TABLE OF CONTENTS
1.4 Summary of
Construction Works
1.5 Summary of
EM&A Programme Requirements
2.4 Monitoring
Parameters, Frequency and Duration
2.6 Monitoring
Schedule for the Reporting Month
3.4 Monitoring
Parameters, Frequency and Duration
3.6 Monitoring
Schedule for the Reporting Month
4.3 Monitoring
Parameters, Frequency and Duration
4.6 Monitoring
Schedule for the Reporting Month
5.3 Monitoring
Frequency and Conditions
5.4 Monitoring
Methodology and Location
5.6 Monitoring
Schedule for the Reporting Month
6 ENVIRONMENTAL
SITE INSPECTION AND AUDIT
6.2 Advice on the
Solid and Liquid Waste Management Status
6.3 Environmental
Licenses and Permits
6.4 Implementation
Status of Environmental Mitigation Measures
6.5 Summary of
Exceedances of the Environmental Quality Performance Limit
6.6 Summary of
Complaints, Notification of Summons and Successful Prosecutions
7.1 Construction
Programme for the Coming Months
7.2 Key Issues
for the Coming Month
7.3 Monitoring
Schedule for the Coming Month
8 ConclusionS AND RECOMMENDATIONS
List of
Tables
Table 1.1 Contact Information of Key Personnel
Table 2.1 Air Quality Monitoring
Equipment
Table 2.2 Locations of Impact Air
Quality Monitoring Stations
Table 2.3 Air Quality Monitoring
Parameters, Frequency and Duration
Table 2.4 Summary of 1-hour TSP
Monitoring Results in the Reporting Period
Table 2.5 Summary of 24-hour TSP
Monitoring Results in the Reporting Period
Table 3.1 Noise Monitoring
Equipment
Table 3.2 Locations of Impact Noise
Monitoring Stations
Table 3.3 Noise Monitoring
Parameters, Frequency and Duration
Table 3.4 Summary of Construction
Noise Monitoring Results in the Reporting Period
Table 4.1 Water Quality Monitoring
Equipment
Table 4.2 Impact Water Quality
Monitoring Parameters and Frequency
Table 4.3 Impact Water Quality
Monitoring Stations
Table 4.4 Laboratory Analysis for
Suspended Solids
Table 4.5 Summary of Water Quality
Exceedances
Table 5.1 Dolphin Monitoring
Equipment
Table 5.2 Impact Dolphin Monitoring
Line Transect Co-ordinates (Provided by AFCD)
Table 5.3 Impact Dolphin Monitoring
Survey Effort Summary, Effort by Area and Beaufort Sea State
Table 5.4 Impact Dolphin Monitoring
Survey Details in October 2013
Table 5.5 The Encounter
Rate of Number of Dolphin Sightings & Total Number of
Dolphins per Area^
Table 6.1 Summary of Environmental Licensing and Permit Status
Figures
Figure 1 General
Project Layout Plan
Figure
2 Impact
Air Quality and Noise Monitoring Stations and Wind
Station
Figure
3 Impact
Water Quality Monitoring Stations
Figure
4 Impact
Dolphin Monitoring Line Transect Layout Map
Figure
5 Impact
Dolphin Monitoring Survey Efforts and Sightings in October 2013
Figure 6 Environmental
Complaint Handling Procedure
List of Appendices
Appendix
A Project
Organization for Environmental Works
Appendix B Three Month
Rolling Construction Programmes
Appendix
C Implementation
Schedule of Environmental Mitigation Measures (EMIS)
Appendix D Summary of Action
and Limit Levels
Appendix E Calibration Certificates of
Monitoring Equipments
Appendix
F EM&A
Monitoring Schedules
Appendix
G Impact Air
Quality Monitoring Results and their Graphical Presentation
Appendix H Meteorological Data for Monitoring
Periods on Monitoring Dates in October
2013
Appendix
I Impact
Construction Noise Monitoring Results and their Graphical Presentation
Appendix J Impact
Water Quality Monitoring Results and their
Graphical Presentation
Appendix
K Impact
Dolphin Monitoring Survey Sighting Summary
Appendix
M Monthly
Summary of Waste Flow Table
This report documents the findings of EM&A works conducted in the period between 1 and 31 October 2013. As informed by the Contractor, major activities in the reporting period were:-
Marine-based
Works
-
Marine-base
-
Cellular structure installation
-
Connecting arc cell installation
-
Laying geo-textile
-
Sand blanket laying
-
Sand filling
-
Maintenance of silt curtain & silt screen at sea water
intake of HKIA
-
Stone column installation
-
Band drain installation
-
Backfill cellular structure
-
Geotechnical Instrumentation works
-
Rubble mound seawall construction
-
Construction of temporary seawall
-
Ground investigation
Land-based
Works
-
Maintenance works of Site Office at Works Area WA2
-
Maintenance works of Public Works Regional Laboratory
at Works Area WA3
-
Geo-textile fabrication at Works Area WA2
-
Silt curtain fabrication at Works Area WA4
-
Maintenance of Temporary Marine Access at Works Area WA2
A summary of monitoring and audit
activities conducted in the reporting period is listed below:
24-hour Total Suspended
Particulates (TSP) monitoring 1-hour TSP monitoring |
6 sessions 6 sessions |
Noise monitoring |
4 sessions |
Impact water quality
monitoring |
13 sessions |
Impact dolphin monitoring |
2 surveys |
Joint Environmental site
inspection |
5
sessions |
Breaches of
Action and Limit Levels for Air Quality
Breaches of
Action and Limit Levels for Noise
Breaches of
Action and Limit Levels for Water Quality
Seven (7) Action Level and two (2) Limit Level exceedances were recorded at measured suspended
solids (SS) values (in mg/L) in the reporting month. Investigation results show
that the exceedances were not
related to Project.
A total
of sixteen dolphin
sightings were recorded during the two surveys, nine on 15 October 2013,
seven on 24 October 2013, no sightings were made on 17 and 28 October 2013. Of the sixteen sightings, eleven were ¡§on effort¡¨ (which are all
under favourable condition) and five were ¡§opportunistic¡¨. A total of fifty three individuals were sighted from the
two impact dolphin surveys in the reporting period. Sighting details are summarised and plotted in Appendix K and Figure 5c,
respectively.
Complaint,
Notification of Summons and Successful Prosecution
As
informed by the Contractor, one follow up enquiry of the same issue mentioned
in a complaint reported in the EM&A report (Sept 13) was logged by the
Contractor on 9 Oct 2013. The enquirer expressed concern of the leakage from
work barges causing water pollution at sea near Tuen Mun Richland Garden and the impact of fishery activities.
The
complaint reported in the EM&A report (Sept 13) regarding the leakage from
work barges causing water pollution near Tuen Mun Richland Garden was followed up and information shown
that all project related vessels (including sand barges) are designated with a
regular marine travel route to the site, but the regular travel route plan of
this project does not specify the travel route passing through the Tuen Mun Butterfly Beach area. Information shown that all sand
barges will not conduct sand filling activities at area outside HKBCF site
boundary and all vessels have regular maintenance to ensure that all Sand Barge
functioning well.
Although
with refer to the available information such as photo record of the incident cannot indicate that the leakage
from work barges was caused by the vessel of this Contract and the complaint could not be
concluded as project related.
The
Contractor was advised to ensure the regular travel routes for all project
related vessels (including sand barges) were being strictly followed, all sand
barges do not conduct sand filling activities at area outside HKBCF site
boundary and all vessels have regular maintenance to ensure that all Sand Barge
functioning well.
Reporting
Change
There was
no reporting change required in the reporting period.
Future Key Issues
Key issues to be
considered in the coming month included:-
-
Site runoff should be properly collected and treated prior
to discharge;
-
Minimize loss of sediment from filling works;
-
Regular review and maintenance of silt curtain systems,
drainage systems and desilting facilities;
-
Exposed surfaces/soil stockpiles should be properly treated
to avoid generation of silty surface run-off during
rainstorm;
-
Regular review and maintenance of wheel washing facilities
provided at all site entrances/exits;
-
Conduct regular inspection of various working machineries
and vessels within works areas to avoid any dark smoke emission;
-
Suppress dust generated from work processes with use of
bagged cements, earth movements, excavation activities, exposed surfaces/soil
stockpiles and haul road traffic;
-
Quieter powered mechanical equipment should be used;
-
Provision of proper and effective noise control measures for
operating equipment and machinery on-site, such as erection of movable noise
barriers or enclosure for noisy plants;
-
Closely check and replace the sound insulation materials
regularly;
-
Better scheduling of construction works to minimize noise
nuisance;
-
Properly store and label oil drums and chemical containers
placed on site;
-
Proper chemicals, chemical wastes and wastes management;
-
Maintenance works should be carried out within roofed, paved
and confined areas;
-
Collection and segregation of construction waste and general
refuse on land and in the sea should be carried out properly and regularly; and
-
Proper protection and regular inspection of existing trees,
transplanted/retained trees.
Table 1.1 Contact Information of Key Personnel
Party |
Position |
Name |
Telephone |
Fax |
Engineer¡¦s
Representative (ER) (Ove Arup & Partners Hong Kong
Limited) |
Chief Resident Engineer |
Roger Marechal |
3698 5700 |
2698 5999 |
IEC / ENPO (ENVIRON Hong Kong
Limited) |
Independent Environmental
Checker |
Raymond Dai |
3465 2868 |
3465 2899 |
Environmental Project Office
Leader |
Y. H. Hui |
3465 2868 |
3465 2899 |
|
Contractor (China Harbour Engineering Company Limited) |
General Manager (S&E) |
Daniel Leung |
3157 1086 |
2578 0413 |
Environmental Officer |
Richard Ng |
36932253 |
2578 0413 |
|
24-hour Hotline |
Alan C.C. Yeung |
9448 0325 |
-- |
|
ET (AECOM Asia Company Limited) |
ET Leader |
Echo Leong |
3922 9280 |
2317 7609 |
Marine-based Works
-
Cellular structure installation
-
Connecting arc cell installation
-
Laying geo-textile
-
Sand blanket laying
-
Sand filling
-
Maintenance of silt curtain & silt screen at sea water
intake of HKIA
-
Stone column installation
-
Band drain installation
-
Backfill cellular structure
-
Instrumentation works
-
Rubble mound seawall construction
-
Construction of temporary seawall
-
Ground investigation
Land-based Works
-
Maintenance works of Site Office at Works Area WA2
-
Maintenance works of Public Works Regional Laboratory
at Works Area WA3
-
Geo-textile fabrication at Works Area WA2
-
Silt curtain fabrication at Works Area WA4
-
Maintenance of Temporary Marine Access at Works Area WA2
-
All monitoring
parameters;
-
Monitoring
schedules for the reporting month and forthcoming month;
-
Action and
Limit levels for all environmental parameters;
-
Event / Action
Plan;
-
Environmental
mitigation measures, as recommended in the Project EIA reports; and
-
Environmental
requirement in contract documents.
Table 2.1 Air
Quality Monitoring Equipment
Equipment |
Brand and Model |
Portable
direct reading dust meter (1-hour TSP) |
Sibata Digital Dust Monitor (Model No. LD-3 and LD-3B) |
High
Volume Sampler |
Tisch Environmental Mass Flow Controlled
Total Suspended Particulate (TSP) High Volume Air Sampler (Model
No. TE-5170) |
Table 2.2 Locations
of Impact Air Quality Monitoring Stations
Monitoring Station |
Location |
Description |
AMS2 |
Tung Chung Development Pier |
Rooftop of the premise |
AMS3A |
Site Boundary of Site Office Area at Works Area WA2 |
On ground at the area boundary |
AMS6* |
Dragonair/CNAC (Group) Building |
On ground at boundary of the premise |
AMS7 |
Hong Kong SkyCity Marriott Hotel |
On ground at boundary of the premise |
#Remarks: Reference is made to EPD conditional
approval of the omission of air monitoring station (AMS 6) for the project. The
omission will be effective on 19 November 2012.
Table 2.3 Air
Quality Monitoring Parameters, Frequency and Duration
Parameter |
Frequency and Duration |
1-hour
TSP |
Three times every 6
days while the highest dust impact was expected |
24-hour
TSP |
Once every 6 days |
(a)
The HVS was installed in the
vicinity of the air sensitive receivers.
The following criteria were considered in the installation of the HVS.
(i)
A horizontal platform with
appropriate support to secure the sampler against gusty wind was provided.
(ii)
No two samplers should be placed
less than 2 meters apart.
(iii)
The distance between the HVS and
any obstacles, such as buildings, was at least twice the height that the
obstacle protrudes above the HVS.
(iv)
A minimum of 2 meters separation
from walls, parapets and penthouse for rooftop sampler.
(v)
A minimum of 2 meters separation
from any supporting structure, measured horizontally is required.
(vi)
No furnace or incinerator flues
nearby.
(vii)
Airflow around the sampler was
unrestricted.
(viii)
Permission was obtained to set up
the samplers and access to the monitoring stations.
(ix)
A secured supply of electricity
was obtained to operate the samplers.
(x)
The sampler was located more than
20 meters from any dripline.
(xi)
Any wire fence and gate, required
to protect the sampler, did not obstruct the monitoring process.
(xii)
Flow control accuracy was kept
within ¡Ó2.5% deviation over 24-hour sampling period.
(b)
Preparation of Filter Papers
(i)
Glass fibre
filters, G810 were labelled and sufficient filters
that were clean and without pinholes were selected.
(ii)
All filters were equilibrated in
the conditioning environment for 24 hours before weighing. The conditioning
environment temperature was around
(iii)
All filter papers were prepared
and analysed by ALS Technichem
(HK) Pty Ltd., which is a HOKLAS accredited laboratory and has comprehensive
quality assurance and quality control programmes.
(c)
Field Monitoring
(i)
The power supply was checked to
ensure the HVS works properly.
(ii)
The filter holder and the area
surrounding the filter were cleaned.
(iii)
The filter holder was removed by
loosening the four bolts and a new filter, with stamped number upward, on a
supporting screen was aligned carefully.
(iv)
The filter was properly aligned
on the screen so that the gasket formed an airtight seal on the outer edges of
the filter.
(v)
The swing bolts were fastened to
hold the filter holder down to the frame.
The pressure applied was sufficient to avoid air leakage at the edges.
(vi)
Then the shelter lid was closed
and was secured with the aluminum strip.
(vii)
The HVS was warmed-up for about 5
minutes to establish run-temperature conditions.
(viii)
A new flow rate record sheet was
set into the flow recorder.
(ix)
On site temperature and
atmospheric pressure readings were taken and the flow rate of the HVS was
checked and adjusted at around 1.1 m3/min,
and complied with the range specified in the updated EM&A Manual (i.e.
0.6-1.7 m3/min).
(x)
The programmable digital timer
was set for a sampling period of 24 hrs, and the starting time, weather
condition and the filter number were recorded.
(xi)
The initial elapsed time was
recorded.
(xii)
At the end of sampling, on site
temperature and atmospheric pressure readings were taken and the final flow
rate of the HVS was checked and recorded.
(xiii)
The final elapsed time was
recorded.
(xiv)
The sampled filter was removed carefully
and folded in half length so that only surfaces with collected particulate
matter were in contact.
(xv)
It was then placed in a clean
plastic envelope and sealed.
(xvi)
All monitoring information was
recorded on a standard data sheet.
(xvii)
Filters were then sent to ALS Technichem (HK) Pty Ltd. for analysis.
(d)
Maintenance and Calibration
(i)
The HVS and its accessories were
maintained in good working condition, such as replacing motor brushes routinely
and checking electrical wiring to ensure a continuous power supply.
(ii)
5-point calibration of the HVS
was conducted using TE
(iii)
Calibration certificate of the
HVSs are provided in Appendix E.
(a)
Measuring Procedures
The
measuring procedures of the 1-hour dust meter were in accordance with the
Manufacturer¡¦s Instruction Manual as follows:-
(i)
Turn the power on.
(ii)
Close the air collecting opening
cover.
(iii)
Push the ¡§TIME SETTING¡¨ switch to
[BG].
(iv)
Push ¡§START/STOP¡¨ switch to
perform background measurement for 6 seconds.
(v)
Turn the knob at SENSI ADJ
position to insert the light scattering plate.
(vi)
Leave the equipment for 1 minute
upon ¡§SPAN CHECK¡¨ is indicated in the display.
(vii)
Push ¡§START/STOP¡¨ switch to
perform automatic sensitivity adjustment. This measurement takes 1 minute.
(viii)
Pull out the knob and return it
to MEASURE position.
(ix)
Push the ¡§TIME SETTING¡¨ switch
the time set in the display to 3 hours.
(x)
Lower down the air collection
opening cover.
(xi)
Push ¡§START/STOP¡¨ switch to start
measurement.
(b)
Maintenance and Calibration
(i)
The 1-hour TSP meter was
calibrated at 1-year intervals against a continuous particulate TEOM Monitor,
Series 1400ab. Calibration certificates of the Laser Dust Monitors are provided
in Appendix E.
(ii)
1-hour validation checking of the
TSP meter against HVS is carried out on half-year basis at the air quality monitoring locations.
Table 2.4 Summary
of 1-hour TSP Monitoring Results in the Reporting Period
|
Average (mg/m3) |
Range (mg/m3) |
Action
Level (mg/m3) |
Limit Level
(mg/m3) |
AMS2 |
84 |
79 ¡V 94 |
374 |
500 |
AMS3A |
85 |
79 ¡V 95 |
368 |
500 |
AMS7 |
83 |
78 ¡V 93 |
370 |
500 |
Table
2.5 Summary
of 24-hour TSP Monitoring Results in the Reporting Period
|
Average (mg/m3) |
Range (mg/m3) |
Action
Level (mg/m3) |
Limit Level
(mg/m3) |
AMS2 |
95 |
42 ¡V 140 |
176 |
260 |
AMS3A |
157 |
96¡V 198 |
167 |
260 |
AMS7 |
88 |
51 ¡V 127 |
183 |
260 |
2.7.3.1 According
to information provided by the Contractor, land-based construction activity
such as using canvas to cover sand material, sampling geotextile
material and stitching geotextile were being
undertaken at Works Area WA2 during the monitoring period.
2.7.3.2 Functional
checking on HVS at AMS3A was done. Air flow of the HVS was checked and the flow
was steady during the 24-hr TSP sampling at AMS3A. The filter paper was
re-weighted by the assigned HOKLAS laboratory and the result was reconfirmed.
2.7.3.3 Photo
records shows that vehicle would travel on exposed soil surfaces at those construction
sites of nearby private development project which are close to the monitoring
station AMS3A but beyond the site boundary of Works Area WA2. (Please also see
photo and layout map attached for reference of site conditions.)
2.7.3.4 As
refer to the wind data collected at wind station at Works Area WA2 during the
monitoring period on 15 and 16 Oct 13 (as attached) East South East winds was
prevailing during the monitoring period. Traffics at construction sites of nearby
private development project which are close to the monitoring station AMS3A but
beyond the site boundary of Works Area WA 2 may contribute to the measured dust
levels at the monitoring station AMS3A.
Conditions
of the construction sites near Works Area WA2:
View
A: (Canvas was used to cover sand material
stored at WA2):
View B: (Traffic on dusty surface observed
at nearby construction site which do not belongs to this Contract)
2.7.3.5 The
1-hr TSP values recorded at AMS3A on 15 Oct 13, which are within the monitoring
period of the 24-hr TSP, were 87mg/m3, 85mg/m3 and
87mg/m3 respectively.
All measured values are well below the Action and Limit Levels.
2.7.3.6 The
measured 24-hr TSP values recorded at AMS2 and AMS7 (which are closer to the
marine-based works areas) on the same monitoring date were 97mg/m3 and
92mg/m3
respectively, which are below the Action and Limit Levels.
2.7.3.7 The
following dust mitigation measures have been implemented at Works Area WA2:
1. Canvas/tarpaulin sheet was used
to cover sand material stored at WA2 (please refer to photo record ¡V View A
above)
2. Works Area WA2¡¦s surface was
hard-paved, compacted or hydro-seeded
3. Vehicle washing facility was
provided at vehicle exit points,
2.7.3.8 The
dust exceedance was therefore considered not to be
due to the Project works.
2.7.3.9 The
Contractor was recommended to continue implementing existing dust mitigation
measures.
2.7.5.1
According to information provided by the Contractor, land-based
construction activity such as stitching geotextile, transloading stitching geotextile
and tidy up the stitching area were being undertaken at Works Area WA2 during the
monitoring period.
2.7.5.2
Functional checking on HVS at AMS3A was done. Air flow of the HVS was
checked and the flow was steady during the 24-hr TSP sampling at AMS3A. The
filter paper was re-weighted by the assigned HOKLAS laboratory and the result
was reconfirmed.
2.7.5.3
Photo records shows that vehicle would travel on exposed soil surfaces
at those construction sites of nearby private development project which are
close to the monitoring station AMS3A but beyond the site boundary of Works
Area WA2. (Please also see photo and layout map attached for reference of site
conditions (View A.)
Photo
record:
View
A (Traffic on dusty surface observed at nearby
construction site which do not belongs to this Contract)
View
B (Hard paved surface observed at Works Area WA2)
2.7.5.4
As refer to the wind data collected at wind station at Works Area WA2
during the monitoring period on 18 and 19 Oct 13 (as attached) south-southeast winds
was prevailing during the monitoring period. Traffics at construction sites of nearby
private development project which are close to the monitoring station AMS3A but
beyond the site boundary of Works Area WA 2 may contribute to the measured dust
levels at the monitoring station AMS3A.
2.7.5.5
The 1-hr TSP values recorded at AMS3A on 19 Oct 13, which are within the
monitoring period of the 24-hr TSP, were 85mg/m3, 85mg/m3 and 84mg/m3 respectively. All measured
values are well below the Action and Limit Levels.
2.7.5.6
The measured 24-hr TSP values recorded at AMS2 and AMS7 (which are
closer to the marine-based works areas) on the same monitoring date were 116mg/m3 and 101mg/m3 respectively, which are below
the Action and Limit Levels.
2.7.5.7
The following dust mitigation measures have been implemented at Works
Area WA2:
1. Works Area WA2¡¦s surface was
hard-paved, compacted or hydro-seeded (Please refer to attached layout map and photo
record (View B))
2. Vehicle washing facility was
provided at vehicle exit points,
3. Measures for preventing fugitive
dust emission are provided, e.g. canvas/tarpaulin covers.
2.7.5.8
The dust exceedance was therefore considered
not to be due to the Project works.
2.7.5.9
The Contractor was recommended to continue implementing existing dust
mitigation measures.
Table 3.1 Noise
Monitoring Equipment
Equipment |
Brand and Model |
Integrated Sound Level Meter |
Rion NL-31 & B&K2238 |
Acoustic Calibrator |
Rion NC-73 |
Table
3.2 Locations
of Impact Noise Monitoring Stations
Monitoring Station |
Location |
Description |
NMS2 |
Seaview Crescent Tower 1 |
Free-field
on the rooftop of the premise |
NMS3A |
Site Boundary of Site Office Area at
Works Area WA2 |
Free-field on
ground at the area boundary. |
Table 3.3 Noise
Monitoring Parameters, Frequency and Duration
Parameter |
Frequency and Duration |
30-mins measurement at each monitoring station between
0700 and 1900 on normal weekdays (Monday to Saturday). Leq,
L10 and L90 would be recorded. |
At least once per week |
(a)
The sound level meter was set on
a tripod at a height of
(b)
All
measurement at NMS3A were free
field measurements in the reporting month at NMS3A. A correction of +3 dB(A) shall be made to the
free field measurements.
(c)
The battery condition was checked
to ensure the correct functioning of the meter.
(d)
Parameters such as frequency
weighting, the time weighting and the measurement time were set as follows:-
(i)
frequency weighting: A
(ii)
time weighting: Fast
(iii)
time measurement: Leq(30-minutes)
during non-restricted hours i.e. 07:00 ¡V 1900 on normal weekdays.
(e)
Prior to and after each noise
measurement, the meter was calibrated using the acoustic calibrator for 94dB(A) at 1000 Hz.
If the difference in the calibration level before and after measurement
was more than 1 dB(A), the measurement would be
considered invalid and repeat of noise measurement would be required after
re-calibration or repair of the equipment.
(f)
During the monitoring period, the
Leq, L10 and L90
were recorded. In addition, site
conditions and noise sources were recorded on a standard record sheet.
(g)
Noise measurement was paused
during periods of high intrusive noise (e.g. dog barking, helicopter noise) if
possible. Observations were recorded when intrusive noise was unavoidable.
(h)
Noise monitoring was cancelled in
the presence of fog, rain, wind with a steady speed exceeding
(a)
The microphone head of the sound
level meter was cleaned with soft cloth at regular intervals.
(b)
The meter and calibrator were
sent to the supplier or HOKLAS laboratory to check and calibrate at yearly
intervals.
(c)
Calibration certificates of the
sound level meters and acoustic calibrators are provided in Appendix E.
Table
3.4 Summary
of Construction Noise Monitoring Results in the Reporting Period
|
Average,
dB(A), Leq (30 mins) |
Range,
dB(A), Leq
(30 mins) |
Limit Level,
dB(A), Leq
(30 mins) |
NMS2 |
66 |
65 ¡V 67* |
75 |
NMS3A |
65 |
64 ¡V 66* |
70^ |
*+3dB(A) Façade correction included
^ Daytime noise Limit Level of 70 dB(A) applies to education institutions, while
65dB(A) applies during school examination period.
Table 4.1 Water
Quality Monitoring Equipment
Equipment |
Brand and Model |
Dissolved Oxygen (DO) and Temperature Meter, Salinity Meter and Turbidimeter |
YSI Model 6820 |
pH Meter |
YSI Model 6820 or Thermo Orion 230A+ |
Positioning Equipment |
JRC DGPS 224 Model JLR-4341 with J-NAV 500 Model NWZ4551 |
Water Depth Detector |
Eagle Cuda-168 |
Water Sampler |
Kahlsio Water Sampler (Vertical) 2.2 L with messenger |
Table
4.2 Impact
Water Quality Monitoring Parameters and Frequency
Monitoring
Stations |
Parameter,
unit |
Frequency |
No.
of depth |
Impact
Stations: IS5, IS(Mf)6, IS7, IS8,
IS(Mf)9, IS10, IS(Mf)11, IS(Mf)16, IS17 Control/Far
Field Stations: CS(Mf)3, CS(Mf)5, CS4, CS6,
CSA Sensitive
Receiver Stations: SR3-SR7, SR10A&SR10B |
¡P
Depth, m ¡P
Temperature, oC ¡P
Salinity, ppt ¡P
Dissolved Oxygen (DO), mg/L ¡P
DO Saturation, % ¡P
Turbidity, NTU ¡P
pH ¡P
Suspended Solids (SS), mg/L |
Three
times per week during mid-ebb and mid-flood tides (within ¡Ó 1.75 hour of the
predicted time) |
3 (1 m
below water surface, mid-depth and 1 m above sea bed, except where the water
depth is less than 6 m, in which case the mid-depth station may be
omitted. Should the water depth be less than 3 m, only the mid-depth
station will be monitored). |
Table 4.3 Impact
Water Quality Monitoring Stations
Station |
Description |
East |
North |
IS5 |
Impact Station (Close to HKBCF
construction site) |
811579 |
817106 |
IS(Mf)6 |
Impact Station (Close to HKBCF
construction site) |
812101 |
817873 |
IS7 |
Impact Station (Close to HKBCF
construction site) |
812244 |
818777 |
IS8 |
Impact Station (Close to HKBCF
construction site) |
814251 |
818412 |
IS(Mf)9 |
Impact Station (Close to HKBCF
construction site) |
813273 |
818850 |
IS10 |
Impact Station (Close to HKBCF
construction site) |
812577 |
820670 |
Impact Station (Close to
HKBCF construction site) |
813562 |
820716 |
|
Impact Station (Close to HKBCF
construction site) |
814328 |
819497 |
|
IS17 |
Impact Station (Close to HKBCF
construction site) |
814539 |
820391 |
SR3 |
Sensitive receivers (San Tau
SSSI) |
810525 |
816456 |
SR4(N) |
Sensitive receivers (Tai Ho) |
814705 |
817859 |
SR5 |
Sensitive receivers
(Artificial Reef in NE Airport) |
811489 |
820455 |
SR6 |
Sensitive receivers (Sha Chau and Lung Kwu Chau
Marine Park) |
805837 |
821818 |
SR7 |
Sensitive receivers (Tai Mo Do) |
814293 |
821431 |
SR10A |
Sensitive receivers (Ma Wan
FCZ)1 |
823741 |
823495 |
SR10B(N) |
Sensitive receivers (Ma Wan
FCZ)2 |
823683 |
823187 |
Control Station |
809989 |
821117 |
|
Control Station |
817990 |
821129 |
|
CS4 |
Control Station |
810025 |
824004 |
CS6 |
Control Station |
817028 |
823992 |
CSA |
Control Station |
818103 |
823064 |
(a)
The in-situ water quality
parameters, viz. dissolved oxygen, temperature, salinity, turbidity and pH,
were measured by multi-parameter meters (i.e. Model YSI 6820 CE-C-M-Y) and pH
meter (i.e. Thermo Orion 230A+) respectively.
(a)
Digital Differential Global Positioning Systems (DGPS) were used to ensure that the correct location was selected prior to
sample collection.
(b)
Portable, battery-operated echo
sounders were used for the determination of water depth at each designated
monitoring station.
(c)
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, in which case the mid-depth
station was omitted. Should the water depth be less than 3 m, only the
mid-depth station was monitored.
(d)
At each measurement/sampling
depth, two consecutive in-situ monitoring (DO concentration and saturation,
temperature, turbidity, pH, salinity) and water sample for SS. 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.
(e)
Duplicate samples from each
independent sampling event were collected for SS measurement. 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. Sample
bottles were pre-rinsed with the same water samples. The sample bottles were
then be packed in cool-boxes (cooled at 4oC without being frozen),
and delivered to ALS Technichem (HK) Pty Ltd. for the
analysis of suspended solids 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 quality
assurance and quality control programmes. For QA/QC
procedures, one duplicate samples of every batch of 20 samples was
analyzed.
(f)
The analysis method and reporting
and detection limit for SS is shown in Table 4.4.
Table
4.4 Laboratory
Analysis for Suspended Solids
Parameters |
Instrumentation |
Analytical Method |
Reporting Limit |
Detection Limit |
Suspended Solid (SS) |
Weighting |
APHA 2540-D |
0.5mg/L |
0.5mg/L |
(g)
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.
(a)
All in situ monitoring
instruments would be calibrated and calibrated by ALS Technichem
(HK) Pty Ltd. before use and at 3-monthly intervals throughout all stages of
the water quality monitoring programme. Calibration
details are provided in Appendix E.
(b)
The dissolved oxygen probe of YSI
6820 was calibrated by wet bulb method. Before the calibration routine, the
sensor for dissolved oxygen was thermally equilibrated in water-saturated air.
Calibration cup is served as a calibration chamber and it was loosened from
airtight condition before it is used for the calibration. Calibration at ALS Technichem (HK) Pty Ltd. was carried out once every three
months in a water sample with a known concentration of dissolved oxygen. The
sensor was immersed in the water and after thermal equilibration, the known
mg/L value was keyed in and the calibration was carried out automatically.
(c)
The turbidity probe of YSI 6820
is calibrated two times a month. A zero check in distilled water was performed
with the turbidity probe of YSI 6820 once per monitoring day. The probe will be
calibrated with a solution of known NTU at ALS Technichem
(HK) Pty Ltd. once every three months.
Table 4.5 Summary
of Water Quality Exceedances
Exceedance Level |
DO (S&M) |
DO (Bottom) |
Turbidity |
SS |
Total |
||||||
Ebb |
Flood |
Ebb |
Flood |
Ebb |
Flood |
Ebb |
Flood |
Ebb |
Flood |
||
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS(Mf)6 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS7 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
(1) 18
Oct 13 |
0 |
1 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS8 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS(Mf)9 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
(1) 04
Oct 13 |
0 |
1 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS10 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
(1) 07
Oct 13 |
0 |
1 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
(1) 25
Oct 13 |
0 |
1 |
|
IS(Mf)11 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS(Mf)16 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
(1) 04 Oct 13 |
(1) 16 Oct 13 |
1 |
1 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS17 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
SR3 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
SR4(N) |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
SR5 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
(1) 07
Oct 13 |
0 |
1 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
(1) 25
Oct 13 |
0 |
1 |
|
SR6 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
SR7 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
SR10A |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
SR10B (N) |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
(1) 21
Oct 13 |
0 |
1 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Total |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
7 |
|
|
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
2 |
Note: S:
Surface; and
M:
Mid-depth.
Photo record
shows that no defect was observed on the perimeter silt curtain nearby IS(Mf)9.
Photo record
shows that no defect was observed on the perimeter silt curtain nearby IS(Mf)16.
Photo record
shows that localised silt curtain was implemented
during stone column installation.
Photo
record of the sea condition taken on 16 Oct 13
Table 5.1 Dolphin
Monitoring Equipment
Equipment |
Model |
Commercially licensed motor
vessel |
15m in length with a 4.5m viewing platform |
Global Positioning System (GPS) x2 |
Integrated into T7000 Garmin GPS Map 78C |
Computers (T7000
Tablet, Intel Atom) |
Windows 7/MSO 13 Logger |
Camera |
Nikon D90 300m 2.8D fixed focus Nikon D90 20-400m zoom lens |
Laser Rangefinder |
Infinitor LRF1000/ Kings 950 |
Marine Binocular x3 |
Nexus 7 x 50 marine binocular with
compass and reticules Fujinon 7 x 50 marine
binocular with compass and reticules |
Table 5.2 Impact
Dolphin Monitoring Line Transect Co-ordinates (Provided by AFCD)
|
HK Grid System |
Long Lat in WGS84 |
||
ID |
X |
Y |
Long |
Lat |
1 |
804671 |
814577 |
113.870308 |
22.269741 |
1 |
804671 |
831404 |
113.869975 |
22.421696 |
2 |
805475 |
815457 |
113.878087 |
22.277704 |
2 |
805477 |
826654 |
113.877896 |
22.378814 |
3 |
806464 |
819435 |
113.887615 |
22.313643 |
3 |
806464 |
822911 |
113.887550 |
22.345030 |
4 |
807518 |
819771 |
113.897833 |
22.316697 |
4 |
807518 |
829230 |
113.897663 |
22.402113 |
5 |
808504 |
820220 |
113.907397 |
22.320761 |
5 |
808504 |
828602 |
113.907252 |
22.396462 |
6 |
809490 |
820466 |
113.916965 |
22.323003 |
6 |
809490 |
825352 |
113.916884 |
22.367128 |
7 |
810499 |
820690 |
113.926752 |
22.325043 |
7 |
810499 |
824613 |
113.926688 |
22.360464 |
8 |
811508 |
820847 |
113.936539 |
22.326475 |
8 |
811508 |
824254 |
113.936486 |
22.357241 |
9 |
812516 |
820892 |
113.946329 |
22.326894 |
9 |
812516 |
824254 |
113.946279 |
22.357255 |
10* |
813525 |
818270 |
113.956156 |
22.303225 |
10* |
813525 |
824657 |
113.956065 |
22.360912 |
11 |
814556 |
818449 |
113.966160 |
22.304858 |
11 |
814556 |
820992 |
113.966125 |
22.327820 |
12 |
815542 |
818807 |
113.975726 |
22.308109 |
12 |
815542 |
824882 |
113.975647 |
22.362962 |
13 |
816506 |
819480 |
113.985072 |
22.314192 |
13 |
816506 |
824859 |
113.985005 |
22.362771 |
14 |
817537 |
820220 |
113.995070 |
22.320883 |
14 |
817537 |
824613 |
113.995018 |
22.360556 |
15 |
818568 |
820735 |
114.005071 |
22.325550 |
15 |
818568 |
824433 |
114.005030 |
22.358947 |
16 |
819532 |
821420 |
114.014420 |
22.331747 |
16 |
819532 |
824209 |
114.014390 |
22.356933 |
17 |
820451 |
822125 |
114.023333 |
22.338117 |
17 |
820451 |
823671 |
114.023317 |
22.352084 |
18 |
821504 |
822371 |
114.033556 |
22.340353 |
18 |
821504 |
823761 |
114.033544 |
22.352903 |
19 |
822513 |
823268 |
114.043340 |
22.348458 |
19 |
822513 |
824321 |
114.043331 |
22.357971 |
20 |
823477 |
823402 |
114.052695 |
22.349680 |
20 |
823477 |
824613 |
114.052686 |
22.360610 |
21 |
805476 |
827081 |
113.877878 |
22.382668 |
21 |
805476 |
830562 |
113.877811 |
22.414103 |
22 |
806464 |
824033 |
113.887520 |
22.355164 |
22 |
806464 |
829598 |
113.887416 |
22.405423 |
23 |
814559 |
821739 |
113.966142 |
22.334574 |
23 |
814559 |
824768 |
113.966101 |
22.361920 |
Table 5.3 Impact Dolphin Monitoring
Survey Effort Summary, Effort by Area and Beaufort Sea State
Date |
Area |
Beaufort |
Effort (km) |
Total Distance
Travelled (km) |
|
1 |
15/10/2013 |
NWL |
1 |
35.8 |
59.7 |
15/10/2013 |
NWL |
2 |
23.9 |
||
17/10/2013 |
NWL |
1 |
1.1 |
52.1 |
|
17/10/2013 |
NWL |
2 |
7.4 |
||
17/10/2013 |
NWL |
3 |
6 |
||
17/10/2013 |
NEL |
1 |
9.2 |
||
17/10/2013 |
NEL |
2 |
20.5 |
||
17/10/2013 |
NEL |
3 |
7.9 |
||
2 |
24/10/2013 |
NWL |
1 |
12.2 |
58.7 |
24/10/2013 |
NWL |
2 |
32.7 |
||
24/10/2013 |
NWL |
3 |
13.7 |
||
24/10/2013 |
NWL |
4 |
0.1 |
||
28/10/2013 |
NWL |
1 |
4.9 |
51.8 |
|
28/10/2013 |
NWL |
2 |
10.2 |
||
28/10/2013 |
NEL |
1 |
14.6 |
||
28/10/2013 |
NEL |
2 |
10.7 |
||
28/10/2013 |
NEL |
3 |
11.4 |
||
TOTAL in October 2013 |
222.3 |
*Remark:
Surveys conduct under Beaufort Sea State 3 or below are considered as under favourable condition.
Table 5.4 Impact Dolphin Monitoring
Survey Details in October
2013
Date |
Location |
No. Sightings ¡§on effort¡¨ |
No. Sightings ¡§opportunistic¡¨ |
15/10/13 |
NWL |
6 |
3 |
NEL |
0 |
0 |
|
17/10/13 |
NWL |
0 |
0 |
NEL |
0 |
0 |
|
24/10/13 |
NWL |
5 |
2 |
NEL |
0 |
0 |
|
28/10/13 |
NWL |
0 |
0 |
NEL |
0 |
0 |
|
TOTAL in October 2013 |
11 |
5 |
Table 5.5 The Encounter Rate of Number of Dolphin Sightings &
Total Number of Dolphins per Area^
Encounter Rate of Number
of Dolphin Sightings (STG)* |
||||||
Date |
NEL Track |
NWL Track |
NEL Sightings |
NWL Sightings |
NEL Encounter Rate |
NWL Encounter Rate |
15 & 17/10/2013 |
37.6 km |
74.2 km |
0 |
6 |
0.0 |
8.1 |
24 & 28/10/2013 |
36.7 km |
73.7 km |
0 |
5 |
0.0 |
6.8 |
Encounter Rate
of Total Number of Dolphins (ANI)** |
||||||
Date |
NEL Track |
NWL Track |
NEL Dolphins |
NWL Dolphins |
NEL Encounter Rate |
NWL Encounter Rate |
15 & 17/10/2013 |
37.6 km |
74.2 km |
0 |
21 |
0.0 |
28.3 |
24 & 28/10/2013 |
36.7 km |
73.7 km |
0 |
23 |
0.0 |
31.2 |
*
Encounter Rate of Number of Dolphin Sightings (STG) presents encounter rates in terms of groups per 100km.
** Encounter Rate of
Total Number of Dolphins (ANI) presents encounter rates
in terms of individuals per 100km. And the encounter rate is not corrected for
individuals, calculation may represent double counting.
^The table is made only for reference to the
quarterly STG & ANI, which were adopted for the Event & Action Plan.
Marine construction activities which are not
part of the HKBCF Contract continue in NWL in particular in the
vicinity of transect line 1 and 2.
Previously reported dredging activities continued at the Brothers
Islands, in the vicinity of transect lines 11 and 12.
Site Inspection
Air Quality
Noise
Water Quality
Chemical and Waste
Management
Landscape and Visual
Impact
Others
Table 6.1 Summary of Environmental Licensing and Permit Status
Statutory Reference |
License/ Permit |
License or Permit No. |
Valid Period |
License/ Permit Holder |
Remarks |
|
From |
To |
|||||
EIAO |
Environmental
Permit |
EP-353/2009/G |
06/08/2012 |
N/A |
HyD |
Hong
Kong ¡V Zhuhai ¡V Macao Bridge Hong Kong Boundary
Crossing Facilities |
EP-354/2009/A |
08/12/2010 |
N/A |
Tuen Mun ¡V Chek
Lap Kok Link (TMCLKL Southern Landfall Reclamation only) |
|||
APCO |
NA
notification |
-- |
30/12/2011 |
-- |
CHEC |
Works
Area WA2 and WA3 |
APCO |
NA
notification |
-- |
17/01/2012 |
-- |
CHEC |
Works
Area WA4 |
WDO |
Chemical
Waste Producer Registration |
5213-951-C1186-21 |
30/3/2012 |
N/A |
CHEC |
Chemical
waste produced in Contract HY/2010/02 |
WDO |
Chemical
Waste Producer Registration |
5213-974-C3750-01 |
31/10/2012 |
-- |
CHEC |
Registration
as Chemical Waste Producer at To Kau Wan(WA4) |
WDO |
Chemical
Waste Producer Registration |
5213-839-C3750-02 |
13/09/2012 |
-- |
CHEC |
Registration
as Chemical Waste Producer at TKO 137(FB) |
WDO |
Billing Account for Disposal of Construction
Waste |
7014181 |
05/12/2011 |
N/A |
CHEC |
Waste
disposal in Contract HY/2010/02 |
NCO |
Construction
Noise Permit |
GW-RE0634-13 |
24/06/2013 |
31/12/2013 |
CHEC |
Works Area WA4 in Contract
HY/2010/02 |
NCO |
Construction
Noise Permit |
GW-RW0424-13 |
28/06/2013 |
27/12/2013 |
CHEC |
Section of TKO Fill Bank under Contract
HY/2010/02 |
Marine-based Works
-
Marine-base
-
Cellular structure installation
-
Connecting arc cell installation
-
Laying geo-textile
-
Sand blanket laying
-
Sand filling
-
Maintenance of silt curtain & silt screen at sea water
intake of HKIA
-
Stone column installation
-
Band drain installation
-
Backfill cellular structure
-
Geotechnical Instrumentation works
-
Rubble mound seawall construction
-
Construction of temporary seawall
-
Ground investigation
-
Surcharge laying
-
Construction of temporary assess from Portion D to Portion A
-
Precast Yard Setup
Land-based Works
-
Maintenance works of
Site Office at Works Area WA2
-
Maintenance works of Public Works Regional Laboratory
at Works Area WA3
-
Geo-textile fabrication at Works Area WA2
-
Silt curtain fabrication at Works Area WA4
-
Maintenance of Temporary Marine Access at Works Area WA2
-
Site runoff should be properly collected
and treated prior to discharge;
-
Minimize loss of sediment from filling
works;
-
Regular review and maintenance of silt
curtain systems, drainage systems and desilting
facilities;
-
Exposed surfaces/soil stockpiles should
be properly treated to avoid generation of silty
surface run-off during rainstorm;
-
Regular review and maintenance of wheel
washing facilities provided at all site entrances/exits;
-
Conduct regular inspection of various
working machineries and vessels within works areas to avoid any dark smoke
emission;
-
Suppress dust generated from work
processes with use of bagged cements, earth movements, excavation activities,
exposed surfaces/soil stockpiles and
haul road traffic;
-
Quieter powered mechanical equipment
should be used;
-
Provision of proper and effective noise
control measures for operating equipment and machinery on-site, such as
erection of movable noise barriers or enclosure for noisy plants;
-
Closely check and replace the sound
insulation materials regularly;
-
Better scheduling of construction works
to minimize noise nuisance;
-
Properly store and label oil drums and
chemical containers placed on site;
-
Proper chemicals, chemical wastes and
wastes management;
-
Maintenance works should be carried out
within roofed, paved and confined areas;
-
Collection and segregation of
construction waste and general refuse on land and in the sea should be carried
out properly and regularly; and
- Proper
protection and regular inspection of existing trees, transplanted/retained
trees.
Air Quality
Impact
l All working plants and vessels on site should be regularly inspected and
properly maintained to avoid dark smoke emission.
l All vehicles should
be washed to remove any dusty materials before leaving the site.
l Haul roads should be
sufficiently dampened to minimize fugitive dust generation.
l Wheel washing
facilities should be properly maintained and reviewed to ensure properly
functioning.
l Temporary exposed
slopes and open stockpiles should be properly covered.
l Enclosure should be
erected for cement debagging, batching and mixing operations.
l Water spraying should be provided to suppress fugitive dust for any dusty
construction activity.
Construction
Noise Impact
l Quieter powered mechanical equipment should be used as far as possible.
l Noisy operations should be oriented to a direction away from sensitive
receivers as far as possible.
l Proper and effective noise control measures for operating equipment and
machinery on-site should be provided, such as erection of movable noise
barriers,
enclosure for noisy plants or enhancement
works to provide sufficient acoustic decoupling measure(s). Closely check and replace the sound insulation materials regularly
l Vessels and equipment operating should be checked regularly and properly
maintained.
l Noise Emission Label (NEL) shall be affixed to the air compressor and
hand-held breaker operating within works area.
l Acoustic decoupling measures should be properly implemented for all existing and incoming construction vessels
with continuous and regularly checking to ensure effective implementation of acoustic decoupling measures.
Water Quality
Impact
l Regular review and maintenance of silt curtain systems, drainage systems
and desilting facilities in order to make sure they are functioning
effectively.
l Construction of seawall should be completed as early as possible.
l Regular inspect and review the loading process from barges to avoid
splashing of material.
l Silt, debris and leaves accumulated at public drains, wheel washing bays
and perimeter u-channels and desilting facilities should be cleaned up
regularly.
l Silty effluent should be treated/ desilted before discharged. Untreated
effluent should be prevented from entering public drain channel.
l Proper drainage channels/bunds should be provided at the site boundaries
to collect/intercept the surface run-off from works areas.
l Exposed slopes and stockpiles should be covered up properly during
rainstorm.
Chemical and
Waste Management
l All types of wastes, both on land and floating in the sea, should be
collected and sorted properly and disposed of timely and properly. They should
be properly stored in designated areas within works areas temporarily.
l All chemical containers, batteries and oil drums should be properly
stored and labelled.
l All plants and vehicles on site should be properly maintained to prevent
oil leakage. Proper measures,
like drip trays and/or bundings, should be provided for retaining leaked
oil/chemical from plants.
l All kinds of maintenance works should be carried out within roofed,
paved and confined areas.
l All drain holes of the drip trays utilized within works areas should be
properly plugged to avoid any oil and chemical waste leakage.
l Oil stains on soil surface, accumulated oil mixture and empty chemical
containers should be cleared and disposed of as chemical waste.
l Regular review should be conducted for
working barges and patrol boats to ensure sufficient measures and spill control
kits were provided on working barges and patrol boats to avoid any spreading of
leaked oil/chemicals.
Landscape and
Visual Impact
l All existing, retained/transplanted trees at the works areas should be
properly fenced off and regularly inspected.