COVER

Table of Content

EXECUTIVE SUMMARY

1. INTRODUCTION.. 1

1.1 Background 1

1.2 Project Organisation 1

1.3 Construction Works undertaken during the Reporting Month 1

1.4 Summary of EM&A Requirements 7

2. AIR QUALITY.. 10

2.1 Monitoring Requirements 10

2.2 Monitoring Locations 10

2.3 Monitoring Equipment 11

2.4 Monitoring Parameters, Frequency and Duration 12

2.5 Monitoring Procedures and Calibration Details 12

2.6 Results and Observations 13

3. NOISE.. 14

3.1 Monitoring Requirements 14

3.2 Monitoring Locations 14

3.3 Monitoring Equipment 15

3.4 Monitoring Parameters, Frequency and Duration 15

3.5 Monitoring Procedures and Calibration Details 15

3.6 Results and Observations 16

4. ENVIRONMENTAL AUDIT.. 19

4.1 Review of Environmental Monitoring Procedures 19

4.2 Assessment of Environmental Monitoring Results 19

4.3 Site Environmental Audit 20

4.4 Status of Environmental Licensing and Permitting 20

4.5 Implementation Status of Environmental Mitigation Measures 23

4.6 Implementation Status of Event/Action Plans 23

4.7 Implementation Status of Environmental Complaint Handling Procedures 23

5. FUTURE KEY ISSUES. 25

5.1 Status of Natural Gas supply 25

5.2 Key Issues for the Coming Month 25

5.3 Monitoring Schedules for the Next 3 Months 26

5.4 Construction Program for the Next 3 Months 27

6. CONCLUSION.. 28

List of Tables

Table 1.1 Construction Activities and Their Corresponding Environmental Mitigation Measures

Table 2.1 Air Quality Monitoring Locations

Table 2.2 Air Quality Monitoring Equipment

Table 2.3 Air Quality Monitoring Parameter, Duration and Frequency

Table 3.1 Noise Monitoring Locations

Table 3.2 Noise Monitoring Equipment

Table 3.3 Noise Monitoring Duration and Parameter

Table 4.1 Summary of AL Level Exceedances on Monitoring Parameters

Table 4.2 Estimated Amounts of Waste Generated in May 2005

Table 4.3 Summary of Environmental Licensing and Permit Status

Table 4.4 Environmental Complaints / Enquiries Received in May 2005

Table 4.5 Outstanding Environmental Complaints / Enquiries Carried Over

List of figures

Figure 1.1 Layout of Work Site

Figure 1.2 Cable Route of Transmission System

Figure 1.3 Location of Dumping Area

Figure 2.1 Location of Air Quality Monitoring Stations

Figure 3.1 Location of Noise Monitoring Stations

Figure 3.2 Location of Manual Noise Monitoring

Appendices

Appendix A Organization Chart

Appendix B Action and Limit Levels for Air Quality and Noise

Appendix C Environmental Monitoring Schedule

Appendix D Air Quality Monitoring Results for May 2005

Appendix E Noise Monitoring Results for May 2005

Appendix F The QA/QC Procedures and Results

Appendix G Event/Action Plans

Appendix H Site Audit Summary

Appendix I Summary of EMIS

Appendix J Tentative Construction Programme

Appendix K Supply and Installation of Submarine Gas Pipeline – Monthly EM&A Report for May 2005 prepared by the Consultant as one of the ET Members

EXECUTIVE SUMMARY

This is the fiftieth monthly Environmental Monitoring and Audit (EM&A) report for the Project “Construction of Lamma Power Station Extension” prepared by the Environmental Team (ET). This report presents the results of impact monitoring on air quality and noise for the said project in May 2005.

After successful completion of post-project monitoring in September 2002, no further marine water quality monitoring for the reclamation works would be required.

Air and noise monitoring were performed. The results were checked against the established Action/Limit (AL) levels. An on-site audit was conducted once per week. The implementation status of the environmental mitigation measures, Event/Action Plan and environmental complaint handling procedures were also checked.

Construction Activities Undertaken

Construction activities for Lamma Extension during the reporting month are tabulated as follows:

Item	Construction Activities
Unit L9 Civil and Build Works	Main Station Building, 275kV Switching Station, Shunt Reactor, Chimney, Drainage, Fire Services Water Tank and Fire Pump House, C.W. Culvert System, C.W. Equipment Room, and Lamma Power Station Addition and Alteration (LPS A&A) Works
Unit L9 Mechanical Erection	HRSG Erection, Steam Turbine Erection, Gas Turbine Erection, Generator Erection, Condenser Erection, Aux Equipment Erection, Air duct / Inlet Filter, HRSG Inlet Duct, Piping Support / Piping Erection and insulation work
Unit L9 Electrical, Instrumentation & Control Erection	6.6 kV & 415V Switchgear, 415V Motor Control Centre (MCC), 380V Distribution Board (D/B), Auxiliary Transformer (Aux Tx), Charger & UPS and Cable Tray Installation
275kV Switching Station Erection	Materials Delivery & Installation of GIS and Shunt Reactors
Transmission System	Site formation work and tunnel excavation at the Lamma Power Station Cable Duct No.1, cable landing points N2, N4 & N5, filling of quarry spall, Type 2 and Type 1 rockfill at I1, N2, N4 & N5 respectively
Gas Pipeline	Pipe laying and trenching
Miscellaneous	Slurry ash piping & filling

Environmental Monitoring Works

One (1) air quality environmental monitoring work was rescheduled as shown in the following table.

Monitoring work	Original Schedule	Makeup sampling	Reasons
24 hour TSP monitoring at AM1	25/05/2005	27/05/2005	Failure of TSP Sampler

Other than this, all monitoring work at designated stations was performed as scheduled satisfactorily.

Air Quality

No exceedance of Action/Limit levels on 1-hour TSP and 24-hour TSP for air quality was recorded in the month.

Noise

Construction work for Lamma Extension was carried out during the restricted hours including evening-time, holidays and night-time under valid Construction Noise Permits. No exceedance of Action and Limit levels for noise arising from the construction of Lamma Extension and transmission system was recorded in the month.

Site Environmental Audit

Independent Environmental Checker (IEC) conducted a site inspection on 18/05/2005. The inspection result is attached in Appendix H.

Site audits were carried out on a weekly basis to monitor environmental issues on the construction site. The site conditions were generally satisfactory. All required mitigation measures were implemented.

As the dredging work for formation of underwater trenches for transmission system has partially been completed on 11/8/2004 and will be suspended until June 2005, there will be no site audit for the underwater trenches work during this period.

Environmental Licensing and Permitting

Description	Permit No.	Valid Period		Issued To	Date of Issuance
		From	To
Varied Environmental Permit	EP-071/2000/B	13/07/01	-	HEC	13/07/01
Varied Environmental Permit	EP-071/2000/C	18/05/05	-	HEC	18/05/05
Construction Noise Permit	GW-RS0668-04	06/01/05	02/07/05	Contractor	06/01/05
Construction Noise Permit	GW-RS0669-04	06/01/05	02/07/05	Contractor	06/01/05
Construction Noise Permit	GW-RS0678-04	10/01/05	09/07/05	Contractor	07/01/05
Construction Noise Permit	GW-RS0679-04	10/01/05	09/07/05	Contractor	06/01/05
Construction Noise Permit	GW-RS0084-05	16/02/05	02/08/05	Contractor	16/02/05
Construction Noise Permit	GW-RS0097-05	21/02/05	09/08/05	Contractor	18/02/05
Construction Noise Permit	GW-RE0018-05	25/02/05	24/08/05	Contractor	07/02/05
Construction Noise Permit	GW-RS0013-05	25/02/05	24/08/05	Contractor	21/02/05
Construction Noise Permit	GW-RN0062-05	02/03/05	01/09/05	Contractor	01/03/05
Construction Noise Permit	GW-RS0139-05	17/03/05	16/09/05	Contractor	17/03/05
Construction Noise Permit	GW-RS0146-05	21/03/05	20/09/05	Contractor	21/03/05
Construction Noise Permit	GW-RS0246-05	29/04/05	09/10/05	Contractor	29/04/05
Dumping Permit	EP/MD/05-115	01/03/05	31/08/05	Contractor	22/02/05
Dumping Permit	EP/MD/05-132	04/03/05	03/07/05	Contractor	03/03/05
Dumping Permit	EP/MD/06-002	09/05/05	08/06/05	Contractor	22/04/05
Registration of Chemical Waste Producer	WPN5213-912-P2781-07	11/06/04	-	Contractor	11/06/04
Registration of Chemical Waste Producer	WPN5213-912-K2801-03	15/09/04	-	Contractor	15/09/04
Registration of Chemical Waste Producer	WPN5517-912-T2007-01	08/12/92	-	Contractor	08/12/92
Registration of Chemical Waste Producer	WPN5213-912-W2852-09	25/01/05	-	Contractor	25/01/05
WPCO Discharge Licence	EP890/W2/XD020	22/11/04	30/11/09	Contractor	22/11/04

Implementation Status of Environmental Mitigation Measures

Environmental mitigation measures for the construction activities as recommended in the EM&A manual were implemented in the reporting month.

Environmental Complaints

One enquiry on the noise generated by the construction activities was received in the reporting month and it was shortly settled. There was no non-compliance with the relevant requirements.

Future Key Issues

The future key issues to be considered in the coming month are as follows:

Unit L9 Civil and Building Works

- to continue monitoring the noise level during construction and to ensure compliance with the CNP’s already obtained;

- to continue executing the preventive measures for avoiding noise exceedance and keep monitoring/ reviewing the performance;

- to monitor and review the sufficiency of the dust suppression measures provided and increase the resources accordingly if necessary;

Unit L9 Mechanical Erection

- to continue monitoring the noise level during construction

- to continue executing the preventive measures for avoiding noise exceedance and keep monitoring/ reviewing the performance;

- to monitor and review the sufficiency of the dust suppression measures provided and increase the resources accordingly if necessary;

Unit L9 Electrical Erection

- to continue monitoring the noise level during construction

- to continue executing the preventive measures for avoiding noise exceedance and keep monitoring/ reviewing the performance;

- to monitor and review the sufficiency of the dust suppression measures provided and increase the resources accordingly if necessary;

275KV Switching Station Erection

- to continue monitoring the noise level during construction

- to continue executing the preventive measures for avoiding noise exceedance and keep monitoring/ reviewing the performance;

- to monitor and review the sufficiency of the dust suppression measures provided and increase the resources accordingly if necessary;

Transmission System

- to continue monitoring the noise level during construction;

- to continue executing the preventive measures for avoiding noise exceedance and keep monitoring/ reviewing the performance;

- to monitor and review the sufficiency of the dust suppression measures provided and increase the resources accordingly if necessary;

- to closely monitor the construction activities in order to avoid disturbance to the rare plants;

- to provide temporary fire fighting equipment for prevention of fire within the work sites.

Concluding Remarks

The environmental performance of the project was generally satisfactory.

1. INTRODUCTION

1.1 Background

The Environmental Team (hereinafter called the “ET”) was formed within the Hongkong Electric Co. Ltd (HEC) to undertake Environmental Monitoring and Audit for “Construction of Lamma Power Station Extension” (hereinafter called the “Project”). Under the requirements of Section 6 of Environmental Permit EP-071/2000/B, an EM&A programme for impact environmental monitoring set out in the EM&A Manual (Construction Phase) is required to be implemented. In accordance with the EM&A Manual, environmental monitoring of air quality, noise and water quality and regular environmental audits are required for the Project. As the post-project marine water monitoring was successfully completed in September 2002, no further water quality monitoring for the reclamation works would be required.

The Project involves the construction of a gas-fired power station employing combined cycled gas turbine technology, forming an extension to the existing Lamma Power Station. The key elements of the Project including the construction activities associated with the transmission system and submarine gas pipeline are outlined as follows.

· dredging and reclamation to form approximately 22 hectares of usable area;

· construction of six 300MW class gas-fired combined cycle units;

· construction of a gas receiving station;

· construction of a new transmission system linking the Lamma Extension to load centres on Hong Kong Island;

· laying of a gas pipeline for the supply of natural gas to the new power station

This report summarizes the environmental monitoring and audit work for the Project for the month of May 2005.

1.2 Project Organisation

An Environmental Management Committee (EMC) has been set up in HEC to oversee the Project. The management structure includes the following:

· Environmental Protection Department (The Authority);

· Environmental Manager (The Chairman of the Environmental Management Committee);

· Engineer;

· Independent Environmental Checker (IEC);

· Environmental Team (ET);

· Contractor.

The project organisation chart for the construction EM&A programme is shown in Appendix A.

1.3 Construction Works undertaken during the Reporting Month

Construction activities for Unit L9 civil and building works were the for Main Station Building, 275kV Switching Station, Shunt Reactor, Chimney, Drainage, Fire Services Water Tank and Fire Pump House, C.W. Culvert System, C.W. Equipment Room and LPS A&A Works. Construction activities for Unit L9 mechanical works were the erection of HRSG, Steam Turbine, Gas Turbine Erection, Generator, Condenser, Auxiliary Equipment, Air duct / Inlet Filter, HRSG Inlet Duct, Piping Support / Piping and insulation work. Construction activities for Unit L9 electrical, instrumentation & control erection were 6.6 kV & 415V Switchgear, 415V MCC, 380V D/B, Aux Tx, Charger & UPS and Cable Tray installation. The construction activities for 275KV Switching Station erection were materials delivery & installation of GIS and Shunt Reactors. Construction activities for Unit L9’s associated transmission system were site formation work and tunnel excavation at the Lamma Power Station Cable Duct No.1, cable landing points N2, N4 & N5, and filling of quarry spall, Type 2 and Type 1 rockfill at I1, N2, N4 & N5 respectively. The underwater trenches work has partially been completed on 11/8/2004 and will be suspended until June 2005. A separate monthly EM&A report for submarine pipeline prepared by the consultant, as one of ET members, is shown in Appendix K. Uncontaminated materials were dumped at the assigned location within the South Cheung Chau Spoil Disposal Area. Layout plans for construction site and transmission system are shown in Figure 1.1 and Figure 1.2 respectively. Figure 1.3 shows the dumping location in May 2005.

The main construction activities carried out during the reporting month and the corresponding environmental mitigation measures are summarized in Table 1.1. The implementation of major mitigation measures in the month is provided in Appendix I.

Table 1.1 Construction Activities and Their Corresponding Environmental Mitigation Measures

Item	Construction Activities	Environmental Mitigation Measures
Unit L9 Civil and Building Works
1	Main Station Building	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
2	275kV Switching Station	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
3	Shunt Reactor	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
4	Chimney	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
5	Drainage Works	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
6	Fire Services Water Tank and Fire Pump House	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
7	C.W. Culvert System	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
8	C.W. Equipment Room	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
9	LPS A&A Works	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
Construction of Transmission System
10	Site formation work and tunnel excavation at the Lamma Power Station Cable Duct No.1, cable landing points N2, N4 & N5	Air Quality - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Terrestrial Ecology - Special care and close monitoring to avoid disturbances to the rare plant species. - Temporary fire fighting equipment provided within the work area during construction.
11	Filling of quarry spall, Type 2 and Type 1 rockfill at I1, N2, N4 and N5 respectively	Noise - General noise mitigation measures employed at all work sites throughout the construction phase.
Unit L9 Mechanical Erection
12	HRSG Erection	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
13	Steam Turbine Erection	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
14	Gas Turbine Erection	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
15	Generator Erection	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
16	Condenser Erection	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
17	Auxiliary Equipment Erection	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
18	Air duct / Inlet Filter	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
19	HRSG Inlet Duct	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
20	Piping Support / Piping Erection	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
21	Insulation Work	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
Unit L9 Electrical, Instrumentation & Control Erection
22	6.6 kV & 415V Switchgear, 415V MCC, 380V D/B, Aux Tx, Charger & UPS Installation	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
23	Cable Tray Installation	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
275kV Switching Station Erection
24	Materials Delivery & Installation of GIS and Shunt Reactors	Air - Dust suppression measures implemented. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
Miscellaneous
25	Slurry ash piping & filling	Noise - General noise mitigation measures implemented and silent type equipment deployed.

1.4 Summary of EM&A Requirements

The EM&A program requires environmental monitoring for air, noise and water quality. As the post-project marine water monitoring was successfully completed in September 2002, no further water quality monitoring for the reclamation works would be required. The detailed EM&A monitoring work for air quality and noise are described in Sections 2 and 3 respectively. Regular environmental site audits for air quality, noise, water quality and waste management were carried out.

The following environmental audits are summarized in Section 4 of this report:

· Environmental monitoring results;

· Waste Management Records;

· Weekly site audit results;

· The status of environmental licensing and permits for the Project;

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

Future key issues will be reported in Section 5 of this report.

Figure 1.1 Layout of Work Site

Figure 1.2 Cable Route of Transmission System

Figure 1.3 Location of Dumping Area

2. AIR QUALITY

2.1 Monitoring Requirements

1-hour and 24-hour TSP monitoring at agreed frequencies were conducted to monitor air quality. The impact monitoring data were checked against the Action/Limit Levels as determined in the Baseline Monitoring Report (Construction Phase). Appendix B shows the established Action/Limit Levels for Air Quality.

2.2 Monitoring Locations

Three dust monitoring locations were selected for 1-hour TSP sampling (AM1, AM2 & AM3) while four monitoring locations were selected for 24-hour TSP sampling (AM1, AM2, AM3 and AM4). Table 2.1 tabulates the monitoring stations. The locations of the monitoring stations are shown in Figure 2.1.

Table 2.1 Air Quality Monitoring Locations