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) issued by EPD
on 23 December 2008.
Subsequently, EPD issued a Variation of Environmental Permit (EP-324/2008/A)
(VEP) on 31 January 2012.
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 February 2014; 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 Environmental Monitoring and
Audit (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 and 31 December
2013.
As informed by the Contract
1 Contractor (China State Construction Engineering
(Hong Kong) Ltd.),
construction activities in the reporting period were:-
-
Temporary shoring, sheetpiling and excavation
-
At-grade road construction
-
Widening and demolition of central dividers
-
Retaining wall construction
-
Noise barrier footing construction
-
Noise barrier panels installation
-
Asphalt laying
-
Installation of Drainage Pipes
-
Modification of Edge coping
The
construction works carried out by the Contract 2
Contractor (Gammon Construction Ltd.) in the reporting period were:-
-
Condition survey of existing structures
-
Setting up the temporary traffic arrangement
-
Excavation of trial trenches to locate existing
utilities
-
Construction of haul road
-
Construction of concrete profile barrier and
beam barrier
-
Construction of Pilecap / Spread footing of
Noise Barrier / Semi Noise Enclosure
-
Slope works, including installation of soil
nails
-
NTHA mitigation works
-
Construction of retaining walls
-
Noise barrier construction
-
Modification of existing bridge structures
-
Entrusted watermains works
-
Sewer Installation
-
Road and drainage works; and Landscaping works
There was no reporting change
required in the reporting month.
Breaches of Action and Limit Levels for Air
Quality
No
exceedance of Action and Limit Level was recorded for 1-hour and 24-hour TSP
monitoring in the reporting month.
Breaches of Action and Limit Levels for Noise
No Action Level exceedance of construction noise was recorded in the
reporting month since no noise complaints related to 0700 ¨C
1900 hours on normal weekdays was received and followed by the Environmental
Team in the reporting month.
No Limit Level exceedance of construction noise was
recorded in the reporting month.
Complaint, Notification of Summons and
Successful Prosecution
One (1) noise-related complaint was received on 4
November 2013 and followed up by the Environmental Team in November and
December 2013. The summary of investigation is described in Sections 4.6.3 to
4.6.5.
One (1) air-related complaint was received on 13
December 2013 and followed up by the Environmental Team in December 2013. The
summary of investigation is described in Sections 4.6.6 to 4.6.8.
No notification of summons and successful prosecution
was received in the reporting month.
Future Key Issues
Key
issues to be considered in the coming month included:-
- Properly store and label oils and
chemicals on site;
- Chemical, chemical waste and waste
management;
- Collection of construction waste should
be carried out regularly;
- Site runoff should be properly
collected and treated prior to discharge;
- Properly maintain all drainage
facilities and wheel washing facilities on site;
- Exposed slopes should be covered up
properly if no temporary work will be conducted;
- Suppress dust generated from
excavation, breaking and drilling activities, haul road traffic and grout
mixing;
- Quieter powered mechanical equipment
should be used;
- Closely check and replace the sound
insulation materials wrapped at the concrete breaker tip regularly;
- Better scheduling of construction
works to minimize noise nuisance; and
- Tree protective measures for all
retained trees should be well maintained.
1.1.1.
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 other major
strategic routes 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.
1.1.2.
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.
1.1.3.
The Project is a designated project and
is governed by an Environmental Permit (EP-324/2008)(EP) issued by EPD on
23 December 2008. Subsequently, EPD issued a Variation of Environmental Permit
(EP-324/2008/A) (VEP) on 31 January 2012.
1.1.4.
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.
|
1.1.5.
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 January 2014;
while the construction programme of Stage 2 is currently under review.
This report focuses on Stage 1 of the Project only.
1.1.6.
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.
1.1.7.
Hyder-Arup-Black and Veatch Joint
Venture (HABVJV) are appointed by Highways Department (HyD) 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).
1.1.8.
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.
1.1.9.
AECOM Asia Co. Ltd. was employed by HyD
as the Environmental Team (ET) to undertake the Environmental
Monitoring and Audit (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.
1.1.10.
The construction phase of Stage 1 under
the EP commenced on 23 November 2009.
1.1.11.
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.
1.2.1
This is the fiftieth monthly EM&A Report
under the Agreement No. CE 20/2009 (EP) - Widening of Tolo Highway between
Island House Interchange and Tai Hang ¨C 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 in December 2013.
1.3.1
The project organization structure 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) Limited)
|
Site Agent
|
Eddie Tang
|
9863 7686
|
2667 5666
|
|
Environmental Officer
|
Michael Tsang
|
9277 4956
|
2667 5666
|
|
M L Lam
|
9489 4641
|
2667 5666
|
|
Contractor of
Stage 1, Contract 2
(Gammon Construction Limited)
|
Site Agent
|
John Chan
|
3126 1202
|
2559 3410
|
|
Environmental Officer
|
Thomson Chang
|
9213
6569
|
2559 3410
|
|
Crispin Ao
|
9223
8773
|
2559 3410
|
|
Jason Cheng
|
9837
9323
|
2559 3410
|
|
ET of Stage 1
(AECOM Asia Company Limited)
|
ET Leader
|
Y T Tang
|
3922 9393
|
3922 9797
|
1.4.1 The construction phase of Stage 1 under the EP commenced on
23 November 2009.
1.4.2 Details of the construction works carried out by the Contract
1 Contractor (China State Construction Engineering (Hong Kong) Ltd.) in this
reporting period are listed below:-
-
Temporary shoring, sheetpiling and excavation
-
At-grade road construction
-
Widening and demolition of central dividers
-
Retaining wall construction
-
Noise barrier footing construction
-
Noise barrier panels installation
-
Asphalt laying
-
Installation of Drainage Pipes
-
Modification of Edge coping
1.4.3 Details of the construction works carried out by the
Contract 2 Contractor (Gammon Construction Ltd.) in this reporting period are
listed below:-
-
Condition survey of existing structures
-
Setting up the temporary traffic arrangement
-
Excavation of trial trenches to locate existing
utilities
-
Construction of haul road
-
Construction of concrete profile barrier and
beam barrier
-
Construction of Pilecap / Spread footing of
Noise Barrier / Semi Noise Enclosure
-
Slope works, including installation of soil
nails
-
NTHA mitigation works
-
Construction of retaining walls
-
Noise barrier construction
-
Modification of existing bridge structures
-
Entrusted watermains works
-
Sewer Installation
-
Road and drainage works; and Landscaping works
1.4.4 The Construction Programmes are shown in Appendix B.
1.4.5 The general layout plan of the Project site showing the
contract areas is shown in Figure 1.1.
1.4.6 The environmental mitigation measures implementation
schedule are presented in Appendix C.
1.5.1 The EM&A programme required environmental monitoring
for air quality, noise and environmental site inspections for air quality,
water quality, noise, waste management, ecology, and landscape and visual
impact. The EM&A requirements for each parameter described in the following
sections include:-
- All monitoring
parameters;
- Monitoring
schedules for the reporting month and forthcoming months;
- Action and
Limit levels for all environmental parameters;
- Event / Action
Plan;
- Environmental
mitigation measures, as recommended in the Project EIA study final report; and
- Environmental
requirement in contract documents.
2.1.1
In accordance with the updated EM&A Manual,
baseline 1-hour and 24-hour TSP levels at 4 air quality monitoring stations
were established. Impact 1-hour TSP monitoring was conducted for at least three
times every 6 days, while impact 24-hour TSP monitoring was carried out for at
least once every 6 days. The Action and Limit level of the air quality
monitoring is provided in Appendix D.
2.2.1
24-hour TSP air quality monitoring was performed
using High Volume Sampler (HVS) located at each designated monitoring station.
The HVS meets all the requirements of the updated EM&A Manual. Portable direct reading dust meters were
used to carry out the 1-hour TSP monitoring. Brand and model of the equipment is
given in Table 2.1.
Table 2.1 Air Quality Monitoring Equipment
|
Equipment
|
Brand
and Model
|
|
Portable direct reading dust meter
(1-hour TSP)
|
Sibata Digital Dust Monitor (Model
No. LD-3 and LD-3B)
|
|
High Volume Sampler
(24-hour TSP)
|
Tisch Total Suspended Particulate
Mass Flow Controlled High Volume Air Sampler (Model No. TE-5170
& GMW-2310)
|
2.3.1
Monitoring locations AM2 and AM3 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, baseline and impact air quality monitoring was conducted at 13
Ha Wun Yiu (AM1) and Tai Kwong Secondary School (AM4) respectively. The
monitoring station at 13 Ha Wun Yiu (AM1) was relocated to Fan Sin Temple, 3
Sheung Wun Yiu (AM1A) in February 2010. Also, the monitoring station at Tai
Kwong Secondary School (AM4) was relocated to 168 Shek Kwu Lung Village (AM4A)
in September 2011.
2.3.2 Figure
2.1 shows the locations of monitoring stations. Table 2.2 describes the details
of the monitoring stations.
Table 2.2 Locations
of Impact Air Quality Monitoring Stations
|
Monitoring Station
|
Location
|
Description
|
|
AM1A
|
3 Sheung
Wun Yiu
|
Ground
floor at the boundary outside Fan Sin Temple
|
|
AM2
|
12 Shan
Tong New Village
|
Ground
floor outside the premises
|
|
AM3
|
Riverain
Bayside
|
Roof of
the switch room
|
|
AM4A
|
168 Shek Kwu Lung Village
|
Roof of
the switch room
|
2.4.1
Table 2.3 summarizes the monitoring parameters,
frequency and duration of impact TSP monitoring.
Table 2.3 Air
Quality Monitoring Parameters, Frequency and Duration
|
Parameter
|
Frequency
and Duration
|
|
1-hour TSP
|
Three times every 6 days while the highest dust impact was
expected
|
|
24-hour TSP
|
Once every 6 days
|
2.5.1
24-hour TSP Monitoring
(a)
The HVS was installed in the vicinity of
the air sensitive receivers. The
following criteria were considered in the installation of the HVS.
(i)
A horizontal platform with appropriate
support to secure the sampler against gusty wind was provided.
(ii)
The distance between the HVS and any
obstacles, such as buildings, was at least twice the height that the obstacle
protrudes above the HVS.
(iii)
A minimum of 2 meters separation from
walls, parapets and penthouse for rooftop sampler.
(iv)
A minimum of 2 meters separation from any supporting
structure, measured horizontally.
(v)
No furnace or incinerator flues nearby.
(vi)
Airflow around the sampler was
unrestricted.
(vii)
Permission was obtained to set up the
samplers and access to the monitoring stations.
(viii)
A secured supply of electricity was
obtained to operate the samplers.
(ix)
The sampler was located more than 20
meters from any dripline.
(x)
Any wire fence and gate, required to
protect the sampler, did not obstruct the monitoring process.
(xi)
Flow control accuracy was kept within
¡À2.5% deviation over 24-hour sampling period.
(b)
Preparation of Filter Papers
(i)
Glass fibre filters, G810 were labelled
and sufficient filters that were clean and without pinholes were selected.
(ii)
All filters were equilibrated in the
conditioning environment for 24 hours before weighing. The conditioning
environment temperature was around 25 ¡ãC
and not variable by more than ¡À3 ¡ãC;
the relative humidity (RH) was < 50% and not variable by more than ¡À5%. A
convenient working RH was 40%.
(iii)
All filter papers were prepared and
analysed by ALS Technichem (HK) Pty Ltd., which is a HOKLAS accredited
laboratory and has comprehensive quality assurance and quality control
programmes.
(c)
Field Monitoring
(i)
The power supply was checked to ensure
the HVS works properly.
(ii)
The filter holder and the area
surrounding the filter were cleaned.
(iii)
The filter holder was removed by
loosening the four bolts and a new filter, with stamped number upward, on a
supporting screen was aligned carefully.
(iv)
The filter was properly aligned on the
screen so that the gasket formed an airtight seal on the outer edges of the
filter.
(v)
The swing bolts were fastened to hold
the filter holder down to the frame.
The pressure applied was sufficient to avoid air leakage at the edges.
(vi)
Then the shelter lid was closed and was
secured with the aluminum strip.
(vii)
The HVS was warmed-up for about 5
minutes to establish run-temperature conditions.
(viii)
A new flow rate record sheet was set
into the flow recorder.
(ix)
On site temperature and atmospheric
pressure readings were taken and the flow rate of the HVS was checked and
adjusted at around 1.1 m3/min, and complied with the range specified
in the updated EM&A Manual (i.e. 0.6-1.7 m3/min).
(x)
The programmable digital timer was set
for a sampling period of 24 hrs, and the starting time, weather condition and
the filter number were recorded.
(xi)
The initial elapsed time was recorded.
(xii)
At the end of sampling, on site
temperature and atmospheric pressure readings were taken and the final flow
rate of the HVS was checked and recorded.
(xiii)
The final elapsed time was recorded.
(xiv)
The sampled filter was removed carefully
and folded in half length so that only surfaces with collected particulate
matter were in contact.
(xv)
It was then placed in a clean plastic
envelope and sealed.
(xvi)
All monitoring information was recorded
on a standard data sheet.
(xvii)
Filters were then sent to ALS
Technichem (HK) Pty Ltd. for analysis.
(d)
Maintenance and Calibration
(i)
The HVS and its accessories were
maintained in good working condition, such as replacing motor brushes routinely
and checking electrical wiring to ensure a continuous power supply.
(ii)
5-point calibration of the HVS was
conducted using TE-5025A
Calibration Kit prior to the commencement of baseline monitoring. Bi-monthly
5-point calibration of the HVS will be carried out during impact monitoring.
(iii)
Calibration certificate of the HVSs are
provided in Appendix E.
2.5.2
1-hour TSP Monitoring
(a)
Measuring Procedures
The measuring procedures of the
1-hour dust meter were in accordance with the Manufacturer¡¯s Instruction Manual
as follows:-
(i)
Turn the power on.
(ii)
Close the air collecting opening cover.
(iii)
Push the ¡°TIME SETTING¡± switch to [BG].
(iv)
Push ¡°START/STOP¡± switch to perform
background measurement for 6 seconds.
(v)
Turn the knob at SENSI ADJ position to
insert the light scattering plate.
(vi)
Leave the equipment for 1 minute upon
¡°SPAN CHECK¡± is indicated in the display.
(vii)
Push ¡°START/STOP¡± switch to perform
automatic sensitivity adjustment. This measurement takes 1 minute.
(viii)
Pull out the knob and return it to
MEASURE position.
(ix)
Push the ¡°TIME SETTING¡± switch the time
set in the display to 3 hours.
(x)
Lower down the air collection opening
cover.
(xi)
Push ¡°START/STOP¡± switch to start
measurement.
(b)
Maintenance and Calibration
(i)
The 1-hour TSP meter was calibrated at
1-year intervals against a continuous particulate TEOM Monitor, Series 1400ab.
Calibration certificates of the Laser Dust Monitors are provided in Appendix E.
(ii)
1-hour validation checking of the TSP
meter against HVS is carried out yearly at the air quality monitoring
locations.
2.6
Monitoring Schedule for the Reporting Month
2.6.1
The schedule for environmental monitoring in
December 2013 is provided in Appendix F.
2.7.1
The baseline condition of air quality in the
Project site was reviewed in October and November 2009. A baseline monitoring
of air quality, in terms of 1-hour Total Suspended Particulates (TSP) and
24-hour TSP, was carried out from 20 October 2009 to 4 November 2009 for 14
days. The baseline monitoring report was submitted by ETL and approved by the
ER and the IEC on 9 November 2009. Action Levels for air quality were established
and are summarized in Table 2.4, Table 2.5 and Appendix D.
2.8.1
The monitoring results for 1-hour TSP and
24-hour TSP are summarized in Table 2.4 and 2.5 respectively. Detailed impact air
quality monitoring results are presented in Appendix G.
Table 2.4 Summary
of 1-hour TSP Monitoring Results in the Reporting Period
|
|
Average (mg/m3)
|
Range (mg/m3)
|
Action Level (mg/m3)
|
Limit Level (mg/m3)
|
|
AM1A
|
79.6
|
72.6 ¨C 86.2
|
302.1
|
500
|
|
AM2
|
79.8
|
73.2 ¨C 84.4
|
301.9
|
500
|
|
AM3
|
79.3
|
73.5 ¨C 84.3
|
301.9
|
500
|
|
AM4A
|
80.5
|
75.9 ¨C 85.0
|
302.3
|
500
|
Table 2.5 Summary of
24-hour TSP Monitoring Results in the Reporting Period
|
|
Average (mg/m3)
|
Range (mg/m3)
|
Action Level (mg/m3)
|
Limit Level (mg/m3)
|
|
AM1A
|
92.6
|
65.7 ¨C 133.8
|
176.6
|
260
|
|
AM2
|
45.8
|
24.1 ¨C 68.1
|
178.6
|
260
|
|
AM3
|
56.6
|
34.1 ¨C 82.0
|
193.1
|
260
|
|
AM4A
|
62.2
|
26.4 ¨C 102.9
|
198.5
|
260
|
2.8.2
The major dust source in the reporting period
included construction activities from Stage 1 of the Project, as well as nearby
traffic emissions.
2.8.3
All 1-hour and 24-hour TSP results were below
the Action and Limit Level at all monitoring locations in the reporting month.
2.8.4
The event action plan is annexed in Appendix J.
2.8.5
Weather information including wind speed and
wind direction is annexed in Appendix H. The information was obtained from Hong
Kong Observatory Sha Tin and Tai Mei Tuk Automatic Weather Station. As some of
the weather data in December 2013 from the Tai Mei Tuk Automatic Weather
Station were missing, the weather data from Tai Po Automatic Weather Station in
December 2013 are
included in Appendix H for supplementary purpose.
3.1.1
In accordance with the EM&A Manual, impact
noise monitoring was conducted for at least once per week during the
construction phase of Stage 1 of the Project. The Action and Limit level of the noise monitoring
is provided in Appendix D.
3.2
Monitoring Equipment
3.2.1
Noise monitoring was performed using sound
level meter at each designated monitoring station. The sound level meters deployed comply
with the International Electrotechnical Commission Publications (IEC) 651:1979
(Type 1) and 804:1985 (Type 1) specifications. Acoustic calibrator was deployed to
check the sound level meters at a known sound pressure level. Brand and model of the equipment is given
in Table 3.1.
Table 3.1 Noise
Monitoring Equipment
|
Equipment
|
Brand and Model
|
|
Integrated
Sound Level Meter
|
Rion NL-31
/ B&K 2238 / B&K 2250-L
|
|
Acoustic
Calibrator
|
Rion NC-73
|
3.3.1
Monitoring stations NM3, NM6 and NM7 were set
up at the proposed locations in accordance with updated EM&A Manual. However,
for monitoring locations: Tai Po Garden (NM1), Dynasty View (NM2), Hong Kong
Teachers¡¯ Association Lee Heng Kwei Secondary School (NM4) and Grand Palisades
(NM5), proposed in the updated EM&A Manual, impact noise monitoring was
conducted at alternative monitoring locations, as approval of access could not
be obtained from the owner¡¯s corporation of the premises or the principal of
the education institutes. The monitoring station at Tai Kwong Secondary School
(NM1) was relocated to 168 Shek Kwu Lung Village (NM1A) in September 2011.
3.3.2
Figure 2.1 shows the locations of the
monitoring stations. Table 3.2 describes the details of the monitoring
stations.
Table 3.2 Locations
of Impact Noise Monitoring Stations
|
Monitoring Station
|
Location
|
Description
|
|
NM1A
|
168 Shek Kwu Lung Village
|
1m from the exterior wall of the
village house
|
|
NM2
|
38 Ha Wun Yiu
|
1.2m from the ground floor free-field
of the village house
|
|
NM3
|
Wong Shiu Chi Middle School
|
1m from the exterior of the roof top
façade of the New Wing
|
|
NM4
|
Uptown Plaza
|
1m from the exterior of the roof top
façade of Block 4
|
|
NM5
|
The Paragon
|
1m from the exterior of the roof top
façade of the club house
|
|
NM6
|
PLK Tin Ka Ping Primary School
|
1.2m ground floor free-field near the
entrance
|
|
NM7
|
Riverain Bayside
|
1m from the exterior of the roof
façade of the switch room
|
3.4.1
Table 3.3 summarizes the monitoring parameters,
frequency and duration of impact noise monitoring.
Table
3.3 Noise
Monitoring Parameters, Frequency and Duration
|
Parameter
|
Frequency
and Duration
|
|
30-mins measurement at each monitoring station between 0700 and
1900 on normal weekdays. Leq, L10 and L90
would be recorded.
|
At least once per week
|
3.5.1
Monitoring Procedure
(a)
Façade measurements were made at all
monitoring locations, except monitoring stations NM2 and NM6.
(b)
The sound level meter was set on a
tripod at a height of 1.2 m
above the ground for free-field measurements at NM2 and NM6.
(c)
The battery condition was checked to
ensure the correct functioning of the meter.
(d)
Parameters such as frequency weighting,
the time weighting and the measurement time were set as follows:-
(i)
frequency weighting: A
(ii)
time weighting: Fast
(iii)
time measurement: Leq(30-minutes)
during non-restricted hours i.e. 07:00 ¨C 1900 on normal weekdays; Leq(5-minutes)
during restricted hours i.e. 19:00 ¨C 23:00 and 23:00 ¨C 07:00 of normal weekdays, whole day of
Sundays and Public Holidays
(e)
Prior to and after each noise
measurement, the meter was calibrated using the acoustic calibrator for 94dB(A)
at 1000 Hz. If the difference in
the calibration level before and after measurement was more than 1 dB(A), the
measurement would be considered invalid and repeat of noise measurement would
be required after re-calibration or repair of the equipment.
(f)
During the monitoring period, the Leq,
L10 and L90 were recorded. In addition, site conditions and noise
sources were recorded on a standard record sheet.
(g)
Noise measurement was paused during
periods of high intrusive noise (e.g. dog barking, helicopter noise) if
possible. Observations were recorded when intrusive noise was unavoidable.
(h)
Noise monitoring was cancelled in the
presence of fog, rain, wind with a steady speed exceeding 5m/s, or wind with gusts exceeding 10m/s.
3.5.2
Maintenance and Calibration
(a)
The microphone head of the sound level meter
was cleaned with soft cloth at regular intervals.
(b)
The meter and calibrator were sent to
the supplier or HOKLAS laboratory to check and calibrate at yearly intervals.
(c)
Calibration certificates of the sound
level meters and acoustic calibrators are provided in Appendix E.
3.6.1
The schedule for environmental monitoring in
December 2013 is
provided in Appendix F.
3.7.1
The monitoring results for construction noise are
summarized in Table 3.4 and the monitoring data is provided in Appendix I.
Table 3.4 Summary of Construction Noise Monitoring Results in the Reporting
Period
|
|
Average, dB(A),
Leq (30 mins)
|
Range, dB(A),
Leq (30 mins)
|
Limit Level, dB(A),
Leq (30 mins)
|
|
NM1A
|
63.2
|
61.9 ¨C 64.2
|
75
|
|
NM2
|
65.9*
|
62.9 ¨C 67.5*
|
75
|
|
NM3
|
61.3
|
58.4 ¨C 63.5
|
70#
|
|
NM4
|
64.1
|
57.2 ¨C 65.5
|
75
|
|
NM5
|
61.9
|
56.9 ¨C 64.1
|
75
|
|
NM6
|
61.8*
|
59.6 ¨C 64.4*
|
70#
|
|
NM7
|
59.5
|
54.6 ¨C 62.8
|
75
|
*+3dB(A) Façade correction
included
# Limit Level of 70dB(A) applies to education institutes while 65dB(A)
applies during school examination period.
3.7.2
No noise complaint related to 0700 ¨C 1900 hours
on normal weekdays was received and followed
up by the Environmental Team in the reporting period. Hence, no Action Level
exceedance was recorded.
3.7.3
No noise monitoring result exceeding the Limit
Level was recorded at all monitoring stations in the reporting month.
3.7.4
Major noise sources during the noise monitoring
included construction activities of Stage 1 of the Project and nearby traffic
noise and general school activities.
3.7.5
The event action plan is annexed in Appendix J.
4.1.1
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 month, 4 site
inspections were carried out on 4, 11, 18 and 24 December 2013 for Contract 1 of
the Project, and 4 site inspections for Contract 2 of the Project were carried
out on 5, 12, 19, 24 and 31 December 2013.
4.1.2 The
environmental site inspections summaries are provided in Appendix K.
4.1.3
Particular observations during the site inspections for
Contract 1 are described below:
Air Quality
4.1.4
Dry soil surface was observed on access roads and the
Contractor was reminded to spray the access road with water or dust suppression
chemicals to maintain the entire surface wet.
Noise
4.1.5
No adverse observation was identified in the
reporting month.
Water Quality
4.1.6
No adverse observation was identified in the
reporting month.
Chemical and Waste Management
4.1.7
The Contractor was reminded to provide a drip
tray to hold the oil can.
4.1.8
Oil drums were observed without drip tray and
the Contractor was reminded to provide trays to oil drums as a mitigation
measure.
Landscape and Visual Impact
4.1.9
No adverse observation was identified in the
reporting month.
Miscellaneous
4.1.10
No adverse observation was identified in the
reporting month.
4.1.11 Particular
observations and reminder during the site inspections for Contract 2 are
described below:
Air Quality
4.1.12
The Contractor was reminded to cover the
exposed slope at Gate 48 with tarpaulin sheets.
4.1.13
Mud was observed at the edge of the footpath at
NLKP3. The Contractor was reminded to clear the mud and increase the height of
sand bags to prevent the overflow of sand from the construction site.
Noise
4.1.14
No adverse observation was identified in the
reporting month.
Water Quality
4.1.15
Muddy water was observed at the edge of the
road at W74. The contractor was reminded to direct the water to an appropriate
discharge point so that it will not mix with sand to produce muddy water.
Chemical and Waste Management
4.1.16
The Contractor was reminded to provide a drip
tray to oil cans at Gate 2 or remove the oil cans.
Landscape and Visual Impact
4.1.17 No
adverse observation was identified in the reporting month.
Miscellaneous
4.1.18
No adverse observation was identified in the
reporting month.
4.2
Advice on the Solid and Liquid Waste
Management Status
4.2.1
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.
4.2.2
As advised by the Contract 1 Contractor (CSHK),
162m3 of inert
C&D materials was disposed of to the public fill at Tuen Mun 38 (of which 16m3 was broken concrete), while
117m3
of general refuse was disposed of at the NENT landfill. 95kg of
paper/cardboard packaging, 2,067kg of plastics and 0kg of metals were collected by recycling contractors in the
reporting month. 1,614m3 and 857m3 of inert
C&D materials were reused on site and reused in NENT for backfilling
purpose respectively. 0kg of chemical waste was collected by the licensed
contractor in the reporting period.
4.2.3
As advised by the Contract 2 Contractor (GCL), 240m3
of inert C&D materials was disposed of to Tuen Mun 38 and 240m3
of general refuse was disposed of to the NENT landfill in the reporting period.
No
paper/cardboard packaging, plastics or metals was collected by the recycling contractors in the
reporting month. Besides, no chemical waste was collected by the licensed
contractor in the reporting period.
4.2.4
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.
4.3
Environmental Licenses and Permits
4.3.1 The
environmental licenses and permits for Stage 1 of the Project and valid in the
reporting month is summarized in Table 4.1.
Table 4.1 Summary
of Environmental Licensing and Permit Status
|
Statutory Reference
|
License/ Permit
|
License or Permit No.
|
Valid Period
|
License/ Permit Holder
|
Remarks
|
|
From
|
To
|
|
EIAO
|
Environmental
Permit
|
EP-324/2008/A
|
31/01/2012
|
N/A
|
HyD
|
Tolo
Highway/Fanling Highway between Island House
Interchange and Ma Wo
|
|
WPCO
|
Discharge License
(Office)
|
WT00005096-2009
|
03/12/2009
|
31/12/2014
|
CSHK
|
Discharge at Site
Office
|
|
Discharge License
(Site)
|
WT00005445-2009
|
15/12/2009
|
31/12/2014
|
CSHK
|
Discharge of
Construction Runoff
|
|
Discharge License
(Office)
|
WT00006782-2010
|
25/06/2010
|
30/06/2015
|
GCL
|
Discharge at Site
Office
|
|
Discharge License
(Site)
|
WT00007162-2010
|
09/08/2010
|
31/07/2015
|
GCL
|
Discharge of
Construction Runoff
|
|
WDO
|
Chemical Waste
Producer Registration
|
5213-727-C3249-46
|
25/09/2009
|
N/A
|
CSHK
|
Chemical waste
produced in Contract HY/2008/09
|
|
5213-722-G2347-18
|
18/05/2010
|
N/A
|
GCL
|
Chemical waste
produced in Contract HY/2009/08
|
|
WDO
|
Billing
Account for Disposal of
Construction Waste
|
7009328
|
08/09/2009
|
N/A
|
CSHK
|
Waste disposal in
Contract HY/2008/09
|
|
7010320
|
02/03/2010
|
N/A
|
GCL
|
Waste disposal in
Contract HY/2009/08
|
|
NCO
|
Construction Noise
Permit
|
GW-RN0417-13
|
21/07/2013
|
17/01/2014
|
CSHK
|
Construction works at Island
House Interchange
|
|
GW-RN0468-13
|
19/08/2013
|
23/01/2014
|
CSHK
|
Routine Road Maintenance
|
|
GW-RN0561-13
|
02/10/2013
|
01/04/2014
|
CSHK
|
Modification of Sign Gantry_G11, G13,
G70, G73, G74, G75 & G76
|
|
GW-RN0572-13
|
07/09/2013
|
03/12/2013
|
CSHK
|
Modification of Sign Gantry_G14, G15,
G16, G17, G65, G66, G67 & G68
|
|
GW-RN0607-13
|
19/10/2013
|
22/12/2013
|
CSHK
|
Road Paving on Tolo Highway between
Ma Wo and NLKRB (Shatin Bound)
|
|
GW-RN0614-13
|
19/10/2013
|
22/12/2013
|
CSHK
|
Road Paving on North Bound of Tolo
Highway at Island House Interchange
|
|
GW-RN0620-13
|
19/10/2013
|
22/12/2013
|
CSHK
|
Road Paving Reconstruction on Tolo
Highway (Fanling Bound) Between
NB12 and Tat Wan Road
|
|
GW-RN0647-13
|
01/11/2013
|
31/12/2013
|
CSHK
|
Carrying out construction works
within MTRC's tracks protection zone
|
|
GW-RN0693-13
|
16/11/2013
|
22/12/2013
|
CSHK
|
Road Paving on Tolo Highway at Island
House Interchange (Shatin Bound)
|
|
GW-RN0703-13
|
19/11/2013
|
28/12/2013
|
CSHK
|
Installation of Noise Barrier on
Kwong Fuk West Viaduct
|
|
GW-RN0707-13
|
19/11/2013
|
28/12/2013
|
CSHK
|
Road Paving Reconstruction on Tolo Highway (Fanling & Shatin
Bound) near Shan Tong Road
|
|
GW-RN0710-13
|
21/11/2013
|
24/12/2013
|
CSHK
|
Sign Gantry at Tolo Highway between Yuen Chau Tsai and Ma Wo
|
|
GW-RN0726-13
|
27/11/2013
|
31/12/2013
|
CSHK
|
Concreting Works on Tolo Highway
(Fanling Bound) near Tat Wan Road
|
|
GW-RN0741-13
|
03/12/2013
|
28/12/2013
|
CSHK
|
Installation of Sign Gantries G18
& G19
|
|
GW-RN0742-13
|
02/12/2013
|
28/12/2013
|
CSHK
|
Road Pavement at Shatin Bound of
Tolo Highway between Wan Tau Tong Estate and Tai Po Road
|
|
GW-RN0763-13
|
10/12/2013
|
28/12/2013
|
CSHK
|
Modification of Sign Gantries G13
G14 G16 G17& G66
|
|
GW-RN0766-13
|
14/12/2013
|
23/02/2014
|
CSHK
|
Road Paving on Tolo Highway between
Ma Wo and NLKRB
(Shatin Bound)
|
|
GW-RN0788-13
|
22/12/2013
|
23/02/2014
|
CSHK
|
Road pavement for Slip Road from
Tolo Highway to Tai Po Road near
Yuen Chau Tsai
(Fanling Bound)
|
|
GW-RN0789-13
|
02/01/2014
|
31/03/2014
|
CSHK
|
Construction works next to MTRC's
tracks protection zone
|
|
GW-RN0801-13
|
28/12/2013
|
23/02/2014
|
CSHK
|
Road Marking Alternation at Tolo
Highway at
Island House Interchange
|
|
GW-RN0807-13
|
29/12/2013
|
23/02/2014
|
CSHK
|
Road pavement for Slip Road from
Tolo Highway to Tai Po Road near
Yuen Chau Tsai
(Fanling Bound)
|
|
GW-RN0810-13
|
31/12/2013
|
23/02/2014
|
CSHK
|
Road Paving Reconstruction on
Slip Road from Tai Po Road-Yuen Chau Tsai
|
|
GW-RN0530-13
|
03/10/2013
|
02/02/2014
|
GCL
|
Renewal of GW-RN0194-13
Tolo Highway near Tai Po Tau Raw Water Pumping Station
|
|
GW-RN0695-13
|
17/11/2013
|
12/05/2014
|
GCL
|
General work and asphalt paving at Tolo Highway near Shek Kwu Lung and
Ma Wo (CH18.1 - 19.2)
|
|
GW-RN0785-13
|
28/12/2013
|
27/02/2014
|
GCL
|
Stitching
Construction at Section of Tolo Highway (Shatin Bound) CH19 to CH18.8A
|
|
GW-RN0786-13
|
19/12/2013
|
11/06/2014
|
GCL
|
Renewal of
GW-RN0484-13
Tolo Highway and Fanling Highway near Tai Po Tai Wo Road, Lam Kam Interchange
& Tai Wo Service Road West
|
|
GW-RN0795-13
|
24/12/2013
|
27/02/2014
|
GCL
|
Erection of Sign
Gantry at Tolo Highway (Fanling Bound) CH19.9 to CH20.1 near Lam Kam
Interchange
|
4.4.1
In response to the site audit findings, the
Contractors carried out corrective actions.
4.4.2
A summary of the Implementation Schedule of
Environmental Mitigation Measures (EMIS) is presented in Appendix C. Most of
the necessary mitigation measures were implemented properly.
4.5
Summary of Exceedances of the Environmental
Quality Performance Limit
4.5.1
All 1-hour and 24-hour TSP monitoring results
complied with the Action / Limit Levels in the reporting period.
4.5.2
For construction noise, no Action and Limit
Level exceedance was recorded at all monitoring stations in the reporting
period.
4.6
Summary of Complaints, Notification of
Summons and Successful Prosecutions
4.6.1
The Environmental Complaint Handling Procedure
is annexed in Figure 4.1.
4.6.2 Two (2)
complaints were followed up by the Environmental Team in the reporting period
4.6.3 One (1)
noise-related complaint was received on 4 November 2013 and followed up by the
Environmental Team in November and December 2013.
4.6.4
EPD referred a noise complaint from a resident
living near Uptown Plaza at Tai Po. The complainant expressed that the
construction work between late-night hours on 2 November and early morning of 3
November at Tolo Highway disturbed the resident¡¯s sleep.
4.6.5
According to the information provided by the
Contractor (China State Construction Engineering (HK) Ltd.) and confirmed by
the Engineer of the Project, road marking alternation works was carried out at
Tolo Highway between 23:00 on 2 November 2013 and 05:00 on 3 November 2013. The
permitted works area and the exact working area for road marking alternation
are indicated in the site location plan.
A valid
Construction Noise Permit (CNP no.: GW-RN0607-13) has been obtained for the use
of certain specified Powered Mechanical Equipments (PMEs) and carrying out of
certain prescribed construction work at Tolo Highway (Shatin Bound) between
Grand Dynasty View and the Paragon between 23:00 on Saturdays and 05:00 on
Sundays, subject to the conditions imposed in the CNP. The numbers and types of
PMEs operated between 23:00 on 2 November 2013 and 05:00 on 3 November 2013
complied with the CNP. The list of plants used during the construction works
(provided by the Contractor and confirmed by the Engineer) on 2 and 3 November
2013 was also checked for verification.
Notification
was sent to EPD at 13:18 hours on 1 November 2013 prior to the commencement of
the construction work but the notification period was less than the required 48
hours before the said works carried out at 23:00 on 2 November 2013.
The
Contractor notified the nearby residents in advance of the construction work by
disseminating a public notice to the estates management offices of the affected
residential buildings on 1 November 2013.
However,
the noise complaint is considered project-related.
Upon
the receipt of the complaint, the Contractor stopped the road works as soon as
practicable as determined by The Highways Department. A safety net had been set
up to cover the skip of dump trucks to reduce the dropping height of milling
materials (rubbles) to reduce the impact noise for any future works conducted
under CNP no.: GW-RN0607-13, but the results were not satisfactory. Hence, this
measure will not be implemented. However, the Contractor was urged to shorten
the time of handling rubbles as much as possible to minimize the nuisance
caused to the nearby residents. Additionally, the Contractor has shut off
idling plants at once. The Contractor also wrapped up the reversing alarm of
the PMEs with sound-absorbing materials to reduce noise generated from similar
works so as to minimize the impacts to nearby residents.
The
Contractor has been setting up permanent noise barriers at both sides of the
section of the road where road marking alternation works were carried out. Most
of the noise barriers have been erected and the Contractor will install all the
remaining noise barrier panels by January 2014. The Contractor was prompted to
install the remaining permanent noise barriers as soon as it can.
The
Contractor also visited the Management Offices of nearby estates thereafter to
introduce them about its works programme and night works of the coming two
months. Meanwhile, a public notice was disseminated to the estates on 6
November 2013 and is displayed at the lift lobby of the estates to inform the
residents about its works.
According
to the Contractor, no further works in relation to CNP no.: GW-RN0607-13 is
scheduled before the CNP expires at 05:00 on 22 December 2013, even though the
CNP permits such prescribed use of the specified PMEs for a total of 10 nights
during its validity period. However, the Contractor was urged to comply with conditions
of this and subsequent CNPs for future works and make advance notifications to
the EPD at least 48 hours before the scheduled commencement of works. The
Contractor was prompted to improve their management and schedule night works as
early as possible to prevent late notification. The Contractor was reminded to
review the current working method and implement noise mitigation measures so as
to minimize nuisance caused to sensitive receivers.
In
addition, the Contractor is advised to implement the mitigation measures as
stated in ¡°Recommended Mitigation Measures¡± below:
-
Strictly comply with the requirements of the
approved CNP for works carried out in restricted hours;
-
Have better scheduling of works to minimize
noise nuisance;
-
Instruct the site workers to keep the noise in
minimum during construction works in restricted hours; and
-
Foster better public relations with the
sensitive receivers nearby.
4.6.6
One (1) air-related complaint was received on
13 December 2013 and followed up by the Environmental Team in December 2013.
4.6.7
EPD referred a complaint from a resident of Ma
Wo Tsuen about the dust emission at the construction site of the Tolo Highway
widening construction works at Ma Wo. The complainant has complained about the
air pollution problem for three years and that no improvement has been seen.
The
complainant stated that there are no water sprinklers in the construction site
and the residents of Ma Wo Tsuen have requested the Contractor to use tarpaulin
sheets.
4.6.8
As informed by the Contractor (Gammon Construction
Ltd) and confirmed by the Engineer of the Project, catchment drain, backfilling
and compaction work of general fill materials at W38 and delivery of fill
materials from W48 to W38 by dump truck on 12 December 2013 (Thursday) and 13
December 2013 (Friday) were carried out at the work areas near the residential
flat of the complainant.
Mitigation measures, including water spraying by sprinklers
on haul roads and exposed slopes, covering non-working slopes by tarpaulin
sheets at a sight distance from the complainant before the complete
construction of permanent footpath, full-time manual water spraying, and the
tarpaulin dust screen of appropriately 1.8 m in height set on the top of W45-47
which is along W44 and NB31, and a section of footpath on W38, were taken by
the Contractor. As shown in Figure 4B, water is sprayed manually to the leaves
of the trees to minimize the emitted dust from dropping to the complainant¡¯s
house and Ma Wo Tsuen through the trees. As shown in Figure 5, the loading and
unloading height of general fill materials at W38 was kept to a minimum.
Besides, in case any dump truck passes through W45-47, the mechanical covering
will not open until they reach the unloading point.
Wheel washing has been carried out at the site entrance. The
dump truck responsible for the delivery of fill materials for W38 only moved
within W48 and W38, which was not exiting from the site entrance on 12 and 13
December 2013.
With reference to the monitoring results recorded on the day closest to
the day of complaint at the nearest EM&A monitoring station (AM1A- Sheung Wun Yiu), the 24-hour TSP level on 10
December 2013 was 133.8 ug/m3, which was below the action level of
176.6 ug/m3. Besides, the average 1-hour TSP 10 December 2013
at the nearest EM&A monitoring station (AM1A-
Sheung Wun Yiu) was 83.5 ug/m3, which was
also below the action level of 302.3ug/m3.
Nevertheless, the complaint was considered project-related.
Therefore, the Contractor is reminded to enhance the dust mitigation
measures as stated in the ¡°Recommended Mitigation Measures¡±
below:
-
Confirm
the implementation of dust mitigation measures (erection of
tarpaulin dust screens along the work areas W38-48, spraying water manually by
workers and sprinkler systems for the haul roads and exposed slopes at work
areas W38-48, covering non-working slopes by tarpaulin sheets within work
areas, covering dusty materials carried in dump trucks within work areas
W38-48) during all construction and dusty
activities to minimize fugitive dust generation;
-
Increase
the frequency of watering in the work areas (specially at the entrance of the construction site, and on site
haul roads and exposed slopes / areas in the work areas W38-48), so that site haul roads and exposed surfaces are in
a wet condition;
-
Cover the backfilling surface after
work;
-
Keep soil surfaces wet before loading
and unloading activities;
-
Maintain the frequency of the
environmental supervision (by the Contractor) to regularly review the adequacy
and effectiveness of dust suppression measures to suit the construction
progress;
-
Inform the complainant before dusty
activities (e.g. rock breaking, excavation, grouting and backfilling) are
carried out; and
-
Foster better public relations with
the sensitive receivers and complainants nearby.
4.6.9
No new notification of summons and prosecution
was received in the reporting period.
4.6.10
Statistics on complaints, notifications of
summons and successful prosecutions are summarized in Appendix L.
5
FUTURE
KEY ISSUES
5.1.1
The major construction works for Contract 1 in January 2014 will
be:-
-
Temporary shoring, sheetpiling and excavation
-
At-grade road construction
-
Retaining wall construction
-
Noise barrier footing construction
-
Noise barrier panels installation
-
Asphalt laying
-
Installation of drainage pipes
5.1.2
The major construction works for Contract 2 in January 2014 will
be:-
-
Condition survey of existing structures
-
Setting up the temporary traffic arrangement
-
Excavation of trial trenches to locate existing
utilities
-
Construction of haul road
-
Construction of concrete profile barrier and
beam barrier
-
Construction of Pilecap / Spread footing of
Noise Barrier / Semi Noise Enclosure
-
Slope works, including installation of soil
nails
-
NTHA mitigation works
-
Construction of retaining walls
-
Noise barrier construction
-
Modification of existing bridge structures
-
Entrusted watermains works
-
Sewer Installation
-
Road and drainage works; and Landscaping works
5.2
Key Issues for the Coming Month
5.2.1
Key issues to be considered in January 2014:-
-
Properly store and label oils and chemicals on
site;
-
Chemical, chemical waste and waste management;
-
Collection of construction waste should be
carried out regularly;
-
Site runoff should be properly collected and
treated prior to discharge;
-
Properly maintain all drainage facilities and
wheel washing facilities on site;
-
Exposed slopes should be covered up properly if
no temporary work will be conducted;
-
Suppress dust generated from excavation,
breaking and drilling activities, haul road traffic and grout mixing process;
-
Quieter powered mechanical equipment should be
used;
-
Closely check and replace the sound insulation
materials wrapped at the concrete breaker tip regularly;
-
Better scheduling of construction works to
minimize noise nuisance; and
-
Tree protective measures for all retained trees
should be well maintained.
5.3
Monitoring Schedule for the Coming Month
5.3.1
The tentative schedule for environmental
monitoring in January
2014 is provided in Appendix F.
6.1.1
The construction phase and EM&A programme
of Stage 1 of the project commenced on 23 November 2009.
6.1.2
1-hour TSP, 24-hour TSP and noise monitoring
were carried out in the reporting period.
6.1.3
All 1-hour and 24-hour TSP monitoring results
complied with the Action / Limit Levels in the reporting period.
6.1.4
No Action and Limit Level exceedance for
construction noise was recorded at all monitoring stations in the reporting
month.
6.1.5
Environmental site inspection was carried out 9 times
in December 2013.
Recommendations on remedial actions were given to the Contractors for the
deficiencies identified during the site audits.
6.1.6 Two (2)
complaints were followed up by the Environmental Team in the reporting period.
6.1.7 One (1)
noise-related complaint was received on 4 November 2013 and followed up by the
Environmental Team in November and December 2013. The summary of investigation
is described in Sections 4.6.3 to 4.6.5.
6.1.8 One (1)
air-related complaint was received on 13 December 2013 and followed up by the
Environmental Team in December 2013. The summary of investigation is described
in Sections 4.6.6 to 4.6.8
6.1.9 No new
notification of summons and prosecution was received in the reporting period.
6.2.1
According to the
environmental site inspections performed in the reporting month, the following
recommendations were provided:-
Air Quality
Impact
l The soil stockpiles should be
properly covered.
l The grouting
station should be properly sheltered as one of the dust control measures
Construction
Noise Impact
l Properly erect the temporary
noise barriers in accordance with the Environmental Permit requirement.
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.
Water Quality
Impact
l Preventive measures should be
implemented to avoid the spread of mud trails on the public road.
l Silty effluent should be
treated/desilted before discharged. Untreated effluent should be prevented from
entering public drain channel.
l Proper drainage channels/bunds
should be provided at the site boundaries to collect/intercept the surface
run-off from works areas.
l Stagnant water accumulated
within works area should be removed.
Chemical and
Waste Management
l C&D materials and wastes,
general refuse should be sorted properly and removed timely.
l All chemical containers and oil
drums should be properly stored.
l All plants and vehicles on site
should be properly maintained to prevent oil leakage.
l All drain holes of the drip
trays utilized within works areas should be properly plugged to avoid any oil
leakage.
l Oil stains on soil surface and
empty chemical containers should be cleared and disposed of as chemical waste.
l Drip tray should be provided to prevent oil
leakage.
l Only the recycling materials
should be dumped into the appropriate recycling bins.
Landscape and
Visual Impact
l All retained trees should be
properly fenced off at the works area.
