EXECUTIVE SUMMARY
The
proposed widening of Tolo
Highway and Fanling Highway between Island House
Interchange and Fanling (the Project) is a Designated Project under the
Environmental Impact Assessment Ordinance (Cap. 499) (EIAO) and is governed by an Environmental Permit (EP-324/2008)(EP). The Project aims to widen Tolo Highway
and Fanling Highway
to dual 4-lane carriageway in order to alleviate the current traffic congestion
problems and to cope with the increasing transport demands to and from the
urban areas and also cross boundary traffic.
The
construction works for this Project will be delivered in 2 stages i.e. Stage 1
(between Island House Interchange and Tai Hang) and Stage 2 (between Tai Hang
and Wo Hop Shek Interchange). The construction works of Stage 1 were commenced
on 23 November 2009 and will tentatively be completed in December 2013; while
construction programme of Stage 2 is currently under review. This report
focuses on Stage 1 of the Project only.
The
construction phase of Stage 1 under the EP and the EM&A programme for Stage
1 of the Project commenced on 23 November 2009. The impact environmental
monitoring and audit includes air quality and noise monitoring.
This
report documents the findings of EM&A works conducted in the period between
1 November 2010 and 31 January 2011. As informed by the Contract 1 Contractor
(CSHK), construction activities in the reporting period were:
-
Temporary shoring, sheetpiling
and excavation;
-
Pipe pile wall construction;
-
Pile cap construction;
-
Bridge Construction;
-
Bored piling;
-
Tree felling and transplanting
of trees;
-
Installation of soil nails;
-
Demolition of existing central
dividers;
-
Retaining wall construction;
-
At-grade road construction;
-
Demolition of bridges; and
-
Slope works.
The construction works carried
out by the Contract 2 Contractor (GCL) in the reporting period were:
-
Erection of new fence;
-
Setting up temporary traffic
arrangement;
-
Excavation of trial trenches to
locate existing utilities;
-
Ground investigation and
predrilling;
-
Extension of box culvert and
subway;
-
Construction of haul road;
-
Piling and pile cap of bridges;
-
Construction of Pilecap /
Spread footing of Noise Barrier / Semi Noise Enclosure;
-
Slope works, including
installation of soil nail;
-
Entrusted watermain works;
-
Retaining wall construction;
-
Modification of existing bridge
structure; and
-
Sewer installation.
Environmental Monitoring Works
A summary of
monitoring and audit activities conducted in the reporting quarter is listed
below:
|
24-hour TSP monitoring
|
16 sessions
|
|
1-hour TSP monitoring
|
48 sessions
|
|
Daytime Noise monitoring
|
13 regular
sessions
|
|
Environmental Site inspection
|
14 sessions
(Contract 1) / 13 sessions (Contract 2)
|
Breaches of Action
and Limit Levels for Air Quality
No exceedance of Action and Limit Level was
recorded for both 1-hour and 24-hour TSP monitoring in the reporting period.
Breaches of Action and Limit
Levels for Noise
There
were two (2) noise related complaints followed up by Environmental Team in the
reporting period, but they were related to time period outside the 0700-1900
hours of normal weekdays, hence no Action Level exceedance of noise was
recorded.
No
Limit Level exceedance of construction noise monitoring was recorded in the
reporting quarter.
Complaint, Notification of
Summons and Successful Prosecution
Two (2)
environmental complaints were followed up by Environmental Team in the
reporting quarter.
No
notification of summons and successful prosecution was received in the
reporting quarter.
1
introduction
Background
1.1.
Tolo
Highway and Fanling Highway are expressways in the North East
New Territories
connecting Sha Tin, Tai Po and Fanling. These highways form a vital part of the
strategic Route 9, which links Hong Kong Island to Shenzhen. At present, this
section of Route 9 is dual 3-lane carriageway. However, at several major
interchanges along this section of Route 9, the highway is only dual-2 lane.
Severe congestion is a frequent occurrence during peak periods, particularly in
the Kowloon
bound direction.
1.2.
The objective of the Project “Widening of
Tolo Highway / Fanling Highway
between Island House Interchange and Fanling” is to widen Tolo Highway and Fanling Highway to dual 4-lane
carriageway in order to alleviate the current traffic congestion problems and
to cope with the increasing transport demands to and from the urban areas and
also cross boundary traffic.
1.3.
The Project is a designated project and is
governed by an Environmental Permit (EP-324/2008)(EP).
1.4.
The scope of the Project comprises mainly:
|
(i)
|
Widening
of a 5.7 km section of Tolo Highway and 3.0 km section of Fanling Highway
between Island House Interchange and Wo Hop Shek Interchange from the
existing dual 3-lane to dual 4-lane, including construction of new vehicular
bridges;
|
|
(ii)
|
Widening of interchange
sections at Island House Interchange, Tai Po North Interchange, and Lam Kam
Road Interchange from dual 2-lane to dual 3-lane, except Sha Tin bound
carriageway at Tai Po North Interchange, which is widened from 3-lane to
4-lane, including realignment of various slip roads;
|
|
(iii)
|
Modification
and reconstruction of highways, vehicular bridges, underpasses and
footbridges.
|
1.5.
The construction works for this Project will
be delivered in 2 stages i.e. Stage 1 (between Island House Interchange and Tai
Hang) and Stage 2 (between Tai Hang and Wo Hop Shek Interchange). The
construction works of Stage 1 commenced on 23 November 2009 and will
tentatively be completed in December 2013; while construction programme of
Stage 2 is currently under review. This report focuses on Stage 1 of the
Project only.
1.6.
The construction works for Stage 1 of the
Project will be implemented under 2 works contracts (Contract 1 and Contract
2). Contract 1 covers the section of Tolo Highway
between Island House Interchange and Ma Wo, Contract 2 covers the section of Tolo Highway
between Ma Wo and Tai Hang.
1.7.
Hyder-Arup-Black and Veatch Joint Venture
(HABVJV) are appointed by Highways Department as the consultants for the design
and construction assignment for the Tolo project under Agreement No. CE 58/2000
Supplementary Agreement No. 3 (SA3) (i.e. the Engineer for the Contracts).
1.8.
China State Construction Engineering (Hong
Kong) Ltd. (CSHK) was commissioned as the Contractor of Contract 1 of Stage 1
of the Project, while Gammon Construction Limited (GCL) was commissioned as the
Contractor of Contract 2 of Stage 1 of the Project.
1.9.
AECOM Asia Co. Ltd. was employed by Highways
Department as the Environmental Team to undertake the EM&A works for Stage
1 of the Project and Mott MacDonald Hong Kong Ltd. acts as the Independent
Environmental Checker (IEC) for the Contracts.
1.10.
The construction phase of Stage 1 under the
EP commenced on 23 November 2009.
1.11.
According to the updated EM&A Manual of
Stage 1 of the Project, there is a need of an EM&A programme including air
quality and noise monitoring. The EM&A programme for Stage 1 of the Project
commenced on 23 November 2009.
Scope
of Report
1.12.
This is the fifth Quarterly Environmental
Monitoring and Audit (EM&A) Summary Report under the Agreement No. CE
20/2009 (EP) - Widening of Tolo Highway between Island House Interchange and
Tai Hang – Investigation. This report
presents a summary of the environmental monitoring and audit works, list of
activities and mitigation measures proposed by the ET for Stage 1 of the
Project from 1 November 2010 to 31 January 2011.
Project
Organization
1.13.
The project organization is shown in Appendix
A. The key personnel contact names and numbers are summarized in Table 1.1.
Table 1.1 Contact
Information of Key Personnel
|
Party
|
Position
|
Name
|
Telephone
|
Fax
|
|
ER of Stage 1, Contract 1
(Hyder-Arup-Black
& Veatch Joint Venture)
|
Chief Resident Engineer /TOLO1
|
James
Tsang
|
9038 8797
|
26674000
|
|
ER of Stage 1, Contract 2
(Hyder-Arup-Black
& Veatch Joint Venture)
|
Chief Resident Engineer /TOLO2
|
Paul Appleton
|
9097 5833
|
2653 2348
|
|
IEC of Stage 1
(Mott MacDonald Hong Kong Limited)
|
Independent
Environmental Checker
|
Terence Kong
|
2828 5919
|
2827 1823
|
|
Contractor of Stage 1, Contract 1
(China
State Construction Engineering (Hong Kong) Ltd.)
|
Site
Agent
|
David
Lau
|
9499 0818
|
2667 5666
|
|
Environmental Officer
|
Michael
Tsang
|
9277 4956
|
2667 5666
|
|
Contractor of Stage 1, Contract 2
(Gammon Construction Ltd.)
|
Site
Agent
|
Edmond
Chan
|
9483
8885
|
2559
3410
|
|
Environmental
Officer
|
Ir Thomson Chang
|
9213
6569
|
2559
3410
|
|
ET of Stage 1
(AECOM)
|
ET
Leader
|
Y T
Tang
|
2893 1551
|
2891 0305
|
1.14.
Summary
of Construction Works
1.15.
The
construction phase of Stage 1 under the EP commenced on 23 November 2009.
Details of the construction works carried out by the
Contract 1 Contractor (CSHK) in
this reporting period are listed below:
-
Temporary shoring, sheetpiling
and excavation;
-
Pipe pile wall construction;
-
Pile cap construction;
-
Bridge Construction;
-
Bored piling;
-
Tree felling and transplanting
of trees;
-
Installation of soil nails;
-
Demolition of existing central
dividers;
-
Retaining wall construction;
-
At-grade road construction;
-
Demolition of bridges; and
-
Slope works.
1.16.
The construction works carried out by the
Contract 2 Contractor (GCL) in the reporting period were:
-
Erection of new fence;
-
Setting up temporary traffic
arrangement;
-
Excavation of trial trenches to
locate existing utilities;
-
Ground investigation and
predrilling;
-
Extension of box culvert and
subway;
-
Construction of haul road;
-
Piling and pile cap of bridges;
-
Construction of Pilecap /
Spread footing of Noise Barrier / Semi Noise Enclosure;
-
Slope works, including
installation of soil nail;
-
Entrusted watermain works;
-
Retaining wall construction;
-
Modification of existing bridge
structure; and
-
Sewer installation.
1.17.
The Construction Programmes are shown in
Appendix B.
1.18.
The general layout plan of the Project site
showing the contract areas is shown in Figure 1.1.
1.19.
The mitigation measures implementation
schedule are presented in Appendix C.
2
Environmental
Monitoring and Audit Requirements
Monitoring Parameters
2.
2.1.
The updated EM&A Manual designated 4 air
quality monitoring stations and 7 noise monitoring stations to monitor
environmental impacts on air quality and noise due to Stage 1 of the Project.
2.2.
For air quality, monitoring locations AM2 (Shan
Tong New Village) and AM3 (Riverain Bayside) were set up at the proposed
locations in accordance with updated EM&A Manual. However, for monitoring
locations: Dynasty View and Tai Po Garden, proposed in the updated EM&A
Manual, as approval could not be obtained from the owner’s corporation of the
premises, impact air quality monitoring was conducted at alternative monitoring
locations: AM1 (Ha Wun Yiu) and AM4 (Tai Kwong Secondary School). The
monitoring station at 13 Ha Wun Yiu (AM1) was relocated to Fan Sin Temple, 3
Sheung Wun Yiu (AM1A) in February 2010.
2.3.
For noise, monitoring stations NM3 (Wong Shiu
Chi Middle School), NM6 (PLK Tin Ka Ping Primary School) and NM7 (Riverain
Bayside) were set up at the proposed locations in accordance with updated
EM&A Manual. However, for monitoring locations: Tai Po Garden, Dynasty
View, Hong Kong Teachers’ Association Lee Heng Kwei Secondary School and Grand
Palisades, proposed in the updated EM&A Manual, as approval of access could
not be obtained from the owner’s corporation of the premises or the principal
of the education institutes, impact noise monitoring was conducted at
alternative monitoring locations: NM1 (Tai Kwong Secondary School), NM2 (Ha Wun
Yiu), NM4 (Uptown Plaza) and NM5 (The Paragon).
2.4.
The monitoring locations are depicted in
Figure 2.1.
2.5.
The updated EM&A Manual also required
environmental site inspections for air quality, noise, water quality, chemical,
waste management, ecology and landscape and visual impact.
Environmental Quality Performance Limits
(Action/Limit Levels)
2.1
2.6.
The environmental quality performance limits
(i.e. Action/Limit Levels) of air quality monitoring were derived from the
baseline air quality monitoring results at the respective monitoring stations
(AM1(A), AM2, AM3 and AM4), while the environmental quality performance limits
of noise monitoring were defined in the EM&A Manual.
2.7.
The environmental quality performance limits
of air quality and noise monitoring and are given in Appendix D.
Environmental Mitigation Measures
2.2
2.8.
Relevant environmental mitigation measures
were stipulated in the Particular Specification and EP (EP-324/2008) for
the Contractor to adopt. A list of mitigation measures and their implementation
statuses are given in Appendix C.
3
Air
Quality Monitoring
3.
3.1.
Air quality monitoring, including 1-hour and
24-hour TSP, was conducted at least 3 times every 6 days and at least once
every 6 days respectively at the 4 monitoring stations (AM1A, AM2, AM3 and
AM4), in accordance with the updated EM&A Manual.
3.2.
The weather was either sunny or cloudy in the
reporting quarter. The major dust source of the construction work area included
concrete breaking, soil nail installation and excavation activities from Stage
1 of the Project, as well as nearby traffic emissions.
3.3.
The number of monitoring events and
exceedances recorded in each month of the reporting quarter are presented in
Table 3.1 and Table 3.2 respectively.
Table 3.1 Summary of Number of Monitoring
Events for 1-hr & 24-hr TSP Concentration
|
Monitoring Parameter
|
Location
|
No. of monitoring events
|
|
Nov 10
|
Dec 10
|
Jan 11
|
|
1-hr TSP
|
AM1A
|
15
|
18
|
15
|
|
AM2
|
15
|
18
|
15
|
|
AM3
|
15
|
18
|
15
|
|
AM4
|
15
|
18
|
15
|
|
24-hr TSP
|
AM1A
|
5
|
6
|
5
|
|
AM2
|
5
|
6
|
5
|
|
AM3
|
5
|
6
|
5
|
|
AM4
|
5
|
6
|
5
|
Table 3.2 Summary
of Number of Exceedances for 1-hr & 24-hr TSP Monitoring
|
Monitoring Parameter
|
Location
|
Level of Exceedance
|
Level of Exceedance
|
|
Nov 10
|
Dec 10
|
Jan 11
|
|
1-hr TSP
|
AM1A
|
Action
|
0
|
0
|
0
|
|
Limit
|
0
|
0
|
0
|
|
AM2
|
Action
|
0
|
0
|
0
|
|
Limit
|
0
|
0
|
0
|
|
AM3
|
Action
|
0
|
0
|
0
|
|
Limit
|
0
|
0
|
0
|
|
AM4
|
Action
|
0
|
0
|
0
|
|
Limit
|
0
|
0
|
0
|
|
|
Total
|
0
|
0
|
0
|
|
24-hr TSP
|
AM1A
|
Action
|
0
|
0
|
0
|
|
Limit
|
0
|
0
|
0
|
|
AM2
|
Action
|
0
|
0
|
0
|
|
Limit
|
0
|
0
|
0
|
|
AM3
|
Action
|
0
|
0
|
0
|
|
Limit
|
0
|
0
|
0
|
|
AM4
|
Action
|
0
|
0
|
0
|
|
Limit
|
0
|
0
|
0
|
|
|
Total
|
0
|
0
|
0
|
3.4.
All 1-hour and 24-hour TSP results were below
the Action and Limit Level at all monitoring locations in the reporting
quarter.
3.5.
The graphical plots of the air quality
monitoring results are provided in Appendix E.
4
Construction
Noise MONITORING
4.
4.1.
Construction noise monitoring was conducted
at the 7 monitoring stations (NM1, NM2, NM3, NM4, NM5, NM6 and NM7) for at
least once per week during 07:00 – 19:00 in the reporting quarter.
4.2.
The major noise source during the noise
monitoring included construction activities of Stage 1 of the Project, nearby
traffic noise and general school activities.
4.3.
The number of construction noise monitoring
events and exceedances are summarized in Table 4.1 and Table 4.2
respectively.
Table 4.1 Summary of Number of Monitoring
Events for Construction Noise
|
Monitoring Parameter
|
Location
|
No. of monitoring events
|
|
Nov 10
|
Dec 10
|
Jan 11
|
|
Construction Noise
|
NM1
|
4
|
5
|
4
|
|
NM2
|
4
|
5
|
4
|
|
NM3
|
4
|
5
|
4
|
|
NM4
|
4
|
5
|
4
|
|
NM5
|
4
|
5
|
4
|
|
NM6
|
4
|
5
|
4
|
|
NM7
|
4
|
5
|
4
|
Table 4.2 Summary of Number of Monitoring
Exceedances for Construction Noise
|
Monitoring Parameter
|
Location
|
Level of Exceedance
|
Level of Exceedance
|
|
Nov 10
|
Dec 10
|
Jan 11
|
|
Construction Noise
|
NM1
|
Limit
|
0
|
0
|
0
|
|
NM2
|
0
|
0
|
0
|
|
NM3
|
0
|
0
|
0
|
|
NM4
|
0
|
0
|
0
|
|
NM5
|
0
|
0
|
0
|
|
NM6
|
0
|
0
|
0
|
|
NM7
|
0
|
0
|
0
|
|
|
Total
|
0
|
0
|
0
|
4.4.
All measured construction noise levels were
below the Limit level and the graphical plots of the trends of the monitoring
results are provided in Appendix F.
4.5.
There were two (2) noise related complaints
followed up by Environmental Team in the reporting period, but they were
related to time period outside the 0700-1900 hours of normal weekdays, hence no
Action Level exceedance of noise was recorded.
4.6.
The details of the noise related complaints
are described in Section 8 of this report.
5
ENVIRONMENTAL
SITE INSPECTION AND AUDIT
5.
5.1.
Site Inspections were carried out on a weekly
basis to monitor the implementation of proper environmental pollution control
and mitigation measures for Stage 1 of the Project. In the reporting quarter,
14 and 13 site inspections were carried out for Contract 1 and Contract 2 of the Project respectively.
5.2.
Particular observations during the site inspections for Contract 1 are
described below:
Air Quality
5.1.1
Cement powder was observed on the ground at Wall 4-7. The Contractor
was reminded to clear the cement powder.
5.1.2
The stock of cement bags near the vehicle site entrance of
Wall 8 was not covered. The Contractor was reminded to cover the stock of
cement bags with tarpaulin sheets.
5.1.3
Several stockpiles of dusty material were not covered at
Slope 13. The Contractor was reminded to properly cover the stockpiles to
prevent fugitive dust generation.
Noise
5.1.4
An air compressor at bridge level of Wall 8 was not fitted
with noise emission label. The Contractor was reminded to fit proper noise
emission label at obvious location on the air compressor.
Water Quality
5.1.5
Bunding was missing on the temporary bridge at Bridge 11A.
The Contractor was reminded to provide bunding at both sides of the bridge.
5.1.6
Stagnant water was observed inside a pile cap at Wall 8.
The Contractor was reminded to clear the stagnant water.
5.1.7
General refuse and C&D materials were observed inside
the u-channel at TP7. The Contractor was reminded to remove the general refuse
and C&D materials from the u-channel and properly maintain the drainage
system on-site.
Chemical and Waste Management
5.1.8
Oil stains were observed near the drip tray of chemical
containers at bridge level of Wall 8. While no leakage from the tray or
chemical containers was observed, the Contractor was reminded to properly
handle the chemicals and to clean up the oil stains.
5.1.9
Non-inert C&D waste was accumulated at Bridge 10A. The
Contractor was reminded to clear the C&D waste in a timely manner.
Landscape and Visual Impact
5.1.10
C&D materials were placed very close to the retained
trees at Retaining Wall 10. The Contractor was reminded to keep all
construction materials away from the retained trees.
5.1.11
Ropes were tied on some retained trees and, in particular,
a nail was found nailed into the tree branch to hang electric wires at Bridge
11A. The Contractor was requested to untie the ropes, pull out the nail and not
to hang wires onto the retained trees in the future.
Particular observations during
the site inspections for Contract 2 are described below:
Air Quality
5.1.12
Fugitive dust was observed when dump trucks passed through
the haul road at Area B. The Contractor was reminded to provide dust
suppression measures at the Area.
5.1.13
Two stockpiles were not covered underneath Lam Kam Flyover.
The Contractor was reminded to cover the stockpiles with impervious sheets.
5.1.14
Dusty material was observed on the ground at Area C. The
Contractor was reminded to clear the dusty material and properly handle them in
the future.
5.1.15
A stockpile of silt was not properly covered next to the
waste storage area at NB42. The Contractor was reminded to cover the stockpile
with tarpaulin sheet.
5.1.16
Uncovered opened bags of cement were left on the ground
near the grout mixing plant and near the u-channel at Bridge 12A. The Contractor
was advised to cover the opened bags of cement and properly handle cement in
the future.
Noise
5.1.17 No adverse observation
was identified in the reporting period.
Water Quality
5.1.18
Accumulation of silt and stagnant water was observed in the
tray next to the sedimentation tank at Bridge 12A. The Contractor was reminded
to clear the silt and stagnant water in the tray regularly.
5.1.19 The u-channel on the
slope at Gate 30 was blocked by silt and felled trees. The Contractor was
advised to clear the silt and remove the felled trees from the u-channel.
Chemical and Waste Management
5.1.20
An oil drum was placed on ground without drip tray
underneath Lam Kam Flyover. The Contractor was reminded to provide drip tray to
all chemical containers on site.
5.1.21
Excavated materials and non-inert C&D waste were
accumulated near the sump pit at W73. The Contractor was reminded to keep
excavated materials and C&D waste away from the sump pit and dispose of the
waste in a timely manner.
5.1.22 A drip tray of chemical
containers at Gate 30 was filled with silt. The Contractor was advised to clear
the silt and prevent silt from getting into drip trays.
Landscape and Visual Impact
5.1.23
Identification was missing for the transplanted trees
within the site at Area B. The Contractor was reminded to tag the transplanted
trees with the identification numbers.
6
Advice
on the Solid and Liquid Waste Management Status
6.
6.1.1
The Contract 1 Contractor (CSHK) and the Contract 2
Contractor (GCL) are registered as chemical waste producers for Stage 1 of the Project.
C&D material sorting was carried out on site. Sufficient numbers of
receptacles were available for general refuse collection.
6.1.2
As advised by the Contract 1 Contractor (CSHK), 1911m3
of inert C&D material was disposed as public fill to Tuen Mun 38, while
358m3 of general refuse were disposed at NENT landfill, 10677kg of
metal, 521kg of paper/cardboard and 988kg of plastic were collected by
recycling contractor in the reporting quarter. 32540m3 of inert
C&D materials were reused on site.
6.1.3
As advised by the Contract 2 Contractor (GCL), 1755m3
of inert C&D material were disposed to Tuen Mun 38 and 376m3 of
general refuse was disposed to NENT landfill in the reporting period.
6.1.4
The Contract 1 Contractor (CSHK) and the Contract 2 Contractor
(GCL) are advised to maintain on site waste sorting and recording system and
maximize reuse / recycle of C&D wastes.
7
Summary
of Non-compliance (Exceedances) of the Environmental Quality
7.
7.1.
There was no 1-hour TSP, 24-hour TSP and
construction noise monitoring exceedance recorded in the reporting quarter.
7.2.
There were two (2) noise related complaints
followed up by Environmental Team in the reporting period, but they were
related to time period outside the 0700-1900 hours of normal weekdays, hence no
Action Level exceedance of noise was recorded. The details of the noise related
complaints are described in Section 8 of this report.
8
Environmental
Complaints, Notification of Summons and Successful Prosecutions
8.
8.1.
A 24-hour complaint hotline at 6628 8366 has
been established for Stage 1 (both Contract 1 and Contract 2) of the Project.
Also a 24-hour hotline at 8201 6669 is established for Contract 1 of the
Project. The hotline numbers are displayed at the site entrances, fencings and
project signboards, as well as printed on publications for the public, such as
newsletters.
8.2.
No notification of summons and prosecutions
was received in the reporting quarter.
8.3.
Two (2) environmental complaints were
followed up by Environmental Team in the reporting quarter.
8.1.1
EPD referred a public complaint about renovation noise from
roadwork at Ha Wun Yiu, Tai Po, at midnight on 10 December 2010. As informed by
the Contract 1 (HY/2008/09) Contractor (CSHK) and Contract 2 (HY/2009/08)
Contractor (GCL) of Stage 1 of the Project, and confirmed by the Engineer, no
construction activity was carried out by the Contractors of Stage 1 of the
Project at the concerned area during the concerned timeslot. The complaint was
considered unrelated to the Project works.
8.1.2
EPD referred a public complaint on 4 January 2011 about
construction noise was still generated on Sunday from the construction site of
China State Construction Engineering (Hong Kong) Ltd. (CSHK) at Tolo Highway
near Lai Chi Shan. The noise was particularly serious on 2 January 2011 (Sunday)
starting from 09:00am. As informed by the Contractor (CSHK) and confirmed by
the Engineer of the Project, floor cleaning and wood surface gluing works were
carried out on the bridge deck next to Lai Chi Shan on 2 January 2011. Although
a valid CNP was obtained for the use of certain powered mechanical equipments,
no mechanical equipment was in operation on the date.
The complaint
could be project related and the Contract 1 Contractor (CSHK) was recommended
the mitigated measures as follows:
- Strictly
comply with the requirements of the approved CNP for works carried out in
restricted hours;
- Better
scheduling of works to minimize noise nuisance;
- Instruct
the site workers to keep the noise from manual works to minimum; and
- Foster
better public relations with the sensitive receivers nearby.
8.4.
Statistics on complaints, notifications of
summons and successful prosecutions are summarized in Appendix G.
9
Comments,
recommendations and Conclusions
Comments on Mitigation Measures
9.
9.1.
According to the environmental site
inspections performed in the reporting quarter, the following recommendations
were provided:
Air Quality Impact
l
All plants on site should be properly maintained to avoid dark smoke
emission.
l
All vehicles should be washed
to remove any dusty materials before leaving the site.
l
Haul roads should be
sufficiently dampened to minimize fugitive dust generation.
l
Wheel washing facilities should
be properly maintained to ensure properly functioning.
l
Temporary exposed slopes and
open stockpiles should be properly covered.
l
Enclosure should be erected for
cement mixing operations.
l
Ensure all vehicles to be
washed before leaving the site.
l
Provide water spraying to suppress fugitive dust for any dusty
construction activity.
Construction Noise Impact
l
Properly erect the temporary
noise barriers in accordance with the Environmental Permit requirement.
l
Noise barriers should be
closely packed and properly aligned to ensure effective noise reduction.
l
Noisy operations should be
oriented to a direction away from sensitive receivers as far as possible.
l
Sound insulation materials
shall be wrapped at the breaker tip for concrete breaking
works.
l
Better scheduling of
construction works to minimize noise nuisance.
Water Quality Impact
l
Stagnant water accumulated in drip trays should be removed.
l
Silt, debris and leaves
accumulated at public drains and perimeter u-channels should be cleaned up
regularly.
l
Silty effluent should be
treated/desilted before discharged. Untreated effluent should be prevented from
entering public drain channel.
Chemical and Waste Management
l
C&D material should be sorted and removed timely.
l
All plants and vehicles on site
should be properly maintained to prevent oil leakage.
l
Oil stains on soil surface and empty chemical containers should be
cleared and disposed of as chemical waste.
Landscape and Visual Impact
l
All retained trees should be properly fenced off at the works area.
Recommendations on EM&A
Programme
9.2.
The impact air quality and noise monitoring
programme ensured that any deterioration in environmental condition was readily
detected and timely actions taken to rectify any non-compliance. Assessment and
analysis of monitoring results collected demonstrated the environmental
acceptability of Stage 1 of the Project. The weekly environmental site
inspections ensured that all the environmental mitigation measures recommended
in the ERR were effectively implemented.
9.3.
The EM&A programme effectively monitored
the environmental impacts from the construction activities and no particular
recommendation was advised for the improvement of the programme.
Conclusions
9.4.
The construction phase and EM&A programme
of Stage 1 of the Project commenced on 23 November 2009.
9.5.
Air quality and noise monitoring, weekly site
inspections were carried out in the reporting quarter, in accordance with the
updated EM&A manual.
9.6.
All 1-hour and 24-hour TSP monitoring results
complied with the Action / Limit Level in the reporting quarter.
9.7.
There were two (2) noise related complaints
followed up by Environmental Team in the reporting period, but they were
related to time period outside the 0700-1900 hours of normal weekdays, hence no
Action Level exceedance of noise was recorded. No Limit Level exceedance for
construction noise was recorded at all monitoring stations in the reporting
period.
9.8.
Two (2) environmental complaints were
followed up by Environmental Team in the reporting period
9.9.
No notification of summons and prosecution
was received in the reporting quarter.
