CONTRACT NO:
HY/2019/14
New Wang Tong
River Bridge
Under
Environmental Permit no. EP-555/2018/A
Monthly
Environmental Monitoring & Audit Report
August 2021
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CLIENTS: |
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Highways Department |
Lam Environmental Services Limited 19/F Remex Centre, 42 Wong Chuk Hang Road, Hong Kong Telephone:
(852) 2882-3939 Facsimile:
(852) 2882-3331 E-mail:
info@lamenviro.com Website:
http://www.lamenviro.com |
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Certified by: |
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_______________________________ Raymond Dai Environmental Team
Leader |
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DATE: |
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14 September 2021 |
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1.1.......... Scope
of the Report
1.2.......... Structure
of the Report
2.2.......... Project
Organization and Contact Personnel
2.3.......... Construction
Activities
3 Status of
Regulatory Compliance
3.1.......... Status
of Environmental Licensing and Permitting under the Project
3.2.......... Status
of Submission under the EP-555/2018/A..
4.1.......... Noise
Monitoring
4.3.......... Water
Quality Monitoring
5.1.......... Noise
Monitoring Results
5.2.......... Air
Monitoring Results
5.3.......... Water
Quality Monitoring Results
5.4.......... Waste
Management
6.1.......... Noise
Monitoring.
6.2.......... Air Quality Monitoring
6.3.......... Water
Quality Monitoring
6.4.......... Review
of the Reasons for and the Implications of Non-compliance
6.5.......... Summary
of action taken in the event of and follow-up on non-compliance
8. Complaints, Notification of Summons and
Prosecution
lIST OF TABLES
Table
2.2 Contact Details of Key Personnel
Table 3.2 Summary of submission status under
EP-555/2018/A
Table 4.1 Noise Monitoring Station
Table 4.2 Noise Monitoring Equipment
Table 4.3 Action and Limit Level for Noise Monitoring
Table 4.4 Air Monitoring Station
Table 4.5 Air Quality Monitoring Equipment
Table 4.6 Action and Limit Level for Air Quality
Monitoring
Table 4.7 Marine Water Quality Stations for Water
Quality Monitoring
Table 4.8 Water Quality Monitoring Equipment
Table 4.9 Action and Limit Level for Water Quality
Monitoring
Table 5.1 Summary of Quantities of Inert C&D
Materials
Table 5.2 Summary of Quantities of C&D Wastes
Table 8.1 Cumulative Statistics on Complaints
Table 8.2 Cumulative Statistics on Successful
Prosecutions
Table 9.1 Construction Activities and Recommended
Mitigation Measures in Coming Reporting 3 Months
lIST
OF FIGUREs
Figure 2.2 Project Organization Chart
Figure
4.1 Locations of Noise Monitoring Station
Figure
4.2 Locations of Air Quality Monitoring
Stations
Figure 4.3 Locations
of Water Quality Monitoring Stations
lIST
OF APPENDIces
Appendix 3.1 Environmental Mitigation Implementation
Schedule
Appendix
4.1 Action and Limit Level
Appendix 4.2 Copies of Calibration Certificates
Appendix 4.3 Wind data extracted from HKO Automatic
Weather Station
Appendix
5.1 Monitoring Schedule for Reporting
Month
Appendix
5.2 Noise Monitoring Results and
Graphical Presentations
Appendix 5.3 Air Quality Monitoring Results and Graphical
Presentations
Appendix 5.4 Water Quality Monitoring Results and
Graphical Presentations
Appendix
5.5 Monthly Summary Waste Flow Table
Appendix 6.1 Event and Action Plans
Appendix 6.2 Summary for Notification of Exceedance
Appendix
9.1 Construction Programme of
Individual Contracts
EXECUTIVE SUMMARY
i.
This is the
Environmental Monitoring and Audit (EM&A) Monthly Report
– August 2021 of New Wang Tong River Bridge under Environmental
Permit no. EP-555/2018/A (Hereafter as “the Project”). The construction works
of the Project was commenced on 12 July 2021 and the tentative completion date
is Q3 2024. This is the 2nd
EM&A
report presenting the environmental monitoring findings and information
recorded during the period of 01 August 2021 to 31 August 2021. The cut-off date
of reporting is at the end of each reporting month.
ii.
In the reporting
month, the principal work activities conducted are as follow:
·
No major site activity was in-progress.
Air Quality Monitoring
iii.
1-hour and 24-hour Total Suspended Particulates (TSP) monitoring was conducted at
two monitoring station. 24-hour TSP shall be sampled at least once in every 6
days, while sampling for 1-hour TSP shall be at least 3 times in every 6 day in
the reporting month.
iv.
No action or limit level exceedance was
recorded in this reporting period.
Noise Monitoring
v.
Noise monitoring was conducted at one noise
monitoring station once per week in the reporting month.
vi.
No action or limit level exceedance was
recorded in this reporting period.
Water Quality Monitoring
vii.
No water quality monitoring was conducted at seven
monitoring stations three days per week in the reporting month due
to no marine-based construction works.
viii.
Owing to accessibility and safety issues, water
quality monitoring at Station W3 was cancelled with verification from the IEC
in November 2020 and approval from the EPD in December 2020.
Site Inspections and Audit
ix.
The Environmental Team (ET) conducted weekly site inspections
on 5, 12, 19 and 27 August 2021. IEC attended the joint site inspection on 27 August 2021. No non-compliance was found during
the site inspection while reminders on environmental measures were recommended.
x.
The
Environmental Team (ET) conducted monthly landscape site inspections on 21
August 2021. No non-compliance was found during the site
inspection.
Complaints,
Notifications of Summons and Successful Prosecutions
xi.
No environmental
complaint, notification of summons and successful prosecution regarding the construction
works was recorded in the reporting period.
Reporting
Changes
xii.
There are
no particular reporting changes.
Future Key
Issues
xiii.
In coming reporting
3 months, the scheduled construction activities and the recommended mitigation
measures are listed as follows:
|
Recommended Mitigation Measures |
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·
Tree
felling ·
Cofferdam
construction ·
Construction
plants mobilization |
·
Dust
control during dust generating works; ·
Implementation
of proper noise pollution control; ·
Provision
of protection to ensure no runoff out of site area or direct discharge into
Wang Tong River; and ·
Proper
waste handling and storage; |
1.1.1. Lam Environmental Services Limited
(LES) has been appointed to work as the Environmental Team (ET) under
Environmental Permit (EP) no. EP-555/2018/A to implement the Environmental
Monitoring and Audit (EM&A) programme as stipulated in the EM&A Manual
of the approved Environmental Impact Assessment (EIA) Report for New Wang Tong
River Bridge (Register No.: AEIAR-199/2016).
1.1.2. In accordance with Clause 3.4
stated in EP-522/2018/A, 1 hard copy and 1 electronic copy of Monthly EM&A
Report shall be submitted to the Director within 10 working days after the end
of each reporting month.
1.1.3. According to Section 10.3.1 of the
Project EM&A Manual, the Monthly EM&A Report should be submitted within
10 working days of the end of each reporting month, with the first report due
in the month after construction commences.
Section
1 Introduction –
details the scope and structure of the report.
Section
2 Project Background –
summarizes background and scope of the project, site description, project
organization and contact details of key personnel during the reporting period.
Section
3 Status of Regulatory Compliance –
summarizes the status of valid Environmental Permits / Licenses during the
reporting period.
Section
4 Monitoring Requirements –
summarizes all monitoring parameters, monitoring methodology and equipment,
monitoring locations, monitoring frequency, criteria and respective event and
action plan and monitoring programmes.
Section
5 Monitoring Results –
summarizes the monitoring results obtained in the reporting period.
Section
6 Compliance Audit – summarizes the auditing of monitoring
results, all exceedances environmental parameters.
Section
7 Environmental Site Audit –
summarizes the findings of weekly site inspections undertaken within the
reporting period, with a
review of any
relevant follow-up actions within
the reporting period.
Section
8 Complaints, Notification of
summons and Prosecution – summarizes the cumulative statistics on complaints,
notification of summons and prosecution
Section
9 Conclusion
2.1.1. Silver Mine Bay is a popular
bathing beach in Mui Wo, Lantau that attracted 4,550 visitors on a peak day and
over 69,000 visitors utilized the beach in 2012.
2.1.2. In order to relieve the
overcrowding problem and the road safety concern of Wang Tong Bridge (hereafter
called “Old Bridge”), two bridges (pedestrian bridge and cycle bridge) are
proposed to replace the Old Bridge. The new pedestrian bridge and the new cycle
bridge (hereafter called “New Bridge”) are also designed to align with the
future amenity development on the northern side of the Old Bridge. The location
of the project site is shown in Figure 2.1.
2.1.3. The Project consists of a
designated project under Part I, Schedule 2 of the Environmental Impact
Assessment Ordinance (EIAO) which is Item C.12 – (a)…a dredging operation which
is less than 500m from the nearest boundary of an existing…(iii) bathing beach…
2.1.4. The major components of the
Project under Environmental Permit (EP) (EP No. EP-555/2018/A) comprises: (i)
demolition of the existing Wang Tong River Bridge; and (ii) construction of a
new twin bridge with segregation for pedestrians and cyclists.
2.2.1 Highways Department is the overall
project controllers for the Project. For the construction phase of the Project,
Contractor(s), Environmental Team and Independent Environmental Checker are
appointed to manage and control environmental issues.
2.2.2 The project organization and lines
of communication with respect to environmental protection works are shown in Figure 2.2. Key personnel and contact
particulars are summarized in Table 2.2:
Table 2.2 Contact Details of Key Personnel
|
Party |
Role |
Post |
Name |
Contact
No. |
Contact
Fax |
|
Highways
Department (HyD) |
Project
Proponent and Engineer’s Representative |
Principal
Project Coordinator |
Mr.
Leo Poon |
3903 6758 |
3188 3418 |
|
Unison
Construction Engineering Limited |
Contractor |
Site Agent |
Mr.
David Chiu |
2690 2232 |
2363 3199 |
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Environmental
Officer |
Mr.
Chiu Tse |
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Independent Environmental Checker (IEC) |
Independent Environmental Checker (IEC) |
Mr.
James Choi |
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Environmental Team (ET) |
Environmental Team Leader (ETL) |
Mr.
Raymond Dai |
2882 3939 |
2882 3331 |
2.3.1 In the reporting month, the
principal work activities conducted are as follow.
·
Tree
felling
·
Cofferdam
construction
·
Construction
plants mobilization
2.3.2 In coming reporting 3 months, the scheduled
construction activities are listed as follows:
·
Tree
felling
·
Cofferdam
construction
·
Construction
plants mobilization
3.1.1.
A summary
of the current status on licences and/or permits on environmental protection
pertinent to the Project is shown in Table 3.1.
Table 3.1 Summary of the current
status on licences and/or permits on environmental protection pertinent to the
Project
|
Permits and/or Licences |
Permit. No. / Account No. |
Valid From |
Expiry Date |
Status |
|
Notification pursuant to Air Pollution
Control (Construction Dust) Regulation |
Form NA submitted to EPD on 25 June 2021. |
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Environmental Permit |
EP-555/2018/A |
16 Dec 2020 |
N/A |
Valid |
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Billing Account
for Disposal of Construction Waste |
7038550 |
29 Mar 2021 |
End of the Project |
Valid |
|
Registration as a
Chemical Waste Producer |
5213-962-U2333-01 |
28 Jun 2021 |
N/A |
Valid |
|
Water Pollution
Ordinance Licence |
Under liaison
with EPD Regional Office |
|||
|
Construction Noise
Permit |
N/A |
|||
3.2.1.
A
summary of the current status on submission under EP-555/2018/A is shown in Table
3.2.
Table 3.2 Summary of submission status
under EP-555/2018/A
|
Submission |
Date
of Latest Submission^ or Approval# |
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|
Condition 1.12 |
Notification of Commencement Date of
Works |
3 June 2021 ^ |
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Condition 2.7 |
Submission of Management Organization of
Main Construction Companies, the ET and the IEC |
20 May 2021 ^ |
|
Condition 2.8 |
Submission of Construction Works
Schedule and Location Plan |
22 June 2021 # |
|
Condition 2.9 |
Submission of Breeding Bird Survey
Report |
29 December 2020 # |
|
Condition 3.3 |
Submission of Baseline Monitoring
Report |
24 June 2021 # |
|
Condition 4.2 |
Setting up Dedicated Internet Website |
28 April 2021 ^ |
Noise Monitoring Stations
4.1.1.
The
noise monitoring stations for the Project are listed and shown in Table
4.1 and Figure 4.1.
Table 4.1 Noise Monitoring Station
Remarks A: As discussed with
the lot owner, a fine adjustment of location at the boundary of 1 Tung Wan Tau
Road was proposed and approved in the Baseline Monitoring Report, in order to
prevent access obstruction.
Noise Monitoring Parameters, Frequency and Duration
4.1.2.
For
daytime construction work on normal weekdays (0700-1900 Monday to Saturday),
one set of 30-min measurement shall be carried out at each NMS every week. Measurement
procedures shall be referred to the Noise Control Ordinance-TM. Construction
noise level shall be measured in terms of the A-weighted equivalent continuous
sound pressure level (Leq). Leq 30min shall be used as
the monitoring parameter. As supplementary information for data auditing,
statistical results such as L10 and L90 shall also be
obtained for reference.
Monitoring Equipment
4.1.3.
Noise monitoring was
performed using sound level meter at
the designated monitoring locations. The sound level meters shall comply with the International Electrotechnical Commission Publications
651:1979 (Type 1) and
804:1985 (Type 1)
specifications.
Acoustic calibrator shall
be deployed to check the sound level meters at a known sound pressure level. Brand and model of the equipment is given in Table
4.2.
Table 4.2 Noise Monitoring Equipment
4.1.4.
The calibration certificates of the
noise monitoring equipment are attached in Appendix 4.2.
Sampling Procedure and Monitoring Equipment
4.1.5.
Monitoring
Procedure
(a)
The monitoring station shall normally be at a point 1m from the exterior
of the sensitive receiver’s building façade and be at a position 1.2m above the
ground.
(b)
Façade measurements were made at the monitoring locations. For
free-field measurement, a correction
factor of +3 dB (A) would be applied.
(c)
The battery condition was checked to ensure the correct functioning of
the meter.
(d)
Parameters such as frequency weighting, the time weighting and the
measurement time were set as follows:
(e)
Frequency weighting: A, Time weighting: Fast, Measurement time set:
continuous 5 mins
(f)
Prior and after to the noise measurement, the meter was checked using
the acoustic calibrator for 94dB (A) at 1000 Hz. If the difference in the
calibration level before and after measurement was more than ±1 dB (A), the
measurement would be considered invalid and repeat of noise measurement would
be required after re-calibration or repair of the equipment.
4.1.6.
Maintenance
and Calibration
(a)
The microphone head of the sound level meter was cleaned with soft cloth
at regular intervals.
(b)
The sound level meter and calibrator were calibrated at yearly
intervals.
EVENT and action plan
4.1.7.
Noise Standards for Daytime
Construction Activities are specified under EIAO-TM. The Action and Limit
levels for construction noise are defined in Table 4.3 and Appendix
4.1. Should non-compliance
of the criteria occurs, action in accordance with the Event and Action Plan in Appendix 6.1
shall be carried out.
Table 4.3 Action and Limit Level for
Noise Monitoring
Air Quality Monitoring Stations
4.2.1.
The
air monitoring stations for the Project are listed and shown in Table 4.4
and Figure
4.3.
Table 4.4 Air Monitoring Station
|
Monitoring
Station |
Location |
Level (in terms of no. of floor) |
|
AMS1 A |
Silvermine Beach Resort |
G/F |
|
AMS2 B |
1 Tung Wan Tau Road |
G/F |
Remarks A: AMS1 recommended
under EM&A manual is at the north of boundary wall of Silvermine Beach
Resort. Positioning of HVS on a narrow road at the northern boundary wall would
obstruct access of passengers. After liaison with the resort owner, HVS is
located near the eastern boundary wall, which is representative and suitable
for air quality monitoring. Thus, fine adjustment of location at the boundary
of Silvermine Beach Resort was therefore proposed and approved in the Baseline
Monitoring Report.
Remarks B: As discussed with the lot owner, a fine
adjustment of location at the boundary of 1 Tung Wan Tau Road was proposed and
approved in the Baseline Monitoring Report, in order to prevent access
obstruction and to minimize noise nuisance induced from HVS operation.
Air Monitoring Parameters, Frequency and Duration
4.2.2.
One-hour
and 24-hour TSP levels should be measured to indicate the impacts of
construction dust on air quality.
4.2.3.
24-hour
TSP shall be sampled at least once in every 6 days, while sampling for 1-hour
TSP shall be at least 3 times in every 6 days when the highest dust impact
takes place.
Sampling Procedure and Monitoring Equipment
4.2.4.
24-hour
TSP Measuring Installation (HVS)
(a)
The HVS was installed in the vicinity of the air sensitive receivers.
The following criteria were considered in the installation of the HVS.
(b)
No furnace or incinerator flues were nearby.
(c)
Airflow around the sampler was unrestricted
(d)
0.6 - 1.7 m3 per minute adjustable flow range
(e)
Equipped with a timing / control device with +/- 5 minutes accuracy for 24
hours operation;
(f)
Installed with elapsed-time meter with +/- 2 minutes accuracy for 24
hours operation;
(g)
Equipped with a shelter to protect the filter and sampler;
(h)
Capable of operating continuously for a 24-hour period.
4.2.5.
24-hour
Measuring Procedures
(a)
The power supply was checked to ensure the HVS works properly.
(b)
The filter holder and the area surrounding the filter were cleaned.
(c)
The filter holder was removed by loosening the four bolts and a new
filter, with stamped number upward, on a supporting screen was aligned
carefully.
(d)
The filter was properly aligned on the screen so that the gasket formed
an airtight seal on the outer edges of the filter.
(e)
The swing bolts were fastened to hold the filter holder down to the
frame. The pressure applied should be sufficient to avoid air leakage at the
edges.
(f)
Then the shelter lid was closed and was secured with the aluminum strip.
(g)
The HVS was warmed-up for about 5 minutes to establish run-temperature
conditions.
(h)
A new flowrate record sheet was set into the flow recorder.
(i)
The flow rate of the HVS was checked and adjusted at around 1.2 m3
/min. The range specified in the EM&A Manual was between 0.6-1.7 m3
/min.
(j)
The programmable timer was set for a sampling period of 24 hrs + 1 hr,
and the starting time, weather condition and the filter number were recorded.
(k)
The initial elapsed time was recorded.
(l)
At the end of sampling, the sampled filter was removed carefully and
folded in half-length so that only surfaces with collected particulate matter
were in contact.
(m)
It was then placed in a clean plastic envelope and sealed.
(n)
All monitoring information was recorded on a standard data sheet.
(o)
Filters were sent to laboratory for further testing.
4.2.6.
1-hour
Measuring Procedures
(a)
Check the calibration period of portable direct reading dust meter prior
to monitoring (The direct reading dust meter was calibrated at 2-years interval
and checked with High Volume Sampler (HVS) yearly, details refer to Section
2.5.4)
(b)
Record the site condition near / around the monitoring stations.
(c)
Install the portable direct reading dust meter to the monitoring
location.
(d)
Slide the power switch to turn the power on.
(e)
Check of portable direct reading dust meter to ensure the equipment
operation in normal condition.
(f)
Select the period of measurement to 60mins.
(g)
Check and set the correct time.
(h)
Select the appropriate unit display for the equipment.
(i)
Slide the power switch to turn the power off when the monitoring period
ended (3 times 1 hour TSP monitoring per day).
(j)
Uninstall the portable direct reading dust meter
(k)
Collected the sampled data for analysis.
Remark: Procedures (c) to (h) may be
different subject to the brands and models of portable direct reading dust.
4.2.7.
Maintenance
and Calibration
(a)
The direct reading dust meter was calibrated at 2-years interval and
checked with High Volume Sampler (HVS) yearly to determine the accuracy and
validity of the results measured.
(b)
Checking of direct reading dust meter will be carried out in order to
determine the conversion factor between the direct reading dust meter and the
standard equipment, HVS. The comparison check is to be considered valid based
on correlation coefficient checked by HOKLAS laboratory
4.2.8.
High Volume Sampler (HVS – Model TE-5170) completed with the appropriate
sampling inlets were installed for the 24-hour TSP sampling. 1-hour TSP air
quality monitoring was performed by using portable direct reading dust meters
at each designated monitoring station, which was verified by IEC and approved
by the Engineer’s Representative (ER) on 4 December 2020 according to Section
3.4.5 and 3.3.2 of the Project EM&A Manual. The brand and model of the equipment are given in Table 4.5.
Table 4.5 Air Quality Monitoring
Equipment
|
Equipment |
Brand
and model |
Series
Number |
|
Portable
direct reading dust meter |
||
|
High
Volume Sampler |
4.2.9.
The
calibration certificates of the air quality monitoring equipment are attached
in Appendix 4.2.
Wind Data
4.2.10.
Hong
Kong Observatory (HKO) meteorological information is widely accepted to be used
in various environmental monitoring practices within HKSAR due to its
professional quality and precision. Therefore, the daily wind data including
Prevailing Wind Direction (degrees) and Mean Wind Speed (km/h) were obtained
from Peng Chau Automatic Weather Station to serve as the representative data
for meteorological condition during monitoring. The method was agreed by the
IEC and approved by the ER on 4 December 2020. The representative wind data
from Peng Chau Station were obtained covering the 1-hour and 24-hour TSP
monitoring periods. The wind data were extracted and
shown in Appendix 4.3.
EVENT and action plan
4.2.11.
The
Action and Limit levels for construction air quality are defined in Table 4.6 and Appendix
4.1. Should non-compliance of the air quality criteria occur,
action in accordance with the Event and Action Plan in Appendix
6.1 shall be carried out.
Table 4.6 Action and Limit Level for
Air Quality Monitoring
|
Parameter |
Monitoring Station |
Action Level (µg/m3) |
Limit Level (µg/m3) |
|
24-hour TSP Level |
AMS1 |
176.0 |
260.0 |
|
AMS2 |
176.0 |
260.0 |
|
|
1-hour TSP Level |
AMS1 |
276.5 |
500.0 |
|
AMS2 |
283.7 |
500.0 |
WATER
QUALITY MONITORING STATIONS
4.3.1.
Water
quality monitoring was undertaken at 7 monitoring stations in the reporting
month. The proposed water quality monitoring stations of the Project are shown
in Table 4.7 and Figure 4.3.
Table 4.7 Marine Water Quality Stations for Water Quality Monitoring
|
Station |
Description |
Monitoring Period |
Monitoring Station |
Easting |
Northing |
|
W1 |
Wang Tong River (Major tributary) |
Mid-Flood |
Impact |
817747 |
814519 |
|
Mid-Ebb |
Control |
||||
|
W2 |
Wang Tong River (Major tributary) |
Mid-Flood |
Impact |
817775 |
814471 |
|
Mid-Ebb |
Control |
||||
|
W3 * |
Wang Tong River (Minor tributary to Tai Wai Yuen) |
Mid-Flood |
Impact |
817803 |
814537 |
|
Mid-Ebb |
Control |
||||
|
W4 |
Wang Tong River (Minor tributary to Tai Wai Yuen) |
Mid-Flood |
Impact |
817825 |
814481 |
|
Mid-Ebb |
Control |
||||
|
W5 |
Silvermine Bay (Near Silvermine Bay Beach) |
Mid-Flood |
Control |
817909 |
814452 |
|
Mid-Ebb |
Impact |
||||
|
W6 |
Silvermine Bay (Near Silvermine Bay Beach) |
Mid-Flood |
Control |
818024 |
814447 |
|
Mid-Ebb |
Impact |
||||
|
W7 |
Silvermine Bay (Open Water) |
Mid-Flood |
Control |
818061 |
814277 |
|
Mid-Ebb |
Impact |
||||
|
W8 |
Silvermine Bay (Open Water) |
Mid-Flood |
Control |
818224 |
814444 |
|
Mid-Ebb |
Impact |
Remark *: Water quality monitoring at Station W3 was cancelled with verification
from the IEC and approval from the EPD.
Water Quality Parameters, Frequency and Duration
4.3.2.
The
levels of dissolved oxygen (DO), turbidity, salinity and pH shall be measured in
situ while suspended solids (SS) is determined by laboratory analysis at all
the designated monitoring stations.
4.3.3.
In
association with the water quality parameters, other relevant data shall also
be recorded, such as monitoring location / position, time, water temperature,
DO saturation, weather conditions, and any special phenomena underway near the
monitoring station.
4.3.4.
Impact
Monitoring shall be carried out 3 days per week, at mid-flood and mid-ebb tides
(within ± 1.75 hour of the predicted time). The interval between two sets of
monitoring shall not be less than 36 hours. The monitoring period should avoid
concurrent marine project in the vicinity.
4.3.5.
The
sampling frequency of at least three days per week should be undertaken when
the highest dust impact occurs. Upon completion of the construction works, the
monitoring exercise at the designated monitoring locations should be continued
for four weeks in the same manner as the impact monitoring. In case exceedance
of Action/Limit Level is recorded, the frequency shall be increased as per the
Event and Action Plan.
4.3.6.
To
ensure the robustness of in-situ measurement, parameters shall be measured in
duplicate. In case the difference between duplicates is larger than 25%, a
third set of measurement shall be carried out.
Sampling Procedures and Monitoring Equipment
Dissolved
Oxygen, pH And Temperature Measuring Equipment
4.3.7.
The
instrument should be a portable, weatherproof dissolved oxygen and pH measuring
instrument complete with cable, sensor, comprehensive operation manuals, and
use a DC power source. It should be capable of measuring:
·
a dissolved oxygen
level in the range of 0-20 mg/l and 0-200% saturation
·
a pH level in the
range of 0 to 14 units
·
a temperature of
0-45 degree Celsius
4.3.8.
It
should have a membrane electrode with automatic temperature compensation
complete with a cable. Sufficient stocks of spare electrodes and cables should
be available for replacement where necessary. Salinity compensation shall be
build-in in the DO equipment
Turbidity
Measurement Instrument
4.3.9.
Nephelometric
method shall be used in measuring turbidity in-situ. The instrument shall
be portable, weatherproof complete with
a cable, sensor, comprehensive operation manuals and DC power source. It shall
have a photoelectric sensor capable of measuring turbidity between 0-1000 NTU
and complete with a cable with at least 25 m in length. The meter shall be
calibrated in order to establish the relationship between NTU units and
suspended solids level. Turbidity shall be measured on split water sample collected
from the same depths of suspended solid samples.
Sampler
4.3.10. 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 shall be used. The water sampler
shall have a positive latching system to keep it open and prevent premature
closure until released by a messenger when the sampler is at the selected water
depth.
Sampler
Container and Storage
4.3.11. A water sampler, Water samples for suspended solids
measurement should be collected in high-density polythene bottles, packed in
ice (cooled to 4°C without being frozen), and delivered to ALS Technichem (HK)
Pty Ltd. as soon as possible after collection for analysis.
Water Depth
Detector
4.3.12. A portable, battery-operated echo sounder shall
be used for the determination of water depth at each designated monitoring
station. This unit can either be handheld or affixed to the bottom of the
workboat, if the same vessel is to be used throughout the monitoring programme.
Salinity
4.3.13.
A
portable salinometer capable of measuring salinity in the range of 0-40% shall
be provided for measuring salinity of the water at each of monitoring location.
Monitoring Position Equipment
4.3.14.
A hand-held or
boat-fixed type digital Global Positioning System (GPS) with waypoint bearing
indication or other equivalent instrument of similar accuracy shall be provided
and used during monitoring to ensure the monitoring vessel is at the correct
location before taking measurements.
Monitoring Methodology
4.3.15.
Monitoring
Procedure
(a)
The condition near the monitoring stations shall be observed
and recorded on the data log sheet.
(b)
Check of sensors and electrodes with certified standard
solutions before each use.
(c)
Wet bulb calibration for a DO meter should be carried out
before measurement.
(d)
Water depth should be recorded by detector before sampling.
(e)
Sample would be taken using bucket sampler at surface level.
(f)
Transfer the sampled water carefully into cleaned water bottles
(2x 1000ml) provided by the laboratory at the spot after the collection of the
water sample for the subsequent laboratory Suspended Solid testing.
(g)
Transfer the sampled water from the bucket sampler to the
rinsed water container for in-situ measurement (In case of the in-situ
measurement cannot be carried at spot due to safety and adverse weather
condition, sampled water from the bucket sampler will be transfer to cleaned
water bottles provided by laboratory. Then, In-situ measurement will be conducted
at a safe location which sampled water inside cleaned water bottle will be
transfer to the rinsed water container for in-situ measurement) In-situ
measurement shall be measured in duplicate.
(h)
Parameters including Water Temperature (℃), pH (units),
Salinity (ppt), DO (mg/L), DO saturation (%) will be measured by the
Multifunctional Meter and Turbidity (NTU) will be measured by turbid meter.
(Water Temperature and Salinity will be measured as reference parameters)
(i)
Record the result on the data log sheet and record any special finding
during / after in-situ measurement.
(j)
The water sample bottles will be stored in a cool box (at cooled to 4℃ without being frozen), which shall be delivered to HOKLAS laboratory
(ALS Technichem (HK) Pty Ltd) for further testing to determine the level of SS.
4.3.16.
Maintenance
and Calibration
(a)
The responses of sensors and electrodes of the water quality monitoring
equipment were cleaned and checked at regular intervals.
(b)
DO meter (Multifunctional Meter) and turbid meter was certified by a laboratory
accredited under HOKLAS or any other international accreditation scheme, and
subsequently re-calibrated at three monthly intervals.
4.3.17.
Brand
and model of the equipment are given in Table
4.8.
Table 4.8 Water Quality Monitoring Equipment
|
Equipment |
Brand and model |
Series Number |
|
Multifunctional Meter |
YSI Professional Plus |
|
|
Turbid meter |
Xin Rui WGZ-3B |
4.3.18.
Due to no
marine-based construction works, water quality monitoring was not conducted. Calibration certificates of the water
quality monitoring equipment to be attached in Appendix 4.2 will be prepared in the upcoming reporting month during commencement of
monitoring.
Laboratory Measurement / Analysis
4.3.19.
Analysis
of suspended solids will be carried out in a HOKLAS accredited laboratory,
which is ALS Technichem
(HK) Pty Ltd.
EVENT and action plan
4.3.20.
The
Action and Limit levels for construction water quality are defined in Table 4.9 and Appendix
4.1. Should the monitoring results of the water quality parameters
at any designated monitoring station exceed the water quality criteria, action
in accordance with the Event and Action Plan in Appendix
6.1 shall be carried out.
Table 4.9 Action and Limit Level for
Water Quality Monitoring
|
Monitoring
Station |
Depth |
DO (mg/L)
+ |
Turbidity
(NTU) ~ |
SS (mg/L)
~ |
|||
|
Action
Level |
Limit
Level |
Action
Level |
Limit
Level |
Action
Level |
Limit
Level |
||
|
W1 |
Surface, Middle
& Bottom |
6.5 |
5.3 |
7.7 NTU or 120% of
upstream control station's turbidity at the same tide of the same day,
whichever is higher |
12.4 NTU or 130% of
upstream control station's turbidity at the same tide of the same day,
whichever is higher |
8.9 mg/L or 120% of upstream control station's SS
at the same tide of the same day, whichever is higher |
11.3 mg/L or 130% of upstream control station's SS at
the same tide of the same day, whichever is higher |
|
W2 |
|||||||
|
W4 |
|||||||
|
W5 |
Surface, Middle
& Bottom |
5.9 |
5.5 |
9.8 NTU or 120% of
upstream control station's turbidity at the same tide of the same day,
whichever is higher |
10.5 NTU or 130% of
upstream control station's turbidity at the same tide of the same day,
whichever is higher |
12.6 mg/L or 120% of
upstream control station's SS at the same tide of the same day, whichever is
higher |
15.0 mg/L or 130% of upstream control station's SS at
the same tide of the same day, whichever is higher |
|
W6 |
|||||||
|
W7 |
|||||||
|
W8 |
Surface &
Middle |
||||||
|
Bottom |
5.9 |
5.5 |
|||||
Remarks +: For DO, non-compliance occurs when monitoring results is
lower than the limits.
Remarks ~: For SS and Turbidity, non-compliance occurs when monitoring
results is larger than the limits
5.0.1
The
environmental monitoring will be implemented based on the division of works
areas of each designed projects. Overall layout showing work areas and
monitoring stations is shown in Figure 2.1
and Figure 4.1 – 4.3 respectively.
5.0.2
The
environment monitoring schedules for reporting month and coming month are
presented in Appendix
5.1.
5.1.1 Noise monitoring results measured
in this reporting period are reviewed and summarized. Details of noise
monitoring results and graphical presentation can be referred in Appendix 5.2.
5.1.2 No action or limit level exceedance was
recorded in this reporting month.
5.2.1 Air quality monitoring results measured
in this reporting period are reviewed and summarized. Details of air monitoring results and
graphical presentation can be referred in Appendix 5.3.
5.2.2 No action or limit level exceedance was
recorded in this reporting month.
5.3.1
Due to no
marine-based construction works in the reporting period, no water quality
monitoring was conducted. Water quality monitoring results to
be measured in
the upcoming reporting period will be reviewed and summarized.
Details of water quality monitoring results and graphical presentation will
be referred in Appendix 5.4.
5.4.1
The
quantities of waste for disposal in the Reporting Period are summarized in Table 5.1 and Table 5.2. The Monthly Summary
Waste Flow Table is shown in Appendix
5.5. Whenever possible,
materials were reused on-site as far as practicable.
Table 5.1 Summary of Quantities of Inert C&D Materials
|
Waste Type |
Quantity (this month) |
Quantity (Project commencement to the end of last month) |
Cumulative
Quantity-to-Date |
|
Hard
Rock and Large Broken Concrete (Inert) (in
‘000m3) |
0 |
0.007 |
0.007 |
|
Reused
in this Contract (Inert) (in
‘000m3) |
0 |
0 |
0 |
|
Reused
in other Projects (Inert) (in
‘000m3) |
0 |
0 |
0 |
|
Disposal
as Public Fill (Inert) (in
‘000m3) |
0 |
0 |
0 |
Table 5.2 Summary of Quantities
of C&D Wastes
|
Waste
Type |
Quantity (this month) |
Quantity (Project
commencement to the end of last month) |
Cumulative
Quantity-to-Date |
|
Metals
(in ‘000kg) |
0 |
0 |
0 |
|
Paper
/ Cardboard Packing (in
‘000kg) |
0 |
0 |
0 |
|
Plastics
(in
‘000kg) |
0 |
0.03 |
0.03 |
|
Chemical
Wastes (in
‘000kg) |
0 |
0 |
0 |
|
General
Refuses (in
‘000m3) |
0 |
0.014 |
0.014 |
6.1.1
The
Event Action Plan for construction noise, air quality and water quality are
presented in Appendix 6.1.
6.1.2
The
summary of exceedance is presented in Appendix 6.2.
6.2.1 No action or limit level exceedance was
recorded in this reporting period.
6.3.1
No action
or limit level exceedance was recorded in this reporting period.
6.4.1
Due to no
marine-based construction works in the reporting period, no water quality
monitoring was conducted.
6.5.1
No
environmental non-compliance was recorded in the reporting month.
6.6.1
There was
no particular action taken since no non-compliance was recorded in the
reporting period.
7.0.1.
Within
this reporting month, weekly environmental site audits were conducted on 5, 12, 19 and 27 August 2021. IEC attended the joint site
inspection on 27 August 2021.
Table 7.1 Summary of
Environmental Inspections
|
Item |
Date |
Reminder(s)/ Observation(s) |
Action taken by Contractor |
Outcome |
|
20210805_1 |
05 Aug 2021 |
The
Contractor is reminded to well maintain the water tank to prevent any discharge
flowing outside the site area. |
As
observed on 12 Aug, water tanks are well maintained and covered to avoid
potential discharge. |
Completion
as observed on 12 Aug 2021 |
|
20210827_ |
27 Aug 2021 |
The Contractor
should replace the NRMM label attached on the excavator in the northern side
of works area for better identification. |
The
excavator with damaged NRMM label was removed from the northern side of works
area. |
Completion
as observed on 2 Sep 2021 |
7.0.3. Within this reporting month,
monthly landscape site audits were conducted on 21
August 2021.
7.0.4. No non-compliance was found during
the landscape
site inspection. Results and findings of these inspections in this
reporting month are listed below in Table 7.2.
Table 7.2 Summary of Landscape
site inspections
|
Item |
Date |
Reminder(s)/ Observation(s) |
Action taken by Contractor |
Outcome |
|
- |
- |
- |
- |
- |
8.0.1.
No environmental complaint, notification
of summons and successful prosecution regarding construction works was recorded
in the reporting period.
8.0.2.
The
details of cumulative complaint log and updated summary of complaints are
presented in Appendix 8.1.
8.0.3.
Cumulative
statistic on complaints and successful prosecutions are summarized in Table
8.1 and Table 8.2 respectively.
Table 8.1 Cumulative Statistics on
Complaints
|
Reporting Period |
No. of Complaints
|
|
August
2021 |
0 |
|
Project
commencement to the end of last reporting month |
- |
|
Total |
0 |
Table 8.2 Cumulative Statistics on
Successful Prosecutions
|
Environmental
Parameters |
Cumulative No.
Brought Forward |
No. of Successful
Prosecutions this month (Offence Date) |
Cumulative No. Project-to-Date |
|
Air |
- |
0 |
0 |
|
Noise |
- |
0 |
0 |
|
Water |
- |
0 |
0 |
|
Waste |
- |
0 |
0 |
|
Total |
- |
0 |
0 |
9.0.1.
The
EM&A programme was carried out in accordance with the EM&A Manual
requirements, minor alterations to the programme proposed were made in response
to changing circumstances.
9.0.2.
Mitigation
measures according to the environmental mitigation implementation schedule and
the EIA were generally implemented by the Contractor. Hence, the EM&A programme
was considered effective and shall be maintained.
9.0.3.
The
scheduled construction activities and the recommended mitigation measures for
the coming 3 months are listed in Table 9.1. The construction
programmes of the Project are provided in Appendix 9.1.
Table 9.1 Construction Activities and Recommended
Mitigation Measures in Coming Reporting 3 Months
|
Key Construction Works |
Recommended Mitigation Measures |
|
·
Tree
felling ·
Cofferdam
construction ·
Construction
plants mobilization |
·
Dust
control during dust generating works; ·
Implementation
of proper noise pollution control; ·
Provision
of protection to ensure no runoff out of site area or direct discharge into
Wang Tong River; and ·
Proper
waste handling and storage; |