Table of contents

Page

EXECUTIVE SUMMARY.. 1

Introduction. 1

Summary of Main Works Undertaken and Key Measures Implemented. 1

Environmental Monitoring Works. 1

Key Information in the Reporting Month. 4

Reporting Changes. 4

Future Key Issues. 4

1 INTRODUCTION.. 5

Background. 5

Purpose of the Report 6

Project Organizations. 6

Construction Activities undertaken during the Reporting Month. 6

Summary of EM&A Requirements. 6

Status of Environmental Licensing and Permitting. 7

2 AIR Quality.. 8

Monitoring Requirement 8

Monitoring Locations. 8

Monitoring Parameters and Frequency. 8

Monitoring Equipment 8

Monitoring Methodology. 9

Results and Observations. 11

Comparison of EM&A Result with EIA Prediction. 12

3 noise.. 14

Monitoring Requirements. 14

Monitoring Locations. 14

Monitoring Parameters, Frequency and Duration. 14

Monitoring Equipment 15

Monitoring Methodology and QA/QC Procedure. 15

Maintenance and Calibration. 15

Results and Observations. 16

Comparison of EM&A Result with EIA Prediction. 16

4 Water quality.. 18

Monitoring Requirement 18

5 waste management.. 18

6 ecology.. 19

7 fisheries. 19

8 Cultural heritage.. 19

9 Landscape and visual impact.. 20

10 Landfill gas monitoring.. 20

Monitoring Requirement 20

11 HAZARD TO LIFE.. 20

12 ENVIRONmental audit.. 21

Site Audits. 21

Implementation Status of Environmental Mitigation Measures. 21

Implementation Status of Event and Action Plans. 22

13 Environmental non-conformance.. 22

Summary of Complaint, Warning, Notification of any Summons and Successful Prosecution. 22

Summary of Exceedance. 22

14 future Key issues. 22

Monitoring Schedule. 22

Conclusions and recommendations. 23

Conclusions. 23

Recommendations. 23

 

lIST OF TABLES

 

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

Table II Monthly Complaints, Notifications of Summons and Successful Prosecutions in the Reporting Month

Table III Summary of Complaints Details in Reporting Month

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

Table 1.1 Key Project Contacts

Table 1.2 Summary of Environmental License and Permit

Table 2.1 Air Quality Monitoring Locations

Table 2.2 Frequency and Parameters of Air Quality Monitoring

Table 2.3 Air Quality Monitoring Equipment

Table 2.4 Major Dust Source during Air Quality Monitoring

Table 2.5 Comparison of 1-hr TSP Monitoring Data with Predictions in EIA Report

Table 2.6 Comparison of 24-hr TSP Monitoring Data with Predictions in EIA Report

Table 3.1   Noise Monitoring Stations

Table 3.2 Frequency and Parameters of Noise Monitoring

Table 3.3 Noise Monitoring Equipment

Table 3.4 Other Noise Source Identified during Noise Monitoring

Table 3.5 Baseline Noise Level and Noise Limit Level for Monitoring Stations

Table 3.6 Maximum Predicted Mitigated Construction Noise Levels in EIA Report

Table 10.1 Landfill Gas Monitoring Equipment (not used)

Table 12.1 Observations and Recommendations of Site Audit

 

 

 

 

lIST OF FIGUREs

 

Figure 1 Site Layout Plan

Figure 1.2 Organizational Structure for Environmental Management

Figure 2 Locations of Air Quality and Construction Noise Monitoring Stations

 

 

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 Waste Generation in the Reporting Month

Appendix I Site Audit Summary

Appendix J Environmental Mitigation Implementation Schedule (EMIS)

Appendix K Record of Landfill Gas Monitoring by Contractor (not used)

Appendix L Event and Action Plans

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

Appendix N Summary of Exceedance

Appendix O Tentative Construction Programme

 

 

 


EXECUTIVE SUMMARY

Introduction

 

1.             This is the 24th Environmental Monitoring and Audit (EM&A) Report prepared by the Environmental Team (ET), Cinotech Consultants Ltd., for Contract No. ED/2018/04 Trunk Road T2 and Infrastructure Works for Developments at the Former South Apron. This report summarized the monitoring results and audits findings of the EM&A programme under the issued Environmental Permit (EP) No. EP-458/2013/C and in accordance with the EM&A Manual (AEIAR-173/2013) during the reporting month of April 2022.

Summary of Main Works Undertaken and Key Measures Implemented

 

2.      The main works undertaken during the reporting period are as follows:

 

    West bound Drill & Blast Tunnel, RC Structure Construction

    East bound Service Gallery Drill & Blast, Service Gallery A Installation

    East Ventilation Building RB Blinding & Waterproofing, EB Excavation

    CP 33 Excavation

 

3.      Implementation of the key mitigation measures during the reporting period are as follows:

 

Construction Noise

    Construction activities were scheduled to minimize noise nuisance to the nearby sensitive receiver.

    Use of Quality Powered Mechanical Equipment (QPME) on site.

    Erected the noise barrier on site.

Air Quality

    Regularly watering on site to avoid dust generation.

Landscape and Visual

    Tree protection zones were fenced off to protect the existing trees on site.

Environmental Monitoring Works

 

4.      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.

 

5.      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

0

0

1

0

Detail refer to App M

Marine Water Quality

N/A

N/A

N/A

N/A

N/A

Groundwater Level Monitoring (Piezometer Monitoring)

N/A

N/A

N/A

N/A

N/A

Ecological

N/A

N/A

N/A

N/A

N/A

Cultural Heritage

N/A

N/A

N/A

N/A

N/A

Landfill Gas

N/A(1)

N/A

N/A(1)

N/A

N/A

Note: (1): No Action Level for Landfill Gas Monitoring.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Air Quality Monitoring

 

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

 

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

 

Construction Noise Monitoring

 

8.      One (1) Action Level exceedance was recorded due to documented complaint in the reporting month. The Summary of Documented Complaints in the Reporting Month is tabulated in Table III.

 

9.      No Limit Level exceedance for day time construction noise monitoring were recorded in the reporting month. Detail shall refer to Appendix N.

 

Water Quality Monitoring

 

10.  Groundwater quality monitoring had been suspended since October 2019 upon the agreement by EPD. Further details should be founded at Section 4.1.

 

11.  No marine water quality monitoring is required as no marine works will be conducted at the Cha Kwo Ling and Lam Tin areas for this project.

 

12.  As the construction activity is approximately 120m away from the piezometer gate, no piezometer monitoring is required.


 

 

Waste Management

 

13.  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 Appendix H.

Ecological Monitoring

 

14.  No coral monitoring is required as no marine works will be conducted at the Cha Kwo Ling and Lam Tin areas for this project.

 

Fisheries Impact Monitoring

 

15.  No specific fisheries monitoring programme is required during the construction phase.

 

Monitoring on Cultural Heritage

 

16.  As the construction works of Cha Kwo Ling Tunnel from the end of Trunk Road T2 to the TKOLTT at the Eastern Ventilation Building are located more than 100m away from the Cha Kwo Ling Tin Hau temple, no monitoring on cultural heritage is required.

 

Landscape and Visual Monitoring and Audit

 

17.  The implementation of landscape and visual mitigation measures was checked by a registered landscape architect. Recommended follow-up actions have been discharged by the Contractor. Details of the audit findings and implementation status are presented in Section 12.

 

Landfill Gas Monitoring

 

18.  Monitoring of landfill gases was commenced in December 2016. Since no excavation activity for this Project was carried out within the Sai Tso Wan Landfill Consultation Zone in the reporting month, no landfill gas monitoring is required

 

Hazard to Life Monitoring

 

19.  No environmental monitoring and audit is required as no hazard assessment was conducted.

 

Environmental Site Inspection

 

20.  Joint weekly site inspections were conducted by representatives of the Contractor, Engineer and Environmental Team. Details of the audit findings and implementation status are presented in Section 12.


 

Key Information in the Reporting Month

 

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

Table II Summary of Complaints, Notifications of Summons and Successful Prosecutions in the Reporting Month

Event

Event Details

Action Taken

Status

Number

Nature

Complaints Received

1

Noise

Detail refer to App M

Closed

Notifications of any summons & prosecutions received

0

--

N/A

N/A

 

 

 

 

 

 

 

 

 

 

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

 

Table III Summary of Complaints Details in Reporting Month

Complaint Type

Investigation Findings

Follow-up Action / Mitigation Measure

Noise nuisance generated from the construction activities at Portion T1.

According to the investigation result for the 1st, 2nd and 3rd complaint, the construction activities of Trunk Road T2 conducted inside the tunnel area and the construction activities of TKO-LT Tunnel conducted inside the tunnel section at Kwun Tong Side are considered as one of the potential noise source of the ground borne noise nuisance

         Blast door was fully enclosed when construction activities were carried out within tunnel area to prevent, reduce or minimize the emission of airborne noise

         In addition, the Contractor should still maintain good site practices, such as schedule noisy work to the less sensitive hours and provide regularly maintenance for PMEs.

         Contractor is recommended to continue to strictly follow the requirements in the relevant CNP and the approved CNMP.

         According to the condition 3.d point 5 of the CNP (GW-RE1201-21and GW-RE0199-22), the immediate remedial action shall be implemented in case adverse ground-borne noise impact on any noise sensitive receiver is received

Reporting Changes

23.  No reporting change in the reporting month.

 


 

 

Future Key Issues

 

24.  The key works or activities will be anticipated in the next reporting period are as follows:

 

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

Site Activities (May 2022)

Key Environmental Issues

1.       West bound Drill & Blast Tunnel, , RC Structure Construction

2.       East bound Service Gallery Drill & Blast, RC Structure Construction, Service Gallery A Installation

3.       East Ventilation Building RC Structure

4.       CP 33 Excavation

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

 

 

Note:

(A)    Dust generation from haul road, stockpile 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; and

(D)    Wastewater and runoff discharge from site.

 


 

1               INTRODUCTION

Background

1.1         In 2009, Civil Engineering and Development Department (CEDD) commissioned a Kai Tak Development (KTD) Trunk Road T2 and Infrastructure at South Apron Investigation. The assignment covers the provision of the Trunk Road T2 and its connections with the Central Kowloon Route (CKR) at the north apron area and the Tseung Kwan O Lam Tin Tunnel (TKOLTT) to the south in the Cha Kwo Ling area.

1.2         The Trunk Road T2 Project is one of the designated Projects under Schedule 2 of the EIAO proposed in the KTD. CEDD submitted the Project Profile (No. PP-379/2009) on 24 March 2009 for application for an EIA study brief for the Trunk Road T2 Project under the EIAO. Accordingly, an EIA Study Brief (ESB-203/2009) for the Trunk Road T2 Project was issued on 30 April 2009. The Environmental Impact Assessment (EIA) Report for the Trunk Road T2 Project was approved under the Environmental Impact Assessment Ordinance (EIAO) on 19 September 2013. The corresponding Environmental Permit (EP) was issued on 19 September 2013 (EP no.: EP-451/2013).

1.3         The Contract No. ED/2018/04 is the main contract of Trunk Road T2 (T2 Main Works) which comprises mainly the design and construction of a dual two-lane trunk road of approximately 3.0km long with about 2.7km of the trunk road in form of tunnel; ventilation and administration buildings, environmental protection and mitigation works and etc. The EM&A programme under this Contract is governed by the two EPs (EP-451/2013 and EP-458/2013/C) and two EM&A Manuals (AEIAR-174/2013 and AEIAR-173/2013). The work areas of the T2 Main Works are shown in Figure 1 and the works to be executed under this Contract and corresponding EPs are summarized as follows:

Environmental Permit

Works Description

EP-451/2013 Trunk Road T2

Trunk Road T2

     Construction of highway and sub-sea tunnel connecting between Central Kowloon Route and Cha Kwo Ling Tunnel

     Western & Eastern Ventilation Buildings

EP-458/2013/C Tseung Kwan O Lam Tin Tunnel (TKOLTT) and Associated Works

Cha Kwo Ling Tunnel

Construction of Cha Kwo Ling Tunnel from the end of Trunk Road T2 to the TKOLTT at the Eastern Ventilation Building

 

Monitoring Works in Lam Tin under EP-458/2013/C

1.4         Under Agreement No. CE 59/2015 (EP) Tseung Kwan O Lam Tin Tunnel (TKOLLT) and Associated Works, the baseline monitoring works in Lam Tin under the EM&A Manual (AEIAR-173/2013) were conducted by the Environmental Team (ET) for the Agreement No. CE 59/2015 (EP) at the approved monitoring locations, namely AM1, AM2, AM3, AM4, AM4 (A) CM1, CM2, CM3, CM4 and CM5. Impact monitoring within the Lam Tin area shall be conducted by the ET of Contract No. ED/2018/04 upon cessation of Agreement No. CE 59/2015 (EP). The data obtained from the impact monitoring works completed by the ET of Agreement No. CE 59/2015 (EP) will be adopted in this report.


 

1.5         Cinotech Consultants Ltd. was designated as the Environmental Team (ET) to undertake the EM&A works for Trunk Road T2 and Infrastructure Works for Developments at the Former South Apron (hereinafter called the Project).

Purpose of the Report

1.6         This is the 24th Monthly EM&A Report which summarises the impact monitoring results and audit findings for the EM&A programme during the reporting period in April 2022.

Project Organizations

1.7         Different Parties with different levels of involvement in the Project organization include:

    Permit Holder Civil Engineering and Development Department (CEDD)

    Supervisor Representative Hyder-Meinhardt Joint Venture (HMJV)

    Environmental Team (ET) Cinotech Consultants Limited (Cinotech)

    Independent Environmental Checker (IEC) Ramboll Hong Kong Limited (Ramboll)

    Contractor Bouygues Travaux Publics (BTP)

1.8         The key contacts of the Project are shown in Table 1.1.

Table 1.1 Key Project Contacts

Party

Role

Contact Person

Phone No.

CEDD

Permit Holder

Mr. Wong Chi Wai, Tommy

3842 7111

HMJV

Supervisor Representative

Ms. Hazel Tang

2149 8524

Cinotech

Environmental Team

Mr. KS Lee (ETL)

2151 2091

Ms. Karina Chan

2157 3880

Ramboll

Independent Environmental Checker

Mr. YH Hui

3465 2850

BTP

Contractor

Ms. Ality Chan

5185 4462

 

1.9         The Organizational Structure for Environmental Management is shown in Figure 1.2.

Construction Activities undertaken during the Reporting Month

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

    West bound Drill & Blast Tunnel, RC Structure Construction

    East bound Service Gallery Drill & Blast, Service Gallery A Installation

    East Ventilation Building RB Blinding & Waterproofing, EB Excavation

    CP 33 Excavation


     

Summary of EM&A Requirements

1.11     The EM&A programme requires construction noise, air quality monitoring and environmental site audit, etc. The EM&A requirements for each parameter are described in the following sections, including:

    All monitoring parameters;

    Action and Limit levels for all environmental parameters;

    Event Action Plans;

    Environmental mitigation measures, as recommended in the Project EIA Report.

1.12     The advice on the implementation status of environmental protection and pollution control/mitigation measures is summarized in Section 12 of this report.

1.13     This report presents the monitoring results, observations, locations, equipment, period, methodology and QA/QC procedures of the monitoring parameters of the required environmental monitoring works and audit works for the Project in April 2022.

Status of Environmental Licensing and Permitting

1.14     All permits/licenses obtained for the Project are summarized in Table 1.2.

Table 1.2 Summary of Environmental License and Permit

Permit / License No.

Valid Period

Status

From

To

Environmental Permit (EP)

EP-451/2013

19 Sep 2013

N/A

Valid

EP-458/2013/C

20 Jan 2017

N/A

Valid

Notification pursuant to Air Pollution (Construction Dust) Regulation

Ref. No.: 451120

20 Nov 2019

N/A

Valid

Billing Account for Construction Waste Disposal

A/C No.: 7036016

09 Dec 2019

N/A

Valid

Construction Noise Permit

CNP No. (For Portion Q): GW-RE0227-22

24 Mar 2022

23 Sep 2022

Valid

CNP No. (For Portion T1): GW-RE0199-22

05 Mar 2022

04 July 2022

Valid

Wastewater Discharge License

WT00036699-2020

14 Jan 2021

31 Jan 2026

Valid

Chemical Waste Producer License

WPN: 5213-286-B2557-03

09 Mar 2020

N/A

Valid

 


2               AIR Quality

Monitoring Requirement

2.1         According to Section 2.2.4 of the EM&A Manual (AEIAR-173/2013), 1-hour and 24-hour Total Suspended Particulates (TSP) monitoring was conducted to monitor the air quality for this Project. For regular impact monitoring, a sampling frequency of at least once in every six days at all of the monitoring stations for 1-hour and 24-hour TSP monitoring. Appendix A shows the established Action/Limit Levels for the environmental monitoring works.

Monitoring Locations

2.2         Five designated monitoring stations were selected for air quality monitoring programme. Table 2.1 describes the air quality monitoring locations, which are also depicted in Figure 2.

Table 2.1 Air Quality Monitoring Locations

Monitoring Stations

Location

Location of Measurement

AM1

Tin Hau Temple

Ground Level

AM2

Sai Tso Wan Recreation Ground

Ground Level

AM3

Yau Lai Estate Bik Lai House

Rooftop (41/F)

AM4(1)

Sitting-out Area at Cha Kwo Ling Village

Ground Level

AM4(A)(2) (*)

Cha Kwo Ling Public Cargo Working Area Administrative Office

Rooftop (3/F)

Remarks:

(1) For 1-hour TSP monitoring;

(2) For 24-hour TSP monitoring

(*) Air quality monitoring at designated station AM4 (24-hr TSP) was rejected by the premise owners.

Therefore, baseline and impact air quality monitoring works were carried out at alternative air quality monitoring stations AM4 (A) (24-hr TSP only)

 

Monitoring Parameters and Frequency

2.3         Table 2.2 summarizes the monitoring parameters, monitoring period and frequencies of impact air quality monitoring. The monitoring schedule is shown in Appendix D.

 

Table 2.2 Frequency and Parameters of Air Quality Monitoring

Monitoring Stations

Parameter

Period

Frequency

AM1, AM2, AM3, AM4

1-hour TSP

0700 1900

3 times per 6 days

AM1, AM2, AM3, AM4(A)

24-hour TSP

24 hours

Once every 6 days

Monitoring Equipment

2.4         High Volume Samplers (HVS) in compliance with the specification stipulated in the EM&A Manual (AEIAR-173/2013), Section 2.3.1, were used to carry out 24-hour TSP monitoring. Direct reading dust meter were also used to measure 1-hour average TSP levels. The 1-hour sampling was determined by HVS to check the validity and accuracy of the results measured by direct reading method.

2.5         Wind data monitoring equipment was set at rooftop (about 41/F) of Yau Lai Estate Bik Lai House for logging wind speed and wind direction such that the wind sensors are clear of obstructions or turbulence caused by building. The wind data monitoring equipment is re-calibrated at least once every six months and the wind directions are divided into 16 sectors of 22.5 degrees each. The location is shown in Figure 2. This weather information for the reporting month is summarized in Appendix C.

2.6         Table 2.3 summarizes the equipment used for air quality monitoring by the ET for Contract No. CE 59/2015 (EP). Copies of calibration certificates are attached in Appendix B.

Table 2.3 Air Quality Monitoring Equipment

Equipment

Model

Quantity

1-hour TSP Dust Meter

Sibata Model No. LD-5R

(Serial No.: 972781, 972778)

2

HVS Sampler

TISCH Model: TE-5170 (Serial No.: 1536)

1

GMW model: GS2310

(Serial No.: 1287, 10379, 10599)

3

Calibrator

TISCH Model: TE-5025A

(Serial No.: 3864)

1

Wind Anemometer

Davis Weather Monitor II, Model no. 7440

(Serial No.: MC01010A44)

1

 

Monitoring Methodology

1-hour TSP Monitoring

Measuring Procedures

2.7         The measuring procedures of the 1-hour dust meter are in accordance with the Manufacturers Instruction Manual as follows:

(Sibata Model No.: LD-5R)

           The 1-hour dust meter is placed at least 1.3 meters above ground.

           Set POWER to ON and make sure that the battery level was not flash or in low level.

           Allow the instrument to stand for about 3 minutes and then the cap of the air sampling inlet has been released.

           Push the knob at MEASURE position.

            Set time/mode setting to [BG] by pushing the time setting switch. Then, start the background measurement by pushing the start/stop switch once. It will take 6 sec. to complete the background measurement.

            Push the time setting switch to change the time setting display to [MANUAL] at the bottom left of the liquid crystal display. Finally, push the start/stop switch to stop the measuring after 1 hour sampling.

           Information such as sampling date, time, count value and site condition were recorded during the monitoring period.

 

Maintenance/Calibration

2.8         The following maintenance/calibration is required for the 1-hour dust meter:

           Check and calibrate the meter by HVS to check the validity and accuracy of the results measured by direct reading method at 2-month intervals throughout all stages of the air quality monitoring.

 

 

24-hour TSP Monitoring

Instrumentation

2.9         High volume samplers (HVS) (TISCH Model: TE-5170 and GMW Model: GS2310) completed with appropriate sampling inlets were employed for 24-hour TSP monitoring. The sampler was composed of a motor, a filter holder, a flow controller and a sampling inlet and its performance specification complied with that required by USEPA Standard Title 40, Code of Federation Regulations Chapter 1 (Part 50).

2.10     The positioning of the HVS samplers are as follows:

            A horizontal platform with appropriate support to secure the samplers against gusty wind shall be provided;

            No two samplers shall be placed less than 2 meter apart;

            The distance between the sampler and an obstacle, such as buildings, must be at least twice the height that the obstacle protrudes above the sampler;

            A minimum of 2 metres of separation from walls, parapets and penthouses is required for rooftop samplers;

            A minimum of 2 metres of separation from any supporting structure, measured horizontally is required;

            No furnace or incinerator flue is nearby;

            Airflow around the sampler is unrestricted;

            The sampler is more than 20 metres from the dripline;

            Any wire fence and gate, to protect the sampler, shall not cause any obstruction during monitoring;

            Permission must be obtained to set up the samplers and to obtain access to the monitoring stations; and

            A secured supply of electricity is needed to operate the samplers.

 

Operating/analytical procedures for the operation of HVS

2.11     Operating/analytical procedures for the air quality monitoring are highlighted as follows:

           Prior to the commencement of the dust sampling, the flow rate of the high volume sampler was properly set (between 0.6 m3/min. and 1.7 m3/min.) in accordance with the EM&A manual (AEIAR-173/2013). The flow rate shall be indicated on the flow rate chart.

           For TSP sampling, fiberglass filters with a collection efficiency of > 99% for particles of 0.3μm diameter were used.

           The power supply was checked to ensure the sampler worked properly. On sampling, the sampler was operated for 5 minutes to establish thermal equilibrium before placing any filter media at the designated air monitoring station.

           The filter holding frame was then removed by loosening the four nuts and a weighted and conditioned filter was carefully centered with the stamped number upwards, on a supporting screen.

           The filter was aligned on the screen so that the gasket formed an airtight seal on the outer edges of the filter. Then the filter holding frame was tightened to the filter holder with swing bolts. The applied pressure should be sufficient to avoid air leakage at the edges.

           The shelter lid was closed and secured with the aluminum strip.

           The timer was then programmed. Information was recorded on the record sheet, which included the starting time, the weather condition and the filter number (the initial weight of the filter paper can be found out by using the filter number).

           After sampling, the filter was removed and sent to the HOKLAS laboratory (ALS Technichem (HK) Pty Ltd.) for weighing. The elapsed time was also recorded.

           Before weighing, all filters were equilibrated in a conditioning environment for 24 hours. The conditioning environment temperature should be between 25蚓 and 30蚓 and not vary by more than 3蚓; the relative humidity (RH) should be < 50% and not vary by more than 5%. A convenient working RH is 40%.

 

Maintenance/Calibration

2.12     The following maintenance/calibration is required for the HVS:

           The high volume motors and their accessories were properly maintained. Appropriate maintenance such as routine motor brushes replacement and electrical wiring checking were made to ensure that the equipment and necessary power supply are in good working condition.

High volume samplers were calibrated at bi-monthly intervals using TE-5025A Calibration Kit throughout all stages of the air quality monitoring.

 

Results and Observations

2.13     The impact monitoring works for air quality monitoring locations AM1, AM2, AM3, AM4 and AM4 (A) are completed by the ET of Agreement No. CE 59/2015 (EP), and the data will be adopted in this report.

2.14     The impact air quality monitoring was conducted at all five monitoring stations as scheduled. The monitoring schedule is shown in Appendix D.

2.15     No Action/ Limit Level exceedance were recorded for 24-hour TSP monitoring in the reporting month.

2.16     No Action/ Limit Level exceedance was recorded for 1-hour TSP monitoring in the reporting month.

2.17     The monitoring data and graphical presentations of 1-hour and 24-hour TSP monitoring results are shown in Appendix E and Appendix F respectively.

2.18     According to field observations by ET for Agreement No. CE 59/2015 (EP) in the reporting period, the major dust source identified at the designated air quality monitoring stations are as follows:

 

 

Table 2.4 Major Dust Source during Air Quality Monitoring

Monitoring Stations

Major Dust Source

AM1 Tin Hau Temple

Road Traffic at Cha Kwo Ling Road, non-project related influence and the construction activity from other construction site

AM2 Sai Tso Wan Recreation Ground

Road Traffic along Sin Fat Road

AM3 Yau Lai Estate Bik Lai House

Road Traffic near Eastern Cross Harbour Tunnel Toll Plaza, non-project related influence and the construction activity from other construction site

AM4 - Sitting-out Area at Cha Kwo Ling Village

Road Traffic at Cha Kwo Ling Road

AM4(A) - Cha Kwo Ling Public Cargo Working Area Administrative Office

Road Traffic at Cha Kwo Ling Road

 

Comparison of EM&A Result with EIA Prediction

2.19     The air monitoring data was compared with the predictions (with the assessment height of 1.5 mAG) in Table 3.17 of EIA Report, AEIAR-173/2013 (as approved in 2013) as summarised in Table 2.5 and Table 2.6.

Table 2.5 Comparison of 1-hr TSP Monitoring Data with Predictions in EIA Report

Monitoring Stations

ASR ID

Predicted Maximum 1-hr TSP Concentration in EIA Report (AEIAR-173/2013), μg/m3

Maximum 1-hr TSP Concentration in the Reporting Month
(April 2022),
μg/m3

AM1 Tin Hau Temple

CL1

707

79.2

AM2 Sai Tso Wan Recreation Ground

CL6

266

81.9

AM3 Yau Lai Estate Bik Lai House

CL9

507

72.6

AM4 - Sitting-out Area at Cha Kwo Ling Village

CL16

430

85.8

 

 

 

Table 2.6 Comparison of 24-hr TSP Monitoring Data with Predictions in EIA Report

Monitoring Stations

ASR ID

Predicted Maximum 24-hr TSP Concentration in EIA Report (AEIAR-173/2013), μg/m3

Maximum 24-hr TSP Concentration in the Reporting Month
(April 2022),
μg/m3

AM1 Tin Hau Temple

CL1

199

109.4

AM2 Sai Tso Wan Recreation Ground

CL6

109

61.1

AM3 Yau Lai Estate Bik Lai House

CL9

123

115.7

AM4(A) - Cha Kwo Ling Public Cargo Working Area Administrative Office (*)

N/A(1)

N/A(1)

105.5

Remarks:

(1)     No 24-hr TSP concentration was predicted in EIA Report (AEIAR-173/2013)

(*) Air quality monitoring at designated station AM4 (24-hr TSP) was rejected by the premise owners. Therefore, baseline and impact air quality monitoring works were carried out at alternative air quality monitoring stations AM4 (A) (24-hr TSP only)

 

2.20     In the reporting month, the 1-hour TSP concentrations at AM1, AM2, AM3 and AM4 were lower than the prediction in the EIA Report, AEIAR-173/2013 (as approved in 2013). No Action/Limit level exceedance was recorded in the reporting period.

2.21     In the reporting month, the 24-hour TSP concentrations at AM1 AM2 and AM3 were lower than the prediction in the EIA Report, AEIAR-173/2013 (as approved in 2013). No Action/ Limit level exceedance was recorded in the reporting period. Details of the exceedance shown in Appendix N.

 


3               noise

Monitoring Requirements

3.1         According to Section 3.2.1 of the EM&A Manual (AEIAR-173/2013), construction noise monitoring was conducted to monitor the construction noise arising from the construction activities. The regular monitoring frequency for each monitoring station shall be on a weekly basis and conduct one set of measurements between 0700 and 1900 hours on normal weekdays. Appendix A shows the established Action and Limit Levels for the environmental monitoring works.

Monitoring Locations

3.2         Noise monitoring was conducted at five designated monitoring stations, namely CM1, CM2, CM3, CM4 and CM5 in the reporting period. Table 3.1 and Figure 2 show the locations of these stations.

Table 3.1   Noise Monitoring Stations

Monitoring Stations

Location

Location of Measurement

CM1

Nga Lai House, Yau Lai Estate Phase 1, Yau Tong

Rooftop (41/F)

CM2

Bik Lai House, Yau Lai Estate Phase 1, Yau Tong

Rooftop (41/F)

CM3

Block S, Yau Lai Estate Phase 5, Yau Tong

Rooftop (40/F)

CM4

Tin Hau Temple, Cha Kwo Ling

Ground Level

CM5

CCC Kei Faat Primary School, Yau Tong

Rooftop (6/F)

 

Monitoring Parameters, Frequency and Duration

3.3         Table 3.2 summarizes the monitoring parameters, frequency and total duration of monitoring. The noise monitoring schedule is shown in Appendix D.

Table 3.2 Frequency and Parameters of Noise Monitoring

Monitoring Stations

Time Period

Duration

Frequency

Parameter

Measurement

CM1

0700-1900 hrs on normal weekdays

30 minutes

Once per week

L10(30 min.) dB(A)

 

L90(30 min.) dB(A)

 

Leq(30 min.) dB(A)

Fa蓷de Measurement

CM2

Fa蓷de Measurement

CM3

Fa蓷de Measurement

CM4

Fa蓷de Measurement

CM5

Fa蓷de Measurement

Monitoring Equipment

3.4         Integrating Sound Level Meter was used for impact noise monitoring. The meters were Type 1 sound level meter capable of giving a continuous readout of the noise level readings including equivalent continuous sound pressure level (Leq) and percentile sound pressure level (Lx) that also complied with International Electrotechnical Commission Publications 651:1979 (Type 1) and 804:1985 (Type 1) specifications. Table 3.3 summarizes the noise monitoring equipment being used by the ET for Agreement No. CE 59/2015 (EP) within the reporting period. Copies of calibration certificates are attached in Appendix B.

Table 3.3 Noise Monitoring Equipment

Equipment

Model

Quantity

Integrating Sound Level Meter

SVAN 957 (Serial No.: 23852, 21455)

2

Calibrator

ST-120 (Serial No.: 181001608)

1

Monitoring Methodology and QA/QC Procedure

3.5         The monitoring procedures are as follows:

              The monitoring station was normally be at a point 1m from the exterior of the sensitive receivers building fa蓷de and be at a position 1.2m above the ground.

              For free field measurement, the meter was positioned away from any nearby reflective surfaces. All records for free field noise levels were adjusted with a correction of +3 dB(A).

              The battery condition was checked to ensure the correct functioning of the meter.

              Parameters such as frequency weighting, the time weighting and the measurement time were set as follows:

-            Frequency weighting: A

-            Time weighting: Fast

-            Time measurement: 30 minutes

              Prior to and after each noise measurement, the meter was calibrated using a Calibrator for 94.0 dB at 1000 Hz. If the difference in the calibration level before and after measurement was more than 1.0 dB, the measurement would be considered invalid and repeat of noise measurement would be required after re-calibration or repair of the equipment.

              The wind speed was frequently checked with the portable wind meter.

              At the end of the monitoring period, the Leq, L90 and L10 were recorded. In addition, site conditions and noise sources were recorded on a standard record sheet.

              Noise monitoring would be cancelled in the presence of fog, rain, and wind with a steady speed exceeding 5 m/s, or wind with gusts exceeding 10 m/s. Supplementary monitoring would be provided to ensure sufficient data would be obtained.

Maintenance and Calibration

3.6         The microphone head of the sound level meter and calibrator were cleaned with a soft cloth at quarterly intervals.

3.7         The sound level meter and calibrator were checked and calibrated at yearly intervals.

3.8         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 levels from before and after the noise measurement agree to within 1.0 dB.

Results and Observations

3.9         The data obtained from the impact monitoring works completed by the ET of Agreement No. CE 59/2015 (EP) will be adopted in this report.

3.10     One (1) Action Level exceedance was recorded due to the documented complaint in the reporting month.

3.11     No Limit Level exceedance was recorded for day-time construction noise monitoring in the reporting month. Detail shall refer to Appendix N.

3.12     Noise monitoring results and graphical presentations are shown in Appendix G.

3.13     According to field observations by ET for Agreement No. CE 59/2015 (EP) in the reporting period, the major noise sources identified at the noise monitoring stations are shown in Table 3.4.

Table 3.4 Other Noise Source Identified during Noise Monitoring

Monitoring Stations

Major Noise Source

CM1

Road Traffic near Eastern Cross Harbour Tunnel Toll Plaza, non-project related construction activities

CM2

Road Traffic near Eastern Cross Harbour Tunnel Toll Plaza, non-project related construction activities

CM3

Road Traffic near Eastern Cross Harbour Tunnel Toll Plaza non-project related construction activities

CM4

Road Traffic at Cha Kwo Ling Road, non-project related construction activities

CM5

Road Traffic near Eastern Cross Harbour Tunnel Toll Plaza,

Construction activity from other construction site,

Road Traffic at Yau Tong Road

.

Table 3.5 Baseline Noise Level and Noise Limit Level for Monitoring Stations

Monitoring Stations

Baseline Noise Level, dB (A)
(at 0700 1900 hrs on normal weekdays)

Noise Limit Level, dB (A) (at 0700 1900 hrs on normal weekdays)

CM1

65.5

75

CM2

63.6

CM3

65.6

CM4

62.0

CM5

68.2

70*

(*) Noise Limit Level is 65 dB(A) during school examination periods.

 

Comparison of EM&A Result with EIA Prediction

3.14     The noise monitoring data was compared with the predictions in Table 4.15 of EIA Report (AEIAR-173/2013) as summarised in Table 3.6.

 

Table 3.6 Maximum Predicted Mitigated Construction Noise Levels in EIA Report

Monitoring Stations

NSR ID

Maximum Predicted Mitigated Construction Noise Levels in EIA Report (AEIAR-173/2013), dB(A)

Maximum Construction Noise Levels in the Reporting Month
(April 2022),
Leq (30min) dB(A)

CM1 Nga Lai House, Yau Lai Estate Phase 1, Yau Tong

N1102

73

75.3

CM2 Bik Lai House, Yau Lai Estate Phase 1, Yau Tong

N1204

75

75.6

CM3 Block S, Yau Lai Estate Phase 5, Yau Tong

N2105

75

75.7

CM4 Tin Hau Temple, Cha Kwo Ling

N3101a

73

65.4

CM5 CCC Kei Faat Primary School, Yau Tong

N4101

71

69.8

3.15     The result at CM1, CM2 and CM3 were higher than the maximum predicted mitigated construction noise level in the EIA Report, AEIAR-173/2013 (as approved in 2013), that may due to the fluctuation of road traffic near Eastern Cross Harbour Tunnel Toll Plaza and the non-project related construction activities. However, the results at CM4and CM5 were lower than the maximum predicted mitigated construction noise level in the EIA Report, AEIAR-173/2013 (as approved in 2013). No Limit level exceedance was recorded in the reporting period. Detail of exceedance is presented in Appendix N.


 

4               Water quality

Monitoring Requirement

Groundwater Quality

4.1         The existing groundwater quality monitoring programme has been suspended as the monitoring results had been deemed non-representative of the impact from the project justified by two major factors: (1) influence on the monitoring results from non-project related factors, such as anthropogenic activities and natural phenomenon; and (2) large separation between the monitoring stations and works area. In addition, as no alternative locations for the groundwater quality monitoring were available, the groundwater quality monitoring has been suspended since October 2019 upon the agreement by EPD.

Marine Water Quality

4.2         According to Section 4.4.3 of EM&A Manual (AEIAR-173/2013), marine water quality impact monitoring stations is carried out during marine construction for TKOLTT reclamation. Since the construction of Cha Kwo Ling Tunnel from the end of Trunk Road T2 to the TKOLTT at the Eastern Ventilation Building does not involve reclamation, the marine water quality monitoring programme stated in Section 4.4 of the EM&A Manual (AEIAR-173/2013) is therefore not applicable to Contract No. ED/2018/04.

Groundwater Level Monitoring (Piezometer Monitoring)

4.3         According to Section 4.1.2 of EM&A Manual (AEIAR-173/2013), daily piezometer monitoring will be carried out on a daily basis when any tunnel construction activities are carried out within +/- 50m of the piezometer gate in plan. As the construction works of Cha Kwo Ling Tunnel from the end of Trunk Road T2 to the TKOLTT at the Eastern Ventilation Building is approximately 120m away from the piezometer gate in plan, the piezometer monitoring programme stated in Section 4.2 of the EM&A Manual (AEIAR-173/2013) is therefore not applicable to Contract No. ED/2018/04.

5               waste management

5.1         According to Section 5.1.2 of the EM&A Manual (AEIAR-173/2013), Waste materials generated during construction activities, such as construction and demolition (C&D) materials and general refuse, are recommended to be audited at regular intervals (at least quarterly) to ensure that proper storage, transportation and disposal practices are being implemented by the Contractor. To fulfil this requirement, site audits are carried out on a weekly basis. The summaries of site audits are attached in Appendix I.

5.2         With reference to relevant handling records of this Project, the quantities of different types of waste generated in the reporting month are summarised and presented in Appendix H.


 

6               ecology

 

Post-Translocation Coral Monitoring

6.1         Post-translocation monitoring survey is recommended in Section 6.2.5 of the EM&A Manual (AEIAR-173/2013), to audit the success of coral translocation. Since the construction of Cha Kwo Ling Tunnel from the end of Trunk Road T2 to the TKOLTT at the Eastern Ventilation Building does not involve any marine works in the concerned area mentioned in Section 6.1.2 of the EM&A Manual (AEIAR-173/2013), the post-translocation monitoring survey stated in Section 6.2.5 of the EM&A Manual (AEIAR-173/2013) is therefore not applicable to Contract No. ED/2018/04.

7               fisheries

7.1         According to Section 7.1.3 of EM&A Manual (AEIAR-173/2013), no specific fisheries monitoring programme is required during the construction phase.

7.2         The implementation of the mitigation measures stated in the Water Quality Impact Assessment (Refer to Section 5 of EIA Report (AEIAR-173/2013)) will be audited as part of the EM&A procedures during the construction period. The summaries of site audits are attached in Appendix I.

8               Cultural heritage

 

8.1         According to Condition 3.7 of EP-458/2013/C and Section 8.2.1 of the EM&A Manual (AEIAR-173/2013), monitoring of vibration impacts was conducted when the construction works are less than 100m from the Built Heritage in close proximity of the worksite, namely the Cha Kwo Ling Tin Hau temple. Tilting and settlement monitoring should be applied on the Cha Kwo Ling Tin Hau Temple.

 

8.2         As the construction works of Cha Kwo Ling Tunnel from the end of Trunk Road T2 to the TKOLTT at the Eastern Ventilation Building are located more than 100m away from the Cha Kwo Ling Tin Hau temple, the vibration impact monitoring stated in Section 8.3.1 of the EM&A Manual (AEIAR-173/2013) is not applicable to Contract No. ED/2018/04.

 

Mitigation Measures for Cultural Heritage

 

8.3         According to Condition 3.6 of EP-458/2013/C, to prevent damage to Cha Kwo Ling Tin Hau Temple and its Fung Shui rocks (Child-given rocks) during the construction phase, a temporarily fenced-off buffer zone (Rocks buffer zone is 5 m from the edge of Rocks and 15m from the edge of Rocks alter) with allowance for public access (minimum 1 m) around the temple and the Fung Shui rocks shall be provided. The open yard in front of the temple should be kept as usual for annual Tin Hau festival.

 

 

8.4         As there is a large buffer distance from the current works to Cha Kwo Ling Tin Hau Temple and the Fung Shui rocks (Child-given rocks), the temporarily fenced-off rocks buffer zone and from the edge of Rocks alter is not required. The fenced-off rocks buffer zone would be implemented when there is construction activities in vicinity of the cultural heritage.

 

9               Landscape and visual impact

9.1         According to Section 9.3 of the EM&A Manual (AEIAR-173/2013), landscape and visual mitigation measures during the construction phase shall be checked to ensure that they are fully realized and implemented on site.

9.2         Site audits were carried out on a weekly basis to monitor and audit the timely implementation of landscape and visual mitigation measures listed in Environmental Mitigation Implementation Schedule (EMIS) (shown in Appendix J).

9.3         The implementation of landscape and visual mitigation measures was checked by a registered landscape architect. No non-compliance of the landscape and visual impact was recorded in the reporting month. Details of the audit findings and implementation status are presented in Appendix I.

 

10           Landfill gas monitoring

Monitoring Requirement

10.1     In accordance with Section 10.1.1 of the EM&A Manual (AEIAR-173/2013), monitoring of landfill gas is required for construction works within the Sai Tso Wan Landfill Consultation Zone during the construction phase. Since no excavation activity for this Project was carried out within the Sai Tso Wan Landfill Consultation Zone in the reporting month, no landfill gas monitoring is required.

11           HAZARD TO LIFE

 

11.1     According to Section 11.1.1 of EM&A Manual (AEIAR-173/2013), as no overnight storage of explosive on site is required for the construction of the Project, the hazard assessment is deemed not necessary. Thus, environmental monitoring and audit is not required.


 

12           ENVIRONmental audit

Site Audits

12.1     Site audits were carried out on a weekly basis to monitor the timely implementation of proper environmental management practices and mitigation measures in the Project site. The summaries of site audits are attached in Appendix I.

12.2     Site audits were conducted on 07, 13, 21 and 28 April 2022 in the reporting month. Site inspection of the IEC was conducted on 07 April 2022. No non-compliance was observed during the site audit.

Implementation Status of Environmental Mitigation Measures

12.3     According to Environmental Permits, the approved EIA Reports (Register No.: AEIAR-174/2013 and AEIAR-173/2013), and the EM&A Manuals of the Project (AEIAR-174/2013 and AEIAR-173/2013), the mitigation measures detailed in the documents are recommended to be implemented during the construction phase. An Environmental Mitigation Implementation Schedule (EMIS) is provided in Appendix J.

12.4     The ET weekly site inspections were carried out during the reporting month and the observations and recommendations are summarized in Table 12.1. Refer to Appendix I for the site inspection summary reports in the reporting month.

Table 12.1 Observations and Recommendations of Site Audit

Parameters

Date

Observations and Recommendations

Follow-up

Air Quality

N/A

There was no observation in the reporting period.

N/A

Noise

N/A

There was no observation in the reporting period.

N/A

Water Quality

N/A

There was no observation in the reporting period.

N/A

Ecology

N/A

There was no observation in the reporting period.

N/A

Landscape and Visual

N/A

There was no observation in the reporting period.

N/A

Waste / Chemical Management

07 April 2022

Receptacles of waste shall be provided on site. Timely disposal of waste was recommended.

Waste skip was provided and timely disposal of waste was implemented on site.

Permits /Licences

N/A

There was no observation in the reporting period.

N/A

 


 

Implementation Status of Event and Action Plans

12.5     The Event and Action Plans for air quality and construction noise monitoring, and the Limit Levels and Action Plan for landfill gas monitoring are presented in Appendix L.

Air Quality Monitoring

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

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

 

Construction Noise Monitoring

        One (1) Action Level exceedance was recorded due to the documented complaint in the reporting month.

        No Limit Level exceedance for construction noise monitoring was recorded in the reporting month.

13           Environmental non-conformance

Summary of Complaint, Warning, Notification of any Summons and Successful Prosecution

13.1     The summaries of environmental complaint, warning, summon and notification of successful prosecution for the Project is presented in Appendix M.

Summary of Exceedance

13.2     The summary of exceedance record in the reporting month is shown in Appendix N.

14           future Key issues

14.1     Tentative construction programmes for the next three months are provided in Appendix O.

14.2     Major site activities undertaken for the coming months are summarized as follows:

    West bound Drill & Blast Tunnel, , RC Structure Construction

    East bound Service Gallery Drill & Blast, RC Structure Construction, Service Gallery A Installation

    East Ventilation Building RC Structure

    CP 33 Excavation

14.3     Key environmental issues in the coming months include:

    Make sure noise mitigation measures are implemented accordingly;

    Make sure drainage system is adequately designed to prevent flooding during periods of heavy rain; and,

    Make sure mitigation measure for dust suppression are implemented on site.

Monitoring Schedule

14.4     The tentative environmental monitoring schedule for the next month is shown in Appendix D.


Conclusions and recommendations

Conclusions

14.5     This is the 24th Monthly EM&A Report which presents the EM&A works undertaken during the reporting month in accordance with the EM&A Manual (AEIAR-173/2013) and the requirement under EP.

Air Quality Monitoring

14.6     No Action/Limit Level exceedance was recorded for 1-hour TSP monitoring in the reporting month.

14.7     No Action/ Limit Level exceedance was recorded for 24-hour TSP monitoring in the reporting month.

Construction Noise Monitoring

14.8     One (1) Action Level exceedance was recorded due to documented complaint in the reporting month.

14.9     No Limit Level exceedance for construction noise monitoring was recorded in the reporting month.

Site Audit

14.10 4 ET joint weekly environmental site inspections were conducted in the reporting month.

Complaint, Notification of Summons and Successful Prosecution

14.11 One (1) environmental complaint was received in the reporting period. No notifications of summons and successful prosecutions were received in the reporting month.

Recommendations

14.12 According to the environmental audit performed in the reporting month, the following recommendations were made:

 

Air Quality

         General refuse should be stored in enclosed bins or compaction units separate from C&D material.