CONTRACT NO: SD 6/2020
Construction of San Shek Wan Sewage Treatment Works
Associated Submarine Outfall and Pui O Sewerage Works Under Environmental Permit no. EP-538/2017
Monthly Environmental Monitoring & Audit Report
February 2022
revision 2
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CLIENTS: |
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Drainage Services 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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Melody Cheng Environmental
Team Leader |
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DATE: |
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14 March 2022 |
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1.1.......... Scope of the Report
1.2.......... Structure of the Report
2.1.......... Construction Programme
2.2.......... Works undertaken during
the month
3.2.......... Environmental
Mitigation Measures
3.3.......... Environmental
monitoring requirements and contractual requirements
3.4.......... Site Inspection and
Audit Reports
4.1.......... Noise Monitoring
4.2.......... Water Quality
Monitoring
4.4.......... Waste Management
5. Complaints,
Notification of Summons and Prosecution
7.1.......... Noise Monitoring.
7.2.......... Water Quality Monitoring
7.3.......... Ecological Impact
Monitoring
7.4.......... Review of the Reasons
for and the Implications of Non-compliance
7.5.......... Summary of action taken
in the event of and follow-up on non-compliance
lIST OF TABLES
Table 3.1 Summary
of submission status under EP-538/2017
Table 3.3
Summary of Environmental Inspections
Table 4.1 Noise
Monitoring Equipment
Table 4.2 Noise
Monitoring Station
Table 4.3 Water
Quality Monitoring Equipment
Table 4.4 Marine
Water Quality Stations for Water Quality Monitoring
Table 4.5 Summary
of Quantities of Waste Material (as of December 2021)
Table 5.1 Cumulative
Statistics on Complaints
Table 5.2 Cumulative
Statistics on Successful Prosecutions
Table 6.1 Construction
Activities and Recommended Mitigation Measures in Coming Reporting 3 Months
lIST OF FIGUREs
Figure 2.2 Contract Layout Plan
Figure
2.3 Locations of Noise Monitoring
Station
Figure
2.4 Locations of Water Quality
Monitoring Stations
Figure
2.5 Mark up Figure 5.4i
extracted from approved EIA Report (AEIAR-210/2017)
Figure
2.6 Location Plan for
Temporary Holding Nursery
lIST OF APPENDIces
Appendix 4.1 Copies of Calibration
Certificates
Appendix
4.2 Impact Monitoring
Schedule
Appendix 4.3 Noise Monitoring Results and
Graphical Presentations
Appendix
4.4 Monthly Summary
Waste Flow Table
Appendix 6.1 3 Months Rolling Programme – Mar 2022 to May 2022
EXECUTIVE SUMMARY
i.
This
is the Environmental Monitoring and Audit (EM&A) Monthly Report
– February
2022 of Outlying
Islands Sewerage Stage 2 – South Lantau Sewerage Works under Environmental
Permit no. EP-538/2017 (Hereafter as “the Project”). The construction works of the
Project was commenced on 3 November 2021
and the tentative completion date is Q1 2026. The
EM&A report presenting the environmental monitoring findings and
information recorded during the period of 01 February 2022 to 28 February 2022. 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:
·
Tree pruning, removal, digging Recipient site preparation and
transplanting works at San Shek Wan Sewage Treatment Works (SSWSTW) and Pui O
Sewage Pumping Station (POSPS)
·
Excavation and site formation works at SSWSTW
·
Village sewers (excavation, sewer laying, construction of manhole) at
Pui O Lo Uk Tsuen
Exceedances of Action/Limit Levels
Noise Monitoring
iii.
Noise monitoring was conducted at five (5)
noise monitoring stations N12a, N12b, N13, N14 and N17 once per week in the
reporting month.
iv.
No action or limit level exceedance was recorded in construction noise
level in this reporting period.
Water Quality Monitoring
v.
No water quality monitoring
was conducted at six (6) monitoring stations three
days per week in the reporting month due to no
marine-based construction works.
Ecological Impact Monitoring
vi.
Transplanting of the trees of Aquilaris sinensis was completed on 28 February 2022.
Complaint log
vii.
No environmental complaint regarding the construction works
was recorded in the reporting period.
Notifications
of Any Summons and Successful Prosecutions
viii.
No environmental notification of any summons and
successful prosecution regarding the construction works was recorded in the reporting
period.
Reporting
Changes
ix.
Deployment of silt curtain will be subject to actual commencement of
marine works.
Future
Key Issues
x.
In
coming reporting 3 months, the scheduled construction activities and the
recommended mitigation measures are listed as follows:
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Recommended Mitigation Measures |
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·
Tree pruning, digging recipient site preparation and transplanting
works ·
Establishment works for transplanted trees. ·
Village sewers (excavation, sewer laying, construction of manhole) at
Pui O Lo Uk Tsuen ·
Trunk Sewers and Rising Mains preparation works outside village and to
POSPS ·
Site formation for POSPS and horizontal directional drilling (HDD)
works setup at SSWSTW ·
Excavation and Lateral Support (ELS) works at SSWSTW and POSPS. |
·
Ensure the transplanting of the trees including Aquilaris sinensis
and their establishment are not affected by any unacceptable construction
works; ·
Implementation of proper noise pollution control; ·
Dust control during dust generating works; ·
Adopt surface
drainage and sediment control facilities for sewage installation in village
and public roads; ·
Vehicle wheel-washing and body washing facilities are provided at the site
entrance; ·
Regular water spraying on exposed area; and ·
Proper waste handling, recycling 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-538/2017 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 Outlying Islands Sewerage Stage 2 - South Lantau
Sewerage Works (Register No.: AEIAR-210/2017).
1.1.2.
In accordance with Clause 3.4 stated in EP-538/2017, 4 hard copies and 1
electronic copy of Monthly EM&A Report shall be submitted to the Director
within 2 weeks after the end of each reporting month.
1.1.3.
According to Section 12.2 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 Environmental
Status – construction programme, works
undertaken during the month with illustrations, drawing showing the project
area, environmental sensitive receivers and monitoring locations.
Section 3 Implementation
Status – Advice on the implementation
status of environmental protection and pollution control/mitigation measures,
as recommended in the EIA Report and summarised in the updated implementation
schedule.
Section 4 Monitoring
Results – summarizes the monitoring
results obtained in the reporting period, including monitoring methodology,
name of laboratory and equipment used and calibration details, parameters
monitored, monitoring locations (and depth), monitoring date, frequency, and
duration.
Section 5 Report
on Complaints,
Notification of Summons and Successful Prosecutions
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 notifications
of summons and successful prosecutions for breaches of the current
environmental protection/pollution control legislations, including locations
and nature of the breaches, investigation, follow-up actions taken, results 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 non-compliance.
Section 6 Others – An account of the future key issues as reviewed from
the works programme and work method statements.
Section 7 Conclusion
2.1.1
The proposed sewerage works will collect the sewage generated from
the unsewered areas of Shui Hau, Tong Fuk,
Cheung Sha, San Shek Wan, Pui O and Ham Tin in South
Lantau (i.e. within the Project Catchment Area) and convey it to a proposed
sewage treatment works at San Shek Wan for treatment and disposal
into outer bay of Pui O/ Chi Ma Wan via a submarine outfall.
2.1.2
The entire Project are divided into three contracts. Contract No.
DC/2020/20 (the Contract) would have the following implementations as
demonstrated in Figure 2.1.
2.1.3
The major components of the Project under Environmental Permit (EP) (EP
No. EP-538/2017) comprises: (i) construction of sewage treatment works at San
Shek Wan (SSWSTW) and associated submarine outfall; (ii) construction of sewage
pumping station at Pui O (POSPS); (iii) village sewage works at Pui O; and (iv)
trunk sewers and rising mains on carriageways.
2.1.4
No construction programme with fine
tuning of construction activities showing the inter-relationship with
environmental protection/ mitigation measures for the month.
2.2.1
In the reporting month, the principal work activities conducted are as
follow:
·
Site formation works at SSWSTW
·
Village sewers (excavation, sewer laying, construction of manhole) at
Pui O Lo Uk Tsuen
·
Tree
pruning, removal, digging Recipient site preparation and transplanting works at
SSWSTW and POSPS
The
locations of works are shown in Figure 2.2.
3.1.1 Mitigation measures according to
the environmental mitigation implementation schedule in Annex A of EM&A
Manual were generally implemented by the Contractor. Hence, the EM&A
programme was considered effective and shall be maintained.
3.1.2
Ecological mitigation measures – transplantation of Aquilaris
sinensis was completed on 28 February 2022. Advices are the following:
a)
Provide caring measures for the health, form and structural conditions,
etc. for the concerned tree Aquilaris sinensis
(tree no. 392) during establishment period;
b)
Planning for transplant the tree back to permanent location, considering
the expected height & breadth inclement of the tree.
3.1.3 Landscape & Visual mitigation
measures – Total of 4 trees no. T742, T751, T758 including Aquilaris sinensis tree no. T392 were transplanted
on 21st and 28th February 2022. Advices are the
following:
a)
Strengthened tree protection works, such as support and guying;
b)
Planning for transplant the trees back to permanent location,
considering the expected height & breadth inclement of the trees.
c)
Planning for compensatory tree planting arrangement.
3.2.1
Environmental mitigation measures mentioned the EIA Report were weekly
reviewed and recorded in Weekly Environmental Site Audit Checklist. Also, a
summary of the current status on submissions and measures mentioned in
Environmental Permit (EP-538/2017) are shown in Table 3.1.
Table 3.1 Summary of
submission status under EP-538/2017
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EP Condition |
Submission |
Date of Latest Submission to EPD^ / EPD Approval# |
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Condition 2.10 |
Waste Management Plan (Rev. 5) |
19 Nov 2021^ |
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Condition 2.11 |
Submission of Preservation and/or Transplantation Plan for Plant
Species of Conservation Importance (Rev. 7) |
25 June 2021^ |
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Condition 2.12 |
Submission of Compensatory Woodland Planting Plan (Rev. 5) |
2 July 2021^ |
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Condition 2.13 |
Silt Curtain Deployment Plan (Rev. 6) |
31 Jan 2022^ |
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Condition 2.14 |
Landscape Mitigation Plan |
To be confirmed |
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Condition 2.15 |
Construction Noise Mitigation Plan (Rev. 13) |
8 Feb 2022^ |
3.3.1
A summary of the current status on licences and/or permits on
environmental protection pertinent to the Project is shown in Table 3.2.
Table 3.2 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. |
Issued Date |
Valid Period & Expiry Date (dd-mm-yyyy to dd-mm-yyyy) |
Status |
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Notification
of Works Under APCO |
466408 |
14 Apr
2021 |
N/A |
Valid |
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Discharge
Licence |
POPS:
WT00039820-2021 SSWSTW:
WT00039636-2021 |
31 Dec
2021 30 Dec
2021 |
31-12-2021
to 31-12-2026 30-12-2021
to 31-12-2026 |
Valid |
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Billing
account under Waste Disposal Ordinance |
Account
No.: 7040411 |
05 May
2021 |
N/A |
Valid |
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Registration
as a Chemical Waste Producer |
0000-931-K3428-01 |
13 May
2021 |
N/A |
Valid |
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Construction
Noise Permit |
GW-RS0921-21 |
26 Nov
2021 |
29-11-2021
to 28-05-2022 |
Valid |
Note: Only
include those valid or under application; fill in “N/A” for non-applicable
item(s).
3.4.1
Within this reporting month, weekly environmental site inspections were
conducted on 08, 15, and
24 February 2022.
IEC attended the SSEMC meeting held on 24 February 2022.
3.4.2
No non-compliance was found during
the site inspection while reminders on environmental measures were recommended.
Results and findings of these inspections in this
reporting month are listed below in Table 3.3.
Table 3.3 Summary of
Environmental Inspections
|
Inspection Date |
Reminder and Recommendations |
Close-out Date / Status |
|
8 Feb 2022 |
Comment from IEC (10 Feb 2022): the barrier seems to be quite
tight to the tree root and not sure if that has allowed sufficient tree
protection zone (TPZ) as mentioned in DEVB TC (W) No. 7/2015. https://www.devb.gov.hk/filemanager/technicalcirculars/en/upload/340/1/C-2015-07-01.pdf Suggest double check in next site
visit. |
15 Feb
2022 |
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15 Feb 2022 |
Pui O
Sewage Pumping Station – Transplant trees should be properly fenced off along dripline and
fully implement tree preservation so as to ensure that the Tree
Protection Zone (above and below the ground) should not be encroached
by the construction works. |
24 Feb
2022 |
|
24 Feb 2022 |
Reminder for site works should not
encroach on the Tree Protection Zone. |
28 Feb
2022 |
4.1.1
Monitoring Procedure
(a)
The impact noise monitoring should be
carried out at all the designated monitoring stations when there are
project-related construction activities undertaken within a radius of 300m from
the monitoring stations.
(b)
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.
(c)
Façade measurements were made at the
monitoring locations. For free-field measurement, a correction factor of +3 dB
(A) would be applied.
(d)
The battery condition was checked to
ensure the correct functioning of the meter.
(e)
Parameters such as frequency weighting,
the time weighting and the measurement time were set as follows:
(f)
Frequency weighting: A, Time weighting:
Fast, Measurement time set: continuous 5 mins
(g)
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.
name of laboratory and
equipment used and calibration details
4.1.2
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
4.1.
Table 4.1 Noise
Monitoring Equipment
|
Honglim HLES-02 |
2016611465 |
4.1.3 The calibration certificates of the noise monitoring
equipment are attached in Appendix
4.1.
4.1.4
Calibration Details
(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.
Parameters monitored
4.1.5
The construction noise level shall be measured in terms of the
A-weighted equivalent continuous sound pressure level (Leq). Leq
(30min) should be used as the monitoring parameter. Supplementary
information for data auditing, statistical results such as L10 and L90
shall also be obtained for reference.
4.1.6
For impact monitoring for construction of village sewers / rising main,
noise monitoring should be undertaken on weekly basis. One set of Leq (30min)
noise level as six consecutive Leq (5min) between 07:00-19:00 hours
on normal weekdays.
Monitoring Stations
4.1.7
The noise monitoring stations for the Project are listed and shown in Table
4.2, impact noise monitoring was
conducted at five (5) noise monitoring stations N12a, N12b, N13, N14 and N17
once per week in the reporting month.
Table 4.2 Noise Monitoring Station
|
Monitoring
Station ID (1) |
Monitoring
Location |
Measurement
Type |
Level (in terms
of no.
of floor) |
|
N01a |
Shui Hau Village |
Free-Field |
G/F |
|
N01c |
Shui Hau Village |
Free-Field |
G/F |
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N03a |
Tong Fuk Village |
Free-Field |
G/F |
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N05a |
Residences at Cheung Fu Street |
Free-Field |
G/F |
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N07 |
Government Holiday Bungalows |
Free-Field |
G/F |
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N08 |
Cheung Sha Ha Tsuen |
Free-Field |
G/F |
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N10 |
Cheung Sha Sheung Tsuen |
Façade |
G/F |
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N11b |
San Shek Wan – Ming Garden |
Free-Field |
G/F |
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N12a |
Lo Uk Tsuen |
Free-Field |
G/F |
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N12b |
Lo Uk Tsuen |
Façade |
G/F |
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N13 |
Pui O San Wai Tsuen |
Façade |
G/F |
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N14 |
South Lantau Community Centre |
Free-Field |
G/F |
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N15b |
Pui O Lo Wai Tsuen |
Façade |
G/F |
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N16a |
Residences at Ham Tin |
Free-Field |
G/F |
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N16b |
Residences at Ham Tin |
Free-Field |
G/F |
|
N17 |
Bui O Public School |
Façade |
R/F |
Remarks (1): Fine
adjustment of noise monitoring stations at all locations was proposed as per EP
Condition 3.1.
Monitoring date, time,
Frequency and Duration
4.1.8
For daytime construction work on normal weekdays, monitoring of Leq(30min)
should be carried out at each station at 0700-1900 hours on normal weekdays at
a frequency of once a week. Impact monitoring schedule can be referred to Appendix
4.2.
Noise Monitoring Results
4.1.9
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 4.3.
4.1.10
No action or limit level exceedance was recorded in
construction noise level in this reporting period.
Monitoring Methodology
4.2.1
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.
Name of laboratory and
equipment used and calibration details
Laboratory Measurement /
Analysis
4.2.2
Analysis of suspended solids will be carried out in a HOKLAS accredited
laboratory, which is ALS Technichem (HK) Pty Ltd.
equipment used
Dissolved Oxygen, pH And Temperature Measuring
Equipment
4.2.3
Multifunctional Meter and Turbid Meter are used at each designated
monitoring station. They are capable of measuring:
(a)
a dissolved oxygen level in the range
of 0-20mg/L and 0-200% saturation (Detection Limit: 0.1mg/L)
(b)
a temperature of 0-45 degree Celsius (Detection Limit: 0.1 degree Celsius)
(c)
turbidity level between 0-1000NTU (Detection
Limit: 0.1NTU)
(d)
salinity in the range of 0-40ppt (Detection
Limit: 0.1ppt)
(e)
pH value in range of 0.0 – 14.0
(Detection Limit: 0.1units)
Other monitoring equipment namely water depth meter, water current
meter, dGPS positioning device, water sampler listed below were also deployed,
(a)
Water depth meter (Range: 0.6 -100m, Resolution: 0.1m)
(b)
Water current meter (Range: 0-360o, Detection
Limit: 1mm/s)
(c)
dGPS positioning device (Resolution: Horizontal: 0.25m; Vertical:
0.50 m )
(d)
Water sampler (Horizontal discrete type, Capacity: 2.2L)
Sampler Container and Storage
4.2.4
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
4.2.5
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.
calibration details
4.2.6
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.
4.2.7
Brand and model of the equipment are given in Table 4.3.
Table 4.3 Water Quality
Monitoring Equipment
|
Equipment |
Brand and
model |
Series
Number |
|
Multifunctional Meter |
Sonde YSI Professional Plus |
17F100236 |
|
Turbid meter |
Xin Rui WGZ-3B |
1807079 |
4.2.8
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 4.1 will be
prepared in the upcoming reporting month during commencement of monitoring.
Parameters monitored
4.2.9
In construction phase, the levels of dissolved oxygen (DO), temperature,
turbidity and salinity should be measured in situ while suspended solids (SS)
is determined by laboratory analysis.
MONITORING STATIONS
4.2.10
Water quality monitoring involves 6 monitoring stations. Reviewing the location of the
outfall constructed under the scope of Contract DC/2020/02, water quality
impact of the localized dredging works during construction phase can be
effectively monitored around the nearfield stations SR4, SR5, SR15 within 500m
radius of the outfall location and SR6 is already outside the 500m radius
together with CE and CF can effectively act as control stations to monitor the
extent of the dredging impact, whereas the farfield SR9, SR10 and SR12 are
located at least 3km away from the sewage outfall location. As such, water quality
monitoring at Station SR9, SR10 and SR12 were cancelled. The locations of water quality
monitoring station are shown in Table 4.4.
Table 4.4 Marine Water Quality
Stations for Water Quality Monitoring
|
Station |
Description |
Easting |
Northing |
|
CE |
Upstream
control station at ebb tide |
810900 |
807690 |
|
CF |
Upstream
control station at flood tide |
815720 |
807980 |
|
SR4 (1) |
Ecological
Sensitive Receiver (Coral Communities) at Pui O Wan |
814938 |
810975 |
|
SR5 |
Ecological Sensitive
Receiver (Coral Communities) at Pui O Wan |
814326 |
810540 |
|
SR6 |
Gazetted Bathing Beach at Lower Cheung Sha |
810553 |
810475 |
|
SR15 |
Gazetted Bathing Beach at Pui O and Ecologically Important Stream at Pui O |
816037 |
810722 |
Remarks (1): Fine adjustment of water
quality monitoring stations at SR4, SR9 and SR12 was proposed as per EP
Condition 3.1, and baseline monitoring was conducted at corresponding fine
adjusted locations.
Monitoring date, time,
Frequency and Duration
4.2.11
The levels of dissolved oxygen (DO), temperature, turbidity and salinity
were measured in situ while suspended solids (SS) is determined by laboratory
analysis at all the monitoring stations in Table 4.4 three times a week.
4.2.12
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.
4.2.13
Impact Monitoring shall be carried out three 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.
4.2.14
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.
4.2.15
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.
Monitoring Results
4.2.16
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.
MONITORING METHODOLOGY
4.3.1
The weekly site audit to be carried out by the ET should include
checking whether good site practices are being properly implemented by the
Contractor.
4.3.2
Impact monitoring of the transplanting of the
tree of Aquilaris sinensis at San SSWSTW, establishment and
after-establishment caring measures of the compensatory mixed woodland to
ensure the affected tree would not be affected by any unacceptable construction
works. The trees would be treated with establishment works immediately after
transplanting.
PARAMETERS
MONITORED
4.3.3
The extent of the work site boundaries should be checked by the ET
during the weekly site audit. Any
disturbance by the Contractor outside the works area especially any damage to
the vegetation and surrounding habitats outside the Project area shall be
reported to ER and IEC.
4.3.4
To identify any unacceptable construction works for the trees of Aquilaris
sinensis during transplanting, establishment and after-establishment caring
measures of the compensatory mixed woodland.
MONITORING
LOCATION
4.3.5
The original location of Aquilaris sinensis is at San SSWSTW (Figure
2.5). The tree is transplanted to temporary holding nursery (Figure 2.6) for establishment.
MONITORING
DATE, TIME, FREQUENCY AND DURATION
4.3.6
The recommended good site practices to be audited once every week as
part of the site audit programme. The weekly site audit to be carried out by
the ET includes checking whether good site practices are being properly
implemented by the Contractor. Results are recorded in Weekly Environmental
Site Audit Checklist.
4.3.7
Monitoring programme for post-transplantation will be conducted once per
month.
MONITORING
RESULTS
4.3.8
Results and findings of site audit in this reporting month are listed in
Table 3.3.
4.3.9
Transplanting work was completed on 28 February 2022.
4.4.1 The quantities of waste for disposal in the
Reporting Period are summarized in Table 4.5. The Monthly Summary Waste Flow
Table is shown in Appendix
4.4.
4.4.2
There is 2400kg of felled tree has been recycled in reporting month.
Table 4.5 Summary of
Quantities of Waste Material (as of February 2022)
|
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 |
0 |
|
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) |
2.36898 |
0.86687 |
3.23585 |
|
Metals (in ‘000kg) |
0 |
0.00720 |
0.00720 |
|
Paper / Cardboard Packing (in ‘000kg) |
0 |
0.02448 |
0.02448 |
|
Plastics (in ‘000kg) |
0 |
0.00696 |
0.00696 |
|
Chemical Wastes (in ‘000kg) |
0 |
0 |
0 |
|
General Refuses (in ‘000kg) |
52.60 |
178.95 |
231.55 |
*:
Further
breakdown into sub-group if considered applicable;
*: Please also
provide daily dumping report for our records.
*: Delete as
appropriate
5.1.1
No environmental
complaint, notification of summons and successful prosecution regarding
construction works was recorded in the reporting period.
5.1.2
Cumulative statistic on complaints and successful prosecutions are
summarized in Table 5.1 and Table 5.2 respectively.
Table 5.1 Cumulative
Statistics on Complaints
|
Reporting
Period |
No.
of Complaints |
|
February
2022 |
0 |
|
Project
commencement to the end of last reporting month |
- |
|
Total |
0 |
Table 5.2 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 |
|
Other |
- |
0 |
0 |
|
Total |
- |
0 |
0 |
6.1.1
In coming reporting 3 months, the scheduled construction activities are
listed as follows:
·
Tree pruning, digging recipient site preparation and transplanting works
·
Establishment works for transplanted trees
·
Village sewers (excavation, sewer laying, construction of manhole) at
Pui O Lo Uk Tsuen
·
Trunk Sewers and Rising Mains Outside village and to POSPS
·
Site formation for POSPS and horizontal directional drilling (HDD) works
setup at SSWSTW
·
Excavation and Lateral Support (ELS) works at SSWSTW and POSPS.
6.1.2
The scheduled construction activities and the recommended mitigation
measures for the coming 3 months are listed in Table 6.1. The
major construction activities for the next 3 months are summarized in Three
Months Rolling Programme - Dec 2021 to Feb 2022 in Appendix 6.1.
Table 6.1 Construction Activities and Recommended Mitigation Measures in Coming Reporting 3
Months
|
Key Construction Works |
Recommended Mitigation Measures |
|
·
Tree pruning, digging recipient site preparation and transplanting
works ·
Establishment works for transplanted trees. ·
Village sewers (excavation, sewer laying, construction of manhole) at
Pui O Lo Uk Tsuen ·
Trunk Sewers and Rising Mains preparation works outside village and to
POSPS ·
Site formation for POSPS and horizontal directional drilling (HDD)
works setup at SSWSTW ·
Excavation and Lateral Support (ELS) works at SSWSTW and POSPS. |
·
Ensure the transplanting of the trees including Aquilaris sinensis
and their establishment are not affected by any unacceptable construction
works; ·
Implementation of proper noise pollution control; ·
Dust control during dust generating works; ·
Adopt surface drainage
and sediment control facilities for sewage installation in village and public
roads; ·
Vehicle wheel-washing and body washing facilities are provided at the
site entrance; ·
Regular water spraying on exposed area; and ·
Proper waste handling, recycling and storage. |
7.1.1
No action or limit level exceedance was recorded in construction noise
level in this reporting period.
7.2.1
Due to no marine-based construction works in the reporting period, no water
quality monitoring was conducted.
7.3.1
Transplanting of one individual of Aquilaris sinensis at San
SSWSTW was completed on 28 February 2022.
7.4.1
No environmental non-compliance was recorded in the reporting month.
7.5.1
There was no particular action taken since no non-compliance was
recorded in the reporting period.
Figure 2.1
Master Layout Plan
Figure 2.2
Contract Layout Plan
Figure 2.3
Locations of Noise Monitoring Station
Figure 2.4
Locations of Water Quality Monitoring Stations
Figure 2.5
Mark up Figure 5.4i extracted from approved EIA
Report (AEIAR-210/2017)
Figure 2.6
Location Plan for Temporary Holding Nursery
Appendix 4.1
Copies of Calibration Certificates
Appendix 4.2
Impact Monitoring Schedule
Appendix 4.3
Noise Monitoring Results and Graphical Presentations
Appendix 4.4
Monthly Summary Waste Flow Table
Appendix 6.1
Three Months Rolling Programme – March 2022 to May
2022