0 |
Contents
12 Environmental Non-conformance
13 Implementation Status on Environmental Mitigation Measures
Figure
Figure 1 |
Location of the Project Site |
Figure 2 |
Impact Air Quality, Noise & Surface Water Monitoring Locations |
Figure 3 |
Landfill Gas Monitoring Locations |
Appendix
Appendix A |
Construction Programme |
Appendix B |
Project Organization Chart & Management Structure |
Appendix C |
Monitoring Schedule for Reporting Month & Next Month |
Appendix D |
Calibration Certificates |
Appendix E |
Monitoring Results |
Appendix F |
Graphical Presentations |
Appendix G |
Notification of Environmental Quality Limits Exceedance |
Appendix H |
Wind Data |
Appendix I |
Waste Flow Table |
Appendix J |
Joint Environmental Site Inspection Records |
Appendix K |
Environmental Mitigation Implementation Schedule (EMIS) |
Appendix L Appendix M Appendix N |
Construction Site Activities Mitigation Measures of Cultural Landscape Features Ecological monitoring record |
Appendix O |
Detail Status of FEP & EP Submission |
Appendix P |
Cumulative complaint / enquiry log, Summaries of complaints and enquiries & Environmental complaint reports |
Appendix Q |
Implementation Status on Environmental Mitigation Measures |
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 9th Monthly EM&A Report presents the EM&A works conducted from 1 to 31 August 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:
- Material loading and unloading, site traffic at Portion A, SBA to alternative disposal ground |
- Permanent site office foundation works with pouring of concrete at Portion D |
- Site clearance at Portion A, B2/E2, E3-1 & E4 |
- Installation of permanent fencing at Portion A, B1 & E4 |
- Site formation at Portion A & E3-1 |
- Tree felling at Portion B2/E1, E3-1 & E4 |
Environmental Monitoring and Audit Progress
A summary of the monitoring activities in this reporting period is listed below:
Times |
Date |
|
- Air Quality Monitoring during normal weekdays at each monitoring station |
5 times |
4, 10, 16, 22 & 28 August 2023 |
- Construction Noise Monitoring during normal weekdays at each monitoring station |
5 times |
4, 10, 16, 22 & 28 August 2023 |
- Surface Water Quality Monitoring during normal weekdays at each monitoring station |
1 time |
4 August 2023 |
- Landfill Gas Monitoring during normal weekdays for Construction Works |
27 times |
1 to 5, 7 to 12, 14 to 19, 21 to 26, 28 to 31 August 2023 |
- Post-transplantation monitoring and audit during normal weekdays for transplanted plants and receptor sites |
1 time |
11 August 2023 |
4 times |
7, 14, 21 & 28 August 2023 |
|
2 times |
4 & 21 August 2023 |
Environmental Exceedance
Air Quality, Noise & Landfill Gas Monitoring
No exceedance of the Action and Limit Levels were recorded at designated monitoring stations during the reporting period.
Surface Water Quality Monitoring
One DO exceedance of the Action Level was recorded at Surface Water Quality Monitoring (WQM) Location WM1 during the reporting period. The exceedance is not project related after the investigation. No exceedance of the Action and Limit Levels were recorded at Surface WQM Location WM2 during the reporting period.
Environmental Non-conformance/Compliant/Summons and Prosecution
No non-compliance event was recorded during the reporting period.
One Complaint received on 3 August 2023 was recorded during the reporting period. The complaint on 14 June 2023, enquiry on 15 June 2023 & complaint on 3 August 2023 were investigated by related parties. The Complaint for 14 June 2023 is not project related after investigation. The project is a part of factor causing the high turbidity muddy water for the enquiry on 15 June 2023 & complaint on 3 August 2023 after the investigation.
No summons/prosecutions were received in this reporting period.
Reporting Change
There was no reporting change in the reporting period.
Future Key Issues
Works to be undertaken in the next month include:
- Material loading and unloading, site traffic at Portion A, SBA to alternative disposal ground |
- Permanent site office foundation works with pouring of concrete at Portion D |
- Site clearance at Portion A & E3-1 |
- Installation of permanent fencing at Portion A, B1 & E4 |
- Site formation at Portion A & E3-1 |
- Tree felling at Portion E3-1 & E4 |
Potential environmental impacts arising from the above construction activities are mainly associated with air quality, construction noise, water quality, waste management, landfill gas monitoring, landscape and visual, cultural heritage and ecology.
1.1. Background
1.1.1. The North East New Territories Landfill Extension (the NENTX Project) is located adjacent to the existing North East New Territories (NENT) Landfill at Ta Kwu Ling. The extension site is located in a valley covering mainly the existing NENT Landfill Stockpile and Borrow Area that was formed to the east of the existing landfill as part of the original site development of the landfill, and layout plan shown in Figure 1.
1.1.2. The NENTX is a designated project. The Environmental Impact Assessment (EIA) Report (AEIAR-111/2007) and an Environmental Monitoring and Audit Manual were approved on 20 September 2007. The project is governed by an Environmental Permit (EP) (EP-292/2007) which was granted on 26 November 2007. A further of EP (FEP) was applied and the FEP (FEP-01/292/2007) was subsequently granted on 28 April 2022.
1.1.3. In accordance with the requirements specified in Section 2.6 to 2.10 and Section 12.3 of the approved Environmental Monitoring and Audit (EM&A) Manual and Environmental Permit (EP and FEP) condition 3.3, Monthly EM&A report should be submitted to the Director of Environmental Protection (DEP), within 2 weeks after the end of the reporting month. The submissions shall be certified by the Environmental Team (ET) Leader and verified by the Independent Environmental Checker (IEC).
1.1.4. The construction phase and EM&A programme of the Project commenced on 1 December 2022.
1.2. Nature, Scale and Scope of the captioned Designated Project
1.2.1 The Nature, Scale and Scope of the captioned Designated Project is presented in Table 1-1.
Table 1-1 Nature, Scale and Scope of the captioned Designated Project
Item(s) |
Content |
Nature of Designated Project |
Construction and operation of a landfill for waste as defined in the “Waste Disposal Ordinance” (Cap. 354) |
Scale and Scope of Designated Project |
The Project mainly consists of the followings: - Construction and operation of a landfill extension of about 70 hectares with a target void space of at least 19 million cubic metres on the eastern side of the existing NENT Landfill, including the followings: - i. Site formation and preparation; ii. Installation of liner system; iii. Installation of leachate collection, treatment and disposal facilities; iv. Installation of gas collection, utilization and management facilities; v. Utilities provisions and drainage diversion; vi. Landfilling operation; vii. Restoration and aftercare in subsequent stages; and viii. Measures to mitigate environmental impacts as well as environmental monitoring and auditing to be implemented. |
1.3. Purpose of this Report
1.3.1. This is the 9th Monthly EM&A Report which summarises the impact monitoring results and audit findings for the EM&A programme during the reporting period from 01 to 31 August 2023.
1.4.1. The structure of the report is as follows:
- 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
Section 5 – Water Quality Monitoring
Section 6 – Waste Management
Section 7 – Landfill Gas Monitoring
Section 8 – Landscape and Visual
Section 10 – Ecological Monitoring
Section 11 – Site Inspection and Audit
Section 12 – Environmental Non-Conformance
Section 13 – Implementation Status on Environmental Mitigation Measures
Section 14 – Future Key Issues
2.1.1. A summary of the major construction activities undertaken in this reporting period is shown in Appendix L. Construction programme is illustrated in Appendix A.
2.2. Project Organization & Management Structure
2.2.1. The Project Organization Chart & Management Structure are shown in Appendix B. The key personnel contact information is summarized in Table 2-1.
Table 2-1 Contact Information of Key Personnel
Party |
Name |
Contact Number |
Contractor (Veolia Environmental Service Hong Kong 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 2-2. 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 O.
Table 2-2 Status of Submissions required under the FEP & EP during reporting period
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 (CLG) |
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 13th post-transplantation monitoring (11 Aug 2023) |
2.9 |
2.11 |
Submission of Detailed Landfill Gas Hazard Assessment Report |
Submitted |
2.10 |
2.12 |
Submission of Waste Management Plan |
Submitted |
3.2 |
3.2 |
Submission of Baseline Monitoring Report |
Submitted |
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 FEP & EP is presented in Table 2-3.
Permit / Licenses / Notification |
Reference |
Expiry Date |
Remark |
Environmental Permit (EP) |
EP-292/2007 |
Throughout the Contract |
Permit granted on 26 November 2007 |
Further Environmental Permit (FEP) |
FEP-210/2022 |
Throughout the Contract |
Permit granted on 28 April 2022 |
Notification of Construction Works as required under Air Pollution Control (Construction Dust) Regulation |
479809 |
Throughout the Construction Phase |
Notified on 13 May 2022 |
Registration of Waste Producer under Waste Disposal Ordinance |
7043692 |
Throughout the Contract |
Registered on 13 April 2022 |
Registration as Chemical Waste Producer
|
5213-642-P1034-18 |
Throughout the Contract |
Registered on 11 July 2022 |
Construction Noise Permit |
GW-RN0619-23 |
22 September 2023 |
Permit granted on 16 June 2023 |
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) |
2.5. Environmental Monitoring and Audit Progress
2.5.1. A summary of the monitoring activities in this reporting period is presented in Table2-4.
Table 2-4 Summary of the Monitoring Activities in this reporting period
Items |
Times |
Date |
- Air Quality Monitoring during normal weekdays at each monitoring station |
5 times |
4, 10, 16, 22 & 28 August 2023 |
- Construction Noise Monitoring during normal weekdays at each monitoring station |
5 times |
4, 10, 16, 22 & 28 August 2023 |
- Surface Water Quality Monitoring during normal weekdays at each monitoring station |
1 time |
4 August 2023 |
- Landfill Gas Monitoring during normal weekdays for Construction Works |
27 times |
1 to 5, 7 to 12, 14 to 19, 21 to 26, 28 to 31 August 2023 |
- Post-transplantation monitoring and audit during normal weekdays for transplanted plants and receptor sites |
1 time |
11 August 2023 |
- Joint Environmental Site Inspection |
4 times |
7, 14, 21 & 28 August 2023 |
- General Site Inspection by EPD-RNG |
2 times |
4 & 21 August 2023 |
Air Quality
5 sets of 1-hr & 24-hr TSP construction dust measurement were carried out at each monitoring stations during normal weekdays of the reporting period. No Action / Limit Level exceedance for 1-hr & 24-hr TSP impact monitoring was recorded during the period.
Noise
5 sets of 30-minute construction noise measurement were carried out at each monitoring stations during normal weekdays of the reporting period. No exceedance of Action and Limit Levels of construction noise was recorded during the reporting period.
Groundwater
Site clearance of future landfilling area is in progress. The installation of groundwater monitoring boreholes will be installed after the site formation work of the landfilling area. The target commencement period of groundwater monitoring will be in 2026. No groundwater monitoring is required before the completion of site formation work of the landfilling area.
Surface Water Quality
1 set of surface water quality measurement were carried out at each monitoring stations during normal weekdays of the reporting period. One DO exceedance of Action Level of surface water quality at WM1 was recorded during the reporting period. No exceedance of Limit Level of surface water quality at WM1 were recorded during the reporting period. No exceedance of Action Levels and Limit Level of surface water quality at WM2 were recorded during the reporting period.
Landfill Gas
27 sets of landfill gas measurement were carried out at the designated monitoring locations during normal weekdays of the reporting period. No exceedance of Action and Limit Levels of landfill gas was recorded during the reporting period.
Landscape and Visual
All the specified and affected LCAs, LRs and VSRs have been monitored during the reporting period. No exceedance of Action and Limit Levels of landscape and visual was recorded during the reporting period.
Cultural Heritage
Implementation of the mitigation measures during construction phase of the Project has been monitored through the regular site inspection/audit.
Ecology
1 set of post-transplantation monitoring and audit for transplanted plants and receptor sites during normal weekdays of the reporting period was carried out. Implementation of the mitigation measures during construction phase of the Project has been monitored through the regular site inspection/audit.
Environmental Site Inspection
4 weekly environmental site inspections were carried out during the reporting period. A joint environmental site inspection was carried out by the representatives of the Employer's Representative (ER), the Contractor, IEC and the ET on 21 August 2023. The Contractor has generally implemented part of the mitigation measures as recommended. Two general site inspection on 4 & 21 August 2023 was conducted by Environmental Protection Department-Regional Office (North) (EPD-RNG).
3.1.1.1 In accordance with the EM&A Manual, 1-hr & 24-hr Total Suspended Particulates (TSP) levels should be measured at the designated air quality monitoring stations in every 6 days to ensure that any deteriorating air quality could be readily detected, and timely action shall be undertaken to rectify such situation. For 1-hr TSP monitoring, the sampling frequency of at least three times in every six-days should be undertaken when the highest dust impact occurs. The specific time to start and stop the 24- hr TSP monitoring shall be clearly defined for each location.
3.1.2 Monitoring Parameters, Frequency and Location
3.1.2.1 According to the EM&A Manual, three monitoring stations namely AM(D)1, AM(D)2 and AM(D)3 are selected for the impact monitoring.
3.1.2.2 A baseline monitoring plan has been submitted to IEC and EPD on 31 May 2022 including the proposal with justification of change of monitoring locations. Due to limited access to the original monitoring locations at AM(D)1, AM(D)2 and AM(D)3, the adjusted stations at AM1, AM2 and AM3 were agreed with IEC prior to the baseline and impact monitoring. The locations of adjusted dust monitoring locations are shown in Figure 2.
3.1.2.3 The detailed monitoring schedule is shown in Appendix C. The locations of dust monitoring stations are shown in Table 3-1. The monitoring parameters, frequency and duration are shown in Table 3-2.
Table 3-1 Locations of Dust Monitoring Stations
Monitoring Station |
Representative for |
Monitoring Parameters |
|
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 |
24-hr TSP |
1 time per 6 days |
3.1.3.1 High volume samplers (HVSs) were used for carrying out 24-hr TSP monitoring. For 1-hr TSP monitoring, direct reading dust meters were used to measure 1-hr TSP levels.
3.1.3.2 Table 3-3 summarises the equipment that were used in the dust monitoring programme. The calibration certificates are shown in Appendix D.
Table 3-3 Dust Monitoring Equipment
Equipment |
Model |
Expiry Date |
Monitoring Station |
High Volume Sampler (HVS) |
TE-5170X (S/N: 1105) |
5 Sep 2023 |
AM1 |
TE-5170X (S/N: 1106) |
AM2 |
||
TE-5170X (S/N: 1856) |
AM3 |
||
Direct Reading Dust Meter |
Sibata LD-5R (S/N: 0Z4545) |
2 Dec 2023 |
AM1 to AM3 |
Sibata LD-5R (S/N: 882106) |
|||
Sibata LD-5R (S/N: 882110) |
|||
Sibata LD-5R (S/N: 942532) |
|||
Calibration Kit (for HVS) |
TE-5025A (S/N: 4166) |
19 Jun 2024 |
AM1 to AM3 |
The Expiry Date of Calibration Kit (for HVS) reflected that the calibration certificate fulfils the bi-monthly calibration interval requirement for the HVS.
1-hr TSP Monitoring
3.1.4.1 The 1-hr TSP impact monitoring was conducted using a portable direct reading dust meter.
3.1.4.2 The measuring procedures of the 1-hr dust meter has been undertaken in accordance with the Manufacturer’s Instruction Manual as follows:
Procedure of starting monitoring
Procedure of setting measurement timer
3.1.4.3 The direct reading dust meters will be verified against calibrated high volume samples (HVSs) annually. A 2-day, three 3-hour measurement results per day from direct reading dust meter will be taken to compare with the sampling results from the HVS. The correlation between the direct reading dust meter and the HVS will then be concluded. By accounting for the correlation factor, the direct reading dust meter will be considered to achieve comparable results as that of the HVS.
3.1.4.4 All digital dust indicator will be calibrated with on-site HVS annually. Calibration certificate will be provided after calibration. The Calibration process shall eyewitness with the representative of ET & IEC.
3.1.4.5 Checklist of regular checking for digital dust meter will be conducted bi-weekly by environmental technician to ensure the all-digital dust meter are in good condition and submitted to supervisors. All checklists will be kept by supervisors.
3.1.4.6 Logbook is provided to environmental technician record the transferal of equipment to other colleagues, reporting to supervisors is required.
24-hr TSP Monitoring
3.1.4.7 The 24-hr TSP monitoring has been conducted using a High-Volume Sampler (HVS).
3.1.4.8 The HVS has been set-up at the monitoring location with a fixed power supply for operation. The measuring procedures of the 24-hr TSP measurements has been undertaken in accordance with the specifications listed in the EM&A Manual. Each HVS includes a motor, a filter holder, a flow controller and a sampling inlet in accordance with the performance specification of the USEPA Standard Title 40, Code of Federation Regulations Chapter 1 (Part 50), Appendix B. The measuring procedures of the 24-hr dust meter was undertaken in accordance with the Manufacturer’s Instruction Manual as follows:
3.1.4.9 In addition, site conditions and dust sources were recorded in a standard form for direct input into a database.
3.1.4.10 The high volume motors and their accessories should be properly maintained, including routine motor brushes replacement and electrical wiring checking, to ensure that the equipment and a continuous power supply were in good working condition.
3.1.4.11 Initial calibration of dust monitoring equipment shall be conducted upon installation and thereafter at bi-monthly intervals. The transfer standard shall be traceable to the internationally recognized primary standard and be calibrated annually.
The detail procedure of calibration of HVS is listed below:
1. Make sure the electrical circuit is connected properly. The motor should be directly connected to the power source.
2. Open the top cover and unlock the screws at the four corners.
3. Install the orifice and adapter plate to high volume air sample. Tighten the nut securely. Turn the knob of orifice clock-wise to close the four holes on the bottom open.
4. Hold the water manometer on the cover of mass flow controller vertically. Connect one side of a water manometer to the pressure tap on the side of the orifice with a rubber vacuum tube. Leave opposite side of the manometer open to the atmosphere.
5. Turn on the sampler
6. Five flow rates are achieved by changing the different plates to change the resistance. Record the manometer reading and the reading from continuous flow recorder. At least 5 sets of data should be recorded.
3.1.4.12 The Calibration process shall eyewitness with the representative of ET & IEC.
3.1.5.1 The impact dust monitoring results are summarized in Table 3-4 and Table 3-5. The monitoring data together with graphical presentations are presented in Appendix E and Appendix F.
Dust Monitoring Station |
Average 1-hr TSP Concentration, µg/m³ (Range) |
Action Level, µg/m³ |
Limit Level, µg/m³ |
AM1 |
33 (20 – 40) |
>285 |
>500 |
AM2 |
35 (29 – 40) |
>279 |
>500 |
AM3 |
39 (29 – 50) |
>285 |
>500 |
Dust Monitoring Station |
Average 24-hr TSP Concentration, µg/m³ (Range) |
Action Level, µg/m³ |
Limit Level, µg/m³ |
AM1 |
29 (19 – 37) |
>164 |
>260 |
AM2 |
33 (27 – 43) |
>152 |
>260 |
AM3 |
40 (27 – 63) |
>163 |
>260 |
3.1.5.2 The Summary of Impact 1-hr & 24-hr TSP Exceedance are shown in Table 3-6. The Notification of Environmental Quality Limits Exceedances are presented in Appendix G.
Dust Monitoring Station |
Parameter |
1-hr TSP |
24-hr TSP |
Exceedance Count |
Level Exceedance |
||||
AM1 |
Action |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
|
AM2 |
Action |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
|
AM3 |
Action |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
Remarks: * equal to non-project related
3.1.5.3 No Action / Limit Level exceedance for 1-hr & 24-hr TSP impact monitoring at AM1, AM2 & AM3 was recorded during the period.
3.1.6.1 During the monitoring period. wind data from existing weather station in the vicinity of the designated monitoring location, i.e Ta Kwu Ling station operated by Hong Kong Observatory was adopted. It is considered that the wind data obtained from Ta Kwu Ling station are representative of the Project area and could be used for the construction dust monitoring programme for the Project. The results for wind data monitoring are presented in Appendix H.
3.1.7 Recommended Mitigation Measures
3.1.7.1 The recommended dust mitigation measures from EIA report are listed as followed:
• The contractor shall follow the procedures and requirements given in the Air Pollution Control (Construction Dust) Regulation.
• Dust emission from construction vehicle movement is confined within the worksites area.
• Watering facilities will be provided at every designated vehicular exit point.
• Good site practice is recommended during construction phase.
3.1.8.1 Should non-compliance of the criteria occur, action in accordance with the action plan in Table 3-7 shall be carried out.
Table 3-7 Event and Action Plan for dust impact
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 |
4.1.1 In accordance with the EM&A manual, noise impact monitoring shall be carried out at 2 monitoring stations NM1 and NM2 once a week during normal construction working hour (0700-1900 Monday to Saturday). The minimum logging interval shall be 30 minutes with average of 6 consecutive Leq 5 mins. L10 and L90 shall also be measured at 5 mins intervals.
4.2 Monitoring Locations, Parameters and Frequency
4.2.1 According to the EM&A Manual, two monitoring stations namely NM1 and NM2 are selected for the impact monitoring.
4.2.2 A baseline monitoring plan has been submitted to IEC and EPD on 31 May 2022 including the proposal with justification of change of monitoring locations. Due to limited access to the original monitoring locations at NM1 and NM2, the adjusted stations at NM1a and NM2a were agreed with IEC prior to the baseline and impact monitoring. The noise monitoring locations are summarized in Table 4-1 and shown in Figure 2.
4.2.3 The detailed monitoring schedule is shown in Appendix C. The frequency and duration are shown in Table 4-2.
Monitoring Station |
Representative for |
Type of Measurement |
|
NM1a |
Wo Keng Shan Tsuen |
Free field |
|
NM2a |
Lin Ma Hang |
Free field |
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.
NM1 Wo Keng Shan Tsuen & NM2 Lin Ma Hang are the noise monitoring stations for the construction phase EM&A programme as identified in the approved EM&A Manual for the Project. The access to Tung Lo Hang, Heung Yuen Wai and Wo Keng Shan Tsuen were denied. A search for alternative noise monitoring locations (NM1a & NM2a) was carried out during the site visit.
The Baseline Monitoring Plan has been submitted to IEC 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 comments received from EPD. Noise measurement at NM1a & NM2a will be considered as free-field and a correction of +3dB(A) would be made to the noise monitoring results.
Due to the adjustment of the location of NM1 & NM2 to NM1a & NM2a, the measured noise levels at NM1 & NM2 would represent the noise levels at NM1 & NM2.
Monitoring Station |
Parameter |
Frequency and Duration |
NM1a and NM2a |
LAeq (30mins) average of 6 consecutive Leq (5min); L10 (5min) & L90 (5min) |
Once a week during normal construction working hour (0700-1900 Monday to Saturday) |
4.3.1 Integrating Sound Level Meters (SLMs) was used for noise impact monitoring. The SLM complied with International Electrotechnical Commission Publications 651:1979 (Type 1) and 804:1985 (Type 1) specifications shall be used for carrying out noise monitoring. The accuracy of the SLM was checked using an acoustic calibrator generating a known sound pressure level at a known frequency. Measurements shall be accepted as valid only if the calibration level from prior to and after the noise measurement agrees to within 1.0dB.
4.3.2 A portable wind speed meter was used for measuring wind speeds in m/s.
4.3.3 Table 4-3 summarises the equipment that have been used in the impact noise monitoring programme. The calibration certificates are shown in Appendix D.
Equipment |
Model |
Expiry Date |
Sound Level Meter |
NTi XL2 (S/N: A2A-13661-E0) |
21 Aug 2023 |
NTi XL2 (S/N: A2A-13548-E0) |
5 Feb 2024 (Using after 21 Aug 2023) |
|
Acoustic Calibrator |
Rion NC-75 (S/N: 35124527) |
1 Nov 2023 |
Anemometer |
RS PRO RS-90 (S/N: 210722208) |
12 Feb 2025 |
4.4.1 The details of noise measurement procedures are described as follows:
• Free-field measurements were made at the monitoring locations.
• For free field, the Sound Level Meter was set at a height of 1.2 m above the ground. The battery condition was checked to ensure the proper functioning of the meter.
• Parameters such as frequency weighting, the time weighting and the measurement time were set as follows:
• Frequency weighting: A
• Time weighting: Fast
• Measurement time: 5 minutes (Leq (30-min) would be determined for daytime noise by calculating the logarithmic average of six Leq (5min) data.)
• Prior to and after each noise measurement, the meter was calibrated using a Calibrator for 94.0 dB at 1000 Hz. If the difference in the calibration level before and after measurement was more than 1.0 dB, the measurement would be considered invalid and repeat of noise measurement would be required after recalibration or repair of the equipment.
• Noise measurement should be paused during periods of high intrusive noise if possible and observation shall be recorded when intrusive noise is not avoided.
• At the end of the monitoring period, the Leq, L10 and L90 shall be recorded. In addition, site conditions and noise sources should be recorded on a standard record sheet.
• All noise monitoring will be conducted with the wind speed not exceeding 5m/s and no gusts exceeding 10m/s.
Calibration & Maintenance
4.4.2 The sound level meter, sound calibrator, and anemometer should be properly maintained to ensure that the equipment and a continuous power supply were in good working condition. The sound level meter and sound calibrator will be calibrated annually. The anemometer will be calibrated two years interval in accordance with the HOKLAS Supplementary Criteria No.2. Calibration certificate will be provided after calibration.
4.4.3 The microphone head of the sound level meter and calibrator should be cleaned with a soft cloth at quarterly intervals.
4.5.1 The impact noise monitoring results are summarized in Table 4-4. The monitoring data together with graphical presentations are presented in Appendix E and Appendix F.
Noise Monitoring Station |
Average Leq, 30min, dB(A) (Range) |
Action Level |
Limit Level |
NM1a |
52.5 (51.3 – 53.1) |
When one documented complaint is received |
>75dB(A) |
NM2a |
51.1 (47.3 – 54.5) |
(1) * A correction of +3 dB(A) was made to the free field measurements
(2) If works are to be carried out during restricted hours, the conditions stipulated in the construction noise permit issued by the Noise Control Authority have to be followed.
4.5.2 No exceedance of Action and Limit Levels of construction noise was recorded during the reporting period. Therefore, there was no record of Notification of Environmental Quality Limits Exceedance in the Appendix G.
4.5.3 No particular observations are identified near the monitoring stations during the monitoring period.
4.6 Recommended Mitigation Measures
4.6.1 The recommended noise mitigation measures from EIA report are listed as followed:
1. Use of good site practices to limit noise emissions by considering the following:
• Only well-maintained plant should be operated on-site and plant should be serviced regularly during the construction programme;
• Machines and plant (such as trucks, cranes) that may be in intermittent use should be shut down between work periods or should be throttled down to a minimum;
• Plant known to emit noise strongly in one direction, where possible, be orientated so that the noise is directed away from nearby NSRs;
• Silencers or mufflers on construction equipment should be properly fitted and maintained during the construction works;
• Mobile plant should be sited as far away from NSRs as possible and practicable;
• Material stockpiles, mobile container site officer and other structures should be effectively utilised, where practicable, to screen noise from on-site construction activities.
2. Select “Quiet plants” which comply with the BS 5228 Part 1 or TM standards.
4.7.1 Should non-compliance of the criteria occurs, action in accordance with the action plan in Table 4-5 shall be carried out.
Table 4-5 Event and action plan for construction noise monitoring
Event |
ET |
IEC |
Contractor |
Exceedance of Action Level |
• Identify source, investigate the causes of exceedance • Prepare Notification of Exceedance • Inform IEC and Contractor • Report the results of investigation to IEC, and Contractor • Discuss with Contractor and IEC for formulate remedial measures • Ensure remedial measures are properly implemented • Have additional monitoring if exceedance is due to the Project. If exceedance stops, cease additional monitoring |
• Verify the Notification of Exceedance • Review the analysed results submitted by ET • Discuss with ET, and Contractor on the potential remedial actions • Review the proposed remedial measures • Supervise the implementation of remedial measures |
• Submit noise mitigation proposals to IEC • Implement the agreed noise mitigation proposals |
Exceedance of Limit Level |
• Identify source, investigate the causes of exceedance • Prepare Notification of Exceedance • Inform IEC and Contractor • Repeat measurements to confirm findings • Discuss with Contractor and IEC for remedial measures • Ensure remedial measures are properly implemented • Assess effectiveness of Contractor’s remedial actions and keep IEC and EPD informed of the results • Have additional monitoring if exceedance is due to the Project. If exceedance stops, cease additional monitoring |
• Verify the Notification of Exceedance • Review the analysed results submitted by ET • Discuss with ET, and Contractor on the potential remedial actions • Review the proposed remedial measures • 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 portion of works as determined by project proponent until the exceedance is abated. |
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.
5.2.1.1 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. 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. Detailed monitoring schedule is presented in Appendix C.
Table 5-1 Surface water quality monitoring locations
Monitoring Station |
Location |
Coordinates (HK Grid) |
|
Easting |
Northing |
||
WM1 |
Upstream of Lin Ma Hang River |
836665 |
845020 |
WM2 |
Ping Yuen River |
835592 |
844186 |
Table 5-2 Surface water quality monitoring Parameters, Frequency and Duration
Parameter |
Frequency |
pH, Electrical conductivity, DO, Turbidity, SS, Alkalinity, COD, BOD5, TOC, Ammonia-nitrogen, TKN, Nitrate, Sulphate, Sulphite, Phosphate, Chloride, Sodium, Mg, Ca, K, Fe, Ni, Zn, Mn, Cu, Pb, Cd, Coliform Count, Oil and Grease |
Once per month |
5.2.3.1 The measurements of pH, electrical conductivity (EC), DO, turbidity, water temperature and air temperature were undertaken in situ. In situ monitoring instruments in compliance with the specifications listed under Section 5.5 of the EM&A Manual were used to undertake the surface water quality monitoring for the Project. Table 5-3 summarises the equipment used in the impact surface water quality monitoring works. Copies of the calibration certificates are attached in Appendix D.
Table 5-3 Surface Water Quality Monitoring Equipment
Equipment |
Model |
Expiry Date |
Water Quality Meter |
YSI ProDSS (S/N: 22C106561) |
25 Oct 2023 (Using on 4 Aug 2023) |
HORIBA U-53 (S/N: PORBNFNT) |
16 Aug 2023 (Using on 5 Aug 2023) |
|
Water Flow Meter |
FP111 (S/N: 22K100859) |
6 Nov 2023 |
5.2.4 Summary of Surface Water Quality Monitoring Procedure
Operational/ Analytical Procedures
5.2.4.1 In general, water samples were collected from within 500 mm of the water surface. Water was collected by a small clean open-mouthed bucket with the lip pointing upstream. Usually, water was then transferred to the sample bottles until they were filled to the top with no remaining air space before the lid was securely screwed on. For samples that were preserved with acid or alkalis prior to transport to the laboratory, the samples bottles were filled to the level specified by the analytical laboratory.
5.2.4.2 Analyses shall be carried out in accordance with methods described in ASTM or APHA -AWWA-WEF Standard.
5.2.4.3 The testing of parameters presented in Table 5-4 for all stations was conducted by ALS Technichem (HK) Pty Ltd. (HOKLAS Registration No. 066). Comprehensive quality assurance and control procedures were in place in order to ensure quality and consistency in results. The detection limits are provided in Table 5-4.
Table 5-4 Surface Water Monitoring Detection Limits and Limit of Reporting
Parameters |
Detection
Limit |
Limit of Reporting |
Method Reference |
pH |
0.1 |
0.1 |
APHA 4500 H+ B |
Electrical conductivity |
1 mS/cm |
1 mS/cm |
APHA 2510 B |
Alkalinity |
1 mg/L |
1 mg/L |
APHA 2320 B |
COD |
10 mg/L |
5 mg/L |
APHA 5220 C |
BOD5 |
3 mg/L |
2 mg/L |
APHA 5210 B |
TOC |
1 mg/L |
1 mg/L |
APHA 5310 B |
SS |
0.1 mg/L |
0.1 mg/L |
APHA 2540 D |
Ammonia-nitrogen |
0.2 mg/L |
0.01 mg/L |
APHA 4500 NH3 G |
TKN |
0.4 mg/L |
0.1 mg/L |
APHA 4500Norg: D |
Nitrate |
0.5 mg/L |
0.01 mg/L |
APHA 4500 NO3 I |
Sulphate |
5 mg/L |
1 mg/L |
USEPA 375.4 |
Sulphite |
2 mg/L |
2 mg/L |
APHA 4500 SO3 B |
Phosphate |
0.01 mg/L |
0.01 mg/L |
APHA 4500-P B & F |
Chloride |
0.5 mg/L |
0.5 mg/L |
USEPA 325.1 |
Sodium |
50 mg/L |
50 mg/L |
USEPA 6010C |
Mg |
50 mg/L |
50 mg/L |
USEPA 6010C |
Ca |
50 mg/L |
50 mg/L |
USEPA 6010C |
K |
50 mg/L |
50 mg/L |
USEPA 6010C |
Fe |
50 mg/L |
10 mg/L |
USEPA 6010C |
Ni |
1 mg/L |
1 mg/L |
USEPA 6020A |
Zn |
10 mg/L |
10 mg/L |
USEPA 6020A |
Mn |
1 mg/L |
1 mg/L |
USEPA 6020A |
Cu |
1 mg/L |
1 mg/L |
USEPA 6020A |
Pb |
1 mg/L |
1 mg/L |
USEPA 6020A |
Cd |
0.2 mg/L |
0.2 mg/L |
USEPA 6020A |
Coliform Count |
1 cfu/ 100mL |
1 cfu/ 100mL |
DoE section 7.8, 7.9.4.1 & 3 |
Oil and Grease |
5 mg/L |
5 mg/L |
APHA 5520 B |
5.2.4.4 All in situ monitoring instruments were checked, calibrated and certified by a laboratory accredited under HOKLAS or other international accreditation scheme before use, and subsequently re-calibrated at the intervals according to manufacturer’s requirement throughout all stages of the surface water quality monitoring programme. Calibration of temperature, DO, salinity, pH and turbidity is conducted in three-month interval. Calibration of water flow is conducted annually. Responses of sensors and electrodes were checked with certified standard solutions before each use. Calibration for a DO meter was carried out before measurement according to the instruction manual of the equipment model. For the on-site calibration of field equipment, the requirements of the BS 1427:2018, "Guide to on-site test methods for the analysis of waters" was observed.
5.2.4.5 Water sampling equipment used during the course of the monitoring programme was decontaminated by manual washing and rinsed with clean distilled water after each sampling location.
Sampling Management and Supervision
5.2.4.6 All sampling bottles were labelled with the sample ID (including the indication of sampling station), laboratory number and sampling date. Water samples were dispatched to the testing laboratory for analysis as soon as possible after the sampling. All samples were stored in a cool box and kept at less than 4°C but without frozen. All water samples were handled under chain of custody protocols and relinquished to the laboratory representatives at locations specified by the laboratory. The laboratory determination works started within 24 hours after collection of water samples.
Quality Control Measures for Sample Testing
5.2.4.7 The samples testing was performed by ALS Technichem (HK) Pty Ltd. The following quality control programme was performed by the laboratory:
· One method blank; and
· One sample duplicate.
5.2.5.1 Impact surface water quality monitoring was conducted at WM1 and WM2 on 4 August 2023. No adverse weather was observed during reporting period. The detailed monitoring schedule is shown in Appendix C.
5.2.5.2 The summary of monitoring results is presented in Table 5-5. Detailed monitoring results at each monitoring station and graphical presentations of surface water quality (DO, SS and Turbidity) at the monitoring stations are given in Appendix E and Appendix F.
5.2.5.3 No particular observations are identified near the monitoring stations during the monitoring period.
Monitoring Parameter(s) |
Monitoring Station |
|||||
WM1 |
WM2 |
|||||
Monitoring Results |
Action Level |
Limit Level |
Monitoring Results |
Action Level |
Limit Level |
|
pH |
6.7 |
>7.7 |
>7.8 |
6.8 |
>7.6 |
>7.7 |
DO in mg/L |
6.5 |
<7.4 |
<4 |
7.0 |
<5 |
<4 |
Turbidity in NTU |
7.4 |
>9.2 |
>9.5 |
32.2 |
>108.3 |
>108.9 |
Electrical Conductivity in μS/cm |
68 |
--- |
--- |
133 |
--- |
--- |
SS in mg/L |
7.2 |
>9.7 |
>11.4 |
30.8 |
>94.5 |
>94.7 |
Alkalinity in mg/L |
19 |
--- |
35 |
--- |
||
COD in mg/L |
6 |
7 |
||||
BOD5 in mg/L |
<2 |
<2 |
||||
TOC in mg/L |
<1 |
<1 |
||||
Ammonia-nitrogen in mg/L |
0.02 |
0.08 |
||||
TKN in mg/L |
0.2 |
0.4 |
||||
Nitrate in mg/L |
0.05 |
0.24 |
||||
Sulphate in mg/L |
2 |
17 |
||||
Sulphite in mg/L |
<2 |
<2 |
||||
Phosphorus in mg/L |
<0.01 |
<0.01 |
||||
Chloride in mg/L |
5 |
6 |
||||
Sodium in µg/L |
7740 |
5840 |
||||
Magnesium in µg/L |
560 |
1480 |
||||
Calcium in µg/L |
3740 |
16100 |
||||
Potassium in µg/L |
460 |
2140 |
||||
Iron in µg/L |
780 |
2710 |
||||
Nickel in µg/L |
<1 |
4 |
||||
Zinc in µg/L |
15 |
68 |
||||
Manganese in µg/L |
46 |
1160 |
||||
Copper in µg/L |
<1 |
2 |
||||
Lead in µg/L |
<1 |
4 |
||||
Cadmium in µg/L |
<0.2 |
<0.2 |
||||
Coliform Count in cfu/100mL |
68 |
290 |
||||
Oil and Grease in mg/L |
<5 |
<5 |
5.2.5.4 One DO exceedance of Action Level of surface water quality at WM1 was recorded during the reporting period. 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 quality at WM1 were recorded during the reporting period. No exceedance of Action Levels and Limit Level of surface water monitoring at WM2 were recorded during the reporting period.
5.2.5.5 The investigation for turbidity exceedance of Limit Level of surface water quality at WM2 on 21 June 2023 had been completed by related parties. The Notification of Environmental Quality Limits Exceedance is presented in Appendix G.
5.2.5.6 The Summary of Impact Surface Water Quality Exceedance are shown in Table 5-6.
Water Quality Monitoring Station |
Parameter |
pH |
DO |
Turbidity |
SS |
Exceedance Count |
Level Exceedance |
||||||
WM1 |
Action |
0 |
1* |
0 |
0 |
1* |
Limit |
0 |
0 |
0 |
0 |
0 |
|
WM2 |
Action |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
Remarks:
(1) # The investigation results will be presented in the report after the investigation.
(2) * equal to non-project related
5.2.6 Recommended Mitigation Measure
5.2.6.1 The recommended surface water mitigation measures from EIA report are listed as followed:
• Channels (both temporary and permanent drainage pipes and culverts), earth bunds or sand bag barriers should be provided on site to direct stormwater to silt removal facilities.
• The overall slope of the site should be kept to a minimum to reduce the erosive potential of surface water flows.
• The design of efficient silt removal facilities should be based on the guidelines in Appendix A1 of ProPECC PN 1/94, which states that the retention time for silts and sediment traps should be 5 minutes under maximum flow conditions.
• All vehicles and plant should be cleaned before leaving a construction site to ensure no earth, mud, debris and the like is deposited by them on roads.
• Construction solid waste, debris and rubbish on site should be collected, handled and disposed of properly to avoid water quality impacts.
• Measures should be taken to prevent the washing away of construction materials, soil, silt or debris into any drainage system.
5.2.7 Implementation of the temporary surface water drainage system
5.2.7.1 The site inspection and audits were carried out by ER, IC, ET & Contractor on weekly basis (IEC on monthly basis) to monitor the construction progress, maintenance performance and effectiveness of temporary surface water drainage system in the Project Site to fulfil the FEP Condition 2.13, EP Condition 2.15 and the section 5.2.1.1 of the EM&A Manual. The layout of the temporary surface water drainage system is presented in Appendix Q. The joint environmental site inspection records are shown in Appendix J.
5.2.7.2 All construction site runoff would be treated by silt removal facilities to fulfil the requirement of WPCO licenses from the project. Construction site runoff from the project after treatment was discharged to Ping Yuen River. The surface water monitoring results at WM2 (after the discharge point of silt removal facilities) can reflect the water quality at Ping Yuen River during the reporting period.
5.2.8.1 Should non-compliance of the criteria occurs, action in accordance with the action plan in Table 5-6 shall be carried out.
Table 5-6 Event and Action Plan for Water Quality
Event |
ET |
IEC |
Contractor |
Action level being exceeded by one sampling day |
• Repeat in situ measurement to confirm findings • Identify source(s) of impact • Prepare Notification of Exceedance • Inform IEC and Contractor • Check monitoring data, all plant, equipment and Contractor’s working methods • Repeat measurement on next day of exceedance |
• Verify Notification of Exceedance • Check monitoring data and Contractor’s working methods |
• Rectify unacceptable practice • Amend working methods if appropriate |
Action level being exceeded by two or more consecutive sampling days |
• Repeat in situ measurement to confirm findings • Identify source(s) of impact • Prepare Notification of Exceedance • Inform IEC and Contractor • Check monitoring data, all plant, equipment and Contractor’s working methods • Discuss with Contractor and IEC for remedial measures • Ensure mitigation measures are implemented • Increase the monitoring frequency to daily until no exceedance of Action level • Repeat measurement on next day of exceedance |
• Verify Notification of Exceedance • Check monitoring data and Contractor's working method • Discuss with ET and Contractor on possible remedial actions • Review the proposed mitigation measures • Supervise the implementation of mitigation measures |
• Submit proposal of additional mitigation measures to IEC of notification • Implement the agreed mitigation measures • Amend proposal if appropriate |
Event |
ET |
IEC |
Contractor |
Limit Level being exceeded by one sampling day |
• Repeat in situ measurement to confirm findings • Identify source(s) of impact • Prepare Notification of Exceedance • Inform IEC and Contractor; • Check monitoring data, all plant, equipment and Contractor's working methods • Discuss mitigation measures with IEC and Contractor • Ensure mitigation measure are implemented |
• Verify Notification of Exceedance • Check monitoring data submitted By ET and Contractor’s working method • Discuss with ET and Contractor on possible remedial actions • Review the proposed mitigation measures • Supervise the implementation of mitigation measures |
• Critically review the working method • Rectify unacceptable practice • Take immediate corrective actions to avoid further exceedance • Submit proposal of mitigation measures to IEC • Implement the agreed mitigation measures • |
Limit level being exceeded by two or more consecutive sampling days |
• Repeat in situ measurement to confirm findings • Identify source(s) of impact • Prepare Notification of Exceedance • Inform IEC, contractor and EPD • Check monitoring data, all plant, equipment and Contractor's working methods • Discuss mitigation measures with IEC and Contractor • Ensure mitigation measure are implemented |
• Verify Notification of Exceedance • Check monitoring data submitted by ET and Contractor’s working method • Discuss with ET and Contractor on possible remedial actions • Review the proposed mitigation measures • Supervise the implementation of mitigation measures |
• Critically review the working method • Rectify unacceptable practice • Take immediate corrective actions to avoid further exceedance • Submit proposal of mitigation measures to IEC • Implement the agreed mitigation measures • Resubmit proposals if problem still not under control • Slow down or to stop relevant activity until exceedance is abated |
6.1.1 Wastes generated from this Project include inert construction and demolition (C&D) materials and non-inert C&D materials. Non-inert C&D materials were made up of general refuse, steels and paper/cardboard packaging materials. Steel materials generated from the Project were also grouped into non-inert C&D materials as the materials were not disposed of with other inert C&D materials. With reference to relevant handling records and trip tickets of this Project, the quantities of different types of waste generated in the reporting month are summarised in Appendix I.
6.1.2 A total of 63,076 tonnes of C&D materials was reused at alternative disposal ground (NENT Landfill) during the reporting period. No Yard waste (collected to Y-Park) was generated during the reporting period. A total of 30.77 tonnes of general refuse and A total of 71.75 tonnes of non-recyclable yard waste was generated during the reporting period. The general refuse generated from the Project were disposed of at the NENT Landfill.
6.1.3 The recommended waste management mitigation measures from EIA report are listed as followed:
• Implement a trip-ticket system to ensure that the movement of C&D materials are properly documented and verified in accordance with DEVB TC(W) No. 6/2010.
• Concrete and masonry should be used as general fill and steel reinforcement bars can be used by scrap steel mills.
• Proper areas should be designated for waste segregation and storage wherever site conditions permit.
• Maximise the use of reusable steel formwork to reduce the amount of C&D material.
• Maintain temporary stockpiles and reuse excavated fill material for backfilling and reinstatement.
• On-site sorting and segregation facility of all type of wastes is considered as one of the best practice in waste management and hence, should be implemented in all projects generating construction waste.
• The sorted public fill and C&D waste should be properly reused.
• Excavated slope, stockpiled material and bund walls should be covered by tarpaulin until used in order to prevent wind-blown dust during dry weather, and to reduce muddy runoff during wet weather.
7.1 Monitoring Requirement during Construction
Monitoring for Construction Works
7.1.1 Intrinsically safe portable gas detectors should be used during 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.
7.2.1 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 Location |
Type of works |
Portion A +50 mpD to 70 mpD Platform |
Excavation Works |
7.3.1.1 Gas Detector was used for carrying out LFG monitoring for Construction Works. Table 7-2 summarises the equipment that were used in the LFG monitoring programme. The calibration certificates are shown in Appendix D. The detection limits are provided in Table 7-3.
Table 7-2 LFG Monitoring Equipment
Monitoring Parameters |
Equipment |
Model |
Expiry Date |
CH4 & O2 |
Gas Detector |
PS200 (S/N: 373075) |
16 Nov 2023 |
CO2 |
Gas Analyser |
GEM5000 (S/N: G508566) |
- |
Table 7-3 Landfill Gas Monitoring Detection Limits
Parameters |
Detection Limit |
CH4 |
1% LEL |
O2 |
0.1% |
CO2 |
0.1% |
7.4 Event and Action Plan (EAP)
7.4.1 Should non-compliance of the criteria occur, action in accordance with the action plan in Table 7-4 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% |
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 |
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% |
Limit Level >1.5% CO2 |
Stop works Evacuate personnel / prohibit entry Increase ventilation to restore CO2 to <0.5% |
** This Action Level of CO2 at 0.5% is set for reference only, assuming no CO2 emission from a particular location.
Depending on the baseline CO2 levels, the Action Level at a particular location will be changed.
7.5.1 The LFG monitoring was carried out two rounds (at the beginning of works in the morning and after lunch) at the working days. The monitoring period of each round of LFG monitoring is around 5 minutes.
7.5.2 The LFG monitoring was conducted at Portion A +50 mpD to 70 mpD Platform in August 2023 (Conducted on working days). The LFG monitoring results are summarized in Table 7-5.
Table 7-5 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 |
|||||
Portion A +50 mpD to 70 mpD Platform |
1 Aug 2023 |
0 |
0 |
0 |
20.4 |
2 Aug 2023 |
0 |
0 |
0 |
20.1 |
|
3 Aug 2023 |
0 |
0 |
0 |
20.2 |
|
4 Aug 2023 |
0 |
0 |
0 |
20.2 |
|
5 Aug 2023 |
0 |
0 |
0 |
20.3 |
|
7 Aug 2023 |
0 |
0 |
0 |
20.2 |
|
8 Aug 2023 |
0 |
0 |
0 |
20.1 |
|
9 Aug 2023 |
0 |
0 |
0 |
20.2 |
|
10 Aug 2023 |
0 |
0 |
0 |
20.2 |
|
11 Aug 2023 |
0 |
0 |
0 |
20.1 |
|
12 Aug 2023 |
0 |
0 |
0 |
20.2 |
|
14 Aug 2023 |
0 |
0 |
0 |
20.2 |
|
15 Aug 2023 |
0 |
0 |
0 |
20.2 |
|
16 Aug 2023 |
0 |
0 |
0 |
20.2 |
|
17 Aug 2023 |
0 |
0 |
0 |
20.1 |
|
18 Aug 2023 |
0 |
0 |
0 |
20.1 |
|
19 Aug 2023 |
0 |
0 |
0 |
20.1 |
|
21 Aug 2023 |
0 |
0 |
0 |
20.2 |
|
22 Aug 2023 |
0 |
0 |
0 |
20.2 |
|
23 Aug 2023 |
0 |
0 |
0 |
20.1 |
|
24 Aug 2023 |
0 |
0 |
0 |
20.1 |
|
25 Aug 2023 |
0 |
0 |
0 |
20.2 |
|
26 Aug 2023 |
0 |
0 |
0 |
20.1 |
|
28 Aug 2023 |
0 |
0 |
0 |
20.2 |
|
29 Aug 2023 |
0 |
0 |
0 |
20.2 |
|
30 Aug 2023 |
0 |
0 |
0 |
20.2 |
|
31 Aug 2023 |
0 |
0 |
0 |
20.2 |
|
Action Level |
>10% LEL |
--- |
>0.5%** CO2 |
<19% |
* LEL: Lower Explosive Limit - concentrations in air below which there is not enough fuel to continue an explosion.
** This Limit Level of CO2 at 0.5% is set for reference only, assuming no CO2 emission from a particular location.
7.5.3 No exceedance of Limit Levels of LFG was recorded during the reporting period. Therefore, there was no record of Notification of Environmental Quality Limits Exceedance in the Appendix G.
7.5.4 No effect that arose from the other special phenomena and work progress of the concerned site was noted during the current monitoring month.
7.6 Recommended Mitigation Measures
7.6.1 The recommended landfill gas mitigation measures from EIA report are listed as followed:
• Special LFG precautions should be taken due to close proximity of NENT landfill extension site to existing landfill to avoid potential hazards of LFG exposure (ignition, explosion, asphyxiation, toxicity).
• Prominent safety warning signs should be erected on-site to alert all personnel and visitors of LFG hazards during excavation works.
• No smoking or burning should be permitted on-site.
• Prominent 'No smoking' and ‘No Naked Flames’ signs should be erected on-site.
• No worker should be allowed to work alone at any time in excavated trenches or confined areas on-site.
• Adequate fire fighting equipment should be provided on-site.
• Construction equipment should be equipped with vertical exhaust at least 0.6m above ground installed with spark arrestors.
• Electrical motors and extension cords should be explosion-proof and intrinsically safe for use on-site.
• ’Permit to Work' system should be implemented.
• Welding, flame-cutting or other hot works should be conducted only under ‘Permit to Work’ system following clear safety requirements, gas monitoring procedures and presence of qualified persons to supervise the works.
8.1.1 In order to monitor the landscape and visual impact after providing mitigation measures effectively, all the specified and affected LCAs, LRs and VSRs should be monitored. Implementation of the mitigation measures during construction phase of the Project has been monitored through the regular site inspection/audit.
8.1.2 All relevant environmental mitigation measures listed in the approved EIA Report and the EM&A Manual and their implementation status are summarised in Appendix K.
8.2.1 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.
9.1.1 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 23 August 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 8 July 2022. All the graves as shown on Figure 2 attached to the FEP were abandoned and removed and no mitigation or preservation measures is necessary.
9.1.4 The Survey Report and Mapping Records for Boulder Paths BP1 & 2 was certified by ET on 10 Oct 2022, was verified by IEC and submitted to EPD on 12 Oct 2022. The Conditions of G2, G4, G5 G6, G7, G8, G14, G15, G25, G26 and G27 within NENTX was certified by ET, was verified by IEC and submitted to EPD on 15 Oct 2022. No later than four weeks before commencement of construction of the project in accordance with Condition 2.4 of the FEP-01/292/2007.
9.1.5 Implementation of the mitigation measures such as 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 M. In case of any presence of undiscovered grave during construction phase, AMO will be informed as soon as possible.
10.1.1 The post-transplantation monitoring was conducted on 11 Aug 2023 based on the requirement of the approved Transplantation Proposal for Plant Species of Conservation Importance (Rev.1). The 13th Post-transplantation Monitoring and Audit Report (11th Aug 2023) presents the details of requirements, monitoring results and site inspection with photos. The site inspection photos are also summarized in Appendix N. During the reporting period, the numbers, measurements, and health conditions of the transplanted plant species are recorded.
10.1.2 The post-translocation monitoring has 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 |
1st |
24 Nov 2022 |
2nd |
9 Dec 2022 |
|
3rd |
21 Dec 2022 |
|
4th |
13 Jan 2023 |
|
5th |
26 Jan 2023 |
|
6th |
8 Feb 2023 |
|
7th |
24 Feb 2023 |
|
8th |
20 Mar 2023 |
|
9th |
21 Apr 2023 |
|
10th |
12 May 2023 |
|
11th |
16 Jun 2023 |
|
12th |
18 Jul 2023 |
|
13th |
11 Aug 2023 |
|
Post-translocation Monitoring |
1st (Aug 2022) |
29 Aug 2022 |
2nd (Sep 2022) |
28 Sep 2022 |
|
3rd (Oct 2022) |
28 Oct 2022 |
|
4th (Nov 2022) |
22 Nov 2022 |
|
5th (Dec 2022) |
29 Dec 2022 |
|
6th (Jan 2023) |
30 Jan 2023 |
|
7th (Feb 2023) |
24 Feb 2023 |
|
8th (Mar 2023) |
20 Mar 2023 |
|
9th (Apr 2023) |
19 Apr 2023 |
|
10th (May 2023) |
17 May 2023 |
|
11th (Jun 2023) |
7 Jun 2023 |
|
12th (Jul 2023) |
12 Jul 2023 |
11 Site Inspection and Audit
11.1.2 Weekly ET environmental site inspections were conducted in the reporting period on 07, 14, 21 & 28 August 2023. A joint environmental site inspection was carried out by the representatives of the ER, the Contractor, IEC and the ET on 21 August 2023. The joint environmental site inspection records are shown in Appendix J. There was no noncompliance recorded during the site inspections.
11.1.3 Major findings and recommendations are summarized as follows:
07 August 2023
Observation(s):
• Flocs and fine particles are floating on the water surface in sedimentation tank of the silt removal facility while sand and silt were accumulated in the outlet in Portion E3. The Contractor was advised to schedule cleaning works for the silt removal facility in Portion E3.
• The mixture of silt and stagnant water in the drip tray should be cleared off in Portion E3. The contractor was recommended to clear the drip tray.
Reminder(s):
• Earth bunds, sand barriers or alternative shall be provided to prevent sand or silt entering the existing channel through the gaps in Portion A. The contractor was advised to set up barriers or other measures to prevent sand and silt getting into the channel.
• The contractor was reminded to ensure the silt removal facility functioning properly in Portion A. The contractor was reminded that silt removal facility should be checked to ensure that they can function properly.
14 August 2023
Observation(s):
• The accumulated surface runoff at the lower elevation in Portion D should be diverted to the silt removal facility for wastewater treatment after the rainfall. The contractor was advised to pump out the accumulated surface runoff and divert to silt removal facility.
• Silt was observed in the existing channel at Portion A. The existing channel should be kept away from sand, silt and surface runoff. The contractor was recommended to construct earth bund with shotcrete along the existing channel in order to prevent surface runoff entering the channel in Portion A.
• The mixture of silt, sand, rotten leaves and stagnant water in the drip tray should be cleared off after the rainfall. The contractor was reminded to clear the drip trays after the rainfall.
• Oil drums in SBA are observed without drip tray. Drip tray should be provided to the oil drums and all chemical container in the site.
• The accumulated silt near the fencing in Portion A should be cleared off before and after rainstorm. The contractor was advised to clear the accumulated silt near the fencing in Portion A and sedimentation basin in Portion E3 before and after rainstorm.
• The accumulated silt in the sedimentation basin at Portion E3 should be regularly removed, especially before and after the rainstorm. The contractor was advised to clear the accumulated silt near the fencing in Portion A and sedimentation basin in Portion E3 before and after rainstorm.
• The silt removal facility was malfunctioned in Portion E3 and flocs are observed on the surface of silt removal facility in both Portion A and Portion E3. The collected wastewater should undergo sufficient mixing to ensure the discharged wastewater should comply with the requirement of WPCO license. The Contractor has been advised to stop the discharge of wastewater from the malfunctioned silt removal facility immediately. The wastewater should be stored or treated by another silt removal facility temporarily before the original silt removal facility is functioning properly. The Contractor should ensure the discharged wastewater to comply with the requirement of WPCO license.
• The untreated wastewater was leaked into the channel at Portion E3. The channel should be kept away from untreated wastewater and general waste. The contractor was also recommended to increase the number of silt removal facility so as to increase the capacity of wastewater treatment for long term.
Reminder(s):
• The Contractor was reminded to check silt removal facilities, channels and manholes to ensure that they can function properly for the upcoming rainfall in this week. The contractor was advised to seal the leakage point(s) and place sandbag barriers along the channel to stop the discharge of untreated wastewater in the channel immediately. The accumulated silt and general waste in the channel should be removed. The Contractor has been recommended to review the design of the sedimentation basin to prevent this situation from happening again in the future.
21 August 2023
Observation(s):
• The edge of site boundary should be properly sealed to prevent leakage of surface runoff flowing out of the site. The contractor was advised to construction earth bund or to provide sandbag barriers to seal at the site boundary.
• Enclosed bins or compaction units should be provided to separate general waste with chemical waste and construction waste in Portion A. The contractor was recommended to provide enclosed bins or compaction units in Portion A.
• NRMM label should be fixated on the generator in Portion A. The contractor was reminded to display NRMM label on the generator.
• Implementation of slope protection should be enhanced at Portion E4. The contractor was advised to implement slope protection measures on the exposed slope.
• Chemical containers should be placed within the drip trays in Portion E4. The contractor was reminded to provide drip tray for all chemical containers.
• The mixture of silt and stagnant water in the drip tray should be cleared off in Portion E3. The contractor was reminded to clear the drip tray.
28 August 2023
Observation(s):
• The slope protection measures should be enhanced in Portion A, B2 and E4 prior the rainfall and the tropical cyclone. The Contractor should cover the exposed slope with the impervious sheet as temporary measure or pave slope surface for long term. The Contractor was advised to implement slope protection measure on the bare slopes in Portion A, B2 and E4, especially before the arrival of the rainfall and tropical cyclone.
• Accumulated sand on the outlet tray of the silt removal facility in Portion A should be regularly cleared off. Dusts were observed at the surface of the wastewater. The Contractor was advised to clear the sand and silt on the outlet tray of the silt removal facility, especially before the arrival of the rainfall and tropical cyclone.
• NRMM label should be fixated on the generator in Portion A. The Contractor was reminded to display NRMM label on the generator.
• Drip tray should be provided for the air compressor in Portion A. The Contractor was reminded to provide drip tray for the air compressor in Portion A.
• Dusty stockpiles should be covered with impervious sheet prior rainfall and tropical cyclone. The Contractor was reminded to cover the dusty stockpile with impervious sheet prior the rainfall and tropical cyclone.
• Accumulated silt in the sedimentation basin should be cleared off regularly and prior rainfall and tropical cyclone. The Contractor was advised to regularly clear the sand and silt in the sedimentation basin, especially before the arrival of rainfall and tropical cyclone.
• The channel in Portion E4 should be properly paved to ensure accumulated sand or silt can be regularly removed. The Contractor was advised to pave the surface of the channel in Portion E4.
Reminder(s):
• The Contractor was reminded to check the condition of the silt removal facility, sedimentation basin and channel to ensure they functioning properly before the arrival of rainfall and tropical cyclone.
11.1.4 2 general site inspection on 4 & 21 August 2023 were conducted by Environmental Protection Department-Regional Office (North) (EPD-RNG).
12 Environmental Non-conformance
12.1 Summary of Monitoring Exceedance
Air Quality, Noise & Landfill Gas Monitoring
12.1.1 No exceedance of the Action Levels and Limit Level were recorded at designated monitoring stations during the reporting period. The Notification of Environmental Quality Limits Exceedance is presented in Appendix G.
Surface Water Quality Monitoring
12.1.2 One DO exceedance of the Action Level was recorded at Surface Water Quality Monitoring (WQM) Location WM1 during the reporting period. The exceedance is not project related after the investigation. No exceedance of Limit Level of surface water quality at WM1 were recorded during the reporting period. No exceedance of the Action and Limit Levels were recorded at Surface WQM Location WM2 during the reporting period. The Notification of Environmental Quality Limits Exceedance is presented in Appendix G.
The investigation for turbidity exceedance of Limit Level of surface water quality at WM2 on 21 June 2023 had been completed by related parties. In summary of the investigation, the muddy water caused from multi-potential sources while the runoff from the box culvert under the Wo Keng Shan Road is the major source including runoff from Existing channel near Portion E3-1, discharge water from the silt removal facilities at Portion E3-1 of the project, runoff from branch near the entrance of Portion E3-1, runoff from weighting plaza of NENT Landfill & natural stream near Wo Keng Shan & Shui Ngau Tso etc.. Hence, the project is a part of factor causing the high turbidity muddy water. To minimise the potential impact of construction runoff from the project, the further mitigation measures and enhancement of the temporary surface water drainage system were advised to implement by contractor. The Notification of Environmental Quality Limits Exceedance is presented in Appendix G.
12.2 Summary of Environmental Non-compliance
12.2.1 No non-compliance event was recorded during the reporting period.
12.3 Summary of Environmental Complaint
12.3.1 One Complaint received from EPD-RNG on 3 August 2023 was recorded during the reporting period. The complaint on 14 June 2023, enquiry on 15 June 2023 & complaint on 3 August 2023 were investigated by related parties.
Environmental Complaint on 3 August 2023
12.3.2 The complaint about the water aspect was received by ET on 3 August 2023 at 17:45 via EPD-RNG email. The main content of the complaint mentioned the muddy water was observed at River Ganges (GR3) (Water Quality Monitoring Point from EPD). In summary of the investigation, the muddy water caused from multi-potential sources while the runoff from the box culvert under the Wo Keng Shan Road is the major source including runoff from Existing channel near Portion E3-1, discharge water from the silt removal facilities at Portion E3-1 of the project, runoff from branch near the entrance of Portion E3-1, runoff from weighting plaza of NENT Landfill & natural stream near Wo Keng Shan & Shui Ngau Tso etc.. Hence, the project is a part of factor causing the high turbidity muddy water. To minimise the potential impact of construction runoff from the project, the further mitigation measures and enhancement of the temporary surface water drainage system were advised to implement by contractor.
Environmental Complaint on 14 June 2023
12.3.3 The complaint about the water aspect was received by ET on 14 June 2023 at 12:08 via EPD-RNG email. The main content of the complaint mentioned the muddy water was observed at Lin Ma Hang International Bridge on 30 May 2023. In summary of the investigation, the pollutant water appeared crimson colour with bubbles ay the LMH-OP01 (Monitoring Point from EPD). The colour and pattern of pollutant water is different from the runoff at surface WQM monitoring location WM1. Hence, the project is not the major source causing the pollutant water. To minimise the potential impact of the project, the enhancement of mitigation measures at north boundary were advised to implement by contractor.
Environmental Enquiry on 15 June 2023
12.3.4 The enquiry about the water aspect was received by ET on 15 June 2023 at 15:18 via EPD-RNG email. The main content of the enquiry mentioned the muddy water was observed at River Ganges (GR3) (Water Quality Monitoring Point from EPD). In summary of the investigation, the muddy water caused from multi-potential sources while the runoff from the box culvert under the Wo Keng Shan Road is the major source including runoff from Existing channel near Portion E3-1, discharge water from the silt removal facilities at Portion E3-1 of the project, runoff from branch near the entrance of Portion E3-1, runoff from weighting plaza of NENT Landfill & natural stream near Wo Keng Shan & Shui Ngau Tso etc.. Hence, the project is a part of factor causing the high turbidity muddy water. To minimise the potential impact of construction runoff from the project, the further mitigation measures and enhancement of the temporary surface water drainage system were advised to implement by contractor.
12.3.5 The cumulative statistics on environmental complaints are presented in Table 12-1.
Table 12-1 Cumulative Statistics on Environmental Complaints
Reporting Period |
Environmental Aspects |
No. of Environmental Complaints |
||||
Air Quality |
Noise |
Water Quality |
Waste |
Ecology |
||
Aug 2023 |
0 |
0 |
1 |
0 |
0 |
0 |
Accumulate of project |
1* |
0 |
2(1*) |
0 |
0 |
3(2*) |
Remarks:
(1) * equal to non-project related after the investigation
(2) # equal to the investigation results will be presented in the report after the investigation.
12.3.6 Cumulative complaint / enquiry log, Summaries of complaints and enquiries & Environmental complaint reports are presented in Appendix P.
12.4 Summary of Environmental Summons and Successful Prosecution
12.4.1 No summons and successful prosecution were received during the reporting period.
13 Implementation Status on Environmental Mitigation Measures
13.1 General
13.1.1 The Contractor has generally implemented part of environmental mitigation measures and requirements as stated in the EIA Report, the EP and EM&A Manual and the contract documents. The implementation status during the reporting period is summarized in Appendix K.
13.2 Temporary Surface Water Drainage System (TSWDS)
13.2.1 The effectiveness of the TSWDS is keeping reviewing and improve by the contractor. The layout of the TSWDS is presented in Appendix Q.
13.3 Hydroseeding
13.3.1 The implementation of hydroseeding at the site boundary is keeping conducting by the contractor. The layout of implementation of hydroseeding is presented in Appendix Q.
15.2 Key Issues for the Coming Month
- Material loading and unloading, site traffic at Portion A, SBA to alternative disposal ground |
- Permanent site office foundation works with pouring of concrete at Portion D |
- Site clearance at Portion A & E3-1 |
- Installation of permanent fencing at Portion A, B1 & E4 |
- Site formation at Portion A & E3-1 |
- Tree felling at Portion E3-1 & E4 |
15.3 Monitoring Schedule for the Next Month
15.4 Construction Programme for the Next Month
16.1.1 1-hr & 24-hr TSP impact monitoring was carried out in the reporting month. No Action / Limit Level exceedance for 1-hr & 24-hr TSP impact monitoring was recorded during the period.
16.1.2 Construction noise monitoring was carried out in the reporting month. No Action / Limit Level exceedance at NM1a & NM2a was recorded during the period.
16.1.4 One DO exceedance of the Action Level was recorded at Surface Water Quality Monitoring (WQM) Location WM1 during the reporting period. 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 quality at WM1 were recorded during the reporting period. No exceedance of the Action and Limit Levels were recorded at Surface WQM Location WM2 during the reporting period.
16.1.5 The investigation for turbidity exceedance of Limit Level of surface water quality at WM2 on 21 June 2023 had been completed by related parties. In summary of the investigation, the muddy water caused from multi-potential sources while the runoff from the box culvert under the Wo Keng Shan Road is the major source including runoff from Existing channel near Portion E3-1, discharge water from the silt removal facilities at Portion E3-1 of the project, runoff from branch near the entrance of Portion E3-1, runoff from weighting plaza of NENT Landfill & natural stream near Wo Keng Shan & Shui Ngau Tso etc.. Hence, the project is a part of factor causing the high turbidity muddy water. To minimise the potential impact of construction runoff from the project, the further mitigation measures and enhancement of the temporary surface water drainage system were advised to implement by contractor.
16.1.6 Landfill Gas Monitoring was carried out in the reporting month. No exceedance of Limit Levels of LFG was recorded during the reporting period.
16.1.7 In terms of cultural heritage, implementation of the mitigation measures such as permanent fencing to protect the boulder path and setting up warning notices during construction phase of the Project has been monitored through the regular site inspection/audit in the reporting period. All the mitigation measures are in order.
16.1.8 Post-transplantation monitoring was carried out in the reporting month. The numbers, measurements and health conditions of the transplanted species are recorded.
16.1.9 Four environmental site inspections were carried out in the reporting month. Recommendations on mitigation measures for Permit/ Licenses were given to the Contractor for remediating the deficiencies identified during the site inspections.
16.1.10 One Complaint received on 3 August 2023 was recorded during the reporting period. The complaint on 14 June 2023, enquiry on 15 June 2023 & complaint on 3 August 2023 were investigated by related parties.
Environmental Complaint on 3 August 2023
16.1.11 The complaint about the water aspect was received by ET on 3 August 2023 at 17:45 via EPD-RNG email. The main content of the complaint mentioned the muddy water was observed at River Ganges (GR3) (Water Quality Monitoring Point from EPD). In summary of the investigation, the muddy water caused from multi-potential sources while the runoff from the box culvert under the Wo Keng Shan Road is the major source including runoff from Existing channel near Portion E3-1, discharge water from the silt removal facilities at Portion E3-1 of the project, runoff from branch near the entrance of Portion E3-1, runoff from weighting plaza of NENT Landfill & natural stream near Wo Keng Shan & Shui Ngau Tso etc.. Hence, the project is a part of factor causing the high turbidity muddy water. To minimise the potential impact of construction runoff from the project, the further mitigation measures and enhancement of the temporary surface water drainage system were advised to implement by contractor.
Environmental Complaint on 14 June 2023
16.1.12 The complaint about the water aspect was received by ET on 14 June 2023 at 12:08 via EPD-RNG email. The main content of the complaint mentioned the muddy water was observed at Lin Ma Hang International Bridge on 30 May 2023. In summary of the investigation, the pollutant water appeared crimson colour with bubbles ay the LMH-OP01 (Monitoring Point from EPD). The colour and pattern of pollutant water is different from the runoff at surface WQM monitoring location WM1. Hence, the project is not the major source causing the pollutant water. To minimise the potential impact of the project, the enhancement of mitigation measures at north boundary were advised to implement by contractor.
Environmental Enquiry on 15 June 2023
16.1.13 The enquiry about the water aspect was received by ET on 15 June 2023 at 15:18 via EPD-RNG email. The main content of the enquiry mentioned the muddy water was observed at River Ganges (GR3) (Water Quality Monitoring Point from EPD). In summary of the investigation, the muddy water caused from multi-potential sources while the runoff from the box culvert under the Wo Keng Shan Road is the major source including runoff from Existing channel near Portion E3-1, discharge water from the silt removal facilities at Portion E3-1 of the project, runoff from branch near the entrance of Portion E3-1, runoff from weighting plaza of NENT Landfill & natural stream near Wo Keng Shan & Shui Ngau Tso etc.. Hence, the project is a part of factor causing the high turbidity muddy water. To minimise the potential impact of construction runoff from the project, the further mitigation measures and enhancement of the temporary surface water drainage system were advised to implement by contractor.
16.1.14 No non-compliance event was recorded during the reporting period.
16.1.15 No notification of summons and prosecution was received during the reporting period.
16.1.16 The ET will keep track on the EM&A programme to ensure compliance of environmental requirements and the proper implementation of all necessary mitigation measures