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

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 audit 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 60^th monthly EM&A Report presenting the EM&A works carried out during the period between 1 and 31 March 2023. As informed by the Contractor, major activities in the reporting period were:

Locations	Site Activities
Kai Tak	- Road pavement at underpass, depressed road and C&C; - Tunnel wall and walkway construction at At-grade Road; - Stitch joint construction at ventilation adit, underpass, depressed road and C&C Tunnel; - Waterproofing at Underpass Roof.
Ma Tau Kok	- Temporary traffic management (TTM) implementation; - Excavation at MTK C&C Tunnel; - Decking and Excavation and Lateral Support (ELS) installation at MTK C&C Tunnel.
Kowloon Bay	- Road pavement at Stage 1 UWT; - Modular strutting installation at Stage 2 UWT; - Excavation at Stage 2 UWT; - Base slab construction at 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

One (1) action level exceedance was recorded regarding to complaint on noise nuisance received in the reporting month. No limit level exceedance was recorded at all monitoring stations in the reporting month.

Complaint, Notification of Summons and Successful Prosecution

Six (6) complaints were received in the reporting month (March 2023) and the investigation was provided in the current reporting month (March 2023).

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	- Road Pavement at underpass, depressed road and C&C; - Stitch joint construction at underpass, depressed road and C&C Tunnel; - Walkway construction at At-grade road; - Waterproofing at Underpass Roof.
Ma Tau Kok	- TTM implementation; - Excavation at MTK C&C Tunnel; - Decking and ELS installation at MTK C&C Tunnel; - Base slab construction at MTK C&C Tunnel.
Kowloon Bay	- Road pavement at Stage 1 UWT; - Modular strutting installation at Stage 2 UWT - Excavation at Stage 2 UWT; - Base slab construction at 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 60^th monthly EM&A Report which summaries the impact monitoring results and audit findings for the Project during the reporting period between 1 and 31 March 2023.

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	- Road pavement at underpass, depressed road and C&C; - Tunnel wall and walkway construction at At-grade Road; - Stitch joint construction at ventilation adit, underpass, depressed road and C&C Tunnel; - Waterproofing at Underpass Roof.
Ma Tau Kok	- Temporary traffic management (TTM) implementation; - Excavation at MTK C&C Tunnel; - Decking and Excavation and Lateral Support (ELS) installation at MTK C&C Tunnel.
Kowloon Bay	- Road pavement at Stage 1 UWT; - Modular strutting installation at Stage 2 UWT; - Excavation at Stage 2 UWT; - Base slab construction at 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. Patrick Lo	36195901	2268 3954
ERM	Independent Environmental Checker (IEC)	Independent Environmental Checker	Ms. Mandy To	2271 3113	3015 8052
Gammon	Contractor	Contracts Manager	Mr. Kin Fai Tam	2516 8823	2516 6260
Gammon	Contractor	Environmental Manager	Ms. Michelle Tang	9267 8866	2516 6260
AECOM	Contractor’s Environmental Team (ET)	ET Leader	Mr. Y. W. Fung	3922 9366	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
Permit / License No. / Notification/ Reference No.	From	To	Status	Remarks
*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-RE0032-23	31 Jan 2023	30 Mar 2023	Superseded by GW-RE0248-23	General Works at Ma Tau Kok
GW-RE0248-23	31 Mar 2023	30 Jun 2023	Valid	General Works at Ma Tau Kok
GW-RE1237-22	28 Nov 2022	19 May 2023	Valid	General Works at Kai Tak
GW-RE1335-22	21 Dec 2022	20 Jun 2023	Valid	General Works at Stage 1 Underwater Tunnel
GW-RE1101-22	17 Oct 2022	16 Apr 2023	Valid	General Works at Stage 2 Underwater Tunnel
GW-RE0018-23	3 Feb 2023	2 Aug 2023	Valid	General Works at KT Barging Facility (KTW)
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/23-046	21-Nov-2022	28-Feb-2023	Valid	Sediments requiring Type 1 - Open Sea Disposal
EP/MD/23-097	12 Feb 2023	11 Mar 2023	Superseded by EP/MD/23-102	Sediments requiring Type 1 (Dedicated Site) and Type 2 Confined Marine Disposal
EP/MD/23-102	12 Mar 2023	11 Apr 2023	Valid
*Billing Account for Construction Waste Disposal*
7029909	22 Jan 2018	End of Project	Account Active	--
7031949 (CEDD01187)	1 Mar 2023	28 May 2023	Account Active	Billing Account for Disposal of Construction Waste (by vessels)
7031949 (CEDD01193)	20 Mar 2023	28 May 2023	Account Active
*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.

(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 High Volume Samplers. 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 March 2023 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. L_eq, 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, 2250L& 2270)
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. L_eq, 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: L_eq_(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 L_eq, 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.

Monitoring Schedule for the Reporting Month

3.2.7 The schedule for environmental monitoring in March 2023 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/D and Condition 3.4 of FEP-01/457/2013/C	Monthly EM&A Report for February 2023	14 March 2023

EP Condition

Submission

Submission Date

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

Monthly EM&A Report for

February 2023

14 March 2023

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	64.0	30.5 - 116.5	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	62.2	58.5 – 66.2	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 are 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), L_eq_{(30 mins)}	Limit Level, dB(A), L_eq_{(30 mins)}
E-N12a	69.5 – 69.6	75
E-N21a	61.2 – 62.6	75

5.2.2 One (1) action level exceedance was recorded regarding to complaint on noise nuisance received in the reporting month. No limit level exceedance was recorded at all monitoring stations in the reporting month.

5.2.3 The event and action plan are 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 49,565 m³of inert C&D material were generatedand 49,565 m³of C&D material was disposed to public fill, no inert C&D was reused in the Contract and no other projects respectively in the reporting month. 85,500 kgof general refuse was generated and sent to NENT Landfill in the reporting month. No metal, 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, 7,931 m³of 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 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 Practice 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 8 and 22 March 2023. 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, 5 site inspections were carried out on 1, 8, 15, 22 and 29 March 2023. Joint inspections with the IEC, ER, the Contractor and ET were conducted on 22 March 2023. 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	1 Mar 2023	Reminder · The contractor was reminded to watering at tunnel entrance regularly.	The item was rectified by the Contractor on 9 March 2023.
	1 Mar 2023	Observation · The opened cement packing was observed exposing to ambient in underpass & C&C tunnel. The contractor was advised to ensure the cement packing should be covered to prevent dust pollution.	The item was rectified by the Contractor on 9 March 2023.
	15 Mar 2023	Observation · The dust arising was observed when vehicles accessed at de-pressed road. The contractor was advised to ensure to provide watering regurlarly.	The item was rectified by the Contractor on 22 March 2023.
Noise	8 Mar 2023	Observation · The excavator and crane were observed missing acoutic sheets.at MTK. The contractor was advised to ensure the acoustic sheets should be covered on the PMES to reduce noise.	The item was rectified by the Contractor on 17 March 2023.
Water Quality	22 Mar 2023	Observation · The silt was observed at the edge of the Stage 2 Marine Platform, and the toe board was not enclosed. The contractor was advised to ensure the silt should be remove regularly, and repair the toe board to prevent anything accidential falling cause marine pollution.	The item was rectified by the Contractor on 3 April 2023.
Water Quality	22 Mar 2023	Observation The silt curtain was observed not enclosed at Stage 2 Marine Platform. The contractor was advised to ensure the silt curtain should be fulkly enclosed and well maintain strictly implemanted.	The item was rectified by the Contractor on 3 April 2023.
Waste/ Chemical Management	1 Mar 2023	Reminder · The domestic and construction waste were found disposing at the same trash can at depressed road. The contractor was advised to ensure difference types of waste should be disposing to difference trash cans to fullfil related regulations.	The item was rectified by the Contractor on 9 March 2023.
	1 Mar 2023	Observation · The chemical containers were observed placing on the ground in C&C tunnel. The contractor was advised to ensure the chemical containers should be placing into the drip tray to prevent accidental leakage.	The item was rectified by the Contractor on 9 March 2023.
	8 Mar 2023	Reminder · The general refuses was observed disposed without containers. The contractor was advised to ensure should be disposing in the rubbish container with cover.	The item was rectified by the Contractor on 17 March 2023.
	8 Mar 2023	Observation · The chemical containers were observed placing on the ground in Underwater tunnel and Marine platform stage 2. The contractor was advised to ensure the chemical containers should be placing into the drip tray to prevent accidental leakage.	The item was rectified by the Contractor on 17 March 2023.
	15 Mar 2023	Observation · The chemical containers was observed placing at the non-properd area. The contractor was advised to ensure the chemical containers should be remove, and placing at the propered area.	The item was rectified by the Contractor on 22 March 2023.
	29 Mar 2023	Observation · The general refuse was observed not contained with any container at stockpile. The contractor was advised to ensure the container should be provided for deposing.	The item was rectified by the Contractor on 3 April 2023.
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 One (1) action level exceedance was recorded regarding to complaints on noise nuisance received in the reporting month. No limit level exceedance 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 Six (6) complaints were received in the reporting month (March 2023) and the investigation were provided in the current reporting month (March 2023). Cumulative statistics on environmental complaint is provided in Appendix J.

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 April 2023 to June 2023 are provided in Table 8.1.

Table 8.1 Construction Activities in the coming three months

Locations	Site Activities
Kai Tak	- Road Pavement at underpass, depressed road and C&C; - Stitch joint construction at underpass, depressed road and C&C Tunnel; - Walkway construction at At-grade road; - Waterproofing at Underpass Roof.
Ma Tau Kok	- TTM implementation; - Excavation at MTK C&C Tunnel; - Decking and ELS installation at MTK C&C Tunnel; - Base slab construction at MTK C&C Tunnel.
Kowloon Bay	- Road pavement at Stage 1 UWT; - Modular strutting installation at Stage 2 UWT - Excavation at Stage 2 UWT; - Base slab construction at 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 April 2023 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 One (1) action level exceedance was recorded regarding to complaints on noise nuisance received in the reporting month. No limit level exceedance was recorded at all monitoring stations in the reporting month.

9.1.5 5 nos. of environmental site inspections were carried out in January 2023. Recommendations on remedial actions were given by ET and IEC to the Contractor for the deficiencies identified during the site audit.

9.1.6 Six (6) complaints were received in the reporting month (March 2023) and the investigation was provided in the current reporting month (March 2023).

9.1.7 No environmental related 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

· The contractor was reminded to watering regularly.

· The contractor was advised to ensure the cement packing should be covered to prevent dust pollution.

Construction Noise Impact

· The contractor was advised to ensure the acoustic sheets should be covered on the PMES to reduce noise.

Water Quality Impact

· The contractor was advised to ensure the silt should be remove regularly, and repair the toe board to prevent anything accidential falling cause marine pollution.