Table of Contents

 

 

EXECUTIVE SUMMARY.. 3

1.......... INTRODUCTION.. 6

1.1                          Purpose of the Report 6

1.2                          Report Structure. 6

2.......... Project Information.. 7

2.1                          Background. 7

2.2                          Site Description. 7

2.3                          Construction Programme and Activities. 8

2.4                          Project Organization. 9

2.5                          Status of Environmental Licences, Notification and Permits. 10

3.......... Environmental Monitoring Requirements. 11

3.1                          Construction Dust Monitoring. 11

3.2                          Construction Noise Monitoring. 14

3.3                          Construction Water Monitoring. 16

3.4                          Landscape and Visual 17

4.......... Implementation Status of Environmental Mitigation Measures. 18

5.......... Monitoring Results. 19

5.1                          Construction Dust Monitoring. 19

5.2                          Regular Construction Noise Monitoring. 19

5.3                          Construction Water Monitoring. 20

5.4                          Waste Management 21

5.5                          Landscape and Visual 21

6.......... ENVIRONMENTAL SITE INSPECTION AND AUDIT.. 22

7.......... Environmental Non-conformance.. 23

7.1                          Summary of Monitoring Exceedances. 23

7.2                          Summary of Environmental Non-Compliance. 24

7.3                          Summary of Environmental Complaints. 24

7.4                          Summary of Environmental Summon and Successful Prosecutions. 24

8.......... FUTURE KEY ISSUES. 25

8.1                          Construction Programme for the Next Three Months. 25

8.2                          Key Issues for the Coming Month. 25

8.3                          Monitoring Schedule for the Coming Month. 25

9.......... ConclusionS AND RECOMMENDATIONS. 26

9.1                          Conclusions. 26

9.2                          Recommendations. 27

 

 

List of Tables

 

Table 2.1........... Construction Activities in the reporting month. 8

Table 2.2........... Contact Information of Key Personnel 9

Table 2.3........... Status of Environmental Licenses, Notifications and Permits. 10

Table 3.1 ......... Air Quality Monitoring Equipment 11

Table 3.2 ......... Location of Construction Dust Monitoring Station. 11

Table 3.3 ......... Noise Monitoring Parameters, Frequency and Duration. 14

Table 3.4 ......... Noise Monitoring Equipment for Regular Noise Monitoring. 14

Table 3.5 ......... Noise Monitoring Stations during Construction Phase. 14

Table 3.6 ......... Noise Monitoring Parameters, Frequency and Duration. 15

Table 3.7       Water Quality Monitoring Equipment 16

Table 3.8       Impact Water Quality Monitoring Stations. 16

Table 3.9       Water Quality Monitoring Parameters, Frequency and Duration. 17

Table 4.1........... Status of Required Submission under Environmental Permit 18

Table 5.1 ......... Summary of 24-hour TSP Monitoring Result in the Reporting Period. 19

Table 5.2 ......... Summary of 1-hour TSP Monitoring Result in the Reporting Period. 19

Table 5.3 ......... Summary of Construction Noise Monitoring Results in the Reporting Period. 19

Table 5.4       Summary of Impact Water Quality Monitoring Results in September 2020. 20

Table 5.5       Summary of Impact Water Quality Monitoring Results in October 2020. 20

Table 5.6       Summary of Water Quality Exceedances in October 2020. 21

Table 6.1 ......... Observations and Recommendations of Site Audit 22

Table 8.1........... Construction Activities in the coming three months. 25

 

 

List of Figures

 

Figure 1.1

Site Layout Plan

Figure 3.1

Location of Air Quality Monitoring Station

Figure 3.2

Locations of Noise Monitoring Station

Figure 3.3

Locations of Water Monitoring Station

 

List of Appendices

 

Appendix A

Construction Programme

Appendix B

Project Organization Structure

Appendix C

Implementation Schedule of Environmental Mitigation Measures

Appendix D

Summary of Action and Limit Levels

Appendix E

Calibration Certificates of Equipment

Appendix F

EM&A Monitoring Schedules

Appendix G

Air Quality Monitoring Results and their Graphical Presentations

Appendix H

Noise Monitoring Results and their Graphical Presentations

Appendix I

Water Monitoring Results

Appendix J

Detail of Water Quality Exceedance

Appendix K

Appendix L

Event and Action Plan

Cumulative Statistics on Complaints, Notification of Summons and Successful Prosecutions

Appendix M

Monthly Summary Waste Flow Table

 

EXECUTIVE SUMMARY

Central Kowloon Route – Kai Tak West (CKR-KTW; Contract No. HY/2014/07) (hereafter called “the Project”) covers part of the construction of the Central Kowloon Route (CKR).

 

The Project comprises the follow works:

 

·     50x30m access shaft with noise enclosure at Ma Tau Kok (MTK);

·     100m long cut-and-cover (C&C) tunnel at MTK;

·     Demolition and re-provisioning of MTK Public Pier;

·     160m long underwater tunnel (UWT) (Stage 1);

·     210m long UWT (Stage 2);

·     60m long C&C tunnel at Kai Tak;

·     130m long depressed road and 200m long underpass at Kai Tak;

·     390m long underground tunnel ventilation adit at Kai Tak;

·     Seawall demolition and construction of new landing steps; and

·     Barging Point enclosure and conveyor system.

 

The EM&A programme commenced on 4 April 2018.The impact EM&A for the Project includes air quality, noise and water quality monitoring.

 

This is the thirty-first monthly EM&A Report presenting the EM&A works carried out during the period between 1 and 31 October 2020. As informed by the Contractor, major activities in the reporting period were:

 

Locations

Site Activities

Kai Tak

·         Casting tunnel wall at underpass and ventilation adit;

·         Base slab and wall, roof slab construction at underpass and depressed road;

·         Backfilling at underpass

·         Removal of ELS at underpass and depressed road;

·         Falsework erection at underpass, depressed road and cut & cover tunnel.

Ma Tau Kok

·         TTM implementation;

·         Pipe piling works for cut and cover tunnel;

·         Rock Excavation;

·         Shotcreting at the Access Shaft;

·         Fresh water pipe installation works;

·         Constrcution of MTK east wall and traffic deck;

·         Steel post and roof panel installation at Covered Walkway.

Kowloon Bay

·         Concrete packing between wailing and CPP Wall;

·         Roof slab and base slab construction;

·         Waterproofing application;

·         Removal of gas pipe line.

Barging Point

·         Barging point operation (Spoil Disposal).

Breaches of Action and Limit Levels for Air Quality

All 24-hour TSP result was below the Action and Limit Levels at all monitoring locations in the reporting month.

All 1-hour TSP result was below the Action and Limit Levels at all monitoring locations in the reporting month.

Breaches of Action and Limit Levels for Noise

Three (3) noise-related complaints were received in the reporting month. Based on the investigation result from finalized investigation reports, proper implementation of mitigation measures for noise conducted by the Contractor during daytime and restricted hours and comply with the condition of approved Construction Noise Mitigation Measures Plan and valid Construction Noise Permit. Also, there is no non-compliance recorded based on compliance check of PMEs and noise monitoring results. Therefore, three action levels of construction noise were triggered, and the investigation reports were finalized on 3, 9 and 11 November 2020 respectively.

 

Regular Noise Monitoring
No Limit Level exceedance of noise was recorded at the monitoring stations in the reporting month.

Breaches of Action and Limit Levels for Water

After received the remaining laboratory results of Copper and Total PAHs in September 2020, no unreported Action level and Limit level exceedance was recorded for both parameters.

Based on the findings from the completed IRs on 21, 23, 25 and 28 September 2020, the exceedances were unrelated to the Project.

No Action level and Limit level exceedance were recorded at measured DO in reporting month and Total PAHs until 21 October 2020.

Eleven (11) Action Level and three (3) Limit level exceedances were recorded at measured Turbidity level in the reporting month.

Four (4) Action Level and six (6) Limit Level exceedances were recorded at measured Suspended Solids level in the reporting month.

Three (3) Action Level and two (2) Limit Level exceedances were recorded at measured Copper Level until 21 October 2020.

Some of laboratory results of Copper and Total PAHs in October 2020 were in progress, the exceedance summary for those parameters will be reported in next reporting period.

Based on the findings from the completed IRs on 5, 7 and 10 October 2020, the exceedances were unrelated to the Project.

Except for the exceedances on 12, 14, 19, 21, 28 and 30 October 2020, where the investigation is undergoing, and the investigation results will be presented in the next monthly EM&A report. Nevertheless, the Contractor was reminded to ensure provision of ongoing maintenance to the silt curtains.

Complaint, Notification of Summons and Successful Prosecution

Three (3) complaints in noise (one received by the Highway Department and Gammon Construction Limited which summarized on 28 October 2020 and two received by Environmental Protection Department on 29 October 2020) were all referred by the Contractor on 30 October 2020. Those investigation reports were finalized on 3, 9 and 11 November 2020 respectively.

No environmental related notification of summons and successful prosecution were received in the reporting month.

Reporting Changes

No report changes in the reporting period.
Future Key Issues

Key issues to be considered in the next three months included:

 

Locations

Site Activities

Kai Tak

·         Base slab and wall, roof slab construction at cut & cover, underpass and depressed road;

·         Backfilling works and ELS removal at cut & cover, underpass and depressed road;

·         Dismantle of working platform.

Ma Tau Kok

·         TTM implementation;

·         Rock excavation;

·         Pipe piling works for cut and cover tunnel east portion;

·         Fresh water pipe installation works;

·         Constrcution of traffic deck;

·         Covered walkway construction;

·         Relocation of MTK public pier.

Kowloon Bay

·         Backfilling and ELS removal works;

·         Roof slab, base slab and wall construction;

·         Removal of gas pipe line;

·         Waterproofing application;

·         Preparation works for Stage 2 UWT.

Barging Point

·         Barging point operation (Spoil Disposal).

 

Potential environmental impacts arising from the above construction activities are mainly associated with construction dust, construction noise, water pollution control, and waste management.


 

1              INTRODUCTION

Gammon Construction Limited was commissioned by the Highways Department as the Civil Contractor for Works Contract HY/2014/07. AECOM Asia Company Limited (AECOM) was appointed by Gammon Construction Limited as the Environmental Team (ET) to undertake the Environmental Monitoring and Audit (EM&A) programme during construction phase of the Project.

1.1          Purpose of the Report

1.1.1      This is the thirty-first monthly EM&A Report which summaries the impact monitoring results and audit findings for the Project during the reporting period between 1 and 31 October 2020.

1.2          Report Structure

1.2.1      This monthly EM&A Report is organized as follows:

·     Section 1: Introduction

·     Section 2: Project Information

·     Section 3: Environmental Monitoring Requirement

·     Section 4: Implementation Status of Environmental Mitigation Measures

·     Section 5: Monitoring Results

·     Section 6: Environmental Site Inspection and Audit

·     Section 7: Environmental Non-conformance

·     Section 8: Future Key Issues

·     Section 9: Conclusions and Recommendations

 

 


2              Project Information

2.1          Background

2.1.1      CKR is a dual 3-lane trunk road across central Kowloon linking the West Kowloon in the west and the Kai Tak Development (KTD) in the east. The CKR will be about 4.7 km long with an underground tunnel section of about 3.9 km long, in particular, there will be an underwater tunnel of about 370 m long in Kowloon Bay to the north of the To Kwa Wan Typhoon Shelter. It will connect the West Kowloon Highway at Yau Ma Tei Interchange with the road network at Kowloon Bay and the future Trunk Road T2 at KTD which will connect to the future Tseung Kwan O – Lam Tin Tunnel (TKO-LTT) and Cross Bay Link (CBL). CKR, Trunk Road T2 and TKO-LTT will form a strategic highway link, namely Route 6, connecting West Kowloon and Tseung Kwan O. In addition, 3 ventilation buildings, which will be located in Ya Ma Tei, Ho Man Tin and ex-Kai Tak airport area, are proposed to ensure acceptable air quality within the tunnel.

2.1.2      The Environmental Impact Assessment (EIA) Report for Central Kowloon Route (Register No.: AEIAR-171/2013) was approved on 11 July 2013 under the Environmental Impact Assessment Ordinance (EIAO). Following the approval of the EIA Report, an Environmental Permit (EP) for CKR was granted on 9 August 2013 (EP No.: EP- 457/2013) for the construction and operation. Variation of EP (VEP) was subsequently applied and the latest EP (EP No. EP-457/2013/C) was issued by the Director of Environmental Protection (DEP) on 16 January 2017. Further Environmental Permit (EP No. FEP-01/457/2013/C) for CKR – Kai Tak West was issued on 28 February 2018.

2.1.3      The construction of the CKR had been divided into different sections. This Work Contract HY/2014/07 – Kai Tak West (KTW) (“The Project”) will include a road which is a trunk road, including new roads, and major extensions or improvements to existing roads; a road fully enclosed by decking above and by structure on the sides for more than 100 m; and reclamation works (including associated dredging works) more than 1 ha in size and a boundary of which is less than 100 m from an existing residential area.

2.1.4      The site layout plan of the Project is shown in Figure 1.1.

2.2          Site Description

2.2.1      The major construction activities under this Project include:

(a)   construction of approximately 160m long cut-and-cover tunnel and 370m long underwater tunnel between the tunnel section at Ma Tau Kok and the depressed road of the CKR within Kai Tak Development;

(b)   reconstruction of the seawall at Ma Tau Kok public pier, and the sloping seawall at the Former Kai Tak Airport Runway;

(c)   construction of approximately 125m long depressed road and 200m long underpass of the CKR within Kai Tak Development;

(d)   construction of approximately 360m long underground tunnel ventilation adit of the CKR;

(e)   reconstruction of Kowloon City Ferry Pier Public Transport Interchange; and

(f)    other associated works.

 


2.3          Construction Programme and Activities

2.3.1      The major construction activities undertaken in the reporting month are summarized in Table 2.1.

Table 2.1          Construction Activities in the reporting month

Locations

Site Activities

Kai Tak

·         Casting tunnel wall at underpass and ventilation adit;

·         Base slab and wall, roof slab construction at underpass and depressed road;

·         Backfilling at underpass

·         Removal of ELS at underpass and depressed road;

·         Falsework erection at underpass, depressed road and cut & cover tunnel.

Ma Tau Kok

·         TTM implementation;

·         Pipe piling works for cut and cover tunnel;

·         Rock Excavation;

·         Shotcreting at the Access Shaft;

·         Fresh water pipe installation works;

·         Constrcution of MTK east wall and traffic deck;

·         Steel post and roof panel installation at Covered Walkway.

Kowloon Bay

·         Concrete packing between wailing and CPP Wall;

·         Roof slab and base slab construction;

·         Waterproofing application;

·         Removal of gas pipe line.

Barging Point

·         Barging point operation (Spoil Disposal).

 

2.3.2      The construction programme is presented in Appendix A.


2.4          Project Organization

2.4.1      The project organization structure is shown in Appendix B. The key personnel contact names and numbers for the Project are summarized in Table 2.2.

Table 2.2          Contact Information of Key Personnel

Party

Role

Position

Name

Telephone

Fax

Arup-Mott MacDonald Joint Venture

Residential Engineer (ER)

Engineer’s Representative

 

Mr. Jeffrey Lau

 

2268 3640

 

2268 3954

 

ERM

Independent Environmental Checker (IEC)

Independent Environmental Checker

Ms. Mandy To

2271 3313

2723 5660

Gammon

Contractor

Contracts Manager

Mr. Alan Yan

2516 8823

2516 6260

Environmental Manager

Ms Michelle Tang

9267 8866

2516 6260

AECOM

Contractor’s Environmental Team (ET)

ET Leader

Mr. Y T Tang

3922 9393

2317 7609


2.5          Status of Environmental Licences, Notification and Permits

2.5.1      Relevant environmental licenses, permits and/or notifications on environmental protection for this Project and valid in the reporting month are summarized in Table 2.3.

Table 2.3          Status of Environmental Licenses, Notifications and Permits 

Permit / License No. / Notification/ Reference No.

Valid Period

Status

Remarks

From

To

Further Environmental Permit

FEP-01/457/2013/C

28 Feb 2018

End of Project

Valid

--

Wastewater Discharge License

WT00030290-2018

22 Mar 2018

31 May 2023

Valid

Ma Tau Kok

WT00030668-2018

27 Apr 2018

30 Apr 2023

Valid

Site Office at Kai Tak West

WT00030358-2018

27 Apr 2018

30 Apr 2023

Valid

Kai Tak West

WT00030333-2018

27 Apr 2018

30 Apr 2023

Valid

Barging Point at Portions 4B & 4C

WT00030330-2018

27 Apr 2018

30 Apr 2023

Valid

Kowloon Bay

Construction Noise Permit

GW-RE0709-20

27 Aug 2020

26 Feb 2021

Valid

Barging Point Operation at Kai Tak Barging Point

GW-RE0603-20

4 Aug 2020

3 Nov 2020

Valid

Rock Breaking at Ma Tau Kok

GW-RE0534-20

23 Jun 2020

21 Dec 2020

Superseded by GW-RE0874-20

General Works at Kai Tak

GW-RE0874-20

20 Oct 2020

14 Apr 2021

Valid on 20 Oct 2020

GW-RE0478-20

13 Jun 2020

12 Dec 2020

Valid

ELS Installation and Excavation at Stage 1 Underwater Tunnel

GW-RE0761-20

1 Oct 2020

31 Mar 2021

Valid on 1 Oct 2020

Kai Tak Haul Road

Chemical Waste Producer Registration

5118-247-G2347-47

30 Jan 2018

End of Project

Valid

--

5118-247-G2347-48

30 Jan 2018

End of Project

Valid

--

Marine Dumping Permit

EP/MD/21-038

8 Oct 2020

7 Apr 2021

Valid on 8 Oct 2020

Sediments requiring Type 1 - Open Sea Disposal

EP/MD/21-049

24 Sep 2020

23 Oct 2020

Valid until 23 Oct 2020

Sediments requiring Type 1 (Dedicated Site) and Type 2 Confined Marine Disposal

EP/MD/21-063

24 Oct 2020

23 Nov 2020

Valid on 24 Oct 2020

EP/MD/21-056

20 Sep 2020

19 Oct 2020

Valid until 19 Oct 2020

Sediments requiring Type 3 disposal (Filled up by 70%)

Billing Account for Construction Waste Disposal

7029909

22 Jan 2018

End of Project

Account Active

--

7031949

27 Aug 2020

26 Nov 2020

Account Active

Billing Account for Disposal of Construction Waste (by vessels)

Notification Under Air Pollution Control (Construction Dust) Regulation

429442

5 Jan 2018

5 Jul 2025

Notified

--


3              Environmental Monitoring Requirements

 

3.1        Construction Dust Monitoring

Monitoring Requirements

3.1.1      In accordance with the approved EM&A Manual, measurement of 24-hour and 1-hour Total Suspended Particulates (TSP) level at the designated air quality monitoring station is required. Impact 24-hour TSP monitoring should be carried out for at least once every 6 days, and 1-hour TSP monitoring should be done at least 3 times every 6 days while the highest dust impact is expected. The Action and Limit Levels of the air quality monitoring is provided in Appendix D.

Monitoring Equipment

3.1.2      24-hour TSP air quality monitoring was performed using High Volume Sampler (HVS) located at the designated monitoring station. The HVS meets all the requirements of the EM&A Manual.

3.1.3      A portable direct reading dust meter was used to carry out the 1-hour TSP monitoring.

3.1.4      Brand and model of the equipment is given in Table 3.1.

Table 3.1         Air Quality Monitoring Equipment

Equipment

Brand and Model

High Volume Sampler
(24-hour TSP)

Tisch Total Suspended Particulate Mass Flow Controlled High Volume Air Sampler
(Model No. TE-5170)

Calibration Kit

(24-hour TSP)

TISCH Environmental Orifice
(Model TE-5025A)

Portable direct reading dust meter
(1-hour TSP)

Sibata Digital Dust Monitor
(Model No. LD-3)

 

Monitoring Locations

3.1.5      The monitoring station for construction dust monitoring pertinent to the Project has been identified based on the approved EM&A Manual for the Project.  The location of the construction dust monitoring station is summarized in Table 3.2 and shown in Figure 3.1.

Table 3.2         Location of Construction Dust Monitoring Station

Location

Monitoring Station

Description

E-A14a [1]

Block B of Merit Industrial Centre

Rooftop (13/F)

Note:

[1] The air monitoring station proposed in the EM&A Manual (i.e. Wyler Gardens with ID: E-A14) was not available for impact dust monitoring, therefore impact monitoring was conducted at E-A14a as an alternative which was agreed by the ER, IEC and EPD.

 

Monitoring Methodology

 

3.1.6      24-hour TSP Monitoring

(a)           The HVS was installed in the vicinity of the air sensitive receivers.  The following criteria were considered in the installation of the HVS as far as practicable: -

 

(i)            A horizontal platform with appropriate support to secure the sampler against gusty wind was provided.

(ii)           Two samplers should not be placed less than 2m apart from each other;

(iii)          The distance between the HVS and any obstacles, such as buildings, was at least twice the height that the obstacle protrudes above the HVS.

(iv)          A minimum of 2 meters separation from walls, parapets and penthouse for rooftop sampler.

(v)           A minimum of 2 meters separation from any supporting structure, measured horizontally is required.

(vi)          No furnace or incinerator flues nearby.

(vii)         Airflow around the sampler was unrestricted.

(viii)        The sampler was located more than 20 meters from any dripline.

(ix)          Any wire fence and gate, required to protect the sampler, did not obstruct the monitoring process.

(x)           Permission was obtained to set up the samplers and access to the monitoring station.

(xi)          A secured supply of electricity was obtained to operate the sampler.

 

(b)           Preparation of Filter Papers

 

(i)            Glass fibre filters, G810 were labelled and sufficient filters that were clean and without pinholes were selected.

(ii)           All filters were equilibrated in the conditioning environment for 24 hours before weighing. The conditioning environment temperature was around 25 °C and not variable by more than ±3 °C; the relative humidity (RH) was < 50% and not variable by more than ±5%. A convenient working RH was 40%.

(iii)          All filter papers were prepared and analysed by ALS Technichem (HK) Pty Ltd., which is a HOKLAS accredited laboratory and has comprehensive quality assurance and quality control programmes.

 

(c)           Field Monitoring

 

(i)            The power supply was checked to ensure the HVS works properly.

(ii)           The filter holder and the area surrounding the filter were cleaned.

(iii)          The filter holder was removed by loosening the four bolts and a new filter, with stamped number upward, on a supporting screen was aligned carefully.

(iv)          The filter was properly aligned on the screen so that the gasket formed an airtight seal on the outer edges of the filter.

(v)           The swing bolts were fastened to hold the filter holder down to the frame.  The pressure applied was sufficient to avoid air leakage at the edges.

(vi)          Then the shelter lid was closed and was secured with the aluminium strip.

(vii)         The HVS was warmed-up for about 5 minutes to establish run-temperature conditions.

(viii)        A new flow rate record sheet was set into the flow recorder.

(ix)          On site temperature and atmospheric pressure readings were taken and the flow rate of the HVS was checked and adjusted at around 1.3 m3/min, and complied with the range specified in the EM&A Manual (i.e. 0.6-1.7 m3/min).

(x)           The programmable digital timer was set for a sampling period of 24 hrs, and the starting time, weather condition and the filter number were recorded.

(xi)          The initial elapsed time was recorded.

(xii)         At the end of sampling, on site temperature and atmospheric pressure readings were taken and the final flow rate of the HVS was checked and recorded.

(xiii)        The final elapsed time was recorded.

(xiv)        The sampled filter was removed carefully and folded in half length so that only surfaces with collected particulate matter were in contact.

(xv)         It was then placed in a clean envelope and sealed.

(xvi)        All monitoring information was recorded on a standard data sheet.

(xvii)       Filters were then sent to ALS Technichem (HK) Pty Ltd. for analysis.

 

(d)           Maintenance and Calibration

 

(i)            The HVS and its accessories were maintained in good working condition, such as replacing motor brushes routinely and checking electrical wiring to ensure a continuous power supply.

(ii)           HVSs were calibrated using TE-5025A Calibration Kit upon installation and thereafter at bi-monthly intervals.

(iii)          Calibration certificate of the TE-5025A Calibration Kit and the HVSs are provided in Appendix E.

 

 

3.1.7      1-hour TSP Monitoring

(a)           Measuring Procedures

 

The measuring procedures of the 1-hour dust meter are in accordance with the Manufacturer’s Instruction Manual as follows:

(i)            Turn the power on.

(ii)           Close the air collecting opening cover.

(iii)          Push the “TIME SETTING” switch to [BG]

(iv)          Push “START/STOP” switch to perform background measurement for 6 seconds.

(v)           Turn the knob at SENSI ADJ position to insert the light scattering plate.

(vi)          Leave the equipment for 1 minute upon “SPAN CHECK” is indicated in the display.

(vii)         Push “START/STOP” switch to perform automatic sensitivity adjustment. This measurement takes 1 minute.

(viii)        Pull out the knob and return it to MEASURE position.

(ix)          Push the “TIME SETTING” switch the time set in the display to 3 hours.

(x)           Lower down the air collection opening cover.

(xi)          Push “START/STOP” switch to start measurement.

 

(b)           Maintenance and Calibration

 

(i)            The 1-hour TSP meter was calibrated at 1-year intervals against a continuous particulate TEOM Monitor, Series 1400ab.  Calibration certificates of the Laser Dust Monitors are provided in Appendix E.

 

Monitoring Schedule for the Reporting Month

3.1.8      The schedule for environmental monitoring in October 2020 is provided in Appendix F.


3.2        Construction Noise Monitoring

Monitoring Requirements

3.2.1      In accordance with the EM&A Manual, impact noise monitoring should be conducted for at least once a week during the construction phase of the Project. Table 3.3 summarizes the monitoring parameters, frequency and duration of impact noise monitoring. The Action and Limit Levels of the noise monitoring is provided in Appendix D.

Table 3.3         Noise Monitoring Parameters, Frequency and Duration

Parameter and Duration

Frequency

30-mins measurement at each monitoring station between 0700 and 1900 on normal weekdays. Leq, L10 and L90 would be recorded.

At least once per week

Monitoring Equipment

3.2.2      Noise monitoring was performed using sound level meter at each designated monitoring station.  The sound level meters deployed comply with the International Electrotechnical Commission Publications (IEC) 651:1979 (Type 1) and 804:1985 (Type 1) specifications.  Acoustic calibrator was deployed to check the sound level meters at a known sound pressure level.  Brand and model of the equipment is given in Table 3.4.

Table 3.4         Noise Monitoring Equipment for Regular Noise Monitoring

Equipment

Brand and Model

Integrated Sound Level Meter

B&K (Model No. 2250-L & 2238)

Acoustic Calibrator

B&K (Model No. CAL21)

Monitoring Locations

3.2.3      The monitoring stations for construction noise monitoring pertinent to the Project have been identified based on the approved EM&A Manual for the Project.  Locations of the noise monitoring stations are summarized in Table 3.5 and shown in Figure 3.2.

Table 3.5         Noise Monitoring Stations during Construction Phase

Location

Monitoring Station

Description

Measurement

E-N12a [1]

19 Hing Yan Street

Rooftop (9/F)

Façade

E-N21a [1]

Block B of Merit Industrial Centre

Rooftop (13/F)

Free field[2]

Notes:

[1] The noise monitoring stations proposed in the EM&A Manual (i.e. Grand Waterfront Tower 3 with ID: E-N12 and Hang Chien Court Block J with ID: E-N21) were not available for impact noise monitoring, therefore impact monitoring was conducted at E-N12a and E-N21a as an alternative which was agreed by the ER, IEC and EPD.

[2]  A correction of +3 dB(A) was made to the free field measurements.

Monitoring Parameters, Frequency and Duration

3.2.4      Table 3.6 summarizes the monitoring parameters, frequency and duration of impact noise monitoring.


Table 3.6         Noise Monitoring Parameters, Frequency and Duration

Location

Parameter and Duration

Frequency

E-N12a and E-N21a

30-mins measurement at each monitoring station between 0700 and 1900 on normal weekdays. Leq, L10 and L90 would be recorded.

At least once per week

 

Monitoring Methodology

3.2.5      Monitoring Procedure

(a)           The sound level meter was set on a tripod at a height of 1.2 m above the ground.

(b)           Façade measurement was made at E-N12a.

(c)           Free field measurements was made at monitoring location E-N21a. A correction of +3 dB(A) shall be made to the free field measurements.

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

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

(i)            frequency weighting

(ii)           time weighting: Fast

(iii)          time measurement: Leq(30-minutes) during non-restricted hours i.e. 0700 – 1900 on normal weekdays.

(f)            Prior to and after each noise measurement, the meter was calibrated using the acoustic calibrator for 94 dB(A) at 1000 Hz.  If the difference in the calibration level before and after measurement was more than 1 dB(A), the measurement would be considered invalid and repeat of noise measurement would be required after re-calibration or repair of the equipment.

(g)           During the monitoring period, the Leq, L10 and L90 were recorded.  In addition, site conditions and noise sources were recorded on a standard record sheet.

(h)           Noise measurement was paused during periods of high intrusive noise (e.g. dog barking, helicopter noise) if possible. Observations were recorded when intrusive noise was unavoidable.

(i)            Noise monitoring was cancelled in the presence of fog, rain, wind with a steady speed exceeding 5m/s, or wind with gusts exceeding 10m/s.

 

3.2.6      Maintenance and Calibration

(a)           The microphone head of the sound level meter was cleaned with soft cloth at regular intervals.

(b)           The meter and calibrator were sent to the supplier or HOKLAS laboratory to check and calibrate at yearly intervals.

(c)           Calibration certificates of the sound level meters and acoustic calibrators are provided in Appendix E.

 

Monitoring Schedule for the Reporting Month

3.2.7      The schedule for environmental monitoring in October 2020 is provided in Appendix F.


 

3.3        Construction Water Monitoring

Monitoring Requirements

3.3.1      According[CHC(1]  to the Contractor information, intermittent dredging activity carried out from 10 September to 10 November 2020.

3.3.2      In accordance with the approval EM&A Manual, the impact monitoring shall be conducted during dredging period. The monitoring shall normally be established by measuring the Dissolved Oxygen (DO), temperature, turbidity, pH, salinity, Suspended Solids (SS), Copper level and total PAHs at all designated locations. The Action and Limit Levels of the water quality monitoring is provided in Appendix D.

3.3.3      The measurement shall be taken at all designated monitoring stations including control stations, 3 days per week, at mid-flood and mid-ebb tides. Tidal range of individual flood and ebb tides should be not less than 0.5m. The interval between two sets of monitoring shall not be less than 36 hours.

3.3.4      All the monitoring shall be taken at 3 water depths, namely 1m below water surface, mid-depth station and 1m above sea bed, except where the water depth less than 6m, the mid-depth station may be omitted. Should the water depth be less than 3m, only the mid-depth station will be monitored.

Monitoring Equipment

3.3.5      The brand and model of water quality monitoring equipment is given in Table 3.7.

Table 3.7      Water Quality Monitoring Equipment

Equipment

Brand and Model

Detection Limit

Dissolved Oxygen Meter

YSI 6820 V2

 

0 – 20 mg/L
and

 0-200% saturation

Water Temperature Meter

0-45 degree Celsius

Salinity Meter

0-40 parts per thousand (ppt)

Turbiditimeter

0-1000 NTU

pH meter

pH 0.0 to 14.0

Water Sampler

Kahlsico Water Sampler

N.A

Echo Sounder

Eagle Cuda-168

N.A

Global Positioning System

JRC DGPS 224 Model JLR-4341 with J-NAV 500 Model NWZ4551

N.A

Monitoring Locations

3.3.6      In accordance with the Updated EM&A Manual, the water monitoring stations for baseline water quality monitoring is presented in Table 3.8 and shown in Figure 3.3.

Table 3.8       Impact Water Quality Monitoring Stations

Type of Station

Station

Location

Easting

Northing

Water Quality Monitoring Station

IS1

Planned Kai Tak Cooling Water Intake (subject to its implementation)

839050

819377

IS2

To Kwa Wan Typhoon Shelter

838450

819399

IS3

Tai Wan Salt Water Intake

837948

818202

Control Station

C1

Control Station 1

837787

817712

C2

Control Station 2

838237

818804

C3

Control Station 3

839105

819019

 

Monitoring Parameters, Frequency and Duration

3.3.7      The monitoring parameters, frequency and duration of water quality monitoring are summarized in Table 3.9.

Table 3.9       Water Quality Monitoring Parameters, Frequency and Duration

Parameter

Frequency and Duration

Dissolved Oxygen, Temperature, Turbidity, pH value, Salinity, Suspended Solids, Copper and Total PAHs

Three days per week,

at mid-flood and mid-ebb tides

Monitoring Methodology

3.3.8      The water quality monitoring procedures are presented in the following:

Ÿ  All monitoring equipment were checked and calibrated before use. Responses of sensors and electrodes were also checked with certified standard solutions before each use.

Ÿ  The interval between 2 sets of monitoring was not less than 36 hours.

Ÿ  Individual flood and ebb tides not less than 0.5m.

Ÿ  At least 3 replicate in-situ measurements and water sampling were carried out in each sampling event.

Ÿ  Measurements were taken at 3 water depths, namely 1m below water surface, mid-depth and 1m above sea bed, except where the water depth less than 6m, the mid-depth station may be omitted. Should the water depth be less than 3m, only the mid-depth station was monitored.

Ÿ  Analysis of suspended solids was carried out by ALS Technichem (HK) Pty Ltd.  Sufficient water samples were collected at the monitoring stations for carrying out the laboratory analysis. The analysis followed the standard methods as described in APHA Standard Methods for the Examination of Water and Wastewater, 19th Edition (APHA 2540D for SS).

Ÿ  Analysis of copper was carried out by ALS Technichem (HK) Pty Ltd.  Sufficient water samples were collected at the monitoring stations for carrying out the laboratory analysis. The analysis followed the standard methods as described in USEPA Method for inductively coupled plasma-mass spectrometry (ICP-MS), Revision 1 (ICP-MS USEPA 6020A for copper).

Ÿ  Analysis of total polycyclic aromatic hydrocarbon (PAHs) was carried out by ALS Technichem (HK) Pty Ltd.  Sufficient water samples were collected at the monitoring stations for carrying out the laboratory analysis. The analysis followed the standard methods as described in USEPA Methods for Gas Chromatography-Mass Spectrometry Detector, Revision 3, (GC-MSD USEPA 3510C,USEPA 3630C,USEPA 8270C for total PAHs).

Ÿ  Water samples for suspended solids measurements were collected in high density polythene bottles, packed in ice (cooled to 4oC without being frozen), and delivered to a HOKLAS laboratory as soon as possible after collection.

3.3.9      All monitoring equipment were certified by a laboratory accredited under HOKLAS. Calibration certificates of all monitoring equipment are provided in Appendix E.

Monitoring Schedule for the Reporting Month

3.3.10    The schedule for environmental monitoring in October 2020 is provided in Appendix F.

3.4          Landscape and Visual

3.4.1      As per the EM&A Manuals, the landscape and visual mitigation measures shall be implemented and site inspections should be undertaken once every two weeks during the construction period. A summary of the implementation status is presented in Section 6.


 

4              Implementation Status of Environmental Mitigation Measures

4.1.1      The Contractor has implemented environmental mitigation measures and requirements as stated in the EIA Reports, the EP and EM&A Manuals. The implementation status of the environmental mitigation measures during the reporting period is summarized in Appendix C. Status of required submissions under the EP during the reporting period is summarised in Table 4.1.

Table 4.1          Status of Required Submission under Environmental Permit

EP Condition

Submission

Submission Date

Condition 3.4 of
EP- 457/2013/C
and
Condition 3.4 of
FEP-01/457/2013/C

Monthly EM&A Report for September 2020

14 October 2020

 

 

5              Monitoring Results

5.1          Construction Dust Monitoring

5.1.1      The monitoring results for 24-hour TSP and 1-hour TSP are summarized in Table 5.1 and Table 5.2 respectively.  Detailed air quality monitoring results and daily extract of meteorological observations are presented in Appendix G.

Table 5.1         Summary of 24-hour TSP Monitoring Result in the Reporting Period

ID

Average (mg/m3)

Range (mg/m3)

Action Level (mg/m3)

Limit Level (mg/m3)

E-A14a

48.9

34.2 – 60.8

197.3

260

 

Table 5.2         Summary of 1-hour TSP Monitoring Result in the Reporting Period

ID

Average (mg/m3)

Range (mg/m3)

Action Level (mg/m3)

Limit Level (mg/m3)

E-A14a

64.9

59.8 – 76.7

302.4

500

 

5.1.2      No Action and Limit Level exceedance was recorded for 24-hour TSP monitoring at the monitoring location in the reporting month.

5.1.3      No Action and Limit Level exceedance was recorded for 1-hour TSP monitoring at the monitoring location in the reporting month.

5.1.4      The event and action plan is annexed in Appendix K.

5.1.5      Major dust sources during the monitoring included construction dust and nearby traffic emission.

5.2          Regular Construction Noise Monitoring

5.2.1      The monitoring results for noise are summarized in Table 5.3 and the monitoring data is provided in Appendix H.

Table 5.3         Summary of Construction Noise Monitoring Results in the Reporting Period

ID

Range, dB(A), Leq (30 mins)

Limit Level, dB(A), Leq (30 mins)

E-N12a

65.2 – 69.3

75

E-N21a

60.6 – 68.4

75

 

5.2.2      Three (3) noise-related complaints were received in the reporting month. Based on the investigation result from finalized investigation reports, proper implementation of mitigation measures for noise conducted by the Contractor during daytime and restricted hours and comply with the condition of approved Construction Noise Mitigation Measures Plan and valid Construction Noise Permit. Also, there is no non-compliance recorded based on compliance check of PMEs and noise monitoring results. Therefore, three action levels of construction noise were triggered, and the investigation reports were finalized on 3, 9 and 11 November 2020 respectively.

5.2.3      No Limit Level exceedance of noise was recorded at the monitoring station in the reporting month.

5.2.4      The event and action plan is annexed in Appendix K.

5.2.5      Major noise sources during the monitoring included construction noise from the Project site and nearby traffic noise.

5.3          Construction Water Monitoring

5.3.1      The impact water quality monitoring for 6 locations were carried out 3 days per week in October 2020. The impact monitoring data are presented in Appendix I.

5.3.2      The weather condition during the monitoring period were mainly sunny and fine and occasionally cloudy and rainy. No major pollution source and extreme weather, which might affect the results, was observed during the impact monitoring period.

5.3.3      The impact water quality monitoring results in September and October 2020 are summarized in Table 5.4 and Table 5.5 respectively.

Table 5.4  Summary of Impact Water Quality Monitoring Results in September 2020

Locations

Parameters

Temperature (oC)

pH value

Dissolved Oxygen (mg/L)

Turbidity

(NTU)

 

Salinity

(ppt)

Suspended Solids (mg/L)

 

Copper
(µg/L)

Total PAHs

(µg/L)

Surface & Middle

Bottom

CS1

Avg.

28.06

8.14

5.62

5.46

3.18

31.59

3.69

1.47

<1.60

Min.

24.42

7.90

4.70

4.59

2.04

29.87

2.30

<1.00

<1.60

Max.

29.29

8.34

6.54

6.20

4.60

34.46

7.20

2.67

<1.60

CS2

Avg.

28.09

8.15

5.57

5.49

3.25

31.50

3.89

1.21

<1.60

Min.

24.66

7.87

4.64

4.62

1.81

29.91

2.27

<1.00

<1.60

Max.

29.29

8.36

6.21

6.14

5.51

34.04

8.61

2.11

<1.60

CS3

Avg.

28.10

8.14

5.67

5.61

3.41

31.46

3.73

1.28

<1.60

Min.

24.72

7.88

4.63

4.63

1.81

30.05

2.29

<1.00

<1.60

Max.

29.29

8.37

6.35

6.23

5.80

33.88

8.32

2.22

<1.60

IS1

Avg.

28.11

8.15

5.65

5.60

3.58

31.44

3.82

1.31

<1.60

Min.

24.77

7.89

4.64

4.64

1.69

29.94

2.28

<1.00

<1.60

Max.

29.29

8.38

6.31

6.24

6.51

33.73

7.97

2.56

<1.60

IS2

Avg.

28.11

8.15

5.67

5.62

3.37

31.43

3.85

1.38

<1.60

Min.

24.79

7.89

4.63

4.61

1.80

29.91

2.06

<1.00

<1.60

Max.

29.30

8.38

6.23

6.16

6.54

33.67

10.06

2.78

<1.60

IS3

Avg.

28.07

8.15

5.55

5.42

3.40

31.56

3.94

1.25

<1.60

Min.

24.55

7.87

4.62

4.60

2.20

29.94

1.76

<1.00

<1.60

Max.

29.29

8.36

6.23

6.10

5.12

34.26

9.52

2.22

<1.60

Table 5.5  Summary of Impact Water Quality Monitoring Results in October 2020

Locations

Parameters

Temperature (oC)

pH value

Dissolved Oxygen (mg/L)

Turbidity

(NTU)

 

Salinity

(ppt)

Suspended Solids (mg/L)

 

Copper1
(µg/L)

Total PAHs1

(µg/L)

Surface & Middle

Bottom

CS1

Avg.

25.59

7.98

6.15

6.13

3.89

34.16

3.82

-

-

Min.

22.55

7.34

5.43

5.37

2.43

30.33

2.21

-

-

Max.

28.72

8.22

6.76

6.79

9.07

35.67

6.59

-

-

CS2

Avg.

25.59

7.98

6.15

6.13

3.64

34.09

3.92

-

-

Min.

22.61

7.38

5.34

5.26

1.60

30.07

2.54

-

-

Max.

28.69

8.17

6.75

6.74

8.13

35.63

6.81

-

-

CS3

Avg.

25.59

7.98

6.15

6.13

3.57

34.09

4.32

-

-

Min.

22.68

7.39

5.52

5.10

1.38

30.01

2.51

-

-

Max.

28.70

8.16

6.76

6.76

8.14

35.61

7.08

-

-

IS1

Avg.

25.60

7.97

6.16

6.12

3.64

34.09

3.88

-

-

Min.

22.66

7.40

5.61

5.29

1.37

29.98

2.33

-

-

Max.

28.69

8.16

6.76

6.75

7.80

35.62

6.26

-

-

IS2

Avg.

25.61

7.98

6.16

6.13

3.68

34.07

4.04

-

-

Min.

22.63

7.40

5.57

5.21

1.57

29.99

2.37

-

-

Max.

28.71

8.17

6.75

6.74

7.42

35.62

7.42

-

-

IS3

Avg.

25.59

7.98

6.17

6.14

3.79

34.13

4.13

-

-

Min.

22.54

7.38

5.51

5.34

1.88

30.40

2.48

-

-

Max.

28.69

8.18

6.74

6.75

8.28

35.63

7.38

-

-

Note:

 

1. Some of laboratory results of Copper and Total PAHs in October 2020 were in progress, the summary for those parameters will be reported in next reporting period.

 

5.3.4      Exceedances were recorded for turbidity, suspended solids and copper in the reporting month. Number of exceedances recorded in October 2020 at each impact station are summarised in Table 5.6 and Appendix J.

Table 5.6  Summary of Water Quality Exceedances in October 2020

Station

Exceedance Level

DO (S&M)

DO (Bottom)

Turbidity

Suspended Solids

Copper1

Total PAHs1

Action

Limit

Action

Limit

Action

Limit

Action

Limit

Action

Limit

Action

Limit

IS1

Ebb

0

0

0

0

1

1

0

1

0

0

0

0

Flood

0

0

0

0

2

0

0

1

1

0

0

0

IS2

Ebb

0

0

0

0

1

1

1

1

0

0

0

0

Flood

0

0

0

0

3

0

0

0

1

1

0

0

IS3

Ebb

0

0

0

0

1

0

2

3

0

0

0

0

Flood

0

0

0

0

3

1

1

0

1

1

0

0

 

Total

0

0

0

0

11

3

4

6

3

2

0

0

Note:

 

1. Some of laboratory results of Copper and Total PAHs in October 2020 were in progress, the summary for those parameters will be reported in next reporting period.

5.3.5      The event and action plan is annexed in Appendix K.

 

5.4          Waste Management

5.4.1      C&D materials and wastes sorting were carried out on site. Receptacles were available for C&D wastes and general refuse collection.

5.4.2      As advised by the Contractor, Total 1,862 m3 of inert C&D material was generated, 302 m3 were disposed of as public fill, 1,397 m3 were reused in other projects and 163 m3 were reused in the Contract in the reporting month. 82,250 kg general refuse was generated and sent to NENT Landfill in the reporting month. 60,330 kg of metals, no plastics and paper/cardboard packaging were collected by recycle contractor in the reporting month. No chemical waste was collected by licensed contractor in the reporting period. 2,401 m3 of Type 1, 3,835 m3 of Type 2 and no Type 3 Marine sediment were disposed at Confined Marine Disposal Facility to the East of Sha Chau. The waste flow table is annexed in Appendix M.

5.4.3      The Contractor is advised to properly maintain on site C&D materials and wastes collection, sorting and recording system and maximize reuse / recycle of C&D materials and wastes. The Contractor is reminded to properly maintain the site tidiness and dispose of the wastes accumulated on site regularly and properly.

5.4.4      The Contractor is reminded that chemical waste containers should be properly treated and stored temporarily in designated chemical waste storage area on site in accordance with the Code of Practise on the Packaging, Labelling and Storage of Chemical Wastes.

5.5          Landscape and Visual

5.5.1      Bi-weekly inspection of the implementation of landscape and visual mitigation measures was conducted on 7 and 21 October 2020. A summary of the site inspection is provided in Appendix C. The observations and recommendations made during the site inspections are presented in Table 6.1.