Job No.: TCS00975/18

 

 

 

 

 

 

 

 

 

CEDD Contract Agreement No. EDO/04/2018 -

Environmental Team for Cross Bay Link, Tseung Kwan O

 

 

 

 

 

 

 

 

 

Quarterly Environmental Monitoring and Audit (EM&A) Summary Report

(March to May 2022)

 

 

 

 

 

 

 

 

Prepared For

 

 

 

 

Civil Engineering and Development Department (CEDD)

 

 

 

 

 

 

 

 

 

 

 

Date

Reference No.

Prepared By

Certified By

1 August 2022

TCS00975/18/600/R0638v2

My signature

Martin Li

(Environmental Consultant)

Tam Tak Wing

(Environmental Team Leader)

 

Version

Date

Remarks

1

15 July 2022

First Submission

2

1 August 2022

Amended As Per IEC’s comment on 1 August 2022

 

 

 

 

 

 

 

 

 


 

 

 

 

 

executive summary

ES01            Civil Engineering and Development Department (hereafter referred as “CEDD”) is the Project Proponent and the Permit Holder of the Project Cross Bay Link, Tseung Kwan O (hereinafter referred as “the Project”) which is a Designated Project to be implemented under Environmental Permit number EP-459/2013 (hereinafter referred as “the EP-459/2013” or “the EP”).

 

ES02            AUES was awarded the CEDD Contract Agreement No. EDO/04/2018 - Environmental Team for Cross Bay Link, Tseung Kwan O (hereinafter called “the Service Contract”). The Services under the Service Contract is to provide environmental monitoring and audit (EM&A) services for the Works Contracts pursuant to the requirement of Environmental Team (ET) under the Approved EM&A Manual to ensure that the environmental performance of the Works Contracts comply with the requirement specified in the EM&A Manual and EIA Report of Agreement No. CE 43/2008 (HY) Cross Bay Link, Tseung Kwan O - Investigation and other relevant statutory requirements.

 

ES03            This is the 14th Quarterly EM&A report presenting the monitoring results and inspection findings for the reporting period from 1 March 2022 to 31 May 2022 (hereinafter ‘the Reporting Period’).

 

Environmental Monitoring and Audit Activities

ES04            Environmental monitoring activities under the EM&A program in this Reporting Period are summarized in the following table.

Table ES-4    Summary Environmental Monitoring Activities Undertaken in the Reporting Period

Issues

Environmental Monitoring Parameters / Inspection

Sessions

Air Quality

1-Hour TSP

102

24-Hr TSP

34

Construction Noise

Leq (30min) Daytime

42

Leq (5min) Evening(Note 1)

0

Leq (5min) Night(Note 1)

0

Water Quality

Marine Water Sampling(Note 2) (Note 3)

0

Inspection / Audit

Contract 1

ET Regular Environmental Site Inspection

13

Joint site audit with Project Consultant and IEC

3

Contract 2

ET Regular Environmental Site Inspection

13

Joint site audit with Project Consultant and IEC

3

Note 1     Total sessions are counted by every 3 consecutive Leq5min

Note 2     Total sessions are counted by monitoring days

Note 3    Since the marine construction works that requires marine water quality monitoring as stated in the EM&A Manual were completed, the impact water quality monitoring was ceased with effect from 1 May 2020.

 

Breach of Action and Limit (A/L) Levels

ES05            No air quality monitoring exceedance was recorded in this Reporting Period. For construction noise monitoring, two noise complaints were recorded in this Reporting Period.  The statistics of environmental exceedance and investigation of exceedance are summarized in the following table.

 

Table ES-5    Summary Environmental Monitoring Parameter Exceedance in the Reporting Period

Environmental Issues

Monitoring Parameters

Action Level

Limit Level

Event & Action

Investigation Results

Corrective Actions

Air Quality

1-Hour TSP

0

0

--

--

24-Hr TSP

0

0

--

--

Construction Noise

Leq30min Daytime

2

0

Not Project Related

--

Leq5min Evening

0

0

--

--

Leq5min Night

0

0

--

--

Water Quality (Marine Water)

DO

0

0

--

--

Turbidity

0

0

--

--

SS

0

0

--

--

 

Environmental Complaint

ES06            Three (3) environmental complaints were recorded in this Reporting Period for the Project.  The statistics of environmental complaint are summarized in the following table.

Table ES-6    Summary Environmental Complaint Records in the Reporting Period

Reporting Period

Contract

Environmental Complaint Statistics

Related with the Works Contract(s)

Frequency

Cumulative

Complaint Nature

1 March 2022 – 31 May 2022

1

2

27

Noise

Not related

2

1

17

Water

Not Project Related

 

Notification of Summons and Successful Prosecutions

ES07            No environmental summons or prosecutions was received in this Reporting Period for the Project.  The statistics of environmental summons or prosecutions are summarized in the following tables.

Table ES-7    Summary Environmental Summons Records in the Reporting Period

Reporting Period

Contract

Environmental Summons Statistics

Related with the Works Contract(s)

Frequency

Cumulative

Complaint Nature

1 March 2022 – 31 May 2022

1

0

0

NA

NA

2

0

0

NA

NA

Table ES-8    Summary Environmental Prosecutions Records in the Reporting Period

Reporting Period

Contract

Environmental Prosecution Statistics

Related with the Works Contract(s)

Frequency

Cumulative

Complaint Nature

1 March 2022 – 31 May 2022

1

0

0

NA

NA

2

0

0

NA

NA

Site Inspection by External Parties

ES08            No site inspection was undertaken by EPD and AFCD within the Reporting Period.


 

 

Table of Contents

1.    Introduction   5

1.1            Project Background   5

1.2            Report Structure  5

2.    Project Organization and Construction progress and Submission   6

2.1            Project Organization   6

2.2            Construction Progress  6

2.3            Summary of Environmental Submissions  6

3.    Summary of Environmental Monitoring Programmes and Requirements  7

3.1            General  7

3.2            Monitoring Parameters  7

3.3            Monitoring Locations  7

3.4            Monitoring Frequency and Period   8

3.5            Determination of Action/Limit (A/L) Levels  9

4.    Impact Monitoring Result   11

4.1            Results of Air Quality Monitoring in the Reporting Month   11

4.2            Results of Construction Noise Monitoring   11

4.3            Results of Water quality Monitoring   31

5.    Waste Management   13

5.1            General Waste Management  13

5.2            Records of Waste Quantities  13

6.    Site Inspection   14

6.1            Requirements  14

6.2            Findings / Deficiencies During the Reporting Month   14

7.    Landfill Gas Monitoring   15

7.1            General Requirement  15

7.2            Limit Levels and Event and Action Plan   15

7.3            Landfill Gas Monitoring   15

8.    Environmental Complaint and Non-Compliance   17

8.1            Environmental Complaint, Summons and Prosecution   17

9.    Implementation Status of Mitigation Measures  18

9.1            General Requirements  18

10.  Conclusions and Recommendations  19

10.1          Conclusions  19

10.2          Recommendations  19

 

 

 

 


List of TABLES

Table 3-1        Summary of EM&A Requirements

Table 3-2        Designated Air Quality Monitoring Location recommended in EM&A Manual

Table 3-3        Designated Construction Noise Monitoring Location recommended in EM&A Manual

Table 3-4        Designated and Interim alternative location for air quality and noise monitoring in the Reporting Period

Table 3-5        Location of Water Quality Monitoring Station

Table 3-6        Action and Limit Levels for Air Quality

Table 3-7        Action and Limit Levels for Construction Noise

Table 3-8        Action and Limit Levels for Water Quality

Table 4-1        Summary of Air Quality Impact Monitoring results

Table 4-2        Summary of Daytime Construction Noise Impact Monitoring results

Table 5-1        Summary of Quantities of Inert C&D Materials

Table 5-2        Summary of Quantities of C&D Wastes

Table 6-1        Summary of Site Observations of Contract 1

Table 6-2        Summary of Site Observations of Contract 2

Table 7-1        Actions in the Event of Landfill Gas Being Detected in Excavations

Table 8-1        Statistical Summary of Environmental Complaints

Table 8-2        Statistical Summary of Environmental Summons

Table 8-3        Statistical Summary of Environmental Prosecution

Table 9-1        Environmental Mitigation Measures in the Reporting Period

 

List of Appendices

Appendix A    Project Layout Plan

Appendix B    Project Organization Chart & Contact Details of Key Personnel

Appendix C    3-Month Rolling Construction Program

Appendix D    Monitoring Location (Air Quality, Noise and Water Quality)

Appendix E    Graphical plots of Monitoring Results

Appendix F    Meteorological Information

Appendix G    Waste Flow Table

Appendix H    Complaint Summary

Appendix I     Implementation Schedule for Environmental Mitigation Measures (ISEMM)

 

 

 

1.                       Introduction

1.1                   Project Background

1.1.1             Civil Engineering and Development Department (hereafter referred as “CEDD”) is the Project Proponent and the Permit Holder of the Project Cross Bay Link, Tseung Kwan O (hereinafter referred as “the Project”) which is a Designated Project to be implemented under Environmental Permit number EP-459/2013 (hereinafter referred as “the EP-459/2013” or “the EP”).

 

1.1.2             AUES was awarded the CEDD Contract Agreement No. EDO/04/2018 - Environmental Team for Cross Bay Link, Tseung Kwan O (hereinafter called “the Service Contract”). The Services under the Service Contract is to provide environmental monitoring and audit (EM&A) services for the Works Contracts pursuant to the requirement of Environmental Team (ET) under the Approved EM&A Manual to ensure that the environmental performance of the Works Contracts comply with the requirement specified in the EM&A Manual and EIA Report of Agreement No. CE 43/2008 (HY) Cross Bay Link, Tseung Kwan O - Investigation and other relevant statutory requirements.

 

1.1.3             As part of the EM&A programme, baseline monitoring shall be undertaken before the Project construction work commencement to determine the ambient environmental condition. The baseline air quality, background noise and water quality monitoring has been carried out between 21st September 2018 and 13th November 2018 at the designated and interim locations.  The baseline monitoring report under the EP-459/2013 has been compiled by the ET and verified by Independent Environmental Checker (hereinafter the “IEC’) prior submitted to EPD on 19th November 2018 for endorsement.

 

1.1.4             This is the 14th Quarterly EM&A report presenting the monitoring results and inspection findings for the reporting period from 1 March 2022 to 31 May 2022 (hereinafter ‘the Reporting Period’).

 

1.2                   Report Structure

1.2.1             The Environmental Monitoring and Audit (EM&A) Monthly Report is structured into the following sections:-

Section 1

Introduction

Section 2

Project Organization and Construction Progress

Section 3

Summary of Impact Monitoring Requirements

Section 4

Impact Monitoring Results

Section 5

Waste Management

Section 6

Site Inspections

Section 7

Landfill Gas Monitoring

Section 8

Environmental Complaints and Non-Compliance

Section 9

Implementation Status of Mitigation Measures

Section 10

Conclusions and Recommendations

 


2.                       Project Organization and Construction progress and Submission

2.1                   Project Organization

2.1.1             The project organization is shown in Appendix B.  The responsibilities of respective parties can be referred to Monthly Report.

 

2.2                   Construction Progress

2.2.1             3-month rolling construction program of each Works Contract is enclosed in Appendix C; and the major construction activities undertaken in the Reporting Period is presented in below sub-sections.

Contract 1 (Contract No. NE/2017/07)

2.2.2             The major construction activities of Contract 1 undertaken in this Reporting Period are:-

Ÿ  Precast segment fabrication, shell installation for Portion I.

Ÿ  Erection for bridge segment for Main Bridge at Portion I

Ÿ  Piling Work for Portion I.

Ÿ  E&M work and External Work at Portion V.

Ÿ  Touch up paining and painting of east and west side spans ring weld.

Ÿ  Welding of L3 parapet base plated on steel bridge.

Ÿ  Waterproofing works for division area, footpath area and cycle track area for steel bridge.

Ÿ  Top tension and transverse tension, bottom tension, and external tension at Portion II.

Ÿ  Construction of long stitching and planter wall at Portion II.

Ÿ  Concrete surrounding for ducting at Portion II.

 

Contract 2 (Contract No. NE/2017/08)

2.2.3             The major construction activities of Contract 2 undertaken in this Reporting Period are:-

Ÿ  UU Diversion

Ÿ  Road Work along Wan Po Road

Ÿ  Excavation and Demolition of existing wave wall at Portion I

Ÿ  Monitoring and Instrumentation works

Ÿ  RC construction for U-trough at Portion III, parapet at elevated deck

Ÿ  RC construction for lift shaft and stair case

Ÿ  TCSS Cross road ducts installation at Wan Po Road

Ÿ  Modification of Type 1 Wave wall

Ÿ  Drainage work at Portion I, III

Ÿ  RC Construction of foundation at Wan O Road

Ÿ  Deck construction at cycle track ramp

Ÿ  Utilities installation along At Grade Road

Ÿ  SENB installation at At-Grade Road, Portion III, U-trough

                          

2.3                   Summary of Environmental Submissions

2.3.1             All the documents required under Environmental Permit No. EP-459/2013 were submitted within the required timeframe. The details can be referred to the Monthly Report.

 

2.3.2             Upon completed baseline monitoring, a Baseline Monitoring Report was verified by IEC on 19 November 2018 and submitted to EPD on that day for endorsement.

 

2.3.3             The notification of Project dedicated web site to EPD was made on 9 January 2019 (http://www.envcbltko.hk/).

 

 


3.                       Summary of Environmental Monitoring Programmes and Requirements

3.1                   General

3.1.1             The Environmental Monitoring and Audit Programmes and requirements are set out in the Approved EM&A manual.  Environmental issues such as air quality, construction noise and water quality were identified as the key issues during the construction phase of the Project.  A summary of EM&A programmes and requirements are presented in the sub-sections below.

 

3.2                   Monitoring Parameters

3.2.1             Monitoring parameters of air quality, noise and water quality are summarized in Table 3-1.

Table 3-1      Summary of EM&A Requirements

Environmental Issue

Parameters

Air Quality

Ÿ  1-hour TSP by Real-Time Portable Dust Meter; and

Ÿ  24-hour TSP by High Volume Air Sampler

Noise

Ÿ  Leq (30min) in six consecutive Leq(5 min) between 07:00-19:00 on normal weekdays

Ÿ  Supplementary information for data auditing, statistical results such as L10 and L90 shall also be obtained for reference.

Water Quality

Ÿ  In-situ measurement – Dissolved Oxygen (DO) concentration (mg/L) & saturation (%), pH, Salinity (mg/L), Temperature (ºC) and Turbidity (NTU); and

Ÿ  Laboratory analysis – SS (mg/L)

 

3.3                   Monitoring Locations

Air Quality and Construction Noise

3.3.1             According to the Approved EM&A Manual Section 5.4 and Section 6.3, three (3) representative air sensitive receivers (ASR) and four (4) representative noise sensitive receivers were designated as monitoring stations.  The designated air quality and noise monitoring locations are listed in Table 3-2 and Table 3-3, and illustrated in Appendix D.

Table 3-2      Designated Air Quality Monitoring Location recommended in EM&A Manual

ID

Location in the EM&A Manual

Currently Situation

AM1

Tung Wah Group of Hospitals Aided Primary School & Secondary School

Not yet construct

AM2

Lohas Park Stage 2 (Planned Development in Area 86)

Available for resident occupation in February 2021

AM3

Lohas Park Stage 3 (Planned Development in Area 86)

Under Construction

 

Table 3-3      Designated Construction Noise Monitoring Location recommended by EM&A Manual

ID

Location

Currently Situation

CNMS-1

Lohas Park Stage 1(Planned Development in Area 86, Package 5) (Southeast facade)

Available for resident occupation in November 2019

CNMS-2

Lohas Park Stage 1 (Planned Development in Area 86, Package 6) (Southeast facade)

Available for resident occupation in February 2021

CNMS-3

Lohas Park Stage 3 (Planned Development in Area 86,Package 11) (West facade)

Under Construction

CNMS-4

Tung Wah Group of Hospitals Aided Primary School & Secondary School (Southwest facade)

Not yet construct

 

3.3.2             As observed and confirmed by ET and IEC during the joint site visit on 29th August 2018, the designated air quality and noise monitoring locations are under construction or yet to construct. It is considered that these designated locations are not appropriate to perform air quality and noise monitoring. In this regard, alternative locations were proposed as interim arrangement to carry out air quality and noise monitoring before occupation of the designated monitoring location. A letter enclosed with the alternative location proposal and IEC verification (Our Ref: TCS00975/18/300/L0038) was sent to EPD on 19th October 2018 and the proposal was agreed by EPD. Therefore, air quality and construction noise impact monitoring would be performed at the agreed alternative locations until the designated sensitive receivers occupied and granted the premises. 

 

3.3.3             The designated and interim alternative monitoring location for impact air quality and noise monitoring in the Reporting Period are summarized in Table 3-4 and illustrated in Appendix D.

 

Table 3-4      Designated and interim alternative location for air quality and noise monitoring in the Reporting Period

Location ID

Monitoring Parameter

Location

AM2

1-Hour TSP Air Quality

Lohas Park Phase 6

AM4

1-Hour TSP Air Quality

Podium of Lohas Park Phase 2A (Le Prestige)

AM5

24-Hour TSP Air Quality

Boundary of Site Office near Junction of Wan Po Road and Wan O Road

CNMS-1

Noise (Leq, L10 & L90)

Podium of Lohas Park Package 4

CNMS-2

Noise (Leq, L10 & L90)

Lohas Park Package 6

CNMS-5

Noise (Leq, L10 & L90)

Podium of Lohas Park Phase 2A (Le Prestige)

     Remark:

1. Since 24-Hour TSP Air Quality monitoring is not granted at AM4 Lohas Park Phase 2A, the 24-Hour TSP monitoring was therefore proposed at AM5 which is located at the boundary of the project site office.

2. 24-Hour TSP Air Quality Monitoring at AM2 will be commenced once approval of High Volume Sampler installation was obtained from Lohas Park 6.

 

Water Quality

3.3.4             According to Table 7.1 of the approved EM&A Manual Section 7.4, two Control Stations (C3 & C4), six (6) sensitive receivers (CC1, CC2, CC3, CC4, CC13 & SWI1) and one (1) Gradient station (I1) are recommended to perform water quality monitoring.  Details and coordinate of these water quality monitoring stations are described in Table 3-5 and the locations is shown in Appendix D.

Table 3-5      Location of Water Quality Monitoring Station

Station

Coordinates

Description

Easting

Northing

CC1

843201

816416

Sensitive Receiver – Coral Sites at Chiu Keng Wan

CC2

844076

817091

Sensitive Receiver – Coral Sites at Junk Bay

CC3

844606

817941

Sensitive Receiver – Coral Sites at Junk Island

CC4

845444

815595

Sensitive Receiver – Coral Sites at Fat Tong Chau West

CC13

844200

817495

Sensitive Receiver – Coral Sites at Junk Bay near Chiu Keng Wan

SWI1

845512

817442

Sensitive ReceiverTseung Kwan O Salt Water Intake

C3

843821

816211

Control Station (Ebb Tide) – within Junk Bay

C4

844621

815770

Control Station (Flood Tide) – within Junk Bay

I1

844602

817675

Gradient Station – in between Lam Tin Tunnel (LTT) and CBL

 

3.4                   Monitoring Frequency and Period

3.4.1             To according with the approved EM&A Manual, impact monitoring requirements are presented as follows.

 

Air Quality Monitoring

3.4.2             Air quality impact monitoring frequency is as follows:

Ÿ   Once every 6 days of 24-hour TSP and 3 times of 1-hour TSP monitoring; during course of works throughout the construction period.

 

Construction Noise Monitoring

3.4.3             Construction noise monitoring frequency is as follows:

Ÿ   One set of Leq(30min) measurements in a weekly basis between 07:00 and 19:00 hours on normal weekdays during course of works as throughout the construction period.

Ÿ   If construction works are extended to include works during the hours of 1900-0700, additional weekly impact monitoring shall be carried out during evening and night-time works. Applicable permits under the NCO shall be obtained by the Contractor.

 

Water Quality (Marine Water) Monitoring

3.4.4             Marine water impact monitoring frequency is as follows:

Ÿ   Three days a week, at mid ebb and mid flood tides during course of pile excavation works for the bridge pier foundations underway.  Moreover, the intervals between 2 consecutive sets of monitoring day shall not be less than 36 hours.

 

3.5                   Determination of Action/Limit (A/L) Levels

3.5.1             The baseline results form the basis for determining the environmental acceptance criteria for the impact monitoring.  A summary of the Action/Limit (A/L) Levels for air quality, construction noise and water quality are shown in Tables 3-6, 3-7 and 3-8 respectively.

Table 3-6      Action & Limit Levels of Air Quality (1-Hour & 24-Hr TSP)

Monitoring Station

Action Level (mg /m3)

Limit Level (mg/m3)

1-Hour TSP

24-Hr TSP

1-Hour TSP

24-Hr TSP

AM2

278

NA

500

NA

AM4

278

NA

500

NA

AM5

NA

190

NA

260

Note:     1-Hour & 24-Hr TSP of Action Level = (Average Baseline Results × 1.3 + Limit level)/2

 

Table 3-7      Action and Limit Levels for Construction Noise, dB(A)

Monitoring Location

Action Level

Limit Level

(Leq30min)

Time Period: 0700-1900 hours on normal weekdays

CNMS-1

CNMS-2

CNMS-5

When one or more documented complaints are received

75 dB(A)

Time Period: 1900-2300 hours on all days (Leq15min)

When one or more documented complaints are received

55 dB(A)

Remarks:

1.           Construction noise monitoring will be resumed at the designated locations CNMS-3 and CNMS4 once they are available and permission are granted;

2.           The designated locations CNMS-3 is located at residential building which is still under construction, Limit Level of 75dB(A) will be adopted until they are occupied;

3.           The designated location CNMS-4 is located at planned school and still not yet to construction.  When the school occupied and operated, Limit Level of 70dB(A) should be adopted and should be reduced to 65dB(A) during examination period; and

4.           If construction works are required during restricted hours, the conditions stipulated in the construction noise permit issued by the Noise Control Authority shall be followed.


Table 3-8         Action and Limit Levels for Water Quality

Monitoring Station

Depth Average of SS (mg/L)

Action Level

Limit Level

CC1

7.8

OR 120% of upstream control station at the same tide of the same day

(Control Station C3 at Ebb tide and Control Station C4 at Flood tide), whichever is higher

9.3

OR 130% of upstream control station at the same tide of the same day

(Control Station C3 at Ebb tide and Control Station C4 at Flood tide) , whichever is higher

CC2

9.0

9.2

CC3

8.2

9.0

CC4

13.8

15.4

CC13

8.9

10.3

SWI1

8 mg/L

10 mg/L

 



Monitoring Location

Dissolved Oxygen (mg/L)

Depth Average of Surface and Mid-depth

Bottom

Action Level

Limit Level

Action Level

Limit Level

CC1

5.8

5.7

5.3

5.2

CC2

5.8

5.7

5.3

5.1

CC3

5.5

5.4

4.9

4.7

CC4

5.7

5.7

5.5

5.4

CC13

5.6

5.5

5.3

5.2

SWI1

5.4

4.8

5.1

5.0

 

Monitoring Location

Depth Average of Turbidity (NTU)

Action Level

Limit Level

CC1

5.8

OR 120% of upstream control station at the same tide of the same day

(Control Station C3 at Ebb tide and Control Station C4 at Flood tide) , whichever is higher

6.0

OR 130% of upstream control station at the same tide of the same day

(Control Station C3 at Ebb tide and Control Station C4 at Flood tide) , whichever is higher

CC2

4.6

5.5

CC3

4.8

5.4

CC4