Table of Content
1.2 Summary of EM&A Requirements
1.3 Improvement Works for Lamma Extension
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 August 2011
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 fifty-ninth 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 August 2011.
Air quality,
noise and water quality monitoring were performed.
The results were checked against the established Action/Limit
(AL) levels. The implementation status of the environmental
mitigation measures, Event/Action
Plan and environmental complaint handling procedures were also checked.
Plant
Availability
Unit L9 was out of service during the following period:
|
Period |
Remark |
|
03/08/2011 19:51 to 04/08/2011 12:15 |
Defect rectification |
Improvement Works for Lamma Extension
Civil
works for construction of the maintenance building 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 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 August 2011.
Unit L9 was out
of service during the following period:
|
Period |
Remark |
|
03/08/2011 19:51 to 04/08/2011 12:15 |
Defect rectification |
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.
1.3 Improvement Works for Lamma Extension
Civil works for construction of the maintenance building at Lamma Extension were carried out in the reporting month.
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.
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 August 2011 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 |
01/08/11-31/08/11 |
0 |
0 |
|
|
Noise |
|||||
|
1 |
Noise levels at the critical NSR at Hung Shing Ye calculated by the noise alarm monitoring system |
01/08/11-31/08/11 |
0 |
0 |
|
|
Water |
|||||
|
1 |
Cooling Water Temperature Rise |
01/08/11-31/08/11 |
0 |
0 |
|
|
2 |
Total Residual Chlorine |
01/08/11-31/08/11 |
0 |
0 |
|
|
3 |
Temperature of Blowdown Effluent |
01/08/11-31/08/11 |
N.A. |
N.A.* |
|
|
4 |
Suspended Solids from Blowdown Effluent |
01/08/11-31/08/11 |
N.A. |
N.A.* |
|
|
5 |
Grease & Oil from Blowdown Effluent |
01/08/11-31/08/11 |
N.A. |
N.A.* |
|
|
6 |
Inspection of Scum/Foam in ambient water |
01/08/11-31/08/11 |
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 August 2011,
no complaint against the Project
was received.
Table 5.2 Environmental
Complaints / Enquiries Received in August 2011
|
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 in 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: August 2011
Monthly Summary of
Stack NOx
|
Date |
Daily
Maximum Stack NOx concentration (mg/Nm3)# |
|
1/8/2011 |
55 |
|
2/8/2011 |
53 |
|
3/8/2011 |
56 |
|
4/8/2011 |
54 |
|
5/8/2011 |
53 |
|
6/8/2011 |
54 |
|
7/8/2011 |
52 |
|
8/8/2011 |
54 |
|
9/8/2011 |
55 |
|
10/8/2011 |
54 |
|
11/8/2011 |
56 |
|
12/8/2011 |
54 |
|
13/8/2011 |
54 |
|
14/8/2011 |
53 |
|
15/8/2011 |
54 |
|
16/8/2011 |
56 |
|
17/8/2011 |
57 |
|
18/8/2011 |
57 |
|
19/8/2011 |
58 |
|
20/8/2011 |
59 |
|
21/8/2011 |
57 |
|
22/8/2011 |
56 |
|
23/8/2011 |
57 |
|
24/8/2011 |
57 |
|
25/8/2011 |
57 |
|
26/8/2011 |
58 |
|
27/8/2011 |
59 |
|
28/8/2011 |
58 |
|
29/8/2011 |
55 |
|
30/8/2011 |
55 |
|
31/8/2011 |
56 |
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 |
|||
|
01/08/2011 |
07:00-23:00 |
--- |
--- |
60 |
|
01/08/2011 |
23:00-07:00 |
33 |
31 |
50 |
|
02/08/2011 |
07:00-23:00 |
--- |
--- |
60 |
|
02/08/2011 |
23:00-07:00 |
35 |
29 |
50 |
|
03/08/2011 |
07:00-23:00 |
--- |
--- |
60 |
|
03/08/2011 |
23:00-07:00 |
41 |
35 |
50 |
|
04/08/2011 |
07:00-23:00 |
--- |
--- |
60 |
|
04/08/2011 |
23:00-07:00 |
--- |
--- |
50 |
|
05/08/2011 |
07:00-23:00 |
--- |
--- |
60 |
|
05/08/2011 |
23:00-07:00 |
--- |
--- |
50 |
|
06/08/2011 |
07:00-23:00 |
40 |
40 |
60 |
|
06/08/2011 |
23:00-07:00 |
--- |
--- |
50 |
|
07/08/2011 |
07:00-23:00 |
34 |
34 |
60 |
|
07/08/2011 |
23:00-07:00 |
44 |
43 |
50 |
|
08/08/2011 |
07:00-23:00 |
38 |
38 |
60 |
|
08/08/2011 |
23:00-07:00 |
--- |
--- |
50 |
|
09/08/2011 |
07:00-23:00 |
--- |
--- |
60 |
|
09/08/2011 |
23:00-07:00 |
37 |
36 |
50 |
|
10/08/2011 |
07:00-23:00 |
37 |
37 |
60 |
|
10/08/2011 |
23:00-07:00 |
34 |
34 |
50 |
|
11/08/2011 |
07:00-23:00 |
--- |
--- |
60 |
|
11/08/2011 |
23:00-07:00 |
26 |
26 |
50 |
|
12/08/2011 |
07:00-23:00 |
--- |
--- |
60 |
|
12/08/2011 |
23:00-07:00 |
15 |
15 |
50 |
|
13/08/2011 |
07:00-23:00 |
44 |
42 |
60 |
|
13/08/2011 |
23:00-07:00 |
--- |
--- |
50 |
|
14/08/2011 |
07:00-23:00 |
--- |
--- |
60 |
|
14/08/2011 |
23:00-07:00 |
--- |
--- |
50 |
|
15/08/2011 |
07:00-23:00 |
--- |
--- |
60 |
|
15/08/2011 |
23:00-07:00 |
--- |
--- |
50 |
|
16/08/2011 |
07:00-23:00 |
--- |
--- |
60 |
|
16/08/2011 |
23:00-07:00 |
--- |
--- |
50 |
|
17/08/2011 |
07:00-23:00 |
29 |
29 |
60 |
|
17/08/2011 |
23:00-07:00 |
19 |
19 |
50 |
|
18/08/2011 |
07:00-23:00 |
--- |
--- |
60 |
|
18/08/2011 |
23:00-07:00 |
39 |
36 |
50 |
|
19/08/2011 |
07:00-23:00 |
45 |
41 |
60 |
|
19/08/2011 |
23:00-07:00 |
29 |
29 |
50 |
|
20/08/2011 |
07:00-23:00 |
46 |
43 |
60 |
|
20/08/2011 |
23:00-07:00 |
27 |
26 |
50 |
|
21/08/2011 |
07:00-23:00 |
--- |
--- |
60 |
|
21/08/2011 |
23:00-07:00 |
--- |
--- |
50 |
|
22/08/2011 |
07:00-23:00 |
--- |
--- |
60 |
|
22/08/2011 |
23:00-07:00 |
26 |
25 |
50 |
|
23/08/2011 |
07:00-23:00 |
49 |
44 |
60 |
|
23/08/2011 |
23:00-07:00 |
--- |
--- |
50 |
|
24/08/2011 |
07:00-23:00 |
45 |
41 |
60 |
|
24/08/2011 |
23:00-07:00 |
25 |
24 |
50 |
|
25/08/2011 |
07:00-23:00 |
49 |
45 |
60 |
|
25/08/2011 |
23:00-07:00 |
--- |
--- |
50 |
|
26/08/2011 |
07:00-23:00 |
36 |
34 |
60 |
|
26/08/2011 |
23:00-07:00 |
--- |
--- |
50 |
|
27/08/2011 |
07:00-23:00 |
42 |
40 |
60 |
|
27/08/2011 |
23:00-07:00 |
--- |
--- |
50 |
|
28/08/2011 |
07:00-23:00 |
--- |
--- |
60 |
|
28/08/2011 |
23:00-07:00 |
--- |
--- |
50 |
|
29/08/2011 |
07:00-23:00 |
50 |
43 |
60 |
|
29/08/2011 |
23:00-07:00 |
39 |
35 |
50 |
|
30/08/2011 |
07:00-23:00 |
44 |
41 |
60 |
|
30/08/2011 |
23:00-07:00 |
39 |
35 |
50 |
|
31/08/2011 |
07:00-23:00 |
50 |
47 |
60 |
|
31/08/2011 |
23:00-07:00 |
38 |
33 |
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 (August 2011)
|
Date |
Maximum
Outlet Temperature Rise (Deg.
Celsius) |
|
1/8/2011 |
8.5 |
|
2/8/2011 |
8.5 |
|
3/8/2011 |
8.4 |
|
4/8/2011 |
8.1 |
|
5/8/2011 |
8.1 |
|
6/8/2011 |
8.1 |
|
7/8/2011 |
7.6 |
|
8/8/2011 |
8.1 |
|
9/8/2011 |
8.1 |
|
10/8/2011 |
8.1 |
|
11/8/2011 |
8.5 |
|
12/8/2011 |
8.1 |
|
13/8/2011 |
8.1 |
|
14/8/2011 |
8.1 |
|
15/8/2011 |
8.5 |
|
16/8/2011 |
8.2 |
|
17/8/2011 |
8.2 |
|
18/8/2011 |
8.2 |
|
19/8/2011 |
8.2 |
|
20/8/2011 |
8.7 |
|
21/8/2011 |
8.8 |
|
22/8/2011 |
9.2 |
|
23/8/2011 |
8.8 |
|
24/8/2011 |
8.7 |
|
25/8/2011 |
8.7 |
|
26/8/2011 |
8.7 |
|
27/8/2011 |
9.2 |
|
28/8/2011 |
8.2 |
|
29/8/2011 |
8.8 |
|
30/8/2011 |
8.8 |
|
31/8/2011 |
8.8 |
Total
Residual Chlorine Level at C.W. Outfall No. 3 (August 2011)
|
Date of sampling |
10/08/2011 |
24/08/2011 |
|
Total Residual
Chlorine, mg/L |
0.40 |
0.40 |
Blowdown from Unit L9 Steam
Turbine and HRSG to C.W. Outfall No. 3 (August 2011)
|
Source of Discharge |
HSRG |
Steam Turbine |
|
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 2011.
Observation of Scum
Formation in Marine Waters Mixing Zone at Lamma Power Station Extension (August 2011)
|
Date |
Observation |
|
1/8/2011 |
No scum within 500m of
HSY Beach, NW/SW corner of the Station & CW Outfall |
|
2/8/2011 |
No scum within 500m of
HSY Beach, NW/SW corner of the Station & CW Outfall |
|
3/8/2011 |
No scum within 500m of
HSY Beach, NW/SW corner of the Station & CW Outfall |
|
4/8/2011 |
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 |
|
5/8/2011 |
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 |
|
6/8/2011 |
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.1 & No.2 |
|
7/8/2011 |
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 |
|
8/8/2011 |
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 |
|
9/8/2011 |
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 |
|
10/8/2011 |
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 |
|
11/8/2011 |
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 |
|
12/8/2011 |
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.1 & No.2 |
|
13/8/2011 |
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 |
|
14/8/2011 |
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 |
|
15/8/2011 |
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 |
|
16/8/2011 |
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 |
|
17/8/2011 |
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 |
|
18/8/2011 |
No scum within 500m of
HSY Beach, NW/SW corner of the Station & CW Outfall |
|
19/8/2011 |
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 |
|
20/8/2011 |
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 |
|
21/8/2011 |
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 |
|
22/8/2011 |
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 |
|
23/8/2011 |
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.1 & No.2 |
|
24/8/2011 |
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 |
|
25/8/2011 |
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 |
|
26/8/2011 |
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 |
|
27/8/2011 |
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 |
|
28/8/2011 |
No scum within 500m of
HSY Beach, NW/SW corner of the Station & CW Outfall |
|
29/8/2011 |
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 |
|
30/8/2011 |
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 |
|
31/8/2011 |
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 was in service in the
reporting month.
|
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 |