Water Supplies Department
46/F, Immigration Tower
7
Gloucester Road
Wan Chai, Hong Kong
Agreement
No. CE 55/2006 (EP) Inter-reservoirs Transfer Scheme (IRTS) - Water
Tunnel between Kowloon Byewash Reservoir & Lower Shing Mun Reservoir
- Environmental
Impact Assessment - Investigation
EM&A Manual (Final)
Report No.: 240564/04/E
February 09
Mott
MacDonald Hong Kong Ltd
7/F,
West Wing Office
Building
New World Centre
20 Salisbury Road
Tsim
Sha Tsui, Kowloon
Hong Kong
Tel:
2828 5757
Fax:
2827 1823
This document
has been prepared for the titled project or named part thereof and should not
be relied upon or used for any other project without an independent check being
carried out as to its suitability and prior written authority of Mott MacDonald
being obtained. Mott MacDonald accepts
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confirm his agreement to indemnify Mott MacDonald for all loss or damage
resulting therefrom. Mott MacDonald
accepts no responsibility or liability for this document to any party other
than the person by whom it was commissioned.
To the extent
that this report is based on information supplied by other parties, Mott
MacDonald accepts no liability for any loss or damage suffered by the client,
whether contractual or tortious, stemming from any conclusions based on data
supplied by parties other than Mott MacDonald and used by Mott MacDonald in
preparing this report.
1.
INTRODUCTION
1.1
Project Background
1.1.1
This Project is named as “West Kowloon Drainage Improvement
– Lai Chi Kok Transfer Scheme - Inter-Reservoirs Transfer Scheme (“IRTS”) –
Water Tunnel between Kowloon Byewash Reservoir and Lower Shing Mun Reservoir”.
1.1.2
The main objective of the Project is to serve the dual
purpose to substantially reduce stormwater discharge into the drainage system
in the Lai Chi Kok area and, at the same time, to channel the overflow into the
Lower Shing Mun Reservoir via the proposed IRTS tunnel to generate an average
annual raw water yield at about 2.5 million m3.
1.1.3
This Project partly falls within the Kam Shan Country
Park and is a designated project under Item Q.1 of Part I, Schedule 2 of the
EIAO which specifically encompasses “All
projects including new access roads, railways, sewers, sewage treatment
facilities, earthworks, dredging works and other building works partly or
wholly in an existing or gazetted proposed country park or special area, a
conservation area, an existing or gazetted proposed marine park or marine
reserve, a site of cultural heritage, and a site of special scientific interest”.
1.1.4
An application (No. ESB-154/2006) for an Environmental
Impact Assessment (“EIA”) study brief under section 5(1) of the Environmental
Impact Assessment Ordinance (“EIAO”) was submitted by the Water Supplies
Department (“WSD”) on 29 September 2006 with a Project Profile (No.
PP-298/2006). An EIA Study Brief (No.:
ESB-154/2006) was issued by EPD on 9 Nov 2006 for carrying out the EIA.
1.1.5
Figure
1.1
shows this Project and the general EIA Study Area within 500m of the adopted
tunnel alignment and both portals.
1.2
Extent of Works Required and
Programme
1.2.1
The proposed Project, which this EIA concerns,
comprises the following principal works elements:
·
Construction of a new water tunnel,
approximately 2.8 km in length and 3m in diameter, from Kowloon Byewash
Reservoir to Lower Shing Mun Reservoir;
·
Construction of an intake structure at Kowloon
Byewash Reservoir and an isolation system;
·
Construction of an outfall structure at Lower
Shing Mun Reservoir with an energy dissipater; and
·
All associated civil, structural, geotechnical,
electrical and mechanical works, including landscaping, permanent and temporary
accesses as may be necessary for the completion of the works elements listed
above.
1.2.2
The project will only involve underground tunnelling
works beneath the Kam
Shan Country
Park. No access shafts along the tunnel alignment
would be necessary. According to the
latest estimate, the Project is scheduled to commence construction in late 2009
for completion by mid 2011.
1.3
Objectives of this EM&A Programme
1.3.1
The main objectives of this EM&A Manual are:
1.
To provide a database of baseline environmental
quality for subsequent checking during the construction phase of the works;
2.
To provide information at an early stage for
identification of potential problem areas and formulation of additional
environmental mitigation measures where necessary should any of the
environmental control measures or practices fail to achieve the target
standards;
3.
To verify the environmental impacts predicted in
the EIA for the project, if necessary;
4.
To determine project compliance with relevant
regulatory standards, requirements and guidelines;
5.
To outline remedial measures to be undertaken if
unexpected problems or unacceptable impacts arise; and
6.
To provide data against which environmental
audits may be undertaken effectively.
1.4
Contents
1.4.1
The recommended EM&A programme in this Manual
contains the following information:
1.
Duties of the various project staff and their
respective responsibilities with regards to the EM&A requirements during
construction;
2.
Information on project organisation, work
schedule and activities;
3.
Requirements with respect to the work schedule
and the necessary EM&A programme to detect the various possible
environmental impacts;
4.
Definition of Action/ Limit Levels and the
establishment of Event/Action Plans;
5.
Requirements for reviewing potential sources of
pollution and assessing working procedures in the event of non-compliance with
the environmental criteria;
6.
Requirements for the presentation of EM&A
data and appropriate reporting procedures; and
7.
Proposed field data forms to be adopted during
the various phases of the works.
1.4.2
An Implementation Schedule (IS) of the environmental
mitigation measures has been developed and presented in Appendix A in accordance with the requirements of Clause 4.3 of
the EIA Study Brief.
1.4.3
This EM&A Manual shall form the basis and be
regarded as an evolving document that should be updated whenever necessary to
reflect the EP requirements and activities on-site. Any updated EM&A Manual (if necessary)
shall be certified by ET Leader, verified by the Independent Environmental
Checker (“IEC”) and finally submitted to the Engineer’s Representative (ER) and
EPD for agreement.
2.1
Key Parties and Organisation Chart
2.1.1
Involvement of relevant parties in a collaborative and
interactive manner is essential for the implementation of the recommended
EM&A programme. The key parties in
an EM&A programme include:
·
Water Supplies Department (WSD) - Project
Proponent
·
Environmental Protection Department (EPD) -
Environmental Authority
·
The Engineer and Engineer’s Representative (ER)
– Black & Veatch Hong Kong Ltd. employed under Agreement No. CE 54/2006
(WS) by WSD
·
The Independent Environmental Checker (IEC) – to
be employed by WSD or the Engineer
·
The Environmental Team (ET) – to be employed by
WSD or the Engineer or the Contractor
·
The Contractor.
2.1.2
A typical organisation chart that shows the
relationship amongst the key parties is presented in Figure 2.1. Role of each key party is briefly described
in the following sections.
2.2
Water Supplies Department
2.2.1
Water Supplies Department (“WSD”) is the project
proponent and works department and hence will assume overall responsibility for
the project. WSD shall liaise with EPD
on environmental issues associated with the project with IEC’s advices.
2.3
Environmental Protection Department
2.3.1
Environmental Protection Department (“EPD”) is the
statutory enforcement body for environmental protection matters in Hong Kong.
2.4
Engineer’s Representatives
2.4.1
The Engineer’s Representative (“ER”) shall be
responsible for overseeing the operations of the Contractor and the ET, if
under his employment. He shall advise,
co-ordinate and give instruction when appropriate for efficient implementation
of any specific environmental mitigation measures identified by the Contractor,
and/or outstanding EM&A works required to be carried out by ET in
consultation with the IEC. The ER shall
supervise the Contractor’s activities and ensure that the requirements in the
Environmental Permit (EP), EIA Report, EM&A Manual and other government’s
standards are fully complied with.
2.4.2
The ER shall inform the Contractor when action is
required to reduce impacts in accordance with the Event/Action Plans. The ER shall review the EM&A Reports
submitted by the ET and follow up the recommendations. He shall ensure that the Contractor is
implementing the environmental controls and mitigation measures as set out in
the EIA report and EM&A Manual, as well as additional measures necessary
for compliance with the relevant environmental standards.
2.4.3
In the event that the ET needs to undertake complaint
investigation work, the ER and the Contractor shall co-operate with the ET
Leader in providing all the necessary information and assistance for completion
of the investigation. If mitigation
measures are required following the investigation, the ER shall ensure that the
Contractor has carried them out.
2.5
Independent Environmental Checker
2.5.1
The Independent Environmental Checker (“IEC”) shall
preferably be employed by WSD or the Engineer and shall advise the ER on
environmental issues related to the project.
The IEC shall preferably be established one month before commencement of
major construction works. The IEC shall not be in any way an associated body of
the ER, the Contractor or the ET for the project. The IEC shall be empowered to
audit from an independent viewpoint the environmental performance during the
construction of the project. The IEC
shall be a person who has relevant professional qualifications in environmental
control and at least 7 years experience in EM&A and environmental
management.
2.5.2
The IEC shall be responsible for the duties defined in
this EM&A Manual, and shall audit the overall EM&A programme, including
the implementation of all environmental mitigation measures, submissions
required in this EM&A Manual, as well as any other relevant submissions
required under the Environmental Permit.
The IEC shall be responsible for verifying the environmental
acceptability of permanent and temporary works, relevant design plans and submissions
under the EP. The IEC shall verify the
logbook prepared and kept by the ET Leader.
The IEC shall notify EPD by fax, within 24 hours of receipt of
notification from the ET Leader of any such instance or circumstance or change
of circumstances or non-compliance with the EIA Report or the EP, which might
affect the monitoring or control of adverse environmental impact.
2.5.3
The main duty of the IEC is to carry out independent
environmental audit of the project. This
shall include, inter alias, the following:
1. Review
and audit in an independent, objective and professional manner in all aspects
of the EM&A programme;
2. Validate
and confirm the accuracy of monitoring results, appropriateness of monitoring
equipment, monitoring locations with reference to the locations of the nearby
sensitive receivers, and monitoring procedures;
3. Carry
out random sample check and audit on monitoring data and sampling procedures,
etc;
4. Conduct
random site inspection (at least once a month);
5. Audit
the EIA recommendations and EP requirements against the status of implementation
of environmental protection measures on site;
6. Review
the effectiveness of environmental mitigation measures and project
environmental performance;
7. On
an as-need basis, verify and certify the environmental acceptability of the
construction methodology (both temporary and permanent works), relevant design
plans and submissions under the environmental permit. Where necessary, the IEC shall agree in
consultation with the ET Leader and the Contractor the least impact
alternative;
8. Verify
investigation results of complaint cases and the effectiveness of corrective
measures;
9. Verify
EM&A report submitted and certified by the ET Leader; and
10. Feedback
audit results to ER/ ET by signing according to the Event/Action Plans
specified in this EM&A Manual.
2.6
Environmental Team
2.6.1
An Environmental Team (“ET”) headed by an ET Leader
shall preferably be appointed by WSD or the Contractor to carry out the
recommended EM&A programme for this project. The ET Leader shall preferably be established
one month before commencement of major construction works. Neither the ET
Leader nor the ET shall be in any way an associated body of the IEC or the
Contractor. The ET Leader[1] shall plan, organise and manage the implementation
of the EM&A programme, and ensure that the EM&A works are undertaken to
the required standards. The ET Leader
shall have relevant professional qualifications in environmental control and
possess at least 7 years experience in EM&A and/or environmental management
subject to the approval by his employer.
2.6.2
The ET Leader shall be responsible for the
implementation of the EM&A programme in accordance with the EM&A
requirements specified in this Manual and the EP. The ET Leader shall keep a contemporaneous
logbook for recording each and every instance or circumstance or change of
circumstances that may affect the compliance with the recommendations of the
EIA report. This logbook shall be kept
readily available for inspection by the IEC, and Director of Environmental
Protection (DEP) or his authorised officers.
2.6.3
Sufficient and suitably qualified professional and
technical staff shall be employed by the respective parties to ensure full
compliance with their duties and responsibility, as required under the EM&A
programme for the duration of the project.
The broad categories of works of the ET comprise the following:
1. Sampling,
analysis and statistical evaluation of monitoring parameters with reference to
the EIA study recommendations and requirements;
2. Environmental
site surveillance;
3. Inspection
and audit of compliance with environmental protection, and pollution prevention
and control regulations;
4. Inspection
and audit of compliance with procedures established to enable an effective
response to environmental incidents, exceedances or non-compliance;
5. Assess
the effectiveness of the environmental mitigation measures implemented;
6. Monitor
the implementation of environmental mitigation measures;
7. Monitor
compliance with the environmental protection clauses/specifications in the
Contract;
8. Review
the construction schedule and provide comments as necessary;
9. Review
work methodologies which may affect the extent of environmental impact during
the construction phase and comment as necessary;
10. Complaint
investigation, evaluation and identification of corrective measures;
11. Liaison
with the IEC on all environmental performance matters, and timely submission of
all relevant EM&A proforma for IEC’s approval;
12. Advice
to the Contractor on environmental improvement, awareness, enhancement matters,
etc. and;
13. Timely
submission of the EM&A report to the Project Proponent and the EPD.
2.6.4
In the event of any exceedance in Action/Limit levels,
the ET shall inform the IEC, ER and the Contractor within one working day
(Monday to Friday except public holidays) of the occurrence of each and every
occurrence, change of circumstances or non-compliance with the EIA Report so
that appropriate remedial action can be undertaken by the Contractor promptly.
2.6.5
The ET is also responsible for the preparation of the
monthly EM&A reports for submission to the EPD and copy to the Project
Proponent, IEC, the ER and Contractor.
2.6.6
The ET shall assist the Contractor through the ER in
formulating any necessary corrective actions and/or additional mitigation
measures, and liaise with relevant Government Departments where necessary.
2.7
The Contractor
2.7.1
Upon the commencement of the project, the Contractor
shall prepare and submit an Environmental Management Plan (“EMP”) for the ER’s
approval, further to the IEC’s verification.
The EMP shall comprise of the appropriate extracts from (and references
to) ETWB TCW No. 19/2005, the project EIA report, EM&A Manual and other
relevant latest government’s standards.
2.7.2
The Contractor is responsible for providing requested
information to the ET in the event of any exceedance in the environmental
criteria (Action/Limit levels) specified in this Manual or other current
environmental standards and to rectify unacceptable practices. The Contractor shall discuss with the ET
Leader, IEC and ER on any additional mitigation measures identified to be
necessary by the ET and implement the agreed measures to alleviate any
identified environmental impact to acceptable levels. The design and implementation of the control
and mitigation measures shall be the responsibility of the Contractor.
2.7.3
In the event that the ET needs to undertake complaint
investigation work, the Contractor and the ER shall co-operate with the ET
Leader in providing all the necessary information and assistance for completion
of the investigation. If mitigation
measures are required following the investigation, the Contractor shall
promptly carry out these measures.
2.7.4
The Contractor shall provide information to the ET
Leader on the action(s) undertaken targeting at environmental protection for
inclusion in the monthly EM&A report to be prepared by the ET.
Figure
2.1 Typical
Organisation Chart
3.1
Introduction
3.1.1
Based on the air quality impact assessment in the EIA,
it has been identified that no significant impacts could arise from the
construction and operation of the project through proper implementation of dust
control measures required under the Air Pollution Control (Construction Dust)
Regulation. While no other specific
control measures have been recommended, general air quality control measures
are recommended for implementation as good site practices in the EIA
report. The ET shall check the
Contractor’s implementation of air quality control measures during the regular
site environmental audit.
3.2
Environmental Audit
3.2.1
As mentioned in Section
9.1.2 of this Manual, the ET Leader is
responsible for formulating an environmental site inspection, deficiency and
action reporting system, and for carrying out site inspections under the
EM&A programme.
3.2.2
In order to check that the air quality control measures
have been implemented by the Contractor as good site practices, the ET shall
include but not limited to the following items as part of their site
inspections:
1. The
works area for site clearance shall be sprayed with water before, during and
after the operation so as to maintain the entire surface wet;
2.
Restricting heights from which materials are to
be dropped, as far as practicable to minimise the fugitive dust arising from
unloading/ loading;
3.
Immediately before leaving a construction site,
all vehicles shall be washed to remove any dusty materials from the bodies and
wheels. However, all spraying of
materials and surfaces should avoid excessive water usage;
4.
Where a vehicle leaving a construction site is
carrying a load of dusty materials, the load shall be covered entirely by clean
impervious sheeting to ensure that the dusty materials will not leak from the
vehicle;
5.
Erection of hoarding of not less than 2.4 m high
from ground level along the site boundary, where appropriate;
6.
Any stockpile of dusty materials shall be
covered entirely by impervious sheeting; and/or placed in an area sheltered on
the top and 4 sides;
7.
All dusty materials shall be sprayed with water
immediately prior to any loading, unloading or transfer operation so as to
maintain the dusty materials wet.
4.1
Introduction
4.1.1
During the construction of the project, power
mechanical equipment (PME) used will be the primary noise source. The key noise generating activities include:
·
Site clearance & formation
·
Portal/ starter tunnelling works
·
Scaffolding and superstructure works
4.1.2
Potential construction noise impacts have been assessed
at representative Noise sensitive receivers (NSRs) in the EIA report. Noise monitoring during construction phase of
the project is therefore recommended to ensure no unacceptable construction
noise impact will be posed on the nearby NSRs.
4.2
Noise Parameters
4.2.1
Construction noise level at the proposed NSR shall be
measured by the ET in terms of the A-weighted equivalent continuous sound
pressure level (Leq). Noise
measurements shall be carried out with an integrating sound level meter using
the ‘fast’ response mode. Leq(30
min) shall be used as the monitoring parameter for the time period between
07:00-19:00 hours on any day except general holidays and Sundays. For all other time periods, Leq(5
min) will be employed for comparison with the Noise Control Ordinance (NCO)
criteria.
4.2.2
The supplementary information for data auditing
statistical results such as L10 and L90 shall also be
obtained for reference.
4.3
Monitoring Equipment
4.3.1
As referenced to the Technical Memorandum (TM) issued
under the Noise Control Ordinance (NCO), sound level meters in compliance with
the International Electrical Commission Publications 651: 1979 (Type 1) and
804: 1985 (Type 1) specifications shall be used for carrying out the noise
monitoring.
4.3.2
Immediately prior to and following each noise
measurement the accuracy of the sound level meter will 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 1.0dB. The acoustic
calibrator to be used shall meet IEC 942, 1988 Class 1 specifications. Annual calibration of all sound level meters
and acoustic calibrators shall be conducted by a laboratory in Hong Kong or the manufacturer in compliance with national
standards as recommended by the manufacturer of the sound level meter and
acoustic calibrator.
4.3.3
Noise measurements should be made in accordance with
standard acoustical principles and practices in relation to weather conditions.
4.3.4
ET Leader is responsible for the availability of
monitoring equipments. He/she shall
ensure sufficient noise measuring equipments and associated instrumentations
are available for carrying out noise monitoring works. All equipment and associated instrumentations
shall be clearly labelled, stored and maintained according to the
manufacturer’s instructions.
4.4
Noise Monitoring Stations
4.4.1
The EIA report has indicated that a number of NSRs
could be impacted at higher level of noise.
In which two of them have been earmarked as the construction noise monitoring
stations as shown in Figure
4.1 to Figure 4.2
and tabulated below.
Table 4‑1 Selected Construction Noise Monitoring
Stations
|
Noise Sensitive Receivers
|
Description
|
|
LG
|
Tower 1, Lakeview Garden
|
|
VH
|
Village House
|
4.4.2
Should the status and locations of NSRs be changed
after issuing this Manual or inaccessible due to other reasons, the ET Leader shall
propose the updated monitoring location(s) and seek agreement from the IEC and
EPD of the alternative locations.
4.4.3
When alternative monitoring location(s) is/are
proposed, the monitoring location(s) shall be chosen based on the following
criteria:
·
At location(s) close to the major site
activities which is/are likely to have noise impacts;
·
Close to the NSRs (as defined by the EIAO TM);
and
·
For monitoring locations located in the vicinity
of the sensitive receivers, care shall be taken to cause minimal disturbance to
occupants during monitoring.
4.4.4
The monitoring station shall normally be at a point 1 m
from the exterior of the building facade and be at a position 1.2 m above the
ground.
4.4.5
If there is a 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 Leader shall agree
with the IEC on the monitoring position and the corrections adopted. Once the position for the monitoring station
is chosen, the baseline monitoring (if necessary) and the impact monitoring
shall be carried out at the same position.
4.4.6
Noise measurements shall be recorded on a field data
sheet together with relevant information including project name, date and time
of sampling, monitoring location and parameters, site observations and
remarks. A sample field data sheet is
attached in Appendix
C.
4.5
Baseline Monitoring
4.5.1
Baseline noise monitoring is necessary given an
existing tranquil environment in the vicinity of the work site and the local
noise sensitive uses on either ends of the IRTS and the envisaged 24-hour
tunnelling works.
4.5.2
The ET shall carry out baseline noise monitoring at
least 2 weeks before commencement of the construction works. Baseline monitoring shall be carried out for
7 evenings/ nights at the intake and outfall ends of the IRTS tunnel for the
following noise sensitive sessions during which there may be construction works
carried out.
·
All days during Evening (1900-2300 hrs) – for at
least 6 consecutive Leq (5min) results per evening per location;
·
Night-time (2300 – 0700 hrs) - for at least 6
consecutive Leq (5min) results per night per location
4.5.3
The ET Leader shall agree with the ER and the IEC on
his proposed monitoring schedule and locations at least one week before the
baseline monitoring.
4.5.4
The ET Leader shall make sure that there shall not be
any abnormal activities in the vicinity of the monitoring stations during the
baseline monitoring which would cause the monitoring results to be elevated
above normal background conditions.
4.6
Impact Monitoring
4.6.1
General construction works carried out during the
restricted hours are controlled by the Construction Noise Permit (CNP) System
under the NCO. The Contractor shall
apply for a CNP and abide by the requirements of the permit should works be
necessary in the restricted hours.
4.6.2
Noise monitoring shall be carried out at the monitoring
stations given in Table 4-1
per week. The following defines the
regular monitoring frequency at each station on a per week basis when noise
generating activities are underway:
a)
1 no. of Leq (30 min) noise
measurements between 0700-1900 hours on any normal weekdays
b)
3 nos. of consecutive Leq (5 min)
noise measurements between 0700-1900 hours on general holidays or Sundays (if
work is undertaken)
c)
3 nos. of consecutive Leq (5 min)
noise measurements between 1900-2300 hours (if evening activities are
undertaken)
d)
3 nos. of consecutive Leq (5 min)
noise measurements between 2300-0700 hours next day (if there are nighttime
activities).
4.6.3
In case of non-compliance with the construction noise
criteria, more frequent monitoring as specified in the Event/ Action Plans in Appendix B 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.
4.7
Event and Action Plan
4.7.1
The Action/ Limit levels for construction noise are
defined in Table 4-2
below. Should non-compliance of the
noise criteria occur, actions in accordance with the Event/ Action Plan given
in Appendix
B should be carried out.
Table 4‑2 Action and Limit Levels for
Construction Noise
Monitoring
|
Time Period
|
Action
|
Limit, dB(A)
|
|
Daytime
(0700-1900) except general holidays and Sunday
Measurements in Leq (30min)
|
When one
documented compliant is received
|
75 for
dwellings
70 for
Schools
65 for
schools during examination
|
|
Daytime
(0700-1900) during general holidays and Sundays and all days during Evening
(1900-2300 hrs)
Measurements in Leq (5min)
|
60 for
dwellings/ school
55 for
schools during examination
|
|
Night-time
(2300 – 0700 hrs)
Measurements in Leq (5min)
|
45
|
4.8
Noise Mitigation Measures
4.8.1
It is recommended that the Contractor should also adopt
good working practices in order to minimise construction noise as far as
possible, e.g.:
1.
The Contractor shall adopt the Code of Practice
on Good Management Practice to Prevent Violation of the Noise Control Ordinance
(Chapter 400) (for Construction Industry) published by EPD;
2.
The Contractor shall observe and comply with the
statutory and non-statutory requirements and guidelines;
3.
Before commencing any work, the Contractor shall
submit to the Engineer Representative for approval the method of working,
equipment and noise mitigation measures intended to be used at the site;
4.
The Contractor shall devise and execute working
methods to minimise the noise impact on the surrounding sensitive uses, and
provide experienced personnel with suitable training to ensure that those
methods are implemented;
5.
Noisy equipment and noisy activities should be
located as far away from the NSRs as is practical;
6.
Unused equipment should be turned off. PME
should be kept to a minimum and the parallel use of noisy equipment / machinery
should be avoided;
7.
Regular maintenance of all plant and equipment;
and
8.
Material stockpiles and other structures should
be effectively utilised as noise barriers, where practicable.
4.8.2
If the above measures are not sufficient to restore the
construction noise quality to acceptable levels, upon the advice of ET Leader,
the Contractor shall liaise with the ET Leader on some other mitigation
measures, propose them to ER for approval, and carry out the mitigation
measures.
5.1
Introduction
5.1.1
The EIA has
identified that the key impacts may arise from tunnel excavation and
construction of the intake and outfall structures. To minimise the potential impacts arising from
the construction of the proposed IRTS on water quality in the vicinity of water
sensitive receivers (WSRs), proper construction methods with good site
practices should be implemented.
5.1.2
Water
quality monitoring and audit for the project are required to ensure compliance
with the water quality criteria and the effectiveness of the proposed
mitigation measures. Discharge water
quality monitoring and audit shall be carried out during the construction
period for the works at the Intake and Outfall Portal. Should proper measures
be taken, impacts on the water quality in the Kowloon Byewash, Lower Shing Mun
Reservoirs and the associated water gathering grounds are not anticipated.
5.1.3
Site
inspections should also be required to ensure that the recommended water
pollution mitigation measures would be properly implemented, functioned and
maintained during construction phase of the Project.
5.2
Water Quality Parameters
5.2.1
Monitoring for dissolved oxygen (DO), dissolved oxygen
saturation (DO%), temperature, pH,
turbidity and suspended solids (SS) should be undertaken at designated
monitoring stations. All parameters should be measured in-situ except SS, which
should be determined by the laboratory.
5.2.2
Other relevant data should also be recorded, including
monitoring location/position, time, weather conditions and any special
phenomena or work underway at the construction site.
5.3
Monitoring Equipment
5.3.1
Water samples
for all monitoring parameters should be collected, stored, preserved and
analysed according to the Standard Methods for the Examination of Water and
Wastewater, APHA 21 ed. and/or methods agreed by the Director of Environmental
Protection. The following equipment or equivalent should be provided by the ET
and used for monitoring of water quality impact:
Dissolved Oxygen and Temperature Measuring
Equipment
5.3.2
DO and water temperature should be measured in-situ by
a DO/temperature meter. The instruction should be portable and weather proof
using a DC power source. It should have a membrane electrode with automatic
temperature compensation complete with a cable. The equipment should be capable
of measuring:
·
A DO level in the range of 0-20 mg/l and 0-200%
saturation; and
·
A temperature of between 0 and 45 degree
Celsius.
pH Measuring Instrument
5.3.3
A portable pH meter capable of measuring a range
between 0.0 and 14.0 should be provided to measure pH under the specified
conditions (e.g. Orion Model 250A or an approved similar instrument)
accordingly to the Standard Methods, APHA.
Turbidity Measuring Instrument
5.3.4
Turbidity
should be measured in situ by the nephelometric method. The instrument should
be portable and weatherproof using a DC power source complete with cable,
sensor and comprehensive operation manuals. The equipment should be capable of
measuring turbidity between 0-1000 NTU.
Water Sampling Equipment
5.3.5
A water
sampler, consisting of a transparent PVC or glass cylinder of a capacity of not
less than two litres which can be effectively sealed
with cups at both ends should be used (Kahlsico Water Sampler 13SWB203 or an
approved similar instrument).
5.3.6
Water
samples for SS measurement should be collected in high density polythene
bottles, packed in ice (cooled to 4°C without being frozen) and delivered to
HOKLAS accredited laboratory for analysis as soon as possible after collection.
Calibration of In Situ Instruments
5.3.7
All in
situ monitoring instruments should be checked, calibrated and certified by a
laboratory accredited under HOKLAS or other international accreditation scheme
before use, and subsequently re-calibrated at 3 monthly intervals throughout
all stages of the water quality monitoring. Response of sensors and electrodes
shall be checked with certified standard solutions before each use. On-site
analyses are required to be carried out by trained and competent personnel.
5.3.8
For the
on site calibration of field equipment, the BS 127:1993, "Guide to Field
and on-site test methods for the analysis of waters" should be observed.
Sufficient stocks of spare parts should be maintained for replacements when
necessary. Backup monitoring equipment should also be made available so that
monitoring can proceed uninterrupted even when some equipment is under
maintenance, calibration, etc.
Laboratory Analytical Methods
5.3.9
Analysis
of SS should be carried out in a HOKLAS or other international accredited
laboratory. Table
5-1 shows the standard test methods of the proposed determinants for
laboratory analysis.
Table
5‑1 Methods
for Laboratory Analysis for Water Samples
|
Parameters
(Unit)
|
Suggested
Method
|
Detection
Limit
|
|
SS (mg/L)
|
APHA* 2540 D
|
< 0.1 mg/L
|
5.3.10
The testing
laboratory should be HOKLAS accredited (or if not, approved by the ER) and
comprehensive quality assurance and control procedures in place in order to
ensure quality and consistency in results.
5.3.11
If a
site laboratory is set up or a non-HOKLAS and non-international accredited
laboratory is hired for carrying out the laboratory analysis, the laboratory
equipment, analytical procedures, and quality control should be approved by ER.
In any circumstances, the QA/QC should be in accordance with the requirement of
HOKLAS or international accredited scheme such as ISO 17025:2005. The QA/QC results should be reported. EPD may also request the laboratory to carry out
analysis of know standards provided by EPD for quality assurance.
5.3.12
Additional
duplicate samples might be required by EPD for inter laboratory calibration. Remaining
samples after analysis should be kept by the laboratory for 3 months in case
repeat analysis is required.
5.3.13
If
in-house or non-standard methods are proposed, details of the method verification
may also be required for submission to EPD. In any circumstance, the sample testing should
have comprehensive quality assurance and quality control programmes. The
laboratory should prepare to demonstrate the programmes to EPD.
5.4
Monitoring Locations
5.4.1
Water
quality monitoring should be carried out at the proposed monitoring locations
as detailed in Table
5-2 and Figures
5.1 and 5.2. The final locations and number of the
monitoring points should be agreed with EPD at least 2 weeks before undertaking any
monitoring works. The status and
locations of water quality sensitive receivers may change after issuing this
manual. If such cases exist, the ET
leader should propose updated monitoring locations and seek approval from the
IEC and EPD.
Table 5‑2 Water
Quality Monitoring Stations
|
ID
|
Description
|
|
C1
|
Control Point near Intake Site
|
|
C2
|
Control Point near Outfall Site
|
|
D1
|
Discharge Point near Intake Site
|
|
D2
|
Discharge Point near Outfall Site
|
5.4.2
When
alternative monitoring locations are proposed, they should be chosen based on
the following criteria:
·
At locations close to and preferably at the
boundary of the mixing zone of the major site activities, which are likely to
have water quality impacts;
·
Close to the sensitive receptors which are
directly or likely to be affected;
·
For monitoring locations located in the vicinity
of the sensitive receptors, care should be taken to cause minimal disturbance
during monitoring;
5.4.3
Replicates
in-situ measurements and sample collected from each independent sampling event are
required for all parameters to ensure a robust statistically interpretable
dataset.
5.5
Baseline Monitoring
5.5.1
Baseline conditions for water quality shall be
established and agreed with EPD prior to the commencement of works. The purpose
of the baseline monitoring is to establish ambient conditions prior to the
commencement of the works and to demonstrate the suitability of the proposed
impact and control monitoring stations. The baseline conditions shall be
established by measuring the water quality parameters specified in Section 5.2.
The measurement shall be taken at all designated monitoring stations including
control stations for 3 days per week for 4 consecutive weeks prior to
commencement of the works.
5.5.2
There shall not be any construction activities
in the vicinity of the monitoring stations during the baseline monitoring.
5.5.3
In exceptional cases when insufficient baseline
monitoring data or questionable results are obtained, the ET Leader shall seek
approval from the IEC and EPD on an appropriate set of data to be used as
baseline reference.
5.5.4
Baseline monitoring schedule shall be notified to EPD 1 week prior to the
commencement of baseline monitoring schedule. The interval between 2
sets of monitoring shall not be less than 36 hours.
5.6
Impact Monitoring
5.6.1
During
the course of the construction works, monitoring should be undertaken three
times per week with sampling/measurement at all designated monitoring stations
including control stations proposed in Section 5.4. The interval between two sets of
monitoring should not be less than 36 hours except where there are exceedances
of Action and Limit levels, in which case the monitoring frequently would be
increased.
5.6.2
Proposed
water quality monitoring schedule should be sent to the Contractor, IEC, ER and
EPD at least one week prior to commencement of the
monitoring work. The Contractor, IEC, ER and EPD should be notified immediately of any change in
monitoring schedule.
5.7
Event and Action Plan for Water Quality
5.7.1
The
Action and Limit Levels for water quality are detailed in Table
5-3. The actions in accordance with the Event and Action Plan in Appendix B should be carried out if the water quality
assessment criteria are exceeded at any designated monitoring points.
Table
5‑3 Action
and Limit Levels for Water Quality
|
Parameters
|
Action Level
|
Limit Level
|
|
Dissolved Oxygen in mg/l
|
5
percentile of baseline data
|
1
percentile of baseline data
|
|
pH
|
95
percentile of baseline data
|
99
percentile of baseline data
|
|
Turbidity , NTU
Suspended Solids in mg/L
|
95
percentile of baseline data or 120% of upstream control station of the same
day
|
99 percentile
of baseline data or 130% of upstream control station of the same day
|
5.8
Water Quality Mitigation Measures
5.8.1
Mitigation
measures recommended for the construction phase have been summarised as below.
The implementation schedule for these measures is presented in Appendix A.
Construction of Desilting Facilities
5.8.2
Construction
for the desilting facilities at intake and outfall portals should be
carried out behind a temporary cofferdam which is watertight enclosure built in
the reservoirs and pumped dry to expose the bottom so that construction of
intake and outfall portals could be undertaken.
5.8.3
The
cofferdam composed of steel pilings driven into the slope surface of the
reservoir to form a watertight structure around the intake and outfall work
sites to prevent excavated materials from getting into the reservoirs.
The cofferdams should remain on site until completion of intake and outfall
portals and tunnel construction.
5.8.4
The cofferdams should be regularly inspected and
maintained to ensure no spillage of waste or wastewater into the reservoirs.
Indicative locations of the cofferdams are shown in Figure 5.1
and Figure
5.2 respectively.
5.8.5
During
the dewatering process, appropriate desilting devices should be provided for
treatment before discharge. The Contractor should ensure that the
discharge water from the desilting facilities comply with the WPCO/TM-DSS
requirements before discharge.
Stormwater Point and Non-point Source
Pollution
5.8.6
Construction runoff will be managed as per the Practice
Note for Professional Persons ProPECC PN1/94 - Construction Site Drainage and
the conditions of working within Water Gathering Grounds stipulated by WSD.
5.8.7
A Drainage Management Plan should be prepared by the
Contractor for approval by the Engineer for each of the works areas, detailing
the facilities and measures to manage pollution arising from surface runoff
from those works areas.
5.8.8
An Emergency Contingency Plan should also be prepared
by the Contractor, detailing the response and procedures to contain and remove
any accidental spillage along the temporary and permanent roads and at the site
at short notice to prevent or minimize the quantities of contaminants from
reaching the reservoirs and local streams leading to the reservoirs. The
Emergency Contingency Plan should be submitted to the Engineer for approval.
5.8.9
It is envisaged that the following measures will
effectively control runoff from works sites and avoid water pollution
downstream as well as the water gathering grounds: -
Construction Site Runoff and Discharge
1.
Surface run-off and effluent from the
construction sites at the intake at Kowloon Byewash Reservoir and outfall at
the Lower Shing Mun Reservoir will be directed towards adequately designed
sand/silt removal facilities such as sand/silt traps and sediment basins to
remove sand/silt particles from runoff to meet the requirements of the TM
standards under the WPCO before discharging to discharge points downstream of
the Kowloon Byewash Reservoir Dam and Lower Shing Mun Reservoir Dam
respectively as shown in Figure 5.1
and Figure
5.2.
The design of efficient silt removal facilities should be based on the
guidelines in Appendix A1 of ProPECC PN 1/94, which states that the retention
time for silt/sand traps should be 5 minutes under maximum flow conditions.
Sizes may vary depending upon the flow rate, but for a flow rate of 0.1m3/s
a sedimentation basin of 30m3 would be required and for a flow rate
of 0.5m3/s the basin would be 150m3. The detailed design
of the sand/silt traps should be undertaken by the contractor prior to the
commencement of construction;
2.
Channels, earth bunds or sand bag barriers will
be provided on-site to properly direct stormwater to the above-mentioned
facilities;
3.
Existing on-site silt removal facilities,
channels and manholes, if any, will be maintained and the deposited silt and
grit will be removed regularly, at the onset of and after each rainstorm to
ensure that these facilities are functioning properly at all times;
4.
Other manholes, if any, including any newly
constructed ones will be adequately covered and temporarily sealed so as to
prevent silt, construction materials or debris from getting into the drainage
system;
5.
Open stockpiles of materials on site will be
avoided within water gathering grounds as far as practicable. All surplus spoil
will be removed from water gathering grounds as soon as possible. Measures will
be taken to prevent the washing away of construction materials, soil, silt or
debris;
6.
Where possible, works entailing soil excavation
will be minimized during the rainy season (i.e. April to September). If excavation
in soil could not be avoided in these months or at any time of year when
rainstorms are likely, for the purpose of preventing soil erosion, temporary
exposed slope surfaces should be covered e.g. by tarpaulin, and temporary
access roads should be protected by crushed stone or gravel, as excavation
proceeds. Intercepting channels should be provided (e.g. along the crest/edge
of excavation) to prevent storm runoff from washing across exposed soil
surfaces. Arrangements should always be in place to ensure that adequate
surface protection measures can be safely carried out well before the arrival
of a rainstorm;
7.
Where applicable, final earthworks surfaces/
slopes will be well compacted and hydro-seeded following completion to prevent
erosion;
8. Where
surface runoff or construction effluent is likely to be contaminated with oil,
properly designed and maintained petrol interceptor will be provided to meet
the WPCO/TM-DSS requirements. Oil leakage or spillage shall be contained
and cleaned up immediately. Detailed design of the petrol interceptor shall be
provided by the Contractor before commencement of construction;
9. Sewage
arising from the construction workers on site should be collected by temporary
sanitary facilities e.g. portable chemical toilets. Portable toilets should be
used coupled with tankering away services provided by a licensed collector;
10.
All site discharges within Inland Waters Group A
must comply with the terms and conditions of a valid discharge licence issued
by EPD;
11.
Vehicle wheel washing facilities should be
provided, where applicable, at the site exit such that mud, debris, etc.
deposited onto the vehicle wheels or body can be washed off before the vehicles
are leaving the site area;
12.
Section of the road between the wheel washing
bay and the public road should be paved with backfill to reduce vehicle
tracking of soil and to prevent site run-off from entering public road drains;
13. Vehicle
washing facilities should be drained into desilting facilities before
discharge. The water should be recycled on site wherever possible. It is
suggested that the wash water from the wheel wash basin is either reused for
site watering or pumped to the on-site desilting facilities for treatment;
14. Desilting
facilities should be checked and the deposited silt and grit should be removed
regularly to ensure they are working properly at all times;
Construction of Tunnel, Intake and Outfall
15. To
minimize water quality impact, recycled water should be used at the cutter face
for cooling purposes. Used water should be collected and discharged to settling
tank for settlement;
16. Excess
water from the settling tank would be transferred to the desilting facilities
for treatment before discharge. The Contractor should ensure that the discharge
water from the desilting facilities and treated spent effluent arising from
tunnel boring from the desilting facilities comply with the WPCO/TM-DSS
requirements before discharge.
Protection against
Accidental Spillage
17.
The project may occasionally involve the
handling of fuel and generates chemical wastes. It must be ensured that all
fuel tanks and chemical storage are sited on sealed and bunded areas, provided
with locks and located outside water gathering grounds as far as practicable;
18.
The storage areas will be surrounded by bunds
with a capacity equal to 110% of the storage capacity of the largest tank to
prevent accidentally spilled oil, fuel or chemicals from reaching the receiving
waters;
19.
Oil and grease removal facilities will be
provided where appropriate, for example, in area near plant workshop/
maintenance areas, if any;
20.
Chemical waste arising from the site should be
properly stored, handled, treated and disposed of in compliance with the
requirements stipulated under the Waste Disposal (Chemical Waste) (General)
Regulation.
6.1
Introduction
6.1.1
Based on the waste generation assessment in the EIA
report, it has been identified that some construction wastes (including inert
and non-inert wastes), chemical waste and general refuse will be generated from
the construction activities.
6.1.2
The Contractor is responsible for waste control within
the construction site, removal of the waste material produced from the Site and
to implement any mitigation measures to minimise waste or redress problems
arising from the waste from the Site. The waste material may include any
sewage, waste water or effluent containing sand, cement, silt or any other
suspended or dissolved material to flow from the Site onto any adjoining land,
storm sewer, sanitary sewer, or any waste matter or refuse to be deposited
anywhere within the Site or onto any adjoining land.
6.2
Environmental Audit
6.2.1
As described in Section 9.1.2 of the Manual, the ET Leader is responsible for
formulating an environmental site inspection, deficiency and action reporting
system, and for carrying out site inspections under the EM&A programme.
6.2.2
The overall principles of construction waste management
are to reduce waste generation and to reuse and recycle construction waste. The
arrangement for avoidance, reuse, recovery and recycling, storage, collection,
treatment and disposal of different categories of waste to be generated from
the construction activities and the recommended mitigation measures are to be
described in a Waste Management Plan (“WMP”).
6.2.3
The Contractor shall, no later than one month after the
commencement of construction of the project, prepare a Waste Management Plan
(“WMP”) in accordance with the requirements set out in the ETWB TCW No.
19/2005, Waste Management on Construction Sites for approval by the ER. The WMP
will describe the arrangements for avoidance, reuse, recovery and recycling,
storage, collection, treatment and disposal of different categories of waste to
be generated from the construction activities and will include the recommended
mitigation measures on waste management in the EIA.
6.2.4
The WMP will indicate the disposal location(s) of all
surplus excavated materials and wastes.
A trip ticket system shall be included in the WMP. All measures
recommended in the WMP shall be fully and properly implemented by the
Contractor throughout the construction period.
6.2.5
In order to check that the waste control and mitigation
measures have been implemented by the Contractor as good site practices, the
following shall be included as part of the site inspections and audit by the
ET.
1.
An on-site environmental co-ordinator employed
by the Contractor should be identified at the outset of the works. The co-ordinator shall prepare a Waste
Management Plan (“WMP”) in accordance with the requirements set out in the ETWB
TCW No. 19/2005, Waste Management on Construction Sites. The WMP shall include
monthly and yearly Waste Flow Tables (“WFT”) that indicate the amounts of waste
generated, recycled and disposed of (including final disposal site), and which
should be regularly updated;
2.
The reuse/ recycling of all materials on site
shall be investigated and exhausted prior to treatment/ disposal off-site;
3.
Good site practices shall be adopted from the
commencement of works to avoid the generation of waste, reduce cross
contamination of waste and to promote waste minimisation;
4.
All waste materials shall be sorted on-site into
inert and non-inert C&D materials, and where the materials can be recycled
or reused, they shall be further segregated.
Inert material, or public fill will comprise stone, rock, concrete and
soil which is suitable for land reclamation and site formation whilst non-inert
materials include all other wastes generated from the construction process such
as plastic packaging and vegetation (from site clearance);
5.
The Contractor shall be responsible for
identifying what materials can be recycled/ reused, whether on-site or
off-site. In the event of the latter, the Contractor shall make arrangements
for the collection of the recyclable materials.
Any remaining non-inert waste shall be collected and disposed of to the
landfills whilst any inert C&D materials shall be re-used on site as far as
possible. Alternatively, if no use of the inert material can be found on-site,
the materials can be delivered to a public fill reception facilities after
obtaining the appropriate licence;
6.
In order to monitor the disposal of C&D
material and solid wastes at public fill reception facilities and landfills,
and control fly-tipping, a trip-ticket system shall be implemented by the
Contractor, in accordance with the contract and the requirements of WBTC
31/2004 “Trip Ticket System for Disposal of Construction and Demolition
Material”;
7.
Under the Waste Disposal (Chemical Waste)
(General) Regulation, the Contractor shall register as a Chemical Waste
Producer if chemical wastes such as spent lubricants and paints are generated
on site. Only licensed chemical waste collectors shall be employed to collect
any chemical waste generated at site. The handling, storage, transportation and
disposal of chemical wastes shall be conducted in accordance with the Code of
Practice on the Packaging, Labelling and Storage of Chemical Wastes and A Guide
to the Chemical Waste Control Scheme both published by EPD;
8.
A sufficient number of covered bins shall be
provided on site for the containment of general refuse to prevent visual
impacts and nuisance to the sensitive surroundings. These bins shall be cleared daily and the
collected waste disposed of to the refuse transfer station. Further to the
issue of ETWB TCW No. 6/2002A, Enhanced Specification for Site Cleanliness and
Tidiness, the Contractor is required to maintain a clean and hygienic site throughout
the project works;
9.
All chemical toilets, if any, shall be regularly
cleaned and the night-soil collected and transported by a licensed contractor
to a Government Sewage Treatment Works facility for disposal;
10. Toolbox
talks should be provided to workers about the concepts of site cleanliness and
appropriate waste management procedures, including waste reduction, reuse and
recycling;
11. The
Contractor shall comply with all relevant statutory requirements and guidelines
and their updated versions that may be issued during the course of project
construction.
7.1
Introduction
7.1.1
The EIA has recommended EM&A for landscape and
visual resources to be undertaken during the design, construction and
operational phases of the Project. The design, implementation and maintenance
of landscape mitigation measures is a key aspect of this and should be checked
to ensure that they are fully realised and that potential conflicts between the
proposed landscape measures and any other project works and operational
requirements are resolved at the earliest possible date and without compromise
to the intention of the mitigation measures. In addition, implementation of the
mitigation measures recommended by the EIA will be monitored through the site
audit programme.
7.2
Mitigation Measures
7.2.1
The EIA has recommended a series of mitigation measures
for both the construction and operational phases to ameliorate the landscape
and visual impacts of the Project. These
measures include the following as shown in Table
7-1, which are also summarised in the
environmental mitigation implementation schedules provided in Appendix A:
Table 7‑1 Proposed Landscape Mitigation Measures
|
Mitigation Code
|
Mitigation Measure
|
|
LMM1
|
Preservation of Existing
Topsoil - Topsoil disturbed during the
construction phase will be tested using a standard soil testing methodology and
where it is found to be worthy of retention stored for re-use. The soil will
be stockpiled to a maximum height of 2m and will be either temporarily
vegetated with hydroseeded grass during construction or covered with a
waterproof covering to prevent erosion. The stockpile should be turned over
on a regular basis to avoid acidification and the degradation of the organic
material, and reused after completion. Alternatively, if this is not
practicable, it should be considered for use elsewhere, including other
projects.
|
|
LMM2
|
Preservation of Existing Trees - The development proposals would
avoid disturbance to the existing trees as far as practicable within the
confines of both the areas surrounding the proposed water intake
and outfall structures at southern portal and northern portal respectively. It is recommended that a full
tree survey and felling application will be undertaken and submitted for
approval by the relevant government departments in accordance with WBTC No.
03/2006, Management and Maintenance of Natural Vegetation and Landscape
Works, and Tree Preservation during the detailed design phase of the
project. Where possible all trees which are not in conflict with the
proposals would be retained and shall be protected by means of fencing where
appropriate to prevent potential damage to tree canopies and root zones from
vehicles and storage of materials. Specifications for the protection of
existing trees will be circulated for approval by the relevant government
authorities during the preparation of the detailed tree survey.
|
|
LMM3
|
Compensatory Tree Planting – trees unavoidably affected by the
proposed engineering works will be compensated with a minimum ratio of 1:1
(new tree planting: trees recommended to be felled). The compensatory tree planting proposals for southern portal and northern portal presented as Figure 9.6a and
Figure 9.6b Landscape and Visual Mitigation Plan
include some 17 (southern portal) and 55
(northern portal) new specimen trees in addition to replanting of shrubs within works site would be established.
The proposed compensatory planting of trees will result in a compensatory planting ratio of 1.08:1 (new tree planting: trees recommended for felling at Southern Portal) and 1.06:1 (new tree planting: trees recommended for felling at
Northern Portal). This compares favourably with the report's assertion
that some 11 trees would be felled at Southern Portal and some 27 trees would be felled at Northern
Portal due to the proposals in this area. Following the retention
of existing trees, the successful establishment of newly planted trees, the area near Southern Portal will contain
approximately 268 trees, while the area near Northern Portal will contain approximately 231
trees. All compensatory trees will utilise
species native to Hong Kong. These proposals
will be subject to the detailed design stage of the project.
|
|
LMM4
|
Erection
of decorative screen hoarding – Decorative
hoarding surrounding the proposed works areas at both Southern and Northern
Portals will be erected during the construction period in order to reduce
visual impact to the nearby reservoir access roads.
|
|
LMM5
|
Location
of site office, storage or workshops – Site
office, storage or workshops should be carefully allocated out of the tree
protection zone during the construction stage in order to protect existing
trees.
|
|
LMM6
|
Selection
of preferred locations of the water intake and outfall structures – The
current location of proposed water intake and outfall structures have been
taken into account at the tunnel alignment design stage. Visual impact is
reduced by placing the proposed structure at the areas enclosed by existing
topography and vegetation.
|
|
LMM7
|
Appearance
of the structure – the design of the
proposal has sought to reduce the apparent visual mass of the water intake
and outfall structures through the use of contrasting textures for the
finishes of the structure, and the use of colour blocking utilising range of
visually recessive earth colours and tones.
|
|
LMM8
|
Reinstatement of disturbed vegetation at both portal areas – Reinstatement of tree and shrub planting on re-graded
slopes and temporary works areas to blend the intake structures into their
surrounding landscape and visual context.
|
7.3
Construction and Operational Phase Audit
7.3.1
A specialist Landscape Sub-Contractor should be employed
by the Contractor for the implementation of landscape construction works and
subsequent maintenance operations during the 12 month establishment
period. It is proposed that as the
majority of the planting works in the area not to be developed initially, the
planting should be conducted within the first half of the construction
contract. Thus, the establishment works
will be undertaken through the latter half of the construction contract. The intention is to provide at least 12
months establishment period for the majority of the planting works.
7.3.2
All measures undertaken by both the Contractor and the
specialist Landscape Sub-Contractor during the construction phase and first
year of the operational phase shall be audited by a Registered Landscape Architect,
as a member of the environmental auditing team, on a regular basis to ensure
compliance with the intended aims of the measures. Site inspections should be undertaken at
least once every two weeks throughout the construction period and once every two
months during the operational phase. The
broad scope of the audit is detailed below but should also be undertaken with
reference to the more specific checklist provided in Table 7-2.
Operational phase auditing will be restricted to the last 12 months of the
establishment works of the landscaping proposals and thus only the items below
concerning this period are relevant to the operational phase.
·
The extent of the agreed works areas should be
regularly checked during the construction phase. Any trespass by the Contractor outside the
limit of the works, including any damage to existing trees shall be noted;
·
The progress of the engineering works should be
regularly reviewed on site to identify the earliest practical opportunities for
the landscape works to be undertaken;
·
All existing trees and vegetation within the
study area which are not directly affected by the works are retained and
protected;
·
The methods of protecting existing vegetation
proposed by the Contractor are acceptable and enforced;
·
Preparation, lifting transport and re-planting
operations for any transplanted trees;
·
All landscaping works are carried out in
accordance with the specifications;
·
The planting of new trees, shrubs, groundcover,
climbers, ferns, grasses and other plans, together with the replanting of any
transplanted trees are carried out properly and within the right season; and
·
All necessary horticultural operations and
replacement planting are undertaken throughout the Establishment Period to ensure
the healthy establishment and growth of both transplanted trees and all newly
established plants.
Table 7‑2 Construction/ Operational Phase Audit
Checklist
|
Area of Works
|
Items to be Monitored
|
|
Protection of all trees
to be retained
|
l Identification and
demarcation of trees / vegetation to be retained;
l Creation of
precautionary area around trees to be retained equal to half of the trees
canopy diameter and fenced the precautionary area;
l Prohibition of the
storage of materials including fuel, the movement of construction vehicles,
and the refuelling and washing of equipment including concrete mixers within
the precautionary area;
l Phased segmental root
pruning for trees to be retained over a suitable period (determined by
species and size) prior to lifting or site formation works which affect the
existing root ball of trees identified for retention. The extent of the
pruning will be based on the size and the species of the tree in each case;
l Pruning of the branches
of existing trees identified for retention to be based on the principle of
crown thinning maintaining their form and amenity value;
l The watering of
existing vegetation particularly during periods of excavation when the water table
beneath the existing vegetation is lowered; and
l The rectification and
repair of damaged vegetation following the construction phase to its original
condition prior to the commencement of the works or replacement using
specimens of the same species, size and form where appropriate to the design
intention of the area affected.
|
|
Clearance of existing
vegetation
|
l Identification and
demarcation of trees / vegetation to be cleared; and
l Checking of extent of
works to minimise damage, monitoring of adjacent areas against possible
incursion, physical damage, fire, pollution, surface erosion, etc.
|
|
Plant supply
|
l Monitoring of
operations relating to the supply of specialist plant material (including the
collecting, germination and growth of plants from seed) to ensure that plants
will be available in time to be used within the construction works.
|
|
Soiling, planting, etc.
|
l Monitoring of
implementation and maintenance of soiling and planting works and against
possible incursion, physical damage, fire, pollution, surface erosion, etc.
|
|
Decorative treatment of
site hoarding
|
l Implementation and
maintenance, to ensure compliance with agreed designs.
|
|
Architectural design
and treatment of water intake and outfall
structures and associated engineering works.
|
l Implementation and
maintenance of mitigation measures, to ensure compliance with agreed designs.
|
|
Establishment Works
|
l Monitoring of implementation
of maintenance operations during Establishment Period
|
|
Management and maintenance scheme
|
l Implementation and
maintenance of mitigation measures during operation phase, to ensure
compliance with agreed designs.
|
7.3.3
In the event of non compliance the responsibilities of
the relevant parties is detailed in the Event /Action plan provided on Appendix B.
8.1
Proposed Mitigation Measure
8.1.1
The Cultural Heritage Impact Assessment for the project
has identified that there are sensitive historical structures in the vicinity
of the proposed works and that mitigation in the form of vibration monitoring
may be required during the construction phase at Intake A. Although no adverse impacts on the historical
structures are anticipated, conducting a condition survey prior to the
construction phase as a precautionary mitigation measure is recommended and the
survey report shall be submitted to AMO for review prior to the commencement of
the construction phase.
8.1.2
The following table presents the required mitigation
for the identified sites of Cultural Heritage for which adverse impacts have
been identified.
Table 8‑1 Mitigation
Recommendations for Sites of Cultural Heritage adversely impacted by the
proposed construction works at Intake A
|
Resource
|
Mitigation Recommendation
|
|
Kowloon Byewash Reservoir Dam
(Grade II)
IRTS-01
|
Although no adverse impacts are expected, conducting a condition
survey prior to the construction phase of the project as a precautionary mitigation
measure is recommended.
The survey shall check the state of the dam / valve house and provide
the most up-to-date information of the condition of these structures; and
advise any other additional protective measures are required during the construction
period. The report should be submitted to AMO for review prior to the
construction phase.
|
|
Kowloon Byewash Reservoir Valve House
(Grade II)
IRTS-02
|
|
Shek Lei Pui Northeast Dam (Grade II) IRTS-04
|
Although no adverse impacts are expected, conducting a condition
survey prior to the construction phase of the project as a precautionary
mitigation measure is recommended.
The survey shall check the state of the dam and provide the most
up-to-date information of the condition of the structure; and advise any
other additional protective measures are required during the construction
period. The report should be submitted to AMO for review prior to the
construction phase.
|
|
Shek Lei Pui
Northeast Dam Valve House (Grade II) IRTS-05
|
Although no adverse impacts are expected, conducting a condition
survey prior to the construction phase of the project as a precautionary
mitigation measure is recommended.
The survey shall check the state of the valve house and provide the
most up-to-date information of the condition of the structure; and advise any
other additional protective measures are required during the construction
period. The report should be submitted to AMO for review prior to the
construction phase.
|
|
Shek Lei Pui
Southwest Dam (Grade II) IRTS-06
|
Although no adverse impacts are expected, conducting a condition
survey prior to the construction phase of the project as a precautionary
mitigation measure is recommended.
The survey shall check the state of the dam and provide the most
up-to-date information of the condition of the structure; and advise any
other additional protective measures are required during the construction
period. The report should be submitted to AMO for review prior to the
construction phase.
|
Requirements of the Condition Survey
8.1.3
The condition survey must be carried out by an approved
qualified building surveyor who is a member of the Hong Kong Institution of
Surveyors in the Building Surveying division or equivalent and an approved
qualified engineer who is a member of the Hong Kong Institution of Engineers in
the Civil or Structural Division or equivalent.
The condition survey should also make reference (if appropriate) to the
Practice Notes No. 289 issued by the Buildings Department of the Hong Kong SAR
Government.
8.1.4
The condition survey report must be submitted to the
Engineer and the Antiquities and Monuments Office (AMO) for review before the
commencement of works and must contain the following:
·
An appraisal of the state of the existing
historic building and structures including location and condition of all signs
of defect (including suitably referenced and catalogued photographs);
·
An appraisal of their various types of
construction, including foundations;
·
Recommendations of monitoring measures to be
taken and locations of proposed monitoring points (if required);
·
Recommendations for reading frequency of the
monitoring equipment (if required); and
·
Recommendations of the necessity to conduct a
separate assessment report.
8.1.5
A separate assessment report may be produced based on
findings of this condition survey report to recommend the following:
·
Setting of a safe limit for vibration levels for
each historic structure (if required)
·
The likely effect that the contractors method of
working would have on the existing historic buildings and structures (including
the structural stability of the structure);
·
Recommendations of any other protective measures
to be taken during the construction and/ or operational phases (if required).
8.1.6
If required, monitoring measures and protective
measures must be implemented by the contractor and can include, but are not
limited to; fixing approved tell tales and tilting markers to monitoring points
to the structures and buildings and monitoring them on the schedule recommended
in the condition survey report. It should be noted that that for the
installation of monitoring measures disturbances to identified historic items
should be kept to an absolute minimum and that after removal of such measures,
the affected area should be restored to match the original condition. The results of the monitoring must be
submitted to the engineer (in an agreed format) within two days of each
monitoring undertaken. If the monitoring
measurements exceed the safe limits for any of the monitored structures, the
Contractor shall take immediate corrective action as necessary, to bring
vibration levels within compliance. The monitoring results should be submitted
to AMO only if there is significant effect on the historic items.
9.1
Site Surveillance
9.1.1
Site surveillance provides a direct means to trigger
and enforce the specified environmental protection and pollution control
measures necessary to comply with contract specifications. They shall be undertaken regularly and
routinely by the ET to inspect the activities at the works site in order to
ensure that appropriate environmental protection and pollution control
mitigation measures are properly implemented by the Contractor in accordance
with the EM&A recommendations. With
well-defined pollution control and mitigation specifications and a
well-established site inspection, deficiency and action reporting system, site
inspection is one of the most effective tools to enforce the environmental
protection requirements on the site.
9.1.2
The ET
Leader is responsible for formulation of the environmental site inspection,
deficiency and action reporting system, and for carrying out the site
inspections under the EM&A works.
He/she shall prepare and submit a proposal on the site inspection,
deficiency and action reporting procedures within 21 days of the construction
contract commencement to the ER, Contractor and IEC for agreement. A preliminary site inspection, deficiency and
action reporting system in the form of a flowchart has been prepared for
reference, and is presented in Figure 9.1
for review and refinement by the ET at the commencement of the project.
9.1.3
The ET shall conduct a site inspection at least once a
week during the construction period of the project. The areas of inspection shall include, but
shall not be limited to, the environmental situation, and pollution control and
mitigation measures within the site. It
should also review the environmental situation outside the site area that is
likely to be affected, directly or indirectly, by the site activities. The ET Leader shall make reference to the
following information in conducting the inspection:
1. The
EIA recommendations on environmental protection and pollution control
mitigation measures with regard to air quality, noise, waste management;
2. On-going
results of the EM&A programme;
3. Works
progress and programme;
4. Individual
works methodology proposals (which shall include proposals on associated
pollution control measures);
5. The
contract specifications on environmental protection and pollution prevention;
6. The
relevant environmental protection and pollution control laws, ProPECC Notes;
and
7. Previous
site inspection results.
9.1.4
The ER/ Contractor shall update the ET with all
relevant information of the contract for him/ her to carry out the site
inspections. The inspection results and
its associated recommendations on improvements to the environmental protection
and pollution control works shall be submitted to the IEC and the ER in a site
inspection proforma within 24 hours, for reference and for taking immediate
action.
9.1.5
The Contractor shall follow the procedures and time
frame as stipulated in the environmental site inspection, deficiency and action
reporting system formulated by the ET to report on any remedial measures
subsequent to the site inspections.
9.1.6
The ET shall conduct ad-hoc site inspections if
significant environmental problems are identified. The IEC shall also conduct
independent site audits. Inspections may
also be required subsequent to receipt of any environmental complaints, or as
part of the investigation work, as specified in the Event/Action Plan for
environmental monitoring and audit.
9.2
Compliance with Legal and Contractual
Requirements
9.2.1
The ET Leader shall review the progress and programme
of the works to check if relevant environmental laws have not been violated,
and that any foreseeable potential for violating the laws can be prevented.
9.2.2
The Contractor shall regularly copy relevant documents
to the ET so that the checking work can be carried out. The documents shall at least include the
updated Work Progress Reports, the updated Works Programme, and application
letters for different license/permits under the environmental protection laws,
and all valid licence(s)/permit(s). The
site diary shall also be available for the ET’s inspection upon his request.
9.2.3
After reviewing the document, the ET Leader shall
advise the ER and the Contractor of any non-compliance with the contractual and
legislative requirements on environmental protection and pollution control for
them to take follow-up actions. If the
ET Leader’s review concludes that the current status on licence/ permit
application and any environmental protection and pollution control preparation
works may not cope with the works programme or may result in potential
violation of environmental protection and pollution control requirements by the
works in due course, he shall also advise the Contractor and the ER
accordingly. The review shall be copied
to IEC for any follow-up action.
9.2.4
Upon receipt of the advice, the Contractor shall
undertake immediate action to remedy the situation. The ER shall check that the Contractor has
taken appropriate action in order that the environmental protection and
pollution control requirements are fulfilled.
9.3
Environmental Complaints
9.3.1
Complaints reviewed on environmental issues shall be
referred to the ET Leader for carrying out complaint investigation
procedures. Upon receipt of complaints
the ET shall undertake the tasks outlined below. The complaint investigation procedures are
also presented in form of a flow chart in Figure
9.2
for ease of reference.
1. Log
complaint and date of receipt onto the complaint database and inform the IEC
immediately;
2. Investigate
the complaint to determine its validity, and to assess whether the source of
the problem is due to works activities;
3. If
a complaint is valid and due to works, identify mitigation measures in
consultations with the IEC;
4. If
mitigation measures are required, advise the Contractor accordingly;
5. Review
the Contractor’s implementation of the identified mitigation measures, and the
concurrent situation;
6. If
the complaint is transferred from EPD, submit interim report to EPD on status
of the complaint investigation an follow-up action within the time frame
assigned by EPD;
7. Undertake
additional monitoring and audit to verify the complaint if necessary, and
ensure that any valid reason for complaint does not recur through proposed
amendments to work methods, procedures, machines and/or equipment, etc;
8. Report
the investigation results and the subsequent actions to the source of complaint.
(If the source of complaint is identified through EPD, the results should be
reported within the time frame assigned by EPD); and
9. Log
a record on the complaint, investigation, the subsequent actions and the
results in the monthly EM&A reports.
9.3.2
The ET Leader shall immediately notify the ER, IEC,
Contractor and EPD of any complaints received and keep him well informed of the
actions being taken to settle these complaints.
9.3.3
During the complaint investigation work, the Contractor
and ER shall co-operate with the ET Leader in providing all the necessary
information and assistance for completion of the investigation. If mitigation measures are identified to be
required in the investigation in consultation with the IEC, the Contractor
shall promptly carry out the measures.
The ER shall ensure that the Contractor has implemented the mitigation
measures.
9.4
Documentation
9.4.1
All documentation is required to be filed in a
traceable and systematically manner and ready for inspection upon request. All EM&A results and findings shall be
documented in the EM&A report prepared by the ET and endorsed by IEC prior
to circulation to the Contractor, ER and EPD
Figure 9.1 Flow Chart of Preliminary Site Inspection, Deficiency
and Action Reporting System
Figure 9.2 Flow Chart of Complaint Investigation
Procedures
10.1
General
10.1.1
The following reporting requirements are based upon a
paper-documented approach. However, the same information shall be provided in
an electronic medium upon agreeing the format with the ER and EPD. All the monitoring data (baseline and impact)
shall also be submitted in an agreed electronic format in accordance with the
requirements under Annex 21 of the EIAO TM.
This would enable a transition from a paper/historic and reactive
approach to an electronic/real time proactive approach.
10.2
Baseline Monitoring Report
10.2.1
As mentioned in Section 4.5, baseline monitoring for construction noise is
necessary. The ET Leader shall prepare
and submit a Baseline Environmental Monitoring Report within 10 working days
(Mondays to Fridays except public holidays) of completion of the baseline
monitoring.
10.2.2
Copies of the Baseline Environmental Monitoring Report
shall be submitted to each of the 4 parties: ER, Contractor, IEC and EPD. The ET Leader shall liaise with the relevant
parties on the exact number of copies needed. The format and content of the
report, and the representation of the baseline monitoring data shall be in a
format agreeable to EPD and include, but not necessarily limited to:
1.
Up to a half-page executive summary;
2.
Brief project background information;
3.
Drawings showing locations of the baseline
monitoring stations;
4.
An updated programme on construction of the
project with milestones of environmental protection/mitigation activities
annotated;
5.
Monitoring results (in both hard and soft
copies) together with the following information:
·
Monitoring methodology;
·
Types of equipment used and calibration details;
·
Parameters monitored;
·
Monitoring locations;
·
Monitoring date, time, frequency and duration;
and
·
QA/QC results and detection limits.
6.
Details of influencing factors, including:
·
Major activities, if any, being carried out on
the site during the period;
·
Weather conditions during the period; and
·
Other factors which might affect the results.
7.
Determination of the Action/ Limit levels for
each monitoring parameter and statistical analysis of the baseline data, the
analysis shall conclude if there is any significant difference between control
and impact actions for the parameters monitored;
8.
Revisions for inclusion in the EM&A Manual;
and
9.
Comments and conclusions.
10.3
Monthly EM&A Report
10.3.1
The results and findings of all EM&A work required
in this Manual shall be presented in a monthly EM&A report prepared and
certified by the ET Leader and verified by the IEC before submitting to EPD.
10.3.2
Generally, each EM&A monthly report shall be
submitted within 2 weeks of the end of each reporting month. The first report is due in the month after
the establishment phase commences.
Generally, in additional to the copies to EPD, 3 more copies of each
monthly EM&A report shall be submitted to the ER, the IEC and the
Contractor. Before submission of the
first EM&A report, the ET Leader shall liaise with the parties on the exact
number of copies and format of the monthly reports for both hard and soft copy.
10.3.3
The ET Leader shall review the number and location of
monitoring stations and parameters to be monitored every 6 months or on a
needed basis in order to cater for the changes in surrounding environment and
nature of works in progress.
10.4
First Monthly EM&A Report
10.4.1
The first monthly EM&A report shall include at
least the following, where applicable:
1. Executive
Summary (1-2 pages);
·
Breaches of Action/ Limit levels;
·
Complaint Log;
·
Notifications of any summons and successful
prosecutions;
·
Reporting Changes; and
·
Future key issues.
2. Basic
Project Information
·
Project organisation including key personnel
contact names and telephone numbers;
·
Programme with fine tuning of activities showing
the inter-relationship with environmental protection/mitigation measures for
the month;
·
Management structure; and
·
Work undertaken during the month.
3. Environmental
Status
·
Works undertaken during the month with
illustrations (such as location of works, etc.); and
·
Drawings showing the project area, any
environmental sensitive receivers and the locations of the monitoring and
control stations, if relevant.
4. Summary
of EM&A requirements including:
·
All monitoring parameters;
·
Environmental quality performance limits
(Action/ Limit levels);
·
Event/Action Plans;
·
Environmental mitigation measures, as
recommended in the project EIA study final report;
·
Environmental requirements in contract
documents;
5. Implementation
Status
·
Advice on the implementation status of
environmental protection and pollution control/ mitigation measures as
recommended in the project EIA report, summarised in the updated implementation
schedule.
6. Monitoring
Results (in both hard and soft copies) together with the following information
·
Monitoring methodology;
·
Types of equipment used and calibration details;
·
Parameters monitored;
·
Monitoring locations;
·
Monitoring date, time, frequency, and duration;
·
Weather conditions during the period;
·
Graphical plots of the monitored parameters in
the month annotated against;
o
Major activities being carried out on site
during the period;
o
Weather conditions that may affect the results;
and
o
Any other factors which might affect the
monitoring results;
·
QA/QC results and detection limits;
·
Waste generation and disposal records;
·
All monitoring results should be tabulated with
exceedances highlighted for ease of reference; and
·
Compare/contrast and assess the EM&A data
with the EIA predictions and provide discussion for any discrepancies.
7. Report
on Non-compliance, Complaints, Notifications of Summons and Successful
Prosecutions
·
Compliance status with the EP under the EIAO and
any EP submissions;
·
Record of all non-compliance (exceedances) of
the environmental quality performance limits (Action/ Limit levels);
·
Record of all complaints received (written or
verbal) for each media, including locations and nature of complaints
investigation, liaison and consultation undertaken, actions and follow-up
procedures taken, results and summary;
·
Record of all notifications of summons and
successful prosecutions for breaches of the current environmental protection/
pollution control legislation, including locations and nature of the breaches,
investigation, follow-up actions taken, result and summary;
·
Review of the reasons for and the implications
of non-compliance, complaints, summons and prosecutions including review of
pollution sources and working procedures; and
·
Description of the actions taken in the event of
non-compliance and deficiency reporting and any follow-up procedures related to
earlier non-compliance.
8. Comments,
Recommendations and Conclusions
·
An account of the future key issues reviewed
from the works programme and work method statements;
·
Advice on the solid and liquid waste management
status; and
·
Submission of implementation status proforma,
proactive environmental protection proforma, regulatory compliance proforma,
site inspection proforma, data recovery schedule and complaint log summarising
the EM&A of the period.
10.5
Subsequent Monthly EM&A Report
10.5.1
The subsequent monthly EM&A reports shall including
the following:
1. Executive
Summary (1-2 pages)
·
Breaches of Action/ Limit levels;
·
Complaint log;
·
Notifications of any summons and successful
prosecutions;
·
Reporting changes;
·
Future key issues.
2. Environmental
Status
·
Programme with fine tuning of activities showing
the inter-relationship with environmental protection/mitigation measures for
the month;
·
Work undertaken during the month with
illustrations included (such as location of works, daily, dredging/filling
rates, etc); and
·
Drawings showing the project area, any
environmental sensitive receivers and the locations of the monitoring and
control stations.
3. Monitoring
Results to provide monitoring results (in both hard and electronic copies)
together with the following information.
·
Monitoring methodology;
·
Types of equipment used and calibration details;
·
Parameters monitored;
·
Monitoring locations;
·
Monitoring date, time, frequency, and duration;
·
Weather conditions during the period;
·
Graphical plots of the monitored parameters in
the month annotated against;
o
Major activities being carried out on site
during the period;
o
Weather conditions that may affect the results;
and
o
Any other factors which might affect the
monitoring results;
·
QA/QC results and detection limits;
·
Waste generation and disposal records;
·
All monitoring results should be tabulated with
exceedances highlighted for ease of reference; and
·
Compare/contrast and assess the EM&A data
with the EIA predictions and provide discussion for any discrepancies.
4. Implementation
Status
·
Advice on the implementation status of
environmental protection and pollution control/mitigation measures as
recommended in the project EIA study report, summarised in the updated
implementation schedule.
5. Report
on Non-compliance, Complaints, Notifications of Summons and Successful
Prosecutions
·
Record of all non-compliance (exceedances) of
the environmental quality performance limits (Action/ Limit levels);
·
Record of all complaints received (written or
verbal) for each media, including locations and nature of complaints
investigation, liaison and consultation undertaken, actions and follow-up
procedures taken, results and summary;
·
Record of all notifications of summons and
successful prosecutions for breaches of the current environmental
protection/pollution control legislation, including locations and nature of the
breaches, investigation, follow-up actions taken, result and summary;
·
Review of the reasons for and the implications of
non-compliance, complaints, summons and prosecutions including review of
pollution sources and working procedures; and
·
A description of the actions taken in the event
of non-compliance and deficiency reporting and any follow-up procedures related
to earlier non-compliance.
6. Comments,
Recommendations and Conclusions
·
An account of the future key issues reviewed
from the works programme and work method statements;
·
Advice on the solid and liquid waste management
status; and
·
Submission of implementation status proforma,
proactive environmental protection proforma, regulatory compliance proforma,
site inspection proforma, data recovery schedule and complaint log summarising
the EM&A of the period.
7. Appendix
·
Action/ Limit Levels;
·
Graphical plots of trends of monitored
parameters at key stations over the past four reporting periods for
representative monitoring stations annotated against the following:
o
Major activities being carried out on Site
during the periods;
o
Weather conditions during the period; and
o
Any other factors which might affect the
monitoring results
·
Monitoring schedule for the present and next
reporting period;
·
Cumulative statistics on complaints,
notifications of summons and successful prosecutions; and
·
Outstanding issues and deficiencies.
10.6
Final EM&A Summary Report
10.6.1
Timing for completion of the EM&A Programme shall
be confirmed by ER in liaison with the IEC.
Impact monitoring shall continue until the completion of all
construction works as approved by the ER.
10.6.2
The final EM&A summary report shall include the
following:
1. An
executive summary;
2. Basic
project information including a synopsis of the project organisation,
programme, contacts of key management, and a synopsis of work undertaken during
the entire construction phase, including baseline phase activities, of the
works;
3. A
brief summary of EM&A requirements including:
·
Monitoring parameters;
·
Environmental quality performance limits
(Action/ Limit levels); and
·
Environmental mitigation measures, as
recommended in the project EIA study final report.
4. Advice
on the implementation status of environmental protection and pollution control/
mitigation measures, as recommended in the project EIA study report, summarised
in the updated implementation status proformas, including waste generation and
disposal records;
5. Drawings
showing the project area, any environmental sensitive receivers and the
locations of the monitoring and control stations;
6. Compliance
status with the EP under the EIAO and any EP submissions;
7. Graphical
plots of the trends of monitored parameters over the period of construction (of
the project) for representative monitoring stations annotated against;
·
The major activities being carried out on site
during the period;
·
Weather conditions during the period;
·
Any other factors which might affect the
monitoring results; and
·
The return of ambient environmental conditions
in comparison with baseline data.
8. Compare/contrast
and assess the EM&A data with the EIA predictions and provide discussion
for any discrepancies;
9. Provide
clear-cut decisions on the environmental acceptability of the project with
reference to the specific impact hypothesis;
10. Advice
on the solid and liquid waste management status;
11. Comments,
Recommendations and Conclusions
·
A summary of non-compliance (exceedances) of the
environmental quality performance limits (Action/ Limit levels);
·
A brief review of the reasons for and the
implications of non-compliance including review of pollution sources and
working procedures;
·
A summary description of the actions taken in
the event of non-compliance and any follow-up procedures related to earlier
non-compliance;
·
A summary record of all complaints received
(written or verbal) for each media, liaison and consultation undertaken,
actions and follow-up procedures taken;
·
Review the monitoring methodology adopted and
with the benefit of hindsight, comment on its effectiveness (including cost
effectiveness);
·
A summary record of all notification of summons
and successful prosecutions for breaches of the current environmental
protection/pollution control legislation, locations and nature of the breaches,
investigation, follow-up actions taken and results;
·
Review the practicality and effectiveness of the
EIA process and EM&A programme (e.g. effectiveness and efficiency of the
mitigation measures);
·
Recommend any improvement in the EM&A
programme.
10.7
Typical Forms to be Adopted
10.7.1
To facilitate the management of the EM&A programme
for the construction of the project, the record forms presented in Appendix C (including those presented in the preceding sections)
shall be adopted where applicable during the construction phase of the
project. These forms are listed as
follows:
1.
Implementation Status Performa;
2.
Data Recovery Schedule;
3.
Site Inspection Corrective Action Proforma;
4.
Proactive Environmental Protection Proforma;
5.
Regulatory Compliance Proforma;
6.
Complaint Log;
7.
Sample Template for Interim Notifications of
Environmental Quality Limits Exceedances; and
8.
Noise Monitoring Field Record Sheet.
10.8
Data Keeping
10.8.1
The site document such as the monitoring field records,
laboratory analysis records, site inspection forms, etc. are not required to be
included in the monthly EM&A reports, for submission. However, the document shall be well kept by
the ET and be ready for inspection upon request. All relevant information shall be clearly and
systematically recorded in the document.
The monitoring data shall also be recorded in electronic form, and the
software copy can be available upon request.
All the documents and data shall be kept for at least one year after
completion in construction of the project.
10.9
Electronic Reporting of EM&A
Information
10.9.1
To facilitate public inspection of the monthly EM&A
Reports via the Environmental Impact Assessment (EIA) Ordinance Internet
Website and at the EIA Ordinance Register Office, electronic copies of these
Reports shall be prepared by the ET in Hyper Text Markup Language (HTML)
(version 4.0 or later) and in Portable Document Format (PDF version 4.0 or
later), unless otherwise agreed by the Director the EPD and shall be submitted
by the ET at the same time as the hard copies as described in relevant
condition of the EP.
10.9.2
For the HTML version, a content page capable of
providing hyperlink to each section and sub-section of the EM&A Reports
shall be included in the beginning of the document. Hyperlinks to all figures, drawings and
tables in the EM&A Reports shall be provided in the main text from where
the respective references are made. All
graphics in the report shall be in interlaced GIF format unless otherwise
agreed by the Director of EPD. The
content of the electronic copies of these Reports shall be the same as the hard
copies.
10.9.3
The ET shall pass all environmental monitoring data and
results described in relevant conditions of the EP to the ER who will set up a
dedicated web site and notify the Director of EPD in writing the internet
address where the environmental monitoring and project data is to be placed,
within 6 weeks after the commencement of the project.
10.9.4
All these environmental monitoring data and results
described in relevant conditions of the EP shall be made available to the
public via a dedicated web site to be set up by the ER.
10.9.5
The internet website described above will enable
user-friendly public access to the monitoring data and project data including
the EIA and the EP of the project. The
internet website shall have features capable of: -
1.
Providing access to all environmental monitoring
data collected since the commencement of work
2.
Searching by date
3.
Searching by types of monitoring data (air
quality and construction waste)
4.
Hyperlinks to relevant monitoring data after
searching; or otherwise as agreed by the Director
10.10
Interim Notifications of Environmental
Quality Limit Exceedances
10.10.1
With reference to Event/Action Plans in previous
sections, when the environmental quality limits are exceeded, the ET shall
immediately notify the IEC, ER and EPD, as appropriate. The notification shall
be followed up with advice to EPD on the results of the investigation, proposed
actions and success of the actions taken, with any necessary follow-up
proposals. A sample template for the
interim notifications is shown in Appendix
C.
Appendix A Implementation Schedule
Table A‑1 Air Quality Impact – Implementation
Schedule of Recommended Mitigation Measures
|
EIA Ref.
|
EM&A Ref.
|
Recommended
Environmental Protection Measures/ Mitigation Measures
|
Objectives of the
recommended measures & main concerns to address
|
Who to implement the
measures?
|
Location / Timing of
implementation of Measures
|
What requirements or
standards for the measures to achieve?
|
|
Construction Phase
|
|
S.3.5.9
|
S.3.2.2
|
All the dust control
measures as recommended in the Air Pollution Control (Construction Dust)
Regulation, where applicable, should be implemented. Typical dust control
measures include:
|
Air Quality (fugitive
dust) Control during Construction Phase
|
Contractors
|
At all construction areas
of the site during the entire construction period
|
EIAO -TM, Air Pollution Control (Construction
Dust) Regulation
|
|
S.3.5.9
|
S.3.2.2
|
§
The
works area for site clearance shall be sprayed with water before, during and
after the operation so as to maintain the entire surface wet
|
Air Quality (fugitive
dust) Control during Construction Phase
|
Contractors
|
Ditto
|
EIAO -TM, Air Pollution Control (Construction
Dust) Regulation
|
|
S.3.5.9
|
S.3.2.2
|
§
Restricting
heights from which materials are to be dropped, as far as practicable to
minimise the fugitive dust arising from unloading/ loading
|
Air Quality (fugitive
dust) Control during Construction Phase
|
Contractors
|
Ditto
|
EIAO -TM, Air Pollution Control (Construction
Dust) Regulation
|
|
S.3.5.9
|
S.3.2.2
|
§
Immediately
before leaving a construction site, all vehicles shall be washed to remove any
dusty materials from the bodies and wheels.
However, all spraying of materials and surfaces should avoid excessive
water usage
|
Air Quality (fugitive
dust) Control during Construction Phase
|
Contractors
|
Ditto
|
EIAO -TM, Air Pollution Control (Construction
Dust) Regulation
|
|
S.3.5.9
|
S.3.2.2
|
§
Where
a vehicle leaving a construction site is carrying a load of dusty materials,
the load shall be covered entirely by clean impervious sheeting to ensure
that the dusty materials will not leak from the vehicle
|
Air Quality (fugitive
dust) Control during Construction Phase
|
Contractors
|
Ditto
|
EIAO -TM, Air Pollution Control (Construction
Dust) Regulation
|
|
S.3.5.9
|
S.3.2.2
|
§
Erection
of hoarding of not less than 2.4 m high from ground level along the site
boundary, where appropriate
|
Air Quality (fugitive
dust) Control during Construction Phase
|
Contractors
|
Ditto
|
EIAO -TM, Air Pollution Control (Construction Dust)
Regulation
|
|
S.3.5.9
|
S.3.2.2
|
§
Any
stockpile of dusty materials shall be covered entirely by impervious
sheeting; and/or placed in an area sheltered on the top and 4 sides
|
Air Quality (fugitive
dust) Control during Construction Phase
|
Contractors
|
Ditto
|
EIAO -TM, Air Pollution Control (Construction
Dust) Regulation
|
|
S.3.5.9
|
S.3.2.2
|
§
All
dusty materials shall be sprayed with water immediately prior to any loading,
unloading or transfer operation so as to maintain the dusty materials wet
|
Air Quality (fugitive
dust) Control during Construction Phase
|
Contractors
|
Ditto
|
EIAO -TM, Air Pollution Control (Construction
Dust) Regulation
|
|
Operational Phase
|
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
Table A‑2 Noise Impact – Implementation Schedule
of Recommended Mitigation Measures
|
EIA Ref.
|
EM&A Ref.
|
Recommended Environmental Protection Measures/
Mitigation Measures
|
Objectives of the recommended measures & main
concerns to address
|
Who to implement the measures?
|
Location / Timing of implementation of Measures
|
What requirements or standards for the measures
to achieve?
|
|
Construction Phase
|
|
S.4.8.2
|
S.4.8.1
|
§
The
Contractor shall adopt the Code of Practice on Good Management Practice to
Prevent Violation of the Noise Control Ordinance (Chapter 400) (for Construction
Industry) published by EPD
|
Noise control during
construction
|
Contractors
|
At all construction areas
of the site during the entire construction period
|
Annex 5 of EIAO-TM
|
|
S.4.8.2
|
S.4.8.1
|
§
The
Contractor shall observe and comply with the statutory and non-statutory
requirements and guidelines
|
Noise control during
construction
|
Contractors
|
Ditto
|
Annex 5 of EIAO-TM
|
|
S.4.8.2
|
S.4.8.1
|
§
Before
commencing any work, the Contractor shall submit to the Engineer
Representative for approval the method of working, equipment and noise
mitigation measures intended to be used at the site
|
Noise control during
construction
|
Contractors
|
Ditto
|
Annex 5 of EIAO-TM
|
|
S.4.8.2
|
S.4.8.1
|
§
The
Contractor shall devise and execute working methods to minimise the noise
impact on the surrounding sensitive uses, and provide experienced personnel
with suitable training to ensure that those methods are implemented
|
Noise control during
construction
|
Contractors
|
Ditto
|
Annex 5 of EIAO-TM
|
|
S.4.8.2
|
S.4.8.1
|
§
Noisy
equipment and noisy activities should be located as far away from the NSRs as
is practical
|
Noise control during
construction
|
Contractors
|
Ditto
|
Annex 5 of EIAO-TM
|
|
S.4.8.2
|
S.4.8.1
|
§
Unused
equipment should be turned off. PME should be kept to a minimum and the
parallel use of noisy equipment / machinery should be avoided
|
Noise control during
construction
|
Contractors
|
Ditto
|
Annex 5 of EIAO-TM
|
|
S.4.8.2
|
S.4.8.1
|
§
Regular
maintenance of all plant and equipment
|
Noise control during
construction
|
Contractors
|
Ditto
|
Annex 5 of EIAO-TM
|
|
S.4.8.2
|
S.4.8.1
|
§
Material
stockpiles and other structures should be effectively utilised as noise
barriers, where practicable
|
Noise control during construction
|
Contractors
|
Ditto
|
Annex 5 of EIAO-TM
|
|
Operational Phase
|
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
Table A‑3 Water Quality Impact – Implementation Schedule of
Recommended Mitigation Measures
|
EIA Ref.
|
EM&A Ref.
|
Recommended Environmental Protection Measures/ Mitigation Measures
|
Objectives of the recommended measures & main concerns to address
|
Who to implement the measures?
|
Location / Timing of implementation of Measures
|
What requirements or standards for the measures to achieve?
|
|
Construction Phase
|
|
S.5.10.1
-5.10.2
|
S.5.8.2
-5.8.3
|
Construction for the
desilting facilities at intake and outfall portals should be carried
out behind a temporary cofferdam which is watertight enclosure built in the
reservoirs and pumped dry to expose the bottom.
|
Point Pollution Control
|
Contractors
|
Before construction of intake
and outfall portals and remain on site until completion of intake
and outfall portals and tunnel construction
|
Water Pollution Control
Ordinance
|
|
S.5.10.3
|
S.5.8.4
|
The cofferdams should be
regularly inspected and maintained to ensure no spillage of waste or
wastewater into the reservoirs.
|
Point Pollution Control
|
Contractors
|
Before construction of intake
and outfall portals and remain on site until completion of intake
and outfall portals and tunnel construction
|
Water Pollution Control
Ordinance
|
|
S. 5.10.4
|
S. 5.8.5
|
Construction of desilting
facilities within works areas capable of controlling discharge of SS to
comply with WPCO/TM-DSS
|
Point and Non-point Pollution
Control
|
Contractors
|
At all construction areas
of the site during the entire construction period
|
Water Pollution Control
Ordinance
|
|
S.5.10.5
|
S.5.8.6
|
Construction runoff will
be managed as per the Practice Note for Professional Persons ProPECC PN1/94 -
Construction Site Drainage and the conditions of working within Water
Gathering Grounds stipulated by WSD
|
Stormwater and Non-point Source
Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control
Ordinance
Water Gathering Ground
control by WSD
|
|
S.5.10.6
|
S. 5.8.7
|
A Drainage Management Plan
should be prepared by the Contractor for approval by the Engineer for each of
the works areas, detailing the facilities and measures to manage pollution
arising from surface runoff from those works areas
|
Stormwater and Non-point Source
Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control
Ordinance
Water Gathering Ground control by WSD
|
|
S. 5.10.7
|
S. 5.8.8
|
An Emergency Contingency
Plan should also be prepared by the Contractor, detailing the response and
procedures to contain and remove any accidental spillage along the temporary
and permanent roads and at the site at short notice to prevent or minimize
the quantities of contaminants from reaching the reservoirs and local streams
leading to the reservoirs. The Emergency Contingency Plan should be submitted
to the Engineer for approval
|
Stormwater and Non-point Source
Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control
Ordinance
Water Gathering Ground control by WSD
|
|
S. 5.10.8
|
S. 5.8.9
|
§
Surface run-off and
effluent from the construction sites at the intake at Kowloon Byewash Reservoir
and outfall at the Lower Shing Mun Reservoir will be directed towards
adequately designed sand/silt removal facilities such as sand/silt traps and
sediment basins to remove sand/silt particles from runoff to meet the
requirements of the TM standards under the WPCO before discharging to
discharge points downstream of the Kowloon Byewash Reservoir Dam and Lower
Shing Mun Reservoir Dam respectively. The design of efficient silt removal
facilities should be based on the guidelines in Appendix A1 of ProPECC PN
1/94, which states that the retention time for silt/sand traps should be 5
minutes under maximum flow conditions. Sizes may vary depending upon the flow
rate, but for a flow rate of 0.1m3/s a sedimentation basin of 30m3
would be required and for a flow rate of 0.5m3/s the basin would
be 150m3. The detailed design of the sand/silt traps should be
undertaken by the contractor prior to the commencement of construction
|
Stormwater and Non-point Source
Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
§
Channels,
earth bunds or sand bag barriers will be provided on-site to properly direct
stormwater to the above-mentioned facilities
|
Stormwater and Non-point Source
Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
§
Existing on-site silt
removal facilities, channels and manholes, if any, will be maintained and the
deposited silt and grit will be removed regularly, at the onset of and after each
rainstorm to ensure that these facilities are functioning properly at all
times
|
Stormwater and Non-point Source
Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
§
Other
manholes, if any, including any newly constructed ones will be adequately
covered and temporarily sealed so as to prevent silt, construction materials
or debris from getting into the drainage system
|
Stormwater and Non-point Source
Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
§
Open
stockpiles of materials on site will be avoided within water gathering
grounds as far as practicable. All surplus spoil will be removed from water gathering
grounds as soon as possible Measures
will be taken to prevent the washing away of construction materials, soil,
silt or debris
|
Stormwater and Non-point Source
Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
§
Where
possible, works entailing soil excavation will be minimized during the rainy
season (i.e. April to September). If excavation in soil could not be avoided
in these months or at any time of year when rainstorms are likely, for the
purpose of preventing soil erosion, temporary exposed slope surfaces should
be covered e.g. by tarpaulin, and temporary access roads should be protected
by crushed stone or gravel, as excavation proceeds. Intercepting channels
should be provided (e.g. along the crest/edge of excavation) to prevent storm
runoff from washing across exposed soil surfaces. Arrangements should always
be in place to ensure that adequate surface protection measures can be safely
carried out well before the arrival of a rainstorm
|
Stormwater and Non-point Source
Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
§
Where
applicable, final earthworks surfaces/ slopes will be well compacted and hydro-seeded
following completion to prevent erosion
|
Stormwater and Non-point Source Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control
Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
§
Where surface runoff or construction
effluent is likely to be contaminated with oil, properly designed and
maintained petrol interceptor will be provided to meet the WPCO/TM-DSS
requirements. Oil leakage or spillage shall be contained and cleaned up
immediately. Detailed design of the petrol interceptor shall be provided by
the Contractor before commencement of construction
|
Stormwater and Non-point Source Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
§
Sewage
arising from the construction workers on site should be collected by
temporary sanitary facilities e.g. portable chemical toilets. Portable
toilets should be used coupled with tankering away services provided by a
licensed collector
|
Stormwater and Non-point Source
Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
§
All
site discharges within Inland Waters Group A must comply with the terms and
conditions of a valid discharge licence issued by EPD
|
Stormwater and Non-point Source
Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
§
Vehicle
wheel washing facilities should be provided, where applicable, at the site exit
such that mud, debris, etc. deposited onto the vehicle wheels or body can be
washed off before the vehicles are leaving the site area
|
Stormwater and Non-point Source
Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
§
Section
of the road between the wheel washing bay and the public road should be paved
with backfill to reduce vehicle tracking of soil and to prevent site run-off
from entering public road drains
|
Stormwater and Non-point Source Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control
Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
§
Vehicle
washing facilities should be drained into desilting facilities before
discharge. The water should be recycled on site wherever possible. It is suggested
that the wash water from the wheel wash basin is either reused for site
watering or pumped to the on-site desilting facilities for treatment
|
Stormwater and Non-point Source Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control
Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
․
Desilting
facilities should be checked and the deposited silt and grit should be
removed regularly to ensure they are working properly at all times
|
Stormwater and Non-point Source Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control
Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
․
To
minimize water quality impact, recycled water should be used at the cutter
face for cooling purposes. Used water should be collected and discharged to
settling tank for settlement
|
Stormwater and Non-point Source Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control
Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
․
Excess
water from the settling tank would be transferred to the desilting facilities
for treatment before discharge. The Contractor should ensure that the
discharge water from the desilting facilities and treated spent effluent
arising from tunnel boring from the desilting facilities comply with the
WPCO/TM-DSS requirements before discharge
|
Stormwater and Non-point Source Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control
Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
§
Existing on-site silt
removal facilities, channels and manholes, if any, would be maintained such that
the deposited silt and grit will be removed regularly, at the onset of and
after each rainstorm to ensure that these facilities are functioning properly
at all times;
|
Stormwater and Non-point Source Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control
Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
§
Desilting facilities
should be checked and the deposited silt and grit should be removed regularly
to ensure they are working properly at all times;
|
Stormwater and Non-point Source Pollution Control
|
Contractors
|
Ditto
|
Water Pollution Control
Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
§
The
project may occasionally involve the handling of fuel and generates chemical
wastes. It must be ensured that all fuel
tanks and chemical storage are sited on sealed and bunded areas, provided
with locks and located outside water gathering grounds as far as practicable
|
Protection Against Accidental Spillage
|
Contractors
|
Ditto
|
Water Pollution Control Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
§
The
storage areas will be surrounded by bunds with a capacity equal to 110% of
the storage capacity of the largest tank to prevent accidentally spilled oil,
fuel or chemicals from reaching the receiving waters
|
Protection Against
Accidental Spillage
|
Contractors
|
Ditto
|
Water Pollution Control
Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
․
Oil
and grease removal facilities will be provided where appropriate, for example,
in area near plant workshop/ maintenance areas, if any
|
Protection Against Accidental Spillage
|
Contractors
|
Ditto
|
Water Pollution Control Ordinance
|
|
S. 5.10.8
|
S. 5.8.9
|
․
Chemical
waste arising from the site should be properly stored, handled, treated and
disposed of in compliance with the requirements stipulated under the Waste
Disposal (Chemical Waste) (General) Regulation
|
Protection Against Accidental Spillage
|
Contractors
|
Ditto
|
Waste Disposal (Chemical Waste) (General)
Regulation
|
|
Operational Phase
|
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
Table A‑4 Waste Management Implication – Implementation
Schedule of Recommended Mitigation Measures
|
EIA Ref.
|
EM&A Ref.
|
Recommended Environmental Protection Measures/ Mitigation Measures
|
Objectives of the recommended measures & main concerns to address
|
Who to implement the measures?
|
Location/ Timing of implementation of Measures
|
What requirements or standards for the measures to achieve?
|
|
Construction Phase
|
|
S.6.7.1
|
|
Given the potential for
secondary environmental impacts (dust, noise, water quality and visual
impacts), mitigation measures are required to ensure proper handling,
storage, transportation and disposal of materials at the outset and
throughout the construction phase of the project
|
Waste management during construction
|
Contractors
|
At all construction areas
of the site during the entire construction period
|
Waste Disposal Ordinance
|
|
S.6.7.2
|
S. 6.2.5
|
§
An
on-site environmental co-ordinator employed by the Contractor should be identified
at the outset of the works. The
co-ordinator shall prepare a Waste Management Plan (“WMP”) in accordance with
the requirements set out in the ETWB TCW No. 19/2005, Waste Management on
Construction Sites. The WMP shall include monthly and yearly Waste Flow
Tables (“WFT”) that indicate the amounts of waste generated, recycled and
disposed of (including final disposal site), and which should be regularly
updated
|
Waste management during construction
|
Contractors
|
Ditto
|
ETWB TCW No. 19/2005, Waste Management on
Construction Sites
|
|
S.6.7.2
|
S. 6.2.5
|
§
The
reuse/ recycling of all materials on site shall be investigated and exhausted
prior to treatment/ disposal off-site
|
Waste management during construction
|
Contractors
|
Ditto
|
Waste Disposal Ordinance
|
|
S.6.7.2
|
S. 6.2.5
|
§
Good
site practices shall be adopted from the commencement of works to avoid the
generation of waste, reduce cross contamination of waste and to promote waste
minimisation
|
Waste management during construction
|
Contractors
|
Ditto
|
Waste Disposal Ordinance
|
|
S.6.7.2
|
S. 6.2.5
|
§
All
waste materials shall be sorted on-site into inert and non-inert C&D
materials, and where the materials can be recycled or reused, they shall be
further segregated. Inert material, or
public fill will comprise stone, rock, concrete and soil which is suitable
for land reclamation and site formation whilst non-inert materials include
all other wastes generated from the construction process such as plastic
packaging and vegetation (from site clearance)
|
Waste management during construction
|
Contractors
|
Ditto
|
Waste Disposal Ordinance
|
|
S.6.7.2
|
S. 6.2.5
|
§
The
Contractor shall be responsible for identifying what materials can be
recycled/ reused, whether on-site or off-site. In the event of the latter,
the Contractor shall make arrangements for the collection of the recyclable
materials. Any remaining non-inert
waste shall be collected and disposed of to the public fill reception
facilities whilst any inert C&D materials shall be re-used on site as far
as possible. Alternatively, if no use of the inert material can be found
on-site, the materials can be delivered to a public fill reception facilities
after obtaining the appropriate licence
|
Waste management during
construction
|
Contractors
|
Ditto
|
Waste Disposal Ordinance
|
|
S.6.7.2
|
S. 6.2.5
|
§
In
order to monitor the disposal of C&D material and solid wastes at public
fill reception facilities and landfills, and control fly-tipping, a
trip-ticket system shall be implemented by the Contractor, in accordance with
the contract and the requirements of WBTC 31/2004 “Trip Ticket System for
Disposal of Construction and Demolition Material”
|
Waste management during construction
|
Contractors
|
Ditto
|
WBTC 31/2004 “Trip Ticket System for Disposal
of Construction and Demolition Material”
|
|
S.6.7.2
|
S. 6.2.5
|
§
Under
the Waste Disposal (Chemical Waste) (General) Regulation, the Contractor
shall register as a Chemical Waste Producer if chemical wastes such as spent
lubricants and paints are generated on site. Only licensed chemical waste
collectors shall be employed to collect any chemical waste generated at site.
The handling, storage, transportation and disposal of chemical wastes shall
be conducted in accordance with the Code of Practice on the Packaging, Labelling
and Storage of Chemical Wastes and A Guide to the Chemical Waste Control
Scheme both published by EPD
|
Waste management during construction
|
Contractors
|
Ditto
|
Waste Disposal (Chemical Waste) (General)
Regulation
|
|
S.6.7.2
|
S. 6.2.5
|
§
A
sufficient number of covered bins shall be provided on site for the
containment of general refuse to prevent visual impacts and nuisance to the
sensitive surroundings. These bins
shall be cleared daily and the collected waste disposed of to the refuse
transfer station. Further to the issue of ETWB TCW No. 6/2002A, Enhanced
Specification for Site Cleanliness and Tidiness, the Contractor is required
to maintain a clean and hygienic site throughout the project works
|
Waste management during construction
|
Contractors
|
Ditto
|
Waste Disposal Ordinance
|
|
S.6.7.2
|
S. 6.2.5
|
§
All
chemical toilets, if any, shall be regularly cleaned and the night-soil
collected and transported by a licensed contractor to a Government Sewage
Treatment Works facility for disposal
|
Waste management during
construction
|
Contractors
|
Ditto
|
Waste Disposal Ordinance
|
|
S.6.7.2
|
S. 6.2.5
|
§
Toolbox
talks should be provided to workers about the concepts of site cleanliness
and appropriate waste management procedures, including waste reduction, reuse
and recycling
|
Waste management during construction
|
Contractors
|
Ditto
|
Waste Disposal Ordinance
|
|
S.6.7.2
|
S. 6.2.5
|
§
The
Contractor shall comply with all relevant statutory requirements and
guidelines and their updated versions that may be issued during the course of
project construction
|
Waste management during construction
|
Contractors
|
Ditto
|
Waste Disposal Ordinance
|
|
Operational Phase
|
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
Table A‑5 Ecological Impact – Implementation Schedule of Recommended Mitigation
Measures
|
EIA Ref.
|
EM&A Ref.
|
Recommended Environmental Protection Measures/ Mitigation Measures
|
Objectives of the recommended measures & main concerns to address
|
Who to implement the measures?
|
Location/ Timing of implementation of Measures
|
What requirements or standards for the measures to achieve?
|
|
Construction Phase
|
|
S 8.8
|
N/A
|
Minimise the habitat loss of secondary woodland
/ plantation and grassland as far as possible
|
Reduce habitat and vegetation loss
|
Contractors
|
At all construction areas of the site during
the entire construction period
|
Annex 16 of EIAO-TM
|
|
S 8.8
|
N/A
|
Disturbed secondary woodland / plantation and
grassland should be reinstated after the completion of works
|
Reinstate disturbed habitats
|
Contractors
|
Worksite areas at the two portals / after
completion of construction works
|
Annex 16 of EIAO-TM
|
|
S 8.8
|
N/A
|
Provide clear definition
of site boundary
|
Prevent impact on offsite habitats
|
Contractors
|
At all construction areas of the site during
the entire construction period
|
Annex 16 of EIAO-TM
|
|
S 8.8
|
N/A
|
Protect the protected
plant Pavetta hongkongensis on its
existing location;
Transplant the Pavetta hongkongensis to other suitable
location if onsite protection is not feasible.
|
Preserve the protected plant species
|
Contractors
|
On the vegetated slope along the existing
vehicle access at worksite area at Lower Shing Mun Reservoir / Construction
period
|
Annex 16 of EIAO-TM
|
|
S 8.8
|
N/A
|
Carry
out compensatory planting if the individual of Artocarpus hypargyreus cannot be retained onsite
|
Mitigate the tree removal
|
Contractors
|
worksite area at Kwoloon
Byewash Reservoir / Construction Period
|
ETWB TCW No. 3/2006
|
|
S 8.8
|
N/A
|
Workers
should avoid eating and leave food in works area and avoid feeding the
wildlife;
Fishes
observed remaining at the proposed works area during the draining down
process should be translocated to the portion of the reservoir outside the cofferdam.
|
Avoidance of injury to
wildlife
|
Contractors
|
At all construction areas
of the site during the entire construction period
|
Annex 16 of EIAO-TM
|
|
S 8.8
|
N/A
|
Implement standard good
site practices for dust suppression
|
Avoid dust deposition on vegetation
|
Contractors
|
At all construction areas of the site during
the entire construction period
|
EIAO -TM, Air Pollution Control (Construction
Dust) Regulation
|
|
S 8.8
|
N/A
|
Implement standard good site
practices for water quality control
|
Avoid site runoff to nearby habitats
|
Contractors
|
At all construction areas of the site during
the entire construction period
|
Water Pollution Control Ordinance
|
|
S 8.8
|
N/A
|
Workers shall not disturb birds
and other wildlife;
Litter shall not be burned
on-site but shall be removed off-site;
Machinery not in use
should be switched off to minimize the noise nuisance;
No fishing is allowed in
the reservoir without permission.
|
Avoid disturbance to wildlife
|
Contractors
|
At all construction areas of the site during
the entire construction period
|
Annex 16 of EIAO-TM
|
|
Operational
Phase
|
|
S 8.8
|
N/A
|
Compensate the habitat loss (grassland and woodland) by restoration of
same type of habitats to be lost. The compensatory ratio should not be less
than 1:1 in terms of area.
|
Mitigate the temporary habitat loss
|
Contractors
|
Woodland at worksite area at
Kowloon Byewash Reservoir and Grassland at worksite area at Lower Shing Mun
Reservoir / Operational period
|
Annex 16 of EIAO-TM
|
Table A-6 Landscape and Visual Impact –
Implementation Schedule of Recommended Mitigation Measures
|
Id
No.
|
Landscape
and Visual
Mitigation Measures
|
Location
|
Funding
|
Implementation/
Maintenance Agent
|
Relevant
Standard
or Requirement
|
Implementation Stage
|
Timing
of
Implementation
|
Objectives
of the Recommended
Measure and
Main Concern to address
|
|
LMM1
|
Topsoil, where
identified, should be stripped
and stored for re-use in the construction of
the soft landscape works, where practical
|
Site
|
WSD
|
Contractor
|
TM-EIA
Annex 18
|
|
√
|
|
Throughout
construction phase
|
To
provide a viable growing medium suited to the existing conditions and reduce
the need for the importation of top soil
|
|
LMM2
|
Existing Trees to be
retained on site should
be carefully protected during construction
|
Site
|
WSD
|
Contractor
|
TM-EIA
Annex 18,
ETWB TCW No. 2/2004 &
ETWB
TCW No. 3/2006
|
|
√
|
|
Throughout
construction phase
|
To
ensure the success of the
tree preservation proposal
|
|
LMM3
|
Compensatory tree
planting should be provided to compensate for felled trees
|
Site
|
WSD
|
Contractor
|
TM-EIA
Annex 18,
ETWB TCW No. 2/2004 &
ETWB
TCW No. 3/2006
|
|
√
|
|
Throughout
design and construction phase
|
The
planting proposal seeks to compensate for the predicted tree loss resulting
form the construction, visually integrate the proposals within its existing
landscape framework and provide an improved visual amenity
|
|
LMM4
|
Erection of decorative
screen hoarding compatible with surrounding setting
|
Site
|
WSD
|
Contractor
|
TM-EIA
Annex 18 and
BD
|
|
√
|
|
Throughout
construction phase
|
To
integrate the construction site with the existing environment
|
|
LMM5
|
Locations of the site
office, storage or workshops should be carefully adjusted to areas out of tree
protection zones.
|
Site
|
WSD
|
Contractor
|
TM-EIA
Annex 18 and
BD
|
√
|
|
|
Throughout
design phase
|
To
avoid unnecessary felling of trees
|
|
LMM6
|
Selection of intake and
outfall portals to areas enclosed by existing topography or vegetation
|
Site
|
WSD
|
Contractor
|
TM-EIA
Annex 18 and
BD
|
√
|
|
|
Throughout
design phase
|
To
preserve the existing topography and as many as trees as possible
|
|
LMM7
|
Appearance of the
water intake and outfall structures
|
Site
|
WSD
|
Contractor
|
TM-EIA
Annex 18 and
BD
|
√
|
|
|
Throughout
design phase
|
To
reduce the apparent visual mass of water intake and outfall structures
|
|
LMM8
|
Reinstatement of disturbed
vegetation at both portal areas
|
Site
|
WSD
|
Contractor
|
TM-EIA
Annex 18
|
|
|
√
|
After the completion
of construction works
|
To
mitigate disturbance to vegetation arising from the proposed construction
|
Table A-7 Cultural Heritage – Implementation
Schedule of Recommended Mitigation Measures
|
EIA Ref.
|
EM&A Ref.
|
Recommended Environmental Protection Measures/ Mitigation Measures
|
Objectives of the recommended measures & main concerns to address
|
Who to implement the measures?
|
Location/ Timing of implementation of Measures
|
What requirements or standards for the measures to achieve?
|
|
Construction Phase
|
|
S 10.7
|
S8.1.2
|
Condition Survey for the
identified historic items and monitoring of vibration levels if required.
|
Prevention of structural
damage to the identified historic items
|
Contractors
|
Condition survey to be
undertaken prior to the construction phase and vibration monitoring to be
undertaken during the construction phase if required.
|
None
|
|
Operational
Phase
|
|
N/A
|
N/A
|
None
|
None
|
None
|
None
|
None
|
Appendix B Event/ Action Plan
Table B‑1 Event/ Action Plan for Noise Impact
|
Event and Action Plan for Noise Impact
|
|
Event
|
Action
|
|
ET Leader
|
IEC
|
ER
|
Contractor
|
|
Action Level is reached
|
1.
Notify IEC and Contractor
2.
Carry out investigation
3.
Report the results of the investigation to
the IEC and Contractor
4.
Discuss with the Contractor and formulate
remedial measures
|
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.
Require Contractor to propose remedial
measures for the analyzed noise problem
4.
Ensure remedial measures are properly
implemented
5.
|
1.
Submit noise mitigation proposal to IEC
2.
Implement noise mitigation proposals
|
|
Limit Level is reached
|
1.
Notify IEC, ER, EPD and Contractor
2.
Identify source
3.
Repeat measurement to confirm findings
4.
Carry out analysis of Contractor's working
procedures to determine possible mitigation to be implemented
5.
Inform IEC, ER and EPD the causes &
actions taken for the exceedances
6.
Assess effectiveness of Contractor's
remedial actions and keep IEC, EPD and ER informed of the results
7.
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.
Require Contractor to propose remedial
measures for the analyzed noise problem
4.
Ensure remedial measures are properly
implemented
5.
If exceedance continues, consider what
portion of the work is responsible and instruct the Contractor to stop that
portion or 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
|
Table B‑2 Event/ Action Plan for Water Quality
Impact
|
EVENT
|
ACTION
|
|
ET
|
IEC
|
ER
|
CONTRACTOR
|
|
Action
level being exceeded by one sampling day
|
1. Repeat
in-situ measurement to confirm findings and repeat measurement on next day of exceedance being recorded;
2. Identify
source(s) of impact;
3. Inform IEC, contractor, ER and EPD;
4. Check monitoring data, all plant,
equipment and Contractor’s working
methods;
5. Discuss
mitigation measures with IEC, ER and Contractor;
|
1. Check monitoring data submitted by ET
and Contractor’s working methods.
2. Discuss with ET and Contractor on possible mitigation measures;
3. Review the proposed mitigation measures submitted
by Contractor and advise the ER accordingly;
|
1. Confirm receipt of
notification of failure in writing
2. Discuss with IEC,
ET and Contractor on the proposed mitigation.
3. Request Contractor to view the working
methods.
4. Ensure mitigation measures are properly
implemented.
|
1. Inform the ER and confirm notification of the
non-compliance in writing;
2. Rectify unacceptable practice;
3 Check
all plant and equipment and consider changes of working methods;
4. Discuss
with ET, IEC and ER and propose mitigation measures to ER and IEC within 3
working days;
5. Implement the agreed mitigation measures.
|
|
Limit level being exceeded by more than one
consecutive sampling days
|
1. Repeat in-situ measurement to confirm
findings and repeat
measurement on next day of exceedance being recorded;
2. Identify
source(s) of impact;
3. Inform IEC, Contractor, ER and EPD;
4.
Check monitoring data, all plant,
equipment and Contractor’s working
methods;
5. Discuss mitigation measures with IEC, ER
and Contractor;
6. Ensure
mitigation measures are implemented;
7. Increase
the monitoring frequency to daily until no exceedance of Limit level for two
consecutive days.
|
1.
Check monitoring data submitted by ET and Contractor’s working
methods.
2.
Discuss with ET and Contractor on possible mitigation measures;
3.
Review the proposed mitigation measures submitted by Contractor and
advise the ER accordingly;
4.
Supervise the implementation of mitigation measures.
|
1. Discuss with IEC, ET and Contractor on the
proposed mitigation measures;
2. Request Contractor to critically review the
working methods;
3. Make agreement on the mitigation measures
to be implemented;
4. Ensure mitigation measures are properly
implemented;
5. Consider and instruct, if necessary, the
Contractor to slow down or to stop all or part of the construction activities
until no exceedance of Limit level.
|
1. Take
immediate action to avoid further exceedance
2. Discuss
with ET, IEC and ER and propose mitigation measures to ER and IEC;
3. Implement the agreed mitigation measures;
4. Resubmit proposals of mitigation measures if
problem still not under control;
5. As directed by the Engineer, to slow down or
to stop all or part of the construction activities until no exceedance of
Limit level.
|
Table B‑3 Event/ Action Plan for Landscape &
Visual Impact
|
EVENT
|
ACTION
|
|
Environmental
Specialist (ES)
|
IEC
|
Franchisee’s
Site Representative (FSR)
|
CONTRACTOR
|
|
Non-conformity on one
occasion
|
1. Identify Source;
2. Inform the Contractor, IC(E) and the FSR;
3. Discuss remedial actions with
the IC(E), the FSR and the Contractor; and
4. Monitor remedial actions
until rectification has been completed
|
1. Check report;
2. Check
the Contractor's working method;
3. Discuss
with the ES and the Contractor on
possible remedial measures;
4. Advise
the FSR on effectiveness of proposed remedial measures; and
5. Check
implementation of remedial measures.
|
1. Notify
Contractor; and
2. Ensure
remedial measures are properly implemented.
|
1. Amend
working methods;
2. Rectify
damage and undertake any necessary replacement.
|
|
Repeated
Non-conformity
|
1. Identify Source;
2. Inform the Contractor, ICE
and the FSR;
3. Increase monitoring
frequency;
4. Discuss remedial actions with
the IC(E), the FSR and the Contractor;
5. Monitor remedial actions
until rectification has been completed; and
6. If
exceedance stops, cease additional monitoring.
|
1. Check monitoring
report;
2. Check
the Contractor's working method;
3. Discuss
with the ES and the Contractor on possible remedial measures;
4. Advise
the FSR on effectiveness of proposed remedial measures; and
5. Supervise
implementation of remedial measures.
|
1. Notify
the Contractor; and
2. Ensure
remedial measures are properly implemented.
|
1. Amend
working methods; and
2. Rectify
damage and undertake any necessary replacement.
|
Appendix C Typical Proforma for EM&A
