Table
of Content
1.2 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 Received in April 2018
Table
5.3 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
EXECUTIVE
SUMMARY
This is the 139th
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 April 2018.
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 fully available 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 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/C, 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 April 2018.
Unit L9 was fully available in the reporting month.
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 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 |
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 next on-site calibration is scheduled in
September 2018. 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-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.
5.
ENVIRONMENTAL
AUDIT
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 April 2018
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 |
01/04/18 30/04/18 |
0 |
0 |
|
|
Noise |
|||||
|
1 |
Noise levels at the critical NSR at Hung Shing Ye calculated by the noise alarm monitoring system |
01/04/18 30/04/18 |
0 |
0 |
|
|
Water |
|||||
|
1 |
Cooling Water Temperature Rise |
01/04/18 30/04/18 |
0 |
0 |
|
|
2 |
Total Residual Chlorine |
01/04/18 30/04/18 |
0 |
0 |
|
|
3 |
Temperature of Blowdown Effluent |
01/04/18 30/04/18 |
N.A. |
N.A.* |
|
|
4 |
Suspended Solids from Blowdown Effluent |
01/04/18 30/04/18 |
N.A. |
N.A.* |
|
|
5 |
Grease & Oil from Blowdown Effluent |
01/04/18 30/04/18 |
N.A. |
N.A.* |
|
|
6 |
Inspection of Scum/Foam in ambient water |
01/04/18 30/04/18 |
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 April 2018, no
complaint against the Project was received.
Table 5.2 Environmental Complaints Received in April 2018
|
Case Reference / Date, Time Received / Date, Time Concerned |
Descriptions / Actions Taken |
Conclusion / Status |
|
Nil |
N/A |
N/A |
Table 5.3 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 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 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: April
2018
Monthly
Summary of Stack NOx
|
Date |
Daily Maximum
Stack NOx concentration (mg/Nm3)# |
|
1/4/2018 |
58 |
|
2/4/2018 |
55 |
|
3/4/2018 |
55 |
|
4/4/2018 |
56 |
|
5/4/2018 |
57 |
|
6/4/2018 |
65 |
|
7/4/2018 |
72 |
|
8/4/2018 |
70 |
|
9/4/2018 |
62 |
|
10/4/2018 |
59 |
|
11/4/2018 |
54 |
|
12/4/2018 |
51 |
|
13/4/2018 |
53 |
|
14/4/2018 |
53 |
|
15/4/2018 |
58 |
|
16/4/2018 |
59 |
|
17/4/2018 |
60 |
|
18/4/2018 |
64 |
|
19/4/2018 |
64 |
|
20/4/2018 |
54 |
|
21/4/2018 |
53 |
|
22/4/2018 |
53 |
|
23/4/2018 |
51 |
|
24/4/2018 |
52 |
|
25/4/2018 |
55 |
|
26/4/2018 |
53 |
|
27/4/2018 |
54 |
|
28/4/2018 |
52 |
|
29/4/2018 |
52 |
|
30/4/2018 |
51 |
Note: # - Hourly
average value. Expressed
as at 0ºC, 101.325kPa, dry and corrected to 15% O2 condition.
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 |
|||
|
01/04/2018 |
07:00-23:00 |
36 |
36 |
60 |
|
01/04/2018 |
23:00-07:00 |
33 |
33 |
50 |
|
02/04/2018 |
07:00-23:00 |
45 |
43 |
60 |
|
02/04/2018 |
23:00-07:00 |
38 |
35 |
50 |
|
03/04/2018 |
07:00-23:00 |
57 |
57 |
60 |
|
03/04/2018 |
23:00-07:00 |
28 |
28 |
50 |
|
04/04/2018 |
07:00-23:00 |
52 |
52 |
60 |
|
04/04/2018 |
23:00-07:00 |
45 |
42 |
50 |
|
05/04/2018 |
07:00-23:00 |
48 |
46 |
60 |
|
05/04/2018 |
23:00-07:00 |
40 |
40 |
50 |
|
06/04/2018 |
07:00-23:00 |
43 |
41 |
60 |
|
06/04/2018 |
23:00-07:00 |
46 |
44 |
50 |
|
07/04/2018 |
07:00-23:00 |
45 |
45 |
60 |
|
07/04/2018 |
23:00-07:00 |
--- |
--- |
50 |
|
08/04/2018 |
07:00-23:00 |
50 |
45 |
60 |
|
08/04/2018 |
23:00-07:00 |
50 |
48 |
50 |
|
09/04/2018 |
07:00-23:00 |
--- |
--- |
60 |
|
09/04/2018 |
23:00-07:00 |
36 |
34 |
50 |
|
10/04/2018 |
07:00-23:00 |
53 |
49 |
60 |
|
10/04/2018 |
23:00-07:00 |
48 |
45 |
50 |
|
11/04/2018 |
07:00-23:00 |
--- |
--- |
60 |
|
11/04/2018 |
23:00-07:00 |
45 |
42 |
50 |
|
12/04/2018 |
07:00-23:00 |
47 |
47 |
60 |
|
12/04/2018 |
23:00-07:00 |
50 |
46 |
50 |
|
13/04/2018 |
07:00-23:00 |
55 |
55 |
60 |
|
13/04/2018 |
23:00-07:00 |
--- |
--- |
50 |
|
14/04/2018 |
07:00-23:00 |
--- |
--- |
60 |
|
14/04/2018 |
23:00-07:00 |
46 |
46 |
50 |
|
15/04/2018 |
07:00-23:00 |
47 |
44 |
60 |
|
15/04/2018 |
23:00-07:00 |
46 |
44 |
50 |
|
16/04/2018 |
07:00-23:00 |
32 |
32 |
60 |
|
16/04/2018 |
23:00-07:00 |
43 |
43 |
50 |
|
17/04/2018 |
07:00-23:00 |
55 |
51 |
60 |
|
17/04/2018 |
23:00-07:00 |
--- |
--- |
50 |
|
18/04/2018 |
07:00-23:00 |
27 |
27 |
60 |
|
18/04/2018 |
23:00-07:00 |
--- |
--- |
50 |
|
19/04/2018 |
07:00-23:00 |
--- |
--- |
60 |
|
19/04/2018 |
23:00-07:00 |
45 |
45 |
50 |
|
20/04/2018 |
07:00-23:00 |
37 |
37 |
60 |
|
20/04/2018 |
23:00-07:00 |
40 |
37 |
50 |
|
21/04/2018 |
07:00-23:00 |
--- |
--- |
60 |
|
21/04/2018 |
23:00-07:00 |
45 |
41 |
50 |
|
22/04/2018 |
07:00-23:00 |
42 |
42 |
60 |
|
22/04/2018 |
23:00-07:00 |
--- |
--- |
50 |
|
23/04/2018 |
07:00-23:00 |
--- |
--- |
60 |
|
23/04/2018 |
23:00-07:00 |
--- |
--- |
50 |
|
24/04/2018 |
07:00-23:00 |
--- |
--- |
60 |
|
24/04/2018 |
23:00-07:00 |
--- |
--- |
50 |
|
25/04/2018 |
07:00-23:00 |
--- |
--- |
60 |
|
25/04/2018 |
23:00-07:00 |
33 |
33 |
50 |
|
26/04/2018 |
07:00-23:00 |
--- |
--- |
60 |
|
26/04/2018 |
23:00-07:00 |
--- |
--- |
50 |
|
27/04/2018 |
07:00-23:00 |
34 |
34 |
60 |
|
27/04/2018 |
23:00-07:00 |
50 |
48 |
50 |
|
28/04/2018 |
07:00-23:00 |
46 |
46 |
60 |
|
28/04/2018 |
23:00-07:00 |
29 |
29 |
50 |
|
29/04/2018 |
07:00-23:00 |
53 |
53 |
60 |
|
29/04/2018 |
23:00-07:00 |
46 |
44 |
50 |
|
30/04/2018 |
07:00-23:00 |
35 |
35 |
60 |
|
30/04/2018 |
23:00-07:00 |
--- |
--- |
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 (April
2018)
|
Date |
Maximum Outlet Temperature Rise (Deg. Celsius) |
|
1/4/2018 |
8.1 |
|
2/4/2018 |
8.1 |
|
3/4/2018 |
8.0 |
|
4/4/2018 |
8.1 |
|
5/4/2018 |
8.0 |
|
6/4/2018 |
8.0 |
|
7/4/2018 |
8.0 |
|
8/4/2018 |
8.1 |
|
9/4/2018 |
8.1 |
|
10/4/2018 |
8.1 |
|
11/4/2018 |
8.0 |
|
12/4/2018 |
8.0 |
|
13/4/2018 |
8.1 |
|
14/4/2018 |
8.1 |
|
15/4/2018 |
8.0 |
|
16/4/2018 |
8.0 |
|
17/4/2018 |
8.0 |
|
18/4/2018 |
8.4 |
|
19/4/2018 |
8.3 |
|
20/4/2018 |
7.9 |
|
21/4/2018 |
8.0 |
|
22/4/2018 |
8.0 |
|
23/4/2018 |
8.0 |
|
24/4/2018 |
7.9 |
|
25/4/2018 |
7.9 |
|
26/4/2018 |
7.9 |
|
27/4/2018 |
8.0 |
|
28/4/2018 |
7.9 |
|
29/4/2018 |
8.0 |
|
30/4/2018 |
8.1 |
Total Residual Chlorine Level at C.W. Outfall No. 3 (April 2018)
|
Date of sampling |
13/04/2018 |
26/04/2018 |
|
Total
Residual Chlorine, mg/L |
0.35 |
0.35 |
Blowdown from Unit L9 Steam Turbine and HRSG to C.W. Outfall No. 3
(April 2018)
|
Source of discharge |
HSRG |
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 carried
out in March 2018.
Observation of Scum Formation in Marine Waters Mixing Zone at Lamma
Power Station Extension (April 2018)
|
Date |
Observation |
|
1/4/2018 |
No scum within 500m of HSY
Beach & NW/SW corner of the Station & CW Outfall |
|
2/4/2018 |
No scum within 500m of HSY
Beach & NW/SW corner of the Station & CW Outfall |
|
3/4/2018 |
No scum within 500m of HSY
Beach & NW/SW corner of the Station & CW Outfall |
|
4/4/2018 |
No scum within 500m of HSY
Beach & NW/SW corner of the Station & CW Outfall |
|
5/4/2018 |
No scum within 500m of HSY
Beach & NW/SW corner of the Station & CW Outfall |
|
6/4/2018 |
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 |
|
7/4/2018 |
No scum within 500m of HSY
Beach & NW/SW corner of the Station & CW Outfall |
|
8/4/2018 |
No scum within 500m of HSY
Beach & NW/SW corner of the Station & CW Outfall |
|
9/4/2018 |
No scum within 500m of HSY
Beach & NW/SW corner of the Station & CW Outfall |
|
10/4/2018 |
No scum within 500m of HSY
Beach & NW/SW corner of the Station & CW Outfall |
|
11/4/2018 |
No scum within 500m of HSY
Beach & NW/SW corner of the Station & CW Outfall |
|
12/4/2018 |
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 |
|
13/4/2018 |
No scum within 500m of HSY
Beach & NW/SW corner of the Station & CW Outfall |
|
14/4/2018 |
No scum within 500m of HSY
Beach & NW/SW corner of the Station & CW Outfall |
|
15/4/2018 |
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 |
|
16/4/2018 |
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 |
|
17/4/2018 |
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 |
|
18/4/2018 |
No scum within 500m of HSY
Beach & NW/SW corner of the Station & CW Outfall |
|
19/4/2018 |
No scum within 500m of HSY
Beach & NW/SW corner of the Station & CW Outfall |
|
20/4/2018 |
No scum within 500m of HSY
Beach & NW/SW corner of the Station & CW Outfall |
|
21/4/2018 |
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 |
|
22/4/2018 |
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 |
|
23/4/2018 |
No scum within 500m of HSY
Beach & NW/SW corner of the Station & CW Outfall |
|
24/4/2018 |
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 |
|
25/4/2018 |
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 |
|
26/4/2018 |
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 |
|
27/4/2018 |
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 |
|
28/4/2018 |
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 |
|
29/4/2018 |
No scum within 500m of HSY
Beach & NW/SW corner of the Station & CW Outfall |
|
30/4/2018 |
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 |
Note: The
water spraying system at C.W. Outfall No.1 was in service from 1 to 30/4/2018.
|
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. |
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 |