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 Annual EM&A Report presents the EM&A works conducted from 1 December 2022 to 31 December 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	Dec 2022 to Jan 2023	Feb to Aug 2023	Sep to Nov 2023	Dec 2023
- Material loading and unloading, site traffic	✓	✓	✓	✓
- Permanent site office foundation works with pouring of concrete		✓
- Construction of site buildings			✓	✓
- Site clearance	✓	✓	✓	✓
- Installation of permanent fencing	✓	✓	✓	✓
- Site formation	✓	✓	✓	✓
- Tree felling	✓	✓	✓	✓
Shotcreting (Permanent and Temporary)			✓	✓
Soil Nail Installation				✓

Environmental Exceedance

Air Quality (1-hr TSP)

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

Air Quality (24-hr TSP)

2 Action Level Exceedance and 3 Limit Level Exceedance for 24-hr TSP monitoring at AM1 was recorded during the reporting period. The exceedance was considered likely caused by external sources such as the high level of background air quality in Hong Kong during the monitoring period etc and not project related.

No Action / Limit Level exceedance for 24-hr TSP monitoring at AM2 was recorded during the period.

4 Action Level Exceedance and 3 Limit Level Exceedance for 24-hr TSP monitoring at AM3 was recorded during the reporting period. The exceedance was considered likely caused by external sources such as the high level of background air quality in Hong Kong during the monitoring period etc and not project related.

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 Action and Limit Levels of surface water monitoring was recorded from December 2022 to March 2023.

No exceedance of Action Levels of surface water monitoring was recorded from April to June 2023.

No exceedance of Limit Level of surface water monitoring at WM1 was recorded from April to June 2023.

1 turbidity exceedance of Limit Levels of surface water quality at WM2 was recorded from April to June 2023. After the investigation, the exceedance may involve the construction runoff of the project. The rectification actions are conducted by the contractor in progress. The rectification works should be achieved minimization the potential risk of causing high concentration of construction runoff, enhancement of maintenance of Temporary Surface Water Drainage System (TSWDS), enhancement of the effectiveness and treatment capacity of the TSWDS & enhancement of temporary landscape treatment as green cover and minimization the potential risk of causing high concentration of construction runoff.

No exceedance of the Action and Levels was recorded at designated monitoring stations in July 2023.

1 DO exceedance of the Action Level at WM1 was recorded in August 2023. In summary of the investigation, the DO exceedance in Action Level at WM1 may involve the vary of temperature under the hot weather. Therefore, the exceedance is not related to project. No exceedance of Limit Level at WM1 was recorded in August 2023.

No exceedance of the Action and Limit Levels at WM2 were recorded in August 2023.

No exceedance of the Action and Levels at designated monitoring stations was recorded from September to December 2023.

Environmental Non-conformance/Complaint/Summons and Prosecution

1 warning regarding suspected non-compliance event with Condition 1.7 and 2.15(a) of the EP & Condition 1.7 and 2.13(a) of the FEP-01 & FEP-02 was recorded during the reporting period. The related rectified actions are being taken in progress by the contractor.

6 complaints (1 complaint regarding air quality and 5 complaints regarding water quality) were recorded during the reporting period. The related rectified actions are conducted by the contractor as soon as possible.

No summons/prosecutions were recorded and received in this reporting period.

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. Another further of EP (FEP-02/292/2007) was subsequently granted on 23 August 2023.

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, Annual EM&A report should be submitted to the Director of Environmental Protection (DEP) within 10 working days after the end of the reporting year. 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 Annual 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 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	Dec 2022 to Jan 2023	Feb to Aug 2023	Sep to Nov 2023	Dec 2023
- Material loading and unloading, site traffic	✓	✓	✓	✓
- Permanent site office foundation works with pouring of concrete		✓
- Construction of site buildings			✓	✓
- Site clearance	✓	✓	✓	✓
- Installation of permanent fencing	✓	✓	✓	✓
- Site formation	✓	✓	✓	✓
- Tree felling	✓	✓	✓	✓
Shotcreting (Permanent and Temporary)			✓	✓
Soil Nail Installation				✓

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 Hong Kong Holding Ltd.)	Mr. Matt Choy	2902 5296
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
2.8	2.10	Submission of Translocation Report and Post-Translocation Monitoring	Translocation was carried out and the report submitted.
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	Submitted

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-01/292/2007	Throughout the Contract	Permit granted on 28 April 2022
Further Environmental Permit (FEP)	FEP-02/292/2007	Throughout the Contract	Permit granted on23 August 2023
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-RN1151-22	28 February 2023	Approved on 29 November 2022 (cancelled with effect from 14 February 2023)
	GW-RN0131-23	13 May 2023	Approved on 9 February 2023 (Cancelled with effect from 23 March 2023)
	GW-RN0299-23	22 June 2023	Approved on 21 March 2023
	GW-RN0619-23	22 September 2023	Permit granted on 16 June 2023
	GW-RN1012-23	22 December 2023	Permit granted on 22 September 2023 (Replaced CNP No. GW-RN0619-23)
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

Month	Average 1-hr TSP Concentration, µg/m³ (Range)
	Dust Monitoring Station
	AM1	AM2	AM3
Dec 2022	54 (44 – 65)	54 (45 – 61)	63 (57 – 68)
Jan 2023	49 (34 – 60)	42 (32 – 53)	52 (39 – 67)
Feb 2023	27 (18 – 41)	28 (20 – 43)	33 (21 – 51)
Mar 2023	45 (22 – 67)	49 (31 – 65)	47 (15 – 68)
Apr 2023	35 (19 – 55)	42 (31 – 76)	40 (23 – 54)
May 2023	23 (15 – 40)	30 (15 – 43)	35 (26 – 49)
Jun 2023	28 (15 – 38)	31 (21 – 45)	33 (21 – 45)
Jul 2023	35 (21 – 46)	34 (21 – 48)	32 (21 – 44)
Aug 2023	33 (20 – 40)	35 (29 – 40)	39 (29 – 50)
Sep 2023	44 (36 – 54)	39 (36 – 42)	45 (36 – 53)
Oct 2023	31 (21 – 40)	42 (34 – 52)	46 (32 – 60)
Nov 2023	28 (22 – 36)	34 (30 – 39)	37 (30 – 43)
Dec 2023	29 (26 – 34)	37 (23 – 59)	51 (40 – 67)
Action Level	>285	>279	>285
Limit Level	>500

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

Month	Average 24-hr TSP Concentration, µg/m³ (Range)
	Dust Monitoring Station
	AM1	AM2	AM3
Dec 2022	114 (88 – 147)	65 (43 – 92)	140 (126 – 157)
Jan 2023	98 (60 – 133)	53 (21 – 79)	85 (56 – 134)
Feb 2023	145 (62 – 286)	89 (61 – 126)	181 (93 – 284)
Mar 2023	184 (30 – 490)	78 (29 – 152)	162 (35 – 337)
Apr 2023	60 (34 – 112)	63 (37 – 111)	70 (40 – 151)
May 2023	62 (28 – 106)	73 (53 – 87)	93 (29 – 121)
Jun 2023	47 (28 – 95)	41 (32 – 54)	82 (43 – 130)
Jul 2023	36 (17 – 60)	34 (25 – 48)	30 (22 – 40)
Aug 2023	29 (19 – 37)	33 (27 – 43)	40 (27 – 63)
Sep 2023	40 (32 – 48)	41 (30 – 53)	51 (36 – 67)
Oct 2023	70 (62 – 77)	55 (43 – 77)	70 (61 – 78)
Nov 2023	112 (101 – 128)	89 (70 – 110)	101 (88 – 117)
Dec 2023	97 (71 – 108)	81 (65 – 119)	91 (70 – 122)
Action Level	>164	>152	>163
Limit Level	>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		AM1		AM2		AM3
Level Exceedance Parameters		Action Level	Limit Level	Action Level	Limit Level	Action Level	Limit Level
1-hr TSP	Exceedance Date	-	-	-	-	-	-
1-hr TSP	Exceedance Count	0	0	0	0	0	0
24-hr TSP	Exceedance Date	1 Mar 23* 3 Mar 23*	24 Feb 23* 2 Mar 23* 4 Mar 23*	-	-	18 Feb 23* 3 Mar 23* 4 Mar 23* 8 Mar 23*	24 Feb 23* 1 Mar 23* 2 Mar 23*
24-hr TSP	Exceedance Count	2	3	0	0	4	3

Remarks: * equal to non-project related

3.1.3.3 No Action / Limit Level exceedance for 1-hr TSP impact monitoring at AM1, AM2 & AM3 was recorded during the reporting period.

3.1.3.4 2 Action Level Exceedance and 3 Limit Level Exceedance for 24-hr TSP monitoring at AM1 was recorded during the reporting period. The exceedance was considered likely caused by external sources such as the high level of background air quality in Hong Kong during the monitoring period etc and not project related. The Notification of Environmental Quality Limits Exceedances are presented in Appendix F.

3.1.3.5 No Action / Limit Level exceedance for 24-hr TSP monitoring at AM2 was recorded during the period.

3.1.3.6 4 Action Level Exceedance and 3 Limit Level Exceedance for 24-hr TSP monitoring at AM3 was recorded during the reporting period. The exceedance was considered likely caused by external sources such as the high level of background air quality in Hong Kong during the monitoring period etc and not project related. 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 Impact surface water monitoring was carried out at WM1 and WM2. Additional surface water monitoring was carried out at WM2 and GR3 (EPD Monitoring Location) on 28 September 2023. 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 monitoring are summarized in Table 5-2. The additional parameters, frequency and duration of surface water quality monitoring are summarized in Table 5-3.

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
GR3*	Ping Yuen River	835361	844134

Remarks:

“*” The monitoring location only conducted based on the environmental complaint.

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

Table 5-3 Additional surface water quality monitoring Parameters, Frequency and Duration

Parameter	Frequency
pH, Electrical conductivity, DO, Turbidity, SS, COD, BOD5, Ammonia-nitrogen, Chloride, Fe, Zn, and Coliform Count	Based on the case of Environmental Complaint

5.2.3 Monitoring Results

5.2.3.1 The summary of monitoring results is presented in Table 5-4, Table 5-5 & Table 5-6. 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 5-4 Summary of Impact Surface Water Monitoring Results at WM1

Monitoring Parameter(s)	Monitoring Station WM1
	Monitoring Results				Action Level	Limit Level
	Dec 2022	Jan 2023	Feb 2023	Mar 2023	Action Level	Limit Level
pH	7.4	7.1	7.4	7.1	>7.7	>7.8
DO in mg/L	10.8	10.5	7.7	7.6	<7.4	<4
Turbidity in NTU	8.6	6.6	5.0	6.3	>9.2	>9.5
Electrical Conductivity in μS/cm	58	51	83	63	---	---
SS in mg/L	3.4	7.1	3.4	2.1	>9.7	>11.4
Alkalinity in mg/L	16	16	16	14	---
COD in mg/L	<5	5.0	<5	6
BOD₅in mg/L	<2	<2	<2	<2
TOC in mg/L	3	3	3	2
Ammonia-nitrogen in mg/L	0.02	0.02	0.11	0.06
TKN in mg/L	0.2	0.1	0.4	0.3
Nitrate in mg/L	0.01	0.02	0.02	0.01
Sulphate in mg/L	3	3	5	7
Sulphite in mg/L	<2	<2	<2	<2
Phosphorus as P in mg/L	0.01	<0.01	<0.01	0.02
Chloride in mg/L	6	5	6	6
Sodium in µg/L	8540	7830	8390	7960
Mg in µg/L	410	440	420	440
Ca in µg/L	3180	3030	3100	3280
K in µg/L	290	290	550	400
Fe in µg/L	660	660	490	1310
Ni in µg/L	<1	<1	3.0	<1
Zn in µg/L	<10	<10	11.0	<10
Mn in µg/L	42	55	57	106
Cu in µg/L	<1	<1	1.0	<1
Pb in µg/L	<1	<1	<1	<1
Cd in µg/L	<0.2	<0.2	<0.2	<0.2
Coliform Count in CFU/100mL	Not detected	26	24	Not Detected
Oil and Grease in mg/L	<5	<5	<5	<5

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
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
Electrical Conductivity in μS/cm	64	69	73	---	---
SS in mg/L	3.2	3.3	6.6	>9.7	>11.4
Alkalinity in mg/L	13	18	15	---
COD in mg/L	17	10	9
BOD₅in mg/L	<2	<2	<2
TOC in mg/L	2	3	2
Ammonia-nitrogen in mg/L	0.22	0.06	<0.01
TKN in mg/L	0.4	0.4	0.6
Nitrate in mg/L	0.03	<0.01	0.06
Sulphate in mg/L	7	4	2
Sulphite in mg/L	<2	<2	<2
Phosphorus as P in mg/L	0.0	0.0	0.01
Chloride in mg/L	8	7	6
Sodium in µg/L	9170	8590	6750
Mg in µg/L	500	470	540
Ca in µg/L	3720	3460	3340
K in µg/L	720	570	830
Fe in µg/L	480	660	570
Ni in µg/L	<1	<1	<1
Zn in µg/L	19	<10	13
Mn in µg/L	70	84	34
Cu in µg/L	2.0	2.0	1
Pb in µg/L	<1	<1	1
Cd in µg/L	<0.2	<0.2	<0.2
Coliform Count in CFU/100mL	420	40000	220
Oil and Grease in mg/L	<5	<5	<5

Monitoring Parameter(s)	Monitoring Station WM1
	Monitoring Results			Action Level	Limit Level
	Jul 2023	Aug 2023	Sep 2023	Action Level	Limit Level
pH	7.2	6.7	7.2	>7.7	>7.8
DO in mg/L	7.5	6.5	7.8	<7.4	<4
Turbidity in NTU	6.1	7.4	4.3	>9.2	>9.5
Electrical Conductivity in μS/cm	99	68	47	---	---
SS in mg/L	2.0	7.2	3.0	>9.7	>11.4
Alkalinity in mg/L	18	19	11	---
COD in mg/L	12	6	9
BOD₅in mg/L	<2	<2	<2
TOC in mg/L	3	<1	2
Ammonia-nitrogen in mg/L	0.03	0.02	0.04
TKN in mg/L	0.4	0.2	0.4
Nitrate in mg/L	0.53	0.05	0.05
Sulphate in mg/L	7	2	4
Sulphite in mg/L	<2	<2	<2
Phosphorus as P in mg/L	0.01	<0.01	0.02
Chloride in mg/L	7	5	6
Sodium in µg/L	8350	7740	6340
Mg in µg/L	660	560	430
Ca in µg/L	19400	3740	<0.2
K in µg/L	690	460	680
Fe in µg/L	780	780	270
Ni in µg/L	<1	<1	<1
Zn in µg/L	72	15	14
Mn in µg/L	72	46	32
Cu in µg/L	2.0	<1	1
Pb in µg/L	<1	<1	<1
Cd in µg/L	<0.2	<0.2	<0.2
Coliform Count in CFU/100mL	56	68	240
Oil and Grease in mg/L	<5	<5	<5

Monitoring Parameter(s)	Monitoring Station WM1
	Monitoring Results			Action Level	Limit Level
	Oct 2023	Nov 2023	Dec 2023	Action Level	Limit Level
pH	7.4	7.6	7.6	>7.7	>7.8
DO in mg/L	7.9	7.5	7.6	<7.4	<4
Turbidity in NTU	6.6	5.1	5.8	>9.2	>9.5
Electrical Conductivity in μS/cm	51	59	95	---	---
SS in mg/L	4.0	2.5	9.5	>9.7	>11.4
Alkalinity in mg/L	14	17	16	---
COD in mg/L	21	7	7
BOD₅in mg/L	<2	<2	<2
TOC in mg/L	2	2	<1
Ammonia-nitrogen in mg/L	0.08	0.07	0.03
TKN in mg/L	0.3	0.5	0.2
Nitrate in mg/L	0.06	0.05	0.03
Sulphate in mg/L	<1	<1	3
Sulphite in mg/L	<2	<2	<2
Phosphorus as P in mg/L	0.01	0.0	0.0
Chloride in mg/L	6	6	6
Sodium in µg/L	6790	8120	8380
Mg in µg/L	450	480	500
Ca in µg/L	2850	3330	3290
K in µg/L	530	600	400
Fe in µg/L	330	420	930
Ni in µg/L	<1	<1	1.0
Zn in µg/L	10	13	<10
Mn in µg/L	28	41	57
Cu in µg/L	<1	2.0	<1
Pb in µg/L	<1	<1	<1
Cd in µg/L	<0.2	<0.2	<0.2
Coliform Count in CFU/100mL	1600	25	No detected
Oil and Grease in mg/L	<5	<5	<5

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

Monitoring Parameter(s)	Monitoring Station WM2
	Monitoring Results				Action Level	Limit Level
	Dec 2022	Jan 2023	Feb 2023	Mar 2023	Action Level	Limit Level
pH	7.5	7.3	7.2	7.0	>7.6	>7.7
DO in mg/L	6.5	6.9	7.5	7.9	<5	<4
Turbidity in NTU	23.3	4.1	8.6	13.7	>108.3	>108.9
Electrical Conductivity in μS/cm	114	120	124	124	---	---
SS in mg/L	25.6	20.4	9.1	12.0	>94.5	>94.7
Alkalinity in mg/L	35	38	42	36	---
COD in mg/L	<5	6	7	<5
BOD₅in mg/L	<2	<2	<2	<2
TOC in mg/L	3	2	5	3
Ammonia-nitrogen in mg/L	0.18	0.16	0.29	0.33
TKN in mg/L	0.4	0.3	0.4	0.5
Nitrate in mg/L	0.10	0.10	0.01	0.05
Sulphate in mg/L	8	7	5	5
Sulphite in mg/L	<2	<2	<2	<2
Phosphorus as P in mg/L	<0.01	<0.01	<0.01	<0.01
Chloride in mg/L	6	7	6	6
Sodium in µg/L	6710	6400	5710	5810
Mg in µg/L	1140	1020	720	690
Ca in µg/L	12100	11200	7390	7020
K in µg/L	2310	1680	1130	1050
Fe in µg/L	6040	6040	10700	10600
Ni in µg/L	<1	<1	<1	<1
Zn in µg/L	21	31	34	20
Mn in µg/L	2150	2100	2910	3070
Cu in µg/L	2	2	1	1
Pb in µg/L	2	1	<1	<1
Cd in µg/L	<0.2	<0.2	<0.2	<0.2
Coliform Count in CFU/100mL	320	21	4200	14
Oil and Grease in mg/L	<5	<5	<5	<5

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
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
Electrical Conductivity in μS/cm	147	212	142	---	---
SS in mg/L	48.1	34.2	83.2	>94.5	>94.7
Alkalinity in mg/L	48	58	35	---
COD in mg/L	15	13	14
BOD₅in mg/L	2.0	3.0	<2
TOC in mg/L	2	5	2
Ammonia-nitrogen in mg/L	<0.01	0.39	0.14
TKN in mg/L	0.7	0.8	0.8
Nitrate in mg/L	0.14	0.03	0.32
Sulphate in mg/L	9	8	17
Sulphite in mg/L	<2	<2	<2
Phosphorus as P in mg/L	<0.01	<0.01	<0.01
Chloride in mg/L	7	15	11
Sodium in µg/L	7890	11800	6830
Mg in µg/L	1370	1420	1560
Ca in µg/L	15400	18600	18600
K in µg/L	3410	3900	3050
Fe in µg/L	9240	8990	3850
Ni in µg/L	2	1	12.0
Zn in µg/L	35	26	51
Mn in µg/L	2220	2370	509
Cu in µg/L	4	3	6
Pb in µg/L	4	3	11
Cd in µg/L	<0.2	<0.2	<0.2
Coliform Count in CFU/100mL	330	1500	4200
Oil and Grease in mg/L	<5	<5	<5

Monitoring Parameter(s)	Monitoring Station WM2
	Monitoring Results			Action Level	Limit Level
	Jul 2023	Aug 2023	Sep 2023	Action Level	Limit Level
pH	7.1	6.8	7.2	>7.6	>7.7
DO in mg/L	7.3	7.0	7.6	<5	<4
Turbidity in NTU	50.2	32.2	12	>108.3	>108.9
Electrical Conductivity in μS/cm	137	133	125	---	---
SS in mg/L	16.8	30.8	7.6	>94.5	>94.7
Alkalinity in mg/L	38	35	31	---
COD in mg/L	9	7	6
BOD₅in mg/L	<2	<2	<2
TOC in mg/L	2	<1	2
Ammonia-nitrogen in mg/L	0.07	0.08	0.13
TKN in mg/L	0.3	0.4	0.3
Nitrate in mg/L	0.26	0.24	0.24
Sulphate in mg/L	13	17	20
Sulphite in mg/L	<2	<2	<2
Phosphorus as P in mg/L	<0.01	<0.01	<0.01
Chloride in mg/L	7	6	4
Sodium in µg/L	6120	5840	4680
Mg in µg/L	1330	1480	1290
Ca in µg/L	15600	16100	<0.2
K in µg/L	2130	2140	1450
Fe in µg/L	2370	2710	670
Ni in µg/L	2.0	4	<1
Zn in µg/L	26	68	10
Mn in µg/L	757	1160	563
Cu in µg/L	2	2	<1
Pb in µg/L	3	4	1
Cd in µg/L	<0.2	<0.2	<0.2
Coliform Count in CFU/100mL	850	290	290
Oil and Grease in mg/L	<5	<5	<5

Monitoring Parameter(s)	Monitoring Station WM2
	Monitoring Results			Action Level	Limit Level
	Oct 2023	Nov 2023	Dec 2023	Action Level	Limit Level
pH	7.6	7.5	7.5	>7.6	>7.7
DO in mg/L	7.5	6.5	5.6	<5	<4
Turbidity in NTU	43.2	20.8	60.2	>108.3	>108.9
Electrical Conductivity in μS/cm	148	159	191	---	---
SS in mg/L	19.4	10.0	44.6	>94.5	>94.7
Alkalinity in mg/L	36	44	54	---
COD in mg/L	<5	<5	7
BOD₅in mg/L	<2	<2	<2
TOC in mg/L	2	2	2
Ammonia-nitrogen in mg/L	0.11	0.06	0.26
TKN in mg/L	0.2	0.1	0.5
Nitrate in mg/L	0.25	0.19	0.15
Sulphate in mg/L	18	24	22
Sulphite in mg/L	<2	<2	<2
Phosphorus as P in mg/L	<0.01	<0.01	<0.01
Chloride in mg/L	5	6	8
Sodium in µg/L	5190	6010	7770
Mg in µg/L	1320	1470	1970
Ca in µg/L	16500	19400	23800
K in µg/L	2470	2010	2480
Fe in µg/L	1780	1340	3080
Ni in µg/L	1.0	2	2
Zn in µg/L	13	20	26
Mn in µg/L	703	1350	2540
Cu in µg/L	1	1	3
Pb in µg/L	5	1	4
Cd in µg/L	<0.2	<0.2	<0.2
Coliform Count in CFU/100mL	1000	56	10
Oil and Grease in mg/L	<5	<5	<5

Table 5-6 Summary of Additional Impact Surface Water Monitoring Results on 28 September 2023

Monitoring Parameter(s)	Monitoring Station
	WM2			GR3 (EPD Monitoring Location)
	Monitoring Results	Action Level	Limit Level	Monitoring Results
pH	7.5	>7.6	>7.7	7.4
DO in mg/L	7.8	<5	<4	7.6
Turbidity in NTU	8.8	>108.3	>108.9	13.1
Electrical Conductivity in μS/cm	71	---	---	108
SS in mg/L	5.5	>94.5	>94.7	4.9
COD in mg/L	<5			6
BOD₅ in mg/L	<2			<2
Ammonia-nitrogen in mg/L	2			2
Chloride in mg/L	0.12			0.10
Iron in µg/L	910			670
Zinc in µg/L	13			20
Coliform Count in CFU/100mL	3400			380

5.2.3.2 The Summary of Impact Surface Water Quality Exceedance are shown in Table 5-7.

Table 5-7 Summary of Impact Surface Water Quality Exceedance during the reporting period

Surface Water Quality Monitoring Station		WM1		WM2
Level Exceedance Parameters		Action Level	Limit Level	Action Level	Limit Level
pH	Exceedance Date	-	-	-	-
pH	Exceedance Count	0	0	0	0
DO	Exceedance Date	4 Aug 23*	-	-	-
DO	Exceedance Count	1	0	0	0
Turbidity	Exceedance Date	-	-	-	21 Jun 23
Turbidity	Exceedance Count	0	0	0	1
SS	Exceedance Date	-	-	-	-
SS	Exceedance Count	0	0	0	0

Remarks: * equal to non-project related

5.2.3.3 No exceedance of Action and Limit Levels of surface water monitoring was recorded from December 2022 to March 2023

5.2.3.4 No exceedance of Action Levels of surface water monitoring was recorded from April to June 2023. 1 turbidity exceedance of Limit Levels of surface water quality at WM2 was recorded from April to June 2023. After the investigation, the exceedance may involve the construction runoff of the project. The rectification actions are conducted by the contractor in progress. The rectification works should be achieved minimization the potential risk of causing high concentration of construction runoff, enhancement of maintenance of Temporary Surface Water Drainage System (TSWDS), enhancement of the effectiveness and treatment capacity of the TSWDS & Enhancement of temporary landscape treatment as green cover and Minimization the potential risk of causing high concentration of construction runoff.

5.2.3.5 No exceedance of Action Levels of surface water monitoring was recorded in July 2023.

5.2.3.6 One DO exceedance of Action Level of surface water quality at WM1 was recorded in August 2023. The Notification of Environmental Quality Limits Exceedance is presented in Appendix G. In summary of the investigation, the DO exceedance in Action Level of Surface Water Quality at WM1 may involve the vary of temperature under the hot weather. Therefore, the exceedance is not related to project. No exceedance of Limit Level of surface water monitoring at WM1 was recorded in August 2023. No exceedance of Action Levels and Limit Level of surface water monitoring at WM2 were recorded in August 2023.

5.2.3.7 No exceedance of Action and Limit Levels of surface water monitoring was recorded from September to December 2023.

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 5-8 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
Dec 2022	Portion A +55 mpD Platform	Excavation Works
Jan to Feb 2023	Portion A +58 mpD,+55 mpD Platform
Mar to Jun 2023	Portion A +55 mpD to 70 mpD Platform
Jul to Dec 2023	Portion A +50 mpD to 70 mpD Platform

7.3 Monitoring Results

7.3.1 The LFG monitoring was conducted at designated location of Portion A (Conducted on working days) during the reporting period. 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 Platform	Dec 2022	0	0	0	20.4 (20.1 – 20.8)
Portion A +58 mpD,+55 mpD Platform	Jan 2023	0	0	0	20.3 (20.1 – 20.6)
Portion A +58 mpD,+55 mpD Platform	Feb 2023	0	0	0	20.4 (20.1 – 20.6)
Portion A +55 mpD to 70 mpD Platform	Mar 2023	0	0	0	20.4 (20.2 – 20.8)
	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)
Portion A +50 mpD to 70 mpD Platform	Jul 2023	0	0	0	20.1 (20.0 – 20.2)
	Aug 2023	0	0	0	20.2 (20.1– 20.4
	Sep 2023	0	0	0	20.2 (20.1 – 20.2)
	Oct 2023	0	0	0	20.2 (20.1 – 20.3)
	Nov 2023	0	0	0	20.1 (20.0 – 20.2)
	Dec 2023	0	0	0	20.1 (20.0 – 20.2)
Action Level		>10% LEL	---	>0.5%** CO₂	<19%
Limit Level		>20% LEL	---	>1.5% CO₂	<18%

* 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 The Summary of Landfill Gas Exceedance are shown in Table 7-3.

Table 7-3 Summary of Landfill Gas Exceedance during the reporting period

Landfill Gas Monitoring Station		Portion A +55 mpD Platform		Portion A +58 mpD,+55 mpD Platform		Portion A +55 mpD to 70 mpD Platform		Portion A +50 mpD to 70 mpD Platform
Level Exceedance Parameters		Action Level	Limit Level	Action Level	Limit Level	Action Level	Limit Level	Action Level	Limit Level
CH₄	Exceedance Date	-	-	-	-	-	-	-	-
CH₄	Exceedance Count	0	0	0	0	0	0	0	0
CO₂	Exceedance Date	-	-	-	-	-	-	-	-
CO₂	Exceedance Count	0	0	0	0	0	0	0	0
O₂	Exceedance Date	-	-	-	-	-	-	-	-
O₂	Exceedance Count	0	0	0	0	0	0	0	0

Remarks: * equal to non-project related

7.3.3 No exceedance of Action and 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.

7.3.4 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 7-4 shall be carried out.

Table 7-4 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 The post-transplantation monitoring was conducted based on the requirement of the approved Transplantation Proposal for Plant Species of Conservation Importance (Rev.1). The 1^st to 15^th Post-transplantation Monitoring and Audit Reports (24^th November 2022 to 13^th October 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. The post-transplantation monitoring had been completed in October 2023. No further post-transplantation monitoring will be conducted in accordance with the requirement of the approved Transplantation Proposal for Plant Species of Conservation Importance (Rev.1).

10.1.2 In the reporting period, the post-translocation monitoring for the Endemic Freshwater Crab Somanniathelphusa zanklon was conducted based on the requirement of the approved Revised Translocation Proposal for the Endemic Freshwater Crab Somanniathelphusa zanklon. The 1^st to 12^th Post-Translocation Monitoring Reports (November 2022 to July 2023) present the details of requirements, monitoring results and site inspection with photos. During the reporting period, no S. zanklon individual is identified. The post-translocation monitoring had been completed in July 2023. No further post-translocation monitoring will be conducted in accordance with the requirements of the Revised Translocation Proposal for the Endemic Freshwater Crab Somanniathelphusa zanklon.

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-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
	12^th	18 Jul 2023
	13^th	11 Aug 2023
	14^th	15 Sep 2023
	15^th	13 Oct 2023
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
	12^th (Jul 2023)	12 Jul 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 56 weekly environmental site inspections were conducted during the reporting period. 13 of them were the joint environmental site inspections with the representatives of ER, Contractor, IEC and 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	12 Dec 2022	Reminder: The vehicle exit road shall be kept clear of dusty materials.	The Contractor was reminded to schedule watering for the vehicle exist road.
	28 Dec 2022	Observation: The vehicle road is covered with dusty materials in Portion A.	The vehicle entrance shall be kept clear of dusty materials.
	28 Dec 2022	Observation: The work area is dry and fugitive dust is observed from loading and unloading activity in Portion D.	The Contractor has been recommended to schedule watering for work area and to spray with water during loading and unloading activities.
	3 Jan 2023	Observation: The work area was dry and fugitive dust was observed from loading and unloading activity in Portion A and Portion D.	The Contractor has been recommended to schedule watering for the work area.
	9 Jan 2023	Observation: The work area in SBA was observed dry and fugitive dust was observed.	The Contractor has been recommended to schedule watering for work area in SBA area.
	16 Jan 2023	Reminder: The vehicle entrance was not maintained properly in Portion A.	The Contractor has been reminded to repave the road section between the washing facilities and the exit point.
	16 Jan 2023	Reminder: Open stockpile was observed in Portion D.	The Contractor has been reminded to cover the open stockpile with impervious sheets.
	27 Jan 2023	Observation: Dusty stockpiles were observed in SBA.	The contractor was recommended that dusty stockpile shall be covered with impervious sheet to prevent dust dispersion.
	27 Jan 2023	Reminder: The exposed earth was dry and dusty in Portion D.	The Contractor has been reminded to cover the exposed earth with impervious sheets or other means to prevent dust dispersion.

Parameter	Date	Observation and Reminders	Follow-up Action Taken
Air Quality	1 Feb 2023	Observation: Vehicle washing was implemented in SBA.	The Contractor has been recommended to provide vehicle washing facility at the exit of SBA.
	1 Feb 2023	Reminder: The unpaved area in Portion D was dry and dusty. Dry and fugitive dust was observed in the work area in Portion A.	The Contractor has been reminded to increase the frequency of watering to the unpaved area in Portion D and work area in Portion A.
	1 Feb 2023	Reminder: The open stockpiles in SBA were not covered with impervious sheets.	The Contractor has been reminded to cover the stockpile with impervious sheets.
	6 Feb 2023	Observation: Fugitive dust was observed in Portion A and D.	The Contractor has been recommended to increase the frequently of watering unpaved area and work area or other dust suppression method in Portion A and D to minimize dust dispersion.
	13 Feb 2023	Reminder: The Contractor was reminded that the frequently of watering unpaved area and work area or other dust suppression method in Portion A is reminded should be increased.	The frequently of watering unpaved area and work area or other dust suppression method in Portion A was increased.
	20 Feb 2023	Observation: The fugitive dust was observed in Portion A.	The Contractor was recommended to increase the frequency of watering to the unpaved area and work area in Portion A.
	20 Feb 2023	Observation: The lack of NRMN Label was observed in the generator at SBA.	The Contractor was recommended to label the NRMN Label on the generator at SBA.
	27 Feb 2023	Observation: The site area in SBA was dry and fugitive dust was observed.	The Contractor has been recommended to schedule watering and to increase the frequency of watering if necessary in SBA.
	27 Feb 2023	Observation: Vehicle washing shall be implemented in SBA.	The Contractor has been recommended to implement vehicle washing at the exit of Portion.
	27 Feb 2023	Observation: More than 20 bags of cement were not covered entirely by impervious sheets in SBA.	The Contractor has been recommended to cover the cement bags entirely.
	27 Feb 2023	Reminder: The Contractor has been reminded to schedule watering for Portion D.	The Contractor has been reminded to schedule watering and to increase the frequency of watering if necessary in Portion D.

Parameter	Date	Observation and Reminders	Follow-up Action Taken
Air Quality	6 Mar 2023	Reminder: The Contractor was reminded to increase the frequency of watering at unpaved road and works area of SBA and Portion D.	The frequency of watering at unpaved road and works area of SBA and Portion D should be increased.
	13 Mar 2023	Observation: Fugitive dust was observed from the breaking and excavation works in Portion E3-1. 1.	The Contractor has been reminded to spray water on surface or the dusty material during breaking and excavation works.
	13 Mar 2023	Reminder: The Contractor was reminded to increase the frequency of watering at unpaved road and works area of Portion A.	The frequency of watering at unpaved road and works area of Portion A should be increased.
	20 Mar 2023	Observation: Stockpiles of dusty material are not covered with impervious sheets.	The Contractor has been reminded to fully cover the stockpiles of dusty material with impervious sheets.
	20 Mar 2023	Reminder: The Contractor was reminded to increase the frequency of watering in construction site to prevent dust dispersion.	Frequency of watering in the construction site should be increased to prevent dust dispersion.
	27 Mar 2023	Observation: Sand and silt were observed at the vehicle entrance in SBA.	The contractor has been recommended that the vehicle entrance shall be kept clear.
	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.

Parameter	Date	Observation and Reminders	Follow-up Action Taken
Air Quality	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.
	26 Jun 2023	Reminder: The unpaved assess road was dry.	The contractor was reminded to increase the frequency of watering at the Portion A.
	3 Jul 2023	Observation: Dusty stockpiles in Portion A shall be covered with impervious sheets when they are not in used.	The Contractor was reminded to cover the dusty stockpile with impervious sheets.
	31 Jul 2023	Observation: The slope surface at the Portion E4 shall be coved by impervious sheet.	The contractor was recommended that the exposed slope at the Portion E4 should be covered by impervious sheet. The exposed slope at the Portion E4 should be treated with shotcrete for long term.
	31 Jul 2023	Observation: The assess road at the Portion E4 was dry.	The contractor was advised that the assess road at the Portion E4 should be sprayed with water when the assess road is dry to minimize the dust suppression. The water sprinkler should be considered to establish at the assess road of the Portion E4.
	28 Aug 2023	Observation: The work area in Portion A was dry and dusty.	The contractor was advised to schedule watering in the work area and review the coverage of the water sprinkler.
	4 Sep 2023	Observation: Dust drift was found at the assess road of Portion A when vehicle moving.	The contractor was advised to increase the frequency of water spraying at the assess road of Portion A.

Parameter	Date	Observation and Reminders	Follow-up Action Taken
Air Quality	11 Sep 2023	Observation: The dusty stockpile in SBA should be covered with impervious sheet when the rainfall is forecast.	The Contractor was advised to cover the stockpiles with impervious sheet when they are idle.
	18 Sep 2023	Observation: The demolished tree, shrub or vegetation in Portion B2 should be covered with impervious sheets or placed within a shelter.	The Contractor was reminded to cover the demolished tree, shrub or vegetation with impervious sheets or placed within a shelter.
	18 Sep 2023	Observation: The dry PFA in Portion B2 should be covered entirely with impervious sheets.	The Contractor was reminded to cover dry PFA entirely with impervious sheets.
	18 Sep 2023	Observation: The metal plate at the vehicle entrance in Portion B2 should cover unpaved road surface in Portion B2.	Vehicle entrance should be paved with concrete, bituminous materials, hardcore or metal plates, and kept clear of dusty materials.
	18 Sep 2023	Observation: The main haul road in Portion E4 was dry ad dusty.	The Contractor was advised to schedule watering and recommended to install water sprinklers or mist spray in long term.
	25 Sep 2023	Observation: The main haul road and work site should be wetted regularly to minimize the dust dispersion.	The Contractor was reminded to switch on the water sprinklers along the haul road in SBA and to schedule watering for unpaved haul road and work area. The Contractor has been advised to increase the frequency of watering if necessary under the hot weather condition to minimize dust dispersion.
	16 Oct 2023	Reminder: The contractor was reminded to provide regular water spraying to the haul road to control the dust level.	The contractor was reminded to provide regular water spraying to the haul road to control the dust level.
	24 Oct 2023	Reminder: The contractor was reminded to increase the water spraying at the unpaved area and assess road.	The contractor was reminded to increase the water spraying at the unpaved area and assess road.
	6 Nov 2023	Observation: The outside surrounding of the scaffolding without dust screen, sheeting or netting was found at the Portion D.	The contractor was advised that the effective dust screens, sheeting or netting should be provided to enclose the scaffolding from the ground floor level of the building, or a canopy provided from the first-floor level up to the highest level of the scaffolding.

Parameter	Date	Observation and Reminders	Follow-up Action Taken
Air Quality	13 Nov 2023	Observation: The loaded dump truck without covering impervious sheet was found at the assess road between Portion A and E4.	The contractor was recommended to ensure all of loaded dump trucks should be covered by impervious sheeting.
	27 Nov 2023	Reminder: The contractor was reminded that water spraying shall be provided regularly for dust control.	The contractor was reminded that water spraying shall be provided regularly for dust control.
	4 Dec 2023	Observation: The dust dispersion was observed in the site.	The contractor was advised to regularly water the works area and provide enough sprayers to dampen the surface of construction materials and the site, especially during the work process, to minimize dust dispersion.
	11 Dec 2023	Observation: The accumulated uprooting of trees at portion E4 was observed.	The contractor was advised to regularly water the uprooted trees to prevent dust dispersion and arrange for regular disposal to avoid accumulation.
	18 Dec 2023	Observation: Stockpiling of dusty material without covered by impervious sheet at Portion D was observed.	The contractor was reminded that stockpiling of dusty material should be covered by impervious sheet at Portion D to prevent dust dispersion.
	18 Dec 2023	Reminder: The contractor was recommended that the exposed slope surface at SBA should be covered by an impervious sheet in the short term and should be shotcrete or other measurements for long-term surface protection.	The contractor was recommended that the exposed slope surface at SBA should be covered by an impervious sheet in the short term and should be shotcrete or other measurements for long-term surface protection.
	27 Dec 2023	Observation: Assess road was dry and fugitive dust was observed, especially at portion E4.	The contractor was recommended to arrange watering and provide enough sprayers to minimize dust dispersion at all assess road.
	27 Dec 2023	Observation: Exposed slope surface without covered by tarpaulin sheets at portion E4 was observed.	The contractor was advised that the exposed slope surface at portion E4 should be covered by tarpaulin sheets or other measurement like shotcrete or hydroseeding for long term slope surface protection.
	27 Dec 2023	Observation: Dusty materials without covered by impervious sheet at portion E4 was observed.	The contractor was reminded that the dusty materials should be covered with impervious sheet to prevent dust suppression.
Noise	No specific observation was identified in the reporting period.

Parameter	Date	Observation and Reminders	Follow-up Action Taken
Water Quality	5 Dec 2022	Reminder: 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 Dec 2022	Reminder: 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.
	19 Dec 2022	Observation: Sediments are accumulated in the channel at the vehicle wash bay.	The Contractor was recommended to remove the sediments at least on a weekly basis.
	3 Jan 2023	Observation: Rotten leaves and sediments were observed in the channel at Portion D.	The Contractor has been recommended to clean up the channel at Portion D.
	16 Jan 2023	Reminder: The vehicle entrance was not maintained properly in Portion A.	Earth bund shall be provided at the vehicle washing entrance to prevent leakage of the run-off.
	16 Jan 2023	Reminder: Sand and silt were accumulated in the channel of the vehicle washing.	The Contractor has been reminded to remove the sand and silt in the channel regularly.
	6 Feb 2023	Observation: Sand and silt shall be regularly removed from the sump pit in the vehicle washing bay in Portion A.	The Contractor has been recommended to remove sand and silt in the sump pit and the channel at the vehicle washing bay regularly.
	27 Feb 2023	Observation: Construction runoff in the lower area at Portion D shall be collected and divided to silt removal facilities.	The Contractor has been recommended to ensure construction runoff shall be divided into silt removal facilities.
	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.

Parameter	Date	Observation and Reminders	Follow-up Action Taken
Water Quality	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.
	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.

Parameter	Date	Observation and Reminders	Follow-up Action Taken
Water Quality	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.
	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.
	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.

Parameter	Date	Observation and Reminders	Follow-up Action Taken
Water Quality	3 Jul 2023	Observation: Muddy water was observed at the vehicular entrance in Portion A.	The Contractor was reminded to clear the muddy water and divert the muddy water to wastewater treatment facility.
	12 Jul 2023	Observation: The stagnant water, floating leaves, deposited silt and grit were found at the sedimentation basin near the wheel washing facilities at the Portion B1.	The contractor was recommended that the stagnant water should be collected to silt removal facilities for treatment before reusing for wheel washing. The floating leaves, deposited silt and grit should be removed regularly.
	12 Jul 2023	Observation: The exposed slope surfaces were not covered by tarpaulin sheets or treated with shotcrete at the Portion E3-1.	The contractor was recommended to implement the cover works of exposed slope surfaces by tarpaulin sheets or shotcrete at the Portion E3-1 to minimise the potential high concentration construction runoff to silt removal facilities.
	18 Jul 2023	Observation: The earth bund along the edge of the slope in Portion A was collapsed. The earth bund along the edge of the slope in Portion A should be reconstructed to prevent surface runoff flowing outside the site boundary.	The Contractor was reminded to review the height of the earth bund to ensure the surface runoff should not flow outside the site boundary.
	24 Jul 2023	Observation: Dusty materials was entering in the exist channel in Portion A.	Earth bund or sand barriers shall be provided along the existing channels in Portion A.
	24 Jul 2023	Observation: Earth bund shall be constructed at the edge of the slope to prevent surface runoff flowing outside the site in Portion A.	The contractor was recommended to construction earth bund along the edge of the slope in Portion A.
	24 Jul 2023	Observation: The accumulated silt and grit were found near the sandbags barriers of the Portion E3-1 silt removal facilities.	The contractor was advised that the silt and grit should be removed near the sandbags barriers of the Portion E3-1 silt removal facilities after heavy rain.
	24 Jul 2023	Reminder: The accumulated silt in sedimentation basin Portion E3 shall be removed regularly.	The Contractor was reminded to clear up the accumulated silt regularly to ensure the proper function of the sedimentation basin.
	24 Jul 2023

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 and Summaries of complaints
Appendix K	Graphical Presentation for comparison between monitoring results and EIA Predictions

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

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

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)

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 4-1 Noise Monitoring Locations

Table 4-2 Noise Monitoring Parameters, Frequency and Duration

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

Table 4-4 Summary of Impact Noise Exceedance during the reporting period

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

Table 5-6 Summary of Additional Impact Surface Water Monitoring Results on 28 September 2023

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

Month	Average Leq, 30min, dB(A) (Range)
	Noise Monitoring Station
	NM1a	NM2a
Dec 2022	51.1 (48.2 – 54.0)	48.1 (47.6 – 50.0)
Jan 2023	53.6 (51.1 – 56.1)	49.8 (48.9 – 51.2)
Feb 2023	52.8 (47.0 – 54.9)	50.2 (46.2 – 54.5)
Mar 2023	58.0 (53.1 – 62.3)	57.1 (42.3 – 62.1)
Apr 2023	56.8 (53.7 – 58.4)	60.1 (52.8 – 65.4)
May 2023	57.4 (47.6 – 61.0)	55.8 (48.4 – 58.0)
Jun 2023	58.6 (53.5 – 61.5)	53.9 (48.5 – 57.7)
Jul 2023	62.1 (61.0 – 63.7)	56.3 (54.2 – 58.2)
Aug 2023	52.5 (51.3 – 53.1)	51.1 (47.3 – 54.5)
Sep 2023	58.3 (56.6 – 59.3)	53.6 (49.8 – 54.7)
Oct 2023	63.1 (59.6 – 64.8)	55.2 (53.8 – 56.3)
Nov 2023	60.0 (52.2 – 63.3)	49.1 (47.7 – 49.8)
Dec 2023	61.9 (57.7 – 64.1)	53.5 (49.6 – 54.9)
Action Level	When one documented complaint is received
Limit Level	>75dB(A)

Noise Monitoring Station		NM1(a)		NM2(a)
Level Exceedance Parameters		Action Level	Limit Level	Action Level	Limit Level
LA_eq(30mins)	Exceedance Date	-	-	-	-
LA_eq(30mins)	Exceedance Count	0	0	0	0