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 4th 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 June 2020 to
30 June 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;
-
Erection of hoarding around
site office;
-
Installation
of temporary
watermain.
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 2, 8, 17, 23 & 30 June 2020 to audit the mitigation measures implementation status. Bi-weekly joint site inspection was carried out on 17 & 30 June
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;
-
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.
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 4th Monthly EM&A Report for the Project which summarizes the key findings of the EM&A programme during the reporting
period from 1 June
to 30 June 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
|
Ref. No.: 451539
|
30/12/2019 –
|
|
|
Construction Works
|
30/03/2023
|
|
under the Air Pollution
|
|
Control (Construction
|
|
Dust) Regulation (Form
|
|
NA)
|
|
Wastewater Discharge Licence
|
-
|
-
|
Under Application
|
|
Chemical Waste Producer Registration
|
5213-839-A2987-01
|
Throughout the Contract
|
|
|
Construction Noise
|
GW-RE0249-20
|
09/04/2020 –
|
GW-RE0249-20 was
|
|
Permit (24 hours)
|
08/10/2020
|
superseded by GW-
|
|
GW-RE0474-20
|
04/06/2020 –
03/12/2020
|
RE0474-20.
|
|
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.
NOISE
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 normal weekdays)
|
Continuously in
Leq 5min/Leq 30min (average of 6 consecutive Leq 5min)
|
Leq 30min
L10 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
|
