EXECUTIVE SUMMARY

Introduction

1. This is the 54^th 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 April 2021.

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
Environmental Monitoring	Action Level	Limit Level	Action Level	Limit Level	Action Taken
Air Quality	0	0	0	0	N/A
Noise	12	2	10	0	Refer to Appendix K & O
Marine Water Quality	37	138	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. Ten (10) Action Level exceedances were recorded due to documented project-related complaints received in this reporting month. The Summary of Documented Complaints in Reporting Month is tabulated in Table III.

8. No project-related Limit Level exceedance for 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 thirty-seven (37) Action Level and one-hundred-and-thirty-eight (138) Limit Level exceedances recorded 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 3October 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 and NE/2017/07 on 14 April 2021 & NE/2015/02, NE/2017/01, NE/2017/02 and NE/2017/06 on 15 April 2021 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
April 2021	12	Noise	Details refer to App O	Draft CIRs submitted / On-going
March 2021	18*	Noise	Details refer to App O	Draft CIRs submitted / On-going
February 2021	3	Noise	Details refer to App O	Closed/ Draft CIRs submitted/ On-going
January 2021	13	Noise / Air	Details refer to App O	On-going /Closed
December 2020	13	Noise / Operating hours	Details refer to App O	Draft CIRs submitted / Closed
November 2020	14	Air / Noise	Details refer to App O	Closed
Notifications of any summons & prosecutions received	0	---	N/A	N/A

*4 new complaints in March 2021 was received by Environmental Team in April 2021

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
536	Suspected low-frequency noise nuisance at Portion IX (Apr 2021)	The complaint is considered as non-project-related as no PME was turned on during the time of complaint. Details shall be referred to CIR-N136.	NIL
537	Noise Nuisance due to Breaking Works (C3- Apr)	Breaking works was conducted during the time of complaint. No limit level for noise monitoring was triggered. The complaint is considered as project-related. Details shall be referred to CIR-N137.	NIL as breaking works ended on late-April.
538, 539, 545	Noise nuisance on holiday mornings (C2 - Mar)	No works was conducted during the time of complaint. The complaint is considered as non-project-related. Details shall be referred to CIR-N138.	NIL
546	Noise nuisance on holiday mornings (C6 - Apr)	Investigation undergoing
Lam Tin Side
534, 535, 540, 541, 542, 543, 544, 547, 548, 549	Noise nuisance during nighttime (C1 - Apr 2021)	Investigation undergoing

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 (April 2021)
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) Aministration Building, West Ventilation Building & Bridge Construction 5) Stormwater Tank Construction 6) S01_2, EHC1&4 Construction 7) CKLR Underground Utilities 8) Landscape Deck
		Main Tunnel	9) S02_2 Excavation 10) Main Tunnel Lining Works
		TKO Interchange	11) Bridge Construction 12) 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) Installation of ELS at cofferdam CH105 – CH318 7) Installation of de-watering system at CH821 – CH105 Cofferdam 8) Construction of U-trough at CH821 – CH105 9) Construction of Underpass at CH105 – CH318 10) Re-construction of watermains DN150/DN200 at Tong Yin Street 11) Structure works for underpass CH105 – CH318 12) Reinstatement of Tong Yin Street 13) Reinstatement of Chiu Shin Street 14) Water works PE315 and DN300 15) Removal of temporary cofferdam 16) Installation of socketed H-pile at CT01 CH117 – CH336 17) Construction of seawall coping 18) Road & drainage works at SR1 footpath / cycle track 19) Excavation of 3rd layer of ELS at CH105 – CH318 cofferdam 20) Construction of storm water drain system for SHH 9101 – 9103 21) Drainage works at U-trough CH318 – CH363.50 22) H-Pile Remedial Works at CH105 – CH318 Cofferdam 23) Construction of Site Hull Road adjacent to SR2 CH110 – CH170
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 Pile Cap 4) Segment Erection Works 5) Installation of Parapet Skin
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) Asphalt Paving 4) Pier, Staircase and Lift Shalt Construction 5) Road Works
NE/2017/06	Tseung Kwan O – Lam Tin Tunnel – Traffic Control and Surveillance System(TCSS) and Associated Works	1) System Integration Test 2) Installation works at Admin Building 3) Goods arrival & storage on site
NE/2017/07	Cross Bay Link, Tseung Kwan O – Main Bridge and Associated Works	1) Predrilling Work at Portion I had completed with 26 out of 35 numbers 2) Precast Shell Installation 3) 1st Stage Concrete for pile caps 4) Precast Pier Installation 5) 2nd Stage Concrete for pile caps 6) Precast Box Girder Installation 7) E&M Work and External Work at Portion V 8) Fabrication of deck segment panels steel 9) Round deck segment assembly 10) Fabrication of arch rib panels steel 11) Round arch rib segment assembly 12) Load-out and Transportation of Steel Main Bridge 13) Load-out, Transportation and Floating-in of Steel Bridge

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 (May 2021)		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, West Ventilation Building & Bridge Construction 5) Stormwater Tank Construction 6) S01_2, EHC1&4 Construction 7) CKLR Underground Utilities 8) Landscape Deck	(A) / (B) / (C) / (D) / (E) / (G)
	Main Tunnel	9) S02_2 Excavation 10) Main Tunnel Lining Works	(B)
	TKO Interchange	11) Bridge Construction 12) 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) Site formation at Road P2 CH500-CH650 and SR1 3) Road and drainage works at Road P2 CH500 – 650, slip road SR1 footpath and cycle track, slip road SR2 CH250 – CH350 4) ELS at underpass P2 CH105 – CH318 5) 4th of excavation at CH105 – CH318 cofferdam 6) Excavation/ELS at CH821 – CH105 Cofferdam 7) Installation of socketed H-pile at CT01 CH117 – CH336 8) Reinstatement of Tong Yin Street 9) Installation of de-watering system at CH821 – CH105 10) Excavation & ELS installation works at CH821 – CH105 11) Construction of U-tough at CH821 – CH105 12) Drainage works at U-trough CH318 – CH363.50 13) Pre-bore/ELS works for U-trough CH363.50 – CH411/U-trough SR2 CH110-CH170 14) Construction of profile barrier at U-trough CH318 – CH363.50 15) Construction of sloping seawall 16) Removal of temporary cofferdam 17) Construction of seawall coping 18) Drainage works at SR1 footpath / cycle truck 19) Installation of ELS at cofferdam CH105 – CH318 20) Backfilling works for reinstatement of Tong Yin Street 21) Construction of U-trough at CH821 – CH 105 Cofferdam 22) Excavation and re-compaction at S100 CH280 – S200 CH755 and S300 CH405 – CH326 23) Waterworks – DN300/PE315 24) RC Structure works for U-trough A-B 25) RC Structure works for U-trough C		(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) Construction of Pier 2) Construction of Pier Head works 3) Segment erection works 4) Construction of Bridge Decks 5) Installation of Parapet Skin		(A) / (B) / (E) / (F) / (G)
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) Asphalt Paving 4) Pier, Staircase and Lift Shalt Construction 5) Road Works		(A) / (B) / (E) / (F) / (G)
NE/2017/06 – Tseung Kwan O – Lam Tin Tunnel – Traffic Control and Surveillance System(TCSS) and Associated Works	1) System Integration Test 2) Goods arrival & storage on site 3) Installation in Admin Building 4) Installation in Tunnel Building		(E)
NE/2017/07 - Cross Bay Link, Tseung Kwan O – Main Bridge and Associated Works	1) Fabrication work for precast pier 2) Preparation for Rolling out for Precast Box Girder 3) Jointing deck segments 4) Dismantle of temporary support towers and loading out steel main bridge to barge 5) Preparation of temporary support tower 6) Fabrication of Precast Segment and Precast Shell 7) Pre-drilling 8) Bored piling		(A) / (B) / (D) / (E) / (F) / (G) / (H) / (I)

Note:

(A) Watering for dust generation from haul road, stockpiles of dusty materials, exposed site area, excavation works and rock breaking activities;

(B) Noisy construction activity such as rock-breaking activities and piling works;

(D) Wastewater and runoff discharge from site;

(E) Accumulation of silt, mud and sand along U-channels and sedimentation tanks;

(F) Set up and implementation of temporary drainage system for the surface runoff;

(G) Storage of chemicals/fuel and chemical waste/waste oil on site;

(H) Accumulation and storage of general and construction waste on site; and

(I) Marine water quality impact and indirect impact to coral communities due to marine construction for TKO-LTT reclamation

1. introduction

1.1 Cinotech Consultants Limited (Cinotech) was commissioned by Civil Engineering and Development Department (CEDD) as the Environmental Team (ET) to undertake environmental monitoring and auditing services for the Works Contracts involved in the implementation of Tseung Kwan O – Lam Tin Tunnel (TKO-LTT) project to ensure that the environmental performance of the Works Contracts comply with the requirements specified in the Environmental Permit (EP), Environmental Monitoring & Audit (EM&A) Manual, Environmental Impact Assessment (EIA) Report of the TKO-LTT project and other relevant statutory requirements. This is the 54^th Monthly EM&A report summarizing the EM&A works for the Project in April 2021.

Purpose of the Report

1.2 This is the 54^th Monthly EM&A Report which summarises the impact monitoring results and audit findings for the EM&A programme during the reporting period in April 2021.

Structure of the Report

1.3 The structure of the report is as follows:

Section 1: Introduction – purpose and structure of the report.

Section 2: Contract Information – summarises background and scope of the Contract, site description, project organization and contact details, construction programme, the construction works undertaken and the status of Environmental Permits/Licenses during the reporting month.

Section 3: Air Quality Monitoring – summarises the monitoring parameters, monitoring programmes, monitoring methodologies, monitoring frequency, monitoring locations, Action and Limit Levels, monitoring results and Event / Action Plans.

Section 4: Noise Monitoring – summarises the monitoring parameters, monitoring programmes, monitoring methodologies, monitoring frequency, monitoring locations, Action and Limit Levels, monitoring results and Event / Action Plans.

Section 5: Water Quality Monitoring – summarises the monitoring parameters, monitoring programmes, monitoring methodologies, monitoring frequency, monitoring locations, Action and Limit Levels, monitoring results and Event / Action Plans.

Section 6: Ecological Monitoring – summarises the monitoring parameters, monitoring programmes, monitoring methodologies, monitoring frequency, monitoring locations and Action and Limit Levels, monitoring results and Event / Action Plans.

Section 7: Cultural Heritage –summarises the monitoring parameters, monitoring programmes, monitoring methodologies, monitoring frequency, monitoring locations and monitoring results.

Section 8: Landscape and Visual Monitoring Requirements – summarises the requirements of landscape and visual monitoring

Section 9: Landfill Gas Monitoring – summarises the monitoring parameters, monitoring programmes, monitoring methodologies, monitoring frequency, monitoring locations, monitoring results and Limit Levels and Action Plan

Section 10: Environmental Site Inspection – summarises the audit findings of the weekly site inspections undertaken within the reporting month.

Section 11: Waste Management – summarises the waste management data in the reporting month.

Section 12: Environmental Non-conformance – summarises any monitoring exceedance, environmental complaints, environmental summons and successful prosecutions within the reporting month.

Section 13: Future Key Issues – summarises the impact forecast and monitoring schedule for the next three months.

Section 14: Conclusions and Recommendation

2. PROJECT INFORMATION

Background

2.1 In 2002, Civil Engineering and Development Department (CEDD) commissioned an integrated planning and engineering study under Agreement No. CE 87/2001 (CE) “Further Development of Tseung Kwan O – Feasibility Study” (the “TKO Study”) to formulate a comprehensive plan for further development of TKO New Town. It recommended to further develop TKO to house a total population of 450,000 besides the district’s continuous commercial and industrial developments.

2.2 At present, the Tseung Kwan O Tunnel is the main connection between Tseung Kwan O (TKO) and other areas in the territory. To cope with the anticipated transport need, the TKO Study recommended the provision of Tseung Kwan O – Lam Tin Tunnel (TKO-LTT) (hereinafter referred to as “the Project”) and Cross Bay Link (CBL) to meet the long-term traffic demand between TKO and the external areas. The site layout plan for the Project is shown in Figure 1. CBL was also entrusted with part of the marine viaducts near Tseung Kwan O Interchange since the commencement of the CBL project the December 2018.

2.3 The Environmental Impact Assessment (EIA) Report for the TKO-LTT project was approved under the Environmental Impact Assessment Ordinance (EIAO) in July 2013. The corresponding Environmental Permit (EP) was issued in August 2013 (EP no.: EP-458/2013). Variations to the EP was applied and the latest EP (EP no.: EP-458/2013/C) was issued by the Director of Environmental Protection (DEP) in January 2017.

2.4 The commencement dates of construction of this Project are:

Ÿ Contract No. NE/2015/01 and Contract No. NE/2015/02: 7 November 2016.

Ÿ Contract No. NE/2015/03: 29 May 2017.

Ÿ Contract No. NE/2017/02: 15 March 2018.

Ÿ Contract No. NE/2017/01: 23 May 2018.

Ÿ Contract No. NE/2017/06: 09 November 2018.

Ÿ Contract No. NE/2017/07: 22 February 2021

Project Organizations

2.5 Different parties with different levels of involvement in the project organization include:

· Project Proponent – Civil Engineering and Development Department (CEDD)

· The Engineer and the Engineer’s Representative (ER) – AECOM

· Environmental Team (ET) – Cinotech Consultants Limited (Cinotech)

· Independent Environmental Checker (IEC) – AnewR Consulting Limited (AnewR)

2.6 The key contacts of the Project are shown in Table 2.1.

Table 2.1 Key Project Contacts

Party	Role	Contact Person	Phone No.	Fax No.
CEDD	Project Proponent	Mr. LO Sai Pak, Sunny	2301 1384	2739 0076
AECOM	Engineer’s Representative	Mr. KY Chan	3922 9000	2759 1698
Cinotech	Environmental Team	Dr. HF Chan	2151 2088	3107 1388
Cinotech	Environmental Team	Mr. KS Lee	2151 2091	3107 1388
AnewR	Independent Environmental Checker	Mr. James Choi	2618 2836	3007 8648

Construction Activities undertaken during the Reporting Month

2.7 The major site activities undertaken in the reporting month included:

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

Contract No.	Project Title	Site Activities (April 2021)
NE/2015/01	Tseung Kwan O – Lam Tin Tunnel – Main Tunnel and Associated Works	Lam Tin Interchange	1) NE/2015/01
		Main Tunnel	2) S02_2 Excavation 3) Main Tunnel Lining Works
		TKO Interchange	4) Bridge Construction 5) 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) Installation of ELS at cofferdam CH105 – CH318 7) Installation of de-watering system at CH821 – CH105 Cofferdam 8) Construction of U-trough at CH821 – CH105