EXECUTIVE SUMMARY

Introduction

1.      This is the 26th 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 December 2018.

 

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, Tseun 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

9

13

9

1

Refer to Appendix K & O

Groundwater Quality

3

4

0

0

Refer to Appendix K

Marine Water Quality

23

170

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.      All 1-hour TSP monitoring was conducted as scheduled in the reporting month. No Action/Limit Level exceedance was recorded.

 

6.      All 24-hour TSP monitoring was conducted as scheduled in the reporting month. No Action/Limit Level exceedance was recorded.

 

Construction Noise Monitoring

 

7.      All noise monitoring was conducted as scheduled in the reporting month. Nine (9) Action Level exceedances were recorded due to the documented complaints received in this reporting month. Thirteen (13) Limit Level exceedances were recorded in the reporting month.

 

Water Quality Monitoring

 

8.      Groundwater quality monitoring was conducted as scheduled in the reporting month. Three (3) action level and Four (4) Limit Level exceedances were recorded in the reporting month.

 

9.      All marine water monitoring was conducted as scheduled in the reporting month. Twenty-three (23) Action Level and one hundred and seventy (170) Limit Level exceedance in marine water quality monitoring.

 

10.  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. The daily piezometer monitoring has resumed on 19 November 2018, as the construction activity was within 50m. No Action Level exceedance was recorded in the reporting month.

 

Ecological Monitoring

 

11.  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

 

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

 

Landscape and Visual Monitoring and Audit

 

13.  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

 

14.  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

 

15.  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/2015/03, NE/2017/01 and NE/2017/02 on 5,  12, 19, 4 and 19 December 2018 respectively. Details of the audit findings and implementation status are presented in Section 10.

 

Waste Management 

 

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

 


Key Information in the Reporting Month

 

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

 

Table II    Summary Table for Key Information in the Reporting Month

Event

Event Details

Action Taken

Status

Number

Nature

Complaint received by Project Team / Complaint referred by EPD (December 2018)

9

Noise nuisance/

Construction dust

 

Under investigation

On-going

Complaint received by Project Team / Complaint referred by EPD (November 2018)

12

Noise nuisance/

Construction dust

 

Details refer to App O

On-going

Complaint received by Project Team / Complaint referred by EPD (October 2018)

13

Noise nuisance

Details refer to App O

Closed

Notifications of any summons & prosecutions received

0

---

N/A

N/A

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

18.  Summary of key construction work in the reporting month is tabulated in Table III.

 

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

Contract No.

Project Title

Site Activities (December 2018)

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 3, Area 4 and Area 5

Main Tunnel

3)    Main tunnel Excavation

TKO Interchange

4)    Haul Road Construction, Site Formation and Slope Works

5)    Steel Platform for Bridge Construction

6)    Cavern Excavation

NE/2015/02

Tseung Kwan O – Lam Tin Tunnel – Road P2 and Associated Works

1)      Backfilling works

2)      Construction of U-trough structure

3)      Pre-bore and sheetpile works for 2100 pipe at Portion IV and Portion VII

4)      Pre-bore works for decked U-trough

5)      Sheet pile works for decked U-trough

6)      Drainage works at U-trough CH411-CH500

7)      ELS works and construction of P2A RW

8)      ELS works for 2100 pipe

9)      Construction of desilting opening near retaining wall at P2A Bay 8 at Portion VIII

10)  Installation of 2100 storm water pipe at Portion IV / VII

11)  King post and de-watering system for proposed U-trough CH318.00 – CH363.50 at Portion V/VI

12)  Construction of permanent fence at Ocean Shores

13)  CCTV works at covered channel at Portion IV

14)  Fabrication of ELS members for proposed ELS system at CH318.00 – CH363.50

15)  Removal of damage temporary steel cofferdam

16)  Surcharging at surcharge Area 1a

17)  Reclamation works at Portion IX

18)  Reinstatement of existing seawall at Portion VII

19)  Pre-drilling at P2 CH283 – CH305

NE/2015/03

Tseung Kwan O – Lam Tin Tunnel – Northern Footbridge

1)      Construction of Main deck

2)      Erection of scaffolding for Staircase 1

3)      Installation of Lift Car

4)      Plate Load Test for the temporary filled area

NE/2017/01

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

1)      Repairing Works for Temporary Working Platform

2)      Pre-drilling

3)      Bored piling

4)      Dismantling Works for Temporary Working Platform

5)      Construction of Temporary Working Platform

 

NE/2017/02

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

1)      Trial pit

2)      Underground utilities detection

3)      Temporary traffic arrangement setup

4)      Piling Works

5)      Construction of Temporary carriageway

6)      Pre-bored Socket H-Pile

7)      Modification of traffic island

8)      Predrilling

9)      Construction of Temporary cycle track

10)  Construction of drainage and watermain

Future Key Issues

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

 

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

Contract No. and Project Title

Site Activities (January 2019)

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 3, Area 4 & Area 5

(A) / (B) / (C) / (D) / (E)  (G)

Main Tunnel

3)    Main Tunnel Excavation

4)    Main Tunnel Lining Works

(B)

TKO Interchange

5)    Haul Road Construction and Site Formation & Slope Works

6)    Cavern Excavation

7)    Steel Platform for Bridge Construction

 

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

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

1)      Backfilling works

2)      Construction of U-trough structure

3)      Pre-bore and sheetpile works for 2100 pipe at Portion IV and Portion VII

4)      Pre-bore works for decked U-trough

5)      Sheet pile works for decked U-trough

6)      Drainage works at U-trough CH411-CH500

7)      ELS works and construction of P2A RW

8)      ELS works for 2100 pipe

9)      Construction of desilting opening near retaining wall at P2A Bay 8 at Portion VIII

10)  Installation of 2100 storm water pipe at Portion IV / VII

11)  King post and de-watering system for proposed U-trough CH318.00 – CH363.50 at Portion V/VI

12)  Construction of permanent fence at Ocean Shores

13)  CCTV works at covered channel at Portion IV

14)  Fabrication of ELS members for proposed ELS system at CH318.00 – CH363.50

15)  Removal of damage temporary steel cofferdam

16)  Surcharging at surcharge Area 1a

17)  Reclamation works at Portion IX

18)  Reinstatement of existing seawall at Portion VII

19)  Pre-drilling at P2 CH283 – CH305

 

 

 

 

 

 

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

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

1)      Construction of Main deck

2)      Remove steel mould & scaffolding of bridge deck

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

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

1)      Dismantling Works for Temporary Working Platform

2)      Pre-drilling

3)      Bored piling

4)      Construction of Temporary Working Platform

5)      Installation of Precast Pile Cap Shell

Construction of Pile Cap Shell

(A) / (B) / (E) / (F) / (G)

NE/2017/02 –Tseung Kwan O - Lam Tin Tunnel - Road P2/D4 and Associated Works

1)      Trial pit

2)      Underground utilities detection

3)      Temporary traffic arrangement setup

4)      Piling Works

5)      Construction of Temporary carriageway

6)      Pre-bored Socket H-Pile

7)      Modification of traffic island

8)      Predrilling

9)      Construction of Temporary cycle track

10)  Construction of drainage and watermain

(A) / (B) / (E) / (F) / (G)

 

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;

(C)      Runoff from exposed slope or site area;

(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.