Contract No. SS H504 Design and Construction of Chai Wan Government Complex and Vehicle Depot

11^th Monthly EM&A Report

Yau Lee Construction Co, Ltd

2022-10-11

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Aurecon Hong Kong Limited

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223 – 231 Wai Yip Street, Kwun Tong, Kowloon

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Document control
Report title		Eleventh Monthly EM&A Report
Document ID		MMR	Project number		P520574
File path		520574-0000-PLN-NM-00012 [0]
Client		Yau Lee Construction Co, Ltd
Client contact			Client reference
Rev	Date	Revision details/status	Author	Reviewer	Verifier (if required)	Approver
0	11 October 2022	Submitted to IEC	Various	K.Chau		FL
Current revision		0

Approval
Reviewer’s signature		Approver’s signature
Name	Keith Chau	Name	Fredrick Leong
Title	Associate, Environmental	Title	Environmental Team Leader

All rights reserved | The information/data furnished in our document is confidential and competitive information proprietary to Aurecon or its subcontractors, the release of which would harm the competitive position of Aurecon or its sub-contractors/consultants. This information/data shall not be reproduced, stored in a retrieval system, transmitted in any form or by any means, used or disclosed in whole or in part, for any purpose other than to evaluate and adjudicate this document. If Aurecon is shortlisted or a contract is awarded to Aurecon as a result of this solicitation, or in connection with the submission of such information/data, the right (and the extent thereof) to reproduce, store, transmit, use or disclose this information/data must, by agreement, be included in such contract.

All rights reserved | The information/data furnished in our document is confidential and competitive information proprietary to Aurecon or its subcontractors, the release of which would harm the competitive position of Aurecon or its sub-contractors/consultants. This information/data shall not be reproduced, stored in a retrieval system, transmitted in any form or by any means, used or disclosed in whole or in part, for any purpose other than to evaluate and adjudicate this document. If Aurecon is shortlisted or a contract is awarded to Aurecon as a result of this solicitation, or in connection with the submission of such information/data, the right (and the extent thereof) to reproduce, store, transmit, use or disclose this information/data must, by agreement, be included in such contract.

Contents

Executive Summary. 1

1 Introduction. 3

2 Project Information. 4

3 Environmental Monitoring Requirements. 7

4 Implementation Status on Environmental Mitigation Measures. 11

5 Monitoring Results. 12

6 Environmental Site Inspection. 14

7 Environmental Non-conformance. 15

8 Future Key Issues. 16

9 Review of EM&A Data and EIA Predictions. 17

10 Conclusion. 18

Appendix

Appendix 1	Construction Programme
Appendix 2	Project Organization Chart and Contact Details
Appendix 3	Monitoring Programme for Reporting Period
Appendix 4	Calibration Certificates
Appendix 5	Event and Action Plan
Appendix 6	Implementation Status of Mitigation Measures
Appendix 7	Monitoring Results with Graphical Presentations
Appendix 8	Waste Flow Table
Appendix 9	Joint site inspection record for Reporting Period
Appendix 10	Monitoring Schedule for the Next Month
Appendix 11	Notification of Environmental Quality Limits Exceedance

Executive Summary

Aurecon Hong Kong Limited (Aurecon) was commissioned by the Yau Lee Construction Co, Ltd (Yau Lee) to undertake the role of Environmental Team (ET) for carrying out the environmental monitoring and audit (EM&A) works for the “Contract No. SS H504 Design and Construction of Chai Wan Government Complex and Vehicle Depot (The Project).

An Environmental Permit (EP) No. EP-505/2015 was issued by the Environmental Protection Department (EPD) on 17 December 2015 for the construction of this project based on the Environmental Impact Assessment (EIA) Report (Register No: AEIAR-191/2015) approved by the EPD. The latest EP No. EP-505/2015/A was subsequently issued by the EPD on 8 November 2019 based on the documents (including an Environmental Review Report (ERR)) for the application of Variation of Environmental Permit.

The construction phase and EM&A programme of the Project commenced on 25 November 2021.

This 11^th Monthly EM&A Report presents the EM&A works conducted from 1 September 2022 to 30 September 2022 in accordance with the EM&A Manual.

Summary of Construction Works undertaken during Report Period

The major construction works undertaken during the reporting period include:

- Pre-drilling works (Zone A & Zone B)

- Pilling works

- Tree protection works

Environmental Monitoring and Audit Progress

A summary of the monitoring activities in this reporting period is listed below:

- Construction Noise Monitoring during normal weekdays at each monitoring station	4 times
- Joint Environmental Site Inspection	5 times

Nosie

4 sets of 30-minute construction noise measurement were carried out at each monitoring stations during normal weekdays of the reporting period. No exceedance of Action and Limit Levels of construction noise was recorded during the reporting period.

Environmental Site Inspection

Joint environmental site inspections were carried out on 02, 08, 15, 22 and 30 September 2022. The joint environmental site inspection was carried out by the representatives of the Engineer's Representative (ER), the Contractor, IEC and the ET on 02 September 2022. The Contractor has generally implemented the mitigation measures as recommended.

Environmental Exceedance/Non-conformance/Compliant/Summons and Prosecution

No exceedance of the Action and Limit Levels of construction noise was recorded at designated monitoring stations during the reporting period.

No non-compliance event was recorded during the reporting period.

No environmental complaint and summons/prosecutions was received in this reporting period.

EPD participated site meeting on 2 September 2022 and no specific comment was raised. EPD conducted general site inspection on 15 and 20 September 2022. No special findings were identified during the inspection.

Future Key Issues

Works to be undertaken in the next month include:

- Tree protection works

- Piling works

- Pre-drilling works (Zone A & Zone B)

- Sheet pile installation

- ELS works

- Off-site mock up construction

Potential environmental impacts arising from the above construction activities are mainly associated with dust, construction noise, site runoff and waste management.

1 Introduction

1.1.1 Aurecon Hong Kong Limited (Aurecon) was commissioned by the Yau Lee Construction Co, Ltd (Yau Lee) to undertake the role of Environmental Team (ET) for carrying out the environmental monitoring and audit (EM&A) works for the “Contract No. SS H504 Design and Construction of Chai Wan Government Complex and Vehicle Depot (The Project).

1.2 Purpose of this Report

1.2.1 This is the eleventh EM&A report which summarises the impact monitoring results and audit findings for the EM&A programme during the reporting period from 01 September 2022 to 30 September 2022.

1.3 Structure of the Report

1.3.1 The structure of the report is as follows:

Section 1 - Introduction

- details the background, purpose and structure of the report.

Section 2 - Project Information

- summarises background and scope of the Project, site description, project organization and contact details, construction programme, the construction works undertaken and the status of Environmental Permit(s)/License(s) during the reporting period.

Section 3 - Environmental Monitoring Requirement

- summarises the monitoring parameters, monitoring programmes, monitoring methodologies, monitoring frequency, monitoring locations, Action and Limit Levels, Event/Action Plans.

Section 4 - Implementation Status on Environmental Mitigation Measures

- summarises the implementation of environmental protection measures during the reporting period.

Section 5 - Monitoring Results

- summarises the monitoring results obtained in the reporting period.

Section 6 - Environmental Site Auditing

- summarises the audit findings of the weekly site inspections undertaken within the reporting period.

Section 7 - Environmental Non-conformance

- summarises any monitoring exceedance, environmental complaints and environmental summons within the reporting period.

Section 8 - Future Key Issues

- summarises the impact forecast and monitoring schedule for the next reporting month.

Section 9 - Review of EM&A Data and EIA Predictions

- compares and contrasts the EM&A data in the month with the EIA predictions and annotates with explanation for any discrepancies.

Section 10 - Conclusions

2 Project Information

2.1 Background

2.1.1 On 5 October 2015, the Environment Impact Assessment (EIA) for the proposed “Chai Wan Government Complex and Vehicle Depot” (AEIAR-191/2015, hereafter referred to as “the Project”) was approved and an Environmental Permit (EP) (EP-505/2015) for the construction of the Project was issued. The latest EP No. EP-505/2015/A was subsequently issued by the EPD on 8 November 2019 based on the documents (including an Environmental Review Report (ERR)) for the application of Variation of Environmental Permit.

2.1.2 The construction phase and EM&A programme of the Project commenced on 25 November 2021.

2.2 Site Description

2.2.1 The scope of works of the Project, which is a Designated Project under the EIA Ordinance (EIAO), will construct joint user building comprising the government office, store, laboratory, transport pool and vehicle depot facilities in Chai Wan District. The Site is bounded by NWFB Depot to the north, Sheung On Street to the east, Sheung Mau Street to the south and Sheung Tat Street to the west. A layout plan of the Project is provided in Figure 1-1.

Figure 1-1 A layout plan of the Project

Project site

2.3 Construction Activities

2.3.1 A summary of the major construction activities undertaken in this reporting period is shown in Table 2.1 and the construction programme is illustrated in Appendix 1.

Table 2-1 Major Construction Activities Undertaken in the Reporting Period

Construction Activities Undertaken

- Pre-drilling work (Zone A & Zone B)

- Pilling work

- Tree protection works

2.4 Project Organisation

2.4.1 The Project organization chart and contact details are shown in Appendix 2.

2.5 Status of Environmental Approval Document

2.5.1 A summary of the relevant valid permits, licences, and/or notifications on environmental protection for this Project since the granting of the EP is presented in Table 2.2.

Table 2-2 Major Construction Activities Undertaken in the Reporting Period

Permit / Licenses / Notification	Reference	Validity Period	Remark
Environmental Permit (EP)	EP-505/2015/A	Throughout the Contract	Permit granted on 8 November 2019
Notification of Construction Works as required under Air Pollution Control (Construction Dust) Regulation	469716	Throughout the Contract	Approved on 21 July 2021
Registration of Waste Producer under Waste Disposal Ordinance	7041313	Throughout the Contract	Approved on 13 August 2021
Registration as Chemical Waste Producer	5213-163-Y2782-01	Throughout the Contract	Approved on 24 August 2021
Construction Noise Permit	GW-RS0245-22	13 October 2022	Approved on 14 April 2022
Effluent Discharge License under Water Pollution Control Ordinance	WT00038924-2021	30 September 2026	Approved on 9 December 2021

3 Environmental Monitoring Requirements

3.1 Nosie Monitoring Locations

3.1.1 The noise monitoring locations in approved EM&A Manual are summarised in Table 3-1 and shown in Figure 3-1.

Table 3-1 Noise Monitoring Station in Approved EM&A Manual

Noise Monitoring ID	Proposed Noise Monitoring Location	Remark
NM1	Ground Floor at Heng Fa Chuen Block 50	-
NM2b	Pedestrian road at Shing Tai Road	*
NM3	Rooftop of THEi Campus	-
Remark: * -	Hong Kong Institute of Vocational Education (Chai Wan) - Academic Block (NM2) is the noise monitoring stations for the construction phase EM&A programme as identified in the approved EM&A Manual for the Project. The access to NM2 and Knight Court (as a VTC Senior Quarters and NSR3 in approved EIA) were denied. A search for alternative noise monitoring locations along Shing Tai Road and Sheung Mau Street was carried out during the site visit on 4 October 2021. Lamp Post no. 47447 at Sheung Mau Street (NM2a), which is located between project site and original noise monitoring location, Hong Kong Institute of Vocational Education (Chai Wan) - Academic Block (NM2), is found suitable and available to be an alternative noise monitoring location for NM2. Also, NM2a, which has a direct line of sight towards project site (where construction works will be carried out and likely to have noise impacts), is located closer to project site than NM2 and thus considered as a representative noise monitoring location. Monitoring position at NM2a is proposed at 2m above ground due to security concerns and minimize the road traffic noise contribution. Noise measurement at NM2a will be considered as free-field and a correction of +3dB(A) would be made to the noise monitoring results. The alternative location of NM2a, were therefore proposed and agreed by the Independent Environmental Checker (IEC). Due to the adjustment of the location of NM2 to NM2a, the measured noise levels at NM2a would represent the noise levels at NM2. To respond to the comment raised by EPD on monitoring location of NM2a by email dated 23 May 2022 and site meeting on 6 June 2022, the monitoring location of NM2a was adjusted to the pedestrian road at Shing Tai Road (NM2b) which is located between project site and original noise monitoring location, Hong Kong Institute of Vocational Education (Chai Wan) - Academic Block (NM2). Compared with NM2a, NM2b is far away from the traffic light and therefore should be able to minimise the traffic noise issue. This arrangement was started from 28 June 2022 and has been agreed by the Independent Environmental Checker (IEC). Noise measurement at NM2b will be considered as free-field and a correction of +3dB(A) would be made to the noise monitoring results. Due to the adjustment of the location of NM2a to NM2b, the measured noise level at NM2b would represent the noise levels at NM2.

Figure 3-1 Location of Noise Monitoring Stations (NM1, NM2b and NM3)

3.2 Monitoring Parameters, Frequency and Duration

3.2.1 Weekly construction noise monitoring was conducted in accordance with the requirements stipulated in the EM&A Manual. The monitoring programme for this reporting period is shown in Appendix 3.

3.2.2 Table 3-2 summarizes the monitoring parameters, frequency and duration of the impact noise monitoring.

Table 3-2 Noise Monitoring Parameters, Period and Frequency

Time Period	Parameters
Daytime on normal weekdays (0700-1900 hrs)	Leq(30 mins), L10(5 mins) and L90(5 mins)
Evening time on all days (1900-2300 hrs) and Holidays (including Sundays) during daytime and evening (0700-2300 hrs)	Leq(5 mins), L10(5 mins) and L90(5 mins)
All days during the night-time (2300-0700 hrs of the next day)	Leq(5 mins) L10(5 mins) and L90(5 mins)

3.3 Monitoring Equipment

3.3.1 Noise measurements were conducted in accordance with the calibration and measurement procedures as stated in Annex – General Calibration and Measurement Procedures of Technical Memorandum on Noise from Construction Work other than Percussive Piling (GW-TM) issued under the Noise Control Ordinance (NCO) (Cap.400).

3.3.2 The sound level meter and calibrator used for the noise measurement, as listed in Table 3-3, complies with IEC 651: 1979 and 804:1985 (Type 1) specification. The calibration certificates of the sound level meter and calibrator are given in Appendix 4.

Table 3-3 Noise Monitoring Equipment

Sound Level Meter: Rion NL 52(s/n:@@@@@@@@);

Calibrator: Larson Davis Cal 200(s/n: @@@@@)

Sound Level Meter: Rion NL 52(s/n:@@@@@@@@);

Calibrator: Larson Davis Cal 200(s/n: @@@@@)

Monitoring Station	Monitoring Equipment (Sound Level Meter and Calibrator)
NM1	Sound Level Meter: Rion NL 52(s/n:00131627) Calibrator: Larson Davis Cal 200(s/n: 11333)
NM2b
NM3

3.3.3 Immediately prior to and following the noise measurements, the accuracy of the measurement equipment was checked using an acoustic calibrator generating a known sound pressure level at a known frequency. Measurements were accepted as the calibration level from before and after the noise measurement agree to within 1.0 d(B).

3.3.4 A portable wind speed meter shall be used for measuring wind speeds in m/s.

3.4 Event / Action Plan

Table 3-4 Action and Limit Levels for Construction Noise Monitoring

70

65 (during examination)

Applicable during 0700 – 1900 hours,

Monday to Saturday

70

65 (during examination)

Applicable during 0700 – 1900 hours,

Monday to Saturday

Monitoring Station	Action Level	Limit Level
		Noise Criteria, Leq(30mins), dB(A)	Remark
NM1	When one documented complaint is received	75	Applicable during 0700 – 1900 hours, Monday to Saturday
NM2b		70 65 (during examination)
NM3
70 65 (during examination)

Should non-compliance of the noise criteria occur, the Event and Action Plan as presented in Appendix 5 should be followed.

3.5 Mitigation Measures

3.5.1 The mitigation measures in accordance with the EP, EIA and EM&A Manual and their implementation status are presented in Appendix 6.

4 Implementation Status on Environmental Mitigation Measures

4.1.1 The Contractor has generally implemented environmental mitigation measures and requirements as stated in the EIA Report, the EP and EM&A Manual and the contract documents. The implementation status during the reporting period is summarized in Appendix 6.

4.1.2 The implemented environmental mitigation measures are listed as follow:

I. The timing and sequence of construction activities were carefully arranged.

II. QPME were used to reduce the excessive noise impact.

III. Good site practices were implemented to reduce noise impact of the site activities. The practices are listed as below:

- Use only well-maintained and regularly-serviced plant during the works;

- Turn off or throttle down the plant in intermittent use to a minimum;

- Orient the plant known to emit noise strongly in one direction to face away from the NSRs;

- Use silencers, mufflers and enclosures for plant where possible and maintain properly throughout the works;

- Site fixed plant as far away from NSRs as possible; and

- Use stockpiles of excavated materials and other structures such as site buildings effectively to screen noise from the works.

IV. Movable noise barrier/acoustic sheet barriers as noise shield will be adopted as far as practicable following the Construction Noise Management Plan (CNMP).

5 Monitoring Results

5.1 Noise

5.1.1 A total of 4 sets of 30-minute construction noise measurements were carried out at the monitoring stations (NM1, NM2b and NM3) during normal weekdays of the reporting period. The monitoring results together with graphical presentations are presented in Appendix 7. The local impacts observed near the monitoring stations were summarized below:

• NM1: Railway noise, Yau Lee Site.

• NM2b: Road traffic noise and Yau Lee Site.

• NM3: Cargo Handling Area and Yau Lee Site.

5.1.2 No exceedance of Action and Limit Levels of construction noise was recorded during the reporting period. Therefore, there was no record of Notification of Environmental Quality Limits Exceedance in the Appendix 11.

5.1.3 Baseline corrections were made when the measured noise level is higher than both the noise limit level and the baseline level, and it is made by deducting the measured noise levels with their corresponding baseline noise level. The corrected noise level (ie. Construction Noise Level) would solely represent the noise levels of Construction works.

5.1.4 The methodology is shown as below:

· When Measured noise level (Leq 30mins) > Baseline noise level (Leq30), Construction noise level is calculated

· Construction noise level = Measured noise level (Leq 30 mins) – Baseline noise level

· If Measured noise level (Leq 30mins) < Baseline noise level, Corrected noise level = Measured noise level

5.1.5 No baseline correction was made in the reporting period.

5.2 Waste Management

5.2.1 Wastes generated from this Project include inert construction and demolition (C&D) materials and non-inert C&D materials. Non-inert C&D materials were made up of general refuse, steels and paper/cardboard packaging materials. Steel materials generated from the Project were also grouped into non-inert C&D materials as the materials were not disposed of with other inert C&D materials. With reference to relevant handling records and trip tickets of this Project, the quantities of different types of waste generated in the reporting period are summarised in Appendix 8. The non-inert C&D materials and general refuse generated from the Project were disposed of at the NENT Landfill. A total of 8.32 tonnes of general refuse was generated during the reporting period. The inert C&D materials generated from the Project were disposed of at the Chai Wan Public Fill Barging Point (CW-PFBP) or Fill Bank at Tseung Kwan O Area 137(TKO137FB). A total of 5305.27 tonnes of inert waste was generated during the reporting period.

6 Environmental Site Inspection

6.1.1 Joint environmental site inspection was conducted in the reporting period on 02, 08, 15, 22 and 30 September 2022. The joint environmental site inspection was carried out by the representatives of the Engineer's Representative (ER), the Contractor, IEC and the ET on 02 September 2022. The joint environmental site inspection record is shown in Appendix 9. There was no noncompliance recorded during the site inspections.

6.1.2 Major findings and recommendations are summarized as follows:

02 September 2022

• Empty fuel container was randomly stored. The Contractor was reminded to properly disposal empty fuel container.

08 September 2022

• An oil container was observed without drip tray. The Contractor was reminded to provide drip tray.

15 September 2022

• The stockpile of excavated material was observed dry and dusty. The Contractor was reminded to cover the stockpile with impervious sheet to minimize dust dispersion.

22 September 2022

• Hardcopy of EP and CNP were not observed at the relocated site entrance. The Contractor was reminded to post the hardcopy of EP and CNP at the site entrance.

• Oil spillage was observed under the mobile crane. Oil spillage shall be cleared and disposed of as chemical waste.

• Work area near the site boundary was observed dusty. The Contractor was reminded to schedule watering in work area to prevent dust dispersion to the public road.

30 September 2022

• More than 20 bags of cement were not covered entirely with impervious sheets. The Contractor was reminded to cover bags of cement entirely for dust screening.

7 Environmental Non-conformance

7.1 Summary of Monitoring Exceedance

7.2 No exceedance of the Action and Limit Levels of construction noise was recorded at monitoring station during the reporting period.

7.3 Summary of Environmental Non-compliance

7.3.1 No non-compliance event was recorded during the reporting period.

7.4 Summary of Environmental Complaint

7.4.1 No complaint was received during the reporting period.

7.5 Summary of Environmental Summons and Successful Prosecution

7.5.1 No summons was received during the reporting period.

8 Future Key Issues

8.1 Key Issues for the Coming Month

8.1.1 Works to be undertaken for the coming monitoring periods are summarized below:

- Tree protection works

- Piling works

- Pre-drilling works (Zone A & Zone B)

- Sheet pile installation

- ELS works

- Off-site mock up construction

8.1.2 Potential environmental impacts arising from the above construction activities are mainly associated with dust, construction noise, site runoff and waste management.

8.2 Monitoring Schedule for the Next Month

8.2.1 The tentative schedule of noise monitoring for the next reporting period is presented in Appendix 10.

8.3 Construction Programme for the Next Month

8.3.1 The most updated construction programme for the Project is presented in Appendix 1.

9 Review of EM&A Data and EIA Predictions

9.1 Noise

9.1.1 The EIA predicted the construction noise levels during the day-time period. In this reporting period, hoarding erection and piling works were conducted. Hence, a comparison between the measured noise results in this reporting month and predicted EIA noise levels was made. (Table 9-1).

Table 9-1 Comparison between the measured noise results and EIA predictions

Monitoring Station	EIA Predicted Construction Noise Levels, dB(A)	Baseline Noise Levels, dB(A)	Noise Monitoring Results, dB(A)
			Leq(30mins), Average	Range
NM1	62	65.1	63.3	61-66
NM2b	69	73.4	71.0*	70-73*
NM3	66	69.8	68.0	66-69

Note: *The measured noise levels exceeded the limit noise level and they were lower than the baseline level for NM2b. Therefore, they were not considered as an exceedance of limit level. As such the EAP was not triggered.

9.1.2 The comparison shows that the average of 30-minute construction noise levels recorded at all monitoring stations during the reporting period were higher than the EIA predicted construction noise levels but lower than the baseline noise levels. Recommended mitigation measures in Section 5.8 of EIA will be implemented throughout the construction period.

9.2 Waste Management

9.2.1 The estimated amount of waste generated in this Project and the accumulated quantities of waste generated up to this reporting month are presented in Appendix 8. No major construction works have commenced in this reporting month. The amount of construction waste generated are minimal. Recommended mitigation measures in Section 8.5 of the EIA will be implemented during the construction stage.

9.3 Conclusion of Review

9.3.1 The EIA predictions against the monitoring results since the commencement of construction works have been reviewed. The EIA concluded that the Project would not cause adverse impacts to the environment, and the monitoring results have also indicated the same so far. Mitigation measures recommended in the EP, EIA, EM&A Manual and the contract documents will continue to be implemented throughout the construction phase of the Project.

10 Conclusion

10.1.1 For construction noise, no Action and Limit Level exceedance was recorded at the monitoring stations during the reporting period.

10.1.2 Environmental site inspection was carried out on 02, 08, 15, 22 and 30 September 2022. Recommendations on remedial actions were given to the Contractors for the deficiencies identified during the site inspections.

10.1.3 EPD participated site meeting on 2 September 2022 and no comment was raised. EPD conducted general site inspection on 15 and 20 September 2022. No special findings were identified during the inspection.

10.1.4 No notification of summons and prosecution was received during the reporting period.

10.1.5 The ET will keep track on the EM&A programme to ensure compliance of environmental requirements and the proper implementation of all necessary mitigation measures.

Appendix 1

Appendix 2
Appendix 3
Appendix 4

Appendix 5

Appendix 6

Appendix 7

Appendix 8

Appendix 9

Appendix 10

Appendix 11

There was no Notification of Environmental Quality Limits Exceedance in the reporting month.

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Aurecon Hong Kong Limited

Unit 1608, 16/F, Tower B, Manulife Financial Centre,

223 – 231 Wai Yip Street, Kwun Tong,

Kowloon Hong Kong S. A. R.

T: +852 3664 6888

F: +852 3664 6999

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