Aurecon Hong Kong Limited (Aurecon) was appointed to undertake the role of Environmental Team (ET) and carry out Environmental Monitoring and Audit for the North East New Territories (NENT) Landfill Extension.

The construction phase and EM&A programme of the Project commenced on 1 December 2022.

This 1^st Monthly EM&A Report presents the EM&A works conducted from 1 December 2022 to 31 December 2022 in accordance with the EM&A Manual.

Summary of Construction Works undertaken during Report Period

The major construction works undertaken during the reporting period include:

- Material loading and unloading, site traffic

- Site clearance

- Installation of permanent fencing

- Site formation

- Tree felling

Environmental Monitoring and Audit Progress

A summary of the monitoring activities in this reporting period is listed below:

Items	Times	Date
- Air Quality Monitoring during normal weekdays at each monitoring station	5 times	5, 10, 16, 22 & 28 December 2022
- Construction Noise Monitoring during normal weekdays at each monitoring station	4 times	6, 16, 22 & 28 December 2022
- Surface Water Quality Monitoring during normal weekdays at each monitoring station	1 time	5 December 2022
- Landfill Gas Monitoring during normal weekdays for Construction Works	24 times	1 to 6, 8 to 10, 12 to 17, 19 to 24, 28 to 31 December 2022
- Post-translocation Monitoring during normal weekdays at recipient site	1 time	29 December 2022
- Post-transplantation monitoring and audit during normal weekdays for transplanted plants and receptor sites	2 time	9 & 21 December 2022
- Joint Environmental Site Inspection	4 times	5, 12, 19 & 28 December 2022

Environmental Exceedance/Non-conformance/Compliant/Summons and Prosecution

No exceedance of the Action and Limit Levels was recorded at designated monitoring stations during the reporting period.

No non-compliance event and complaint were recorded during the reporting period.

No summons/prosecutions were received in this reporting period.

One complaint on 20 December 2022 was received by the public relations officer of the Contractor the reporting period. There is no direct evidence showing that the complaint is likely related to NENTX project.

Reporting Change

There was no reporting change in the reporting period.

Future Key Issues

Works to be undertaken in the next month include:

- Material loading and unloading, site traffic

- Permanent site office foundation works with pouring of concrete

- Site clearance

- Installation of permanent fencing

- Site formation

- Tree felling

Potential environmental impacts arising from the above construction activities are mainly associated with air quality, construction noise, water quality, waste management, landfill gas monitoring, landscape and visual, cultural heritage and ecology.

1. Introduction

1.1. Background

1.1.1. The North East New Territories Landfill Extension (the NENTX Project) is located adjacent to the existing North East New Territories (NENT) Landfill at Ta Kwu Ling. The extension site is located in a valley covering mainly the existing NENT Landfill Stockpile and Borrow Area that was formed to the east of the existing landfill as part of the original site development of the landfill, and layout plan shown in Figure 1.

1.1.2. The NENTX is a designated project. The Environmental Impact Assessment (EIA) Report (AEIAR-111/2007) and an Environmental Monitoring and Audit Manual were approved on 20 September 2007. The project is governed by an Environmental Permit (EP) (EP-292/2007) which was granted on 26 November 2007. A further of EP (FEP) was applied and the FEP (FEP-01/292/2007) was subsequently granted on 28 April 2022.

1.1.3. In accordance with the requirements specified in Section 2.6 to 2.10 and Section 12.3 of the approved Environmental Monitoring and Audit (EM&A) Manual and Environmental Permit (EP and FEP) condition 3.3, Monthly EM&A report should be submitted to the Director of Environmental Protection (DEP), within 2 weeks after the end of the reporting month. The submissions shall be certified by the Environmental Team (ET) Leader and verified by the Independent Environmental Checker (IEC).

1.1.4. The construction phase and EM&A programme of the Project commenced on 1 December 2022.

1.2. Nature, Scale and Scope of the captioned Designated Project

1.2.1 The Nature, Scale and Scope of the captioned Designated Project is presented in Table 1-1.

Table 1-1 Nature, Scale and Scope of the captioned Designated Project

Item(s)

Content

Nature of Designated Project

Construction and operation of a landfill for waste as defined in the “Waste Disposal Ordinance” (Cap. 354)

Scale and Scope of Designated Project

The Project mainly consists of the followings: -

Construction and operation of a landfill extension of about 70 hectares with a target void space of at least 19 million cubic metres on the eastern side of the existing NENT Landfill, including the followings: -

i. Site formation and preparation;

ii. Installation of liner system;

iii. Installation of leachate collection, treatment and disposal facilities;

iv. Installation of gas collection, utilization and management facilities;

v. Utilities provisions and drainage diversion;

vi. Landfilling operation;

vii. Restoration and aftercare in subsequent stages; and

viii. Measures to mitigate environmental impacts as well as environmental monitoring and auditing to be implemented.

1.3. Purpose of this Report

1.3.1. This is the 1^st Monthly EM&A Report which summarises the impact monitoring results and audit findings for the EM&A programme during the reporting period from 01 December 2022 to 31 December 2022.

1.4. Structure of the Report

1.4.1. The structure of the report is as follows:

Section 1 – Introduction

- details the background, purpose and structure of the report.

Section 2 – Project Information

- summarises background and scope of the Project, site description, project organization and contact details, construction programme, the construction works undertaken and the status of Environmental Permit(s)/License(s) during the reporting period.

Section 3 – Air Quality Monitoring

- Construction Dust

Section 4 – Noise Monitoring

Section 5 – Water Quality Monitoring

- Groundwater Monitoring

- Surface Water Monitoring

Section 6 – Waste Management

Section 7 – Landfill Gas Monitoring

Section 8 – Landscape and Visual

Section 9 – Cultural Heritage

Section 10 – Ecological Monitoring

Section 11 – Site Inspection and Audit

Section 12 – Environmental Non-Conformance

Section 13 – Implementation Status on Environmental Mitigation Measures

Section 14 – Future Key Issues

2. Project Information

2.1. Construction Activities

2.1.1. A summary of the major construction activities undertaken in this reporting period is shown in Table 2-1. Construction programme is illustrated in Appendix A. Detailed construction activities and the construction layout plan are summarized in Appendix L.

Table 2-1 Major Construction Activities Undertaken in the Reporting Period

Construction Activities Undertaken

- Material loading and unloading, site traffic

- Site clearance

- Site formation

- Tree felling

2.2. Project Organization & Management Structure

2.2.1. The Project Organization Chart & Management Structure are shown in Appendix B. The key personnel contact information is summarized in Table 2-2.

Table 2-2 Contact Information of Key Personnel

Party	Name	Contact Number
Contractor (Veolia Environmental Service Hong Kong Holding Ltd.)	Mr. William Wan	2902 5296
Independent Environmental Checker (IEC) (Meinhardt Infrastructure and Environment Ltd.)	Ms. Claudine Lee	2859 5409
Environmental Team Leader (ET) (Aurecon Hong Kong Limited)	Mr. Fredrick Leong	3664 6888

2.3. Status of Submission required under the FEP & EP

2.3.1. The status of statutory environmental compliance with the EP conditions under the EIAO, submission status under the FEP & EP are presented in Table 2-3. The detail status of statutory environmental compliance with the EP conditions under the EIAO, submission status under the FEP & EP for NENTX project are shown in Appendix P.

Table 2-3 Status of Submissions required under the FEP & EP

FEP Condition	EP Condition	Submission / Measures	Status
2.1	2.3	Management Organization of Main Construction Companies	Submission Date (12 Oct 2022)
2.2	2.4	Setting up of Community Liaison Group	Submission Date (12 Oct 2022)
2.3	2.5	Submission of EM&A Manual	Submission Date (12 Oct 2022)
2.5	2.7	Submission of Vegetation Survey (Transplantation Proposal)	Submission Date (2 September 2022)
2.6	2.8	Submission of translocation proposal	Submission Date (8 July 2022)
2.7	2.9	Submission of Transplantation Report	Submission Date (19 Jan 2023) 2^nd transplantation monitoring (9 Dec 2022) 3^rd transplantation monitoring (21 Dec 2022)
2.8	2.10	Translocation and translocation monitoring	Translocation was carried out in July 2022 Submission Date (27 December 2022) 5^th translocation monitoring (29 Dec 2022)
2.9	2.11	Submission of Detailed Landfill Gas Hazard Assessment Report	Submission Date (6 Oct 2022)
2.10	2.12	Submission of Waste Management Plan	Submission Date (30 December 2022)
3.2	3.2	Submission of Baseline Monitoring Report	Submission Date (30 Nov 2022)

2.4. Status of Environmental Approval Document

2.4.1. A summary of the relevant valid permits, licences, and/or notifications on environmental protection for this Project since the granting of the EP is presented in Table 2-4.

Table 2-4 Summary of the relevant valid permits, licences, and/or notifications on environmental protection

Permit / Licenses / Notification	Reference	Expiry Date	Remark
Environmental Permit (EP)	EP-292/2007	Throughout the Contract	Permit granted on 26 November 2007
Further Environmental Permit (FEP)	FEP-210/2022	Throughout the Contract	Permit granted on 28 April 2022
Notification of Construction Works as required under Air Pollution Control (Construction Dust) Regulation	479809	Throughout the Contract	Approved on 13 May 2022
Registration of Waste Producer under Waste Disposal Ordinance	7043692	Throughout the Contract	Approved on 13 April 2022
Registration as Chemical Waste Producer	5213-642-P1034-18	Throughout the Contract	Approved on 11 July 2022
Construction Noise Permit	GW-RN1151-22	28 February 2023	Approved on 29 November 2022
Effluent Discharge License under Water Pollution Control Ordinance	WT00042301-2022	31 October 2027	Approved on 18 October 2022

2.5. Environmental Monitoring and Audit Progress

2.5.1. A summary of the monitoring activities in this reporting period is presented in Table 2-5.

Table 2-5 Summary of the Monitoring Activities in this reporting period

Items	Times	Date
- Air Quality Monitoring during normal weekdays at each monitoring station	5 times	5, 10, 16, 22 & 28 December 2022
- Construction Noise Monitoring during normal weekdays at each monitoring station	4 times	6, 16, 22 & 28 December 2022
- Surface Water Quality Monitoring during normal weekdays at each monitoring station	1 time	5 December 2022
- Landfill Gas Monitoring during normal weekdays for Construction Works	24 times	1 to 6, 8 to 10, 12 to 17, 19 to 24, 28 to 31 December 2022
- Post-translocation Monitoring during normal weekdays at recipient site	1 time	29 December 2022
- Post-transplantation monitoring and audit during normal weekdays for transplanted plants and receptor sites	2 time	9 & 21 December 2022
- Joint Environmental Site Inspection	4 times	5, 12, 19 & 28 December 2022

Air Quality

5 sets of 1-hr TSP & 24-hr TSP construction dust measurement were carried out at each monitoring stations during normal weekdays of the reporting period. No exceedance of Action and Limit Levels of construction dust was recorded during the reporting period.

Noise

4 sets of 30-minute construction noise measurement were carried out at each monitoring stations during normal weekdays of the reporting period. No exceedance of Action and Limit Levels of construction noise was recorded during the reporting period.

Groundwater

Site clearance of future landfilling area is in progress. The installation of groundwater monitoring boreholes will be installed after the site formation work of the landfilling area. The target commencement period of groundwater monitoring will be in 2026.

Surface Water Quality

1 set of surface water quality measurement were carried out at each monitoring stations during normal weekdays of the reporting period. No exceedance of Action and Limit Levels of surface water quality was recorded during the reporting period.

Landfill Gas

24 sets of landfill gas measurement were carried out at a designated monitoring location during normal weekdays of the reporting period. No exceedance of Action and Limit Levels of landfill gas was recorded during the reporting period.

Landscape and Visual

All the specified and affected LCAs, LRs and VSRs have been monitored during the reporting period. No exceedance of Action and Limit Levels of landscape and visual was recorded during the reporting period.

Cultural Heritage

Implementation of the mitigation measures during construction phase of the Project has been monitored through the regular site inspection/audit.

Ecology

1 set of post-translocation monitoring at recipient site and 2 sets of post-transplantation monitoring and audit for transplanted plants and receptor sites during normal weekdays of the reporting period were carried out. Implementation of the mitigation measures during construction phase of the Project has been monitored through the regular site inspection/audit.

Environmental Site Inspection

ET weekly environmental site inspections were carried out on 05, 12, 19 & 28 December 2022. A joint environmental site inspection was carried out by the representatives of the Employer's Representative (ER), the Contractor, IEC and the ET on 19 December 2022. The Contractor has generally implemented the mitigation measures as recommended.

3. Air Quality Monitoring

3.1 Construction Dust

3.1.1 Monitoring Requirement

3.1.1.1 In accordance with the EM&A Manual, 1-hr & 24-hr Total Suspended Particulates (TSP) levels should be measured at the designated air quality monitoring stations in every 6 days to ensure that any deteriorating air quality could be readily detected, and timely action shall be undertaken to rectify such situation. For 1-hr TSP monitoring, the sampling frequency of at least three times in every six-days should be undertaken when the highest dust impact occurs. The specific time to start and stop the 24- hr TSP monitoring shall be clearly defined for each location.

3.1.2 Monitoring Parameters, Frequency and Location

3.1.2.1 According to the EM&A Manual, three monitoring stations namely AM(D)1, AM(D)2 and AM(D)3 are selected for the impact monitoring.

3.1.2.2 A baseline monitoring plan has been submitted to IEC and EPD on 31 May 2022 including the proposal with justification of change of monitoring locations. Due to limited access to the original monitoring locations at AM(D)1, AM(D)2 and AM(D)3, the adjusted stations at AM1, AM2 and AM3 were agreed with IEC prior to the baseline and impact monitoring. The locations of adjusted dust monitoring locations are shown in Figure 2.

3.1.2.3 The detailed monitoring schedule is shown in Appendix C. The locations of dust monitoring stations are shown in Table 3-1. The monitoring parameters, frequency and duration are shown in Table 3-2.

Table 3-1 Locations of Dust Monitoring Stations

Monitoring Station	Representative for	Monitoring Parameters
Monitoring Station	Representative for	Monitoring Parameters
AM1	Tung Lo Hang	1-hr and 24-hr TSP
AM2	Heung Yuen Wai	1-hr and 24-hr TSP
AM3	Wo Keng Shan Tsuen	1-hr and 24-hr TSP

Remarks:

The contractor passed correspondence including original monitoring locations specified on the existing EM&A Manual to the village representatives on 26 April 2022. After a meeting with Ta Kwu Ling District Rural Committee (RC) Chairman, representative from the RC and a few villagers on 1 May 2022, all the Village Heads of Wo Keng Shan Tsuen, Heung Yuen Wai and Lin Ma Hang verbally refused to accept our proposal for installation of dust and / or noise monitoring equipment within or next to their villages, for the baseline & impact monitoring.

AM(D)1 Tung Lo Hang, AM(D)2 Heung Yuen Wai, AM(D)3 Wo Keng Shan Tsuen are the air monitoring stations for the construction phase EM&A programme as identified in the approved EM&A Manual for the Project. The access to Tung Lo Hang, Heung Yuen Wai and Wo Keng Shan Tsuen were denied. A search for alternative air monitoring locations (AM1, AM2 & AM3) was carried out during the site visit.

Due to the adjustment of the location of AM(D)1, AM(D)2 & AM(D)3to AM1, AM2 & AM3, the measured air quality levels at AM1, AM2 & AM3 would represent the air quality levels at AM(D)1, AM(D)2 & AM(D)3.

Table 3-2 Dust Impact Monitoring Parameters, Frequency and Duration

Monitoring Station	Parameter	Frequency and Duration
AM1, AM2, AM3	1-hr TSP	At least 3 times per 6 days
AM1, AM2, AM3	24-hr TSP	1 time per 6 days

3.1.3 Monitoring Equipment

3.1.3.1 High volume samplers (HVSs) were used for carrying out 24-hr TSP monitoring. For 1-hr TSP monitoring, direct reading dust meters were used to measure 1-hr TSP levels.

3.1.3.2 Table 3-3 summarises the equipment that were used in the dust monitoring programme. The calibration certificates are shown in Appendix D.

Table 3-3 Dust Monitoring Equipment

Equipment	Model	Monitoring Station
High Volume Sampler (HVS)	TE-5170X (S/N: 1105)	AM1
	TE-5170X (S/N: 1106)	AM2
	TE-5170X (S/N: 1856)	AM3
Direct Reading Dust Meter	Sibata LD-5R (S/N: 0Z4545)	AM1 to AM3
	Sibata LD-5R (S/N: 882106)
	Sibata LD-5R (S/N: 882110)
	Sibata LD-5R (S/N: 942532)
Calibration Kit (for HVS)	TE-5025A (S/N: 3465)	AM1 to AM3

3.1.4 Monitoring Methodology

1-hr TSP Monitoring

3.1.4.1 The 1-hr TSP impact monitoring was conducted using a portable direct reading dust meter.

Measuring Procedures

3.1.4.2 The measuring procedures of the 1-hr dust meter has been undertaken in accordance with the Manufacturer’s Instruction Manual as follows:

Procedure of starting monitoring

• Place the 1-hr dust meter at least 1.3m above ground;

• Turn on the “On/Off” button at the side of instrument. Program will be changed to “BG” mode and leave it for 1 minute.

• Pull out the Suction adaptor and turn the button at the side. Cover with hand at the suction adaptor measure the background for 10 seconds.

• Press “UP” and “DOWN” for choosing “SPAM Mode” for SPAM Measurement.

• Press “Up” and “Down” to select “Measurement Mode” with 60 minutes interval and unit in ug/m³.

• Press “Start/Stop” to start monitoring.

Procedure of setting measurement timer

• Press “Up” or “Down” to find “Setting LOG”.

• Select “Record Cycle” and change the record time subject to different project requirement. For example, setting the record cycle as 60 minutes for normal operation.

• Press “ESCAPS” back to the main page.

• Press “Up” or “Down” to access “Measurement Timer” and select “Measurement time” to change the time to 3 hours.

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

Calibration & Maintenance

3.1.4.3 The direct reading dust meters will be verified against calibrated high volume samples (HVSs) annually. A 2-day, three 3-hour measurement results per day from direct reading dust meter will be taken to compare with the sampling results from the HVS. The correlation between the direct reading dust meter and the HVS will then be concluded. By accounting for the correlation factor, the direct reading dust meter will be considered to achieve comparable results as that of the HVS.

3.1.4.4 All digital dust indicator will be calibrated with on-site HVS annually. Calibration certificate will be provided after calibration.

Quality Audit

3.1.4.5 Checklist of regular checking for digital dust meter will be conducted bi-weekly by environmental technician to ensure the all-digital dust meter are in good condition and submitted to supervisors. All checklists will be kept by supervisors.

3.1.4.6 Logbook is provided to environmental technician record the transferal of equipment to other colleagues, reporting to supervisors is required.

24-hr TSP Monitoring

3.1.4.7 The 24-hr TSP monitoring has been conducted using a High-Volume Sampler (HVS).

Measuring Procedures

3.1.4.8 The HVS has been set-up at the monitoring location with a fixed power supply for operation. The measuring procedures of the 24-hr TSP measurements has been undertaken in accordance with the specifications listed in the EM&A Manual. Each HVS includes a motor, a filter holder, a flow controller and a sampling inlet in accordance with the performance specification of the USEPA Standard Title 40, Code of Federation Regulations Chapter 1 (Part 50), Appendix B. The measuring procedures of the 24-hr dust meter was undertaken in accordance with the Manufacturer’s Instruction Manual as follows:

• The power supply will be checked to ensure the HVS works properly;

• The filter holder and the area surrounding the filter will be cleaned;

• The filter holder will be removed by loosening the four bolts and a new filter on a supporting screen will be aligned carefully;

• The filter will be properly aligned on the screen so that the gasket formed an airtight seal on the outer edges of the filter;

• The swing bolts will be fastened to hold the filter holder down to the frame. The pressure applied should be sufficient to avoid air leakage at the edges;

• The shelter lid will be closed and secured with the aluminium strip;

• The HVS will be warmed-up to establish run-temperature conditions;

• A new flowrate record sheet will be set into the flow recorder;

• The programmable timer will be set for a sampling period of 24 hour, and the starting time, weather condition and the filter number will be recorded;

• The initial elapsed time will be recorded;

• At the end of sampling, the sampled filter will be removed carefully and folded in half-length so that only surfaces with collected particulate matter will be in contact;

• The sample will be placed in a clean plastic envelope and sealed;

• All monitoring information will be recorded on a standard data sheet; and

• The filters will be taken back to HOKLAS accredited laboratory for analysis.

3.1.4.9 In addition, site conditions and dust sources were recorded in a standard form for direct input into a database.

Calibration & Maintenance

3.1.4.10 The high volume motors and their accessories should be properly maintained, including routine motor brushes replacement and electrical wiring checking, to ensure that the equipment and a continuous power supply were in good working condition.

3.1.4.11 Initial calibration of dust monitoring equipment shall be conducted upon installation and thereafter at bi-monthly intervals. The transfer standard shall be traceable to the internationally recognized primary standard and be calibrated annually.

The detail procedure of calibration of HVS is listed below:

1. Make sure the electrical circuit is connected properly. The motor should be directly connected to the power source.

2. Open the top cover and unlock the screws at the four corners.

3. Install the variable orifice and adapter plate to high volume air sample. Tighten the nut securely. Turn the knob of orifice clock-wise to close the four holes on the bottom open.

4. Hold the water manometer on the cover of mass flow controller vertically. Connect one side of a water manometer to the pressure tap on the side of the orifice with a rubber vacuum tube. Leave opposite side of the manometer open to the atmosphere.

5. Turn on the sampler

6. Turn the knob orifice counter clock-wise to adjust the openings the four holes on the bottom open. Record the manometer reading and the reading from continuous flow recorder. At least 5 sets of data should be recorded.

3.1.5 Monitoring Results

3.1.5.1 The impact dust monitoring results are summarized in Table 3-4 and Table 3-5. The monitoring data together with graphical presentations are presented in Appendix E and Appendix F.

Table 3-4 Summary of Impact 1-hr TSP Monitoring Results

Dust Monitoring Station	Average 1-hr TSP Concentration, µg/m³ (Range)	Action Level, µg/m³	Limit Level, µg/m³
AM1	54 (44 – 65)	>285	>500
AM2	54 (45 – 61)	>279	>500
AM3	63 (57 – 68)	>285	>500

Table 3-5 Summary of Impact 24-hr TSP Monitoring Results

Dust Monitoring Station	Average 24-hr TSP Concentration, µg/m³ (Range)	Action Level, µg/m³	Limit Level, µg/m³
AM1	114 (88 – 147)	>164	>260
AM2	65 (43 – 92)	>152	>260
AM3	140 (126 – 157)	>163	>260

3.1.5.2 No exceedance of Action and Limit Levels of construction dust was recorded during the reporting period. Therefore, there was no record of Notification of Environmental Quality Limits Exceedance in the Appendix G.

3.1.5.3 No effect that arose from the other special phenomena and work progress of the concerned site was noted during the current monitoring month.

3.1.6 Wind Data Monitoring

3.1.6.1 During the monitoring period. wind data from existing weather station in the vicinity of the designated monitoring location, i.e Ta Kwu Ling station operated by Hong Kong Observatory was adopted. It is considered that the wind data obtained from Ta Kwu Ling station are representative of the Project area and could be used for the construction dust monitoring programme for the Project. The results for wind data monitoring are presented in Appendix H.

3.1.7 Recommended Mitigation Measures

3.1.7.1 The recommended dust mitigation measures from EIA report are listed as followed:

• The contractor shall follow the procedures and requirements given in the Air Pollution Control (Construction Dust) Regulation.

• Dust emission from construction vehicle movement is confined within the worksites area.

• Watering facilities will be provided at every designated vehicular exit point.

• Good site practice is recommended during construction phase. Covering with impermeable sheet should be provided for the inactive tipping area.

3.1.8 Event and Action Plan

3.1.8.1 Should non-compliance of the criteria occur, action in accordance with the action plan in Table 3-6 shall be carried out.

Table 3-6 Event and Action Plan for dust impact

4 Noise Monitoring

4.1 Monitoring Requirement

4.1.1 In accordance with the EM&A manual, noise impact monitoring shall be carried out at 2 monitoring stations NM1 and NM2 once a week during normal construction working hour (0700-1900 Monday to Saturday). The minimum logging interval shall be 30 minutes with average of 6 consecutive Leq 5 mins. L10 and L90 shall also be measured at 5 mins intervals.

4.2 Monitoring Locations, Parameters and Frequency

4.2.1 According to the EM&A Manual, two monitoring stations namely NM1 and NM2 are selected for the impact monitoring.

4.2.2 A baseline monitoring plan has been submitted to IEC and EPD on 31 May 2022 including the proposal with justification of change of monitoring locations. Due to limited access to the original monitoring locations at NM1 and NM2, the adjusted stations at NM1a and NM2a were agreed with IEC prior to the baseline and impact monitoring. The noise monitoring locations are summarized in Table 4-1 and shown in Figure 2.

4.2.3 The detailed monitoring schedule is shown in Appendix C. The frequency and duration are shown in Table 4-2.

Table 4-1 Noise Monitoring Locations

Monitoring Station	Representative for	Type of Measurement
Monitoring Station	Representative for	Type of Measurement
NM1a	Wo Keng Shan Tsuen	Free field
NM2a	Lin Ma Hang	Free field

Remarks:

NM1 Wo Keng Shan Tsuen & NM2 Lin Ma Hang are the noise monitoring stations for the construction phase EM&A programme as identified in the approved EM&A Manual for the Project. The access to Tung Lo Hang, Heung Yuen Wai and Wo Keng Shan Tsuen were denied. A search for alternative noise monitoring locations (NM1a & NM2a) was carried out during the site visit.

The Baseline Monitoring Plan has been submitted to IEC including the proposal of change of monitoring locations on 31 May 2022. This arrangement was conducted between baseline and impact monitoring and has been agreed by the Independent Environmental Checker (IEC). Noise measurement at NM1a & NM2a will be considered as free-field and a correction of +3dB(A) would be made to the noise monitoring results.

Due to the adjustment of the location of NM1 & NM2 to NM1a & NM2a, the measured noise levels at NM1 & NM2 would represent the noise levels at NM1 & NM2.

Table 4-2 Noise Monitoring Parameters, Frequency and Duration

Monitoring Station	Parameter	Frequency and Duration
NM1a and NM2a	L_Aeq (30mins) average of 6 consecutive L_eq (5min); L10 (5min) & L90 (5min)	once a week during normal construction working hour (0700-1900 Monday to Saturday)

4.3 Monitoring Equipment

4.3.1 Integrating Sound Level Meters (SLMs) was used for noise impact monitoring. The SLM complied with International Electrotechnical Commission Publications 651:1979 (Type 1) and 804:1985 (Type 1) specifications shall be used for carrying out noise monitoring. The accuracy of the SLM was checked using an acoustic calibrator generating a known sound pressure level at a known frequency. Measurements shall be accepted as valid only if the calibration level from prior to and after the noise measurement agrees to within 1.0dB.

4.3.2 A portable wind speed meter was used for measuring wind speeds in m/s.

4.3.3 Table 4-3 summarises the equipment that have been used in the impact noise monitoring programme. The calibration certificates are shown in Appendix D.

Table 4-3 Noise Monitoring Equipment

Equipment	Model
Sound Level Meter	NTi XL2 (S/N: A2A-09696-E0)
Acoustic Calibrator	Rion NC-74 (S/N: 34504770)
Anemometer	RS-90 (S/N: 210722168)

4.4 Monitoring Methodology

4.4.1 The details of noise measurement procedures are described as follows:

• Free-field measurements were made at the monitoring locations.

• For free field, the Sound Level Meter was set at a height of 1.2 m above the ground. The battery condition was checked to ensure the proper functioning of the meter.

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

• Frequency weighting: A

• Time weighting: Fast

• Measurement time: 5 minutes (Leq (30-min) would be determined for daytime noise by calculating the logarithmic average of six Leq (5min) data.)

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

• Noise measurement should be paused during periods of high intrusive noise if possible and observation shall be recorded when intrusive noise is not avoided.

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

• All noise monitoring will be conducted with the wind speed not exceeding 5m/s and no gusts exceeding 10m/s.

4.5 Monitoring Results

4.5.1 The impact noise monitoring results are summarized in Table 4-4. The monitoring data together with graphical presentations are presented in Appendix E and Appendix F.

Table 4-4 Summary of Noise Monitoring Results during normal working hours (07:00-19:00, Monday to Saturday)

Noise Monitoring Station

Average Leq, 30min, dB(A) (Range)

Action Level

Limit Level

NM1a

51.1

(48.2 – 54.0)

When one documented complaint is received

>75dB(A)

NM2a

48.1

(47.6 – 50.0)

Remark:

(1) * A correction of +3 dB(A) was made to the free field measurements

(2) If works are to be carried out during restricted hours, the conditions stipulated in the construction noise permit issued by the Noise Control Authority have to be followed.

4.5.2 No exceedance of Action and Limit Levels of construction noise was recorded during the reporting period. Therefore, there was no record of Notification of Environmental Quality Limits Exceedance in the Appendix G.

4.5.3 No particular observations are identified near the monitoring stations during the monitoring period.

4.6 Recommended Mitigation Measures

4.6.1 The recommended dust mitigation measures from EIA report are listed as followed:

1. Use of good site practices to limit noise emissions by considering the following:

• Only well-maintained plant should be operated on-site and plant should be serviced regularly during the construction programme;

• Machines and plant (such as trucks, cranes) that may be in intermittent use should be shut down between work periods or should be throttled down to a minimum;

• Plant known to emit noise strongly in one direction, where possible, be orientated so that the noise is directed away from nearby NSRs;

• Silencers or mufflers on construction equipment should be properly fitted and maintained during the construction works;

• Mobile plant should be sited as far away from NSRs as possible and practicable;

• Material stockpiles, mobile container site officer and other structures should be effectively utilised, where practicable, to screen noise from on-site construction activities.

2. Select “Quiet plants” which comply with the BS 5228 Part 1 or TM standards.

4.7 Event and Action Plan

4.7.1 Should non-compliance of the criteria occurs, action in accordance with the action plan in Table 4-5 shall be carried out.

5 Water Quality Monitoring

5.1 Groundwater Monitoring

5.1.1 Monitoring Requirement

5.1.2 In accordance with the EM&A manual, groundwater quality monitoring shall be carried out at least once per month at the 35 designated groundwater monitoring locations (i.e ED1 to ED35). Based on the existing construction programme, site clearance and site formation works for future landfilling area are in progress. The groundwater monitoring locations ED1 to ED35 will be installed after the site formation work of the landfilling area. The target commencement period of groundwater monitoring will be in 2026.

5.2 Surface Water Monitoring

5.2.1 Monitoring Requirement

5.2.1.1 In accordance with the EM&A manual, impact surface water quality monitoring was carried out at the two designated surface water discharge points (i.e WM1 and WM2) for once per month from commencement of construction works of the Project.

5.2.2 Monitoring Locations, Parameters and Frequency

5.2.2.1 Impact surface water monitoring was carried out on 5 December 2022 at WM1 and WM2. The monitoring locations are indicated in Table 5-1 and Figure 2.

5.2.2.2 The monitoring parameters, frequency and duration of surface water quality baseline monitoring are summarized in Table 5-2. Detailed monitoring schedule is presented in Appendix C.

Table 5-1 Surface water quality monitoring locations

Monitoring Station	Location	Coordinates (HK Grid)
Monitoring Station	Location	Easting	Northing
WM1	Upstream of Lin Ma Hang River	836665	845020
WM2	Ping Yuen River	835592	844186

Table 5-2 Surface water quality monitoring Parameters, Frequency and Duration

Parameter	Frequency
pH, Electrical conductivity, DO, Turbidity, SS, Alkalinity, COD, BOD₅, TOC, Ammonia-nitrogen, TKN, Nitrate, Sulphate, Sulphite, Phosphate, Chloride, Sodium, Mg, Ca, K, Fe, Ni, Zn, Mn, Cu, Pb, Cd, Coliform Count, Oil and Grease	once per month

5.2.3 Monitoring Equipment

5.2.3.1 The measurements of pH, electrical conductivity (EC), DO, turbidity, water temperature and air temperature were undertaken in situ. In situ monitoring instruments in compliance with the specifications listed under Section 5.5 of the EM&A Manual were used to undertake the surface water quality monitoring for the Project. Table 5-3 summarises the equipment used in the impact surface water quality monitoring works. Copies of the calibration certificates are attached in Appendix D.

Table 5-3 Surface Water Quality Monitoring Equipment

Equipment	Model
Water Quality Meter	Horiba U-53 (S/N: PORBNFNT)
Water Flow Meter	FP111 (S/N: 22K100859)

5.2.4 Summary of Surface Water Quality Monitoring Procedure

Operational/ Analytical Procedures

5.2.4.1 In general, water samples were collected from within 500 mm of the water surface. Water was collected by a small clean open-mouthed bucket with the lip pointing upstream. Usually, water was then transferred to the sample bottles until they were filled to the top with no remaining air space before the lid was securely screwed on. For samples that were preserved with acid or alkalis prior to transport to the laboratory, the samples bottles were filled to the level specified by the analytical laboratory.

5.2.4.2 Analyses shall be carried out in accordance with methods described in ASTM or APHA -AWWA-WEF Standard.

Laboratory Analytical Methods

5.2.4.3 The testing of parameters presented in Table 5-4 for all stations was conducted by ALS Technichem (HK) Pty Ltd. (HOKLAS Registration No. 066). Comprehensive quality assurance and control procedures were in place in order to ensure quality and consistency in results. The detection limits are provided in Table 5-4.

Table 5-4 Surface Water Monitoring Detection Limits and Limit of Reporting

Parameters	Detection Limit (in EM&A Manual)	Limit of Reporting	Method Reference
pH	0.1	0.1	APHA 4500 H+ B
Electrical conductivity	1 mS/cm	1 mS/cm	APHA 2510 B
Alkalinity	1 mg/L	1 mg/L	APHA 2320 B
COD	10 mg/L	5 mg/L	APHA 5220 C
BOD₅	3 mg/L	2 mg/L	APHA 5210 B
TOC	1 mg/L	1 mg/L	APHA 5310 B
SS	0.1 mg/L	0.1 mg/L	APHA 2540 D
Ammonia-nitrogen	0.2 mg/L	0.01 mg/L	APHA 4500 NH3 G
TKN	0.4 mg/L	0.1 mg/L	APHA 4500Norg: D
Nitrate	0.5 mg/L	0.01 mg/L	APHA 4500 NO3 I
Sulphate	5 mg/L	1 mg/L	USEPA 375.4
Sulphite	2 mg/L	2 mg/L	APHA 4500 SO3 B
Phosphate	0.01 mg/L	0.01 mg/L	APHA 4500-P B & F
Chloride	0.5 mg/L	0.5 mg/L	USEPA 325.1
Sodium	50 mg/L	50 mg/L	USEPA 6010C
Mg	50 mg/L	50 mg/L	USEPA 6010C
Ca	50 mg/L	50 mg/L	USEPA 6010C
K	50 mg/L	50 mg/L	USEPA 6010C
Fe	50 mg/L	10 mg/L	USEPA 6010C
Ni	1 mg/L	1 mg/L	USEPA 6020A
Zn	10 mg/L	10 mg/L	USEPA 6020A
Mn	1 mg/L	1 mg/L	USEPA 6020A
Cu	1 mg/L	1 mg/L	USEPA 6020A
Pb	1 mg/L	1 mg/L	USEPA 6020A
Cd	0.2 mg/L	0.2 mg/L	USEPA 6020A
Coliform Count	1 cfu/ 100mL	1 cfu/ 100mL	DoE section 7.8, 7.9.4.1 & 3
Oil and Grease	5 mg/L	5 mg/L	APHA 5520 B

QA/ QC Requirements

5.2.4.4 All in situ monitoring instruments were checked, calibrated and certified by a laboratory accredited under HOKLAS or other international accreditation scheme before use, and subsequently re-calibrated at the intervals according to manufacturer’s requirement throughout all stages of the surface water quality monitoring programme. Responses of sensors and electrodes were checked with certified standard solutions before each use. Calibration for a DO meter was carried out before measurement according to the instruction manual of the equipment model. For the on-site calibration of field equipment, the requirements of the BS 1427:2018, "Guide to on-site test methods for the analysis of waters" was observed.

Decontamination Procedures

5.2.4.5 Water sampling equipment used during the course of the monitoring programme was decontaminated by manual washing and rinsed with clean distilled water after each sampling location.

Sampling Management and Supervision

5.2.4.6 All sampling bottles were labelled with the sample ID (including the indication of sampling station), laboratory number and sampling date. Water samples were dispatched to the testing laboratory for analysis as soon as possible after the sampling. All samples were stored in a cool box and kept at less than 4°C but without frozen. All water samples were handled under chain of custody protocols and relinquished to the laboratory representatives at locations specified by the laboratory. The laboratory determination works started within 24 hours after collection of water samples.

Quality Control Measures for Sample Testing

5.2.4.7 The samples testing was performed by ALS Technichem (HK) Pty Ltd. The following quality control programme was performed by the laboratory:

· One method blank; and

· One sample duplicate.

5.2.5 Monitoring Results

5.2.5.1 Impact surface water quality monitoring was conducted at WM1 and WM2 on 5 December 2022. No adverse weather was observed during reporting period. The detailed monitoring schedule is shown in Appendix C.

5.2.5.2 The summary of monitoring results are presented in Table 5-5. Detailed monitoring results at each monitoring station and graphical presentations of surface water quality (DO, SS and Turbidity) at the monitoring stations are given in Appendix E and Appendix F.

5.2.5.3 No particular observations are identified near the monitoring stations during the monitoring period.

5.2.5.4 No exceedance of Action and Limit Levels of surface water monitoring was recorded during the reporting period. Therefore, there was no record of Notification of Environmental Quality Limits Exceedance in the Appendix G.

Table 5-5 Summary of Impact Surface Water Monitoring Results

Monitoring Parameter(s)	Monitoring Station
	WM1			WM2
	Monitoring Results	Action Level	Limit Level	Monitoring Results	Action Level	Limit Level
pH	7.4	>7.7	>7.8	7.5	>7.6	>7.7
Electrical Conductivity in μS/cm	58	---	---	114	---	---
DO in mg/L	10.8	<7.4	<4	6.5	<5	<4
Turbidity in NTU	8.6	>9.2	>9.5	23.3	>108.3	>108.9
SS in mg/L	3.4	>9.7	>11.4	25.6	>94.5	>94.7
Alkalinity	16	---		35	---
COD	<5			<5
BOD₅	<2			<2
TOC	3			3
Ammonia-nitrogen	0.02			0.18
TKN	0.2			0.4
Nitrate	0.01			0.10
Sulphate	3			8
Sulphite	<2			<2
Phosphate	0.01			<0.01
Chloride	6			6
Sodium	8540			6710
Mg	410			1140
Ca	3180			12100
K	290			2310
Fe	660			6040
Ni	<1			<1
Zn	<10			21
Mn	42			2150
Cu	<1			2
Pb	<1			2
Cd	<0.2			<0.2
Coliform Count	Not detected			320
Oil and Grease	<5			<5

5.2.6 Recommended Mitigation Measure

5.2.6.1 The recommended surface water mitigation measures from EIA report are listed as followed:

• Channels (both temporary and permanent drainage pipes and culverts), earth bunds or sand bag barriers should be provided on site to direct stormwater to silt removal facilities.

• The overall slope of the site should be kept to a minimum to reduce the erosive potential of surface water flows.

• The design of efficient silt removal facilities should be based on the guidelines in Appendix A1 of ProPECC PN 1/94, which states that the retention time for silts and sediment traps should be 5 minutes under maximum flow conditions.

• All vehicles and plant should be cleaned before leaving a construction site to ensure no earth, mud, debris and the like is deposited by them on roads.

• Construction solid waste, debris and rubbish on site should be collected, handled and disposed of properly to avoid water quality impacts.

• Measures should be taken to prevent the washing away of construction materials, soil, silt or debris into any drainage system.

5.2.7 Event and Action Plan

5.2.7.1 Should non-compliance of the criteria occurs, action in accordance with the action plan in Table 5-6 shall be carried out.

6 Waste Management

2.1

6.1.1 Wastes generated from this Project include inert construction and demolition (C&D) materials and non-inert C&D materials. Non-inert C&D materials were made up of general refuse, steels and paper/cardboard packaging materials. Steel materials generated from the Project were also grouped into non-inert C&D materials as the materials were not disposed of with other inert C&D materials. With reference to relevant handling records and trip tickets of this Project, the quantities of different types of waste generated in the reporting month are summarised in Appendix I.

6.1.2 A total of 73.28 tonnes of general refuse was generated during the reporting period. The general refuse generated from the Project were disposed of at the NENT Landfill. A total of 300 tonnes of hard rock and large broken concrete was generated from the contract in December 2022. Due to the hard rock and large broken concrete was stored in the project site, the contractor had not yet reused in the contract during reporting period. Therefore, the quantities do not count in “Reused in the Contract” during reporting period. A total of 11.49 tonne of yard waste was generated during the reporting period.

6.1.3 The recommended waste management mitigation measures from EIA report are listed as followed:

• Implement a trip-ticket system to ensure that the movement of C&D materials are properly documented and verified in accordance with DEVB TC(W) No. 6/2010.

• Concrete and masonry should be used as general fill and steel reinforcement bars can be used by scrap steel mills.

• Proper areas should be designated for waste segregation and storage wherever site conditions permit.

• Maximise the use of reusable steel formwork to reduce the amount of C&D material.

• Maintain temporary stockpiles and reuse excavated fill material for backfilling and reinstatement.

• On-site sorting and segregation facility of all type of wastes is considered as one of the best practice in waste management and hence, should be implemented in all projects generating construction waste.

• The sorted public fill and C&D waste should be properly reused.

• Excavated slope, stockpiled material and bund walls should be covered by tarpaulin until used in order to prevent wind-blown dust during dry weather, and to reduce muddy runoff during wet weather.

7 Landfill Gas Monitoring

7.1 Monitoring Requirement during Construction

Monitoring for Construction Works

7.1.1 Intrinsically safe portable gas detectors should be used during excavation or when working in any confined spaces, which have the potential for presence of Landfill Gas (LFG) and risk of explosion or asphyxiation. The monitoring equipment should alarm, both audibly and visually, when the concentrations of the following gases were exceeded:

· CH₄: >10% Lower Explosion Limit (LEL);

· CO₂: >0.5%; and

· O₂: <18% by volume.

7.2 Monitoring Location

7.2.1 During the construction works within the NENT Landfill Extension site with excavation of 1m deep or more, LFG concentrations should be monitored before entry and periodically during the progress of works. If drilling is required, the procedures for safety management and working procedures as stipulated in EPD’s Landfill Gas Hazard Assessment – Guidance Note should be strictly adopted. The monitoring frequency and areas to be monitored should be set down prior to commencement of groundworks by the Safety.

7.2.2 The monitoring frequency and areas to be monitored should be set down prior to commencement of groundworks by the Safety Officer. All measurements in excavations should be made with the monitoring tube located not more than 10mm from the exposed ground surface. Monitoring of excavations should be undertaken as follows:

7.2.3 For excavation works deeper than 1m, measurements should be made:

• at ground surface prior to excavation;

• immediately before any worker enters the excavation;

• at the beginning of each working day for the entire period the excavation remains open; and

• periodically through the working day whilst workers are in the excavation.

For excavation between 300mm and 1m deep, measurements should be made:

• directly after the excavation has been completed; and

• periodically whilst the excavation remains open.

7.2.4 For excavations less than 300mm deep, monitoring may be omitted, at the discretion of the Safety Officer.

7.2.5 The locations of LFG monitoring locations during reporting period are shown in Table 7-1. The Site formation layout plan is shown in Figure 2.

Table 7-1 Locations of LFG Monitoring during reporting period

Monitoring Location	Type of works
Portion A +55 mpD Platform	Excavation Works

7.3 Monitoring Equipment

7.3.1 Gas Detector was used for carrying out LFG monitoring for Construction Works. Table 7-2 summarises the equipment that were used in the LFG monitoring programme. The calibration certificates are shown in Appendix D.

Table 7-2 LFG Monitoring Equipment

Equipment	Model
Gas Detector	PS200 (S/N: 373075)

7.4 & Event and Action Plan (EAP)

7.4.1 Should non-compliance of the criteria occur, action in accordance with the action plan in Table 7-3 shall be carried out.

Table 7-3 Action Plan for the monitoring during construction phase

Parameter	Monitoring Result	Action
Oxygen (O₂)	Action Level <19% O₂	Ventilate trench/void to restore O₂ to >19%
Oxygen (O₂)	Limit Level <18% O₂	Stop works Evacuate personnel/prohibit entry Increase ventilation to restore O₂ to >19%
Methane (CH₄)	Action Level >10% LEL*	Prohibit hot works Increase ventilation to restore CH₄ to <10% LEL
Methane (CH₄)	Limit Level >20% LEL*	Stop works Evacuate personnel/prohibit entry Increase ventilation to restore CH₄ to <10% LEL
Carbon dioxide (CO₂)	Action Level >0.5% CO₂	Ventilate to restore CO₂ to <0.5%
Carbon dioxide (CO₂)	Limit Level >1.5% CO₂	Stop works Evacuate personnel / prohibit entry Increase ventilation to restore CO₂ to <0.5%

* LEL: Lower Explosive Limit - concentrations in air below which there is not enough fuel to continue an explosion.

** This Action Level of CO₂ at 0.5% is set for reference only, assuming no CO₂ emission from a particular location.

Depending on the baseline CO₂ levels, the Action Level at a particular location will be changed.

7.5 Monitoring Results

7.5.1 The LFG monitoring was conducted at Portion A+55 mpD Platform in December 2022 (Conducted on working days). The LFG monitoring results are summarized in Table 7-4. The details monitoring data are presented in Appendix E.

Table 7-4 Summary of LFG Monitoring Results

LFG Monitoring Station	Monitoring Date	Monitoring Parameter(s)
		CH₄ in %	LEL in %/v	CO₂ in %	O₂ in %
		Monitoring Results
Portion A +55 mpD Platform	1 Dec 2022	0	0	0	20.8
	2 Dec 2022	0	0	0	20.7
	3 Dec 2022	0	0	0	20.7
	5 Dec 2022	0	0	0	20.6
	6 Dec 2022	0	0	0	20.5
	8 Dec 2022	0	0	0	20.4
	9 Dec 2022	0	0	0	20.4
	10 Dec 2022	0	0	0	20.3
	12 Dec 2022	0	0	0	20.4
	13 Dec 2022	0	0	0	20.5
	14 Dec 2022	0	0	0	20.4
	15 Dec 2022	0	0	0	20.2
	16 Dec 2022	0	0	0	20.3
	17 Dec 2022	0	0	0	20.3
	19 Dec 2022	0	0	0	20.3
	20 Dec 2022	0	0	0	20.1
	21 Dec 2022	0	0	0	20.3
	22 Dec 2022	0	0	0	20.2
	23 Dec 2022	0	0	0	20.4
	24 Dec 2022	0	0	0	20.3
	28 Dec 2022	0	0	0	20.3
	29 Dec 2022	0	0	0	20.3
	30 Dec 2022	0	0	0	20.4
	31 Dec 2022	0	0	0	20.2
Action Level		>10% LEL	---	>0.5%** CO₂	<19%

* LEL: Lower Explosive Limit - concentrations in air below which there is not enough fuel to continue an explosion.

** This Limit Level of CO₂ at 0.5% is set for reference only, assuming no CO₂ emission from a particular location.

7.5.2 No exceedance of Limit Levels of LFG was recorded during the reporting period. Therefore, there was no record of Notification of Environmental Quality Limits Exceedance in the Appendix G.

7.5.3 No effect that arose from the other special phenomena and work progress of the concerned site was noted during the current monitoring month.

7.6.1 The recommended landfill gas mitigation measures from EIA report are listed as followed:

• Special LFG precautions should be taken due to close proximity of NENT landfill extension site to existing landfill to avoid potential hazards of LFG exposure (ignition, explosion, asphyxiation, toxicity).

• Prominent safety warning signs should be erected on-site to alert all personnel and visitors of LFG hazards during excavation works.

• No smoking or burning should be permitted on-site.

• Prominent 'No smoking' and ‘No Naked Flames’ signs should be erected on-site.

• No worker should be allowed to work alone at any time in excavated trenches or confined areas on-site.

• Adequate fire fighting equipment should be provided on-site.

• Construction equipment should be equipped with vertical exhaust at least 0.6m above ground installed with spark arrestors.

• Electrical motors and extension cords should be explosion-proof and intrinsically safe for use on-site.

• ’Permit to Work' system should be implemented.

• Welding, flame-cutting or other hot works should be conducted only under ‘Permit to Work’ system following clear safety requirements, gas monitoring procedures and presence of qualified persons to supervise the works.

8 Landscape and Visual

8.1 Monitoring Requirement

3.1

8.1.1 In order to monitor the landscape and visual impact after providing mitigation measures effectively, all the specified and affected LCAs, LRs and VSRs should be monitored. Implementation of the mitigation measures during construction phase of the Project has been monitored through the regular site inspection/audit.

8.1.2 All relevant environmental mitigation measures listed in the approved EIA Report and the EM&A Manual and their implementation status are summarised in Appendix K.

8.2 Result and Observation

8.2.1 Measures to mitigate the landscape and visual impacts during the construction phase has been checked to ensure compliance with the intended aims of the measures within the reporting period. The progress of the engineering works are regularly reviewed on site to identify the earliest practical opportunities for the landscape works to be undertaken.

8.2.2 In order to monitor the landscape and visual impact after providing mitigation measures effectively, all the specified and affected LCAs, LRs and VSRs should be monitored. Implementation of the mitigation measures during construction phase of the Project has been monitored through the regular site inspection/audit.

9 Cultural Heritage

4.1

9.1.1 The Mitigation measures for preservation of the cultural landscape feature located within the project area was conducted before commencement of construction of the project based on the requirement of Survey Report and Mapping Records for Boulder Paths BP1 & 2 & Conditions of G2, G4, G5 G6, G7, G8, G14, G15, G25, G26 and G27 within NENTX.

9.1.2 The survey and mapping works carried out on 25 April 2022, the checking works by IC on 8 July 2022 and the verification works carried out on 23 August 22 confirmed that both 2 boulder paths BP1 and BP2 are fall outside the site boundary and the Project area.

9.1.3 All the affected graves within the waste boundary have been removed in accordance with section 119(1) of the Public Health and Municipal Services Ordinance (Cap 132). Removal of the graves as shown on Figure 2 attached to the FEP was proven by the visit of graves on 7 July 2022 and re-visit of the graves together with IC Representatives on 8 July 2022. All the graves as shown on Figure 2 attached to the FEP were abandoned and removed and no mitigation or preservation measures is necessary.

9.1.4 The Survey Report and Mapping Records for Boulder Paths BP1 & 2 was certified by ET on 10 Oct 2022, was verified by IEC and submitted to EPD on 12 Oct 2022. The Conditions of G2, G4, G5 G6, G7, G8, G14, G15, G25, G26 and G27 within NENTX was certified by ET, was verified by IEC and submitted to EPD on 15 Oct 2022. No later than four weeks before commencement of construction of the project in accordance with Condition 2.4 of the FEP-01/292/2007.

9.1.5 Implementation of the mitigation measures such as temporary fencing to protect the boulder path and setting up warning notices during construction phase of the Project has been monitored through the regular site inspection/audit. The temporary fencing locations are shown in Appendix M. In case of any presence of undiscovered grave during construction phase, AMO will be informed as soon as possible.

10 Ecological Monitoring

5.1

10.1.1 In the reporting period, the post-translocation monitoring for the Endemic Freshwater Crab Somanniathelphusa zanklon was conducted on 29 December 2022 based on the requirement of the approved Revised Translocation Proposal for the Endemic Freshwater Crab Somanniathelphusa zanklon. The 5^th Post-Translocation Monitoring Report (December 2022) presents the details of requirements, monitoring results and site inspection with photos. The site inspection photos are also summarized in Appendix N. During the reporting period, no S. zanklon individual is identified.

10.1.2 The post-transplantation monitoring was conducted on 9 and 21 December 2022 based on the requirement of the approved Transplantation Proposal for Plant Species of Conservation Importance (Rev.1). The 2^nd Post-transplantation Monitoring and Audit Report (9 December 2022) & 3^rd Post-transplantation Monitoring and Audit Report (21 December 2022) present the details of requirements, monitoring results and site inspection with photos. The site inspection photos are also summarized in Appendix N. During the reporting period, the numbers, measurements, and health conditions of the transplanted plant species are recorded.

10.1.3 The details of requirements, monitoring results and site inspection with photos for the post-translocation monitoring and post-transplantation monitoring would be reported separately.

10.1.4 The milestone of the ecological monitoring is presented in Table 10-1. The softcopies of the submissions are provided in https://www.nentx-ema.com/.

Table 10-1 Milestone of the Ecological Monitoring

Type of Monitoring	Monitoring Event No.	Monitoring Date
Post-translocation Monitoring	1^st (Aug 2022)	29 Aug 2022
	2^nd (Sep 2022)	28 Sep 2022
	3^rd (Oct 2022)	28 Oct 2022
	4^th (Nov 2022)	22 Nov 2022
	5^th (Dec 2022)	29 Dec 2022

Post-transplantation Monitoring	1^st	24 Nov 2022
	2^nd	9 Dec 2022
	3^rd	21 Dec 2022

11 Site Inspection and Audit

11.1.1 Site Inspection and audits were carried out by ET on weekly basis to monitor the implementation of proper environmental management practices and mitigation measures in the Project Site.

11.1.2 Weekly ET environmental site inspections were conducted in the reporting period on 05, 12, 19 and 28 December 2022. A joint environmental site inspection was carried out by the representatives of the ER, the Contractor, IEC and the ET on 19 December 2022. The joint environmental site inspection records are shown in Appendix J. There was no noncompliance recorded during the site inspections.

11.1.3 Major findings and recommendations are summarized as follows:

05 December 2022

• The accumulated waste shall be disposed regularly. The Contractor was recommended to increase the frequency of waste disposal to avoid accumulate waste.

• Open cut slope shall be covered with impervious sheeting. The Contractor was reminded to cover the exposed slopes with impervious sheet to minimize dust dispersion.

12 December 2022

• The vehicle exit road shall be kept clear of dusty materials. The Contractor was reminded to schedule watering for the vehicle exist road.

• The Contractor was reminded to cover the exposed slope with impervious sheet for upcoming rainfall in this week. All exposed slopes shall be covered with impervious sheets during rainfall.

• The accumulated waste is observed. The Contractor was recommended to increase the frequency of waste disposal to avoid accumulation of waste.

19 December 2022

• Sediments are accumulated in the channel at the vehicle wash bay. The Contractor was reminded to remove the sediments at least on a weekly basis.

28 December 2022

• The vehicle road is covered with dusty materials in Portion A. The vehicle entrance shall be kept clear of dusty materials.

• The work area is dry and fugitive dust is observed from loading and unloading activity in Portion D. The Contractor has been reminded to schedule watering for work area and to spray with water during loading and unloading activities.

• Latex paint drums are observed without drip trays in Portion A. Drip tray shall be provided for latex paint drums

11.1.4 Environmental Protection Department-Regional Office (North) conducted general site inspection on 23 December 2022. No special findings were identified during the inspection.

12 Environmental Non-conformance

11.1

12.1 Summary of Monitoring Exceedance

12.1.1 No exceedance of the Action and Limit Levels was recorded at monitoring station during the reporting period.

12.2 Summary of Environmental Non-compliance

12.2.1 No non-compliance event was recorded during the reporting period.

12.3 Summary of Environmental Complaint

12.3.1 One complaint on 20 December 2022 was received by the public relations officer of the Contractor during the reporting period. The complaint lodged regarding presenting much dusty materials at roundabout at Wo Keng Shan Road & dusty flying problem at Kowloon-bound traffic at Lung Shan Tunnel. After Investigation, it was found that no dusty materials or wastes were transported out from the NENTX site during the complaint period in accordance with the construction record. In addition, it was observed that the wheel washing facilities with high pressure water jet have been provided at all sites exit of NENTX (i.e. Portion A and D) and all vehicles were cleaned before allowing them to leave the construction site to ensure that no mud or debris would be brought to the public area. All site vehicles of NENTX are also required to go through the auto wheel washing facility, which is managed by the operator of the NENT landfill, before entering the public area. The road section between the washing facilities and the exit point was paved with concrete, or bituminous materials were implemented in all site entrances/exits. No mud generated from vehicles under the NENTX project after exiting the site entrance were observed. Therefore, there is no direct evidence showing that the complaint is likely related to NENTX. The investigation report is provided in Appendix O.

12.4 Summary of Environmental Summons and Successful Prosecution

12.4.1 No summons was received during the reporting period

13 Implementation Status on Environmental Mitigation Measures

12.1

13.1.1 The Contractor has generally implemented environmental mitigation measures and requirements as stated in the EIA Report, the EP and EM&A Manual and the contract documents. The implementation status during the reporting period is summarized in Appendix K.

14 Future Key Issues

13.1

14.1 Key Issues for the Coming Month

14.1.1 Works to be undertaken for the coming monitoring periods are summarized below. Detailed construction activities and locations are summarized in Appendix L.

- Material loading and unloading, site traffic

- Permanent site office foundation works with pouring of concrete

- Site clearance

- Installation of permanent fencing

- Site formation

- Tree felling

14.1.2 Potential environmental impacts arising from the above construction activities are mainly associated with air quality, construction noise, water quality, waste management, landfill gas monitoring, landscape and visual, cultural heritage and ecology

14.2 Monitoring Schedule for the Next Month

14.2.1 The tentative schedule of environmental monitoring for the next reporting period is presented in Appendix C.

14.3 Construction Programme for the Next Month

14.3.1 The most updated construction programme for the Project is presented in Appendix A.

15 Conclusion

15.1.1 1-hr & 24-hr TSP impact monitoring was carried out in the reporting month. No Action / Limit Level exceedance at AM1, AM2 & AM3 was recorded during the period.

15.1.2 Construction noise monitoring was carried out in the reporting month. No Action / Limit Level exceedance at NM1a & NM2a was recorded during the period.

15.1.3 Site clearance of future landfilling area is in progress. The installation of groundwater monitoring boreholes will be installed after the site formation work of the landfilling area. The target commencement period of groundwater monitoring will be in 2026.

15.1.4 Surface water monitoring was carried out in the reporting month. No Action / Limit Level exceedance at WM1 & WM2 was recorded during the period.

15.1.5 Landfill Gas Monitoring was carried out in the reporting month. No exceedance of Limit Levels of LFG was recorded during the reporting period.

15.1.6 In terms of cultural heritage, implementation of the mitigation measures such as temporary fencing to protect the boulder path and setting up warning notices during construction phase of the Project has been monitored through the regular site inspection/audit in the reporting period. All the mitigation measures are in order.

15.1.7 Post-translocation Monitoring was carried out in the reporting period. No S. zanklon individual was found. Post-transplantation monitoring was carried out in the reporting month. The numbers, measurements and health conditions of the transplanted species are recorded.

15.1.8 Four environmental site inspections were carried out in the reporting month. Recommendations on mitigation measures for Permit/ Licenses were given to the Contractor for remediating the deficiencies identified during the site inspections.

15.1.9 One complaint on 20 December 2022 was received by the public relations officer of the Contractor during the reporting period. There is no direct evidence showing that the complaint is likely related to NENTX.

15.1.10 No non-compliance event was recorded during the reporting period.

15.1.11 No notification of summons and prosecution was received during the reporting period.

15.1.12 The ET will keep track on the EM&A programme to ensure compliance of environmental requirements and the proper implementation of all necessary mitigation measures.

Event	ET	IEC	Contractor
Exceedance of Action Level
Exceedance for one sample	• Identify source • Prepare Notification of Exceedance • Inform IEC and Contractor • Repeat measurement to confirm findings • Increase monitoring frequency to daily if exceedance is due to the Project and continue until the monitoring results reduce to below action level	• Verify the Notification of Exceedance • Check monitoring data submitted by ET and Contractor's working methods • Discuss with ET and Contractor on proposed remedial measures	• Rectify any unacceptable practice • Amend working methods if appropriate
Exceedance for two or more consecutive samples	• Identify source • Prepare Notification of Exceedance • Inform Contractor and IEC • Repeat measurements to confirm findings • Increase monitoring frequency to daily if exceedance is due to the Project and continue until the monitoring results reduce to below action level • Discuss with IEC for remedial action required • Ensure remedial measures are properly implemented • Continue monitoring at daily intervals if exceedance is due to the Project • If no exceedance for 3 consecutive days, cease additional monitoring	• Verify the Notification of Exceedance • Check monitoring data submitted by ET and Contractor's working methods • Discuss with ET and Contractor on proposed remedial measures • Review with analysed results submitted by ET • Review the proposed remedial measures by Contractor • Supervise the implementation of remedial measures	• Submit proposals for remedial actions to IEC within 3 working days of notification • Implement the agreed proposals • Amend proposal if appropriate

Event	ET	IEC	Contractor
Exceedance of Limit Level
Exceedance for one sample	• Identify source • Prepare Notification of Exceedance • Inform IEC and Contractor • Repeat measurement to confirm findings • Increase monitoring frequency to daily if exceedance is due to the Project and continue until the monitoring results reduce to below limit level • Assess effectiveness of Contractor's remedial actions and keep EPD and IEC informed of the results	• Verify the Notification of Exceedance • Check monitoring data submitted by ET and Contractor's working methods • Discuss with ET and Contractor potential remedial actions • Supervise the implementation of remedial measures	• Take immediate action to avoid further exceedance • Submit proposals for remedial actions to IEC within 3 working days of notification • Implement the agreed proposals • Amend proposal if appropriate
Exceedance for two or more consecutive samples	• Identify source • Prepare Notification of Exceedance • Inform IEC and EPD the causes and actions taken for the exceedances • Discuss with IEC for remedial action required • Ensure remedial measures are properly implemented • Assess effectiveness of Contractor’s remedial actions and keep IEC, EPD and informed of the results • Increase monitoring frequency to confirm findings • If exceedance stops, cease additional monitoring	• Verify the Notification of Exceedance • Check monitoring data submitted by ET and Contractor's working methods • Discuss amongst ET and Contractor on the potential remedial actions. • Review Contractor's remedial actions whenever necessary to assure their effectiveness • Supervise the implementation of remedial measures	• Take immediate action to avoid further exceedance • Submit proposals for remedial actions to IEC of notification • Implement the agreed proposals • Resubmit proposals if problem still not under control • Stop the relevant activity of works until the exceedance is abated

Figure 1	Location of the Project Site
Figure 2	Impact Monitoring Locations

Appendix A	Construction Program
Appendix B	Project Organization Chart & Management Structure
Appendix C	Monitoring Schedule for Reporting Month & Next Month
Appendix D	Calibration Certificates
Appendix E	Monitoring Results
Appendix F	Graphical Presentations
Appendix G	Notification of Environmental Quality Limits Exceedance
Appendix H	Wind Data
Appendix I	Waste Flow Table
Appendix J	Joint Environmental Site Inspection Records
Appendix K	Environmental Mitigation Implementation Schedule (EMIS)
Appendix L Appendix M Appendix N	Construction Site Activities Mitigation Measures of Cultural Landscape Features Ecological monitoring record
Appendix O	Investigation Report
Appendix P	Detail Status of Submissions required under the FEP & EP

Table 2-4 Summary of the relevant valid permits, licences, and/or notifications on environmental protection

• Place the 1-hr dust meter at least 1.3m above ground;

• Turn on the “On/Off” button at the side of instrument. Program will be changed to “BG” mode and leave it for 1 minute.

• Pull out the Suction adaptor and turn the button at the side. Cover with hand at the suction adaptor measure the background for 10 seconds.

• Press “UP” and “DOWN” for choosing “SPAM Mode” for SPAM Measurement.

• Press “Up” and “Down” to select “Measurement Mode” with 60 minutes interval and unit in ug/m3.

• Press “Start/Stop” to start monitoring.

• Press “Up” or “Down” to find “Setting LOG”.

• Select “Record Cycle” and change the record time subject to different project requirement. For example, setting the record cycle as 60 minutes for normal operation.

• Press “ESCAPS” back to the main page.

• Press “Up” or “Down” to access “Measurement Timer” and select “Measurement time” to change the time to 3 hours.

• The power supply will be checked to ensure the HVS works properly;

• The filter holder and the area surrounding the filter will be cleaned;

• The filter holder will be removed by loosening the four bolts and a new filter on a supporting screen will be aligned carefully;

• The filter will be properly aligned on the screen so that the gasket formed an airtight seal on the outer edges of the filter;

• The swing bolts will be fastened to hold the filter holder down to the frame. The pressure applied should be sufficient to avoid air leakage at the edges;

• The shelter lid will be closed and secured with the aluminium strip;

• The HVS will be warmed-up to establish run-temperature conditions;

• A new flowrate record sheet will be set into the flow recorder;

• The programmable timer will be set for a sampling period of 24 hour, and the starting time, weather condition and the filter number will be recorded;

• The initial elapsed time will be recorded;

• At the end of sampling, the sampled filter will be removed carefully and folded in half-length so that only surfaces with collected particulate matter will be in contact;

Table 3-4 Summary of Impact 1-hr TSP Monitoring Results

Table 3-5 Summary of Impact 24-hr TSP Monitoring Results

Table 4-1 Noise Monitoring Locations

Table 4-2 Noise Monitoring Parameters, Frequency and Duration

Frequency and Duration

Table 4-4 Summary of Noise Monitoring Results during normal working hours (07:00-19:00, Monday to Saturday)

Monitoring Station

Location

Coordinates (HK Grid)

Easting

Northing

Table 5-5 Summary of Impact Surface Water Monitoring Results

14.1.1 Works to be undertaken for the coming monitoring periods are summarized below. Detailed construction activities and locations are summarized in Appendix L.

14.2.1 The tentative schedule of environmental monitoring for the next reporting period is presented in Appendix C.

14.3.1 The most updated construction programme for the Project is presented in Appendix A.

• Press “Up” and “Down” to select “Measurement Mode” with 60 minutes interval and unit in ug/m³.