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 2^nd Quarterly EM&A Report presents the EM&A works conducted from 1 April to 30 June 2023 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:

Construction Activities Undertaken	Reporting Month
Construction Activities Undertaken	Apr 2023	May 2023	Jun 2023
- 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	✓	✓	✓

Environmental Exceedance

Air Quality, Noise & Landfill Gas Monitoring

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

Surface Water Quality Monitoring

No exceedance of the Action Level was recorded at designated monitoring stations during the reporting period. 1 Turbidity exceedance of the Limit Level for surface wate quality was recorded during the reporting period. The investigation results will be presented when the investigation of limit level exceedance of surface water quality is finished.

Environmental Non-conformance/Compliant/Summons and Prosecution

No non-compliance event & summons/prosecutions were recorded and received in this reporting period.

1 complaint & 1 enquiry were recorded on 14 June 2023 & 15 June 2023. The investigation results will be presented when the investigation was finished.

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, Quarterly EM&A report should be submitted to the Director of Environmental Protection (DEP) within 10 working days after the end of the reporting quarter. 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 2^nd Quarterly EM&A Report which summarises the impact monitoring results and audit findings for the EM&A programme during the reporting period from 01 April to 30 June 2023.

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 – Conclusion

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 are summarized in Appendix B.

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

Construction Activities Undertaken	Reporting Month
Construction Activities Undertaken	Apr 2023	May 2023	Jun 2023
- 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	✓	✓	✓

2.2. Project Organization & Management Structure

2.2.1. The Project Organization Chart & Management Structure are shown in Appendix C. 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 Ltd.)	Ms. Kristy Wong	2902 5260
Independent Environmental Checker (IEC) (Meinhardt Infrastructure and Environment Ltd.)	Ms. Claudine Lee	2859 5409
Environmental Team Leader (ETL) (Aurecon Hong Kong Limited)	Mr. Fredrick Leong	3664 6888

2.3. Status of Submission required under the FEP & EP during reporting period

2.3.1. The status of statutory environmental compliance with the EP conditions under the EIAO, submission status under the FEP & EP during reporting period 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 D.

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

FEP Condition	EP Condition	Submission / Measures	Status
2.1	2.3	Management Organization of Main Construction Companies	Submitted
2.2	2.4	Setting up of Community Liaison Group	Community Liaison Group was set up.
2.3	2.5	Submission of EM&A Manual	Submitted
2.5	2.7	Submission of Vegetation Survey (Transplantation Proposal)	Submitted
2.6	2.8	Submission of translocation proposal	Submitted
2.7	2.9	Submission of Transplantation Report and Post-Transplantation Monitoring	Submitted 9^th monitoring (21 Apr 2023) 10^th monitoring (17 May 2023) 11^th monitoring (16 Jun 2023)
2.8	2.10	Submission of Translocation Report and Post-Translocation Monitoring	Translocation was carried out and the report submitted. 9^th monitoring (19 Apr 2023) 10^th monitoring (12 May 2023) 11^th monitoring (7 Jun 2023)
2.9	2.11	Submission of Detailed Landfill Gas Hazard Assessment Report	Submitted
2.10	2.12	Submission of Waste Management Plan	Submitted
3.2	3.2	Submission of Baseline Monitoring Report	Submitted
3.3	3.3	Submission of Monthly EM&A Report	5^th report (Apr 2023) 6^th report (May 2023) 7^th report (Jun 2023)

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 Construction Phase	Notified on 13 May 2022
Registration of Waste Producer under Waste Disposal Ordinance	7043692	Throughout the Contract	Registered on 13 April 2022
Registration as Chemical Waste Producer	5213-642-P1034-18	Throughout the Contract	Registered on 11 July 2022
Construction Noise Permit	GW-RN0299-23	22 June 2023	Permit granted on 21 March 2023
Construction Noise Permit	GW-RN0619-23	22 September 2023	Permit granted on 16 June 2023 (replaced the CNP No. GW-RN0299-23)
Effluent Discharge License under Water Pollution Control Ordinance	WT00042301-2022	31 October 2027	Permit granted on 18 October 2022 Variation of Licence (Permit granted on 7 February 2023)

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 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 Approved 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.

The Baseline Monitoring Plan has been submitted to IEC and EPD 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) and no comment received from EPD.

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 M onitoring Results

3.1.3.1 The impact dust monitoring results are summarized in Table 3-3 and Table 3-4. The graphical presentations of monitoring data are presented in Appendix E.

Table 3-3 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
Dust Monitoring Station	Apr 2023	May 2023	Jun 2023	Action Level, µg/m³	Limit Level, µg/m³
AM1	35 (19 – 55)	23 (15 – 40)	28 (15 – 38)	>285	>500
AM2	42 (31 – 76)	30 (15 – 43)	31 (21 – 45)	>279	>500
AM3	40 (23 – 54)	35 (26 – 49)	33 (21 – 45)	>285	>500

Table 3-4 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
Dust Monitoring Station	Apr 2023	May 2023	Jun 2023	Action Level, µg/m³	Limit Level, µg/m³
AM1	60 (34 – 112)	62 (28 – 106)	47 (28 – 95)	>164	>260
AM2	63 (37 – 111)	73 (53 – 87)	41 (32 – 54)	>152	>260
AM3	70 (40 – 151)	93 (29 – 121)	82 (43 – 130)	>163	>260

3.1.3.2 The Summary of Impact 1-hr & 24-hr TSP Exceedance are shown in Table 3-5.

Table 3-5 Summary of Impact 1-hr & 24-hr TSP Exceedance

Dust Monitoring Station	Parameter	1-hr TSP	Exceedance Count	Accumulate of project	24-hr TSP	Exceedance Count	Accumulate of project
Dust Monitoring Station	Level Exceedance	1-hr TSP	Exceedance Count	Accumulate of project	24-hr TSP	Exceedance Count	Accumulate of project
AM1	Action	0	0	0	0	0	2*
AM1	Limit	0	0	0	0	0	3*
AM2	Action	0	0	0	0	0	0
AM2	Limit	0	0	0	0	0	0
AM3	Action	0	0	0	0	0	4*
AM3	Limit	0	0	0	0	0	3*

Remarks: * equal to non-project related

3.1.3.3 No Action / Limit Level exceedance for 1-hr & 24-hr TSP impact monitoring at AM1, AM2 & AM3 was recorded during the reporting period. The Notification of Environmental Quality Limits Exceedances are presented in Appendix F.

3.1.4 Recommended Mitigation Measures

3.1.4.1 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.

3.1.5 Event and Action Plan

3.1.5.1 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

5 Water Quality Monitoring

5.1 Groundwater Monitoring

5.1.1 Monitoring Requirement

5.1.1.1 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. No groundwater monitoring is required before the completion of site formation work of the landfilling area.

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 The monitoring locations are indicated in Table 5-1 and Figure 2. The monitoring parameters, frequency and duration of surface water quality monitoring are summarized in Table 5-2.

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 Results

5.2.3.1 The summary of monitoring results are presented in Table 5-3 & Table 5-4. Detailed graphical presentations at each monitoring station of surface water quality (DO, SS and Turbidity) at the monitoring stations are given in Appendix E.
Table 5-3 Summary of Impact Surface Water Monitoring Results at WM1

Monitoring Parameter(s)	Monitoring Station WM1
	Monitoring Results			Action Level	Limit Level
	Apr 2023	May 2023	Jun 2023	Action Level	Limit Level
pH	7.1	6.9	7.1	>7.7	>7.8
Electrical Conductivity in μS/cm	64	69	73	---	---
DO in mg/L	7.8	7.9	7.6	<7.4	<4
Turbidity in NTU	0.4	3.1	5.7	>9.2	>9.5
SS in mg/L	3.2	3.3	6.6	>9.7	>11.4
Alkalinity	13	18	15	---
COD	17	10	9
BOD₅	<2	<2	<2
TOC	2	3	2
Ammonia-nitrogen	0.22	0.06	<0.01
TKN	0.4	0.4	0.6
Nitrate	0.03	<0.01	0.06
Sulphate	7	4	2
Sulphite	<2	<2	<2
Phosphate	0.0	0.0	0.01
Chloride	8	7	6
Sodium	9170	8590	6750
Mg	500	470	540
Ca	3720	3460	3340
K	720	570	830
Fe	480	660	570
Ni	<1	<1	<1
Zn	19	<10	13
Mn	70	84	34
Cu	2.0	2.0	1
Pb	<1	<1	1
Cd	<0.2	<0.2	<0.2
Coliform Count	420	40000	220
Oil and Grease	<5	<5	<5

Table 5-4 Summary of Impact Surface Water Monitoring Results at WM2

Monitoring Parameter(s)	Monitoring Station WM2
	Monitoring Results			Action Level	Limit Level
	Apr 2023	May 2023	Jun 2023	Action Level	Limit Level
pH	7.3	7.3	7.2	>7.6	>7.7
Electrical Conductivity in μS/cm	147	212	142	---	---
DO in mg/L	6.7	8.1	6.8	<5	<4
Turbidity in NTU	64.3	30.6	142.5	>108.3	>108.9
SS in mg/L	48.1	34.2	83.2	>94.5	>94.7
Alkalinity	48	58	35	---
COD	15	13	14
BOD₅	2.0	3.0	<2
TOC	2	5	2
Ammonia-nitrogen	<0.01	0.39	0.14
TKN	0.7	0.8	0.8
Nitrate	0.14	0.03	0.32
Sulphate	9	8	17
Sulphite	<2	<2	<2
Phosphate	<0.01	<0.01	<0.01
Chloride	7	15	11
Sodium	7890	11800	6830
Mg	1370	1420	1560
Ca	15400	18600	18600
K	3410	3900	3050
Fe	9240	8990	3850
Ni	2	1	12.0
Zn	35	26	51
Mn	2220	2370	509
Cu	4	3	6
Pb	4	3	11
Cd	<0.2	<0.2	<0.2
Coliform Count	330	1500	4200
Oil and Grease	<5	<5	<5

5.2.3.2 No exceedance of Action Levels of surface water monitoring was recorded during the reporting period. 1 turbidity exceedance of Limit Levels of surface water quality at WM2 was recorded during the reporting period. The investigation results will be presented when the investigation of limit level exceedance of surface water quality is finished.

5.2.3.3 The Summary of Impact Surface Water Quality Exceedance are shown in Table 5-5. The Notification of Environmental Quality Limits Exceedances will be presented in the report after the investigation.

Table 5-5 Summary of Impact Surface Water Quality Exceedance during the reporting period

Water Quality Monitoring Station	Parameter	pH	DO	Turbidity	SS	Exceedance Count
Water Quality Monitoring Station	Level Exceedance	pH	DO	Turbidity	SS	Exceedance Count
WM1	Action	0	0	0	0	0
WM1	Limit	0	0	0	0	0
WM2	Action	0	0	0	0	0
WM2	Limit	0	0	1 (21 Jun 23) #	0	1

Remarks:

(1) # The investigation results will be presented in the report after the investigation.

(2) * equal to non-project related

5.2.4 Recommended Mitigation Measure

5.2.4.1 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.

5.2.5 Event and Action Plan

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

6 Waste Management

2.1

6.1 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 G.

6.2 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 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.

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.

7.2.4 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.

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

7.2.6 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 and the Layout of LFG monitoring locations is presented in Figure 3.

Table 7-1 Locations of LFG Monitoring during reporting period

Monitoring Period	Monitoring Location	Type of works
Apr to Jun 2023	Portion A +55 mpD to 70 mpD Platform	Excavation Works

7.3 Monitoring Results

7.3.1 The LFG monitoring was conducted at Portion A +55 mpD to 70 mpD Platform (Conducted on working days) from April to June 2023. The LFG monitoring results are summarized in Table 7-2.

Table 7-2 Summary of LFG Monitoring Results

LFG Monitoring Station	Monitoring Date	Monitoring Parameter(s)
		CH₄ in %	LEL in %/v	CO₂ in %	O₂ in %
		Average Monitoring Results (Range)
Portion A +55 mpD to 70 mpD Platform	Apr 2023	0	0	0	20.2 (20.1 – 20.4)
	May 2023	0	0	0	20.2 (20.1 – 20.3)
	Jun 2023	0	0	0	20.2 (20.1 – 20.3)
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.

7.3.2 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 F.

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

7.4 Recommended Mitigation Measures

7.4.1 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.

7.5 Event and Action Plan (EAP)

7.5.1 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.

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 H.

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 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 22 August 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 permanent 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 permanent fencing locations are shown in Appendix I. 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 19 April, 17 May & 7 June 2023 based on the requirement of the approved Revised Translocation Proposal for the Endemic Freshwater Crab Somanniathelphusa zanklon. The 9^th to 11^th Post-Translocation Monitoring Reports (April to June 2023) presents the details of requirements, monitoring results and site inspection with photos. During the reporting period, no S. zanklon individual is identified.

10.1.2 The post-transplantation monitoring was conducted on 21 April, 12 May & 16 June 2023 based on the requirement of the approved Transplantation Proposal for Plant Species of Conservation Importance (Rev.1). The 9^th to 11^th Post-transplantation Monitoring and Audit Reports (21^st April to 16^th June 2023) present the details of requirements, monitoring results and site inspection with photos. 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/ep-submissions/.

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
	6^th (Jan 2023)	30 Jan 2023
	7^th (Feb 2023)	24 Feb 2023
	8^th (Mar 2023)	20 Mar 2023
	9^th (Apr 2023)	19 Apr 2023
	10^th (May 2023)	17 May 2023
	11^th (Jun 2023)	7 Jun 2023
Post-transplantation Monitoring	1^st	24 Nov 2022
	2^nd	9 Dec 2022
	3^rd	21 Dec 2022
	4^th	13 Jan 2023
	5^th	26 Jan 2023
	6^th	8 Feb 2023
	7^th	24 Feb 2023
	8^th	20 Mar 2023
	9^th	21 Apr 2023
	10^th	12 May 2023
	11^th	16 Jun 2023

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 Total 13 weekly environmental site inspections were conducted during the reporting period. 4 of them were the joint environmental site inspections with the representatives of the ER, the Contractor, IEC and the ET. There was no noncompliance recorded during the site inspections.

11.1.3 Details of observations and recommendations are summarized in Table 11-1.

Table 11-1 Observations and Recommendations of Site Audit

Parameter	Date	Observation and Reminders	Follow-up Action Taken
Air Quality	17 Apr 2023	Reminder: The Contractor was reminded to spray water on the surface of dusty material in SBA to prevent dust dispersion.	The Contractor was reminded that dusty material shall be sprayed with water to prevent generation of dust.
	2 May 2023	Observation: Sand and silt were observed at the road leading to SBA.	The contractor was recommended that road surface shall be kept clear of sand and silt.
	2 May 2023	Reminder: Dust suppression measure shall be enhanced to cover all work area and dusty stockpiles in SBA.	The contractor was reminded to ensure the implementation of dust suppression measure for the dry work area and dusty stockpile.
	15 May 2023	Observation: The accumulate of the uprooting of trees without covered entirely by impervious sheeting or placed in an area sheltered on the top and the 3 sides were found at the work area at SBA.	The contractor was recommended that the demolished trees should be covered by impervious sheeting or placed in an area sheltered on the top and the 3 sides.
	22 May 2023	Observation: The unrooting trees at Portion A was not covered by impervious sheeting and or placed in an area sheltered on the top and the 3 sides within a day of demolition.	The contractor was recommended that all demolished items (including trees) should be covered entirely by impervious sheeting or placed in an area sheltered on the top and the 3 sides within a day of demolition.
	29 May 2023	Observation: Portion of road leading to Portion A and Portion B2 shall be kept clear of dusty and muddy materials.	The Contractor was reminded to clear dusty and muddy material on the portion of road leading to Portion A and Portion B2.
	29 May 2023	Observation: The accumulated uprooting trees is found behind the silt removal facilities in Portion B2.	The accumulated uprooting trees shall be covered with impervious sheets, placed in an area sheltered on the top and the 3 sides or disposed properly.
	12 Jun 2023	Observation: Watering shall be scheduled in Portion A under hot weather.	The Contractor was recommended to schedule watering in Portion A.

Parameter	Date	Observation and Reminders	Follow-up Action Taken
Air Quality	26 Jun 2023	Reminder: The unpaved assess road was dry.	The contractor was reminded to increase the frequency of watering at the Portion A.
Noise	No specific observation was identified in the reporting period.
Water Quality	3 Apr 2023	Observation: The exposed surface in Portion E3-1 shall be covered with impervious sheets to minimize surface runoff into the stream.	The contractor was recommended that surface protection shall be implemented on the exposed slope to minimize surface runoff.
	3 Apr 2023	Reminder: The Contractor was reminded to maintain surface protection work in Portion A.	The contractor was reminded that surface protection shall be implemented on the exposed slope to minimize surface runoff.
	3 Apr 2023	Reminder: The contractor was reminded to ensure the silt removal facilities functioning properly before the holidays.	The contractor was reminded silt removal facilities shall be maintained regularly.
	11 Apr 2023	Observation: The entrance of Portion A was observed muddy. The entrance shall be kept clear of dusty and muddy material.	The Contractor was recommended to repave the surface of entrance to prevent accumulation of sand and silt.
	11 Apr 2023	Observation: Surface protection shall be applied on the exposed slope behind the WetSep to minimize the surface runoff into the channel.	The contractor was recommended that the exposed slope shall be covered with impervious sheets to prevent any surface runoff into the channel.
	17 Apr 2023	Reminder: The Contractor was reminded to ensure all silt removal facilities functioning properly for the upcoming rainfall.	The Contractor was reminded that silt removal facilities shall be maintained properly.
	24 Apr 2023	Observation: The channels at the entrance of SBA are accumulated with rotten leaves, sand and silt.	The contractor was recommended that regular cleaning of channel shall be conducted to prevent any clogging.
	24 Apr 2023	Reminder: Surface protection works in Portion A shall be maintained properly.	The contractor was recommended that earth bunds and exposed slopes shall be paved to control the surface runoff.
	24 Apr 2023	Reminder: The Contractor has been reminded to ensure all silt removal facilities functioning properly for the upcoming rainfall in this week.	Silt removal facilities shall be maintained properly and checked if they can function properly.

Parameter	Date	Observation and Reminders	Follow-up Action Taken
Water Quality	8 May 2023	Observation: Accumulated sand and silt shall be cleared off in the wheel washing bay in SBA.	The contractor was recommended to conduct regularly cleaning work for the wheel washing bay and to ensure the implementation of vehicle washing in SBA.
	8 May 2023	Reminder: The contractor was reminded to ensure all silt removal facilities functioning properly for the upcoming rainfall and the discharged wastewater shall comply with WPCO requirement.	The construction and surface runoff shall be directed to silt removal facilities and treated wastewater shall fulfil WPCO requirement.
	15 May 2023	Observation: The accumulate water was found at the lower area at the Portion D.	The contractor was recommended that the surface water should be collected to silt removal facilities.
	22 May 2023	Observation: The sand and soil near the channel at Portion E3-1 were found.	The contractor was recommended to avoid the untreated surface runoff contaminated with related materials discharged to channel directly. All construction runoffs should be collected to silt removal facilities for treatment.
	29 May 2023	Observation: Slope protection work in Portion A shall be maintained properly to minimize dust dispersion and surface runoff.	The Contractor was recommended to apply surface protection on the exposed slope in Portion A.
	5 Jun 2023	Reminder: The contractor was reminded that the particular attention should be paid to the control of silty surface runoff during storm event in accordance with Appendix A2 of ProPECC PN 1/94.	The contractor was reminded that the particular attention should be paid to the control of silty surface runoff during storm event in accordance with Appendix A2 of ProPECC PN 1/94.
	12 Jun 2023	Reminder: The Contractor was reminded to ensure channel and silt removal facilities shall be functioning properly for the upcoming rainfall.	Silt removal facility and channel shall be maintained properly.
	19 Jun 2023	Reminder: The Contractor was reminded to ensure silt removal facilities shall be functioning properly for the upcoming rainfall. Silt removal facility shall be functioning properly to ensure sufficient treatment for all wastewater before discharging to comply with WPCO.	The Contractor was reminded to ensure silt removal facilities shall be functioning properly for the upcoming rainfall. Silt removal facility shall be functioning properly to ensure sufficient treatment for all wastewater before discharging to comply with WPCO.

Parameter	Date	Observation and Reminders	Follow-up Action Taken
Water Quality	19 Jun 2023	Reminder: The Contractor was reminded that the bunding along the slope edge shall be properly maintained to prevent surface runoff during heavy rainfall at Portion A. Earth bund in Portion A shall be properly maintained.	The Contractor was reminded that the bunding along the slope edge shall be properly maintained to prevent surface runoff during heavy rainfall at Portion A. Earth bund in Portion A shall be properly maintained.
Water Quality	26 Jun 2023	Observation: The sediment at the drainage system and site boundary, especially at the lower elevations should be kept cleaning regularly. (Most of sediment was found at the lower elevations of Portion A). The contractor should ensure no untreated construction runoff discharging directly outside the site boundary of the project.	The contractor was recommended that the sediment at the drainage system and site boundary, especially at the lower elevations should be kept cleaning regularly.
Waste and Chemical Management	11 Apr 2023	Observation: The drip tray was filled with water.	The Contractor was recommended to clear the drip tray and to minimize the number of chemical containers in the outdoor environment.
	17 Apr 2023	Observation: The drip tray in SBA was filled with water.	The Contractor was recommended to clear the drip tray.
	2 May 2023	Observation: Water in the drip tray shall be cleared off at Portion A.	The contractor was recommended to collect and dispose of any stagnant water accumulated in the drip trays and handle them as chemical waste.
	8 May 2023	Reminder: The contractor was reminded to cover the waste skip with impervious sheets during and rainfall, to avoid accumulation of waste and to implement waste sorting.	The contractor was reminded to cover the waste skip with impervious sheets during and rainfall, to avoid accumulation of waste and to implement waste sorting.
	15 May 2023	Observation: Accumulate water in drip tray was observed at Portion D.	The contractor was recommended to keep cleaning the accumulated water in drip tray to minimize the large amount of potential chemical waste when the chemical leakage was found.
	05 Jun 2023	Observation: The accumulate water was found the drip tray at Portion D.	The contractor was recommended that the accumulate water in drip tray should be cleared regularly and after rainy to minimize the potential chemical waste.

Parameter	Date	Observation and Reminders	Follow-up Action Taken
Waste and Chemical Management	12 Jun 2023	Observation: The stagnant water and silt in the drip trays shall be clear off in Portion B2 and SBA.	The Contractor was recommended to clear drip trays.
Waste and Chemical Management	26 Jun 2023	Observation: The accumulate water at the drip tray near Portion E2 was found.	The contractor was recommended that the accumulate water at the drip tray near Portion E2 should be cleaned after the rainy to minimize the potential chemical waste.
Landscape and Visual Impact	No specific observation was identified in the reporting period.
Permit / Licenses	No specific observation was identified in the reporting period.

11.1.4 Environmental Protection Department-Regional Office (North) conducted general site inspection on 12 June 2023. No special findings were identified during the inspection. 1 additional site inspection on 21 June 2023 for the Environmental Complaint received on 14 June 2023 & the Environmental Enquiry received on 15 June 2023 was conducted with EPD-RNG, ER, IC, IEC ET & Contractor.

12 Environmental Non-conformance

11.1

12.1 Summary of Monitoring Exceedance

Air Quality, Noise & Landfill Gas Monitoring

12.1.1 No Action / Limit Level exceedance impact monitoring was recorded at designated monitoring stations during the reporting period.

12.1.2 The Summary of Impact 1-hr & 24-hr TSP Exceedance are shown in Table 12-1.

Table 12-1 Summary of Impact 1-hr & 24-hr TSP Exceedance during the reporting period

Dust Monitoring Station	Parameter	1-hr TSP	Exceedance Count	Accumulate of project	24-hr TSP	Exceedance Count	Accumulate of project
Dust Monitoring Station	Level Exceedance	1-hr TSP	Exceedance Count	Accumulate of project	24-hr TSP	Exceedance Count	Accumulate of project
AM1	Action	0	0	0	0	0	2*
AM1	Limit	0	0	0	0	0	3*
AM2	Action	0	0	0	0	0	0
AM2	Limit	0	0	0	0	0	0
AM3	Action	0	0	0	0	0	4*
AM3	Limit	0	0	0	0	0	3*

Remarks: * equal to non-project related

Surface Water Quality Monitoring

12.1.3 No exceedance of the Action Levels was recorded at designated monitoring stations during the reporting period. 1 Turbidity exceedance of the Limit Level for surface water quality was recorded at WM2 during the reporting period. The investigation results will be presented when the investigation of limit level exceedance of surface water quality is finished.

12.1.4 The Summary of Impact Surface Water Quality Exceedance are shown in Table 12-2

Table 12-2 Summary of Impact Surface Water Quality Exceedance during the reporting period

Water Quality Monitoring Station	Parameter	pH	DO	Turbidity	SS	Exceedance Count
Water Quality Monitoring Station	Level Exceedance	pH	DO	Turbidity	SS	Exceedance Count
WM1	Action	0	0	0	0	0
WM1	Limit	0	0	0	0	0
WM2	Action	0	0	0	0	0
WM2	Limit	0	0	1 (21 Jun 23) #	0	1

Remarks:

(1) # The investigation results will be presented in the report after the investigation.

(2) * equal to non-project related

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 No environmental complaint was recorded from April to May 2023.

12.3.2 1 complaint & 1 enquiry received from EPD-RNG on 14 & 15 June 2023 were recorded on June 2023. The related complaint and enquiry are investigating by related parties in accordance with the requirement of EM&A Manual.

Environmental Complaint on 14 June 2023

12.3.3 The complaint about the water aspect was received by ET on 14 June 2023 at 12:08 via EPD-RNG email. The main content of the complaint mentioned the muddy water was observed at Lin Ma Hang International Bridge on 30 May 2023. The related investigation results will be presented when the investigation was finished.

Environmental Enquiry on 15 June 2023

12.3.4 The enquiry about the water aspect was received by ET on 15 June 2023 at 15:18 via EPD-RNG email. The main content of the enquiry mentioned the muddy water was observed at River Ganges (GR3) (Water Quality Monitoring Point from EPD). The related investigation results will be presented when the investigation was finished.

12.3.5 The cumulative statistics on environmental complaints are presented in Table 12-1.

Table 12-1 Cumulative Statistics on Environmental Complaints

Reporting Period	Environmental Aspects					No. of Environmental Complaints
Reporting Period	Air Quality	Noise	Water Quality	Waste	Ecology	No. of Environmental Complaints
Apr 2023	0	0	0	0	0	0
May 2023	0	0	0	0	0	0
Jun 2023	0	0	1^#	0	0	0
Total	0	0	1^#	0	0	0
Accumulate of project	1*	0	1^#	0	0	1* & 1^#

Remarks:

(1) * equal to non-project related after the investigation

(2) # equal to the investigation results will be presented in the report after the investigation.

12.3.6 Cumulative complaint / enquiry log, Summaries of complaints and enquiries & Environmental complaint reports are presented in Appendix J. The investigation results will be presented when the investigation was finished.

12.4 Summary of Environmental Summons and Successful Prosecution

12.4.1 No summons and prosecution were 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 implemented mitigation measures are considered effective. The implementation status during the reporting period is summarized in Appendix H.

14 Conclusion

14.1.1 1-hr & 24-hr TSP impact monitoring was carried out in the reporting month. No Action / Limit Level exceedance for 1-hr & 24-hr TSP impact monitoring at AM1, AM2 & AM3 was recorded during the period.

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

14.1.3 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. No groundwater monitoring is required before the completion of site formation work of the landfilling area.

14.1.4 Surface water monitoring was carried out in the reporting month. No exceedance of the Action Levels was recorded at designated monitoring stations during the reporting period. 1 Turbidity exceedance of the Limit Level for surface water quality was recorded at WM2 during the reporting period. The investigation results will be presented when the investigation of limit level exceedance of surface water quality is finished.

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

14.1.6 In terms of cultural heritage, implementation of the mitigation measures such as permanent 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.

14.1.7 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.

14.1.8 13 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.

14.1.9 No environmental complaint was recorded from April to May 2023.

14.1.10 1 complaint & 1 enquiry received from EPD-RNG on 14 & 15 June 2023 were recorded on June 2023. The related complaint and enquiry are investigating by related parties in accordance with the requirement of EM&A Manual.

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

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

Comment and Recommendations

14.1.13 The recommended environmental mitigation measures, as proposed in the EIA reports and EM&A Manuals shall be effectively implemented to minimize the potential environmental impacts from the Project. The EM&A programme would effectively monitor the environmental impacts generated from the construction activities and ensure the proper implementation of mitigation measures.

14.1.14 According to the environmental audit performed in the reporting period, the following recommendations were made:

Air Quality Impact

• The Contractor was reminded that dusty material shall be sprayed with water to prevent generation of dust.

• The contractor was recommended that road surface shall be kept clear of sand and silt.

• The contractor was reminded to ensure the implementation of dust suppression measure for the dry work area and dusty stockpile.

• The contractor was recommended that all demolished items (including trees) should be covered entirely by impervious sheeting or placed in an area sheltered on the top and the 3 sides within a day of demolition.

Construction Noise Impact

• No specific observation was identified in the reporting month.

Water Quality Impact

• The contractor was recommended that surface protection shall be implemented on the exposed slope to minimize surface runoff.

• The Contractor was recommended to repave the surface of entrance to prevent accumulation of sand and silt.

• The contractor was recommended that regular cleaning of channel shall be conducted to prevent any clogging.

• The contractor was recommended to conduct regularly cleaning work for the wheel washing bay and to ensure the implementation of vehicle washing in SBA.

• The Contractor was reminded that the bunding along the slope edge shall be properly maintained to prevent surface runoff during heavy rainfall at Portion A. Earth bund in Portion A shall be properly maintained.

• The contractor was recommended that the sediment at the drainage system and site boundary, especially at the lower elevations should be kept cleaning regularly.

• The Contractor was reminded to ensure silt removal facilities shall be functioning properly for the upcoming rainfall. Silt removal facility shall be functioning properly to ensure sufficient treatment for all wastewater before discharging to comply with WPCO.

• The construction and surface runoff shall be directed to silt removal facilities and treated wastewater shall fulfil WPCO requirement.

• The contractor was recommended to avoid the untreated surface runoff contaminated with related materials discharged to channel directly. All construction runoffs should be collected to silt removal facilities for treatment.

• The contractor was reminded that the particular attention should be paid to the control of silty surface runoff during storm event in accordance with Appendix A2 of ProPECC PN 1/94.

Waste and Chemical Management

• The contractor was recommended to keep cleaning the accumulated water in drip tray to minimize the large amount of potential chemical waste when the chemical leakage was found.

• The Contractor was recommended to minimize the number of chemical containers in the outdoor environment.

• The contractor was reminded to cover the waste skip with impervious sheets during and rainfall, to avoid accumulation of waste and to implement waste sorting.

Landscape and Visual Impact

• No specific observation was identified in the reporting month.

Permit / Licenses

• No specific observation was identified in the reporting period.

14.1.15 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 implemented mitigation measures are considered effective.

14.1.16 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

Noise Monitoring Station	Average Leq, 30min, dB(A) (Range)			Action Level	Limit Level
	Apr 2023	May 2023	Jun 2023
NM1a	56.8 (53.7 – 58.4)	57.4 (47.6 – 61.0)	58.6 (53.5 – 61.5)	When one documented complaint is received	>75dB(A)
NM2a	60.1 (52.8 – 65.4)	55.8 (48.4 – 58.0)	53.9 (48.5 – 57.7)

Event	ET	IEC	Contractor
Action level being exceeded by one sampling day	• Repeat in situ measurement to confirm findings • Identify source(s) of impact • Prepare Notification of Exceedance • Inform IEC and Contractor • Check monitoring data, all plant, equipment and Contractor’s working methods • Repeat measurement on next day of exceedance	• Verify Notification of Exceedance • Check monitoring data and Contractor’s working methods	• Rectify unacceptable practice • Amend working methods if appropriate
Action level being exceeded by two or more consecutive sampling days	• Repeat in situ measurement to confirm findings • Identify source(s) of impact • Prepare Notification of Exceedance • Inform IEC and Contractor • Check monitoring data, all plant, equipment and Contractor’s working methods • Discuss with Contractor and IEC for remedial measures • Ensure mitigation measures are implemented • Increase the monitoring frequency to daily until no exceedance of Action level • Repeat measurement on next day of exceedance	• Verify Notification of Exceedance • Check monitoring data and Contractor's working method • Discuss with ET and Contractor on possible remedial actions • Review the proposed mitigation measures • Supervise the implementation of mitigation measures	• Submit proposal of additional mitigation measures to IEC of notification • Implement the agreed mitigation measures • Amend proposal if appropriate
Event	ET	IEC	Contractor
Limit Level being exceeded by one sampling day	• Repeat in situ measurement to confirm findings • Identify source(s) of impact • Prepare Notification of Exceedance • Inform IEC and Contractor; • Check monitoring data, all plant, equipment and Contractor's working methods • Discuss mitigation measures with IEC and Contractor • Ensure mitigation measure are implemented	• Verify Notification of Exceedance • Check monitoring data submitted By ET and Contractor’s working method • Discuss with ET and Contractor on possible remedial actions • Review the proposed mitigation measures • Supervise the implementation of mitigation measures	• Critically review the working method • Rectify unacceptable practice • Take immediate corrective actions to avoid further exceedance • Submit proposal of mitigation measures to IEC • Implement the agreed mitigation measures •
Limit level being exceeded by two or more consecutive sampling days	• Repeat in situ measurement to confirm findings • Identify source(s) of impact • Prepare Notification of Exceedance • Inform IEC, contractor and EPD • Check monitoring data, all plant, equipment and Contractor's working methods • Discuss mitigation measures with IEC and Contractor • Ensure mitigation measure are implemented	• Verify Notification of Exceedance • Check monitoring data submitted by ET and Contractor’s working method • Discuss with ET and Contractor on possible remedial actions • Review the proposed mitigation measures • Supervise the implementation of mitigation measures	• Critically review the working method • Rectify unacceptable practice • Take immediate corrective actions to avoid further exceedance • Submit proposal of mitigation measures to IEC • Implement the agreed mitigation measures • Resubmit proposals if problem still not under control • Slow down or to stop relevant activity until exceedance is abated

Section 1 – Introduction

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

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

Table 3-4 Summary of Impact 24-hr TSP Monitoring Results

Table 3-5 Summary of Impact 1-hr & 24-hr TSP Exceedance

Table 4-1 Noise Monitoring Locations

Table 4-2 Noise Monitoring Parameters, Frequency and Duration

Monitoring Station

Parameter

Frequency and Duration

Table 4-3 Summary of Noise Monitoring Results during normal working hours (07:00-19:00, Monday to Saturday)

Monitoring Station

Location

Coordinates (HK Grid)

Easting

Northing

Parameter

Frequency

Table 5-4 Summary of Impact Surface Water Monitoring Results at WM2

Table 5-5 Summary of Impact Surface Water Quality Exceedance during the reporting period

Table 12-1 Summary of Impact 1-hr & 24-hr TSP Exceedance during the reporting period

Table 12-2 Summary of Impact Surface Water Quality Exceedance during the reporting period

Figure 1	Location of the Project Site
Figure 2	Impact Monitoring Locations
Figure 3	Landfill Gas Monitoring Locations

Appendix A	Construction Programme
Appendix B	Construction Site Activities
Appendix C	Project Organization Chart & Management Structure
Appendix D	Detail Status of FEP & EP Submission
Appendix E	Graphical Presentations
Appendix F	Notification of Environmental Quality Limits Exceedance
Appendix G	Waste Flow Table
Appendix H	Environmental Mitigation Implementation Schedule (EMIS)
Appendix I	Mitigation Measures of Cultural Landscape Features
Appendix J	Cumulative complaint / enquiry log, Summaries of complaints and enquiries & Environmental complaint reports

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