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 VEP (EP-324/2008/B) was subsequently granted on 17 March 2014 which
superseded the previous EP (EP-324/2008/A). The most recent variation of the EP does not cover Stage 1
(between Island House Interchange and Tai Hang) of the Project.
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 September 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 July 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;
-
Asphalt laying;
-
Installation of drainage pipes; and
-
Landscape softworks.
The
construction works carried out by the Contract 2
Contractor (Gammon Construction Ltd.) in the reporting period were:-
-
Temporary traffic arrangements;
-
Slope outstanding and remedial works;
-
Noise barrier outstanding and remedial works;
-
Entrusted watermains
works;
-
Road and drainage outstanding and remedial
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) water-related complaint was received on 23 June
2014 and followed up by the Environmental Team in June and the reporting month.
The summary of the follow-up site visits carried out on 25 June 2014 and 9 July
2014 is reported in Section 4.6.
No complaint, 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
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 VEP
(EP-324/2008/B) was subsequently granted on 17 March 2014 which superseded the
previous EP (EP-324/2008/A). The most recent variation of the EP does not cover
Stage 1 (between Island House Interchange and Tai Hang) of the Project.
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 July
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-seventh 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 July 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
|
|
Jimmy Tsang
|
9720
9738
|
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;
-
Asphalt laying;
-
Installation of drainage pipes; and
-
Landscape softworks.
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:-
-
Temporary traffic arrangements;
-
Slope outstanding and remedial works;
-
Noise barrier outstanding and remedial works;
-
Entrusted watermains
works;
-
Road and drainage outstanding and remedial
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 will be conducted for at least
three times every 6 days; while impact 24-hour TSP monitoring will be 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 and Frequency
|
Parameter
|
Frequency
|
|
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 July
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
|
80.4
|
75.1 ¨C 85.9
|
302.1
|
500
|
|
AM2
|
79.4
|
74.9 ¨C 86.2
|
301.9
|
500
|
|
AM3
|
78.9
|
73.9 ¨C 84.9
|
301.9
|
500
|
|
AM4A
|
78.7
|
73.8 ¨C 86.7
|
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
|
36.0
|
20.2 ¨C 63.4
|
176.6
|
260
|
|
AM2
|
20.9
|
12.0 ¨C 34.9
|
178.6
|
260
|
|
AM3
|
34.8
|
18.4 ¨C 63.6
|
193.1
|
260
|
|
AM4A
|
21.5
|
9.3 ¨C 30.1
|
198.5
|
260
|
2.8.2
Construction Phase EM&A Programme
for Contract 1 of the Project was completed on 15 July 2014. No monitoring has
been carried out at AM1A, AM2 and AM3 beyond 15 July 2014. Thus, the average
and range of the reporting month for AM1A, AM2 and AM3, respectively, are
calculated based on the results obtained on 4, 9 and 15 July 2014 only.
2.8.3
The major dust source in the reporting period
included construction activities from Stage 1 of the Project, as well as nearby
traffic emissions.
2.8.4
All 1-hour and 24-hour TSP results were below
the Action and Limit Level at all monitoring locations in the reporting month.
2.8.5
The event action plan is annexed in Appendix J.
2.8.6
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 July 2014 from the Tai Mei Tuk Automatic Weather
Station were missing, the weather data from Tai Po Automatic Weather Station in
July 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 2250
|
|
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 and Frequency
|
Parameter
|
Frequency
|
|
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 July
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
|
62.8
|
62.0 ¨C 64.0
|
75
|
|
NM2
|
66.6
|
63.7 ¨C 67.8
|
75
|
|
NM3
|
62.6
|
61.3 ¨C 63.3
|
70/65#
|
|
NM4
|
64.9
|
63.7 ¨C 65.7
|
75
|
|
NM5
|
62.2
|
53.7 ¨C 63.7
|
75
|
|
NM6
|
63.5*
|
62.1 ¨C 64.1*
|
70#
|
|
NM7
|
60.9
|
48.2 ¨C 64.7
|
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
Construction Phase EM&A Programme
for Contract 1 of the Project was completed on 15 July 2014. No monitoring has
been carried out at NM 2, NM3, NM4, NM5, NM6 and NM7 beyond 15 July 2014. Thus,
the average and range of the reporting month for at NM 2, NM3, NM4, NM5, NM6
and NM7, respectively, are calculated based on the results obtained on 4, 9 and
15 July 2014 only.
3.7.3
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.
3.7.4
No noise monitoring result exceeding the Limit
Level was recorded at all monitoring stations in the reporting month.
3.7.5
Major noise sources during the noise monitoring
included construction activities of Stage 1 of the Project and nearby traffic
noise and general school activities.
3.7.6
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. Since Construction
Phase EM&A Programme for Contract 1 of the
Project was completed on 15 July 2014, no weekly site inspection has been
carried out beyond 15 July 2014.
4.1.2
In the reporting month, 2 site inspections were carried out
on 2 and 9 July 2014 for Contract 1 of the Project, and 5 site inspections for
Contract 2 of the Project were carried out on 3, 10, 17, 24 and 31 July 2014.
4.1.3 The
environmental site inspections summaries are provided in Appendix K.
4.1.4
Particular observations during the site inspections for
Contract 1 are described below:
Air Quality
4.1.5
No adverse observation was identified in the
reporting month.
Noise
4.1.6
No adverse observation was identified in the
reporting month.
Water Quality
4.1.7
No adverse observation was identified in the
reporting month.
Chemical and Waste Management
4.1.8
No adverse observation was identified in the
reporting month.
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
Exposed slopes were observed without dust
suppression measures. The Contractor was reminded to cover the slopes after
work for rainstorm protection. (Reminder)
4.1.13
Exposed slope was observed. The Contractor
should cover the exposed slope for rainstorm protection by impervious sheeting.
4.1.14
Open stockpiles were observed without dust
suppression measures. The Contractor should cover the stockpiles with tarpaulin
sheets or carry out equivalent dust suppression measures.
Noise
4.1.15
No adverse observation was identified in the
reporting month.
Water Quality
4.1.16
Mud was observed on the footpath. The
Contractor should clear the mud regularly.
Chemical and Waste Management
4.1.17
Stagnant water and general refuse were observed
on Bridge 18A. The Contractor should clear the stagnant water to prevent
mosquito breeding and clear the refuse to maintain site cleanliness.
4.1.18
General refuse was observed. The Contractor
should clear the general refuse to maintain site tidiness.
Landscape and Visual Impact
4.1.19
No adverse observation was identified in the
reporting month.
Miscellaneous
4.1.20
Stagnant water and general refuse were observed
on Bridge 18A. The Contractor should clear the stagnant water to prevent
mosquito breeding and clear the refuse to maintain site cleanliness.
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),
32m3 of inert
C&D materials was disposed of to the public fill at Tuen
Mun 38 (of which 0m3 was broken concrete), while
72m3 of general refuse was disposed of at the NENT landfill. 65kg of
paper/cardboard packaging, 4,553kg of plastics and 0kg of metals were collected by recycling contractors in the
reporting month. 565m3 and 0m3 of inert
C&D materials were reused on site and reused in other projects 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), 30m3
of inert C&D materials was disposed of to Tuen Mun 38 and 160m3 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 0m3 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 Contractors have been advised to maintain
on site waste sorting and recording system, and maximize the reuse / recycling
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/B
|
17/03/2014
|
N/A
|
HyD
|
Tolo Highway/Fanling
Highway between Island House Interchange and Ma Wo
The VEP (EP-324/2008/B) was granted on 17 March 2014 which superseded
the previous EP (EP-324/2008/A).
|
|
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-RN0039-14
|
27/01/2014
|
26/07/2014
|
CSHK
|
Construction wroks at Island House Interchange
|
|
GW-RN0210-14
|
11/04/2014
|
09/10/2014
|
CSHK
|
Modification of
Sign Gantries G13, 16, 66 & 70
|
|
GW-RN0320-14
|
04/06/2014
|
30/08/2014
|
CSHK
|
Noise Barrier
Installation Works on Tolo Highway
|
|
GW-RN0336-14
|
30/05/2014
|
30/09/2014
|
CSHK
|
Construction wroks at Island House Interchange
|
|
GW-RN0341-14
|
04/06/2014
|
30/08/2014
|
CSHK
|
Road Re-pavement at
Tolo Highway Between Yuen Chau Tsai and Ma Wo
|
|
GW-RN0347-14
|
08/06/2014
|
17/08/2014
|
CSHK
|
Road pavement for
Slip Road N
|
|
GW-RN0352-14
|
01/06/2014
|
27/07/2014
|
CSHK
|
Installation of
Noise Barrier on Slip Road to Tat Wan Road
|
|
GW-RN0372-14
|
17/06/2014
|
31/07/2014
|
CSHK
|
Road pavement for
Slip Road C
|
|
GW-RN0373-14
|
17/06/2014
|
31/07/2014
|
CSHK
|
Road pavement for
Slip Road D
|
|
GW-RN0389-14
|
29/06/2014
|
31/08/2014
|
CSHK
|
Road Paving Works
at Slip Road L
|
|
GW-RN0390-14
|
26/06/2014
|
30/08/2014
|
CSHK
|
Paving and Road
Marking for Slip Road A
|
|
GW-RN0398-14
|
03/07/2014
|
30/08/2014
|
CSHK
|
Installation of
Noise Barrier on Kwong Fuk
West Viaduct
|
|
GW-RN0080-14
|
07/02/2014
|
02/08/2014
|
GCL
|
(Renewal of
GW-RN0530-13) General Works at a section of Tolo
Highway near Tai Po Tau Raw Water Pumping Station
|
|
GW-RN0293-14
|
11/05/2014
|
20/07/2014
|
GCL
|
Lane shifting and
modification of road marking at Tolo Highway (South
Bound) CH21.1 to 20.8 A/B near Lam Kam Flyover
|
|
GW-RN0313-14
|
17/05/2014
|
09/07/2014
|
GCL
|
Road
Re-construction at Tolo Highway CH17.96 to CH21.0
Northbound near Fanling Highway
|
|
GW-RN0314-14
|
31/05/2014
|
09/08/2014
|
GCL
|
Road reconstruction
at a section between Lam Kam Interchange and Tai Wo
Service Road West (Stage 1 & 2) near Fanling
Highway Slip Road
|
|
GW-RN0319-14
|
21/05/2014
|
29/07/2014
|
GCL
|
Renewal of
GW-RN0115-14
Maintenance works at Tolo Highway and Fanling Highway near Tai Po Tai Wo
Road, Lam Kam Interchange and TWSRW
|
|
GW-RN0337-14
|
28/05/2014
|
09/08/2014
|
GCL
|
Road reconstruction
at Tolo Highway CH21 to CH17.96 South bound near Fanling Highway
|
|
GW-RN0412-14
|
04/07/2014
|
03/09/2014
|
GCL
|
Renewal of GW-RN0225-14 for road reconstruction at 2
sections of Tolo Highway (Shatin
and Fanling Bound)
|
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
One (1) water-related complaint was received on
23 June 2014 and followed up by the Environmental Team in June and the
reporting month. The summary of the follow-up site visits carried out on 25
June 2014 and 9 July 2014 is reported as follows.
4.6.3
A follow-up site visit was made on 25 June 2014
to audit the condition of the complained construction site and check the
implementation status of rectification measures.
4.6.4
During the follow-up visit on 25 June 2014
morning, no works were observed under W10 and Bridge 11A (opposite to Hong Kong
Teachers' Association Lee Heng Kwei Secondary
School). Several rectification measures were implemented:
-
Slopes were covered to prevent soil erosion by
rainfall;
-
Sand bags were laid in the U-channel to form
silt traps to improve the quality of surface runoff;
-
Sand bags were laid at low-lying areas where
muddy water easily deposits to prevent muddy water from flowing out from the
site area to Tai Po River and nearby areas;
4.6.5
On the day of the follow-up site visit, it was
raining. The Contractor was reminded to clear the blockage of the U-channel
right after the rain as a remedial action.
4.6.6
The Contractor was further reminded to clear
the deposited mud upstream of the sand bags, both placed in the U-channel and
at low-lying areas, regularly.
4.6.7
During the visit, conditions of Tai Po River,
upstream and downstream of the outfall opposite to Lee Heng Kwei
Secondary School, were observed. It was observed that the colours
of river water upstream and downstream were similar.
4.6.8
With the implementation of muddy water control
measures under W10 and Bridge 11A, no muddy water was observed from the
complained outfall on the day of follow-up site visit.
4.6.9
A follow-up site visit was further made on 9
July 2014 to confirm that the deposited mud upstream of the sand bags has been
cleared, audit the condition of the complained construction site and check the
implementation status of rectification measures.
4.6.10
During the follow-up visit on 9 July 2014
morning, no works were observed under W10 and Bridge 11A (opposite to Hong Kong
Teachers' Association Lee Heng Kwei Secondary
School). Several rectification measures were implemented:
-
Water pumps were used to pump water in the
catch pits to sedimentation tanks, with one especially placed in the catch pit
which leads to the complained outfall;
-
The slope along the U-channel was reinforced
with concrete to prevent eroded soil from washing into the U-channel;
-
The mud in the U-channel was constantly cleared
to prevent the overflowing of muddy runoff; and
-
The deposited mud upstream of the sand bags was
cleared.
4.6.11
With the implementation of muddy water control
measures under W10 and Bridge 11A, no muddy water was observed from the
complained outfall.
4.6.12
No complaint, notification of summons and
successful prosecution was received in the reporting month. 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 August
2014 will
be:-
-
Asphalt laying; and
-
Landscape softworks.
5.1.2
The major construction works for Contract 2 in August 2014 will
be:-
-
Temporary traffic arrangements;
-
Slope outstanding and remedial works;
-
Noise barrier outstanding and remedial works;
-
Entrusted watermains
works;
-
Road and drainage outstanding and remedial
works; and
-
Landscaping works.
5.2
Key Issues for the Coming Month
5.2.1
Key issues to be considered in August 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 August 2014 is provided in Appendix F.
6.1.1
The construction phase EM&A programme of Stage 1 of the project commenced on 23
November 2009. The Construction Phase EM&A Programme for
Contract 1 of the Project was completed on 15 July 2014.
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 7 times in July 2014. Recommendations
on remedial actions were given to the Contractors for the deficiencies
identified during the site audits.
6.1.6
One (1) water-related complaint was received on
23 June 2014 and followed up by the Environmental Team in June and the
reporting month. The summary of the follow-up site visits carried out on 25
June 2014 and 9 July 2014 is reported in Section 4.6.
6.1.7
No new complaint, notification of summons or
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.
