EXECUTIVE
SUMMARY
The
proposed widening of Tolo Highway and Fanling Highway between Island House
Interchange and Fanling (the Project) is a Designated Project under the
Environmental Impact Assessment Ordinance (Cap. 499) (EIAO) and is governed by an Environmental Permit (EP-324/2008)(EP). The Project aims to widen Tolo Highway
and Fanling Highway
to dual 4-lane carriageway in order to alleviate the current traffic congestion
problems and to cope with the increasing transport demands to and from the
urban areas and also cross boundary traffic.
The
construction works for this Project will be delivered in 2 stages i.e. Stage 1
(between Island House Interchange and Tai Hang) and Stage 2 (between Tai Hang
and Wo Hop Shek Interchange). The construction works of Stage 1 were commenced
on 23 November 2009 and will tentatively be completed in December 2013; while
construction programme of Stage 2 is currently under review. This report
focuses on Stage 1 of the Project only.
The
construction phase of Stage 1 under the EP commenced on 23 November 2009.
The
EM&A programme for Stage 1 of the Project commenced on 23 November 2009.
The impact environmental monitoring and audit includes air quality and noise
monitoring.
This
report documents the findings of EM&A works conducted in the period between
1 and 28 February 2011. 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;
-
Bored piling;
-
Pipe pile wall construction;
-
Pile cap construction;
-
Bridge construction;
-
Tree felling and transplanting
of trees;
-
Installation of soil nails;
-
At-grade road construction;
-
Demolition of central dividers;
-
Retaining wall construction;
-
Demolition of bridges; and
-
Slope works.
The construction works carried out by the Contract 2 Contractor (Gammon Construction Ltd.) in the reporting
period were:
-
Excavation of trial trenches to
locate existing utilities;
-
Ground investigation and
predrilling;
-
Construction of haul road;
-
Extension of box culvert and
subway;
-
Piling and structural works of
bridges;
-
Construction of Pilecap /
Spread footing of Noise Barrier / Semi Noise Enclosure;
-
Slope works, including
installation of soil nails;
-
Entrusted watermains works;
-
Retaining wall construction;
-
Noise barrier construction; and
-
Modification of existing bridge
structures.
Reporting Change
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
noise complaint was followed up by Environmental Team in the reporting month,
hence no Action Level exceedance of noise was recorded.
No Limit Level exceedance of noise was recorded in the reporting
month.
Complaint,
Notification of Summons and Successful Prosecution
No environmental
complaint was followed up by Environmental Team in February 2011.
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 and waste
management;
-
Collection of construction
waste should be carried out regularly;
-
Site runoff should be
properly collected and treated prior to discharge;
-
Suppress dust generated
from excavation and drilling activities, and haul road traffic;
-
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
-
Properly maintain all
drainage faculties on site.
1
introduction
1.1.
Background
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 Hong Kong Island to Shenzhen. At present, this
section of Route 9 is dual 3-lane carriageway. However, at several major
interchanges along this section of Route 9, the highway is only dual-2 lane.
Severe congestion is a frequent occurrence during peak periods, particularly in
the Kowloon
bound direction.
1.1.2.
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).
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 December 2013; while construction
programme of Stage 2 is currently under review. This report
focuses on Stage 1 of the Project only.
1.1.6.
The construction works for Stage 1 of the
Project will be implemented under 2 works contracts (Contract 1 and Contract
2). Contract 1 covers the section of Tolo Highway
between Island House Interchange and Ma Wo, Contract 2 covers the section of Tolo Highway
between Ma Wo and Tai Hang.
1.1.7.
Hyder-Arup-Black and Veatch Joint Venture
(HABVJV) are appointed by Highways Department 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 Highways
Department as the Environmental Team to undertake the EM&A works for Stage
1 of the Project and Mott MacDonald Hong Kong Ltd. acts as the Independent
Environmental Checker (IEC) for the Contracts.
1.1.10.
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.
Scope
of Report
1.2.1.
This is the sixteenth monthly
Environmental Monitoring and Audit (EM&A) Report under the Agreement No. CE
20/2009 (EP) - Widening of Tolo
Highway between Island
House Interchange and Tai Hang – Investigation.
This report presents a summary of the environmental monitoring and audit
works, list of activities and mitigation measures proposed by the ET for Stage
1 of the Project in February 2011.
1.3.
Project
Organization
1.3.1. The project organization is shown in Appendix A. The key personnel
contact names and numbers are summarized in Table 1.1.
Table
1.1 Contact Information of Key
Personnel
|
Party
|
Position
|
Name
|
Telephone
|
Fax
|
|
ER of Stage 1, Contract 1
(Hyder-Arup-Black
& Veatch Joint Venture)
|
Chief Resident Engineer /TOLO1
|
James
Tsang
|
9038 8797
|
26674000
|
|
ER of Stage 1, Contract 2
(Hyder-Arup-Black
& Veatch Joint Venture)
|
Chief Resident Engineer /TOLO2
|
Paul Appleton
|
9097 5833
|
2653 2348
|
|
IEC of Stage 1
(Mott MacDonald Hong Kong Limited)
|
Independent
Environmental Checker
|
Terence Kong
|
2828 5919
|
2827 1823
|
|
Contractor of Stage 1, Contract 1
(China
State Construction Engineering (Hong Kong) Ltd.)
|
Site
Agent
|
David
Lau
|
9499 0818
|
2667 5666
|
|
Environmental Officer
|
Michael
Tsang
|
9277 4956
|
2667 5666
|
|
Contractor of Stage 1, Contract 2
(Gammon Construction Ltd.)
|
Site
Agent
|
Edmond
Chan
|
9483
8885
|
2559
3410
|
|
Environmental
Officer
|
Ir Thomson Chang
|
9213
6569
|
2559
3410
|
|
ET of Stage 1
(AECOM)
|
ET
Leader
|
Y T
Tang
|
2893 1551
|
2891 0305
|
1.4.
Summary
of Construction Works
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;
-
Bored piling;
-
Pipe pile wall construction;
-
Pile cap construction;
-
Bridge construction;
-
Tree felling and transplanting
of trees;
-
Installation of soil nails;
-
At-grade road construction;
-
Demolition of central dividers;
-
Retaining wall construction;
-
Demolition of bridges; and
-
Slope works.
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:
-
Excavation of trial trenches to
locate existing utilities;
-
Ground investigation and
predrilling;
-
Construction of haul road;
-
Extension of box culvert and
subway;
-
Piling and structural works of
bridges;
-
Construction of Pilecap /
Spread footing of Noise Barrier / Semi Noise Enclosure;
-
Slope works, including
installation of soil nails;
-
Entrusted watermains works;
-
Retaining wall construction;
-
Noise barrier construction; and
-
Modification of existing bridge
structures.
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 mitigation measures implementation schedule are presented in
Appendix C.
1.5.
Summary
of EM&A Programme Requirements
1.5.1. The EM&A programme required environmental monitoring for air
quality, noise and environmental site inspections for air 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
AIR QUALITY MONITORING
2.1
Monitoring Requirements
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
Monitoring Equipment
2.2
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)
|
|
High Volume Sampler
(24-hour TSP)
|
Tisch Total Suspended Particulate Mass Flow
Controlled High Volume Air Sampler (Model No. TE-5170)
|
2.3
Monitoring Locations
2.3
2.3.1
Monitoring locations AM2 and AM3 were set up at the
proposed locations in accordance with updated EM&A Manual.
2.3.2
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.
2.3.3
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
|
|
AM4
|
Tai Kwong
Secondary School
|
Roof of the
school
|
2.4
Monitoring Parameters,
Frequency and Duration
2.4
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
Monitoring Methodology
2.5
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)
No furnace or incinerator flues nearby.
(v)
Airflow around the sampler was unrestricted.
(vi)
Permission was obtained to set up the
samplers and access to the monitoring stations.
(vii)
A secured supply of electricity was obtained
to operate the samplers.
(viii)
The sampler was located more than 20 meters
from any dripline.
(ix)
Any wire fence and gate, required to protect
the sampler, did not obstruct the monitoring process.
(x)
Flow control accuracy was kept within ±2.5%
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
°C and not variable by more than ±3 °C; the relative humidity (RH) was < 50% and not
variable by more than ±5%. 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 February 2011
is provided in Appendix F.
2.7
Monitoring Results
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
Results and Observations
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 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
|
81.3
|
78.2 – 83.5
|
302.1
|
500
|
|
AM2
|
81.0
|
76.9 – 86.5
|
301.9
|
500
|
|
AM3
|
80.5
|
77.3 – 84.5
|
301.9
|
500
|
|
AM4
|
82.1
|
78.6 – 86.1
|
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
|
51.6
|
29.5 – 80.7
|
176.6
|
260
|
|
AM2
|
37.4
|
18.4 – 63.4
|
178.6
|
260
|
|
AM3
|
37.8
|
17.3 – 59.9
|
193.1
|
260
|
|
AM4
|
54.4
|
28.1 – 89.3
|
198.5
|
260
|
2.8.2
The major dust source in the reporting period included concrete
breaking, soil nail installation, excavation 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 February 2011 from the Tai Mei Tuk Automatic Weather Station
were missing, the weather data from Tai Po Automatic Weather Station in
February 2011 are included in Appendix H for supplementary purpose.
3
Noise MONITORING
3.1
Monitoring Requirements
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
|
B&K (Model
No. 2238)
|
|
Rion NL-31
|
|
Acoustic
Calibrator
|
B&K (Model
No. 4231)
|
|
Rion NC-73
|
3.3
Monitoring Locations
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. 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
|
|
NM1
|
Tai Kwong
Secondary School
|
1m from the exterior of the roof top façade
of the School
|
|
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
Monitoring Parameters,
Frequency and Duration
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
Monitoring Methodology
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 – 1900 on normal weekdays; Leq(5-minutes)
during restricted hours i.e. 19:00 – 23:00 and 23:00 – 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
Monitoring Schedule for the
Reporting Month
3.6.1
The schedule for environmental monitoring in February 2011
is provided in Appendix F.
3.7
Monitoring Results
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)
|
|
NM1
|
61.5
|
55.1 – 64.2
|
65/70#
|
|
NM2
|
61.7*
|
54.8 – 66.5*
|
75
|
|
NM3
|
61.0
|
56.5 – 64.8
|
65/70#
|
|
NM4
|
61.7
|
55.9 – 66.9
|
75
|
|
NM5
|
57.7
|
48.9 – 64.8
|
75
|
|
NM6
|
60.5*
|
51.2 – 65.1*
|
65/70#
|
|
NM7
|
60.0
|
56.8 – 64.4
|
75
|
*+3dB(A) Façade correction included
# Limit
Level of 65 dB(A) during school examination period
3.7.2
No noise monitoring result exceeding the Limit Level was
recorded at all monitoring stations in the reporting month.
3.7.3
Major noise sources during the noise monitoring included
construction activities of Stage 1 of the Project, nearby traffic noise and
general school activities.
3.7.4
No noise related complaint was followed up by Environmental
Team in the reporting period, hence no Action Level exceedance of noise was
recorded.
3.7.5
The event action plan is annexed in Appendix J.
4
ENVIRONMENTAL SITE INSPECTION AND AUDIT
4.1
Site Inspection
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, 3 site
inspections were carried out on 10, 16 and 24 February 2011 for Contract 1 of
the Project, and 4 site inspections for Contract 2 of the Project were carried
out on 1, 10, 17 and 24 February 2011.
4.1.2
The environmental site inspection 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
The bags of cement behind the grout mixer at Bridge 10A
were placed on ground without cover. The Contractor was reminded to cover the
bags of cement.
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
No adverse observation was identified in the reporting
month.
Landscape and Visual Impact
4.1.8
No adverse observation was identified in the reporting
month.
4.1.9
Particular observations during the site inspections for
Contract 2 are described below:
Air Quality
4.1.10
Mud trails were observed on ground at the vehicle site
entrance of W73. The Contractor was reminded to properly wash the vehicles
before they leave the site.
4.1.11
Cement powder was scattered on ground at Bridge 13A. The
Contractor was advised to clean up the cement powder and properly handle them
in the future.
4.1.12
Stockpiles of dusty material at Area B were not properly
covered. The Contractor was reminded to cover the stockpiles with tarpaulin
sheets.
Noise
4.1.13
No adverse observation was identified in the reporting
month.
Water Quality
4.1.14
Leaves were observed accumulated inside the u-channel at
W38. The Contractor was reminded to remove the leaves from the u-channel
regularly.
Chemical and Waste Management
4.1.15
Oil stain was observed underneath a boring machine near the
site entrance of W72B. The Contractor was reminded to clean up the oil stain
and provide a tarpaulin sheet underneath all the equipments requiring repair
and maintenance.
4.1.16
Non-inert C&D waste, general refuse and metal were
found mixed inside a waste skip in Area B. The Contractor was reminded to sort
the waste on site.
Landscape and Visual Impact
4.1.17
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), 286m3
of inert C&D material was disposed as public fill to Tuen Mun 38, while 52m3
of general refuse were disposed at NENT landfill, 19kg of metal, 158kg of paper/cardboard and
12kg of plastic were collected by recycling contractor in the reporting month.
76503m3 and 5290m3 of inert C&D materials were reused
on site and in NENT respectively.
4.2.3
As advised by the Contract 2 Contractor (GCL), 340m3
of inert C&D material were disposed to Tuen Mun 38 and 95m3 of
general refuse was disposed to NENT landfill 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
|
23/12/2008
|
N/A
|
HyD
|
Tolo
Highway/Fanling Hignway 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-RN0340-10
|
11/10/2010
|
10/4/2011
|
CSHK
|
Construction of W4
to W7
|
|
GW-RN0402-10
|
22/11/2010
|
10/4/2011
|
CSHK
|
Bored piling
|
|
GW-RN0426-10
|
13/12/2010
|
4/3/2011
|
CSHK
|
Construction of TB1
& TB2
|
|
GW-RN0443-10
|
24/12/2010
|
19/6/2011
|
CSHK
|
Construction of
Bridges over the Shan Tong Road and Tat Wan Road
|
|
GW-RN0014-11
|
20/1/2011
|
30/3/2011
|
CSHK
|
Loading &
Unloading Along Tolo Highway
|
|
GW-RN0013-11
|
19/1/2011
|
16/7/2011
|
CSHK
|
Works next to
MTRC’s Tracks
|
|
GW-RN0023-11
|
30/1/2011
|
27/3/2011
|
CSHK
|
Cutting trees along
Tolo Highway
|
|
GW-RN0026-11
|
26/1/2011
|
16/7/2011
|
CSHK
|
Construction of TB1
& TB2
|
|
GW-RN0286-10
|
31/08/2010
|
28/02/2011
|
GCL
|
Installation of
Safety Fence, Delivery of Plant & Materials, and Alternation of Road
Marking
|
|
PP-RN0028-10
|
10/11/2010
|
7/5/2011
|
GCL
|
Percussive Piling
|
4.4
Implementation
Status of Environmental Mitigation Measures
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 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
No noise related complaint was followed up by Environmental
Team in the reporting period, no Action Level exceedance of noise was recorded.
4.5.3
No monitoring Limit Level exceedance for noise 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
No environmental complaint was followed up by Environmental
Team in the reporting month.
4.6.3
No notification of summons and prosecution was received in
the reporting period.
4.6.4
Statistics on complaints, notifications of summons and
successful prosecutions are summarized in Appendix L.
5
FUTURE KEY ISSUES
5.1
Construction Programme for the
Coming Months
5.1.1
The major construction works for Contract 1 in March 2011
will be:
-
Temporary shoring, sheetpiling
and excavation;
-
Bored piling;
-
Pre-borded H-piles construction
-
Pipe pile wall construction;
-
Pile cap construction;
-
Bridge construction;
-
Tree felling and transplanting
of trees;
-
Installation of soil nails;
-
At-grade road construction;
-
Demolition of central dividers;
-
Retaining wall construction;
and
-
Slope works.
5.1.2
The major construction works for Contract 2 in March 2011
will be:
-
Excavation of trial trenches to
locate existing utilities;
-
Ground investigation and
predrilling;
-
Construction of haul road;
-
Extension of box culvert and
subway;
-
Piling and structural works of
bridges;
-
Construction of Pilecap /
Spread footing of Noise Barrier / Semi Noise Enclosure;
-
Slope works, including
installation of soil nails;
-
Entrusted watermains works;
-
Retaining wall construction;
-
Noise barrier construction; and
-
Modification of existing bridge
structures.
5.2
Key Issues for the Coming
Month
5.2.1
Key issues to be considered in March 2011:
-
Properly
store and label oils and chemicals on site;
-
Chemical and waste
management;
-
Collection of construction
waste should be carried out regularly;
-
Site runoff should be
properly collected and treated prior to discharge;
-
Suppress dust generated
from excavation and drilling activities, and haul road traffic;
-
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
-
Properly maintain all
drainage faculties on site.
5.3
Monitoring Schedule for the
Coming Month
5.3.1
The tentative schedule for environmental monitoring in
March 2011 is provided in Appendix F.
6
ConclusionS AND
RECOMMENDATIONS
6.1
Conclusions
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 TSP and 24-hour TSP monitoring results complied
with the Action / Limit Level.
6.1.4
No Action Level exceedance of noise was recorded, and no
Limit Level exceedance for noise was recorded at all monitoring stations in the
reporting month.
6.1.5
Environmental site inspection was carried out 7 times in
February 2011. Recommendations on remedial actions were given to the
Contractors for the deficiencies identified during the site audits.
6.1.6
No environmental complaint was followed up by Environmental
Team in the reporting period.
6.1.7
No notification of summons and prosecution was received in
the reporting period.
6.2
Recommendations
6.2.1
According to the environmental site inspection performed in
the reporting month, the following recommendations were provided:
Air
Quality Impact
l
All plants on site should be properly maintained to avoid dark smoke
emission.
l
All vehicles should be washed
to remove any dusty materials before leaving the site.
l
Haul roads should be
sufficiently dampened to minimize fugitive dust generation.
l
Wheel washing facilities should
be properly maintained to ensure properly functioning.
l
Temporary exposed slopes and
open stockpiles should be properly covered.
l
Enclosure should be erected for
cement mixing operations.
l
Ensure all vehicles to be
washed before leaving the site.
l
Provide water spraying to suppress fugitive dust for any dusty
construction activity.
Construction
Noise Impact
l
Properly erect the temporary
noise barriers in accordance with the Environmental Permit requirement.
l
Noise barriers should be
closely packed and properly aligned to ensure effective noise reduction.
l
Noisy operations should be
oriented to a direction away from sensitive receivers as far as possible.
l
Sound insulation materials
shall be wrapped at the
breaker tip for concrete breaking works.
l
Better scheduling of
construction works to minimize noise nuisance.
Water
Quality Impact
l
Stagnant water accumulated in drip trays should be removed.
l
Silt, debris and leaves
accumulated at public drains and perimeter u-channels should be cleaned up
regularly.
l
Silty effluent should be
treated/desilted before discharged. Untreated effluent should be prevented from
entering public drain channel.
Chemical
and Waste Management
l
C&D material should be sorted and removed timely.
l
All plants and vehicles on site
should be properly maintained to prevent oil leakage.
l
Oil stains on soil surface and empty chemical containers should be
cleared and disposed of as chemical waste.
Landscape
and Visual Impact
l
All retained trees should be properly fenced off at the works area.
