Contents

Executive Summary

1 Introduction

1.1 Background

1.2 Project Description                                                            

1.3 Scope of the EM&A Report

1.4 Project Organisation

1.5 Summary of Construction Works

1.6 Summary of EM&A Programme Requirements

1.7 Status of Statutory Environmental Compliance with the Environmental Permit

1.8 Status of Other Statutory Environmental Requirements

2 EM&A Results

2.1 Air Quality Monitoring

2.2 Noise Monitoring

2.3 Surface Water Quality Monitoring

2.4 Landscape and Visual Monitoring

2.5 EM&A Site Inspection

2.6 Waste Management Status

2.7 Implementation Status of Environmental Mitigation Measures

2.8 Summary of Exceedances of the Environmental Quality Performance Limit

2.9 Summary of Complaints, Notification of Summons and Successful Prosecutions

3 Conclusion and Recommendation

Annexes

Annex A       Work Programme

Annex B       Environmental Mitigation Implementation Schedule

Annex C       Monitoring Schedule for This Reporting Period

Annex D     Air Quality
Annex D1  24-hour TSP Monitoring Results
Annex D2  Event and Action Plan for Dust Monitoring
Annex D3  Meteorological Data

Annex E     Noise
Annex E1 Noise Monitoring Results
Annex E2  Event and Action Plan for Noise Monitoring

Annex F      Surface Water Quality
Annex F1  Surface Water Quality Monitoring Results
Annex F2  Event and Action Plan for Surface Water Quality Monitoring
Annex F3  Investigation Reports of Environmental Quality Limit Exceedance

Annex G       Cumulative Statistics on Exceedances, Environmental Complaints, Notification of Summons and Status of Prosecutions

Executive Summary

The SENT Landfill Extension (SENTX) forms an integral part in the Strategic Plan in maintaining the continuity of landfill capacity in the Hong Kong for the cost-effective and environmentally satisfactory disposal of waste.  ERM-Hong Kong, Limited (ERM) is commissioned to undertake the role of Environmental Team (ET) for the construction, operation/restoration and aftercare of SENTX Project (“the Project”) in accordance with the requirements specified in the Environmental Permit (EP), updated Environmental Monitoring and Audit (EM&A) Manual, the approved Environmental Impact Assessment (EIA) Report of the Project taking account of the latest design and other relevant statutory requirements.  The construction (not including works related to site clearance and preparation) of the Project commenced on 2 January 2019.

This Quarterly EM&A report presents the EM&A works carried out during the period from 1 January to 31 March 2020 for the Project in accordance with the updated EM&A Manual. 

Exceedance of Action and Limit Levels for Air Quality

No exceedance of Action and Limit Levels for construction air quality monitoring was recorded in the reporting period.

Exceedance of Action and Limit Levels for Noise

No exceedance of Action and Limit Levels for construction noise monitoring was recorded in the reporting period. 

Exceedance of Action and Limit Levels for Surface Water Quality

One exceedance of the Limit Level for Suspended Solids (SS) was recorded for surface water quality impact monitoring in the reporting period.  The exceedance was considered non Project-related upon further investigation.

Environmental Complaints, Summons and Prosecutions

There were no complaints, notification of summons or prosecution recorded in the reporting period.

Reporting Change

There was no reporting change in the reporting period.

1 Introduction

1.1 Background

The SENT Landfill Extension (SENTX) forms an integral part in the Strategic Plan in maintaining the continuity of landfill capacity in the Hong Kong for the cost-effective and environmentally satisfactory disposal of waste.  The Environmental Impact Assessment (EIA) Report and the associated Environmental Monitoring and Audit (EM&A) Manual for the construction, operation, restoration and aftercare of the SENTX (hereafter referred to as “the Project”) have been approved under the Environmental Impact Assessment Ordinance (EIAO) in May 2008 (Register No.: AEIAR-117/2008) (hereafter referred to as the approved EIA Report) and an Environmental Permit (EP-308/2008) (EP) was granted by the Director of Environmental Protection (DEP) on 5 August 2008. 

Since then, applications for Variation of an Environmental Permit (No. VEP-531/2017) were submitted to EPD and the Variation of Environmental Permits (EP-308/2008/A and EP-308/2008/B) were granted on 6 January 2012 and 20 January 2017, respectively, as the Hong Kong SAR Government has decided to reduce the scale of the design scheme of SENTX assessed in the approved EIA Report and SENTX will only receive construction waste.  In May 2018, a Further Environmental Permit (FEP) (FEP-01/308/2008/B) was granted to the SENTX’s contractor, Green Valley Landfill, Limited (GVL).

ERM-Hong Kong, Limited (ERM) and Meinhardt Infrastructure and Environment Limited (Meinhardt) are commissioned to undertake the roles of Environmental Team (ET) and the Independent Environmental Checker (IEC), respectively, to undertake the EM&A activities for the Project in accordance with the requirements specified in the EP, updated EM&A Manual ([1]), approved EIA Report ([2]) taking account of the latest design and other relevant statutory requirements.

1.2 Project Description

The SENTX is a piggyback landfill, occupying the southern part of the existing SENT Landfill (including its infrastructure area) and 13 ha of Tseung Kwan O (TKO) Area 137.  A layout plan of the SENTX is shown in Figure 1.1.  Under the latest design, the SENTX has a net void capacity of about 6.5 Mm³ and provides an additional lifespan of about 6 years, commencing operation upon exhaustion of the SENT Landfill.  The SENTX will receive construction waste only.

The key implementation milestones of the Project are indicatively summarised in Table 1.1.  The construction works of the Project commenced on 2 January 2019.

Table 1.1        Estimated Key Dates of Implementation Programme

Key Stage of the Project	Indicative Date
Start construction	2 January 2019
Commissioning of new infrastructure facilities	2020
Demolition of existing infrastructure facilities	2021
Start waste intake at SENTX	2021 or upon exhaustion of SENT Landfill
Estimated exhaustion date of SENTX	2027
End of aftercare for SENTX	2057

The major construction works of the SENTX includes:

· Site formation at the TKO Area 137 and the existing infrastructure area at SENT Landfill;

· Construction of surface and groundwater drainage systems;

· Construction of the leachate containment and collection systems;

· Construction of new leachate and landfill gas treatment facilities, site offices, maintenance yards at the new infrastructure area;

· Construction of new pipelines to transfer the leachate and landfill gas collected from the existing SENT Landfill to the treatment facilities at the new infrastructure area;

· Construction of the site access and new waste reception facilities; and

· Demolition of the facilities at the existing SENT Landfill infrastructure area.

1.3 Scope of the EM&A Report

This is the Quarterly EM&A Report for the Project which summarises the key findings of the EM&A programme during the reporting period from 1 January to 31 March 2020 for the construction works.

1.4 Project Organisation

The organisation structure of the Project is presented in Figure 1.2. 

Figure 1.2       Organisation Chart

Contact details of the key personnel are summarized in Table 1.2 below.

Table 1.2        Contact Information of Key Personnel

Party	Position	Name	Telephone
Contractor (Green Valley Landfill Limited)	Project Manager	Gary Barnicott	2706 8827
	Complaint Hotline
Environmental Team (ET) (ERM-Hong Kong, Limited)	ET Leader	Frank Wan	2271 3152
Independent Environmental Checker (IEC) (Meinhardt Infrastructure and Environment Limited)	IEC	W.K. Chiu	2859 1881

1.5 Summary of Construction Works

The programme of the construction is shown in Annex A.  As informed by the Contractor, the major works carried out in this reporting period include:

January 2020

· Building services works for control building of Landfill Gas Plant;

· Paving works at Landfill Gas Plant area;

· Flares and cooling towers installation of Landfill Gas Plant;

· Excavating, removing and replacing unsuitable fill materials;

· Construction of last bay of outlet box culvert;

· Rebar fixing, formwork and concreting to the superstructure of laboratory building;

· Installation of ammonia stripping plant, equalization tank, sequencing batch reactor tank and treated effluent tank at Leachate Treatment Plant (LTP) area;

· Construction of perimeter bund for Cell 2X;

· Maintenance and improvement of the temporary surface water drainage;

· Shotcreting and mass concrete for Buttress Wall;

· Installing groundwater pipe works from South to North at eastern side from Cell 3X to 4X;

· Liner installation at Cell 1X and 2X;

· Pipe rack installation;

· Construction of plinths of maintenance building;

· Construction of footing of fire service tank room and water tank room;

· Construction of perimeter bund channel; and

· Construction of pits and ducting for underground utilities.

February 2020

· Building services works for control building of Landfill Gas Plant;

· Paving works at Landfill Gas Plant area;

· Flares and cooling towers installation of Landfill Gas Plant;

· Excavating, removing and replacing unsuitable fill materials;

· Construction of drop inlet shaft, MHX1 manhole and inlet and outlet box culverts;

· Civil provisional works of LTP and superstructure of Bioplant building;

· Building services works for infrastructure buildings (EPD building, GVL building and laboratory building;

· Installation of ammonia stripping plant, equalization tank, sequencing batch reactor tank, treated effluent tank and Glass Reinforced Plastic (GRP) tanks at LTP area;

· Construction of perimeter bund for Cell 2X;

· Maintenance and improvement of the temporary surface water drainage;

· Shotcreting and mass concrete for Buttress Wall;

· Installing groundwater pipe works from South to North at Eastern side from Cell 3X to 4X;

· Liner installation at Cell 1X and 2X;

· Pipe rack installation;

· Installation of monitoring wells;

· Construction of footing of maintenance building;

· Construction of footing of fire service tank room and water tank room;

· Construction of perimeter bund channel; and

· Construction of pits and ducting for underground utilities.

March 2020

· Building services works and fitting-out works for Landfill Gas Plant area;

· Building services works and fitting-out works for infrastructure buildings (EPD building, GVL building and laboratory building);

· Installation of accessories such as staircases, pipes and walkways for equalization tanks, sequencing batch reactor tanks, treated effluent tank, GRP tanks and other tanks at LTP area;

· Placing leachate stone at Cell 2X;

· Maintenance and improvement of the temporary surface water drainage;

· Shotcreting and mass concrete for Buttress Wall;

· Finishing works for Western perimeter bund;

· Construction of perimeter bund channel;

· Installation of monitoring well LFG23;

· Construction of superstructure of fire service tank room and water service room; and

· Construction of pits and ducting for underground utilities.

The implementation schedule of the mitigation measures recommended in the Updated EM&A Manual is presented in Annex B.

1.6 Summary of EM&A Programme Requirements

The status for all environmental aspects are presented in Table 1.3.  The EM&A requirements remained unchanged during the reporting period.

Table 1.3        Summary of Status for the Environmental Aspects under the Updated EM&A Manual

Parameters	Status
Air Quality
Baseline Monitoring	The results of baseline air quality monitoring were reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.3
Impact Monitoring	On-going
Noise
Baseline Monitoring	The results of baseline noise monitoring were reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.3
Impact Monitoring	On-going
Surface Water Quality
Baseline Monitoring	The results of baseline surface water quality monitoring were reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.3
Impact Monitoring	On-going
Waste Management
Waste Monitoring	On-going
Landscape and Visual
Baseline Monitoring	The results of baseline landscape and visual monitoring were reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.3
Construction Phase Audit	On-going
Site Environmental Audit
Regular Site Inspection	On-going
Complaint Hotline and Email Channel	On-going
Environmental Log Book	On-going
Groundwater Quality
Pre-operation Baseline Monitoring	Commenced on 24 March 2020
Landfill Gas
Pre-operation Baseline Monitoring	Commenced on 24 March 2020

Taking into account the construction works, impact monitoring of air quality, noise, surface water quality and waste management were carried out in the reporting period.  The impact monitoring schedule of air quality, noise and surface water quality monitoring are provided in Annex C.  Groundwater and landfill gas pre-operation baseline monitoring were commenced on 24 March 2020.

The EM&A programme also involved environmental site inspections and related auditing conducted by the ET for checking the implementation of the required environmental mitigation measures recommended in the approved EIA Report and relevant EP submissions.  To promote the environmental awareness and enhance the environmental performance of the contractors, environmental trainings and regular environmental management meetings were conducted during the reporting period, which are summarised as below:

Ÿ Three environmental management meetings were held with the Contractor, ER, ET, IEC and EPD on 8 January, 27 February and 19 March 2020; and

Ÿ Environmental toolbox trainings on the following topics were provided by the Contractor to the workers:

Ÿ An Introduction to the Air Pollution Control (Smoke) Regulations on 6 January 2020;

Ÿ Clean Recycling on 17 January 2020;

Ÿ Quality Powered Mechanical Equipment on 11 February 2020;

Ÿ Green Procurement on 24 February 2020;

Ÿ Mosquito Control on 8 March 2020; and

Ÿ Illegal Dumping on 25 March 2020.

1.7 Status of Statutory Environmental Compliance with the Environmental Permit

The status of statutory environmental compliance with the EP conditions under the EIAO, submission status under the EP and implementation status of the recommended mitigation measures are presented in Table 1.4.  

Table 1.4        Status of Submissions required under the EP and Implementation Status of the recommended Mitigation Measures

EP Condition	Submission / Implementation Status	Status
2.3	Management Organisation of Main Construction Companies	Submitted and accepted by EPD.
2.4	Setting up of Community Liaison Group	Community Liaison Group was set up.
2.5	Submission of Detailed Landfill Gas Hazard Assessment Report	Submitted, and accepted by EPD on 10 January 2019.
2.6	Submission of Restoration and Ecological Enhancement Plan	Submitted to EPD on 28 June 2019.
2.7	Setting up of Trial Nursery	Trial Nursery works was commenced on 28 August 2019.
2.8	Advance Screen Planting	Advance Screen Planting works were completed on 28 June 2019.
2.9	Provision of Multi-layer Composite Liner System	Under implementation.

1.8 Status of Other Statutory Environmental Requirements

The environmental licenses and permits (including EP, Water Pollution Control Ordinance (WPCO) discharge license, registration as a chemical waste producer, and construction noise permit) that are valid in the reporting period are presented in Table 1.5.  No non-compliance with environmental statutory requirements was identified.  

Table 1.5        Status of Statutory Environmental Requirements

Description	Ref No.	Status
Environmental Permit	EP-308/2008	Granted on 5 August 2008
Variation of Environmental Permit	EP-308/2008/A	Granted on 6 January 2012
	EP-308/2008/B	Granted on 20 January 2017
Further Environmental Permit	FEP-01/308/2008/B	Granted on 16 May 2018
Water Discharge License under WPCO (Permit Holder: Chun Wo)	Licence No.: WT00033525-2019	Validity from 27 March 2019 to 31 March 2024
Billing Account for Disposal of Construction Waste	Chit Account Number: 5001692	Approved on 28 December 2005
Registration as a Chemical Waste Producer (Permit Holder: Chun Wo)	5213-839-C3507-10	Issued on 23 August 2018
Registration as a Chemical Waste Producer (Permit Holder: REC)	5518-839-R2289-06	Issued on 24 October 2019
Construction Noise Permit (Permit Holder: GVL)	GW-RE0075-20	Validity from 12 February 2020 to 11 August 2020
Construction Noise Permit (Permit Holder: Chun Wo)	GW-RE1001-19	Validity from 16 December 2019 to 10 June 2020
Construction Noise Permit (Permit Holder: REC)	GW-RE0029-20	Validity from 20 January 2020 to 31 May 2020

2 EM&A Results

The EM&A programme for the Project required environmental monitoring for air quality, noise and surface water quality as well as environmental site inspections for air quality, noise, surface water quality, waste management, and landscape and visual impacts.  The EM&A requirements and related findings for each component are summarised in the following sections.

2.1 Air Quality Monitoring

2.1.1 Monitoring Requirements and Equipment

According to the updated EM&A Manual of the Project, impact air quality monitoring (dust, in term of Total Suspended Particulates (TSP)) was carried out at the two designated monitoring locations (i.e. DM1 and DM2) at a 6-day interval.  It is proposed and agreed by IEC and EPD that the two existing TSP monitoring stations (i.e. TKO-A1 and TKO-A2a) currently operating by the Civil Engineering and Development Department (CEDD) can be used to monitor the 24-hour TSP impact associated with the SENTX construction.  The dust monitoring results were obtained from CEDD on regular basis.

The Action and Limit Levels of the air quality monitoring is provided in Table 2.1 below.

Table 2.1        Action and Limit Levels for 24-hour TSP

Monitoring Station	Action Level	Limit Level
DM-1 – Site Egress of TKO Area 137 Fill Bank	204 µg m-³	260 µg m-³
DM-2A –Combined Reception and Exit Office (CREO) of TKO Area 137 Fill Bank	193 µg m-³	260 µg m-³

High volume air samplers (HVSs) in compliance with the specifications listed under Section 3.2.2 of the updated EM&A Manual were used to measure 24-hour TSP levels at the CEDD dust monitoring stations.  The HVSs were calibrated upon installation and thereafter at bi-monthly intervals to check the validity and accuracy of the results.

The equipment used in the impact air quality monitoring programme and monitoring locations are summarised in Table 2.2 and illustrated in Figure 2.1 respectively.

Table 2.2        Dust Monitoring Details

Monitoring Station	Location	Parameter	Frequency and Duration	Monitoring Dates	Equipment
DM1	Site Egress of TKO Area 137 Fill Bank	24-hour TSP	Once every 6 days during the construction phase of the Project	5, 11, 17, 23, 29 January 2020 4, 10, 16, 22, 28 February 2020 5, 11, 17, 23, 29 March 2020	HVS Greasby 105 (S/N: 9795 (ET/EA/003/18))
DM2	Combined Reception and Exit Office (CREO) of TKO Area 137 Fill Bank				HVS Andersen G1051 (S/N: 1176 (ET/EA/003/05))

2.1.2 Monitoring Schedule for the Reporting Period

The schedule for air quality monitoring during the reporting period is provided in Annex C.

2.1.3 Results and Observations

The 24-hour TSP monitoring results are summarised in Table 2.3.  The detailed monitoring results and the graphical presentation of the 24-hour TSP monitoring results at each monitoring location are provided in Annex D1.

Table 2.3 Summary of 24-hour TSP Monitoring Results in the Reporting Period

Month	Monitoring Station	24-hr TSP Concentration (µg m^-3)		Action Level  (µg/m^3)	Limit Level  (µg/m^3)
		Average	Range
January 2020	DM-1	110	95 - 124	204	260
	DM-2	96	82 – 108	193	260
February 2020	DM-1	103	93 - 117	204	260
	DM-2	90	83 – 104	193	260
March 2020	DM-1	102	91 - 113	204	260
	DM-2	90	85– 94	193	260

The major dust sources in the reporting period included fugitive dust emission from exposed area in SENTX, as well as nearby operations of the existing SENT landfill and the TKO Area 137 Fill Bank.

All the 24-hour TSP results measured at the two monitoring stations were below the Action and Limit Levels in the reporting period.  No additional measure is thus required in accordance with the Event and Action Plan presented in Annex D2.

2.1.4 Meteorological Data

Meteorological data obtained from the on-site meteorological monitoring station at the existing SENT landfill (see Figure 2.1) were used for the dust monitoring and are shown in Annex D3.  The meteorological station will be moved to a new location at SENTX infrastructure area as per the updated EM&A Manual after the construction of the new infrastructure area is completed.  For the purpose of this EM&A programme, it is considered that meteorological data obtained at the existing SENT landfill meteorological monitoring station are representative of the Project area and could be used for the interpretation of the construction phase dust monitoring results.

2.2 Noise Monitoring

2.2.1 Monitoring Requirements and Equipment

According to the updated EM&A Manual of the Project, impact noise monitoring was conducted weekly at the monitoring location (i.e. NM1) to obtain one set of 30 minutes measurement between 07:00 and 19:00 hours on normal weekdays. 

The Action and Limit Levels for construction noise of the Project are provided in Table 2.4 below. 

Table 2.4 Action and Limit Levels for Construction Noise

Time Period	Action Level ^(a)	Limit Level ^(b)
07:00 – 19:00 hrs on normal weekdays	When one documented complaint is received from any one of the noise sensitive receivers (NSRs) or 75 dB(A) recorded at the monitoring station	75 dB(A) at NSRs
Notes: (a) 75dB(A) along and at about 100m from the SENTX site boundary was set as the Action Level. (b) Limits specified in the GW-TM and IND-TM for construction and operational noise, respectively.

Noise monitoring was performed by ALS Technichem (HK) Pty Ltd (HOKLAS Registration No. 066) using a sound level meter placed at the designated monitoring station NM1 (see Figure 2.1) in accordance with the requirements stipulated in the updated EM&A Manual.  Acoustic calibrator was deployed to check the sound level meter at a known sound pressure level.  Details of the deployed equipment are provided in Table 2.5.

Table 2.5 Noise Monitoring Details

Monitoring Station ^(1)	Location	Parameter	Frequency and Duration	Monitoring Dates	Equipment
NM1	SENTX Site Boundary (North)	Leq (30 min) measurement between 07:00 and 19:00 hours on normal weekdays (Monday to Saturday)	Once per week for 30 mins during the construction period of the Project	3, 9, 16, 23, 30 January 2020 6, 12, 20, 27 February 2020 5, 12, 18, 26 March 2020	Sound Level Meter: B&K 2238 (S/N: 2285762) Acoustic Calibrator: Rion NC-74 (S/N: 34657231)

2.2.2 Monitoring Schedule for the Reporting Period

The schedule for noise monitoring during the reporting period is provided in Annex C.

2.2.3 Results and Observations

A total of 13 impact noise monitoring events were scheduled during the reporting period.  However, monitoring was not conducted on 18 March 2020 due to adverse weather condition.  The noise monitoring results are summarised in Table 2.6 and graphically presented in Annex E1.

Table 2.6        Summary of Construction Noise Monitoring Results in the Reporting Period

Month	Monitoring Station	Measured Noise Level Leq (30 min), dB(A)
		Average	Range	Action and Limit Level
January 2020	NM1	50.5	47.8 – 53.0	75
February 2020	NM1	52.7	51.9 – 53.8	75
March 2020	NM1	52.5	50.5 – 54.9	75

Major noise sources identified during the noise monitoring included noise from operations of the existing SENT landfill and the TKO Area 137 Fill Bank, aircrafts and insects.

No exceedance of the Action and Limit Levels for construction noise monitoring was recorded in the reporting period.  No further mitigation measure was required in accordance with the Event and Action Plan presented in Annex E2.

2.3 Surface Water Quality Monitoring

2.3.1 Monitoring Requirements and Equipment

According to the updated EM&A Manual of the Project, impact surface water quality monitoring were carried out at the three designated surface water discharge points (i.e. DP3, DP4 and DP6) weekly to ensure that the SENTX will not cause adverse water quality impact.  Temporary relocation of surface water discharge point DP4 to DP4 (Future, temporary) as an interim arrangement due to site constraints and construction sequence was approved by EPD on 14 May 2019.  Impact surface water quality monitoring was carried out at DP4 (Future, temporary) (i.e. DP4T) from the monitoring event on 16 May 2019. In addition, suspension of impact surface water quality monitoring at DP3 was approved under the Baseline Monitoring Report by EPD on 24 July 2019 until the actual commencement of construction works affecting DP3 in 2021.

Dissolved Oxygen (DO) and pH value were measured in situ whereas the level of suspended solids (SS) were determined by ALS Technichem (HK) Pty Ltd (HOKLAS Registration No. 066).

The Action and Limit Levels of the surface water quality impact monitoring are provided in Table 2.7.

Table 2.7 Action and Limit Levels for Surface Water Quality

Parameters	Action Level	Limit Level
	DP4 & DP6
DO	< 5.80 mg/L	< 5.42 mg/L
SS	> 11.7 mg/L	> 12.7 mg/L
pH	> 8.39	> 8.40

The locations of the monitoring stations for the Project are shown in Figure 2.1.  All in situ monitoring instruments were checked, calibrated and certified by a laboratory accredited under HOKLAS or other international accreditation scheme before use, and subsequently re-calibrated at 3 monthly intervals throughout all stages of the surface water quality monitoring programme.  Calibration for a DO meter was carried out before measurement according to the instruction manual of the equipment model.  Details of the equipment used in the impact surface water quality monitoring works are provided in Table 2.8.

Table 2.8 Impact Surface Water Quality Monitoring Details

Monitoring Station	Location	Frequency	Monitoring Dates	Parameter	Equipment
DP4 (Future, temporary)	Surface water discharge point DP4	Weekly	3, 9, 16, 23, 30 January 2020 6, 12, 20, 27 February 2020 5, 12, 18, 26 March 2020	•pH •DO •SS	YSI Professional Plus (S/N: 10G101946) YSI Professional DSS (S/N: 17B102764)
DP6	Surface water discharge point DP6
Notes: (a) DP4 was temporary relocated to DP4 (Future, temporary) (i.e. DP4T) as an interim discharge point from the monitoring event on 16 May 2019. (b) Impact surface water quality monitoring at DP3 was suspended from the monitoring event on 25 July 2019 until the actual commencement of construction works affecting DP3 in 2021.

2.3.2 Monitoring Schedule for the Reporting Period

The schedule for surface water quality monitoring during the reporting period is provided in Annex C.

2.3.3 Results and Observations

A total of 13 monitoring events for impact surface water quality monitoring were scheduled at all designated monitoring stations during the reporting period.  However, sampling could not be carried out on 20 February 2020 at DP6 and in January and March 2020, on 6, 12 and 27 February 2020 at all monitoring locations due to insufficient flow.  Impact water quality monitoring results and graphical presentations are provided in Annex F1.

Action and Limit Level exceedance was recorded for surface water quality impact monitoring in the reporting period and actions in accordance with the Event and Action Plan presented in Annex F2 were undertaken.  Investigation on the Action and Limit Levels exceedance was conducted and summarised in Table 2.9 below.  Investigation report of the exceedance is presented in Annex F3.

Table 2.9 Details of Exceedances Recorded for Surface Water Quality Monitoring

Date	Monitoring Location	Parameter	Type of Exceedance	Remarks
20 February 2020	DP4 (Future, temporary)	SS	Limit Level	Non Project-related

Based on the investigation conducted for the monitoring event with potential Action and Limit Levels exceedance with the Contractor, and the IEC, the SS exceedance at DP4 (Future, temporary) on 20 February 2020 was considered non Project-related upon further investigation. 

The Contractor was reminded to implement all relevant mitigation measures for the construction works and maintain good site practice.  The ET will keep track on the monitoring data and ensure Contractor’s compliance of the environmental requirements.

2.4 Landscape and Visual Monitoring

2.4.1 Monitoring Requirements

According to the updated EM&A Manual of the Project, the monthly landscape and visual audit was conducted on 31 January, 26 February and 25 March 2020 to monitor the implementation of the landscape and visual mitigation measures during construction phase.

All relevant environmental mitigation measures listed in the approved EIA Report and the updated EM&A Manual and their implementation status are summarised in Annex B.

2.4.2 Results and Observations

The Contractor has implemented environmental mitigation measures as stated in the approved EIA Report and the EM&A Manual.

Regarding the landscape and visual audit, the Contractor was reminded to maintain the advance screen planting works as soon as possible to ensure effective screening of views of project works from the High Junk Peak Trail.  The Contractor has considered the mitigation measures during the design phase, including the preparation of the Construction Drawings and Detailed Landscape Design Drawings.

2.5 EM&A Site Inspection

Site inspections were carried out on a weekly basis with the Contractor, IEC and ER to monitor the implementation of proper environmental pollution control and mitigation measures for air quality, noise, surface water quality and waste management under the Project.  In the reporting period, 12 site inspections were carried out on 8, 16, 22 and 30 January, 6, 12, 20 and 27 February, 5, 12, 19 and 26 March 2020.

Key observations during the site inspections are summarized in Table 2.10.

Table 2.10     Key Observations Identified during the Site Inspections in this Reporting Period

Inspection Date	Environmental Observations and Recommendations
8 January 2020	· The Contractor shall cover the stockpile of dusty materials and conduct shotcrete mixing works in an area sheltered on the top and three sides near buttress wall to minimize dust impacts. · The Contractor shall store the construction waste properly in refuse skips and dispose of the waste regularly near buttress wall and future LFG plant. · The Contractor shall clear the general refuse disposed near buttress wall, future bioplant and at the temporary drain at Southern site boundary and dispose of the waste accumulated regularly to reduce odour and pest issues.
16 January 2020	· The Contractor shall conduct activities related to dusty materials i.e. shotcrete mixing works in an area sheltered on the top and three sides near buttress wall to minimize dust impacts. · The Contractor shall maintain the haul road near buttress wall to minimize SS runoff to DP3 channel. · The Contractor shall provide drip tray for chemicals stored at future bioplant. · The Contractor shall avoid accumulation of stagnant water near LTP and spray larvicides for pest control. · The Contractor shall segregate and store construction waste and general refuse in different skips and dispose of the waste accumulated near wheel washing facilities, future EPD building and future bioplant regularly.
22 January 2020	· The Contractor shall display NRMM label on the new sheet piling back hoe near Cell 1X and replace the faded NRMM label on the excavator near future maintenance building. · The Contractor shall remove the stagnant water accumulated in the drip tray near future GVL building to ensure effective containment of leakage. · The Contractor shall avoid accumulation of stagnant water near future GVL building and spray larvicides for pest control. · The Contractor shall segregate general refuse from construction waste near future maintenance building and bioplant and store the general refuse in enclosed bins near the site entrance to reduce odour and pest issues.
30 January 2020	· The Contractor shall clear the general refuse accumulated in the temporary drain near site entrance and near future bioplant. · The Contractor shall avoid accumulation of stagnant water near future GVL building and bioplant to minimise pest issues. · The Contractor shall remove the spray paint at DP6 and dispose of the waste as chemical waste.
6 February 2020	· The Contractor shall remove the deposited silt and grit at DP4T channel (near buttress wall) regularly to ensure it is functioning properly at all times. · The Contractor shall arrange collection of chemical waste stored in the chemical waste cabinet near site entrance and dispose of the chemical waste accumulated on site regularly. · The Contractor shall clear the general refuse accumulated at DP6 channel.
12 February 2020	· The Contractor shall provide drip trays for chemicals placed near sediment trap and future GVL building. · The Contractor shall remove the stagnant water accumulated in the drip trays near sediment trap and future bioplant and treat the clean-up materials as chemical waste. · The Contractor shall store the general refuse near site entrance and buttress wall in refuse skips properly and dispose of the waste accumulated regularly.
20 February 2020	· The Contractor shall clear the chemical spillage near sediment trap and handle the clean-up materials as chemical waste. · The Contractor shall maintain the drip tray near sediment trap and remove the stagnant water accumulated in the drip trays near sediment trap and future GVL building. · The Contractor shall avoid accumulation of stagnant water in the drain around future LTP to minimise pest issues. · The Contractor shall store the construction waste near future laboratory building and bioplant properly in refuse skips and dispose of the waste regularly. · The Contractor shall segregate and dispose of the general refuse accumulated near future bioplant and remove the stagnant water accumulated in the refuse skips.
27 February 2020	· The Contractor shall enhance watering to the site, especially to the perimeter bund and haul road to minimise dust impacts. · The Contractor shall replace the faded NRMM labels on the generator near site entrance and on the excavator near DP4T and ensure all labels displayed on site are clearly visible. · The Contractor shall avoid accumulation of stagnant water near site entrance, channel X10a, sump house and DP4T channel near buttress wall to minimise pest issues. · The Contractor shall store the general refuse separately from construction waste in the refuse skip near wheel washing facilities. · The Contractor shall remove the general refuse near Western site boundary and dispose of the waste regularly.
5 March 2020	· The Contractor shall conduct activities related to dusty materials i.e. shotcrete mixing near DP4T channel in an area sheltered on the top and three sides to minimise dust impact. · The Contractor shall display NRMM label on the bulldozer near sediment trap. · The Contractor shall provide drip trays for chemicals stored near buttress wall, DP4T channel and future GVL building. · The Contractor shall remove the stagnant milky water near future bioplant and LTP sump pit and treat as chemical waste. · The Contractor shall dispose of the construction waste accumulated near buttress wall regularly. · The Contractor shall remove the general refuse near future bioplant to reduce odour and pest issues.
12 March 2020	· The Contractor shall remove the deposited silt and grit in the DP4T channel near buttress wall to ensure the channel is functioning properly. · The Contractor shall replace the faded NRMM label on the excavator near DP4T channel. · The Contractor shall provide drip tray for the chemical placed near buttress wall. · The Contractor shall store the construction waste accumulated near buttress wall in refuse skips and dispose of the waste regularly.
19 March 2020	· The Contractor shall maintain the drain along Western site boundary and dispose of the general refuse and chemical waste accumulated in the drain separately. · The Contractor shall replace the faded NRMM labels on the bulldozer and roller near sediment trap. · The Contractor shall provide drip tray for the chemical placed near future GVL building. · The Contractor shall avoid accumulation of stagnant water in X10a channel and around future GVL building. · The Contractor shall remove the general refuse near future LFG plant and at DP6 channel.
26 March 2020	· The Contractor shall replace the faded NRMM label displayed on the air compressor near buttress wall. · The Contractor shall clear the oil spillage at the drip tray near DP6 channel and treat the clean-up materials as chemical waste. · The Contractor shall provide drip trays for chemicals placed near DP4T channel and future laboratory building. · The Contractor shall avoid accumulation of stagnant water in the sump pit near future LTP and treat the water before discharge. · The Contractor shall store general refuse separately from construction waste in the refuse skip near DP4T channel. · The Contractor shall dispose of the waste accumulated near buttress wall regularly.

The Contractor has rectified all of the observations identified during environmental site inspections in the reporting period.  Key environmental deficiencies identified and the corresponding rectification actions are presented in Table 2.11.

Table 2.11     Summary of Environmental Deficiencies Identified and Corresponding Additional Control Measures

Deficiencies	Rectifications Implemented	Proposed Additional Control Measures
Surface Water
Intercepting channels & drainage system	Ÿ Reviewed drainage plan.	Ÿ Provision of additional drainage channels. Ÿ Expedite the construction of permanent sediment trap and discharge culverts.
DP channels (design & regular silt removal)	Ÿ Carried out regular maintenance and cleaning of channels. Ÿ DP4 channel: Area near the channel was paved with concrete and a bund was built. Ÿ DP6 channel: Gravel piles on the channel were covered with concrete which serve as blocks for running water and to divide the channel into several sections.  A pump was placed in the water zone in the upstream section to pump water to the Wetsep for treatment prior to the discharge to the last section before the weir plate.   Ÿ DP6: Pipes through the gravel piles between different channel sections were covered with geotextiles to block debris and silt.	N.A.
Stockpiles & exposed soil	Ÿ Installed silt fencing near surface water channel along DP6 channel.	Ÿ Improve soil covering. Ÿ Compaction and cover for stockpiles and soil slopes.
Wetsep (treatment capacity & number)	Ÿ Reviewed Wetsep capacity. Ÿ Chemicals dosage of the Wetsep was increased to enhance the efficiency.	Ÿ Install additional Wetsep.
Backflow / ponding during heavy rainfall	Ÿ Raised with EPD (LDG) and CEDD.	N.A.

2.6 Waste Management Status

The Contractor has registered as a chemical waste producer under the Contract.  Sufficient numbers of receptacles were available for general refuse collection and sorting.

As informed by the Contractor, waste generated during this reporting period include mainly inert C&D materials.  Reference has been made to the waste flow table prepared by the Contractor.  The quantities of different types of wastes and imported fill materials are summarised in Table 2.12.

Table 2.12      Quantities of Different Waste Disposed and Imported Fill Materials

Month/ Year	Inert C&D Materials ^(a) (in ‘000m^3)	Imported Fill (in ‘000kg) ^(b)		Inert Construction Waste Re-used (in ‘000m^3)	Non-inert Construction Waste ^(c) (in ‘000m^3)	Recyclable Materials ^(d)  (in ‘000kg)	Chemical Wastes (in ‘000kg)
		Rock	Soil
January 2020	0.583	0	1742.440	0	0.122	0	0
February 2020	0.260	0	1992.480	0	0.076	0	0.195
March 2020	0.093	0	0	0	0.138	0	0
Notes: (a) Inert construction wastes include hard rock and large broken concrete, and materials disposed as public fill.  Density assumption: 1.6 (t/m^3) for public fill. (b) Imported fill refers to materials generated from other project for on-site resue. (c) Non-inert construction wastes include general refuse disposed at landfill. Density assumption: 0.9 (t/m^3) for general refuse. (d) Recyclable materials include metals, paper, cardboard, plastics and others.

2.7 Implementation Status of Environmental Mitigation Measures

A summary of the Environmental Mitigation Implementation Schedule is presented in Annex B.  The necessary mitigation measures were implemented properly for the Project.

2.8 Summary of Exceedances of the Environmental Quality Performance Limit

The 24-hour TSP monitoring results and construction noise monitoring results complied with the Action and Limit Levels in the reporting period.  One exceedance of the Limit Level for SS was recorded for surface water quality impact monitoring in the reporting period.  The SS exceedance at DP4 (Future, temporary) on 20 February 2020 was considered not Project-related upon further investigation.

Cumulative statistics on exceedances is provided in Annex G.

2.9 Summary of Complaints, Notification of Summons and Successful Prosecutions

There were no complaints, notification of summons or prosecution recorded in the reporting period.

Statistics on complaints, notifications of summons and successful prosecutions are summarised in Annex G.

3 Conclusion and Recommendation

This Quarterly EM&A Report presents the findings of the EM&A activities undertaken during the period from 1 January to 31 March 2020 in accordance with the updated EM&A Manual and the requirements of the Environmental Permit (EP-308/2008/B).

Air quality (24-hour TSP), noise and water quality (DO, pH and SS) monitoring were carried out in the reporting period.  Results for air quality monitoring (24-hour TSP) complied with the Action and Limit Levels in the reporting period.  No Action and Limit Levels exceedances were recorded for construction noise monitoring.  One exceedance of the Limit Level for SS was recorded for surface water quality impact monitoring in the reporting period.  The SS exceedance at DP4 (Future, temporary) on 20 February 2020 was considered not Project-related upon further investigation.

Twelve environmental site inspections were carried out during the reporting period.  Environmental deficiencies were identified during the site inspection and the Contractor has proposed additional control measures to rectify the deficiencies.

There were no complaints, notification of summons or prosecution recorded in the reporting period.

It is noted that most environmental pollution control and mitigation measures were properly implemented and the construction activities of the Project did not introduce any adverse impact to the sensitive receivers in the reporting period.  Yet, some environmental deficiencies were identified during the reporting period and additional control measures have been proposed by the Contractor to rectify the corresponding deficiencies.  The monitoring programme has been reviewed and was considered as adequate to cater for the nature of works in progress.  Change to the monitoring programme was thus not recommended at this stage.  The monitoring programme will be evaluated as appropriate in the next reporting period.  The ET will keep track on the construction works to confirm compliance of environmental requirements and the proper implementation of all necessary mitigation measures.

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([1])     ERM (2018).  South East New Territories (SENT) Landfill Extension: Environmental Monitoring & Audit Manual

([2])     ERM (2007).  South East New Territories (SENT) Landfill Extension – Feasibility Study: Environmental Impact Assessment Report