1.
This is the 26th monthly Environmental Monitoring and Audit
(EM&A) Report prepared by Cinotech Consultants
Limited for the project
“Contract No. HY/2011/09 – Hong
Kong-Zhuhai-Macao Bridge Hong Kong Link Road – Section between HKSAR Boundary
and Scenic Hill” (hereinafter called the “Contract”). This report documents the findings of EM&A Works conducted in
March 2015.
Environmental Monitoring
and Audit Progress
2.
A summary of the monitoring activities in this reporting month is listed
in Table I below:
Table I Summary
Table for Monitoring Activities in the Reporting Month
Parameter(s) |
Date(s) |
1-hr TSP Monitoring |
5th, 11th, 17th,
23rd and 27th March 2015 |
24-hr TSP Monitoring |
5th, 11th, 17th,
23rd and 27th March 2015 |
Noise Monitoring |
6th, 12th, 18th and
24th March 2015 |
Water Quality Monitoring |
2nd, 4th, 6th, 9th,
11th, 13th, 17th, 19th, 21st,
23rd, 25th, 27th and 31st March
2015 |
19th and 27th March 2015 |
|
Additional Land-based
Dolphin Behaviour and Movement Monitoring |
9th and 13th March 2015 |
Environmental Site
Inspection |
3rd, 10th, 17th,
23rd and 31st March 2015 |
Archaeological Site
Inspection |
17th March 2015 |
Breaches of Action and Limit Levels
3.
Summary of the environmental exceedances of the reporting month is
tabulated in Table II.
Table II Summary
Table for Events Recorded in the Reporting Month
Environmental Monitoring |
Parameter |
No. of Exceedance |
No. of Exceedance related to the Construction Activities of this Contract |
||
Action
Level |
Limit
Level |
Action
Level |
Limit
Level |
||
Air Quality |
1-hr TSP |
0 |
0 |
0 |
0 |
24-hr TSP |
0 |
0 |
0 |
0 |
|
Noise |
Leq(30min) |
0 |
0 |
0 |
0 |
Water Quality |
Dissolved Oxygen (DO)
(Surface & Middle) |
0 |
0 |
0 |
0 |
Dissolved Oxygen (DO)
(Bottom) |
0 |
0 |
0 |
0 |
|
Turbidity |
0 |
0 |
0 |
0 |
|
Suspended Solids (SS) |
6 |
5 |
0 |
0 |
1-hour
TSP Monitoring
4.
All 1-hour TSP monitoring was conducted as scheduled in the reporting month. No Action/Limit Level exceedance was
recorded.
24-hour
TSP Monitoring
5.
All 24-hour TSP monitoring was conducted as scheduled in the reporting month. No Action/Limit Level exceedance was
recorded.
Construction
Noise
6.
All construction noise monitoring was conducted as scheduled in the
reporting month. No Action/Limit Level exceedance was recorded.
Water Quality
7.
All water quality monitoring was conducted as scheduled in the reporting
month. There are six Action Level and five Limit Level exceedances for suspended
solids were recorded. No Action/Limit Level exceedance for dissolved oxygen and
turbidity were recorded.
8.
According to the investigation, the exceedances are considered not due
to the Contract due to the following reasons:
1)
Installation
work at Pile Cap was carried at near the monitoring stations in which
exceedances were recorded. Water quality impact due to this work is not
anticipated;
2)
No pollution discharge was observed from the site;
3)
Sediment plume due to natural fluctuation of shallow water was
observed but no vessels were observed near the plumes;
4)
Dispersion of sediment plume to the monitoring
stations from the area outside the site boundary (i.e. works area not
under and related to HY/2011/09) was observed; and
5)
No site activity was carried at near the monitoring stations in which
exceedances were recorded.
Complaint Log
9.
No environmental complaints were received in the reporting month.
Notification of
Summons and Successful Prosecutions
10.
No notification of summons and successful prosecution was received in
the reporting month.
11.
This report has been developed in compliance with the reporting
requirements for the subsequent monthly EM&A Report as required by the
EM&A Manual for Hong Kong Link Road (EM&A Manual).
12.
Major site activities for
the coming reporting month will include:
WA4
Fabrication of rebar cages
Fabrication of temporary piling platforms
WA7
Fabrication of rebar cages
Loading and Unloading of rebar materials
Marine
Viaduct (P0 to P80)
Reverse
Circulation Drill (RCD) Method:
Piling works
Mooring bits and silt curtain installation
Installation of piling jackets
Dismantling of piling jackets
Pile excavation and casing installation
Inter-face tests, full depth coring test
and sonic test
Grouting works
Kelly
Method:
Removal of piling platform and temporary
pile extraction
Inter-face tests, full depth coring
test and sonic test
Toe grouting works
Pile
Cap Construction:
Installation of precast cap shells
Concreting
Kingpost installation and associated steel
welding works
Concreting trimming
Works
with Cofferdam:
Installation of waling strut
Installation of sheet pile
Installation of temporary working platform
Installation of shear pin
Installation of bored pile casing
Excavation works and casting of concrete
plug
Dewatering works and sealing works
Additional welding
Column
Construction:
Lifting works
Lift concreting
Pier head works
Pier head concreting
Column insert installation, mobilization
and temporary works
Deck
Erection:
Segment Unloading Frame (SUF)
Winches test
Assembly and erection of Lifting Frame 2
Erection of segment on pier
Land
Viaduct (P85 to Abutment at SHT) & Marine Viaduct (P81 - P84)
Pile construction
Pouring of column
Pre-bored for sheet pile for cofferdam
construction
Seawall block coring and breaking
Formwork erection
Blinding concrete for scaffolding works
Dismantling of steel bracket system
Erection of steel bracket system cross
road steel portal beams erection and corresponding falsework
erection
Steel girders and cross beams erection