Table of Content
1.3 Construction Works undertaken during the Reporting Month
1.4 Summary of EM&A Requirements
2.4 Monitoring Parameters, Frequency and Duration
2.5 Monitoring Procedures and Calibration Details
3.4 Monitoring Parameters, Frequency and Duration
3.5 Monitoring Procedures and Calibration Details
4.1 Review of Environmental Monitoring Procedures
4.2 Assessment of Environmental Monitoring Results
4.4 Status of Environmental Licensing and Permitting
4.5 Implementation Status of Environmental Mitigation Measures
4.6 Implementation Status of Event/Action Plans
4.7 Implementation Status of Environmental Complaint Handling Procedures
5.1 Status of Natural Gas supply
5.2 Key Issues for the Coming Month
5.3 Monitoring Schedules for the Next 3 Months
5.4 Construction Program for the Next 3 Months
List of Tables
Table 1.1 Construction Activities and Their Corresponding Environmental Mitigation Measures
Table 2.1 Air Quality Monitoring Locations
Table 2.2 Air Quality Monitoring Equipment
Table 2.3 Air Quality Monitoring Parameter, Duration and Frequency
Table 3.1 Noise Monitoring Locations
Table 3.2 Noise Monitoring Equipment
Table 3.3 Noise Monitoring Duration and Parameter
Table 4.1 Summary of AL Level Exceedances on Monitoring Parameters
Table 4.2 Estimated Amounts of Waste Generated in March 2006
Table 4.3 Summary of Environmental Licensing and Permit Status
Table 4.4 Environmental Complaints / Enquiries Received in March 2006
Table 4.5 Outstanding Environmental Complaints / Enquiries Carried Over
List of figures
Figure
1.1 Layout
of Work Site
Figure
1.2 Cable
Route of Transmission System
Figure
1.3 Location
of Dumping Area (South Cheung Chau Spoil Disposal Area)
Figure
2.1 Location
of Air Quality Monitoring Stations
Figure
3.1 Location
of Noise Monitoring Stations
Figure
3.2 Location
of Manual Noise Monitoring
Appendices
Appendix B Action and Limit Levels for Air Quality and Noise
Appendix C Environmental
Monitoring Schedule
Appendix D Air
Quality Monitoring Results for March 2006
Appendix E Noise
Monitoring Results for March 2006
Appendix F The
QA/QC Procedures and Results
Appendix J Tentative
Construction Programme
This is the sixtieth monthly Environmental Monitoring and Audit (EM&A)
report for the Project “Construction of Lamma Power Station Extension” prepared
by the Environmental Team (ET).
This report presents the results of impact monitoring on air quality and noise for the said project in March
2006.
After successful completion of post-project
monitoring in September 2002, no further marine water quality monitoring for
the reclamation works would be required.
Air and noise monitoring were performed. The results were checked
against the established
Action/Limit (AL) levels.
An on-site audit was conducted once per week. The implementation status of the environmental
mitigation measures, Event/Action
Plan and environmental complaint handling procedures were also checked.
A separate
monthly EM&A report for submarine pipeline prepared by the consultant, as
one of ET members, is shown
in Appendix K.
Construction
Activities Undertaken
Construction
activities for Lamma Extension during the reporting month are tabulated as
follows:
Item |
Construction
Activities |
Unit L9 Civil and Building Works |
Main Station Building, 275kV Switching Station
Building, Shunt
Reactor, Chimney, Drainage
& Road,
Fire Services Water Tank and Fire
Pump House, C.W. Culvert System &
Equipment Room, C.W. Pump Equipment Room, Gas Receiving Station, Pipe & Cable
Rack and Lamma Power Station Addition and Alteration (LPS A&A) Works |
Unit L9 Mechanical Erection |
Erection of HRSG, Steam Turbine, Gas Turbine,
Generator, Condenser, Aux Equipment, Air duct / Inlet Filter, HRSG Inlet Duct
and Piping Support / Piping Erection; Insulation Work; and Installation of
Platform, Pipe Rack, Intake Aux Equipment, Bop piping and GRS piping |
Unit L9 Electrical, Instrumentation & Control
Erection |
Cable Tray & Earthing Installation, Conduit & Instrument Piping
Installation and Cable Laying &
Termination |
Transmission System |
Backfilling
above portal structure for Cable Duct 2, installation
of submarine cables between N2 & N4 and backfilling & cable protection |
Gas Pipeline |
Please refer to Appendix K |
Miscellaneous |
Slurry ash
piping & filling |
Environmental
Monitoring Works
One (1) dust monitoring work was re-scheduled in the reporting
month as shown in the following table:
Monitoring work |
Monitoring Location |
Original Schedule |
Makeup Sampling |
Reasons |
24 hour TSP sampling |
AM1 |
15/03/2006 |
17/03/2006 |
Failure of TSP sampler. |
Apart from
the above incident, all monitoring work
at designated stations was performed as scheduled satisfactorily.
Air Quality
No exceedance
of Action/Limit levels on 1-hour TSP and 24-hour TSP for air quality was recorded in the month.
Noise
Construction work for Lamma Extension was carried out during the
restricted hours including evening-time, holidays and night-time
under valid Construction Noise Permits.
No exceedance
of Action and Limit levels for noise arising from
the construction of Lamma Extension and transmission system was recorded
in the month.
Site Environmental Audit
Independent Environmental
Checker (IEC) conducted a site inspection on 15/03/2006. The inspection result is attached in Appendix H.
Site audits
were carried out on a weekly basis to monitor environmental issues on the construction site. The site conditions were generally
satisfactory. All required
mitigation measures were implemented.
Environmental Licensing and Permitting
Description |
Permit No. |
Valid Period |
Issued To |
Date of Issuance |
|
From |
To |
||||
Varied Environmental Permit |
EP-071/2000/C |
18/05/05 |
- |
HEC |
18/05/05 |
Construction Noise Permit |
GW-RS0584-05 |
20/09/05 |
19/03/06 |
Contractor |
15/09/05 |
Construction Noise Permit |
GW-RS0585-05 |
17/09/05 |
16/03/06 |
Contractor |
15/09/05 |
Construction Noise Permit |
GW-RS0784-05 |
29/11/05 |
19/05/06 |
Contractor |
29/11/05 |
Construction Noise Permit |
GW-RS0719-05 |
01/12/05 |
31/05/06 |
Contractor |
09/11/05 |
Construction Noise Permit |
GW-RE0363-05 |
01/01/06 |
31/05/06 |
Contractor |
24/11/05 |
Construction Noise Permit |
GW-RS0008-06 |
24/01/06 |
30/06/06 |
Contractor |
20/01/06 |
Construction Noise Permit |
GW-RS0032-06 |
11/02/06 |
10/08/06 |
Contractor |
27/01/06 |
Construction Noise Permit |
GW-RS0138-06 |
24/03/06 |
21/09/06 |
Contractor |
24/03/06 |
Construction Noise Permit |
GW-RS0154-06 |
04/04/06 |
30/06/06 |
Contractor |
31/03/06 |
Dumping Permit |
EP/MD/06-031 |
05/09/05 |
04/03/06 |
Contractor |
02/09/05 |
Dumping Permit |
EP/MD/06-032 |
05/09/05 |
04/03/06 |
Contractor |
02/09/05 |
Registration
of Chemical Waste Producer |
WPN5213-912-P2781-07 |
11/06/04 |
- |
Contractor |
11/06/04 |
Registration
of Chemical Waste Producer |
WPN5213-912-K2801-03 |
15/09/04 |
- |
Contractor |
15/09/04 |
Registration
of Chemical Waste Producer |
WPN5517-912-T2007-02 |
17/03/05 |
- |
Contractor |
17/03/05 |
Registration
of Chemical Waste Producer |
WPN5213-912-W2852-09 |
25/01/05 |
- |
Contractor |
25/01/05 |
Registration
of Chemical Waste Producer |
WPN4111-912-M2534-09 |
20/06/05 |
- |
Contractor |
20/06/05 |
WPCO
Discharge Licence |
EP890/W2/XD020 |
22/11/04 |
30/11/09 |
Contractor |
22/11/04 |
WPCO
Discharge Licence |
EP890/W2/XD021 |
03/02/05 |
28/02/10 |
Contractor |
03/02/05 |
Implementation
Status of Environmental Mitigation Measures
Environmental
mitigation measures for the construction activities
as recommended
in the EM&A manual were implemented in the reporting month.
Environmental
Complaints
One follow-up enquiry from EPD about the February case was received in
the reporting month and EPD
was replied accordingly. Besides
this, no complaint against the construction activities was received.
Future Key
Issues
The future key issues to be
considered in the coming month are as follows:
Unit L9 Civil and Building
Works
-
to continue monitoring the noise level during construction and to
ensure compliance with the CNP’s already obtained;
-
to continue executing the preventive measures for avoiding noise
exceedance and keep monitoring/ reviewing the performance;
-
to monitor and review the
sufficiency of the dust suppression measures provided and increase the
resources accordingly if necessary;
Unit L9 Mechanical Erection
-
to continue monitoring the noise level during construction
-
to continue executing the preventive measures for avoiding noise
exceedance and keep monitoring/ reviewing the performance;
-
to monitor and review the
sufficiency of the dust suppression measures provided and increase the
resources accordingly if necessary;
Unit L9 Electrical Erection
-
to continue monitoring the noise level during construction
-
to continue executing the preventive measures for avoiding noise
exceedance and keep monitoring/ reviewing the performance;
-
to monitor and review the
sufficiency of the dust suppression measures provided and increase the
resources accordingly if necessary;
Transmission System
-
to continue monitoring the noise level during construction;
-
to continue executing the
preventive measures for avoiding noise exceedance and keep monitoring/
reviewing the performance;
-
to monitor and review the
sufficiency of the dust suppression measures provided and increase the
resources accordingly if necessary;
-
to closely monitor the
construction activities in order to avoid disturbance to the rare plants;
-
to provide temporary fire fighting
equipment for prevention of fire within the work sites.
Concluding Remarks
The environmental performance of the project was
generally satisfactory.
The Environmental Team (hereinafter called the “ET”) was formed within the Hongkong Electric Co. Ltd (HEC) to undertake Environmental Monitoring and Audit for “Construction of Lamma Power Station Extension” (hereinafter called the “Project”). Under the requirements of Section 6 of Environmental Permit EP-071/2000/C, an EM&A programme for impact environmental monitoring set out in the EM&A Manual (Construction Phase) is required to be implemented. In accordance with the EM&A Manual, environmental monitoring of air quality, noise and water quality and regular environmental audits are required for the Project. As the post-project marine water monitoring was successfully completed in September 2002, no further water quality monitoring for the reclamation works would be required.
The Project
involves the construction of a gas-fired power station employing combined
cycled gas turbine technology, forming an extension to the existing Lamma Power
Station. The key elements of the
Project including the construction activities associated with the transmission
system and submarine gas pipeline are outlined as follows.
· dredging and reclamation to form approximately 22 hectares of usable area;
· construction of six 300MW class gas-fired combined cycle units;
· construction of a gas receiving station;
· construction of a new transmission system linking the Lamma Extension to load centres on Hong Kong Island;
· laying of a gas pipeline for the supply of natural gas to the new power station
This report summarizes the environmental monitoring and audit work for
the Project for the month of
2006.
An Environmental Management Committee
(EMC) has been set up in HEC to oversee the Project. The management structure includes the following:
· Environmental Protection Department (The Authority);
· Environmental Manager (The Chairman of the Environmental Management Committee);
· Engineer;
· Independent Environmental Checker (IEC);
· Environmental Team (ET);
· Contractor.
The project organisation chart for the construction EM&A programme is shown in Appendix A.
1.3
Construction Works undertaken during the Reporting
Month
Construction activities for Unit L9 civil and building works were for the Main Station Building, 275kV Switching Station Building, Shunt Reactor, Chimney, Drainage & Road, Fire Services Water Tank and Fire Pump House, C.W. Culvert System & Equipment Room, C.W. Pump Equipment Room, Gas Receiving Station, Pipe & Cable Rack and LPS A&A Works. Construction activities for Unit L9 mechanical works were the erection of HRSG, Steam Turbine, Gas Turbine, Generator, Condenser, Auxiliary Equipment, Air duct / Inlet Filter, HRSG Inlet Duct, Piping Support / Piping, Insulation Work, and installation of Platform, Pipe Rack, Intake Auxiliary Equipment, Bop piping and GRS piping. Construction activities for Unit L9 electrical, instrumentation & control erection were Cable Tray & Earthing installation, Conduit & Instrument Piping Installation and Cable Laying & Termination. Construction activities for Unit L9’s associated transmission system were backfilling above portal structure for Cable Duct 2, installation of submarine cables between N2 & N4 and backfilling & cable protection. A separate monthly EM&A report for submarine pipeline prepared by the consultant, as one of ET members, is shown in Appendix K. Layout plans for construction site and transmission system are shown in Figure 1.1 and Figure 1.2 respectively. Uncontaminated materials were dumped at the assigned location within the South Cheung Chau Spoil Disposal Area. Figure 1.3 and shows the dumping location in March 2006.
The main construction activities carried out during the reporting month and the corresponding environmental mitigation measures are summarized in Table 1.1. The implementation of major mitigation measures in the month is provided in Appendix I.
Table 1.1 Construction Activities and Their Corresponding Environmental Mitigation Measures
Item |
Construction Activities |
Environmental Mitigation Measures |
Unit L9 Civil and Building Works |
||
1. |
Main
Station Building |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
2. |
275kV
Switching Station Building |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
3. |
Shunt
Reactor |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
4. |
Chimney |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
5. |
Drainage
& Road Works |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
6. |
Fire Services Water Tank and Fire Pump House |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
7. |
C.W.
Culvert System & Equipment Room |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all work
sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
8. |
C.W. Pump
Equipment Room |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
9. |
Gas Receiving Station |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all work
sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
10. |
Pipe
& Cable Rack |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all work
sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
11. |
LPS
A&A Works |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all work
sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
Construction of
Transmission System
|
||
12. |
Backfilling above portal structure for Cable Duct 2 |
Terrestrial Ecology
- Special care and close monitoring to avoid disturbances to the rare plant species. -
Temporary fire fighting equipment provided within the
work area during construction. |
13. |
Installation
of Submarine Cables between N2 & N4 |
Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. |
14. |
Backfilling & Cable Protection |
Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. |
Unit L9
Mechanical Erection
|
||
15. |
HRSG
Erection |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
16. |
Steam
Turbine Erection |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
17. |
Gas Turbine
Erection |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
18. |
Generator
Erection |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
19. |
Condenser
Erection |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
20. |
Auxiliary
Equipment Erection |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
21. |
Air duct /
Inlet Filter |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
22. |
HRSG Inlet
Duct |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
23. |
Piping
Support / Piping Erection |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all work
sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
24. |
Insulation
Work |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all work
sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
25. |
Platform
Installation |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all work
sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
26. |
Pipe Rack
Installation |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all work
sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
27. |
Intake Aux
Equipment Installation |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
28. |
Bop piping
installation |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
29. |
GRS piping
installation |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
Unit L9
Electrical, Instrumentation & Control Erection
|
||
30. |
Cable Tray & Earthing Installation |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
31. |
Conduit
& Instrument Piping Installation |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
32. |
Cable Laying & Termination |
Air
-
Dust suppression measures implemented. Noise
-
General noise mitigation measures employed at all
work sites throughout the construction phase. Waste
Management -
Waste Management Plan submitted and implemented. |
Miscellaneous |
||
33. |
Slurry
ash piping & filling |
Noise
- General noise mitigation measures implemented and silent type equipment deployed. |
1.4 Summary of EM&A Requirements
The EM&A
program requires environmental monitoring for air, noise
and water quality. As the post-project marine water monitoring was successfully
completed in September 2002, no further water quality monitoring for the
reclamation works would be required. The detailed EM&A
monitoring work for air quality and noise are
described in Sections
2 and 3 respectively. Regular environmental site audits
for air quality, noise, water quality and waste management
were carried out.
The following environmental audits are
summarized in Section 4 of this report:
· Environmental monitoring results;
· Waste Management Records;
· Weekly site audit results;
· The status of environmental licensing and permits for the Project;
· The implementation status of environmental protection and pollution control/ mitigation measures.
Future key issues will be reported in Section 5 of this report.
1-hour and 24-hour TSP monitoring at agreed frequencies were conducted to monitor air
quality. The impact
monitoring data were checked against the Action/Limit Levels as determined in the Baseline
Monitoring Report (Construction Phase). Appendix B shows
the established Action/Limit Levels for Air Quality.
Three dust
monitoring locations were selected for 1-hour TSP sampling (AM1, AM2 & AM3)
while four monitoring locations were selected for 24-hour TSP sampling (AM1,
AM2, AM3 and AM4). Table
2.1 tabulates the monitoring stations. The locations of the monitoring stations are shown in Figure 2.1.
Table 2.1 Air Quality Monitoring Locations
Location I.D. |
Description |
AM1 |
Reservoir |
AM2 |
East Gate |
AM3 |
Ash Lagoon |
AM4 |
Tai Yuen Village |
Continuous
24-hour TSP air quality monitoring was performed using the GS2310 High Volume
Air Samplers (HVAS), Partisol Model 2000 Sampler and the MINIVOL Portable
Sampler at AM1&2, AM3 and AM4 respectively. TEOM Model 1400a continuous dust monitors were used to carry
out 1-hour TSP monitoring at AM1, AM2 and AM3. Table 2.2 summarises the equipment used
in dust monitoring.
Table 2.2 Air Quality Monitoring Equipment
Equipment |
Model and Make |
24-hour
sampling: HVAS
Sampler Partisol
Air Sampler MINIVOL
Portable Sampler 1-hour
sampling: Continuous
TSP Dust Meter |
Model GS2310 Anderson Instruments Inc. Partisol Model 2000 Rupprecht & Patashnick AIRMETRICS TEOM Model 1400a Rupprecht & Patashnick |
2.4
Monitoring
Parameters, Frequency and Duration
Table 2.3 summarises the monitoring parameters, duration and
frequency of air quality monitoring.
The monitoring schedule for the reporting month is shown in Appendix C.
Table 2.3 Air Quality Monitoring Parameter,
Duration and Frequency
Monitoring Stations |
Parameter |
Duration |
Frequency |
AM1 |
1-hour TSP |
1 |
3 hourly samples every 6
days |
24-hour TSP |
24 |
Once every 6 days |
|
AM2 |
1-hour TSP |
1 |
3 hourly samples every 6
days |
24-hour TSP |
24 |
Once every 6 days |
|
AM3 |
1-hour TSP |
1 |
3 hourly samples every 6
days |
24-hour TSP |
24 |
Once every 6 days |
|
AM4 |
24-hour TSP |
24 |
Once every 6 days |
2.5
Monitoring Procedures and Calibration Details
24- hour TSP Monitor:
Preparation of
Filter Papers
· Visual inspection of filter papers was carried out to ensure that there were no pinholes, tears and creases;
· The filter papers were then labeled before sampling.
· The filter papers were equilibrated at room temperature and relative humidity < 50% for at least 24 hours before weighing.
Field Monitoring
· During collection of the sampled filter paper, the information on the elapse timer was logged. Site observations around the monitoring stations, which might have affected the monitoring results, were also recorded. Major pollution sources, if any, would be identified and reported. The flow record chart for the previous sampling was checked to see if there was any abnormality.
· The post-sampling filter papers were removed carefully from the filter holder and folded to avoid loss of fibres or dust particles from the filter papers;
· The filter holder and its surrounding were cleaned;
· A pre-weighed blank filter paper for the next sampling was put in place and aligned carefully. The filter holder was then tightened firmly to avoid leakage;
· A new flow record chart was loaded into the flow recorder;
· The programmable timer was set for the next 24 hrs sampling period, ! 1/2 hr;
· The post-sampling filter papers were equilibrated at room temperature and relative humidity < 50% for at least 24 hours before weighing.
1- hour TSP Monitor:
· The following parameters of the TEOM model dust meters are regularly checked to ensure proper functionality:
o Mass concentration;
o Total mass;
o Frequency of the tapered element;
o Electrical noise;
o Main flow;
o Auxiliary flow.
Maintenance
& Calibration
· The monitoring equipment and their accessories are maintained in good working conditions.
· Monitoring equipment is calibrated at monthly intervals. Calibration details are shown in Appendix F.
One (1)
dust monitoring event was re-scheduled in the reporting month as shown in the
following table:
Monitoring work |
Monitoring Location |
Original Schedule |
Makeup Sampling |
Reasons |
24 hour TSP sampling |
AM1 |
15/03/2006 |
17/03/2006 |
Failure of TSP sampler. |
Apart
from the above incident, all dust monitoring works were conducted on
schedule. All monitoring data and
graphical presentation of the monitoring results are provided in Appendix D.
Key findings and observations are provided below:
1-hour TSP
No
exceedance of 1-hour TSP Action/Limit Level was recorded in the month.
24-hour TSP
No exceedance of 24-hour TSP Action/Limit Level
was recorded in the month.
Continuous noise alarm monitoring at Ash Lagoon/Ching Lam were carried out to calculate the noise contributed by the construction activities at the two critical NSR’s, viz. Long Tsai Tsuen/Hung Shing Ye and the school within the village of Tai Wan San Tsuen. The impact monitoring data for construction noise were checked against the limit levels specified in the EM&A Manual. With the availability of the construction noise permits, impact monitoring for the construction work during the restricted hours was also carried out. Section 4 presents the details of the construction noise permits.
Manual noise measurements at Pak Kok Tsui residences were carried out for the construction work
of Transmission System in this reporting month. The impact noise monitoring data were checked against the limit
levels specified in the EM&A Manual. Appendix B shows the established Action/Limit Levels
for noise.
In accordance with the EM&A manual, the identified noise monitoring locations are listed in Table 3.1 and shown in Figure 3.1 and Figure 3.2.
Table
3.1 Noise Monitoring
Locations
Purpose of noise monitoring |
Monitoring Location |
Lamma Extension |
Ash Lagoon |
Lamma Extension |
Ching Lam |
Transmission System |
Pak Kok Tsui residences (No.2 and No.8) |
The sound level meters used for noise monitoring complied with International Electrotechnical Commission Publications 651:1979 (Type 1) and 804:1985 (Type 1). The noise monitoring equipment used is shown in Table 3.2.
Table 3.2 Noise Monitoring Equipment
Equipment |
Model |
|
Lamma Extension |
Transmission System |
|
Sound level meter |
Rion NA-27/ B&K
2238F |
Rion NL-31 |
Sound level calibrator |
Rion NC-74 |
Rion NC-74 |
3.4 Monitoring Parameters, Frequency and Duration
Continuous alarm monitoring of A-weighted Leq levels was
carried out at Ash Lagoon and Ching Lam while manual noise monitoring was conducted
at Pak Kok Tsui residences. The measurement duration and parameter of noise monitoring were
presented in Table 3.3 as follows:
Table 3.3 Noise Monitoring Duration and
Parameter
Location |
Time Period |
Frequency |
Parameter |
Ash Lagoon Ching Lam |
Daytime: 0700-1900
hrs on normal weekdays Evening-time
& holidays: 0700-2300 hrs on holidays; and 1900-2300 hrs on all other days Night-time: 2300-0700 hrs of next
day |
Daytime: 30 minutes Evening-time
& holidays: 5 minutes Night-time: 5 minutes |
30-min
LAeq 5-min
LAeq 5-min
LAeq |
Pak Kok Tsui
residences |
0700-1900
hrs on normal weekdays |
Twice per week |
30-min
LAeq |
3.5
Monitoring Procedures and
Calibration Details
Monitoring Procedures
Continuous Noise Monitoring for Lamma Extension
Construction
The measured noise
levels (MNL's) were collected at the noise alarm monitoring
stations at Ash Lagoon and Ching Lam. The notional
background noise levels (viz. baseline noise data at Ash
Lagoon and Ching Lam) were applied to correct the
corresponding MNL's in
30-min/5-min LAeq.
A wind speed sensor was installed at Station Building Rooftop. The wind speed signal was used to determine whether the data from Ash Lagoon and Ching Lam noise alarm monitoring stations were affected. The instantaneous data was discarded in case the instantaneous wind speed exceeded 10 m/s. The 30-min/5-min LAeq was considered valid only if the amount of valid data was equal to or above 70%.
When
calibrating the noise measuring equipment, all
observations around the monitoring stations, which might have affected
the monitoring results, were recorded.
Manual Noise Monitoring for Transmission System
Construction
Manual noise measurements were carried out at the Pak Kok Tsui residences in accordance with standard acoustical principles and practices for checking the impact of noise related to construction of the Transmission System.
Hand‑held
anemometer was used to measure the wind speed while taking noise
measurements. If the wind speed is
excessive, noise data will be discarded and re-measured.
Equipment Calibration
The sound level meters and calibrators have been verified by the manufacturer or accredited laboratory. Equipment for continuous noise monitoring was calibrated at site on a monthly basis.
The sound level meters used for manual noise
measurement were calibrated
with a sound level calibrator immediately before and after noise measurement in
accordance with the relevant Technical Memoranda under the Noise Control
Ordinance. Calibration details are shown in Appendix F.
Continuous noise monitoring was conducted at the two monitoring stations at Ash Lagoon and Ching Lam while manual noise monitoring was carried out at the Pak Kok Tsui residences.
All monitoring results and their graphical presentations
are provided in Appendix E. No exceedance of noise Action/Limit
Level was recorded in the month.
4.1
Review of Environmental Monitoring Procedures
The environmental
monitoring procedures were regularly reviewed by the Environmental Team. No modification to the existing monitoring procedures was recommended.
4.2
Assessment
of Environmental Monitoring Results
Monitoring results for Air Quality and Noise
The environmental monitoring results for Air Quality and Noise in the reporting month presented in sections 2, 3 and 4 respectively are summarized in Table 4.1.
Table 4.1 Summary of AL Level Exceedances on Monitoring
Parameters
Item |
Parameter
Monitored |
Monitoring
Period |
No. of Exceedances In |
Event/Action
Plan Implementation Status and Results |
||
Action
Level |
Limit Level |
|||||
Air |
||||||
1 |
Ambient TSP (24-hour) |
01/03/06- 31/03/06 |
0 |
0 |
|
|
2 |
Ambient TSP (1-hour) |
01/03/06- 31/03/06 |
0 |
0 |
|
|
Noise |
||||||
1 |
Noise level at the critical NSR’s predicted by the noise alarm monitoring system |
01/03/06- 31/03/06 |
0 |
0 |
|
|
2 |
Manual noise monitoring at the Pak Kok Tsui residences |
01/03/06- 31/03/06 |
0 |
0 |
|
|
Waste Management
Records
The estimated amounts of different types of waste
generated in March 2006 are shown in Table 4.2.
Table
4.2 Estimated Amounts of Waste
Generated in March 2006
Waste Type |
Examples |
Estimated
Amount |
Construction Waste |
Concrete Waste, Used formwork, reinforcement and wooden waste |
3 Tonne |
137 m3 |
||
General Refuse |
Domestic wastes collected on site |
25 m3 |
IEC conducted a site inspection on 15/03/2006. The inspection result is attached in Appendix H.
Site audits were
carried out by ET on a weekly basis to monitor environmental issues at the construction sites to
ensure that all mitigation measures were implemented timely and properly. The site
conditions were generally satisfactory.
All required mitigation measures were implemented. The weekly site
inspection results are
attached in Appendix H.
4.4 Status of Environmental Licensing and Permitting
All permits/licenses obtained
for the project are summarised in Table 4.3.
Table 4.3 Summary of Environmental Licensing and Permit Status
Description |
Permit No. |
Valid Period |
Highlights |
Status |
|
From |
To |
||||
Varied Environmental Permit |
EP-071/2000/C |
18/05/05 |
- |
The whole construction work site |
Valid |
Construction Noise Permit |
GW-RS0584-05 |
20/09/05 |
19/03/06 |
Operation of PME’s allowed during the restricted hours (any day between 2300-0700 hrs on next day). |
Valid |
Construction Noise Permit |
GW-RS0585-05 |
17/09/05 |
16/03/06 |
Operation of PME’s allowed during the restricted hours (general holidays including Sundays between 0700-2300 hrs
and any day not being a general holiday between 1900-2300 hrs). |
Valid |
Construction Noise Permit |
GW-RS0784-05 |
29/11/05 |
19/05/06 |
Operation of PME’s allowed during the restricted hours (general holidays including Sundays between 0700-1900 hrs
and any day not being a general holiday between 1900-2100 hrs). |
Valid |
Construction Noise Permit |
GW-RS0719-05 |
01/12/05 |
31/05/06 |
Operation of PME’s allowed during the restricted hours (general holidays including Sundays between 0700-0700 hrs
on next day and any day not being a holiday between 1900-0700 hrs on next
day). |
Valid |
Construction Noise Permit |
GW-RE0363-05 |
01/01/06 |
31/05/06 |
Operation of PME’s allowed during the restricted hours (general holidays including Sundays between 0700-0700 hrs
on next day and any day not being a general holiday between 1900-0700 hrs on
next day). |
Valid |
Construction Noise Permit |
GW-RS0008-06 |
24/01/06 |
30/06/06 |
Operation of PME’s allowed during the restricted hours (general holidays including Sundays between 0700-2300 hrs
and any day not being a general holiday between 1900-2300 hrs). |
Valid |
Construction Noise Permit |
GW-RS0032-06 |
11/02/06 |
10/08/06 |
Operation of PME’s allowed during the restricted hours (general holidays including Sundays between 0700-0700 hrs
on next day and any day not being a general holiday between 1900-0700 hrs on
next day). |
Valid |
Construction Noise Permit |
GW-RS0138-06 |
24/03/06 |
21/09/06 |
Operation of PME’s allowed during the restricted hours (general holidays including Sundays between 0700-0700 hrs
on next day and any day not being a general holiday between 1900-0700 hrs on next
day). |
Valid |
Construction Noise Permit |
GW-RS0154-06 |
04/04/06 |
30/06/06 |
Operation of PME’s allowed during the restricted hours (general holidays including Sundays between 0700-2300 hrs and
any day not being a general holiday between 1900-2300 hrs). |
Valid |
Dumping Permit |
EP/MD/05-031 |
05/09/05 |
04/03/06 |
Dumping at South Cheung Chau Disposal Area;
Supply and Installation of Submarine and Land Cables |
Valid |
Dumping Permit |
EP/MD/05-032 |
05/09/05 |
04/03/06 |
Dumping at South Cheung Chau Disposal Area;
Supply and Installation of Submarine and Land Cables |
Valid |
Registration
of Chemical Waste Producer |
WPN5213-912-P2781-07 |
11/06/04 |
- |
Major Chemical Waste
Type: Spent lubrication oil, waste car battery, paint or thinner contaminated
container |
Valid |
Registration
of Chemical Waste Producer |
WPN5213-912-K2801-03 |
15/09/04 |
- |
Major Chemical Waste
Type: Spent lubricating oil, spent battery, contaminated soil with spent
flammable liquid |
Valid |
Registration
of Chemical Waste Producer |
WPN5517-912-T2007-02 |
17/03/05 |
- |
Major Chemical Waste Type
for the construction work: asbestos
waste, spent lubricating lubrication oil |
Valid |
Registration
of Chemical Waste Producer |
WPN5213-912-W2852-09 |
25/01/05 |
- |
Major Chemical Waste
Type: spent mineral oil/ lubricating oil, spent solvents, spent batteries and
surplus paint |
Valid |
Registration of
Chemical Waste Producer |
WPN4111-912-M2534-09 |
20/06/05 |
- |
Major Chemical Waste
Type: spent insulation oil for transformer |
Valid |
WPCO
Discharge Licence |
EP890/W2/XD020 |
22/11/04 |
30/11/09 |
Toilet for LMX
construction site |
Valid |
WPCO
Discharge Licence |
EP890/W2/XD021 |
03/02/05 |
28/02/10 |
Toilet for LMX
construction site |
Valid |
4.5
Implementation Status of Environmental Mitigation
Measures
Mitigation measures detailed in the permits and the EM&A Manual (Construction
Phase) are required to be implemented. An updated summary of the Environmental Mitigation Implementation Schedule (EMIS) is
presented in Appendix I.
4.6 Implementation Status of Event/Action Plans
The Event/Action Plans extracted from the EM&A Manual (Construction Phase) are presented in Appendix G.
4.7 Implementation Status of Environmental Complaint Handling Procedures
In March 2006, one follow-up enquiry from EPD about the February case was received as mentioned in Table 4.5. Besides this, no complaint against the construction activities was received.
Table 4.4 Environmental
Complaints / Enquiries Received in March 2006
Case Reference / Date, Time Received / Date, Time Concerned |
Descriptions /Actions Taken |
Conclusion / Status |
Nil |
N/A |
N/A |
Table 4.5 Outstanding Environmental
Complaints / Enquiries Carried Over
Case Reference / Date, Time Received / Date, Time Concerned |
Descriptions /Actions Taken |
Conclusion / Status |
Reference: PD20060005 Received: 20/02/2006 Concerned: 17/02/2006 |
On 17/02/2006, EPD found the contractor of
HEC’s site at Cyberport Landing Point operating a generator beyond 19:00
without a CNP. EPD then
requested HEC for details of the contractor and the work. Actually, the work was an emergency
repair of a newly installed 275kV fluid-filled
cable joint to avoid ingress of air to the cable which would
have detrimental effect on the cable insulation. HEC has explained the incident to EPD
by letter dated 22/02/2006 accordingly. In response to EPD’s further enquiry on
25/03/2006, another letter was issued to EPD by HEC on 06/04/2006 to explain
the contractor’s decision of carrying out the emergency work. |
The incident was
related to an emergency work and EPD was replied accordingly. Pending EPD’s
further advice, if any. |
5.1
Status
of Natural Gas supply
Based on current project schedule, HEC anticipates there is no delay in the supply of natural gas.
5.2 Key Issues for the Coming Month
Key issues to be considered in the coming month include:
Unit
L9 Civil and Building Works
Noise Impact
· To continue monitoring the noise level during construction and to ensure compliance with the CNP’s already obtained.
· To continue executing the preventive measures for avoiding noise exceedance and keep monitoring/ reviewing the noise performance.
Air Impact
· To monitor and review the sufficiency of the dust suppression measures provided and increase the resources accordingly if necessary.
Unit
L9 Mechanical Erection
Noise Impact
· To continue monitoring the noise level during construction.
· To continue executing the preventive measures for avoiding noise exceedance and keep monitoring/ reviewing the noise performance.
Air Impact
· To monitor and review the sufficiency of the dust suppression measures provided and increase the resources accordingly if necessary.
Unit
L9 Electrical, Instrumentation & Control Erection
Noise Impact
· To continue monitoring the noise level during construction.
· To continue executing the preventive measures for avoiding noise exceedance and keep monitoring/ reviewing the noise performance.
Air Impact
· To monitor and review the sufficiency of the dust suppression measures provided and increase the resources accordingly if necessary.
Transmission
System
Noise Impact
· To continue monitoring the noise level during construction.
· To continue executing the preventive measures for avoiding noise exceedance and keep monitoring/ reviewing the performance.
Air Impact
· To monitor and review the sufficiency of the dust suppression measures provided and increase the resources accordingly if necessary.
Terrestrial Ecology Impact
· To closely monitor the construction activities in order to avoid disturbance to the rare plants.
· To provide temporary fire fighting equipment for prevention of fire within the work sites.
5.3 Monitoring Schedules for the Next 3 Months
With the completion of post-project monitoring, no further marine water quality monitoring for the reclamation works is required.
The tentative environmental monitoring schedules for the next 3 months are shown in Appendix C.
5.4 Construction Program for the Next 3 Months
The period of construction activity of slurry ash piping & filling is tentatively from April 2006 to June 2006. The tentative construction programs for the next 3 months are shown in Appendix J.Appendix J
The commissioning of Unit L9, the first 300MW class gas-fired unit at Lamma Extension, is scheduled to commence on 15 May 2006.
One (1) TSP sample was rescheduled owing to the breakdown of TSP sampler. Other than this, all monitoring work at designated stations was performed as scheduled satisfactorily. The environmental monitoring works and site inspection were performed as scheduled in the reporting month. All monitoring results were checked and reviewed.
No Action/Limit level exceedance on 1-hour and 24-hour TSP level was recorded in the reporting month.
No
Action/Limit level exceedance on noise was recorded in the reporting month.
Environmental mitigation measures recommended in the EM&A manual for the construction activities were implemented in the reporting month. One follow-up enquiry from EPD about the February case was received in the reporting month. It was related to an emergency work and EPD was replied accordingly. Besides this, no complaint against the construction activities was received. No prosecution was received for this Project in the reporting period.
A separate monthly EM&A report for submarine pipeline prepared by the consultant, as one of ET members, is shown in Appendix K.
The environmental performance of the Project was
generally satisfactory.