Document reference: |
370161 | 05|01 | A |
Information class: |
Standard |
This document is issued for the party which
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Contents
1.3 Environmental Status
in the reporting period
1.4 Summary of EM&A
Requirements
2 Impact
Monitoring Methodology
3.1 Impact Monitoring
Schedule
3.2 Results of Impact
Monitoring
4.2 Monitoring of
Herpetofauna
4.3 Monitoring of
Dragonflies and Butterflies
4.5 Monitoring of Water
Quality
5.2 Construction Phase
Audit Summary
6 Environmental
Site Inspection and Audit
6.2 Solid and Liquid
Waste Management Status
6.3 Status of
Environmental Licences and Permits
6.4 Recommended
Mitigation Measures
7 Report on
Non-compliance, Complaints, Notifications of Summons and Successful
Prosecutions
7.1 Record of
non-compliance of Action and Limit Levels
7.2 Record on
Environmental Complaints Received
7.3 Record on
Notifications of Summons and Successful Prosecution
7.4 Review of Reasons
for and Implications of Non-compliance, Complaints, Summons and Prosecutions
7.6 Cumulative
Statistics for Complaints, Notifications of Summons and Successful Prosecutions
8.1 Site Preparatory
Works and Construction Works for the Coming Month
8.2 Key Issues for the
Coming Months
8.3 Monitoring Schedule
for the Coming Month
8.4 Conclusions and
Recommendations
B.
Tentative Construction Programme (not
used)
C.
Action and Limit Levels for Construction Phase
D.
Event and Action Plan for Air Quality, Noise, Water Quality and
Landscape & Visual
F.
Graphical Plots of the Monitoring Results
G.
Weather Conditions during the Monitoring Period
H.
Ecological Monitoring Conducted
I.
Summary of Bird Surveys conducted
J.
Summary of Herpetofauna, Mammal and Insect Surveys Conducted
K.
Summary of Water Quality Monitoring associated with Ecological
Monitoring conducted
L.
Environmental Mitigation Measures - Implementation Status
M.
Landscape and Visual Audit Photos
Tables
Table 1.1: Summary of Impact EM&A
Requirements
Table 1.2: Environmental Monitoring
and Audit Schedule for the Reporting Month
Table 2.1: Air Quality Monitoring
Parameters, Frequency and Duration
Table 2.2: Air Monitoring Stations
Table 2.3: TSP Monitoring Equipment
Table 2.4: Noise Monitoring
Parameters, Frequency and Duration
Table 2.5: Noise Monitoring Stations
Table 2.6: Noise Monitoring Equipment
Table 2.7: Water Quality Monitoring
Parameters, Frequency and Duration
Table 2.8: Water Quality Monitoring
Stations
Table 2.9: Water Quality Monitoring
Equipment
Table 2.10: Analytical Methods applied
to Water Quality Samples
Table 2.11: Detection Limits for Water
Quality Determinants
Table 2.13: Construction and Operation
Phase Audit Checklist
Table 2.14: Proposed Construction
Phase Mitigation Measures
Table 2.15: Proposed Operation Phase
Mitigation Measures
Table 3.1: Summary of 1-hour TSP
Monitoring Results
Table 3.2: Summary of 24-hour TSP
Monitoring Results
Table 3.3: Summary of Construction
Noise Monitoring Results
Table 3.4: Summary of Water Quality
Monitoring Results
Table 4.1: Summary of Ecological
Monitoring in WRA and Survey Area under EM&A Manual
Table 5.1: Construction and Operation
Phase Audit Summary
Table 6.1: Summary of Site Inspections
and Recommendations
Table 6.2: Status of Environmental
Submissions, Licences and Permits
Table 7.1: Summary of Exceedances in
Water Quality
Table 7.2: Statistics for Complaints,
Notifications of Summons and Successful Prosecution
Table 8.1: Tentative Environmental
Monitoring and Audit Schedule for the Next Reporting Month
Figures
Figure
1.1 General Layout Plan of the
Project Site
Figure
2.1 Locations of Air Quality
Monitoring Stations
Figure
2.2 Locations of Noise Monitoring
Stations
Figure
2.3 Locations of Water Quality
Monitoring Stations
Figure
4.1 Survey Area and Transect Walked
Figure
4.2 Water Quality Monitoring
Locations for Ecological Monitoring
Mott MacDonald Hong Kong Ltd.
(“MMHK”) has been commissioned to undertake the Environmental Team (ET)
services to carry out environmental monitoring and audit (EM&A) for both
pre-construction and construction phases of the Proposed Comprehensive
Development at Wo Shang Wai, Yuen Long.
This is the 162nd
EM&A report submitted under the Condition 4.5 of Environmental Permit No.
EP-311/2008/E. This report summarises the findings on EM&A during the
period from 1 to 31 October 2023.
Exceedance of Action and Limit
Levels
There was no breach of Action or
Limit levels for Air Quality (1-hr TSP and 24-hr TSP) and Noise level (as Leq) in the reporting month.
During October 2023, a total of 19 Action Level and 14 Limit Level
exceedances for water quality were observed. Seven Action Level exceedances of
pH, one Limit Level exceedance of pH, and nine Limit Level exceedances of DO
were recorded at MP3; one Action Level exceedance of pH, one Action Level
exceedance of SS and four Limit Level exceedances of SS were recorded at MP4;
three Action Level exceedances of pH were recorded at MP5; seven Action Level
exceedances of pH were recorded at MP6.
Implementation of Mitigation
Measures
Site audits were carried out on
4, 11, 17 and 27 October 2023 to confirm the implementation measures undertaken
by the Contractor in the reporting month. The outcomes of the site audits are
presented in Section 6 and the status of implementation of mitigation measures
in the site is shown in Appendix
L.
Record of Complaints
There was no record of complaints
received in the reporting month.
Future Key Issues
Site works scheduled to be
commissioned in the coming three months include regular maintenance work for
the Wetland Restoration Area including adjusting the water level, if required,
and removal of unwanted species in the pond. No major heavy construction works
will be carried out. Potential environmental impacts due to the activities,
including air quality, noise, water quality, ecology
and landscape and visual, will be monitored.
Environmental mitigation measures
will be implemented on site as recommended and weekly site audits will be
carried out to ensure that the environmental conditions are acceptable.
In March 2005, the Project
Proponent, Profit Point Enterprises Limited, acquired the development site at
Wo Shang Wai in Yuen Long. An Environmental Impact Assessment (EIA) was then
carried out and approved under the EIA Ordinance (EIAO), and the Environmental
Permit (EP-311/2008) for construction of the comprehensive development in Wo
Shang Wai was first granted by EPD on 9 September 2008 and has been
subsequently varied, with the current version (EP-311/2008/E) issued by EPD on
19 December 2017.
The Project involves the
residential development and associated infrastructure and wetland restoration
area and linear landscape area. The construction works under the Environmental
Permit commenced on 12 May 2010. The site formation construction works of the
Wetland Restoration Area (hereafter WRA) were completed on 15 November 2010 and
the WRA was established by October 2012, within 30 months from the commencement
of construction as stipulated in the EP. This indicated that planting works as
scheduled in the approved Wetland Restoration and Creation Scheme (WRCS; Nov
2009) were complete, except along the western and southern boundary where the
planting is affected by the existing site boundary and noise barrier, and for
which a Variation to Environmental Permit (EP-311/2008/C) to defer planting at
the location was approved. Consequently, EP (EP-311/2008/D) including specific
mitigation measures to minimise certain identified noise impacts during the
operation phase was approved. The current valid EP (EP-311/2008/E) comprises
varied conditions for the implementation and maintenance of visual and
landscape measures, and for the implementation of noise mitigation
measures.
Mott MacDonald Hong Kong Ltd.
(“MMHK”) has been commissioned to undertake the Environmental Team (ET)
services to carry out environmental monitoring and audit (EM&A) for both
pre-construction and construction phases of the Proposed Comprehensive
Development at Wo Shang Wai, Yuen Long.
According to the EP Condition
4.5, the monthly EM&A Report shall be submitted to the Director within two
weeks after the end of the reporting month. This report summarises the findings
during the period from 1 to 31 October 2023.
The organisation chart and lines
of communication with respect to the on-site environmental management structure
together with the contact information of the key personnel are shown in Appendix
A.
During the reporting month, Project works undertaken
include:
● General site maintenance work
● Regular maintenance work for the
Wetland Restoration Area (including monitoring the water level and removal of
unwanted species in the pond), as indicated in Section 4.6.
There were no heavy construction
works carried out. The general layout plan of the Project site is shown in Figure
1.1.
The EM&A programme requires
environmental monitoring of air quality, noise, water quality, ecology and landscape and visual as specified in the
approved EM&A Manual.
A summary of impact EM&A requirements is presented in Table 1.1 below:
Table 1.1: Summary of Impact EM&A Requirements
Parameters |
Descriptions |
Locations |
Frequencies |
Air Quality |
24-Hour TSP |
ASR1, ASR2A, ASR3, ASR4 |
Once every 6 days |
1-Hour TSP |
ASR1, ASR2A, ASR3, ASR4 |
3 times every 6 days |
|
Noise |
Leq(30min),
L90, L10 (dB(A)) |
NSR1, NSR3, NSR5, NSR7 |
Weekly |
Water Quality |
Dissolved Oxygen (DO), temperature, pH, suspended
solids (SS) and Biochemical Oxygen Demand (BOD) |
MP1 to MP6 |
3 days per week |
Ecology |
Birds |
Within the Project Area and Assessment Area of 500m |
Weekly |
Dragonflies and Butterflies |
Within the Project Area and Assessment Area of 500m |
Once per month during Mar and Sep to Nov, and twice
per month during Apr to Aug |
|
Herpetofauna |
Within the Project Area and Assessment Area of 500m |
Daytime: Once per month during Apr to Nov Night-time: Once per month during Mar to Aug |
|
Water quality of Wetland Restoration Area (WRA) |
WRA |
After filling of WRA with water, monthly for in situ
water quality and every six months (end of wet season and end of dry season)
for laboratory testing |
|
Site Inspections |
Within the Project Area and Assessment Area of 500m |
Weekly |
|
Landscape and Visual |
Auditing of protection of existing trees, the transplanting
of existing trees, the creation of new wetland, the planting of new trees and
shrubs and other landscape and visual mitigation measures |
CM1 to CM10 and OM1 to OM7 within the Project Area |
Site inspections once every two weeks during construction
phase; once every two months during operational phase |
The Environmental Quality Performance Limits for air
quality, noise and water quality are shown in Appendix
C.
The Event and Action Plan for air
quality, noise, water quality and Landscape & Visual are shown in Appendix
D.
The monitoring schedule for the
reporting month is shown in Table 1.2 as
follows.
Table 1.2: Environmental
Monitoring and Audit Schedule for the Reporting Month
For air quality, construction
noise and water quality, ecology, landscape and visual
monitoring methodology, including the monitoring locations, monitoring
equipment used, monitoring parameters, and frequency and duration, etc., are
detailed in this Chapter.
In accordance with the EM&A
Manual, 1-hour and 24-hour TSP levels monitoring are to be conducted during the
construction phase. Table 2.1 summarizes the
monitoring parameters, frequency and duration of air
quality monitoring.
Table 2.1: Air Quality Monitoring Parameters, Frequency
and Duration
Monitoring Stations |
Parameter |
Frequency and Duration |
ASR1, ASR2A, ASR3 & ASR4 |
24-hour TSP |
At least once in every six-days |
1-hour TSP |
3 times every six-days |
The four air quality monitoring
stations were established in the EM&A manual and were slightly adjusted
during the baseline monitoring phase. Locations of the agreed air quality
monitoring stations are listed in Table 2.2 and
as shown in Figure
2.1.
Table 2.2: Air Monitoring Stations
Monitoring Stations |
Locations |
ASR1 |
Guard house outside House No. 1, Ventura Avenue, Royal
Palms* |
ASR2A |
At the rooftop of refuse collection point, which is
located at the southwest of the project area |
ASR3 |
At the commercial centre at Palm Springs, which is
located at the south of the project area |
ASR4 |
Outside works site entrance* |
*Note: Relocation of ASR1 and
ASR4 were from 5 June 2018 as the previous locations were within the Project
construction site. All monitoring data at ASR1 and ASR4 from June 2018 is
measured at the new monitoring locations.
Continuous 24-hour TSP air
quality monitoring is conducted using High Volume Sampler (HVS) (Model:
GMWS-2310 Accu-vol). The HVS meets all the
requirements of the EM&A Manual. Portable direct reading dust meters were
used to carry out the 1-hour TSP monitoring. Table 2.3 summarizes the equipment used in
the impact air quality monitoring.
Table 2.3: TSP Monitoring Equipment
Equipment |
Model |
24-hr TSP monitoring |
|
High Volume Sampler |
GMWS 2310 Accu-vol |
Calibrator |
TE-5025A |
1-hr TSP monitoring |
|
Portable direct reading dust meter |
Sibata LD-3B
Laser Dust Monitor |
Installation
The HVS was installed in the
vicinity of the air sensitive receiver. The following criteria were
considered in the installation of the HVS.
● A horizontal platform with appropriate
support to secure the sampler against gusty wind was provided.
● The distance between the HVS and any
obstacles, such as buildings, was at least twice the height that the obstacle
protrudes above the HVS.
● A minimum of two metres separation
from walls, parapets and penthouse was required for rooftop sampler.
● A minimum of two metres separation
from any supporting structure, measured horizontally was required.
● No furnace or incinerator flues or
building vent were nearby.
● Airflow around the sampler was
unrestricted.
● The sampler has been more than 20
metres from any drip line.
● Permission was obtained to set up the
samplers and to obtain access to the monitoring stations.
● A secured supply of electricity is
needed to operate the samplers.
Preparation of Filter Papers
● Glass fibre filters were labelled and
sufficient filters that were clean and without pinholes were selected.
● All filters were equilibrated in the
conditioning environment for 24 hours before weighing. The conditioning
environment temperature was around 25 °C and not variable by more than ±3 °C
with relative humidity (RH) < 50% and was not variable by more than
±5%. A convenient working RH was 40%.
Field Monitoring
● The power supply was checked to ensure
the HVS works properly.
● The filter holder and the area
surrounding the filter were cleaned.
● 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.
● The filter was properly aligned on the
screen so that the gasket formed an airtight seal on the outer edges of the
filter.
● 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.
● The shelter lid was closed and was
secured with the aluminium strip.
● The HVS was warmed-up for about 5
minutes to establish run-temperature conditions.
● A new flow rate record sheet was set
into the flow recorder.
● The flow rate of the HVS was checked
and adjusted at around 1.1 m3/min. The range specified in the
EM&A Manual was between 0.6-1.7 m3/min.
● 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.
● The initial elapsed time was recorded.
● 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.
● It was then placed in a clean plastic
envelope and sealed.
● All monitoring information was
recorded on a standard data sheet.
● Filters were sent to a HOKLAS
accredited laboratory for analysis.
Maintenance and Calibration
● The HVS and its accessories are
maintained in good working condition, such as replacing motor brushes routinely
and checking electrical wiring to ensure a continuous power supply.
● HVSs were calibrated at two-month
intervals.
● Calibration records for HVSs are shown
in Appendix
E.
Field Monitoring
The measuring procedures of the
1-hour dust meter are in accordance with the Manufacturer’s Instruction Manual
as follows:
● Set POWER to “ON”, push BATTERY
button, make sure that the meter’s indicator is in the range with a red line
and allow the instrument to stand for about 3 minutes (Then, the air sampling
inlet has been capped).
● Push the knob at MEASURE position.
● Push “O-ADJ” button. (Then meter’s
indication is 0).
● Push the knob at SENSI ADJ position
and set the meter’s indication to S value described on the Test Report using
the trimmer for SENSI ADJ.
● Pull out the knob and return it to
MEASURE position.
● Push “START” button.
Maintenance and Calibration
● The 1-hour dust meter would be checked
at 3-month intervals and calibrated at 1-year intervals throughout all stages
of the air quality monitoring.
Following the requirements in the
EM&A Manual for noise, noise monitoring has to be
carried out during the construction phase. Continuous noise monitoring for the
A-weighted levels Leq(30 min), L10 and L90
is undertaken once per every week.
Table 2.4
summarizes the monitoring parameters, frequency and
duration of air quality monitoring.
Table 2.4: Noise Monitoring Parameters, Frequency and
Duration
Monitoring Stations |
Parameter |
Frequency and Duration |
NSR1, NSR3, NSR5, NSR7 |
Leq(30min),
L90, L10 (dB(A)) |
Once every week |
The four noise quality monitoring
stations were established in the EM&A manual and were slightly adjusted
during the baseline monitoring phase. Locations of the agreed noise quality
monitoring stations are listed in Table
2.5 and as shown in Figure
2.2.
Table 2.5: Noise Monitoring Stations
Monitoring Stations |
Locations |
Type of measurement |
NSR1 |
Noise monitoring equipment was set up near the
boundary wall at Palm Springs |
Free field |
NSR3 |
The monitoring station was
located next to the guard house at Palm Spring |
Façade |
NSR5 |
Outside House No. 1, Ventura
Avenue, Royal Palms* |
Façade |
NSR7 |
The monitoring station was
located near the boundary wall of the house of Mai Po San Tsuen |
Free field |
*Note: Relocation of NSR5 was
from 5 June 2018 as the previous location was within the Project construction
site. All monitoring data at NSR5 from June 2018 is measured at the new
monitoring location.
Integrating
Sound Level Meter was used for noise monitoring. It is a Type 1 sound level
meter capable of giving a continuous readout of the noise level readings
including equivalent continuous sound pressure level (Leq)
and percentile sound pressure level (Lx). They comply with
International Electrotechnical Commission Publications 651:1979 (Type 1) and
804:1985 (Type 1). Table 2.6 summarizes the
noise monitoring equipment model being used.
Table 2.6: Noise Monitoring Equipment
Equipment |
Model |
Integrating Sound Level Meter |
Rion NL-52 |
Calibrator |
Larson Davis CAL200 |
Field Monitoring
● The Sound Level Meter was set on a
tripod at a height of at least 1.2 m above the ground.
● Façade and free-field measurements
were made at the monitoring locations.
● The battery condition was checked to
ensure the correct functioning of the meter.
● Parameters such as frequency
weighting, the time weighting and the measurement time were set as follows:
– frequency weighting: A
– time weighting: Fast
– time measurement: 30 minutes intervals
(between 07:00 and 19:00)
● Prior to and after each noise
measurement, the meter was calibrated using a Calibrator for 94 dB at 1
kHz. If the difference in the calibration level before and after
measurement was more than 1 dB, the measurement would be considered invalid has
to be repeated after re-calibration or repair of the equipment.
● During the monitoring period, the Leq, L10 and L90 were
recorded. In addition, any site observations and noise sources were
recorded on a standard record sheet.
Maintenance and Calibration
● The microphone head of the sound level
meter and calibrator is cleaned with soft cloth at quarterly intervals.
● The meter and calibrator are sent to
the supplier or HOKLAS laboratory to check and calibrate at yearly intervals.
● Calibration records are shown in Appendix
E.
In accordance with the
requirements in the EM&A Manual for water quality, water quality parameters
including Dissolved Oxygen (DO), temperature, pH, turbidity, suspended solids
(SS) and Biochemical Oxygen Demand (BOD) have to be
monitored at designated monitoring stations during construction of the Project.
DO, temperature and pH were measured in-situ whereas SS and BOD were analysed
in a laboratory. The measurements should be taken at all designated monitoring
stations, three days per week. The interval between any two sets of monitoring
was not less than 36 hours. Table 2.7
summarizes the monitoring parameters, frequency and
duration of water quality monitoring.
Table 2.7: Water Quality Monitoring Parameters, Frequency
and Duration
Monitoring Stations |
Parameter |
Frequency and Duration |
MP1, MP2, MP3, MP4, MP5 & MP6 |
DO, temperature, pH, SS, turbidity, BOD |
Three days every week |
The six water quality monitoring
stations were established in the EM&A manual. Locations of the agreed water
quality monitoring stations are listed in Table 2.8
and as shown in Figure
2.3.
Table 2.8: Water Quality Monitoring Stations
Monitoring Stations |
Easting |
Northing |
MP1* |
838 730.50 |
822 862.25 |
MP2* |
838 933.26 |
823 247.41 |
MP3 |
839 107.17 |
823 596.84 |
MP4 |
839 286.14 |
823 638.55 |
MP5 |
839 134.35 |
823 722.99 |
MP6 |
839 063.02 |
823 842.25 |
*Note: The water quality impact
monitoring at MP1 and MP2 have been terminated since July 2012 due to
withdrawal of access right from landowner.
The Water Quality Monitoring
Equipment and Analytical Methods applied to Water Quality Samples are given in Table 2.9 and Table 2.10
respectively. Details of which are discussed as follows.
Table 2.9: Water Quality Monitoring Equipment
Equipment |
Model |
Equipment/ Serial Number |
Conductivity, Dissolved oxygen, pH, Salinity and
Temperature Measuring Meter, Turbidity |
YSI ProDSS |
16H104233 21K101468 |
Global Positioning System (GPS) |
Garmin eTrex Vista |
ENO 007 |
Table 2.10: Analytical Methods applied to Water Quality
Samples
Determinant, unit |
Standard Method |
Total Suspended Solids, mg/L |
In house method based on APHA 2540D; ALS Method Code:
EA-025 |
Biochemical Oxygen Demand (BOD), mg/L |
In house method based on APHA 5210B; ALS Method Code:
EP-030 |
All in-situ monitoring
instruments were checked, calibrated and certified by
a laboratory accredited under HOKLAS or any other international accreditation scheme
before use.
Dissolved Oxygen (DO), Temperature, pH and Turbidity
measuring equipment
A portable, weatherproof
multiparameter instrument (YSL ProDSS) was used in
the monitoring. It can be capable for measuring dissolved oxygen (DO),
temperature, pH and turbidity simultaneously with the
following limits:
● a dissolved oxygen level in the range
of 0-50 mg/L and 0-500 % saturation;
● a temperature of -5 to 70 degrees Celsius;
● pH value of 0-14 with 0.1 as the base
unit; and
● turbidity between 0-4000 NTU
Global Positioning System (GPS)
A hand-held GPS navigator (Garmin
eTrex Vista) was used to identify the designated
monitoring stations prior to water sampling.
Suspended Solids and BOD Measurements (Sample Containers
and Storage)
Water samples for SS analysis
were stored in high density polythene bottles with no preservative added,
packed in ice (cooled to 4 ºC without being frozen), delivered to the
laboratory, and analysed as soon as possible after collection. Analysis was
carried out in a HOKLAS accredited laboratory.
The limits of detection for the
in-situ and laboratory measurements are shown in Table
2.11.
Table 2.11: Detection Limits for Water Quality
Determinants
Determinant |
Limit of Detection |
Dissolved Oxygen |
0.1 mg/L |
Temperature |
0.1 degree Celsius |
pH |
0.01 unit |
Turbidity |
0.1 NTU |
Suspended Solids |
2 mg/L |
BOD |
2 mg/L |
In situ Measurement
All pH meters, DO/ temperature
meters had been checked and calibrated prior to use. Standard buffer solution
of at least two pH levels (either pH 4 and pH 7, or pH 7 and pH 10) had been
used for calibration of the instrument before and after use.
DO meters had been calibrated by
a laboratory accredited under HOKLAS or any other international accreditation
scheme, and subsequently re-calibrated at three-monthly intervals throughout
all stages of the water quality monitoring. Responses of sensors and electrodes
had been checked with certified standard solutions before each use. Wet bulb calibrations
for all DO meters had been carried out before measurement at each monitoring
location. For the on-site calibration of field equipment, BS 1427:2009,
"Guide to on-site test methods for the analysis of waters" had been
observed.
Measurements were taken at three
water depths, namely, 1m below water surface, mid-depth and 1m above stream
bed/pond bed, except where the water depth is less that 6m, the mid-depth
station maybe omitted. Should the water depth be less than 3 m, only the
mid-depth station will be monitored.
Replicates in-situ measurements
and samples collected from each independent monitoring event are required for
all parameters to ensure a robust statistically interpretable dataset.
Water Samples Preparation and Analysis
For collection of water sampling
within the water courses, a 500ml clean plastic beaker was used. After
collection, the water samples were stored in high-density polythene bottles.
The sample container was rinsed with a portion of the water sample. The water
sample was then transferred to the container, labelled with a unique sample ID and sealed with a screw cap. The water samples were
stored in a cool box maintained at 4 ºC. The water samples were then delivered
to a local HOKLAS-accredited laboratory (ALS) on the same day for analysis.
The testing methods of testing
parameters as recommended by EIA or required by EPD, with the QA/QC results are
in accordance with the requirement of HOKLAS or international accredited
scheme.
The calibration certificates for
equipment used for in-situ monitoring of water quality are attached in Appendix
E.
Target species and certain other
fauna were monitored within the Project Area and Assessment Area during the
wetland and residential construction phase. This is important to ensure that
any unexpected events or impacts either on- or off-site are quickly identified
so that remedial action can be taken. The groups monitored and frequency
of monitoring are shown in Table 2.12.
Table 2.12: Summary of Construction Phase Ecological
Monitoring for the Wo Shang Wai Wetland Restoration Area (WRA)
Species / Parameter |
Construction Phase Ecological
Monitoring |
Birds |
Weekly (including Assessment Area) |
Dragonflies and Butterflies |
Once per month during March and September to November;
and twice per month during April to August |
Herpetofauna |
Daytime: Once per month during April to November; and Night-time: Once per month during March to August |
Water Quality |
After filling of WRA with water, monthly for in situ
water quality and every six months (end of the wet season and end of the dry
season) for laboratory testing |
Site Inspections |
Weekly |
Ecological monitoring locations
during construction phase are shown in Figure
4.1 and the methodology for ecological monitoring is detailed in Section
4.
All measures undertaken by both
the Contractor and the specialist Landscape Sub-Contractor during the
construction phase and first year of the operational phase shall be audited by
a Registered Landscape Architect, as a member of the ET, on a regular basis to
ensure compliance with the intended aims of the measures. Site
inspections should be undertaken at least once every two weeks throughout the
construction period and once every two months during the operational phase.
The broad scope of audit is
detailed below but should also be undertaken with reference to the more
specific checklist provided in Table 2.13
below. Operational phase auditing will be restricted to the last 12 months of
the establishment works of the landscaping proposals and thus only the items
below concerning this period are relevant to the operational phase.
● The extent of the agreed works area
should be regularly checked during the construction phase. Any trespass by the
Contractor outside the limit of the works, including any damage to existing
trees and woodland shall be noted;
● The progress of the engineering works
should be regularly reviewed on site to identify the earliest practical
opportunities for the landscape works to be undertaken;
● All existing vegetation, streams and
other features within the study area which are not directly affected by the
works are retained and protected;
● The methods of protecting existing
vegetation proposed by the Contractor are acceptable and enforced;
● Preparation, lifting transport and
re-planting operations for any transplanted trees;
● The layout, design and construction of
buildings conforms to requirements specified in the EIA report;
● All landscaping works are carried out
in accordance with the EIA recommendations and with specifications;
● The planting of new trees, shrubs,
groundcover, climbers, grasses and other plans, together with the replanting of
any transplanted trees are carried out properly and within the right season;
● All necessary horticultural operations
and replacement planting are undertaken throughout the Establishment Period to
ensure the healthy establishment and growth of both transplanted trees and all
newly establishment plants.
Table 2.13: Construction and Operation Phase Audit
Checklist
Area of Works |
Items to be Monitored |
Works Area |
Check the extent of the Works to ensure that the Works
Area is not exceeded the site boundaries. |
Protection of all trees and woodland blocks to be
retained |
Identification and demarcation of trees / vegetation
to be retained, erection of physical protection (e.g.
fencing), monitoring against possible incursion, physical damage, fire,
pollution, surface erosion, etc. |
Streams |
Ensure no run-off into existing streams |
Clearance of existing vegetation |
Identification and demarcation of trees / vegetation to
be cleared, checking of extent of works to minimize damage, monitoring of
adjacent areas against possible incursion, physical damage, fire, pollution,
surface erosion, etc. |
Transplanting of trees |
Identification and demarcation of trees / vegetation
to be transplanted, monitoring of extent of pruning / lifting works to
minimize damage, timing of operations implementation of all stages of
preparatory and translocation works, and maintenance of transplanted
vegetation, etc. |
Topsoil stripping |
Ensuring existing topsoil is stripped and stored under
recognized good practice and is hydroseeded and regularly turned to prevent
anaerobic conditions |
New buildings |
Ensure that building finishes accord with mitigation
proposals with regard to colour and albedo. |
Boundaries |
Ensuring hoarding are erected as required |
Noise Barrier |
Ensure noise barrier design accords with the
mitigation proposals with regard to location,
materials and finishes. |
Night-time lighting |
Ensuring night-time lighting is directional, hooded
and shielded away from VSRs |
Plant supply |
Monitoring of operations relating to the supply of
specialist plant material (including the collecting, germination
and growth of plants from seed) to ensure that plants will be available in
time to be used within the construction works. |
Landscape and wetland treatments generally |
Check that wetland, and hard / soft landscape designs
conform to intent of mitigation measures and agreed designs |
Soiling, planting, etc. |
Monitoring of implementation and maintenance of
soiling and planting works against possible incursion, physical damage, fire,
pollution, surface erosion, etc. |
Establishment Works |
Monitoring of implementation of maintenance operation
during Establishment Period |
The monitoring locations should
check against the mitigation measures proposed under the approved Environmental
Impact Assessment, which are summarised as follows in Table
2.14 and Table 2.15:
Table 2.14: Proposed Construction Phase Mitigation
Measures
ID No. |
Landscape and Visual Mitigation
Measures |
CM1 |
The construction area and contractor’s temporary works
areas should be minimised to avoid impacts on adjacent landscape. |
CM2 |
Screening of construction works by hoardings/noise
barriers around Works area in visually unobtrusive colours, to screen Works. |
CM3 |
Reduction of construction period to practical minimum. |
CM4 |
Topsoil, where identified, should be stripped and stored for re-use in the construction of the
soft landscape works, where the soil material meets acceptable criteria and
where practical. The Contract Specification shall include storage and
reuse of topsoil as appropriate. |
CM5 |
Hydroseeding or sheeting of soil stockpiles with
visually unobtrusive material (in earth tone). |
CM6 |
Advance screen planting of noise barriers. |
CM7 |
Control night-time lighting and glare by hooding all
lights. |
CM8 |
Ensure no run-off into streams adjacent to Project
Area. |
CM9 |
Protection of existing trees on boundary of project area
shall be carefully protected during construction. Detailed Tree
Protection Specification shall be provided in the Contract Specification.
Under this specification, the Contractor shall be required to submit, for
approval, a detailed working method statement for the protection of trees
prior to undertaking any works adjacent to all retained trees, including
trees in contractor’s works areas. (Tree protection measures will be
detailed at S16 and Tree Removal Application stage). |
CM10 |
Trees unavoidably affected by the works shall be
transplanted where practical. Trees should be transplanted straight to
their destinations and not held in a nursery. A detailed Tree
Transplanting Specification shall be provided in the Contract Specification,
if applicable. Sufficient time for necessary tree root and crown preparation
periods shall be allowed in the project programme. |
Table 2.15: Proposed Operation Phase Mitigation Measures
ID No. |
Landscape Mitigation Measures |
OM1 |
Compensatory Tree Planting for all felled trees shall
be provided to the satisfaction of relevant Government departments.
Required numbers and locations of compensatory trees shall be determined and
agreed separately with Government during the Tree Felling Application process
under DEVB TC(W) 7/2015. |
OM2 |
A continuous belt of screen planting along southern
perimeter of project area with fast growing tree species. At least 450
trees capable of reaching a height > 10m within 10 years should be
planted. Planting of the belt of trees shall be carried out as advance
works ahead of other site formation and building works. |
OM3 |
Maximise soft landscape and amenity water bodies in
residential areas of the development. Approximately 750 trees (of Heavy
Standard size) should be planted. Where space permits, roadside berms
should be created. Street trees should be of species that reach a mature
height of no less than 15m. |
OM4 |
Maximise freshwater habitat wetland creation
consistent with achieving other parameters. Minimum 4.74 ha to be provided.
Wetlands must have natural edge profiles with >1m wide emergent
zone. No access to the wetland by residents and all wetlands must be
screened from residential development by a continuous tree screen at
interface with residential development or earth mounding such that
disturbance is minimised. Implementation of the wetland shall be carried out
as advance works. |
OM5 |
Use appropriate (visually unobtrusive and non-reflective)
building materials and colours in built structures. |
OM6 |
During detailed design, refine building layout to
create a min. 10m wide gap between buildings north of Wo
Shang Wai pond and also two min. 10m wide gaps in the row of buildings
adjacent to Royal Palms. |
OM7 |
Streetscape elements (e.g.
paving, signage, street furniture, lighting etc.) shall be sensitively
designed in a manner that responds to the local context and minimises
potential negative landscape and visual impacts. Lighting units should
be directional and minimise unnecessary light spill. |
Impact monitoring for air quality
(dust), noise and water quality due to the construction work were undertaken
during the reporting month in compliance with the EM&A manual in the
reporting period. Regular site inspections were carried out on 4, 11, 17 and 27
October 2023 during the reporting month to assess the compliance with
environmental requirements.
Results of 1-hour TSP at the four
monitoring locations are summarised in Table 3.1.
Graphical plots of the monitoring results are shown in Appendix
F. The weather conditions in the reporting period are provided in Appendix
G.
Table 3.1: Summary of 1-hour TSP Monitoring Results
Monitoring Date |
Start Time |
1-hr TSP (mg/m3) |
Range (mg/m3) |
Action Level (mg/m3) |
Limit Level (mg/m3) |
||
1st
Result |
2nd
Result |
3rd
Result |
|||||
ASR1 |
|
|
|
|
|
|
|
03-Oct-23 |
08:37 |
31 |
32 |
34 |
21-52 |
378 |
500 |
06-Oct-23 |
09:17 |
23 |
28 |
37 |
|||
12-Oct-23 |
12:50 |
24 |
24 |
22 |
|||
18-Oct-23 |
08:33 |
52 |
47 |
48 |
|||
24-Oct-23 |
08:23 |
24 |
30 |
21 |
|||
27-Oct-23 |
08:24 |
42 |
27 |
24 |
|||
ASR2A |
|
|
|
|
|
|
|
03-Oct-23 |
13:03 |
38 |
47 |
41 |
17-54 |
357 |
500 |
06-Oct-23 |
13:12 |
29 |
27 |
24 |
|||
12-Oct-23 |
09:06 |
21 |
25 |
32 |
|||
18-Oct-23 |
13:01 |
50 |
51 |
54 |
|||
24-Oct-23 |
12:57 |
25 |
23 |
24 |
|||
27-Oct-23 |
13:26 |
36 |
22 |
17 |
|||
ASR3 |
|
|
|
|
|
|
|
03-Oct-23 |
13:20 |
38 |
39 |
40 |
21-49 |
358 |
500 |
06-Oct-23 |
12:54 |
46 |
48 |
22 |
|||
12-Oct-23 |
09:26 |
29 |
28 |
24 |
|||
18-Oct-23 |
13:18 |
48 |
49 |
42 |
|||
24-Oct-23 |
13:15 |
25 |
26 |
21 |
|||
27-Oct-23 |
13:07 |
26 |
27 |
21 |
|||
ASR4 |
|
|
|
|
|
|
|
03-Oct-23 |
08:57 |
39 |
39 |
40 |
20-49 |
372 |
500 |
06-Oct-23 |
08:58 |
20 |
22 |
32 |
|||
12-Oct-23 |
13:09 |
34 |
37 |
25 |
|||
18-Oct-23 |
08:51 |
49 |
46 |
44 |
|||
24-Oct-23 |
08:44 |
21 |
23 |
26 |
|||
27-Oct-23 |
08:06 |
45 |
30 |
25 |
Results of 24-hour TSP at the four monitoring locations are
summarised in Graphical plots of the monitoring results are shown in Appendix
F. The weather conditions in the reporting period are provided in Appendix
G.
Table 3.2: Summary of 24-hour
TSP Monitoring Results
Monitoring Date |
Monitoring Results
(mg/m3) |
Range (mg/m3) |
Action Level (mg/m3) |
Limit Level (mg/m3) |
ASR1 |
|
|
|
|
03-Oct-23 |
71 |
36-77 |
226 |
260 |
06-Oct-23 |
77 |
|||
12-Oct-23 |
51 |
|||
18-Oct-23 |
36 |
|||
24-Oct-23 |
62 |
|||
27-Oct-23 |
46 |
|||
ASR2A |
|
|
|
|
03-Oct-23 |
63 |
31-69 |
213 |
260 |
06-Oct-23 |
69 |
|||
12-Oct-23 |
45 |
|||
18-Oct-23 |
31 |
|||
24-Oct-23 |
51 |
|||
27-Oct-23 |
37 |
|||
ASR3 |
|
|
|
|
03-Oct-23 |
63 |
33-63 |
205 |
260 |
06-Oct-23 |
48 |
|||
12-Oct-23 |
43 |
|||
18-Oct-23 |
33 |
|||
24-Oct-23 |
48 |
|||
27-Oct-23 |
37 |
|||
ASR4 |
|
|
|
|
03-Oct-23 |
58 |
41-67 |
237 |
260 |
06-Oct-23 |
67 |
|||
12-Oct-23 |
60 |
|||
18-Oct-23 |
41 |
|||
24-Oct-23 |
58 |
|||
27-Oct-23 |
50 |
No exceedance of 1-hour and 24-hour TSP (Action or Limit
Level) was recorded in the reporting period.
The construction noise monitoring results are summarized in Table 3.3. Graphical plots of the monitoring data are
shown in Appendix
F. The weather conditions in the reporting period are provided in Appendix
G.
Table 3.3: Summary of Construction Noise Monitoring
Results
Monitoring Date |
Start Time |
Mean and Range of Noise Levels, dB(A) |
Limit Level for Leq
(dB(A)) |
||
Leq |
L10 |
L90 |
|||
NSR1 |
|
|
|
|
|
03-Oct-23 |
11:29 |
45 |
48 |
40 |
75 |
12-Oct-23 |
15:38 |
46 |
48 |
40 |
|
18-Oct-23 |
11:27 |
50 |
51 |
41 |
|
24-Oct-23 |
11:20 |
49 |
50 |
41 |
|
NSR3 |
|
|
|
|
|
03-Oct-23 |
10:39 |
41 |
43 |
37 |
75 |
12-Oct-23 |
14:51 |
43 |
46 |
41 |
|
18-Oct-23 |
10:36 |
43 |
46 |
40 |
|
24-Oct-23 |
10:28 |
43 |
44 |
39 |
|
NSR5 |
|
|
|
|
|
03-Oct-23 |
09:50 |
46 |
50 |
42 |
75 |
12-Oct-23 |
14:02 |
51 |
53 |
47 |
|
18-Oct-23 |
09:46 |
48 |
51 |
44 |
|
24-Oct-23 |
09:37 |
48 |
51 |
44 |
|
NSR7 |
|
|
|
|
|
03-Oct-23 |
09:02 |
66 |
69 |
63 |
75 |
12-Oct-23 |
13:13 |
67 |
68 |
64 |
|
18-Oct-23 |
08:55 |
67 |
70 |
64 |
|
24-Oct-23 |
08:48 |
67 |
70 |
65 |
No exceedance (Action/Limit Level) of construction noise was
recorded in the reporting period.
The water quality monitoring
results are summarized in Table 3.4.
Graphical plots of the monitoring data are shown in Appendix
F. The weather conditions in the reporting period are provided in Appendix
G.
Table 3.4: Summary of Water Quality Monitoring Results
Monitoring Date |
Temp (ºC) |
pH |
Dissolved Oxygen (DO) (mg/L) |
DO (%) |
Turbidity (NTU) |
BOD (mg/L)(1) |
Suspended Solids (mg/L)(1) |
MP3 |
|
|
|
|
|
|
|
03/10/2023 |
30.9 |
7.6 |
5.5 |
73.5 |
9.5 |
4 |
15 |
05/10/2023 |
30.8 |
7.4 |
5.5 |
73.0 |
7.3 |
4 |
12 |
07/10/2023 |
30.2 |
7.5 |
5.4 |
73.5 |
11.5 |
<2 |
18 |
09/10/2023 |
26.3 |
7.3 |
6.2 |
77.0 |
14.7 |
<2 |
14 |
11/10/2023 |
26.4 |
8.0 |
8.4 |
104.2 |
13.5 |
5 |
10 |
13/10/2023 |
25.9 |
7.5 |
5.8 |
71.6 |
6.6 |
3 |
18 |
16/10/2023 |
26.9 |
7.2 |
4.8 |
59.8 |
11.6 |
5 |
17 |
18/10/2023 |
25.0 |
7.7 |
8.1 |
97.9 |
12.9 |
<2 |
14 |
20/10/2023 |
23.2 |
7.6 |
7.9 |
92.0 |
15.7 |
<2 |
16 |
24/10/2023 |
24.6 |
8.2 |
8.7 |
103.9 |
9.1 |
<2 |
9 |
26/10/2023 |
27.8 |
7.6 |
6.3 |
80.0 |
10.3 |
4 |
13 |
28/10/2023 |
26.3 |
7.7 |
6.0 |
75.0 |
8.2 |
<2 |
9 |
30/10/2023 |
26.9 |
7.6 |
6.1 |
76.4 |
17.9 |
<2 |
14 |
Action Level |
- |
<5.5 or >7.5 |
<6.85 |
- |
>64 |
- |
>65 |
Limit Level |
- |
<4.0 or >8.0 |
<6.65 |
- |
>67 |
- |
>66 |
|
|
|
|
|
|
|
|
MP4 |
|
|
|
|
|
|
|
03/10/2023 |
28.8 |
7.4 |
4.7 |
61.7 |
41.6 |
4 |
55 |
05/10/2023 |
29.3 |
7.5 |
6.4 |
83.9 |
25.3 |
3 |
36 |
07/10/2023 |
29.2 |
7.6 |
6.2 |
80.9 |
34.5 |
4 |
50 |
09/10/2023 |
26.2 |
7.5 |
6.0 |
75.1 |
45.1 |
<2 |
62 |
11/10/2023 |
25.4 |
7.4 |
6.1 |
73.4 |
24.4 |
3 |
21 |
13/10/2023 |
25.4 |
7.3 |
6.1 |
74.3 |
22.2 |
3 |
26 |
16/10/2023 |
26.1 |
7.2 |
6.7 |
81.9 |
47.0 |
3 |
73 |
18/10/2023 |
23.4 |
7.4 |
5.9 |
68.8 |
44.6 |
4 |
52 |
20/10/2023 |
22.2 |
7.4 |
5.7 |
65.0 |
48.1 |
4 |
58 |
24/10/2023 |
24.2 |
7.2 |
4.4 |
53.3 |
27.6 |
3 |
35 |
26/10/2023 |
28.0 |
7.3 |
4.4 |
56.0 |
23.9 |
2 |
29 |
28/10/2023 |
26.8 |
7.3 |
5.3 |
67.8 |
32.9 |
2 |
33 |
30/10/2023 |
26.2 |
7.5 |
5.6 |
69.4 |
29.6 |
5 |
48 |
Action Level |
- |
<5.5 or >7.5 |
<3.91 |
- |
>60 |
- |
>50 |
Limit Level |
- |
<4.0 or >8.0 |
<3.82 |
- |
>64 |
- |
>53 |
|
|
|
|
|
|
|
|
MP5 |
|
|
|
|
|
|
|
03/10/2023 |
29.5 |
7.5 |
4.5 |
59.0 |
35.7 |
5 |
63 |
05/10/2023 |
29.7 |
7.5 |
4.7 |
61.9 |
23.4 |
5 |
37 |
07/10/2023 |
29.5 |
7.5 |
5.0 |
66.7 |
33.4 |
4 |
36 |
09/10/2023 |
26.0 |
7.4 |
6.5 |
79.8 |
39.0 |
<2 |
27 |
11/10/2023 |
26.9 |
7.5 |
7.2 |
84.9 |
22.0 |
3 |
19 |
13/10/2023 |
25.8 |
7.5 |
6.3 |
76.6 |
28.6 |
3 |
34 |
16/10/2023 |
26.5 |
7.4 |
5.5 |
67.9 |
23.9 |
4 |
34 |
18/10/2023 |
23.9 |
7.6 |
7.3 |
86.9 |
30.6 |
3 |
39 |
20/10/2023 |
22.3 |
7.6 |
7.1 |
81.5 |
38.7 |
3 |
47 |
24/10/2023 |
24.3 |
7.5 |
6.4 |
77.2 |
20.9 |
<2 |
28 |
26/10/2023 |
28.1 |
7.4 |
5.1 |
65.3 |
21.4 |
<2 |
23 |
28/10/2023 |
26.9 |
7.3 |
5.8 |
72.9 |
28.7 |
<2 |
35 |
30/10/2023 |
26.1 |
7.6 |
6.2 |
76.1 |
27.3 |
5 |
42 |
Action Level |
- |
<5.5 or >7.5 |
<4.13 |
- |
>81 |
- |
>66 |
Limit Level |
- |
<4.0 or >8.0 |
<3.87 |
- |
>84 |
- |
>69 |
|
|
|
|
|
|
|
|
MP6 |
|
|
|
|
|
|
|
03/10/2023 |
30.9 |
7.6 |
5.1 |
68.2 |
36.7 |
4 |
71 |
05/10/2023 |
29.5 |
7.6 |
6.1 |
80.3 |
23.5 |
4 |
37 |
07/10/2023 |
29.6 |
7.5 |
5.5 |
72.8 |
32.6 |
<2 |
36 |
09/10/2023 |
26.5 |
7.4 |
6.3 |
78.3 |
34.3 |
<2 |
27 |
11/10/2023 |
26.1 |
7.6 |
7.4 |
91.0 |
20.0 |
<2 |
13 |
13/10/2023 |
25.7 |
7.5 |
6.2 |
75.7 |
30.5 |
3 |
31 |
16/10/2023 |
26.6 |
7.4 |
6.2 |
76.5 |
21.8 |
4 |
31 |
18/10/2023 |
24.0 |
7.7 |
7.5 |
89.0 |
29.0 |
2 |
40 |
20/10/2023 |
22.2 |
7.6 |
7.1 |
81.0 |
33.4 |
3 |
45 |
24/10/2023 |
24.4 |
7.6 |
7.0 |
82.7 |
22.9 |
<2 |
29 |
26/10/2023 |
28.1 |
7.4 |
5.5 |
70.0 |
20.3 |
<2 |
21 |
28/10/2023 |
27.0 |
7.4 |
5.5 |
69.4 |
28.0 |
3 |
34 |
30/10/2023 |
26.2 |
7.6 |
6.1 |
75.6 |
24.8 |
5 |
42 |
Action Level |
- |
<5.5 or >7.5 |
<4.61 |
- |
>94 |
- |
>75 |
Limit Level |
- |
<4.0 or >8.0 |
<4.52 |
- |
>96 |
- |
>75 |
Notes:
(1) “<2”:
Value is too low to indicate (<2mg/L).
(2)
For the Limit Level of DO, 1-percentile of baseline data is adopted as
it is greater than 2mg/L. (Refer to Baseline
Monitoring Report)
(3)
Values in Bold indicate Action Level exceedance.
(4)
Values Underlined and in Bold indicate Limit Level
exceedance.
During
October 2023, a total of 19 Action Level and 14 Limit Level exceedances for
water quality were observed. Seven Action Level exceedances of pH, one Limit
Level exceedance of pH, and nine Limit Level exceedances of DO were recorded at
MP3; one Action Level exceedance of pH, one Action Level exceedance of SS and
four Limit Level exceedances of SS were recorded at MP4; three Action Level
exceedances of pH were recorded at MP5; seven Action Level exceedances of pH
were recorded at MP6.
Exceedance of pH and DO at MP3
Exceedance of the Action Level of pH was
observed on 3, 11, 18, 20, 26 , 28 and 30 October
2023. Exceedance of the Limit Level of pH was observed on 24 October 2023.
Exceedances of the Limit Level of DO were observed on 3, 5, 7, 9, 13, 16, 26,
28 and 30 October 2023 at MP3.
As understood, the fish pond near the site
(represented by MP3) is separated from the open ditch by the pond bund (since
commencement of construction phase EM&A monitoring in May 2010) and from
the construction site by the WRA (since it was completed in November 2010). No
direct discharge from the project site to the fish pond
was observed. It is noted as well that there have been no heavy construction
activities in the reporting period.
Mitigation measures for water quality protection, including the provision
of wastewater treatment facilities (with sedimentation tank and AquaSed) and proper drainage system that separates from the
WRA, have been implemented (see Photo 1 & 2). No adverse impact on the fish pond near the site was observed, including on the days
with exceedance of water quality parameters.
According to the results of the baseline water quality monitoring
conducted prior to the commencement of construction works, the pH recorded at
MP3 ranged from 7.7 to 8.6. The recorded pH exceedance (7.6 to 8.2) is
therefore considered to be within the range of the natural variations at this
location.
It is also noted from AFCD's Environmental Management of Pond Fish
Culture (EMPFC) guidelines from its Series of Good Aquaculture Practice that
the pH level of fishpond water should be between 6 and 8.5 and for good water
quality DO levels should be maintained above 4 mg/L. The recorded exceedance
values for pH were well within the guideline recommendations and the recorded
values for DO were above the recommended minimum. Aerators were observed on
most days with DO exceedance so as to mitigate low DO
levels. Nevertheless, the Contractor was reminded to implement the water
quality mitigation measures in accordance with the recommendation stated in
Section 5.6.1 - 5.6.4 of the EIA Report as far as practicable.
It is therefore concluded that the pH and DO exceedances at MP3 were
possibly due to localised natural variations and external factors such as pond
fish culture activities in the fish pond represented
by MP3, which are not related to project activities.
Exceedance
of SS at MP4 and pH at MP4, MP5 and MP6
Exceedances of the Limit Level of SS were observed on 3, 9, 16 and 20
October 2023 and exceedance of the Action Level of SS was observed on 18
October 2023 at MP4. Exceedances of the Action Level of pH were observed on 7
October 2023 at MP4; 18, 20 and 30 October 2023 at MP5; and 3, 5, 11,18, 20, 24
and 30 October 2023 at MP6.
A fair amount of water plant growth and some floating vegetation was
observed at MP4 on the days of SS exceedances (see Photos 16, 18, 19, 20 and
21). It is possible that excessive growth of vegetation and fallen leaves may
have impeded the normal flow of ditch water resulting in localised
accumulations of SS.
According to the results of the baseline water quality monitoring
conducted prior to the commencement of construction works, the pH recorded at
MP4, MP5 and MP6 ranged from 7.7 to 8.6. On the days of pH exceedance at MP4,
MP5 and MP6, the recorded pH exceedances (7.6 to 7.7) are therefore considered
to be within the range of the natural variations at these locations. The open
ditch (represented by MP4, MP5 and MP6) is separated from the fish pond near the site (represented by MP3) by the pond
bund. As presented in the weekly site inspections checklists, no observation
regarding discharge of muddy water was recorded in October 2023. Furthermore,
the site effluent was effectively treated by the AquaSed
system and discharged from the site at a low, controlled rate during the
reporting month. No heavy construction activities were carried out during the
reporting period. Hence, it is possible that these pH level exceedances were
due to natural variations affecting the vicinity in general.
It is believed that the SS exceedances at MP4 as well as pH exceedances
at MP4, MP5 and MP6 were probably due to localised natural variations, water
plant growth and its degradation.
Conclusion
As a result, the
abovementioned exceedances were unlikely to be due to the project works and
therefore not considered to be related to the project.
Photo 1 |
Installation of barrier at the drainage channel to
intercept site runoff and pump the wastewater to the sedimentation tanks prior
to wastewater treatment facilities (AquaSed) (near
discharge outlet to the northern dit
17 October
2023 |
||
Photo 2 |
Wastewater treatment facilities (AquaSed,
sedimentation tanks) inside the site (near discharge outlet to
the northern ditches) |
||
Photo 3 |
17 October
2023 |
||
|
|
||
Photo 4 |
Appearance of the water body at MP3 on 5 October 2023 |
||
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||
Photo 5 |
Appearance of the water body at MP3 on 7 October 2023 |
||
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|
||
Photo 6 |
Appearance of the water body at MP3 on 9 October 2023 |
||
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||
Photo 7 |
Appearance of the water body at MP3 on 11 October 2023 |
||
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||
Photo 8 |
Appearance
of the water body at MP3 on 13 October 2023 |
||
Photo 9 |
Appearance of the water body at MP3 on 16 October 2023 |
||
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|
||
Photo 10 |
Appearance
of the water body at MP3 on 18 October 2023 |
||
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Photo 11 |
Appearance of the water body at MP3 on 20 October 2023 |
||
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Photo 12 |
Appearance
of the water body at MP3 on 24 October 2023 |
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Photo 13 |
Appearance
of the water body at MP3 on 26 October 2023 |
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Photo 14 |
Appearance of the water body at MP3 on 28 October 2023 |
||
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Photo 15 |
Appearance of the water body at MP3 on 30 October 2023 |
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Photo 16 |
Appearance of the water body at MP4 on 3 October 2023 |
||
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Photo 17 |
Appearance
of the water body at MP4 on 7 October 2023 |
||
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||
Photo 18 |
Appearance
of the water body at MP4 on 9 October 2023 |
||
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||
Photo 19 |
Appearance
of the water body at MP4 on 16 October 2023 |
||
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Photo 20 |
Appearance of the water body at MP4 on 18 October 2023 |
||
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Photo 21 |
Appearance of the water body at MP4 on 20 October 2023 |
||
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||
Photo 22 |
Appearance
of the water body at MP5 on 18 October 2023 |
||
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|
||
Photo 23 |
Appearance
of the water body at MP5 on 20 October 2023 |
||
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||
Photo 24 |
Appearance
of the water body at MP5 on 30 October 2023 |
||
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||
Photo 25 |
Appearance
of the water body at MP6 on 3 October 2023 |
||
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||
Photo 26 |
Appearance
of the water body at MP6 on 5 October 2023 |
||
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||
Photo 27 |
Appearance
of the water body at MP6 on 11 October 2023 |
||
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Photo 28 |
Appearance
of the water body at MP6 on 18 October 2023 |
||
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||
Photo 29 |
Appearance
of the water body at MP6 on 20 October 2023 |
||
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||
Photo 30 |
Appearance
of the water body at MP6 on 24 October 2023 |
||
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Photo 31 |
Appearance
of the water body at MP6 on 30 October 2023 |
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|
|
This report documents surveys
conducted in the Survey Area between 1 and 31 October 2023. The Wetland
Restoration Area (WRA) is also surveyed as the area is accessible and site
formation works for WRA has been completed. The updated survey transect is
provided in Figure 4.1.
Dates and ecological surveys conducted during this period are summarised in Appendix
H.
Monitoring was undertaken
following the survey methodology in the EM&A Manual. A transect was
followed in the bird surveys (see Figure 4.1).
All bird species were identified to species and all bird species of
conservation importance and/or wetland dependent were enumerated and recorded
to the habitats in which they were observed. Flying birds were not recorded
unless they were foraging and/or associated with the habitat (such as swifts, swallows and birds of prey). Further, notable bird observations during other surveys or site inspections were
also recorded.
Bird surveys were conducted on a
weekly basis. A total of 43 bird species were recorded in the Survey Area
(excluding the WRA) during regular surveys in the reporting month. Among them
22 were species of conservation importance and/or
wetland-dependence. Within the WRA, 43 bird species were recorded in
the reporting month. Among them 20 were species of conservation importance
and/or wetland-dependence including two of the three target species (Little
Egret and Chinese Pond Heron).
The WRA continues to attract
several species of conservation importance, including the Little Grebe (Tachybaptus
ruficollis), Grey Heron (Ardea cinerea),
Purple Heron (Ardea purpurea), Great
Egret (Ardea alba), Little Egret (Egretta garzetta),
Chinese Pond Heron (Ardeola bacchus), Yellow Bittern (Ixobrychus
sinensis), Black-crowned Night Heron (Nycticorax
nycticorax), Black-winged Kite (Elanus caeruleus), Black Kite (Milvus migrans), Pied Kingfisher (Ceryle
rudis) and White-throated Kingfisher (Halcyon smyrnensis). Little Grebe, Yellow Bittern, Black-crowned
Night Heron, Black-winged Kite, Pied Kingfisher and
White-throated Kingfisher are listed by Fellowes et al. as of “Local Concern”
in 2002. Grey Heron, Great Egret, Little Egret and Chinese Pond Heron are
listed by Fellowes et al. as “Potential Regional Concern” in 2002. Purple Heron
and Black Kite are listed by Fellowes et al. as of “Regional Concern” in 2002.
A summary of survey
data is provided in Appendix
I.
One daytime herpetofauna survey
was scheduled in the reporting month. No amphibian or reptile species were
recorded during the regular daytime survey. Within the WRA, two amphibian and
one reptile species were recorded outside the regular survey.
A summary of the survey findings
is provided in Appendix
J.
One odonates and butterflies survey was scheduled in the
reporting month. Five butterfly species were recorded in the Survey Area
(excluding the WRA) during the regular survey. Within the WRA, 12 odonate species and 14 butterfly species were recorded
during the regular survey. Three additional odonate
species and seven additional butterfly species were recorded in the WRA outside
the regular survey.
Water Snow Flat (Tagiades litigiosa)
and Striped Blue Crow (Euploea Mulciber)
were recorded for the first time in the WRA (and in the whole study).
A summary of the survey findings
is provided In Appendix
J.
Monitoring of mammals was
conducted concurrently with other faunal surveys. Any mammal species
encountered during site inspections or other habitat management works were
recorded as ‘outside survey’.
No mammal species
was recorded in the Survey Area (excluding the WRA) nor within the WRA during
the regular or outside surveys. .
A summary of the survey findings
is provided in Appendix
J.
Regular water level monitoring was conducted on 3 and 17
October 2023. Additional water level monitoring was conducted on 10
October 2023 after the typhoon signal number 9 was hoisted on 8 October 2023.
Sluice gate of Cell 4 was opened to discharge excessive water from the WRA. Additional
water level monitoring was also conducted on 24 October 2023 after discharging
excessive water from the WRA for two weeks.
The water levels in the reporting month ranged between
175cm and 235cm during the water level monitoring works.
The water level of the Cells allowed wetland birds to use
them as foraging sites and attracted diving birds such as Little Grebe (Tachybaptus ruficollis) as well as
kingfishers to forage. The shallower areas along the edges of ponds and islets
attracted ardeids such as Great Egret (Ardea
alba), as well as the target species Little Egret (Egretta
garzetta) and Chinese Pond Heron (Ardeola bacchus).
These areas were also used by other wetland-dependent birds as foraging and/or
perching sites, such as White-breasted Waterhen (Amaurornis
phoenicurus), Black-winged Stilt (Himantopus
Himantopus), Green Sandpiper (Tringa ochropus) and Common Sandpiper (Actitis
hypoleucos). The current water level will be kept
for wetland bird usage.
In-situ water quality monitoring of all other parameters
was conducted on 13 October 2023. Water samples were also collected on 13
October 2023 for laboratory analysis.
Monitoring data is presented in Appendix
K. Locations for the monitoring of water quality for the ecological
monitoring are shown in Figure
4.2.
Broken tree was
found in Cell 3 and Cell 4. The fallen trees did not cause damage to the fence
or other structures.
Broken branches and fallen
leaves were found along the main access road of Cell 1, Cell 2, Cell 3 and Cell 4.
Contingency
works included the removal of broken trees and dangling branches. Fallen
branches and leaves were cleared to the side of the main access road for
natural decomposition.
The fallen
Chinaberry (Melia azedarach) along the main access road of Cell 4 has
not yet been cleared since it posed no immediate danger as it fell in the open
water direction. The main access road (and hence the survey transects and
access for site inspections) was not affected.
Regular
vegetation management activities undertaken at the site in October 2023
primarily involved removal of excessive grass and exotic species along Cell
bunds, the emergency vehicular access (EVA) and open water areas of Cell 1,
Cell 2, Cell 3 and Cell 4.
Fallen leaves
along the EVA of Cell 3 and Cell 4 were swept or blown aside and formed piles
of plant materials on both sides of the EVA. These piles were used to attract
herpetofauna and butterflies.
Climbers
including Paederia foetida
and the exotic Mikania micrantha along the WRA and between cells were
removed by hand to preserve flowering plants, fruiting plants and reedbeds in
the WRA.
The vegetations
along the EVA provided foraging and roosting habitats for breeding birds, as
well as nectar sources for butterflies and rooting sites of dragonflies.
Pruning will be kept to a minimum if the branches do not block the
passage.
Wetland-dependent
Yellow Bittern (Ixobrychus sinensis) and Purple Heron (Ardea purpurea) were regularly recorded in the WRA. Apart from reed (Phragmites
australis), the birds would also use Cattail (Typha sp.) stands. The
reedbeds, cattails and the utilization of these vegetation by
these birds will be closely monitored before any clearance work is
conducted.
Red Imported Fire Ant nests along
the cell bunds and along the EVA were identified. Treatment with AFCD
registered and approved pesticide will be conducted in the coming months after
the rainy season.
Egg masses of Apple
Snails (Pomacea canaliculata)
found along concrete structures of the WRA (e.g., sluice gates between Cells,
concrete structures of all Cells and concrete wall of Cell 4) were cleared by
hand.
Egg masses of the Apple Snails (Pomacea canaliculata)
growing on aquatic vegetation of Cell 1, Cell 2, Cell 3
and Cell 4 were cleared by hand.
Apple Snails were
removed from the Cells during vegetation clearance works.
Mitigation actions have been
taken in the WRA during the survey period to increase the WRA utilization by
wetland dependent species and birds, including:
1. Controlling the vegetation at Cell 1, Cell
2, Cell 3 and Cell 4; and
2. Controlling the water level at Cell 1, Cell
2, Cell 3 and Cell 4.
Ecological monitoring during
October 2023 was carried out according to the survey methodology and frequency
outlined in the EM&A Manual.
A summary of the survey findings
is listed in Table 4.1:
Table 4.1: Summary of Ecological
Monitoring in WRA and Survey Area under EM&A Manual
Species |
Survey
Area (excluding WRA) |
WRA |
Birds |
43 |
43 |
Birds (of conservation importance and/or
wetland-dependence) |
22 |
20 |
Amphibians |
0 |
2 |
Reptiles |
0 |
1 |
Mammals |
0 |
0 |
Odonates |
0 |
15 |
Butterflies |
5 |
21 |
Survey findings indicate that the
ponds within the Survey Area supported numbers and diversity of
wetland-dependent birds typical of fishpond areas. The WRA continues to attract
wetland dependent fauna and serves as a buffer between the residential portion
and the fishponds in the north.
Two of the three target species
Little Egret (Egretta garzetta)
and Chinese Pond Heron (Ardeola bacchus) were observed foraging along the shallow water
areas (including the edge of the cells and non-vegetated islets) or perching on
tall vegetations within the WRA.
Dense and tall vegetation along
the edge of the EVA attracted insectivorous birds, such as Common Tailorbird (Orthotomus sutorius)
and Prinias (Prinia
spp.). The vegetation also acts as night-time roosts for odonates, butterflies and diurnal birds. These vegetation
stands will be kept provided that the branches do not overgrow and obscure the
EVA. During vegetation clearance some of these areas were only treated with
minimum trimming to preserve suitable habitats for wildlife.
Reed-dependent Yellow Bittern (Ixobrychus sinensis) was confirmed to use the
reedbed of the WRA as breeding site and was regularly recorded in the reedbed
of WRA. The reedbed and adjacent vegetations were also frequently used by the
Purple Heron (Ardea purpurea). The
reedbed and adjacent vegetations will be closely monitored before conducting
any clearance work.
Fallen leaves scattered along the
EVA were swept aside and formed a thicker layer of fallen plant materials.
These piled-up plant materials are used to attract amphibians and reptiles
within the WRA.
The EM&A programme for
Landscape and Visual impact due to the construction commenced in June 2010 and
continued during the reporting period. Site inspections on Landscape and Visual
impact were carried out on 4 and 17 October 2023 to confirm the implementation
of mitigation measures at the construction stage.
The Event and Action Plan for
Landscape & Visual is shown in Appendix
D.
The audit was undertaken with
reference to the specific checklists provided in Table
2.13 – Table 2.15 and audit results are
summarized below in Table 5.1. Representative
photos showing the implementation of mitigation measures are presented in Appendix
M.
Table 5.1: Construction and Operation Phase Audit Summary
Area of Works |
Items of be Monitored |
Works Area |
The boundaries of the works area have been established
on site in accordance with the contract documents and approved plans (EP),
and the limit of current heavy construction activity is now confined to within
the site hoardings (North side of the site / access road) and the noise
barriers (other sides of the site). Minor works such as horticultural
maintenance of the planting and transplanted trees, and boundary fence repair
was proceeding along the Royal Palms – Palm Springs boundary. (Appendix
M Photo 1 – Table 2.14 CM2
refers) No construction works were observed to have exceeded
the site boundaries. No construction was carried out at the wetland
restoration area after 15 November 2010. |
Protection of all trees and woodland blocks to be
retained |
Trees retained within the site along the northeast
boundary, beside wetland restoration area, have been identified and protected
by temporary protective fencing. |
Streams |
The works site is partly encircled by a berm /
perimeter channel to intercept surface water and prevent it from washing off
into any of the neighbouring sites. Surface water is collected within
the site in a temporary drainage channel. Gravels beds and barriers
have been installed to filter site runoff,
sedimentation ponds have been provided to enable primary treatment before
discharge to mains drains. |
Clearance of existing vegetation |
Site clearance was completed prior to the commencement
of construction. |
Transplanting of trees |
Tree transplanting has been completed, with the trees
relocated to various points within the planting strip along the southern
boundary of the site, outside the noise barrier. Most of the trees continue
to re-establish well. Trees such as tree no. AA34, 36 & 291 were observed to have poor health
condition. Regular watering and close monitoring of these trees are
recommended. |
Topsoil stripping |
Suitable pond bund and soil material which had been
excavated and stockpiled from the original site, has now been re-used within
the landscape works. Dust suppression measures are active along all
internal site access tracks. |
New buildings |
No new permanent buildings have yet been constructed
on site. |
Boundaries |
Hoardings have been erected along most of the
boundaries of the site. Installation of new screen fence between the
future residential sites and the constructed wetland restoration areas is
complete. Fence has been painted green to match with the surrounding
vegetated environment. (Appendix
M Photo 1 – Table 2.14 CM2
refers) |
Noise Barrier |
Noise barriers have been installed along the southern and
western boundaries of the site in accordance with the contract
requirements. Their design complies with the mitigation requirements,
with upper 6 to 7m portion of the barrier being made from a translucent
material with green tinted (to match with the environment). Supporting GMS
structure, likewise, has been painted green. (Appendix
M Photo 3 – Table 2.14 CM6
refers). |
Night-time lighting |
No night-time works were reported to have been carried
out during the monitoring period. |
Landscape and wetland treatments generally |
Continuous belt of screen planting along the southern and
western boundaries of the site has been completed. The formation,
soiling and water control structures of the wetland restoration area have
been completed. (Appendix
M Photo 3 – Table 2.14 CM6
refers) The wetland areas have been established, with the
ponds are being seasonally filled with rainwater. Planting of areas
around the WRA cells is complete. No construction was carried out at
the wetland restoration area after 15 November 2010. (Appendix
M Photo 2 – Table 2.14 CM2
refers) |
Soiling, etc. |
The soil placement and grading for each of the wetland
restoration areas has been completed. Refilling for those holes left after
the whole tree removal works has been completed. |
Plant supply |
The plant material used in the Advance Planting Strip
and in the WRA are all commonly available species and came from commercial
sources. Transplanted reeds (Phragmites australis) at
the wetland habitat came from the temporary holding nursery onsite. |
Planting |
The
tree species are all from the approved list. Seedling trees and shrubs have been
established at the margins of the wetland cells. Some invasive species and
undesirable exotic species have been found during site inspection; removal of
these species should be undertaken on a regular basis. |
Establishment
Works |
The advance planting, the
compensatory planting and transplanted trees are generally being maintained
by the landscape sub-contractor in accordance with the specification to
ensure that the contract requirements are met. Tree no. 56, 59 and 292 were found
to be severely damaged by Typhoon Saola. Tree no.
56 was observed to be uprooted, leaning, and the trunk was split; tree no. 59
was observed to have a broken and collapsed trunk; Tree no. 292 was observed
with broken and collapsed branches. Removal of the collapsed parts and the
remaining trunk are recommended. Tree no. 71 was observed with split
trunk and collapsed branches. Removal of the collapsed parts and the
remaining trunk is recommended. Presence of termites was observed on
tree no. 45, 53, 65, 91, 156, 180, 194, 217, 227, 236, 242, 309, 340, 348,
358, 363 and 393, application of pesticides is recommended. Growth of fungi was observed on tree
no. 314 and 327. Application of fungicide and close monitoring of the tree
are recommended. Removal of overgrown weeds,
unplanned tree seedlings and invasive climbers in the space behind screen
noise barrier needs to be undertaken on a monthly basis
as they may inhibit the advance planting. Regular removal of invasive species
(i.e., apple snails, Leucaena leucocephala,
Mikania micrantha, Mimosa pudica, Bidens alba, Ludwigia erecta, Sesbania
cannabina, etc.) in WRA should be undertaken. The growth of shrubs /
seedlings on the north side of the WRA remains fair. |
The ET had carried out
construction phase weekly site inspections on 4, 11, 17 and 27 October 2023.
All observations have been recorded in the site inspection checklist and passed
to the Contractor together with the appropriate recommended mitigation measures
where necessary. The key observations from site inspections and associated
recommendations are summarized in Table 6.1.
Table 6.1: Summary of Site Inspections and Recommendations
Key Observations |
ET Recommendation |
Contractor’s Responses / Action(s) Undertaken |
Close-out (Date) |
Nil |
|
|
|
The Contractor has been
registered as a chemical waste producer for the Project. Construction and
demolition (C&D) material sorting was carried out on site. A sufficient number of receptacles were available for
general refuse collection.
As advised by the Contractor, no
inert C&D material (i.e. broken concrete/ big
boulders) were generated on site and sent to a sorting facility for recycling
into rockfill. No metals were generated and collected by registered recycling
collector. No paper/cardboard packing and no plastics were generated on site
and collected by registered recycling collector. No chemical waste was
generated and collected by licensed chemical waste collector. No other types of
wastes (e.g. general refuse) were generated on site
and disposed of at public landfill facility.
The Contractor is advised to
maintain on site waste sorting and recording system and maximize reuse /
recycling of C&D wastes, whenever these are generated.
The environmental permits,
licences, and/or notifications on environmental protection for this Project
which were valid during the reporting period is summarised in Table 6.2.
Table 6.2: Status of Environmental Submissions, Licences
and Permits
Statutory Reference |
Description |
Permit/Reference No. |
Status |
EIAO |
Environmental Permit |
EP-311/2008/E |
Valid |
APCO |
Notification of Construction Work under APCO |
2018-027-A-1 (20 July 2020) |
Valid |
WPCO |
Discharge Licence |
WT00037436-2021 (21 Apr 2021) |
Valid |
WDO |
Registration as Chemical Waste Producer |
WPN0000-542-H3083-04 |
Valid |
WDO |
Bill Account for Disposal |
700945423 |
Valid |
Legend: EIAO – Environmental Impact Assessment Ordinance;
APCO – Air Pollution Control Ordinance; WPCO –Water Pollution Control
Ordinance; WDO – Waste Disposal Ordinance
The EM&A programme followed
the recommended mitigation measures in the EM&A Manual. The EM&A
requirements as well as the summary of implementation status of the
environmental mitigation measures are provided in Appendix
L. In particular, the following mitigation measures continue to be
implemented at the site:
Air Quality
● Access roads should be sprayed with
water or dust suppression chemical to maintain the entire road surface wet or
paved.
Water Quality
● Site effluent should be discharged in
accordance with the discharge licence.
● The site should be confined and
properly maintained to avoid silt runoff.
● Chemicals will always be stored on
drip trays or in bunded areas.
Waste Management
● The chemical waste storage area should
be clearly labelled.
● General refuse should be stored in
enclosed bins or compaction units separate from C&D and chemical wastes.
There was no breach of Action or
Limit Levels for Air Quality and Noise monitoring in the reporting month.
A summary is presented in Table 7.1
below.
Table 7.1: Summary of Exceedances in Water Quality
Monitoring Date |
pH |
Dissolved Oxygen (DO) (mg/L) |
Turbidity (NTU) |
Suspended Solids (mg/L)(1) |
MP3 |
|
|
|
|
03/10/2023 |
7.6 |
5.5 |
9.5 |
15 |
05/10/2023 |
7.4 |
5.5 |
7.3 |
12 |
07/10/2023 |
7.5 |
5.4 |
11.5 |
18 |
09/10/2023 |
7.3 |
6.2 |
14.7 |
14 |
11/10/2023 |
8.0 |
8.4 |
13.5 |
10 |
13/10/2023 |
7.5 |
5.8 |
6.6 |
18 |
16/10/2023 |
7.2 |
4.8 |
11.6 |
17 |
18/10/2023 |
7.7 |
8.1 |
12.9 |
14 |
20/10/2023 |
7.6 |
7.9 |
15.7 |
16 |
24/10/2023 |
8.2 |
8.7 |
9.1 |
9 |
26/10/2023 |
7.6 |
6.3 |
10.3 |
13 |
28/10/2023 |
7.7 |
6.0 |
8.2 |
9 |
30/10/2023 |
7.6 |
6.1 |
17.9 |
14 |
Action Level |
<5.5 or >7.5 |
<6.85 |
>64 |
>65 |
Limit Level |
<4.0 or >8.0 |
<6.65 |
>67 |
>66 |
MP4 |
|
|
|
|
03/10/2023 |
7.4 |
4.7 |
41.6 |
55 |
07/10/2023 |
7.6 |
6.2 |
4 |
50 |
09/10/2023 |
7.5 |
6.0 |
<2 |
62 |
16/10/2023 |
7.2 |
6.7 |
3 |
73 |
18/10/2023 |
7.4 |
5.9 |
4 |
52 |
20/10/2023 |
7.4 |
5.7 |
4 |
58 |
Action Level |
<5.5 or >7.5 |
<3.91 |
>60 |
>50 |
Limit Level |
<4.0 or >8.0 |
<3.82 |
>64 |
>53 |
MP5 |
|
|
|
|
18/10/2023 |
7.6 |
7.3 |
3 |
39 |
20/10/2023 |
7.6 |
7.1 |
3 |
47 |
30/10/2023 |
7.6 |
6.2 |
5 |
42 |
Action Level |
<5.5 or >7.5 |
<4.13 |
>81 |
>66 |
Limit Level |
<4.0 or >8.0 |
<3.87 |
>84 |
>69 |
MP6 |
|
|
|
|
03/10/2023 |
7.6 |
5.1 |
4 |
71 |
05/10/2023 |
7.6 |
6.1 |
4 |
37 |
11/10/2023 |
7.6 |
7.4 |
<2 |
13 |
18/10/2023 |
7.7 |
7.5 |
2 |
40 |
20/10/2023 |
7.6 |
7.1 |
3 |
45 |
24/10/2023 |
7.6 |
7.0 |
<2 |
29 |
30/10/2023 |
7.6 |
6.1 |
5 |
42 |
Action Level |
<5.5 or >7.5 |
<4.61 |
>94 |
>75 |
Limit Level |
<4.0 or >8.0 |
<4.52 |
>96 |
>75 |
Notes:
(1) “<2”: Value is too low to indicate
(<2mg/L).
(2)
For the Limit Level of DO, 1-percentile of baseline data is adopted as it is
greater than 2mg/L. (Refer to Baseline
Monitoring Report)
(3)
Values in Bold indicate Action Level exceedance.
(4)
Values Underlined and in Bold indicate Limit Level exceedance.
No environmental complaint was
received during the reporting month.
No notifications of summons or
successful prosecution were received the reporting month.
Non-compliance
Investigations have been carried
out to identify the causes of the water quality exceedances.
The investigation findings are
presented in Section 3.2.3.1. It was concluded that the above-mentioned
exceedances were unlikely to be due to the construction works and therefore not
considered to be related to the project.
Complaints, Summons and Prosecutions
Not applicable for this reporting
month.
Non-compliance
The Event and Action Plan has
been followed. Although it is considered that the exceedances were not related
to the Project, the Contractor was reminded to implement the water quality
mitigation measures in accordance with the recommendation stated in Section
5.6.1 – 5.6.4 of the EIA Report as far as practicable, regular spot checks
would be conducted on the nearby discharge by the Contractor and he would
inform the ET for investigation.
Complaints, Summons and Prosecutions
Not applicable for this reporting
month.
Cumulative statistics for
complaints, notifications of summons and successful prosecutions for the
Project account for period starting from the date of commencement of
construction (i.e., 12 May 2010) to the end of the reporting month and are
summarized in Table 7.2 below.
Table 7.2: Statistics for Complaints, Notifications of
Summons and Successful Prosecution
Reporting Period |
Cumulative
Statistics |
||
Complaints |
Notifications of Summons |
Successful Prosecutions |
|
This reporting month (October 2023) |
0 |
0 |
0 |
From 12 May 2010 to end of the reporting month
(October 2023) |
8 |
0 |
0 |
Site works to be commissioned in
the coming month include:
● Regular maintenance work for the
Wetland Restoration Area (including adjusting the water level, if required, and
removal of unwanted species in the pond)
● No heavy construction works
Key issues to be considered in
the coming three months include:
● Provision of water spraying or dust
suppression chemical to prevent generation of dust from activities on-site and
the haul road during dry weather conditions;
● Provision of wheel washing facilities
at vehicle exit point;
● Generation and treatment of site
surface runoffs and wastewater from activities on-site and during wet weather conditions;
● Sorting, recycling, storage and
disposal of general refuse and construction waste from activities on-site; and
● Management of chemicals and avoidance
of oil spillage on-site and to the drainage system.
The environmental site inspection
and environmental monitoring will be continued in the coming month.
Impact monitoring for air, noise, water quality, ecology
and landscape and visual in accordance with the approved EM&A Manual has
commenced since 12 May 2010. The tentative monitoring schedule for October 2023
is shown in the Table 8.1.
Table 8.1: Tentative Environmental Monitoring and Audit
Schedule for the Next Reporting Month
The EM&A programme as
recommended in the EM&A manual has been undertaken in the reporting month
since 12 May 2010.
Monitoring of Air Quality, Noise,
Water Quality, Ecology and Landscape and Visual impacts due to the Project was
under way. In particular, the 1-hr TSP, 24-hr TSP, noise level (as Leq) and water quality parameters (such as pH,
DO, turbidity and SS) under monitoring have been checked against established
Action and Limit levels.
There was no breach of Action or
Limit Levels for Air Quality and Noise monitoring in the reporting month.
During October 2023, a total of 19 Action Level and 14 Limit Level exceedances
for water quality were observed. Seven Action Level exceedances of pH, one
Limit Level exceedance of pH, and nine Limit Level exceedances of DO were
recorded at MP3; one Action Level exceedance of pH, one Action Level exceedance
of SS and four Limit Level exceedances of SS were recorded at MP4; three Action
Level exceedances of pH were recorded at MP5; seven Action Level exceedances of
pH were recorded at MP6.
With considerations on the
construction activities and environment, the following recommendations were
provided:
Air Quality
● All stockpiles should be covered by
tarpaulin or kept wet by water spraying;
● All vehicles should be washed to
remove any dusty materials before leaving the construction sites;
● The portion of road leading the
construction site that is within 30m of a designated vehicle entrance or exit
should be kept clear of dusty materials;
● During the dry season, sufficient
water spraying should be provided at haul road to reduce dust emission; and
● Ensure proper functioning of the wheel
wash facility.
Noise
● Mobile plant should be sited as far
away from NSRs as possible;
● Plant known to emit noise strongly in
one direction should be orientated to direct noise away from the NSRs; and
● The construction activities should be
better scheduled to reduce noise nuisance.
Water Quality
● Effluent should be discharged in
accordance with the discharge licence conditions;
● Soil contaminated with chemicals/oils
should be removed from site and the voids should be created filled with
suitable materials; and
● Silt and debris should be removed from
the temporary drainage channel regularly.
Waste Management
● General refuse should be stored in
enclosed bins or compaction units separate from C&D and chemical wastes to
minimise odour, pest and litter impacts.
● Reuse the excavated materials as far
as practical to reduce the amount of waste disposal;
● C&D waste should be segregated and
stored in different containers to other wastes to encourage the re-use or
recycling of materials and their proper disposal;
● Ensure drip trays are provided for
chemical containers to prevent leakage or soil contamination;
● All plants and vehicles should be
properly maintained to prevent oil leakage; and
● Oil stains on soil should be cleared
by disposal of contaminated soil.
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