Table of Content
1.3 Summary of EM&A
Requirements
2.2 Summary of Results And Observations
3.2 Summary of Results And Observations
3.3 Implementation Status on Thermal
Plume Surveys
4.1 Review
of Environmental Monitoring Procedures
4.2 Assessment
of Environmental Monitoring Results
4.3 Status of
Environmental Licensing and Permitting
4.4 Implementation
Status of Environmental Mitigation Measures
4.5 Implementation Status
of Event/Action Plans
4.6 Implementation Status
of Environmental Complaint Handling Procedures
5.1 Outage Plan for the coming 3 months
5.2 Key issues for the coming
month
List of Tables
Table 2.1 Air Quality Monitoring Parameters and Frequency
Table 2.2 Monthly Fuel Data and Generation Output
Table 3.1 Water Quality Monitoring Parameters and Frequencies for GT57
Table 4.1 Summary of AL Level Exceedances on Monitoring Parameters
Table 4.2 Summary of Environmental Licensing and Permit Status
Table 4.3 Implementation Schedule
Table 4.4 Environmental Complaints / Enquiries Received in January 2010
Table 4.5 Outstanding Environmental Complaints / Enquiries Carried
Over
List of figures
Figure 1.1 Location
of GT57 Combined Cycle Unit
Figure 1.2 Organization
Chart at Operational Phase
AppendiX
Appendix
B Action and Limit Levels for Air
Quality and Water Quality Monitoring
Appendix C Summary Results and Observations on Water Quality Monitoring
This is the January 2010 monthly Environmental Monitoring and Audit (EM&A) report for the Project “Operation of GT57 Combined Cycle Unit” prepared by the Environmental Team (ET). This report presents the results of impact monitoring on air quality and marine water quality for the said project in January 2010.
GT57 commissioning tests were conducted in January
2010. Installation of GT57 Continuous
Emission Monitoring (CEM) system has been completed. Field testing and tuning of the CEM system
was still in progress in January 2010. Air and water quality monitoring were conducted according
to the requirement stated in the EM&A manual. The implementation status of the environmental mitigation measures, Event/Action
Plan and environmental complaint handling procedures were also checked.
Environmental
Monitoring Works
Environmental monitoring works, as mentioned in the EM&A manual (Operational
phase), were performed during the operation of GT57 in the reporting period.
Air Quality
No
exceedance of hourly average water injection rate was recorded in the month.
Water Quality
No exceedance of Action and Limit levels for water quality was recorded in the month.
Environmental Licensing and Permitting
|
Description |
Permit/Licence No. |
Valid Period |
Issued To |
Date of Issuance |
|
|
From |
To |
||||
|
Environmental Permit |
EP-083/2000 |
04/12/2000 |
- |
HEC |
04/12/2000 |
|
Specified Processes Licence issued under APCO |
L-7-002(7) |
01/01/2009 |
31/12/2010 |
HEC |
31/12/2008 |
|
WPCO
discharge licence for L1-L9 and GT57* |
WT00005923-2010 |
29/01/2010 |
30/11/2011 |
HEC |
29/01/2010 |
* The renewed WPCO discharge licence for L1-L9
and GT57 has been issued to HK Electric on 29 January 2010.
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 monitor the water injection rate continuously.
· To monitor the NOx emission continuously through the newly installed GT57 CEM System.
· To monitor the fuel sulphur content of the LGO if the combined cycle unit is run on LGO.
Water Impact
· To continuously carry out the water quality monitoring for GT57 as required by the EM&A manual (Operational phase).
Concluding
Remarks
The
environmental performance of the project was generally satisfactory.
The Environmental Team (hereinafter called the
“ET”) was formed within the Hongkong Electric Co. Ltd (HEC) to
undertake Environmental Monitoring and Audit for “Operation of GT57 Combined Cycle Unit” (hereinafter
called the “Project”). Under
the requirements of Section 5 of Environmental Permit EP-083/2000, an EM&A
programme for impact environmental monitoring, as 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 and water quality are required for the
Project.
Figure 1.1 shows the location of the GT57
combined cycle unit. Making use of the
open area between the existing gas turbines at the south western corner of
Lamma Power Station, a steam-cycle bottoming system was installed to recover
the waste heat from the exhaust gas of GT5 and GT7 so as to produce an extra
output of 115MW and form a combined cycle unit of a gross output of 365MW. The exhaust gas after passing through the
heat recovery steam generator (HRSG) is discharged to the atmosphere through
the existing stacks of 80m height.
Cooling water required for the steam-cycle bottoming system is supplied
from additional C.W. pumps and returned to the existing No.1 C.W. outfall for
discharge to the sea. As a result of the
additional power output generated by the steam cycle, there is a substantial
gain in the overall thermal efficiency from about 30% (in a simple cycle GT) to
46% (in a combined cycle GT).
The additional equipment
installed for the project include:
·
2 numbers of heat recovery steam generators;
·
1 steam turbine building to house the steam turbine and auxiliaries;
·
Generator and unit transformer; and
·
2 numbers of additional C.W. pumps.
This report
summarizes the environmental monitoring and audit work for the Project for the
month of January
2010.
The
management structure to oversee the Project, includes the following:
· Environmental Protection Department (The Authority);
· General Manager (Corporate Development) (The official contact person between HEC and EPD);
· Environmental Team Leader (ET);
· Independent Environmental Checker (IEC);
· Environmental Team (ET).
The organization chart for the Operation EM&A programme is shown in Figure 1.2.
1.3 Summary of EM&A Requirements
The EM&A program requires
environmental monitoring for air and water quality.
The EM&A monitoring work
for air quality
and water quality are described in Sections 2 and 3 respectively.
The
following environmental audits are summarized in Section 4 of the report:
·
Environmental
monitoring results;
·
The
status of environmental licensing and permits for the Project;
·
The
implementation status of environmental protection and pollution control /
mitigation measures.
The future key issues for the Project will be reported in Section 5 of this report.
In accordance
with the EM&A manual (Operational Phase) for GT57 and the requirements
stipulated in the Specified Processes Licence issued under Air Pollution
Control Ordinance, water injection rates, sulphur content of fuel burnt (when
GT57 is run on light gas oil) are monitored. Various
operation parameters (viz generation output and fuel consumption) are
reported. Water
injection rates were checked against the Action/Limit Levels shown in Appendix B.
The monitoring frequency of various parameters is shown in table 2.1 below:
Table 2.1 Air Quality
Monitoring Parameters and Frequency
|
Parameter |
Frequency |
|
Hourly
Average Water Injection Rate |
Continuous,
when GT57 is operating |
|
|
Monthly |
Installation of GT57 Continuous Emission
Monitoring (CEM) system has been completed.
Field testing and tuning of the CEM system was
still in progress in January 2010.
2.2
Summary
of Results And Observations
GT57 commissioning tests were conducted in January
2010. Monitoring of various parameters as mentioned
in section 2.1 above was conducted during the operation of GT57 in the
reporting month. A monthly summary of fuel data and Generation Output, as per
the requirement stipulated in the SP licence, is shown below:
Table 2.2 Monthly
Fuel Data and Generation Output
|
|
GT5 |
GT7 |
Steam Turbine |
Total |
|
Generation Output (MWH) |
40,686.0 |
28,802.6 |
30,796.0 |
100,284.6 |
|
Natural
Gas Consumption (MT) |
10,653.0 |
7,550.8 |
- |
18,203.7 |
|
Fuel Oil Consumption (MT) |
0 |
0 |
- |
0 |
|
Sulphur content of Fuel Oil (%) |
0.13 |
0.13 |
|
|
* The figures may
not sum to total due to rounding.
|
|
GT6 |
|
Sulphur content of Fuel (%) |
0.13 |
Summary
of Action/Limit Level Alarm in January 2010
No
exceedance of Action and Limit levels for hourly average water injection rate was
recorded in the month.
In accordance
with the EM&A manual (Operational Phase) for GT57, 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 3.1 were monitored and checked against the Action/Limit Levels as
given in Appendix B.
Table 3.1 Water Quality
Monitoring Parameters and Frequencies for GT57
|
Item |
Parameters |
Frequency* |
|
1 |
Cooling
Water Temperature |
Daily |
|
2 |
Cooling
Water Temperature Rise |
Daily |
|
3 |
Total
Residual Chlorine |
Bi-weekly
|
|
4 |
Grease
& Oil from Oil Free Drain |
Monthly |
|
5 |
Temperature of
Blowdown Effluent (HRSG) |
At
least twice per year |
|
6 |
Suspended
Solids from Blowdown Effluent (HRSG) |
At
least twice per year |
|
7 |
Grease
& Oil from Blowdown Effluent
(HRSG) |
At
least twice per year |
|
8 |
Scum of
foam in ambient water |
Daily |
Remark: * monitoring will only be carried out when
there is operation of the GT57.
3.2
Summary
of Results And Observations
Monitoring of
various parameters as listed in table 3.1 above were carried out during the
operation of GT57 in the reporting month. A monthly summary of the data is shown in Appendix C.
The data recorded for the monitoring
parameters were all below their corresponding Action/Limit Levels. No
3.3
Implementation Status on Thermal Plume Surveys
No thermal plume
survey was carried out in the reporting month.
The thermal plume survey would only be conducted under the conditions
stipulated in the proposal on the programme and
methodologies of thermal plume attached in the EM&A
manual (Operational Phase).
4.1
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.
4.2
Assessment of Environmental Monitoring Results
Monitoring results for Air Quality and Water Quality
The environmental monitoring results for Air Quality and Water Quality in January 2010 presented in sections 2 and 3 respectively are summarized in Table 4.1.
Table 4.1 Summary
of AL 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 |
Hourly Average Water Injection Rate |
01/01/10-31/01/10 |
0 |
0 |
|
|
2 |
Stack NOx |
01/01/10-31/01/10 |
N.A. |
N.A. |
|
|
Water |
|||||
|
1 |
Cooling Water Temperature |
01/01/10-31/01/10 |
N.A. |
0 |
|
|
2 |
Cooling Water Temperature Rise |
01/01/10-31/01/10 |
0 |
0 |
|
|
3 |
Total Residual Chlorine |
01/01/10-31/01/10 |
0 |
0 |
|
|
4 |
Grease & Oil from Oil Free Drain |
01/01/10-31/01/10 |
0 |
0 |
|
|
5 |
Temperature of Blowdown Effluent |
01/01/10-31/01/10 |
N.A. |
N.A.* |
|
|
6 |
Suspended Solids from Blowdown Effluent |
01/01/10-31/01/10 |
N.A. |
N.A.* |
|
|
7 |
Grease & Oil from Blowdown Effluent |
01/01/10-31/01/10 |
N.A. |
N.A.* |
|
|
8 |
Inspection of Scum/Foam in ambient water |
01/01/10-31/01/10 |
0 |
0 |
|
Notes: *
Monitoring was not scheduled in the reporting month
4.3 Status of Environmental Licensing and Permitting
The renewed WPCO discharge licence for L1-L9 and GT57 has been issued to HK Electric on 29 January 2010. Before issuance of the renewed WPCO discharge licence, the terms and conditions of preceding licence are still applicable. All permits/licenses obtained as of January 2010 are summarised in Table 4.2.
Table 4.2 Summary of Environmental Licensing and Permit Status
|
Description |
Permit / Licence No. |
Valid Period |
Status |
|
|
From |
To |
|||
|
Environmental Permit |
EP-083/2000 |
04/12/2000 |
- |
Valid |
|
Specified Processes Licence issued under APCO |
L-7-002(7) |
01/01/2009 |
31/12/2010 |
Valid |
|
WPCO
discharge licence for L1-L9 and GT57 |
EP890/W2/XD008
(V.2) |
18/12/2006 |
30/11/2009 |
Superseded |
|
WPCO
discharge licence for L1-L9 and GT57 |
WT00005923-2010 |
29/01/2010 |
30/11/2011 |
Valid |
4.4
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 below:
Table 4.3 Implementation Schedule
|
Project Profile Ref. |
Mitigation Measures |
Implementation Status |
|
19 |
Use of 0.2% sulphur content for
oil-firing of the conversion unit. |
Complied |
|
19 |
Use of acoustic enclosures
around major noise sources |
Complied |
4.5 Implementation Status of Event/Action Plans
The Event/Action Plans for air quality and water quality extracted from the EM&A Manual (Operational Phase) are presented in Appendix A.
As no action/limit level exceedance was recorded, no action has been devised.
4.6 Implementation Status of Environmental Complaint Handling Procedures
In January 2010, no complaint against the Project was received.
Table 4.4 Environmental
Complaints / Enquiries Received in January 2010
|
Case Reference / Date, Time Received / Date, Time Concerned |
Descriptions / Actions Taken |
Conclusion / Status |
|
Nil |
N/A |
N/A |
Table 4.5 Outstanding Environmental Complaints / Enquiries Carried Over
|
Case Reference / Date, Time Received / Date, Time Concerned |
Descriptions / Actions Taken |
Conclusion / Status |
|
Nil |
N/A |
N/A |
5.1
Outage
Plan for the coming 3 months
No major outage plan
for the next 3 months.
5.2 Key issues for the coming month
Key issues to be considered in the coming month include:
Air Impact
· To monitor the water injection rate continuously.
· To monitor the NOx emission continuously through the newly installed GT57 CEM System.
· To monitor the fuel sulphur content of the LGO if the combined cycle unit is run on LGO.
Water Impact
· To continuously carry out the water quality monitoring for GT57 as required by the EM&A manual (Operational phase).
The GT57 reliability upgrading work was
completed. The commissioning works were
conducted in January 2010.
Environmental monitoring was performed as required in the reporting month. All monitoring results were checked and reviewed.
No Action/Limit level exceedance on water injection rate was recorded in the reporting month.
No Action/Limit level exceedance on water quality parameters were recorded in the reporting month.
Environmental
mitigation measures recommended in the Project Profile 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.
Appendix A Event / Action
Plans
Table A.1 Event and Action Plans 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 and advise ET 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 and advises ET for any
finding; Verify the
implementation of the remedial measures; |
Discuss with ET 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 advise
IEC, and inform the 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 and advises ET of any finding; Verify the
implementation of the remedial measures. |
Take immediate
action to avoid further exceedances; Discuss with ET 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 advise IEC, and inform 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/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 on remedial actions required; Implement the
agreed remedial actions; Stop the unit and check the suspected defective parts if the problem still does
not come under control. |
Table A.2 Event/Action Plan for Water Quality
|
Exceedance |
ET Leader |
IEC |
Operations Engineer |
|
Action Level |
|
||
|
Exceedance on one sampling day |
Verbally inform
IEC; Repeat in-situ
measurement to confirm findings; Identify
source(s) of impact. |
Check monitoring data submitted by ET and advises ET 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; Increase monitoring frequency; Discuss with Operations Engineers on remedial actions required; If exceedance stops, discontinue additional monitoring |
Check monitoring
data submitted by ET and advises ET for any
finding; Verify the
implementation of the remedial measures. |
Discuss with ET on remedial actions required; Implement the
agreed remedial actions. |
|
Limit Level |
|
|
|
|
Exceedance on one sampling day |
Repeat
measurement to confirm finding; Identify the
source(s) of impact. Verbally advise IEC
and
inform the EPD of the exceedance, as soon as practicable; Discuss with Operations Engineers on remedial actions require; 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 and advises ET for any
finding; Verify the
implementation of the remedial measures. |
Take immediate
action to avoid further exceedance; Discuss with ET on remedial actions required; Implement the
agreed remedial actions. |
|
Exceedances on more than one
consecutive sampling day |
Identify the
source(s) of impact. Verbally advise
IEC, and inform 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/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 on remedial actions required; Implement the
agreed remedial actions; Stop the unit and check the suspected defective parts if the problem still does
not come under control. |
Appendix
B Action and Limit Levels for Air
Quality, Water Quality Monitoring
B.1 Air
|
Parameter |
Action |
Limit |
|
Stack
NOx (gas firing) |
80 mg/Nm3 |
90 mg/Nm3 |
|
Stack
NOx (oil firing) |
150 mg/Nm3 |
150 mg/Nm3 |
|
Hourly Average Water Injection Rate |
Measured
Hourly Average Water Injection Rate lower than corresponding Specified Hourly
Average water Injection Rate. |
Measured Hourly Average Water Injection Rate lower than corresponding Specified Hourly Average water Injection Rate. |
Note: Expressed as at 0ºC, 101.325kPa, dry and
corrected to 15% O2 condition.
The Action / Limit level for
stack NOx would be revised with more emission data available if deemed
necessary.
B.2 Water
|
Monitoring Area / Location |
Parameters to be Monitored |
Frequency |
Concentration Not to Be Exceeded |
Action |
Limit |
Proposed Action |
|
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 and temperature at outfall should not exceed 40°C |
9.5°C |
+10°C above intake |
Please refer to
the event & action plans in Table A.2. |
|
Total Residual Chlorine |
Bi-weekly, when the combined cycle unit is operating |
0.5mg/L |
0.47 |
0.5 |
||
|
Trade Effluent oil free drain discharge |
Grease and Oil |
Monthly, when
the combined cycle unit is operating |
20 mg/L |
15 |
20 |
Please refer to the event & action plans in
Table A.2. |
|
Trade Effluent Boiler Blowdown (HRSG) |
Temperature |
At least twice per year, when the combined cycle unit is operating |
40°C |
- |
40°C |
Please refer to the event & action plans in
Table A.2. |
|
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 |
Please refer to the event & action plans in
Table A.2. |
Appendix
C Summary Results and Observations on
Water Quality Monitoring
Maximum Outlet Temperature and Temperature Rise (Deg. Celsius) of
Cooling Water at C.W. Outfall No.1 Serving Units L1-L6 & GT57 Condensers
Weighted by Flowrates of Individual Streams (January 2010)
|
Date |
Maximum
Outlet Temperature (Deg. Celsius) |
Maximum
Outlet Temperature Rise (Deg.
Celsius) |
|
1/1/2010 |
* |
* |
|
2/1/2010 |
* |
* |
|
3/1/2010 |
23.1 |
4.3 |
|
4/1/2010 |
23.9 |
5.3 |
|
5/1/2010 |
24.0 |
5.3 |
|
6/1/2010 |
24.1 |
5.6 |
|
7/1/2010 |
24.5 |
6.2 |
|
8/1/2010 |
23.9 |
6.2 |
|
9/1/2010 |
23.0 |
5.3 |
|
10/1/2010 |
22.7 |
4.9 |
|
11/1/2010 |
* |
* |
|
12/1/2010 |
* |
* |
|
13/1/2010 |
* |
* |
|
14/1/2010 |
21.7 |
4.6 |
|
15/1/2010 |
21.6 |
4.4 |
|
16/1/2010 |
* |
* |
|
17/1/2010 |
* |
* |
|
18/1/2010 |
21.8 |
4.3 |
|
19/1/2010 |
21.8 |
4.3 |
|
20/1/2010 |
22.5 |
4.7 |
|
21/1/2010 |
22.9 |
4.9 |
|
22/1/2010 |
22.4 |
4.7 |
|
23/1/2010 |
22.9 |
5.3 |
|
24/1/2010 |
22.5 |
5.1 |
|
25/1/2010 |
22.5 |
5.0 |
|
26/1/2010 |
23.2 |
5.8 |
|
27/1/2010 |
21.7 |
4.4 |
|
28/1/2010 |
22.2 |
4.7 |
|
29/1/2010 |
24.3 |
6.4 |
|
30/1/2010 |
22.6 |
4.7 |
|
31/1/2010 |
23.7 |
5.3 |
Total
Residual Chlorine Level at C.W. Outfall No.1 (January 2010)
|
Date
of sampling |
15/01 |
28/01 |
|
Total
Residual Chlorine, mg/L |
0.25 |
0.25 |
Grease &
Oil at Oil Free Drain From Oil Interceptor for GT57 (January
2010)
|
Date
of sampling |
29/01 |
|
Grease
& Oil, mg/L |
<10 |
Boiler
Blowdown from GT5 & GT7 HRSG to C.W. Outfall No.1 (January 2010)
|
Source
of discharge |
GT5 |
GT7 |
|
Suspended
Solid, mg/L |
# |
# |
|
Grease
& Oil, mg/L |
# |
# |
|
Temperature,
Deg. Celsius |
# |
# |
|
Remarks: |
|
|
1. * GT57 condenser was not in operation. |
|
|
2. # Monitoring was not scheduled in the reporting month. The last monitoring was carried out in December 2009. |
|
Observation
of Scum Formation in Marine Water Mixing Zone
At Lamma
Power Station (January 2010)
|
Date |
Observation |
|
1/1/2010 |
No scum within 500m of |
|
2/1/2010 |
No scum within 500m of |
|
3/1/2010 |
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 |
|
4/1/2010 |
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 |
|
5/1/2010 |
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 |
|
6/1/2010 |
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 |
|
7/1/2010 |
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 |
|
8/1/2010 |
No scum within 500m of |
|
9/1/2010 |
No scum within 500m of |
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10/1/2010 |
No scum within 500m of |
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11/1/2010 |
No scum within 500m of |
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12/1/2010 |
No scum within 500m of |
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13/1/2010 |
No scum within 500m of |
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14/1/2010 |
No scum within 500m of |
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15/1/2010 |
No scum within 500m of |
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16/1/2010 |
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 |
|
17/1/2010 |
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 |
|
18/1/2010 |
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 |
|
19/1/2010 |
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 |
|
20/1/2010 |
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 |
|
21/1/2010 |
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 |
|
22/1/2010 |
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 |
|
23/1/2010 |
No scum within 500m of |
|
24/1/2010 |
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 |
|
25/1/2010 |
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 |
|
26/1/2010 |
No scum within 500m of |
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27/1/2010 |
No scum within 500m of |
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28/1/2010 |
No scum within 500m of |
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29/1/2010 |
No scum within 500m of |
|
30/1/2010 |
No scum within 500m of |
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31/1/2010 |
No scum within 500m of |