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                          Landscape and Visual 16

4.......... Implementation Status of Environmental Mitigation Measures. 17

5.......... Monitoring Results. 18

5.1                          Construction Dust Monitoring. 18

5.2                          Regular Construction Noise Monitoring. 18

5.3                          Waste Management 19

5.4                          Landscape and Visual 19

6.......... ENVIRONMENTAL SITE INSPECTION AND AUDIT.. 20

7.......... Environmental Non-conformance.. 21

7.1                          Summary of Monitoring Exceedances. 21

7.2                          Summary of Environmental Non-Compliance. 21

7.3                          Summary of Environmental Complaints. 21

7.4                          Summary of Environmental Summon and Successful Prosecutions. 21

8.......... FUTURE KEY ISSUES. 22

8.1                          Construction Programme for the Next Three Months. 22

8.2                          Key Issues for the Coming Month. 22

8.3                          Monitoring Schedule for the Coming Month. 22

9.......... ConclusionS AND RECOMMENDATIONS. 23

9.1                          Conclusions. 23

9.2                          Recommendations. 23

 

 

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 4.1........... Status of Required Submission under Environmental Permit 17

Table 5.1 ......... Summary of 24-hour TSP Monitoring Result in the Reporting Period. 18

Table 5.2 ......... Summary of 1-hour TSP Monitoring Result in the Reporting Period. 18

Table 5.3 ......... Summary of Construction Noise Monitoring Results in the Reporting Period. 18

Table 6.1 ......... Observations and Recommendations of Site Audit 20

Table 8.1........... Construction Activities in the coming three months. 22

 

 

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

 

 

 

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

Appendix J

Event and Action Plan

Cumulative Statistics on Complaints, Notification of Summons and Successful Prosecutions

Appendix K

Appendix L

Monthly Summary Waste Flow Table

Shatin to Central Link (Hung Hom – Admiralty Section) Kai Tak Barging Facility under FEP-01/436/2012/F Monthly EM&A Report for July 2021

 

 

 

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 and noise monitoring.

 

This is the fortieth monthly EM&A Report presenting the EM&A works carried out during the period between 1 and 31 July 2021. As informed by the Contractor, major activities in the reporting period were:

 

Locations

Site Activities

Kai Tak

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

·         Backfilling at Underpass and depressed road;

·         Removal of ELS at cut & cover, underpass and depressed road;

·         Dismantle of working platform.

Ma Tau Kok

·         TTM implementation;

·         Trial trench for piling works;

·         Pre-grouting works for pipe piling works for MTK C&C Tunnel;

·         Pipe piling works for MTK C&C tunnel;

·         Temporary storm dain diversion works.

Kowloon Bay

·         Waterproofing application at Stage 1 UWT;

·         Backfilling and ELS Removal at Stage 1 UWT;

·         Pipe Piling works for Stage 2 UWT.

 

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

Regular Noise Monitoring
No exceedance of Action and Limit Level of noise was recorded in the reporting month.

Complaint, Notification of Summons and Successful Prosecution

No environmental related complaints, 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

·         Wall and 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;

·         Pre-grouting works for pipe piling works of MTK C&C Tunnel;

·         Pipe piling works for cut and cover tunnel;

·         Temporary storm drain diversion works.

Kowloon Bay

·         Backfilling and ELS removal works at Stage 1 UWT;

·         Waterproofing application at Stage 1 UWT;

·         Seawall Reinstatement at Stage 1 UWT;

·         Pipe piling and other preparation works for Stage 2 UWT.

 

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 fortieth monthly EM&A Report which summaries the impact monitoring results and audit findings for the Project during the reporting period between 1 and 31 July 2021.

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/D) was issued by the Director of Environmental Protection (DEP) on 15 June 2021. 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

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

·         Backfilling at Underpass and depressed road;

·         Removal of ELS at cut & cover, underpass and depressed road;

·         Dismantle of working platform.

Ma Tau Kok

·         TTM implementation;

·         Trial trench for piling works;

·         Pre-grouting works for pipe piling works for MTK C&C Tunnel;

·         Pipe piling works for MTK C&C tunnel;

·         Temporary storm dain diversion works.

Kowloon Bay

·         Waterproofing application at Stage 1 UWT;

·         Backfilling and ELS Removal at Stage 1 UWT;

·         Pipe Piling works for Stage 2 UWT.

 

 

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

WT00030330-2018

27 Apr 2018

30 Apr 2023

Valid

Kowloon Bay

Construction Noise Permit

GW-RE0355-21

4 May 2021

3 Aug 2021

Valid

General Works at Ma Tau Kok

GW-RE0012-21

20 Jan 2021

10 Jul 2021

Valid until

10 Jul 2021

General Works at Kai Tak

GW-RE0658-21

11 Jul 2021

10 Jan 2022

Valid on

11 Jul 2021

GW-RE0474-21

21 May 2021

20 Nov 2021

Valid

ELS Removal at Stage 1 UWT

PP-RE0018-21

3 Jun 2021

2 Aug 2021

Valid

Percussive Piling at Stage 2 Underwater Tunnel

GW-RE0259-21

1 Apr 2021

30 Sep 2021

Valid

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

--

--

--

--

--

Billing Account for Construction Waste Disposal

7029909

22 Jan 2018

End of Project

Account Active

--

7031949

27 May 2021

26 Aug 2021

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 July 2021 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 & 2238)

Acoustic Calibrator

Rion (Model No. NC-74) & B&K (Model No. 4231)

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 July 2021 is provided in Appendix F.

 

3.3          Landscape and Visual

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

Monthly EM&A Report for June 2021

14 July 2021

 

 

 

 

 

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

26.6

21.7 – 36.9

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

56.3

50.0 – 64.2

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 I.

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

65.7 – 68.9

75

E-N21a

66.6 – 71.3

75

 

5.2.2      No Action and Limit Level exceedance for noise was recorded at all monitoring stations in the reporting month.

5.2.3      The event and action plan is annexed in Appendix I.

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

 

 

 

 

5.3          Waste Management

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

5.3.2      As advised by the Contractor, total 9,676 m3 of inert C&D material were generated and 236 m3 disposed of as public fill, 9,440 m3 of inert C&D was reused in the Contract and no other projects respectively in the reporting month. 158,440 kg general refuse was generated and sent to NENT Landfill in the reporting month. 333,690 kg of metal, 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 month. No Type 1, Type 2 and 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 K.

5.3.3      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.

5.3.4      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.

5.4          Landscape and Visual

5.4.1      Bi-weekly inspection of the implementation of landscape and visual mitigation measures was conducted on 14 and 28 July 2021. 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.

 

6              ENVIRONMENTAL SITE INSPECTION AND AUDIT

6.1.1      Site inspections were carried out on a weekly basis to monitor the implementation of proper environmental pollution control and mitigation measures for the Project. A summary of the mitigation measures implementation schedule is provided in Appendix C.

6.1.2      In the reporting month, 4 site inspections were carried out on 7, 14, 21 and 28 July 2021. Joint inspections with the IEC, ER, the Contractor and ET were conducted on 21 July 2021. No non-compliance was recorded during the site inspection. Details of observations recorded during the site inspections are presented in Table 6.1.

Table 6.1         Observations and Recommendations of Site Audit

Parameters

Date

Observations and Recommendations

Follow-up

Air Quality

Nil

·   Nil

Nil

Noise

21 Jul 2021

Reminder:

·   The Contractor was reminded to erect the noise barrier properly on the generator for noise screening at Ma Tau Kok.

The item was rectified by the Contractor on 28 Jul 2021.

28 Jul 2021

Reminder:

·   The Contractor was reminded to enclose the noise barrier properly on drilling machine at Ma Tau Kok.

The item was rectified by the Contractor on 4 Aug 2021.

Water Quality

7 Jul 2021

·   High pH value was observed at AquaSed in Ma Tau Kok. The Contractor should adjust the pH value as required in discharge license.

The item was rectified by the Contractor on 14 Jul 2021.

Waste/ Chemical Management

7 Jul 2021

·   Oil drums were observed stored without a drip tray at the Steel Platform of Stage 2 UWT. The Contractor should provide a drip tray for oil drums to prevent accidental spillage.  

The item was rectified by the Contractor on 14 Jul 2021.

14 Jul 2021

Reminder:

·   The Contractor was reminded to plug the drip tray at Steel Platform of Stage 2 UWT.

The item was rectified by the Contractor on 21 Jul 2021.

21 Jul 2021

·   Chemical containers were observed stored without drip tray at Kai Tak. The Contractor should provide proper handling for chemical storage.

The item was rectified by the Contractor on 28 Jul 2021.

28 Jul 2021

·   Chemical containers placed without drip tray were observed at Marine Platform of Stage 2. The Contractor was advised to provide drip tray to the chemical containers stored onsite.

The item was rectified by the Contractor on 4 Aug 2021.

Landscape

& Visual

Nil

Nil

Nil

Permits/

Licenses

Nil

Nil

Nil

 

6.1.3      All follow-up actions requested by Contractor's ET during the site inspection were undertaken as reported by the Contractor and confirmed in the following weekly site inspection conducted during the reporting period.


 

7              Environmental Non-conformance

7.1          Summary of Monitoring Exceedances

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

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

7.1.3      No Action and Limit Level exceedance for noise was recorded at all monitoring stations in the reporting month.

7.1.4      No Limit Level exceedance for noise was recorded at all monitoring stations in the reporting month.

7.2          Summary of Environmental Non-Compliance

7.2.1      No environmental non-compliance was recorded in the reporting month.

7.3          Summary of Environmental Complaints

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

7.4          Summary of Environmental Summon and Successful Prosecutions

7.4.1      No environmental related prosecution or notification of summons was received in the reporting month. Cumulative statistics on notification of summons and successful prosecutions is provided in Appendix J.

 

8              FUTURE KEY ISSUES

8.1          Construction Programme for the Next Three Months

8.1.1      The major construction works between August and October 2021 are provided in Table 8.1.

Table 8.1          Construction Activities in the coming three months

Locations

Site Activities

Kai Tak

·         Wall and 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;

·         Pre-grouting works for pipe piling works of MTK C&C Tunnel

·         Pipe piling works for cut and cover tunnel;

·         Temporary storm drain diversion works.

Kowloon Bay

·         Backfilling and ELS removal works at Stage 1 UWT;

·         Waterproofing application at Stage 1 UWT;

·         Seawall Reinstatement at Stage 1 UWT;

·         Pipe piling and other preparation works for Stage 2 UWT.

 

8.2          Key Issues for the Coming Month

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

8.3          Monitoring Schedule for the Coming Month

8.3.1      The tentative schedule for environmental monitoring in August 2021 is provided in Appendix F.

9              ConclusionS AND RECOMMENDATIONS

9.1          Conclusions

9.1.1      1-hour TSP, 24-hour TSP and noise monitoring were carried out in the reporting month.

9.1.2      All 24-hour TSP monitoring results complied with the Action / Limit Level at in the reporting month.

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

9.1.4      No Action and Limit Level exceedance for noise was recorded at all monitoring stations in the reporting month.

9.1.5      4 nos. of environmental site inspections were carried out in July 2021. Recommendations on remedial actions were given by ET and IEC to the Contractor for the deficiencies identified during the site audit.

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

9.2          Recommendations

9.2.1      According to the environmental site inspections performed in the reporting month, the following recommendations were provided: -

Air Quality Impact

·      No specific observation was identified in the reporting month.

Construction Noise Impact

·      The Contractor was reminded to erect the noise barrier properly on the generator for noise screening.

Water Quality Impact

·      The Contractor should adjust the pH value as required in discharge license.

Chemical and Waste Management

·      The Contractor was advised to provide drip trays to the chemical containers stored onsite for preventing accidental leakage.

Landscape & Visual Impact

·      No specific observation was identified in the reporting month.

Permits/licenses

·      No specific observation was identified in the reporting month.