|
Client |
Civil Engineering and Development Department |
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|
Project |
Supplementary Agreement No. 3 to Agreement No. CE
15/94 Design and Construction for the Minimum Option |
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|
Report
No. |
3128-REP-197-00 |
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|
Date of Issue |
14 February 2004 |
File
Ref. L:\S-proj\CR3\CR3.NEW\3128\Reports\ 0197.doc |
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|
Report Title |
Central
Reclamation, Phase III Environmental
Monitoring & Audit Monthly
Report No. 18 - January 2005 |
||||
|
|
Name |
Sign |
Date |
||
|
Prepared
by : |
Albert
Chan, ACL - Environmental Consultant |
|
14
Feb. 2005 |
||
|
Reviewed by : |
Susana
Bezy, ACL – ET Leader |
|
14 Feb. 2005 |
||
|
Authorised by : |
Jon
Varndell, ACL – Project Mgr |
|
14 Feb. 2005 |
||
|
|
|
|
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|
Distribution |
|
|
|||
|
Copy No |
Issue to |
Attention |
Corr. Ref. |
||
|
1 |
CEDD |
Mr
H H Yeung |
3128/M45/200/OC6892/al |
||
|
2,
3 |
EPD |
Mr
M W Ho |
3128/M45/200/OC6892/al |
||
|
4 |
EPD
(LCO) |
Mr
Samson Cheng |
3128/M45/200/OC6892/al |
||
|
5 |
Leighton-China
State-Van Oord JV |
Mr
Malcolm Plummer |
3128/M45/200/OC6892/al |
||
|
6 |
CRIII Sites/PRE |
Mr
Douglas Miller |
3128/M45/200/OC6892/al |
||
|
7 |
Independent
Checker (Environment) |
Mr
Bill Douglas |
3128/M45/200/OC6892/al |
||
|
8 |
Environmental
Team Leader |
Ms
Susana Bezy |
3128/M45/200/OC6892/al |
||
|
9 |
Office
Copy |
|
|
||
1. INTRODUCTION
1.1 Basic Project Information
2.1 Works Undertaken
2.2 Environmental Permits
2.3 Environmental
Document Submission
2.4 Environmental Meetings
2.5 Environmental Monitoring Locations
3.1 Summary of Impact EM&A Requirements
3.2 Environmental Quality Performance Limits
3.3 Event Action Plan
3.4 Implementation of Environmental Measures
4.1 Impact Monitoring
Schedule in January 2005
4.2 Monitoring Methodology
4.3 Monitoring Equipment
4.4 Impact Monitoring Results
5. Environmental
Complaint and Non-Compliance
5.1 Environmental Exceedances
5.2 Environmental
Complaint and Prosecution
5.3 Environmental
Enquiries
6.1 Key Works for the
Coming Month
6.2 Monitoring Schedules
for the Coming Months
6.3 Construction Programme
for the Next 3 Months
List of Annexes
Annex A Project Organisation / Contact Information
Annex B Contractor’s Work Programme
Annex C Location of Monitoring Stations & Outfalls
Annex D Environmental Quality Performance Limits for Air, Noise and Water Quality
Annex E Event and Action Plan for Air, Noise and Water Quality
Annex F Noise Monitoring Results
Annex G Graphical Representation of Noise Monitoring Results
Annex H Water Quality Monitoring Results
Annex I Graphical Representation of Water Quality Monitoring Results
Annex J Water Quality Exceedance Review
Annex K IEC Site Inspection Report
List of Tables
Table 2.1 - Summary of the Environmental License / Permit Status
Table 2.2 - Summary of the Contractor's Environmental Related Document
Submissions to the Engineer’s Representatives (ER)
Table 2.3 - Summary of Environmental Certification Sheet Submissions to
the Environmental Protection Department (EPD).....................................................................................................................................
Table 3.1 -
Summary of Impact EM&A Requirements
Table
4.1 - Water Quality Monitoring Programme (Seawater Intakes Stations)
Table
4.2 - Equipment for Air Quality Monitoring
Table
4.3 - Noise Monitoring Equipment
Table
4.4 - Equipment Used for Marine Water Quality Monitoring
Table
4.5 - Equipment Calibration Frequencies
Table
4.5 - Summary of Mid-Ebb Results for Marine-Based Stations
Table
4.6 - Summary of Mid-Flood Results for Marine-Based Stations
Table
4.7 - Summary of Mid-Ebb Results for Seawater Intake Stations
Table
4.8 - Summary of Mid-Flood Results for Seawater Intake Stations
Table 5.1 - Summary of Environmental Site Inspections
Table
6.1 - Water Quality Monitoring Programme
|
ACL |
Atkins China Limited |
|
CEDD |
Civil Engineering and Development Department |
|
CRIII |
Central Reclamation Phase III |
|
EIA |
Environmental Impact Assessment |
|
EIAO |
Environmental Impact Assessment Ordinance |
|
EM&A |
Environmental Monitoring and Audit |
|
EPD |
Environmental Protection Department |
|
ER |
Engineer’s Representatives |
|
ET |
Environmental Team |
|
IEC |
Independent Environmental Checker |
|
LCSD |
Leisure and Cultural Services Department |
|
LCSVO-JV |
Leighton China State Van Oord Joint Venture |
|
TDD |
Territory Development Department |
|
TSP |
Total Suspended Particulates |
|
WMP |
Waste Management Plan |
Executive
Summary
The Central Reclamation Phase III (CRIII)
Works, Contract No. HK 12/02, was awarded to Leighton China State Van Oord
Joint Venture (LCSVO-JV) by the Territory Development Department (now called
the Civil Engineering and Development Department (CEDD) after the merger of the
Civil Engineering Department and the Territory Development Department on 1 July
2004), Hong Kong Islands and Islands Development Office. The works under the Contract HK 12/02
commenced on 28 February 2003. Contract
HK 16/03 for the CRIII Hinterland Drainage Improvement Works was awarded to
Wang Kee Construction Co. Ltd. and works for this contract commenced on 17
December 2003.
Atkins China Limited (ACL) has been appointed by CEDD to implement the
Environmental Monitoring and Audit (EM&A) programme that was identified in
the EIA Report for the CRIII Project and is providing Environmental Team (ET)
services during the duration of the construction works.
This is the eighteenth Monthly
EM&A Report under the EIAO for the
works specified in Section 1.3 of the CRIII EIA Report. This report summarises the monitoring
results and audit findings of the EM&A programme during the reporting
period from 1 to 31 January 2005.
Environmental Monitoring and Audit Progress
The monthly EM&A programme was undertaken in accordance with the
EM&A Manual. A summary of the
monitoring activities performed in this reporting month is listed below:
·
Environmental site inspections were
undertaken on 6, 13, 20 and 27 January 2005.
·
Noise monitoring was
performed continuously for 24 hours.
·
Water quality monitoring was
undertaken on the following days:
-
3 January 2005
-
5 January 2005
-
7 January 2005
-
10 January 2005
-
12 January 2005
-
14 January 2005
-
17 January 2005
-
19 January 2005
-
21 January 2005
-
24 January 2005
-
26 January 2005
-
28 January 2005
-
31 January 2005
Exceedance of Action and Limit Levels
There was no environmental air quality monitoring required during the
reporting period.
Noise quality exceedances were recorded on 1, 3, 4, 5, 13 and 28 January
2005. However, investigations into
these exceedances found that they were not due to the project works. The noise levels were attributable to
passer-by activities at the drop-off area in front of City Hall. Further, there are no project works located
in the vicinity of City Hall. External
contractors however are still undertaking exterior renovation works at City
Hall and these works have a direct influence on noise monitoring.
One elevated SS level was recorded at station
M4 on 26 January 2005. The exceedance
was investigated and was found to be attributable to bermstone removal works in
IRAE. All parties were immediately
informed of the exceedance and the Contractor temporarily suspended the
bermstone removal works until an additional silt curtain surrounding the
affected seawater intake was installed.
Subsequent site inspections did not find any sediment plumes in the area
and no further water quality impacts from the bermstone removal works were
observed.
No DO exceedances were recorded during the
reporting period.
Complaint Log
No environmental complaints were received during the reporting period.
Notifications of Summons and Prosecutions
There were no notifications of summons or
prosecutions received with regard to the environment during this reporting
period.
Site Inspection and
Audit
Environmental site
inspections for the CRIII project works area were undertaken on 6, 13, 20 and 27 January 2005. A joint inspection was carried out with the
IEC on 20 January 2005.
Key Works for the Coming Month
Future key works are as follows:
·
Architectural works for Pier
No. 7;
·
Obstruction removal and
preparation work for pile cap construction at Pier No. 8;
·
Removal of piling
obstructions at Public Pier West and piling works;
·
In-situ work for the pumping
stations installed at IRAW;
·
Placing of armour rock for
the temporary seawall at IRAW;
·
Land piling works and
substructure construction for the Central Terminal Building (CTB);
·
Land piling work for the Man
Yiu Street Footbridge;
·
Seawall construction at IRAE
·
Rock filling and sand
filling works at IRAE;
·
In-situ work for the pumping
station and caissons installed at IRAE;
·
Detach buoyancy tanks from
installed caisson units at IRAE;
·
Temporary intake pipes
installation;
·
Cooling watermains work at
Lung Wui Road;
·
Remedial work for Culvert F;
·
Excavation to bored piling
at Eastern Seawall; and
·
Maintenance and necessary
repair works for seawater intake silt screens.
The Main Works Contract HK 12/02 for CRIII commenced on 28th February
2003. Leighton-China State-Van Oord Joint Venture (LCSVO-JV) was awarded the
Contract No. HK 12/02 for the construction of the CRIII Engineering Works. Contract HK 16/03 for the CRIII Hinterland
Drainage Improvement Works was awarded to Wang Kee Construction Co. Ltd. and
works for this contract commenced on 17 December 2003.
Atkins China Limited (ACL) has been commissioned by TDD (now called
CEDD) to undertake the environmental monitoring and audit work for the project
in accordance with the Environmental Permit (EP No. EP-122/2002) issued to TDD
on 7 March 2002. The CRIII Project
Organisation is shown in Annex A.
This is the eighteenth monthly
EM&A Report under the EIAO, which presents the results of EM&A
work conducted during the period from 1 to 31 January 2005, inclusive.
The works undertaken during the reporting
month include obstruction clearing for marine piles, piling works at Pier 8 and
concreting of piles and pile caps, placing of armour rock for the temporary
seawall at IRAW, sand and rock filling works at IRAE, vibro-compaction works at
IRAW, in-situ work for pumping stations, seawall block installations, bermstone
removal, surcharge material works, landside cooling watermains works,
substructure works for the Central Terminal Building (CTB), land piling for the
Man Yiu Street footbridge and CTB, temporary intake pipes installation and
maintenance and necessary repair work for seawater intake silt screens.
A summary of the status of all environmental
permits, license, and/or notification to EPD for this project during the
reporting period are presented in Table 2.1.
|
Item |
Item
Description |
Date of
Application |
Permit Status |
|
1 |
Application for Construction Noise Permit for Site at Lung Wui Road and
Junction of Performing Arts Avenue & Fenwick Pier Street (Ref.
H2189/U2c/11944/MP/DC/KTY/ ST/cm). |
31
January 2005 |
- |
|
2 |
Application for Renewal of Construction Noise Permit for Percussive
Piling Near Pier 7, Central (Ref. H2189/U2c/ 11819/MP/DS/ST/ec). |
25
January 2005 |
- |
|
3 |
Application for Construction Noise Permit for Caissons at IRAE (Ref.
H2189/U2c/11779/MP/EY/DS/ST/ec). |
22
January 2005 |
- |
|
4 |
Application for Renewal of Construction Noise Permit GW-RS0549-04 for
Night-time Works at Man Yiu Street (Ref. H2189/U2c/11763/MP/DC/ST/ec). |
21
January 2005 |
- |
|
5 |
Application for Construction Noise Permit for Cooling Water Pipeline
Connection Works (Queensway Government Offices, Pacific Place & Admiralty
Centre) (Ref. H2189/U2c/11695/MP/DC/KTY/ST/cm) |
18
January 2005 |
- |
|
6 |
Application for Renewal of Construction Noise Permit GW-RS0672-04 (Ref.
H2189/U2c/11696/MP/DC/CKA/ST/cm). |
18
January 2005 |
- |
|
7 |
Application for Permit to Dump Material (Category M&H Dredged
Sediment) at Sea Under the Dumping at Sea Ordinance (Ref.
H2189/U2c/11627/MP/ET/ST/ec). |
14
January 2005 |
- |
|
8 |
Application for a Permit to Dump Material (Uncontaminated Sediment) at
Sea Under the Dumping at Sea Ordinance (Ref. H2189/U2c/11628/MP/EY/ST/ec). |
14
January 2005 |
- |
|
9 |
Test Report for Treated Effluent for Wastewater Discharge Licence No.
EP880/W10/XX0192 (Ref. H2189/U2c/11599/ MP/DC/ST/ec). |
13
January 2005 |
- |
|
10 |
Application for Renewal of Construction Noise Permit GW-TS0317-04 (Ref.
H2189/U2c/11558/MP/EY/DS/ST/ec). |
11
January 2005 |
- |
|
11 |
Application for Licence under Water Pollution Control Ordinance (Ref.
H2189/U2c/11526/MP/EY/DS/JA/ST/ec). |
10
January 2005 |
- |
|
12 |
Daily and Monthly Sediment Dumping Report Submission (Ref. H2189/U2c/11479/MP/ET/GL/ec). |
7
January 2005 |
- |
|
13 |
Application for Construction Noise Permit for Eastern Bored Pile Wall
Concreting (Ref. H2189/U2c/11458/MP/ EY/DS/ST/ec). |
5
January 2005 |
- |
A summary of the status of the submissions provided
during the reporting month is presented in Table 2.2.
|
Item |
Document
Title |
Version |
Date of
Submission to ER |
|
1 |
New
Construction Noise Permits GW-RS0018-05 and GW-RS0031-05 (Ref.
H2189/C1/11925/MP/ST/atm) |
- |
29 January 2005 |
|
2 |
Advance
Notification of Night-time & Sunday Construction Work (PLA) (Ref.
H2189/C1/11660/MP/DC/ ST/atm). |
- |
15 January 2005 |
|
3 |
New
Construction Noise Permits GW-RS0670-04 and GW-RS0672-04 (Ref. H2189/C1/11583/MP/ST/atm) |
- |
12 January 2005 |
|
4 |
Admission
Ticket for Disposal of Special Waste at Landfill (Ref.
H2189/C1/11552/MP/DC/CKA/ST/atm). |
- |
11 January 2005 |
|
5 |
New
Construction Noise Permit GW-RS0671-04 (Ref. H2189/C1/11539/MP/ST/atm) |
- |
10 January 2005 |
|
6 |
Advance
Notification of Night-time Construction Work (PLA) (Ref.
H2189/C1/11514/MP/EY/ST/atm). |
- |
8 January 2005 |
A summary of the Environmental Certification Sheet submissions to EPD
during the reporting month is presented in Table 2.3.
|
No |
Certification
Subject |
Letter Ref. |
Date of
Submission to EPD |
Approved
Status |
|
1 |
Certification of Monthly Environmental Report
No. 17 - December 2004 |
3128/M45/200/OC6815/AC/al |
13
January 2005 |
- |
No environmental meetings were held during
the reporting month.
The environmental monitoring locations are
provided in Annex C.
The EM&A programme requires environmental monitoring for air
quality, noise, water quality, waste management and landscape and visual
aspects as specified in the CRIII Project EIA.
The EM&A requirements for each issue area are described in
subsequent sections including:
·
All required monitoring parameters;
·
Action and Limit Levels; and
·
Event-Action Plans.
A summary of impact EM&A requirements is presented in Table
3.1.
|
Descriptions |
Locations |
Frequencies |
Duration |
|||
|
TSP |
24-Hour
TSP |
2
Locations |
Once
every 6 days |
During
dust generating construction works |
||
|
1-Hour
TSP |
2
Locations |
Three
times in every 6 days |
During
dust generating construction works |
|||
|
Noise |
Leq (30 mins), L10, L90, |
1 Location |
Continuous
measurements |
Two
weeks before Construction and During Construction |
||
|
Water
Quality |
Dissolved
Oxygen; Salinity; Temp; Suspended
Solids; Turbidity. |
14
Locations |
3 times
a week, Mid-ebb/flood tides |
During
Marine Works |
||
|
Waste |
On-Site
Waste Audit |
Active
Work Sites |
Periodically |
During
Construction |
||
|
On-Site
Waste Inspection |
||||||
|
Landscape
and Visual |
Audits
to ensure effective implementation of mitigation measures |
During
Construction |
||||
|
General
Site Conditions |
Environmental Site Inspection |
Works
areas and areas affected by works |
Periodically |
During
Construction |
||
Environmental Quality Performance Limits for air, noise and water
quality as provided in the Baseline Monitoring Report (Final) are shown in
Annex D.
The Event Action Plans for air, noise and water quality as provided in
the Baseline Monitoring Report (Final) are shown in Annex E.
The Contractor is required to implement mitigation measures listed in
the EIA Report, EM&A Manual and Further Environmental Permit. During routine site inspections, the
Contractor's implementation of mitigation measures is reviewed. With regard to mitigation measures for water
quality, the Contractor has installed frame type silt curtains for rock filling
works to reduce SS dispersion. Further,
the Contractor carried out daily visual inspection of the silt screens for
seawater intakes. Floating debris in
the project area was collected at least once everyday and in the water body
near cooling water intakes debris was collected at least three times a
day. Bi-weekly diving inspections for
the silt screens were also carried out during the reporting month.
Regular site inspections were carried out
to assess whether the project's environmental protection and pollution control
measures are in compliance with the contract specifications. Inspections were conducted on 6, 13, 20 and 27 January 2005.
Air quality monitoring has not commenced
yet as no significant work areas or construction activities with the potential
to impact air quality are within range of the closest air quality sensitive
receivers (ASR).
Continuous 24-hour noise monitoring was
conducted during this reporting period.
Impact water quality monitoring at all
monitoring stations was undertaken during this reporting month. The water quality monitoring schedule for
January 2005 is presented in Table 4.1.
|
Date of Sampling |
Tidal State |
Timing of Sampling |
|
3 January 2005 |
Mid Ebb |
15:10 - 17:50 |
|
Mid Flood |
10:50 - 13:29 |
|
|
5 January 2005 |
Mid Ebb |
07:39 - 10:58 |
|
Mid Flood |
12:14 - 15:06 |
|
|
7 January 2005 |
Mid Ebb |
08:26 - 11:21 |
|
Mid Flood |
13:20 - 15:56 |
|
|
10 January 2005 |
Mid Ebb |
10:44 - 13:45 |
|
Mid Flood |
15:29 - 18:06 |
|
|
12 January 2005 |
Mid Ebb |
12:32 - 15:17 |
|
Mid Flood |
07:39 - 10:53 |
|
|
14 January 2005 |
Mid Ebb |
13:47 - 16:37 |
|
Mid Flood |
08:47 - 12:04 |
|
|
17 January 2005 |
Mid Ebb |
15:19 - 17:50 |
|
Mid Flood |
10:56 - 13:34 |
|
|
19 January 2005 |
Mid Ebb |
07:36 - 10:52 |
|
Mid Flood |
12:08 - 14:43 |
|
|
21 January 2005 |
Mid Ebb |
09:10 - 12:30 |
|
Mid Flood |
15:34 - 18:35 |
|
|
24 January 2005 |
Mid Ebb |
10:44 - 12:57 |
|
Mid Flood |
15:15 - 17:45 |
|
|
26 January 2005 |
Mid Ebb |
12:00 - 14:34 |
|
Mid Flood |
07:27 - 10:35 |
|
|
28 January 2005 |
Mid Ebb |
12:28 - 15:07 |
|
Mid Flood |
07:30 - 10:53 |
|
|
31 January 2005 |
Mid Ebb |
14:15 - 15:56 |
|
Mid Flood |
09:12 - 11:59 |
Air quality monitoring will be performed in
accordance with the methodology described in the EM&A Manual once
construction activities requiring air quality monitoring commence. The locations of the monitoring stations at
City Hall and PLA Headquarters are shown in Annex C.
Continuous 24-hour noise monitoring was performed
in accordance with the methodology described in the EM&A Manual in the
reporting period. The location of the noise monitoring station at City Hall is
shown in Annex C.
Water quality monitoring was performed in
accordance with the methodology described in the EM&A Manual. Monitoring for the reporting month was
conducted at all stations, which comprises of 6 marine-based stations and 8
seawater intake stations. The locations
of the monitoring stations are shown in Annex C.
The equipment that is used
for air quality monitoring is listed in Table 4.2.
|
Parameter Measured |
Equipment |
|
24-Hour Sampling |
High Volume Sampler Model
GS2310 by Anderson Instruments to be used for both monitoring stations. |
|
1-Hour Sampling |
MicroDust pro Aerosol
Monitoring System to be used for both monitoring locations. |
The equipment used for
continuous noise quality monitoring is listed in Table 4.3.
|
Equipment |
Model |
|
Integrated Sound Level Meter (SLM) |
B&K 2238 |
|
Calibrator |
B&K 4231, Class 1 |
The equipment that was used
for water quality monitoring is listed in Table 4.4.
|
Parameter Measured |
Equipment |
|
Dissolved Oxygen and Temperature Measuring Equipment |
A Dissolved Oxygen meter YSI model 58 was used. ·
This
instrument was portable and weatherproof and used a DC power source. The equipment was capable of measuring: ·
DO levels
in the range of 0-20 mg/l and 0-200% saturation; and ·
Temperature
of between 0 - 45 degree Celsius. ·
The
equipment had a membrane electrode with an automatic temperature compensation
complete with a cable. In addition, a Wirling Psychrometer was used as a
reference thermometer during the sampling. |
|
Turbidity Measurement Instrument |
|
|
PH |
A MP125 pH Meter from Mettler Toledo was used to measure pH. |
|
Salinity / Conductivity Meter |
A Salinity / Conductivity meter YSI model 63 and model 30 was used for determining salinity concentrations. |
|
Sample Containers and Storage |
Water samples for SS analysis were stored in high density polythene bottles with no preservative added, packed in ice and delivered to the laboratory, and analysed as soon as possible after collection. |
The calibration frequencies
of the monitoring equipment are provided in Table 4.5.
|
Equipment |
Calibration Frequency |
Latest Calibration Date |
|
Dissolved Oxygen Meter |
Every 6 months |
26 October 2004 |
|
Turbidimeter |
Every 3 months for
secondary standards; meter is calibrated prior to each measurement to the
secondary standards |
26 October 2004 |
|
pH Meter |
Prior to each sampling day |
- |
|
Pyschrometer |
Every 6 months |
5 October 2004 |
|
Integrated SLM |
Every year |
20 August 2004 |
No air quality monitoring work was undertaken
during the reporting period as no
significantly dusty construction activities with the potential to impact air
quality are within range of the closest air quality sensitive receivers.
Noise quality monitoring work was undertaken
during the reporting period. The noise
monitoring results are provided in Annex F. Graphical representation of the noise
monitoring data is provided in Annex G.
Water quality monitoring was undertaken at
all water quality monitoring locations during the reporting period. The water quality monitoring results from
this reporting period are presented in Annex H. Graphical representation of the water quality data is provided in
Annex
I. Summaries of the results are
provided in Tables 4.5 to 4.9.
Marine-Based Stations
Monitoring stations M8 and M10 were selected as the marine-based impact
stations as they are located outside the predicted influence of the dredging
and reclamation works. The detection of
water quality degradation at these two stations may indicate that project
marine works are adversely affecting water quality in Victoria Harbour. Stations M7 and M9 are within the expected
influence of the reclamation activities and are located along the works area
boundary (or extent of the predicted sediment plume). As such, M7 and M9 are used as indicator stations to note any significant
elevations in SS, turbidity or reductions in DO that may affect the
marine-based impact monitoring stations.
Table 4.5 is a summary of the marine-based stations
monitoring results during mid-ebb tide.
|
Station |
|
Parameter |
||||
|
DO (S&M) mg/L |
DO (B) mg/L |
DO % Sat. (DA) |
Turbidity (DA) NTU |
SS (DA) mg/L |
||
|
C1 |
min |
5.5 |
5.5 |
68 |
2.4 |
3 |
|
max |
7.4 |
7.1 |
92 |
5.3 |
5 |
|
|
avg |
6.5 |
6.4 |
82 |
3.6 |
4 |
|
|
sd |
0.5 |
0.5 |
6 |
1.0 |
0 |
|
|
C2 |
min |
5.4 |
5.3 |
67 |
2.4 |
3 |
|
max |
7.8 |
7.6 |
97 |
5.3 |
5 |
|
|
avg |
6.5 |
6.3 |
81 |
3.3 |
4 |
|
|
sd |
0.6 |
0.6 |
7 |
0.8 |
1 |
|
|
M7 |
min |
5.5 |
5.4 |
69 |
2.5 |
3 |
|
max |
7.2 |
6.9 |
89 |
4.6 |
5 |
|
|
avg |
6.2 |
6.2 |
79 |
3.3 |
4 |
|
|
sd |
0.5 |
0.4 |
5 |
0.6 |
0 |
|
|
M8 |
min |
5.7 |
5.4 |
69 |
2.3 |
3 |
|
max |
7.9 |
7.9 |
99 |
4.8 |
5 |
|
|
avg |
6.5 |
6.4 |
82 |
3.3 |
4 |
|
|
sd |
0.6 |
0.7 |
7 |
0.7 |
1 |
|
|
M9 |
min |
5.4 |
5.5 |
67 |
2.9 |
3 |
|
max |
7.3 |
7.3 |
92 |
4.8 |
5 |
|
|
avg |
6.1 |
6.2 |
78 |
3.7 |
4 |
|
|
sd |
0.5 |
0.5 |
6 |
0.7 |
1 |
|
|
M10 |
min |
5.4 |
5.6 |
68 |
2.2 |
4 |
|
max |
7.2 |
7.0 |
90 |
4.7 |
5 |
|
|
avg |
6.3 |
6.2 |
79 |
3.4 |
4 |
|
|
sd |
0.4 |
0.4 |
5 |
0.8 |
0 |
|
As Table 4.5 shows, DO levels at marine-based impact
stations (M8 & M10) in the surface to middle layer during mid-ebb survey
ranged between 5.4 and 7.9 mg/L with an average value of 6.4 mg/L and DO
measurements in the bottom layer ranged from 5.4 to 7.9 mg/L with an average
level of 6.3 mg/L. Similar DO levels
were recorded at the control stations at which DO levels in the surface to
middle layer during mid-ebb survey ranged from 5.4 to 7.8 mg/L with an average
value of around 6.5 mg/L; DO measurements in the bottom layer ranged between
5.3 and 7.6 mg/L with an average level of 6.3 mg/L.
SS levels during mid-ebb tide ranged from 3 to 5 mg/L with an average
value of 4 mg/L at the marine-based impact stations (M8 & M10), which is
comparable to results from the control stations in which SS content ranged from
3 to 5 mg/L with an average of 4 mg/L.
Generally, the results showed no clear gradient effect, which indicates
that marine works are not adversely affecting marine water quality outside the
work site boundary in Victoria Harbour.
Marine water quality at impact monitoring stations was found to be
similar to that at the control stations also indicating that project marine
works were generally not adversely affecting water quality in Victoria Harbour.
Table 4.6 is a summary of monitoring results from
marine-based stations during mid-flood tide.
|
Station |
|
Parameter |
||||
|
DO (S&M) mg/L |
DO (B) mg/L |
DO % Sat. (DA) |
Turbidity (DA) NTU |
SS (DA) mg/L |
||
|
C1 |
min |
5.6 |
5.3 |
69 |
2.5 |
3 |
|
max |
7.8 |
7.9 |
98 |
6.1 |
5 |
|
|
avg |
6.6 |
6.5 |
83 |
3.7 |
4 |
|
|
sd |
0.5 |
0.6 |
7 |
1.0 |
1 |
|
|
C2 |
min |
5.9 |
5.5 |
72 |
2.2 |
3 |
|
max |
7.7 |
7.5 |
95 |
5.3 |
6 |
|
|
avg |
6.5 |
6.2 |
81 |
3.5 |
4 |
|
|
sd |
0.5 |
0.5 |
6 |
0.9 |
1 |
|
|
M7 |
min |
5.5 |
5.3 |
68 |
2.9 |
3 |
|
max |
7.5 |
7.5 |
94 |
4.9 |
6 |
|
|
avg |
6.3 |
6.2 |
79 |
3.8 |
4 |
|
|
sd |
0.6 |
0.6 |
7 |
0.7 |
1 |
|
|
M8 |
min |
5.8 |
5.7 |
72 |
2.8 |
3 |
|
max |
7.7 |
7.8 |
96 |
6.1 |
6 |
|
|
avg |
6.5 |
6.4 |
82 |
3.9 |
4 |
|
|
sd |
0.5 |
0.5 |
6 |
0.9 |
1 |
|
|
M9 |
min |
5.4 |
5.2 |
66 |
2.5 |
2 |
|
max |
7.4 |
7.5 |
92 |
4.8 |
6 |
|
|
avg |
6.3 |
6.1 |
78 |
3.8 |
5 |
|
|
sd |
0.5 |
0.6 |
6 |
0.7 |
1 |
|
|
M10 |
min |
5.6 |
5.7 |
70 |
2.6 |
2 |
|
max |
7.7 |
7.7 |
96 |
5.0 |
5 |
|
|
avg |
6.5 |
6.4 |
82 |
3.3 |
4 |
|
|
sd |
0.5 |
0.5 |
7 |
0.6 |
1 |
|
During mid-flood tide, DO levels at marine-based impact stations (M8
& M10) in the surface to middle layer ranged from 5.6 to 7.7 mg/L with an
average level of 6.5 mg/L while DO values in the bottom layer ranged between
5.7 and 7.8 mg/L with an average of 6.4 mg/L.
Similar DO concentrations were recorded at the control stations in the
surface to middle layer during mid-flood survey ranged between 5.6 and 7.8 mg/L
with an average value of 6.6 mg/L and DO results in the bottom layer ranged
from 5.3 and 7.9 mg/L with an average of 6.4 mg/L.
SS content ranged between 2 and 6 mg/L (for stations M8 & M10) with
an average of 4 mg/L during mid-flood tide and ranged from 3 to 6 mg/L with an
average value of 4 mg/L at the control stations. Again, the results showed no clear gradient effect and no
significant difference between control stations and marine-based impact
stations. Therefore, the marine-based
station results indicate that during the reporting month the dredging works
were not adversely affecting water quality outside the work site boundary.
Seawater Intake Stations
Table 4.7 is a summary of monitoring results from seawater
intake stations during mid-ebb tide.
|
Station |
|
Parameter |
|||
|
DO mg/L |
DO % Sat. |
Turbidity NTU |
SS mg/L |
||
|
M1 |
min |
5.4 |
68 |
2.9 |
4 |
|
max |
7.4 |
78 |
5.3 |
6 |
|
|
avg |
5.9 |
73 |
4.0 |
5 |
|
|
sd |
0.5 |
3 |
0.8 |
1 |
|
|
M2 |
min |
5.1 |
64 |
3.2 |
5 |
|
max |
6.7 |
74 |
7.5 |
12 |
|
|
avg |
5.6 |
69 |
4.3 |
8 |
|
|
sd |
0.4 |
3 |
1.2 |
2 |
|
|
M3 |
min |
5.0 |
64 |
2.5 |
5 |
|
max |
6.5 |
75 |
5.9 |
8 |
|
|
avg |
5.6 |
69 |
3.6 |
6 |
|
|
sd |
0.4 |
4 |
0.9 |
1 |
|
|
M4 |
min |
5.1 |
64 |
2.2 |
4 |
|
max |
6.6 |
77 |
4.2 |
7 |
|
|
avg |
5.7 |
70 |
2.9 |
5 |
|
|
sd |
0.4 |
4 |
0.6 |
1 |
|
|
M5 |
min |
5.0 |
63 |
2.0 |
3 |
|
max |
6.6 |
78 |
7.6 |
9 |
|
|
avg |
5.6 |
69 |
3.9 |
6 |
|
|
sd |
0.4 |
4 |
1.6 |
2 |
|
|
M6 |
min |
5.2 |
65 |
2.4 |
4 |
|
max |
6.6 |
77 |
7.8 |
9 |
|
|
avg |
5.6 |
69 |
3.9 |
6 |
|
|
sd |
5.2 |
65 |
2.4 |
4 |
|
|
M11 |
min |
5.2 |
67 |
2.5 |
4 |
|
max |
7.0 |
76 |
5.0 |
6 |
|
|
avg |
5.7 |
71 |
3.6 |
5 |
|
|
sd |
0.5 |
3 |
0.7 |
1 |
|
|
M12 |
min |
5.1 |
64 |
2.6 |
4 |
|
max |
6.4 |
75 |
7.1 |
10 |
|
|
avg |
5.6 |
69 |
3.7 |
6 |
|
|
sd |
0.4 |
4 |
1.2 |
1 |
|
Seawater intake results during mid-ebb tide, Table 4.7, show that DO levels ranged from 5.0 to 7.4 mg/L with an average of 5.6 mg/L. SS ranged between 3 and 12 mg/L with an average value of 6 mg/L. No elevated SS levels were recorded during mid-ebb tide sampling.
Table 4.8 is a summary of monitoring results from seawater
intake stations during mid-flood tide.
|
Station |
|
Parameter |
|||
|
DO mg/L |
DO % Sat. |
Turbidity NTU |
SS mg/L |
||
|
M1 |
min |
5.2 |
66 |
2.6 |
4 |
|
max |
6.4 |
81 |
5.6 |
8 |
|
|
avg |
5.8 |
73 |
4.0 |
6 |
|
|
sd |
5.2 |
66 |
2.6 |
4 |
|
|
M2 |
min |
5.1 |
65 |
2.9 |
4 |
|
max |
5.9 |
74 |
5.2 |
9 |
|
|
avg |
5.6 |
70 |
3.8 |
7 |
|
|
sd |
0.3 |
3 |
0.7 |
1 |
|
|
M3 |
min |
5.2 |
67 |
2.9 |
4 |
|
max |
5.9 |
74 |
5.4 |
8 |
|
|
avg |
5.5 |
70 |
3.7 |
6 |
|
|
sd |
0.2 |
3 |
0.7 |
1 |
|
|
M4 |
min |
5.2 |
66 |
2.1 |
4 |
|
max |
6.1 |
76 |
41.5 |
52 |
|
|
avg |
5.6 |
71 |
6.4 |
9 |
|
|
sd |
0.2 |
3 |
10.7 |
13 |
|
|
M5 |
min |
4.9 |
62 |
2.1 |
3 |
|
max |
5.9 |
75 |
4.5 |
7 |
|
|
avg |
5.3 |
67 |
3.1 |
5 |
|
|
sd |
0.3 |
3 |
0.6 |
1 |
|
|
M6 |
min |
4.8 |
61 |
2.6 |
4 |
|
max |
6.1 |
76 |
4.8 |
8 |
|
|
avg |
5.5 |
69 |
3.8 |
6 |
|
|
sd |
0.4 |
5 |
0.8 |
1 |
|
|
M11 |
min |
5.1 |
65 |
2.4 |
4 |
|
max |
6.2 |
78 |
4.7 |
7 |
|
|
avg |
5.6 |
70 |
3.5 |
6 |
|
|
sd |
0.3 |
4 |
0.7 |
1 |
|
|
M12 |
min |
4.9 |
62 |
2.5 |
4 |
|
max |
5.9 |
75 |
5.0 |
8 |
|
|
avg |
5.5 |
69 |
3.7 |
6 |
|
|
sd |
0.4 |
4 |
0.8 |
1 |
|
No waste management audit was scheduled
within this reporting period. The
arrangement of waste management audit is detailed in the Waste Management Plan.
As the major construction activities undertaken during the reporting month were related to marine works, the landscape and visual impacts are considered to be minimal.
The total number of exceedances for air,
noise and water quality are presented in following sections.
No air quality monitoring work was undertaken
during the reporting period.
Noise quality exceedances were recorded on 3, 4, 5, 13 and 28 January
2005. However, investigations into
these exceedances found that they were not due to the project works. The noise levels were attributable to
passer-by activities at the drop-off area in front of City Hall. There are no project works located in the
vicinity of City Hall. It is also noted
that external contractors are still undertaking exterior renovation works at
City Hall, and these works have a direct influence on the noise monitoring
station.
Water quality was found to
be generally good during the reporting month.
One exceedance was recorded during the month of January 2005.
One elevated SS level was recorded at station
M4 on 26 January 2005. The exceedance
was investigated and was found to be attributable to bermstone removal works in
IRAE. All parties were immediately
informed of the exceedance and the Contractor temporarily suspended the
bermstone removal works until an additional silt curtain surrounding the
affected seawater intake was installed.
A subsequent site inspection did not find any sediment plumes in the
area and no further water quality impacts from the bermstone removal works were
observed.
No exceedances of DO were
recorded during the reporting period.
Visual observations of the
harbour during the reporting month noted the presence of floating debris in
Victoria Harbour.
No non-compliances with regard to waste
management were recorded in the reporting month.
No non-compliance with regard to landscape
and visual aspects were recorded in the reporting month.
No environmental non-compliances were found
during environmental site inspections conducted during the reporting
period.
A summary of the findings from the site
inspections conducted during the reporting month is provided in Table 5.1.
|
Date of
Inspection |
Observations |
Action(s) |
|
6
January 2005 |
A bore piling machine at IRAW was found to
be leaking hydraulic fluid. |
The Contractor was asked to make the
necessary repairs and clean up the leaked fluids. |
|
13
January 2005 |
A small amount of grease was found on the
deck of a flat top barge operated by Sam Woo. |
The Contractor was asked to clean up the grease
stains. |
|
Silty water was found leaking from the
water main connection works at the GPO. |
The Contractor was asked to pump the silty
water to the nearby sedimentation tank for treatment. |
|
|
20
January 2005 |
An excavator at the works area behind the
General Post Office was found to be leaking hydraulic oil. |
The Contractor was asked to make the
appropriate repairs and clean up the leaked oil |
|
27
January 2005 |
An unmarked container was found at CR-12. |
The Contractor was asked to attach a
proper label to the container. |
|
It was observed that the Contractor has
installed an additional floating type silt curtain around the silt screen at
monitoring station M4. |
No further actions are required. |
|
|
The water inside and outside the silt
screen appears to be in good condition and no sediment plumes were observed. |
No further actions are required. |
No significant sediment plumes were observed
near the marine works during the site inspections.
No environmental complaints and no prosecution notices or summons were
received during the reporting month.
No environmental enquiries were received
during the reporting month.
The key issues to be considered in the coming
month include the following:
·
Architectural works for Pier
No. 7;
·
Obstruction removal and
preparation work for pile cap construction at Pier No. 8;
·
Removal of piling
obstructions at Public Pier West and piling works;
·
In-situ work for the pumping
stations installed at IRAW;
·
Placing of armour rock for
the temporary seawall at IRAW;
·
Land piling works and
substructure construction for the Central Terminal Building (CTB);
·
Land piling work for the Man
Yiu Street Footbridge;
·
Seawall construction at IRAE
·
Rock filling and sand
filling works at IRAE;
·
In-situ work for the pumping
station and caissons installed at IRAE;
·
Detach buoyancy tanks from
installed caisson units at IRAE;
·
Temporary intake pipes
installation;
·
Cooling watermains work at
Lung Wui Road;
·
Remedial work for Culvert F;
·
Excavation to bored piling
at Eastern Seawall; and
·
Maintenance and necessary
repair works for seawater intake silt screens.
Based on the Contractor’s programme, the
Environmental Monitoring Programme for the next three months is planned as
follows:
TSP (24 hr and 1 hr monitoring)
Upon commencement of significant dust generating
activities within range of the closest air quality sensitive receiver,
dependent upon the Contractor’s programme.
Noise
(Continuous Measurements)
The noise monitoring programme throughout the
entire construction period is 24-hour continuous.
Water Quality Monitoring
The water quality monitoring schedule for the
upcoming months is provided in the following table.
|
Date of Sampling |
Sampling Time |
|
|
2 February 2005 |
11:28 |
17:00 |
|
4 February 2005 |
08:30 |
13:30 |
|
7 February 2005 |
11:27 |
16:13 |
|
14 February 2005 |
10:16 |
16:31 |
|
16 February 2005 |
11:31 |
18:57 |
|
18 February 2005 |
09:08 |
17:30 |
|
21 February 2005 |
11:14 |
15:53 |
|
23 February 2005 |
12:00 |
17:00 |
|
25 February 2005 |
08:30 |
13:30 |
|
28 February 2005 |
08:52 |
14:53 |
The construction programme for the next 3
months is provided in Annex B and will be updated by the
Contractor.
The ET will follow the Contractor’s proposed programme to ensure the compliance of environmental performance and proper implementation of all necessary mitigation measures.
During the reporting period,
one exceedance of the water quality criteria was recorded. The ambient water quality was found to be in
relatively good condition for January 2005.
Visual observations of the harbour during the reporting month noted the
presence of some floating debris, which did not originate from the project.
No DO exceedances were
recorded during the reporting period.
However, one elevated SS level was detected on 26 January 2005. Investigations into this exceedance found
that it was due to bermstone removal works carried out in IRAE. All parties were
immediately informed of the exceedance and the Contractor immediately took
appropriate actions and installed additional mitigation measures. Subsequent monitoring and site inspections
did not find any sediment plumes in the area and no further water quality
impacts were observed.
The monitoring work for this
reporting month has been independently verified by the Independent
Environmental Checker (IEC) and has been found to be in compliance with the
requirements of the EM&A programme.