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 8

2. AIR QUALITY.. 12

2.1 Monitoring Requirements 12

2.2 Monitoring Locations 12

2.3 Monitoring Equipment 13

2.4 Monitoring Parameters, Frequency and Duration 14

2.5 Monitoring Procedures and Calibration Details 14

2.6 Results and Observations 15

3. NOISE.. 16

3.1 Monitoring Requirements 16

3.2 Monitoring Locations 16

3.3 Monitoring Equipment 17

3.4 Monitoring Parameters, Frequency and Duration 17

3.5 Monitoring Procedures and Calibration Details 17

3.6 Results and Observations 18

4. ENVIRONMENTAL AUDIT.. 21

4.1 Review of Environmental Monitoring Procedures 21

4.2 Assessment of Environmental Monitoring Results 21

4.3 Site Environmental Audit 22

4.4 Status of Environmental Licensing and Permitting 22

4.5 Implementation Status of Environmental Mitigation Measures 25

4.6 Implementation Status of Event/Action Plans 25

4.7 Implementation Status of Environmental Complaint Handling Procedures 25

5. FUTURE KEY ISSUES. 27

5.1 Status of Natural Gas supply 27

5.2 Key Issues for the Coming Month 27

5.3 Monitoring Schedules for the Next 3 Months 28

5.4 Construction Program for the Next 3 Months 29

6. CONCLUSION.. 30

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 July 2005

Table 4.3 Summary of Environmental Licensing and Permit Status

Table 4.4 Environmental Complaints / Enquiries Received in July 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 (South Cheung Chau Spoil Disposal Area)

Figure 1.4 Location of Dumping Area (East Sha Chau Contaminated Mud Disposal Site)

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 July 2005

Appendix E Noise Monitoring Results for July 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 July 2005 prepared by the Consultant as one of the ET Members

EXECUTIVE SUMMARY

This is the fifty-second 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 July 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 Building 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	Erection of HRSG, Steam Turbine, Gas Turbine, Generator, Condenser, Aux Equipment, Air duct / Inlet Filter, HRSG Inlet Duct and Piping Support / Piping Erection; Insulation Work; and Installation of Platform, Pipe Rack, Intake Aux Equipment and BOP Piping
Unit L9 Electrical, Instrumentation & Control Erection	Busduct Installation, Control Panel/Marshalling Panel/Battery & Rack Installation, Cable Tray & Earthing Installation and Cable Laying & Termination
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 N2 and N4 respectively
Gas Pipeline	Post-trenching work
Miscellaneous	Slurry ash piping & filling

Environmental Monitoring Works

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

EPD officials from Regional Office (South) visited Lamma Power Station on 27/07/2005. EPD inspected the Lamma Extension Construction Site. There was no adverse comment from EPD regarding the construction site.

Independent Environmental Checker (IEC) conducted a site inspection on 20/07/2005. 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 Gas Receiving Station area had been handed over to the Superstructure contractor and the checklist of 09/07/2005 was the last one. The site conditions were generally satisfactory. All required mitigation measures were implemented.

Environmental Licensing and Permitting

Description	Permit No.	Valid Period		Issued To	Date of Issuance
		From	To
Varied Environmental Permit	EP-071/2000/C	18/05/05	-	HEC	18/05/05
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-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-RS0242-05	29/04/05	28/09/05	Contractor	27/04/05
Construction Noise Permit	GW-RS0243-05	29/04/05	28/09/05	Contractor	27/04/05
Construction Noise Permit	GW-RS0246-05	29/04/05	09/10/05	Contractor	29/04/05
Construction Noise Permit	GW-RS0317-05	26/05/05	25/11/05	Contractor	26/05/05
Construction Noise Permit	GW-RS0318-05	26/05/05	25/11/05	Contractor	26/05/05
Construction Noise Permit	GW-RS0416-05	10/07/05	09/01/06	Contractor	30/06/05
Dumping Permit	EP/MD/05-051	01/03/05	31/08/05	Contractor	28/01/05
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/06-014	24/06/05	23/07/05	Contractor	21/06/05
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
Registration of Chemical Waste Producer	WPN4111-912-M2534-09	20/06/05	-	Contractor	20/06/05
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 about muddy water was received in the reporting month regarding the submarine cable works offshore Cyberport. The incident was found to be an accidental seepage of dredged materials and the contractor was warned to take appropriate measures to prevent it from happening again. Site supervision would also be strengthened.

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/C, 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 July 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 for the 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, Generator, Condenser, Auxiliary Equipment, Air duct / Inlet Filter, HRSG Inlet Duct, Piping Support / Piping, Insulation Work, and installation of Platform, Pipe Rack, Intake Auxiliary Equipment and BOP Piping. Construction activities for Unit L9 electrical, instrumentation & control erection were Busduct installation, Control Panel / Marshalling Panel / Battery & Rack installation, Cable Tray & Earthing installation and Cable Laying & Termination. 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 N2 and N4 respectively. The dredging/excavation of submarine cable trench outside I1 Landing Point was started in early July 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 and Figure 1.4 show the dumping locations in July 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 N2 and N4 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.
22.	Platform 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.	Pipe Rack 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.
24.	Intake Aux Equipment 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.
25.	BOP Piping 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.
Unit L9 Electrical, Instrumentation & Control Erection
26.	Busduct 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.
27.	Control Panel/ Marshalling Panel/Battery & Rack 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.
28.	Cable Tray & Earthing 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.
29.	Cable Laying & Termination	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
30.	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
31.	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 (South Cheung Chau Spoil Disposal Area)

Figure 1.4 Location of Dumping Area (East Sha Chau Contaminated Mud Disposal Site)

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

Location I.D.	Description
AM1	Reservoir
AM2	East Gate
AM3	Ash Lagoon
AM4	Tai Yuen Village

2.3 Monitoring Equipment

Continuous 24-hour TSP air quality monitoring was performed using the GS2310 High Volume Air Samplers (HVAS), Partisol Model 2000 Sampler and the MINIVOL Portable Sampler at AM1&2, AM3 and AM4 respectively. TEOM Model 1400a continuous dust monitors were used to carry out 1-hour TSP monitoring at AM1, AM2 and AM3. Table 2.2 summarises the equipment used in dust monitoring.

Table 2.2 Air Quality Monitoring Equipment

Equipment	Model and Make
24-hour sampling: HVAS Sampler Partisol Air Sampler MINIVOL Portable Sampler 1-hour sampling: Continuous TSP Dust Meter	Model GS2310 Anderson Instruments Inc. Partisol Model 2000 Rupprecht & Patashnick AIRMETRICS TEOM Model 1400a Rupprecht & Patashnick

2.4 Monitoring Parameters, Frequency and Duration

Table 2.3 summarises the monitoring parameters, duration and frequency of air quality monitoring. The monitoring schedule for the reporting month is shown in Appendix C.

Table 2.3 Air Quality Monitoring Parameter, Duration and Frequency

Monitoring Stations	Parameter	Duration	Frequency
AM1	1-hour TSP	1	3 hourly samples every 6 days
	24-hour TSP	24	Once every 6 days
AM2	1-hour TSP	1	3 hourly samples every 6 days
	24-hour TSP	24	Once every 6 days
AM3	1-hour TSP	1	3 hourly samples every 6 days
	24-hour TSP	24	Once every 6 days
AM4	24-hour TSP	24	Once every 6 days

2.5 Monitoring Procedures and Calibration Details

24- hour TSP Monitor:

Preparation of Filter Papers

· Visual inspection of filter papers was carried out to ensure that there were no pinholes, tears and creases;

· The filter papers were then labeled before sampling.

· The filter papers were equilibrated at room temperature and relative humidity < 50% for at least 24 hours before weighing.

Field Monitoring

· During collection of the sampled filter paper, the information on the elapse timer was logged. Site observations around the monitoring stations, which might have affected the monitoring results, were also recorded. Major pollution sources, if any, would be identified and reported. The flow record chart for the previous sampling was checked to see if there was any abnormality.

· The post-sampling filter papers were removed carefully from the filter holder and folded to avoid loss of fibres or dust particles from the filter papers;

· The filter holder and its surrounding were cleaned;

· A pre-weighed blank filter paper for the next sampling was put in place and aligned carefully. The filter holder was then tightened firmly to avoid leakage;

· A new flow record chart was loaded into the flow recorder;

· The programmable timer was set for the next 24 hrs sampling period, ! 1/2 hr;

· The post-sampling filter papers were equilibrated at room temperature and relative humidity < 50% for at least 24 hours before weighing.

1- hour TSP Monitor:

· The following parameters of the TEOM model dust meters are regularly checked to ensure proper functionality:

o Mass concentration;

o Total mass;

o Frequency of the tapered element;

o Electrical noise;

o Main flow;

o Auxiliary flow.

Maintenance & Calibration

· The monitoring equipment and their accessories are maintained in good working conditions.

· Monitoring equipment is calibrated at monthly intervals. Calibration details are shown in Appendix F.

2.6 Results and Observations

All dust monitoring works were conducted on schedule. All monitoring data and graphical presentation of the monitoring results are provided in Appendix D. Key findings and observations are provided below:

1-hour TSP

No exceedance of 1-hour TSP Action/Limit Level was recorded in the month.

24-hour TSP

No exceedance of 24-hour TSP Action/Limit Level was recorded in the month.

Figure 2.1 Location of Air Quality Monitoring Stations

3. NOISE

3.1 Monitoring Requirements

Continuous noise alarm monitoring at Ash Lagoon/Ching Lam were carried out to calculate the noise contributed by the construction activities at the two critical NSR’s, viz. Long Tsai Tsuen/Hung Shing Ye and the school within the village of Tai Wan San Tsuen. The impact monitoring data for construction noise were checked against the limit levels specified in the EM&A Manual. With the availability of the construction noise permits, impact monitoring for the construction work during the restricted hours was also carried out. Section 4 presents the details of the construction noise permits.

Manual noise measurements at Pak Kok Tsui residences were carried out for the construction work of Transmission System in this reporting month. The impact noise monitoring data were checked against the limit levels specified in the EM&A Manual. Appendix B shows the established Action/Limit Levels for noise.

3.2 Monitoring Locations

In accordance with the EM&A manual, the identified noise monitoring locations are listed in Table 3.1 and shown in Figure 3.1 and Figure 3.2.

Table 3.1 Noise Monitoring Locations

Purpose of noise monitoring	Monitoring Location
Lamma Extension	Ash Lagoon
Lamma Extension	Ching Lam
Transmission System	Pak Kok Tsui residences (No.2 and No.8)

3.3 Monitoring Equipment

The sound level meters used for noise monitoring complied with International Electrotechnical Commission Publications 651:1979 (Type 1) and 804:1985 (Type 1). The noise monitoring equipment used is shown in Table 3.2.

Table 3.2 Noise Monitoring Equipment

Equipment	Model
	Lamma Extension	Transmission System
Sound level meter	Rion NA-27/ B&K 2238F	Rion NL-31/ ACO 6224
Sound level calibrator	Rion NC-74	Rion NC-74/ ACO 2126

3.4 Monitoring Parameters, Frequency and Duration

Continuous alarm monitoring of A-weighted Leq levels was carried out at Ash Lagoon and Ching Lam while manual noise monitoring was conducted at Pak Kok Tsui residences. The measurement duration and parameter of noise monitoring were presented in Table 3.3 as follows:

Table 3.3 Noise Monitoring Duration and Parameter

Location	Time Period	Frequency	Parameter
Ash Lagoon Ching Lam	Daytime: 0700-1900 hrs on normal weekdays Evening-time & holidays: 0700-2300 hrs on holidays; and 1900-2300 hrs on all other days Night-time: 2300-0700 hrs of next day	Daytime: 30 minutes Evening-time & holidays: 5 minutes Night-time: 5 minutes	30-min LAeq 5-min LAeq 5-min LAeq
Pak Kok Tsui residences	0700-1900 hrs on normal weekdays	Twice per week	30-min LAeq

3.5 Monitoring Procedures and Calibration Details

Monitoring Procedures

Continuous Noise Monitoring for Lamma Extension Construction

The measured noise levels (MNL's) were collected at the noise alarm monitoring stations at Ash Lagoon and Ching Lam. The notional background noise levels (viz. baseline noise data at Ash Lagoon and Ching Lam) were applied to correct the corresponding MNL's in 30-min/5-min L_Aeq.

A wind speed sensor was installed at Station Building Rooftop. The wind speed signal was used to determine whether the data from Ash Lagoon and Ching Lam noise alarm monitoring stations were affected. The instantaneous data was discarded in case the instantaneous wind speed exceeded 10 m/s. The 30-min/5-min L_Aeq was considered valid only if the amount of valid data was equal to or above 70%.

When calibrating the noise measuring equipment, all observations around the monitoring stations, which might have affected the monitoring results, were recorded.

Manual Noise Monitoring for Transmission System Construction

Manual noise measurements were carried out at the Pak Kok Tsui residences in accordance with standard acoustical principles and practices for checking the impact of noise related to construction of the Transmission System.

Hand‑held anemometer was used to measure the wind speed while taking noise measurements. If the wind speed is excessive, noise data will be discarded and re-measured.

Equipment Calibration

The sound level meters and calibrators have been verified by the manufacturer or accredited laboratory. Equipment for continuous noise monitoring was calibrated at site on a monthly basis.

The sound level meters used for manual noise measurement were calibrated with a sound level calibrator immediately before and after noise measurement in accordance with the relevant Technical Memoranda under the Noise Control Ordinance. Calibration details are shown in Appendix F.

3.6 Results and Observations

Continuous noise monitoring was conducted at the two monitoring stations at Ash Lagoon and Ching Lam while manual noise monitoring was carried out at the Pak Kok Tsui residences.

All monitoring results and their graphical presentations are provided in Appendix E. No exceedance of noise Action/Limit Level was recorded in the month.

Figure 3.1 Location of Noise Monitoring Stations

Figure 3.2 Locations of Manual Noise Monitoring

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 Noise

The environmental monitoring results for Air Quality and Noise in the reporting month presented in sections 2, 3 and 4 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	Ambient TSP (24-hour)	01/07/05- 31/07/05	0	0
2	Ambient TSP (1-hour)	01/07/05- 31/07/05	0	0
Noise
1	Noise level at the critical NSR’s predicted by the noise alarm monitoring system	01/07/05- 31/07/05	0		0
2	Manual noise monitoring at the Pak Kok Tsui residences	01/07/05- 31/07/05	0		0

Waste Management Records

The estimated amounts of different types of waste generated in July 2005 are shown in Table 4.2.

Table 4.2 Estimated Amounts of Waste Generated in July 2005

Waste Type	Examples	Estimated Amount
Construction Waste	Concrete Waste, Used formwork, reinforcement and wooden waste	53.5 Tonne
		236.3 m^3
General Refuse	Domestic wastes collected on site	24 Tonne

4.3 Site Environmental Audit

EPD officials from Regional Office (South) visited Lamma Power Station on 27/07/2005. EPD inspected the Lamma Extension Construction Site. There was no adverse comment from EPD regarding the construction site.

IEC conducted a site inspection on 20/07/2005. The inspection result is attached in Appendix H.

Site audits were carried out by ET on a weekly basis to monitor environmental issues at the construction sites to ensure that all mitigation measures were implemented timely and properly. The Gas Receiving Station area had been handed over to the Superstructure contractor and the checklist for 09/07/2005 is the last one. The site conditions were generally satisfactory. All required mitigation measures were implemented. The weekly site inspection results are attached in Appendix H.

4.4 Status of Environmental Licensing and Permitting

All permits/licenses obtained for the project are summarised in Table 4.3.

Table 4.3 Summary of Environmental Licensing and Permit Status

Description	Permit No.	Valid Period		Highlights	Status
		From	To
Varied Environmental Permit	EP-071/2000/C	18/05/05	-	The whole construction work site	Valid
Construction Noise Permit	GW-RS0678-04	10/01/05	09/07/05	Operation of PME’s allowed during the restricted hours (07:00-23:00 on holidays and 19:00-23:00 on all other days)	Superseded
Construction Noise Permit	GW-RS0679-04	10/01/05	09/07/05	Operation of PME’s allowed during the restricted hours (07:00-23:00 on holidays and 19:00-23:00 on all other days)	Valid
Construction Noise Permit	GW-RS0097-05	21/02/05	09/08/05	Operation of PME’s allowed during the restricted hours (general holidays including Sundays between 0700-0700 hrs on next day and any day not being a holiday between 1900-0700 hrs on next day). 6 groups (A-F) of PME’s are assigned. Only one group can be used. Groups A-E are restricted to general holidays including Sundays between 0700-2300 hrs and any day not being a general holiday between 1900-2300 hrs.	Valid
Construction Noise Permit	GW-RE0018-05	25/02/05	24/08/05	Operation of PME’s allowed during the restricted hours (general holiday including Sundays between 0700-0700 hrs on next day and any day not being a general holiday between 1900-0700 hrs on next day).	Valid
Construction Noise Permit	GW-RS0013-05	25/02/05	24/08/05	Operation of PME’s allowed during the restricted hours (general holidays including Sundays between 0700-0700 hrs on next day and any day not being a holiday between 1900-0700 hrs on next day).	Valid
Construction Noise Permit	GW-RN0062-05	02/03/05	01/09/05	Operation of PME’s allowed during the restricted hours (general holiday including Sundays between 0700-0700 hrs on next day and any day not being a general holiday between 1900-0700 hrs on next day).	Valid
Construction Noise Permit	GW-RS0139-05	17/03/05	16/09/05	Operation of PME’s allowed during the restricted hours (general holidays including Sundays between 0700-2300 hrs and any day not being a general holiday between 1900-2300 hrs).	Valid
Construction Noise Permit	GW-RS0146-05	21/03/05	20/09/05	Operation of PME’s allowed during the restricted hours (any day between 2300-0700 hrs on next day).	Valid
Construction Noise Permit	GW-RS0242-05	29/04/05	28/09/05	Operation of PME’s allowed during the restricted hours (any day between 2300-0700 hrs on next day).	Valid
Construction Noise Permit	GW-RS0243-05	29/04/05	28/09/05	Operation of PME’s allowed during the restricted hours (general holidays including Sundays between 0700-2300 hrs and any day not being a general holiday between 1900-2300 hrs).	Valid
Construction Noise Permit	GW-RS0246-05	29/04/05	09/10/05	Operation of PME’s allowed during the restricted hours (general holidays including Sundays between 0700-1900 hrs and any day not being a general holiday between 1900-2100 hrs).	Valid
Construction Noise Permit	GW-RS0317-05	26/05/05	25/11/05	Operation of PME’s allowed during the restricted hours (general holidays including Sundays between 0700-2300 hrs and any day not being a general holiday between 1900-2300 hrs).	Valid
Construction Noise Permit	GW-RS0318-05	26/05/05	25/11/05	Operation of PME’s allowed during the restricted hours (any day between 2300-0700 hrs on next day).	Valid
Construction Noise Permit	GW-RS0416-05	10/07/05	09/01/06	Operation of PME’s allowed during the restricted hours (general holidays including Sundays between 0700-2300 hrs and any day not being a general holiday between 1900-2300 hrs).	Valid
Dumping Permit	EP/MD/05-051	01/03/05	31/08/05	Dumping at South Cheung Chau Disposal Area; Supply and Installation of Submarine and Land Cables	Valid
Dumping Permit	EP/MD/05-115	01/03/05	31/08/05	Dumping at South Cheung Chau Disposal Area; Supply and Installation of Submarine and Land Cables	Valid
Dumping Permit	EP/MD/05-132	04/03/05	03/07/05	Dumping at South Cheung Chau Disposal Area; Supply and Installation of Submarine Gas Pipeline	Valid
Dumping Permit	EP/MD/06-014	24/06/05	23/07/05	Dumping at East Sha Chau Contaminated Mud Disposal Site; Supply and Installation of Submarine and Land Cables	Valid
Registration of Chemical Waste Producer	WPN5213-912-P2781-07	11/06/04	-	Major Chemical Waste Type: Spent lubrication oil, waste car battery, paint or thinner contaminated container	Valid
Registration of Chemical Waste Producer	WPN5213-912-K2801-03	15/09/04	-	Major Chemical Waste Type: Spent lubricating oil, spent battery, contaminated soil with spent flammable liquid	Valid
Registration of Chemical Waste Producer	WPN5517-912-T2007-01	08/12/92	-	Major Chemical Waste Type for the construction work: lubrication oil and paints	Valid
Registration of Chemical Waste Producer	WPN5213-912-W2852-09	25/01/05	-	Major Chemical Waste Type: spent mineral oil/ lubricating oil, spent solvents, spent batteries and surplus paint	Valid
Registration of Chemical Waste Producer	WPN4111-912-M2534-09	20/06/05	-	Major Chemical Waste Type: spent insulation oil for transformer	Valid
WPCO Discharge Licence	EP890/W2/XD020	22/11/04	30/11/09	Toilet for LMX construction site	Valid

4.5 Implementation Status of Environmental Mitigation Measures

Mitigation measures detailed in the permits and the EM&A Manual (Construction Phase) are required to be implemented. An updated summary of the Environmental Mitigation Implementation Schedule (EMIS) is presented in Appendix I.

4.6 Implementation Status of Event/Action Plans

The Event/Action Plans extracted from the EM&A Manual (Construction Phase) are presented in Appendix G.

4.7 Implementation Status of Environmental Complaint Handling Procedures

In July 2005, one verbal enquiry was received as summarized in Table 4.4.

Table 4.4 Environmental Complaints / Enquiries Received in July 2005

Case Reference / Date, Time Received / Date, Time Concerned	Descriptions /Actions Taken	Conclusion / Status
Reference: PD20050027 Received: 19/07/2005 (p.m.) Concerned: 15/07/2005 (15:06)	During a helicopter flight patrol, EPD observed muddy water around a dredger offshore Cyberport. EPD found it related to the submarine cable works for this Project and requested HEC to look into the matter. The incident was found to be an accidental seepage of dredged materials and the contractor was warned to take appropriate measures to prevent it from happening again. Site supervision would also be strengthened. EPD was replied accordingly.	The incident was found to be an accidental seepage of dredged materials. Case closed.

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. FUTURE KEY ISSUES

5.1 Status of Natural Gas supply

Based on current project schedule, HEC anticipates there is no delay in the supply of natural gas.

5.2 Key Issues for the Coming Month

Key issues to be considered in the coming month include:

Unit L9 Civil and Building Works

Noise Impact

· 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 noise performance.

Air Impact

· To monitor and review the sufficiency of the dust suppression measures provided and increase the resources accordingly if necessary.

Unit L9 Mechanical Erection

Noise Impact

· To continue monitoring the noise level during construction.

· To continue executing the preventive measures for avoiding noise exceedance and keep monitoring/ reviewing the noise performance.

Air Impact

· To monitor and review the sufficiency of the dust suppression measures provided and increase the resources accordingly if necessary.

Unit L9 Electrical, Instrumentation & Control Erection

Noise Impact

· To continue monitoring the noise level during construction.

· To continue executing the preventive measures for avoiding noise exceedance and keep monitoring/ reviewing the noise performance.

Air Impact

· To monitor and review the sufficiency of the dust suppression measures provided and increase the resources accordingly if necessary.

275KV Switching Station Erection

Noise Impact

· To continue monitoring the noise level during construction.

· To continue executing the preventive measures for avoiding noise exceedance and keep monitoring/ reviewing the noise performance.

Air Impact

· To monitor and review the sufficiency of the dust suppression measures provided and increase the resources accordingly if necessary.

Transmission System

Noise Impact

· To continue monitoring the noise level during construction.

· To continue executing the preventive measures for avoiding noise exceedance and keep monitoring/ reviewing the performance.

Air Impact

· To monitor and review the sufficiency of the dust suppression measures provided and increase the resources accordingly if necessary.

Terrestrial Ecology Impact

· 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.

5.3 Monitoring Schedules for the Next 3 Months

With the completion of post-project monitoring, no further marine water quality monitoring for the reclamation works is required.

The tentative environmental monitoring schedules for the next 3 months are shown in Appendix C.

5.4 Construction Program for the Next 3 Months

The period of construction activity of slurry ash piping & filling is tentatively from August 2005 to October 2005. The tentative construction programs for the next 3 months are shown in Appendix J.

6. CONCLUSION

All monitoring work at designated stations was performed as scheduled satisfactorily. The environmental monitoring works and site inspection were performed as scheduled in the reporting month. All monitoring results were checked and reviewed.

No Action/Limit level exceedance on 1-hour and 24-hour TSP level was recorded in the reporting month.

No Action/Limit level exceedance on noise was recorded in the reporting month.

Environmental mitigation measures recommended in the EM&A manual for the construction activities were implemented in the reporting month. One enquiry about muddy water was received in the reporting month regarding the submarine cable works offshore Cyberport. The incident was found to be an accidental seepage of dredged materials and the contractor was warned to take appropriate measures to prevent it from happening again. Site supervision would also be strengthened. No prosecution was received for this Project in the reporting period.

The environmental performance of the Project was generally satisfactory.