table
of Contents
1.1 Background
1.2 Scope
of Report
1.3 Organization
Structure
1.4 Summary
of Construction Works
1.5 Summary
of EM&A Programme Requirements
2.1 Monitoring
Requirements
2.2 Monitoring Equipment
2.3 Monitoring
Locations
2.4 Monitoring
Parameters & Frequency
2.5 Monitoring
methodology
2.6 Monitoring
Schedule for the Reporting Month
2.7 Results
and Observations
3.1 Monitoring
Requirements
3.2 Monitoring
equipment
3.3 Monitoring
Parameters, Frequency and Duration
3.4 Monitoring
Locations
3.5 Monitoring
methodology
3.6 Action
& Limit Levels
3.7 Monitoring
Schedule for the Reporting Month
3.8 Results
and Observations
4.1 Monitoring
Requirements
4.2 Monitoring
Equipment
4.3 Monitoring
Parameter, Frequencies & Duration
4.4 Monitoring
Location
4.5 Action & Limit
Levels
4.6 Monitoring
Schedule For The Reporting Month
4.7 Results
& Observations
5 Environmental
site inspection and audit
5.1 Site
Inspection
5.2 Waste
Management Status
5.3 Environmental
Licenses and Permits
5.4 Implementation
Status of Environmental Mitigation Measures
5.5 Summary
of Exceedances of the Environmental Quality Performance Limit
5.6 Summary
of Complaints, Notification of Summons and Successful Prosecutions
6.1 Construction
Programme for the Coming Months
6.2 Key
Issues for the Coming Month
6.3 Monitoring
Schedule for the Coming Month
7 Conclusions
and recommendations
7.1 Conclusions
7.2 Recommendations
Under Contract No. HY/2012/08,
Dragages ¡V Bouygues Joint Venture (DBJV) is
commissioned by the Highways Department (HyD) to
undertake the design and construction of the Northern Connection Sub-sea Tunnel
Section of the Tuen Mun ¡V Chek Lap Kok Link Project (TM-CLK
Link Project) while AECOM Asia Company Limited was appointed by HyD as the Supervising Officer. For implementation of the environmental
monitoring and audit (EM&A) programme under the
Contract, ERM-Hong Kong, Limited (ERM) has been appointed as the Environmental
Team (ET) in accordance with Environmental
Permit No. EP-354/2009/A. ENVIRON Hong Kong Ltd. was employed by HyD as the Independent Environmental Checker (IEC) and
Environmental Project Office (ENPO).
The
construction phase of the Project under the EP-354/2009/A
commenced on 1 November 2013 and will tentatively be completed by the end of
2018. The impact monitoring of the EM&A
programme, including air quality, noise, water
quality, marine ecological monitoring and environmental site inspections, were commenced
on 1 November 2013.
This
is the first monthly EM&A report presenting the EM&A works carried out
during the period from 1 to 31 November 2013 for the Contract No. HY/2012/08 Northern
Connection Sub-sea Tunnel Section (the ¡§Project¡¨) in
accordance with the Updated EM&A Manual of the TM-CLK
Link Project. As informed by the
Contractor, major activities in the reporting period included:
Marine-based Works
¡P Removal
of existing seawall;
¡P Dredging;
¡P Placement
of rock grade 400; and,
¡P Delivery
of 149 seawall blocks.
Land-based Works
¡P
Sorting of rock material started at Tsing Yi (WA 23
area); and,
¡P
Completion of chain-link fence, site hoarding works, site formation works (Site WA 18).
A summary of
monitoring and audit activities conducted in the reporting period is listed
below:
24-hour TSP
monitoring 5
sessions
1-hour TSP
monitoring 5
sessions
Impact Water
Quality Monitoring 14
sessions
Impact dolphin
monitoring 2
sessions
Joint
Environmental site inspection 4
sessions
Daily
marine mammal exclusion zone monitoring was undertaken during the period of
dredging activities undertaken. No
sighting of the Indo-Pacific humpback dolphin Sousa chinensis was recorded in November
2013 during the exclusion zone monitoring.
Summary of Breaches
of Action/Limit Levels
Breaches of Action and Limit Levels for Air Quality
Four exceedances of Action Level and one exceedance
of Limit Level for air quality were recorded during the reporting month. The exceedances
were considered not related to the construction works of this Contract upon
further investigation.
Breaches of Action and Limit Levels for Water Quality
No exceedances of Action and Limit Levels for water quality
were recorded during the reporting month.
Dolphin Monitoring
During this
month of dolphin monitoring, no adverse impact from the construction activities
of the TM-CLKL Northern Connection Sub-sea Tunnel Section on Chinese White
Dolphins was noticeable from general observations. Due to monthly variation in dolphin
occurrence within the study area, it would be more appropriate to draw
conclusion on whether any impacts on dolphins have been detected related to the
construction activities of the TM-CLKL Northern Connection Sub-sea Section in
the quarterly EM&A reports, where comparison on distribution, group size
and encounter rates of dolphins between the quarterly impact monitoring period
and baseline monitoring period will be made.
Environmental
Complaints, Non-compliance & Summons
No
non-compliance with EIA recommendations, EP conditions and other requirements associated with
the construction of the Contract was recorded in this reporting period.
No
environmental complaint was received in this reporting period.
No
environmental summons was received in this reporting period.
Reporting
Change
There was no
reporting change required in the reporting period.
Upcoming Works
for the Next Reporting Period
Works to be
undertaken in the next monitoring period of December 2013 include the
following:
Marine-based Works
¡P Seawall
construction;
¡P Removal
of existing seawall armour rock;
¡P Temporary
seawall;
¡P Additional
Ground investigation;
¡P Reclamation;
and,
¡P Temporary
pontoon installation at RTT.
Land-based Works
¡P Presonstruction for site
office (WA 18);
¡P Hoarding
erection & building demolition (Portion N6); and
¡P CLP
substation construction.
Future Key
Issues
Potential
environmental impacts arising from the above upcoming construction activities
in the next reporting month of December 2013 are mainly associated with dust,
marine water quality, marine ecology and waste management issues.
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 ¡V Zhuhai ¡V Macao Bridge (HZMB). In order to cope with the anticipated
traffic demand, two new road sections between NWNT and North Lantau ¡V Tuen Mun
¡V Chek Lap Kok Link
(TM-CLKL) and Tuen Mun
Western Bypass (TMWB) are proposed.
An
Environmental Impact Assessment (EIA) of TM-CLKL (the Project) 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/2012/08,
Dragages ¡V Bouygues Joint Venture (DBJV) is
commissioned by the Highways Department (HyD) to
undertake the design and construction of the Northern Connection Sub-sea Tunnel
Section of TM-CLKL (¡§the Contract¡¨) while AECOM Asia
Company Limited was appointed by HyD as the
Supervising Officer. For
implementation of the environmental monitoring and audit (EM&A) programme under the Contract, ERM-Hong Kong, Limited (ERM)
has been appointed as the Environmental Team (ET) in accordance with Environmental Permit No. EP-354/2009/A. ENVIRON
Hong Kong Ltd. was employed by HYD as the Independent Environmental Checker
(IEC) and Environmental Project Office (ENPO).
Layout of the
Contract components is presented in Figure 1.1.
The
organization structure of the Contract is shown in Appendix A. The key personnel contact names and contact
details are summarized in Table 1.1
below.
Table 1.1 Contact
Information of Key Personnel
Party |
Position |
Name |
Telephone |
Fax |
SOR (AECOM Asia
Company Limited) |
Chief
Resident Engineer |
Edwin
Ching Andrew
Westmoreland |
2450
3111 2450
3511 |
2450
3099 2450
3099 |
ENPO / IEC (ENVIRON
Hong Kong Ltd.) |
ENPO Leader |
Y.H. Hui |
3465 2888 |
3465 2899 |
IEC |
Tony Cheng |
3465 2888 |
3465 2899 |
|
Contractor (Dragages ¡V
Bouygues Joint Venture) |
Environmental
Manager |
C.F. Kwong |
2293
7322 |
2670
2798 |
Environmental
Officer 24hour
complaint hotline |
Bryan Lee Rachel Lam |
2293
7323 2293
7342 |
2670
2798 |
|
ET (ERM-HK) |
ET Leader |
Jovy Tam |
2271 3113 |
2723 5660 |
The EM&A programme required environmental monitoring for air quality,
water quality and marine ecology as well as environmental site inspections for
air quality, water quality, waste management, marine ecology and landscape and
visual impacts. The EM&A
requirements and related findings for each component are described in the
following sections, including:
¡P Monitoring
parameters;
¡P Monitoring
schedules for the reporting month and forthcoming month;
¡P Action
and Limit levels for all environmental parameters;
¡P Event
and Action Plan;
¡P Results
and observations;
¡P Environmental
mitigation measures, as recommended in the Project EIA reports; and,
¡P Environmental
requirement in contract documents.
In accordance
with the Updated EM&A Manual, baseline 1-hour and 24-hour TSP levels at five
(5) air quality monitoring stations were established. Impact 1-hour TSP monitoring was
conducted three (3) times every six (6) days while impact 24-hour TSP
monitoring was carried out once every six (6) days while the highest dust
impact was expected. The Action and
Limit Levels of the air quality monitoring is provided in Appendix D.
High volume
samplers (HVSs) were used to carry out the 1-hour and 24-hour TSP monitoring on
2, 7, 13, 19, 25 and 29 November 2013 at each designated monitoring station in
accordance with the requirements stipulated in the Updated EM&A Manual. Details of the equipment deployed are provided
in Table 2.1. Copies of the calibration certificates
for the equipment are presented in Appendix E.
Wind
data monitoring equipment was installed at the rooftop of ASR5 (Pillar Point
Fire Station) 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 Air
Quality Monitoring Equipment
Equipment |
Brand and Model |
High Volume Sampler |
Tisch Environmental Mass Flow Controlled Total Suspended Particulate (TSP)
High Volume Sampler (Model No. TE-5170) |
Wind Anemometer |
MetPak, WindSonic |
Air quality monitoring
stations ASR1 and ASR5 were set up at the proposed locations in accordance with
the Updated EM&A Manual. Three
additional monitoring stations, AQMS1, AQMS2 and ASR10 were also set up at the
designated locations in accordance with the Enhanced TSP Monitoring Plan ([1]).
AQMS2
is an alternative monitoring station for Butterfly Laundry which is an Air
Sensitive Receiver (ASR) (ie ASR6) identified in the
approved EIA Report. AQMS2 is being
proposed as a temporary alternative station for monitoring since access to
Butterfly Laundry is not granted to the ET at the moment to undertake the air
quality monitoring. Should access
be granted to the ET, air quality monitoring will be conducted at ASR6 (Butterfly
Laundry) instead of AQMS2 in the impact phase of air quality monitoring.
Figure 2.1 presents
the locations of all air quality 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 |
Monitoring Dates |
Description |
ASR1 |
Tuen Mun Fireboat Station |
2, 7, 13,
19, 25 and 29 November 2013 |
Office |
ASR5 |
Pillar Point
Fire Station |
Office |
|
AQMS1 |
Previous
River Trade Golf |
Bare ground |
|
AQMS2 |
Bare ground
at Ho Suen Street |
Bare ground |
|
ASR10 |
Butterfly
Beach Park |
Recreational
uses |
Table 2.3 summarized the monitoring parameters and frequency of
impact air quality monitoring.
Table 2.3 Parameters
and Monitoring Frequency of Air Quality Monitoring
Parameter |
Frequency and Duration |
1-hour TSP |
Three times per
day every six days while the highest dust impact was expected |
24-hour TSP |
Daily every six
days |
(a) The
HVS was installed in the vicinity of the air sensitive receivers. The following criteria were considered
in the installation of the HVS:
¡P
A horizontal platform with appropriate support to
secure the sampler against gusty wind was provided.
¡P
The distance between the HVS and an obstacle, such as
buildings, was at least twice the height that the obstacle protrudes above the
sampler.
¡P
A minimum of 2m of separation from walls, parapets and
penthouses was required for rooftop samples.
¡P
A minimum of 2m separation from any supporting
structure, measured horizontally was required.
¡P
No furnaces or incineration flues were nearby.
¡P
Airflow around the sampler was unrestricted.
¡P
The samplers were more than 20m from the drip line.
¡P
Any wire fence and gate, to protect the sampler,
should not cause any obstruction during monitoring.
¡P
Permission must be obtained to set up the samples and
to obtain access to the monitoring stations.
¡P
A secured supply of electricity is needed to operate
the samplers.
¡P
No two samplers should be placed less than 2 m apart.
(b) Preparation
of Filter Papers
¡P
Filter papers of size 8¡¨x 10¡¨ that were clean and
without pinholes were selected.
¡P
All filter papers were conditioned in a humidity
controlled chamber for over 24-hour and be pre-weighed before use for sampling.
¡P
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
¡P
The power supply was checked to ensure the HVS works
properly.
¡P
The filter holder and the area surrounding the filter
were cleaned.
¡P
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.
¡P
The filter was properly aligned on the screen so that
the gasket formed an airtight seal on the outer edges of the filter.
¡P
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.
¡P
Then the shelter lid was closed and was secured with
the aluminum strip.
¡P
The HVS was warmed up for about 5 minutes to establish
run-temperature conditions.
¡P
A new flow rate record sheet was set into the flow
recorder.
¡P
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 ¡V 1.7 m3/min).
¡P
The programmable digital timer was set for a sampling
period of 1 hour or 24 hours, and the starting time, weather condition and the
filter number were recorded.
¡P
The initial elapsed time was recorded.
¡P
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.
¡P
The final elapsed time was recorded.
¡P
The sampled filter was removed carefully and folded in
half-length so that only surfaces with collected particulate matter were in
contact.
¡P
It was then placed in a clean plastic envelop and
sealed.
¡P
All monitoring information was recorded on a standard
data sheet.
¡P
Filters were then sent to ALS Technichem
(HK) Pty Ltd. for analysis.
(d) Maintenance
and Calibration
¡P
The HVS and its accessories were maintained. Appropriate maintenance such as routine
motor brushes replacement and electrical wiring checking were made to ensure
that the equipment and necessary power supply are in good working condition.
¡P
All HVS were calibrated (five point calibration) using
Calibration Kit prior to the commencement of the baseline monitoring and
thereafter at bi-monthly intervals.
The schedule
for air quality monitoring in November 2013 is provided in Appendix F.
The monitoring
results for 1-hour TSP and 24-hour TSP are summarized in Tables 2.4 and 2.5,
respectively. Detail impact air
quality monitoring results and graphical presentations are presented in Appendix G.
Table 2.4 Summary
of 1-hour TSP Monitoring Results in this Reporting Period
|
Average (µg/m3) |
Range (µg/m3) |
Action Level (µg/m3) |
Limit Level (µg/m3) |
ASR 1 |
180 |
69 ¡V 363 |
331 |
500 |
ASR 5 |
231 |
85 ¡V 413 |
340 |
500 |
AQMS1 |
161 |
81 - 431 |
335 |
500 |
AQMS2 |
189 |
69 - 332 |
338 |
500 |
ASR10 |
179 |
60 - 645 |
337 |
500 |
Table 2.5 Summary
of 24-hour TSP Monitoring Results in this Reporting Period
|
Average (µg/m3) |
Range (µg/m3) |
Action Level (µg/m3) |
Limit Level (µg/m3) |
ASR 1 |
112 |
82 ¡V 143 |
213 |
260 |
ASR 5 |
145 |
100 ¡V 189 |
238 |
260 |
AQMS1 |
123 |
69 ¡V 197 |
213 |
260 |
AQMS2 |
141 |
99 ¡V 174 |
238 |
260 |
ASR10 |
80 |
53 ¡V 120 |
214 |
260 |
The major dust
sources in the reporting period include construction activities under the
Contract as well as nearby traffic emissions.
Exceedances of
Action and Limit levels on 1-hr TSP were observed on 7 and 19 November 2013. Upon further investigation, the exceedances were considered not related to the construction
works of this Contract after further investigation. Cumulative statistics of exceedances is presented in Appendix L.
The Event and Action
plan is presented in Appendix K.
Meteorological
information collected at the ASR5, including wind speed and wind direction, is provided
in Appendix H.
Impact water
quality monitoring was carried out three days per week during the construction
period, and impact water quality monitoring measurements were taken according
to the requirements stated in the Updated EM&A Manual of the Project. The Action and Limit Levels of the water
quality monitoring is provided in Appendix D.
Table 3.1 summarises the equipment
used in the impact water quality monitoring programme.
Table 3.3.1 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 |
Table 3.2 summarized the monitoring parameters, frequency and
duration of impact water quality monitoring.
Table
3.2 Water
Quality Monitoring Parameters and Frequency
Monitoring Stations |
Parameters, unit |
Depth |
Frequency |
IS12 IS13 IS14 IS15 CS4 CS6 SR8 SR9 SR10A |
Temperature(¢XC)
pH(pH unit)
Turbidity (NTU)
Water depth (m)
Salinity (ppt)
DO (mg/L and % of saturation)
SS (mg/L) |
3 water depths: 1m below sea surface, mid-depth and 1m above sea bed.
If the water depth is less than 3m, mid-depth sampling only. If water depth less than 6m, mid-depth
may be omitted. |
Impact monitoring: 3 days per week, at mid-flood and mid-ebb tides
during the construction period of the Contract. |
In
addition to the parameters presented in Table
3.3, monitoring location/position, time, water depth, sampling depth, tidal
stages, weather conditions and any special phenomena or works underway nearby were
also recorded.
The locations
of the monitoring stations under the Contract
are shown in Figure 3.1 and detailed
in Table 3.3.
Table 3.3 Locations
of Water Quality Monitoring Stations
Station ID |
Type |
Coordinates |
|
|
|
Easting |
Northing |
IS12 |
Impact
Station |
813218 |
823681 |
IS13 |
Impact Station |
813667 |
824325 |
IS14 |
Impact Station |
812592 |
824172 |
IS15 |
Impact Station |
813356 |
825008 |
CS4 |
Control /
Far Field Station |
810025 |
824004 |
CS6 |
Control /
Far Field Station |
817028 |
823992 |
SR8 |
Sensitive
receiver (Gazettal beaches in Tuen Mun) |
816306 |
825715 |
SR9 |
Sensitive
receiver |
813601 |
825858 |
SR10A |
Sensitive
receiver |
823741 |
823495 |
The in-situ water quality parameters, i.e.
dissolved oxygen, temperature and salinity were measured by multi-parameter Water
Quality System (Model YSI 6820-C-M/YSI 6920).
Digital Differential Global Positioning Systems (DGPS) were used to
ensure that the correct location was selected prior to sample collection.
Portable, battery-operated echo sounders were used for the determination
of water depth at each designated monitoring station.
All in-situ measurements were
taken at 3 water depths, 1 m below water surface, mid-depth and 1 m above sea
bed, except where the water depth was less than 6 m, for which the mid-depth
station was omitted. Should the
water depth be less than 3 m, only the mid-depth station was monitored.
At each measurement / sampling depth, two consecutive in-situ measurements (DO concentration
and saturation, temperature, turbidity, pH and salinity) and water samples for
SS 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 DO or
turbidity parameters was more than 25% of the value of the first reading, the
reading was discarded and further readings were taken.
Duplicate samples were collected at each sampling depth for SS
measurement in the laboratory.
Water samples were collected using the water samplers and the samples
were stored in high-density polythene bottles. Water samples collected were well-mixed
in the water sampler prior to pre-rinsing and transferring to sample
bottles. Samples bottles were
pre-rinsed with the same water samples.
The sample bottles were then packed in cool-boxes (cooled at 4¢XC)
without being frozen) and delivered to ALS Technichem
(HK) Pty Ltd. for the analysis of SS concentrations. The laboratory determination work would
be started within 24 hours after collection of the water samples. ALS Technichem
(HK) Pty Ltd. is a HOKLAS accredited laboratory and has comprehensive QA/QC programme. For
QA/QC procedures, one sample of every batch of 20 samples was analyzed.
The analysis method and reporting and
detection limit for SS is shown in Table 3.4.
Table 3.4 Laboratory Analysis for
Suspended Solids
Parameters |
Instrumentation |
Analytical Method |
Reporting
Limit |
Detection
Limit |
Suspended Solid (SS) |
Weighing |
APHA 2540-D |
0.5 mg/L |
0.5 mg/L |
Other relevant data were recorded, including monitoring location/
position, time, water depth, tidal stages, weather conditions and any special
phenomena or work underway at the construction site in the field log sheet for
information.
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. Copies
of the calibration certificates are attached in Appendix E.
The Action and
Limit Levels for water quality monitoring are summarized in Table 3.5.
Table 3.5 Action
Limit Levels for Water Quality Monitoring
Parameter |
Action Level# |
Limit Level# |
DO in mg/L (a) |
Surface and Middle |
Surface and Middle |
|
5.0 mg/L |
4.2 mg/L |
|
Bottom |
Bottom |
|
4.7 mg/L |
3.6 mg/L |
Turbidity in NTU (Depth-averaged (b), (c)) |
120% of upstream control station at the same tide of
the same day and 95%-ile of baseline data, i.e., 27.5 NTU |
130% of upstream control station at the same tide of
the same day and 99%-ile of baseline data, i.e., 47.0 NTU |
SS in mg/L (Depth-averaged (b), (c)) |
120% of upstream control station at the same tide of
the same day and 95%-ile of baseline data, i.e., 23.5 mg/L |
130% of upstream control station at the same tide of
the same day and 10mg/L for WSD Seawater Intakes at Tuen
Mun and 99%-ile of
baseline data, i.e., 34.4 mg/L |
Notes: |
|
|
# Baseline data: data from HKZMB Baseline Water
Quality Monitoring between 6 and 31 October 2011. |
||
(a)
For DO, non-compliance of the water quality limits occurs when
monitoring result is lower than the limits. |
||
(b)
¡§Depth-averaged¡¨ is calculated by taking the arithmetic means of
reading of all three depths |
||
(c)
For turbidity and SS, non-compliance of the water quality limits
occurs when monitoring result is higher than the limits. |
||
(d)
All figures given in the table are used for reference only, and EPD
may amend the figures whenever it is considered as necessary |
||
(e)
The 1%-ile of baseline data for surface and
middle DO is 4.2 mg/L, whilst for bottom DO is 3.6 mg/L. |
Should
non-compliance of the criteria occur, action in accordance with the Event and
Action Plan, as provided in Appendix K should be
carried out.
The schedule
for water quality monitoring in November 2013 is provided in Appendix F.
Impact water
quality monitoring was conducted at all designated monitoring stations in the
reporting month. Detailed impact
water quality monitoring results are presented in Appendix G.
No exceedances of Action and Limit levels were recorded for
water quality monitoring in the reporting month.
Impact dolphin
monitoring is required to be conducted by a qualified dolphin specialist team
to evaluate whether there have been any effects on the dolphins. Dolphin monitoring works by line
transect methodology is required to carry out in accordance with the Updated
EM&A Manual of the TM-CLK Link
Project. In order to fulfil the
EM&A requirements and make good use of available resources, the on-going
impact line transect dolphin monitoring data collected by HyD¡¦s
Contract No. HY/2011/03 Hong Kong-Zhuhai-Macao Bridge. Hong
Kong Link Road - Section between Scenic Hill and Hong Kong Boundary Crossing
Facilities on the monthly basis is adopted to avoid duplicates of survey
effort.
Table 4.1 summarises the equipment
used for the impact dolphin monitoring.
Table 4.1 Dolphin
Monitoring Equipment
Equipment |
Model |
Global Positioning
System (GPS) Camera Laser Binoculars Marine Binocular Vessel for Monitoring |
Garmin 18X-PC Geo One Phottix Nikon D90 300m 2.8D fixed focus Nikon D90 20-300m zoom lens Infinitor LRF 1000 Bushell 7 x 50 marine binocular with compass and
reticules 65 foot single
engine motor vessel with viewing platform 4.5m above water level |
|
|
Dolphin
monitoring should cover all transect lines in Northeast Lantau
(NEL) and the Northwest Lantau (NWL) survey areas
twice per month throughout the entire construction period. The monitoring data should be compatible
with, and should be made available for, long-term studies of small cetacean
ecology in Hong Kong. In order to
provide a suitable long-term dataset for comparison, identical methodology and
line transects employed in baseline dolphin monitoring was followed in the
impact dolphin monitoring.
The impact
dolphin monitoring was carried out in the NEL and NWL along the line transect
as depicted in Figure 4.1. The co-ordinates of all transect lines
are shown in Table 4.2 below.
Table 4.2 Impact
Dolphin Monitoring Line Transect Co-ordinates
Line
No. |
Easting |
Northing |
Line
No. |
Easting |
Northing |
||
1 |
Start
Point |
804671 |
814577 |
13 |
Start
Point |
816506 |
819480 |
1 |
End
Point |
804671 |
831404 |
13 |
End
Point |
816506 |
824859 |
2 |
Start
Point |
805475 |
815457 |
14 |
Start
Point |
817537 |
820220 |
2 |
End
Point |
805477 |
826654 |
14 |
End
Point |
817537 |
824613 |
3 |
Start
Point |
806464 |
819435 |
15 |
Start
Point |
818568 |
820735 |
3 |
End
Point |
806464 |
822911 |
15 |
End
Point |
818568 |
824433 |
4 |
Start
Point |
807518 |
819771 |
16 |
Start
Point |
819532 |
821420 |
4 |
End
Point |
807518 |
829230 |
16 |
End
Point |
819532 |
824209 |
5 |
Start
Point |
808504 |
820220 |
17 |
Start
Point |
820451 |
822125 |
5 |
End
Point |
808504 |
828602 |
17 |
End
Point |
820451 |
823671 |
6 |
Start
Point |
809490 |
820466 |
18 |
Start
Point |
821504 |
822371 |
6 |
End
Point |
809490 |
825352 |
18 |
End
Point |
821504 |
823761 |
7 |
Start
Point |
810499 |
820690 |
19 |
Start
Point |
822513 |
823268 |
7 |
End
Point |
810499 |
824613 |
19 |
End
Point |
822513 |
824321 |
8 |
Start
Point |
811508 |
820847 |
20 |
Start
Point |
823477 |
823402 |
8 |
End
Point |
811508 |
824254 |
20 |
End
Point |
823477 |
824613 |
9 |
Start
Point |
812516 |
820892 |
21 |
Start
Point |
805476 |
827081 |
9 |
End
Point |
812516 |
824254 |
21 |
End
Point |
805476 |
830562 |
10 |
Start
Point |
813525 |
820872 |
22 |
Start
Point |
806464 |
824033 |
10 |
End
Point |
813525 |
824657 |
22 |
End
Point |
806464 |
829598 |
11 |
Start
Point |
814556 |
818449 |
23 |
Start
Point |
814559 |
821739 |
11 |
End
Point |
814556 |
820992 |
23 |
End
Point |
814559 |
824768 |
12 |
Start
Point |
815542 |
818807 |
|
|
|
|
12 |
End
Point |
815542 |
824882 |
|
|
|
|
The action and
limit levels of dolphin impact monitoring are shown in Tables 4.3 & 4.4.
Table 4.3 Action
Level and Limit Level for Dolphin Impact Monitoring
|
North Lantau
Social Cluster |
|
|
NEL |
NWL |
Action Level |
STG
< 70% of baseline & |
STG
< 70% of baseline & |
Limit Level |
[STG < 40% of baseline & ANI
< 40% of baseline] and STG < 40% of baseline & ANI
< 40% of baseline |
|
Notes: 1.
STG
means quarterly encounter rate of number of dolphin sightings, which is 6.00
in NEL and 9.85 in NWL during the baseline monitoring period 2.
ANI
means quarterly encounter rate of total number of dolphins, which is 22.19
in NEL and 44.66 in NWL during the baseline monitoring period 3.
For
North Lantau Social Cluster, AL will be trigger if
NEL or NWL fall below the criteria; LL will be triggered if both NEL and NWL
fall below the criteria. |
Table 4.4 Derived
Value of Action Level (AL) and Limit Level(LL)
|
North Lantau Social Cluster |
|
|
NEL |
NWL |
Action
Level |
STG
< 4.2 & ANI< 15.5 |
STG
< 6.9 & ANI < 31.3 |
Limit
Level |
[STG < 2.4 & ANI <8.9] and [STG < 3.9 & ANI <17.9] |
Dolphin
monitoring was carried out on 1, 5, 8 and 13 November 2013. The dolphin monitoring schedule for the
reporting period is shown in Appendix F.
A total of
268.17 km of survey effort was collected, with 100% of the total survey effort
being conducted under favourable weather conditions (ie Beaufort Sea State 3 or below with good visibility) in
November 2013. Amongst the two
areas, 98.97 km and 169.20 km of survey effort were collected from NEL and NWL
survey areas, respectively. The
total survey effort conducted on primary and secondary lines were 211.85 km and
56.32 km, respectively. The survey efforts
are summarized in Appendix J.
A total of
twenty-one dolphin sightings were recorded during the two surveys. All sightings were made in NWL during the
two sets of surveys in November, with no sightings made at all in NEL.
None of the 21
sightings was made in the proximity of this Project. The distribution of dolphin sightings
during the reporting month is shown in Figure 4.2.
Encounter
rates of Chinese White Dolphins are deduced from the survey effort and
on-effort sighting data made under favourable
conditions (Beaufort 3 or below) in November 2013 with the results present in Tables 4.5 and 4.6.
Table 4.5 Individual
Survey Event Encounter Rates
|
Encounter rate (STG) (no. of on-effort dolphin sightings per 100 km of survey effort) |
Encounter rate (ANI)
(no. of dolphins from all on-effort sightings per
100 km of survey effort) |
|
Primary Lines Only |
Primary Lines Only |
||
NEL |
Set 1: Nov 1st/5th |
0.0 |
0.0 |
Set 2: Nov 8th/13th |
0.0 |
0.0 |
|
NWL |
Set 1: Nov 1st/5th |
10.3 |
50.0 |
Set 2: Nov 8th/13th |
16.1 |
76.1 |
Note:
Dolphin Encounter Rates
are deduced from the Two Sets of Surveys (Two Surveys in Each Set) in November
2013 in Northeast (NEL) and Northwest Lantau
(NWL)
Table 4.6 Monthly
Average Encounter Rates
|
Encounter rate (STG)
(no. of on-effort dolphin sightings per
100 km of survey effort) |
Encounter rate (ANI)
(no. of dolphins from all on-effort sightings per 100 km of survey
effort) |
||
Primary Lines Only |
Both Primary and Secondary Lines |
Primary Lines Only |
Both Primary and Secondary Lines |
|
Northeast Lantau |
0.0 |
0.0 |
0.0 |
0.0 |
Northwest Lantau |
13.2 |
11.2 |
63.1 |
53.2 |
Note: Overall dolphin encounter rates (sightings per
100km of survey effort) from all four surveys are conducted in November 2013 on
primary lines only as well as both primary lines and secondary lines in
Northeast and Northwest Lantau.
The average group size of Chinese
White Dolphins in November 2013 was 4.86 individuals per group. Twelve dolphin groups were composed of
only 1-4 animals, while the other nine were larger groups with 5-11 animals per
group.
During this
month of dolphin monitoring, no adverse impact from the construction activities
of this Project was recorded from the general observations.
Due to monthly
variation in dolphin occurrence within the survey area, it would be more
appropriate to draw conclusion on whether any impacts on dolphins have been
detected related to the construction activities of this Project in the
quarterly EM&A reports, where comparison on distribution, group size and
encounter rates of dolphins between the quarterly impact monitoring period and
baseline monitoring period will be made.
Taking into
account of natural seasonal change in distribution patterns, which is also
observed in baseline monitoring, it is suggested that a longer period of impact
monitoring data should be obtained for comparison.
The Event and
Action plan is presented in Appendix K.
Daily 250 m marine
mammal exclusion zone monitoring was undertaken during the period of dredging
activities being undertaken. No sighting of the Indo-Pacific
humpback dolphin Sousa chinensis were
recorded in November 2013 during the exclusion zone monitoring.
Site
inspections were carried out on a weekly basis to monitor the implementation of
proper environmental pollution control and mitigation measures under the
Contract. In the reporting month, four
(4) site inspections were carried out on 5, 12, 20 and 27 November 2013.
Particular
observations during the site inspections are described below:
The Contractor
was reminded to cover the temporary stockpiles at site WA 23 properly when
piling is completed.
No adverse
observation was identified in the reporting month.
At site WA 23,
residual sandy materials was found leaving at the edge of loading area which
may lead to surface runoff in the vicinity.
At site WA 18,
sandy materials were observed near the drainage area.
Sediment flow
was observed outside the cage-type silt curtain in the dredging site of barge
GD1.
Pre-translocation survey
at Yam Tsai Wan was conducted on 19 October 2013 and the subsequent coral
translocation and audit survey was carried out at Pillar Point and Yam Tsai Wan
between 21 and 23 October 2013. The
post-translocation monitoring is scheduled in January 2014.
Daily 250 m marine
mammal exclusion zone monitoring was undertaken during the period of dredging
activities being undertaken. No
sighting of the Indo-Pacific humpback dolphin Sousa chinensis were
recorded in November 2013 during the exclusion zone monitoring. In addition, acoustic decoupling monitoring
and marine vessel control for dredging works were implemented in this reporting
month.
At site WA 18,
drip tray stopper was found missing and stagnant of water was found in the drip
tray.
At site WA 18,
several oil drums were observed without chemical labels.
Oil stain was
observed on the barge (Dredging barge GD-1).
Drip tray
should be provided for the chemical containers (Dredging barge GD-1)
No adverse
observation was identified in the reporting month.
The
Environmental Permit should be displayed conspicuously in the site entrance
(Site WA 23).
The Contractor
has rectified most of the observations as identified during environmental site
inspection in the reporting month. Rectifications
of remaining identified items are undertaken by the Contractor. Follow-up inspections on the status on
provision of mitigation measures will be conducted to ensure all identified
items are mitigated properly.
The Contractor
had submitted application form for registration as chemical waste producer under
the Contract. Sufficient numbers of
receptacles were available for general refuse collection and sorting.
As
advised by the Contractor, 2,835 tonnes of inert
C&D Materials are generated and disposed of as public fill in the reporting
period. 21,100m3 of
marine sediment (Catergory L) and 13,200m3
of marine sediment (Catergory M) are generated and
disposed of at designated sites. Monthly
summary of waste flow table is detailed in Appendix M.
The Contractor
is advised to properly maintain on site C&D materials and waste collection,
sorting and recording system, dispose of C&D materials and wastes at
designated ground and maximize reuse/ recycle of C&D materials and
wastes. The Contractor is reminded
to properly maintain the site tidiness and dispose of the wastes accumulated on
site regularly and properly.
The Contractor
is reminded that chemical waste containers should be properly treated and
stored temporarily in designated chemical waste storage area on site in
accordance with the Code of Practice on the Packaging, Labelling and Storage of
Chemical Wastes.
The status of
environmental licensing and permit is summarized in Table 5.1 below.
Table 5.1 Summary
of Environmental Licensing and Permit Status
Statutory Reference |
License/
Permit |
License
or Permit No. |
Date
of Issue |
Date
of Expiry |
License/ Permit Holder |
Remarks |
EIAO |
Environmental Permit |
EP-354/2009/A |
8 Dec 2010 |
NA |
HyD |
Tuen Mun- Chek Lap Kok Link |
NCO |
Construction Dust Notification |
363510 |
19 Aug 2013 |
NA |
DBJV |
- |
WDO |
Chemical Waste Registration |
5213-422-D2516-01 |
10 Sep 2013 |
NA |
DBJV |
|
WDO |
Construction Waste Disposal Account |
7018108 |
19 Aug 2013 |
NA |
DBJV |
Waste disposal in Contract HY/2012/08 |
WPCO |
Waste Water Discharge License |
Nil |
18 Nov 2013 |
30 Nov 2018 |
DBJV |
Discharge of Construction Runoff |
NCO |
Construction Noise Permit |
GW-RW0691-13 |
15 Oct 2013 |
14 Apr 2014 |
DBJV |
For Dredging and Reclamation Works |
NCO |
Construction Noise Permit |
GW-RW0822-13 |
14 Nov 2013 |
10 May 2014 |
DBJV |
For works in site WA18 |
NCO |
Construction Noise Permit |
GW-RS0814-13 |
15 Nov 2013 |
10 May 2014 |
DBJV |
For works in site WA23 |
DASO |
Marine Dumping Permit |
EP/MD/14-072 |
1 Nov 2013 |
30 Apr 2014 |
DBJV |
For Type 1 |
DASO |
Marine Dumping Permit |
EP/MD/14-071 |
1 Dec 2013 |
31 Dec 2013 |
DBJV |
For Type 1 (Dedicated site) and Type
2 |
In response to
the site audit findings, the Contractors carried out corrective actions.
A summary of
the Implementation Schedule of Environmental Mitigation Measures (EMIS) is
presented in Appendix C. The necessary mitigation measures relevant
to this Project were implemented properly.
Results for
water quality monitoring complied with the Action/ Limit levels in the
reporting period. No exceedances of Action and Limit levels were recorded for
water quality monitoring during the reporting month. Four exceedances
of Action level and one exceedance of Limit Level for
1-hour TSP of air quality were recorded during the reporting month. The exceedances
were considered not related to the construction works of this Contract after
further investigation.
Cumulative
statistics on exceedances is provided in Appendix L.
The
Environmental Complaint Handling Procedure is provided in Figure 5.1.
No complaints,
notification of summons and prosecution were received in the reporting period.
Statistics on
complaints, notifications of summons and successful prosecutions are summarized
in Appendix L.
As informed by
the Contractor, the major works for the Project in December 2013 will be:
Marine-based Works
¡P Seawall
construction;
¡P Removal
of existing seawall armour rock;
¡P Temporary
seawall;
¡P Additional
Ground investigation;
¡P Reclamation;
and
¡P Temporary
pontoon installation at RTT.
Land-based Works
¡P Pre-csonstruction for site office (WA 18);
¡P Hoarding
erection & building demolition (Portion N6); and
¡P CLP
substation construction.
Potential
environmental impacts arising from the above upcoming construction activities
in the next reporting month of December 2013 are mainly associated with dust,
marine water quality, marine ecology and waste management issues.
The tentative
schedule for environmental monitoring in December 2013 is provided in Appendix F.
The
construction phase of the TM-CLKL Northern Connection Sub-sea Tunnel Section
and the associated impact phase EM&A programme commenced on 1 November
2013.
1-hour TSP,
24-hour TSP, water quality and dolphin monitoring were carried out in the
reporting period.
The monitoring
results generally complied with the Action/ Limit levels in the reporting
period, except that four exceedances of Action
level and one exceedance of Limit Level for air
quality were recorded. The exceedances were considered not related to the construction
works of this Contract after further investigation.
A total of
twenty-one dolphin s sighting were recorded during the two surveys. All sightings were made in NWL during the
two sets of surveys with no sightings made at all in NEL in November 2013. None of the 21 sightings was made in the
proximity of the TM-CLKL Northern Connection Sub-sea Tunnel Section. During this
month of dolphin monitoring, no adverse impact from the construction activities
of the TM-CLKL Northern Connection Sub-sea Tunnel Section on Chinese White
Dolphins was noticeable from general observations.
Environmental
site inspection was carried out four (4) times in November 2013. Recommendations on remedial actions were
given to the Contractor for the deficiencies identified during the site audits.
Four (4)
Action Level and one (1) Limit Level exceedances for
1-hour TSP of during air quality monitoring were recorded in the reporting
month. Investigation works show
that the exceedance was not due to the Project works.
Nevertheless, the Contractor was
reminded to ensure all dust mitigation measures are provided at the
construction site.
According to
the environmental site inspections performed in the reporting month, the
following recommendations were provided:
Temporary
stockpiles at the works area should be properly covered by the Contactor when
piling is completed.
Measures
should be undertaken by the Contractor to avoid residual sandy materials
leaving from at the edge of loading area which may lead to surface runoff in
the vicinity.
The Contractor
should avoid sandy materials from entering the drainage area.
The Contractor
should ensure that the dredging is undertaken properly to avoid spillage
outside the cage-type silt curtain in the dredging site of barge GD1.
The Contractor
should install drip tray stopper and clear water stagnant in the drip
tray.
The Contractor
should proper label the oil drums.
The Contractor
should clear oil stain on the barge.
Drip tray
should be provided by the Contractor for the chemical containers
Daily 250 m marine
mammal exclusion zone monitoring was undertaken during the period of dredging
activities being undertaken. No sighting of the Indo-Pacific
humpback dolphin Sousa chinensis were
recorded in November 2013 during the exclusion zone monitoring.
The
Environmental Permit should be displayed conspicuously in the site entrance by
the Contractor.