Contents
Executive Summary
1.1
Background
1.2
Project
Description
1.3
Scope
of the EM&A Report
1.4
Project
Organisation
1.5
Summary
of Construction Works
1.6
Summary
of EM&A Programme Requirements
1.7
Status
of Statutory Environmental Compliance with the Environmental Permit
1.8
Status
of Other Statutory Environmental Requirements
2.1
Air
Quality Monitoring
2.2
Noise
Monitoring
2.3
Surface
Water Quality Monitoring
2.4
Landscape
and Visual Monitoring
2.5
EM&A
Site Inspection
2.6
Waste
Management Status
2.7
Implementation
Status of Environmental Mitigation Measures
2.8
Summary
of Exceedances of the Environmental Quality Performance Limit
2.9
Summary
of Complaints, Notification of Summons and Successful Prosecutions
3.1
Construction
Programme for the Coming Month
3.2
Key
Issues for the Coming Month
3.3
Monitoring
Schedule for the Coming Month
4
Conclusion and Recommendation
Annexes
Annex A
Work Programme
Annex B
Environmental Mitigation Implementation Schedule
Annex C
Monitoring Schedule for This Reporting Period
Annex
D Air Quality
Annex D1
Calibration Certificates for Dust Monitoring Equipment
Annex D2 24-hour TSP
Monitoring Results
Annex D3 Event and
Action Plan for Dust Monitoring
Annex D4 Meteorological
Data
Annex
E Noise
Annex E1
Calibration Certificates for Noise Monitoring Equipment
Annex E2 Noise
Monitoring Results
Annex E3 Event and
Action Plan for Noise Monitoring
Annex
F Surface Water Quality
Annex F1
Calibration Certificates for Surface Water Quality Monitoring Equipment
Annex F2 Surface
Water Quality Monitoring Results
Annex F3 Event and
Action Plan for
Surface Water Quality Monitoring
Annex G
Cumulative Statistics on Exceedances, Environmental Complaints, Notification of
Summons and Status of Prosecutions
Annex H
Monitoring Schedule for the Next Reporting Period
Executive
Summary
The SENT Landfill Extension (SENTX)
forms an integral part in the Strategic Plan in maintaining the continuity of
landfill capacity in the Hong Kong for the cost-effective and environmentally
satisfactory disposal of waste. ERM-Hong Kong, Limited (ERM) is
commissioned to undertake the role of Environmental Team (ET) for the
construction, operation/restoration and aftercare of SENTX Project (“the
Project”) in accordance with the requirements specified in the Environmental
Permit (EP), updated Environmental Monitoring and Audit (EM&A) Manual, the
approved Environmental Impact Assessment (EIA) Report of the Project taking
account of the latest design and other relevant statutory requirements.
The construction (not including works related to site clearance and
preparation) of the Project commenced on 2 January 2019.
This
Monthly EM&A report presents the EM&A works carried out during the
period from 1 to 30 November 2019 for the Project in accordance with the
updated EM&A Manual.
Exceedance
of Action and Limit Levels for Air Quality
No
exceedance of Action and Limit Levels for construction air quality monitoring
was recorded in the reporting period.
Exceedance
of Action and Limit Levels for Noise
No
exceedance of Action and Limit Levels for construction noise monitoring was
recorded in the reporting period.
Exceedance
of Action and Limit Levels for Surface Water Quality
Sampling
could not be carried out for all the scheduled impact surface water quality
monitoring events during the reporting period due to insufficient flow.
Environmental
Complaints, Summons and Prosecutions
There
were no complaints, notification of summons or prosecution recorded in the
reporting period.
Reporting
Change
There was no reporting change in the
reporting period.
Future
Key Issues
Potential
environmental impacts arising from the upcoming construction activities in the
next reporting period of December 2019 are mainly associated with dust emission
from the exposed area and loading and uploading operation of dusty materials.
1 Introduction
1.1 Background
The SENT Landfill Extension (SENTX)
forms an integral part in the Strategic Plan in maintaining the continuity of
landfill capacity in the Hong Kong for the cost-effective and environmentally
satisfactory disposal of waste. The
Environmental Impact Assessment (EIA) Report and the associated Environmental
Monitoring and Audit (EM&A) Manual for the construction, operation,
restoration and aftercare of the SENTX (hereafter referred to as “the Project”)
have been approved under the Environmental Impact Assessment Ordinance
(EIAO) in May 2008 (Register No.: AEIAR-117/2008) (hereafter referred to as
the approved EIA Report) and an Environmental Permit (EP-308/2008) (EP) was
granted by the Director of Environmental Protection (DEP) on 5 August
2008.
Since
then, applications for Variation of an Environmental Permit (No. VEP-531/2017)
were submitted to EPD and the Variation of Environmental Permits (EP-308/2008/A
and EP-308/2008/B) were granted on 6 January 2012 and 20 January 2017,
respectively, as the Hong Kong SAR Government has decided to reduce the scale
of the design scheme of SENTX assessed in the approved EIA Report and SENTX
will only receive construction waste. In May 2018, a Further
Environmental Permit (FEP) (FEP-01/308/2008/B) was granted to the SENTX’s
contractor, Green Valley Landfill, Limited (GVL).
ERM-Hong Kong, Limited (ERM) and
Meinhardt Infrastructure and Environment Limited (Meinhardt) are commissioned
to undertake the roles of Environmental Team (ET) and the Independent
Environmental Checker (IEC), respectively, to undertake the EM&A activities
for the Project in accordance with the requirements specified in the EP, updated
EM&A Manual ([1]),
approved EIA Report ([2])
taking account of the latest design and other relevant statutory requirements.
1.2
Project Description
The SENTX is a piggyback landfill,
occupying the southern part of the existing SENT Landfill (including its
infrastructure area) and 13 ha of Tseung Kwan O (TKO) Area 137. A layout
plan of the SENTX is shown in Figure 1.1. Under the latest design, the SENTX
has a net void capacity of about 6.5 Mm3 and provides an additional
lifespan of about 6 years, commencing operation upon exhaustion of the SENT
Landfill. The SENTX will receive construction waste only.
The key implementation milestones
of the Project are indicatively summarised in Table 1.1. The
construction works of the Project commenced on 2 January 2019.
Table
1.1 Estimated Key Dates of
Implementation Programme
|
Key Stage of
the Project |
Indicative
Date |
|
Start
construction |
2 January 2019 |
|
Commissioning
of new infrastructure facilities |
2020 |
|
Demolition of
existing infrastructure facilities |
2021 |
|
Start waste
intake at SENTX |
2021 or upon
exhaustion of SENT Landfill |
|
Estimated
exhaustion date of SENTX |
2027 |
|
End of
aftercare for SENTX |
2057 |
The major construction works of the
SENTX includes:
· Site formation
at the TKO Area 137 and the existing infrastructure area at SENT Landfill;
· Construction of
surface and groundwater drainage systems;
· Construction of
the leachate containment and collection systems;
· Construction of
new leachate and landfill gas treatment facilities, site offices, maintenance
yards at the new infrastructure area;
· Construction of
new pipelines to transfer the leachate and landfill gas collected from the
existing SENT Landfill to the treatment facilities at the new infrastructure
area;
· Construction of
the site access and new waste reception facilities; and
· Demolition of
the facilities at the existing SENT Landfill infrastructure area.
1.3 Scope
of the EM&A Report
This
is the Monthly EM&A Report for the Project which summarises the key
findings of the EM&A programme during the reporting period from 1 to 30
November 2019 for the construction works.
1.4
Project Organisation
The
organisation structure of the Project is presented in Figure 1.2.
Figure
1.2 Organisation Chart
Contact
details of the key personnel are summarised in Table 1.2 below.
Table
1.2 Contact Information of Key
Personnel
|
Party |
Position |
Name |
Telephone |
|
Contractor (Green Valley Landfill Limited) |
Project Manager |
Gary Barnicott |
2706 8827 |
|
Environmental Team (ET) (ERM-Hong Kong, Limited) |
ET Leader |
Frank Wan |
2271 3152 |
|
Independent
Environmental Checker (IEC) (Meinhardt
Infrastructure and Environment Limited) |
IEC |
Fredrick Leong |
2859 1739 |
1.5 Summary
of Construction Works
The
programme of the construction is shown in Annex A. As informed by the Contractor, the major
works carried out in this reporting period include:
·
Rebar fixing, concreting and formwork erection for the plinth and the fit-out
work for the control building of Landfill Gas Plant area and placing of
landfill gas generator;
·
Excavating, removing and replacing unsuitable fill materials;
·
Sediment trap remedial works;
·
Construction of drop inlet shaft and last bay of outlet box culvert;
·
Rebar fixing, formwork and concreting to the plinth of tanks at Leachate
Treatment Plant (LTP) and construction of superstructure of Bioplant buildings;
·
Rebar, formwork and concreting to the substructure of infrastructure buildings
(EPD, GVL and laboratory buildings);
·
Casting of maintenance building foundation;
·
Installation of ammonia stripping plant, equalization tank, sequencing batch
reactor tank and treated effluent tank at LTP area;
·
Construction of perimeter bund for Cell 1X and 2X;
·
Maintenance and improvement of the temporary surface water drainage;
·
Shotcreting and mass concrete for Buttress Wall;
·
Installing groundwater pipe works from East to West in Cell 2X;
·
CLP trench works;
·
Liner installation at Cell 1X; and
·
Construction of X9B channel.
The
implementation schedule of the mitigation measured recommended in the Updated
EM&A Manual is presented in Annex
B.
1.6
Summary of EM&A Programme Requirements
The
status for all environmental aspects are presented in Table 1.3.
The EM&A requirements remained unchanged during the reporting period.
Table
1.3 Summary of Status for the
Environmental Aspects under the Updated EM&A Manual
|
Parameters |
Status |
|
Air Quality |
|
|
Baseline Monitoring |
The results of baseline air quality monitoring were
reported in Baseline Monitoring Report and submitted to EPD under EP
Condition 3.3 |
|
Impact Monitoring |
On-going |
|
Noise |
|
|
Baseline Monitoring |
The results of baseline noise monitoring were reported in
Baseline Monitoring Report and submitted to EPD under EP Condition 3.3 |
|
Impact Monitoring |
On-going |
|
Surface Water Quality |
|
|
Baseline Monitoring |
The results of baseline surface water quality monitoring
were reported in Baseline Monitoring Report and submitted to EPD under EP
Condition 3.3 |
|
Impact Monitoring |
On-going |
|
Waste Management |
|
|
Waste Monitoring |
On-going |
|
Landscape and Visual |
|
|
Baseline Monitoring |
The results of baseline landscape and visual monitoring
were reported in Baseline Monitoring Report and submitted to EPD under EP
Condition 3.3 |
|
Construction Phase Audit |
On-going |
|
Site Environmental Audit |
|
|
Regular Site Inspection |
On-going |
|
Complaint Hotline and Email Channel |
On-going |
|
Environmental Log Book |
On-going |
Taking
into account the construction works, impact monitoring of air quality, noise,
surface water quality and waste management were carried out in the reporting
period. The monitoring schedule of air quality, noise and surface water
quality monitoring are provided in Annex C.
The
EM&A programme also involved environmental site inspections and related
auditing conducted by the ET for checking the implementation of the required
environmental mitigation measures recommended in the approved EIA Report and
relevant EP submissions. To promote the environmental awareness and
enhance the environmental performance of the contractors, environmental
trainings and regular environmental management meetings were conducted during
the reporting period, which are summarised as below:
Ÿ
One environmental management meeting was held with the Contractor, ER, ET, IEC
and EPD on 13 November 2019; and
Ÿ
Environmental toolbox trainings on Waste Reduction in Construction
Industry and Good Practice of Wastewater Management in Construction Sites were provided on 7 November and 26
November 2019 respectively by the Contractor to the workers.
1.7
Status of Statutory Environmental Compliance with the Environmental Permit
The
status of statutory environmental compliance with the EP conditions
under the EIAO, submission status under the EP and implementation status of
mitigation measures are presented
in Table 1.4.
Table
1.4 Status of Submissions required
under the EP and Implementation Status of Mitigation Measures
|
EP Condition |
Submission / Implementation Status |
Status |
|
2.3 |
Management Organisation of Main Construction Companies |
Submitted and accepted by EPD. |
|
2.4 |
Setting up of Community Liaison Group |
Community Liaison Group was set up. |
|
2.5 |
Submission of Detailed Landfill Gas Hazard Assessment
Report |
Submitted and accepted by EPD on 10 January 2019. |
|
2.6 |
Submission of Restoration and Ecological Enhancement Plan |
Submitted to EPD on 28 June 2019. |
|
2.7 |
Setting up of Trial Nursery |
Trial Nursery works was commenced on 28 August 2019. |
|
2.8 |
Advance Screen Planting |
Advance Screen Planting works were completed on 28 June
2019. |
|
2.9 |
Provision of Multi-layer Composite Liner System |
Under implementation. |
1.8
Status of Other Statutory Environmental Requirements
The
environmental licenses and permits (including EP, Water Pollution Control
Ordinance (WPCO) discharge license, registration as a chemical waste
producer, and construction noise permit) that are valid in the reporting period
are presented in Table 1.5. No non-compliance with environmental
statutory requirements was identified.
Table
1.5 Status of Statutory Environmental
Requirements
|
Description |
Ref No. |
Status |
|
Environmental Permit |
EP-308/2008 |
Granted on 5 August
2008 |
|
Variation of
Environmental Permit |
EP-308/2008/A |
Granted on 6 January
2012 |
|
EP-308/2008/B |
Granted on 20 January
2017 |
|
|
Further Environmental
Permit |
FEP-01/308/2008/B |
Granted on 16 May
2018 |
|
Water Discharge
License under WPCO (Permit Holder: Chun Wo) |
Licence No.:
WT00033525-2019 |
Validity from 27
March 2019 to 31 March 2024 |
|
Billing Account for
Disposal of Construction Waste |
Chit Account Number:
5001692 |
Approved on 28
December 2005 |
|
Registration as a
Chemical Waste Producer (Permit Holder: Chun Wo) |
5213-839-C3507-10 |
Issued on 23 August
2018 |
|
Registration as a
Chemical Waste Producer (Permit Holder: REC) |
5518-839-R2289-06 |
Issued on 24 October
2019 |
|
Construction Noise
Permit (Permit Holder: Chun Wo) |
GW-RE0695-19 |
Validity from 9
September 2019 to 3 March 2020 |
|
Construction Noise
Permit (Permit Holder: REC) |
GW-RE0831-19 |
Validity from 17
October 2019 to 30 December 2019 |
2 EM&A
Results
The
EM&A programme for the Project required environmental monitoring for air
quality, noise and surface water quality as well as environmental site
inspections for air quality, noise, surface water quality, waste management,
and landscape and visual impacts. The EM&A requirements and related
findings for each component are summarised in the following sections.
2.1 Air
Quality Monitoring
2.1.1 Monitoring
Requirements and Equipment
According
to the updated EM&A Manual of the Project, impact air quality monitoring
(dust, in term of Total Suspended Particulates (TSP)) was carried out
at the two designated monitoring locations (i.e. DM1 and DM2) at a 6-day
interval. As there
are two existing TSP monitoring stations (i.e. TKO-A1 and TKO-A2a) currently
operating by the Civil Engineering and Development Department (CEDD) to monitor
the 24-hour TSP levels at the proposed dust monitoring stations for the SENTX,
it is considered that the CEDD monitoring data can represent the dust condition
of the SENTX during the construction phase.
The
Action and Limit Levels of the air quality monitoring is provided in Table
2.1 below.
Table
2.1 Action and Limit Levels for
24-hour TSP
|
Monitoring Station |
Action Level |
Limit Level |
|
DM-1 – Site
Egress of TKO Area 137 Fill Bank |
204 µg m-³ |
260 µg m-³ |
|
DM-2A –Combined
Reception and Exit Office (CREO) of TKO Area 137 Fill Bank |
193 µg m-³ |
260 µg m-³ |
High volume air samplers (HVSs) in
compliance with the specifications listed under Section 3.2.2 of the updated
EM&A Manual were used to measure 24-hour TSP levels at the CEDD dust
monitoring stations. The HVSs were calibrated upon installation and
thereafter at bi-monthly intervals to check the validity and accuracy of the
results.
The
equipment used in the impact air quality monitoring programme and monitoring
locations are summarised in Table 2.2 and illustrated in Figure 2.1 respectively.
Copies of the calibration certificates for the equipment are presented in Annex D1.
Table
2.2 Dust Monitoring Details
|
Monitoring
Station |
Location |
Parameter
|
Frequency
and Duration |
Monitoring
Dates |
Equipment |
|
DM1 |
Site
Egress of TKO Area 137 Fill Bank |
24-hour
TSP |
Once
every 6 days during the construction phase of the Project |
6,
12, 18, 24, 30 November 2019 |
HVS
Greasby 105 (S/N: 9795 (ET/EA/003/18)) |
|
DM2 |
Combined Reception and Exit Office (CREO) of TKO
Area 137 Fill Bank |
HVS Andersen G1051 (S/N: 1176 (ET/EA/003/05)) |
2.1.2 Monitoring
Schedule for the Reporting Month
The
schedule for air quality monitoring during the reporting period is provided in Annex C.
2.1.3
Results and Observations
The
monitoring results for 24-hour TSP are summarised in Table 2.3.
The detailed monitoring results and the graphical presentation of the
24-hour TSP results at each monitoring location are provided in Annex D2.
Table
2.3 Summary of 24-hour TSP Monitoring
Results in the Reporting Period
|
Monitoring
Station |
Average
24-hr TSP Concentration (µg m-3) (Range in bracket) |
Action
Level (µg/m3) |
Limit
Level (µg/m3) |
|
DM-1
– Site Egress of TKO
Area 137 Fill Bank |
95
(84 - 106) |
204 |
260 |
|
DM-2A
–Combined Reception and Exit Office
(CREO) of TKO Area 137 Fill Bank |
100
(88 – 106) |
193 |
260 |
The
major dust sources in the reporting period included fugitive dust emission from
exposed area in SENTX, as well as nearby operations of the existing SENT
landfill and the TKO Area 137 Fill Bank.
All
the 24-hour TSP results were below the Action and Limit Levels at the
monitoring locations in the reporting period. No action is thus required
to be undertaken in accordance with the Event and Action Plan presented in Annex D3.
2.1.4 Meteorological
Data
Meteorological
data obtained from the on-site meteorological monitoring station at the
existing SENT landfill (see Figure 2.1) were used for the dust monitoring and are
shown in Annex D4.
The meteorological station will be relocated to a new position for SENTX as per
the updated EM&A Manual after the new infrastructure area at the SENTX is
constructed. It is considered that meteorological data obtained at the
existing the on-site meteorological monitoring station are representative of
the Project area and could be used for the construction phase dust monitoring
programme for the Project.
2.2 Noise
Monitoring
2.2.1 Monitoring
Requirements and Equipment
According
to the updated EM&A Manual of the Project, impact noise monitoring was
conducted weekly at the monitoring location (i.e. NM1) to obtain one set of 30
minutes measurement between 07:00 and 19:00 hours on normal weekdays.
The
Action and Limit Levels for construction noise of the Project are provided in Table
2.4 below.
Table
2.4 Action and Limit Levels for
Construction Noise
|
Time Period |
Action Level (a) |
Limit Level (b) |
|
07:00 – 19:00 hrs on normal weekdays |
When one documented complaint is received from any
one of the noise sensitive receivers (NSRs) or 75 dB(A) recorded at the monitoring station |
75 dB(A) at NSRs |
|
Notes: (a)
75dB(A) along and at about 100m from the SENTX site boundary was set as the
Action Level. (b)
Limits specified in the GW-TM and IND-TM for construction and operational
noise, respectively. |
||
Noise
monitoring was performed by ALS Technichem (HK) Pty Ltd. (HOKLAS Registration
No. 066) using sound level meter at the designated monitoring station NM1 (see Figure
2.1Figures\Figure 2.1.pdf)
in accordance with the requirements stipulated in the updated
EM&A Manual. Acoustic calibrator was deployed to check the
sound level meter at a known sound pressure level. Details of the
deployed equipment are provided in Table 2.5. Copies of the
calibration certificates for the equipment are presented in Annex E1.
Table
2.5 Noise Monitoring Details
|
Monitoring Station (1) |
Location |
Parameter |
Frequency and Duration |
Monitoring Dates |
Equipment |
|
NM1 |
SENTX Site Boundary (North) |
Leq (30 min) measurement between 07:00 and
19:00 hours on normal weekdays (Monday to Saturday) |
Once per week for 30 mins during the construction period of the Project |
7, 15, 21, 28 November 2019 |
Sound Level Meter: B&K 2238 (S/N: 2285762) Acoustic Calibrator: Rion NC-75 (S/N: 34680623) |
2.2.2 Monitoring
Schedule for the Reporting Month
The
schedule for noise monitoring during the reporting period is provided in Annex C.
2.2.3 Results
and Observations
A
total of 4 impact noise monitoring events were scheduled during the reporting
period. Results for noise monitoring are summarised in Table 2.6.
The monitoring results and the graphical presentation of the data are
provided in Annex E2.
Table
2.6 Summary of Construction Noise
Monitoring Results in the Reporting Period
|
Monitoring
Station |
Measured Noise Level Leq (30 min),
dB(A) |
||
|
Average |
Range |
Action and Limit Level |
|
|
NM1 |
54.0 |
52.1 – 57.0 |
75 |
Major
noise sources identified during the noise monitoring included noise from
operations of the existing SENT landfill and the TKO Area 137 Fill Bank,
aircrafts and insects.
No
Action and Limit Levels exceedance was recorded for construction noise
monitoring in the reporting period. No action is thus required to be
undertaken in accordance with the Event and Action Plan presented in Annex E3.
2.3 Surface
Water Quality Monitoring
2.3.1
Monitoring Requirements and Equipment
According
to the updated EM&A Manual of the Project, impact surface water quality
monitoring were carried out at the three designated surface water discharge
points (i.e. DP3, DP4 and DP6) weekly to ensure that the SENTX will not cause
adverse water quality impact. Temporary relocation of surface water
discharge point DP4 to DP4 (Future, temporary) as an interim arrangement due to
site constraints and construction sequence was approved by EPD on 14 May
2019. Surface water quality monitoring was carried out at DP4 (Future,
temporary) (i.e. DP4T) from the monitoring event on 16 May 2019. In
addition, suspension of impact surface water quality monitoring at DP3 was
approved under the Baseline Monitoring Report by EPD on 24 July 2019 until the
actual commencement of construction works affecting DP3 in 2021.
Dissolved
Oxygen (DO) and pH value were measured in-situ whereas the level of suspended
solids (SS) were determined by ALS Technichem (HK) Pty Ltd. (HOKLAS
Registration No. 066).
The
Action and Limit Levels of the surface water quality impact monitoring are
provided in Table 2.7.
Table
2.7 Action and Limit Levels for
Surface Water Quality
|
Parameters |
Action Level |
Limit Level |
|
|
DP4 & DP6 |
|
|
DO |
< 5.80 mg/L |
< 5.42 mg/L |
|
SS |
> 11.7 mg/L |
> 12.7 mg/L |
|
pH |
> 8.39 |
> 8.40 |
The locations of the monitoring
stations for the Project are shown in Figure 2.1. All in situ monitoring
instruments were checked, calibrated and certified by a laboratory accredited
under HOKLAS or other international accreditation scheme before use, and
subsequently re-calibrated at 3 monthly intervals throughout all stages of the
surface water quality monitoring programme. Calibration for a DO meter
was carried out before measurement according to the instruction manual of the
equipment model. Details of the equipment used in the impact surface water quality
monitoring works are provided
in Table 2.8. Copies of the calibration certificates for the
equipment are presented in Annex
F1.
Table
2.8 Impact Surface Water Quality
Monitoring Details
|
Monitoring
Station |
Location |
Frequency |
Monitoring
Dates |
Parameter |
Equipment |
|
DP4
(Future, temporary) |
Surface
water discharge point DP4 |
Weekly |
7,
15, 21, 28 November 2019 |
•pH •DO •SS |
YSI
Professional DSS (S/N: 15H102620) |
|
DP6 |
Surface
water discharge point DP6 |
||||
|
Notes: (a)
DP4 was temporary relocated to DP4 (Future, temporary) (i.e. DP4T) as an
interim discharge point from the monitoring event on 16 May 2019. (b)
Impact surface water quality monitoring at DP3 was suspended from the
monitoring event on 25 July 2019 until the actual commencement of
construction works affecting DP3 in 2021. |
|||||
2.3.2 Monitoring
Schedule for the Reporting Month
The
schedule for surface water quality monitoring during the reporting period is
provided in Annex C.
2.3.3
Results and Observations
A total of 4 monitoring events for
impact surface water quality monitoring were scheduled at all designated
monitoring stations during the reporting period. However, sampling could
not be carried out for all the scheduled events during the reporting period due
to insufficient flow. Details of impact water quality monitoring events
are provided in Annex
F2.
No
action is thus required to be undertaken in accordance with the Event and
Action Plan presented in Annex
F3.
2.4 Landscape
and Visual Monitoring
2.4.1 Monitoring
Requirements
According
to the updated EM&A Manual of the Project, the monthly landscape and visual
audit was conducted on 26 November 2019 to monitor the
implementation of the landscape and visual mitigation measures during
construction phase.
All
relevant environmental mitigation measures listed in the approved EIA Report
and the updated EM&A Manual and their implementation status are summarised
in Annex B.
2.4.2 Results
and Observations
The
Contractor has implemented environmental mitigation measures as stated in the
approved EIA Report and the EM&A Manual.
Regarding
the landscape and visual audit, the Contractor was reminded to maintain the
advance screen planting works as soon as possible to ensure effective screening
of views of project works from the High Junk Peak Trail. . The Contractor
shall consider the mitigation measures during the design phase, including the
preparation of the Construction Drawings and Detailed Landscape Design
Drawings.
2.5 EM&A
Site Inspection
Site inspections were carried out
on a weekly basis with the Contractor, IEC and ER to monitor the implementation
of proper environmental pollution control and mitigation measures for air quality, noise, surface water
quality and waste management under the Project. In the reporting period, 4
site inspections were carried out on 7, 13, 21 and 28 November 2019.
Key observations during the site inspections are
summarised in Table 2.9.
Table
2.9 Key Observations Identified
during the Site Inspection in this Reporting Month
|
Inspection Date |
Environmental Observations and
Recommendations |
|
7 November 2019 |
- |
|
13 November 2019 |
·
The Contractor shall clear and
dispose of the general refuse at DP4T channel to reduce pest and odour
issues. ·
The Contractor shall replace the
NRMM labels on the roller and excavator near DP4T to ensure all NRMM labels
displayed on site are clearly visible and in correct size as specified in the
APCO. |
|
21 November 2019 |
·
The Contractor shall enhance watering to the site, especially around areas
with loading and unloading activities. ·
The Contractor shall clear the oil spillage at the roller near DP4T and
handle the clean-up materials as chemical waste. ·
The Contractor shall avoid accumulation of liquid in the drip tray near
buttress wall and shall treat the clean-up materials as chemical waste. ·
The Contractor shall store the general refuse near sediment trap properly in
a refuse skip and dispose of the waste regularly to reduce pest and odour
issues. |
|
28 November 2019 |
·
The Contractor shall increase watering frequency and enhance watering to the
site, especially to the main haul road and around works areas in Cell 2X. ·
The Contractor shall avoid accumulation of stagnant water and remove the
waste disposed at X9B culvert. ·
The Contractor shall dispose of the chemical waste in the refuse skip near
buttress wall separately in the chemical waste cabinet. ·
The Contractor shall dispose of the general refuse accumulated near EPD
building and bioplant building regularly to reduce odour and pest issues. |
The
Contractor has rectified all of the observations identified during
environmental site inspections in the reporting period. Key environmental
deficiencies identified and the corresponding rectification actions are
presented in Table 2.10.
Table
2.10 Summary of Environmental Deficiencies Identified
and Corresponding Rectification Actions
|
Deficiencies |
Rectifications
Implemented |
Proposed
Additional Control Measures |
|
Surface Water |
||
|
Intercepting channels
& drainage system |
·
Reviewed
drainage plan. |
·
Addition
of channels. ·
Expedite
the construction of permanent sediment trap and discharge culverts. |
|
DP channels (design
& regular silt removal) |
·
Carried out regular maintenance and cleaning of channels. ·
DP4 channel: Area near the channel was paved with concrete and a bund
was built. ·
DP6 channel: Gravel piles on the channel were covered with concrete
which serve as blocks for running water and to divide the channel into
several sections. A pump was placed in the water zone in the upstream section
to pump water to the Wetsep for treatment prior to the discharge to the last
section before the weir plate. ·
DP6: Pipes through the gravel piles between different channel sections
were covered with geotextiles to block debris and silt. |
N.A. |
|
Stockpiles &
exposed soil |
·
Installed silt fencing near surface water channel along DP6 channel. |
·
Improve
soil covering. ·
Compaction
and cover for stockpiles and soil slopes. |
|
Wetsep (treatment
capacity & number) |
·
Reviewed
Wetsep capacity. ·
Chemicals
dosage of the Wetsep was increased to enhance the efficiency. |
·
Install
additional Wetsep. |
|
Backflow / ponding
during heavy rainfall |
·
Raised
with EPD (LDG) and CEDD. |
N.A. |
2.6
Waste Management Status
The
Contractor has registered as chemical waste producer under the Contract.
Sufficient numbers of receptacles were available for general refuse collection
and sorting.
As
informed by the Contractor, waste generated during this reporting period
include mainly inert C&D materials. Reference has been made to the
waste flow table prepared by the Contractor. The quantities of different
types of wastes and imported fill materials are summarised in Table 2.11.
Table
2.11 Quantities of Different Waste Generated and
Imported Fill Materials
|
Month/ Year |
Inert
C&D Materials (a) |
Imported
Fill |
Inert
Construction Waste Re-used |
Non-inert
Construction Waste (b) |
Recyclable
Materials (c) (in ‘000kg) |
Chemical
Wastes |
|
|
Rock |
Soil |
||||||
|
1
– 30 November 19 |
0.410 |
0 |
17130.00 |
0 |
0.077 |
0 |
0 |
|
Notes: (a)
Inert construction wastes include hard rock and large broken concrete, and
materials disposed as public fill. Density assumption: 1.6 (kg/L) for
public fill. (b)
Non-inert construction wastes include general refuse disposed at landfill.
Density assumption: 0.9 (kg/L) for general refuse. (c)
Recyclable materials include metals, paper, cardboard, plastics and others. |
|||||||
2.7 Implementation
Status of Environmental Mitigation Measures
A
summary of the Environmental Mitigation Implementation Schedule is presented in
Annex B. The
necessary mitigation measures were implemented properly for the Project.
2.8 Summary
of Exceedances of the Environmental Quality Performance Limit
The
24-hour TSP monitoring results and construction noise monitoring results
complied with the Action and Limit Levels in the reporting period.
Impact surface water
quality monitoring could not be carried out for all the scheduled events during
the reporting period due to insufficient flow.
Cumulative
statistics on exceedances is provided in Annex G.
2.9
Summary of Complaints, Notification of Summons and Successful Prosecutions
There
were no complaints, notification of summons or prosecution recorded in the
reporting period.
Statistics
on complaints, notifications of summons, successful prosecutions are summarised
in Annex G.
3 Future Key Issues
3.1 Construction
Programme for the Coming Month
As
informed by the Contractor, the major works for the Project in December 2019
will be:
·
Site
clearance, preparation and formation of Area X1 and X2;
·
Excavation
and removal of unsuitable fill materials;
·
Remaining
site formation works at Area X1;
·
Filling
of perimeter bund for Cell 1X and Cell 2X;
·
Construction
of buttress wall;
·
Construction
of perimeter wall and plinths at LTP area and substructure of bioplant;
·
Installation
of ammonia stripping plant and pipe work at LTP area;
·
Construction
of discharge box culvert;
·
Construction
of superstructure of new infrastructure buildings;
·
Completing
the remaining plinths and superstructure of Landfill Gas Plant area;
·
Fitting
out work inside the CLP room and Landfill Gas Plant room;
·
Construction
of X9B channels and apron
channel along the toe of eastern perimeter bund;
·
Construction
of groundwater pipe from south to north at Cell 2, 3 and 4;
·
Construction
of superstructure at maintenance building;
·
Installation
of equalization and sequencing batch reactor tanks and other equipment at LTP
area;
·
Installation
of settlement cells;
·
Installation
of monitoring wells; and
·
Liner
installation.
3.2 Key
Issues for the Coming Month
Potential
environmental impacts arising from the above upcoming construction activities
in the next reporting period of December 2019 are mainly associated with dust
emission from the exposed area and loading and uploading operation of dusty
materials. The ET will keep track on the construction works to confirm
compliance of environmental requirements and the proper implementation of all
necessary mitigation measures.
3.3 Monitoring
Schedule for the Coming Month
The
tentative schedules for environmental monitoring in December 2019 are provided in Annex H.
4 Conclusion
and Recommendation
This EM&A Report presents the
findings of the EM&A activities undertaken during the period from 1 to 30
November 2019 in accordance with the updated EM&A Manual and the
requirements of the Environmental Permit (EP-308/2008/B).
Air quality (24-hour TSP), noise
and water quality (DO, pH and SS) monitoring were carried out in the reporting
period. Results for air quality monitoring (24-hour TSP) complied with
the Action and Limit Levels in the reporting period. No Action and Limit
Levels exceedances were recorded for construction noise monitoring. Impact surface water quality monitoring
could not be carried out for all the scheduled events during the reporting
period due to insufficient flow.
Environmental
site inspections were carried out during the reporting period.
Recommendations on remedial actions were given to the Contractor for the
deficiencies identified during the site inspections.
There
were no complaints, notification of summons or prosecution recorded in the
reporting period.
The
ET will keep track on the construction works to confirm compliance of
environmental requirements and the proper implementation of all necessary
mitigation measures.