological mitigation measures are properly implemented and maintained as per their intended objectives. Site inspections shall be undertaken by the ET at least once per week during the routine environmental audit as detailed in Section 15.
Monitoring of Upland Grassland Reinstatement
10.4.1.1 A Grassland Reinstatement Plan will be prepared by a qualified ecologist/botanist with full details of the findings of a baseline grassland survey, the practical details and methodology of the physical excavation, transport and storage or turves/topsoil and their subsequent reinstatement once the receptor sites have been established, along with an implementation programme of reinstatement, post-reinstatement monitoring and maintenance programme. A contingency plan should be proposed in the Grassland Reinstatement Plan so as to describe the action and limit levels and the action plan if certain performance criteria (such as area of preferred habitat) are not met during the monitoring and maintenance period.
10.4.1.2 The Plan should be submitted to and approved by EPD prior to construction. The approved grassland reinstatement works will be supervised by a qualified ecologist/botanist with relevant experience in habitat reinstatement/restoration.
10.4.1.3 While implementation of the upland grassland reinstatement scheme and monitoring methodology will be detailed in the Grassland Reinstatement Plan (approved by EPD prior to construction), the key monitoring protocol is proposed below and the monitoring schedule shown in Table 10.1.
10.4.1.4 Monitoring of the reinstated upland grassland aims to examine the regeneration of the grassy and herbaceous species from the imported grassland topsoil/turves and establishment by self-seeded woody plants on the engineering slopes. The monitoring should be undertaken by means of a walk-through survey by a qualified ecologist/botanist covering all representative areas of the reinstatement area, and quantitative survey on a fixed number of 5m x 5m quadrats in the area.
10.4.1.5 During the walk-through survey, the surveyor should inspect the general regeneration of the grassy and herbaceous plants and record the total vegetation coverage on each engineering slope. Within each quadrat, plant species, including vegetation type such as grass, fern, climber, herb, shrub and tree, will be identified and counted, and area of coverage by each vegetation type and any exposed area will be estimated in percentage.
10.4.1.6 In addition to the monitoring of reinstatement of upland grassland, other factors which aid in provision of verifiable measurements of the success of establishment, rate of growth and natural recruitment should be monitored along the transects. The surveyor should also check other factors that may be influencing establishment, such as aggressive grasses, forbs or climbers, or human interference.
10.4.1.7 The establishment of upland grassland could be higher if the topsoil/turves are laid just prior to early wet season (February/March) of Year 1, a baseline quantitative monitoring and a walk-through survey should be carried out after the completion of the soil reinstatement. The baseline monitoring can also allow remedial measures to be undertaken during the first half of the ensuing wet season (April to June), and quantitative monitoring again in September of the first year to allow monitoring of the upland grassland establishment during the wet season. Six-monthly quantitative monitoring will be carried out in the following Year 2 and Year 3. In addition, walk-through survey will be conducted on a monthly basis in Year 1, while reduced to quarterly in Year 2 and Year 3. The walk-through survey should be undertaken in order to inform any adaptive or proactive management measurement, such as the need to clear invasive vegetation.
Table 10.1 Monitoring
of vegetation establishment for Upland Grassland Reinstatement Scheme
|
Reinstatement
task/ Monitoring |
Year
1 |
Year
2 |
Year
3 |
|||||||||
|
Q1 |
Q2 |
Q3 |
Q4 |
Q1 |
Q2 |
Q3 |
Q4 |
Q1 |
Q2 |
Q3 |
Q4 |
|
|
Laying of topsoil/ turves |
√ |
|
|
|
|
|
|
|
|
|
|
|
|
Baseline Monitoring |
|
√ |
|
|
|
|
|
|
|
|
|
|
|
Quantitative monitoring |
|
|
√ |
|
√ |
|
√ |
|
√ |
|
√ |
|
|
Walk-through monitoring |
||||||||||||