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
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 November 2009
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 thirty-eighth 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 November 2009.
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 periods:
Period |
Remark |
24/11/2009
11:08 to 25/11/2009 01:09 |
Fuel gas main flow
control valve abnormal trip
|
27/11/2009
02:04 to 30/11/2009 00:40 |
Misc. Plant outage
jobs
|
Improvement
Works for Lamma Extension
EPD Officials from Regional
Office (South) visited the Lamma Power Station Extension on 5 November
2009. There was no adverse comment
received from EPD regarding the site visit of Lamma Power Station Extension.
Civil works for installation
of light oil facilities, demineralization plant and fire service water
tank No.2 at Lamma Extension were carried out in the reporting
month.
Mechanical erection works
for installation of light oil facilities and demineralization plant at Lamma
Extension were carried out in the reporting month.
Fire services installation
works for demineralization plant and light oil facilities at Lamma Extension
were carried out in the reporting month.
Environmental
Monitoring Works
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 November 2009.
Unit L9 was out of service during the following periods:
Period |
Remark |
24/11/2009
11:08 to 25/11/2009 01:09 |
Fuel gas main flow
control valve abnormal trip
|
27/11/2009
02:04 to 30/11/2009 00:40 |
Misc. Plant outage
jobs
|
1.2
Improvement
Works for Lamma Extension
Civil works for installation of light oil facilities, demineralization plant and fire service water tank No.2 at Lamma Extension were carried out in the reporting month.
Mechanical
erection works for installation of light oil facilities and demineralization
plant at Lamma Extension were carried out in the reporting month.
Fire
services installation works for demineralization plant and light oil facilities
at 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.
EPD Officials
from Regional Office (South) visited the Lamma Power Station Extension on 5
November 2009. There was no adverse
comment 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 November 2009 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 |
01/11/09-30/11/09 |
0 |
0 |
|
Noise |
|||||
1 |
Noise levels at the critical NSR at Hung Shing Ye calculated by the noise alarm monitoring system |
01/11/09-30/11/09 |
0 |
0 |
|
Water |
|||||
1 |
Cooling Water Temperature Rise |
01/11/09-30/11/09 |
0 |
0 |
|
2 |
Total Residual Chlorine |
01/11/09-30/11/09 |
0 |
0 |
|
3 |
Temperature of Blowdown Effluent |
01/11/09-30/11/09 |
N.A. |
N.A.* |
|
4 |
Suspended Solids from Blowdown Effluent |
01/11/09-30/11/09 |
N.A. |
N.A.* |
|
5 |
Grease & Oil from Blowdown Effluent |
01/11/09-30/11/09 |
N.A. |
N.A.* |
|
6 |
Inspection of Scum/Foam in ambient water |
01/11/09-30/11/09 |
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 November 2009, no complaint against the Project was received.
Table 5.2 Environmental
Complaints / Enquiries Received in November 2009
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 (Natural Gas) |
Continuous |
81 mg/Nm3 |
90 mg/Nm3 |
Hourly Average Stack
NOx (Light Oil) |
Continuous |
135 mg/Nm3 |
150 mg/Nm3 |
Note:
Expressed as at 0ºC, 101.325kPa, dry and corrected to 15% O2
condition.
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: November 2009
Monthly Summary of
Stack NOx
Date |
Daily
Maximum Stack NOx concentration (mg/Nm3)# |
1/11/2009 |
47 |
2/11/2009 |
56 |
3/11/2009 |
69 |
4/11/2009 |
63 |
5/11/2009 |
57 |
6/11/2009 |
49 |
7/11/2009 |
46 |
8/11/2009 |
51 |
9/11/2009 |
49 |
10/11/2009 |
50 |
11/11/2009 |
51 |
12/11/2009 |
52 |
13/11/2009 |
59 |
14/11/2009 |
63 |
15/11/2009 |
61 |
16/11/2009 |
58 |
17/11/2009 |
65 |
18/11/2009 |
69 |
19/11/2009 |
68 |
20/11/2009 |
66 |
21/11/2009 |
69 |
22/11/2009 |
69 |
23/11/2009 |
67 |
24/11/2009 |
59 |
25/11/2009 |
55 |
26/11/2009 |
56 |
27/11/2009 |
57 |
28/11/2009 |
* |
29/11/2009 |
* |
30/11/2009 |
62 |
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 |
|||
01/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
01/11/2009 |
23:00-07:00 |
36 |
31 |
50 |
02/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
02/11/2009 |
23:00-07:00 |
35 |
33 |
50 |
03/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
03/11/2009 |
23:00-07:00 |
34 |
32 |
50 |
04/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
04/11/2009 |
23:00-07:00 |
27 |
27 |
50 |
05/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
05/11/2009 |
23:00-07:00 |
34 |
32 |
50 |
06/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
06/11/2009 |
23:00-07:00 |
19 |
19 |
50 |
07/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
07/11/2009 |
23:00-07:00 |
--- |
--- |
50 |
08/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
08/11/2009 |
23:00-07:00 |
--- |
--- |
50 |
09/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
09/11/2009 |
23:00-07:00 |
20 |
20 |
50 |
10/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
10/11/2009 |
23:00-07:00 |
25 |
25 |
50 |
11/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
11/11/2009 |
23:00-07:00 |
28 |
28 |
50 |
12/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
12/11/2009 |
23:00-07:00 |
--- |
--- |
50 |
13/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
13/11/2009 |
23:00-07:00 |
36 |
33 |
50 |
14/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
14/11/2009 |
23:00-07:00 |
31 |
29 |
50 |
15/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
15/11/2009 |
23:00-07:00 |
--- |
--- |
50 |
16/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
16/11/2009 |
23:00-07:00 |
34 |
33 |
50 |
17/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
17/11/2009 |
23:00-07:00 |
30 |
26 |
50 |
18/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
18/11/2009 |
23:00-07:00 |
27 |
26 |
50 |
19/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
19/11/2009 |
23:00-07:00 |
32 |
28 |
50 |
20/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
20/11/2009 |
23:00-07:00 |
37 |
33 |
50 |
21/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
21/11/2009 |
23:00-07:00 |
36 |
32 |
50 |
22/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
22/11/2009 |
23:00-07:00 |
33 |
30 |
50 |
23/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
23/11/2009 |
23:00-07:00 |
24 |
22 |
50 |
24/11/2009 |
07:00-23:00 |
40 |
40 |
60 |
24/11/2009 |
23:00-07:00 |
25 |
25 |
50 |
25/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
25/11/2009 |
23:00-07:00 |
--- |
--- |
50 |
26/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
26/11/2009 |
23:00-07:00 |
33 |
33 |
50 |
27/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
27/11/2009 |
23:00-07:00 |
32 |
30 |
50 |
28/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
28/11/2009 |
23:00-07:00 |
19 |
19 |
50 |
29/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
29/11/2009 |
23:00-07:00 |
31 |
28 |
50 |
30/11/2009 |
07:00-23:00 |
--- |
--- |
60 |
30/11/2009 |
23:00-07:00 |
34 |
31 |
50 |
Note: 1. “---
“ represents the measured noise monitoring data lower than the established
notional background level/discarded
under strong wind.
2. Pursuant to the EM&A Manual (Operational Phase), the corrections for accounting the differences of barrier attenuations and atmospheric absorption attenuations for the noise alarm station and noise sensitive receiver are 5 dB(A) and 2 dB(A) respectively.
Appendix
E Summary Results and Observations on Water Quality Monitoring
Maximum Outlet Temperature Rise (Deg. Celsius) of Cooling Water at
C.W. Outfall No.3 Serving L9 Condensers
Weighted by Flowrates of Individual Streams (November 2009)
Date |
Maximum
Outlet Temperature Rise (Deg.
Celsius) |
01/11/2009 |
8.6 |
02/11/2009 |
8.6 |
03/11/2009 |
8.6 |
04/11/2009 |
8.6 |
05/11/2009 |
8.7 |
06/11/2009 |
8.7 |
07/11/2009 |
8.7 |
08/11/2009 |
8.4 |
09/11/2009 |
8.3 |
10/11/2009 |
8.7 |
11/11/2009 |
8.3 |
12/11/2009 |
8.7 |
13/11/2009 |
8.5 |
14/11/2009 |
8.1 |
15/11/2009 |
8.1 |
16/11/2009 |
8.0 |
17/11/2009 |
7.9 |
18/11/2009 |
8.1 |
19/11/2009 |
8.1 |
20/11/2009 |
8.1 |
21/11/2009 |
8.1 |
22/11/2009 |
8.1 |
23/11/2009 |
8.2 |
24/11/2009 |
8.1 |
25/11/2009 |
8.2 |
26/11/2009 |
8.1 |
27/11/2009 |
8.2 |
28/11/2009 |
* |
29/11/2009 |
* |
30/11/2009 |
8.6 |
Total Residual Chlorine Level at C.W. Outfall No. 3 (November 2009)
Date of sampling |
04/11/2009 |
18/11/2009 |
Total
Residual Chlorine, mg/L |
0.40 |
0.40 |
Blowdown from
Unit L9 Steam Turbine and HRSG to C.W. Outfall No. 3 (November 2009)
Source of Discharge |
HSRG |
Steam Turbine |
Suspended Solid, mg/L |
# |
# |
Grease & Oil, mg/L |
# |
# |
Temperature, Deg. Celsius |
# |
# |
Observation
of Scum Formation in Marine Waters Mixing Zone at Lamma Power Station Extension
(November
2009)
Date |
Observation |
01/11/2009 |
No scum within 500m of HSY Beach & NW/SW corner of the Station;
Some foam outside CW Outfall and dispersed by suppression pump. |
02/11/2009 |
No scum within 500m of |
03/11/2009 |
No scum within 500m of |
04/11/2009 |
No scum within 500m of |
05/11/2009 |
No scum within 500m of HSY Beach & NW/SW corner of the Station;
Some foam outside CW Outfall and dispersed by suppression pump. |
06/11/2009 |
No scum within 500m of HSY Beach & NW/SW corner of the Station;
Some foam outside CW Outfall and dispersed by suppression pump. |
07/11/2009 |
No scum within 500m of HSY Beach & NW/SW corner of the Station;
Some foam outside CW Outfall and defoamer added to Outfalls No.1 & No.2 |
08/11/2009 |
No scum within 500m of HSY Beach & NW/SW corner of the Station;
Some foam outside CW Outfall and defoamer added to Outfalls No.1 & No.2 |
09/11/2009 |
No scum within 500m of HSY Beach & NW/SW corner of the Station;
Some foam outside CW Outfall and defoamer added to Outfalls No.1 & No.2 |
10/11/2009 |
No scum within 500m of HSY Beach & NW/SW corner of the Station;
Some foam outside CW Outfall and defoamer added to Outfalls No.1 & No.2 |
11/11/2009 |
No scum within 500m of HSY Beach & NW/SW corner of the Station;
Some foam outside CW Outfall and defoamer added to Outfalls No.1 & No.2 |
12/11/2009 |
No scum within 500m of HSY Beach & NW/SW corner of the Station;
Some foam outside CW Outfall and defoamer added to Outfalls No.1 & No.2 |
13/11/2009 |
No scum within 500m of HSY Beach & NW/SW corner of the Station;
Some foam outside CW Outfall and defoamer added to Outfalls No.1 & No.2 |
14/11/2009 |
No scum within 500m of HSY Beach & NW/SW corner of the Station;
Some foam outside CW Outfall and defoamer added to Outfalls No.1 & No.2 |
15/11/2009 |
No scum within 500m of HSY Beach & NW/SW corner of the Station;
Some foam outside CW Outfall and defoamer added to Outfalls No.1 & No.2 |
16/11/2009 |
No scum within 500m of HSY Beach & NW/SW corner of the Station;
Some foam outside CW Outfall and defoamer added to Outfalls No.1 & No.2 |
17/11/2009 |
No scum within 500m of |
18/11/2009 |
No scum within 500m of |
19/11/2009 |
No scum within 500m of |
20/11/2009 |
No scum within 500m of |
21/11/2009 |
No scum within 500m of |
22/11/2009 |
No scum within 500m of |
23/11/2009 |
No scum within 500m of |
24/11/2009 |
No scum within 500m of |
25/11/2009 |
No scum within 500m of |
26/11/2009 |
No scum within 500m of |
27/11/2009 |
No scum within 500m of |
28/11/2009 |
No scum within 500m of |
29/11/2009 |
No scum within 500m of |
30/11/2009 |
No scum within 500m of |
Notes: |
|
1. *
Unit L9 was not on load. |
|
2. #
Monitoring was not scheduled in the reporting month. The last monitoring was carried out in September
2009. |
|
3. The
water spraying system at C.W. Outfall was in service on 1 & 5 to 30
November 2009. |
EM&A Log Ref. |
Mitigation Measures |
Implementation Status |
|
Air Quality |
|
A1 |
Implement the gas-fired units as base-load units. For the existing power station, the more efficient units incorporating FGD and low NOx systems shall be operated first under normal situation to meet system demand. In case of any deviations from this, EPD shall be notified of the details and circumstances for the deviation. |
Complied |
A2 |
HK Electric shall undertake annual revisions and update of its GHG emissions
inventory, which covers all HK Electric existing facilities and new extension,
for at least the six GHGs specified under the Kyoto Protocol (CO2, CH4, N2O,
HFCs, PFCs and SF6). The inventory
shall be established and maintained in accordance with the latest IPCC
Guidelines or any other guidelines issued by Government, with details
documented for regular reviews and updates. The inventory shall be reported
on an annual basis, including actual figures and targets for the previous and
current years, as well as the next year's forecast. Discrepancies for actual versus target
figures and actions for improvement or enhancement shall be discussed. HK Electric shall update
the inventory according to the figures of the electricity load forecast, upon
every subsequent review by the Government.
This shall also be reported in the annual report. (The annual report of GHG emissions inventory shall be deposited with the Director of Environmental Protection within three months after the end of the reporting period.) |
Complied |
|
|
|
|
Water Quality |
|
B1 |
No further mitigation measures were found to be necessary provided the
discharge of cooling water and residual chlorine are kept below the rates
assumed in the water quality assessment*. *All discharges of effluent/wastewater shall be controlled through licensing under the Technical Memorandum for Effluents Discharged into Drainage and Sewerage Systems. Inland and Coastal Waters, issued under Section 21 of the Water Pollution Control Ordinance. |
Complied |
|
|
|
|
Noise |
|
C1 |
HK Electric shall implement the gas-fired units for based-load operation to minimize the noise generated from the existing units. |
Complied |
|
|
|
|
Landscape & Visual impacts |
|
D1 |
No mitigation measures were considered necessary. |
N/A |
|
|
|
EM&A Log Ref. |
Mitigation Measures |
Implementation Status |
|
LAND CONTAMINATION AND WASTE MANAGEMENT |
|
E1 |
HK Electric shall maintain records of the
following items: - integrity testing of light oil tanks*; - daily inspection of the light oil tanks and bunded areas*; - quantities of oily waste and sludge generated from oil
interceptors and chemical waste generated from operation of the power
station; - deposal oil oily waste/sludge and chemical waste to licenced
site; - quantities of chemical and chemical waste; - incident of spillage and remediation actions; and - emergency response training and drills. * As the
Light Gas Oil (LGO) for Lamma Extension is supplied from the existing LGO
storage tanks located at Lamma Power Station, there is no LGO storage tank at
Lamma Extension. |
Complied |
|
Marine Ecology |
|
F1 |
No mitigation measures were considered necessary. |
N/A |
|
|
|
|
fisheries |
|
G1 |
No mitigation measures were considered necessary. |
N/A |
|
|
|
|
RISK ASSESSMENT |
|
H1 |
No mitigation measures were considered necessary. |
N/A |