CONTENTS

Executive Summary....................................................................................................................................................................... 1

1.                  Basic Project Information............................................................................................................................................ 1

2.                  Noise...................................................................................................................................................................................... 5

3.                  Water Quality.................................................................................................................................................................. 10

4.                  Waste.................................................................................................................................................................................. 18

5.                  Landfill Gas Monitoring.............................................................................................................................................. 19

6.                  SUMMARY OF MONITORING EXCEEDANCE, COMPLAINTS, NOTIFICATION OF SUMMONS AND PROSECUTIONS............................................................................................................................................................................ 20

7.                  EM&A Site Inspection.................................................................................................................................................. 22

8.                  Future Key Issues.......................................................................................................................................................... 23

9.                  Conclusions and Recommendations..................................................................................................................... 24

 

 

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             Impact Monitoring Schedule of the Reporting Month (Blank)

Appendix E             Event/Action Plan for Noise Exceedance

Appendix F             Noise Monitoring Equipment Calibration Certificate (Blank)

Appendix G             Event/Action Plan for Water Quality Exceedance

Appendix H             Waste Flow Table

Appendix I              Site Inspection Proforma

Appendix J              Complaint Log

Appendix K             Impact Monitoring Schedule of Next Reporting Month (Blank)

 


 

 

EXECUTIVE SUMMARY

 

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 Project.

 

A2.      In accordance with the Updated Environmental Monitoring and Audit (EM&A) Manual for the Project, 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 Project.

 

A3.      This is the 5th Monthly EM&A Report, prepared by ASCL, for the Project 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 July 2020 to 31 July 2020.

 

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 following:

-             Land Survey;

-             Ground Levelling;

-             Access Road Construction;

-             Site office formation work and footing;

-             Site office’s roof waterproofing and internal E&M installation;

-             Construction of 132kV substation;

-             Construction of Temp 11kV substation and drawpits / ducting;

-             Pre-boring for combine shaft and installation of sheeppiles;

-             Excavation and formation for ActiDAFF and RO;

-             Erection of hoarding around site office;

-             Installation of temporary watermain;

-             Excavation and installation of temporary soil nail for Product Water Tank;

-             Installation of tower cranes.

 

A6.      The major environmental impacts brought by the above construction works include:

-             Construction dust and noise generation from the ground investigation works, access road construction and site office formation;

-             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

-             Sorting and storage of general refuse and construction waste

 

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 project-related exceedance of the Action Level was recorded during the reporting period.

 

A9.      No water quality monitoring was conducted in the reporting month since the commencement of marine construction and dredging activities for the Project are scheduled in November 2020 the earliest. No project-related exceedance of the Action Level was recorded during the reporting period.

 

A10.   Weekly site inspections of the construction work by ET were carried out on 7, 14, 21 & 29 July 2020 to audit the mitigation measures implementation status. Bi-weekly joint site inspection was carried out on 14 & 29 July 2020 by ET and IEC. Observations were recorded in the site inspection checklists and provided to the contractors together with the appropriate follow-up actions where necessary.

 

COMPLAINT HANDLING AND PROSECUTION

 

A11.   No project-related environmental complaint was received during the reporting period.

A12.   Neither notifications of summons nor prosecution was received for the Project.

REPORTING CHANGE

 

A13.   There was no change to be reported that may affect the on-going EM&A programme.

 

SUMMARY OF UPCOMING KEY ISSUES AND KEY MITIGATION MEASURES

A14.   Key activities anticipated in the next reporting period for the Project will include the following:

-             Land Survey;

-             Ground Levelling;

-             Access Road Construction;

-             Construction of 132kV substation (G/F to 1st floor)


-             Pre-boring and installation of sheetpiles for combine shaft;

-             Construction of ActiDAFF foundation;

-             Excavation and construction for RO foundation;

-             Excavation and installation of temporary soil nail for Product Water Tank;

-             Erection of tower cranes.

 

A15.   The major environmental impacts brought by the above construction works will include:

-             Construction dust and noise generation from GI works, access road construction and site office formation work;

-             Waste generation from construction activities

 

A16.   The key environmental mitigation measures for the Project in the coming reporting period associated with the above construction works will include:

-             Dust suppression by regular wetting and water spraying for construction works

-             Reduction of noise from equipment and machinery on-site

-             Sorting and storage of general refuse and construction waste


 

 

1.            BASIC PROJECT INFORMATION

 

1.1.       BACKGROUND

The Jardine Engineering Corporation, Limited, China State Construction Engineering (Hong Kong) Limited and Acciona Agua, S.A. Trading 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 Project).

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 Project; 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 Project.

 

1.2.       THE REPORTING SCOPE

This is the 5th Monthly EM&A Report for the Project which summarizes the key findings of the EM&A programme during the reporting period from 1 July to 31 July 2020.

 

1.3.       PROJECT ORGANIZATION

The Project Organization structure for Construction Phase is presented in Figure 1.1.

Figure 1.1     Project Organization Chart

 


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 (Black & Veatch)

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)

 

Adi Lee

 

2618-2831

 

1.4.       SUMMARY OF CONSTRUCTION WORKS

Details of the major construction activities undertaken in this reporting period are shown in below. The construction programme is presented in Appendix A.


Key activities carried out in this reporting period for the Project included the following:

-             Plate Load Test;

-             Land Survey;

-             Ground Levelling;

-             Ground Investigation;

-             Access Road Construction;

-             Site office formation work and footing;

-             Earth mat installation at 132kV substation;

-             Construction of 132kV substation footing;

-             Construction of Temp 11kV substation;

-             Ducts laying for temp 11kV substation;

-             Excavation for combined shaft.

 

1.5.       SUMMARY OF ENVIRONMENTAL STATUS

A summary of the valid permits, licences, and /or notifications on environmental protection for this Project is presented in Table 1.2.

Table 1.2      Summary of the Status of Valid Environmental Licence, Notification, Permit and Documentations

 

Permit/ Licenses/ Notification

Reference

Validity Period

Remarks

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

30/12/2019 -

30/03/2023

 

Wastewater Discharge Licence

-

-

Under Application

Chemical Waste Producer Registration

5213-839-A2987-01

Throughout the Contract

 

Construction Noise Permit (24 hours)

GW-RE0474-20

04/06/2020 -

03/12/2020

 

Billing Account for

Disposal of Construction Waste

7036276

Throughout the Contract

 

 

 

The status for all environmental aspects is presented in Table 1.3.

 


Table 1.3      Summary of Status for Key Environmental Aspects under the Updated EM&A Manual

 

Parameters

Status

Water Quality

Baseline Monitoring under EM&A Manual

The baseline water quality monitoring was conducted between 12 May 2020 to 6 Jun 2020

Impact Monitoring

The impact water quality monitoring has been scheduled after the commencement of marine construction works

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 Monitoring Plan

On-going

Environmental Audit

Site Inspection covering Measures of Air Quality, Noise Impact, Water Quality, Waste, Ecological Quality, Fisheries,

Landscape and Visual

On-going

 

 

The impact monitoring schedule for the reporting month to be shown at Appendix D is intentionally left blank since no impact monitoring was conducted in the reporting month.

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.

 

 

2.            BASIC PROJECT INFORMATION

2.1.   MONITORING REQUIREMENTS

To ensure no adverse noise impact, 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.

In accordance with the EM&A Manual, baseline noise level at the noise monitoring stations were established as presented in the Baseline Monitoring Report. Impact noise monitoring will be conducted once per week in the form of 30-minutes measurements Leq, L10 and L90 levels recorded at each monitoring station between 0700 and 1900 hours on normal weekdays.

Referring to EM&A manual Section 4.1.2, the impact noise monitoring should be carried out at all the designated monitoring stations when there are project-related construction activities undertaken within a radius of 300m from the monitoring stations.

No impact monitoring for noise impact was conducted in the reporting month 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.

Impact noise monitoring will be conducted weekly in the reporting period between 0700-1900 hours on normal weekdays. No construction works were carried out during 1900-0700 hours in all days or any time on Sundays or general holidays during the reporting period.

Construction noise level 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 hours 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 hrs

Day time: 0700-1900 hrs

(during weekdays)

 

normal

Continuously in

Leq 5min/Leq 30min (average of 6 consecutive Leq 5min)

 

Leq L10

 

 

30min 30min

 

& L90

 

 

 

30min

 

2.2.   MONITORING LOCATIONS

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.

 

Table 2.2       Noise Sensitive Receivers

 

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

 

 

 


2.3.   IMPACT MONITORING METHODOLOGY

2.4.1 Integrated sound level meter shall be used for the noise monitoring. The meter shall be in compliance with the International Electrotechnical Commission Publications 651: 1979 (Type 1) and 804: 1985 (Type 1) specifications. Immediately prior to and following each noise measurement the accuracy of the sound level meter shall be checked using an acoustic calibrator generating a known sound pressure level at a known frequency. Measurements may be accepted as valid only if the calibration level before and after the noise measurements agree to within 1.0 dB(A). Calibration certificates of the instruments used to be shown at Appendix F is intentionally left blank since no impact monitoring equipment was used in the reporting month.

Noise measurements shall not be made in the presence of fog, rain, wind with a steady speed exceeding 5 m/s or wind with gusts exceeding 10 m/s. The wind speed shall be checked with a portable wind speed meter capable of measuring the wind speed in m/s.

Table 2.3          Impact Noise Monitoring Equipment

 

Equipment

Brand and Model

Detection Limit

Sound Level Meter

Nti XL2

30-130 dB(A)

Sound Level Meter Calibrator

Rion NC-74

Nil

Pocket Wind Meter Anemometer

Kestrel 1000 Wind Meter

Nil

 

2.4.   ACTION AND LIMIT LEVELS

The Action/Limit Levels 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 2.4.

 

Table 3.4         Action and Limit Levels for Noise per Updated EM&A Manual

 

Time Period

Action

Limit (dB(A))

 

0700-1900 hours 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.

 

2.5.   MONITORING RESULTS AND OBSERVATIONS

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 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


 

 

3.            WATER QUALITY

 

In accordance with the recommendations of the EIA, water quality EM&A is required during dredging for the submarine pipelines and, during operation phase. In addition, baseline water quality monitoring will be required 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 will be carried out to allow any deteriorating water quality to be readily detected and timely action taken to rectify the situation. The status and locations of water quality sensitive receivers and the marine works location may change after issuing this Document. If required, the ET in consultation with IEC will propose updated  monitoring locations and seek approval from EPD.

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.

 

In addition, the marine works contractor is required to complete a silt curtain efficiency test for the combined use of floating silt curtain type and cage type silt curtain for dredging at seawater intake to confirm the silt curtain reduction efficiency assumptions of the assessment. The details of testing plan together with the silt curtain deployment plan updated testing plan shall be submitted by the ET to seek approval from the IEC and EPD.

 

3.1.       IMPACT MONITORING METHODOLOGY

 

3.1.1.  WATER QUALITY PARAMETERS

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 to be measured in the baseline monitoring are listed in Table 3.1.

 


Table 3.1      Parameters measured in the baseline marine water quality monitoring

 

Parameters

Unit

Abbreviation

In-situ measurements

Dissolved oxygen

mg/L

DO

Temperature

oC

-

pH

-

-

Turbidity

NTU

-

Salinity

0/00

-

Total Residual Chlorine NOTE1

mg/L

TRC

Laboratory measurements

Suspended Solids

mg/L

SS

Iron-Soluble NOTE2

mg/L

Fe

Anti-scalant as Reactive Phosphorus NOTE2

mg/L

PO4 as P-

NOTE 1: Monitoring of TRC will be conducted when cleaning and sterilization of the new freshwater main is carried out.

 

NOTE 2: The testing methods shall be submitted to EPD for approval prior to the commencement of monitoring programme

In addition to the water quality parameters, other relevant data will also be 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.

 

3.1.2.  MONITORING EQUIPMENT

For water quality monitoring, the following equipment will be used:

 

Dissolved Oxygen and Temperature Measuring Equipment - The instrument will be a portable, weatherproof dissolved oxygen measuring instrument complete with cable, sensor, comprehensive operation manuals, and will be operable from a DC power source. It will be capable of measuring: dissolved oxygen levels in the range of 0 - 20 mg/L and 0 - 200% saturation; and a temperature of 0

- 45 degrees Celsius. It shall have a membrane electrode with automatic temperature compensation complete with  a cable of  not  less  than  35  m  in  length. Sufficient stocks  of  spare  electrodes and


cables shall be available for replacement where necessary (e.g. YSI model 59 DO meter, YSI 5739 probe, YSI 5795A submersible stirrer with reel and cable or an approved similar instrument).

Turbidity Measurement Equipment - The instrument will be a portable, weatherproof turbidity- measuring unit complete with cable, sensor and comprehensive operation manuals. The equipment will be operated from a DC power source, it will have a photoelectric sensor capable of measuring turbidity between 0 - 1000 NTU and will be complete with a cable with at least 35 m in length (for example Hach 2100P or an approved similar instrument).

Salinity Measurement Instrument - A portable salinometer capable of measuring salinity in the range of 0 - 40 ppt will be provided for measuring salinity of the water at each monitoring location.

Water Depth Gauge - A portable, battery-operated echo sounder (for example Seafarer 700 or a similar approved instrument) will be used for the determination of water depth at each designated monitoring station. This unit will preferably be affixed to the bottom of the work boat if the same vessel is to be used throughout the monitoring programme. The echo sounder should be suitably calibrated. The ET shall seek approval for their proposed equipment with the client prior to deployment.

Current Velocity and Direction - No specific equipment is recommended for measuring the current velocity and direction. The environmental contractor shall seek approval of their proposed equipment with the client prior to deployment.

Positioning Device - A Global Positioning System (GPS) shall be used during monitoring to allow accurate recording of the position of the monitoring vessel before taking measurements. The Differential GPS, or equivalent instrument, should be suitably calibrated at appropriate checkpoint (e.g. Quarry Bay Survey Nail) to verify that the monitoring station is at the correct position before the water quality monitoring commence.

Water Sampling Equipment - A water sampler, consisting of a PVC or glass cylinder of not less than two litres, which can be effectively sealed with cups at both ends, will be used (e.g. Kahlsico Water Sampler 13SWB203 or an approved similar instrument). The water sampler will have a positive latching system to keep it open and prevent premature closure until released by a messenger when the sampler is at the selected water depth.

Total Residual Chlorine for Discharge of Sterilization Water - Total residual chlorine (TRC) shall be measured in-situ using a handheld colorimeter with its testing toolkits.

 

3.1.3.  SAMPLING / TESTING PROTOCOLS

All in situ monitoring instruments will be checked, calibrated and certified by a laboratory accredited under HOKLAS or any other international accreditation scheme before use, and subsequently re-calibrated at monthly intervals throughout the stages of the water quality monitoring. Responses of sensors and electrodes will be checked with certified standard solutions before each use.

 


On-site calibration of field equipment shall follow the “Guide to On-Site Test Methods for the Analysis of Waters”, BS 1427: 2009. Sufficient stocks of spare parts shall be maintained for replacements when necessary. Backup monitoring equipment shall also be made available so that monitoring can proceed uninterrupted even when equipment is under maintenance, calibration etc.

 

3.1.4.  LABORATORY MEASUREMENT AND ANALYSIS

All laboratory work shall be carried out in a HOKLAS accredited laboratory. Sufficient volume of each water sample shall be collected at the monitoring stations for carrying out the laboratory analyses. Using chain of custody forms, collected water samples will be transferred to an HOKLAS accredited laboratory for immediate processing. The determination work shall start within the next working day after collection of the water samples. The laboratory measurements shall be provided to the client within 5 working days of the sampling event. Analytical methodology and sample preservation of other parameters will be based on the latest edition of Standard Methods for the Examination of Waste and Wastewater published by APHA, AWWA and WPCF and methods by USEPA, or suitable method in accordance with requirements of HOKLAS or another internationally accredited scheme. The submitted information should include pre-treatment procedures, instrument use, Quality Assurance/Quality Control (QA/QC) details (such as blank, spike recovery, number of duplicate samples per-batch etc), detection limits and accuracy. The QA/QC details shall be in accordance with requirements of HOKLAS or another internationally accredited scheme.

Parameters for laboratory measurements, their standard methods and their detection limits are presented in Table 3.2.

Table 3.2        Laboratory measurements, standard methods and corresponding detection limits of marine water quality monitoring

 

Parameters

Standard Methods

Detection Limit

Reporting Limit

Precision

Dissolved oxygen (mg/L)

Instrumental, CTD

0.1

-

+- 25%

Temperature (oC)

Instrumental, CTD

0.1

-

+- 25%

pH

Instrumental, CTD

0.1

-

+- 25%

Turbidity (NTU)

Instrumental, CTD

0.1

-

+- 25%

Salinity (0/00)

Instrumental, CTD

0.1

-

+- 25%

Suspended Solids (mg/L)

APHA 17th Ed 2540D

1.0

2.0

+- 17%

Total Residual Chlorine (mg/L)

APHA 21st Ed 4500

- Cl G NOTE1

0.1NOTE1

0.2NOTE1

+- 10% NOTE1

Iron-soluble

USEPA 6010C NOTE 1

0.2NOTE1

0.2NOTE1

+- 25%NOTE1


 

Parameters

Standard Methods

Detection Limit

Reporting Limit

Precision

Anti-scalant as Reactive phosphorus

APHA 4500P: B&F

NOTE1

0.01NOTE1

0.01NOTE1

+- 25%NOTE1

NOTE1: The testing methods, Quality Assurance/Quality Control (QA/QC) details, detection limits and accuracy shall be submitted to EPD for approval prior to the commencement of monitoring programme.

 

If exceedances were found during water monitoring, the actions in accordance with the Event and Action Plan shall be carried out according to Appendix G.

 

3.1.5.  MONITORING LOCATION

The water quality monitoring locations for baseline in accordance to the EM&A Manual and Contract Specification are shown in Figure 3.1 and Figure 4.1 respectively, and detailed in Table 3.3 below. A schedule for water quality monitoring shall be prepared by the ET and approved by IEC and EPD prior to the commencement of the monitoring.

Table 3.3 Location of Baseline 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

WSR1 to WSR37 were identified in accordance with Annex 14 of the EIAO-TM as well as Clause

3.4.4.2 of the Environmental Impact Assessment Study Brief for Desalination Plant at Tseung Kwan O (No. ESB-266/2013). WSR1 to WSR3 are sited near the Tung Lung Chau Fish Culture Zone; WSR16 and WSR36 are sited near the coral assemblages along the coastlines of Fat Tong Chau and Kwun Tsai respectively; WSR 4 and WSR33 are sited near the Coastal Protection Area and coral assemblages in waters of Tai Miu Wan; WSR37 is sited near the fisheries resource including spawning and nursery grounds at the coastal water of Tit Cham Chau.

 


Figure 3.1         Baseline water quality monitoring locations under EM&A Manual

 

 

 


 

3.1.6.  SAMPLING FREQUENCY

During periods when there are dredging works, impact monitoring should be undertaken at the monitoring stations as shown in Figure 3.1 and Table 3.3 three days per week during the construction phase after the commencement of marine construction works and dredging activities. Monitoring at each station would be undertaken at both mid-ebb and mid-flood tides on the same day. The tidal range selected for the baseline monitoring will be at least 0.5 m for both flood and ebb tides as far as practicable. The interval between two sets of monitoring would not be less than 36 hours. The monitoring frequency would be increased in the case of exceedances of Action/Limit Levels if considered necessary by ET. Monitoring frequency would be maintained as far as practicable.

 

The monitoring location/position, time, water depth, water temperature, salinity, weather conditions, sea conditions, tidal stage, special phenomena and work underway at the marine works site will be recorded.

3.1.7.  SAMPLING DEPTHS & REPLICATION

For baseline monitoring, each station will be sampled and measurements/ water samples will be taken at three depths, 1 m below the sea surface, mid-depth and 1 m above the seabed. For stations that are less than 3 m in depth, only the mid depth sample shall be taken. For stations that are less than 6 m in depth, only the surface and seabed sample shall be taken. For in situ measurements, duplicate readings shall be made at each water depth at each station. Duplicate water samples shall be collected at each water depth at each station.

 

3.2.       MONITORING PROGRAMME

The ET of the Project had conducted the baseline water monitoring between 12 May 2020 to 6 Jun 2020 at the thirteen designated monitoring stations and the six designated monitoring at waters near TKO in accordance with the EM&A Manual and Contract Specification respectively. The monitoring results was presented in Baseline Water Quality Monitoring Report separately.

The commencement of marine construction and dredging activities for the Project are scheduled in November 2020 the earliest. The impact water monitoring shall be scheduled after the commencement of marine construction and dredging activities. Hence, no water monitoring was conducted during the reporting month.

 

 


 

4.            WASTE

 

The 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 month are summarised in Table 4.1. Details of cumulative waste management data are presented as a waste flow table in Appendix H.

Table 4.1 Quantities of Waste Generated from the Project during July 2020

 

 

 

 

 

 

Reporting Month

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 (see Note)

 

 

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)

July 2020

146.08

0

0

0

146.08

0

0

0

0

0

3.92

Notes:  (1) Plastics refer to plastic bottles / containers, plastic sheets / foam from packaging material

 


5.            LANDFILL GAS MONITORING

 

5.1.       MONITORING REQUIREMENT

In 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.

 

5.2.       MONITORING LOCATION

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.

 

5.3.       MONITORING PROGRAMME

For the part of the desalination plant and the indicative area of natural slope mitigation works fall within the SENT Landfill Extension Consultation Zone in this contract. Since the SENT Landfill Extension is still under construction, the Landfill gas monitoring shall be conducted after the commencement of operation of the SENT Landfill Extension which will be 2021 Quarter 3 according to the latest construction programme shown in the monthly EM&A Report of SENT Landfill Extension. The Contractor’s safety officer shall keep review the necessity of landfill gas monitoring during the construction stage. No landfill gas monitoring was conducted in the reporting period.

 

 


6.            SUMMARY OF MONITORING EXCEEDANCE, COMPLAINTS,  NOTIFICATION OF SUMMONS AND PROSECUTIONS

The Environmental Complaint Handling Procedure is shown in below Figure 6.1:

 

 

Figure 6.1     Environmental Complaint Handling Procedures

 


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 impact water quality monitoring was conducted in the reporting month since the commencement of marine construction and dredging activities for the Project are scheduled in November 2020 the earliest.

No project-related exceedance of the Action Level was recorded during the reporting period. No notification of summons and prosecution was received in the reporting period.

Statistics on complaints and regulatory compliance are summarized in Appendix J.

 

 


7.     EM&A SITE INSPECTION

Site inspections were carried out on a weekly basis to monitor the implementation of proper environmental pollution control and mitigation measures under the Contract. In the reporting period, site inspections were carried out on 7, 14, 21 & 29 July 2020 at the site portions list in  Table 6.1 below.

Table 7.1      Summaries of Site Inspection Record

 

Date

Inspected Site Portion

Time

2 July 2020

TKO 137

14:40 - 15:58 PM

14 July 2020

TKO 137

14:55 - 17:00 PM

21 July 2020

TKO 137

14:30 - 16:50 PM

29 July 2020

TKO 137

09:30 - 11:00 AM

Two joint site inspection with IEC was carried out on 14 & 29 July 2020.

 

Environmental deficiencies were observed during weekly site inspection. Key observations during the site inspections and during the reporting period are summarized in Table 7 .2.

Table 7.2      Site Observations

 

Date

Environmental Observations

Follow-up Status

2 July 2020

(Site inspection)

Observation(s) and Recommendation(s)

1. No major observation was observed.

Nil.

14 July 2020 (Site inspection)

Observation(s) and Recommendation(s)

1. Chemicals drums were not placed inside a drip tray at 132 kV and combined shaft area.

1. Chemical drums were removed or placed inside drip tray.

21 July 2020

(Site inspection)

Observation(s) and Recommendation(s)

1. No major observation was observed.

Nil.

29 July 2020

(Site inspection)

Observation(s) and Recommendation(s)

1. No major observation was observed.

Nil.

According to the EIA Study Report, Environmental Permit, contract documents and EM&A Manual, the mitigation measures detailed in the documents are implemented as much as practical during the reporting period. An updated Implementation Status of Environmental Mitigation Measures (EMIS) is provided in Appendix C.

Site inspection proforma of the reporting period is provided in Appendix I.

 


8.            FUTURE KEY ISSUES

 

Works to be undertaken in the next reporting month are:

-             Land Survey;

-             Ground Levelling;

-             Access Road Construction;

-             Construction of 132kV substation (G/F to 1st floor)

-             Pre-boring and installation of sheetpiles for combine shaft;

-             Construction of ActiDAFF foundation;

-             Excavation and construction for RO foundation;

-             Excavation and installation of temporary soil nail for Product Water Tank;

-             Erection of tower cranes.

 

The major environmental impacts brought by the above construction works will include:

-             Construction dust and noise generation from GI works, access road construction and site office formation work;

-             Waste generation from construction activities

 

The key environmental mitigation measures for the Project in the coming reporting period associated with the above construction works will include:

-             Dust suppression by regular wetting and water spraying for construction works

-             Reduction of noise from equipment and machinery on-site

-             Sorting and storage of general refuse and construction waste

 

Referring to EM&A Manual Section 4.1.2, the impact noise monitoring should be carried out at all the designated monitoring stations when there are project-related construction activities undertaken within a radius of 300m from the monitoring stations.

The impact monitoring schedule for the next reporting month to be shown at Appendix K is intentionally left blank since no impact monitoring will be conducted in the next reporting month.

 

 


9.            CONCLUSIONS AND RECOMMENDATIONS

 

This is the 5th Monthly EM&A Report for the Project which summarizes the key findings of the EM&A programme during the reporting period from 1 July to 31 July 2020, 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.

construction activities undertaken within a radius of 300m from the monitoring locations.

 

No impact water monitoring was conducted in the reporting period due to no marine construction works and dredging activities were conducted in the reporting period.

No project-related exceedance of the Action / Limit Level was recorded during the reporting period.

 

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 month, the Contractor is reminded to pay attention on maintaining proper materials storage.

No environmental complaint was received in the reporting period.

 

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

 

N/A

Air Pollution Control (Construction Dust)

S4.8.1

Impervious sheet will be provided for skip hoist for material transport.

Land site/ During Construction, particularly dry season

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

 

S4.8.1

Dropping heights for excavated materials should be controlled to a practical height to minimise the fugitive dust arising from unloading.

Land site/ During Construction

Contractor(s)

 

ü

 

N/A

 

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

 

N/A

 

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

 

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

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

 

S4.8.1

Stockpiles of more than 20 bags of cement, dry pulverised 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 minimise 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


 

 

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

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

Land site/ During construction

Contractor(s)

 

ü

 

N/A

Guidance Note on a Best

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,

S5.7

Silencers or mufflers on construction equipment will be utilised and will be properly maintained during the construction phase.

Noise control/ During construction

Contractor(s)

 

ü

 

N/A

A Practical Guide for the Reduction of Noise from Construction

Works,

S5.7

Mobile plant, if any, will be sited as far away from NSRs as possible.

Noise control/ During construction

Contractor(s)

 

ü

 

Implemented

A Practical Guide for the Reduction of Noise from Construction

Works,

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

A Practical Guide for the Reduction of Noise

from              Construction Works,

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

A Practical Guide for the Reduction of Noise

from              Construction Works,

S5.7

Material stockpiles and other structures will be effectively utilised, wherever practicable, in

screening noise from on-site construction activities.

Noise control/ During construction

Contractor(s)

 

ü

 

N/A

A Practical Guide for the Reduction of Noise

from              Construction Works,

S5.7

Use of Quite Powered Mechanical Equipment

(QPME).

Noise control/

During construction

Contractor(s)

 

ü

 

Implemented

A Practical Guide for

the Reduction of Noise from Construction Works,

S5.7

Movable noise barriers of 3m in height with skid footing should be used and located within a few metres 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

Noise control/ During construction

Contractor(s)

 

ü

 

N/A

A Practical Guide for the Reduction of Noise from Construction Works,


 

 

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

 

surface density of at least 7 kg m-2 and have no openings or gaps.

 

 

 

 

 

 

 

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

A Practical Guide for the Reduction of Noise from Construction

Works,

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

 

Implemented

A Practical Guide for the Reduction of Noise from Construction Works

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

 

Implemented

A Practical Guide for the Reduction of Noise from Construction Works

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

 


 

 

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

S5.9

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 (ET)

 

ü

 

Implemented

 

S5.10

The effectiveness of on-site control measures could also be evaluated through the regular site audits.

All facilities/ 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 recommende measures & main concerns to address

Implementatio n 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

 

N/A

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

 

N/A

-

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

 

N/A

-

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

 

N/A

-

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

 

N/A

-

S6.9

All vessels must have a clean ballast system.

Marine Dredging/ During construction

Contractor(s)

 

ü

 

N/A

-

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

 

N/A

-

S6.9

No soil waste is allowed to be disposed overboard.

Marine Dredging/ During construction

Contractor(s)

 

ü

 

N/A

-


 

 

EIA Reference

Recommended Environmental Protection Measures/ Mitigation Measures

Objectives of the recommende measures & main concerns to address

Implementatio n Agent

Implementation Stage

Implementation status

Relevant Legislation & Guidelines

D

C

O

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

ProPECC PN 1/94 TM

Standard under the WPCO

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

-