Appendix A	Tentative Construction Programme
Appendix B	Project Organization Structure
Appendix C	Project Implementation Schedule of Environmental Mitigation Measures
Appendix D	Calibration Certificates of Equipment and Certificates of HOKLAS Laboratory
Appendix E	Monitoring Schedules
Appendix F	Air Quality Monitoring Results and their Graphical Presentations
Appendix G	Wind Speed and Direction from Hong Kong Observatory
APPENDIX H	Event and Action Plan
APPENDIX I	Water Quality Monitoring Results and their Graphical Presentation
APPENDIX J	Monthly Summary Waste Flow Table
APPENDIX K	Cumulative Statistics on Complaints, Notification of Summons and Successful Prosecutions

Executive Summary

The Hung Shui Kiu Effluent Polishing Plant (HSKEPP) (hereinafter referred to as “the Project”) is to provide sewage treatment to the sewage collected from the Hung Shiu Kiu / Ha Tsuen New Development Area (HSK/HT NDA) and other developments in the North West New Territories (NWNT), and to subsequently dispose the treated effluent.

The Environmental Impact Assessment (EIA) Report and its Environmental Monitoring and Audit (EM&A) Manual (Register No. AEIAR-240/2022) for HSKEPP was approved on 19 October 2022, with an Environmental Permit (EP) granted on 19 October 2022 (EP No. EP-608/2022) under the Environmental Impact Assessment Ordinance (EIAO).

The construction was commenced on 6 September 2024. This is the 4^th EM&A report documents the findings of EM&A works conducted during the period from 1 to 31 December 2024.

EM&A Activities Summary

A summary of the EM&A activities in this reporting month is listed below:

EM&A Activities	Date
Air Quality Monitoring	5, 11, 16, 21 and 27* December 2024
Water Quality Monitoring	2, 5, 7, 9, 11, 13, 16, 18, 21, 23, 25, 27 and 30 December 2024
Environmental Site Inspection	6, 12, 19 and 23 December 2024

Notes(*): The Air Quality Impact Monitoring at AM3 is suspended from 7 Nov 2024 due to the construction works of other project at AM3.

Breaches of Action and Limit Levels for Air Quality

No exceedance of the Action / Limit Level of 1-hour Total Suspended Particulates (TSP) was recorded in the reporting month. Details are provided in Appendix F.

Breaches of Action and Limit Levels for Water Quality

No exceedance of the Action / Limit Level of water quality monitoring was recorded in the reporting month. Details are provided in Appendix I.

Complaint, Notification of Summons and Successful Prosecution

No environmental complaint, notification of summons and successful prosecution were received in the reporting month.

Reporting Changes

There was no reporting change in the reporting month.

Future Key Issues

Key issues to be considered in the next three months included the following.

Site

Construction Activities

Contract No. DC/2023/15

Site Formation Works for Hung Shui Kiu

Effluent Polishing Plant Phase 1

- Construction of Hoarding

- Demolition Works

Potential environmental impacts arising from the above construction activities are mainly associated with construction dust, water quality and waste management.

1 Introduction

WSP (Asia) Limited (WSP) was appointed by Drainage Services Department (DSD) as the Environmental Team (ET) to undertake the Environmental Monitoring and Audit (EM&A) programme during construction phase of the Hung Shui Kiu Effluent Polishing Plant (HSKEPP) (hereinafter referred to as “the Project”).

1.1 Purpose of the Report

1.1.1 The Environmental Monitoring and Audit (EM&A) programme for the Project commenced on 6 September 2024. This is the 4^th EM&A Report for the Project which summarises the impact monitoring results and audit findings for the Project during the period from 1 to 31 December 2024.

1.2 Report Structure

1.2.1 This monthly EM&A Report is organized as follows:

(a) Section 1: Introduction

(b) Section 2: Project Information

(d) Section 4: Implementation Status of Environmental Mitigation Measures

(e) Section 5: Monitoring Results

(f) Section 6: Environmental Site Inspection and Audit

(g) Section 7: Environmental Non-conformance

(h) Section 8: Future Key Issues

(i) Section 9: Conclusions and Recommendations

2 Project information

2.1 Background

2.1.1 The Hung Shui Kiu Effluent Polishing Plant (HSKEPP) (the Project) which is located in the north-western side of the Hung Shiu Kiu / Ha Tsuen New Development Area (HSK/HT NDA). It is designed to provide reliable, adequate and quality sewage treatment and sewage effluent disposal for the sewage collected from the new developments within the HSK/HT NDA and other developments on the North West New Territories (NWNT).

2.1.2 An Environmental Impact Assessment (EIA) study for the Project was conducted in accordance with EIA Study Brief No. ESB- 312/2019. The EIA Report and Environmental Monitoring and Audit (EM&A) Manual (Register No. AEIAR – 240/2022) were approved on 19 October 2022 under the Environmental Impact Assessment Ordinance (EIAO), with an Environmental Permit (EP) granted on 19 October 2022 (EP No. EP-608/2022).

2.1.3 According to the approved EM&A Manual of HSKEPP, the EM&A monitoring for the Project includes air quality monitoring and water quality monitoring. Baseline dust and water quality monitoring for HSKEPP was carried out within 24 June 2024 and 20 July 2024.

2.2 General Description of the Project

2.2.1 The key elements of this Project comprise below:

(a) Demolition of existing structures and buildings within San Wai Preliminary Treatment Works (SWPTW) for construction of HSKEPP facilities;

(b) Construction of a sewage treatment plant with a maximum capacity of Average Dry Weather Flow (ADWF) up to 90,000 m3/day;

(c) Construction of sludge treatment facilities for treating sludge generated from Hung Shui Kiu (HSK) Effluent Polishing Plant (EPP) and additional sludge generated from the San Wai Sewage Treatment Works (STW) and other nearby STWs;

(d) Construction of facilities for receiving and co-digesting pre-treated food or organic wastes;

(e) Construction of effluent discharge pipe connecting to the existing discharge tunnel of San Wai STW; and

(f) Associated ancillary works.

2.2.2 The layout plan of the Project is shown in Figure 2.1.

2.3 Construction Programme and Activities

2.3.1 The major construction activities undertaken in the reporting month are summarised below:

Table 2.1 Summary of Major Construction Activities in the Reporting Period

Site

Construction Activities

Contract No. DC/2023/15

Site Formation Works for Hung Shui Kiu Effluent Polishing Plant Phase 1

- Site Clearance

- Construction of Hoarding

- Environmental SI Works

2.3.2 The tentative construction programme is presented in Appendix A.

2.4 Project Organization

2.4.1 The project organization structure is shown in Appendix B. The key personnel contact names and numbers for the Project are summarized in Table 2.2.

Table 2.2 Contact Information of Key Personnel

Party	Role	Position	Name	Telephone
DSD	Project Proponent	Engr/6 (Harbour Area Treatment Scheme)	Mr. Gabriel Lau	2159 3410
AECOM	Engineer’s Representative	Associate	Ms. Yanning Zhang	5315 1068
ERM	Independent Environmental Checker (IEC)	Independent Environmental Checker	Ms. Mandy To	2271 3313
Adrian Construction Limited	Contractor	Environmental Officer	Mr. Tak-chi Tsoi	9226 6337
WSP	Environmental Team (ET)	ET Leader	Mr. Squall Lam	2579 8841

2.5 Status of Environmental Licences, Notification and Permits

2.5.1 Relevant environmental licenses, permits and/or notifications on environmental protection for the Project and valid in the reporting month are summarized in Table 2.3.

Table 2.3 Status of Environmental Licenses, Notification and Permits

Permit / License No. / Notification/ Reference No.	Valid Period		Status	Remarks
Permit / License No. / Notification/ Reference No.	From	To	Status	Remarks
*Environmental Permit*
EP-608/2022	19 Oct 2022	-	Valid	EP-608/2022
*Wastewater Discharge License*
10009181 (Reference No.) WT00045594-2024	21 Nov 2024	30 Nov 2029	Valid	Date of Inspection by EPD: 4th October 2024
*Chemical Waste Producer Registration*
5213-511-A3217-01	25 Jul 2024	-	Valid	-
*Billing Account for Construction Waste Disposal*
7051624	29 Jul 2024	-	Valid	-
*Notification Under Air Pollution Control (Construction Dust) Regulation*
-	-	-	-	Notification has been submitted to EPD on 5 July 2024

3 Environmental Monitoring Requirement

3.1 Construction Dust Monitoring

Monitoring Requirements

3.1.1 In accordance with the approved EM&A Manual, 1-hour Total Suspended Particulates (TSP) level at the designated air quality monitoring station is required. Impact 1-hour TSP monitoring should be carried out for at least three times in every six-days at the designated monitoring stations. The Action and Limit Level of the air quality monitoring is provided in Table 3.1.

Table 3.1 Action and Limit Levels for 1-hour TSP

ID	Location	Action Level	Limit Level
AM1	Tseung Kong Wai	263.0 mg/m³	500 mg/m³
AM2	Farm House	260.6 mg/m³	500 mg/m³
AM3	Planned Port Back-up, Storage and Workshop	263.4 mg/m³	500 mg/m³

Monitoring Equipment

3.1.2 1-hour TSP air quality monitoring was performed using portable direct reading dust meter located at the designated monitoring stations. Portable direct reading dust meters used for the monitoring were proven to IEC to be capable of achieving comparable result as that of the dust meter and thus were used for sampling. The portable direct reading dust meters meet all the requirements of the EM&A Manual. Brand and model of the equipment is given in Table 3.2. Their latest calibration certificates of the portable direct reading dust meter are provided in Appendix D.

Table 3.2 Air Quality Monitoring Equipment

Equipment	Brand and Model
Portable direct reading dust meter (1-hour TSP)	TSI Handheld TSP Meter (Model No. AM520; S/N: 5201735004)
	TSI Handheld TSP Meter (Model No. AM520; S/N: 5201735006)
	TSI Handheld TSP Meter (Model No. AM520; S/N: 5202345003)

Monitoring Locations

3.1.3 The monitoring station for construction dust monitoring pertinent to the Project has been identified based on the approved EM&A Manual for HSKEPP of the Project. The location of the construction dust monitoring stations is summarised in Table 3.3 and shown in Figure 3.1.

Table 3.3 Locations of Construction Dust Monitoring Station

Monitoring Location ID⁽¹⁾	Dust Monitoring Location
AM1	Tseung Kong Wai
AM2	Farm House
AM3⁽²⁾	Planned Port Back-up, Storage and Workshop

Note:

(1) 1-hour TSP impact monitoring should be conducted at the monitoring stations when there are Project-related major construction activities including site formation and piling works being undertaken within a radius of 500m from the monitoring stations.

(2) According to ET’s monitoring team, AM3 was blocked on 1 November 2024 for construction works. Based on the communications among ET, DSD, IEC and EPD, all parties have no comment on the suspension of air quality impact monitoring at AM3 until the construction works at AM3 is completed. Details can be referred to Appendix L of the Monthly EM&A Report (November 2024).

3.1.4 Air Quality Impact Monitoring at AM3 was temporarily suspended starting from 7 Nov 2024 and would be resumed after the completion of construction of the planned Port Back-up, Storage and Workshop use. Details of the suspension is presented in Appendix L of the Monthly EM&A Report (November 2024).

Monitoring Methodology

3.1.5 The 1-hour TSP was sampled by drawing air into the portable dust monitor where particular concentrations were measured instantaneously with an in-built silicon detector sensing light scattered by the particulates in the sampled air. Continuous TSP levels were indicated and logged by a built-in data logger compatible with Windows based program to facilitate data collection, analysis and reporting.

Field Monitoring

3.1.6 The measuring procedures of the 1-hour dust meter was undertaken in accordance with the Manufacturer’s Instruction Manual as follows:

(a) Power on the meter

(b) Check the data and time

(d) Select the “Calibration” from the menu

(e) Plug in the zero calibration filter to the meter

(f) Select the “Zero Cal” and run it

(g) Back to main menu and select the “Run Mode/Manual Mode”

(h) Press “Enter” to start the sampling

(i) When sampling is completed, press the “Enter” to stop the sampling

(j) Back to the main menu and select the “Data”

(k) Select the “Statistic” and read back the last memory record

3.1.7 Adoption of the wind data from the existing automatic wind station, i.e. Lau Fau Shan, operated by Hong Kong Observatory (HKO) rather than setting up wind data monitoring equipment is based on the following justifications:

· Lau Fan Shan automatic wind station is located in the vicinity of the designated monitoring locations. This Automatic wind station (22°28'08", 113°59'01") is located at the north of the Project and the anemometer is set up at 31m above mean sea level. It is clear of obstructions or turbulence caused by the buildings;

· This automatic wind station was considered as the closest wind station to the Project that could provide representative wind data in Hung Shui Kiu areas; and

· Wind data collected by HKO was considered as a reliable data source for the wind data, it is widely used in many EM&A Projects (e.g. Expansion of Hong Kong International Airport into a Three-runway System, Siu Ho Wan Station and Siu Ho Wan Depot Replanning Works – Advance Construction Works). The dataset is more accurate and reliable that could be downloaded periodically with real-timed data logger.

3.1.8 The data collected from Lau Fau Shan was used to check the wind speed and wind direction. Details of the collected wind data were presented in Appendix G.

Maintenance and Calibration

3.1.9 The portable direct reading dust meter is calibrated every year against high volume sampler (HVS) to check the validity and accuracy of the results measured by direct reading method.

Data Management and data qa/qc control

3.1.10 All monitoring data will be handled by the ET’s in-house data recording and management system. The monitoring data recorded in the equipment will be downloaded directly from the equipment at the end of each monitoring day. The downloaded monitoring data will input into a computerized database maintained by the ET. The laboratory results will be input directly into the computerized database and checked by personnel other than those who input the data.

3.1.11 For monitoring parameters that require laboratory analysis, the local laboratory shall follow the QA/QC requirements as set out under the HOKLAS scheme for the relevant laboratory tests.

Monitoring Schedule for the Reporting Month

3.1.12 The schedule for dust monitoring conducted in December 2024 is provided in Appendix E.

3.2 Water Quality Monitoring

Monitoring Requirements

3.2.1 In accordance with the approved EM&A Manual and EP, baseline water quality monitoring was undertaken to establish the baseline water quality levels at the designated monitoring stations. The stream water quality monitoring was conducted 3 days per week, with sampling/measurement at all designated monitoring stations including control station as specified in Table 3.7.

3.2.2 Measurements at the C1 and M1 stations for construction stage at were taken. Water depths, namely, 1m below water surface, mid-depth and 1m above sea/river bed, except where the water depth less that 6m, in which case the mid-depth station may be omitted. Should the water depth be less than 3m, only the mid-depth station will be monitored. The Action and Limit Level of the water monitoring is provided in Table 3.4.

Table 3.4 Action and Limit Levels for Water Quality

Parameter	Station M1
Parameter	Action Level	Limit Level
DO in mg/L	3.8	3.7
Turbidity in NTU	17.2 OR 120% of upstream control station(s) at the same tide of the same day, whichever is higher	17.7 OR 130% of upstream control station(s) at the same tide of the same day, whichever is higher
SS in mg/L	25 OR 120% of upstream control station(s) at the same tide of the same day, whichever is higher	26 OR 130% of upstream control station(s) at the same tide of the same day, whichever is higher

Monitoring Parameters

3.2.3 Dissolved Oxygen (DO), Salinity, Temperature, pH, and Turbidity should be monitored at designated water quality monitoring stations. All parameters should be measured in-situ whereas suspended solids (SS) should be determined by the laboratory. DO should be presented in mg/L and in % saturation.

3.2.4 Other relevant data should also be recorded, including monitoring location / position, time, weather conditions and any special phenomena or work underway at the construction site during the monitoring.

Monitoring equipment

3.2.5 Based on the approved EM&A Manual, the monitoring equipment in Table 3.5 were used for the in-situ measurement of water quality. A copy of the calibration certificates for the water quality monitoring equipment are provided in Appendix D.

Table 3.5 Water Quality Monitoring Equipment

Equipment	Model
DO and Temperature Meter, Salinity Meter, pH meter and Turbidimeter	YSI ProDSS Multi Parameters
Serial Number	1. 21K101468 2. 21K101469 3. 21G105356
Water Depth Sensor	Xyorca XY-453 (S/N: OA35000025)
Water Sampler	1120-1180 Vertical Alpha^TM Bottles

Monitoring methodology

Dissolved Oxygen and Temperature Measuring Instrument

3.2.6 The instrument is a portable and weatherproof DO measuring instrument complete with cable and sensor and use a DC power source. The equipment is capable of measuring:

· a DO-level in the range of 0 - 20 mg/L and 0 - 200% saturation; and

· a temperature of 0 - 45 degree Celsius

3.2.7 It has a membrane electrode with automatic temperature compensation complete with a cable. Sufficient stocks of spare electrodes and cables should be available for replacement where necessary. (For example, YSI model 59 meter, YSI 5739 probe, YSI 5795A submersible stirrer with reel and cable or an approved similar instrument).

3.2.8 Salinity compensation was not built-in to the DO equipment, in-situ salinity measured to calibrate the DO equipment prior to each DO measurement.

Turbidity Measuring Instrument

3.2.9 Turbidity measured in-situ by the nephelometric method. The instrument is portable and weatherproof using a DC power source complete with cable, sensor and comprehensive operation manuals. It has a photoelectric sensor capable of measuring turbidity between 0 - 1000 NTU (for example, Hach model 2100P or an approved similar instrument). The cable is not less than 25m in length. The meter calibrated in order to establish the relationship between NTU units and the levels of suspended solids. The turbidity measurement carried out on split water sample collected from the same depths of suspended solids samples.

Sampler

3.2.10 A water sampler is required. It comprises a transparent PVC cylinder, with a capacity of not less than 2 litres, which can be effectively sealed with latex cups at both ends. The sampler have a positive latching system to keep it open and prevent premature closure until released by a messenger when the sampler is at the selected water depth (for example, Kahlsico Water Sampler or an approved similar instrument).

Water Depth Detector

3.2.11 A portable, battery-operated echo sounder shall be used for the determination of water depth at each designated monitoring station. This unit can either be hand-held or affixed to the bottom of the work boat, if the same vessel is to be used throughout the monitoring programme.

Salinity Measuring Equipment

3.2.12 A portable salinometer capable of measuring salinity in the range of 0 - 40 parts per thousand (ppt) provided for measuring salinity of the water at each monitoring location.

pH Measuring Equipment

3.2.13 The instrument consists of a potentiometer, a glass electrode, a reference electrode and a temperature-compensating device. It is readable to 0.1 pH in a range of 0 to 14. Standard buffer solutions of at least pH 7 and pH 10 used for calibration of the instrument before and after use. Details of the method should comply with American Public Health Association (APHA), 19th Edition 4500-HTB.

Sample Containers and Storage

3.2.14 Water samples for SS determination stored in high density polythene bottles with no preservative added, packed in ice (cooled to 4°C without being frozen) and delivered to the laboratory and analysed as soon as possible after collection. Sufficient volume of samples collected to achieve the detection limit.

calibration of in-situ instruments

3.2.15 All in-situ monitoring instruments checked, calibrated and certified by a laboratory accredited under HOKLAS or any other international accreditation scheme before use and subsequently re-calibrated at 3 monthly intervals throughout all stages of the water quality monitoring. Responses of sensors and electrodes checked with certified standard solutions before each use. Wet bulb calibration for a DO meter carried out before measurement at each monitoring location.

3.2.16 Sufficient stocks of spare parts shall be maintained for replacements when necessary. Backup monitoring equipment shall also be made available so that monitoring can proceed uninterrupted even when some equipment is under maintenance, calibration, etc.

laboratory measurement/analysis

3.2.17 Analysis of SS levels shall be carried out in a HOKLAS or another international accredited laboratory. Sufficient water samples (i.e. not less than 2 litres) collected at the monitoring stations for carrying out the laboratory determinations, with detection limit shown in Table 3.6. All samples assigned a unique code and accompanied by Chain of Custody (COC) sheets.

3.2.18 The SS determination work start within 24 hours after collection of the water samples. The analyses follow the standard methods according to Table 3.6 and as described in “American Public Health Association (APHA) Standard Methods for the Examination of Water and Wastewater”, 19th edition, unless otherwise specified.

Table 3.6 Analytical Methods to be applied to Water Quality Samples

Determinant	Standard Method	Detection Limit
Suspended Solids (mg/L)	APHA 2540 D	2 mg/L

3.2.19 For the purpose of QA/QC, all QA/QC results including blank, spike recovery, number of duplicate samples per batch, etc. reported in accordance with the requirement of HOKLAS or international accredited scheme. detection limits and accuracy submitted to EPD for approval prior to the commencement of monitoring programme. EPD may also request the laboratory to carry out analysis of known standards provided by EPD for quality assurance.

3.2.20 Additional duplicate samples may require by EPD for inter laboratory calibration. Remaining samples after analysis kept by the laboratory for 3 months in case repeat analysis is required. If in-house or non-standard methods are proposed, details of the method verification may also require submitting to EPD. In any circumstance, the sample testing has comprehensive quality assurance and quality control programmes. The laboratory prepares to demonstrate the programmes to EPD or his representatives when requested.

Monitoring Locations

3.2.21 The monitoring station for water quality monitoring pertinent to the Project has been identified based on the approved EM&A Manual for HSKEPP of the Project. The location of the water quality monitoring stations is shown in Table 3.7 and shown in Figure 3.2.

Table 3.7 Locations of Water Quality Monitoring Stations

Monitoring Station No.	Description	Coordinates
Monitoring Station No.	Description	Easting	Northing
C1	Control Station at upstream location of construction site for stream water quality monitoring during construction phase	816278	834038
M1	Impact station at downstream location of construction site for stream water quality monitoring during construction phase	816571	833970

Monitoring schedule for the reporting month

3.2.22 The schedule for water quality monitoring conducted in December 2024 is provided in Appendix E.

4 IMPLEMENTATION status of ENVIRONMENTAL mitigation measures

4.1.1 The Contractor has implemented environmental mitigation measures and requirements as stated in the EIA report, the EP and EM&A Manual. The implementation status of the environmental mitigation measures during the reporting period is summarized in Appendix C.

5 Monitoring RESULTS

5.1 Construction Dust Monitoring

5.1.1 According to the approved EM&A manual, 1-hour TSP impact monitoring should be conducted at the monitoring stations when Project-related major construction activities being undertaken within a radius of 500m from the monitoring stations.

5.1.2 The dust monitoring results for 1-hour TSP are summarised in Table 5.1 and the monitoring data with the graphical plots are presented in Appendix F. The wind speed and wind direction data obtained from the Lau Fan Shan Automatic Wind Station operated by Hong Kong Observatory are presented in Appendix G.

Table 5.1 Summary of 1-hour TSP Monitoring Result in the Reporting Period

ID	Average (mg/m³)	Range (mg/m³)	Action Level (mg/m³)	Limit Level (mg/m³)
AM1	153.9	77 – 238	263.0	500
AM2	150.2	79 – 200	260.6	500
AM3⁽¹⁾	Not available	Not available	263.4	500

Note:

(1) Air Quality Impact Monitoring at AM3 was temporarily suspended starting from 7 Nov 2024 and would be resumed after the completion of construction of the planned Port Back-up, Storage and Workshop use.

5.1.3 No Action and Limit Level exceedance were recorded for 1-hour TSP monitoring in the reporting month.

5.1.4 The event and action plan is annexed in Appendix H.

5.1.5 Major dust sources during the monitoring included construction dust, nearby traffic emission and other nearby construction sites.

5.2 Water Quality Monitoring

5.2.1 According to the approved EM&A manual, water quality monitoring at designated locations are proposed to be carried out during the construction phase to monitor any sub-standard water discharge into the nearby water bodies from the HSKEPP.

5.2.2 The water quality monitoring results are summarized in Table 5.2. The monitoring data with graphical plots and their corresponding Action and Limit levels are provided in Appendix I.

Table 5.2 Summary of Water Quality Monitoring Results in the Reporting Period

Parameters	Monitoring Station ID
Parameters	M1
Dissolved Oxygen (mg/L)	6.3 – 8.2
Turbidity (NTU) (Depth-averaged)	1.7 – 7.6
Suspended Solid (mg/L) (Depth-averaged)	<2 – 8

5.2.3 No Action and Limit Level exceedance were recorded for water quality monitoring in the reporting month.

5.2.4 The event and action plan is annexed in Appendix H.

5.3 Waste Management

5.3.1 C&D materials and wastes sorting were carried out on site. Receptacles were available for C&D wastes and general refuse collection.

5.3.2 As advised by the Contractor, no inert C&D materials were generated in the reporting month. No inert C&D materials were reused in other projects or in the Contract in the reporting month. No general refuse and yard waste was disposed of in the reporting month. No paper / cardboard packaging, plastic wastes and metals were generated and disposed in the reporting period. The waste flow table for different wastes in this reporting month is presented in Table 5.3 and the cumulative waste flow table is annexed in Appendix J.

Table 5.3 Quantities of Waste Generated and Disposal Location in the Reporting Period

Dec 2024	Quantities of Waste
	Inert C&D Materials (in ‘000 kg)		Chemical Waste (in ‘000 L)	Non-inert C&D Materials
				Others, e.g. General Refuse (in ‘000 kg)	Recycled Materials
				Others, e.g. General Refuse (in ‘000 kg)	Paper (in ‘000 kg)	Plastics (in ‘000 kg)	Metals (in ‘000 kg)	Yard Waste (in ‘000 kg)
	0	0	0	0	0	0	0	0
Disposal Locations	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A

5.3.3 The Contractor is advised to properly maintain on site C&D materials and wastes collection, sorting and recording system and maximize reuse / recycle of C&D materials and wastes.

5.4 Landscape and Visual

5.4.1 Site inspection was undertaken by the ET at least once every month during the construction period (i.e. 12 December 2024). Site inspection and implementation Schedule of Environmental Mitigation Measures is provided in Appendix C. The observations and recommendations made during the site inspections are presented in Table 6.1.

6 Environmental site inspection and audit

6.1.1 Site inspections were carried out on a weekly basis to monitor the implementation of proper environmental pollution control and mitigation measures for the Project. A summary of the mitigation measures implementation schedule is provided in Appendix C.

6.1.2 In the reporting month, 4 site inspections were carried out on 6, 12, 19 and 23 December 2024. Joint inspections with the IEC, ER, the Contractor and the ET were conducted on 12 December 2024. No non-compliance was recorded during the site inspection. Details of observations recorded during the site inspections are presented in Table 6.1.

Table 6.1 Observation and Recommendations of Site Audit

Parameters	Date	Observations and Recommendations	Follow-up
Air Quality	N. A.	Nil	Nil
Noise	N. A.	Nil	Nil
Water Quality	N. A.	Nil	Nil
Waste/ Chemical Management	12 Dec 2024	It is observed that missing drip tray for chemical containers. The contractor is advised to provide a drip tray for chemical containers. (Observation)	Chemical containers have been provided with drip tray.
Landscape & Visual	N. A.	Nil	Nil
Permits/ Licenses	N. A.	Nil	Nil

6.1.3 No follow-up actions were requested by Contractor's ET and IEC during the site inspection.

7 Environmental non-CONFORMANCE

7.1 Summary of Monitoring Exceedances

7.1.1 No Action and Limit Level exceedance was recorded for 1-hour TSP monitoring in reporting month.

7.1.2 No Action and Limit Level exceedance was recorded for water quality monitoring in reporting month.

7.1.3 Summary of Exceedance is provided in Table 7.1.

Table 7.1 Summary of Exceedance

Environmental Parameter		No. of Exceedance This Month		Exceedance due to Project Construction
Environmental Parameter		Action Level	Limit Level	Exceedance due to Project Construction
Air Quality (Construction Dust – 1-hour TSP)		0	0	0
Water Quality	Dissolved Oxygen	0	0	0
	Turbidity	0	0	0
	Suspended Solid	0	0	0
Total		0	0	0

7.2 Summary of Environmental Non-Compliance

7.2.1 No environmental non-compliance was recorded in the reporting month. Summary of Environmental Complaints, Summon and Successful Prosecution are provided in Table 7.2 and Appendix K respectively.

Table 7.2 Summary of Environmental Complaints, Summon and Successful Prosecution

	Total No. Received in this Reporting Month	Cumulative No. Received since Project Commencement
Environmental Complaints	0	0
Notification of Summons	0	0
Successful Prosecutions	0	0

8 Further Key Issues

8.1 Construction Programme for the Next Three Months

8.1.1 The major construction works between January 2025 to March 2025 will be:

Table 8.1 Major Construction for the Next Three Month

Location

Site Activities

Contract No. DC/2023/15

Site Formation Works for Hung Shui Kiu

Effluent Polishing Plant Phase 1

- Construction of Hoarding

- Demolition Works

8.2 Key Issues for the Coming Month

8.2.1 Potential environmental impacts arising from the above construction activities are mainly associated with construction dust, construction noise, water quality, waste management and landscape.

8.3 Monitoring Schedule for the Next Month

8.3.1 The tentative schedules for dust and water quality monitoring in January 2025 are provided in Appendix E.

9 Conclusion and Recommendation

9.1 Conclusions

9.1.1 No Action and Limit Level exceedance was recorded for 1-hour TSP monitoring in reporting month.

9.1.2 No Action and Limit Level exceedance was recorded for water quality monitoring in reporting month.

9.1.3 4 nos. of environmental site inspections were carried out in December 2024. Recommendations for environmental site improvement were given to the Contractor for the deficiencies identified during the site audit.

9.1.4 No environmental complaint, notification of summon and successful prosecution was received in the reporting month.

9.2 Recommendations

9.2.1 According to the environmental site inspections performed in the reporting month, the following recommendations were provided:

Air Quality Impact