|
Rev. |
Description of Modification |
Date |
|
A |
First Issue for Comments |
29/11/2022 |
|
B |
Revised according to IEC and SOR comment |
30/12/2022 |
Summary of Monitoring Exceedance, Complaints, Notification of Summons and Prosecutions 25
Appendix B Overview of Desalination Plant in Tseung Kwan O
Appendix
C Summary
of
Implementation Status of
Environmental Mitigation
Appendix D Water Quality Monitoring Graphical Presentation
Appendix E Summary
of
Exceedances
Appendix F Waste Flow Table
Appendix G Complaint Log
Appendix H Event/Action Plan for Water Quality Monitoring
Appendix I Event/Action Plan for Construction Noise Exceedance
Introduction
A1. The Project, Design, Build and Operate First Stage of Tseung Kwan O Desalination Plant (TKODP), is a Designated Project under the Environmental Impact Assessment Ordinance (Cap. 499) (EIAO) and is currently governed by a Further Environmental Permit (EP No. FEP - 01/503/2015/A) for the construction and operation of the Contract.
A2. In accordance with the Environmental Monitoring and Audit (EM&A) Manual for the Contract, EM&A works for marine water quality, noise, waste management and ecology should be carried out by Environmental Team (ET), Acuity Sustainability Consulting Limited (ASCL), during the construction phase of the Contract.
A3. This is the 10th Quarterly EM&A Report, prepared by ASCL, for the Contract summarizing the monitoring results and audit findings of the EM&A programme at and around Tseung Kwan O Area 137 (TKO 137) during the reporting period from 1 June to 31 August 2022.
A4. The EM&A programme for this contract has covered environmental monitoring on construction noise level at selected NSRs and Contractor’s environmental performance auditing in the aspects of construction dust, construction noise, water quality, waste management, Landscape and Visual and Ecology.
Summary of Main Works Undertaken & Key Mitigation Measures Implemented
A5. Key activities carried out in this reporting period for the Project included the followings:
ActiDAFF
- Underground utility (UU) Construction Work
- Water proofing work on roof of Cartridge Filter Plant Room and Construction of kiosk and installation of louvre
- Construction of Side Tanks No. 5 ‐ 8
- Installation of GRP Casts in Media Chambers co. 9 ‐ 16
CLP 132kV Substation
- Underground utility (UU) Construction Work
- Construction of temporary emergency vehicular access (eva)
On-Site Chlorine Generation Building (OSCG Bldg)
- Internal finishing work
- Water tightness test of water tank & flat roof
CO2 Tank Area
- Internal finishing work
Administration Building
- Construction of parapet and internal finishes at G/F, 1/F and 2/F
- Installation of hoarding on 2/F
- Construction of 3/F to 4/F walls and columns
- Installation of curtain wall supports
Inspection corridor
- Construction of stair tower and Steel fixing works for segment 6 and segment 4
- Construction of columns and beams of FT-5, FT6, FT7 and FT-8
Post Treatment Building (PTB)
- Construction of Sludge thickener, Post Treatment Building
- Water tightness test of water tank & flat roof
Product Water Storage Tank (PWST)
- Underground utility (UU) Construction Work
- Carbon steel pipe installation Work
- Design for Manufacturing and Assembly (DfMA) installation at PWST South side
- Water tightness test of water tank & flat roof
Chemical Building
- Underground utility (UU) Construction Work
- Water proofing work on roof
- Carrying out of Finishing works in the Plant Room
Reverse Osmosis (RO) Building
- Underground utility (UU) Construction Work
- Staircases and internal finishing work
- DfMA installation at RO Building North side
- Water tightness test of water tank & flat roof
Main Electrical and Central Chiller Plant building (MECCP)
- Installation of louvre, metal doors and timber doors
- Water tightness test of water tank & flat roof
Outfall Shaft
- Install marine outfall structure, concreting, GRP Pipe installation, Dredging for diffuser
- Bulkhead installation at Outfall tunnel
Intake Shaft
- Levelling of formation level & install marine intake structure
- General cleaning for finial inspection and flooded by seawater at Intake tunnel
Combined Shaft
- Permanent structure construction from +4.9mPD to +15.3mPD
Pump room
- Permanent structure Wall construction from +6.8 to 14.3mPD
Open Channel
- Trench excavation and structure installation, grouting and backfill
Slope
- Excavation at slope toe and access erection, mini piles construction
EM&A Works
- Installation of building services, Lifting of steel tanks at Chemical Building
- Installation of building services at Administration Building
- Installation of building services, Lifting of lime silo, filter press and piping at PTB
- Installation of building services, mechanical equipment, steel pipe at PWST
- Installation of building services, steel pipe, Glass fiber reinforced plastics pipe pipe and lifting of electrical switchboard at RO Building
- Installation of chillers, building services and electrical switchboard at MECCP
- Scaffolding, installation of mechanical equipment and piping at ActiDAFF
A6. The major environmental impacts brought by the above construction works include:
- Construction dust and noise generation from marine construction works, excavation works, excavation works, construction works, rock cutting works and pipe pilling driving works;
- Waste generation from the construction activities
- Impact on water quality from marine construction works and inland construction works
A7. The key environmental mitigation measures implemented for the Project in this reporting period associated with the above construction works include:
- Dust suppression by regular wetting and water spraying for construction works;
- Reduction of noise from equipment and machinery on-site and regularly inspection to machinery and plants/vehicles on-site to ensure proper functioning;
- Sorting and storage of general refuse and construction waste; and
- Deployment of temporary silt curtain in the area where marine construction works were conducted and deployment of water sedimentation tanks for treatment of wastewater at inland areas before discharge
Summary of Exceedance & Investigation & Follow-up
A8. No noise monitoring was conducted during the reporting period since there are no project- related construction activities undertaken within a radius of 300m from the monitoring locations. No exceedance of the Action Level was recorded during the reporting period.
A9. The EM&A works for water quality were conducted during the reporting period in accordance with the EM&A Manual.
A10. Water quality monitoring was conducted as schedule in the reporting period. Forty -four (44) action level exceedances and twenty-five (25) limit level exceedances for suspended solids (SS) of impact water quality monitoring were recorded in the reporting period. All action and limit level exceedances were concluded non-project related.
A11. As commented by EPD on the determination of action and limit level exceedance for water quality monitoring, the monitoring result is considered as exceedance if it exceeds either the 95%-ile of baseline data or 20% exceedance of value at any impact station compared with corresponding data from control station.
A12. In view of that all water quality monitoring result from March 2021 to August 2022 were reviewed using the above-mentioned determination method to reassess the number of action and limit level exceedances since the commencement of water quality monitoring.
A13. Total one thousand one hundred and sixty-nine (1169) action level exceedances and five hundred and sixty-two (562) limit level exceedances for turbidity were recorded during mid flood tide since the commencement of the water quality monitoring and one thousand two hundred and thirty-seven (1237) action level exceedances, and six hundred and five (605) limit level exceedances for turbidity were recorded during mid ebb tide since the commencement of the water quality monitoring. Whenever a data exceedance occurred, remeasurement at the same monitoring location was immediately conducted. Fortunately, no average turbidity data exceedances have ever been identified after such remeasurement.
A14. Total six hundred and ninety-seven (697) action level exceedances and five hundred and sixteen (516) limit level exceedances for suspended solids were recorded during mid flood tide since the commencement of the water quality monitoring and eight hundred and sixteen (816) action level exceedances and six hundred and ten (610) limit level exceedances for suspended solids were recorded during mid ebb tide since the commencement of the water quality monitoring.
A15. In this reporting period, 104 times of landfill gas monitoring were recorded at Wan Po Road (Ch1+513 - Ch1+625). No action and limit level exceedance for methane, oxygen and carbon dioxide was recorded.
A16. Weekly site inspections of the construction works were also carried out by ET to audit the mitigation measures implementation status. Thirteen (13) times of weekly Joint site inspections were carried out by ET and IEC.
A17. A summary of the EM&A activities in this reporting period is listed in Table I and summary of the environmental exceedance of the reporting period is tabulated in Table II.
|
EM&A Activities |
June 2022 |
July 2022 |
August 2022 |
|
Noise Monitoring |
N/A |
N/A |
N/A |
|
Water Quality Monitoring |
2, 4, 7, 9, 11, 13, 15, 17 20, 22, 24, 28 and 30 Jun 2022 |
5, 7, 9, 12, 14, 16, 19, 21, 23, 26, 28 and 30 Jul 2022 |
2, 4, 6, 9, 11, 13, 15, 17, 21, 23, 27 and 30 Aug 2022 |
|
Landfill Gas monitoring |
N/A |
2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 25, 26, 27, 28, 29 and 30 Jul 2022 |
1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20, 22, 23, 24, 25, 26, 27, 29, 30 and 31 Aug 2022 |
|
Environmental Site Inspection |
7, 14, 21 and 28 Jun 2022 |
5, 12, 19 and 29 Jul 2022 |
2, 9, 16, 23 and 31 Aug 2022 |
Table II Summary Table for Exceedance in the Reporting Period
|
Environmental Monitoring |
Parameter |
No. of non- Project related exceedance |
Total No. of non-Project related exceedance |
No. of Project related exceedance |
Total No. of Project related exceedance |
||
|
AL |
LL |
AL |
LL |
||||
|
Noise |
Leq (30min) |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
|
Water |
DO |
0 |
0 |
0 |
0 |
0 |
0 |
|
Turbidity |
0 |
0 |
0 |
0 |
0 |
0 |
|
|
SS |
44 |
25 |
69 |
0 |
0 |
0 |
|
|
pH |
0 |
0 |
0 |
0 |
0 |
0 |
|
|
Salinity |
0 |
0 |
0 |
0 |
0 |
0 |
|
|
Landfill Gas |
O2 |
0 |
0 |
0 |
0 |
0 |
0 |
|
CH4 |
0 |
0 |
0 |
0 |
0 |
0 |
|
|
CO2 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Complaint Handling and Prosecution
A18. One environmental complaint was received from the EPD in the reporting period, no notifications of summons and prosecution was received during the reporting period.
Reporting Change
A19. There was no change to be reported that may affect the on-going EM&A programme.
Basic Project InformationThe Acciona Agua, S.A. Trading, Jardine Engineering Corporation Limited and China State Construction Engineering (Hong Kong) Limited and as AJC Joint Venture (AJCJV) is contracted to carry out the Design, Build and Operate First Stage of Tseung Kwan O Desalination Plant (DPTKO) under Contract No. 13/WSD/17 (the Contract).
Acuity Sustainability Consulting Limited (ASCL) is commissioned by AJCJV to undertake the Environmental Team (ET) services as required and/or implied, both explicitly and implicitly, in the Environmental Permit (EP), Environmental Impact Assessment Report (EIA Report) (Register No. AEIAR-192/2015) and Environmental Monitoring and Audit Manual (EM&A Manual) for the Contract; and to carry out the Environmental Monitoring and Audit (EM&A) programme in fulfillment of the EIA Report’s EM&A requirements and Contract No. 13/WSD/17 Specification requirements.
Pursuant to the Environmental Impact Assessment Ordinance (EIAO), the Director of Environmental Protection granted the Environmental Permit (No. EP-01/503/2015) and Variation of Environmental Permit (No. EP-01/503/2015/A) to Water Supplies Department (WSD); and granted the Further Environmental Permit (No. FEP-01/503/2015/A) to AJCJV for the Contract.
This is the 10th Quarterly EM&A Report for the Project which summarizes the key findings of the EM&A programme during the reporting period from 1 June 2022 to 31 August 2022.
The Project Organization structure for Construction Phase is presented in Figure 1.1.
Contact details of the key personnel are presented in Table 1.1 below:
Table 1.1 Contact Details of Key Personnel
|
Party |
Position |
Name |
Telephone no. |
|
Project Proponent |
SE/CM2 |
Benny Lam |
2634-3573 |
|
Supervising Officer (Binnies Hong Kong Limited) |
Project Manager |
Christina Ko |
2608-7302 |
|
Chief Resident Engineer |
Roger Wu |
6343-1002 |
|
|
The Jardine Engineering Corporation, Limited, China State Construction Engineering (Hong Kong) Limited and Acciona Agua, S.A. Trading |
Project Manager |
Stephen Yeung |
2807-4665 |
|
Environmental Monitoring Manager |
Brian Kam |
9456-9541 |
|
|
Acuity Sustainability Consulting Limited |
Environmental Team Leader |
Jacky Leung |
2698-6833 |
|
ANewR Consulting Limited |
Independent Environmental Checker (IEC) |
Louis Kwan |
2618-2831 |
Details of the major construction activities undertaken in this reporting period are shown as below. The construction programme is presented in Appendix A.
ActiDAFF
- Underground utility (UU) Construction Work
- Water proofing work on roof of Cartridge Filter Plant Room and Construction of kiosk and installation of louvre
- Construction of Side Tanks No. 5 ‐ 8
- Installation of GRP Casts in Media Chambers co. 9 ‐ 16
CLP 132kV Substation
- Underground utility (UU) Construction Work
- Construction of temporary emergency vehicular access (eva)
On-Site Chlorine Generation Building (OSCG Bldg)
- Internal finishing work
- Water tightness test of water tank & flat roof
CO2 Tank Area
- Internal finishing work
Administration Building
- Construction of parapet and internal finishes at G/F, 1/F and 2/F
- Installation of hoarding on 2/F
- Construction of 3/F to 4/F walls and columns
- Installation of curtain wall supports
Inspection corridor
- Construction of stair tower and Steel fixing works for segment 6 and segment 4
- Construction of columns and beams of FT-5, FT6, FT7 and FT-8
Post Treatment Building (PTB)
- Construction of Sludge thickener, Post Treatment Building
- Water tightness test of water tank & flat roof
Product Water Storage Tank (PWST)
- Underground utility (UU) Construction Work
- Carbon steel pipe installation Work
- Design for Manufacturing and Assembly (DfMA) installation at PWST South side
- Water tightness test of water tank & flat roof
Chemical Building
- Underground utility (UU) Construction Work
- Water proofing work on roof
- Carrying out of Finishing works in the Plant Room
Reverse Osmosis (RO) Building
- Underground utility (UU) Construction Work
- Staircases and internal finishing work
- DfMA installation at RO Building North side
- Water tightness test of water tank & flat roof
Main Electrical and Central Chiller Plant building (MECCP)
- Installation of louvre, metal doors and timber doors
- Water tightness test of water tank & flat roof
Outfall Shaft
- Install marine outfall structure, concreting, GRP Pipe installation, Dredging for diffuser
- Bulkhead installation at Outfall tunnel
Intake Shaft
- Levelling of formation level & install marine intake structure
- General cleaning for finial inspection and flooded by seawater at Intake tunnel
Combined Shaft
- Permanent structure construction from +4.9mPD to +15.3mPD
Pump room
- Permanent structure Wall construction from +6.8 to 14.3mPD
Open Channel
- Trench excavation and structure installation, grouting and backfill
Slope
- Excavation at slope toe and access erection, mini piles construction
EM&A Works
- Installation of building services, Lifting of steel tanks at Chemical Building
- Installation of building services at Administration Building
- Installation of building services, Lifting of lime silo, filter press and piping at PTB
- Installation of building services, mechanical equipment, steel pipe at PWST
- Installation of building services, steel pipe, Glass fiber reinforced plastics pipe pipe and lifting of electrical switchboard at RO Building
- Installation of chillers, building services and electrical switchboard at MECCP
- Scaffolding, installation of mechanical equipment and piping at ActiDAFF
A summary of the valid permits, licences, and /or notifications on environmental protection for this Project is presented in Table 1.2.
|
Permit/ Licenses/ Notification |
Reference |
Validity Period |
|
Environmental Permit |
FEP - 01/503/2015/A |
Throughout the Contract |
|
Notification of Construction Works under the Air Pollution Control (Construction Dust) Regulation (Form NA) |
Ref. No.: 451539 |
- |
|
Billing Account for Disposal of Construction Waste |
7036276 |
Throughout the Contract |
|
Chemical Waste Producer Registration |
5213-839-A2987-01 |
Throughout the Contract |
|
Wastewater Discharge Licence (Land and Marine works) |
WT00035775-2020 |
24/07/2020 - 31/07/2025 |
|
Construction Noise Permit for general works, TBM at combined shaft and marine works |
GW-RE0337-22 |
01/05/2022 - 31/10/2022 |
|
GW-RE0627-22 |
29/06/2022 - 21/12/2022 |
The status for all environmental aspects is presented in Table 1.3.
|
Parameters |
Status |
|
Water Quality |
|
|
Baseline Monitoring under EM&A Manual |
The baseline water quality monitoring was conducted between 12 May 2020 and 6 June 2020 |
|
Impact Monitoring |
On-going |
|
Noise |
|
|
Baseline Monitoring |
The baseline noise monitoring result has been reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.4 |
|
Impact Monitoring |
On-going |
|
Waste Management |
|
|
Mitigation Measures in Waste Management Plan |
On-going |
|
Landfill Gas |
|
|
Regular Monitoring when Construction Works are within the 250m Consultation Zone |
In this reporting period, 104 times of landfill gas monitoring were recorded at Wan Po Road (Ch1+360 - Ch1+513). No exceedance of action and limit level for methane, oxygen and carbon dioxide was observed. |
|
Environmental Audit |
|
|
Site Inspection covering Measures of Air Quality, Noise Impact, Water Quality, Waste, Ecological Quality, Fisheries, Landscape and Visual |
On-going |
Other than the EM&A work by ET, environmental briefings, trainings and regular environmental management meetings were conducted, in order to enhance environmental awareness and closely monitor the environmental performance of the contractors.
The EM&A programme has been implemented in accordance with the recommendations presented in the approved EIA Report and the EM&A Manual. A summary of implementation status of the environmental mitigation measures for the construction phase of the Project during the reporting period is provided in Appendix C.
NoiseTo ensure no adverse noise impact, construction noise monitoring is recommended to be carried out within 300m radius from the nearby noise sensitive receivers (NSRs), during construction phase. The NSRs selected as monitoring station are (i) NSR4 - Creative Secondary School, (ii) NSR24 - PLK Laws Foundation College, and (iii) NSR31 - School of Continuing and Professional Studies - CUHK respectively.
No impact construction noise monitoring was conducted in the reporting period due to the overly distant monitoring station from the works location, where they were farther than 1 km from the closet monitoring station NSR4 to the works location.
Construction noise level would be measured in terms of the A-weighted equivalent continuous sound pressure level (LAeq). Leq 30min was used as the monitoring parameter for the time period between 0700 and 1900 on normal weekdays. Table 2.1 summarizes the monitoring parameters, frequency and duration of the impact noise monitoring.
Table 2.1 Noise Monitoring
Parameters, Time, Frequency and Duration
|
Time |
Duration |
Interval |
Parameters |
|
Daytime: 0700-1900 |
Day time: 0700-1900 (during normal weekdays) |
Continuously in Leq 5min/Leq 30min (average of 6 consecutive Leq 5min) |
Leq 30min L10 30min & L90 30min |
The monitoring locations should normally be made at a point 1m from the exterior of the NSRs building façade and be at a position 1.2m above the ground. A correction of +3dB(A) should be made to the free-field measurements.
According to the environmental findings detailed in the EIA report and Baseline Monitoring Report, the designated locations for the construction noise monitoring are listed in Table 2.2 below.
|
NSR ID |
Noise Sensitive Receivers |
Monitoring Location |
Position |
|
NSR 4 |
Creative Secondary School |
Roof Floor |
1 m from facade |
|
NSR 24 |
PLK Laws Foundation College |
Pedestrian Road on Ground Floor |
Free-field |
|
NSR 31 |
School of Continuing and Professional Studies - CUHK |
Roof Floor |
1 m from facade |
The monitoring locations should normally be made at a point 1m from the exterior of the NSRs building façade and be at a position 1.2m above the ground. A correction of +3dB(A) should be made to the free-field measurements. Three noise monitoring locations for impact monitoring at the nearby sensitive receivers are shown in Figure 2.1-2.3.
|
|
|
Figure 2.1 NSR4 Creative Secondary School |
|
|
|
Figure 2.2 NSR24 PLK Laws Foundation College |
|
|
|
Figure 2.3 NSR31 School of Continuing and Professional Studies - CUHK |
The Action/Limit Levels are in line with the criteria of Practice Note for Professional Persons (ProPECC PN 2/93) “Noise from Construction Activities - Non-statutory Controls” and Technical Memorandum on Environmental Impact Assessment Process issued by HKSAR Environmental Protection Department [“EPD”] under the Environmental Impact Assessment Ordinance, Cap 499, S.16 are presented in Table 2.3.
|
Time Period |
Action Level |
Limit Level (dB(A)) |
|
0700-1900 on normal weekdays |
When one documented complaint is received from any one of the noise sensitive receivers |
- 70 dB(A) for school and - 65 dB(A) during examination period |
Notes: Limits
specified
in
the
GW-TM
and
IND-TM
for
construction
and
operation
noise,
respectively.
If exceedances were found during noise monitoring, the actions in accordance with the Event and Action Plan shall be carried out according to Appendix E.
Referring to EM&A manual Section 4.1.2, the impact noise monitoring should be carried out when there are project-related construction activities undertaken within a radius of 300m from the monitoring stations. No noise monitoring station was located within a radius of 300m of the Project site as shown in Figure 2.4, no impact monitoring for noise impact was conducted in the reporting period.
Figure 2.4 Site Layout Plan with Noise Sensitive Receivers and Desalination Plant
Water QualityIn accordance with the recommendations of the EIA, water quality monitoring is required during dredging for the submarine pipelines and, during operation phase. In addition, baseline water quality monitoring was conducted prior to the commencement of marine construction activities.
The following Section provides details of the water quality monitoring to be undertaken by the Environmental Team (ET) to verify the distance of sediment and brine plume dispersion and to identify whether the potential exists for any indirect impacts to occur to ecological sensitive receivers. The water quality monitoring programme was carried out to allow any deteriorating water quality to be readily detected and timely action taken to rectify the situation.
Water quality monitoring for the Project can be divided into the following stages:
- Dredging activities during construction phase;
- Discharge of effluent from main disinfection during construction phase;
- Operation phase - first year upon commissioning; and,
- Continuous monitoring of effluent quality.
The parameters that
have
been
selected for measurement
in
situ
and
in
the
laboratory are those that were
either
determined in the EIA to be those
with the
most
potential to be affected by the construction works or are a standard check on water quality conditions. Parameters measured in the impact monitoring are listed in Table 3.1
|
Parameters |
Unit |
Abbreviation |
|
In-situ measurements |
||
|
Dissolved oxygen |
mg/L |
DO |
|
Temperature |
oC |
- |
|
pH |
- |
- |
|
Turbidity |
NTU |
- |
|
Salinity |
0/00 |
- |
|
Laboratory measurements |
||
|
Suspended Solids |
mg/L |
SS |
In addition to the water quality parameters, other relevant data were measured and recorded in Water Quality Monitoring Logs, including the location of the sampling stations, water depth, time, weather conditions, sea conditions, tidal stage, current direction and velocity, special phenomena and work activities undertaken around the monitoring and works area that may influence the monitoring results.
The impact
water
quality
monitoring locations are
detailed in Table 3.2 and
shown
in
Figure
3.1 below.
Table 3.2 Location
of Impact Water Quality
Monitoring Station
|
Station |
Easting |
Northing |
Description |
|
CE |
843550 |
815243 |
Upstream control station at ebb tide |
|
CF |
846843 |
810193 |
Upstream control station at flood tide |
|
WSR1 |
846864 |
812014 |
Ecological sensitive receiver at Tung Lung Chau |
|
WSR2 |
847645 |
812993 |
Fisheries sensitive receiver at Tung Lung Chau |
|
WSR3 |
848023 |
813262 |
Ecological sensitive receiver at Tung Lung Chau |
|
WSR4 |
847886 |
814154 |
Ecological sensitive receiver at Tai Miu Wan |
|
WSR16 |
845039 |
815287 |
Ecological sensitive receiver at Fat Tong Chau |
|
WSR33 |
847159 |
814488 |
Ecological sensitive receiver at Tai Miu Wan |
|
WSR36 |
846878 |
814081 |
Ecological sensitive receiver at Kwun Tsai |
|
WSR37 |
846655 |
813810 |
Ecological sensitive receiver at Tit Cham Chau |
|
NF1 |
846542 |
813614 |
Edge of mixing zone, ~ 200m west of outfall diffuser |
|
NF2 |
846942 |
813614 |
Edge of mixing zone, ~ 200m east of outfall diffuser |
|
NF3 |
846742 |
813414 |
Edge of mixing zone, ~ 200m south of outfall diffuser |
Figure
3.1 Impact
Water Quality Monitoring
Locations under
EM&A Manual
The monitoring methodology, equipment used, and QA/QC procedures could be referring to Section 3.1.2 -3.1.4, 3.1.6-3.1.7 and 3.2 of the Monthly EM&A Report.
The Action and Limit Levels have been set based on the derivation criteria specified in the EM&A Manual and based on the baseline water quality monitoring data and the derivation criteria, the Action/Limit Levels have been derived and are presented in Table 3.3.
|
Parameters |
Action |
Limit |
|
|
Construction Phase Impact Monitoring |
|||
|
DO in mg/L |
Surface and Middle |
Surface and Middle |
|
|
|
7.30 mg L-1 |
4 mg L-1 |
|
|
|
Bottom |
Bottom |
|
|
|
7.31 mg L-1 |
2 mg L-1 |
|
|
|
Tung Lung Chau Fish Culture Zone |
Tung Lung Chau Fish Culture Zone |
|
|
|
5.1 mgL-1 or level at control station |
5.0 mgL-1 or level at control station |
|
|
|
(Whichever the lower) |
(Whichever the lower) |
|
|
SS in |
mg/L |
5.00 mg L-1 or 20% exceedance of |
6.00 mg L-1 or 30% exceedance of |
|
(Depth- |
|
value at any impact station compared |
value at any impact station |
|
averaged) |
|
with corresponding data from control |
compared with corresponding data |
|
|
|
station |
from control station |
|
Turbidity in NTU |
2.41 NTU or 20% exceedance of value |
2.84 NTU or 30% exceedance of |
|
|
(Depth- |
at any impact station compared with |
value at any impact station |
|
|
averaged) |
corresponding data from control |
compared with corresponding data |
|
|
|
station |
from control station |
|
Notes:
i.
"Depth-averaged"
is
calculated
by
taking
the
arithmetic
means
of
reading
of
all
three
depths.
ii.
For DO,
non-compliance
of
the
water
quality
limits
occurs
when
monitoring
result
is
lower
than
the
limits.
iii.
For Turbidity,
SS,
iron
and
Salinity,
non-compliance
of
the
water
quality
limits
occurs
when
monitoring result is higher than the limits.
General water quality monitoring at the ten monitoring stations (CE, CF, WSR1, WSR2, WSR3, WSR4, WSR16, WSR33, WSR36 and WSR37) were conducted as schedule in the reporting month.
Forty -four (44) of the general water quality monitoring results of suspended solids (SS) obtained had exceeded the Action Level. Twenty-five (25) of the general water quality monitoring results of SS obtained during the reporting quarter had exceeded the Limit Level.
Investigation on the reason of exceedance has been carried out, where the exceedances of SS were concluded to be unrelated to the project. Details of the instigation could be referring to Monthly EM&A Report Appendix O.
As commented by EPD on the determination of action and limit level exceedance for water quality monitoring, the monitoring result is considered as exceedance if it exceeds either the 95%-ile of baseline data or 20% exceedance of value at any impact station compared with corresponding data from control station.
In view of that all water quality monitoring result from March 2021 to August 2022 were reviewed using the above-mentioned determination method to reassess the number of action and limit level exceedances since the commencement of water quality monitoring.
Total one thousand one hundred and sixty-nine (1169) action level exceedances and five hundred and sixty-two (562) limit level exceedances for turbidity were recorded during mid flood tide since the commencement of the water quality monitoring and one thousand two hundred and thirty-seven (1237) action level exceedances, and six hundred and five (605) limit level exceedances for turbidity were recorded during mid ebb tide since the commencement of the water quality monitoring. Whenever a data exceedance occurred, remeasurement at the same monitoring location was immediately conducted. Fortunately, no average turbidity data exceedances have ever been identified after such remeasurement.
Total six hundred and ninety-seven (697) action level exceedances and five hundred and sixteen
(516) limit level exceedances for suspended solids were recorded during mid flood tide since the commencement of the water quality monitoring and eight hundred and sixteen (816) action level exceedances and six hundred and ten (610) limit level exceedances for suspended solids were recorded during mid ebb tide since the commencement of the water quality monitoring.
Algal Bloom and red tide were observed at the marine water near CEDD pier, Outfall Shaft and Intake Shaft on 21 July 2022, 1 August 2022 by the Contractor. According to Agriculture, Fisheries and Conservation Department (AFCD) previous red tide occurrences record, five red tides were spotted in Hong Kong including Tung Lung Chau fish culture zone and Junk Bay on 21 July 2022. Also, as reported by the Contractor on 26 August 2022, silty plume was observed originated from the beach adjacent to the Country Park. No evidence shown that the silty plume was caused / related to the Project. It is concluded that the incident was non-Project related. ET will closely monitor the water quality and the implementation of water mitigation measure, to ensure no adverse impact to water quality and ecology.
AFCD Previous Red Tide Occurrences Record: https://www.afcd.gov.hk/english/fisheries/hkredtide/update/redtide_prev_record.html
Table 3.4 Summary of Regular Impact Water Quality Monitoring Results (Mid-Flood)
|
Location |
Parameter |
|||||||||||||||||||||
|
Salinity (ppt) |
Dissolved Oxygen (mg/L) |
pH |
Turbidity (NTU) |
Suspended Solids (mg/L) |
Temp. (oC) |
|||||||||||||||||
|
Surface & Middle |
Bottom |
|||||||||||||||||||||
|
Jun |
Jul |
Aug |
Jun |
Jul |
Aug |
Jun |
Jul |
Aug |
Jun |
Jul |
Aug |
Jun |
Jul |
Aug |
Jun |
Jul |
Aug |
Jun |
Jul |
Aug |
||
|
CE |
Avg. |
31.5 |
30.9 |
30.6 |
9.1 |
9.2 |
8.9 |
9.1 |
9.2 |
8.9 |
8.2 |
8.2 |
8.2 |
3.9 |
3.2 |
3.4 |
3.4 |
3.1 |
3.8 |
26.6 |
28.2 |
28.4 |
|
Min. |
30.2 |
29.4 |
28.4 |
8.2 |
8.2 |
8.5 |
8.3 |
8.4 |
8.4 |
8.1 |
8.1 |
8.0 |
2.6 |
2.6 |
2.8 |
2.5 |
2.5 |
2.5 |
21.5 |
21.5 |
21.5 |
|
|
Max |
32.8 |
32.8 |
32.9 |
9.8 |
10.2 |
9.7 |
9.7 |
10.1 |
9.6 |
8.4 |
8.5 |
8.4 |
6.2 |
4.2 |
4.4 |
6.0 |
6.0 |
19.0 |
28.5 |
30.4 |
30.6 |
|
|
CF |
Avg. |
31.2 |
30.7 |
30.3 |
9.0 |
9.0 |
8.8 |
8.9 |
9.0 |
8.8 |
8.2 |
8.2 |
8.2 |
4.5 |
3.8 |
3.8 |
3.9 |
3.2 |
3.8 |
26.9 |
28.8 |
29.2 |
|
Min. |
29.6 |
29.4 |
28.1 |
8.1 |
8.5 |
8.2 |
8.1 |
8.6 |
8.4 |
8.1 |
8.1 |
8.0 |
3.1 |
2.9 |
3.0 |
2.5 |
2.5 |
2.5 |
25.2 |
27.7 |
28.6 |
|
|
Max |
32.5 |
32.4 |
31.7 |
9.7 |
9.6 |
9.7 |
9.7 |
9.5 |
9.6 |
8.4 |
8.4 |
8.3 |
6.6 |
5.0 |
4.8 |
10.0 |
8.0 |
9.0 |
28.2 |
30.4 |
30.1 |
|
|
WSR1 |
Avg. |
31.2 |
30.9 |
30.5 |
9.0 |
9.1 |
9.0 |
9.0 |
9.1 |
9.0 |
8.2 |
8.2 |
8.2 |
3.3 |
2.5 |
2.6 |
3.8 |
3.3 |
3.8 |
27.0 |
28.9 |
29.3 |
|
Min. |
30.0 |
29.2 |
28.7 |
8.1 |
8.2 |
8.1 |
8.1 |
8.2 |
8.1 |
8.1 |
8.1 |
8.0 |
2.1 |
1.8 |
2.0 |
2.5 |
2.5 |
2.5 |
25.3 |
27.9 |
28.5 |
|
|
Max |
33.0 |
32.5 |
32.1 |
10.0 |
10.0 |
9.7 |
9.9 |
9.9 |
9.8 |
8.4 |
8.4 |
8.4 |
5.3 |
3.9 |
3.4 |
8.0 |
9.0 |
9.0 |
28.5 |
30.7 |
30.3 |
|
|
WSR2 |
Avg. |
31.4 |
30.7 |
30.2 |
9.0 |
8.9 |
8.9 |
9.0 |
8.9 |
8.9 |
8.3 |
8.2 |
8.2 |
2.6 |
2.5 |
2.3 |
3.7 |
3.1 |
4.0 |
27.0 |
28.9 |
29.1 |
|
Min. |
30.2 |
29.3 |
28.8 |
8.2 |
8.4 |
8.5 |
8.2 |
8.3 |
8.5 |
8.1 |
8.0 |
8.1 |
1.9 |
1.9 |
1.8 |
2.5 |
2.5 |
2.5 |
25.3 |
27.8 |
28.1 |
|
|
Max |
32.9 |
32.1 |
32.7 |
9.8 |
9.5 |
9.5 |
9.6 |
9.5 |
9.3 |
8.4 |
8.4 |
8.3 |
4.3 |
3.8 |
3.3 |
9.0 |
6.0 |
9.0 |
28.5 |
30.3 |
30.2 |
|
|
WSR3 |
Avg. |
31.3 |
30.8 |
30.5 |
9.1 |
9.1 |
8.9 |
9.1 |
9.1 |
8.9 |
8.2 |
8.2 |
8.2 |
3.1 |
2.6 |
2.7 |
3.4 |
3.4 |
4.5 |
26.8 |
28.8 |
29.2 |
|
Min. |
29.4 |
29.3 |
28.2 |
8.2 |
8.5 |
8.0 |
8.2 |
8.6 |
8.1 |
8.1 |
8.0 |
8.1 |
1.9 |
1.9 |
2.2 |
2.5 |
2.5 |
2.5 |
25.2 |
28.0 |
28.4 |
|
|
Max |
32.4 |
32.6 |
31.8 |
9.9 |
10.2 |
10.0 |
10.0 |
10.2 |
9.8 |
8.4 |
8.4 |
8.3 |
5.6 |
3.4 |
3.5 |
5.0 |
8.0 |
9.0 |
28.0 |
30.5 |
30.1 |
|
|
WSR4 |
Avg. |
31.4 |
30.7 |
30.5 |
8.9 |
8.9 |
8.9 |
8.9 |
8.9 |
8.9 |
8.3 |
8.2 |
8.2 |
3.4 |
2.6 |
2.5 |
3.8 |
3.5 |
4.3 |
26.9 |
28.8 |
29.1 |
|
Min. |
30.0 |
29.5 |
29.2 |
8.3 |
8.4 |
8.2 |
8.4 |
8.4 |
8.2 |
8.1 |
8.1 |
8.1 |
2.2 |
1.9 |
2.0 |
2.5 |
2.5 |
2.5 |
25.2 |
27.6 |
28.2 |
|
|
Max |
32.6 |
32.3 |
32.3 |
10.0 |
9.7 |
9.5 |
9.9 |
9.5 |
9.4 |
8.4 |
8.3 |
8.4 |
5.4 |
3.5 |
3.5 |
9.0 |
9.0 |
10.0 |
28.7 |
30.8 |
30.6 |
|
|
WSR16 |
Avg. |
31.3 |
30.7 |
30.4 |
9.0 |
9.0 |
9.0 |
9.0 |
9.0 |
9.0 |
8.3 |
8.2 |
8.2 |
3.2 |
2.7 |
2.7 |
3.7 |
3.5 |
3.7 |
27.0 |
28.9 |
29.2 |
|
Min. |
30.3 |
29.5 |
28.9 |
8.1 |
8.2 |
8.5 |
8.2 |
8.3 |
8.6 |
8.1 |
8.0 |
8.0 |
1.9 |
1.9 |
2.0 |
2.5 |
2.5 |
2.5 |
25.6 |
27.7 |
28.5 |
|
|
Max |
32.4 |
32.8 |
31.9 |
9.8 |
10.1 |
9.8 |
9.8 |
10.1 |
9.9 |
8.4 |
8.3 |
8.4 |
5.8 |
3.9 |
3.6 |
8.0 |
10.0 |
9.0 |
28.3 |
30.7 |
30.1 |
|
|
WSR33 |
Avg. |
31.1 |
30.8 |
30.4 |
9.2 |
8.9 |
8.8 |
9.2 |
8.9 |
8.9 |
8.3 |
8.2 |
8.2 |
3.1 |
2.6 |
2.7 |
4.8 |
3.3 |
3.9 |
27.0 |
28.8 |
29.2 |
|
Min. |
29.8 |
28.9 |
28.9 |
8.4 |
8.3 |
8.3 |
8.4 |
8.4 |
8.3 |
8.1 |
8.1 |
8.0 |
2.0 |
1.8 |
2.0 |
2.5 |
2.5 |
2.5 |
25.1 |
27.7 |
28.5 |
|
|
Max |
32.5 |
32.7 |
32.3 |
10.1 |
9.8 |
9.5 |
9.9 |
9.7 |
9.5 |
8.4 |
8.4 |
8.3 |
5.2 |
3.8 |
3.9 |
35.0 |
8.0 |
8.0 |
28.8 |
30.7 |
30.0 |
|
|
WSR36 |
Avg. |
31.3 |
30.8 |
30.4 |
8.9 |
9.1 |
8.9 |
8.9 |
9.1 |
8.9 |
8.2 |
8.2 |
8.2 |
3.1 |
2.5 |
2.8 |
4.3 |
3.3 |
3.6 |
26.9 |
28.8 |
29.1 |
|
Min. |
29.9 |
29.5 |
28.1 |
8.3 |
8.4 |
8.3 |
8.3 |
8.5 |
8.3 |
8.1 |
8.0 |
8.0 |
2.0 |
1.9 |
2.0 |
2.5 |
2.5 |
2.5 |
25.1 |
27.9 |
28.6 |
|
|
Max |
32.7 |
32.5 |
32.4 |
10.0 |
9.5 |
9.6 |
10.0 |
9.6 |
9.5 |
8.3 |
8.4 |
8.4 |
4.8 |
3.4 |
4.1 |
25.0 |
8.0 |
9.0 |
28.0 |
30.2 |
30.3 |
|
|
WSR37 |
Avg. |
31.4 |
31.0 |
30.5 |
8.9 |
8.9 |
8.9 |
8.9 |
8.9 |
8.9 |
8.2 |
8.2 |
8.2 |
3.2 |
2.8 |
2.7 |
3.9 |
3.6 |
3.5 |
27.1 |
28.8 |
29.3 |
|
Min. |
30.4 |
28.9 |
28.2 |
8.3 |
8.4 |
8.4 |
8.3 |
8.4 |
8.4 |
8.1 |
8.0 |
8.0 |
1.9 |
2.1 |
2.1 |
2.5 |
2.5 |
2.5 |
25.6 |
27.8 |
28.3 |
|
|
Max |
33.0 |
32.9 |
31.8 |
9.9 |
9.6 |
9.6 |
9.9 |
9.6 |
9.7 |
8.4 |
8.4 |
8.4 |
5.2 |
3.7 |
3.7 |
7.0 |
9.0 |
8.0 |
28.6 |
30.7 |
30.6 |
|
Table 3.5 Summary of Regular Impact Water Quality Monitoring Results (Mid-Ebb)
|
Location |
Parameter |
|||||||||||||||||||||
|
Salinity (ppt) |
Dissolved Oxygen (mg/L) |
pH |
Turbidity (NTU) |
Suspended Solids (mg/L) |
Temp. (oC) |
|||||||||||||||||
|
Surface & Middle |
Bottom |
|||||||||||||||||||||
|
Jun |
Jul |
Aug |
Jun |
Jul |
Aug |
Jun |
Jul |
Aug |
Jun |
Jul |
Aug |
Jun |
Jul |
Aug |
Jun |
Jul |
Aug |
Jun |
Jul |
Aug |
||
|
CE |
Avg. |
31.3 |
30.7 |
30.8 |
8.9 |
9.1 |
8.9 |
8.9 |
9.1 |
8.9 |
8.2 |
8.2 |
8.2 |
4.4 |
3.8 |
3.8 |
3.7 |
3.8 |
5.4 |
27.0 |
28.8 |
29.2 |
|
Min. |
29.6 |
29.3 |
29.0 |
8.1 |
8.6 |
8.3 |
8.0 |
8.6 |
8.3 |
8.0 |
8.0 |
8.0 |
3.1 |
2.3 |
3.2 |
2.5 |
2.5 |
2.5 |
25.2 |
27.5 |
28.3 |
|
|
Max |
33.1 |
32.4 |
32.8 |
9.9 |
10.0 |
9.8 |
9.8 |
10.1 |
9.7 |
8.4 |
8.4 |
8.4 |
6.5 |
5.6 |
5.0 |
10.0 |
16.0 |
14.0 |
29.1 |
30.3 |
30.4 |
|
|
CF |
Avg. |
31.5 |
30.7 |
30.6 |
9.0 |
9.0 |
8.7 |
9.0 |
9.0 |
8.7 |
8.2 |
8.2 |
8.2 |
3.7 |
3.2 |
3.3 |
3.8 |
3.4 |
5.3 |
27.0 |
28.9 |
29.2 |
|
Min. |
30.3 |
29.4 |
28.0 |
8.2 |
8.4 |
8.1 |
8.3 |
8.5 |
8.1 |
8.0 |
8.1 |
8.0 |
2.5 |
2.0 |
2.6 |
2.5 |
2.5 |
2.5 |
25.4 |
27.8 |
28.2 |
|
|
Max |
33.0 |
32.7 |
31.8 |
9.8 |
10.1 |
9.5 |
9.8 |
10.0 |
9.4 |
8.4 |
8.4 |
8.4 |
5.9 |
4.7 |
4.4 |
7.0 |
9.0 |
14.0 |
29.0 |
30.4 |
30.2 |
|
|
WSR1 |
Avg. |
31.4 |
30.8 |
30.6 |
8.7 |
8.9 |
8.8 |
8.7 |
9.0 |
8.9 |
8.2 |
8.2 |
8.2 |
3.1 |
2.6 |
2.6 |
3.9 |
3.4 |
5.1 |
27.0 |
28.8 |
29.2 |
|
Min. |
29.8 |
29.1 |
28.2 |
8.1 |
8.3 |
8.1 |
8.1 |
8.5 |
8.1 |
8.1 |
8.0 |
8.0 |
2.0 |
1.9 |
2.0 |
2.5 |
2.5 |
2.5 |
25.8 |
27.7 |
28.2 |
|
|
Max |
32.6 |
32.4 |
32.1 |
9.7 |
10.0 |
9.7 |
9.6 |
10.1 |
9.7 |
8.5 |
8.4 |
8.4 |
5.1 |
3.7 |
3.6 |
14.0 |
9.0 |
16.0 |
28.6 |
30.3 |
30.1 |
|
|
WSR2 |
Avg. |
31.2 |
30.9 |
30.6 |
8.9 |
8.9 |
8.8 |
9.0 |
8.9 |
8.8 |
8.2 |
8.3 |
8.2 |
2.5 |
2.3 |
2.3 |
3.5 |
3.3 |
5.4 |
27.0 |
28.8 |
29.2 |
|
Min. |
29.6 |
29.5 |
29.2 |
8.2 |
8.2 |
8.1 |
8.2 |
8.2 |
8.0 |
8.1 |
8.0 |
8.0 |
1.8 |
1.5 |
1.8 |
2.5 |
2.5 |
2.5 |
25.8 |
27.9 |
28.3 |
|
|
Max |
32.9 |
32.1 |
32.2 |
10.2 |
9.9 |
9.5 |
10.1 |
9.6 |
9.4 |
8.4 |
8.4 |
8.4 |
4.8 |
3.6 |
3.9 |
7.0 |
7.0 |
18.0 |
28.6 |
30.4 |
30.3 |
|
|
WSR3 |
Avg. |
31.3 |
30.8 |
30.5 |
8.9 |
8.9 |
8.7 |
8.9 |
8.9 |
8.7 |
8.2 |
8.2 |
8.2 |
3.2 |
2.7 |
2.6 |
3.8 |
3.1 |
5.3 |
27.0 |
28.8 |
29.2 |
|
Min. |
30.3 |
29.6 |
29.2 |
8.0 |
8.1 |
8.1 |
8.0 |
8.3 |
8.1 |
8.1 |
8.1 |
7.9 |
2.0 |
2.0 |
2.0 |
2.5 |
2.5 |
2.5 |
25.2 |
28.0 |
28.2 |
|
|
Max |
32.3 |
32.1 |
31.7 |
9.7 |
9.5 |
9.1 |
9.6 |
9.6 |
9.1 |
8.3 |
8.4 |
8.4 |
4.6 |
3.7 |
3.7 |
18.0 |
7.0 |
15.0 |
28.8 |
30.4 |
30.3 |
|
|
WSR4 |
Avg. |
31.5 |
30.8 |
30.6 |
8.8 |
9.0 |
8.9 |
8.8 |
9.0 |
8.9 |
8.2 |
8.2 |
8.2 |
3.1 |
2.8 |
2.6 |
4.2 |
3.3 |
5.6 |
27.0 |
28.8 |
29.2 |
|
Min. |
30.3 |
29.7 |
29.2 |
8.1 |
8.3 |
8.3 |
8.2 |
8.6 |
8.3 |
8.0 |
8.1 |
8.0 |
2.0 |
2.0 |
2.0 |
2.5 |
2.5 |
2.5 |
25.8 |
27.9 |
28.3 |
|
|
Max |
32.9 |
32.3 |
32.0 |
9.5 |
9.4 |
9.7 |
9.5 |
9.4 |
9.8 |
8.4 |
8.4 |
8.4 |
5.2 |
4.0 |
3.8 |
18.0 |
7.0 |
19.0 |
29.1 |
30.2 |
30.7 |
|
|
WSR16 |
Avg. |
31.3 |
30.9 |
30.6 |
9.0 |
9.0 |
9.0 |
9.0 |
9.0 |
9.0 |
8.2 |
8.2 |
8.2 |
3.2 |
2.6 |
2.7 |
4.0 |
3.3 |
4.7 |
26.9 |
28.9 |
29.1 |
|
Min. |
30.2 |
29.5 |
29.0 |
8.2 |
8.3 |
8.3 |
8.3 |
8.3 |
8.4 |
8.0 |
8.0 |
8.0 |
1.9 |
1.6 |
2.0 |
2.5 |
2.5 |
2.5 |
25.7 |
28.1 |
28.3 |
|
|
Max |
32.6 |
32.7 |
32.5 |
9.7 |
9.7 |
9.7 |
9.6 |
9.4 |
9.6 |
8.4 |
8.4 |
8.3 |
5.1 |
4.3 |
4.0 |
16.0 |
7.0 |
14.0 |
28.7 |
30.7 |
30.7 |
|
|
WSR33 |
Avg. |
31.3 |
30.7 |
30.5 |
9.1 |
8.9 |
8.7 |
9.1 |
9.0 |
8.7 |
8.2 |
8.2 |
8.2 |
3.0 |
2.7 |
2.7 |
3.9 |
3.8 |
4.2 |
27.0 |
28.7 |
29.3 |
|
Min. |
30.1 |
29.4 |
28.9 |
8.1 |
8.4 |
8.1 |
8.1 |
8.5 |
8.1 |
8.1 |
8.1 |
7.9 |
2.0 |
1.8 |
2.0 |
2.5 |
2.5 |
2.5 |
25.9 |
28.0 |
28.2 |
|
|
Max |
32.4 |
32.0 |
32.4 |
10.1 |
9.5 |
9.6 |
10.1 |
9.5 |
9.5 |
8.4 |
8.4 |
8.4 |
5.1 |
4.3 |
3.6 |
13.0 |
11.0 |
13.0 |
28.9 |
30.2 |
30.6 |
|
|
WSR36 |
Avg. |
31.3 |
30.7 |
30.6 |
8.9 |
8.9 |
8.8 |
8.8 |
9.0 |
8.7 |
8.2 |
8.2 |
8.2 |
3.3 |
2.6 |
2.6 |
3.9 |
3.4 |
4.2 |
27.0 |
28.9 |
29.0 |
|
Min. |
29.4 |
28.9 |
28.9 |
8.1 |
8.1 |
8.2 |
8.1 |
8.2 |
8.2 |
8.1 |
8.1 |
8.1 |
2.0 |
2.0 |
2.0 |
2.5 |
2.5 |
2.5 |
25.9 |
27.7 |
28.2 |
|
|
Max |
32.8 |
31.9 |
31.8 |
9.9 |
9.8 |
9.7 |
9.9 |
10.0 |
9.7 |
8.4 |
8.4 |
8.4 |
4.9 |
3.8 |
4.0 |
17.0 |
10.0 |
12.0 |
28.7 |
30.3 |
30.2 |
|
|
WSR37 |
Avg. |
31.4 |
30.7 |
30.5 |
8.8 |
9.1 |
8.6 |
8.8 |
9.1 |
8.6 |
8.2 |
8.2 |
8.2 |
3.2 |
2.5 |
2.6 |
3.7 |
3.5 |
4.8 |
26.9 |
28.9 |
29.3 |
|
Min. |
30.0 |
29.4 |
28.1 |
8.2 |
8.2 |
8.2 |
8.2 |
8.3 |
8.2 |
8.1 |
8.1 |
8.0 |
2.1 |
1.9 |
1.9 |
2.5 |
2.5 |
2.5 |
25.9 |
27.5 |
28.0 |
|
|
Max |
32.6 |
32.5 |
32.2 |
9.8 |
10.3 |
9.6 |
9.8 |
10.2 |
9.6 |
8.3 |
8.4 |
8.4 |
4.9 |
3.8 |
3.5 |
7.0 |
9.0 |
14.0 |
29.0 |
30.6 |
30.6 |
|
WasteThe waste generated from this Project includes inert construction and demolition (C&D) materials, and non-inert C&D materials. Non-inert C&D materials are made up of general refuse, vegetative wastes, and recyclable wastes such as plastics and paper/cardboard packaging waste. Steel materials generated from the project are 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 period
are
summarized in Table 4.1.
Details
of
cumulative waste management
data
are
presented as a
waste
flow
table
in Appendix G.
|
Reporting Months |
Actual Quantities of Inert C&D Materials Generated Monthly |
Actual Quantities of C&D Wastes Generated Monthly |
|||||||||
|
Total Quantity Generated |
Hard Rock and Large Broken Concrete |
Reused in the Contract |
Reused in other Projects |
Disposed as Public Fill |
Imported Fill |
Metals |
Paper / cardboard packaging |
Plastics (1) |
Chemical Waste |
Others, e.g. general refuse |
|
|
(in ,000kg) |
(in ,000kg) |
(in ,000kg) |
(in ,000kg) |
(in ,000kg) |
(in ,000kg) |
(in ,000kg) |
(in ,000kg) |
(in ,000kg) |
(in ,000kg) |
(in ,000kg) |
|
|
June 2022 |
80.960 |
0.000 |
0.000 |
0.000 |
80.960 |
0.000 |
0.000 |
0.124 |
0.004 |
0.000 |
271.000 |
|
July 2022 |
2794.730 |
0.000 |
0.000 |
0.000 |
2794.730 |
0.000 |
0.000 |
0.000 |
0.000 |
0.000 |
252.740 |
|
August 2022 |
10429.730 |
0.000 |
0.000 |
0.000 |
10429.730 |
0.000 |
0.000 |
0.170 |
0.090 |
0.000 |
240.470 |
Notes: (1)
Plastics
refer
to
plastic
bottles
/
containers,
plastic
sheets
/
foam
from
packaging
material
Landfill Gas MonitoringIn accordance with Section 11 of the EM&A Manual, monitoring of landfill gas is required for construction works within the 250m Consultation Zone. Part of the desalination plant and the indicative area of natural slope mitigation works fall within the SENT Landfill Extension Consultation Zone; and part of the 1,200 mm diameter fresh water mains along Wan Po Road falls within the SENT Landfill and SENT Landfill Extension Consultation Zones, TKO Stage II/III Restored Landfill and TKO Stage I Restored Landfill Consultation Zones.
Monitoring of oxygen, methane, carbon dioxide and barometric pressure was performed for excavations at 1m depth or more within the consultation Zone.
During construction of works within the consultation zones, excavations of 1m depth or more was monitored:
- At the ground surface before excavation commences;
- 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.
For excavations between 300mm and 1m deep, measurements should be carried out:
- Directly after the excavation has been completed; and
- Periodically whilst the excavation remains open.
LFG monitoring was carried out to identify any migration between the landfill and the Project and to ensure the safety of the construction, operation and maintenance personnel working on- site, visitors and any other person within the Project area.
The following parameters were monitored:
- Methane.
- Oxygen.
- Carbon Dioxide.
- Barometric Pressure.
The area required to be monitored for landfill gas in the reporting period is shown in Figure 5.1.
Figure 5.1 Overview of the SENT Extension Consultation Zone and the Project Site Area
Action and Limit Level are provided in Table 5.1.
Table 5.1 Action and Limit Level for Landfill Gas Monitoring
|
Parameters |
Action Level |
Limit Level |
|
Oxygen (O2) |
<19% O2 |
<19% O2 |
|
Methane (CH4) |
>10% LEL |
>20% LEL |
|
Carbon Dioxide (CO2) |
>0.5% CO2 |
>1.5% CO2 |
The monitoring equipment used in the reporting period could be referring to Section 5.10 - 5.11 of the Monthly EM&A Report.
In this reporting period, 104 times of landfill gas monitoring were recorded at Wan Po Road (Ch1+513 - Ch1+625). No exceedance of action and limit levels for methane, oxygen and carbon dioxide was observed. Monitoring was conducted during excavations at 1m depth or more within the consultation zone and whenever workers entered the excavation on the day.
Summary of Exceedance, Complaint, Notification of Summons and
ProsecutionsThe Environmental
Complaint Handling Procedure
is
shown
in
below
Figure 6.1:
No noise monitoring was conducted during the reporting period since there are no Contract- related construction activities undertaken within a radius of 300m from the monitoring locations. No Action Level exceedance was recorded during the reporting period.
The EM&A works for water quality were conducted during the reporting period in accordance with the EM&A Manual.
During the reporting period, Forty -four (44) of the general water quality monitoring results of SS obtained had exceeded the Action Level. Twenty-five (25) of the general water quality monitoring results of SS obtained during the reporting quarter had exceeded the Limit Level.
After investigation, all exceedances were considered non-project related.
As commented by EPD on the determination of action and limit level exceedance for water quality monitoring, the monitoring result is considered as exceedance if it exceeds either the 95%-ile of baseline data or 20% exceedance of value at any impact station compared with corresponding data from control station.
In view of that all water quality monitoring result from March 2021 to August 2022 were reviewed using the above-mentioned determination method to reassess the number of action and limit level exceedances since the commencement of water quality monitoring.
Total one thousand one hundred and sixty-nine (1169) action level exceedances and five hundred and sixty-two (562) limit level exceedances for turbidity were recorded during mid flood tide since the commencement of the water quality monitoring and one thousand two hundred and thirty-seven (1237) action level exceedances, and six hundred and five (605) limit level exceedances for turbidity were recorded during mid ebb tide since the commencement of the water quality monitoring. Whenever a data exceedance occurred, remeasurement at the same monitoring location was immediately conducted. Fortunately, no average turbidity data exceedances have ever been identified after such remeasurement.
Total six hundred and ninety-seven (697) action level exceedances and five hundred and sixteen
(516) limit level exceedances for suspended solids were recorded during mid flood tide since the commencement of the water quality monitoring and eight hundred and sixteen (816) action level exceedances and six hundred and ten (610) limit level exceedances for suspended solids were recorded during mid ebb tide since the commencement of the water quality monitoring.
In this reporting period, 104 times of landfill gas monitoring were recorded at Wan Po Road (Ch1+513 - Ch1+625). No exceedance of action and limit levels for methane, oxygen and carbon dioxide was observed. Monitoring was conducted during excavations at 1m depth or more within the consultation zone and whenever workers entered the excavation on the day.
Algal Bloom, red tide and silty plume were observed at the marine water near CEDD pier, Outfall Shaft and Intake Shaft on 21 July 2022, 1 and 26 August 2022 by the Contractor. Detail could be referring to Section 3.5.
ET will keep closely monitoring the performance of Contractor, implementation of water quality mitigation measure and other contamination issue around the Project site, to ensure the EM&A requirement is properly implemented.
One environmental complaint was received from EPD on 22 July 2022 in the reporting period, detail of the complaint could be referred to Appendix J of the Monthly EM&A Report.
No notification of summons and prosecution was received in the reporting period. Statistics on complaints and regulatory compliance are summarized in Appendix H.
EM&A Site InspectionSite inspections were carried out on a weekly basis to monitor the implementation of proper environmental pollution control and mitigation measures under the Contract.
Joint site inspections were also carried out by ET and IEC on 7, 14, 21, 28 June 2022, 5, 12, 19, 29 July 2022 and 2, 9, 16, 23, 31 August 2022.
Minor deficiencies were observed during weekly site inspection. Key observations during the site inspections are summarized below:
- General refuse, food package and plastic bottle were found around the site OSCG Bldg, the Contractors are reminded to clean up immediately.
- Chemical tanks were found placed near the RO Building without drip tray or proper storage. The contractors are reminded to store the chemicals tanks properly.
- There are two oil tanks found near the Administration Building without proper storage or drip tray. The Contractor is reminded to provide a proper storage asap.
- Chemical containers found near the chemical Building shall be placed / stored on a drip tray to avid oil leakage or spillage.
- General refuse (lunch box) should be disposed of properly at a proper waste storage point (Product Water Storage Tank)
The Contractor has rectified the observations identified during environmental site inspections in the reporting period.
According to the EIA Study Report, Environmental Permit, contract documents and EM&A Manual, the mitigation measures detailed in the documents should be implemented as much as practical during the reporting period. An updated Implementation Status of Environmental Mitigation Measures (EMIS) is provided in Appendix C.
Conclusions and RecommendationsThis is the 10th Quarterly EM&A Report for the Project which summarizes the key findings of the EM&A programme during the reporting period from 1 June to 31 August 2022, in accordance with the EM&A Manual and the requirement under FEP-01/503/2015/A.
No noise monitoring was conducted in the reporting period due to the over distant monitoring station from the works location.
During the reporting period, forty -four (44) of the general water quality monitoring results of SS obtained had exceeded the Action Level. Twenty-five (25) of the general water quality monitoring results of SS obtained during the reporting quarter had exceeded the Limit Level.
After investigation, all exceedances were considered non-project related.
In this reporting period, 104 times of landfill gas monitoring were recorded at Wan Po Road (Ch1+513 - Ch1+625). No exceedance of action and limit levels for methane, oxygen and carbon dioxide was observed. Monitoring was conducted during excavations at 1m depth or more within the consultation zone and whenever workers entered the excavation on the day.
As commented by EPD on the determination of action and limit level exceedance for water quality monitoring, the monitoring result is considered as exceedance if it exceeds either the 95%-ile of baseline data or 20% exceedance of value at any impact station compared with corresponding data from control station.
In view of that all water quality monitoring result from March 2021 to August 2022 were reviewed using the above-mentioned determination method to reassess the number of action and limit level exceedances since the commencement of water quality monitoring.
Total one thousand one hundred and sixty-nine (1169) action level exceedances and five hundred and sixty-two (562) limit level exceedances for turbidity were recorded during mid flood tide since the commencement of the water quality monitoring and one thousand two hundred and thirty-seven (1237) action level exceedances, and six hundred and five (605) limit level exceedances for turbidity were recorded during mid ebb tide since the commencement of the water quality monitoring. Whenever a data exceedance occurred, remeasurement at the same monitoring location was immediately conducted. Fortunately, no average turbidity data exceedances have ever been identified after such remeasurement.
Total six hundred and ninety-seven (697) action level exceedances and five hundred and sixteen (516) limit level exceedances for suspended solids were recorded during mid flood tide since the commencement of the water quality monitoring and eight hundred and sixteen (816) action level exceedances and six hundred and ten (610) limit level exceedances for suspended solids were recorded during mid ebb tide since the commencement of the water quality monitoring.
Algal Bloom, red tide and silty plume were observed at the marine water near CEDD pier, Outfall Shaft and Intake Shaft on 21 July 2022, 1 and 26 August 2022 by the Contractor. No evidence
shown that the silty plume was caused / related to the Project. Detail could be referring to Section 3.5.
Weekly environmental site inspection was conducted during the reporting period. Minor deficiency was observed during site inspection and was rectified. The environmental performance of the project was therefore considered satisfactory.
According to the environmental site inspections performed in the reporting period, the Contractor is reminded to pay attention on maintaining proper materials storage.
One environmental complaint was received from EPD on 22 July 2022 in the reporting period, detail of the complaint could be referred to Appendix J of the Monthly EM&A Report.
No notification of summons or prosecution was received since commencement of the Contract.
The ET will keep track on the construction works to confirm compliance of environmental requirements and the proper implementation of all necessary mitigation measures.
Appendix
A
Master
Programme
Appendix
B
Overview of Desalination Plant in Tseung Kwan O
Appendix
C
Summary of Implementation Status of Environmental Mitigation
|
EIA Reference |
Recommended Environmental Protection Measures/ Mitigation Measures |
Objectives of the recommended measures & main concerns to address |
Implementation Agent |
Implementation Stage |
Implementation status |
Relevant Legislation & Guidelines |
||
|
D |
C |
O |
||||||
|
Air Quality |
|
|||||||
|
S4.8.1 |
Impervious dust screen or sheeting will be provided to enclose scaffolding from the ground floor level of building for construction of superstructure of the new buildings. |
Land site/ During Construction |
Contractor(s) |
|
ü |
|
Implemented |
Air Pollution Control (Construction Dust) |
|
S4.8.1 |
Impervious sheet will be provided for skip hoist for material transport. |
Land site/ During Construction |
Contractor(s) |
|
ü |
|
NA |
- |
|
S4.8.1 |
The area where dusty work takes place should be sprayed with water or a dust suppression chemical immediately prior to, during and immediately after dusty activities as far as practicable. |
Land site/ During Construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S4.8.1 |
All dusty materials should be sprayed with water or a dust suppression chemical immediately prior to any loading, unloading or transfer operation. |
Land site/ During Construction |
Contractor(s) |
|
ü |
|
Implemented, reminder issued |
- |
|
S4.8.1 |
Dropping heights for excavated materials should be controlled to a practical height to minimize the fugitive dust arising from unloading. |
Land site/ During Construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S4.8.1 |
During transportation by truck, materials should not be loaded to a level higher than the side and tail boards and should be dampened or covered before transport. |
Land site/ During Construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S4.8.1 |
Wheel washing device should be provided at the exits of the work sites. Immediately before leaving a construction site, every vehicle shall be washed to remove any dusty material from its body and wheels as far as practicable. |
Land site/ During Construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S4.8.1 |
Road sections between vehicle-wash areas and vehicular entrance will be paved. |
Land site/ During Construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S4.8.1 |
Hoarding of not less than 2.4m high from ground level will be provided along the length of the Project Site boundary. |
Land site/ During construction |
Contractor(s) |
ü |
ü |
|
N/A |
- |
|
S4.8.1 |
Haul roads will be kept clear of dusty materials and will be sprayed with water so as to maintain the entire road surface wet at all times. |
Land site/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S4.8.1 |
Temporary stockpiles of dusty materials will be either covered entirely by impervious sheets or sprayed with water to maintain the entire surface wet all the time. |
Land site/ During construction |
Contractor(s) |
|
ü |
|
Implemented, reminder issued |
- |
|
EIA Reference |
Recommended Environmental Protection Measures/ Mitigation Measures |
Objectives of the recommended measures & main concerns to address |
Implementation Agent |
Implementation Stage |
Implementation status |
Relevant Legislation & Guidelines |
||
|
D |
C |
O |
||||||
|
S4.8.1 |
Stockpiles of more than 20 bags of cement, dry pulverized fuel ash and dusty construction materials will be covered entirely by impervious sheeting sheltered on top and 3-sides. |
Land site/ During construction |
Contractor(s) |
|
ü |
|
N/A |
- |
|
S4.8.1 |
All exposed areas will be kept wet always to minimize dust emission. |
Land site/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S4.8.1 |
Ultra-low-Sulphur diesel (ULSD) will be used for all construction plant on-site, as defined as diesel fuel containing not more than 0.005% Sulphur by weight) as stipulated in Environment, Transport and Works Bureau Technical Circular (ETWB-TC(W)) No 19/2005 on Environmental Management on Construction Sites. |
Land site/ During construction/ During Operation |
Contractor(s) |
|
ü |
ü |
Implemented |
Environment, Transport and Works Bureau Technical Circular (ETWB- TC(W)) No 19/2005 on Environmental Management on Construction Sites |
|
S4.8.1 |
The engine of the construction equipment during idling will be switched off. |
Land site/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S4.8.1 |
Concrete batching plant will be required on site. control measures recommended in the Guidance Note on a Best Practicable Means for Cement Works (Concrete Batching Plant) (BPM 3/2 (93)) will be implemented. The control measures recommended in the Guidance Note on a Best Practicable Means for Cement Works (Concrete Batching Plant) (BPM 3/2 (93)) will be implemented. |
Land site/ During construction |
Contractor(s) |
|
ü |
|
N/A |
- |
|
S4.8.1 |
Regular maintenance of construction equipment deployed on-site will be conducted to prevent black smoke emission. |
Land site/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S4.10 |
To ensure proper implementation of the recommended dust mitigation measures and good construction site practices during the construction phase, environmental site audits on weekly basis is recommended throughout the construction period. |
Land site/ During construction |
Contractor(s)/ Environmental Team (ET) & Independent Environmental Checker (IEC) |
|
ü |
|
Implemented |
- |
Note: D - Design stage C - Construction O - Operation
|
EIA Reference |
Recommended Environmental Protection Measures/ Mitigation Measures |
Objectives of the recommended measures & main concerns to address |
Implementation Agent |
Implementation Stage |
Implementation status |
Relevant Legislation & Guidelines |
||
|
D |
C |
O |
||||||
|
Noise |
||||||||
|
S5.7 |
Only well-maintained plant will be operated on-site and plant will be serviced regularly during the construction phase. |
All area/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
A Practical Guide for the Reduction of Noise from Construction Works A Practical Guide for the Reduction of Noise from Construction Works |
|
S5.7 |
Silencers or mufflers on construction equipment will be utilized and will be properly maintained during the construction phase. |
Noise control/ During construction |
Contractor(s) |
|
ü |
|
N/A |
|
|
S5.7 |
Mobile plant, if any, will be sited as far away from NSRs as possible. |
Noise control/ During construction |
Contractor(s) |
|
ü |
|
N/A |
|
|
S5.7 |
Machines and plant (such as trucks) that may be in intermittent use will be shut down between work periods or will be throttled down to a minimum. |
Noise control/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
|
|
S5.7 |
Plants known to emit noise strongly in one direction will, wherever possible, be orientated so that the noise is directed away from the nearby NSRs. |
Noise control/ During construction |
Contractor(s) |
|
ü |
|
N/A |
|
|
S5.7 |
Material stockpiles and other structures will be effectively utilized, wherever practicable, in screening noise from on-site construction activities. |
Noise control/ During construction |
Contractor(s) |
|
ü |
|
N/A |
|
|
S5.7 |
Use of Quite Powered Mechanical Equipment (QPME). |
Noise control/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
|
|
S5.7 |
Movable noise barriers of 3m in height with skid footing should be used and located within a few meters of stationary plant and mobile plant such that the line of sight to the NSR is blocked by the barriers. The length of the barrier should be at least five times greater than its height. The noise barrier material should have a superficial surface density of at least 7 kg m-2 and have no o or gappeningss. |
Noise control/ During construction |
Contractor(s) |
|
ü |
|
N/A |
|
|
S5.7 |
The noise insulating sheet should be deployed such that there would be no opening or gaps on the joints. |
Noise control/ During construction |
Contractor(s) |
|
ü |
|
N/A |
|
|
S5.7 |
Construction activities (e.g. excavation/shoring, reinstatement (asphalt), and pipe jacking) will be planned and carried out in sequence, such that items of PME proposed for these activities will not be operated simultaneously. |
Noise control/ During construction |
Contractor(s) |
ü |
ü |
|
Implemented |
|
|
S5.7 |
PMEs will not be used at the works areas near educational institutions with residual impact (ie the “influence area” within a radius of 40m) during school hours in order to reduce impact to the educational institutions. |
Noise control / During construction |
Contractor(s) |
|
ü |
|
N/A |
|
|
EIA Reference |
Recommended Environmental Protection Measures/ Mitigation Measures |
Objectives of the recommended measures & main concerns to address |
Implementation Agent |
Implementation Stage |
Implementation status |
Relevant Legislation & Guidelines |
||
|
D |
C |
O |
||||||
|
S5.7 |
Noise enclosures or acoustic sheds would be used to cover stationary PME such as generators. Portable/Movable noise enclosure made of material with superficial surface density of at least 7 kg m-2 may be used for screening the noise from operation of the saw/groover, concrete. |
Noise control/ Pre- construction/ During construction |
Contractor(s) |
ü |
ü |
|
N/A |
- |
|
S5.9 |
Sawcutting pavement, breaking up of pavement, excavation /shoring, pipe laying, backfilling, reinstatement (concrete) and pipe jacking shall be scheduled outside the examination period. |
Noise control/ Pre- construction/ During construction |
Contractor(s) |
ü |
ü |
|
N/A |
- |
|
S5.9 |
In view the duration of noise exceedance at Creative Secondary School, PLK Laws Foundation College, TKO Kei Tak Primary School and School of Continuing and Professional Studies-CUHK is limited to 8 weeks, the construction work in the influence areas near the four schools shall be scheduled during long school holidays (eg summer holiday, Easter holiday or Christmas holiday, etc) as far as practicable. Scheduling the construction work for the four schools. |
Noise control/ Pre- construction/ During construction |
Contractor(s) |
ü |
ü |
|
N/A |
- |
|
S5.10 |
A noise monitoring programme shall be implemented for the construction phase. |
Designated monitoring stations as defined in EM&A Manual/During construction phase |
Environmental Team |
|
ü |
|
N/A |
- |
|
S5.10 |
The effectiveness of on-site control measures could also be evaluated through the regular site audits. |
All facilities/ During construction |
Contractor(s)/ ET & Independent Environmental Checker (IEC) |
|
ü |
|
Implemented |
- |
Note: D - Design stage C - Construction O - Operation
|
EIA Reference |
Recommended Environmental Protection Measures/ Mitigation Measures |
Objectives of the recommended measures & main concerns to address |
Implementation Agent |
Implementation Stage |
Implementation status |
Relevant Legislation & Guidelines |
||
|
D |
C |
O |
||||||
|
Water Quality |
||||||||
|
S6.9 |
Dredged marine sediment will be disposed of in a gazetted marine disposal area in accordance with marine dumping permit conditions of the Dumping at Sea Ordinance (DASO). |
Marine Dredging/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
Dumping at Sea Ordinance (DASO) |
|
S6.9 |
Disposal vessels will be fitted with tight bottom seals in order to prevent leakage of material during transport. |
Marine Dredging/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S6.9 |
Barges will be filled to a level, which ensures that material does not spill over during transport to the disposal site and that adequate freeboard is maintained to ensure that the decks are not washed by wave action. |
Marine Dredging/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S6.9 |
After dredging, any excess materials will be cleaned from decks and exposed fittings before the vessel is moved from the dredging area. |
Marine Dredging/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S6.9 |
All vessels should be well maintained and inspected before use to limit any potential discharges to the marine environment. |
Marine Dredging/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S6.9 |
All vessels must have a clean ballast system. |
Marine Dredging/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S6.9 |
No discharge of sewage/grey wastewater should be allowed. Waste water from potentially contaminated area on working vessels should be minimized and collected. These kinds of wastewater should be brought back to port and discharged at appropriate collection and treatment system. |
Marine Dredging/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S6.9 |
No soil waste is allowed to be disposed overboard. |
Marine Dredging/ During construction |
Contractor(s) |
|
ü |
|
N/A |
- |
|
S6.9 |
Silt removal facilities such as silt traps or sedimentation facilities will be provided to remove silt particles from runoff to meet the requirements of the TM standard under the WPCO. The design of silt removal facilities will be based on the guidelines provided in ProPECC PN 1/94. All drainage facilities and erosion and sediment control structures will be inspected on a regular basis and maintained to confirm proper and efficient operation at all times and particularly during rainstorms. Deposited silt and grit will be removed regularly. |
Land site & drainage/ During construction |
Contractor(s) |
|
ü |
|
Implemented, reminder issued |
ProPECC PN 1/94 TM Standard under the WPCO |
|
EIA Reference |
Recommended Environmental Protection Measures/ Mitigation Measures |
Objectives of the recommended measures & main concerns to address |
Implementation Agent |
Implementation Stage |
Implementation status |
Relevant Legislation & Guidelines |
||
|
D |
C |
O |
||||||
|
S6.9 |
Earthworks to form the final surfaces will be followed up with surface protection and drainage works to prevent erosion caused by rainstorms. |
Land site & drainage/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S6.9 |
Appropriate surface drainage will be designed and provided where necessary. |
Land site & drainage/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S6.9 |
The precautions to be taken at any time of year when rainstorms are likely together with the actions to be taken when a rainstorm is imminent or forecasted and actions to be taken during or after rainstorms are summarised in Appendix A2 of ProPECC PN 1/94. |
Land site & drainage/ During construction |
Contractor(s) |
ü |
ü |
|
Implemented |
ProPECC PN 1/94 |
|
S6.9 |
Oil interceptors will be provided in the drainage system where necessary and regularly emptied to prevent the release of oil and grease into the storm water drainage system after accidental spillages. |
Land site & drainage/ During construction |
Contractor(s) |
|
ü |
|
N/A |
- |
|
S6.9 |
Temporary and permanent drainage pipes and culverts provided to facilitate runoff discharge, if any, will be adequately designed for the controlled release of storm flows. |
Land site & drainage/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S6.9 |
The temporary diverted drainage, if any, will be reinstated to the original condition when the construction work has finished or when the temporary diversion is no longer required. |
Land site & drainage/ During construction |
Contractor(s) |
|
ü |
|
N/A |
- |
|
S6.9 |
Appropriate numbers of portable toilets shall be provided by a licensed contractor to serve the construction workers over the construction site to prevent direct disposal of sewage into the water environment. |
Land site & drainage/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S6.9 and S6.12 |
The sterilization water should be dechlorinated with total residual chlorine (TRC) level below 1 mg/L before discharge to public sewer. In situ testing of TRC should also be conducted for the discharge of chlorinated water for pipeline disinfection to ensure sufficient dechlorination before discharge to public sewer. |
Sterilization of water mains prior to commissioning |
Contractor(s) |
|
ü |
ü |
N/A |
Technical Memorandum for Effluents Discharged into Drainage and Sewerage Systems Inland and Coastal Waters |
|
EIA Reference |
Recommended Environmental Protection Measures/ Mitigation Measures |
Objectives of the recommended measures & main concerns to address |
Implementation Agent |
Implementation Stage |
Implementation status |
Relevant Legislation & Guidelines |
||
|
D |
C |
O |
||||||
|
S6.9 |
The cleaning and flushing water should also be treated and desilted to the relevant discharge requirement stipulated in TM- DSS before discharging. |
Sterilization of water mains prior to commissioning |
Contractor(s) |
|
ü |
ü |
N/A |
Technical Memorandum for Effluents Discharged into Drainage and Sewerage Systems Inland and Coastal Waters |
|
S6.9 |
Site drainage should be well maintained, and good construction practices should be observed to ensure that oil, fuels, solvents and other chemicals are managed, stored and handled properly and do not enter the nearby water streams. |
Land site & drainage/ During construction/ During operation |
Contractor(s) |
|
ü |
ü |
Implemented, reminder issued |
- |
|
S6.12 |
Regular site inspections will be carried out in order to confirm that regulatory requirements are being met and that contractors are implementing the standard site practice and mitigation measures as proposed to reduce potential impacts to water quality. |
During construction |
Contractor(s)/ ET & IEC |
|
ü |
|
Implemented, reminder issued |
- |
Note: D - Design stage C - Construction O - Operation
|
EIA Reference |
Recommended Environmental Protection Measures/ Mitigation Measures |
Objectives of the recommended measures & main concerns to address |
Implementation Agent |
Implementation Stage |
Implementation Status |
Relevant Legislation & Guidelines |
||
|
D |
C |
O |
||||||
|
Waste Management |
||||||||
|
S8.5 |
Nomination of approved personnel to be responsible for standard site practices, arrangements for collection and effective disposal to an appropriate facility of all wastes generated at the site. |
Contract mobilization/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S8.5 |
Training of site personnel in proper waste management and chemical handling procedures. Training will be provided to workers on the concepts of site cleanliness and appropriate waste management procedures, including waste reduction, reuse and recycling at the beginning of the construction works. |
Contract mobilization/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S8.5 |
Provision of sufficient waste disposal points and regular collection for disposal. |
All area/ During construction/ During operation |
Contractor(s) |
|
ü |
ü |
Implemented, reminder issued |
DEVB TC(W) No. 8/2010, Enhanced |
|
|
|
|
|
|
|
|
Specification for Site |
|
|
|
|
|
|
|
|
|
Cleanliness and |
|
|
|
|
|
|
|
|
|
Tidiness. |
|
|
S8.5 |
Appropriate measures to reduce windblown litter and dust transportation of waste by either covering trucks or by |
All area/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
DEVB TC(W) No. 8/2010, Enhanced Specification for Site Cleanliness and Tidiness. |
|
|
transporting wastes in enclosed containers. |
|
|
|
|
|||
|
S8.5 |
A waste management plan (WMP) as stated in the “ETWB
TC(W) No. 19/2005, Environmental Management on Construction Sites” |
All area/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
ETWB TC(W) No. 19/2005, Environmental Management on Construction Sites |
|
|
for the amount of waste generated, recycled and disposed of |
|
|
|
|
|||
|
|
(including the disposal sites) will be established and implemented |
|
|
|
|
|||
|
|
during the construction phase as part of the Environmental |
|
|
|
|
|||
|
|
Management Plan (EMP). The Contractor will be required to |
|
|
|
|
|||
|
|
prepare the EMP and submits it to the Architect/ Engineer under |
|
|
|
|
|||
|
|
the Contract for approval prior to implementation. |
|
|
|
|
|||
|
S8.5 |
Separation of chemical wastes for special handling and appropriate treatment at the Chemical Waste Treatment Centre at |
All area/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
Chapters 2 & 3 Code of Practice on the |
|
|
Tsing Yi. |
|
|
|
|
Packaging, Labelling |
||
|
|
|
|
|
|
|
& Storage of Chemical |
||
|
|
|
|
|
|
|
Wastes published |
||
|
|
|
|
|
|
|
under the Waste |
||
|
|
|
|
|
|
|
Disposal Ordinance |
||
|
|
|
|
|
|
|
(Cap 354), |
||
|
|
|
|
|
|
|
Section 35 |
||
|
EIA Reference |
Recommended Environmental Protection Measures/ Mitigation Measures |
Objectives of the recommended measures & main concerns to address |
Implementation Agent |
Implementation Stage |
Implementation Status |
Relevant Legislation & Guidelines |
||
|
D |
C |
O |
||||||
|
S8.5 |
Regular cleaning and maintenance programme for drainage systems, sumps and oil interceptors. |
Land site/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
Waste Disposal Ordinance (Cap 354) |
|
S8.5 |
A recording system for the amount of wastes generated/ recycled and disposal sites. The trip- ticket system will be included as one of the contractual requirements and implemented by the contractor(s). |
Land site/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
DEVB TC(W) No. 6/2010, Trip Ticket System for Disposal of Construction & Demolition Materials |
|
S8.5 |
Segregation and storage of different types of waste in different containers, skips or stockpiles to enhance reuse or recycling of material and their proper disposal. |
Land site/ During construction/ During operation |
Contractor(s) |
|
ü |
|
Implemented |
WBTC 32/92, The Use of Tropical Hard Wood on Construction Site |
|
S8.5 |
Encourage collection of aluminium cans and wastepaper by individual collectors during construction with separate labelled bins provided to segregate these wastes from other general refuse by the workforce. |
Land site/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
ETWB TCW No. 33/2002, Management of Construction and Demolition Material Including Rock |
|
S8.5 |
Any unused chemicals and those with remaining functional capacity will be recycled as far as possible. |
Land site/ During construction |
Contractor(s) |
|
ü |
|
N/A |
- |
|
S8.5 |
Use of reusable non-timber formwork to reduce the amount of C&D materials. |
All areas/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
WBTC 32/92, The Use of Tropical Hard Wood on Construction Site |
|
S8.5 |
Prior to disposal of construction waste, wood, steel and other metals will be separated to the extent practical, for re-use and/or recycling to reduce the quantity of waste to be disposed of to landfill. |
All areas/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
DEVB TC(W) No. 6/2010, Trip Ticket System for Disposal of Construction & Demolition Materials |
|
S8.5 |
Proper storage and site practices to reduce the potential for damage or contamination of construction materials. |
All areas/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S8.5 |
Plan and stock construction materials carefully to reduce amount of waste generated and avoid unnecessary generation of waste. |
All areas/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
EIA Reference |
Recommended Environmental Protection Measures/ Mitigation Measures |
Objectives of the recommended measures & main concerns to address |
Implementation Agent |
Implementation Stage |
Implementation Status |
Relevant Legislation & Guidelines |
||
|
D |
C |
O |
||||||
|
S8.5 |
A Sediment Quality Report (SQR) for sampling and chemical testing of the sediment will be prepared and submitted to the EPD for approval. The approved detailed sampling and chemical testing will be carried out prior to the commencement of the dredging activities to confirm the sediment disposal method. |
Marine works/ During construction |
Contractor(s) |
|
ü |
|
N/A |
ETWB TC(W) No. 34/2002 and Dumping at Sea Ordinance (DASO) |
|
S8.5 |
The management of dredged/ excavated sediment management requirement from ETWB TC(W) No. 34/2002 will be incorporated in the Specification of the Contract Documents. |
Marine works/ During construction |
WSD/ Contractor(s) |
|
ü |
|
Implemented |
ETWB TC(W) No. 34/2002 and Dumping at Sea Ordinance (DASO) |
|
S8.5 |
The contractor will open a billing account with EPD in accordance with the Waste Disposal (Charges for Disposal of Construction Waste) Regulation for the payment of disposal charges. |
Contract mobilization/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
Cap 354N Waste Disposal (Charges for Disposal of Construction Waste) Regulation |
|
S8.5 |
A trip-ticket system will be established in accordance with DEVB TC(W) No. 6/2010 to monitor the reuse of surplus excavated materials off-site and disposal of construction waste and general refuse at transfer facilities/ landfills, and to control fly-tipping. |
Contract mobilization/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
DEVB TC(W) No. 6/2010, Trip Ticket System for Disposal of Construction & Demolition Materials |
|
S8.5 |
The project proponent will also conduct regular inspection of the waste management measures implemented on site as described in the Waste Management Plan. |
All area/ During construction |
Contractor(s)/ Environmental Team (ET) & Independent Environmental Checker (IEC) |
|
ü |
|
Implemented |
ETWB TC(W) No. 19/2005, Environmental Management on Construction Sites |
|
S8.5 |
A recording system (similar to summary table as shown in Annex 5 and Annex 6 of Appendix G of ETWB TC(W) No. 19/2005) for the amount of waste generated, recycled and disposed of (including the disposal sites) will be established during the construction phase. |
All area/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
Annex 5 and Annex 6 of Appendix G of ETWB TC(W) No. 19/2005 |
|
S8.5 |
Inert C&D materials (public fill) will be reused within the Project as far as practicable. |
All area/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S8.5 |
Public fill and construction waste shall be segregated and stored in different containers or skips to facilitate reuse or recycling of materials and their proper disposal. |
All area/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S8.5 |
Specific areas of the work site will be designated for such segregation and storage if immediate use is not practicable. |
All area/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
EIA Reference |
Recommended Environmental Protection Measures/ Mitigation Measures |
Objectives of the recommended measures & main concerns to address |
Implementation Agent |
Implementation Stage |
Implementation Status |
Relevant Legislation & Guidelines |
||
|
D |
C |
O |
||||||
|
S8.5 |
To reduce the potential dust and water quality impacts of site formation works, C&D materials will be wetted as quickly as possible to the extent practice after filling. |
All area/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
Air Pollution Control (Construction Dust) Regulation (Cap 311R); WPCO (Cap 358) |
|
S8.5 |
Open stockpiles of excavated/ fill materials or construction wastes on-site should be covered with tarpaulin or similar fabric. |
Land site/ During Construction, particularly dry season |
Contractor(s) |
|
ü |
|
Implemented |
Air Pollution Control (Construction Dust) Regulation (Cap 311R) |
|
S8.5 |
Chemical waste container shall be suitable for the substance they are holding, resistant to corrosion, maintained in a good condition, and securely closed. |
All area/ During construction/ During operation |
Contractor(s)/ WSD |
|
ü |
ü |
Implemented |
Waste Disposal (Chemical Waste) (General) Regulation; Code of Practice on the Packaging, Handling and Storage of Chemical Wastes |
|
S8.5 |
Chemical waste container shall have a capacity of less than 450 L unless the specifications have been approved by the EPD. |
All area/ During construction/ During operation |
Contractor(s)/ WSD |
|
ü |
ü |
Implemented |
|
|
S8.5 |
A label in English and Chinese shall be displayed on the chemical container in accordance with instructions prescribed in Schedule 2 of the Regulations. |
All area/ During construction/ During operation |
Contractor(s)/ WSD |
|
ü |
ü |
Implemented |
|
|
S8.5 |
Storage areas for chemical waste shall be enclosed on at least 3 sides. |
All area/ During construction/ During operation |
Contractor(s)/ WSD |
|
ü |
ü |
Implemented |
|
|
S8.5 |
Storage areas for chemical waste shall have an impermeable floor and bunding, of capacity to accommodate 110% of the volume of the largest container or 20% by volume of the chemical waste stored in that area, whichever is the greatest. |
All area/ During construction/ During operation |
Contractor(s)/ WSD |
|
ü |
ü |
Implemented |
|
|
S8.5 |
Storage areas for chemical waste shall have adequate ventilation. |
All area/ During construction/ During operation |
Contractor(s)/ WSD |
|
ü |
ü |
Implemented |
|
|
S8.5 |
Storage areas for chemical waste shall be covered to prevent rainfall entering (water collected within the bund must be tested and disposed of as chemical waste, if necessary). |
All area/ During construction/ During operation |
Contractor(s)/ WSD |
|
ü |
ü |
Implemented |
|
|
S8.5 |
Storage areas for chemical waste shall be arranged so that incompatible materials are appropriately separated. |
All area/ During construction/ During operation |
Contractor(s)/ WSD |
|
ü |
ü |
Implemented |
|
|
S8.5 |
General refuse will be stored in enclosed bins or compaction units separately from construction and chemical wastes. |
All area/ During construction/ During operation |
Contractor(s)/ WSD |
|
ü |
ü |
Implemented, reminder and observation issued |
|
|
EIA Reference |
Recommended Environmental Protection Measures/ Mitigation Measures |
Objectives of the recommended measures & main concerns to address |
Implementation Agent |
Implementation Stage |
Implementation Status |
Relevant Legislation & Guidelines |
||
|
D |
C |
O |
||||||
|
S8.5 |
Adequate number of waste containers will be provided to avoid over-spillage of waste. |
All area/ During construction/ During operation |
Contractor(s)/ WSD |
|
ü |
ü |
Implemented |
DEVB TC(W) No. 8/2010 Enhanced Specification for Site Cleanliness and Tidiness. |
|
S8.5 |
A reputable waste collector will be employed by the Contractor to remove general refuse from the site, separately from construction and chemical wastes, on a daily basis to minimise odour, pest and litter impacts. |
All area/ During construction/ During operation |
Contractor(s)/ WSD |
|
ü |
ü |
Implemented |
- |
|
S8.5 |
Recycling bins will be provided at strategic locations within the Site to facilitate recovery of recyclable materials (including aluminum can, waste paper, glass bottles and plastic bottles) from the Site. Materials recovered will be sold for recycling. |
All area/ During construction/ During operation |
Contractor(s)/ WSD |
|
ü |
ü |
Implemented |
- |
|
S8.5 |
To avoid any odour and litter impact, accurate number of portable toilets will be provided for workers on-site. |
All area/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S8.5 |
The burning of refuse on construction sites is prohibited by law. |
All area/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
Air Pollution Control Ordinance (Cap 311) |
|
S8.7 |
To facilitate monitoring and control over the contractors’ performance on waste management, a waste inspection and audit programme will be implemented throughout the construction phase. |
All facilities/ During construction |
ET/ IEC |
|
ü |
|
Implemented |
- |
Note: D - Design stage C - Construction O - Operation
|
EIA Reference |
Recommended Environmental Protection Measures/ Mitigation Measures |
Objectives of the recommended measures & main concerns to address |
Implementation Agent |
Implementation Stage |
Implementation Status |
Relevant Legislation & Guidelines |
||
|
D |
C |
O |
||||||
|
Ecology |
||||||||
|
S9.7 |
For slope mitigation works within the Clear Water Bay Country Park, to avoid tree felling and damages to trees, the exact locations of the flexible barrier foundation plates, soil nails and rock dowels can be adjusted during detailed design, and a setback distance from existing trees is recommended to be maintained as far as practical. A detailed specification describing the exact locations of the flexible barrier foundation plates, soil nails and rock dowels will be prepared to illustrate how the setback distance from existing trees would be implemented for tree avoidance. |
Slope mitigation works area/ During detailed design/ During construction |
Contractor(s) |
ü |
ü |
|
N/A |
- |
|
S9.7 |
Pruning of tree canopies along the alignment of the flexible barriers shall be limited to a minimum. |
Slope mitigation works area/ During construction |
Contractor(s) |
|
ü |
|
N/A |
|
|
S9.7 |
The alignment of flexible barriers shall be optimized to preserve all species of conservation interest and minimize the impact to the existing vegetation as far as practicable. All individuals of Marsdenia lachnostoma within the slope mitigation areas shall be retained in- situ, by positioning the alignment of flexible barrier at a minimum 1.5m in a radius away from these individuals. |
Slope mitigation works area/ During detailed design/ During construction |
Contractor(s) |
ü |
ü |
|
N/A |
- |
|
S9.7 and 9.10 |
At the detailed design stage prior to the commencement of the slope mitigation works, a vegetation survey shall be carried out at the slope mitigation areas within the Clear Water Bay Country Park to assess the condition and identify the location of each individual of Marsdenia lachnostoma and other flora species of conservation interest that may be directly affected by the construction works. |
Slope mitigation works area/ During detailed design/ During construction |
Contractor(s) |
ü |
|
|
Implemented |
- |
|
S9.7 |
Temporary fencing will be installed to fence off the concerned species either in groups of individually within the works area and in the close proximity to prevent from being damaged and disturbed during construction. A sign identifying the site shall be attached to the fence and flagging tape shall be attached to the individuals to visualize their locations. |
Slope mitigation works area/ During construction |
Contractor(s) |
|
ü |
|
N/A |
- |
|
S9.7 and S9.10 |
A specification for fencing and demarcating individuals of Marsdenai lachnostoma (or other flora species of conservation interest, if found) adjacent to the proposed alignment of the flexible barriers will be prepared to protect the species. |
Slope mitigation works area/ During construction |
Contractor(s) |
|
ü |
|
N/A |
- |
|
S9.7 |
Induction training shall also be provided to all site personnel in order to brief them on this flora of conservation interest including the locations and their importance. |
Slope mitigation works area/ During construction |
Contractor(s) |
|
ü |
|
N/A |
- |
|
S9.7 |
The resident site supervisory staff will closely monitor the |
Slope mitigation works area/ |
Contractor(s) |
|
ü |
|
N/A |
- |
|
EIA Reference |
Recommended Environmental Protection Measures/ Mitigation Measures |
Objectives of the recommended measures & main concerns to address |
Implementation Agent |
Implementation Stage |
Implementation Status |
Relevant Legislation & Guidelines |
||
|
D |
C |
O |
||||||
|
|
conditions of concerned individuals during construction of flexible barriers in the close proximity. |
During construction |
|
|
|
|
|
|
|
S9.7 |
Erect fences along the boundary of the works area before the commencement of works to prevent vehicle movements and encroachment of personnel onto adjacent areas. |
All area/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S9.7 |
Regularly check the work site boundaries to ensure that they are not breached and that damage does not occur to surrounding areas. |
All area/ During construction |
Contractor(s)/ ET |
|
ü |
|
Implemented. |
- |
|
S9.7 |
Avoid any damage and disturbance, particularly those caused by filling and illegal dumping, to the surrounding habitats through proper management of waste disposal. |
All area/ During construction |
Contractor(s) |
|
ü |
|
Implemented |
- |
|
S9.7 |
Reinstate temporarily affected areas, particularly the habitats of plantation and shrubland-grassland immediately after completion of construction works, through on-site tree/shrub planting. The tree/shrub species will be chosen with reference to those in the surrounding area. |
All area/ During construction |
Contractor(s) |
|
ü |
|
N/A |
- |
|
S9.7 |
Affected habitats within the Clear Water Bay Country Bay shall be reinstated by hydro-seeding and planting of climbers and native shrub seedlings where practical upon completion of the slope mitigation works. |
All area/ During construction |
Contractor(s) |
|
ü |
|
N/A |
- |
Note: D - Design stage C - Construction O - Operation
|
EIA Reference |
Recommended Environmental Protection Measures/ Mitigation Measures |
Objectives of the recommended measures & main concerns to address |
Implementation Agent |
Implementation Stage |
Implementation Status |
Relevant Legislation & Guidelines |
||
|
D |
C |
O |
||||||
|
Landscape & Visual |
||||||||
|
S11.10 & 11.11 |
The construction area and area allowed for temporary structures, such as the contractor’s
office, will be minimized to a practical minimum. (MM1) |
All area/ Detailed design/ During construction/ During operation |
WSD/ Contractor(s) |
ü |
ü |
ü |
Implemented |
- |
|
S11.10 & 11.11 |
At the detailed design stage, the design team will seek to minimize the landscape footprint of the Project and above ground facilities, while satisfying all other requirements. (MM2) |
All area/ Detailed design/ During construction/ During operation |
WSD/ Contractor(s) |
ü |
ü |
ü |
Implemented |
- |
|
S11.10 & 11.11 |
Design principles will be adopted to take into account the surrounding area, particularly Clear Water Bay Country Park behind and the nearby waterfront, with due consideration given to: - green roofs where practical (i.e. without equipment on the roof); - roadside planting; - aesthetic treatment of all structures; - vertical greening; - screen planting along application site; and - landscape enhancement with amenity planting where practical including planting along the edge (site boundary) fence with native shrubs where feasible, to reduce their visual impact and blend them into the surrounding landscape. (MM3) |
All area/ Detailed design/ During construction/ During operation |
WSD/ Contractor(s) |
ü |
ü |
ü |
Implemented |
- |
|
S11.10 & 11.11 |
All trees within the Project Site or the potential slope mitigation works area will be carefully protected during construction according to DEVB TCW No. 10/2013 - Tree Preservation (MM4) |
All area/ Detailed design/ During construction/ During operation |
WSD/ Contractor(s) |
ü |
ü |
ü |
Implemented, reminder issued |
ETWB TCW No. 3/2006 - Tree Preservation. |
|
S11.10 & 11.11 |
No tree within the Country Park will be felled. Trees within the Site unavoidably affected by the works will be transplanted where necessary and practical. For trees that need to be felled, compensatory planting will be provided to the satisfaction of relevant Government departments. A compensatory tree planting proposal including locations of tree compensation will be submitted to seek relevant government department’s approval, in accordance with DEVB TC(W) No. 10/2013. (MM5) |
All area/ Detailed design/ During construction/ During operation |
WSD/ Contractor(s) |
ü |
ü |
ü |
Implemented |
DEVB TC(W) No. 10/2013 |
|
S11.10 & 11.11 |
Any slope mitigation works necessary to address natural terrain hazards, will be minimized to minimize any potential environmental impact to the Country Park e.g. soil nailing and rock stabilization will aim to avoid existing trees e.g. should any restoration of vegetation be necessary, the best planting matrix with native species will be established, with the aim of resembling the existing vegetation. (MM6) |
All area/ Detailed design/ During construction/ During operation |
WSD/ Contractor(s) |
ü |
ü |
ü |
N/A |
|
|
EIA Reference |
Recommended Environmental Protection Measures/ Mitigation Measures |
Objectives of the recommended measures & main concerns to address |
Implementation Agent |
Implementation Stage |
Implementation Status |
Relevant Legislation & Guidelines |
||
|
D |
C |
O |
||||||
|
S11.10 & 11.11 |
Dredging works for the installation of intake structures and outfall diffusers should be minimized to avoid or reduce any potential environmental impacts to as low as reasonably practicable (ALARP). The intake and outfall structures (e.g. intake openings and diffuser heads) will be prefabricated and transferred to site for installation. (MM7) |
All area/ Detailed design/ During construction/ During operation |
WSD/ Contractor(s) |
ü |
ü |
ü |
Implemented |
|
|
S11.10 & 11.11 |
All night-time lighting will be reduced to a practical minimum both in terms of number of level and will be hooded and directional. (MM8) units and lux level and will be hooded and directional. (MM8) |
All area/ Detailed design/ During construction/ During operation |
WSD/ Contractor(s) |
ü |
ü |
ü |
Implemented |
- |
Note: D - Design stage C - Construction O - Operation
|
EIA Reference |
Recommended Environmental Protection Measures/ Mitigation Measures |
Objectives of the recommended measures & main concerns to address |
Implementation Agent |
Implementation Stage |
Implementation Status |
Relevant Legislation & Guidelines |
||
|
D |
C |
O |
||||||
|
Landfill Gas Hazard |
||||||||
|
S12.7 |
During all works, safety procedures should be implemented to minimise the risks of fires and explosions, asphyxiation of workers and toxicity effects resulting from contact with contaminated soil and groundwater. |
All area/ Detailed design/ During construction/ During operation |
Contractor(s) |
ü |
ü |
ü |
Implemented |
- |
|
S12.7 |
During trenching and excavation as well as creation of confined spaces at near to or below ground level, precautions should be clearly laid down and rigidly Gas detection equipment and appropriate breathing apparatus should be available and used when entering confined spaces or trenches deeper than 1 meter. |
All area/ Detailed design/ During construction/ During operation |
Contractor(s) |
ü |
ü |
ü |
Implemented |
|
|
S12.7 |
The Contractor should make the workers are aware of potential hazards of working in confined spaces (any chamber, manhole or culvert which is large enough to permit access to personnel). Such work in confined spaces is controlled by the Factories and Industrial Undertakings (Confined Spaces) Regulations of the Factories and Industrial Undertakings Ordinance. Following the Safety Guide to Working in Confined Spaces ensures compliance with the above regulations. |
All area/ Detailed design/ During construction/ During operation |
Contractor(s) |
ü |
ü |
ü |
Implemented |
|
|
S12.7 |
Safety officers, specifically trained with regard to landfill gas and leachate related hazards and the appropriate actions to take in adverse circumstances, should be present on the site throughout the works, in particular, when works are undertaken below grade. |
All area/ Detailed design/ During construction/ During operation |
Contractor(s) |
ü |
ü |
ü |
Implemented |
|
|
S12.7 |
All personnel who work on site and all visitors to the site should be made aware of the possibility of ignition of gas in the vicinity of the works, the possible presence of contaminated water and the need to avoid physical contact with it. |
All area/ Detailed design/ During construction/ During operation |
Contractor(s) |
ü |
ü |
ü |
Implemented |
|
|
S12.7 |
Monitoring for landfill gas should be undertaken in all excavations, manholes, chambers (particularly during pipe jacking) and any confined spaces through the use of an intrinsically safe portable instrument, appropriately calibrated and capable of measuring the concentrations of methane. carbon dioxide and oxygen. |
All area/ Detailed design/ During construction/ During operation |
Contractor(s) |
ü |
ü |
ü |
Implemented |
|
|
S12.7 |
Monitoring frequency and areas to be monitored should be specified prior to commencement of groundwork, either by the Safety Officer, or by an appropriately qualified person. All measurements should be recorded and documented. |
All area/ Detailed design/ During construction/ During operation |
Contractor(s) |
ü |
ü |
ü |
Implemented |
|
|
EIA Reference |
Recommended Environmental Protection Measures/ Mitigation Measures |
Objectives of the recommended measures & main concerns to address |
Implementation Agent |
Implementation Stage |
Implementation Status |
Relevant Legislation & Guidelines |
||
|
D |
C |
O |
||||||
|
S12.7 |
Proceed drilling with adequate care and precautions against the potential hazards which may be encountered. |
All area/ Detailed design/ During construction/ During operation |
Contractor(s) |
ü |
ü |
ü |
Implemented |
|
|
S12.7 |
Prior to the commencement of the site works, the drilling contractor should devise a 'method-of- working' statement covering all normal and emergency procedures (including but not limited to number of operatives, experience and special skills of operatives, normal method of operations, emergency procedures, supervisors responsibilities, storage and use of safety equipment, safety procedures and signs, barriers and guarding). The site supervisor and all operatives must be familiar with this statement. |
All area/ During construction/ During operation |
Contractor(s) |
ü |
ü |
ü |
Implemented |
|
|
S12.7 |
Where below ground service entries are necessary to the Incoming Switchgear Room, 132 kV Substation and Chlorine Store (I) and (II), the entry point should be sealed to prevent gas entry. In addition, any below grade cable trenches entering the Incoming Switchgear Room and 132 kV Substation can become the pathway for landfill gas and hence grilled metal covers should be used. |
All area/ Detailed design/ During construction/ During operation |
Contractor(s) |
ü |
ü |
ü |
N/A |
|
|
S12.7 |
It is recommended regular landfill gas monitoring should be carried out at the Incoming Switchgear Room, 132 kV Substation and Chlorine Store (I) and (II). The monitoring frequency will be monthly for the first year of operation. If the monitoring results show no sign of landfill gas migration, reduce the monitoring frequency to once every six months. |
All area/ Detailed design/ During construction/ During operation |
Contractor(s) |
ü |
ü |
ü |
N/A |
|
|
S12.7 |
The manholes and utility pits within the Project Site and along the freshwater mains. Each manhole/ utility pit should be monitored with two measurements (at mid depth and base). Each measurement should be monitored for a minimum of 10 minutes. A steady reading and peak reading should be recorded at each manhole/ utility pit and for each measurement. The need for venting the manhole/ utility pit and further monitoring will be reviewed after the initial monitoring. |
All area/ Detailed design/ During construction/ During operation |
Contractor(s) |
ü |
ü |
ü |
Implemented |
|
|
S12.7 |
All construction, operation and maintenance personnel working on-site as well as visitors should be made aware of the hazards of landfill gas and its possible presence on-site. This should be achieved through a combination of posting warning signs in prominent places and also by access to detailed information on landfill gas hazards and the designs and procedural means by which these hazards are being minimized on-site. |
All area/ Detailed design/ During construction/ During operation |
Contractor(s) |
ü |
ü |
ü |
Implemented |
|
Note: D - Design stage C - Construction O - Operation
Appendix
D
Water Quality Monitoring Graphical Presentation
Appendix
E
Summary
of
Exceedances
Table E1 Summary of Exceedance in June 2022
|
Date |
Station |
Tide |
SS Level (mg/L) |
Action Level |
Limit Level |
|
07/06/2022 |
WSR2 |
Mid-Flood |
5.3 |
Y |
N |
|
07/06/2022 |
WSR4 |
Mid-Flood |
6.7 |
Y |
Y |
|
07/06/2022 |
WSR4 |
Mid-Ebb |
9.7 |
Y |
Y |
|
11/06/2022 |
WSR3 |
Mid-Ebb |
8.7 |
Y |
Y |
|
11/06/2022 |
WSR4 |
Mid-Ebb |
6.0 |
Y |
N |
|
13/06/2022 |
WSR33 |
Mid-Flood |
15.7 |
Y |
Y |
|
13/06/2022 |
WSR36 |
Mid-Flood |
11.7 |
Y |
Y |
|
13/06/2022 |
WSR16 |
Mid-Ebb |
5.7 |
Y |
N |
|
13/06/2022 |
WSR33 |
Mid-Ebb |
7.7 |
Y |
Y |
|
13/06/2022 |
WSR36 |
Mid-Ebb |
9.8 |
Y |
Y |
|
13/06/2022 |
WSR37 |
Mid-Ebb |
6.0 |
Y |
N |
|
15/06/2022 |
WSR16 |
Mid-Ebb |
8.1 |
Y |
Y |
|
17/06/2022 |
WSR1 |
Mid-Ebb |
7.7 |
Y |
Y |
|
28/06/2022 |
WSR2 |
Mid-Ebb |
5.2 |
Y |
N |
Table
E2 Summary
of
Exceedance
in
July
2022
|
Date |
Station |
Tide |
SS Level (mg/L) |
Action Level |
Limit Level |
|
16/07/2022 |
WSR3 |
Mid-Flood |
5.4 |
Y |
N |
|
16/07/2022 |
WSR4 |
Mid-Flood |
7.0 |
Y |
Y |
|
16/07/2022 |
WSR16 |
Mid-Flood |
5.9 |
Y |
N |
|
19/07/2022 |
WSR33 |
Mid-Flood |
5.2 |
Y |
N |
|
21/07/2022 |
WSR33 |
Mid-Flood |
8.0 |
Y |
Y |
|
23/07/2022 |
WSR16 |
Mid-Flood |
5.3 |
Y |
N |
|
23/07/2022 |
WSR37 |
Mid-Flood |
7.0 |
Y |
Y |
|
23/07/2022 |
WSR36 |
Mid-Ebb |
8.7 |
Y |
Y |
|
23/07/2022 |
WSR37 |
Mid-Ebb |
8.7 |
Y |
Y |
Table E3 Summary
of
Exceedance
in
August
2022
|
Date |
Station |
Tide |
SS Level (mg/L) |
Action Level |
Limit Level |
|
02/08/2022 |
WSR37 |
Mid-Ebb |
6.5 |
Y |
Y |
|
04/08/2022 |
WSR1 |
Mid-Ebb |
13.0 |
Y |
Y |
|
04/08/2022 |
WSR2 |
Mid-Ebb |
13.0 |
Y |
Y |
|
04/08/2022 |
WSR4 |
Mid-Ebb |
11.2 |
Y |
N |
|
06/08/2022 |
WSR2 |
Mid-Ebb |
6.6 |
Y |
N |
|
06/08/2022 |
WSR3 |
Mid-Ebb |
11.7 |
Y |
Y |
|
06/08/2022 |
WSR4 |
Mid-Ebb |
11.8 |
Y |
Y |
|
06/08/2022 |
WSR16 |
Mid-Ebb |
8.6 |
Y |
Y |
|
09/08/2022 |
WSR2 |
Mid-Ebb |
5.5 |
Y |
N |
|
09/08/2022 |
WSR36 |
Mid-Ebb |
5.2 |
Y |
N |
|
11/08/2022 |
WSR3 |
Mid-Flood |
6.8 |
Y |
N |
|
11/08/2022 |
WSR4 |
Mid-Flood |
6.7 |
Y |
N |
|
11/08/2022 |
WSR36 |
Mid-Flood |
7.3 |
Y |
Y |
|
15/08/2022 |
WSR3 |
Mid-Flood |
6.5 |
Y |
Y |
|
Date |
Station |
Tide |
SS Level (mg/L) |
Action Level |
Limit Level |
|
15/08/2022 |
WSR4 |
Mid-Flood |
7.1 |
Y |
Y |
|
30/08/2022 |
WSR1 |
Mid-Ebb |
5.2 |
Y |
N |
|
30/08/2022 |
WSR3 |
Mid-Ebb |
5.7 |
Y |
N |
|
30/08/2022 |
WSR4 |
Mid-Ebb |
6.7 |
Y |
Y |
|
30/08/2022 |
WSR2 |
Mid-Flood |
5.5 |
Y |
N |
|
30/08/2022 |
WSR3 |
Mid-Flood |
6.8 |
Y |
Y |
|
30/08/2022 |
WSR4 |
Mid-Flood |
5.2 |
Y |
N |
Appendix F
Waste Flow Table
Appendix G
Complaint Log
Table G1 Statistical
Summary
of
Environmental
Complaints
|
Reporting Period |
Environmental Complaint Statistics |
||
|
Frequency |
Cumulative |
Complaint Nature |
|
|
01 June 2022 - 31 August 2022 |
1 |
1 |
Air Quality & Water Quality |
Table G2 Statistical
Summary
of
Environmental
Summons
|
Reporting Period |
Environmental Summons Statistics |
||
|
Frequency |
Cumulative |
Details |
|
|
01 June 2022 - 31 August 2022 |
0 |
0 |
N/A |
Table G3 Statistical
Summary
of
Environmental
Prosecution
|
Reporting Period |
Environmental Prosecution Statistics |
||
|
Frequency |
Cumulative |
Details |
|
|
01 June 2022 - 31 August 2022 |
0 |
0 |
N/A |
Appendix
H
Event/ Action Plan for Water Quality Exceedance
Table G1 Event and Action Plan for Water Quality Monitoring
Appendix
I
Event/ Action Plan for Construction Noise Exceedance
Table E1 Event and Action Plan for Construction Noise Monitoring
