|
Client |
Territory Development Department, Hong Kong |
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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-174-00 |
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Date of Issue |
10 June 2004 |
File
Ref. L:\S-proj\CR3\CR3.NEW\3128\
Reports\0174.doc |
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|
Report Title |
Central
Reclamation, Phase III Environmental
Monitoring & Audit Monthly
Report No. 10 - May 2004 |
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Name |
Sign |
Date |
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Prepared
by : |
Albert Chan,
ACL - Environmental Consultant |
|
10
June 2004 |
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|
Reviewed by : |
Susana
Bezy, ACL – ET Leader |
|
10
June 2004 |
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Authorised by : |
Jon
Varndell, ACL – Project Mgr |
|
10
June 2004 |
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Distribution |
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|
Copy No |
Issue to |
Attention |
Corr. Ref. |
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|
1 |
TDD |
Mr
H H Yeung |
3128/M45/200/OC6081/al |
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|
2,
3 |
EPD |
Mr
M W Ho |
3128/M45/200/OC6081/al |
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|
4 |
EPD
(LCO) |
Mr
Allan Hung |
3128/M45/200/OC6081/al |
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|
5 |
Leighton-China
State-Van Oord JV |
Mr
Malcolm Plummer |
3128/M45/200/OC6081/al |
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|
6 |
CRIII
Sites/PRE |
Mr
Douglas Miller |
3128/M45/200/OC6081/al |
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|
7 |
Independent
Checker (Environment) |
Mr
Bill Douglas |
3128/M45/200/OC6081/al |
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8 |
Environmental
Team Leader |
Ms
Susana Bezy |
3128/M45/200/OC6081/al |
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9 |
Office
Copy |
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1. INTRODUCTION
2.3 Environmental Document Submission
2.5 Environmental
Monitoring Locations
3.1 Summary
of Impact EM&A Requirements
3.2 Environmental Quality Performance Limits
3.4 Implementation of Environmental Measures
4.1 Impact Monitoring Schedule in
April 2004
5. Environmental
Complaint and Non-Compliance
5.2 Environmental Complaint and
Prosecution
6.1 Key
Issues for the Coming Month
6.2 Monitoring Schedules for the
Next 3 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................................................ 3
Table 2.2 - Summary of the Contractor's Environmental Related Document
Submissions to the
Engineer’s
Representatives (ER).................................................................................. 5
Table 2.3 - Summary of Environmental Certification Sheet Submissions to
the Environmental
Protection
Department (EPD).................................................................................... 7
Table 3.1 -
Summary of Impact EM&A Requirements................................................................... 9
Table
4.1 - Water Quality Monitoring Programme (Seawater Intakes Stations)............................ 12
Table
4.2 - Equipment for Air Quality
Monitoring...................................................................... 13
Table
4.3 - Noise Monitoring Equipment.................................................................................... 15
Table
4.4 - Equipment Used for Marine Water Quality Monitoring............................................. 16
Table
4.5 - Equipment Calibration Frequencies........................................................................... 17
Table
4.5 - Summary of Mid-Ebb Results for Marine-Based Stations............................................ 18
Table
4.6 - Summary of Mid-Flood Results for Marine-Based Stations......................................... 19
Table
4.7 - Summary of Mid-Ebb Results for Seawater Intake Stations......................................... 21
Table
4.8 - Summary of Mid-Flood Results for Seawater Intake Stations...................................... 22
Table
6.1 - Water Quality Monitoring Programme...................................................................... 26
Air
Quality Action and Limit Levels for the City Hall Moni......................................................... 28
|
ACL |
Atkins China Limited |
|
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 Works,
Contract No. HK 12/02, was awarded to Leighton China State Van Oord Joint
Venture (LCSVO-JV) by the Territory Development Department (TDD), 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 TDD 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 tenth 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 May 2004.
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 May 2004.
·
Noise monitoring was performed continuously for 24
hours.
·
Water quality monitoring was undertaken on the
following days:
-
3 May 2004
-
5 May 2004
-
7 May 2004
-
10 May 2004
-
12 May 2004
-
14 May 2004
-
17 May 2004
-
19 May 2004
-
21 May 2004
-
24 May 2004
-
26 May 2004
-
28 May 2004
-
31 May 2004
Exceedance of Action and Limit Levels
There was no environmental air quality monitoring required during the
reporting period.
The noise monitoring carried out during the reporting did not find any exceedances
that were attributable to the project works.
Although the continuous monitoring data recorded instances where the Leq
(30 minutes) exceeded 75 dB(A), investigations into these levels found that
they were due to local noise conditions at the City Hall monitoring location
and were not due to the project.
Previous off-site inspections carried out by the IEC noted that the main
sources of noise near City Hall were from helicopter and vehicle traffic and
passer-by activities in the area.
From the analysis of water quality monitoring results collected during
the reporting period, no exceedances were identified as being directly
attributable to the project marine works.
However, the dissolved oxygen (DO) and suspended solids (SS) levels
exceeded the Action and Limit Levels on one occasion and six occasions
respectively. Investigations found that
they were due to natural variation in ambient conditions and/or local
influencing factors. A review of the
monitoring results showed that control stations located outside the project's
influence had similar values as marine impact stations and seawater intake
monitoring data showed variable results with localised exceedances near
stormwater outfalls. These findings were
similar to the conditions observed during baseline monitoring and silty
discharges from outfalls within the project area were documented during the
reporting month.
Complaint Log
There were no environmental complaints
received during this 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 May 2004. No environmental non-conformance and
deficiencies were observed during the site inspections.
Future Key Issues
Future Key Issues are as follows:
·
The temporary installation of pre-cast seawall
caissons in IRAW is planned for early June 2004. Previously, Cinotech Consultants Ltd. on behalf of the Contractor
has conducted an environmental review of the unloading operation. The review did not find any significant
environmental impacts with the planned works.
·
Dredging work for the remaining portions in IRAE.
·
Marine piling works and rock filling works.
·
Landside piling for the Central Terminal Building
(CTB).
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. Construction works undertaken during the
reporting month include dredging, reclamation up to the original seabed level
only, marine site investigation, demolition preparation work at General Post
Office (GPO) Walkway and remedial works at Culvert F.
Atkins China Limited (ACL) has been commissioned by TDD 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 tenth monthly
EM&A Report under the EIAO, which presents the results of EM&A
work conducted during the period from 1 to 31 May 2004, inclusive.
The works undertaken during the reporting
month include dredging and rock filling works, marine piling at IRAW, pre-bored
H-piles work for Central Terminal Building (CTB), watermain diversion at the
CTB, superstructure works for Pier No. 7, cooling watermains work at Lung Wui
Road 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 |
LCSVO-JV submitted a
clarification of application material for an Application for a Permit to Dump
Material (Contaminated Sediment) at Sea Under the Dumping at Sea Ordinance
(Ref. H2189/U2c/7115/MP/EY/ST/atm) |
21 May
2004 |
- |
|
2 |
LCSVO-JV submitted an
Application for Construction Noise Permit for Unloading and Temporary Storage
of Pre-cast Caisson Units (Ref. H2189/U2c/6922/MP/EY/MB/ST/cm) |
13 May
2004 |
- |
|
3 |
LCSVO-JV submitted an
Application for a Permit to Dump Material (Contaminated Sediment) at Sea
Under the Dumping at Sea Ordinance (H2189/U2c/6768/MP/EY/ST/ cm). |
10 May
2004 |
- |
|
4 |
LCSVO-JV submitted a
letter informing the termination of employment of Hopper Barge (HB SHB 1026)
for Dumping Operation Under the Dumping at Sea Ordinance (H2189/
U2c/6829/MP/EY/ST/cm) |
10 May
2004 |
- |
|
Table 2.2 - Summary of the
Contractor's Environmental Related Document Submissions to the Engineer’s
Representatives (ER) |
|
Item |
Document
Title |
Version |
Date of
Submission to ER |
|
1 |
Photographs
of Silty Discharge (19, 22 and 24 May 2004) |
- |
29 May 2004 |
|
2 |
Construction
Noise Permit GW-TS0219-04 |
- |
28 May 2004 |
|
3 |
Construction
Noise Permit GW-TS0193-04 |
- |
18 May 2004 |
|
4 |
Photographs
of Silty Discharge |
- |
17 May 2004 |
|
5 |
Construction
Noise Permit GW-TS0189-04 |
- |
14 May 2004 |
|
6 |
Construction
Noise Permit GW-TS0185-04 |
- |
12 May 2004 |
|
7 |
Photographs
of Silty Discharge (7 & 10 May 2004) |
- |
10 May 2004 |
|
8 |
Photographs
of Silty Discharge ( 5 & 6 May 2004) |
- |
6 May 2004 |
|
9 |
Marine
Dumping Permit (Uncontaminated) EP/MD/ 04-149 |
- |
5 May 2004 |
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. 9 - April 2004 |
3128/M45/200/OC6016/AC/al |
21 May
2004 |
- |
|
2 |
Certification of Quarterly Environmental
Report No. 3 - February 2004 through
April 2004 |
3128/M45/200/OC6017/AC/al |
21 May
2004 |
- |
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 carried out daily visual inspection of the silt screens
for seawater intakes. Bi-weekly diving
inspections for the silt screens were also carried out in May 2004. During the reporting month, there were no
records of the Contractor not implementing relevant mitigation measures.
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 May 2004.
Air quality monitoring has not commenced
yet as no work areas or construction activities with the potential to impact
air quality are within range of the closest air quality sensitive receivers.
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
May 2004 is presented in Table 4-1.
|
Date of Sampling |
Tidal State |
Timing of Sampling |
|
3 May 2004 |
Mid Ebb |
10:06 - 13:01 |
|
Mid Flood |
15:33 - 18:07 |
|
|
5 May 2004 |
Mid Ebb |
10:53 - 13:40 |
|
Mid Flood |
15:46 - 18:15 |
|
|
7 May 2004 |
Mid Ebb |
12:32 - 15:06 |
|
Mid Flood |
07:25 - 10:48 |
|
|
10 May 2004 |
Mid Ebb |
15:30 - 18:01 |
|
Mid Flood |
07:43 - 10:44 |
|
|
12 May 2004 |
Mid Ebb |
15:24 - 17:54 |
|
Mid Flood |
10:40 - 13:26 |
|
|
14 May 2004 |
Mid Ebb |
08:11 - 11:07 |
|
Mid Flood |
13:08 - 15:51 |
|
|
17 May 2004 |
Mid Ebb |
10:40 - 14:06 |
|
Mid Flood |
15:17 - 17:55 |
|
|
19 May 2004 |
Mid Ebb |
11:11 - 14:10 |
|
Mid Flood |
15:50 - 18:11 |
|
|
21 May 2004 |
Mid Ebb |
11:43 - 14:10 |
|
Mid Flood |
07:03 - 09:50 |
|
|
24 May 2004 |
Mid Ebb |
13:32 - 16:25 |
|
Mid Flood |
07:40 - 10:36 |
|
|
26 May 2004 |
Mid Ebb |
15:20 - 17:48 |
|
Mid Flood |
07:26 - 10:42 |
|
|
28 May
2004 |
Mid Ebb |
15:13 - 17:44 |
|
Mid Flood |
10:50 - 13:33 |
|
|
Mid
Ebb |
09:02
- 11:55 |
|
|
Mid
Flood |
14:47
- 17:28 |
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 the following table.
|
Equipment |
Calibration Frequency |
|
Dissolved Oxygen Meter |
Every 6 months |
|
Turbidimeter |
Every 3 months for secondary
standards; meter is calibrated prior to each measurement to the secondary
standards |
|
pH Meter |
Prior to each sampling day |
|
Pyschrometer |
Every 6 months |
|
Integrated
SLM |
Every year |
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 |
5.1 |
4.1 |
72.7 |
4.4 |
3 |
|
max |
6.1 |
6.2 |
90.3 |
8.1 |
9 |
|
|
avg |
5.7 |
5.4 |
80.0 |
5.8 |
6 |
|
|
sd |
0.4 |
0.6 |
6.1 |
1.2 |
2 |
|
|
C2 |
min |
4.6 |
4.4 |
70.2 |
4.0 |
5 |
|
max |
6.2 |
6.0 |
91.5 |
7.4 |
9 |
|
|
avg |
5.5 |
5.3 |
77.8 |
5.4 |
6 |
|
|
sd |
0.5 |
0.6 |
7.1 |
1.1 |
1 |
|
|
M7 |
min |
4.9 |
4.5 |
69.3 |
4.1 |
4 |
|
max |
5.7 |
5.8 |
86.5 |
8.6 |
9 |
|
|
avg |
5.3 |
5.1 |
75.2 |
6.0 |
7 |
|
|
sd |
0.3 |
0.3 |
5.0 |
1.3 |
1 |
|
|
M8 |
min |
4.7 |
4.5 |
67.4 |
4.1 |
5 |
|
max |
5.9 |
6.3 |
86.9 |
8.7 |
9 |
|
|
avg |
5.3 |
5.2 |
75.2 |
5.8 |
6 |
|
|
sd |
0.4 |
0.5 |
5.4 |
1.4 |
1 |
|
|
M9 |
min |
4.8 |
4.2 |
67.9 |
4.4 |
3 |
|
max |
6.0 |
5.6 |
86.7 |
9.9 |
11 |
|
|
avg |
5.4 |
5.0 |
75.3 |
6.1 |
7 |
|
|
sd |
0.4 |
0.4 |
5.3 |
1.6 |
3 |
|
|
M10 |
min |
4.8 |
4.3 |
68.7 |
4.7 |
3 |
|
max |
6.1 |
5.5 |
89.7 |
8.4 |
8 |
|
|
avg |
5.4 |
5.0 |
76.3 |
5.6 |
6 |
|
|
sd |
0.4 |
0.4 |
5.9 |
1.1 |
2 |
|
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 4.6
and 6.2 mg/L with an average value of 5.7 mg/L and DO measurements in the
bottom layer ranged from 4.1 to 6.2 mg/L with an average level of 5.4
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 4.7 to 6.1 mg/L with an average value of
around 5.4 mg/L; DO measurements in the bottom layer ranged between 4.3 and 6.3
mg/L with an average level of 5.2 mg/L.
SS levels during mid-ebb tide ranged from 3 to 9 mg/L with an average
value of 6 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 9
mg/L with an average of 6 mg/L. The
results showed no clear gradient effect (high SS and low DO levels from
near-field stations M7 and M9 to far-field stations M8 and M10), which
indicates that dredging 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 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 |
5.0 |
4.3 |
72.4 |
4.0 |
4 |
|
max |
6.0 |
5.9 |
90.8 |
8.4 |
11 |
|
|
avg |
5.5 |
5.1 |
78.3 |
5.4 |
7 |
|
|
sd |
0.3 |
0.4 |
5.3 |
1.5 |
2 |
|
|
C2 |
min |
4.9 |
4.5 |
68.5 |
3.3 |
3 |
|
max |
6.0 |
6.3 |
90.5 |
6.8 |
8 |
|
|
avg |
5.3 |
5.2 |
77.5 |
5.2 |
6 |
|
|
sd |
0.4 |
0.6 |
7.0 |
1.0 |
1 |
|
|
M7 |
min |
4.1 |
4.5 |
62.9 |
4.4 |
4 |
|
max |
5.8 |
5.4 |
85.3 |
7.9 |
9 |
|
|
avg |
5.0 |
4.8 |
72.3 |
5.5 |
6 |
|
|
sd |
0.5 |
0.3 |
6.4 |
0.9 |
1 |
|
|
M8 |
min |
4.8 |
4.5 |
67.6 |
3.7 |
3 |
|
max |
5.6 |
5.6 |
80.8 |
7.2 |
9 |
|
|
avg |
5.2 |
4.9 |
74.2 |
5.3 |
6 |
|
|
sd |
0.3 |
0.3 |
4.3 |
0.9 |
2 |
|
|
M9 |
min |
4.5 |
4.5 |
65.2 |
3.9 |
3 |
|
max |
5.9 |
5.4 |
85.6 |
7.3 |
9 |
|
|
avg |
5.0 |
4.8 |
72.9 |
5.3 |
6 |
|
|
sd |
0.4 |
0.3 |
5.8 |
1.2 |
2 |
|
|
M10 |
min |
4.7 |
4.6 |
68.4 |
4.1 |
3 |
|
max |
5.9 |
5.6 |
84.3 |
7.8 |
9 |
|
|
avg |
5.2 |
4.8 |
74.4 |
5.4 |
6 |
|
|
sd |
0.4 |
0.3 |
5.4 |
1.2 |
2 |
|
During mid-flood tide, DO levels at marine-based impact stations (M8
& M10) in the surface to middle layer ranged from 4.7 to 5.9 mg/L with an
average level of 5.2 mg/L while DO values in the bottom layer ranged between
4.5 and 5.6 mg/L with an average of 4.9 mg/L.
Similar DO concentrations were recorded at the control stations in the
surface to middle layer during mid-flood survey ranged between 4.3 and 6.3 mg/L
with an average value of 5.4 mg/L and DO results in the bottom layer ranged
from 4.3 and 6.3 mg/L with an average of 5.1 mg/L.
SS content ranged between 3 and 9 mg/L (for stations M8 & M10) with
an average of 6 mg/L during mid-flood tide and ranged from 3 to 11 mg/L with an
average value of 6 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 |
4.1 |
63.8 |
5.9 |
6 |
|
max |
5.9 |
88.4 |
13.8 |
11 |
|
|
avg |
4.8 |
71.1 |
8.3 |
9 |
|
|
sd |
0.5 |
7.9 |
2.0 |
2 |
|
|
M2 |
min |
3.6 |
52.9 |
6.4 |
7 |
|
max |
5.3 |
78.3 |
10.6 |
18 |
|
|
avg |
4.3 |
64.0 |
8.6 |
13 |
|
|
sd |
0.6 |
7.9 |
1.5 |
4 |
|
|
M3 |
min |
3.8 |
55.8 |
3.9 |
6 |
|
max |
5.6 |
82.5 |
7.7 |
10 |
|
|
avg |
4.6 |
68.2 |
6.2 |
8 |
|
|
sd |
0.5 |
6.8 |
1.0 |
1 |
|
|
M4 |
min |
4.3 |
62.5 |
4.7 |
6 |
|
max |
6.1 |
90.0 |
8.7 |
12 |
|
|
avg |
4.9 |
72.9 |
6.2 |
8 |
|
|
sd |
0.6 |
8.4 |
1.1 |
2 |
|
|
M5 |
min |
4.3 |
64.2 |
4.2 |
6 |
|
max |
6.2 |
87.2 |
9.8 |
12 |
|
|
avg |
5.0 |
73.4 |
6.0 |
8 |
|
|
sd |
0.6 |
7.8 |
1.5 |
2 |
|
|
M6 |
min |
4.3 |
62.5 |
5.2 |
5 |
|
max |
5.9 |
86.6 |
8.7 |
15 |
|
|
avg |
5.2 |
76.0 |
6.6 |
9 |
|
|
sd |
4.3 |
62.5 |
5.2 |
5 |
|
|
M11 |
min |
4.2 |
61.1 |
4.8 |
5 |
|
max |
6.1 |
90.6 |
7.2 |
13 |
|
|
avg |
5.0 |
73.8 |
6.0 |
7 |
|
|
sd |
0.6 |
9.3 |
0.7 |
2 |
|
|
M12 |
min |
4.3 |
63.4 |
4.6 |
5 |
|
max |
5.5 |
80.5 |
8.4 |
13 |
|
|
avg |
5.1 |
74.4 |
5.9 |
7 |
|
|
sd |
0.4 |
5.5 |
1.1 |
2 |
|
Seawater intake results during mid-ebb tide, Table 4.7, show that DO levels ranged from 3.6 to 6.2 mg/L with an average of 5.2 mg/L. SS ranged between 5 and 18 mg/L with an average value of 9 mg/L. The monitoring results show that water quality at seawater intake stations was generally good. Only a few elevated SS levels, such as at stations M4 and M6, were found during the reporting month. Low DO levels at the intake stations were also recorded during the reporting month but investigations found that they were not due to project works The poor water quality at these stations are likely due to adverse impacts from outfalls located adjacent to the station. During the reporting month silty discharges from outfalls were observed and documented near stations M4 to M6 on 5-7, 10, 15, 19, 22 and 24 May 2004. Observations noted that the large patches of brown silty water generally dispersed westwards after discharging from the outfall. A figure showing the location of various outfalls along the seawall within the project area is shown in Annex C.
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 |
4.3 |
62.5 |
4.6 |
6 |
|
max |
5.8 |
86.4 |
10.2 |
12 |
|
|
avg |
4.8 |
72.1 |
7.1 |
8 |
|
|
sd |
4.3 |
62.5 |
4.6 |
6 |
|
|
M2 |
min |
3.8 |
55.8 |
6.9 |
7 |
|
max |
5.9 |
86.7 |
14.2 |
18 |
|
|
avg |
4.5 |
67.0 |
8.9 |
12 |
|
|
sd |
0.7 |
9.9 |
2.0 |
3 |
|
|
M3 |
min |
3.4 |
53.8 |
4.2 |
6 |
|
max |
6.4 |
94.6 |
9.8 |
14 |
|
|
avg |
4.6 |
67.4 |
6.9 |
9 |
|
|
sd |
0.8 |
11.1 |
1.5 |
2 |
|
|
M4 |
min |
3.9 |
58.2 |
4.8 |
5 |
|
max |
6.3 |
91.9 |
9.4 |
13 |
|
|
avg |
5.0 |
73.8 |
6.8 |
8 |
|
|
sd |
0.7 |
10.6 |
1.3 |
2 |
|
|
M5 |
min |
3.6 |
53.8 |
4.5 |
5 |
|
max |
6.1 |
90.8 |
10.1 |
13 |
|
|
avg |
4.7 |
69.9 |
6.6 |
8 |
|
|
sd |
0.8 |
12.1 |
1.8 |
2 |
|
|
M6 |
min |
3.7 |
53.7 |
4.3 |
5 |
|
max |
6.5 |
95.9 |
9.7 |
14 |
|
|
avg |
4.8 |
70.6 |
7.2 |
9 |
|
|
sd |
0.8 |
11.9 |
2.0 |
3 |
|
|
M11 |
min |
4.0 |
60.7 |
5.2 |
5 |
|
max |
6.3 |
92.5 |
8.9 |
13 |
|
|
avg |
5.1 |
74.7 |
7.0 |
8 |
|
|
sd |
0.7 |
10.4 |
1.0 |
2 |
|
|
M12 |
min |
3.6 |
52.2 |
4.4 |
5 |
|
max |
6.2 |
91.4 |
8.8 |
15 |
|
|
avg |
4.8 |
70.8 |
6.2 |
7 |
|
|
sd |
0.8 |
11.4 |
1.4 |
3 |
|
During
mid-flood survey, Table 4.8 shows that DO levels at seawater intake stations ranged
from 3.4 to 6.5 mg/L with an average of 5.1 mg/L. SS ranged from 5 to 18 mg/L with an average SS content of 9
mg/L. The above results show that water
quality during mid-flood tide was also generally good. Again, localised high SS levels and low DO
levels were found but these were found to be not due to project works. The instances of poor water quality at
several seawater intake stations were either due to adverse impacts from
outfalls located adjacent to the stations or local ambient conditions in the
area. As mentioned previously, large
quantities of silty discharges from outfalls near stations M4 to M6 have been
observed and documented on various occasions during the reporting month. A figure showing the location of various
outfalls along the seawall within the project area is shown in Annex C.
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 works undertaken during the reporting
month were related to site investigation works, demolition works and dredging
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.
No exceedances of noise quality attributable
to project works were observed during the reporting period. Although there were a few instances where
the Leq (30 minutes) was found to be above 75 dB(A), these levels were
investigated and found to be not due to project works. The noise levels above 75 dB(A) recorded on
2 May were due to a large public gathering outside City Hall.
The noise monitoring station situated at City
Hall is under the influence of a variety of noise sources in the area that
include helicopter traffic and vehicle movement at the drop off area in front
of City Hall. Pedestrian activity in
the area is another contributor of noise and tour groups also frequent the
site.
Based on investigations and analyses of water
quality monitoring results collected during the reporting month, it was found
that no exceedances of the Action and Limit Levels were attributable to the
project marine works. Although DO
levels below the Action Level were observed at seawater intake stations,
investigations found that they were due to natural variation or changes in
ambient conditions and not caused by the project marine works. It was
noted that during the reporting month, water quality at marine-based impact
monitoring stations (M8 and M10) was found to be similar to the control
stations.
The May 2004 monitoring results showed, on a
few occasions, elevated concentrations of SS were recorded above the Action
and/or Limit Level at seawater intake stations. Investigations into these monitoring results found that the SS
levels are likely attributed to discharge influences from outfalls located in
proximity of seawater intake monitoring stations. All of the higher SS concentrations recorded were shown to be
localised conditions as no increased SS levels were detected at the marine-based
impact stations and no unusual concentrations were measured at adjacent
monitoring stations during the same time.
High SS levels were often recorded at locations (stations M1 to M6) with
outfalls and stormwater culverts that discharge into the harbour. Baseline monitoring results showed similar
localised elevated concentrations of SS.
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 joint site inspection with
the IEC was conducted on 27 May 2004, and the IEC's site inspection report is
provided in Annex L.
During the site inspections conducted on 6
and 13 May 2004, slightly dark smoke emissions from a diesel generator were
observed and the Contractor was asked to check the plant. The Contractor was also reminded to
thoroughly cover any sandy stockpiles near Pier No. 7.
During the site inspection conducted on 20
May 2004, slight grey exhaust emission from a diesel generator was observed at
CR-12 and the Contractor was asked to check the plant. The Contractor was also asked to provide
clear signage for the wheel washing facilities at Pier No. 7 and CR-10. Additionally, the Contractor was asked to
enhance the prevention of muddy water from entering the gully during the
pre-boring works at Pier No. 7. It was
noted a silt removal system is used to remove suspended solids from the
wastewater before it is discharged.
Storm drains were also seen to be bunded by sand bags to prevent muddy
water from entering the drainage channel.
A faint oil sheen on top of a patch of
ponding water was seen at Pier No. 7 during the site inspection on 27 May
2004. The Contractor was advised to
clear the ponding water, which was immediately carried out. Also, a grease stain was found under a
diesel generator at CR-13 and the Contractor was asked to replace or repair the
generator and clean up the grease patch.
Two environmental complaints
regarding construction noise were received in May 2004. The first complaint, received by EPD on 5
May 2004, was with regard to noise generated from marine piling near Two
International Finance Centre (Two IFC).
Upon receipt of the complaint, the environmental complaint handling
procedures as stipulated in the EM&A Manual and the Environmental Site
Inspection Procedure Report were followed.
An investigation was conducted and on 19 May 2004, the ET and EPD
measured noise levels at the outside area, third floor of Two IFC during a
joint site inspection. Marine piling
works were being undertaken at the time and the recorded noise levels were
within the acceptable noise level.
Premier Management Services, on
behalf of Two IFC, lodged the second complaint addressed to TDD on 20 May
2004. The complaint was referred to the
ET and an investigation was carried in accordance with the environmental
complaint handling procedure. Based on
the findings of the investigation, it was found that the daytime construction
activities generating noise in the vicinity of Two IFC are: marine piling works
near Pier No. 7, drilling works for pre-bored H piles near Pier No. 7 and
superstructure works for Pier No. 7.
The predominate noise generating activities are the marine piling works,
which the Contractor has a valid Construction Noise Permit (CNP) for
undertaking these works. Additional
noise measurements were taken by the ET at the outside area, third floor of Two
IFC during the marine piling works. The
measured noise levels were within the acceptable noise level.
Based on the investigations of the
complaints, it was found that the noise generated from construction activities
are within the acceptable noise level and have been found to be compliant with
the CNP and Noise Control Ordinance (NCO).
No prosecution notices or summons
were received during the reporting period.
No environmental enquiries were received
during the reporting month.
The key issues to be considered in the coming
month include the following:
·
Remaining dredging works at IRAE;
·
Temporary installation of pre-cast caissons in
IRAW;
·
Marine piling and rock filling works;
·
Pre-bored H piles work for landside piling at the
Central Terminal Building (CTB);
·
Superstructure works at Pier No. 7;
·
Cooling watermains work at Lung Wui Road; and
·
Maintenance and necessary repairs to the seawater
intake silt screens.
The construction works scheduled in May 2004
include marine piling, temporary storage of pre-cast caissons and
superstructure works at Pier No. 7.
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
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 next 3 months is provided in the following table.
|
Date of Sampling |
Sampling Time |
|
|
2 June 2004 |
11:27 |
17:00 |
|
4 June 2004 |
08:00 |
13:30 |
|
7 June 2004 |
08:30 |
15:48 |
|
9 June 2004 |
10:21 |
17:00 |
|
11 June 2004 |
08:30 |
14:00 |
|
14 June 2004 |
10:31 |
16:54 |
|
16 June 2004 |
11:30 |
17:00 |
|
18 June 2004 |
12:00 |
17:30 |
|
21 June 2004 |
08:30 |
14:17 |
|
23 June 2004 |
08:30 |
15:38 |
|
25 June 2004 |
10:10 |
17:00 |
|
28 June 2004 |
08:44 |
15:07 |
|
30 June 2004 |
10:20 |
17:00 |
|
2 July 2004 |
12:00 |
17:30 |
|
5 July 2004 |
08:30 |
14:40 |
|
7 July 2004 |
09:13 |
16:11 |
|
9 July 2004 |
11:13 |
17:00 |
|
12 July 2004 |
09:27 |
15:59 |
|
14 July 2004 |
10:46 |
17:00 |
|
16 July 2004 |
11:53 |
17:00 |
|
19 July 2004 |
08:30 |
14:00 |
|
21 July 2004 |
08:30 |
14:46 |
|
23 July 2004 |
09:17 |
15:58 |
|
26 July 2004 |
08:30 |
14:00 |
|
28 July 2004 |
09:12 |
16:50 |
|
30 July 2004 |
11:02 |
17:00 |
|
2 August 2004 |
08:30 |
14:00 |
|
4 August 2004 |
08:30 |
14:55 |
|
6 August 2004 |
09:51 |
16:07 |
|
9 August 2004 |
08:30 |
14:38 |
|
11 August 2004 |
09:34 |
17:00 |
|
13 August 2004 |
10:53 |
17:00 |
|
16 August 2004 |
12:00 |
17:30 |
|
18 August 2004 |
08:30 |
14:38 |
|
20 August 2004 |
08:38 |
15:04 |
|
23 August 2004 |
11:56 |
17:00 |
|
25 August 2004 |
08:30 |
17:00 |
|
27 August 2004 |
10:03 |
17:00 |
|
30 August 2004 |
12:00 |
17:30 |
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,
no exceedances of environmental performance criteria were found to be caused by
the project works. The water quality
was found to be generally good, but a few localised elevated SS concentrations
and one low DO level has been recorded.
These levels were investigated and are attributed to either ambient
conditions or adverse influencing factors unrelated to project marine
works. It was found that discharges
from outfalls and stormwater culverts located near seawater intake monitoring
stations are major influencing factors that adversely impact water quality
within the works site area.
The marine-based impact
monitoring stations established to monitor the overall impact of the
reclamation activities on water quality in Victoria were shown to have similar
results as the control stations which are located outside the influence of
project works. As such, the water
quality monitoring results did not indicate that the marine works were
adversely affecting water quality outside the works boundary in Victoria
Harbour.
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.