Table
of Content
1.2 Summary of EM&A Requirements
2.2 Summary of Results and Observations
2.3 Implementation
Status of Monitoring of Ammonia
3.2 Summary of Results and Observations
4.2 Summary of Results and Observations
4.3 Implementation Status on Thermal Plume and Residual
Chlorine Surveys
5.1 Review of Environmental
Monitoring Procedures
5.2 Assessment of Environmental Monitoring
Results
5.3 Status of Environmental Licensing and Permitting
5.4 Implementation Status of
Environmental Mitigation Measures
5.5 Implementation Status of Event/Action Plans
5.6 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 Summary of Environmental Licensing and Permit Status
Table 5.3 Environmental Complaints Received in June 2025
Table 5.4 Outstanding Environmental Complaints 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 225th
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 June 2025.
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 L11 was fully
available in the reporting month. Units L9,
L10 and L12 were out of service during the following period.
|
Unit |
Period |
Remark |
|
L9 |
13/06/2025 22:27 to 14/06/2025 05:59 |
Generator slip-ring carbon brushes renewal
work |
|
L9 |
14/06/2025 21:56 to 16/06/2025 06:06 |
Defect rectification |
|
L9 |
28/06/2025 21:57 to 30/06/2025 05:28 |
Defect rectification and CW intake bar screen
cleaning |
|
L10 |
05/06/2025 20:57 to 06/06/2025 06:15 |
Control oil fullers earth filter and backup
filter replacement |
|
L10 |
27/06/2025 23:52 to 28/06/2025 05:41 |
GRS PRS stream 2 inlet valve gearbox
replacement |
|
L12 |
20/06/2025 20:01 to 21/06/2025 06:05 |
Generator slip-ring carbon brushes renewal
work |
Environmental
Monitoring Works
EPD officials from Regional
Office (South) visited Lamma Power Station on 25/6/2025. There was no adverse comment received from
EPD regarding the operation 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.
Environmental
Licensing and Permitting
|
Description |
Permit
/
Licence No. |
Valid Period |
Issued
To |
Date of Issuance |
|
|
From |
To |
||||
|
Environmental Permit |
EP-071/2000/D |
28/09/2020 |
- |
HK Electric |
28/09/2020 |
|
Specified Processes Licence
issued under APCO |
L-7-002(15) |
01/01/2025 |
31/12/2026 |
HK Electric |
18/11/2024 |
|
WPCO Discharge Licence for L1-L12 |
WT10001965-2023 |
18/10/2024 |
30/11/2025 |
HK Electric |
18/10/2024 |
Implementation
Status of Environmental Mitigation Measures
Environmental
mitigation measures were implemented in the reporting month.
Environmental
Complaints
No complaint in relation to the environmental impact of 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 Co., Ltd. (HK Electric) to undertake Environmental Monitoring and Audit
for “Operation of Lamma Power Station Extension” (hereinafter called the
“Project”). Under the requirements of
Section 6 of Environmental Permit EP-071/2000/D, an EM&A programme for impact
environmental monitoring set out in the EM&A Manual (Operational Phase) is
required to be implemented. In
accordance with the EM&A Manual, environmental monitoring of air quality,
noise and water quality are required for the Project.
This report summarizes the environmental monitoring
and audit work for the Project for the month of June 2025.
Unit L10 was fully available in the reporting month. Units L9, L11 and L12 were out of service
during the following period.
|
Unit |
Period |
Remark |
|
L9 |
13/06/2025 22:27 to 14/06/2025 05:59 |
Generator slip-ring carbon brushes renewal
work |
|
L9 |
14/06/2025 21:56 to 16/06/2025 06:06 |
Defect rectification |
|
L9 |
28/06/2025 21:57 to 30/06/2025 05:28 |
Defect rectification and CW intake bar screen
cleaning |
|
L10 |
05/06/2025 20:57 to 06/06/2025 06:15 |
Control oil fullers earth filter and backup
filter replacement |
|
L10 |
27/06/2025 23:52 to 28/06/2025 05:41 |
GRS PRS stream 2 inlet valve gearbox
replacement |
|
L12 |
20/06/2025 20:01 to 21/06/2025 06:05 |
Generator slip-ring carbon brushes renewal
work |
1.2
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 Units L9, L10, L11 and L12 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.
2.3
Implementation Status of Monitoring of Ammonia
Monitoring of
ammonia for the use of Selective Catalytic Reduction System for NOx control was
conducted pursuant to the requirement of Specified Process (SP) licence under
the Air Pollution Control Ordinance. No
non-compliance of SP licence requirement on stack NH3
emission was recorded in the reporting month.
The relevant data would be submitted to EPD under a separate submission
for the SP licence. To avoid duplication of effort,
the monitoring and reporting requirements for ammonia under the SP licence will not be included in this EM&A programme.
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 |
With the endorsement
of the Independent Environmental Checker, the enhancement of calibration of
sound level meter at the noise monitoring station was implemented. The monthly manual on-site calibration using
sound level calibrator was replaced by the daily auto charge injection
calibration function of the sound level meter.
For additional quality assurance, manual on-site calibration is still conducted
for the noise monitoring station once every 6 months. The manual on-site calibration was carried
out in February 2025 and the next calibration was scheduled in August 2025. The verification of the sound level
meter/calibrator by the manufacturer or an accredited laboratory biennially /
annually remains unchanged.
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-L12 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 Units L9, L10, L11 and L12 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 Residual Chlorine Surveys
One survey for thermal
plume and 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.
The surveys for Units L9,
L10 and L11 were completed in July 2007, August 2021 and January 2023
respectively. The survey for Unit L12
was conducted in February/ March 2025 for dry season, and the wet season survey
is tentatively scheduled for July/ August 2025.
EPD
officials from Regional Office (South) visited Lamma Power Station on 25/6/2025. There was no adverse comment received from
EPD regarding the operation 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 June
2025 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 |
Event/Action Plan
Implementation Status and Results |
|
|
Action Level |
Limit Level |
||||
|
Air |
|||||
|
1 |
Stack NOx |
01/06/2025 30/06/2025 |
0 |
0 |
|
|
Noise |
|||||
|
1 |
Noise levels at the critical NSR at Hung Shing Ye calculated by the noise alarm monitoring system |
01/06/2025 30/06/2025 |
0 |
0 |
|
|
Water |
|||||
|
1 |
Cooling Water Temperature Rise |
01/06/2025 30/06/2025 |
0 |
0 |
|
|
2 |
Total Residual Chlorine |
01/06/2025 30/06/2025 |
0 |
0 |
|
|
3 |
Temperature of Blowdown Effluent |
01/06/2025 30/06/2025 |
N.A. |
N.A.* |
|
|
4 |
Suspended Solids from Blowdown Effluent |
01/06/2025 30/06/2025 |
N.A. |
N.A.* |
|
|
5 |
Grease & Oil from Blowdown Effluent |
01/06/2025 30/06/2025 |
N.A. |
N.A.* |
|
|
6 |
Inspection of Scum/Foam in ambient water |
01/06/2025 30/06/2025 |
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 Status of Environmental Licensing and Permitting
All
permits/licenses obtained as of
June 2025 are summarised in
Table
5.2.
Table 5.2 Summary
of Environmental Licensing and Permit Status
|
Description |
Permit / Licence No. |
Valid Period |
Status |
|
|
From |
To |
|||
|
Environmental Permit |
EP-071/2000/D |
28/09/2020 |
- |
Valid |
|
Specified Processes Licence
issued under APCO |
L-7-002(15) |
01/01/2025 |
31/12/2026 |
Valid |
|
WPCO Discharge Licence for L1-L12 |
WT10001965-2023 |
18/10/2024 |
30/11/2025 |
Valid |
5.4
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.
5.5
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.
5.6
Implementation
Status of Environmental Complaint Handling Procedures
In June 2025,
no complaint in relation to the environmental impact of the Project was
received.
Table 5.3 Environmental Complaints Received in June 2025
|
Case Reference / Date, Time Received / Date, Time Concerned |
Descriptions / Actions Taken |
Conclusion / Status |
|
Nil |
N/A |
N/A |
Table 5.4 Outstanding Environmental Complaints 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 plan in the coming three 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 in relation to the
environmental impact of 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
|
Unit L9 |
|||
|
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 |
|
Unit L10, Unit L11, Unit L12 |
|||
|
Parameter |
Frequency |
Action |
Limit |
|
Hourly
Average Stack NOx (Natural Gas) |
Continuous |
81
mg/Nm3 (Loading
≤ 182 MW) |
90
mg/Nm3 (Loading≤182
MW) |
|
13.5
mg/Nm3 (182MW
≤ Loading ≤ 266 MW) |
15
mg/Nm3 |
||
|
4.5
mg/Nm3 |
5
mg/Nm3 (Loading
≥ 266 MW) |
||
|
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 mg/L |
0.5 mg/L |
|
|
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 mg/L |
|
|
Grease & Oil |
At least twice per year, when the combined cycle unit is operating |
20 mg/L |
- |
20 mg/L |
|
|
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: June 2025
Monthly Summary
of Stack NOx
|
Date |
Daily Maximum Stack NOx
concentration (mg/Nm3)# |
|
1/6/2025 |
* |
|
2/6/2025 |
63 |
|
3/6/2025 |
66 |
|
4/6/2025 |
63 |
|
5/6/2025 |
71 |
|
6/6/2025 |
66 |
|
7/6/2025 |
65 |
|
8/6/2025 |
64 |
|
9/6/2025 |
63 |
|
10/6/2025 |
68 |
|
11/6/2025 |
65 |
|
12/6/2025 |
66 |
|
13/6/2025 |
63 |
|
14/6/2025 |
63 |
|
15/6/2025 |
* |
|
16/6/2025 |
60 |
|
17/6/2025 |
65 |
|
18/6/2025 |
63 |
|
19/6/2025 |
68 |
|
20/6/2025 |
66 |
|
21/6/2025 |
70 |
|
22/6/2025 |
69 |
|
23/6/2025 |
67 |
|
24/6/2025 |
69 |
|
25/6/2025 |
70 |
|
26/6/2025 |
68 |
|
27/6/2025 |
67 |
|
28/6/2025 |
65 |
|
29/6/2025 |
* |
|
30/6/2025 |
65 |
Note: # - Hourly average value. Expressed as at 0ºC, 101.325kPa, dry and
corrected to 15% O2 condition.
^ - The NOx concentration
exceeded action level due to low relative humidity.
* - Unit L9 was not on load.
Site: Lamma
Power Station – Unit L10
Month: June 2025
Monthly Summary
of Stack NOx
|
Date |
Daily Maximum Stack NOx
concentration (mg/Nm3)# |
|
1/6/2025 |
3 |
|
2/6/2025 |
3 |
|
3/6/2025 |
3 |
|
4/6/2025 |
3 |
|
5/6/2025 |
3 |
|
6/6/2025 |
4 |
|
7/6/2025 |
3 |
|
8/6/2025 |
3 |
|
9/6/2025 |
3 |
|
10/6/2025 |
3 |
|
11/6/2025 |
3 |
|
12/6/2025 |
3 |
|
13/6/2025 |
3 |
|
14/6/2025 |
3 |
|
15/6/2025 |
3 |
|
16/6/2025 |
3 |
|
17/6/2025 |
4 |
|
18/6/2025 |
3 |
|
19/6/2025 |
3 |
|
20/6/2025 |
3 |
|
21/6/2025 |
3 |
|
22/6/2025 |
3 |
|
23/6/2025 |
3 |
|
24/6/2025 |
3 |
|
25/6/2025 |
3 |
|
26/6/2025 |
3 |
|
27/6/2025 |
3 |
|
28/6/2025 |
3 |
|
29/6/2025 |
3 |
|
30/6/2025 |
3 |
The daily maximum stack NOx concentration complies
with the Action/Limit Level for all unit loading ranges.
Note: # - Hourly average value. Expressed as at 0ºC, 101.325kPa, dry and
corrected to 15% O2 condition.
* - Unit L10 was not on load.
^ - Unit L10 was operating
with loading less than 266 MW.
Site: Lamma
Power Station – Unit L11
Month: June 2025
Monthly Summary
of Stack NOx
|
Date |
Daily Maximum Stack NOx
concentration (mg/Nm3)# |
|
1/6/2025 |
3 |
|
2/6/2025 |
3 |
|
3/6/2025 |
3 |
|
4/6/2025 |
3 |
|
5/6/2025 |
3 |
|
6/6/2025 |
3 |
|
7/6/2025 |
4 |
|
8/6/2025 |
4 |
|
9/6/2025 |
3 |
|
10/6/2025 |
3 |
|
11/6/2025 |
3 |
|
12/6/2025 |
3 |
|
13/6/2025 |
3 |
|
14/6/2025 |
3 |
|
15/6/2025 |
3 |
|
16/6/2025 |
3 |
|
17/6/2025 |
4 |
|
18/6/2025 |
3 |
|
19/6/2025 |
3 |
|
20/6/2025 |
3 |
|
21/6/2025 |
3 |
|
22/6/2025 |
3 |
|
23/6/2025 |
3 |
|
24/6/2025 |
3 |
|
25/6/2025 |
3 |
|
26/6/2025 |
3 |
|
27/6/2025 |
3 |
|
28/6/2025 |
3 |
|
29/6/2025 |
3 |
|
30/6/2025 |
3 |
The daily maximum stack NOx concentration complies
with the Action/Limit Level for all unit loading ranges.
Note: # - Hourly average value. Expressed as at 0ºC, 101.325kPa, dry and
corrected to 15% O2 condition.
* - Unit L11 was not on load.
^ - Unit L11 was operating
with loading less than 266 MW.
Site: Lamma
Power Station – Unit L12
Month: June 2025
Monthly Summary
of Stack NOx
|
Date |
Daily Maximum Stack NOx
concentration (mg/Nm3)# |
|
1/6/2025 |
3 |
|
2/6/2025 |
3 |
|
3/6/2025 |
3 |
|
4/6/2025 |
3 |
|
5/6/2025 |
4 |
|
6/6/2025 |
3 |
|
7/6/2025 |
4 |
|
8/6/2025 |
3 |
|
9/6/2025 |
3 |
|
10/6/2025 |
3 |
|
11/6/2025 |
3 |
|
12/6/2025 |
3 |
|
13/6/2025 |
3 |
|
14/6/2025 |
3 |
|
15/6/2025 |
3 |
|
16/6/2025 |
3 |
|
17/6/2025 |
3 |
|
18/6/2025 |
3 |
|
19/6/2025 |
3 |
|
20/6/2025 |
3 |
|
21/6/2025 |
3 |
|
22/6/2025 |
3 |
|
23/6/2025 |
3 |
|
24/6/2025 |
3 |
|
25/6/2025 |
4 |
|
26/6/2025 |
3 |
|
27/6/2025 |
3 |
|
28/6/2025 |
3 |
|
29/6/2025 |
3 |
|
30/6/2025 |
3 |
The daily maximum stack NOx concentration complies
with the Action/Limit Level for all unit loading ranges.
Note: # - Hourly average value. Expressed as at 0ºC, 101.325kPa, dry and
corrected to 15% O2 condition.
* - Unit L12 was not on load.
^ - Unit L12 was operating
with loading less than 266 MW.
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)
|
Time |
Calculated Noise Level at NSR at Hung Shing Ye (dB(A)) |
Limit
Noise Level (dB(A)) |
||
|
Max |
Avg |
|||
|
07:00-23:00 |
50 |
47 |
60 |
|
|
01/06/2025 |
23:00-07:00 |
--- |
--- |
50 |
|
02/06/2025 |
07:00-23:00 |
49 |
46 |
60 |
|
02/06/2025 |
23:00-07:00 |
50 |
47 |
50 |
|
03/06/2025 |
07:00-23:00 |
55 |
50 |
60 |
|
03/06/2025 |
23:00-07:00 |
44 |
44 |
50 |
|
04/06/2025 |
07:00-23:00 |
45 |
42 |
60 |
|
04/06/2025 |
23:00-07:00 |
--- |
--- |
50 |
|
05/06/2025 |
07:00-23:00 |
45 |
44 |
60 |
|
05/06/2025 |
23:00-07:00 |
--- |
--- |
50 |
|
06/06/2025 |
07:00-23:00 |
54 |
48 |
60 |
|
06/06/2025 |
23:00-07:00 |
--- |
--- |
50 |
|
07/06/2025 |
07:00-23:00 |
53 |
51 |
60 |
|
07/06/2025 |
23:00-07:00 |
47 |
46 |
50 |
|
08/06/2025 |
07:00-23:00 |
51 |
49 |
60 |
|
08/06/2025 |
23:00-07:00 |
--- |
--- |
50 |
|
09/06/2025 |
07:00-23:00 |
48 |
46 |
60 |
|
09/06/2025 |
23:00-07:00 |
--- |
--- |
50 |
|
10/06/2025 |
07:00-23:00 |
59 |
57 |
60 |
|
10/06/2025 |
23:00-07:00 |
47 |
47 |
50 |
|
11/06/2025 |
07:00-23:00 |
41 |
40 |
60 |
|
11/06/2025 |
23:00-07:00 |
40 |
39 |
50 |
|
12/06/2025 |
07:00-23:00 |
57 |
53 |
60 |
|
12/06/2025 |
23:00-07:00 |
49 |
45 |
50 |
|
13/06/2025 |
07:00-23:00 |
50 |
45 |
60 |
|
13/06/2025 |
23:00-07:00 |
23 |
23 |
50 |
|
14/06/2025 |
07:00-23:00 |
--- |
--- |
60 |
|
14/06/2025 |
23:00-07:00 |
--- |
--- |
50 |
|
15/06/2025 |
07:00-23:00 |
--- |
--- |
60 |
|
15/06/2025 |
23:00-07:00 |
48 |
48 |
50 |
|
16/06/2025 |
07:00-23:00 |
53 |
52 |
60 |
|
16/06/2025 |
23:00-07:00 |
--- |
--- |
50 |
|
17/06/2025 |
07:00-23:00 |
48 |
48 |
60 |
|
17/06/2025 |
23:00-07:00 |
--- |
--- |
50 |
|
18/06/2025 |
07:00-23:00 |
49 |
45 |
60 |
|
18/06/2025 |
23:00-07:00 |
--- |
--- |
50 |
|
19/06/2025 |
07:00-23:00 |
43 |
41 |
60 |
|
19/06/2025 |
23:00-07:00 |
--- |
--- |
50 |
|
20/06/2025 |
07:00-23:00 |
52 |
51 |
60 |
|
20/06/2025 |
23:00-07:00 |
--- |
--- |
50 |
|
21/06/2025 |
07:00-23:00 |
38 |
36 |
60 |
|
21/06/2025 |
23:00-07:00 |
--- |
--- |
50 |
|
22/06/2025 |
07:00-23:00 |
47 |
45 |
60 |
|
22/06/2025 |
23:00-07:00 |
47 |
47 |
50 |
|
23/06/2025 |
07:00-23:00 |
51 |
47 |
60 |
|
23/06/2025 |
23:00-07:00 |
49 |
49 |
50 |
|
24/06/2025 |
07:00-23:00 |
54 |
48 |
60 |
|
24/06/2025 |
23:00-07:00 |
50 |
50 |
50 |
|
25/06/2025 |
07:00-23:00 |
52 |
48 |
60 |
|
25/06/2025 |
23:00-07:00 |
50 |
50 |
50 |
|
26/06/2025 |
07:00-23:00 |
46 |
44 |
60 |
|
26/06/2025 |
23:00-07:00 |
--- |
--- |
50 |
|
27/06/2025 |
07:00-23:00 |
53 |
49 |
60 |
|
27/06/2025 |
23:00-07:00 |
48 |
46 |
50 |
|
28/06/2025 |
07:00-23:00 |
43 |
40 |
60 |
|
28/06/2025 |
23:00-07:00 |
--- |
--- |
50 |
|
29/06/2025 |
07:00-23:00 |
56 |
49 |
60 |
|
29/06/2025 |
23:00-07:00 |
36 |
34 |
50 |
|
30/06/2025 |
07:00-23:00 |
50 |
47 |
60 |
|
30/06/2025 |
23:00-07:00 |
--- |
--- |
50 |
Note: 1. “---“represents the measured noise
monitoring data lower than the established notional background level/discarded under strong wind/ bird sound.
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 monitoring 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 Units L9, L10 & L11
Weighted by Flowrates of Individual Streams
(June 2025)
|
Date |
Maximum Outlet Temperature Rise (Deg. Celsius) |
|
1/6/2025 |
6.2 |
|
2/6/2025 |
6.4 |
|
3/6/2025 |
6.4 |
|
4/6/2025 |
6.3 |
|
5/6/2025 |
6.5 |
|
6/6/2025 |
6.8 |
|
7/6/2025 |
6.1 |
|
8/6/2025 |
6.1 |
|
9/6/2025 |
6.3 |
|
10/6/2025 |
6.6 |
|
11/6/2025 |
6.5 |
|
12/6/2025 |
6.2 |
|
13/6/2025 |
6.4 |
|
14/6/2025 |
6.0 |
|
15/6/2025 |
5.9 |
|
16/6/2025 |
6.1 |
|
17/6/2025 |
6.8 |
|
18/6/2025 |
6.9 |
|
19/6/2025 |
6.9 |
|
20/6/2025 |
6.9 |
|
21/6/2025 |
6.8 |
|
22/6/2025 |
6.0 |
|
23/6/2025 |
6.9 |
|
24/6/2025 |
6.9 |
|
25/6/2025 |
6.6 |
|
26/6/2025 |
6.9 |
|
27/6/2025 |
6.9 |
|
28/6/2025 |
6.8 |
|
29/6/2025 |
6.2 |
|
30/6/2025 |
6.9 |
Maximum Outlet Temperature Rise (Deg.
Celsius) of Cooling Water at C.W. Outfall No.4 Serving Unit L12
Weighted by Flowrates of Individual Streams
(June 2025)
|
Date |
Maximum Outlet Temperature Rise (Deg. Celsius) |
|
1/6/2025 |
6.1 |
|
2/6/2025 |
6.8 |
|
3/6/2025 |
6.7 |
|
4/6/2025 |
6.6 |
|
5/6/2025 |
6.7 |
|
6/6/2025 |
6.7 |
|
7/6/2025 |
5.6 |
|
8/6/2025 |
6.0 |
|
9/6/2025 |
6.5 |
|
10/6/2025 |
6.8 |
|
11/6/2025 |
6.8 |
|
12/6/2025 |
6.6 |
|
13/6/2025 |
6.7 |
|
14/6/2025 |
6.4 |
|
15/6/2025 |
6.3 |
|
16/6/2025 |
6.8 |
|
17/6/2025 |
6.7 |
|
18/6/2025 |
6.8 |
|
19/6/2025 |
6.8 |
|
20/6/2025 |
6.7 |
|
21/6/2025 |
6.8 |
|
22/6/2025 |
6.5 |
|
23/6/2025 |
6.8 |
|
24/6/2025 |
6.8 |
|
25/6/2025 |
6.8 |
|
26/6/2025 |
6.8 |
|
27/6/2025 |
6.7 |
|
28/6/2025 |
6.7 |
|
29/6/2025 |
6.2 |
|
30/6/2025 |
6.7 |
Total Residual Chlorine Level at C.W. Outfall No. 3 Serving
Units L9, L10 & L11 (June 2025)
|
Date of sampling |
06/06 |
20/06 |
|
Total Residual
Chlorine, mg/L |
0.40 |
0.20 |
Total Residual Chlorine Level at C.W. Outfall No. 4 Serving
Unit L12 (June 2025)
|
Date of sampling |
06/06 |
20/06 |
|
Total Residual
Chlorine, mg/L |
0.20 |
0.10 |
Blowdown from Units L9, L10 and L11 Steam Turbine and
HRSG to C.W. Outfall No. 3 (June 2025)
|
Source of discharge |
Unit L9 HSRG |
Unit L9 Steam Turbine |
Unit L10 HSRG |
Unit L10 Steam Turbine |
Unit L11 HSRG |
Unit L11 Steam Turbine |
|
Date of sampling |
# |
# |
# |
# |
# |
# |
|
Suspended Solid, mg/L |
# |
# |
# |
# |
# |
# |
|
Grease & Oil,
mg/L |
# |
# |
# |
# |
# |
# |
|
Temperature, Deg.
Celsius |
# |
# |
# |
# |
# |
# |
Note: #
Monitoring was not scheduled in the reporting month. The last monitoring was
conducted for Unit L9 in April 2025, and for Units L10 and L11 in February
2025.
Blowdown from Unit L2 Steam Turbine and HRSG to C.W.
Outfall No. 4 (June 2025)
|
Source of discharge |
Unit L12 HSRG |
Unit L12 Steam Turbine |
|
Date of sampling |
# |
# |
|
Suspended Solid, mg/L |
# |
# |
|
Grease & Oil,
mg/L |
# |
# |
|
Temperature, Deg.
Celsius |
# |
# |
Note: #
Monitoring was not scheduled in the reporting month. The last monitoring was
conducted in April 2025.
Observation of Scum Formation in Marine Waters Mixing
Zone at Lamma Power Station Extension (June 2025)
|
Date |
Observation |
|
1/6/2025 |
No scum within
500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW
Outfall and defoamer added to Outfall No.4 |
|
2/6/2025 |
No scum within 500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW Outfall and defoamer added to Outfall No.4 |
|
3/6/2025 |
No scum within
500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW
Outfall and defoamer added to Outfall No.4 |
|
4/6/2025 |
No scum within 500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW Outfall and defoamer added to Outfall No.4 |
|
5/6/2025 |
No scum within 500m of HSY Beach & NW/SW corner of the Station & CW Outfall |
|
6/6/2025 |
No scum within 500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW Outfall and defoamer added to Outfalls No.3 & No.4 |
|
7/6/2025 |
No scum within 500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW Outfall and defoamer added to Outfalls No.3 & No.4 |
|
8/6/2025 |
No scum within
500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW
Outfall and defoamer added to Outfalls No.3 & No.4 |
|
9/6/2025 |
No scum within
500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW
Outfall and defoamer added to Outfalls No.3 & No.4 |
|
10/6/2025 |
No scum within
500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW
Outfall and defoamer added to Outfalls No.3 & No.4 |
|
11/6/2025 |
No scum within 500m of HSY Beach & NW/SW corner of the Station & CW Outfall |
|
12/6/2025 |
No scum within
500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW
Outfall and defoamer added to Outfalls No.3 & No.4 |
|
13/6/2025 |
No scum within
500m of HSY Beach & NW/SW corner of the Station & CW Outfall |
|
14/6/2025 |
No scum within
500m of HSY Beach & NW/SW corner of the Station & CW Outfall |
|
15/6/2025 |
No scum within
500m of HSY Beach & NW/SW corner of the Station & CW Outfall |
|
16/6/2025 |
No scum within 500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW Outfall and defoamer added to Outfalls No.3 & No.4 |
|
17/6/2025 |
No scum within 500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW Outfall and defoamer added to Outfalls No.3 & No.4 |
|
18/6/2025 |
No scum within 500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW Outfall and defoamer added to Outfalls No.3 & No.4 |
|
19/6/2025 |
No scum within
500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW
Outfall and defoamer added to Outfalls No.3 & No.4 |
|
20/6/2025 |
No scum within
500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW
Outfall and defoamer added to Outfalls No.3 & No.4 |
|
21/6/2025 |
No scum within 500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW Outfall and defoamer added to Outfalls No.3 & No.4 |
|
22/6/2025 |
No scum within
500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW
Outfall and defoamer added to Outfalls No.3 & No.4 |
|
23/6/2025 |
No scum within 500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW Outfall, dispersed by ferry and defoamer added to Outfalls No.3 & No.4 |
|
24/6/2025 |
No scum within
500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW
Outfall and defoamer added to Outfalls No.3 & No.4 |
|
25/6/2025 |
No scum within
500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW
Outfall and defoamer added to Outfalls No.3 & No.4 |
|
26/6/2025 |
No scum within
500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW
Outfall and defoamer added to Outfalls No.3 & No.4 |
|
27/6/2025 |
No scum within
500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW
Outfall and defoamer added to Outfalls No.3 & No.4 |
|
28/6/2025 |
No scum within
500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW
Outfall and defoamer added to Outfall No.4 |
|
29/6/2025 |
No scum within 500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW Outfall and defoamer added to Outfalls No.3 & No.4 |
|
30/6/2025 |
No scum within
500m of HSY Beach & NW/SW corner of the Station; Some foam outside CW
Outfall and defoamer added to Outfalls No.3 & No.4 |
Note: The water spraying system at C.W. Outfall No.1 was put in service from
1 to 5/6/2025.
|
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 |
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Water Quality |
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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 |
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Noise |
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C1 |
HK Electric shall implement the gas-fired units for based-load operation to minimize the noise generated from the existing units. |
Complied |
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Landscape & Visual impacts |
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D1 |
No mitigation measures were considered necessary. |
N/A |
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EM&A Log Ref. |
Mitigation Measures |
Implementation Status |
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LAND CONTAMINATION AND WASTE MANAGEMENT |
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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. |
Complied |
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Marine Ecology |
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F1 |
No mitigation measures were considered necessary. |
N/A |
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fisheries |
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G1 |
No mitigation measures were considered necessary. |
N/A |
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RISK ASSESSMENT |
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H1 |
No mitigation measures were considered necessary. |
N/A |