Monthly EM&A Report

EXECUTIVE SUMMARY

This is the 130^rh 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 February 2021.

The reclamation and submarine pipeline works were completed with the first gas-fired combined cycle unit (viz. Unit L9) commissioned in October 2006, working currently on base load operation. To cope with the scheduled retirement of the existing units at Lamma Power Station, the second gas-fired combined cycle unit (viz. Unit L10) L10 was commissioned for reliable operation in February 2020. The operational EM&A work for L9 and L10 is recorded in the separate monthly EM&A report for the Project “Operation of Lamma Power Station Extension”.

In September 2016, the Government approved HK Electric to construct the third combined cycle gas-fired generating unit (L11) to implement the 2020 Fuel Mix Target. L11 is planned for commercial operation in 2022 and the associated construction work commenced in November 2016.

With the Government’s approval to build the fourth combined cycle gas-fired generating unit (L12) in July 2018, the associated construction work commenced in April 2019. When L12 is commissioned in 2023, the total gas-fired electricity generation will further rise to reach about 70% of our total output.

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 L11 Civil and Building Works	275kV Station Building Extension works, Main Station Building external works, jet grouting works, site formation works and construction of jacking pit
Unit L11 Mechanical Erection	Condenser installation, HRSG installation and turbine block installation
Unit L11 Electrical, Instrumentation & Control Erection	Cable installation
Unit L12 Civil and Building Works	Construction of pile cap and erection of tower crane (TC1) and construction of pile cap for No. 5 Chimney for Main Station Building, construction of pile cap and erection of tower crane (TC4) for ACB, pipe piling and sheet piling for No. 5 C.W. Intake and pile cap construction preparation for Cable Bridge

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

No exceedance of Action and Limit levels for noise arising from the construction of Lamma Extension was recorded in the month.

Site Environmental Audit

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

Environmental Licensing and Permitting

Description	Permit No.	Valid Period		Issued To	Date of Issuance
Description	Permit No.	From	To	Issued To	Date of Issuance
Varied Environmental Permit	EP-071/2000/D	28/09/20	-	HK Electric	28/09/20
Construction Noise Permit	GW-RS0668-20	17/09/20	13/03/21	Contractor	15/09/20
Construction Noise Permit	GW-RS0966-20	01/01/21	30/06/21	Contractor	21/12/20
Construction Noise Permit	GW-RS0039-21	01/02/21	31/07/21	Contractor	29/01/21
Construction Noise Permit	GW-RS0072-21	08/02/21	07/08/21	Contractor	05/02/21
WPCO Discharge Licence	WT00034006-2019	08/08/19	31/08/24	Contractor	22/08/19
Registration of Chemical Waste Producer	WPN5213-912-P2781-22	22/02/16	-	Contractor	22/02/16
Registration of Chemical Waste Producer	WPN5517-912-T2007-02	17/03/05	-	Contractor	17/03/05
Waste Disposal Billing Account	Account No.: 7031135	21/06/18	-	Contractor	21/06/18
Waste Disposal Billing Account	Account No.: 7027672	24/04/17	-	Contractor	24/04/17
Waste Disposal Billing Account	Account No.: 7038672	27/10/20	-	Contractor	27/10/20

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

No complaint against the construction activities was received in the reporting month.

Future Key Issues

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

Unit L11 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;

- to treat wastewater in sedimentation pit and tanks before discharge and to ensure compliance with the WPCO discharge licence already obtained.

Unit L11 Mechanical Erection

- 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 L11 Electrical, Instrumentation & Control Erection

- 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 L12 Civil and Building Works

- 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 treat wastewater in desilting pits and tanks for reuse on water spraying;

- to provide silt curtain as preventive measures at Northern Cable Bridge area.

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/D, 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. With the completion of reclamation and submarine pipeline works, no further marine water quality monitoring 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 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 February 2021.

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 L11 civil and building works were, 275kV Station Building Extension works, Main Station Building external works, jet grouting works, site formation works and construction of jacking pit. Construction activities for Unit L11 mechanical erection were condenser installation, HRSG installation and turbine block installation. Construction activity for Unit L11 electrical, instrumentation & control erection was cable installation. Construction activities for Unit L12 civil and building works were, construction of pile cap and erection of tower crane (TC1) and construction of pile cap for No.5 Chimney for Main Station Building, construction of pile cap and erection of tower crane (TC4) for ACB, pipe piling and sheeting piling for No. 5 C.W. Intake and pile cap construction preparation for Cable Bridge. Layout plan for construction site is shown in Figure 1.1.

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 L11 Civil and Building Works
1.	275kV Station Building Extension Works	Air - All regulated machine attached with valid exception/approval NRMM labels. Wastewater - Wastewater should be treated in desilting pit and tanks for reuse on water spraying. Waste Management - Scrape metal would be recycled. - Timber would be reused as much as possible. - Chemical waste should be collected by licensed collector
2.	Main Station Building external works, jet grouting works, site formation works and construction of jacking pit	Air - All regulated machine attached with valid exception/approval NRMM labels. - Water truck and water sprinkler system was used. - Excavated slope and soil stock covered with cement or tarpaulin. - Backfilled surface was compacted. - Wheel washing facility was provided. - Grout mixer and cements bags with 3 sides and top covering. Wastewater - Wastewater should be treated in desilting pit and tanks before discharge. Solution should be added to speed up the sedimentation process. Sediment in pit and tanks must be removed regularly. The frequency would be from every other day to weekly basis depends on the volume of sediment accumulated in order to maintain sufficient volume for wastewater treatment Waste Management - Excavated soil was temporary stored for backfilling. - Scrape metal would be recycled. - Timber would be reused as much as possible.
Unit L11 Mechanical Erection
3.	Condenser installation HRSG installation Turbine block installation	Air - Dust suppression measures implemented according to the EMP. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented
Unit L11 Electrical, Instrumentation & Control Erection
4.	Cable installation	Air - Dust suppression measures implemented according to the EMP. Noise - General noise mitigation measures employed at all work sites throughout the construction phase. Waste Management - Waste Management Plan submitted and implemented.
Unit L12 Civil and Building Works
5.	Unit L12 Main Station Building Construction of pile cap and erection of tower crane (TC1) Construction of pile cap for No.5 Chimney ACB Construction of pile cap and erection of tower crane (TC4) No.5 C.W. Intake Pipe piling and sheet piling	Air - All regulated machine attached with valid exception/approval NRMM labels. - Water truck, misting cannon and water sprinkler system would be used. - Water spraying for concrete breaking works. - Soil stock would be covered with cement or tarpaulin or keep the entire surface wet. - Wheel washing facility would be relocated. - Used tarpaulin screening cover for drill rig. Noise - Works conducted during restricted hours should comply with the valid CNP. - Noise emission label was provided for air compressor. Wastewater - Wastewater would be treated in desilting pits and tanks for reuse. - Improvement works for desilting system. - Silt curtain was provided as preventive measures at Northern Cable Bridge area Waste Management - Excavated soil was temporary stored for backfilling and reuse in other projects. - Scrape metal would be recycled. - Chemical waste should be collected by licensed collector.
6.	Cable Bridge: Pile Cap Construction Preparation	Air - All regulated machine attached with valid exception/approval NRMM labels. - Soil stockpile covered with tarpaulin. - Water spraying on haul road and during concrete breaking. Waste Management - Excavated soil would be stored for backfilling. Noise - Works conducted during restricted hours should comply with the valid CNP. Wastewater - Wastewater would be treated in desilting pits and tanks for reuse

1.4 Summary of EM&A Requirements

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.

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

It is agreed with EPD that continuous 24-hour TSP air quality monitoring would be performed using TEOM continuous dust monitor and the MINIVOL Portable Sampler at AM1,2&3 and AM4 respectively. TEOM 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: Continuous TSP Dust Meter MINIVOL Portable Sampler 1-hour sampling: Continuous TSP Dust Meter	TEOM continuous dust monitor Thermo Scientific AIRMETRICS TEOM continuous dust monitor Thermo Scientific

Equipment

Model and Make

24-hour sampling:

Continuous TSP Dust Meter

MINIVOL Portable Sampler

1-hour sampling:

Continuous TSP Dust Meter

TEOM continuous dust monitor

Thermo Scientific

AIRMETRICS

TEOM continuous dust monitor

Thermo Scientific

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
AM1	24-hour TSP	24	Once every 6 days
AM2	1-hour TSP	1	3 hourly samples every 6 days
AM2	24-hour TSP	24	Once every 6 days
AM3	1-hour TSP	1	3 hourly samples every 6 days
AM3	24-hour TSP	24	Once every 6 days
AM4	24-hour TSP	24	Once every 6 days

2.5 Monitoring Procedures and Calibration Details

MINIVOL (24- hour TSP Monitoring):

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 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;

· The programmable timer was set for the next 24 hrs sampling period;

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

TEOM continuous dust monitor (24- hour TSP and 1- hour TSP Monitoring):

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

o Operation Mode;

o Frequency of the tapered element;

o Main flow;

o Bypass 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.

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 3 presents the details of the construction noise permits.

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 of Ash Lagoon and Ching Lam are shown in Figure 3.1.

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 3.1.

Table 3.1 Noise Monitoring Equipment

Equipment	Model
Sound level meters	B&K 2250
Sound level calibrator	B&K 4231

3.4 Monitoring Parameters, Frequency and Duration

Continuous alarm monitoring was carried out at Ash Lagoon and Ching Lam. The measurement duration and parameter of noise monitoring were presented in Table 3.2 as follows:

Table 3.2 Noise Monitoring Duration and Parameter

Location

Time Period

Frequency

Parameter

Ash Lagoon

Ching Lam

Day-time:

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

Day-time:

30 minutes

Evening-time & holidays:

5 minutes

Night-time:

5 minutes

30-min L_Ae_q

5-min L_Ae_q

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%.

Equipment Calibration

The sound level meters and calibrators were verified by the manufacturer or accredited laboratory. With the endorsement of the Independent Environmental Checker, the enhancement of calibration of sound level meter at the noise monitoring stations was implemented. The monthly manual on-site calibration using sound level calibrator was replaced by the daily auto charge injection calibration function of the sound level meter. For additional quality assurance, manual on-site calibration would still be conducted for the noise monitoring stations once every 6 months. The manual on-site calibrations for Ash Lagoon and Ching Lam noise monitoring stations were carried out in September and October 2020 respectively. The next calibrations for the two noise monitoring stations were scheduled in March and April 2021.

3.6 Results and Observations

Continuous noise monitoring was conducted at the two monitoring stations at Ash Lagoon and Ching Lam.

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

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 and 3 respectively are summarized in Table 4.1.

Table 4.1 Summary of AL Level Exceedances on Monitoring Parameters

Item	Parameter Monitored	Monitoring Period	No. of Exceedances In			Event/Action Plan Implementation Status and Results
Item	Parameter Monitored	Monitoring Period	Action Level		Limit Level	Event/Action Plan Implementation Status and Results
Air
1	Ambient TSP (24-hour)	01/02/2021- 28/02/2021	0	0
2	Ambient TSP (1-hour)	01/02/2021- 28/02/2021	0	0
Noise
1	Noise level at the critical NSR’s predicted by the noise alarm monitoring system	01/02/2021- 28/02/2021	0		0

4.3 Waste Management

Wastes generated from this Project include inert construction and demolition (C&D) materials and non-inert C&D materials. Inert C&D materials comprise excavated materials and broken concrete. Non-inert C&D materials comprise general refuse, metals and paper/ cardboard packaging, plastics, chemical waste, etc.

Inert C&D material and non-inert C&D material disposed of in February 2021 are shown in Table 4.2.

Table 4.2 Estimated Amounts of Waste in February 2021

Total Inert C&D Waste Materials	Non-inert C&D Materials
Total Inert C&D Waste Materials	C&D Materials Recycled	C&D Waste Disposed of at Landfill	Chemical Waste
0 Tonnes	0 Tonnes	55.34 Tonnes	0 Litres

The monthly waste flow tables prepared by the contractors are attached in Appendix K

4.4 Site Environmental Audit

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 site audit findings for the reporting month are summarized in Appendix H. The site conditions were generally satisfactory. All required mitigation measures were implemented.

4.5 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
Description	Permit No.	From	To	Highlights	Status
Varied Environmental Permit	EP-071/2000/D	28/09/20	-	The whole construction work site	Valid
Construction Noise Permit	GW-RS0668-20	17/09/20	13/03/21	Civil and Building Works for Unit L11. Operation of PME during restricted hours	Valid
Construction Noise Permit	GW-RS0966-20	01/01/21	30/06/21	Power Block Facilities works for Unit L11. Operation of PME during restricted hours	Valid
Construction Noise Permit	GW-RS0039-21	01/02/21	31/07/21	Construction site for Unit L12. Operation of PME during restricted hours	Valid
Construction Noise Permit	GW-RS0072-21	08/02/21	07/08/21	Civil and Building Works for Unit L12. Operation of PME during restricted hours	Valid
WPCO Discharge Licence#	WT00034006-2019	08/08/19	31/08/24	Civil and Building Works for Unit L11	Valid
Registration of Chemical Waste Producer	WPN5213-912-P2781-22	22/02/16	-	Civil and Building Works	Valid
Registration of Chemical Waste Producer	WPN5517-912-T2007-02	17/03/05	-	E&M Equipment Installation and Maintenance	Valid
Waste Disposal Billing Account	Account No.: 7031135	21/06/18	-	Civil and Building Works for Unit L11	Valid
Waste Disposal Billing Account	Account No.: 7027672	24/04/17	-	E&M Erection of Power Block Facilities – L11	Valid
Waste Disposal Billing Account	Account No.: 7038672	27/10/20	-	Civil works for Unit L12 No.5 C.W. intake and cable bridge	Valid

Notes: # - Water quality monitoring was carried out in February 2021 and the results of which had been reported separately by the contractor.

4.6 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.

4.7 Implementation Status of Event/Action Plans

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

4.8 Implementation Status of Environmental Complaint Handling Procedures

In February 2021, no complaint against the construction activities was received.

Table 4.4 Environmental Complaints Received in February 2021

Case Reference /

Date, Time Received /

Date, Time Concerned

Descriptions /

Actions Taken

Conclusion /

Status

Nil

N/A

Table 4.5 Outstanding Environmental Complaints Carried Over

Case Reference /

Date, Time Received /

Date, Time Concerned

Descriptions /

Actions Taken

Conclusion /

Status

Nil

N/A

5. FUTURE KEY ISSUES

5.1 Key Issues for the Coming Month

Key issues to be considered in the coming month include:

Unit L11 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.

Water Impact

· To treat wastewater in sedimentation pit and tanks before discharge and to ensure compliance in accordance with the WPCO discharge licence already obtained.

Unit L11 Mechanical Erection

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 L11 Electrical, Instrumentation & Control Erection

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 L12 Civil and Building Works

Noise Impact

· 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.

Water Impact

· To treat wastewater in desilting pits and tanks for reuse on water spraying.

· To provide silt curtain as preventive measures at Northern Cable Bridge area.

5.2 Monitoring Schedules for the Next 3 Months

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

5.3 Construction Program for the Next 3 Months

The tentative construction programs for the next 3 months are shown in Appendix JAppendix J.

Unit L11 Civil and Building Works

Air

Wastewater

Waste Management

Air

Wastewater

Waste Management

Unit L11 Mechanical Erection

Air

Noise

Waste Management

- Waste Management Plan submitted and implemented

Unit L11 Electrical, Instrumentation & Control Erection

Air

Noise

Waste Management

- Waste Management Plan submitted and implemented.

Unit L12 Civil and Building Works

Air

Noise

Wastewater

Waste Management

- Excavated soil was temporary stored for backfilling and reuse in other projects.

Air

Waste Management