TABLE OF CONTENTS

 

EXECUTIVE SUMMARY.. 1

Introduction. 1

Environmental Monitoring Works. 1

Key Information in the Reporting Month. 4

Key Construction Work in the reporting month & the next reporting month. 4

Future Key Issues. 7

1. introduction.. 9

Purpose of the Report 9

Structure of the Report 9

2. PROJECT INFORMATION.. 11

Background. 11

Project Organizations. 11

Construction Activities undertaken during the Reporting Month. 12

Status of Environmental Licences, Notification and Permits. 13

Summary of EM&A Requirements. 14

3. AIR QUALITY.. 17

Monitoring Requirements. 17

Monitoring Locations. 17

Monitoring Equipment 17

Monitoring Parameters and Frequency. 18

Monitoring Methodology. 18

Results and Observations. 21

4. NOISE.. 22

Monitoring Requirements. 22

Monitoring Locations. 22

Monitoring Equipment 22

Monitoring Methodology and QA/QC Procedure. 23

Results and Observations. 24

5. WATER QUALITY.. 27

Monitoring Requirements. 27

Monitoring Locations. 28

Monitoring Equipment 28

Monitoring Parameters and Frequency. 30

Monitoring Methodology. 31

Laboratory Analytical Methods. 31

QA/QC Requirements. 32

Decontamination Procedures. 32

Sampling Management and Supervision. 32

Results and Observations. 32

6. ECOLOGY.. 36

Post-Translocation Coral Monitoring. 36


 

7. cultural heritage.. 37

Monitoring Requirement 37

Monitoring Locations. 37

Monitoring Equipment 37

Monitoring Methodology. 38

Alert, Alarm and Action Levels. 38

Results. 38

Mitigation Measures for Cultural Heritage. 38

8. LANDSCAPE AND VISUAL IMPACT REQUIREMENTS. 39

9. LANDFILL GAS MONITORING.. 40

Monitoring Requirement 40

Monitoring Parameters and Frequency. 40

Monitoring Locations. 40

Monitoring Equipment 40

Results and Observations. 41

10. ENVIRONMENTAL AUDIT.. 42

Site Audits. 42

Implementation Status of Environmental Mitigation Measures. 42

11. WASTE MANAGEMENT.. 43

12. ENVIRONMENTAL NON-CONFORMANCE.. 44

Summary of Exceedances. 44

Summary of Environmental Non-Compliance. 44

Summary of Environmental Complaint 44

Summary of Environmental Summon and Successful Prosecution. 44

13. FUTURE KEY ISSUES. 45

Key Issues for the Coming Month. 46

14. CONCLUSIONS AND RECOMMENDATIONS. 48

Conclusions. 48

Recommendations. 49

 


lIST OF TABLES

 

Table I Non-compliance (exceedance) Recorded for the Project in the Reporting Month

Table II Key Information in the Reporting Month

Table III Summary Table for Complaint Details in the Reporting Month

Table IV Summary Table for Key Construction Work in the Reporting Month

Table V Summary Table for Site Activities in the next Reporting Period

Table 2.1 Key Project Contacts

Table 2.2 Summary Table for Major Site Activities in the Reporting Month

Table 2.3 Construction Programme Showing the Inter-Relationship with Environmental Protection/Mitigation Measures

Table 2.4 Summary of the Status of Environmental Licences, Notification and Permits

Table 3.1 Locations for Air Quality Monitoring

Table 3.2 Air Quality Monitoring Equipment

Table 3.3 Impact Dust Monitoring Parameters, Frequency and Duration

Table 3.4 Major Dust Source during Air Quality Monitoring

Table 4.1 Noise Monitoring Stations

Table 4.2 Noise Monitoring Equipment

Table 4.3 Noise Monitoring Parameters, Frequency and Duration

Table 4.4 Major Noise Source during Noise Monitoring

Table 4.5 Baseline Noise Level and Noise Limit Level for Monitoring Stations

Table 4.6 Baseline Noise Level and Noise Limit Level for Monitoring Stations (Evening-time & Daytime (Holiday))

Table 4.7 Baseline Noise Level and Noise Limit Level for Monitoring Stations (Night-time)

Table 5.1 Not Used

Table 5.2 Marine Water Quality Monitoring Stations

Table 5.3 Water Quality Monitoring Equipment

Table 5.4 Water Quality Monitoring Parameters and Frequency

Table 5.5 Methods for Laboratory Analysis for Water Samples

Table 5.6 Not Used

Table 7.1 Cultural Heritage Monitoring Equipment

Table 7.2 AAA Levels for Monitoring for Cultural Heritage

Table 9.1 Landfill Gas Monitoring Equipment

Table 13.1 Summary Table for Site Activities in the next Reporting Period

 


lIST OF FIGUREs

 

Figure 1 Site Layout Plan

Figure 1a Site Portions under Works Contract No. NE/2015/01 (Lam Tin Side)

Figure 1b Site Portions under Works Contract No. NE/2015/01 (Tseung Kwan O Side)

Figure 1c Site Portions under Works Contract No. NE/2015/02

Figure 1d Site Portions under Works Contract No. NE/2015/03

Figure 1e Site Portions under Works Contract No. NE/2017/01

Figure 1f Site Portions under Works Contract No. NE/2017/01

Figure 1g Site Portions under Works Contract No. NE/2017/02

Figure 1h Site Portions under Works Contract No. NE/2017/02

Figure 2 Locations of Air Quality Monitoring Stations

Figure 3 Locations of Construction Noise Monitoring Stations

Figure 4 Not Used

Figure 5 Locations of Marine Water Quality Monitoring Stations

Figure 6 Locations of Landfill Gas Monitoring

Figure 7 Location of Post-translocation Coral Monitoring

Figure 8 Location of Monitoring for Cultural Heritage

Figure 9 Not Used

 

 

 

lIST OF APPENDIces

 

Appendix A        Action and Limit Levels

Appendix B        Copies of Calibration Certificates

Appendix C        Weather Information

Appendix D        Environmental Monitoring Schedules

Appendix E         1-hour TSP Monitoring Results and Graphical Presentations

Appendix F         24-hour TSP Monitoring Results and Graphical Presentations

Appendix G        Noise Monitoring Results and Graphical Presentations

Appendix H       Not Used

Appendix I          Marine Water Quality Monitoring Results and Graphical Presentations

Appendix J           Not Used

Appendix K        Summary of Exceedance

Appendix L         Site Audit Summary

Appendix M       Event and Action Plans

Appendix N       Implementation Schedule And Recommended Mitigation Measures

Appendix O       Summaries of Environmental Complaint, Warning, Summon and Notification of Successful Prosecution

Appendix P         Waste Generation in the Reporting Month

Appendix Q       Tentative Construction Programme

Appendix R        Record of Landfill Gas Monitoring by Contractor

Appendix S         Not Used

Appendix T         Cultural Heritage Monitoring Results

Appendix U       Not Used

Appendix V       Surface Runoff Management Plan

 

 


EXECUTIVE SUMMARY

Introduction

1.      This is the 47th Environmental Monitoring and Audit (EM&A) Report prepared by Cinotech Consultants Limited for the Agreement No. CE 59/2015 (EP) Environmental Team for Tseung Kwan O Lam Tin Tunnel Design and Construction (hereinafter called the Project). This report documents the findings of EM&A Works conducted in September 2020.

 

2.      During the reporting month, the following works contracts were undertaken:

     Contract No. NE/2015/01 Tseung Kwan O Lam Tin Tunnel Main Tunnel and Associated Works;

     Contract No. NE/2015/02 Tseung Kwan O Lam Tin Tunnel Road P2 and Associated Works;

  Contract No. NE/2015/03 Tseung Kwan O Lam Tin Tunnel Northern Footbridge;

  Contract No. NE/2017/01 Tseung Kwan O Lam Tin Tunnel Tseung Kwan O Interchange and Associated Works

  Contract No. NE/2017/02 Tseung Kwan O Lam Tin Tunnel Road P2/D4 and Associated Works.

  Contract No. NE/2017/06 Tseung Kwan O Lam Tin Tunnel Traffic Control and Surveillance System(TCSS) and Associated Works

  Contract No. NE/2017/07 Cross Bay Link, Tseung Kwan O Main Bridge and Associated Works.

Environmental Monitoring Works

3.      Environmental monitoring for the Project was performed in accordance with the EM&A Manual and the monitoring results were checked and reviewed. Site Inspections/Audits were conducted once per week. The implementation of the environmental mitigation measures, Event Action Plans and environmental complaint handling procedures were also checked.

 

4.      Summary of the non-compliance (exceedance) in the reporting month for the Project is tabulated in Table I.

 


 

Table I Non-compliance (exceedance) Record for the Project in the Reporting Month

Environmental Monitoring

No. of Non-compliance (Exceedance)

No. of Non-compliance (Exceedance)

due to Construction Activities of this Project

Action Taken

Action Level

Limit Level

Action Level

Limit Level

Air Quality

0

0

0

0

N/A

Noise

8

0

6

0

Refer to Appendix K & O

Marine Water Quality

43

137

0

0

Refer to Appendix K

Groundwater Level Monitoring (Piezometer Monitoring)

0

N/A1

0

N/A1

N/A

Ecological

N/A

N/A

N/A

N/A

N/A

Cultural Heritage

0

0

0

0

N/A

Landfill Gas

0

0

0

0

N/A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note:(1) No Limit Level for Groundwater Level Monitoring (Piezometer Monitoring).

 

Air Quality Monitoring

 

5.      No Action/Limit Level exceedance for 1-hour TSP monitoring was recorded.

 

6.      No Action/Limit Level exceedance for 24-hour TSP monitoring was recorded.

 

Construction Noise Monitoring

 

7.      Six (6) Action Level exceedances were recorded due to the documented complaints received in this reporting month. The Summary of Documented Complaints in Reporting Month is tabulated in Table III.

 

8.      No Limit Level exceedance for day time and no limit level exceedance for night time construction noise monitoring were recorded in the reporting month.

 

Water Quality Monitoring

 

9.      Groundwater quality monitoring had been suspended since October 2019 upon the agreement by EPD. Further details should be founded at Section 5.1.

 

10.  All marine water quality monitoring was conducted as scheduled in the reporting month. There were forty-three (43) Action Level and one hundred and thirty-seven (137) Limit Level exceedances in Monitoring Stations (M) during marine water quality monitoring. During this reporting month, no sand plume was observed during the water quality monitoring and site audits, therefore there is no direct evidence that the recent exceedances were due to the construction works of the Project. Details of this investigation are presented in Section 5. Daily silt curtain inspection and weekly diving inspection have been carried out by contractor, the record, as reviewed by the site auditors, indicated that silt curtains were found in good conditions.

 

11.  Construction phase daily piezometer monitoring by the Contractor commenced in June 2018. It has switched to monthly basis since 3 October 2018 as the construction activity was 120m away from the piezometer gate. No monitoring was conducted in the reporting month.

 

Ecological Monitoring

 

12.  Post-translation coral monitoring survey shall be conducted once every 3 months for a period of 12 months after completion of coral translocation. The post-translocation coral monitoring surveys were completed in November 2017.

 

Monitoring on Cultural Heritage

 

13.  Monitoring of impacts on Cultural Heritage at Cha Kwo Ling Tin Hau Temple commenced in May 2017. No Alert, Alarm and Action (AAA) Level exceedance was recorded in the reporting month.

 

Landscape and Visual Monitoring and Audit

 

14.  The implementation of landscape and visual mitigation measures was checked during the environmental site inspections. Recommended follow-up actions have been discharged by the Contractor. Details of the audit findings and implementation status are presented in Section 10.

 

Landfill Gas Monitoring

 

15.  Monitoring of landfill gases commenced in December 2016 and were carried out by the Contractor at excavation location, Portion III. No Limit Level exceedance was recorded.

 

Environmental Site Inspection

 

16.  Joint weekly site inspections were conducted by representatives of the Contractor, Engineer and Environmental Team. The representative of the IEC joined the site inspection for NE/2015/01, NE/2015/02, NE/2017/01 and NE/2017/02 on 30, 17, 17 and 17 September 2020 respectively. Details of the audit findings and implementation status are presented in Section 10.

 

Waste Management

 

17.  Wastes generated from this Project include inert construction and demolition (C&D) materials, non-inert C&D materials and marine sediment. Details of waste management data is presented in Section 11 and Appendix P.


 

Key Information in the Reporting Month

 

18.  Summary of key information in the reporting month is tabulated in Table II

Table II Key Information in the Reporting Month

Monthly Complaints

Event Details

Action Taken

Status

Number

Nature

September 2020

9

Noise / Operation hours / Water

Details refer to App O

Draft CIRs submitted/ On-going

August 2020

6

Noise / Operation hours / Water

Details refer to App O

Draft CIRs submitted/ On-going

July 2020

5

Air / Noise

Details refer to App O

Draft CIRs submitted

June 2020

52

Air / Noise / Water/ Odour

Details refer to App O

Draft CIRs submitted

May 2020

52

Air / Noise

Details refer to App O

Draft CIRs submitted/ Closed

April 2020

41

Air / Noise / Light / Odour

Details refer to App O

Draft CIRs submitted/ Closed

March 2020

11

Noise / Odour / Water

Details refer to App O

Closed

Notifications of any summons & prosecutions received

0

---

N/A

N/A

1. One of the complaint in April 2020 was missed out and discovered at mid-May 2020.

2. One complaint was moved from June 2020 to May 2020 after investigation.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

19.  Summary of complaints received in the reporting month is tabulated in Table III.

 

Table III Summary of Complaints Details in Reporting Month

Complaint No.

Complaint

Investigation Findings

Follow-up Action / Mitigation Measure

Tseung Kwan O Side

459, 467

Noise Nuisance throughout Sep Oct 2020

The complainant had repeatedly complaint about the continuous noise nuisace from September to October 2020. The CIR will be prepared in one-go.

Meanwhile, no action level of construction noise was recorded during noise monitoring; no non-compliance was identified during site inspection.

461

Squeaky noise at morning

The squeaky noise believed was coming from operating barges at C6. Details shall be referred to CIR-N115

No additional noise mitigation required as the Contractor follows the approved CNMP.

462

Suspected muddy water discharge

The muddy water was coming from DSD desilting compound. Details shall be referred to CIR-W16

N/A

463

Percussive noise nuisance at early morning

Investigation undergoing

464

Continuous Noise Nuisance over Aug 2020

The investigation shows no non-compliance and action level for noise is triggered. The details shall be referred to CIR-N113

N/A

465, 466

Noise nuisance on Sunday

Investigation result shows none of the contract under TKOLTT conducted works on Sunday. The details shall be referred to CIR-O5

N/A

Lam Tin Side

460

Noise nuisance near East Habour Cross Tunnel

Investigation showed the nuisance was generated by breaking works. The details shall be referred to CIR-N112

The contractor had promised to complete the semi-enclosure by October 2020.

Key Construction Work in the reporting month & the next reporting month

20.  Summary of key construction work in the reporting month is tabulated in Table IV.

 

Table IV Summary Table for Key Construction Work in the Reporting Month

Contract No.

Project Title

Site Activities (September 2020)

NE/2015/01

Tseung Kwan O Lam Tin Tunnel Main Tunnel and Associated Works

Lam Tin Interchange

1)     EHC2 U-Trough

2)     Site Formation Area 1G1, Area 1G2, Area 2 & Area 5

3)     Site Formation Slope stabilization & Retaining Wall

4)     Administration Building & Bridge Construction

5)     Stormwater Tank Construction

6)     S01_2, EHC1&4 Construction

7)     CKLR Underground Utilities

Main Tunnel

8)     S02_2 Excavation

9)     Main Tunnel Lining Works

TKO Interchange

10)  Bridge Construction

11)   East Ventilation Building

NE/2015/02

Tseung Kwan O Lam Tin Tunnel Road P2 and Associated Works

1)       Site formation works, road and drainage for Road P2 CH500-CH650 and SR1

2)       Sloping seawall construction

3)       Excavation at CH821 CH105 Cofferdam

4)       Excavation at CH105 CH318 Cofferdam

5)       Installation of ELS at CH105 CH821 Cofferdam

6)       Construction of U-trough at CH821 CH105

7)       Installation of dewatering system at CH821 CH105 Cofferdam

8)       Re-construction of watermains DN150/DN200 at Tong Yin Street

9)       Structure works for underpass CH105 CH318

10)   Reinstatement of Tong Yin Street

11)   Reinstatement of Chiu Shin Street

12)   Water works PR315 and DN300

13)   Removal of temporary cofferdam

14)   Installation of socketed H-pile at CT01 CH117 CH336

15)   Construction of abutment

16)   Road & drainage works at SR1 footpath / cycle truck

17)   Installation of ELS at cofferdam CH105 CH318

18)   Excavation of 3rd layer of ELS at CH105 CH318 cofferdam

19)   Backfilling works for reinstatement of Tong Yin Street

20)   Construction of storm water drain system for SHH 9101 9103

21)   Drainage works at U-trough CH318 CH363.50

NE/2015/03

Tseung Kwan O Lam Tin Tunnel Northern Footbridge

The construction works under the contract had been completed in December 2019. The EM&A works were terminated in late April 2020.

NE/2017/01

Tseung Kwan O Lam Tin Tunnel Tseung Kwan O Interchange and Associated Works

1)       Construction of Pier

2)       Construction of Pier Head Works

3)       Construction of Pier Head

4)       Bored Piling Works

5)       Segment Erection Works

6)       Installation of Precast Pile Cap Shell

NE/2017/02

Tseung Kwan O Lam Tin Tunnel Road P2/D4 and Associated Works

1)       Inspection pit excavation and utility diversion works

2)       Construction of drainage and watermain

3)       Pile cap

4)       Asphalt Paving

5)       Pier, Staircase and Lift Shalt Construction

6)       Road Works

7)       Pre-bored Socket-H Pile

NE/2017/06

Tseung Kwan O Lam Tin Tunnel Traffic Control and Surveillance System(TCSS) and Associated Works

1)       Site clearance

2)       Site Office set-up

3)       Project signboard set up

 


 

Future Key Issues

21.  The future key environmental issues in the coming month include:

 

Table V Summary Table for Site Activities in the next Reporting Period

Contract No. and Project Title

Site Activities (October 2020)

Key Environmental Issues *

NE/2015/01 - Tseung Kwan O Lam Tin Tunnel Main Tunnel and Associated Works

Lam Tin Interchange

1)    EHC2 U-Trough

2)    Site Formation Area 1G1, Area 1G2, Area 2 & Area 5

3)    Site Formation Slope stabilization & Retaining Wall

4)    Administration Building & Bridge Construction

5)    Stormwater Tank Construction

6)    S01_2, EHC1&4 Construction

7)    CKLR Underground Utilities

(A) / (B) / (C) / (D) / (E) / (G)

Main Tunnel

8)    S02_2 Excavation

9)    Main Tunnel Lining Works

(B)

TKO Interchange

10) Bridge Construction

11) East Ventilation Building

(A) / (C) / (D) / (E) / (F) / (I)

NE/2015/02 - Tseung Kwan O Lam Tin Tunnel Road P2 and Associated Works

1)                   Construction of pillar box and ducting system at Portion IV adjacent to Ocean Shores EVA

2)                  Construction of utility trough and road barriers at road P2 CH411 500 and SR2 CH110 CH170 (land section)

3)                  Site formation at Road P2 CH500-CH650 and SR1

4)                  Road and drainage works at Road P2 CH500 650, slip road SR1 footpath and cycle track, slip road SR2 CH250 CH350

5)                  R.C. structure works for U-trough CH318-CH363

6)                  ELS at underpass P2 CH105 CH318

7)                  Modification of dewatering system (P2 CH105 CH318)

8)                  4th of excavation at CH105 CH318 cofferdam

9)                  Installation of de-watering system at S200 CH821 CH105

10)              Excavation/ELS at CH821 CH105 Cofferdam

11)              Installation of socketed H-pile at CT01 CH117 CH336

12)              Re-construction of Tong Yin Street

13)              Installation of de-watering system at CH821 CH105

14)              Excavation & ELS installation works at CH821 CH105

15)              Construction of U-tough at CH821 CH105

16)              Drainage works at U-trough CH318 CH363.50

17)              Pre-bore/ELS works for U-trough CH363.50 CH411

18)              Construction of profile barrier at U-trough CH318 CH363.50

19)              Construction of sloping seawall

20)              Removal of temporary cofferdam

21)              Construction of seawall coping

22)              Drainage works at SR1 footpath / cycle truck

23)              Installation of ELS at cofferdam CH105 CH318

24)              Backfilling works for reinstatement of Tong Yin Street

25)              Construction of U-trough at CH821 CH 105 Cofferdam

26)              Excavation and re-compaction at S100 CH280 S200 CH755 and S300 CH405 CH326

27)              Construction of U-tough A

 

(A) / (B) / (C) / (D) / (E) / (G) / (I)

NE/2015/03 - Tseung Kwan O Lam Tin Tunnel Northern Footbridge

 

The construction works under the contract had been completed in December 2019. Materials are being removed from works area.

N/A

NE/2017/01 Tseung Kwan O Interchange and Associated Works

1)       Dismantling of Temporary Working Platforms

2)       Bored Piling Works

3)       Installation of Precast Pile Cap Shell

4)       Construction of Pile Cap