|
Rev. |
Description of Modification |
Date |
|
1. |
First Issue for Comments |
21/12/2023 |
|
2. |
Revised According to IEC’s Comments |
24/01/2024 |
|
3 |
Revised According to Comments |
16/02/2024 |
Summary of Monitoring Exceedance, Complaints, Notification of Summons and Prosecutions27
Appendix A Master Programme
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 15th 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 September 2023 to 30 November 2023.
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:
|
Administration Building - Carrying out the floor tiles works at 1/F - Installation of building services, cable laying, electrical switchboard, doors and handrails - Construction of 4 dog houses on roof - Construction of block wall in the pipe duct |
|
Chemical building - Construction of concrete slab for safety shower - Installation of leakage collection pit cover - Underground utility construction work - Repairing the defects inside the dangerous store - Landscape work at roof - Defect rectification |
|
Main Electrical & Central Chiller Plant Building |
|
- Installation of roof tile for fuel tank room, chillers, building services, electrical switchboard and cable laying - Installation of Roof Tile for Fuel Tank Room - Minor Installation of building services, electrical switchboard, cable laying, Pressure Test |
|
ActiDAFF - Underground utility construction work - Installation of access covers on roof - Construction of staircase no 2 - Carrying out finishing works for staircase no. 3 - Installation of access opening covers for filtered water tank - Installation of mechanical equipment, piping system, building services, electrical switchboards and cable laying |
|
Product Water Storage Tank Building - Installation of Cat Ladders in Water Tank A - Sealing Slab Openings in Water Tank A - Re-construction of Wall PW8 in Water Tank A - Underground utility construction - Installation of building services, cable laying, mechanical equipment and steel pipe |
|
OSCG Building - Installation of Design for Manufacturing and Assembly (DfMA) Panel, metal cladding and roller shutters and window - Underground utility construction work - Installation of building services, mechanical equipment, metal cladding and roller shutters and window - Placing Soil Mix at Roof - Protective Coating for dangerous goods Rooms |
|
Reverse Osmosis Building - Installation of building services, electrical switchboard, mechanical equipment, steel pipe, Glass Reinforced Plastics (GRP) pipe, pressure test of the GRP pipe, Membrane Loading, raised floor - Installation of metal cladding, handrailing, roller shutters and glass canopy and glass house - Underground utility construction work - Pipe laying at corridor and Backfilling Work |
|
Post Treatment Building - Installation of louvres, cat ladders, handrailing and metal cladding - Installation of building services, mechanical equipment and Glass Reinforced Plastics pipe - Placing Soil Mix at Roof |
|
- Forming Opening at Top of Water Tank for Rescue Opening - Underground utility construction work - Installation of building services, Installation of mechanical equipment and piping system, Pressure Test |
|
Inspection corridor - Construction of roof waterproofing works - Construction of staircase no. 1 and 2 - Construction of roof tiling works - Installation of building services, Lift Installation |
|
CO2 Tanks - Installation of pipes and electrical wiring - Combined Shaft and Pump room - Internal finishing, door, window and louver Other - Watermain works at CLP 132 kV Substation - Structure Construction and steel fence election of Wave Deflector Wall at seawall area - Staircases construction; Steel Bridge assembly and installation at elevated walkway - Rock anchor installation of slope work - Security Fence footing construction work - Irrigation System Construction, Landscape Construction, Footpath Construction and Road Construction - Manhole 5 GRP Installation work - Underground utility rectification work - Foot plinth concreting and barrier erection at flexible barrier - Water Pressure Test for FS and PL system - Glass Roof and Glass Canopy installation at elevated walkway - Marine works completed |
A6. The major environmental impacts brought by the above construction works include:
- Construction dust and noise generation from excavation works, construction works and rock cutting works;
- Waste generation from the construction activities
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 silt curtain at the marine areas;
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. Referring to EM&A Manual, the general water quality monitoring should be carried out when there are marine-related construction activities undertaken. General water quality monitoring at the ten monitoring stations (CE, CF, WSR1, WSR2, WSR3, WSR4, WSR16, WSR33, WSR36 and WSR37) was ceased from 1 September 2023 due to the completion of marine-related construction works.
A10. Dechlorinated effluent monitoring at two sampling locations (Contact Tank / Product Water Tank) during disinfection was carried out by AJCJV on 24 November 2023 for Total Residual Chlorine monitoring (TRC). Four (4) of dechlorinated effluent sample were taken in contact tank/ product water tank. The disinfection for the Connection to distribution network will be carried out on 2 & 3 December 2023.
A11. In this reporting period, 222 times of landfill gas monitoring were recorded at Wan Po Road (Ch0+390 - Ch0+780). No action and limit level exceedance for methane, oxygen and carbon dioxide was recorded.
A12. 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.
A13. 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 |
Sept 2023 |
Oct 2023 |
Nov 2023 |
|
Noise Monitoring |
N/A |
N/A |
N/A |
|
Water Quality Monitoring |
N/A |
N/A |
N/A |
|
TRC Monitoring for Main Disinfection |
N/A |
N/A |
24 November 2023 |
|
Landfill Gas monitoring |
1, 2, 4, 5, 6, 7, 9, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 25, 26, 27, 28 and 29 September 2023 |
3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 16, 17, 18 19, 20, 21, 24, 25, 26, 27, 28, 30 and 31 October 2023 |
1, 2, 3, 4, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 20, 21, 22, 23, 24, 25, 27, 28, 29 and 30 November 2023 |
|
Environmental Site Inspection |
5, 12, 19, 26 September 2023 |
3, 10, 17, 27 and 31 October 2023 |
7, 14, 21 and 27 November 2023 |
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 |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
|
Turbidity |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
|
|
SS |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
|
|
pH |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
|
|
Salinity |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
|
|
TRC |
N/A |
N/A |
N/A |
N/A |
N/A |
N/A |
|
|
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
A14. No environmental complaint, notifications of summons or prosecution was received during the reporting period.
Reporting Change
A15. 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 15th Quarterly EM&A Report for the Project which summarizes the key findings of the EM&A programme during the reporting period from 1 September 2023 to 30 November 2023.
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 |
Milton Law |
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) |
Alex Chan |
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.
|
Administration Building - Carrying out the floor tiles works at 1/F - Installation of building services, cable laying, electrical switchboard, doors and handrails - Construction of 4 dog houses on roof - Construction of block wall in the pipe duct |
|
Chemical building - Construction of concrete slab for safety shower - Installation of leakage collection pit cover - Underground utility construction work - Repairing the defects inside the dangerous store - Landscape work at roof - Defect rectification |
|
Main Electrical & Central Chiller Plant Building - Installation of roof tile for fuel tank room, chillers, building services, electrical switchboard and cable laying - Installation of Roof Tile for Fuel Tank Room - Minor Installation of building services, electrical switchboard, cable laying, Pressure Test |
|
ActiDAFF - Underground utility construction work - Installation of access covers on roof - Construction of staircase no 2 - Carrying out finishing works for staircase no. 3 - Installation of access opening covers for filtered water tank - Installation of mechanical equipment, piping system, building services, electrical switchboards and cable laying |
|
Product Water Storage Tank Building - Installation of Cat Ladders in Water Tank A - Sealing Slab Openings in Water Tank A - Re-construction of Wall PW8 in Water Tank A - Underground utility construction - Installation of building services, cable laying, mechanical equipment and steel pipe |
|
OSCG Building - Installation of Design for Manufacturing and Assembly (DfMA) Panel, metal cladding and roller shutters and window - Underground utility construction work - Installation of building services, mechanical equipment, metal cladding and roller shutters and window - Placing Soil Mix at Roof - Protective Coating for dangerous goods Rooms |
|
Reverse Osmosis Building - Installation of building services, electrical switchboard, mechanical equipment, steel pipe, Glass Reinforced Plastics (GRP) pipe, pressure test of the GRP pipe, Membrane Loading, raised floor - Installation of metal cladding, handrailing, roller shutters and glass canopy and glass house - Underground utility construction work - Pipe laying at corridor and Backfilling Work |
|
Post Treatment Building - Installation of louvres, cat ladders, handrailing and metal cladding - Installation of building services, mechanical equipment and GRP pipe - Placing Soil Mix at Roof |
|
- Forming Opening at Top of Water Tank for Rescue Opening - Underground utility construction work - Installation of building services, Installation of mechanical equipment and piping system, Pressure Test |
|
Inspection corridor - Construction of roof waterproofing works - Construction of staircase no. 1 and 2 - Construction of roof tiling works - Installation of building services, Lift Installation |
|
CO2 Tanks - Installation of pipes and electrical wiring - Combined Shaft and Pump room - Internal finishing, door, window and louver Other - Watermain works at CLP 132 kV Substation - Structure Construction and steel fence election of Wave Deflector Wall at seawall area - Staircases construction; Steel Bridge assembly and installation at elevated walkway - Rock anchor installation of slope work - Security Fence footing construction work - Irrigation System Construction, Landscape Construction, Footpath Construction, Road Construction - Manhole 5 GRP Installation work - Underground utility rectification work - Foot plinth concreting and barrier erection at flexible barrier - Water Pressure Test for FS and PL system - Glass Roof and Glass Canopy installation at elevated walkway - Marine works completed |
A summary of the valid permits, licences, and /or notifications on environmental protection for this Project is presented in Table 1.2.
|
Permit/ Licences |
Valid Period |
Status |
Remark |
|
|
From |
To |
|||
|
Environmental Permit |
||||
|
EP - 503/2015/A |
Throughout the Contract |
Valid |
- |
|
|
FEP - 01/503/2015/A |
Throughout the Contract |
Valid |
- |
|
|
Notification of Construction Works under the Air Pollution Control
(Construction Dust) Regulation (Form NA) |
||||
|
451539 |
Throughout the Contract |
Valid |
- |
|
|
Billing Account for
Disposal of Construction Waste |
||||
|
7036276 |
Throughout the Contract |
Valid |
- |
|
|
Chemical Waste Producer Registration |
||||
|
5213-839-A2987-01 |
Throughout the Contract |
Valid |
- |
|
|
Wastewater Discharge Licence (Land
and Marine works) |
||||
|
WT00035775-2020 |
23/08/2021 |
31/07/2025 |
Valid |
- |
|
WT00044188-2023 |
16/06/2023 |
30/06/2025 |
Valid |
- |
|
Construction Noise Permit |
||||
|
GW-RE0640-23 |
22/06/2023 |
21/12/2023 |
Valid |
- |
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 |
Ceased from 1 September 2023 |
|
TRC Monitoring for Main
Disinfection |
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 |
Completed |
|
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, 222 times of landfill gas monitoring were recorded at Wan Po Road (Ch0+390 - Ch0+780). No exceedance of action or 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.
To 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 2.2 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.
In 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 |
- |
|
Total Residual Chlorine (TRC) NOTE 1 |
mg/L |
- |
|
Laboratory measurements |
||
|
Suspended Solids |
mg/L |
SS |
NOTE 1: Monitoring of Total Residual
Chlorine will be conducted when cleaning and sterilization of the
new freshwater main is carried out.
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.
Construction Phase
The impact
water quality monitoring locations are detailed
in Table 3.2 and
shown in Figure 3.1
below.
|
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 |
Figure 3.1 Impact Water Quality Monitoring
Locations under EM&A Manual
Main Disinfection
According to the approved Flushing and Disinfection Procedure and Supplementary of the Disinfection Procedure for Desalination Plant at Tseung Kwan O, the sampling point of the dechlorinated effluent was located at Contact tank/Product Water Tank (PWT) and T1GKC01AA502/manhole 18.
The approved sampling location was shown in Table 3.5, Figure 3.2 and Figure 3.3 below.
Table 3.5 Sampling location of dechlorinated effluent
|
System/Loop |
Discharge location |
Sampling Location |
Parameter |
|
Contact tank/ Product Water Tank (PWT) |
Culvert |
Contact tank/PWT |
TRC |
|
Connection to dist. network |
Manhole 18 in connection point |
Sampling point T1GKC01AA502/manhole 18 |
Figure 3.2 Impact water quality
monitoring point for dechlorinated effluent (Contact
tank/PWT)
Figure 3.3 Impact water quality
monitoring point for dechlorinated effluent (Sampling
point T1GKC01AA502/manhole 18)
The monitoring methodology, equipment used, and QA/QC procedures could be referred 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 |
Tung Lung Chau Fish Culture Zone |
|
|
Zone |
5.0 mgL-1 or level at control station |
|
|
|
(Whichever the lower) |
|
Parameters |
Action |
Limit |
