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 and Next 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
– July
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 1st
EM&A report presenting the environmental monitoring
findings and information recorded during the period of 12 July 2021 to 31 July 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 in the reporting period.
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 15, 22 and 29 July 2021. IEC attended the joint site inspection on 22 July 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 23 July 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 |
|
|
·
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 |
Engineer |
Mr. Lai Fu Keung |
3903 6792 |
3188 3418 |
|
Engineer’s
Representative |
Engineer |
Mr. Yeung Sui Chung |
3903 6813 |
||
|
Unison
Construction Engineering Limited |
Contractor
|
Site
Agent |
Mr. David Chiu |
2690 2232 |
2363 3199 |
|
Environmental
Officer |
Mr. Chiu Tse |
||||
|
Independent Environmental
Checker (IEC) |
Independent Environmental Checker (IEC) |
Mr. James Choi |
|||
|
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.
·
No major site
activity was in-progress.
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. |
|||
|
Environmental Permit |
EP-555/2018/A |
16 Dec 2020 |
N/A |
Valid |
|
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 First Submission |
Date
of Latest Submission^ or Approval# |
|
|
Condition 1.12 |
Notification of Commencement Date of
Works |
3 June 2021 |
3 June 2021 ^ |
|
Condition 2.7 |
Submission of Management Organization
of Main Construction Companies, the ET and the IEC |
22 December 2020 |
20 May 2021 ^ |
|
Condition 2.8 |
Submission of Construction Works
Schedule and Location Plan |
3 June 2021 |
22 June 2021 # |
|
Condition 2.9 |
Submission of Breeding Bird Survey
Report |
15 December 2020 |
29 December 2020 # |
|
Condition 3.3 |
Submission of Baseline Monitoring
Report |
29 January 2021 |
24 June 2021 # |
|
Condition 4.2 |
Setting up Dedicated Internet Website |
28 April 2021 |
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
Position System
4.3.7.
The GPS device shall be calibrated at checkpoint (e.g.
Quarry Bay Survey Nail at Easting 840683.49 and Northing 816709.55) before
taking samples and in-situ measurements. This would ensure that monitoring
works are conducted in monitoring locations.
Water Depth Detector
4.3.8.
A portable, battery-operated echo sounder shall be used for the
determination of water depth at each designated monitoring station.
Dissolved Oxygen And Temperature Measuring Equipment
4.3.9.
The instrument should be a portable, weatherproof dissolved oxygen 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
temperature of 0-45 degree Celsius
4.3.10.
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
4.3.11.
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.
pH
4.3.12.
The instrument shall consist of a potentiometer, a glass electrode, a
reference electrode and a temperature-compensating device. It shall be readable
to 0.1 pH in a range of pH 0 to 14. Standard buffer solutions of at least pH 7
and pH 10 shall be used for calibrating the instrument before and after use.
Sampler
4.3.13. 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.
Salinity
4.3.14.
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.
Sample Container and
Storage
4.3.15.
After sampling, samples shall be transferred and stored in high density
polythene bottles with no preservatives added, stored in 4°C without being
frozen, and delivered to the laboratory for analysis as soon as possible. Each
sample should have sufficient volume for robust analysis.
Monitoring Methodology
4.3.16.
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.
4.3.17.
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.
4.3.18.
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 |
4.3.19.
Due to no marine-based construction works in the reporting period, 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
4.3.20.
Analysis of suspended solids will be carried out in a HOKLAS accredited
laboratory, which is ALS Technichem (HK) Pty Ltd.
EVENT and action plan
4.3.21.
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 15, 22
and 29 July 2021.
IEC attended the joint site inspection on 22 July 2021.
Table 7.1 Summary of
Environmental Inspections
|
Item |
Date |
Reminder(s)/ Observation(s) |
Action taken by Contractor |
Outcome |
|
20210715_1 |
15 Jul 2021 |
The
Contractor should remove general refuse in southern side of works area for
better housekeeping. |
As
observed on 22 Jul, general refuse in the southern side of works area had
been removed. |
Closed |
7.0.3.
Within this reporting month, monthly landscape site audits were
conducted on 23 July 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 |
|
July
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; |