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AUES Job No.: TCS00715/14 |
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Tuen Mun - Chek
Lap Kok Link Contract No. HY/2013/12 ¡V Northern Connection Toll Plaza and Associated Works |
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4th Monthly Environmental
Monitoring and Audit (EM&A) Report ¡V February 2015 |
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Prepared
For CRBC
and Kaden Joint Venture |
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Date |
Reference No. |
Prepared By |
Certified By |
10 March 2015 |
TCS00715/14/600/R0070v2 |
Nicola Hon (Environmental Consultant) |
T.W. Tam (Environmental Team Leader) |
EXECUTIVE
SUMMARY
ES01
The construction phase of Contract HY/2013/12 was commenced
on 23 October 2014. This is the 4th Monthly EM&A Report presenting the monitoring
results and inspection findings for the period from 1 to 28 February 2015
(hereinafter ¡¥the Reporting Period¡¦).
Summary of EM&A activities for the Reporting Period
ES02
The EM&A activities
conducted in the Reporting Period are summary in below:-
24-hours TSP of Air Quality
Monitoring ¡V 40 events
1-hour TSP of Air Quality
Monitoring ¡V 120 events
Cultural heritage Inspection
¡V 4 events
Landfill Gas Monitoring ¡V 20 days
Landscape & Visual Monitoring ¡V 4 events
Environmental Site Inspection
¡V 4 events
Breach
of Action and Limit (A/L) Levels
ES03
In the
Reporting Period, no exceedances of 1-hour and 24-hour TSP were recorded
according to the measurement results by the ET of Contract HY/2012/08. The summary of breach of air quality performance
is shown below.
Environmental
Aspect |
Monitoring Parameters |
Action Level |
Limit Level |
Event & Action |
||
NOE Issued |
Investigation |
Corrective Actions |
||||
Air Quality |
1-hour TSP |
0 |
0 |
0 |
0 |
0 |
24-hour TSP |
0 |
0 |
0 |
0 |
0 |
ES04
No noise complaints were received in the
Reporting Period.
ES05
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.
ES06
Site inspection for landscape and visual was conducted
on weekly basis by the Landscape Architect to ensure if the condition
compliance with the intended aims of the mitigation measures. Most of the landscape works such as
planting was not yet commenced.
ES07
In the Reporting
Period, joint site inspection by the
RE, ET and the Contractor was carried out on
3rd, 10th, 17th and 24th February
2015 and the IEC has attended the joint site
inspection on 24th February 2015. No non-compliance was observed
during the site inspection.
ES08
Inspection for Pitcher
Plants of ecology and grave of culture heritage
were also carried out during the weekly site inspection.
Environmental
Complaint
ES09 No environmental
complaints were received in the Reporting Period. The statistical summary of environmental
complaints is summarized in the following table.
Reporting Period |
Environmental
Complaint Statistics |
|
Frequency |
Cumulative |
|
Since project commencement |
0 |
0 |
January 2015 |
0 |
0 |
Notification of Summons and Successful Prosecutions
ES10
No environmental summons or successful
prosecutions were recorded in the Reporting Period.
ES11
No reporting changes were made in the
Reporting Period.
Table
of Contents
1 Introduction 1
1.1 Contract Background 1
1.2 Report Structure 1
2 Contract Organization and Construction progress and Environmental Submissions 2
2.1 Contract Organization 2
2.2 Construction Progress 2
2.3 Summary of Environmental Submissions 2
3 Summary of Impact Monitoring Requirements Under the Contract 3
3.1 General 3
3.2 Air Quality Monitoring 3
3.3 Monitoring Location 3
3.4 Monitoring Frequency 3
3.5 Monitoring Equipment 4
3.6 Derivation of Action/Limit (A/L) Levels 5
3.7 Other Environmental Aspects 5
3.8 Monitoring Schedule 6
4 Air Quality Monitoring 7
4.1 General 7
4.2 Air Quality Monitoring Results in Reporting
Period 7
4.3 Action and Limit (A/L) Levels Exceedance 7
4.4 Air Quality Exceedance Investigation 7
5 Ecology Monitoring 8
5.1 General 8
5.2 Pitcher Plants Inspection 8
6 CULTURAL HERITAGE 9
6.1 General 9
6.2 Grave Inspection 9
7 Landscpae and Visual 10
7.1 General 10
7.2 Landscape and Visual Inspection 10
8 Landfill Gas Hazard Monitoring 11
8.1 General 11
8.2 Landfill Gas Monitoring Result 11
9 Waste Management 13
9.1 General Waste Management 13
9.2 Records of Waste Quantities 13
10 Inspection
and Audit 14
10.1 Site Inspection 14
11 Environmental
Complaint and Non-compliance 16
11.1 Environmental Complaint, Summons and
Prosecution 16
12 Implementation
Status of Mitigation Measures 17
12.1 General Requirements 17
12.2 Tentative Construction Activities in the Coming
Month 17
12.3 Key Environmental Issues for the Coming Month 18
13 Conclusions
and Recommendations 19
13.1 Conclusions 19
13.2 Recommendations 19
List
of TABLES
Table
2-1 Status
of Environmental Licenses and Permits of the Contract
Table
3-1 Air
Quality Monitoring Stations under the Contract
Table
3-2 Enhanced
TSP Monitoring Plan ¡V Construction Phase
Table
3-3 Action
and Limit Levels for Impact Air Quality Monitoring
Table
4-1 Summary
of Air Quality Monitoring Exceedance
Table
8-1 Summary
of Landfill Gas Measurement Results
Table
9-1 Summary
of Quantities of Inert C&D Materials
Table
9-2 Summary
of Quantities of C&D Wastes
Table
10-1 Site
Observations for the Contract
Table
10-2 Outstanding
Items in Site Inspection of previous Reporting Period
Table
11-1 Statistical
Summary of Environmental Exceedance
Table
11-2 Statistical
Summary of Environmental Complaints
Table
11-3 Statistical
Summary of Environmental Summons
Table
11-4 Statistical
Summary of Environmental Prosecution
Table
12-1 Environmental
Mitigation Measures
List of Appendices
Appendix A Project
Layout Plan
Appendix B Layout Plan of the Contract
Appendix C Organization
of the Contract
Appendix D Master Construction
Program and three Months roll Program
Appendix E Monitoring
Locations for the Contract
Appendix F Event
and Action Plan
Appendix G Monitoring
Schedule
Appendix H Calibration
Certificates of Monitoring Equipment
Appendix I Landfill
Gas Monitoring Results and Graphical Plots
Appendix J Investigation
Report for Exceedance
Appendix K Checklist for Landscape and Visual
Monitoring
Appendix L Monthly
Summary Waste Flow Table
Appendix M Environmental Mitigation and Enhancement
Measures Implementation Schedule (EMIS)
Appendix N Cumulative Statistics on Exceedance and
Complaint
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 ¡V Northern Connection Toll Plaza and
Tunnel Section ((hereafter ¡§the Contract¡¨) and this Contract is part of the Tuen Mun ¡V 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 4th
monthly EM&A report presenting the monitoring results and inspection
findings for period from 1 to 28 February 2015.
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 and Environmental Submissions
Section 3 Summary of Impact
Monitoring Requirements under the Contract
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 Inspections and Audit
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.
Bridge Work ¡V Portion X
Site Formation ¡V Portion X
Underpass ¡V Portion X
Retaining Wall Structure TP_F & RW_B ¡V Portion
X
Footbridge FB1 ¡V Portion X
Ground Investigation Works ¡V Various Locations
Site Clearance ¡V Various Locations
Tree Felling ¡V Various Locations
2.3.1
The environmental submissions under the EP
requirement had been submitted to the EPD and they are listed in below:
Monitoring Plan on Construction Dust
(submission refer to Contract HY/2012/08)
Landscape and Visual Plan (not yet endorsed by EPD)
Waste Management Plan (not yet endorsed by EPD)
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
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 |
Permission
to Transplant Pitcher Plant |
02-12-2014 |
(7) in AF CON 11/13 pt.4 |
09-12-2014 |
08-06-2015 |
6 |
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 aspects 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 ¡V
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 (£gg/m3) |
1-hour TSP (£gg/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.
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 and 24-hour
TSP monitoring at the five proposed locations are continued to perform by the
ET of Contract HY/2012/08. Therefore,
no air quality monitoring was conducted by the ET of Contract HY/2013/12. Details information of air quality
monitoring results refer to the Monthly EM&A
Reports of the Contract HY /2012 /08 (February 2015).
4.3.1
According to the air quality monitoring
result provided by Contract HY/2012/08, no exceedances in 1-hour and 24-hour
TSP were recorded in the Reporting Period.
No Notification on Exceedances (NOEs) was issued by the ET of Contract
HY/2012/08. 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 |
NA |
NA |
NA |
-- |
-- |
4.4.1
No investigation for
exceedance is required for the Reporting Period.
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 protection measure of the Pitcher Plants during construction period.
5.2.1
In the Reporting Period,
inspections for implementation status of mitigation measures for the Pitcher
Plants were carried out by the ET on 3rd, 10th, 17th
and 24th February 2015.
5.2.2
During weekly site
inspection, the transplanted Pitcher Plants at the nursery
zone
were overall in fair condition. It was
observed that the Pitcher Plants were protected properly and no repair or
maintenance is required for the scaffold structure and chain link fence. Moreover, no construction
activities were conducted nearby the nursery zone.
5.2.3
Random checking was
undertaken for the protected areas Zones 8, 9 and 10 during weekly site
inspection. It was observed
that the Pitcher Plants were protected properly and no construction activities were
carried out nearby the protected areas of Pitcher Plants. The condition of chain link fence is
good and no repair or maintenance is required. The growths of Pitcher Plants as retained at the
protected areas were in 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:
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
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:
The extent of the agreed
works areas should be regularly checked during the construction phase to ensure
the buffer is being maintained; and
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 3rd, 10th,
17th and 24th February 2015. During
site inspection, buffer zone between the working area and the Grave was maintained 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
accordingly.
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 6th, 13th,
17th and 27th February 2015 by the Registered Landscape Architect.
7.2.2
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:
at the ground surface
before excavation commences;
immediately before any
worker enters the excavation;
at the beginning of each
working day for the entire period the excavation remains open; and
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:
directly after the
excavation has been completed; and
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 20 days monitoring were carried by the Safety Officer or an
approved and qualified persons. The results of landfill gas measurement are
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% |
0.2% |
0% |
0.2% |
Oxygen |
<19% |
<18% |
21.0% |
21.2% |
21.0% |
21.2% |
Carbon Dioxide |
>0.5% |
>1.5% |
0% |
0.2% |
0% |
0.2% |
8.2.3
The measurement results shown that slightly methane
concentration was detected and oxygen concentration measured was over 21.0% and
Carbon Dioxide was between 0 and 0.2 %.
No exceedance was triggered and therefore 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) |
24.411 |
- |
Reused in other Projects (Inert) (`000m3) |
25.313 |
HY/2012/08 |
Disposal as Public Fill (Inert) (`000m3) |
0.629 |
Tuen Mum Area 38 |
Table 9-2 Summary of
Quantities of C&D Wastes
Type of Waste |
Quantity |
Disposal Location |
Recycled Metal (`000kg) |
0 |
- |
Recycled Paper / Cardboard Packing (`000kg) |
0 |
- |
Recycled Plastic (`000kg) |
0 |
- |
Chemical Wastes (`000kg) |
0 |
- |
General Refuses (`000m3) |
0.01 |
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 3rd, 10th, 17th
and 24th February
2015. No non-compliance was noted but 4 observations and 6 reminders were recorded
during the four occasions of site inspection. Moreover, ENPO/IEC has attended joint
site inspection on 24 February 2015.
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 |
3 Feb 2015 |
Stockpile without cover was observed. Dust mitigation measures should be
applied to minimize dust generation. |
Stockpile without cover was
removed before site
inspection on 10 February 2015. |
|
General refuse scattered on site was
observed. The contractor was reminded to clean and provide more rubbish bin
on site. |
General refuse scattered on site
has cleared during site inspection on 10 February 2015. |
|
As a reminder, tree protection
zone should be set up for the retained tree on site to prevent cause any
damage due site activities. |
Not required for reminder. |
10 Feb 2015 |
General refuse placing outside
the waste skip was observed. The contractor was reminded all general refuse
should be disposal into proper containers to maintain the site clean and
tidy. |
General refuse as placed outside the waste skip has been properly disposal. |
|
The contractor was reminded that the
sump pit should be regularly cleanup to maintain the drainage system function
properly. |
Not required for reminder. |
|
Mitigation measures for dust and
noise should be implemented for the works area near Lung Mun Road to reduce
public impact. |
Not required for reminder. |
17 Feb 2015 |
Free standing chemical container without drip tray was observed. The contractor was reminded to provide
drip tray underneath. |
The free standing chemical container without drip tray has removed during site inspection on 24
February 2015. |
|
During the dry season, dust mitigation measures should be implementated
to reduce dust impact. |
Not required for reminder. |
24 Feb 2015 |
As a reminder, dust mitigation measures should be implemented for
breaking/excaviting activities to reduce construction dust impact. |
Not required for reminder. |
|
As a reminder, stagnant water cumulated inside
the u-channel or
gully should be drained away to prevent mosquito
breeding. |
Not required for reminder. |
10.1.4
No
outstanding deficiency was remained to be rectified in previous Reporting
Period.
Table 10-2 Outstanding
Items in Site Inspection of previous Reporting Period
Date |
Findings
/ Deficiencies |
Follow-Up
Status |
-- |
NA |
NA |
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 EMIS.
10.1.6
For waste management, good practice for daily
housekeeping is reminded. Furthermore, clean-up frequency of the waste skips
and wastewater treatment system should be increased to ensure these facilities
functional and effective.
11.1.1
In the Reporting Period, no environmental complaint,
summons and prosecution was received For the Contract. Moreover, no exceedance of the
environmental performance limit (Action and Limit Levels) was recorded 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 |
|||
February 2015 |
Air Quality - 1-hr TSP |
Action Level |
0 |
4 |
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 |
|||
February 2015 |
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 |
|||
February 2015 |
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 |
|||
February 2015 |
0 |
0 |
NA |
NA |
NA |
11.1.2
In the Reporting Period, no warning letter related to environmental issue was received from the EPD
or CEDD.
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
EMIS 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 |
¡P Maintain damp / wet surface
on access road ¡P Keep slow speed in the sites ¡P All vehicles must use wheel
washing facility before off site ¡P Sprayed water during rock breaking
works ¡P During transportation by truck, materials loaded lower
than the side and tail boards, and covered before transport ¡P Compacted all soil stockpiles ¡P Part of the exposed slopes covered geotextile net |
Cultural Heritage |
¡P Set a buffer zone between the working area
and the Grave ¡P All construction materials and equipment store far from
the Grave ¡P Inspection the Grave to ensure provision mitigation
measures effective |
Ecology |
¡P
Wire fencing provided for
temporary protect Pitcher Plants ¡P
Undertake weekly
inspection of Pitcher Plants |
Landfill Gas Hazard |
¡P
Landfill Gas
measurement undertake during trench excavation |
Water Quality |
¡P Temporary drainage system
provide for surface runoff prevent discharge to public area ¡P Wastewater to be treated by
sedimentation tank before discharge. |
Noise |
¡P Restrain operation time of
plants from 07:00 to 19:00 on any working day except for Public Holiday and
Sunday. ¡P Keep good maintenance of
plants ¡P The noisy plants or works provide
mobile noise barriers ¡P Shut down the plants when
not in used |
Waste and Chemical
Management |
¡P On-site sorting prior to
disposal ¡P Follow requirements and
procedures of the ¡§Trip-ticket System¡¨ ¡P
Predict required quantity of concrete accurately ¡P Collect the unused fresh concrete at designated
locations in the sites for subsequent disposal |
General |
¡P The site was generally kept
tidy and clean. |
12.2.1
Construction activities as undertaken in the
coming month for the Contract lists below:
Site Formation to Slope A, B, C, D, E
Tree Felling
Construction of Culvert 1
Construction of vehicular underpass
Natural terrain hazard mitigation measures and
flexible barriers installation
Retaining Structure RE_B & TP_F
Bridge TD1
Construction of Tunnel Portal
Retaining RW_B
12.3.1
Key environmental issues to be considered in
the coming month include:
Implementation of dust
suppression measures at all times;
Potential wastewater
quality impact due to surface runoff;
Potential fugitive
dust quality impact due from the dry/loose/exposure soil surface/dusty
material;
Ensure dust suppression measures are
implemented properly;
Sediment catch-pits and silt removal
facilities should be regularly maintained;
Management of chemical wastes;
Site effluent discharge to the nearby nullah is
prohibited;
Follow-up of improvement on general waste
management issues; and
Implementation of construction noise
preventative control measures
13.1.1
This is 4th
monthly EM&A report presenting the monitoring results and inspection
findings for the period of 1 to 28 February 2015.
13.1.2
No air quality monitoring including 1-hour
and 24-hour TSP exceedance was recorded in the Reporting Period. Although air quality monitoring result complied with the performance
criteria, 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
required.
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. Most of the landscape works such as
planting was not yet commenced.
13.1.5
Weekly site inspection
and random checking respectively were performed for the transplanted
Pitcher Plants in the nursery site and protected Zones 8 to 10. No repair or maintenance is required the scaffold
structure or chain link fence. Moreover,
no construction activities were conducted nearby
the nursery zone and the protected areas of
Pitcher Plants. The growths of the transplanted pitcher plant and the Pitcher Plants as retained at the
protected areas were in fair and 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.
13.1.8
Joint site
inspection by the RE, ET and Contractor was carried out on 3rd,
10th, 17th and 24th February 2015. Moreover, ENPO/IEC attended joint site inspection on 24 February 2015. No
non-compliance was recorded during the site inspection, 4 observations and 6
reminders were recorded during site inspections.
13.1.9
For cultural heritage,
the buffer zone between the working area
and the Grave was observed and no construction material or equipment was stored
nearby.
13.2.1
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 EMIS.
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.