Table of Content
1.2 Improvement Works for Lamma Extension
1.3 Summary of EM&A Requirements
2.2 Summary of Results and Observations
3.2 Summary of Results and Observations
4.2 Summary of Results and Observations
4.3 Implementation Status on Thermal Plume and Total
Residual Chlorine Survey
5.1 Review of Environmental Monitoring
Procedures
5.2 Assessment
of Environmental Monitoring Results
5.3 Implementation Status of Environmental
Mitigation Measures
5.4 Implementation Status of Event/Action Plans
5.5 Implementation Status of Environmental
Complaint Handling Procedures
6.1 Outage Plan for the coming 3 months
6.2 Key issues for the coming month
List of Tables
Table 2.1 Air
Quality Monitoring Parameter and Frequency
Table 3.1 Noise Monitoring Parameter and Frequency
Table 4.1 Water
Quality Monitoring Parameters and Frequencies
Table 5.1 Summary of Action/Limit Level Exceedances on Monitoring Parameters
Table 5.2 Environmental Complaints / Enquiries Received in December 2008
Table 5.3 Outstanding Environmental Complaints / Enquiries Carried Over
List of figure
Figure 3.1 Location
of Noise Monitoring Station
AppendiX
Appendix B Action and Limit Levels for Air Quality, Noise and Water Quality Monitoring
Appendix C Air Quality Monitoring Results
Appendix D Noise Monitoring Results
Appendix E Summary
Results and Observations on Water Quality Monitoring
This is the twenty-seventh monthly Environmental Monitoring and Audit (EM&A) report for the Project “Operation of Lamma Power Station Extension” prepared by the Environmental Team (ET). This report presents the results of impact monitoring on air quality, noise, water quality and environmental audit for the operation of the said project in December 2008.
Air
quality, noise and water quality
monitoring were performed. The results were checked against the established
Action/Limit (AL) levels. The implementation status of the
environmental mitigation measures, Event/Action Plan and
environmental complaint handling procedures were also checked.
Plant
Availability
Unit L9 was out of service during the following period:
|
Period |
Remark |
|
18/12/2008
23:51 to 28/12/2008 23:34 |
Unit Overhaul
|
|
29/12/2008
23:05 to 30/12/2008 06:37 |
Defect Rectification
|
|
30/12/2008
14:09 to 31/12/2008 10:46 |
Defect
Rectification
|
Improvement
Works for Lamma Extension
Civil works for
installation of light oil facilities, demineralization plant and fire service water
tank No.2 for Lamma Extension were carried out in the reporting
month.
Environmental
Monitoring Works
EPD Officials from Regional
Office (South) visited the Lamma Power Station Extension on 10 December
2008. There were no adverse comments
received from EPD regarding the site visit of Lamma Power Station Extension.
Environmental monitoring works, as mentioned in the EM&A Manual (Operational
phase), were performed during the operation of Lamma Power Station Extension in the reporting
period.
Air Quality
No exceedance of Action and Limit levels for stack NOx was
recorded in the reporting month
Noise
No exceedance of Action and Limit levels for noise was recorded in the reporting month.
Water Quality
No exceedance of Action and Limit levels for water quality was recorded in the reporting month.
Implementation
Status of Environmental Mitigation Measures
Environmental
mitigation measures were implemented in the reporting month.
Environmental
Complaints
No complaint against the Project was received in the reporting month.
Future Key Issues
Key issues to be considered in the coming month include:
Air Impact
· To continuously monitor the stack NOx for Lamma Power Station Extension.
Noise Impact
· To continuously monitor the noise for Lamma Power Station Extension.
Water Impact
· To continuously carry out the water quality monitoring for Lamma Power Station Extension.
Concluding
Remarks
The
environmental performance of the project was generally satisfactory.
The operational phase Lamma
Power Station Extension commenced in mid October 2006 following the completion
of erection works and commissioning tests for Unit L9. The Environmental Team (hereinafter called
the “ET”) was formed within The Hongkong Electric
This report
summarizes the environmental monitoring and audit work for the Project for the
month of December 2008.
Unit L9 was out of service during the following period:
|
Period |
Remark |
|
18/12/2008
23:51 to 28/12/2008 23:34 |
Unit Overhaul
|
|
29/12/2008
23:05 to 30/12/2008 06:37 |
Defect Rectification
|
|
30/12/2008
14:09 to 31/12/2008 10:46 |
Defect Rectification
|
1.2
Improvement
Works for Lamma Extension
Civil works for installation of light oil facilities, demineralization plant and fire service water tank No.2 for Lamma Extension were carried out in the reporting month.
1.3 Summary of EM&A Requirements
The EM&A program requires environmental monitoring for air quality, noise and water quality. The EM&A monitoring work for air quality, noise and water quality are described in Sections 2, 3 and 4 respectively.
The
following environmental audits are summarized in Section 5 of
the report:
·
Environmental
monitoring results;
·
The
implementation status of environmental protection and pollution control /
mitigation measures.
The future key issues for the Project will be reported in Section 6 of this report.
In accordance
with the EM&A Manual (Operational Phase) for Lamma Extension,
stack NOx is continuously monitored. Stack NOx monitoring data would be checked
against the Action/Limit
Levels stated in the EM&A Manual. The monitoring frequency is shown in Table 2.1 below:
Table 2.1 Air Quality
Monitoring Parameter and Frequency
|
Parameter |
Frequency |
|
Hourly
Average Stack NOx |
Continuous |
2.2
Summary
of Results and Observations
Monitoring
of stack NOx was
conducted during the operation of Unit L9 in the reporting month. A monthly summary of monitoring data is shown in Appendix
C.
No Action/Limit Level
exceedance on stack NOx was
recorded in the reporting month.
In accordance with the EM&A Manual
for Lamma Extension (Operational Phase), continuous noise monitoring at Ash Lagoon is carried out to calculate the noise arising from the operation of Lamma Extension at the critical NSR at Hung
Shing Ye. Baseline noise levels are applied for
correction to the noise monitoring data.
The data after corrections would be checked
against the Limit Levels specified in the EM&A Manual.
The noise monitoring location is shown in Figure 3.1. The monitoring parameter and frequency are shown in Table 3.1 below:
Table 3.1 Noise
Monitoring Parameter and Frequency
|
Parameter |
Frequency |
Time Period |
|
30-min LAeq |
continuous |
0700-2300 hrs and 2300-0700 hrs of next
day |
3.2 Summary of Results and Observations
Continuous
noise monitoring was conducted at the monitoring station at Ash Lagoon. The monitoring results are shown in Appendix D.
No Action/Limit Level exceedance on noise was recorded in the reporting month.
Figure 3.1 Location of
Noise Monitoring Station
In accordance with the EM&A Manual for Lamma
Extension (Operational Phase), the monitoring requirements for the EM&A
work should strictly follow the discharge licence for L1-L9 & GT57 issued
under the Water Pollution Control Ordinance (WPCO).
The parameters as stated in Table 4.1 were monitored and checked against the
Action/Limit Levels as given in Appendix B.
Table 4.1 Water Quality
Monitoring Parameters and Frequencies
|
Item |
Parameters |
Frequencies |
|
1 |
Cooling
Water Temperature Rise |
Daily |
|
2 |
Total
Residual Chlorine |
Bi-weekly
|
|
3 |
Temperature of
Blowdown Effluent |
At
least twice per year |
|
4 |
Suspended
Solids from Blowdown Effluent |
At
least twice per year |
|
5 |
Grease
& Oil from Blowdown Effluent |
At
least twice per year |
|
6 |
Scum of
foam in ambient water |
Daily |
4.2
Summary
of Results and Observations
Monitoring of various parameters as listed in Table 4.1
above was carried out during the operation of Unit L9 in the reporting month. A monthly summary of the data is shown in Appendix E.
The data recorded for the monitoring parameters
were all below their corresponding Action/Limit Levels. No Action/Limit level exceedance was recorded in the reporting
month. There was no foam present within
500 meters of Hung Sing Ye Beach in the reporting month. Details of the foam
observation report are also given in Appendix E. The effluent quality was generally satisfactory.
4.3
Implementation Status on Thermal Plume and Total
Residual Chlorine Survey
One
survey for thermal plume and total residual chlorine concentration at the
seawater around the discharges from the Lamma Power Station and Lamma Power
Station Extension shall be carried out after the commissioning of each of the
generating units for the Project in dry and wet seasons. With the endorsement of the technical requirements for the
survey by EPD, the first survey of thermal plume and total residual
chlorine concentration for the first gas-fired combined cycle unit L9 for neap and spring tides in dry
season were carried out on 28 February 2008 and 19 March 2008
respectively. The monitoring result of the survey in dry
season was submitted to EPD on 19 July 2008 through a separate report.
The
surveys for wet season were conducted on 29 August 2008 and 5 September 2008
for spring and neap tides respectively and were witnessed by the EPD Officials
of Regional Assessment Group. There was
no adverse comment received from EPD during the surveys. The
monitoring result of the survey in wet season was submitted to EPD on 9 January
2009 through a separate report.
EPD Officials from Regional Office (South) visited the Lamma Power Station Extension on 10 December 2008. There were no adverse comments received from EPD regarding the site visit of Lamma Power Station Extension.
5.1
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.
5.2
Assessment of Environmental Monitoring Results
Monitoring results for Air Quality, Noise and Water Quality
The environmental monitoring results for air quality, noise and water quality in December 2008 presented in Sections 2, 3 and 4 respectively are summarized in Table 5.1.
Table 5.1 Summary of Action/Limit 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 |
Stack NOx |
01/12/08-31/12/08 |
0 |
0 |
|
|
Noise |
|||||
|
1 |
Noise levels at the critical NSR at Hung Shing Ye calculated by the noise alarm monitoring system |
01/12/08-31/12/08 |
0 |
0 |
|
|
Water |
|||||
|
1 |
Cooling Water Temperature Rise |
01/12/08-31/12/08 |
0 |
0 |
|
|
2 |
Total Residual Chlorine |
01/12/08-31/12/08 |
0 |
0 |
|
|
3 |
Temperature of Blowdown Effluent |
01/12/08-31/12/08 |
N.A. |
N.A.* |
|
|
4 |
Suspended Solids from Blowdown Effluent |
01/12/08-31/12/08 |
N.A. |
N.A.* |
|
|
5 |
Grease & Oil from Blowdown Effluent |
01/12/08-31/12/08 |
N.A. |
N.A.* |
|
|
6 |
Inspection of Scum/Foam in ambient water |
01/12/08-31/12/08 |
0 |
0 |
|
Note: * Monitoring was not scheduled in the
reporting month
Land Contamination
There
was no land contamination incident happened in the reporting month.
Waste Management
Waste
management practice was properly implemented for operation of the project as
outlined in the Waste Management Plan for Lamma Power Station Extension. There
was no unacceptable environmental impact on waste management in the reporting
month.
5.3
Implementation Status of
Environmental Mitigation Measures
Mitigation measures
detailed in the permits and the EM&A Manual (Operational Phase) are
required to be implemented. An updated
summary of the Environmental
Mitigation Implementation Schedule (EMIS) is presented
in Appendix F.
5.4 Implementation Status of Event/Action Plans
The Event/Action Plans for air quality, noise and water quality extracted from the EM&A Manual (Operational Phase) are presented in Appendix A.
5.5 Implementation Status of Environmental Complaint Handling Procedures
In December 2008, no complaint against the Project was received.
Table 5.2 Environmental
Complaints / Enquiries Received in December 2008
|
Case Reference / Date, Time Received / Date, Time Concerned |
Descriptions / Actions Taken |
Conclusion / Status |
|
Nil |
N/A |
N/A |
Table 5.3 Outstanding Environmental Complaints / Enquiries Carried Over
|
Case Reference / Date, Time Received / Date, Time Concerned |
Descriptions / Actions Taken |
Conclusion / Status |
|
Nil |
N/A |
N/A |
6.1
Outage
Plan for the coming 3 months
No major outage is planned for the next 3 months.
6.2 Key issues for the coming month
Key issues to be considered in the coming month include:
Air Impact
· To continuously monitor the stack NOx for Lamma Power Station Extension.
Noise
Impact
· To continuously monitor the noise for Lamma Power Station Extension.
Water Impact
·
To continuously carry out the
water quality monitoring for Lamma Power Station Extension.
Environmental monitoring was performed as required in the reporting month. All monitoring results were checked and reviewed.
No
Action/Limit level
exceedance on stack NOx was recorded in the reporting
month
No Action/Limit level exceedance on noise was recorded in the reporting month.
No Action/Limit level exceedance on water quality parameters was recorded in the reporting month.
Environmental
mitigation measures recommended in the EM&A Manual for the operational
activities were implemented in the reporting month. No complaint against the Project was received in the reporting month. No prosecution was
received for this Project in the reporting period.
The environmental performance of the Project was
generally satisfactory.
Table A.1 Event/Action Plan for Air Quality
|
Exceedance |
ET Leader |
IEC |
Operations Engineer |
|
Action Level |
|||
|
Exceedance of
one sample |
Identify source; Inform IEC
verbally; Repeat
measurement to confirm finding. |
Check monitoring
data submitted by ET Leader and advise ET Leader for any finding. |
Rectify any
unacceptable practice; Amend any working methods if appropriate. |
|
|
|
|
|
|
Exceedance of
two or more consecutive samples |
Identify source; Inform IEC
verbally; Repeat
measurement to confirm finding; Increase
monitoring frequency; Discuss with Operations Engineers on remedial actions required; If exceedance
stops, discontinue additional monitoring. |
Check monitoring
data submitted by ET Leader and advise ET Leader for any finding; Verify the
implementation of the remedial measures; |
Discuss with ET Leader on remedial actions required; Implement the
agreed remedial actions. |
|
Limit level |
|||
|
Exceedance of
one sample |
Repeat
measurement to confirm finding; Identify the
source(s) of the impact. Verbally inform
IEC and EPD of the exceedance as soon as practicable; Discuss with Operations Engineers on remedial actions required; Increase
monitoring frequency; Assess the
effectiveness of the remedial actions and keep IEC and EPD informed of the
results. |
Check monitoring
data submitted by ET Leader and advise ET Leader of any finding; Verify the implementation
of the remedial measures. |
Take immediate
action to avoid further exceedances; Discuss with ET Leader on remedial actions
required; Implement the
agreed remedial actions. |
|
|
|
|
|
|
Exceedance of
two or more consecutive samples |
Identify source; Identify the
source(s) of the impact. Verbally inform IEC and EPD of the exceedance
as soon as practicable; Repeat
measurement to confirm finding; Increase
monitoring frequency; Carry out
analysis on existing control procedures to determine
possible mitigation to be implemented; Discuss with Operations Engineers on the remedial actions to be taken; If exceedance
stops, discontinue additional monitoring. |
Provide feedback
and advise ET Leader/Operations Engineers on the effectiveness of the remedial actions proposed by them; Verify the
implementation of the remedial measures. |
Take immediate
action to avoid further exceedance; Discuss with ET Leader on remedial actions
required; Implement the
agreed remedial actions; Check the suspected defective parts if the problem still does not come
under control. |
Table A.2 Event/Action Plan for Noise
|
Exceedance |
ET Leader |
IEC |
Operations Engineer |
|
Action Level |
If the complaint against Lamma
Extension operation is valid, identify the source(s) of the noise and propose remedial measures if necessary; |
Verify
the implementation of the remedial measures. |
Discuss
with ET Leader on
remedial actions required; Implement the agreed remedial actions. |
|
Limit Level |
Check monitoring data to confirm
findings; Identify
the source(s) of the impact. If the exceedance is found to be valid and due to
the Lamma Extension operation, verbally inform IEC and EPD of the exceedance as soon as practicable; Discuss with Operations Engineers on remedial actions required. |
Check monitoring
data submitted by ET Leader and advise ET Leader of any finding; Verify
the implementation of the remedial measures. |
Take
action to avoid further exceedance; Discuss
with ET Leader on
the remedial actions required; Implement the agreed remedial actions. |
Table A.3 Event/Action Plan for Water Quality
|
Exceedance
|
ET
Leader |
IEC |
Operations Engineer |
|
Action
Level |
|
||
|
Exceedance on one sampling day |
Identify
source(s) of impact; Verbally
inform IEC. |
Check monitoring data submitted by ET Leader and
advise ET Leader for any findings. |
Rectify
unacceptable practice; Amend any working methods if appropriate. |
|
Exceedances on more than one consecutive sampling day |
Identify
source(s) of impact; Verbally
inform IEC; Repeat
in-situ measurements to confirm findings; Discuss with Operations Engineers on remedial actions required; Increase monitoring frequency; If exceedance stops, discontinue additional
monitoring. |
Check
monitoring data submitted by ET Leader and
advise ET Leader for any
finding; Verify
the implementation of the remedial measures. |
Discuss
with ET Leader on remedial actions required; Implement
the agreed remedial actions. |
|
Limit Level |
|
|
|
|
Exceedance on one sampling day |
Identify
the source(s) of impact; Verbally
inform IEC and EPD of the exceedance, as soon as practicable; Repeat
measurement to confirm finding; Discuss with Operations Engineers on remedial actions required; Increase
monitoring frequency; Assess
the effectiveness of the remedial actions and keep IEC and EPD informed of
the results. |
Check
monitoring data submitted by ET Leader and
advise ET Leader for any
finding; Verify
the implementation of the remedial measures. |
Take
immediate action to avoid further exceedance; Discuss
with ET Leader on remedial actions required; Implement
the agreed remedial actions. |
|
Exceedances on
more than one consecutive sampling day |
Identify
the source(s) of impact; Verbally
inform IEC and EPD of the exceedance as soon as practicable; Repeat
measurement to confirm finding; Discuss with Operations Engineers on remedial actions required; Increase
monitoring frequency; Carry
out analysis on existing control procedures
to determine possible mitigation to be implemented; If
exceedance stops, discontinue additional monitoring. |
Provide
feedback and advise ET Leader/Operations
Engineers on the effectiveness
of the remedial actions proposed; Verify
the implementation of the remedial measures. |
Take
immediate action to avoid further exceedance; Discuss
with ET Leader on remedial actions required; Implement
the agreed remedial actions; Check the suspected defective parts if the problem
still does not come under control. |
Appendix B Action and Limit
Levels for Air Quality, Noise and Water Quality Monitoring
B.1 Air
|
Parameter |
Frequency |
Action |
Limit |
|
Hourly Average Stack NOx |
Continuous |
81 mg/Nm3 |
90 mg/Nm3 |
B.2. Noise
|
Parameter |
Frequency |
Action |
Limit |
|
Noise Levels at the critical
NSR at Hung
Shing Ye calculated by the noise alarm monitoring system |
Continuous |
When more than one complaint
is received within two weeks, which are concerning the same event or location |
a. 60
dB(A) in LAeq,30
min (07:00-23:00 hrs) b. 50
dB(A) in LAeq,30
min (23:00-07:00 hrs on next day) |
B.3 Water
|
Monitoring Area / Location |
Parameters to be Monitored |
Frequency |
Concentration Not to Be Exceeded |
Action |
Limit |
|
Trade
Effluent Cooling Water |
Temperature |
Daily, when the combined cycle unit is operating |
Temperature at outfall should
not exceed that at intake by > 10°C |
9.5°C |
+10°C
above intake |
|
Total Residual Chlorine |
Bi-weekly, when the combined cycle unit is
operating |
0.5mg/L |
0.47 |
0.5 |
|
|
Trade Effluent Boiler Blowdown |
Temperature |
At least twice per year, when the combined cycle unit is operating |
40°C |
- |
40°C |
|
Suspended Solids |
At least twice per year, when the combined cycle unit is operating |
30 mg/L |
- |
30 |
|
|
Grease & Oil |
At least twice per year, when the combined cycle unit is operating |
20 mg/L |
- |
20 |
|
|
Marine waters cooling water outfall |
Scum
of foam in ambient water |
Daily, when the combined cycle unit is operating |
No scum within 500 m of Hung Shing Ye Beach |
When scum passes the station south-west corner and north-west corner |
No scum within 500 m of Hung Shing Ye Beach |
Appendix
C Air Quality Monitoring Results
Site: Lamma Power Station – Unit L9
Month: December 2008
Monthly Summary of
Stack NOx
|
Date |
Daily
Maximum Stack NOx concentration (mg/Nm3)# |
|
1/12/2008 |
64 |
|
2/12/2008 |
63 |
|
3/12/2008 |
62 |
|
4/12/2008 |
64 |
|
5/12/2008 |
67 |
|
6/12/2008 |
* |
|
7/12/2008 |
* |
|
8/12/2008 |
70 |
|
9/12/2008 |
67 |
|
10/12/2008 |
67 |
|
11/12/2008 |
63 |
|
12/12/2008 |
59 |
|
13/12/2008 |
61 |
|
14/12/2008 |
66 |
|
15/12/2008 |
64 |
|
16/12/2008 |
62 |
|
17/12/2008 |
61 |
|
18/12/2008 |
62 |
|
19/12/2008 |
* |
|
20/12/2008 |
* |
|
21/12/2008 |
* |
|
22/12/2008 |
* |
|
23/12/2008 |
* |
|
24/12/2008 |
* |
|
25/12/2008 |
* |
|
26/12/2008 |
* |
|
27/12/2008 |
* |
|
28/12/2008 |
* |
|
29/12/2008 |
59 |
|
30/12/2008 |
60 |
|
31/12/2008 |
53 |
Note: # - Hourly average value. Expressed as at 0ºC, 101.325kPa, dry and
corrected to 15% O2 condition.
* - Unit L9 was not on load.
Appendix
D Noise Monitoring Results
Site: Lamma Power
Station Extension
Measurement Location: Ash Lagoon
Measurement Parameter: 30-min Leq (07:00-23:00 hrs
and 23:00-07:00 hrs on next
day)
|
Date |
Time |
Calculated Noise Level at NSR
at Hung Shing Ye (dB(A)) |
Limit Noise Level (dB(A)) |
|
|
Max |
Avg |
|||
|
01/12/2008 |
07:00-23:00 |
43 |
37 |
60 |
|
01/12/2008 |
23:00-07:00 |
34 |
33 |
50 |
|
02/12/2008 |
07:00-23:00 |
34 |
34 |
60 |
|
02/12/2008 |
23:00-07:00 |
--- |
--- |
50 |
|
03/12/2008 |
07:00-23:00 |
40 |
37 |
60 |
|
03/12/2008 |
23:00-07:00 |
32 |
31 |
50 |
|
04/12/2008 |
07:00-23:00 |
37 |
34 |
60 |
|
04/12/2008 |
23:00-07:00 |
34 |
31 |
50 |
|
05/12/2008 |
07:00-23:00 |
51 |
49 |
60 |
|
05/12/2008 |
23:00-07:00 |
31 |
30 |
50 |
|
06/12/2008 |
07:00-23:00 |
--- |
--- |
60 |
|
06/12/2008 |
23:00-07:00 |
33 |
30 |
50 |
|
07/12/2008 |
07:00-23:00 |
--- |
--- |
60 |
|
07/12/2008 |
23:00-07:00 |
31 |
30 |
50 |
|
08/12/2008 |
07:00-23:00 |
--- |
--- |
60 |
|
08/12/2008 |
23:00-07:00 |
30 |
30 |
50 |
|
09/12/2008 |
07:00-23:00 |
--- |
--- |
60 |
|
09/12/2008 |
23:00-07:00 |
--- |
--- |
50 |
|
10/12/2008 |
07:00-23:00 |
--- |
--- |
60 |
|
10/12/2008 |
23:00-07:00 |
31 |
30 |
50 |
|
11/12/2008 |
07:00-23:00 |
31 |
31 |
60 |
|
11/12/2008 |
23:00-07:00 |
29 |
27 |
50 |
|
12/12/2008 |
07:00-23:00 |
34 |
34 |
60 |
|
12/12/2008 |
23:00-07:00 |
29 |
29 |
50 |
|
13/12/2008 |
07:00-23:00 |
37 |
36 |
60 |
|
13/12/2008 |
23:00-07:00 |
28 |
25 |
50 |
|
14/12/2008 |
07:00-23:00 |
--- |
--- |
60 |
|
14/12/2008 |
23:00-07:00 |
42 |
40 |
50 |
|
15/12/2008 |
||||