1 Introduction
1.1 Background
1.2 Baseline
Monitoring for the Contract
1.3 Structure of the Baseline Monitoring Report
2 aIR qUALITY
2.1 Monitoring Requirement
2.2 Monitoring Locations
2.3 Monitoring Equipment
2.4 Monitoring Parameters, Frequency and Duration
2.5 Monitoring Methodology and Quality Assurance/
Quality Control (QA/QC)
2.6 24 Hour TSP Monitoring
2.7 1 Hour TSP Monitoring
2.8 Baseline Monitoring Results
2.9 Action and Limit Level
3 nOISE
3.1 Monitoring Requirement
3.2 Monitoring Locations
3.3 Monitoring Equipment
3.4 Monitoring Parameters, Frequency and Duration
3.5 Monitoring Methodology
3.6 Maintenance and Calibration
3.7 Baseline Monitoring Results
3.8 Action
and Limit Levels
4 Water quality
4.1 Monitoring
Locations
4.2 Monitoring Parameters and Frequency
4.3 Monitoring Methodology
4.4 QA/QC Requirements
4.5 Baseline Monitoring Results
4.6 Action and Limit Levels
5 Ecology
5.1 Baseline Walk-over Survey
5.2 Baseline Dolphin Monitoring
5.3 Baseline
Bored Pilling Monitoring
6 Conclusion
Figure 1.1 Contract
Layout and Location of Monitoring Stations
Figure 5.1 Updated Habitat Map after Walk Over Survey
Figure 5.2 Layout of Transect Lines of
Dolphin Monitoring in Northwest and Northeast Lantau
Areas
Figure 5.3 Location of Pak Mong Station in NE Lantau with
alignment of TM-CLKL southern connection viaduct
Figure 5.4 Fix positions of vessels (green
dots) and dolphins (purple triangle) from Pak Mong
Theodolite Tracking Station in relation to TM-CLKL alignment and HKBCF/HKLR
reclamation sites in Sep 9th – Oct 14th 2013
Figure 5.5 Track lines of the only dolphin
group that was tracked and analyzed for movement and behavioural
patterns in the present study
Figure 5.6 Distribution of Chinese white
dolphin sightings in Northeast Lantau during January
2002 – December 2013
Figure 5.7 Distribution of Chinese white dolphin
sightings during TM-CLKL acoustic surveys (Sep 26th – Oct 25th
2013)
Figure 5.8 Location of the bored pile pier
sites to be monitored for the underwater noise measurement study of TM-CLKL
construction
Figure 5.9 Mean bandlevels
for the 122 recordings containing dolphin vocalizations
Figure 5.10 Mean bandlevels
for all 440 recordings as a function of time of day
Figure 5.11 Map showing the tentative
location of EAR deployments, pier sites to be monitored as well as pre-defined
route for dolphin acoustic behavioural study
Figure 5.12 The summed length of
recordings in minutes made for each day of observational effort during the
baseline acoustic monitoring in September – October 2013
Figure 5.13 Mean number of whistles per
minute and clicks per minute recorded as a function of dolphin behavioural state
Figure 5.14 Histogram of the percentage of
EAR recordings with dolphin detections made at site C1 (Bridge Alignment Area)
during 30 days of the deployment period
Figure 5.15 The number of dolphin
encounters and the mean encounter duration for each day recorded on the EAR at
site C1 (Bridge Alignment Area)
Figure 5.16 Histogram of the percentage of
EAR recordings at site C2 (near Lung Kwu Chau), with
dolphin detections made during 30 days of the deployment period
Figure 5.17 The number of dolphin
encounters and the mean encounter duration for each day recorded on the EAR at
site C2 (near Lung Kwu Chau)
Annex A1 Calibration Certificate for Air
Quality Monitoring Equipment
Annex A2 1-hour TSP Baseline Monitoring
Results
Annex A3 Graphical Presentation of
Baseline 1-hour TSP Levels
Annex A4 24-hour TSP Baseline Monitoring
Results
Annex A5 Graphical Presentation of
Baseline 24-hour TSP Levels
Annex B1 Copies of Calibration
Certificates for Noise Monitoring Equipment
Annex B2 Day-time 07:00-19:00 hrs Baseline Noise Monitoring Data
Annex B3 Evening-time 19:00-23:00 hrs and Holidays 07:00-19:00hrs Baseline Noise Monitoring
Data
Annex B4 Night-time 23:00-07:00 hrs of the next day Baseline Noise Monitoring Data
Annex B5 Graphical Presentation of
Baseline Noise Levels
Annex C1 Copies of Calibration
Certificates for Water Quality Monitoring Equipment
Annex C2 Quality Control Report for
Laboratory Analysis
Annex C3 Baseline Water Quality Monitoring
Results
Annex C4 Graphical Presentation of
Baseline Water Quality Monitoring Data
Annex D Baseline Dolphin Monitoring Report
Prepared by Chinese White Dolphin (CWD) Service
Contract No. HY/11/02
Annex E Baseline Air Quality, Noise and
Water Quality Monitoring Schedule
Annex F Weather Conditions during Baseline
Monitoring Period
Annex G Baseline Monitoring Report for
Land-based Dolphin Behavioural and Movement
Monitoring
Annex H Baseline Monitoring Report for
Underwater Noise and Dolphin Acoustic Behavioural
Monitoring
EXECUTIVE SUMMARY
Under Contract No. HY/2012/07, Gammon Construction
Limited is commissioned by the Highways Department (HyD)
to undertake the design and construction of the Southern Connection Viaduct
Section of Tuen Mun – Chek Lap Kok Link (TM-CLKL) (“the
Contract”). ERM-Hong Kong, Limited
(ERM) has been appointed as the Environmental Team (ET) for the Contract.
According to the requirements of the Environmental Monitoring and Audit
Manual (EM&A Manual) which is prepared for the TM-CLKL Project (Register No.: AEIAR-
146/2009), baseline monitoring has been undertaken
prior to commencement of the construction works of the Contract. This Baseline Monitoring Report presents
findings of the following baseline monitoring components:
Ÿ Air Quality;
Ÿ Noise;
Ÿ Water Quality; and
Ÿ Ecology (including baseline
walk-over survey, baseline dolphin monitoring and baseline bored piling
monitoring).
Before the commencement of the Contract, HyD employed environmental specialists under Agreement No. CE35/2011 (EP) and Contract No. HY/2011/02 to conduct baseline
environmental monitoring of air quality, noise, water quality and ecology to
facilitate early commencement of construction of Hong Kong Boundary Crossing
Facility (HKBCF) reclamation works and TM-CLKL advance Southern
Landfall reclamation works under Contract
No. HY/2010/02. The baseline environmental monitoring was
undertaken between September and November 2011 in accordance with requirements
in the EM&A Manuals for the Hong Kong Link Road (HKLR), HKBCF and TM-CLKL. A Baseline Environmental Monitoring
Report (Version C) for Hong Kong-Zhuhai-Macao Bridge Hong Kong Projects –
Investigation (hereafter referred to as “BEMR”) was prepared to fulfill the
Environmental Permits’ conditions for HKBCF (including TM-CLKL southern
landfall) Project ().
In the present baseline monitoring report, relevant
baseline monitoring results for air quality, noise, water quality and ecology (baseline
dolphin monitoring) presented in the BEMR have been adopted for this Contract. In addition, baseline water quality
monitoring, baseline bored piling monitoring and baseline walk-over survey have
been undertaken in the period of August to October 2013 to collect additional
baseline monitoring data for the Contract which were not covered by the 2011 baseline
monitoring.
The baseline monitoring works undertaken for air
quality, noise, water quality and ecology for the Contract are presented in Tables
1-4 below.
Air Quality
Table 1 Baseline
Air Quality Monitoring Period
|
Monitoring Stations
|
Baseline Monitoring Period
|
|
ASR 9A – Siu Ho Wan MTRC Depot
|
18/10/2011 – 31/10/2011
|
|
ASR 9C – Siu Ho Wan MTRC Depot
|
During the monitoring,
there was no major dust generating activities undertaken in the vicinity of the
two monitoring stations (Table 1). Data collected were reviewed and
analyzed to determine the Action and Limit Levels for air quality which will be
used for the impact monitoring throughout the construction of the Contract. Details on the monitoring methodology,
locations and results are presented in Section
2.
Noise
Table 2 Baseline
Noise Monitoring Period
|
Monitoring Station
|
Baseline Monitoring Period
|
|
NSR 1 – Pak Mong Village
|
18/10/2011-1/11/2011
|
Monitoring data collected was reviewed and analyzed in accordance with
requirements of the EM&A Manual.
Details on the methodology, locations and results of monitoring are
presented in Section 3 of this
report. The baseline noise
monitoring data was analyzed for the following periods:
·
Daytime: 0700-1900
hrs on normal weekdays
·
Evening-time: 1900-2300 hrs
·
Holiday-time: 0700-1900 hrs on holidays
·
Night-time: 2300-0700
hrs of next day
Water Quality
Table 3 Baseline
Water Quality Monitoring Period
|
Monitoring Stations
|
Parameters, unit
|
Baseline Monitoring Period (1)
|
|
IS(Mf)9, IS(Mf)16, IS8, SR4, CS(Mf)3, CS(Mf)5
|
Ÿ
Temperature(°C)
Ÿ
pH(pH unit)
Ÿ
Turbidity (NTU)
Ÿ
Water depth (m)
Ÿ
Salinity (ppt)
Ÿ
Dissolved Oxygen (DO) (mg/L and % of saturation)
Ÿ
Suspended solids (SS)
(mg/L)
|
6/10/2011 – 31/10/2011
|
|
SR4a (2)
|
29/8/2013 – 24/9/2013
|
|
Notes:
(1) 3 days per
week, at mid-flood and mid-ebb tides, for a period of 4 weeks prior to the
commencement of the marine works)
(2) Additional baseline
water quality monitoring was undertaken at SR4a for this Contract as per
recommendation of the Environmental Review for the Temporary Staging for
Construction of the Southern Connection (ERM, 2013).
|
Details of the baseline water quality
monitoring are presented in Section 4. The collected data were used to
establish the Action and Limit Levels for Dissolved Oxygen (DO), Turbidity and Suspended
Solids (SS) for the impact monitoring throughout the construction of the Contract.
Ecology
Baseline walk-over survey was undertaken on
13 and 24 September 2013 to confirm the existing ecological conditions before
commencement of the Contract’s construction works with reference to the habitat
maps presented in the EIA Report. Findings
of the baseline walk-over survey are presented in Section 5.1.
Table 4 Baseline
Dolphin Monitoring Period
|
Date of Baseline Dolphin Monitoring
|
|
1
|
05/09/2011
|
|
2
|
07/09/2011
|
|
3
|
16/09/2011
|
|
4
|
23/09/2011
|
|
5
|
06/10/2011
|
|
6
|
10/10/2011
|
|
7
|
13/10/2011
|
|
8
|
17/10/2011
|
|
9
|
28/10/2011
|
|
10
|
01/11/2011
|
|
11
|
02/11/2011
|
|
12
|
05/11/2011
|
|
13
|
06/11/2011
|
|
14
|
07/11/2011
|
Baseline dolphin monitoring
was undertaken from September to November 2011. Details on the monitoring methodology,
locations and findings are presented in Section
5.2. Determination of Action
and Limit Levels for dolphin monitoring is also presented under the same
section.
Baseline bored piling
monitoring, including land-based theodolite tracking, underwater noise
monitoring and acoustic behavioural monitoring, were
undertaken from September to October 2013.
Details on the monitoring methodology, locations and findings are
presented in Section 5.3. Determination of Action and Limit Levels
as well as the Event Action Plan for the bored piling monitoring is also
presented under the same section.
1
Introduction
According to
the findings of the Northwest New Territories (NWNT) Traffic and Infrastructure
Review conducted by the Transport Department, Tuen Mun Road, Ting Kau Bridge, Lantau Link and North Lantau
Highway would be operating beyond capacity after 2016. This forecast has been based on the
estimated increase in cross boundary traffic, developments in the Northwest New
Territories (NWNT), and possible developments in North Lantau,
including the Airport developments, the Lantau
Logistics Park (LLP) and the Hong Kong – Zhuhai – Macao Bridge (HZMB). In order to cope with the anticipated
traffic demand, two new road sections between NWNT and North Lantau – Tuen Mun
– Chek Lap Kok Link
(TM-CLKL) and Tuen Mun
Western Bypass (TMWB) are proposed.
An
Environmental Impact Assessment (EIA) of TM-CLKL was prepared in accordance
with the EIA Study Brief (No. ESB-175/2007) and the Technical Memorandum of the Environmental
Impact Assessment Process (EIAO-TM). The EIA Report was submitted under the
Environmental Impact Assessment Ordinance (EIAO) in August 2009. Subsequent to the approval of the EIA
Report (EIAO Register Number AEIAR-145/2009), an Environmental Permit
(EP-354/2009) for TM-CLKL was granted by the Director of Environmental
Protection (DEP) on 4 November 2009, and EP variation (EP-354/2009A) was issued
on 8 December 2010.
Under
Contract No. HY/2012/07,
Gammon Construction Limited is commissioned by the Highways Department (HyD) to undertake the design and construction of the
Southern Connection Viaduct Section of TM-CLKL (“the Contract”), including the
following:
·
A
dual 2-lane main marine crossing (Structures E2, E5, E6, E7 and E8) across the
sea between the southern landfall of TM-CLKL and NLH;
·
Five
link or slip roads (Structures F1, F2, F3, F4 and F5) at the southern landfall
of TM-CLKL connecting a dual 2-lane rural trunk road (main marine crossing) in
(i) above with the HKBCF and the TM-CLKL Northern
Connection Sub-sea Tunnel Section;
·
Four
link roads (Structures E1, A1, A2, B1, B2, B3,C1, C2, C3, C4, D1, D2, D3 and
D4) at North Lantau connecting the main marine
crossing in (i) above with the NLH ;
·
Associated
civil, structural, geotechnical, marine, environmental protection, landscaping,
drainage, highway electrical and mechanical (E&M) works, street lightings,
traffic aids and sign gantries, marine navigational aids, ship impact
protection system, water mains and
fire hydrants, lightning protection system, SHMS, as well as operation and maintenance
provisions of viaducts, provisioning of facilities for installation of TCSS, provisioning
of facilities for installation of telecommunication cables/equipment and reprovisioning works of affected existing
facilities/utilities; and
·
Incidental
works thereto the above and other associated works which are shown on the Drawings
or specified in the Contract.
Layout of the
Contract components is presented in Figure 1.1.
ERM-Hong Kong,
Limited (ERM) has been appointed as the Environmental Team (ET) for the
Contract.
The scope of the EM&A programme follows the demarcation of monitoring
responsibilities set out in Environmental Project Office’s letter dated 29.10.2013. Under the defined scope and according to relevant requirements
of the Environmental Monitoring and Audit Manual (EM&A Manual) which is
prepared for the TM-CLKL Project (Register
No.: AEIAR- 146/2009), baseline monitoring has
been undertaken prior to commencement of the construction works of the
Contract. This Baseline Monitoring
Report presents findings of the following baseline monitoring components:
Ÿ Air Quality;
Ÿ Noise;
Ÿ Water Quality; and
Ÿ Ecology (including baseline
walk-over survey, baseline dolphin monitoring and baseline bored piling
monitoring).
Before the commencement of the Contract, HyD employed environmental specialists under Agreement No. CE35/2011 (EP) and Contract No. HY/2011/02 to conduct
baseline environmental monitoring of air quality, noise, water quality and
ecology to facilitate early commencement of construction of Hong Kong Boundary
Crossing Facility (HKBCF) reclamation works and TM-CLKL advance Southern
Landfall reclamation works under Contract
No. HY/2010/02. The baseline environmental monitoring was
undertaken between September and November 2011 in accordance with requirements
in the EM&A Manuals for the Hong Kong Link Road (HKLR), HKBCF and
TM-CLKL. A Baseline Environmental
Monitoring Report (Version C) for Hong Kong-Zhuhai-Macao Bridge Hong Kong
Projects – Investigation (hereafter referred to as “BEMR”) was prepared to
fulfil the Environmental Permits’ conditions for HKBCF (including TM-CLKL
southern landfall) Project ().
In the present baseline
monitoring report, relevant baseline monitoring results for air quality, noise,
water quality and ecology (baseline dolphin monitoring) presented in the BEMR
have been adopted for this Contract.
In addition, baseline water quality monitoring, baseline bored piling
monitoring and baseline walk-over survey have been undertaken in the period of
August to October 2013 to collect additional baseline monitoring data for the
Contract which were not covered by the 2011 baseline monitoring. Based on findings from the 2011 and 2013
baseline monitoring, baseline levels for air quality, noise, water quality and
ecology are set out in this report for the Contract in accordance with the
EM&A Manual. These baseline
levels will be used as the basis for compliance check during the impact
monitoring in the construction of the TM-CLKL southern viaduct. Locations, schedule, methodology and
results for the baseline monitoring are also presented in this report.
Following this introductory section, the remainder of the Report is structured
as follows:
Section 2 Air
Quality – presents the methodology and findings of the
baseline air quality monitoring.
Section 3 Noise – presents the methodology
and findings of the baseline noise monitoring.
Section 4 Water
Quality – presents the methodology and findings of the baseline water quality
monitoring.
Section 5 Ecology – presents the methodology
and findings of the baseline walk-over survey, baseline dolphin monitoring as
well as baseline bored piling monitoring programme.
Section 6 Conclusion
2
aIR qUALITY
According to the EM&A Manual
of the TM-CLKL Project, baseline air quality monitoring should be carried out
for a period of not less than 14 days to collect baseline data on 1-hour and
24-hour Total Suspended Particulates (TSP) levels at all monitoring locations. Monitoring of 1-hour TSP should be
carried out at least three times per day while that of 24-hour TSP should be
conducted daily for 14 consecutive days.
Further details of the baseline air
quality monitoring are presented in the following sections.
2.2
Monitoring
Locations
Baseline air quality monitoring was conducted at two (2) monitoring
stations (ie ASR9A and ASR9C – Siu Ho Wan MTRC Depot)
under this Contract. Locations of
the two monitoring stations, ASR9A and ASR9C, are shown in Figure 1.1.
High Volume Samplers (HVS) were used to carry
out the 24-hour TSP monitoring. Direct
reading dust meter was used to measure 1-hour average TSP levels. The 1-hour TSP level was determined
periodically by HVS to check the validity and accuracy of the results measured
by the direct reading method.
Wind data monitoring equipment was set at
Rooftop of Village Office at San Tau for logging wind speed and wind direction
such that the wind sensors are clear of obstructions or turbulence caused by
building. The wind data monitoring
equipment is recalibrated at least once every six months.
Table
2.1 summarizes the equipment used in the baseline air
quality monitoring programme. Copies of the calibration certificates
for the equipment are presented in Annex A1.
Table 2.1 Air
Quality Monitoring Equipment
|
Equipment
|
Model and Make
|
Quantity
|
|
HVS Sampler
|
GMWS 2310 c/w of TSP sampling inlet
|
9
|
|
Calibrator
|
G25A
|
1
|
|
1-hour TSP Dust Meter
|
Laser Dust Monitor – Model LD3/3B
|
7
|
|
Wind Anemometer
|
Davis Weather Monitor II, Model no. 7440
|
1
|
Table 2.2 summarizes the monitoring parameters, monitoring period and frequency of
baseline air quality monitoring.
Table 2.2 Frequency
and Parameters of Air Quality Monitoring
|
Monitoring Station
|
Location for Measurement
|
Parameter
|
Period
|
Frequency
|
|
ASR 9A
|
Near Security Office of Siu Ho Wan MTRC Depot
|
1-hour TSP
24-hour TSP
|
0700-1900 for 1-hour TSP
24 hours for 24-hour TSP
|
3 times/ day for 1-hour TSP
Daily for 24-hour TSP
|
|
ASR 9C
|
Near Staff Canteen of Siu Ho Wan MTRC Depot
|
Weather data was recorded during the baseline
period and is shown in Annex F.
The air temperature, precipitation and the relative humidity data were obtained
from Hong Kong Observatory while wind speed and direction were recorded by the
installed Wind Anemometer. The
general weather conditions (i.e. sunny, cloudy or rainy) were recorded by the
field staff on the monitoring days.
Instrumentation
High volume Samplers (HVS) completed with
appropriate sampling inlets was employed for air quality monitoring. Each sampler was composed of a motor, a
filter holder, a flow controller and a sampling inlet and its performance
specification complies with that required by USEPA Standard Title 40, Code of
Federation Regulations Chapter 1 (Part 50).
HVS Installation
The following guidelines were adopted during
the installation of HVS:
• Sufficient support was provided to secure the
samplers against gusty wind;
• No two samplers were placed less than 2 m apart;
• The distance between the sampler and an obstacle,
such as buildings, was at least twice the height that the obstacle protrudes
above the sampler;
• A minimum of 2 m of separation from walls,
parapets and penthouses was required for rooftop samples;
• A minimum of 2 m separation from any supporting
structure, measured horizontally, was required;
• No furnaces or incineration flues were nearby;
• Airflow around the sampler was unrestricted;
• The samplers were more than 20 meters from the
drip line; and
• Any wire fence and gate used to protect the
sampler should not cause any obstruction during monitoring.
Filter Preparation
Fiberglass filters were used. These filters have a collection
efficiency of larger than 99% for particles of 0.3µm in diameter. A HOKLAS accredited laboratory, Wellab Ltd., was responsible for the preparation of 24-hr
conditioned and pre-weighed filter papers for the monitoring.
All filters were equilibrated in the
conditioning environment for 24 hours before weighing. The conditioning environment temperature
was around 25 °C and not varied by more than ±3 °C; the relative humidity (RH)
was <50% and not varied by more than ±5%.
Operating/ Analytical Procedures
Operating/analytical procedures for the air
quality monitoring were highlighted as follows:
Ÿ Prior to the commencement
of the dust sampling, the flow rate of the HVS was properly set (between 1.1
m3/min. and 1.4 m3/min.) in accordance with the manufacturer's instruction to
within the range recommended in USEPA Standard Title 40, CFR Part 50.
Ÿ The power supply was checked
to ensure the sampler worked properly.
Ÿ On sampling, the sampler
was operated for 5 minutes to establish thermal equilibrium before placing any
filter media at the designated air quality monitoring station.
Ÿ The filter holding frame
was then removed by loosening the four nuts and carefully a weighted and
conditioned filter was centered with the stamped number upwards, on a
supporting screen.
Ÿ The filter was aligned on
the screen so that the gasket formed an airtight seal on the outer edges of the
filter. Then the filter holding
frame was tightened to the filter holder with swing bolts. The applied pressure should be
sufficient to avoid air leakage at the edges.
Ÿ The shelter lid was closed
and secured with the aluminum strip.
Ÿ The timer was then programmed.
Information was recorded on the
record sheet, which included the starting time, the weather condition and the
filter number (the initial weight of the filter paper can be found out by using
the filter number).
Ÿ After sampling, the filter
was removed and sent to the laboratory for weighing. The elapsed time was also recorded.
Ÿ Before weighing, all
filters were equilibrated in a conditioning environment for 24 hours. The
conditioning environment temperature should be between 25°C and 30°C and not vary
by more than ±3°C; the RH should be < 50% and not vary by more than ±5%. Weighing results were used for further
analysis of TSP concentrations collected by each filter.
Maintenance and Calibration
The following maintenance/calibration was
required for the HVS:
Ÿ The high volume motors and
their accessories were properly maintained. Appropriate maintenance such as
routine motor brushes replacement and electrical wiring checking were made to
ensure that the equipment and necessary power supply were in good working
condition.
Ÿ All HVS were calibrated
(five point calibration) using Calibration Kit prior to the commencement of the
baseline monitoring and thereafter at bi-monthly intervals.
Measuring Procedures
The 1-hour TSP levels were measured by the
dust meter in accordance with procedures specified in the Manufacturer’s
Instruction Manual which are described as follows:
Ÿ The 1-hour dust meter was placed
at least 1.3 m above ground.
Ÿ Set POWER to “ON” and make
sure that the battery level was not flash or in low level.
Ÿ Allow the instrument to
stand for about three (3) minutes with the cap of the air sampling inlet
released.
Ÿ Pushed the knob at MEASURE
position.
Ÿ Set time/mode setting to
[BG] by pushing the time setting switch. Then, started the background measurement
by pushing the start/stop switch once. It took approximately six (6) seconds to complete
the background measurement.
Ÿ Pushed the time setting
switch to change the time setting display to [MANUAL] at the bottom left of the
liquid crystal display. Finally,
pushed the start/stop switch to stop the measuring after 1 hour sampling.
Ÿ Information such as
sampling date, time, count value and site condition
were recorded during the monitoring period.
Maintenance and Calibration
For the 1-hour dust meter, it should be checked
and calibrated by HVS to determine the validity and accuracy of the results
measured by direct reading method at 2-month intervals throughout the air
quality monitoring period.
Under this Contract, baseline air quality monitoring was conducted at
two (2) monitoring stations, namely ASR 9A and ASR 9C, at the Siu Ho Wan MTRC
Depot during the period of 18 October and 2 November 2011. The detailed monitoring schedule is presented
in Annex E.
The monitoring data of
ASR 9A and ASR 9C are summarized in Tables 2.3 and 2.4. All monitoring data of 1- hour and 24-hour TSP are presented in Annexes A2 and A4, respectively.
Graphical
presentations of the 1-hour TSP and 24-hour TSP results are shown in Annex A3 and A5, respectively. Detailed weather conditions during the baseline monitoring period
are
presented in Annex F.
Table 2.3 Summary
of Baseline 1-hour TSP Monitoring Results
|
Monitoring Station
|
Average TSP Concentration (µg/m3)
(Range)
|
|
ASR 9A – Siu Ho Wan MTRC Depot
|
222.3
(71.2-463.6)
|
|
ASR 9C – Siu Ho Wan MTRC Depot
|
219.9
(70.2-461.8)
|
Table 2.4 Summary
of Baseline 24-hour TSP Monitoring Results
|
Monitoring Station
|
Average TSP Concentration (µg/m3)
(Range)
|
|
ASR 9A – Siu Ho Wan MTRC Depot
|
74.1
(38.6-128.1)
|
|
ASR 9C – Siu Ho Wan MTRC Depot
|
74.5
(45.1-113.4)
|
The weather was generally sunny and fine during the baseline monitoring period.
Road traffic dust is identified as the influencing factors which may
affect the results of
baseline monitoring.
Guidelines for establishing the Action and Limit Levels
for air quality monitoring during the construction of the Contract are
presented in Table
2.5.
Table 2.5 Guidelines
for Establishing Action and Limit Levels for Air Quality
|
Parameters
|
Action Level
|
Limit Level
|
|
1-hour TSP Level in µg/m3
|
For baseline level ≤ 384 µg/m3,
Action level = (Baseline level*1.3 + Limit level)/2
For baseline level > 384 µg/m3,
Action level = Limit level
|
500
|
|
24-hour TSP Level in µg/m3
|
For baseline level ≤ 200 µg/m3,
Action level = (Baseline level*1.3 + Limit level)/2
For baseline level > 200 µg/m3,
Action level = Limit level
|
260
|
Following the above guidelines, the Action and Limit Levels for air
quality impact monitoring are determined and presented in Tables 2.6 and 2.7.
Table 2.6 Action
and Limit Levels for 1-hour TSP
|
Location
|
Action Level, µg/m3
|
Limit Level, µg/m3
|
|
ASR 9A
|
394
|
500
|
|
ASR 9C
|
393
|
Table 2.7 Action
and Limit Levels for 24-hour TSP
|
Location
|
Action Level, µg/m3
|
Limit Level, µg/m3
|
|
ASR 9A
|
178
|
260
|
|
ASR 9C
|
Should non-compliance with the air quality criteria occur, the ET, the IEC and the SOR and the Contractor shall undertake
their specified actions in accordance with
the
Action Plan shown in Table 3.2.
Table 2.8 Event/
Action Plan for Air Quality
|
|
ACTION
|
|
EVENT
|
ET (1)
|
IEC (1)
|
SOR(1)
|
Contractor
|
|
Action Level
|
|
|
|
|
|
1. Exceedance for one
sample
|
1. Identify the source.
2. Inform the IEC and the SOR.
3. Repeat measurement to
confirm finding.
4. Increase monitoring frequency
to
daily.
|
1. Check monitoring data
submitted by the ET.
2. Check Contractor’s
working method.
|
1. Notify Contractor.
|
1. Rectify any unacceptable practice
2. Amend working methods if
appropriate
|
|
2. Exceedance for two
or more consecutive
samples
|
1. Identify the source.
2. Inform the IEC and the SOR.
3. Repeat measurements to confirm findings.
4. Increase monitoring frequency to daily.
5. Discuss with the IEC and the Contractor on
remedial actions required.
6. If exceedance
continues, arrange meeting with the IEC and the SOR.
7. If exceedance stops,
cease additional monitoring.
|
1. Check
monitoring data submitted by the ET.
2. Check
the Contractor’s working method.
3. Discuss
with the ET and the Contractor on possible remedial measures.
4. Advise
the SOR on the effectiveness of the proposed remedial measures.
5. Supervisor
implementation of remedial measures.
|
1. Confirm receipt of
notification of failure in writing.
2. Notify the Contractor.
3. Ensure remedial measures properly
implemented.
|
1. Submit proposals for remedial
actions to IEC within 3 working days of notification
2. Implement the agreed proposals
3. Amend proposal if appropriate
|
3
nOISE
According to the EM&A Manual of TM-CLKL,
baseline noise monitoring should be carried out for a period of fourteen (14)
days at all designated monitoring locations. The noise levels should be measured in
terms of A-weighted equivalent continuous sound pressure level (Leq).
Details of the baseline noise monitoring are presented in the following
sections.
Baseline noise monitoring was conducted at one (1) monitoring station,
namely NSR 1 at Pak Mong Village, under the Contract
(Figure 1.1).
3.3
Monitoring
Equipment
Integrating Sound Level Meter was used for noise monitoring. The meter is a Type 1 sound level meter
capable of giving a continuous readout of the noise level readings including
equivalent continuous sound pressure level (Leq)
and percentile sound pressure level (Lx). The meter used also complied with
International Electrotechnical Commission
Publications 651:1979 (Type 1) and 804:1985 (Type 1) specifications. The noise monitoring equipment being
used and copies of the calibration certificates for the sound level meter and
calibrator are presented in Annex B1.
In accordance with the EM&A Manual,
baseline noise for the A-weighted levels Leq,
L10 and L90 was recorded. Data obtained from the baseline noise
monitoring were processed and presented for the following periods:
·
Daytime: 0700-1900 hrs on
normal weekdays
·
Evening time: 1900-2300 hrs
·
Holiday time: 0700-1900 hrs
on holidays
·
Night time: 2300-0700 hrs
of next day
The frequency and parameters of noise
measurement are presented in Table 3.1.
Table 3.1 Frequency
and Parameters of Noise Monitoring
|
Monitoring Station
|
Location for Measurement
|
Time Period
|
Duration, min
|
Parameter
|
|
NSR 1
|
Pak Mong Village (Roof Top of Pak Mong Watch Tower)
|
Daytime on normal weekdays (0700-1900 hrs)
Evening time on all days (1900-2300 hrs) and daytime
during holidays (including Sundays) (0700-1900 hrs)
Night time on all days (2300-0700 hrs)
|
30 min
5min
|
Leq, L10 & L90
|
Façade measurement was taken at the monitoring station NSR1. Weather data was recorded
during the baseline period and is presented in Annex F. The air temperature, precipitation and
the relative humidity data were obtained from Hong Kong Observatory where the
wind speed and direction were recorded by the installed Wind Anemometer. The general weather conditions (i.e.
sunny, cloudy or rainy) were recorded by the field staff on the monitoring
days.
The monitoring procedures are as follows:
Ÿ
The microphone head of the
head level meter was normally positioned 1 m exterior of the noise sensitive
façade and lowered sufficiently so that the building’s external wall acts as a
reflecting surface.
Ÿ
For free field measurement,
the meter was positioned away from any nearby reflective surfaces. All records for free field noise levels would
be adjusted with a correction of +3 dB(A).
Ÿ
The battery condition was
checked to ensure good functioning of the meter.
Ÿ Parameters such as
frequency weighting, time weighting and measurement time were set as follows:
- frequency weighting: A
- time weighting: Fast
-
measurement
time: 5
minutes (Leq (30-min) would be
determined for daytime noise by calculating the logarithmic average of six Leq (5min) data.)
Ÿ Prior
to and after noise measurement, the meter was calibrated using the calibrator
for 94.0 dB at 1,000 Hz. If the
difference in the calibration level before and after measurement was more than
1.0 dB, the measurement was considered invalid and repeat of noise measurement
was required after re-calibration or repair of the equipment.
Ÿ Noise
monitoring was carried out continuously for 24 hours during the 14 days
baseline monitoring period. Monitoring
data were recorded and stored automatically within the sound level meter
system. At the end of the
monitoring period, noise levels in term of Leq,
L90 and L10 were recorded. In addition, site conditions and noise
sources were recorded when the equipment were checked and inspected every two
days.
Ÿ All
the monitoring data stored in the sound level meter system were downloaded
through the computer software, and all these data were checked and reviewed on computer.
Maintenance and calibration
procedures were follows:
Ÿ The
microphone head of the sound level meter and calibrator were cleaned with a
soft cloth at quarterly intervals;
Ÿ The
sound level meter and calibrator were
checked and calibrated
at yearly intervals; and
Ÿ Immediately
prior to and following each noise measurement, the accuracy of the sound level
meter should be checked using an acoustic calibrator generating known sound
pressure level at known frequency. Measurements
may be accepted as valid only if the calibration levels from before and after
the noise measurement agree to within 1.0 dB.
Baseline noise monitoring was conducted at the noise monitoring station
NSR1 in the period of 18 October and 1 November 2011 for this Contract. The monitoring schedule is shown in Annex E.
The
baseline noise monitoring results are summarized in Tables 3.2 to 3.4. All
baseline noise monitoring results are presented in Annexes B2-B4. Graphical presentations of the data are
provided in Annex B5.
Weather conditions recorded during the baseline monitoring period are
shown in Annex F.
Table 3.2 Summary
of Daytime Noise Monitoring Results (Normal Weekdays)
|
Daytime
0700-1900 hrs on
normal weekdays
|
Range
of Noise Level, dB(A)
|
|
Leq (30
min)
|
L10 (5 min)
|
L90 (5 min)
|
|
Mean
|
Max
|
Min
|
Mean
|
Max
|
Min
|
Mean
|
Max
|
Min
|
|
NSR 1
|
56.2
|
65.9
|
48.4
|
58.4
|
75.4
|
42.7
|
46.5
|
59.9
|
38.8
|
Table 3.3 Summary
of Evening-Time & Daytime (Holidays) Noise Monitoring Results
|
Evening-time
1900-2300 hrs on
all days & Daytime 0700-1900 hrs on holidays
|
Range
of Noise Level, dB(A)
|
|
Leq (30
min)
|
L10 (5 min)
|
L90 (5 min)
|
|
Mean
|
Max
|
Min
|
Mean
|
Max
|
Min
|
Mean
|
Max
|
Min
|
|
NSR 1
|
54.7
|
68.0
|
41.4
|
58.1
|
72.1
|
42.7
|
45.5
|
59.6
|
39.1
|
Table 3.4 Summary
of Night-Time Noise Monitoring Results
|
Night-time 2300-0700 hrs
of the next day
|
Range
of Noise Level, dB(A)
|
|
Leq (30
min)
|
L10 (5 min)
|
L90 (5 min)
|
|
Mean
|
Max
|
Min
|
Mean
|
Max
|
Min
|
Mean
|
Max
|
Min
|
|
NSR 1
|
50.1
|
69.1
|
37.0
|
53.0
|
73.6
|
38.4
|
42.2
|
52.0
|
35.2
|
The weather
was generally sunny and fine during the baseline monitoring periods. Insect and bird calling was noted as the
influencing factors which may affect the baseline monitoring results.
3.8
Action and Limit Levels
The Action and
Limit Levels were established in accordance with the EM&A Manual. The baseline noise level should be
referenced during the compliance check during the impact noise monitoring
period. Table 3.5 presents the Action and Limit Levels for construction
noise of the Contract. Should
non-compliance of the criteria occur, the ET, the IEC, the SOR and the
Contractor shall undertake their specified actions in accordance with the
Action Plan shown in Table 3.6.
Table 3.5 Action
Limit Levels for Noise during Construction Period
|
Time Period
|
Action Level
|
Limit Level
|
|
0700-1900 hrs on normal weekdays
|
When one
documented complaint is received
|
75* dB(A)
|
Table 3.6 Event/
Action Plan for Construction Noise
|
|
ACTION
|
|
EVENT
|
ET
|
IEC
|
SOR
|
Contractor
|
|
Action Level
|
1. Notify
the IEC and the Contractor.
2. Carry
out investigation.
3. Report
the results of investigation to the IEC and the Contractor.
4. Discuss
with the Contractor and formulate remedial measures.
5. Increase
monitoring frequency to check mitigation effectiveness.
|
1. Review
the analysed
results submitted by the ET.
2. Review
the proposed remedial measures by the Contractor and advise the SOR
accordingly.
3. Supervise
the implementation of remedial measures.
|
1. Confirm
receipt of notification of failure in writing.
2. Notify
the Contractor.
3. Require
the Contractor to propose remedial measures for the analysed noise problem.
4. Ensure
remedial measures are properly implemented.
|
1. Submit
noise mitigation proposals to IEC
2. Implement
noise mitigation proposals
|
|
Limit Level
|
1. Notify
the IEC, the SOR, the DEP and the Contractor.
2. Identify
the source.
3.
Repeat measurement to confirm findings.
4. Increase
monitoring frequency.
5. Carry
out analysis of Contractor’s working procedures to determine possible
mitigation to be implemented.
6.
Inform the IEC, the SOR and the DEP the causes & actions taken for
the exceedances.
7. Assess
effectiveness of the Contractor’s remedial actions and keep the IEC, the DEP
and the SOR informed of the results.
8. If exceedance stops, cease additional monitoring.
|
1.
Discuss amongst the SOR, the ET and the Contractor on the potential
remedial actions.
2. Review
the Contractor’s remedial actions whenever necessary to assure their effectiveness
and advise the SOR accordingly.
3. Supervise
the implementation of remedial measures.
|
1. Confirm
receipt of notification of failure in writing.
2. Notify
the Contractor.
3. Require
the Contractor to propose remedial measures for the analysed noise problem.
4. Ensure
remedial measures are properly implemented.
5. If exceedance continues, consider what activity of the work
is responsible and instruct the Contractor to stop that activity of work
until the exceedance is abated.
|
1. Take
immediate action to avoid further exceedance
2. Submit
proposals for remedial actions to IEC within 3 working days of notification
3. Implement
the agreed proposals
4. Resubmit
proposals if problem still not under control
5. Stop
the relevant activity of works as determined by the SOR until the exceedance is abated.
|
4
Water quality
According to the EM&A Manual of TM-CLKL, baseline
water quality monitoring should be carried out three (3) times per week for a
period of four (4) weeks at all the monitoring locations prior to the
commencement of marine works. The
measurement should be taken at all designated monitoring stations, including
control stations, at mid flood (within ±1.75 hour of the predicated time) and
mid-ebb (within ±1.75 hour of the predicated time) tides. Further details of the baseline water quality monitoring under this
Contract are presented in the following sections.
Baseline water
quality monitoring was conducted at seven (7) monitoring stations under the
Contract. Coordinates of the
monitoring stations are summarized in
Table 4.1. Locations of the
monitoring stations are shown in Figure 1.1.
Table 4.1 Marine
Water Quality Monitoring Locations
|
Monitoring Stations
|
Coordinates
|
|
Easting
|
Northing
|
|
IS(Mf)9
|
813273
|
818850
|
|
IS(Mf)16
|
814328
|
819497
|
|
IS8
|
814251
|
818412
|
|
SR4
|
814760
|
817867
|
|
SR4a
|
815247
|
818067
|
|
CS(Mf)3
|
809989
|
821117
|
|
CS(Mf)5
|
817990
|
821129
|
4.2
Monitoring
Parameters and Frequency
Table 4.2 summarizes the monitoring parameters, monitoring
period and frequencies of the water quality monitoring.
Table 4.2 Water
Quality Monitoring Parameters and Frequency
|
Monitoring Stations
|
Parameters, unit
|
Depth
|
Frequency
|
|
IS(Mf)9
IS(Mf)16
IS8
SR4
SR4a*
CS(Mf)3
CS(Mf)5
|
Ÿ
Temperature(°C)
Ÿ
pH(pH unit)
Ÿ
Turbidity (NTU)
Ÿ
Water depth (m)
Ÿ
Salinity (ppt)
Ÿ
DO (mg/L and % of
saturation)
Ÿ
SS (mg/L)
|
3 water depths: 1m
below sea surface,
mid-depth and 1m
above sea bed.
|
Baseline monitoring: 3 days
per week, at mid-flood and
mid-ebb tides, for a period of
4 weeks prior to the
commencement of the marine
works
|
|
|
|
If the water depth is
less than 3m, mid-depth
sampling only.
|
|
|
|
If water depth less
than 6m, mid-depth
may be omitted.
|
|
Note: * Additional monitoring station under this Contract as per recommendation of the Environmental Review for the Temporary
Staging for Construction of the Southern Connection
(ERM, 2013)..
|
In addition to the
parameters presented in Table 4.2, monitoring
location/position, time, water depth, sampling depth, tidal stages, weather
conditions and any special phenomena or works underway nearby should also be
recorded.
Instrumentation
Table
4.3 summarizes the equipment used in the baseline water
quality monitoring works. All the
monitoring equipment complied with the requirements set out in the EM&A
Manual. Copies of the calibration
certificates are attached in Annex C1.
Table 4.3 Water
Quality Monitoring Equipment
|
Equipment
|
Model
|
Qty.
|
|
Water Sampler
|
Kahlsico Water-Bottle Model 135DW 150
|
4
|
|
Multi-parameter Water
Quality System
|
YSI 6820-C-M/YSI 6920
|
6
|
|
Dissolved Oxygen Meter
|
YSI Pro 2030
|
1
|
|
pH Meter
|
HANNA HI 8314
|
1
|
|
Turbidity Meter
|
HACH 2100Q
|
1
|
|
Monitoring Position
Equipment
|
“Magellan” Handheld GPS
Model eXplorist GC
|
4
|
|
DGPS Koden KGP913MK2 (1)
|
1
|
|
Note:
(1) DGPS has been used for the baseline water quality
monitoring for station SR4a.
|
A multi-parameter meters (Model
YSI 6820-C-M /YSI 6920) were used to measure DO, turbidity, salinity, pH and
temperature for all monitoring stations except at SR4a.
For
water quality monitoring at SR4a, pH was measured by HANNA HI 8314, turbidity
was measured by HACH 2100Q whilst DO, salinity and temperature were measured by
YSI Pro 2030.
Operating/Analytical Procedures
At each sampling depth, two consecutive
measurements of DO level, DO saturation, salinity, turbidity, pH and
temperature were taken. The probes
were retrieved out of the water after the first measurement and then
re-deployed for the second measurement.
Where the difference in the value between the first and second readings
of each set was more than 25% of the value of the first reading, the reading
was discarded and further readings were taken. Two samples were collected for
laboratory analysis of SS content. Following collection, water samples for laboratory
analysis were stored in high density polythene bottles (250ml/1L) with no
preservatives added, packed in ice (cooled to
4°C
without being frozen) and kept in dark during both on-site temporary storage
and shipment to the testing laboratory.
The samples were delivered to the laboratory as soon as possible and the
laboratory determination works were started within 24 hours after collection of
the water samples. Sufficient
volume of samples was collected to achieve the detection limit.
Laboratory Analytical
Methods
The testing of all parameters for all
stations except SR4a was conducted by Wellab Ltd.
(HOKLAS Registration No.083) whilst that for station SR4a was conducted by ALS Technichem (HK) Pty Ltd. (HOKLAS Registration No. 066). Comprehensive quality assurance and
control procedures were in place in order to ensure quality and consistency in
results. The testing method and
reporting limit are provided in Table 4.4.
Table 4.4 Methods
for Laboratory Analysis for Water Samples
|
Determinant
|
Instrumentation
|
Analytical Method
|
Reporting Limit
|
|
Suspended Solids (SS)
|
Weighing
|
APHA 17e 2540D
|
0.5 mg/L (1)
|
Calibration
of In Situ Instruments
All in situ monitoring
instruments were checked, calibrated and certified by a
laboratory accredited under HOKLAS or other international accreditation scheme
before use, and subsequently re-calibrated at 3 monthly intervals throughout
all stages of the water quality monitoring programme. Responses of sensors and electrodes were
checked with certified standard solutions before each use. Wet bulb calibration for a DO meter was
carried out before measurement at each monitoring event.
For the on
site calibration of field equipment (Multi-parameter Water Quality
System), the BS 1427:2009, "Guide to on-site test methods for the analysis
of waters" was observed.
Sufficient stocks of spare
parts were maintained for replacements when necessary. Backup monitoring equipment was also
being made available so that monitoring can proceed uninterrupted even when
some equipment was under maintenance, calibration, etc.
Decontamination Procedures
Water sampling equipment used during the
course of the monitoring programme was decontaminated
by manual washing and rinsed clean seawater/distilled water after each sampling
event. All disposal equipment was
discarded after sampling.
Sampling Management and Supervision
All sampling bottles were labeled with the
sample I.D (including the indication of sampling station and tidal stage e.g.
IS1_me_a), laboratory number and sampling date. Water samples were dispatched to the
testing laboratory for analysis as soon as possible after the sampling. All
samples were stored in a cool box and kept at less than 4°C but without
frozen. All water samples were
handled under chain of custody protocols and relinquished to the laboratory
representatives at locations specified by the laboratory. The laboratory determination works were
started within 24 hours after collection of water samples.
Quality Control Measures for Sample Testing
The samples testing were performed by Wellab Ltd. and ALS Technichem (HK)
Pty Ltd. The following quality
control programme was performed by the laboratories
for every batch of 20 samples:
Ÿ One method blank; and
Ÿ One set of quality control
(QC) samples (including method QC and sample duplicate).
The QA/QC results are attached
in Annex C2.
Baseline water quality monitoring was
conducted between 6 and 31 October 2011 for all monitoring stations, except for
station SR4a for which monitoring was conducted between 29 August and 24
September 2013. The monitoring
results are shown in Annex C3. Graphical presentation of water quality
at the monitoring stations is given in Annex C4.
Detailed weather conditions at the monitoring locations during the
baseline monitoring period are shown in Annex F. The monitoring schedule is shown in Annex E.
During the baseline monitoring period, no
marine construction works were observed in the vicinity of all monitoring
stations. The baseline monitoring
results are thus considered representative of the ambient water quality.
The Action and Limit Levels for DO, SS and turbidity are determined in accordance
with requirements set out in the EM&A Manual which are summarized in Table 4.5.
Table 4.5 Action
and Limit Levels for Water Quality
|
Parameter (unit)
|
Water Depth
|
Action Level
|
Limit Level
|
|
Dissolved Oxygen (mg/L) (surface, middle and bottom
|
Surface and Middle
|
5%-ile of baseline data
|
4mg/L except 5mg/l for FCZ or 1%-ile of
baseline data
|
|
Bottom
|
5%-ile of baseline data
|
2mg/L or 1%-ile of baseline data
|
|
Turbidity (NTU)
|
Depth average
|
95%-ile of
baseline data and 120% of upstream control station’s turbidity at the same
tide of the
same day
|
99%-ile of
baseline and 130% of turbidity at the upstream control
station at the same tide of same day
|
|
SS (mg/L)
|
Depth average
|
95%-ile of
baseline data and 120% of upstream control station’s SS at the
same tide of the same day
|
99%-ile of
baseline and 130% of SS at the upstream control station at the same tide of
same day
|
|
Notes:
(1) Depth-averaged is
calculated by taking the arithmetic means of reading of all three depths
(2) For DO, non-compliance
of the water quality limit occurs when monitoring result is lower that the
limit.
(3) For SS & turbidity
non-compliance of the water quality limits occur when monitoring result is
higher than the limits.
|
The calculated Action and Limit levels are shown in Table 4.6.
Table 4.6 Action
and Limit Levels for Water Quality
|
Parameter (unit)
|
Water Depth
|
Action Level
|
Limit Level
|
|
Dissolved Oxygen (mg/L) (surface, middle and bottom
|
Surface and Middle
|
5.0
|
4.2 except 5 for FCZ
|
|
|
Bottom
|
4.7
|
3.6
|
|
Turbidity (NTU)
|
Depth average
|
27.5 and 120% of upstream control station’s
turbidity at the same tide of the
same day
|
47.0 and 130% of turbidity at the upstream
control
station at the same tide of same day
|
|
SS (mg/L)
|
Depth average
|
23.5 and 120% of upstream control station’s
SS at the
same tide of the same day
|
34.4 and 130% of SS at the upstream control
station at the same tide of same day
|
|
Notes:
(1) Depth-averaged is calculated
by taking the arithmetic means of reading of all three depths
(2) For DO, non-compliance
of the water quality limit occurs when monitoring result is lower that the
limit.
(3) For SS & turbidity
non-compliance of the water quality limits occur when monitoring result is
higher than the limits.
|
Table 4.7 Event/
Action Plan for Water Quality
|
Event
|
ET Leader
|
IEC
|
SOR
|
Contractor
|
|
Action level being exceeded by one sampling day
|
Repeat in situ measurement on
next day of exceedance to confirm findings;
Identify source(s) of impact;
Inform IEC, contractor and SOR;
Check monitoring data, all plant,
equipment and Contractor's
working methods.
|
Check monitoring data
submitted by ET and
Contractor’s working methods.
|
Confirm receipt of notification of non-compliance
in writing;
Notify Contractor.
|
Inform the SOR and confirm
notification of the non-compliance
in writing;
Rectify unacceptable practice;
Amend working methods if appropriate.
|
|
Action level being exceeded by two or more consecutive
sampling days
|
Repeat measurement on next day
of
exceedance to confirm findings;
Identify source(s) of impact;
Inform IEC, contractor, SOR and EPD;
Check monitoring data, all plant,
equipment and Contractor's
working methods;
Discuss mitigation measures with IEC, SOR and Contractor;
Ensure mitigation measures are implemented;
Increase the monitoring
frequency to daily until no
exceedance of Action level;
|
Check monitoring data
submitted by ET and
Contractor’s working method;
Discuss with ET and Contractor
on
possible remedial actions;
Review the proposed mitigation
measures submitted by
Contractor and advise the SOR accordingly;
Supervise the implementation of mitigation measures.
|
Discuss with IEC on the proposed mitigation measures;
Ensure mitigation measures are
properly implemented;
Assess the effectiveness of the
implemented mitigation measures.
|
Inform the Supervising
Officer and confirm notification of the non-compliance in writing;
Rectify unacceptable practice;
Check all plant and equipment and
consider changes of working methods;
Submit proposal of additional
mitigation measures to SOR within 3 working days of notification and discuss with ET, IEC and SOR;
Implement the agreed mitigation measures.
|
|
Limit level being exceeded by one sampling day
|
Repeat measurement on next day
of
exceedance to confirm findings;
Identify source(s) of impact;
Inform IEC, contractor, SOR and EPD;
Check monitoring data, all plant,
equipment and Contractor's
working methods;
Discuss mitigation measures with
IEC, SOR and Contractor;
|
Check monitoring data
submitted by ET and
Contractor’s working method;
Discuss with ET and Contractor
on
possible remedial actions;
Review the proposed mitigation
measures submitted by
Contractor and advise the SOR accordingly.
|
Confirm receipt of notification of failure in writing;
Discuss with IEC, ET and Contractor on the proposed mitigation measures;
Request Contractor to review the working methods.
|
Inform the SOR and confirm
notification of the non-compliance
in writing;
Rectify unacceptable practice;
Check all plant and equipment and
consider changes of working methods;
Submit proposal of mitigation
measures to SOR within 3 working days
of
notification and discuss with ET,
IEC and SOR.
|
|
Limit level being exceeded by two or more consecutive
sampling days
|
Repeat measurement on next day
of
exceedance to confirm findings;
Identify source(s) of impact;
Inform IEC, contractor, SOR and EPD;
Check monitoring data, all plant, equipment and Contractor's
working methods;
Discuss mitigation measures
with IEC, SOR and Contractor;
Ensure mitigation measures are
implemented;
Increase the monitoring
frequency to daily until no
exceedance of Limit level for
two consecutive days;
|
Check monitoring data
submitted by ET and
Contractor’s working method;
Discuss with ET and Contractor
on
possible remedial actions;
Review the Contractor’s
mitigation measures whenever necessary to assure their
effectiveness and advise the SOR accordingly;
Supervise the implementation of
mitigation measures.
|
Ensure mitigation measures are
properly implemented;
Consider and instruct, if necessary, the Contractor to slow down or to
stop all or part of the construction activities until no exceedance of Limit level.
|
Take immediate action to avoid
further exceedance;
Submit proposal of mitigation
measures to SOR within 3 working days
of
notification and discuss with ET,
IEC and SOR;
Implement the agreed mitigation measures;
Resubmit proposals of mitigation
measures if problem
still not under
control;
As directed
by the Supervising
Officer, to slow down or to stop all or part of the construction activities until no
exceedance of Limit level.
|
5
Ecology
Baseline
walk-over survey was carried out in September 2013 to confirm the existing
ecological conditions with reference to the habitat maps presented in the approved
EIA Report of the Project. In
accordance with requirements of the EM&A Manual, no
detailed ecological surveys of flora and fauna were undertaken for the baseline
walk-over survey.
5.1.1
Observations
With
reference to the habitat categorization in the approved EIA report, habitats
were classified into following ten (10) types (please also refer to Table 5.1):
Mixed Woodland
In
this walk over survey mixed woodland refer to both secondary woodland and
mature plantation woodland with reasonable proportion of native species and
typical woodland flora profile.
Tall Shrubland
Tall shrubland habitat is densely
populated with a mix of native tree and shrubby plant species.
Shrubby Grassland
The shrubby grassland is dominated by herbaceous ferns and grass
with shrubs and tree species that are patchily distributed on the hill-slopes
within the Study area.
Salt Marsh
Salt Marsh is those low-lying wet land that is influenced by
saltwater.
Plantation
In
this walk over survey, plantation refers to artificial planting area which
included man-made slope and roadside plantation for landscape and ornamental
use.
Cultivated Field
Cultivated field includes both active, inactive cultivation fields
and orchards.
Mangrove
Mangrove
refers to coastal vegetation which dominated by mangrove and mangrove
associated species.
Wasteland
Wasteland
is an open field which has dominated by weeds and pioneer species.
Watercourse
Watercourse
included both natural stream and modified stream.
Developed Area
Typical
developed areas within the Study area are the Airport Railway Deport, North Lantau Highway and Pak Mong Village.
Table 5.1 Types
of Habitats observed in Walk-over Survey
|
Mixed Woodland
|
Tall Shrubland
|
|
|
|
|
Shrubby Grassland
|
Salt Marsh
|
|
|
|
|
Plantation
|
Cultivated Field
|
|
|
|
|
Mangrove
|
Wasteland
|
|
|
|
|
Watercourse
|
Developed Area
|
|
|
|
5.1.2
Results
Habitats within Study Area
The
updated habitat map is presented in Figure 5.1. Larger area of tall shrubland
was identified within the Study area.
It is believed that they are developed from previous shrubby grassland
identified in approved EIA.
Woodland behind Pak Mong Village was defined as plantation woodland in
previous EIA. In this walk-over
survey, both mature native species and fruit tree species are well developed
into typical woodland profile.
Therefore, it is now classified as mixed woodland. Some of the orchard area and farmland
are now invaded by self-seeded plant indicating its inactive status. However, according the approved EIA
report both inactive and active are categorized as cultivated land. Thus only those believed to be abandoned
and developed into a stage that can fit the description of another types of
habitat mentioned above will be shown in the updated habitat map.
It
should be noted that mangrove area increased along the inner bay of Tai Ho Wan.
Habitats within Project Area
Habitat
types within the Project area are similar to the approved EIA report except
some of the man-made slope and landscape area that previously defined as
developed area are now classified as plantation because of its vegetation
coverage and maturity of development.
Flora Species of
Conservation Interest
This
walk-over survey also confirmed the existence of the flora species of
conservation interest according to the figure “Location of Species of
Conservation Interest Recorded in North Lantau
between 2003 to 2009” in approved EIA report. Most of them can be found within the Study
area except those grown in some inaccessible area (e.g. fence off area).
Baseline
dolphin monitoring was undertaken at Northwest Lantau (NWL) and Northeast Lantau
(NEL) under the Chinese White
Dolphin (CWD)
Service Contract No. HY/2011/02 for a period
of three months prior to the commencement of the
Contract. The baseline line-transect vessel surveys for dolphin monitoring were conducted in September,
October and November 2011 as shown in Table
5.2. Location of
dolphin transect survey is presented in Figure 5.2. Detailed monitoring results are
presented in Annex D.
Table 5.2 Date
of Baseline Dolphin Monitoring
|
No.
|
Date
|
Location
|
|
1
|
05/09/2011
|
W LANTAU + NW LANTAU
|
|
2
|
07/09/2011
|
NW LANTAU + NE LANTAU
|
|
3
|
16/09/2011
|
NW LANTAU + NE LANTAU
|
|
4
|
23/09/2011
|
W LANTAU + NW LANTAU
|
|
5
|
06/10/2011
|
NE LANTAU + NW LANTAU
|
|
6
|
10/10/2011
|
NW LANTAU +NE LANTAU
|
|
7
|
13/10/2011
|
NE LANTAU
|
|
8
|
17/10/2011
|
W LANTAU + NW LANTAU
|
|
9
|
28/10/2011
|
NW LANTAU + W LANTAU
|
|
10
|
01/11/2011
|
NW LANTAU +NE LANTAU
|
|
11
|
02/11/2011
|
W LANTAU + NE LANTAU
|
|
12
|
05/11/2011
|
NW LANTAU + NE LANTAU
|
|
13
|
06/11/2011
|
NE LANTAU
|
|
14
|
07/11/2011
|
NW LANTAU + W LANTAU
|
|
Notes:
* NW Lantau = Northwest Lantau Survey Area, NE Lantau = Northeast Lantau Survey Area, W Lantau = West Lantau
|
In total, 112 groups of Chinese White Dolphins,
numbering 413 individuals, were observed during the three-month survey. Most of them were sighted in the West Lantau (WL) and Northwest Lantau
(NWL) regions.
Major findings along and near the future alignments of
HKLR and TM-CLKL as well as the reclamation site of HKBCF (collectively called
“the Site” below) are summarized as follows:
Ÿ Dolphins were sighted but
not in high concentration near the Site;
Ÿ Several large dolphin
aggregations were seen near the Site;
Ÿ Several grids had moderate
to high dolphin density near the Site;
Ÿ