1.1.1
CRBC-Kaden Joint Venture (hereafter
“CRBC-Kaden JV”) is commissioned by the Highways Department (HyD) as the Main Contractor of the Contract No. HY/2013/12 – Northern Connection Toll Plaza and
Tunnel Section ((hereafter “the Contract”) and this Contract is part of the Tuen Mun – Chek
Lap Kok Link (TM-CLK Link Project). TM-CLK Link Project is a Designated
Project under Environmental Permit number VEP-354/2009C issued on 10 December 2014. The layout
Plan of the Project and the Contract are showed in Appendix A and B
respectively.
1.1.2
The construction works
of the Contract mainly include:-
a.
construction of an approximately 5.4 hectares
toll plaza and an associated footbridge;
b.
construction of associated carriageways
including approximately 0.74 kilometre land viaducts,
and an approximately 230 metres vehicular underpass
to connect the toll plaza and the roundabout at Lung Mun Road/Lung Fu Road;
c.
site formation for the construction of the
toll plaza, including associated slope works and natural terrain hazard
mitigation measures;
d.
modification and realignment of the existing
Lung Mun Road and Lung Fu Road; and
e.
associated
waterworks, drainage, sewerage and landscaping works, etc..
1.1.3
This is 2nd
monthly EM&A report presenting the monitoring results and inspection
findings for period from 1 to 31 December 2014.
1.2.1
The Monthly Environmental Monitoring and
Audit (EM&A) Report is structured into the following sections:-
Section 1 Introduction
Section 2 Contract
Organization and Construction Progress
Section 3 Summary
of Impact Monitoring Requirements
Section 4 Air
Quality Monitoring
Section 5 Ecology
Monitoring
Section 6 Cultural
Heritage
Section 7 Landscape
and Visual
Section 8 Landfill
gas hazard Monitoring
Section 9 Waste
Management
Section 10 Site Inspections
Section 11 Environmental
Complaints and Non-Compliance
Section 12 Implementation
Status of Mitigation Measures
Section 13 Conclusions
and Recommendations
2.1.1
The Contract organization and contact details
of key personnel are shown in Appendix
C.
2.2.1
In the Reporting Period, the major
construction activity conducted under the Contract is summarized in below. The master construction program of the
Contract is enclosed in Appendix D.
Ÿ
Site Formation – Portion X
Ÿ
Slope stabilization works – Portion X
Ÿ
Surface drainage – Portion X
Ÿ
Ground Investigation Works – Various Locations
Ÿ
Site Clearance – Various Locations
Ÿ
Retaining Wall – Portion X and Portion I
Ÿ
Piling Works – Portion I
Ÿ
Tree Felling – Portion I
Ÿ
Tree Survey
2.3
Summary of Environmental Submissions
2.3.1
The environmental submissions under the EP
requirement had been submitted to the EPD and they are listed in below:
Ÿ
Monitoring Plan on Construction Dust
(submission refer to Contract HY/2012/08)
Ÿ
Landscape and Visual Plan (not yet endorsed by EPD)
Ÿ
Waste Management Plan (not yet endorsed by EPD)
Ÿ
Baseline Monitoring Report (not yet endorsed
by EPD)
2.3.2
Summary of environmental
permits, licenses and notifications for the Contract is presented in Table 2-1.
Table 2-1 Status of Environmental
Licenses and Permits of the Contract
|
No.
|
Type of Permit/
License
|
Submission Date
|
Reference/
License No.
|
Date of Issue
|
Date of Expiry
|
|
1
|
Air pollution Control (Construction Dust)
Regulation
|
06-08-2014
|
377719
|
06-08-2014
|
N/A
|
|
2
|
Chemical Waste Producer Registration -
Waste Producers Number
|
06-08-2014
|
5117422C389301
|
03-09-2014
|
N/A
|
|
3
|
Water Pollution Control Ordinance -
Discharge License
|
13-08-2014
|
WT00020065-2014
|
29-09-2014
|
30-09-2019
|
|
4
|
Waste Disposal Regulation - Billing Account
for Disposal of Construction Waste
|
21-07-2014
|
7020460
|
01-08-2014
|
N/A
|
|
5
|
CNP for
Construction of Site Office
|
15-08-2014
|
GW-RW0656-14
|
03-09-2014
|
22-02-2015
|
|
6
|
CNP for
Concreting
|
15-09-2014
|
GW-RW0748-14
|
29-09-2014
|
29-03-2015
|
|
7
|
CNP for
Site Formation
|
15-09-2014
|
GW-RW0761-14
|
29-09-2014
|
29-03-2015
|
|
8
|
CNP for
Multiple Task
|
05-12-2014
|
GW-RW0949-14
|
05-12-2014
|
04-05-2015
|
3.1.1
The major construction
activities under the Contract are land-based and no marine work will be
involved. In accordance with the
Project EM&A Manual requirements, the environmental aspect under the
Contract shall be included air quality, ecological, cultural heritage, landscape
and visual, landfill gas and site inspection during
construction period. In addition,
audit of the contractor’s implementation of the construction noise and
land-based water quality pollution control measures are also required for the
Contract.
3.1.2
A summary of construction phase EM&A
requirements are presented in the
sub-sections below.
3.2.1
The construction phase monitoring air quality
shall cover the following parameters:
•
1-hour TSP; and
•
24-hour TSP
3.3.1
The air quality monitoring stations for impact monitoring are listed in Table 3-1 and illustrated in Appendix E.
Table 3-1 Air
Quality Monitoring Stations under the Contract
|
ID
|
Location
|
Air monitoring station Description
|
|
ASR1
|
Tuen Mun Fireboat Station
|
EM&A Manual
|
|
ASR5
|
Pillar Point Fire Station
|
EM&A Manual
|
|
AQMS1
|
Previous River Trade Golf
|
Enhanced TSP Level under EP
condition 2.4
|
|
ASR6
|
Butterfly Beach Laundry
|
Enhanced TSP Level under EP
condition 2.4
|
|
ASR10
|
Butterfly Beach Park
|
Enhanced TSP Level under EP
condition 2.4
|
3.4.1
As per Condition 2.4 of
the EP of TM-CLKL, an enhanced monitoring plan on TSP level at Tuen Mun (“the
Enhanced TSP Monitoring Plan”) is required to be submitted to the DEP for
approval at least 1 month before the commencement of construction of the Project.
Details of the Enhanced TSP
Monitoring Plan under Contract No. HY/2012/08 could be found from the project
website. The air quality monitoring work under this Contract will follow the
monitoring requirement of enhanced TSP monitoring under the project.
3.4.2
The air quality
monitoring requirements for the Contract is summarized in Table 3-2.
Table 3-2 Enhanced TSP Monitoring Plan –
Construction Phase
|
Condition
|
Monitoring
Parameter
|
Monitoring
Location
|
Frequency
|
Monitoring Requirement
|
|
General
|
1-hour TSP
|
ASR1, ASR5, AQMS1, ASR6, ASR10
|
3 times per day every six days
|
Throughout the Northern Connection, toll plaza and tunnel buildings
construction works
|
|
24-hour TSP
|
ASR1, ASR5, AQMS1, ASR6, ASR10
|
Daily every six days
|
|
Special
|
1-hour TSP
|
ASR1, ASR5, AQMS1, ASR6, ASR10
|
3 times per day every three days
|
Northern Connection
During excavation works for launching shaft, excavation work for Cut and
Cover Tunnel and Cut and Cover Tunnel Construction
Toll Plaza
During excavation, slope works, construction of road and superstructures
and wind erosion from open sites and stockpiling areas
Tunnel Buildings
During excavation, foundation works, construction of superstructures and
wind erosion from open sites and stockpiling areas
|
|
24-hour TSP
|
ASR1, ASR5, AQMS1, ASR6, ASR10
|
Daily every three days
|
3.5.1
The 24-hour and 1-hour TSP levels shall be
measured by following the standard high volume sampling method as set out in
the Title 40 of the Code of Federal
Regulations, Chapter 1 (Part 50), Appendix B.
3.5.2
A high volume sampler in
compliance with the following specifications shall be used for carrying out the
1-hr and 24-hr TSP monitoring:
(i)
0.6-1.7 m3/min (20-60
SCFM) adjustable flow range;
(ii)
equipped with a
timing/control device with +/- 5 minutes accuracy for 24 hours operation;
(iii)
installed with
elapsed-time meter with +/- 2 minutes accuracy for 24 hours operation;
(iv)
capable of providing a
minimum exposed area of 406 cm2 (63 in2);
(v)
flow control accuracy:
+/- 2.5% deviation over 24-hr sampling period;
(vi)
equipped with a shelter
to protect the filter and sampler;
(vii)
incorporated with an
electronic mass flow rate controller or other equivalent devices;
(viii) equipped with a flow recorder for continuous monitoring;
(ix)
provided with a peaked
roof inlet;
(x)
equipped with a
manometer;
(xi)
able to hold and seal
the filter paper to the sampler housing in a horizontal position;
(xii)
easy to change the
filter; and
(xiii)
capable of operating continuously for 24-hr period.
3.5.3
Calibration of dust
monitoring equipment shall be conducted by the ET upon installation and in
bi-monthly intervals during construction phase. The transfer standard shall be traceable
to the internationally recognized primary standard and be calibrated annually.
The calibration data shall be properly documented for future reference by
concerned parties, such as the IEC. All the data shall be converted into
standard temperature and pressure condition.
3.5.4
The filter paper of 24-hour TSP measurement shall be determined by HOKLAS
accredited laboratory.
3.5.5
If the ET proposes to
use a direct reading dust meter to measure 1-hr TSP levels on an ad hoc basis,
he shall submit sufficient information to the IEC to prove that the instrument
is capable of achieving a comparable result as that the High Volume Sampler
(HVS) and may be used for the 1-hr sampling. The instrument should also be calibrated
regularly and the 1-hr sampling shall be checked periodically by the HVS to
check the validity and accuracy of the results measured by the direct reading
method.
3.5.6
According to the Project EM&A Manual,
wind data monitoring equipment shall also be provided and set up for logging
wind speed and wind direction near the dust monitoring locations. The equipment installation location shall
be proposed by the ET and agreed with the IEC. For
installation and operation of wind data monitoring equipment, the following
points shall be observed:
(i)
the wind sensors should
be installed on masts at an elevated level 10 m above ground so that they are
clear of obstructions or turbulence caused by the buildings;
(ii)
the wind data should be
captured by a data logger to be down-loaded for processing at least once a
month;
(iii)
the wind data monitoring
equipment should be re-calibrated at least once every six months; and
(iv)
wind direction should be divided into 16 sectors of 22.5 degrees each.
3.6.1
The baseline monitoring
results formed the basis for determining the air quality criteria for the
impact monitoring. The ET shall compare the impact monitoring results with air
quality criteria set up for 24-hour TSP and 1-hour TSP. Based on results of the approved
Baseline Monitoring Report of HyD Contract
HY/2012/08, the Action and Limit Levels for impact dust monitoring are shown in
Tables
3-3.
Table
3-3 Action
and Limit Levels for Impact Air Quality Monitoring
|
Air Quality Monitoring Stations
|
24-hour TSP (μg/m3)
|
1-hour TSP (μg/m3)
|
|
Action Level
|
Limit Level
|
Action Level
|
Limit Level
|
|
ASR1
|
213
|
260
|
331
|
500
|
|
ASR5
|
238
|
260
|
340
|
500
|
|
AQMS1
|
213
|
260
|
335
|
500
|
|
ASR6
|
238
|
260
|
338
|
500
|
|
ASR10
|
214
|
260
|
337
|
500
|
3.6.2
Should non-compliance of the environmental
quality criteria occurs, remedial actions will be triggered according to the
Event and Action Plan which presented in Appendix F.
Noise
3.7.1
The TM-CLKL EIA study stated
that no existing noise sensitive receiver (NSR) was identified within the Study
Area at Tuen Mun. Therefore, no
noise monitoring is required for the construction phase of the Contract.
3.7.2
Regular site inspections
and audits will be carried out during the construction phase in order to
confirm the construction works under the Contract comply with the regulatory
noise requirements.
Water Quality
3.7.3
No marine works will be
undertaken under the Contract. Therefore,
no water quality monitoring is required for the construction phase of the
Contract.
Ecology
3.7.4
No marine works will be
undertaken under the Contract and generated marine ecological impact, no dolphin monitoring
is required for the construction phase of the
Contract.
3.7.5
During construction phase, the ET
will perform Pitcher Plants inspection at least once every week to report the growth condition and protection measures.
Landscape and Visual
3.7.6
Measures to mitigate landscape and visual impact
during construction should be checked and monitored by a Registered Landscape
Architect to ensure compliance with the intended aims of the mitigation
measures in accordance with the EM&A Manual.
Cultural Heritage
3.7.7
Grave G1 as a heritage resource is situated near the proposed
toll plaza in Tuen Mun. Site inspections should be
undertaken at least once per week throughout the construction period to ensure
compliance with the intended aims of recommended mitigation measures.
Landfill Gas
3.7.8
During EIA study,
landfill gas hazards are likely to be generated from the Pillar Point Valley (PPV)
Landfill. Landfill
gas
monitoring is recommended during construction of the
Contract to ensure
the works area is free of landfill gas before the worker entered the concerned
area.
3.8.1
The monitoring schedule
for L&V and landfill gas for the present and next reporting period are
presented in Appendix G.
4.1.1
The air quality impact monitoring and enhanced
Total Suspended Particulates (TSP) level monitoring at five proposed locations are
currently carried out by the ET of Contract HY/2012/08. Sharing of impact air quality monitoring
data between HY/2012/08 and HY/2013/12 is agreed by all relevant parties. The Contract is not required to conduct
its own dust monitoring exercise until the Contract HY/2012/08 ends.
4.2.1
In the Reporting Period, 1- hour TSP and 24-hour
TSP monitoring were carried out at five proposed locations by the ET of Contract
HY/2012/08. The detailed information
of air quality monitoring could be referred to the Monthly EM&A Reports of
the Contract HY/2012/08 (December 2014).
4.3.1
According to the air quality monitoring
result provided by Contract HY/2012/08, no exceedances in 24-hour TSP were
recorded but two (2) exceedances of 1-hour TSP were triggered in the Reporting
Period. Notification on Exceedances
(NOEs) to all relevant parties has been issued by the ET of Contract HY/2012/08
upon the results was confirmed. The
summary of air quality exceedance in the Reporting Period is shown in Table
4-1.
Table 4-1 Summary
of Air Quality Monitoring Exceedance
|
Date of Exceedance
|
Monitoring Station
|
Air Quality Parameter
|
Result
|
Exceed
|
|
2 December 2014
|
ASR5
|
1-hour TSP
|
346μg/m3
|
Action Level
|
|
17 December 2014
|
AQMS1
|
1-hour TSP
|
348μg/m3
|
Action Level
|
4.4.1
Investigation for the
exceedances has been undertaken by the ET of the Contract. Investigation reports for the cause of
exceedances have been submitted to relevant parties and enclosed in Appendix
J.
1-hour TSP exceedance on
2 December 2014
4.4.2
According to site
information provided by CRBC-Kaden JV, site formation works was conducted on 2
December 2014. There were 12 nos.
of rock breakers, 10 nos. of excavators operated. To reduce to dust impact arises from the
contract. mitigation measures for construction dust control were implemented
and they are included the following:-
Ÿ
4 nos. of water trucks were arranged on haul road to
keep road surface wet (refer to photo 1-4 and 8)
Ÿ
to set speed control at 5 km/hr for all vehicles using
the haul road
Ÿ
most soil stockpiles were well compacted
Ÿ
installation of auto-water sprinkler in dusty area
Ÿ
provide water spraying during rock breaking work
Ÿ
covered part of the exposed slopes by geotextile net
4.4.3
During site inspection
on 5 and 12 December 2014, it was observed that the dust mitigation measures
were implemented and the site condition is acceptable. Photo showing the
implemented dust mitigation measures on 12 December 2014 are shown in photo
record.
4.4.4
There are other
monitoring locations closer to the active site area, such as AQMS1 and ASR6,
and the relevant monitoring results were reviewed. With referenced to the
monitoring results collected at other stations, AQMS1 is ranged 93-124μg/m3 and
ASR6 is ranged 73-106μg/m3 and no exceedances were triggered.
4.4.5
According to the wind direction and wind speed data,
north-easterly wind at 2m/s was blowing between 3:00pm to 4:00pm. AQMS1 and ASR6 were located at upstream
of ASR5 and monitoring was undertaken at similar time, but there were no
exceedances recorded at both AQMS1 and ASR6. Therefore, it was considered that the
exceedance at ASR5 was unlikely due to construction dust.
4.4.6
During the course of monitoring, no construction works
was conducted at Portion N6 near Tuen Mun Fire Station on 2 December 2014.
However, heavy traffic was observed at Lung Mun Road and River Trade
Terminal. It is considered the heavy
traffic deteriorated the air quality along the area of Lung Mun Road and River
Trade Terminal. Since ASR5 was
located adjacent to Lung Mun Road, it was highly impacted by the road traffic.
4.4.7
Based on above investigation, the exceedance is
unlikely related to the Contract work and no corrective action was required
accordingly.
1-hour TSP exceedance on
17 December 2014
4.4.8
According to site information provided by CRBC-Kaden
JV, site formation works was conducted on 17 December 2014. There were 11 nos. of rock breakers, 9
nos. of excavators and 3 drill works operated. To reduce the dust impact arises from
the contract. mitigation measures for construction dust control were
implemented and they are included the following:-
Ÿ
4 nos. of water trucks were arranged on haul road to
keep road surface wet
Ÿ
Soil stockpiles were compacted and hydro-seeded.
Ÿ
Covered of the exposed slopes by geotextile net
Ÿ
provide water spraying during rock breaking work
Ÿ
installation of auto-water sprinkler in dusty area
Ÿ
to set speed control at 5 km/hr for all vehicles using
the haul road
4.4.9
During the course of monitoring, no construction works
was conducted at AQMS1. According
to the wind direction and wind speed data, north-easterly wind at 2.7m/s was
blowing between 3:00pm to 4:00pm.
There was other monitoring location closer to the active site area, such
as ASR6, receiving the same dust impact from the site. With referenced to the
monitoring results collected at other stations, ASR6 is ranged 91-181μg/m3 and
no exceedances were triggered.
4.4.10
TCRBC-Kaden JV was advised to enhance the dust
mitigation measures upon receipt the exceedance. As new dust control measures,
hydro-seeded on the exposed slopes was implemented on 17 December 2014.
4.4.11
There was consecutive 3 times of 1-hour TSP
monitoring taken on 17 December 2014 and only one exceedance was recorded. Moreover, there were no exceedances
recorded after hydro-seeded applied on the exposed slope as an enhanced dust
mitigation measures. It is
considered that the exceedance was a single event. The Contractor should continue implement
the dust control measures for the contract.
5.1.1
According to the
EM&A Manual requirements, regularly
inspection for Pitcher Plants shall be conducted at least once every week to report the growth condition and protection measure of the Pitcher Plants during construction period.
5.2.1
In the Reporting Period,
inspections for the condition of the Pitcher Plants and mitigation measures were
carried out by the ET on 2nd, 9th, 17th, 23rd
and 30th December 2014.
5.2.2
On 2nd and 9th
December 2014, it was observed that chain link fencing has been provided as the
temporary protection for pitcher plant in Zone 1-10. No construction activities were found to
be conducted nearby the protected areas of Pitcher Plants and the growth of
Pitcher Plants is kept in normal condition.
5.2.3
Permission for
transplantation of Pitcher Plant was issued by the AFCD on 9th
December 2014. 280 numbers of Pitcher Plant individuals located at Zones 1 - 7 were transplanted to the
nursery site on 17th December 2014 by the accredited person and his
assistant. The transplantation work was strictly followed to conditions on
permit.
5.2.4
During site inspection
on 17th, 23rd and 30th December 2014, it was
observed that the transplanted pitcher plants in nursery site was protected by
the scaffold structure which surrounded by chain link fencing. There was no breached or damaged observed for the erected
fencing and the condition of the transplanted pitcher plant was normal. For those unaffected pitcher plant
located in Zone 8 – 10, inspection was randomly undertaken for Zones 8, 9 and
10 during weekly site inspection.
It was observed that the Pitcher Plants at these areas were fenced off
by chain link fence to avoid encroachment of
personnel on to these areas.
5.2.5
During each occasion of
site inspection, no construction activities were found to be conducted nearby the
protected areas of Pitcher Plants and the growth of Pitcher Plants is kept
normal condition.
6.1.1
According to the EM&A Manual
requirements, regular inspection for heritage resource, Grave G1, shall be
audited by the ET at least once every week to ensure recommended mitigation
measures implemented during construction period. The aim of the survey is to
prevent any possible damage to the grave and to ensure the proposed mitigation
measures are implemented. The broad
scope of the audit will involve supervision of the following:
Ÿ
Non-contact effects of
the engineering works, such as vibration from pneumatic drills which could case damage, such as foundation or wall cracks and
loosening of tiles or fixtures; and
Ÿ
Contact between the historic
structures and equipment and materials associated with the engineering works.
6.1.2
Specifically, the
monitoring programme will entail the following tasks:
Ÿ
The extent of the agreed
works areas should be regularly checked during the construction phase to ensure
the buffer is being maintained; and
Ÿ
Ensure no stockpiling or
equipment storage is affecting the structure.
6.1.3
In the event of non-compliance
the responsibilities of the relevant parties is detailed in the Event/ Action Plan
in Appendix
F.
6.2.1
In the Reporting Period,
site inspection for the Grave G1 was undertaken on 2nd, 9th, 17th,
23rd and 30th December 2014. During
site inspection, buffer zone was observed between the working area
and the Grave and no construction material or equipment was stored nearby the
Grave.
6.2.2
Mitigation measures
undertaken by the Contractor has fully implemented the EM&A Manual requirements.
7.1.1
According to EM&A
Manual requirements, monitoring of Contractor’s operations during construction
period to report on Contractor’s compliance should be carried out on weekly
basis. Measure to mitigate landscape and visual
impact during construction should be checked and monitored by a Registered
Landscape Architect to ensure compliance with the intended aims of the
mitigation measures. Moreover, the progress
of the engineering works shall be regularly reviewed on site to identify the
earliest practical opportunities for the landscape works to be undertaken.
7.2.1
In the Reporting Period,
site inspection for landscape and visual mitigation measures was undertaken on 5th, 12th, 19th
and 24th December 2014 by the Registered Landscape Architect. During the site inspection, all the
existing trees were properly protected and kept away from construction
works. Sand bags were erected at
sensitive areas to ensure no runoff into water body. Most of the landscape works such as planting
was not yet commenced. The detailed
inspection checklists were provided in Appendix K.
8.1.1
During EIA study,
landfill gas hazards are likely to be generated
from the Pillar Point Valley (PPV) Landfill. Hence, regular landfill
gas monitoring is recommended during construction of the proposed toll plaza.
8.1.2
During construction, a
Safety Officer should be appointed to carry out the monitoring works. The
monitoring frequency and areas to be monitored should be set down prior to
commencement of ground-works either by the Safety Officer or an approved and appropriated
qualified person. The routine monitoring should be carried out in all excavations,
manholes, chambers, relocation of monitoring wells and any other confined
spaces that may have been created. All
measurements in excavations should be made with the extended monitoring tube
located not more than 10 mm from the exposed ground surface. Monitoring should
be performed properly to make sure that the area is free of landfill gas before
any man enters in the area.
8.1.3
For excavations deeper
than 1m, measurements should be carried out:
Ÿ
at the ground surface
before excavation commences;
Ÿ
immediately before any
worker enters the excavation;
Ÿ
at the beginning of each
working day for the entire period the excavation remains open; and
Ÿ
periodically through the working day
whilst workers are in the excavation.
8.1.4
For excavations between
300mm and 1m deep, measurements should be carried out:
Ÿ
directly after the
excavation has been completed; and
Ÿ
periodically whilst the
excavation remains open
8.1.5
For excavations less
than 300mm deep, monitoring may be omitted, at the discretion of the Safety
Officer (SO) or other appropriately qualified person.
8.1.6
To ensure the accuracy
of the monitoring data, zeroing of the gas analyser
shall be undertaken at the start of each day’s monitoring. As advised by the SO, the gas analyser would be optimally calibrated by the self-test
function to provide the most accurate result. The gas analyser
is calibrated and certified by a laboratory accredited under HOKLAS or any
other international accreditation scheme at yearly basis.
8.2.1
In the Reporting Period, landfill gas monitoring was conducted at the
construction of Retaining Wall B and
Retaining Wall F and the locations are illustrated in Appendix E. A BIOGAS 5000 gas analysis was used for the landfill
gas monitoring and the valid calibration certificate is presented in Appendix H.
8.2.2
There were a total of 25 days monitoring were carried by the Safety Officer or an approved and
qualified persons. The landfill gas measurement results is summarized in Table 8-1. Moreover, database
of monitoring result and graphical plot are attached in Appendix I.
Table 8-1 Summary of Landfill
Gas Measurement Results
|
Landfill Gas Parameter
|
Action Level
|
Limit Level
|
Detectable
at Retaining Wall B
|
Detectable
at Retaining Wall F
|
|
Min
|
Max
|
Min
|
Max
|
|
Methane
|
>10% LEL (>0.5% v/v)
|
>20% LEL (>1% v/v)
|
0%
|
0%
|
0%
|
0%
|
|
Oxygen
|
<19%
|
<18%
|
21.0%
|
21.3%
|
21.0%
|
21.3%
|
|
Carbon Dioxide
|
>0.5%
|
>1.5%
|
0.0%
|
0.3%
|
0.0%
|
0.2%
|
8.2.3
The measurement results
shown that no methane was detected and oxygen concentration measured was over
21% and Carbon Dioxide was between 0.0 and 0.3 %. No corrective action was required
accordingly.
9.1.1
Waste management was carried out by an
on-site Environmental Officer or an Environmental Supervisor from time to time.
The effective management of waste arising during the construction phase will be
monitored through the site audit programme. The aims of the waste audit are:
l to ensure
the waste arising from the works are handled, stored, collected, transferred
and disposed of in an environmentally acceptable manner; and
l to encourage the reuse and recycling of material.
9.1.2
In addition to the site inspections, the ET
shall review the documentation procedures prepared by the Waste Coordinator
once a week to ensure proper records are being maintained and procedures
undertaken in accordance with the Waste Management Plan.
9.2.1
All types of waste arising from the
construction work are classified into the following:
l Construction
& Demolition (C&D) Material;
l Chemical
Waste;
l General
Refuse; and
l Excavated
Soil.
9.2.2
The quantities of wastes generated under the
Contract in this Reporting Period are summarized in Tables 9-1 and 9-2 and
the
Monthly Summary Waste Flow Table is shown in Appendix L. Whenever possible, materials were reused
on-site as far as practicable.
Table 9-1 Summary of
Quantities of Inert C&D Materials
|
Type of Waste
|
Quantity
|
Disposal Location
|
|
Reused in this
Contract (Inert) (`000m3)
|
10.145
|
-
|
|
Reused in other
Projects (Inert) (`000m3)
|
16.525
|
HY/2012/08
|
|
Disposal as Public
Fill (Inert) (`000m3)
|
14.954
|
Tuen Mum Area 38
|
Table 9-2 Summary
of Quantities of C&D Wastes
|
Type of Waste
|
Quantity
|
Disposal Location
|
|
|
0
|
-
|
|
Recycled
Paper / Cardboard Packing (`000kg)
|
0
|
-
|
|
Recycled
Plastic (`000kg)
|
0
|
-
|
|
Chemical
Wastes (`000kg)
|
0
|
-
|
|
General
Refuses (`000m3)
|
0.022
|
WENT
|
10.1.1
According to the approved EM&A Manual,
the environmental site inspection shall be formulated by ET Leader on weekly
basis to confirm the environmental performance of the construction site.
Findings / Deficiencies During
Reporting Period
10.1.2
In the Reporting Period, joint site
inspections to evaluate site environmental performance were carried out by the RE, ET and the
Contractor on 2nd, 9th, 17th, 23rd and 30th
December 2014. No non-compliance was
noted but eleven (11) observations
and five (5) reminders were recorded during site inspections. Moreover, IEC or ENPO has attended joint
site inspection on 30 December 2014.
10.1.3
The findings / deficiencies observed during
the weekly site inspection in the Reporting Period are listed in Table
10-1.
Table 10-1 Site
Observations for the Contract
|
Date
|
Findings
/ Deficiencies
|
Follow-Up
Status
|
|
2 Dec 2014
|
Ÿ
Oil drums without drip tray was observed. The contractor was reminded to
provide drip tray underneath.
|
Ÿ Oil drums were removed before site
inspection on 9 December 2014.
|
|
|
Ÿ The panels of the compressor did not close well during operation. To
reduce noise impact, the contractor was reminded to close panels when the
compressor operation.
|
Ÿ The deficiency has been immediate followed after site inspection.
|
|
|
Ÿ
As a
reminder, housekeeping should be improved near the nepenthes protection zone
to maintain the protection zone or nearby area clean and tidy
|
Ÿ Not required for reminder.
|
|
9 Dec 2014
|
Ÿ Stagnant water cumulated inside
the drip tray was observed. The contractoris reminded to clean-up to prevent mosquito breeding on site.
|
Ÿ
The
deficiency has been rectified before site inspection on 17 December
2014.
|
|
|
Ÿ C&D waste cumulated on site
was observed. The contractor was reminded to clearn more frequency to
maintain the site clean and tidy.
|
Ÿ Construction and dismantling
waste materials were removed before site inspection on 17 December 2014.
|
|
|
Ÿ
Paint oils and solvent without drip tray was observed. The contractor
was reminded to provide drip tray to prevent land contamination.
|
Ÿ
Paint oils and solvent of the chemical materials were removed.
The deficiency has been rectified on 17 December 2014 before site inspection.
|
|
|
Ÿ
As a
reminder, dust mitigation measure should be provided at the stockpile storage
area to minimize dust generation.
|
Ÿ Not required for reminder.
|
|
17 Dec 2014
|
Ÿ
Dusty haul road was observed, the contractor was reminded increase the
water spraying frequency to minimize dust generation.
|
Ÿ
During site inspection on 23 December 2014, water spray was observed to on
the haul road.
|
|
Ÿ C&D waste cumulated on site
was observed. The contractor was reminded to clearn more frequency to
maintain the site clean and tidy.
|
Ÿ Construction and dismantling
waste materials were removed before site inspection on 23 December 2014.
|
|
Ÿ
As a
reminder, dust mitigation measure should be applied during rock breaking or
excavating works to reduce dust generation
|
Ÿ Not required for reminder.
|
|
|
Ÿ As a reminder, the contractor should follow the
VEP requirement for the nepenthes
nursery area.
|
Ÿ Not required for reminder.
|
|
23 Dec 2014
|
Ÿ Dust emitted from rock drilling
works near Lun Mun Road was observed. The contractor was reminded to provide
water spraying minimize dust generation.
|
Ÿ No drilling works and dust emission was
observed.
|
|
|
Ÿ
The felled tree and debris cumulated on site was observed. The
contractor was reminded increase disposal frequency.
|
Ÿ Felled trees and debris were cleared.
|
|
|
Ÿ Debris was observed to cumulate
inside the u-channel. The contractor was reminded to clean-up to maintain the
site drainage system.
|
Ÿ Debris cumulated inside the u-channel was
cleared.
|
|
30 Dec 2014
|
Ÿ Waste skips of general refuse disposal was
filled, the contractor was reminded to clean-up
in accordance with WMP requirements.
|
Ÿ To be followed.
|
|
|
Ÿ As a reminder,
during the dry season, the contractor was reminded to implement water
spraying for drilling / breaking / excavating activities to reduce dust
generation.
|
Ÿ Not required for reminder.
|
10.1.4
The deficiencies in previous Reporting Period
have not yet rectified and they are listed in Table 10-2.
Table 10-2 Outstanding
Items in Site Inspection of previous Reporting Period
|
Date
|
Findings
/ Deficiencies
|
Follow-Up
Status
|
|
11 Nov 2014
|
Ÿ
Residual sand, mud and stagnant
were observed retained on haul road behind the wheel washing bay. The
Contractor should cleaned up the wheel washing bay regularly to make sure its
effective.
|
Ÿ
The
deficiency still not yet settled. The issue will be followed up again in next
reporting period.
|
10.1.5
During
dry and windy
season, air quality mitigation measures such as watering of site area for 12
times per day and covering of exposed slopes should be implemented to reduce
construction dust impact as recommended in the EMEMIS.
10.1.6
For waste management, good practice for daily
housekeeping is reminded. Furthermore, protected fences should be provided for all
retained trees and chemical waste storage area should be set-up for all
chemical waste disposes on site.
11.1.1
In the Reporting Period, no environmental complaint,
summons and prosecution was received For the Contract. However, there were 2 exceedances of the
environmental performance limit (Action and Limit Level) recoded for air
quality monitoring. The statistical
summary table of environmental exceedance, complaint, summons and prosecution are
presented in Tables 11-1, 11-2, 11-3 and 11-4.
Table 11-1 Statistical Summary of
Environmental Exceedance
|
Reporting Period
|
Environmental Aspect / Parameter
|
Environmental Performance
|
Event
Exceedance
|
|
Reporting
Month
|
Previous
Months
|
Cumulative
|
|
December 2014
|
Air Quality - 1-hr TSP
|
Action Level
|
2
|
2
|
4
|
|
Limit Level
|
0
|
0
|
0
|
|
Air Quality - 24-hr TSP
|
Action Level
|
0
|
0
|
0
|
|
Limit Level
|
0
|
0
|
0
|
Table 11-2 Statistical Summary of
Environmental Complaints
|
Reporting Period
|
Environmental
Complaint Statistics
|
|
Frequency
|
Cumulative
|
Complaint Nature
|
|
Air
|
Noise
|
Water
|
|
December 2014
|
0
|
0
|
NA
|
NA
|
NA
|
Table 11-3 Statistical Summary of Environmental
Summons
|
Reporting Period
|
Environmental
Summons Statistics
|
|
Frequency
|
Cumulative
|
Complaint Nature
|
|
Air
|
Noise
|
Water
|
|
December 2014
|
0
|
0
|
NA
|
NA
|
NA
|
Table 11-4 Statistical Summary of
Environmental Prosecution
|
Reporting Period
|
Environmental Prosecution
Statistics
|
|
Frequency
|
Cumulative
|
Complaint Nature
|
|
Air
|
Noise
|
Water
|
|
December 2014
|
0
|
0
|
NA
|
NA
|
NA
|
11.1.2
In the Reporting Period, a warning letter was issued from EPD on 2 December 2014 regarding uncovered
dump trucks.
12.1.1
The environmental mitigation measures that
recommended in the Environmental Mitigation and Enhancement Measures Implementation
Schedule (EMIS) for in the Project EM&A Manual covered the issues of air quality, cultural heritage, ecology, landfill gas hazard, landscape & visual, noise,
water and waste. The updated
ISEMM for the Contract is shown in Appendix M.
12.1.2
The Contractor shall implement the required
environmental mitigation measures according to the EM&A Manual as subject
to the site condition. The environmental mitigation measures implemented by the
Contract in this Reporting Period are summarized in Table 12-1 and Appendix
M.
Table 12-1 Environmental
Mitigation Measures
|
Issues
|
Environmental Mitigation Measures
|
|
Air Quality
|
· Maintain damp / wet surface
on access road
· Keep slow speed in the sites
· All vehicles must use wheel
washing facility before off site
· Sprayed water during rock breaking
works
· During transportation by truck, materials loaded lower
than the side and tail boards, and covered before transport
· Compacted all soil stockpiles
· Part of the exposed slopes covered geotextile net
|
|
Cultural Heritage
|
· Set a buffer zone between the working area
and the Grave
· All construction materials and equipment store far from
the Grave
· Inspection the Grave to ensure provision mitigation
measures effective
|
|
Ecology
|
·
Wire fencing provided for
temporary protect Pitcher Plants
·
Undertake weekly
inspection of Pitcher Plants
|
|
Landfill Gas Hazard
|
·
Landfill Gas
measurement undertake during trench excavation
|
|
Water Quality
|
· Temporary drainage system
provide for surface runoff prevent discharge to public area
· Wastewater to be treated by
sedimentation tank before discharge.
|
|
Noise
|
· Restrain operation time of
plants from 07:00 to 19:00 on any working day except for Public Holiday and
Sunday.
· Keep good maintenance of
plants
· The noisy plants or works provide
mobile noise barriers
· Shut down the plants when
not in used
|
|
Waste and Chemical
Management
|
· On-site sorting prior to
disposal
· Follow requirements and
procedures of the “Trip-ticket System”
·
Predict required quantity of concrete accurately
· Collect the unused fresh concrete at designated
locations in the sites for subsequent disposal
|
|
General
|
· The site was generally kept
tidy and clean.
|
12.2.1
Construction activities as undertaken in the
coming month for the Contract lists below:
Ÿ
Construction of haul roads to Slope A, B, C, D
& E
Ÿ
Excavation to Slope A, B, C, D & E
Ÿ
Slope stabilization works
Ÿ
Surface drainage
Ÿ
Ground Investigation Works
Ÿ
Site clearance
Ÿ
Retaining Wall B & F
Ÿ
Piling Works (Bridge TD1, Bridge G2,Bridge H1&
Footbridge)
Ÿ
Tree felling
Ÿ
Construction of Culvert 1
Ÿ
Pad footing construction for Bridge G2, Bridge H1&G1
Ÿ
Construction of east portal for underpass
Ÿ
Natural terrain hazard mitigation measures and
flexible barriers installation
12.3.1
Key environmental issues to be considered in
the coming month include:
Ÿ
Implementation of dust
suppression measures at all times;
Ÿ
Potential wastewater
quality impact due to surface runoff;
Ÿ
Potential fugitive
dust quality impact due from the dry/loose/exposure soil surface/dusty
material;
Ÿ
Ensure dust suppression measures are implemented
properly;
Ÿ
Sediment catch-pits and silt removal
facilities should be regularly maintained;
Ÿ
Management of chemical wastes;
Ÿ
Site effluent discharge to the nearby nullah is
prohibited;
Ÿ
Follow-up of improvement on general waste
management issues; and
Ÿ
Implementation of construction noise
preventative control measures
13.1.1
This is 2nd
monthly EM&A report presenting the monitoring results and inspection
findings for the period of 1 to 31 December 2014.
13.1.2
No exceedances of 24-hour TSP monitoring were
recorded in the Reporting Period. However,
a total of two (2) Action Level exceedances of 1-hour TSP measurements were triggered
in ASR5 and AQMS1 on 2 and 17 December 2014
respectively. NOE was issued by the ET of HY/2012/08 to notify all relevant parties. Based on investigation finding, the
exceedances were unlikely related with the works under the Contract. The Contractor was reminded to fully
implement the dust control measures.
13.1.3
In the Reporting Period, no noise complaint was received by RE, the Contractor, ENPO or HyD. No Action Level exceedances were therefore triggered and no
NOE or the associated corrective actions were
therefore issued.
13.1.4
Site inspection for landscape and visual was conducted
on weekly basis by the Landscape Architect to ensure if the existing condition
compliance with the intended aims of the mitigation measures. During the site inspection, all the
existing trees were properly protected and kept away from construction
works. Sand bags were erected at
sensitive areas to ensure no runoff into water body. Most of the landscape works such as
planting was not yet commenced.
13.1.5
280 numbers of Pitcher Plant
individuals
located at Zones 1 to 7 were transplanted to the nursery
site on 17th December 2014 by the accredited person and his
assistant. The transplantation work was strictly followed to conditions on
permission. The transplanted Pitcher Plant in nursery site was protected by the
scaffold structure which surrounded by chain link fencing. The condition of the transplanted
pitcher plant was normal.
13.1.6
Landfill gas monitoring was conducted at the
construction of Retaining Wall B and Retaining Wall F by the Safety Officer. The monitoring results shown no
exceedances were triggered.
13.1.7
No documented a complaint, notification of
summons or successful prosecution is received by the Contract. However, a warning
letter was issued by the EPD on 2 December 2014 regarding to uncovered dump
trucks incident.
13.1.8
Joint site
inspection by the RE, ET and CRBC-Kaden JV was carried out on 2nd,
9th, 17th, 23rd and 30th December
2014. Moreover,
IEC or ENPO attended joint site inspection on 30 December 2014. No
non-compliance was recorded during the site inspection but eleven (11) observations
and five (5) reminders were recorded during site inspections.
13.1.9
In the Reporting Period,
chain link fence for protection of Pitcher Plant has been provided for Zone 1
to 10 as the temporary protection before transplantation of Pitcher Plant and
the nursery site for the transplanted Pitcher Plant. During each occasion of site inspection,
no construction activities were found to be conducted nearby the protected
areas of Pitcher Plants and the growth of Pitcher Plants were normal condition.
13.1.10
For cultural heritage,
the buffer zone between the working area
and the Grave was observed and no construction material or equipment was stored
nearby.
13.1.11
No joint site inspection was undertaken with
any external parties i.e. EPD and AFCD in this Reporting Period.
13.2.1
During dry season, special attention should
be paid on the potential construction dust impact. The Contractor should fully implement
the construction dust mitigation measures such as watering of site area for 12 times per day and
covering of exposed slopes should be provided to reduce construction dust
impact as recommended in the EMEMIS.
13.2.2
Water quality mitigation measures such as prevention of muddy water and
other water quality pollutants via site
surface water runoff get into public area should be avoided.
13.2.3
It was reminded
that good housekeeping practice should be maintained. Mosquito control measures should be properly
implemented to prevent mosquito breeding on site.
