EXECUTIVE SUMMARY

EXECUTIVE SUMMARY

Unit L5 Flue Gas Desulphurization (FGD) Plant commenced operation in July 2009, followed by Units L2 and L4 FGD Plants in April 2010 after completion of erection works and a series of commissioning tests. This is the quarterly Environmental Monitoring and Audit (EM&A) report for the Projects “Lamma Power Station Units L4 & L5 Flue Gas Desulphurization Plant Retrofit” and “Lamma Power Station Unit L2 Flue Gas Desulphurization Plant Retrofit” prepared by the Environmental Team (ET). This report presents the results of impact monitoring on air and water quality and environmental audit for the operation of the said projects in the period from July to September 2010.

Environmental monitoring for air quality and water quality were carried out for the purpose of this EM&A program as well as for fulfilling the requirements stipulated in the relevant licences. 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

Units L2, L4 and L5 were out of service during the following period:

Unit	Period	Remark
L4	26/7/2010 10:12 to 19:14	Unit was tripped due to faulty FGD Outlet damper limits switch
L4	27/08/2010 19:58 to 30/08/2010 05:58	Turbine TVEH converter check
L4	16/09/2010 01:03 to 18/09/2010 07:37	Boiler RH tube leakage
L5	20/08/2010 20:08 to 21/08/2010 05:37	30% Boiler MCR light oil firing test

Malfunction/Outage Records of Pollution Control Equipment

Major outages of the Pollution Control Equipment during the reporting period are listed below:

Equipment	Period	Cause	Actions Taken
L2 FGD	24/07/2010 00:03 to 14/08/2010 21:28	Defect rectification	EPD was informed by letters on 22/07/2010 & 16/08/2010
L2 FGD	13/09/2010 09:46 to 18/10/2010 15:41	Booster fan vibration high	EPD was informed by letters on 15/09/2010 & 19/10/2010
L4 FGD	25/08/2010 00:03 to 15/09/2010 01:19	Defect rectification and lining inspection	EPD was informed by letters on 25/08/2010, 03/09/2010 & 15/09/2010
L5 FGD	15/08/2010 01:36 to 24/08/2010 19:58	Plant computer system upgrading work	EPD was informed by letters on 14/08/2010 & 25/08/2010
L5 FGD	30/08/2010 01:36 to 19:00	Booster fan blade angle control fault	EPD was informed by letter on 31/08/2010

For other minor outages, please refer to section 1.4 of the report.

Environmental Monitoring Works

Environmental monitoring works were performed during the operation of Units L2, L4 and L5 FGD Plants in the reporting period.

Air Quality

No exceedance of Action and Limit levels for air quality were recorded in the reporting period.

Water Quality

No exceedance of Action and Limit levels for water quality were recorded in the reporting period.

Environmental Licensing and Permitting

Description	Permit / Licence No.	Valid Period		Issued To	Date of Issuance
Description	Permit / Licence No.	From	To	Issued To	Date of Issuance
Environmental Permit for L4/5 FGD plants retrofit project	EP-248/2006	25/04/2006	-	HK Electric	25/04/2006
Environmental Permit for Unit L2 FGD plant retrofit project	EP-287/2007	02/10/2007	-	HK Electric	02/10/2007
Specified Processes Licence issued under APCO	L-7-002(7)	01/01/2009	31/12/2010	HK Electric	31/12/2008
WPCO discharge licence for Ash Lagoon	EP890/W2/XD018	16/04/2007	31/12/2011	HK Electric	16/04/2007

Implementation Status of Environmental Mitigation Measures

Environmental mitigation measures were implemented in the reporting period.

Environmental Complaints

During the reporting period, there was one (1) enquiry concerning “dark smoke and combustion smell from Lamma P/S”. Yet no abnormality that might have caused the alleged observation was identified. There was no further enquiry since then. The case has already been mentioned in the last quarterly report.

Future key issues

Key issues to be considered in the coming months include:

Air Impact

· To continuously carry out the air quality monitoring for Units L2, L4 and L5.

Water Impact

· To continuously carry out the water quality monitoring for FGD WWT plant.

Concluding Remarks

The environmental performance of the projects was generally satisfactory.

1. INTRODUCTION

Unit L5 Flue Gas Desulphurization (FGD) Plant commenced operation in July 2009, followed by Units L2 and L4 FGD Plants in April 2010 after completion of erection works and a series of commissioning tests. The Environmental Team (hereinafter called the “ET”) was formed within The Hongkong Electric Co. Ltd (HK Electric) to undertake Environmental Monitoring and Audit for the “Operation of Lamma Power Station Units L4 & L5 Flue Gas Desulpurization Plant Retrofit Project” under the requirements of Clause 2.18 of Environmental Permit (EP) No. EP-248/2006 and “Operation of Lamma Power Station Unit L2 Flue Gas Desulpurization Plant Retrofit Project” under the requirements of Clause 2.10 of Environmental Permit (EP) No. EP-287/2007.

This report summarizes the environmental monitoring and audit work for the said Projects for the period from July to September 2010.

1.1 Background

The Projects involves retrofitting the three existing coal-fired generating Units L2, L4 and L5 of Lamma Power Station with Flue Gas Desulphurisation (FGD) plants for reducing sulphur dioxide emissions in support of Government policy to improve the air quality of the Pearl River Delta.

The Projects include the installation and operation of FGD plants with flue gas desulphurization efficiency of 90% for the three coal-fired Units L2, L4 & L5 to reduce the overall SO2 emissions from Lamma Power Station. The process adopted for the FGD plants is “Wet Limestone-Gypsum”, a technology which has already been used in, and proved effective and reliable for the existing coal-fired units L6, L7 & L8. The flue gas from the boiler is directed to the FGD absorber inside which removal of SO2 is take place by reaction with limestone slurry. After passing through the absorber, the treated flue gas is heated up by a gas-gas heater to over 80ºC at boiler rated capacity and directed back to the existing chimney for discharge to the atmosphere. Figure 1.1a, Figure 1.1b, Figure 1.2a, Figure 1.2b and Figure 1.3 show the location and schematic of the FGD plants.

Wastewater filtrated from the reacted limestone slurry, i.e. gypsum slurry, is produced and it is directed to the existing FGD wastewater treatment plant (WWTP). The FGD WWTP is designed to treat the effluent from FGD plants by alkalization, precipitation and neutralization processes. The schematic diagram of the FGD WWTP is illustrated in Figure 1.4.

The additional equipment for the FGD Plants retrofit projects for Units L2, L4 and L5 includes:

· Three sets of FGD absorbers and associated ductworks

· Three sets of booster fans

· Three sets of gas-gas heaters

· Two FGD Switchgear and Equipment Buildings

· Gypsum dewatering system comprising two sets of hydrocyclones and belt filters

1.2 Project Organisation

The management structure to oversee the Projects includes the following:

· Environmental Protection Department (The Authority);

· General Manager (Corporate Development) (The official contact person between HK Electric and EPD);

· Environmental Team Leader (ET Leader);

· Environmental Team (ET).

The organization chart for the Operation EM&A programme is shown in Figure 1.5.

1.3 Plant Availability during the Reporting Period

Units L2, L4 and L5 were out of service during the following period:

Unit	Period	Remark
L4	26/7/2010 10:12 to 19:14	Unit was tripped due to faulty FGD Outlet damper limits switch
L4	27/08/2010 19:58 to 30/08/2010 05:58	Turbine TVEH converter check
L4	16/09/2010 01:03 to 18/09/2010 07:37	Boiler RH tube leakage
L5	20/08/2010 20:08 to 21/08/2010 05:37	30% Boiler MCR light oil firing test

1.4 Malfunction/Outage Records of Pollution Control Equipment

Equipment	Period	Cause	Actions Taken
L2 FGD	02/07/2010 21:40 to 21:47	FGD was bypassed due to booster fan inlet damper control sluggish	EPD was informed by letter on 05/07/2010
L2 FGD	10/07/2010 04:12 to 04:14	Routine checking of bypass dampers	EPD was informed by letter on 13/07/2010
L2 FGD	17/07/2010 23:42 to 18/07/2010 00:02	Routine checking of bypass dampers	EPD was informed by letter on 19/07/2010
L2 FGD	21/07/2010 13:11 to 13:14 17:29 to 17:37	FGD was bypassed due to booster fan inlet damper control sluggish	EPD was informed by letter on 22/07/2010
L2 FGD	24/07/2010 00:03 to 14/08/2010 21:28	Defect rectification	EPD was informed by letters on 22/07/2010 & 16/08/2010
L2 FGD	20/08/2010 06:18 to 06:23	FGD was bypassed due to booster fan inlet damper control sluggish	EPD was informed by letter on 24/08/2010
L2 FGD	23/08/2010 05:41 to 05:59	FGD was bypassed due to booster fan inlet damper control sluggish	EPD was informed by letter on 24/08/2010
L2 FGD	24/08/2010 09:47 to 10:23	FGD was bypassed due to booster fan inlet damper control sluggish	EPD was informed by letter on 24/08/2010
L2 FGD	25/08/2010 00:17 to 00:26 19:07 to 19:17	FGD was bypassed due to booster fan inlet damper control sluggish	EPD was informed by letter on 27/08/2010
L2 FGD	05/09/2010 04:29 to 04:36	Routine checking of bypass dampers	EPD was informed by letter on 07/09/2010
L2 FGD	09/09/2010 18:40 to 18:45	FGD was bypassed due to booster fan inlet damper control sluggish	EPD was informed by letter on 13/09/2010
L2 FGD	12/09/2010 13:14 to 13:17	FGD was bypassed due to booster fan inlet damper control sluggish	EPD was informed by letter on 13/09/2010
L2 FGD	13/09/2010 09:46 to 18/10/2010 15:41	Booster fan vibration high	EPD was informed by letters on 15/09/2010 & 19/10/2010
L2 FGD	09/09/2010 18:40 to 18:45	FGD was bypassed due to booster fan inlet damper control sluggish	EPD was informed by letter on 13/09/2010
L2 FGD	12/09/2010 13:14 to 13:17	FGD was bypassed due to booster fan inlet damper control sluggish	EPD was informed by letter dated 13/09/2010
L4 FGD	03/07/2010 02:15 to 02:18	Routine checking of bypass dampers	EPD was informed by letter dated 05/07/2010
L4 FGD	10/07/2010 04:08 to 04:13	Routine checking of bypass dampers	EPD was informed by letter dated 13/07/2010
L4 FGD	17/07/2010 03:12 to 03:18	Routine checking of bypass dampers	EPD was informed by letter dated 19/07/2010
L4 FGD	24/07/2010 01:46 to 02:18	Routine checking of bypass dampers	EPD was informed by letter dated 26/07/2010
L4 FGD	07/08/2010 02:28 to 02:33	Routine checking of bypass dampers	EPD was informed by letter dated 09/08/2010
L4 FGD	14/08/2010 03:08 to 03:13	Routine checking of bypass dampers	EPD was informed by letter dated 14/08/2010
L4 FGD	21/08/2010 03:26 to 03:43	Routine checking of bypass dampers	EPD was informed by letter dated 24/08/2010
L4 FGD	25/08/2010 00:03 to 15/09/2010 01:19	Defect rectification and lining inspection	EPD was informed by letters on 25/08/2010, 03/09/2010 & 15/09/2010
L4 FGD	26/09/2010 15:20 to 15:33	Tripping of absorber recirculating pump	EPD was informed by letter on 27/09/2010
L5 FGD	02/07/2010 16:00 to 16:37	FGD was bypassed due to Mal-operation of booster fan vibration high alarm	EPD was informed by letter on 05/07/2010
L5 FGD	10/07/2010 03:38 to 03:42	Routine checking of bypass dampers	EPD was informed by letter on 13/07/2010
L5 FGD	10/07/2010 05:23 to 06:02	FGD was bypassed due to booster fan control oil temperature high	EPD was informed by letter on 13/07/2010
L5 FGD	17/07/2010 03:22 to 03:29	Routine checking of bypass dampers	EPD was informed by letter on 19/07/2010
L5 FGD	24/07/2010 02:28 to 02:50	Routine checking of bypass dampers	EPD was informed by letter on 26/07/2010
L5 FGD	26/07/2010 19:29 to 21:27	Repair work of FGD inlet and outlet damper limits	EPD was informed by letter on 27/07/2010
L5 FGD	31/07/2010 01:25 to 01:27	Routine checking of bypass dampers	EPD was informed by letter on 02/08/2010
L5 FGD	07/08/2010 02:21 to 02:26	Routine checking of bypass dampers	EPD was informed by letter on 09/08/2010
L5 FGD	15/08/2010 01:36 to 24/08/2010 19:58	Plant computer system upgrading work	EPD was informed by letters on 14/08/2010 & 25/08/2010
L5 FGD	30/08/2010 01:36 to 19:00	Booster fan blade angle control fault	EPD was informed by letter on 31/08/2010
L5 FGD	02/09/2010 15:54 to 15:57	FGD was bypassed due to inlet temperature high	EPD was informed by letter on 03/09/2010
L5 FGD	04/09/2010 02:07 to 02:12	Routine checking of bypass dampers	EPD was informed by letter on 07/09/2010
L5 FGD	11/09/2010 04:27 to 04:33	Routine checking of bypass dampers	EPD was informed by letter on 13/09/2010
L5 FGD	18/09/2010 02:44 to 03:03	Routine checking of bypass dampers	EPD was informed by letter on 20/09/2010
L5 FGD	25/09/2010 01:11 to 01:14	Routine checking of bypass dampers	EPD was informed by letter on 27/09/2010

1.5 Summary of EM&A Requirements

Environmental Monitoring and Audit (EM&A) requirements have been discussed in the Environmental Impact Assessment (EIA) Report/ Project Profile for the Projects. The assessment results indicate that environmental monitoring works required for the EM&A programmes of these Projects are already in place or would be implemented under Lamma Power Station Extension Environmental Permit or environmental licenses for the operation of the existing Lamma Power Station. Such monitoring works are considered adequate for the Projects and no additional EM&A activities are required. Hence, environmental monitoring for air quality and water quality are carried out for the purpose of this EM&A program as well as for fulfilling the requirements stipulated in the relevant licences.

The EM&A monitoring work for air and water quality are described in Section 2 and Section 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 Projects;

· The implementation status of environmental protection and pollution control / mitigation measures.

The future key issues for the Projects will be reported in Section 5 of this report.

4. ENVIRONMENTAL AUDIT

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, noise and water quality are presented in Sections 2, 3 and 4 respectively are summarized in Table 4.1.

Table 4.1 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
Item	Parameter Monitored	Monitoring Period	Action Level	Limit Level	Event/Action Plan Implementation Status and Results
Air
1	Annual analysis of dust particulate emission rates at chimney stacks.	01/07/10-30/09/10	N.A.	0
2	Continuous monitoring of opacity, NOx, SO2 and CO2 in the flue gas at the chimney stacks	01/07/10-30/09/10	0	0
3	TSP monitoring at Lamma Power Station Boundary (ie East Gate and Reservoir).	01/07/10-30/09/10	0	0
4	Ambient SO2 & NOx monitoring at the Peak, Queen Mary Hospital , Victoria Road, Chung Hom Kok, Ap Lei Chau and Cheung Chau.	01/07/10-30/09/10	0	0
Water
1	pH in WWTP Effluent	01/07/10-30/09/10	0	0
2	Suspended Solids in WWTP Effluent	01/07/10-30/09/10	0	0
3	Iron in WWTP Effluent	01/07/10-30/09/10	0	0
4	Barium in WWTP Effluent	01/07/10-30/09/10	0	0
5	Mercury in WWTP Effluent	01/07/10-30/09/10	0	0
6	Cadmium in WWTP Effluent	01/07/10-30/09/10	0	0
7	Cyanide in WWTP Effluent	01/07/10-30/09/10	0	0
8	Total Phosphorus in WWTP Effluent	01/07/10-30/09/10	0	0
9	Total Nitrogen in WWTP Effluent	01/07/10-30/09/10	0	0

Waste Management Records

The quantity of FGD gypsum and sludge collected for reuse by contractor in the reporting period are shown in Table 4.2.

Table 4.2 Amount of Gypsum and Sludge Collected for Reuse by Contractor

Period	Amount of Gypsum Collected	Amount of Sludge Collected
July 2010	9,705.9 MT	25.0 MT
August 2010	11,449.4 MT	50.0 MT
September 2010	10,244.1 MT	45.9 MT

4.3 Status of Environmental Licensing and Permitting

All permits/licenses obtained as of June 2010 are summarised in Table 4.3.

Table 4.3 Summary of Environmental Licensing and Permit Status

Description	Permit / Licence No.	Valid Period		Status
Description	Permit / Licence No.	From	To	Status
Environmental Permit for Units L4/5 FGD Plants Retrofit	EP-248/2006	25/04/2006	-	Valid
Environmental Permit for Unit L2 FGD Plant Retrofit	EP-287/2007	02/10/2007	-	Valid
Specified Processes Licence issued under APCO	L-7-002(7)	01/01/2009	31/12/2010	Valid
WPCO discharge licence for Ash Lagoon	EP890/W2/XD018	16/04/2007	31/12/2011	Valid

4.4 Implementation Status of Environmental Mitigation Measures

Mitigation measures detailed in the EIA Report and EP are required to be implemented. An updated summary of the Environmental Mitigation Implementation Schedule (EMIS) is presented in Appendix D.

4.5 Implementation Status of Event/Action Plan

A list of specific actions in the event of exceedances of the various threshold levels for specific emission and discharge sources is given 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

During the reporting period, there was one (1) enquiry concerning “dark smoke and combustion smell from Lamma P/S” as summarized in Table 4.4. The case has already been mentioned in the last quarterly report.

Table 4.4 Environmental Complaints / Enquiries Received

Case Reference /

Date, Time Received /

Date, Time Concerned

Descriptions /

Actions Taken

Conclusion /

Status

Reference:

EC100700165

Received:

08/07/2010 p.m.

Concerned:

23/06/2010 – 07/07/2010 at night and mid-night

EPD informed HK Electric via email that the Department had received two complaints against “dark smoke and combustion smell from the chimneys of Lamma P/S at night and mid-night”. After investigation, HK Electric found no abnormality that might have caused the alleged observation. HK Electric has also provided relevant monitoring data to EPD for reference as requested. There was no further enquiry since then.

Nothing abnormal was identified. EPD was replied and there was no further enquiry.

Table 4.4 Outstanding Environmental Complaints / Enquiries Carried Over

Case Reference /

Date, Time Received /

Date, Time Concerned

Descriptions /

Actions Taken

Conclusion /

Status

Nil

N/A

Source of Emissions	Parameters to be Monitored	Frequency	Concentration Not to Be Exceeded	Action	Limit	Proposed Action
Steam boilers L2, L4 and L5	Particulate Particulate (Opacity) SO2 NOx expressed as NO2 (For L4 and L5 only)	once/year continuous continuous continuous	85 mg/Nm3 40% (bihourly) 200 mg/Nm3 (1h) 615 mg/Nm3 (1h)	- 35 190 585	85 40 200 615	ET Leader informs Generation Division at action level. Maintenance initiated. Temporary load shift until pollution control equipment repaired and reinstated. Report to EPD.
Fugitive dust (Coal, PFA, limestone, gypsum)	TSP	Once every six days.	260 (µg/m3) (24 hours)	-	260	Investigation of sources and additional dust suppression to be employed at Limit level. Frequency of monitoring to be increased as necessary.
Chimney emissions	Ambient air SO2 NO2	Continuous at existing ambient air monitoring stations	800 (µg/m3) (1h) 300 (µg/m3) (1h)	- -	800 300	ET to review data on post-hoc basis and check for possible power station contribution.

Source of Discharges	Parameters to be Monitored	Frequency	Concentration Not to Be Exceeded	Action	Limit	Proposed Action
FGD Wastewater Treatment Plant	pH	Daily	6-9	-	6-9	If pH exceeds limit level, consideration to be given to adjust chemical dosing. ET Leader inform Generation Division and investigation be initiated to identify and remedy cause. For all other parameters except pH, Generation Division to be informed, frequency of monitoring to be increased, and investigations to be initiated to identify cause and remedy if concentration exceeds action level. If problem persists to exceed the limit level, ET Leader verbally informs EPD and ensures remedial actions implemented.
Suspended Solids	Daily	30 mg/L	25	30
Iron	Monthly	4 mg/L	3.6	4
Barium	Monthly	1.5 mg/L	1.3	1.5
Mercury	Monthly	0.005 mg/L	0.0045	0.005
Cadmium	Monthly	0.005 mg/L	0.0045	0.005
Cyanide	Monthly	0.1 mg/L	0.09	0.1
Total Phosphorus	Monthly	8 mg/L	7.2	8
Total Nitrogen	Monthly	400 mg/L	360	400

B.2 Unit L2, L4 and L5 Stack Monitoring at Lamma Power Station

B.2.1 Monthly Summary of Stack NOx and SO2 for Unit L5

Date	Daily Maximum
Date	SO2 concentration (mg/Nm3)^#	NOx concentration (mg/Nm3)^#	Opacity (%)
1/7/2010	16	373	14
2/7/2010	109	378	15
3/7/2010	59	291	15
4/7/2010	23	303	14
5/7/2010	58	354	15
6/7/2010	74	347	15
7/7/2010	46	361	15
8/7/2010	23	332	15
9/7/2010	42	309	16
10/7/2010	41	310	17
11/7/2010	35	417	17
12/7/2010	36	418	18
13/7/2010	38	377	17
14/7/2010	43	341	16
15/7/2010	55	342	17
16/7/2010	52	309	15
17/7/2010	26	319	15
18/7/2010	20	317	14
19/7/2010	36	337	14
20/7/2010	39	306	14
21/7/2010	54	310	14
22/7/2010	63	312	14
23/7/2010	86	339	15
24/7/2010	80	310	17
25/7/2010	50	300	14
26/7/2010	48	336	15
27/7/2010	62	282	15
28/7/2010	42	272	15
29/7/2010	51	312	15
30/7/2010	37	327	15
31/7/2010	44	317	15

Date	Daily Maximum
Date	SO2 concentration (mg/Nm3)^#	NOx concentration (mg/Nm3)^#	Opacity (%)
1/8/2010	53	319	15
2/8/2010	66	391	18
3/8/2010	31	366	14
4/8/2010	50	356	15
5/8/2010	100	403	15
6/8/2010	72	357	15
7/8/2010	77	378	20
8/8/2010	58	358	15
9/8/2010	62	386	15
10/8/2010	61	380	15
11/8/2010	76	357	15
12/8/2010	60	442	18
13/8/2010	53	454	18
14/8/2010	39	477	20
15/8/2010	6	438	15
16/8/2010	FGD bypassed	445	23
17/8/2010	FGD bypassed	423	18
18/8/2010	FGD bypassed	418	19
19/8/2010	FGD bypassed	399	19
20/8/2010	FGD bypassed	314	16
21/8/2010	FGD bypassed	329	15
22/8/2010	FGD bypassed	453	15
23/8/2010	FGD bypassed	529	19
24/8/2010	42	424	17
25/8/2010	47	404	20
26/8/2010	47	415	19
27/8/2010	99	412	15
28/8/2010	88	366	15
29/8/2010	70	355	15
30/8/2010	92	303	17
31/8/2010	112	321	15

Date	Daily Maximum
Date	SO2 concentration (mg/Nm3)^#	NOx concentration (mg/Nm3)^#	Opacity (%)
1/9/2010	83	238	15
2/9/2010	78	267	14
3/9/2010	84	315	15
4/9/2010	80	344	15
5/9/2010	59	283	15
6/9/2010	97	298	15
7/9/2010	99	306	15
8/9/2010	92	322	16
9/9/2010	81	290	15
10/9/2010	72	420	21
11/9/2010	96	305	16
12/9/2010	115	304	15
13/9/2010	140	378	17
14/9/2010	96	320	15
15/9/2010	101	290	14
16/9/2010	78	308	15
17/9/2010	58	423	21
18/9/2010	29	358	22
19/9/2010	21	418	20
20/9/2010	53	450	22
21/9/2010	78	386	21
22/9/2010	103	389	18
23/9/2010	42	336	15
24/9/2010	41	303	19
25/9/2010	73	364	16
26/9/2010	55	317	14
27/9/2010	65	334	20
28/9/2010	84	266	21
29/9/2010	71	302	14
30/9/2010	93	253	14

Note: # - Hourly average value. Expressed as at 0ºC, 101.325kPa, dry and corrected to 12% CO₂ condition.

* - Unit L5 was not on load.

B.2.2 Monthly Summary of Stack NOx and SO2 for Unit L4

Date	Daily Maximum
Date	SO2 concentration (mg/Nm3)^#	NOx concentration (mg/Nm3)^#	Opacity (%)
1/7/2010	29	374	7
2/7/2010	108	366	9
3/7/2010	106	416	12
4/7/2010	77	443	8
5/7/2010	91	439	8
6/7/2010	116	326	12
7/7/2010	93	436	9
8/7/2010	52	274	8
9/7/2010	78	342	8
10/7/2010	44	292	9
11/7/2010	86	346	10
12/7/2010	91	306	11
13/7/2010	78	325	15
14/7/2010	91	339	16
15/7/2010	103	374	16
16/7/2010	93	476	14
17/7/2010	111	358	14
18/7/2010	117	358	15
19/7/2010	134	382	16
20/7/2010	128	415	13
21/7/2010	129	388	13
22/7/2010	119	412	13
23/7/2010	126	441	14
24/7/2010	127	435	14
25/7/2010	131	364	14
26/7/2010	118	447	15
27/7/2010	117	394	14
28/7/2010	116	376	12
29/7/2010	93	303	17
30/7/2010	91	318	16
31/7/2010	154	364	15

Date	Daily Maximum
Date	SO2 concentration (mg/Nm3)^#	NOx concentration (mg/Nm3)^#	Opacity (%)
1/8/2010	116	330	15
2/8/2010	104	384	15
3/8/2010	93	473	14
4/8/2010	102	411	16
5/8/2010	87	412	16
6/8/2010	100	458	15
7/8/2010	115	308	16
8/8/2010	88	355	14
9/8/2010	108	416	15
10/8/2010	125	339	16
11/8/2010	120	370	12
12/8/2010	125	468	16
13/8/2010	98	317	13
14/8/2010	104	387	14
15/8/2010	82	368	14
16/8/2010	67	388	19
17/8/2010	66	389	22
18/8/2010	63	459	14
19/8/2010	70	346	18
20/8/2010	80	444	18
21/8/2010	53	342	15
22/8/2010	50	367	14
23/8/2010	102	492	18
24/8/2010	34	383	16
25/8/2010	FGD bypassed	429	17
26/8/2010	FGD bypassed	456	20
27/8/2010	FGD bypassed	356	15
28/8/2010	*	*	*
29/8/2010	*	*	*
30/8/2010	FGD bypassed	406	19
31/8/2010	FGD bypassed	445	20

Date	Daily Maximum
Date	SO2 concentration (mg/Nm3)^#	NOx concentration (mg/Nm3)^#	Opacity (%)
1/9/2010	FGD bypassed	393	19
2/9/2010	FGD bypassed	386	20
3/9/2010	FGD bypassed	425	20
4/9/2010	FGD bypassed	427	20
5/9/2010	FGD bypassed	399	14
6/9/2010	FGD bypassed	413	24
7/9/2010	FGD bypassed	401	14
8/9/2010	FGD bypassed	457	17
9/9/2010	FGD bypassed	467	14
10/9/2010	FGD bypassed	461	20
11/9/2010	FGD bypassed	388	24
12/9/2010	FGD bypassed	443	19
13/9/2010	FGD bypassed	470	19
14/9/2010	FGD bypassed	375	11
15/9/2010	121	363	14
16/9/2010	*	*	*
17/9/2010	*	*	*
18/9/2010	64	450	14
19/9/2010	41	499	14
20/9/2010	101	443	18
21/9/2010	100	413	13
22/9/2010	98	410	18
23/9/2010	68	474	13
24/9/2010	84	344	19
25/9/2010	38	507	18
26/9/2010	28	319	12
27/9/2010	19	350	13
28/9/2010	6	353	13
29/9/2010	3	410	18
30/9/2010	2	468	11

Note: # - Hourly average value. Expressed as at 0ºC, 101.325kPa, dry and corrected to 12% CO₂ condition.

* - Unit L4 was not on load.

B.2.3 Monthly Summary of Stack SO2 for Unit L2

Date	Daily Maximum
Date	SO2 concentration (mg/Nm3)^#	Opacity (%)
1/7/2010	62	13
2/7/2010	113	13
3/7/2010	70	13
4/7/2010	59	13
5/7/2010	90	14
6/7/2010	107	13
7/7/2010	112	14
8/7/2010	77	15
9/7/2010	86	15
10/7/2010	116	16
11/7/2010	113	17
12/7/2010	89	16
13/7/2010	98	17
14/7/2010	104	16
15/7/2010	128	16
16/7/2010	115	16
17/7/2010	91	15
18/7/2010	105	14
19/7/2010	51	14
20/7/2010	123	13
21/7/2010	105	13
22/7/2010	75	13
23/7/2010	93	13
24/7/2010	FGD bypassed	16
25/7/2010	FGD bypassed	15
26/7/2010	FGD bypassed	18
27/7/2010	*	*
28/7/2010	*	*
29/7/2010	*	*
30/7/2010	*	*
31/7/2010	*	*

Date	Daily Maximum
Date	SO2 concentration (mg/Nm3)^#	Opacity (%)
1/8/2010	*	*
2/8/2010	FGD bypassed	14
3/8/2010	FGD bypassed	21
4/8/2010	FGD bypassed	21
5/8/2010	*	*
6/8/2010	*	*
7/8/2010	*	*
8/8/2010	*	*
9/8/2010	*	*
10/8/2010	*	*
11/8/2010	*	*
12/8/2010	*	*
13/8/2010	*	*
14/8/2010	*	*
15/8/2010	77	14
16/8/2010	113	13
17/8/2010	76	16
18/8/2010	120	16
19/8/2010	91	17
20/8/2010	105	16
21/8/2010	104	18
22/8/2010	117	19
23/8/2010	134	21
24/8/2010	100	20
25/8/2010	89	24
26/8/2010	106	22
27/8/2010	135	16
28/8/2010	127	15
29/8/2010	135	16
30/8/2010	127	15
31/8/2010	98	14

Date	Daily Maximum
Date	SO2 concentration (mg/Nm3)^#	Opacity (%)
1/9/2010	89	16
2/9/2010	103	17
3/9/2010	106	15
4/9/2010	116	16
5/9/2010	102	15
6/9/2010	132	16
7/9/2010	143	14
8/9/2010	143	14
9/9/2010	101	16
10/9/2010	80	16
11/9/2010	67	21
12/9/2010	144	16
13/9/2010	124	15
14/9/2010	FGD bypassed	14
15/9/2010	*	*
16/9/2010	FGD bypassed	19
17/9/2010	FGD bypassed	26
18/9/2010	FGD bypassed	28
19/9/2010	FGD bypassed	24
20/9/2010	FGD bypassed	29
21/9/2010	*	*
22/9/2010	*	*
23/9/2010	*	*
24/9/2010	*	*
25/9/2010	*	*
26/9/2010	*	*
27/9/2010	FGD bypassed	19
28/9/2010	FGD bypassed	20
29/9/2010	FGD bypassed	20
30/9/2010	FGD bypassed	21

Note: # - Hourly average value. Expressed as at 0ºC, 101.325kPa, dry and corrected to 12% CO₂ condition.

* - Unit L2 was not on load.

B.2.4 Summary of Annual Stack Particulate Sampling

Unit	Date	Results (mg/Nm³)
L2	02/07/2010	9

Monitoring Equipment: Napp model 32 (Manual stack sampling system)

B.3 Ambient SO2 and NO2 monitoring Data at Southern District and Cheung Chau

Appendix C Summary Results on Water Quality Monitoring

LAMMA POWER STATION
FGD WASTEWATER TREATMENT PLANT
EFFLUENT DISCHARGE TO ASH LAGOON
SUSPENDED SOLIDS AND PH


Period : July - September 2010

Week Ending	No. of Samples	Suspended Solids, mg/L			pH
Week Ending	No. of Samples	Maximum	Minimum	Average	Maximum	Minimum	Average
03/07/10	6*	17	13	15	7.9	7.8	7.9
10/07/10	6*	17	14	16	7.9	7.8	7.8
17/07/10	7	16	12	14	8.0	7.9	7.9
24/07/10	6*	19	12	15	8.0	7.8	7.9
31/07/10	7	18	13	15	8.0	7.9	8.0
07/08/10	5*	20	12	16	8.1	7.9	8.0
14/08/10	6*	19	14	16	8.3	8.2	8.2
21/08/10	5*	18	14	16	8.2	8.0	8.2
28/08/10	7	19	12	16	8.2	8.0	8.1
04/09/10	7	19	13	16	8.2	8.0	8.1
11/09/10	7	19	13	16	8.3	8.1	8.2
18/09/10	7	18	13	15	8.4	8.2	8.3
25/09/10	7	20	12	17	8.3	8.2	8.3

Remark :

* - No sampling for the remaining day(s) of the week / no sampling due to no discharge

LAMMA POWER STATION
FGD WASTEWATER TREATMENT PLANT
EFFLUENT DISCHARGE TO ASH LAGOON
TRACE METAL, TOTAL PHOSPHORUS
AND TOTAL NITROGEN ANALYSIS


Period : July - September 2010

Sampling date		5/7/2010	3/8/2010	7/9/2010
Barium,	ug/L	<150	<150	<150
Mercury,	ug/L	<0.5	<0.5	0.8
Cadmium,	ug/L	3	1	2
Iron,	ug/L	<400	<400	<400
Total Phosphorous,	mg/L	<0.8	<0.8	<0.8
Total Nitrogen,	mg/L	90	107	193
Cyanide,	mg/L	0.03	0.02	0.03


Remark:

According to the WPCO Ash Lagoon Discharge Licence, contents at exact
levels of trace metals below 1/10 th of the WPCO Licence permitted limits
will not be reported. When the concentration of a metal exceeds 1/10 th of
the limit, the exact value of the metal concentration will be reported.

EM&A Log Ref.	Mitigation Measures	Implementation Status
	General
A1	No other process, except the Wet Limestone-Gypsum process used in the FGD plants of the coal-fired Units L6, L7 and L8 within the Lamma Power Station, shall be used in the FGD plants for the projects unless otherwise agreed by EPD.	Complied

	Water Quality
B1	All wastewater arising from the operation of the projects shall be collected and directed to the existing wastewater treatment plant within the Lamma Power Station for treatment.	Complied
B2	The operational plant effluent from the FGD plants should be reused as much as possible in order to minimise discharge to the WWTP.	Complied
B3	Maintenance of the WWTP should be performed regularly to ensure the effluent from the WWTP would not exceed the current requirements stipulated in the WPCO licence for Ash Lagoon.	Complied

	waste
C1	No gypsum or sludge arising from the operation of the projects shall be disposed of anywhere. All gypsum and sludge shall be collected and reused.	Complied

	noise
D1	Equipments including the Absorber Recirculation Pump, Oxidation Air Blower, Booster Fan and Booster Fan Motor of the FGD plants shall be acoustically insulated and the Gas-Gas Heater (untreated side) of the FGD plants shall be provided with reinforced lagging to reduce the noise impact.	Complied

Sources of Emission	Parameter	Frequency
Steam boilers L2, L4 & L5	Particulate	Once / year
	Particulate (Opacity)	Continuous
	SO2	Continuous
	NOx expressed as NO2 (For L4 and L5 only)	Continuous
Fugitive Dust (Coal, PFA, Limestone, gypsum)	Total Suspended Particulate	Once every six days
Chimney emissions	Ambient air	Continuous at existing ambient air monitoring stations
	SO2
	NO2

Item	Parameters	Frequencies
1	pH	Daily
2	Suspended Solids	Daily
3	Iron	Monthly
4	Barium	Monthly
5	Mercury	Monthly
6	Cadmium	Monthly
7	Cyanide	Monthly
8	Total Phosphorus	Monthly
9	Total Nitrogen	Monthly

DATE	TSP CONCENTRATION (µg/m³)		WEATHER INFORMATION (from Hong Kong Observatory)
DATE	Reservoir	East Gate	Mean Wind Speed (km/hr)	Prevailing Wind Dir. ( º )	Mean R.H. (%)
04/07/2010	29	43	30.3	230	79
10/07/2010	61	26	18.4	210	76
16/07/2010	44	102	23.9	120	88
22/07/2010	32	78	35.6	120	93
28/07/2010	34	39	23.5	210	93
03/08/2010	44	38	17.9	230	76
09/08/2010	35	33	17.3	090	82
15/08/2010	27	24	13.7	210	83
21/08/2010	53	48	18.6	060	78
27/08/2010	34	22	5.3	340	78
02/09/2010	100	86	14.5	290	70
08/09/2010	44	42	16.5	250	80
14/09/2010	23	20	17.8	040	86
20/09/2010	122	147	35.2	260	82
26/09/2010	34	32	20.7	060	82

Unit was tripped due to faulty FGD Outlet damper limits switch

Turbine TVEH converter check

Boiler RH tube leakage

30% Boiler MCR light oil firing test

Unit was tripped due to faulty FGD Outlet damper limits switch

Turbine TVEH converter check

Boiler RH tube leakage

30% Boiler MCR light oil firing test