Contents
Executive Summary
1.1 Background
1.2 Project Description
1.3 Scope of the EM&A Report
1.4 Project Organisation
1.5 Summary of Construction Works
1.6 Summary of EM&A Programme Requirements
1.7 Status of Statutory Environmental Compliance with the Environmental Permit
1.8 Status of Other Statutory Environmental Requirements
2.1 Air Quality Monitoring
2.2 Noise Monitoring
2.3 Surface Water Quality Monitoring
2.4 Landscape and Visual Monitoring
2.5 EM&A Site Inspection
2.6 Waste Management Status
2.7 Implementation Status of Environmental Mitigation Measures
2.8 Summary of Exceedances of the Environmental Quality Performance Limit
2.9 Summary of Complaints, Notification of Summons and Successful Prosecutions
3.1 Construction Programme for the Coming Month
3.2 Key Issues for the Coming Month
3.3 Monitoring Schedule for the Coming Month
4 Conclusion and Recommendation
Annexes
Annex A Work Programme
Annex B Environmental Mitigation Implementation Schedule
Annex C Monitoring Schedule for This Reporting Period
Annex
D Air Quality
Annex D1 Calibration Certificates for Dust Monitoring Equipment
Annex D2 24-hour TSP Monitoring Results
Annex D3 Event and Action Plan for Dust Monitoring
Annex D4 Meteorological Data
Annex
E Noise
Annex E1 Calibration Certificates for Noise Monitoring Equipment
Annex E2 Noise Monitoring Results
Annex E3 Event and Action Plan for Noise Monitoring
Annex
F Surface Water Quality
Annex F1 Calibration Certificates for Surface Water Quality Monitoring
Equipment
Annex F2 Surface Water Quality Monitoring Results
Annex F3 Event and Action Plan
for Surface Water Quality
Monitoring
Annex F4 Investigation Reports of Environmental Quality Limit Exceedance
Annex H Monitoring Schedule for the Next Reporting Period
Executive Summary
The SENT Landfill Extension (SENTX) forms an integral part in the Strategic Plan in maintaining the continuity of landfill capacity in the Hong Kong for the cost-effective and environmentally satisfactory disposal of waste. ERM-Hong Kong, Limited (ERM) is commissioned to undertake the role of Environmental Team (ET) for the construction, operation/restoration and aftercare of SENTX Project (“the Project”) in accordance with the requirements specified in the Environmental Permit (EP), updated Environmental Monitoring and Audit (EM&A) Manual, the approved Environmental Impact Assessment (EIA) Report of the Project taking account of the latest design and other relevant statutory requirements. The construction (not including works related to site clearance and preparation) of the Project commenced on 2 January 2019.
This Monthly EM&A report presents the EM&A works carried out during the period from 1 to 31 May 2019 for the Project in accordance with the updated EM&A Manual.
Exceedance of Action and Limit Levels for Air Quality
No exceedance of Action and Limit Levels was recorded for construction air quality monitoring in the reporting period.
Exceedance of Action and Limit Levels for Noise
No exceedance of Action and Limit Levels was recorded for construction noise monitoring in the reporting period.
Exceedance of Action and Limit Levels for Surface Water Quality
6 Limit Level of pH exceedances and 6 Limit Level of Suspended Solids (SS) exceedances were recorded for surface water quality impact monitoring in the reporting period. The pH and SS exceedances at DP6 on 8 May 2019, pH and SS exceedances at DP3, pH exceedance at DP6 on 23 May 2019 and pH and SS exceedances at DP4 (Future, temporary) and DP6 on 30 May 2019 were considered not Project-related upon further investigation. The pH and SS exceedances at DP4 (Future, temporary) and SS exceedance at DP6 on 23 May 2019 were found deemed to Project-related activities.
Environmental Complaints, Summons and Prosecutions
There were no complaints, notification of summons or prosecution recorded in the reporting period.
Reporting Change
There was no reporting change in the reporting period.
Future Key Issues
Potential environmental impacts arising from the upcoming construction activities in the next reporting period of June 2019 are mainly associated with the potential surface water impact in the coming rainy season.
1
Introduction
1.1
Background
The SENT Landfill Extension (SENTX) forms an integral part in the Strategic Plan in maintaining the continuity of landfill capacity in the Hong Kong for the cost-effective and environmentally satisfactory disposal of waste. The Environmental Impact Assessment (EIA) Report and the associated Environmental Monitoring and Audit (EM&A) Manual for the construction, operation, restoration and aftercare of the SENTX (hereafter referred to as “the Project”) have been approved under the Environmental Impact Assessment Ordinance (EIAO) in May 2008 (Register No.: AEIAR-117/2008) (hereafter referred to as the approved EIA Report) and an Environmental Permit (EP-308/2008) (EP) was granted by the Director of Environmental Protection (DEP) on 5 August 2008.
Since then, applications for Variation of an Environmental Permit (No. VEP-531/2017) were submitted to EPD and the Variation of Environmental Permits (EP-308/2008/A and EP-308/2008/B) were granted on 6 January 2012 and 20 January 2017, respectively, as the Hong Kong SAR Government has decided to reduce the scale of the design scheme of SENTX assessed in the approved EIA Report and SENTX will only receive construction waste. In May 2018, a Further Environmental Permit (FEP) (FEP-01/308/2008/B) was granted to the SENTX’s contractor, Green Valley Landfill, Limited (GVL).
ERM-Hong Kong, Limited (ERM) and Meinhardt Infrastructure and Environment Limited (Meinhardt) are commissioned to undertake the roles of Environmental Team (ET) and the Independent Environmental Checker (IEC), respectively, to undertake the EM&A activities for the Project in accordance with the requirements specified in the EP, updated EM&A Manual ([1]), approved EIA Report ([2]) taking account of the latest design and other relevant statutory requirements.
1.2
Project Description
The SENTX is a piggyback landfill, occupying the southern part of the existing SENT Landfill (including its infrastructure area) and 13 ha of Tseung Kwan O (TKO) Area 137. A layout plan of the SENTX is shown in Figure 1.1. Under the latest design, the SENTX has a net void capacity of about 6.5 Mm3 and provides an additional lifespan of about 6 years, commencing operation upon exhaustion of the SENT Landfill. The SENTX will receive construction waste only.
The key implementation milestones of the Project are indicatively summarised in Table 1.1. The construction works of the Project commenced on 2 January 2019.
Table 1.1 Estimated Key Dates of Implementation Programme
|
Key Stage of the Project |
Indicative Date |
|
Start construction |
2 January 2019 |
|
Commissioning of new infrastructure facilities |
2020 |
|
Demolition of existing infrastructure facilities |
2021 |
|
Start waste intake at SENTX |
2021 or upon exhaustion of SENT Landfill |
|
Estimated exhaustion date of SENTX |
2027 |
|
End of aftercare for SENTX |
2057 |
The major construction works of the SENTX includes:
· Site formation at the TKO Area 137 and the existing infrastructure area at SENT Landfill;
· Construction of surface and groundwater drainage systems;
· Construction of the leachate containment and collection systems;
· Construction of new leachate and landfill gas treatment facilities, site offices, maintenance yards at the new infrastructure area;
· Construction of new pipelines to transfer the leachate and landfill gas collected from the existing SENT Landfill to the treatment facilities at the new infrastructure area;
· Construction of the site access and new waste reception facilities; and
· Demolition of the facilities at the existing SENT Landfill infrastructure area.
1.3
Scope of the EM&A Report
This is the Monthly EM&A Report for the Project which summarises the key findings of the EM&A programme during the reporting period from 1 to 31 May 2019 for the construction works.
1.4
Project Organisation
The organization structure of the Project is presented in Figure 1.2.
Figure 1.2 Organisation Chart
Contact details of the key personnel are summarized in Table 1.2 below.
Table 1.2 Contact Information of Key Personnel
|
Party |
Position |
Name |
Telephone |
|
Contractor (Green Valley Landfill Limited) |
Project Manager |
Gary Barnicott |
2706 8827 |
|
Environmental Team (ET) (ERM-Hong Kong, Limited)
|
ET Leader |
Frank Wan |
2271 3152 |
|
Independent Environmental Checker (IEC) (Meinhardt Infrastructure and Environment Limited)
|
IEC |
Fredrick Leong |
2859 1739 |
1.5
Summary of Construction Works
The programme of the construction is shown in Annex A. As informed by the Contractor, details of the major works carried out in this reporting period are listed below:
· Construction of perimeter bund - Cell X1;
· Construction of perimeter bund - Cell X2;
· Construction of sediment trap; and
· Construction of outlet box culvert.
The environmental mitigation implementation schedule is presented in Annex B.
1.6
Summary of EM&A Programme Requirements
The status for all environmental aspects are presented in Table 1.3. The EM&A requirements remained unchanged during the reporting period.
Table 1.3 Summary of Status for the Environmental Aspects under the Updated EM&A Manual
|
Parameters |
Status |
|
Air Quality |
|
|
Baseline Monitoring |
The results of baseline air quality monitoring were reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.3 |
|
Impact Monitoring |
On-going |
|
Noise |
|
|
Baseline Monitoring |
The results of baseline noise monitoring were reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.3 |
|
Impact Monitoring |
On-going |
|
Surface Water Quality |
|
|
Baseline Monitoring |
The results of baseline surface water quality monitoring were reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.3 |
|
Impact Monitoring |
On-going |
|
Waste Management |
|
|
Waste Monitoring |
On-going |
|
Landscape and Visual |
|
|
Baseline Monitoring |
The results of baseline landscape and visual monitoring were reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.3 |
|
Construction Phase Audit |
On-going |
|
Site Environmental Audit |
|
|
Regular Site Inspection |
On-going |
|
Complaint Hotline and Email Channel |
On-going |
|
Environmental Log Book |
On-going |
Taking into account the construction works, impact monitoring of air quality, noise, surface water quality and waste management were carried out in the reporting period. The monitoring schedule of air quality, noise and surface water quality monitoring are provided in Annex C.
The EM&A programme also involved environmental site inspections and related auditing conducted by the ET for checking the implementation of the required environmental mitigation measures recommended in the approved EIA Report and relevant EP submissions. To promote the environmental awareness and enhance the environmental performance of the contractors, environmental trainings and regular environmental management meetings were conducted during the reporting period, which are summarized as below:
Ÿ One environmental management meeting was held with the Contractor, ER, ET, IEC and EPD on 9 May 2019; and
Ÿ Environmental toolbox trainings on Chemical Waste Handling and Quality Powered Mechanical Equipment were provided on 15 May and 28 May 2019 respectively by the Contractor to the workers.
1.7
Status of Statutory Environmental Compliance with the
Environmental Permit
The status of statutory environmental compliance with the EP conditions under the EIAO, submission status under the EP and implementation status of mitigation measures are presented in Table 1.4.
Table 1.4 Status of Submissions and Implementation Status of Mitigation Measures under EP
|
EP Condition |
Submission / Implementation Status |
Status |
|
2.3 |
Management Organisation of Main Construction Companies |
Accepted by EPD. |
|
2.4 |
Setting up of Community Liaison Group |
Community Liaison Group was set up. |
|
2.5 |
Submission of Detailed Landfill Gas Hazard Assessment Report |
Accepted by EPD on 10 January 2019. |
|
2.6 |
Submission of Restoration and Ecological Enhancement Plan |
To be prepared within 6 months after the commencement of construction of the Project. |
|
2.7 |
Setting up of Trial Nursery |
To be set up during construction phase. |
|
2.8 |
Advance Screen Planting |
To be completed within 9 months of taking procession of the Project Site. |
|
2.9 |
Provision of Multi-layer Composite Liner System |
Under implementation. |
1.8
Status of Other Statutory Environmental Requirements
The environmental licenses and permits, including environmental permit, water discharge license, registration as chemical waste producer and construction noise permit, which are valid in the reporting period are presented in Table 1.5. No non-compliance with environmental statutory requirements was recorded.
Table 1.5 Status of Statutory Environmental Requirements
|
Description |
Ref No. |
Status |
|
Environmental Permit |
EP-308/2008 |
Granted on 5 August 2008 |
|
Variation of Environmental Permit |
EP-308/2008/A |
Granted on 6 January 2012 |
|
EP-308/2008/B |
Granted on 20 January 2017 |
|
|
Further Environmental Permit |
FEP-01/308/2008/B |
Granted on 16 May 2018 |
|
Water Discharge License under Water Pollution Control Ordinance (Permit Holder: Chun Wo) |
Licence No.: WT00033525-2019 |
Validity from 27 March 2019 to 31 March 2024 |
|
Billing Account for Disposal of Construction Waste
|
Chit Account Number: 5001692 |
Approved on 28 December 2005 |
|
Registration as Chemical Waste Producer (Permit Holder: Chun Wo) |
5213-839-C3507-10 |
Issued on 23 August 2018 |
|
Construction Noise Permit (Permit Holder: Chun Wo) |
GW-RE0259-19 |
Validity from 15 April 2019 to 8 October 2019 |
|
GW-RE0002-19 |
Validity from 8 January 2019 to 1 July 2019 |
2
EM&A Results
The EM&A programme for the Project required environmental monitoring for air quality, noise and surface water quality as well as environmental site inspections for air quality, noise, surface water quality, waste management, and landscape and visual impacts. The EM&A requirements and related findings for each component are summarized in the following sections.
2.1
Air Quality Monitoring
2.1.1
Monitoring Requirements and Equipment
According to the updated EM&A Manual of the Project, impact air quality monitoring (dust, in term of Total Suspended Particulates (TSP)) was carried out at the two designated monitoring locations (i.e. DM1 and DM2) at a 6-day interval. As there are two existing TSP monitoring stations (i.e. TKO-A1 and TKO-A2a) currently operating by the Civil Engineering and Development Department (CEDD) to monitor the 24-hour TSP levels at the proposed dust monitoring stations for the SENTX, it is considered that the CEDD monitoring data can represent the dust condition of the SENTX during the construction phase.
The Action and Limit Levels of the air quality monitoring is provided in Table 2.1 below.
Table 2.1 Action and Limit Levels for 24-hour TSP
|
Monitoring Station |
Action Level |
Limit Level |
|
DM-1 – Site Egress of TKO Area 137 Fill Bank
|
204 µg m-³ |
260 µg m-³ |
|
DM-2A –Combined Reception and Exit Office (CREO) of TKO Area 137 Fill Bank |
193 µg m-³ |
260 µg m-³ |
High volume air samplers (HVSs) in compliance with the specifications listed under Section 3.2.2 of the updated EM&A Manual were used to measure 24-hour TSP levels at the CEDD dust monitoring stations. The HVSs were calibrated upon installation and thereafter at bi-monthly intervals to check the validity and accuracy of the results.
The equipment used in the impact air quality monitoring programme and monitoring locations are summarized in Table 2.2 and illustrated in Figure 2.1 respectively. Copies of the calibration certificates for the equipment are presented in Annex D1.
Table 2.2 Dust Monitoring Details
|
Monitoring Station |
Location |
Parameter |
Frequency and Duration |
Monitoring Dates |
Equipment |
|
DM1 |
Site Egress of TKO Area 137 Fill Bank |
24-hour TSP |
Once every 6 days during the construction phase of the Project |
4, 10, 16, 22, 28 May 2019 |
HVS Greasby 105 (S/N: 9795 (ET/EA/003/18)) |
|
DM2 |
Combined Reception and Exit Office (CREO) of TKO Area 137 Fill Bank |
|
HVS Andersen G1051 (S/N: 1176 (ET/EA/003/05)) |
2.1.2
Monitoring Schedule for the Reporting Month
The schedule for air quality monitoring during the reporting period is provided in Annex C.
2.1.3
Results and Observations
The monitoring results for 24-hour TSP are summarized in Table 2.3. The detailed monitoring results and the graphical presentation of the 24-hour TSP results at each monitoring location are provided in Annex D2.
Table 2.3 Summary of 24-hour TSP Monitoring Results in the Reporting Period
|
Monitoring Station |
Average 24-hr TSP Concentration (µg m-3) (Range in bracket) |
Action Level (µg/m3) |
Limit Level (µg/m3) |
|
DM-1 – Site Egress of TKO Area 137 Fill Bank |
92 (73 - 105)
|
204 |
260 |
|
DM-2A –Combined Reception and Exit Office (CREO) of TKO Area 137 Fill Bank |
84 (68 - 103) |
193 |
260 |
The major dust sources in the reporting period included fugitive dust emission from exposed area in SENTX, as well as nearby operations of the existing SENT landfill and the TKO Area 137 Fill Bank.
All the 24-hour TSP results were below the Action and Limit Levels at the monitoring locations in the reporting period. No action is thus required to be undertaken in accordance with the Event and Action Plan presented in Annex D3.
2.1.4
Meteorological Data
Meteorological data obtained from the on-site meteorological monitoring station at the existing SENT landfill (see Figure 2.1) were used for the dust monitoring and are shown in Annex D4. The meteorological station will be relocated to a new position for SENTX as per the updated EM&A Manual after the new infrastructure area at the SENTX is constructed. It is considered that meteorological data obtained at the existing the on-site meteorological monitoring station are representative of the Project area and could be used for the construction phase dust monitoring programme for the Project.
2.2
Noise Monitoring
2.2.1
Monitoring Requirements and Equipment
According to the updated EM&A Manual of the Project, impact noise monitoring was conducted weekly at the monitoring location (i.e. NM1) to obtain one set of 30 minutes measurement between 07:00 and 19:00 hours on normal weekdays.
The Action and Limit Level for construction noise of the Project is provided in Table 2.4 below.
Table 2.4 Action and Limit Levels for Construction Noise
|
Time Period |
Action Level (a) |
Limit Level (b) |
|
07:00 – 19:00 hrs on normal weekdays |
When one documented complaint is received from any one of the noise sensitive receivers (NSRs) or 75 dB(A) recorded at the monitoring station |
75 dB(A) at NSRs |
|
Notes: (a) 75dB(A) along and at about 100m from the SENTX site boundary was set as the Action Level. (b) Limits specified in the GW-TM and IND-TM for construction and operational noise, respectively. |
||
Noise monitoring was performed by ALS Technichem (HK) Pty Ltd. (HOKLAS Registration No. 066) using sound level meter at the designated monitoring station NM1 (see Figure 2.1) in accordance with the requirements stipulated in the updated EM&A Manual. Acoustic calibrator was deployed to check the sound level meter at a known sound pressure level. Details of the deployed equipment are provided in Table 2.5. Copies of the calibration certificates for the equipment are presented in Annex E1.
Table 2.5 Noise Monitoring Details
|
Monitoring Station (1) |
Location |
Parameter |
Frequency and Duration |
Monitoring Dates |
Equipment |
|
NM1 |
SENTX Site Boundary (North) |
Leq (30 min) measurement between 07:00 and 19:00 hours on normal weekdays (Monday to Saturday) |
Once per week for 30 mins during the construction period of the Project |
2, 8, 16, 23, 30 May 2019 |
Sound Level Meter: B&K 2238 (S/N: 2285722)
Acoustic Calibrator: Rion NC-74 (S/N: 34246492) |
2.2.2
Monitoring Schedule for the Reporting Month
The schedule for noise monitoring during the reporting period is provided in Annex C.
2.2.3
Results and Observations
Results for noise monitoring are summarized in Table 2.6. The monitoring results and the graphical presentation of the data are provided in Annex E2.
Table 2.6 Summary of Construction Noise Monitoring Results in the Reporting Period
|
Monitoring Station |
Measured Noise Level Leq (30 min), dB(A) |
||
|
Average |
Range |
Action and Limit Level |
|
|
NM1 |
52.8 |
51.6 – 54.6 |
75 |
Major noise sources during the noise monitoring included noise from operations of the existing SENT landfill and the TKO Area 137 Fill Bank, aircrafts and insects.
No Action and Limit Levels exceedance was recorded for construction noise monitoring in the reporting period. No action is thus required to be undertaken in accordance with the Event and Action Plan presented in Annex E3.
2.3
Surface Water Quality Monitoring
2.3.1
Monitoring Requirements and Equipment
According to the updated EM&A Manual of the Project, impact surface water quality monitoring were carried out at the three designated surface water discharge points (i.e. DP3, DP4 and DP6) weekly to ensure that the SENTX will not cause adverse water quality impact. Temporary relocation of surface water discharge point DP4 to DP4 (Future, temporary) as an interim arrangement due to site constraints and construction sequence was approved by EPD on 14 May 2019. Surface water quality monitoring was carried out at DP4 (Future, temporary) (i.e. DP4T) from the monitoring event on 16 May 2019.
Dissolved Oxygen (DO) and pH value were measured in-situ whereas the level of suspended solids (SS) were determined by ALS Technichem (HK) Pty Ltd. (HOKLAS Registration No. 066).
The Action and Limit Levels of the surface water quality impact monitoring are provided in Table 2.7.
Table 2.7 Action and Limit Levels for Surface Water Quality
|
Parameters |
Action Level |
Limit Level |
||
|
|
DP3 |
DP4 & DP6 |
DP3 |
DP4 & DP6 |
|
DO |
< 5.13 mg/L |
< 5.80 mg/L |
< 4.35 mg/L |
< 5.42 mg/L |
|
SS |
> 209.3 mg/L |
> 11.7 mg/L |
> 217.0 mg/L |
> 12.7 mg/L |
|
pH |
> 8.88 |
> 8.39 |
> 9.28 |
> 8.40 |
The locations of the monitoring stations under the Project are shown in Figure 2.1. All in situ monitoring instruments were checked, calibrated and certified by a laboratory accredited under HOKLAS or other international accreditation scheme before use, and subsequently re-calibrated at 3 monthly intervals throughout all stages of the surface water quality monitoring programme. Calibration for a DO meter was carried out before measurement according to the instruction manual of the equipment model. Details of the equipment used in the impact surface water quality monitoring works are provided in Table 2.8. Copies of the calibration certificates for the equipment are presented in Annex F1.
Table 2.8 Impact Surface Water Quality Monitoring Details
|
Monitoring Station |
Location |
Frequency |
Monitoring Dates |
Parameter |
Equipment |
|
DP3 |
Surface water discharge point DP3 |
Weekly |
2, 8, 16, 23, 30 May 2019 |
•pH •DO •SS |
YSI Professional DSS (S/N: 17B102764) |
|
DP4, DP4 (Future, temporary) |
Surface water discharge point DP4 |
||||
|
DP6 |
Surface water discharge point DP6 |
||||
|
Notes: (a) DP4 was temporary relocated to DP4 (Future, temporary) (i.e. DP4T) as an interim discharge point from the monitoring event on 16 May 2019. |
|||||
2.3.2
Monitoring Schedule for the Reporting Month
The schedule for surface water quality monitoring during the reporting period is provided in Annex C.
2.3.3
Results and Observations
A total of 5 monitoring events for impact surface water quality monitoring were scheduled at all designated monitoring stations during the reporting period. However, sampling could not be carried out on 8 and 16 May 2019 at all monitoring locations due to insufficient flow. Impact water quality monitoring results and graphical presentations are provided in Annex F2.
Action and Limit Level exceedances were recorded for surface water quality impact monitoring in the reporting period and actions in accordance with the Event and Action Plan presented in Annex F3 were undertaken. Investigations on the Action and Limit Levels exceedances were conducted and summarized in Table 2.9 below. Investigation reports of the exceedances are presented in Annex F4.
Table 2.9 Details of Exceedances Recorded for Surface Water Quality Monitoring
|
Date |
Monitoring Location |
Parameter |
Type of Exceedance |
Remarks |
|
8 May 2019 |
DP6 |
pH |
Limit Level |
non Project-related |
|
8 May 2019 |
DP6 |
SS |
Limit Level |
non Project-related |
|
23 May 2019 |
DP3 |
pH |
Limit Level |
non Project-related |
|
23 May 2019 |
DP3 |
SS |
Limit Level |
non Project-related |
|
23 May 2019 |
DP4 (Future, temporary) |
pH |
Limit Level |
Project-related |
|
23 May 2019 |
DP4 (Future, temporary) |
SS |
Limit Level |
Project-related |
|
23 May 2019 |
DP6 |
pH |
Limit Level |
non Project-related |
|
23 May 2019 |
DP6 |
SS |
Limit Level |
Project-related |
|
30 May 2019 |
DP4 (Future, temporary) |
pH |
Limit Level |
non Project-related |
|
30 May 2019 |
DP4 (Future, temporary) |
SS |
Limit Level |
non Project-related |
|
30 May 2019 |
DP6 |
pH |
Limit Level |
non Project-related |
|
30 May 2019 |
DP6 |
SS |
Limit Level |
non Project-related |
Based on the investigation conducted for each of the monitoring event with potential Action and Limit Levels exceedances with the Contractor, and the IEC, the pH and SS exceedances at DP6 on 8 May 2019, pH and SS exceedances at DP3, pH exceedance at DP6 on 23 May 2019 and pH and SS exceedances at DP4 (Future, temporary) and DP6 on 30 May 2019 were considered not Project-related. However, upon further investigation, the pH and SS exceedances at DP4 (Future, temporary) and SS exceedance at DP6 on 23 May 2019 were found deemed to Project-related activities. The Contractor was reminded to implement all relevant mitigation measures for the construction works and maintain good site practice. The ET will keep track on the monitoring data and ensure Contractor’s compliance of the environmental requirements.
2.4
Landscape and Visual Monitoring
2.4.1
Monitoring Requirements
According to the updated EM&A Manual of the Project, the monthly landscape and visual audit was conducted on 23 May 2019 to monitor the implementation of the landscape and visual mitigation measures during construction phase.
All relevant environmental mitigation measures listed in the approved EIA Report and the EM&A Manual and their implementation status are summarised in Annex B.
2.4.2
Results and Observations
The Contractor has implemented environmental mitigation measures as stated in the approved EIA Report and the EM&A Manual.
Regarding the landscape and visual audit, the Contractor was reminded to identify the topsoil to be generated from the construction works and plan for the storage and re-use of the topsoil where practical. The Contractor shall consider the mitigation measures during the design phase, including the preparation of the Construction Drawings and Detailed Landscape Design Drawings. In addition, the Contractor was reminded to complete the advance screen planting works within 9 months of taking possession of the SENT Site (i.e. by September 2019).
2.5
EM&A Site Inspection
Site inspections were carried out on a weekly basis with the Contractor, IEC and ER to monitor the implementation of proper environmental pollution control and mitigation measures for air quality, noise, surface water quality and waste management under the Project. In the reporting period, 5 site inspections were carried out on 2, 9, 16, 23 and 30 May 2019.
Key observations during the site inspections are summarized in Table 2.10.
Table 2.10 Key Observations Identified during the Site Inspection in this Reporting Month
|
Inspection Date |
Environmental Observations and Recommendations |
|
2 May 2019 |
· The Contractor shall fix the water leakage issue of the Wetsep near DP6 to ensure it is functioning at all times. · The Contractor shall clean up the oil spillage near the sediment trap. · The Contractor shall provide drip tray for chemical container and remove the water from the drip tray. · The Contractor shall review the drainage system and avoid water discharge outside the site boundary. · The Contractor shall clear the general refuse near the refuse skip and sediment trap. |
|
9 May 2019 |
· The Contractor shall remove the soil near the fencing at Chun Wo’s vehicle entrance to reduce SS runoff. · The Contractor shall remove the wash-water and silt at the wheel washing facilities more frequently to avoid overflow. · The Contractor shall clear the general refuse at the site entrance and near future EPD Building to reduce odour and pest impacts. · The Contractor shall review the drainage system near DP6 to avoid accumulation of stagnant water and ensure the silt removal facility is functioning at all times. |
|
16 May 2019 |
· The Contractor shall maintain the temporary drain near DP4T to avoid accumulation of stagnant water and ensure the drainage system is functioning properly. · The Contractor shall remove the silt around the pump at the site entrance to ensure the silt removal facilities are functioning properly. · The Contractor shall provide drip tray for the chemical placed near the sediment trap. · The Contractor shall maintain the site drainage to avoid accumulation of stagnant water near sediment trap. · The Contractor shall maintain the Wetsep near DP6 to ensure it is functioning at all times. · The Contractor shall display a NRMM label to the hydraulic truck crane near the LTP and ensure the crane is not in use without the NRMM label. |
|
23 May 2019 |
· The Contractor shall remove the silt at the wheel washing facilities more frequently to ensure the facilities are functioning properly. · The Contractor shall remove the silt around the pump at the site entrance more frequently to ensure the silt removal facilities are functioning properly. · The Contractor shall provide drip tray for the chemical placed near the sediment trap and LTP. |
|
30 May 2019 |
· The Contractor shall remove the silt at the wheel washing facilities and near the facilities more frequently to ensure the facilities are functioning properly. · The Contractor shall provide drip trays for chemicals placed near DP6 and at the sediment trap. · The Contractor shall replace the NRMM label on the generator near LTP. · The Contractor shall dispose of the chemical waste and fuel inside the refuse skip at the sediment trap as chemical waste inside the chemical waste cabinet. |
The Contractor has rectified all of the observations identified during environmental site inspections in the reporting period.
2.6
Waste Management Status
The Contractor has registered as chemical waste producer under the Contract. Sufficient numbers of receptacles were available for general refuse collection and sorting.
As informed by the Contractor, waste generated during this reporting period include mainly non-inert construction waste. Reference has been made to the waste flow table prepared by the Contractor. The quantities of different types of wastes and imported fill materials are summarised in Table 2.11.
Table 2.11 Quantities of Different Waste Generated and Imported Fill Materials
|
Month/ Year |
Inert
C&D Materials (a) |
Imported
Fill |
Inert
Construction Waste Re-used |
Non-inert
Construction Waste (b) |
Recyclable Materials (c) (in ‘000kg) |
Chemical
Wastes |
|
|
Rock |
Soil |
||||||
|
1 – 31 May 19 |
0.015 |
0 |
3897.15 |
0 |
0.019 |
0 |
0 |
|
Notes: (a) Inert construction wastes include hard rock and large broken concrete, and materials disposed as public fill. Density assumption: 1.6 (kg/L) for public fill. (b) Non-inert construction wastes include general refuse disposed at landfill. Density assumption: 0.9 (kg/L) for general refuse. (c) Recyclable materials include metals, paper, cardboard, plastics and others. |
|||||||
2.7
Implementation Status of
Environmental Mitigation Measures
A summary of the Environmental Mitigation Implementation Schedule is presented in Annex B. The necessary mitigation measures were implemented properly for the Project.
2.8
Summary of Exceedances of the Environmental Quality
Performance Limit
Results for air quality monitoring (24-hour TSP) complied with the Action and Limit Levels in the reporting period. No Action and Limit Levels exceedances were recorded for construction noise monitoring. 6 Limit Level of pH exceedances and 6 Limit Level of Suspended Solids (SS) exceedances were recorded for surface water quality impact monitoring in the reporting period. The pH and SS exceedances at DP6 on 8 May 2019, pH and SS exceedances at DP3, pH exceedance at DP6 on 23 May 2019 and pH and SS exceedances at DP4 (Future, temporary) and DP6 on 30 May 2019 were considered not Project-related upon further investigation. The pH and SS exceedances at DP4 (Future, temporary) and SS exceedance at DP6 on 23 May 2019 were found deemed to Project-related activities.
Cumulative statistics on exceedances is provided in Annex G.
2.9
Summary of Complaints, Notification of Summons and
Successful Prosecutions
There were no complaints, notification of summons or prosecution recorded in the reporting period.
Statistics on complaints, notifications of summons, successful prosecutions are summarised in Annex G.
3
Future Key Issues
3.1
Construction Programme for the Coming Month
As informed by the Contractor, the major works for the Project in June 2019 will be:
· Continuation of site preparation in Area X1 and X2;
· Continuation of site clearance works at Area X1 and X2;
· Ongoing additional work excavating and removing unsuitable fill material and commencement of import material from SENT;
· Continuation of site formation works at Area X1;
· Continuation of fill works of perimeter bund for Cell 1X and 2X;
· Construction of Area A, construction of sediment trap and inlet box culvert X9 construction;
· Construction of buttress wall;
· Construction of raft foundation of Leachate Treatment Plant (LTP);
· Construction of CLP trench works in Part X2; and
Excavation of sediment trap discharge box culvert.
3.2
Key Issues for the Coming Month
Potential environmental impacts arising from the above upcoming construction activities in the next reporting period of June 2019 are mainly associated with the potential surface water impact in the coming rainy season. The ET will keep track on the construction works to confirm compliance of environmental requirements and the proper implementation of all necessary mitigation measures.
3.3
Monitoring Schedule for the Coming Month
The tentative schedules for environmental monitoring in June 2019 are provided in Annex H.
4
Conclusion and Recommendation
This EM&A Report presents the findings of the EM&A activities undertaken during the period from 1 to 31 May 2019 in accordance with the updated EM&A Manual and the requirements of the Environmental Permit (EP-308/2008/B).
Air quality (24-hour TSP), noise and water quality (DO, pH and SS) monitoring were carried out in the reporting period. Results for air quality monitoring (24-hour TSP) complied with the Action and Limit Levels in the reporting period. No Action and Limit Levels exceedances were recorded for construction noise monitoring. 6 Limit Level of pH exceedances and 6 Limit Level of Suspended Solids (SS) exceedances were recorded for surface water quality impact monitoring in the reporting period. The pH and SS exceedances at DP6 on 8 May 2019, pH and SS exceedances at DP3, pH exceedance at DP6 on 23 May 2019 and pH and SS exceedances at DP4 (Future, temporary) and DP6 on 30 May 2019 were considered not Project-related upon further investigation. The pH and SS exceedances at DP4 (Future, temporary) and SS exceedance at DP6 on 23 May 2019 were found deemed to Project-related activities.
Environmental site inspections were carried out during the reporting period. Recommendations on remedial actions were given to the Contractor for the deficiencies identified during the site inspections.
There were no complaints, notification of summons or prosecution recorded in the reporting period.
The ET will keep track on the construction works to confirm compliance of environmental requirements and the proper implementation of all necessary mitigation measures.