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 March 2014. 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 January
2014.
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
-
Retaining wall construction
-
Noise barrier footing construction
-
Noise barrier panels installation
-
Asphalt laying
-
Installation of Drainage Pipes
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 barriers / semi-noise enclosures
-
Slope works, including installation of soil
nails
-
Noise barrier construction
-
Modification of existing bridge structures
-
Entrusted watermains
works
-
Sewer Installation
-
Road and drainage works
-
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 13
January 2014 and followed up by the Environmental Team in January 2014. The summary
of investigation is described in Sections 4.6.3 to 4.6.5.
One (1) air-and¨Cwater related complaint was received on 21
January 2014 and followed up by the Environmental Team in January 2014. The summary
of investigation is described in Sections 4.6.6 to 4.6.8.
One (1) air-related follow-up complaint was received on
22 January 2014 and followed up by the Environmental Team in January 2014. The
summary of investigation is described in Sections 4.6.9 to 4.6.11.
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 March
2014; while the construction works of Stage 2 commenced on 21 November 2013. 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 fifty-first 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 January 2014.
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
-
Retaining wall construction
-
Noise barrier footing construction
-
Noise barrier panels installation
-
Asphalt laying
-
Installation of Drainage Pipes
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 barriers / semi-noise enclosures
-
Slope works, including installation of soil
nails
-
Noise barrier construction
-
Modification of existing bridge structures
-
Entrusted watermains
works
-
Sewer Installation
-
Road and drainage works
-
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 January
2014 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
|
81.6
|
74.6 ¨C 87.2
|
302.1
|
500
|
|
AM2
|
83.0
|
80.9 ¨C 86.3
|
301.9
|
500
|
|
AM3
|
82.0
|
78.4 ¨C 86.3
|
301.9
|
500
|
|
AM4A
|
82.5
|
78.5 ¨C 86.4
|
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
|
70.5
|
32.2 ¨C 119.6
|
176.6
|
260
|
|
AM2
|
59.7
|
31.0 ¨C 121.8
|
178.6
|
260
|
|
AM3
|
55.3
|
7.7 ¨C 118.7
|
193.1
|
260
|
|
AM4A
|
73.8
|
17.3 ¨C 130.3
|
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 January 2014 from the Tai Mei Tuk Automatic
Weather Station were missing, the weather data from Tai Po Automatic Weather
Station in January 2014 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 January
2014 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
|
61.7
|
60.3 ¨C 63.3
|
75
|
|
NM2
|
65.6
|
64.1 ¨C 67.3
|
75
|
|
NM3
|
62.6
|
61.4 ¨C 63.7
|
70/65#
|
|
NM4
|
63.9
|
62.0 ¨C 66.1
|
75
|
|
NM5
|
62.8
|
53.7 ¨C 64.1
|
75
|
|
NM6
|
62.7*
|
62.0 ¨C 63.4*
|
70#
|
|
NM7
|
58.3
|
57.7 ¨C 58.8
|
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, 5 site
inspections were carried out on 3, 8, 15, 22 and 28 January 2014 for Contract 1 of
the Project, and 4 site inspections for Contract 2 of the Project were carried
out on 10, 16, 23 and 29 January 2014.
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 surfaces were observed on access roads near
the site exit. The Contractor was reminded to spray water to maintain the
entire surface wet and wash the wheels of vehicles before leaving the
construction site.
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 clear the construction
waste at the waste skip.
Landscape and Visual Impact
4.1.8
No adverse observation was identified in the
reporting month.
Miscellaneous
4.1.9
The Contractor was reminded to clear the
stagnant water at the drip tray so as to prevent mosquito breeding.
4.1.10 Particular
observations and reminder during the site inspections for Contract 2 are
described below:
Air Quality
4.1.11
No adverse observation was identified in the
reporting month.
Noise
4.1.12
The Contractor was reminded to wrap the breaker
properly with sound-absorptive materials.
Water Quality
4.1.13
The Contractor was reminded to clear the muddy
water at the wheel-washing facilities in Shek Kwu
Lung.
Chemical and Waste Management
4.1.14
The Contractor was reminded to clear the refuse
at the waste skip at G40A.
4.1.15
The Contractor was reminded to provide a drip
tray to the chemical container on Lam Kam Flyover or remove the chemical
container.
4.1.16
The Contractor was reminded to clear the
general refuse inside and next to the rubbish bin.
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),
189m3 of inert
C&D materials was disposed of to the public fill at Tuen
Mun 38 (of which 8m3 was broken concrete), while
163m3
of general refuse was disposed of at the NENT landfill. 84kg of
paper/cardboard packaging, 3,652kg of plastics and 0kg of metals were collected by recycling contractors in the
reporting month. 1,933m3 and 566m3 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), 150m3
of inert C&D materials was disposed of to Tuen Mun 38 and 225m3 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. 0m3
and 260m3 of inert C&D materials were reused on site and reused
in other projects respectively 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-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-RN0766-13
|
14/12/2013
|
23/02/2014
|
CSHK
|
Road Paving on Tolo
Highway between Ma Wo and NLKRB
(Shatin 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-RN0812-13
|
03/01/2014
|
25/03/2014
|
CSHK
|
Sign Gantry at Tolo
Highway between Yuen Chau Tsai and Ma Wo
|
|
GW-RN0815-13
|
04/01/2014
|
23/02/2014
|
CSHK
|
Road Marking Alternation at Tolo Highway between Ma Wo and
The Paragon
(Fanling Bound)
|
|
GW-RN0819-13
|
06/01/2014
|
28/02/2014
|
CSHK
|
Road Pavement at Island House on
Normal Weekdays
|
|
GW-RN0822-13
|
11/01/2014
|
23/02/2014
|
CSHK
|
Road Paving on Tolo
Highway between Grand Dynasty and The Paragon
(Shatin
Bound)
|
|
GW-RN0016-14
|
16/01/2014
|
28/02/2014
|
CSHK
|
Road pavement for Slip Road from Tolo Highway
to Tai Po Road near Yuen Chau Tsai
(Fanling Bound)
|
|
GW-RN0025-14
|
17/01/2014
|
28/02/2014
|
CSHK
|
Road Pavement at Tolo Highway
between Wan Tau Tong Estate and Tai Po Road
(Shatin Bound)
|
|
GW-RN0030-14
|
21/01/2014
|
28/02/2014
|
CSHK
|
Installation of Sign Gantries G18
|
|
GW-RN0031-14
|
23/01/2014
|
01/03/2014
|
CSHK
|
Road Resurfacing on Tolo Highway
between Ma Wo and Tai Po Road
(Fanling Bound)
|
|
GW-RN0039-14
|
27/01/2014
|
26/07/2014
|
CSHK
|
Construction wroks
at Island House Interchange
|
|
GW-RN0058-14
|
29/01/2014
|
01/03/2014
|
CSHK
|
Modification of Sign Gantries_G13-17,
66-68 & 70
|
|
GW-RN0064-14
|
29/01/2014
|
01/03/2014
|
CSHK
|
Installation of Noise Barrier on
Kwong Fuk West Viaduct
|
|
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-RN0758-13
|
12/12/2013
|
27/02/2014
|
GCL
|
General Works at a section of Tolo Highway near Parc
Versailles
|
|
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
|
|
GW-RN0817-13
|
04/01/2014
|
28/02/2014
|
GCL
|
Renewal of
GW-RN0637-13
Erection of Sign Gantry at a section of Tai Po Tai Wo
Road Uphill to Tolo Highway Northbound near Shek Kwu Lung
|
|
GW-RN0006-14
|
12/01/2014
|
23/02/2014
|
GCL
|
Lane Shifting at Tolo Highway CH19.8 - 17.95A near Ma Wo
|
|
GW-RN0018-14
|
15/01/2014
|
28/02/2014
|
GCL
|
Lane Shifting Works
and Modification of Road Marking at Tolo Highway
CH19.9 to CH20.3B
|
|
GW-RN0022-14
|
17/01/2014
|
29/03/2014
|
GCL
|
Installation of
Sign Gantry G26 at Tolo Highway (Fanling Bound) CH19.55 to CH19.65B
|
|
GW-RN0023-14
|
18/01/2014
|
28/02/2014
|
GCL
|
Installation of
Sign Gantry G25 at Tolo Highway (Fanling Bound) CH19.3 to CH19.5B
|
|
GW-RN0037-14
|
28/01/2014
|
12/04/2014
|
GCL
|
Erection of Sign
Gantry G29 at Lam Kam Flyover (Fanling Bound) from
CH21.0 to CH21.2B
|
|
GW-RN0052-14
|
26/01/2014
|
23/02/2014
|
GCL
|
Road Sections of Tolo Highway (South Bound) between Shek Kwu Lung and Dynasty View, Tai Po, New Territories
|
|
GW-RN0057-14
|
29/01/2014
|
28/02/2014
|
GCL
|
Tolo
Highway (Fanling Bound) near Mun
Shue Hang, Tai Po, New Territories
|
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) new complaints and one (1) follow-up
complaint were followed up by the Environmental Team in the reporting period.
4.6.3
One (1) noise-related complaint was received on
13 January 2014 and followed up by the Environmental Team in January 2014. The
summary of investigation is described in Sections 4.6.3 to 4.6.5.
4.6.4
EPD referred a noise complaint on 13 January
2014 from a resident living in Grand Palisades at Tai Po. The complainant
complained about the persistent construction noise emitted between late-night
hours on Saturdays and early morning of Sundays at[n1] [n2]
Tolo Highway.
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[n3] ,
road resurfacing works were carried out at Tolo
Highway over Shan Tong Road between 23:00 on 11 January 2014 and 07:00 on 12
January 2014.
A valid
Construction Noise Permit (CNP no.: GW-RN0815-13) has been obtained for the use
of certain specified Powered Mechanical Equipments (PMEs) and carrying out of
certain prescribed construction work at Tolo Highway
(Fanling Bound) between The Balmoral
and The Paragon near Tat Wan Road between 23:00 on Saturdays and 07:00 on
Sundays, subject to the conditions imposed in the CNP. All restricted hours
works were supervised by senior staff of the Contractor and Representatives of
the Engineer to ensure all CNP conditions were complied with. The list of
plants used during the construction works (provided by the Contractor and
confirmed by the Engineer) on 11 and 12 January 2014 was checked for
verification.
Notification had
been sent to the EPD on 9 January 2014 prior to the commencement of
construction works before the said works was carried out at 23:00 on 11 January
2014.
Other Advance
Notifications of Restricted-hour Construction Work to the EPD have also been
attached since the complaint is concerned with persistent construction noise emitted. The notifications were
sent to the EPD 2 days prior to the commencement of the said works.
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 6 November 2013.
The warning
buzzer of the road miller used between 23:00 on 11 January 2014 and 00:30 on 12
January 2014 was enclosed that night to reduce noise impacts from the road
resurfacing works.
However, the
noise complaint is considered project-related.
Upon the receipt
of the complaint, there has not been road resurfacing works under the CNP no.:
GW-RN0815-13 being arranged at the same location at night since 11 and 12
January 2014.
Moreover, the
Contractor was urged to shorten the time of handling rubbles as much as
possible to minimize nuisance caused to the nearby residents. The Contractor has
been setting up permanent noise barriers at both sides of the section of the road
where road resurfacing works were carried out. Most of the noise barriers have
been erected. The Contractor was prompted to install the remaining permanent
noise barriers as soon as it can.
The Contractor
met Mr Chan Siu-kuen, The
Tai Po District Council Member, in the morning of 13 January 2014 to explain
their works and progress. Mr Chan agreed to contact
the complainant and the complainant has been satisfied with Mr
Chan¡¯s explanations.
According to the
Contractor, no further works in relation to CNP no.: GW-RN0607-13 is scheduled before
the CNP expires at 07:00 on 23 February 2014, even though the CNP permits such
prescribed use of the specified PMEs for a total of 6 nights during its
validity period.
There are still
outstanding works to be carried out at night in the coming months before the
South Bound of Tolo Highway is open. However, the
works will be less frequent and cause less impacts compared to those in
previous months. The Contractor was urged to comply with conditions of existing
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-and¨Cwater related complaint was
received on 21 January 2014 and followed up by the Environmental Team in
January 2014.
4.6.7
EPD referred a complaint on 21 January 2014.
The
complainant drove via Tai Po Tai Wo Road section of Tolo Highway on 21 January 2014 morning. He observed a lot
of muddy water generated from the Tolo Highway
widening construction works. Besides, he saw from Google Earth Image Satellite
that a pipe was used to draw water for ground washing, causing the outflow of
muddy runoff. As the mud on the road becomes dry, dust is generated when
vehicles are passing by.
The complainant requests
follow-up as soon as possible.
4.6.8
As informed by the Contractor (Gammon
Construction Ltd) and confirmed by the Engineer of the Project, concrete
breaking at Bridge 15A North abutment was carried out at the work areas from
8:30am to 5:30pm on 21 January 2014.
Mitigation
measures have been implemented in relation to water quality impact when
construction activities are carried out. The measures include ensuring the
works areas are well paved by concrete and keeping the paved area clean by
sweeping to prevent mud and debris from depositing on the paved area. Besides,
temporary channels are set up to control runoff.
Mitigation
measures have been implemented in relation to dust control when construction
activities are carried out. The measures include ensuring the works areas are
well paved by concrete, wetting the breaking surfaces regularly for dust
suppression of concrete breaking works and providing wheel washing of vehicles
before vehicles leave the construction site.
With reference to
the monitoring results recorded on the day closest to the day of complaint at
the nearest EM&A monitoring station (AM4A- 168 Shek Kwu
Lung Village), the 24-hour TSP level on 22 January 2014 was 96.1
ug/m3, which is below the action level of 176.6
ug/m3. Besides, the average 1-hour TSP level on 22
January 2014 at AM4A was 85.8 ug/m3,
which is also below the action level of 302.3ug/m3.
The complaint was
received by the Contractor at around 2:15pm on 21 January 2014 and site
inspection was immediately carried out at 3 pm on the same day. Inspection was
conducted along the concerned carriageway and no muddy water or mud trails were
observed on both the carriageway and access gates. Moreover, referring to the
complainant¡¯s description, the Google earth image was capturing the condition
in April 2011, which is deviated from the current site situation. Although no
muddy water was observed on 21 January 2014 afternoon, the Contractor was urged
to monitor the road surfaces regularly and rectify whenever muddy water is observed
by sweeping to prevent mud and debris from depositing on paved road areas.
Nevertheless, the
complaint was considered project-related.
Therefore, the
Contractor is reminded to enhance the water quality impacts and dust mitigation
measures as stated in the ¡°Recommended Mitigation Measures¡± below:
-
Rectify the muddy water overflowing
and propose preventive measures for muddy runoff;
-
Review the methodology of collecting
the wheel washing water to prevent recurrence in the future;
-
Confirm
the implementation of dust mitigation measures during all construction and
dusty activities to minimize fugitive dust generation;
-
Maintain the frequency of
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 are carried out; and
-
Foster better public relations with
the sensitive receivers and complainants nearby.
4.6.9
One (1) air-related follow-up complaint was
received on 22 January 2014 and followed up by the Environmental Team in
January 2014.
4.6.10
EPD referred a follow-up complaint from a
resident of Ma Wo on 22 January 2014. The complaint
is about the dust emission at the construction site of the Tolo
Highway widening construction works at Ma Wo on 21
January 2014 afternoon and 22 January 2014 morning. The complainant complained
that there was insufficient water spraying and tarpaulin sheets were not used.
He expressed that the air pollution problem has caused nuisance to him for
three years. He requests improvements by the Contractor and follow-up by the
EPD.
4.6.11
As informed by the Contractor (Gammon
Construction Ltd) and confirmed by the Engineer of the Project, slope trimming
and U-channel construction were carried out in work area W36, and slope
trimming was carried out in work areas W39-W40 on 21 and 22 January 2014.
The
following mitigation measures have been done by the Contractor. The loading and
unloading height of general fill materials was kept to a minimum. Wheel washing
has been carried out at the site entrance. There have been 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. 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. Besides, in case any dump
truck passes through W45-47, the mechanical covering will not open until they
reach the unloading point.
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 21 January 2014 was
123.0 ug/m3, which was below
the action level of 176.6 ug/m3. Besides, the average
1-hour TSP level 21 January 2014 at AM1A- Sheung Wun Yiu was 87.3 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 the 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.
4.6.12
No new notification of summons and prosecution
was received in the reporting period.
4.6.13
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 February 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 February 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 barriers / semi-noise enclosures
-
Slope works, including installation of soil
nails
-
Noise barrier construction
-
Modification of existing bridge structures
-
Entrusted watermains
works
-
Sewer Installation
-
Road and drainage works
-
Landscaping works
5.2
Key Issues for the Coming Month
5.2.1
Key issues to be considered in February 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 February
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 January
2014. Recommendations on remedial actions were given to the
Contractors for the deficiencies identified during the site audits.
6.1.6
Two (2) new complaints and one (1) follow-up
complaint were followed up by the Environmental Team in the reporting period.
6.1.7
One (1) noise-related complaint was received on
13 January 2014 and followed up by the Environmental Team in January 2014. The
summary of investigation is described in Sections 4.6.3 to 4.6.5.
6.1.8
One (1) air-and¨Cwater related complaint was
received on 21 January 2014 and followed up by the Environmental Team in
January 2014. The summary of investigation is described in Sections 4.6.6 to
4.6.10.
6.1.9
One (1) air-related follow-up complaint was
received on 22 January 2014 and followed up by the Environmental Team in
January 2014. The summary of investigation will be described in the next
reporting month.
6.1.10
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.
