Contract No: HY/2019/18

 

Wanchai Development Phase II and Central Wanchai Bypass

Sampling, Field Measurement and Testing Works (Stage 4)

 

ENVIRONMENTAL PERMIT NO. EP-364/2009/H,

FURTHER EVIRONMENTAL PERMIT NOS. FEP-01/364/2009, EP-02/364/2009, FEP-03/364/2009, FEP-04/364/2009/A, FEP-05/364/2009/A, FEP-06/364/2009/A, FEP-07/364/2009/H, FEP-08/364/2009/A, FEP-09/364/2009/B, FEP-10/364/2009/B, FEP-11/364/2009/E AND  FEP-12/364/2009/D

 

Final environmental monitoring & audit report


CLIENTS:

PREPARED BY:

 

 

Civil Engineering and Development

Department

 

and

 

Highways Department

 

Lam Geotechnics Limited

 

19/F, Remex Centre

42 Wong Chuk Hang Road,

H.K.

 

Telephone: (852) 2882-3939

Facsimile: (852) 2882-3331

E-mail: info@lamenviro.com

Website: http://www.lamenviro.com

 

 

 

 

 

Certified by:



 

 

 

 

 

                                               

Raymond Dai

Environmental Team Leader

 

 

22 November 2023

 

 

 

 

 


Table of contents

 

1  Introduction.. 1

1.1      Scope of the Report 1

1.2      Structure of the Report 1

2  Project Background.. 2

2.1      Background. 2

2.2      Scope of the Project and Site Description.. 2

2.3      Division of the Project Responsibility. 3

2.4      Project Organization and Contact Personnel 4

3     Monitoring Requirements.. 5

3.1      Noise Monitoring. 5

3.2      Air Quality Monitoring. 7

4.     Monitoring Results.. 10

4.1      Noise Monitoring Results. 10

4.2      Air Quality Monitoring Results. 15

4.3      Waste Monitoring Results. 18

5.     Environmental Site Audit.. 21

5.1      Landscape Monitoring. 21

6.  Complaints, Notification of Summons and Prosecution.. 23

7.     Conclusion.. 24

7.1    Construction of the Project 24

7.2    EM&A Programme. 24

 

 

 

lIST OF FIGUREs

 

Figure 2.1     Project Layout

Figure 3.1    Locations of Environmental Monitoring Stations

 

 

lIST OF APPENDIces

 

Appendix 3.0    Layouts of Representative Noise and Air Sensitive Receivers

Appendix 3.1    Action and Limit Level

Appendix 4.1    Event Action Plans

Appendix 4.2    Noise Monitoring Graphical Presentations

Appendix 4.3    Real-time Noise Monitoring Graphical Presentations

Appendix 4.4    Air Quality Monitoring Graphical Presentations

Appendix 4.5    Water Quality Monitoring Graphical Presentations

Appendix 5.1    Environmental Mitigation Implementation Schedule

Appendix 6.1    Complaint Log

 

 

 


EXECUTIVE SUMMARY

       i.        This is the Final Environmental Monitoring and Audit (EM&A) Review Report prepared by Lam Geotechnics Limited for Wan Chai Development Phase II and Central-Wan Bypass íV Sampling, Field Measurement and Testing work under EM&A manual for Environmental Permit no. EP-364/2009. This report presents the environmental monitoring and audit findings during the period of September 2010 to October 2023.

 

Major construction works under taken during construction phase monitoring programme

      ii.        The study area encompasses existing developments from Central to North Point. The scope of the Central-Wanchai Bypass (CWB) and Island Eastern Corridor Link (IECL) includes:

íP          A dual three-lane trunk road, approximately 4.5 km in length, and tunnel approximately 3.7 km in length defined from the connection with the existing Rumsey

íP          Street Flyover in Central, through to a connection with the existing Island Eastern

íP          Corridor to the east of the Causeway Bay Typhoon Shelter (CBTS);

íP          Central Interchange near the Rumsey Street Flyover to provide road connections

íP          to the Central area;

íP          Tunnel control buildings and ventilation buildings;

íP          Slip roads to connect the CWB to the local road system in the Wan Chai North and

íP          Causeway Bay area;

íP          Associated road lighting, road signing, traffic control and surveillance system; and

íP          Other associated works.

     iii.        The project also contains various Schedule 2 DPs that, under the EIAO, require Environmental Permits (EPs) to be granted by the DEP before they may be either constructed or operated.  Below table summarises the individual DPs under this Project.

Item

Designated Project

EIAO Reference

DP1

Central-Wanchai Bypass (CWB) including its road tunnel and slip roads

Schedule 2, Part I, A.1 and A.7

DP2

Road P2 and other roads which are classified as primary/district distributor roads

Schedule 2, Part I, A.1

DP3

Construction of CWB including its road tunnel and slip roads on the land formed by reclamation works

Schedule 2, Part I, C.1 and C.12

 

     iv.        Due to the multi-contract nature of the Project, there were a number of contracts sub-dividing the whole works area into different work areas. The details of individual contracts are summarized in table below.


 

Contract No.

Contract Title

Associated DP(s)

Construction Commencement

Contract Completion Date

HY/2009/17

Central-Wan Chai Bypass (CWB) at FEHD Whitfield Depot íV Advanced piling works.

DP1

5 October 2010

24 April 2014

04/HY/2006

Reconstruction of Bus Terminus near Man Yiu Street and Man Kwong Street

DP1

September 2010

11 February 2011

HY/2009/18

Central-Wan Chai Bypass (CWB) íV Central Interchange

DP1

21 April 2011

1 November 2018

HK/2009/01

Wan Chai Development Phase II íV Central íV Wan Chai Bypass at Hong Kong Convention and Exhibition Centre íV Tunnel Works

DP1, DP2

25 August 2011

31 May 2016

HK/2009/02

Wan Chai Development Phase II íV Central íV Wan Chai Bypass at Wan Chai East (CWB Tunnel)

DP1

26 April 2011

31 December 2018

HY/2009/15

Central-Wanchai Bypass íV Tunnel (Causeway Bay Typhoon Shelter Section)

DP1

13 July 2011

30 September 2016

 

HY/2009/19

Central-Wanchai Bypass Tunnel (North Point Section) and Island Eastern Corridor Link

DP1

24 March 2011

30 August 2021

HK/2010/06

Wan Chai Development Phase II-Central-Wan Chai Bypass over MTR Tsuen Wan Line

DP3

22 March 2011

7 September 2014

HK/2012/08

Wan Chai Development Phase II- Central-Wan Chai Bypass at Wan Chai West

DP1, DP2, DP3

10 March 2014

23 November 2019

HY/2010/08

Central-Wanchai Bypass Tunnel íV Tunnel (Slip Road 8)

DP1, DP2, DP3

21 March 2013

13 December 2022

HY/2011/08

Central-Wan Chai Bypass (CWB) íVTunnel Buildings, Systems and Fittings, and Works Associated with Tunnel Commissioning

DP1

8 October 2014

28 October 2022

Remarks: SCL Contractor has granted FEP-13/364/2009/H on 2 June 2020 to undertake the construction of part of the slip road 3 under EP364. EM&A works associated with FEP-13/364/2009/H shall be implemented and reported by a separate ET/IEC of SCL Contractor.

 

Environmental Monitoring and Audit Works

      v.        Summary table of the impact monitoring activities is listed below:

Noise Monitoring Station

Commencement Date

Suspension Date

M1a íV Harbour Road Sports Centre / Footbridge for Harbour Road Sports Centre

M1b íV Rooftop of Wan Chai Ferry Pier (alternative to M1a due to Shatin Central Link construction)

26 April 2011

23 December 2020

M2b íV Noon Gun Area

14 July 2011

22 March 2021

M3a íV Tung Lo Wan Fire Station

24 March 2011

22 March 2021

M4b íV Victoria Centre

24 March 2011

11 February 2022

M5b íV City Garden

24 March 2011

15 July 2022

M6 íV HK Baptist Church Henrietta Secondary School

24 March 2011

15 July 2022

M7e- International Finance Centre (Eastern End of Podium) (as reference to M8 since 7 August 2012)

30 August 2010

16 June 2020

M7w íV International Finance Centre (Western End of Podium)

30 August 2010

16 June 2020

M7a - Harbour Building (resumed to original baseline location since 7 July 2020)

30 August 2010

24 May 2021

M8 íV City Hall

7 August 2012

16 June 2020

 

Real-time Noise Monitoring Station

Commencement Date

Suspension Date

RTN1 íV FEHD Hong Kong Transport Section Whitefield Depot

05 October 2010

27 July 2022

RTN2 íV Oil Street Community Liaison Centre

RTN2a íV Electric Centre (alternative to RTN2 due to relocation of Community Liaison Centre)

24 March 2011

27 July 2022

RTN3 - Po Leung Kuk Yu Lee Mo Fan Memorial School

6 October 2012

27 July 2022

RTN4 - Causeway Bay Community Centre

13 January 2013

27 July 2022

 


Air Quality Monitoring Station

Commencement Date

Suspension Date

CMA1b íVOil Street Community Liaison Centre / site office / Harbour Grand Hotel Boundary Wall (alternative to CMA1a due to relocation of Oil Street site office)

26 March 2011

12 March 2021

CMA2a íV Causeway Bay Community Centre

8 October 2010

11 February 2022

CMA3a íV CWB PRE Site Office

14 July 2011

22 March 2021

CMA4a íV Society for the Prevention of Cruelty to Animals

26 April 2011

23 December 2020

CMA5a / CMA5b íV Children Playgrounds opposite to Pedestrian Plaza / Pedestrian Plaza

25 August 2011

20 July 2020

MA1e íV International Finance Centre (Eastern End of Podium)

9 September 2010

16 June 2020

MA1w íV International Finance Centre (Western End of Podium)

MA1b íV Habour Building (resumed to original baseline location for MA1w since 17 July 2020)

9 September 2010

16 June 2020

 

24 May 2021

 

Waste Management

     vi.        Wastes generated from this Project include inert construction and demolition (C&D) materials and non-inert C&D materials. Details of waste management data is presented in Section 4.4.

 

Complaints, Notifications of Summons and Successful Prosecutions

    vii.        Total 119 nos. environmental complaints were received in the reporting period. Total 13nos. notification of summons and successful prosecutions were received in the reporting period. The summary of complaint received shall refer to Section 6.

 

 Site Inspections and Audit

   viii.        The weekly site inspections were conducted according to EM&A manual requirement throughout the construction period. No non-compliance from the site audits was recorded throughout the reporting period.

 

 Conclusion

     ix.        The EM&A programme were found to be effective in monitoring impacts arising from the Project. The findings of the environmental monitoring program suggest that no adverse impacts on sensitive receivers at the designated monitoring locations were brought about the Project.

      x.        In conclusion the Project was environmentally acceptable in terms of air quality and noise impact.

 


1      Introduction

1.1          Scope of the Report

1.1.1.     Lam Geotechnics Limited (LGL) has been appointed to work as the Environmental Team (ET) under Environmental Permit no. EP-364/2009/H and Further Environmental Permit (FEP) nos. FEP-01/364/2009, FEP-02/364/2009, FEP-03/364/2009 FEP-04/364/2009/A FEP-05/364/2009/A, FEP-06/364/2009/A, FEP-07/364/2009/G, FEP-08/364/2009/A FEP-09/364/2009/B, FEP-10/364/2009/B, FEP-11/364/2009/E and FEP-12/364/2009/D to implement the Environmental Monitoring and Audit (EM&A) programme as stipulated in the EM&A Manual of the approved Environmental Impact Assessment (EIA) Report for Wan Chai Development phase II and Central-Wan Chai Bypass (Register No.: AEIAR-125/2008) and in the EM&A Manual of the approved EIA Report for Central-Wan Chai Bypass and Island Eastern Corridor Link (Register No. AEIAR-041/2001).

1.1.2.     SCL Contractor has granted FEP-13/364/2009/H on 2 June 2020 to undertake the construction of part of the slip road 3 under EP364. EM&A works associated with FEP-13/364/2009/H shall be implemented and reported by a separate ET/IEC of SCL Contractor.

1.1.3.     This report presents the environmental monitoring and audit findings during the period of September 2010 to October 2023 for the works under the FEPs as listed in Section 1.1.1.

 

1.2          Structure of the Report

Section 1        Introduction íV details the scope and structure of the report.

Section 2        Project Background íV summarizes background and scope of the project, site description, project organization and contact details of key personnel during the reporting period.

Section 3        Monitoring Requirements íV summarizes all monitoring parameters, monitoring methodology and equipment, monitoring locations, monitoring frequency, criteria and respective event and action plan and monitoring programmes.

Section 4        Monitoring Results íV summarizes the monitoring results and exceedances recorded throughout the monitoring programme.

Section 5        Environmental Site Audit íV summarizes the findings of site inspections undertaken during the construction period, with a review of any relevant follow-up actions during the construction period.

Section 6        Complaints, Notification of summons and Prosecution íV summarizes the cumulative statistics on complaints, notification of summons and prosecution.

Section 7        Conclusion

2      Project Background

2.1          Background

2.1.1.     ížWan Chai Development phase II and Central-Wan Chai BypassíĘ and ížCentral-Wan Chai Bypass and Island Eastern Corridor LinkíĘ (hereafter called ížthe ProjectíĘ) are Designed Project (DP) under the Environmental Impact Assessment Ordinance (Cap. 499) (EIAO). The Environmental Impact Assessment (EIA) Reports for Central-Wan Chai Bypass and Island Eastern Corridor Link (Register No. AEIAR-041/2001) and Wan Chai Development phase II and Central-Wan Chai Bypass (Register No.: AEIAR-125/2008) have been approved on 31 August 2001 and 11 December 2008 respectively.

2.1.2.     The key purpose of Wan Chai Development Phase II (WDII) is to provide land at Wan Chai North and North Point for construction of the Central-Wan Chai Bypass and Island Eastern Corridor Link (CWB). Land formed under the project will be developed as a world-class waterfront promenade joining that at the new Central waterfront for public enjoyment.

2.1.3.     There is a compelling and present need for the CWB to provide relief to the very congested east-west Connaught Road Central / Harcourt Road / Gloucester Road Corridor (the Corridor) which is currently operating beyond its capacity. The CWB will provide relief to the existing congestion along the Corridor and cater for the anticipated growth of traffic on Hong Kong Island. Without the CWB and its access roads, there will not be sufficient capacity to serve the heavy traffic demands at both strategic and local levels.

2.2          Scope of the Project and Site Description

2.2.1.     Design and Construction of Central íV Wan Chai Bypass and Island Eastern Corridor Link under the Project involves the construction and operation of a trunk road and its road tunnel more than 800m in length between portals that is shown in Figure 2.1.

2.2.2.     The study area encompasses existing developments from Central to North Point. The scope of the Central-Wanchai Bypass (CWB) and Island Eastern Corridor Link (IECL) includes:

íP          A dual three-lane trunk road, approximately 4.5 km in length, and tunnel approximately 3.7 km in length defined from the connection with the existing Rumsey

íP          Street Flyover in Central, through to a connection with the existing Island Eastern

íP          Corridor to the east of the Causeway Bay Typhoon Shelter (CBTS);

íP          Central Interchange near the Rumsey Street Flyover to provide road connections

íP          to the Central area;

íP          Tunnel control buildings and ventilation buildings;

íP          Slip roads to connect the CWB to the local road system in the Wan Chai North and

íP          Causeway Bay area;

íP          Associated road lighting, road signing, traffic control and surveillance system; and

íP          Other associated works.

2.2.3.     The project also contains various Schedule 2 DPs that, under the EIAO, require Environmental Permits (EPs) to be granted by the DEP before they may be either constructed or operated. Table 2.1 summarises the three individual DPs under this Project. Figure 2.1 shows the locations of these Schedule 2 DPs.

Table 2.1      Schedule 2 Designated Projects under this Project

Item

Designated Project

EIAO Reference

DP1

Central-Wanchai Bypass (CWB) including its road tunnel and slip roads

Schedule 2, Part I, A.1 and A.7

DP2

Road P2 and other roads which are classified as primary/district distributor roads

Schedule 2, Part I, A.1

DP3

Construction of CWB including its road tunnel and slip roads on the land formed by reclamation works

Schedule 2, Part I, C.1 and C.12

 

2.3          Division of the Project Responsibility

2.3.1.     Due to the multi-contract nature of the Project, there were a number of contracts sub-dividing the whole works area into different work areas. The details of individual contracts are summarized in Table 2.2.

Table 2.2 Details of Individual Contracts under the Project

Contract No.

Contract Title

Associated DP(s)

Construction Commencement

Contract Completion Date

HY/2009/17

Central-Wan Chai Bypass (CWB) at FEHD Whitfield Depot íV Advanced piling works.

DP1

5 October 2010

24 April 2014

04/HY/2006

Reconstruction of Bus Terminus near Man Yiu Street and Man Kwong Street

DP1

September 2010

11 February 2011

HY/2009/18

Central-Wan Chai Bypass (CWB) íV Central Interchange

DP1

21 April 2011

1 November 2018

HK/2009/01

Wan Chai Development Phase II íV Central íV Wan Chai Bypass at Hong Kong Convention and Exhibition Centre íV Tunnel Works

DP1, DP2

25 August 2011

31 May 2016

HK/2009/02

Wan Chai Development Phase II íV Central íV Wan Chai Bypass at Wan Chai East (CWB Tunnel)

DP1

26 April 2011

31 December 2018

HY/2009/15

Central-Wanchai Bypass íV Tunnel (Causeway Bay Typhoon Shelter Section)

DP1

13 July 2011

30 September 2016

 

HY/2009/19

Central-Wanchai Bypass Tunnel (North Point Section) and Island Eastern Corridor Link

DP1

24 March 2011

30 August 2021

HK/2010/06

Wan Chai Development Phase II-Central-Wan Chai Bypass over MTR Tsuen Wan Line

DP3

22 March 2011

7 September 2014

HK/2012/08

Wan Chai Development Phase II- Central-Wan Chai Bypass at Wan Chai West

DP1, DP2, DP3

10 March 2014

23 November 2019

HY/2010/08

Central-Wanchai Bypass Tunnel íV Tunnel (Slip Road 8)

DP1, DP2, DP3

21 March 2013

13 December 2022

HY/2011/08

Central-Wan Chai Bypass (CWB) íVTunnel Buildings, Systems and Fittings, and Works Associated with Tunnel Commissioning

DP1

8 October 2014

28 October 2022

 

2.4          Project Organization and Contact Personnel

2.5.1.     Civil Engineering and Development Department and Highways Department are the overall project controllers for the Wan Chai Development Phase II and Central-Wan Chai Bypass respectively. For the construction phase of the Project, Project Engineer, Contractor(s), Environmental Team and Independent Environmental Checker are appointed to manage and control environmental issues.

2.5.2.     The proposed project organization, key parties and roles are summarized in Table 2.3:

Table 2.3 Contact Details of Key Parties and Roles

Party

Role

AECOM

EngineeríŽs Representative for WDII (CEDD contracts)

 

EngineeríŽs Representative for CWB (HyD contracts)

Lam Woo & CO., LTD.

Contractor of Contract no. HY/2009/17

 

Contractor of Contract no. 04/HY/2006

Leighton Contractors (Asia) Limited

Contractor of Contract no. HY/2009/18

Chun Wo íV Leader Joint Venture

Contractor of Contract no. HK/2009/01

Chun Wo íV CRGL Joint Venture

Contractor of Contract no. HK/2009/02

China State Construction Engineering (HK) Ltd.

Contractor of Contract no. HY/2009/15

 

Contractor of Contract no. HY/2010/08

Chun Wo - CRGL - MBEC Joint Venture

Contractor under Contract no. HY/2009/19

Gammon-Leader JV

Contractor of Contract no.HK/2010/06

China State-Build King Joint Venture

Contractor of Contract no. HK/2012/08

Leighton Joint Venture

Contractor of Contract no. HY/2011/08

Ramboll Hong Kong Limited

Independent Environmental Checker (IEC)

Lam Geotechnics Limited

Environmental Team (ET)

 

3         Monitoring Requirements

3.1          Noise Monitoring

Noise Monitoring Stations

3.1.1.     The noise monitoring stations for the Project are listed in Table 3.1 and shown in Figure 3.1. Corresponding noise sensitive receivers as identified in EIA can be referred to Appendix 3.0.  Appendix 3.1 shows the established Action/Limit Levels for the monitoring works.

Table 3.1a     Noise Monitoring Station

Station

Description

M1a* / M1b**

Harbour Road Sports Centre / Footbridge for Harbour Road Sports Centre (M1a)

Rooftop of Wan Chai Ferry Pier (M1b, alternative to M1a due to Shatin Central Link construction)

M2b

Noon Gun Area

M3a

Tung Lo Wan Fire Station

M4b

Victoria Centre

M5b

City Garden

M6

HK Baptist Church Henrietta Secondary School

M7e***

International Finance Centre (Eastern End of Podium)

M7w / M7a

International Finance Centre (Western End of Podium, M7w)

Harbour Building (resumed to original baseline location as M7a since 7 July 2020)

M8***

M8 íV City Hall

Remark*: With respect to the demolition of Ex-Harbour Road Sports Centre, the respective noise monitoring station M1a íV Harbour Road Sports Centre were finely adjusted to the Footbridge for Harbour Road Sports after May 2017.

Remark**: The monitoring station M1a was relocated as M1b íV Rooftop of Wan Chai Ferry Pier on 2 November 2020.

Remark***: Impact monitoring station referred M8 (City Hall) with M7e as reference station since 7 Aug 2012.

3.1.2.     The noise monitoring stations for the Project are listed and shown in Table 3.2 and Figure 3.1. Appendix 3.1 shows the established Action/Limit Levels for the monitoring works.

Table 3.1b    Real Time Noise Monitoring Station

District

Station

Description

Tin Hau

RTN1

FEHD Hong Kong Transport Section Whitefield Depot

North Point

RTN2 / RTN2a*

Oil Street Community Liaison Centre / Electric Centre

North Point

RTN3

Po Leung Kuk Yu Lee Mo Fan Memorial School

Tin Hau

RTN4

Causeway Bay Community Centre

Remark*: RTN2 was relocated from Oil Street Community Liaison Centre to Electric Centre on 05 Oct 2012 and re-designated as RTN2a.

Remark**: RTN3 Yu Lee Mo Fan Memorial School was temporary suspended from 30 January 2020 to 31 November 2020 due to public health concern.

Noise Monitoring Parameters, Frequency and Duration

3.1.3.     The construction noise level was measured in terms of the A-weighted equivalent continuous sound pressure level (Leq). Leq (30 minutes) was used as the monitoring parameter for the time period between 0700 and 1900 hours on normal weekdays. For all other time periods, Leq (5 minutes) was employed for comparison with the Noise Control Ordinance (NCO) criteria. Supplementary information for data auditing, statistical results such as L10 and L90 were also obtained for reference.

3.1.4.     Noise monitoring was carried out at all the designated monitoring stations. The monitoring frequency depended on the scale of the construction activities. The following is an initial guide on the regular monitoring frequency for each station on a weekly basis when noise generating activities were underway:

íP          One set of measurements between 0700 and 1900 hours on normal weekdays.

3.1.5.     If construction works were extended to include works during the hours of 1900 íV 0700 as well as public holidays and Sundays, additional weekly impact monitoring was carried out during respective restricted houríŽs periods.

 

Monitoring Equipment

3.1.6.     As referred to the Technical Memorandum ™ issued under the NCO, sound level meters in compliance with the International Electrotechnical Commission Publications 651: 1979 (Type 1) and 804: 1985 (Type 1) specifications were used for carrying out the noise monitoring. Immediately prior to and following each noise measurement the accuracy of the sound level meter was checked using an acoustic calibrator generating a known sound pressure level at a known frequency. Measurements were accepted as valid only if the calibration level from before and after the noise measurement agree to within 1.0 dB.

3.1.7.     Noise measurements was not carried out in fog, rain, wind with a steady speed exceeding 5 m/s or wind with gusts exceeding 10 m/s. The wind speed was checked with a portable wind speed meter capable of measuring the wind speed in m/s.

 


3.2          Air Quality Monitoring

Air Quality Monitoring Stations

3.2.1.     The air monitoring stations for the Project are listed in Table 3.2 and shown in Figure 3.1. Corresponding air sensitive receivers as identified in EIA can be referred to Appendix 3.0.  Appendix 3.1 shows the established Action/Limit Levels for the monitoring works.

Table 3.2 Air Monitoring Station

Station ID

Monitoring Location

Description

CMA1a / CMA1b*

Oil Street Community Liaison Centre / site office

CMA1b íV Harbour Grand Hotel Boundary Wall (alternative to CMA1a due to relocation of Oil Street site office)

North Point

CMA2a

Causeway Bay Community Centre

Causeway Bay

CMA3a

CWB PRE Site Office

Causeway Bay

CMA4a

Society for the Prevention of Cruelty to Animals

Wan Chai

CMA5a /  CMA5b**

Children Playgrounds opposite to the Pedestrian Plaza / Pedestrian Plaza

Wan Chai

MA1e

International Finance Centre (Eastern End of Podium)

Central

MA1w

International Finance Centre (Western End of Podium)

Central

MA1b

Harbour Building

Central

Remarks *: Due to extension of site boundary by Contractor HY/2009/19, location of CMA1b at Oil Street Community Liaison Centre has been finely adjusted on 21 April 2012 and the ID was updated as Oil Street Site Office from April 2013. CMA1b was adjusted from Oil Street site office to Harbour Grand Hotel Boundary Wall on June 2017 w.r.t demolition of Oil Street Site Office.

Remarks **: Station CMA5a at Children Playgrounds opposite to the Pedestrian Plaza was relocated to the Pedestrian Plaza in December 2014. The station reference and location ID CMA5a was updated as CMA5b and Pedestrian Plaza respectively. The proposal for relocation was submitted to EPD by CEDD on 24 November 2014 and approved by EPD on 10 December 2014.

 

Air Monitoring Parameters, Frequency and Duration

3.2.2.     One-hour and 24-hour TSP levels were measured to indicate the impacts of construction dust on air quality. The 24-hour TSP level was measured by following the standard high volume sampling method as set out in the Title 40 of the Code of Federal Regulations, Chapter 1 (Part 50), Appendix B.

3.2.3.     All relevant data including temperature, pressure, weather conditions, elapsed-time meter reading for the start and stop of the sampler, identification and weight of the filter paper, and any other local atmospheric factors affecting or affected by site conditions, etc., were recorded down in detail.

3.2.4.     For regular impact monitoring, the sampling frequency of at least once in every six-days, was strictly observed at all the monitoring stations for 24-hour TSP monitoring. For 1-hour TSP monitoring, the sampling frequency of at least three times in every six-days was undertaken when the highest dust impact occurred.

 

Sampling Procedure and Monitoring Equipment

3.2.5.     High volume samplers (HVSs) in compliance with the following specifications were used for carrying out the 1-hour and 24-hour TSP monitoring:

íP          0.6 íV 1.7 m3 per minute adjustable flow range;

íP          equipped with a timing / control device with +/- 5 minutes accuracy for 24 hours operation;

íP          installed with elapsed-time meter with +/- 2 minutes accuracy for 24 hours operation;

íP          capable of providing a minimum exposed area of 406 cm2;

íP          flow control accuracy: +/- 2.5% deviation over 24-hour sampling period;

íP          equipped with a shelter to protect the filter and sampler;

íP          incorporated with an electronic mass flow rate controller or other equivalent devices;

íP          equipped with a flow recorder for continuous monitoring;

íP          provided with a peaked roof inlet;

íP          incorporated with a manometer;

íP          able to hold and seal the filter paper to the sampler housing at horizontal position;

íP          easily changeable filter; and

íP          capable of operating continuously for a 24-hour period.

3.2.6.     Initial calibration of dust monitoring equipment was conducted upon installation and thereafter at bi-monthly intervals. The transfer standard was traceable to the internationally recognized primary standard and be calibrated annually. The concern parties such as IEC was properly document the calibration data for future reference. All the data was converted into standard temperature and pressure condition.

 

Laboratory Measurement / Analysis

3.2.7.     A clean laboratory with constant temperature and humidity control, and equipped with necessary measuring and conditioning instruments to handle the dust samples collected, was available for sample analysis, and equipment calibration and maintenance. The laboratory was HOKLAS accredited.

3.2.8.     An alternative non-HOKLAS accredited laboratory was set-up for carrying out the laboratory analysis, the laboratory equipment was approved by the ER on 8 February 2011 and the measurement procedures were witnessed by the IEC. Any measurement performed by the laboratory was demonstrated to the satisfaction of the ER and IEC. IEC was regularly audit to the measurement performed by the laboratory to ensure the accuracy of measurement results.

3.2.9.     Filter paper of size 8íĘ x 10íĘ was labelled before sampling. It was a clean filter paper with no pinholes, and conditioned in a humidity-controlled chamber for over 24-hours and pre-weighed before used for the sampling.

3.2.10.   After sampling, the filter paper loaded with dust was kept in a clean and tightly sealed plastic bag. The filter paper was then returned to the laboratory for reconditioning in the humidity controlled chamber followed by accurate weighing by an electronic balance with readout down to 0.1 mg. The balance was regularly calibrated against a traceable standard.

3.2.11.   All the collected samples were kept in a good condition for 6 months before disposal.

 

4.         Monitoring Results

4.0.1.     The Event Action Plan for construction noise, air quality and water quality are presented in Appendix 4.1.

 

4.1              Noise Monitoring Results

4.1.1.     The noise monitoring limit level exceedances in reporting period is summarized in Table 4.1 below.

Table 4.1a Summary of noise limit level exceedances

Year

Limit level

M1a / M1b

M2b

M3a

M4b

M5b

M6

M7e / M8

M7w / M7a

Total

2010

Non-Project related

-

-

-

-

-

-

0

0

0

Project related

-

-

-

-

-

-

0

0

2011

Non-Project related

0

0

0

0

0

0

0

0

0

Project related

0

0

0

0

0

0

0

0

2012

Non-Project related

0

0

0

0

0

19

3

0

22

Project related

0

0

0

0

0

0

0

0

2013

Non-Project related

2

0

0

0

0

35

0

0

39

Project related

0

0

0

0

0

2

0

0

2014

Non-Project related

0

0

0

0

0

19

0

1

23

Project related

0

2

0

0

0

1

0

0

2015

Non-Project related

5

0

0

0

0

6

0

0

13

Project related

0

0

0

0

0

2

0

0

2016

Non-Project related

17

0

0

0

0

8

0

0

25

Project related

0

0

0

0

0

0

0

0

2017

Non-Project related

14

0

0

0

0

12

0

0

31

Project related

3

0

0

0

1

1

0

0

2018

Non-Project related

4

0

0

0

0

3

0

0

9

Project related

1

0

0

0

0

1

0

0

2019

Non-Project related

0

0

0

2

0

6

0

0

8

Project related

0

0

0

0

0

0

0

0

2020

Non-Project related

0

0

0

4

0

0

0

0

4

Project related

0

0

0

0

0

0

0

0

2021

Non-Project related

-

0

0

0

0

0

-

-

0

Project related

-

0

0

0

0

0

-

-

2022

Non-Project related

-

-

-

0

0

0

-

-

0

Project related

-

-

-

0

0

0

-

-

 

Table 4.1b Summary of real-time noise limit level exceedances

Year

Limit level

RTN1

RTN2 / RTN2a

RTN3

RTN4

Total

2010

Non-Project related

0

0

0

0

0

Project related

0

0

0

0

2011

Non-Project related

0

0

0

0

0

Project related

0

0

0

0

2012

Non-Project related

1

2

0

0

3

Project related

0

0

0

0

2013

Non-Project related

11

24

5

4

44

Project related

0

0

0

0

2014

Non-Project related

13

42

8

5

68

Project related

0

0

0

0

2015

Non-Project related

2

29

9

19

59

Project related

0

0

0

0

2016

Non-Project related

1

51

16

12

94

Project related

0

11

0

3

2017

Non-Project related

2

32

9

4

47

Project related

0

0

0

0

2018

Non-Project related

1

3

16

2

42

Project related

0

0

20

0

2019

Non-Project related

52

4

26

5

94

Project related

0

0

0

7

2020

Non-Project related

28

2

10

1

42

Project related

0

0

0

1

2021

Non-Project related

20

0

33

0

57

Project related

0

0

0

4

2022

Non-Project related

1

10

5

0

16

Project related

0

0

0

0

 

4.1.2.     The major construction activities involved site preparation and piling works in 2010 (since Sep 2010). No limit level exceedance was recorded in scheduled noise monitoring and real-time noise monitoring in the reporting period. No action level exceedance were confirmed from noise complaints received in the reporting period.

4.1.3.     The major construction activities involved ELS works for basement construction for pile cap construction, diaphragm wall construction, road and drainage diversion & construction, tunnel bored pile works and sheet-piling for box culvert in 2011. No limit level exceedance was recorded in scheduled noise monitoring and real-time noise monitoring in the reporting period. No action level exceedance were confirmed from noise complaints received in the reporting period.

4.1.4.     The major construction activities involved pile cap construction, diaphragm wall construction, road and drainage construction, bridge construction, tunnel bored pile & excavation works and box culvert construction in 2012. Total 22 and 3 limit level exceedances were recorded in scheduled noise monitoring and real-time noise monitoring in the reporting period. After the investigation, the exceedances were concluded as non-project related and contributed by nearby traffic noise.  Total 1 action level exceedance related to noise complaint was recorded in the reporting period.

4.1.5.     The major construction activities involved diaphragm wall construction, road and drainage construction, bridge construction and demolition, tunnel bored pile & excavation works and box culvert construction in 2013. Total 39 and 44 limit level exceedances were recorded in scheduled noise monitoring and real-time noise monitoring in the reporting period. After the investigation, 2 out of the 39 limit level exceedances were concluded as project related, others were concluded as non-project related and contributed by nearby traffic noise or non-WDII CWB construction works. In general, the contractor implemented the remediation measures in according to Event and Action Plan and the cases were closed. No action level exceedance related to noise complaint was recorded in the reporting period.

4.1.6.     The major construction activities involved diaphragm wall construction, tunnel bored pile & excavation works, bridge construction and demolition, road and drainage construction, box culvert construction, noise barrier/enclosure installation, pipe piling & grouting works and utility diversion works in 2014. Total 23 and 68 limit level exceedances were recorded in scheduled noise monitoring and real-time noise monitoring in the reporting period. After the investigation, 3 out of the 23 limit level exceedances were concluded as project related, others were concluded as non-project related and contributed by nearby traffic noise or non-WDII CWB construction works. In general, the contractor implemented the remediation measures in according to Event and Action Plan and the cases were closed. Total 3 action level exceedances related to noise complaint were recorded in the reporting period.

4.1.7.     The major construction activities involved diaphragm wall construction, tunnel bored pile & excavation works, CWB top slab backfilling works, bridge construction and demolition, pile-cap and pier construction, road and drainage construction, box culvert construction, noise barrier/enclosure installation, pipe piling & grouting works and utility diversion works, and ventilation building & shaft construction in 2015. Total 13 and 59 limit level exceedances were recorded in scheduled noise monitoring and real-time noise monitoring in the reporting period. After the investigation, 2 out of the 13 limit level exceedances were concluded as project related, others were concluded as non-project related and contributed by nearby traffic noise or non-WDII CWB construction works. In general, the contractor implemented the remediation measures in according to Event and Action Plan and the cases were closed. Total 2 action level exceedances related to noise complaint were recorded in the reporting period.

4.1.8.     The major construction activities involved diaphragm wall removal, tunnel and approach ramp construction, CWB top slab backfilling works, bridge construction and demolition, pre-bored piling & excavation works, road and drainage construction, noise barrier/enclosure installation, grouting works, utility diversion works, retaining wall works, ventilation building & shaft construction and landscape works in 2016. Total 25 and 94 limit level exceedances were recorded in scheduled noise monitoring and real-time noise monitoring in the reporting period. After the investigation, 14 out of the 94 limit level exceedances were concluded as project related, others were concluded as non-project related. No action level exceedance related to noise complaint was recorded in the reporting period.

4.1.9.     The major construction activities involved tunnel and approach ramp construction, CWB top slab backfilling works, bridge construction and demolition, pre-bored piling & excavation works, road and drainage construction, noise barrier/enclosure installation, utility diversion works, retaining wall works, ventilation building & shaft construction and landscape works in 2017. Total 31 and 47 limit level exceedances were recorded in scheduled noise monitoring and real-time noise monitoring in the reporting period. After the investigation, 5 out of the 31 limit level exceedances were concluded as project related, others were concluded as non-project related and contributed by nearby traffic noise. In general, the contractor implemented the remediation measures in according to Event and Action Plan and the cases were closed. No action level exceedance related to noise complaint was recorded in the reporting period.

4.1.10.   The major construction activities involved tunnel and approach ramp construction, CWB top slab backfilling works, bridge construction and demolition, pre-bored piling & excavation works, road and drainage works, box culvert construction, noise barrier/enclosure installation, utility diversion works, retaining wall works, ventilation building & shaft construction and landscape works in 2018. Total 9 and 42 limit level exceedances were recorded in scheduled noise monitoring and real-time noise monitoring in the reporting period. After the investigation, 2 out of the 9 limit level exceedances and 20 out of the 42 limit level exceedances were concluded as project related, others were concluded as non-project related and contributed by nearby traffic noise. In general, the contractor implemented the remediation measures in according to Event and Action Plan and the cases were closed. No action level exceedance related to noise complaint was recorded in the reporting period.

4.1.11.   The major construction activities involved backfilling works, bridge construction, road and drainage works, noise barrier/enclosure installation, utility diversion works, ABWF works for ventilation building & shaft, testing & commissioning of CWB tunnel and landscape works in 2019. Total 8 and 94 limit level exceedances were recorded in scheduled noise monitoring and real-time noise monitoring in the reporting period. After the investigation, 7 out of the 94 limit level exceedances were concluded as project related, others were concluded as non-project related. No action level exceedance related to noise complaint was recorded in the reporting period.

4.1.12.   The major construction activities involved bridge modification, road and drainage works, noise barrier/enclosure installation, utility diversion works, promenade works and landscape works in 2020. Total 4 and 42 limit level exceedances were recorded in scheduled noise monitoring and real-time noise monitoring in the reporting period. After the investigation, 1 out of the 42 limit level exceedances were concluded as project related, others were concluded as non-project related. No action level exceedance related to noise complaint was recorded in the reporting period.

4.1.13.   The major construction activities involved bridge modification, road and drainage works, noise barrier/enclosure modification, promenade works and landscape works in 2021. No limit level exceedance and 57 limit level exceedances were recorded in scheduled noise monitoring and real-time noise monitoring in the reporting period. After the investigation, 4 out of the 57 limit level exceedances were concluded as project related, others were concluded as non-project related. No action level exceedance were confirmed from noise complaints received in the reporting period.

4.1.14.   The major construction activities involved bridge modification, road and drainage works, noise barrier/enclosure modification, promenade works and landscape works in 2022 (up to Jul 2022). No limit level exceedance and 16 limit level exceedances were recorded in scheduled noise monitoring and real-time noise monitoring in the reporting period. After the investigation, all limit level exceedances were concluded as non-project related. No action level exceedance were confirmed from noise complaints received in the reporting period.

4.1.15.   Details of graphical presentation of noise monitoring result can refer to Appendix 4.2. The complaint investigation shall refer to Appendix 6.1.

4.1.16.   Details of graphical presentation of real time noise monitoring result can referred to Appendix 4.3.

 


4.2         Air Quality Monitoring Results

Air Quality Monitoring

4.2.1       The air quality monitoring exceedances in reporting period is summarized in Table 4.2.

Table 4.2 Summary of air quality exceedances

Year

Parameter

CMA1a / CMA1b

CMA2a

CMA3a

CMA4a

CMA5a /  CMA5b

MA1e /

MA1w /

MA1b

Total

2010

24hr TSP

-

0

-

-

-

0

0

1hr TSP

-

0

-

-

-

0

0

2011

24hr TSP

0

0

0

0

0

0

0

1hr TSP

0

0

0

0

0

0

0

2012

24hr TSP

0

0

0

0

0

0

0

1hr TSP

0

0

0

0

0

0

0

2013

24hr TSP

0

0

0

0

0

0

0

1hr TSP

2AL

0

2AL

0

0

1AL / 1LL

5AL / 1LL

2014

24hr TSP

0

0

0

0

0

0

0

1hr TSP

0

0

0

0

0

0

0

2015

24hr TSP

2AL

2AL

0

1 AL

1AL / 1LL

0

6AL / 1LL

1hr TSP

1AL

2AL

0

0

2AL / 1LL

0

5AL / 1LL

2016

24hr TSP

0

0

0

0

1AL

0

1AL

1hr TSP

1AL

0

0

0

5AL

0

6AL

2017

24hr TSP

0

0

0

0

5AL

0

5AL

1hr TSP

2LL

0

0

0

4LL / 9AL

0

6LL / 9AL

2018

24hr TSP

0

0

0

0

0

0

0

1hr TSP

0

1AL

0

0

1AL

0

2AL

2019

24hr TSP

0

0

0

0

0

0

0

1hr TSP

1AL

0

1AL

1AL

0

0

3AL

2020

24hr TSP

-

0

0

-

-

0

0

1hr TSP

-

0

0

-

-

0

0

2021

24hr TSP

-

1AL

0

-

-

1AL

2AL

1hr TSP