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 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 9th 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 March to 31 May 2022.
A4. The EM&A programme for this contract has covered environmental monitoring on construction noise level at selected NSRs and
Contractor’s environmental performance auditing in the aspects of construction dust, construction noise, water quality, waste management, Landscape and Visual and Ecology.
Summary of Main Works Undertaken & Key Mitigation Measures Implemented
A5. Key
activities carried out
in
this
reporting period for
the
Project
included the followings:
-
Land Survey;
-
Construction of manholes no.15 and no.16 adjacent to ActiDAFF and Reverse Osmosis (RO);
-
Construction of manholes no.2, no.3 and no.4 adjacent to ActiDAFF;
-
Construction of 1/F to 2/F walls and columns of Administration Building;
-
Construction of On-Site Chlorine Generation Building (OSCG Bldg) and CO2 Tank area;
-
Construction of solar panel supports at roof of ActiDAFF;
-
Construction of RO Building - staircases and internal finishing;
-
Construction of sludge thickener, Post Treatment Building (PTB);
-
Construction of reinforced concrete (RC) support of Inspection Corridor;
-
Construction of footings F5 and F6 of inspection corridor;
-
Construction of manholes no.6 and no.7 Glass Reinforced Plastic (GRP) pipe installation;
-
Construction of underground utility adjacent to 132kV Substation;
-
Construction of 132kV adjacent to underground utilities
-
Construction of structural wall and Roof of Chemical Building;
-
Construction of parapet of Chemical Building;
-
Construction of common wall of Combined Shaft;
-
Internal finishing work at Product Water Storage Tank (PWST), Main Electrical & Central Chiller Plant Building;
-
Manhole construction and Glass Reinforced Plastic (GRP) pipe installation;
-
Outfall Shaft - Dewatering; Predrill, Rock cutting and excavations;
-
Intake shaft - Retrieval of DN 2500 TBM under water;
-
Pipe jacking at Combined Shaft for Outfall pipelines;
-
Intake tunnel - Demobilize the pipe jacking system and grouting works commence;
-
Construction of combined shaft and pump room;
-
Slope works - Scaffolding erection for rock mapping and tree survey;
-
Open Channel - Trench Excavation and structure installation;
-
E&M works - ActiDAFF - scaffolding, installation of E&M piping;
-
E&M works -RO Building - Fire services installation;
-
E&M works - CO2 Tank area - installation of silos; and
-
E&M works - Chiller Building - Installation of chillers
A6. The major
environmental impacts brought
by
the
above
construction works include:
-
Construction dust and noise generation from marine construction works, excavation works, excavation works, construction works, rock cutting works and pipe pilling driving works;
- Waste generation from the construction activities
-
Impact on water quality from marine construction works and inland construction works
A7.
The
key
environmental mitigation measures
implemented for the
Project
in
this reporting period associated with the above construction works include:
- Dust suppression by regular wetting and water spraying for construction works;
- Reduction of noise from equipment and machinery on-site and regularly inspection to machinery and plants/vehicles on-site to ensure proper functioning;
- Sorting and storage of general refuse and construction waste; and
- Deployment of temporary silt curtain in the area where marine construction works were conducted and deployment of water sedimentation tanks for treatment of wastewater at inland areas before discharge
Summary of Exceedance & Investigation & Follow-up
A8.
No noise monitoring was conducted during the reporting period since there are no project-related construction activities undertaken within a radius of 300m from the monitoring locations. No exceedance of the Action Level was recorded during the reporting period.
A9. The EM&A works for water quality were conducted during the reporting period in accordance with the EM&A Manual.
A10. Water
quality
monitoring was conducted
as
schedule in the
reporting period. Fifty-six
(56)
action
level
exceedances and thirty
(30)
limit
level
exceedances for suspended solids (SS) of impact water quality monitoring were recorded.
A11. In this reporting period, 88 times of landfill gas monitoring were recorded at Wan Po Road (Ch1+360 - Ch1+513). No action and limit level exceedance for methane, oxygen and carbon dioxide was recorded. Monitoring was conducted during excavations at 1m depth or more within the consultation zone and whenever workers entered the excavation on the day.
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.
Table I Summary Table for EM&A Activities in the Reporting Period
|
EM&A Activities
|
March 2022
|
April 2022
|
May 2022
|
|
Noise Monitoring
|
N/A
|
N/A
|
N/A
|
|
Water Quality Monitoring
|
1, 3, 5, 8, 10, 12, 15,
17, 19, 22, 24, 26, 29
and 31 March 2022
|
2, 5, 7, 9, 12, 14, 16,
19, 21, 23, 26, 28
and 30 April 2022
|
3, 5, 7, 10, 12, 14,
17, 19, 21, 24, 26,
28 and 31 May
2022
|
|
Landfill Gas monitoring
|
N/A
|
1, 2, 4, 6, 7, 8, 9, 11,
12, 13, 14, 19, 20,
21, 22, 23, 25, 26,
27, 28, 29 and 30
April
|
3, 4, 5, 6, 7, 10, 11,
12, 13, 14, 16, 17,
18, 19, 20, 21, 23,
24, 25, 26, 27 and
28 May
|
|
Environmental Site Inspection
|
8, 15, 23 and 30
March 2022
|
6, 12, 19 and 29
April 2022
|
3, 10, 17, 24 and 31
May 2022
|
Table II Summary Table for Exceedance in the Reporting Period
|
Environmental Monitoring
|
Parameter
|
No. of non- Project related
exceedance
|
Total No. of non-Project related exceedance
|
No. of Project related exceedance
|
Total No. of Project related exceedance
|
|
AL
|
LL
|
AL
|
LL
|
|
Noise
|
Leq (30min)
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
N/A
|
|
Water
|
DO
|
0
|
0
|
0
|
0
|
0
|
0
|
|
Turbidity
|
0
|
0
|
0
|
0
|
0
|
0
|
|
SS
|
56
|
30
|
86
|
0
|
0
|
0
|
|
pH
|
0
|
0
|
0
|
0
|
0
|
0
|
|
Salinity
|
0
|
0
|
0
|
0
|
0
|
0
|
|
Landfill Gas
|
O2
|
0
|
0
|
0
|
0
|
0
|
0
|
|
CH4
|
0
|
0
|
0
|
0
|
0
|
0
|
|
CO2
|
0
|
0
|
0
|
0
|
0
|
0
|
Complaint Handling and Prosecution
A14. No
environmental complaint, notifications
of
summons
and
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 Information
1.1.
Background
The 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.
1.2.
The Reporting Scope
This is the
9th Quarterly EM&A Report
for the
Project which summarizes the
key
findings of the EM&A programme during the reporting period from 1 March 2022 to 31 May 2022.
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 (Binnies Hong Kong Limited)
|
Project Manager
|
Christina Ko
|
2608-7302
|
|
Chief Resident Engineer
|
Roger Wu
|
6343-1002
|
|
The Jardine Engineering Corporation, Limited, China State Construction Engineering (Hong Kong) Limited and Acciona Agua,
S.A. Trading
|
Project Manager
|
Stephen Yeung
|
2807-4665
|
|
Environmental Monitoring Manager
|
Brian Kam
|
9456-9541
|
|
Acuity Sustainability Consulting Limited
|
Environmental Team Leader
|
Jacky Leung
|
2698-6833
|
|
ANewR Consulting Limited
|
Independent Environmental Checker (IEC)
|
Louis Kwan
|
2618-2831
|
1.4.
Summary of Construction Works
Details of the major construction activities undertaken in this reporting period are shown as
below. The construction programme is presented in Appendix A.
Key activities
carried
out
in
this
reporting period for
the
Project
included the following:
-
Land Survey;
-
Construction of manholes no.15 and
no.16 adjacent to ActiDAFF and Reverse Osmosis (RO);
-
Construction of manholes no.2, no.3
and no.4 adjacent to ActiDAFF;
-
Construction of 1/F to 2/F walls
and columns of Administration Building;
-
Construction of On-Site
Chlorine Generation Building (OSCG Bldg) and CO2 Tank
area;
-
Construction of solar panel supports
at roof of ActiDAFF;
-
Construction of RO Building - staircases
and internal finishing;
-
Construction of sludge thickener,
Post Treatment Building (PTB);
-
Construction of reinforced concrete
(RC) support of Inspection Corridor;
-
Construction of footings F5 and
F6 of inspection corridor;
-
Construction of manholes no.6 and
no.7 Glass Reinforced Plastic (GRP) pipe installation;
-
Construction of underground utility
adjacent to 132kV Substation;
-
Construction of 132kV adjacent to
underground utilities
-
Construction of structural wall
and Roof of Chemical Building;
-
Construction of parapet of Chemical
Building;
-
Construction of common wall of Combined
Shaft;
-
Internal finishing work at Product
Water Storage Tank (PWST), Main Electrical & Central Chiller Plant Building;
-
Manhole construction and Glass Reinforced
Plastic (GRP) pipe installation;
-
Outfall Shaft - Dewatering; Predrill,
Rock cutting and excavations;
-
Intake shaft - Retrieval of DN 2500
TBM under water;
-
Pipe jacking at Combined Shaft for
Outfall pipelines;
-
Intake tunnel - Demobilize the pipe
jacking system and grouting works commence;
-
Construction of combined shaft and
pump room;
-
Slope works - Scaffolding erection
for rock mapping and tree survey;
-
Open Channel - Trench Excavation
and structure installation;
-
E&M works - ActiDAFF - scaffolding, installation of E&M piping;
-
E&M works - RO Building - Fire
services installation;
-
E&M works - CO2 Tank area -
installation of silos; and
-
E&M works - Chiller Building
- Installation of chillers
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
|
|
Environmental Permit
|
FEP - 01/503/2015/A
|
Throughout the Contract
|
|
Notification of Construction Works under
the Air Pollution Control (Construction Dust) Regulation (Form NA)
|
Ref. No.: 451539
|
-
|
|
Billing Account for Disposal of Construction Waste
|
7036276
|
Throughout the Contract
|
|
Chemical Waste Producer Registration
|
5213-839-A2987-01
|
Throughout the Contract
|
|
Wastewater Discharge Licence (Land and Marine works)
|
WT00035775-2020
|
24/07/2020 -
31/07/2025
|
|
Construction Noise Permit (24 hours) - CNP for general works, TBM at Combined
Shaft and marine works
|
GW-RE1041-21
|
01/11/2021 -
30/04/2022
|
|
Construction Noise Permit for general
works, TBM at combined shaft and marine works
|
GW-RE0337-22
|
01/05/2022-
31/10/2022
|
|
Vessel CHITs for fill disposal
|
7039300
|
20/01/2022 -
20/04/2022
|
The status for
all
environmental aspects is
presented in Table 1.3.
Table 1.3 Summary of Status for Key Environmental Aspects under the EM&A Manual
|
Parameters
|
Status
|
|
Water Quality
|
|
Baseline Monitoring under EM&A Manual
|
The baseline water quality monitoring was conducted between 12 May 2020 and 6 June 2020
|
|
Impact Monitoring
|
On-going
|
|
Noise
|
|
Baseline Monitoring
|
The baseline noise monitoring result has been reported
in Baseline Monitoring Report and submitted to EPD under EP Condition 3.4
|
|
Impact Monitoring
|
On-going
|
|
Waste Management
|
|
Mitigation Measures in Waste Management Plan
|
On-going
|
|
Landfill Gas
|
|
Regular Monitoring when Construction Works are within the 250m Consultation Zone
|
In this reporting period, 88 times of landfill gas monitoring were recorded at Wan Po Road (Ch1+360 - Ch1+513). No exceedance of action and limit level for methane, oxygen and carbon dioxide was observed. Monitoring was conducted during excavations at 1m
depth or more within the consultation zone and whenever workers entered the excavation on the day.
|
|
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.
Noise
2.1.
Monitoring Requirements
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.
2.2.
Monitoring Parameters, Frequency and Duration
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
|
2.3.
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
|
2.4.
Action and Limit Levels
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.
Table 2.3 Action and Limit Levels for Construction Noise Monitoring per EM&A Manual
|
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.
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 noise monitoring station was located within a radius of 300m of the Project site as shown in
Figure 2.4, no impact
monitoring for noise impact was
conducted in the reporting period.
Figure 2.4 Site Layout Plan with Noise Sensitive Receivers and Desalination Plant
Water Quality
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.
3.1.
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 measured in the impact monitoring are listed in Table 3.1
Table 3.1 Parameters measured in the impact 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
|
mg/L
|
Fe
|
|
Anti-scalant as Reactive Phosphorus
|
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.
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.
3.2.
Monitoring Locations
The impact water quality monitoring locations in accordance to the EM&A
Manual and detailed in Table 3.2 below.
Table 3.2 Location of Impact Water Quality Monitoring Station
|
Station
|
Easting
|
Northing
|
Description
|
|
CE
|
843550
|
815243
|
Upstream control station at ebb tide
|
|
CF
|
846843
|
810193
|
Upstream control station at flood tide
|
|
WSR1
|
846864
|
812014
|
Ecological sensitive receiver at Tung Lung Chau
|
|
WSR2
|
847645
|
812993
|
Fisheries sensitive receiver at Tung Lung Chau
|
|
WSR3
|
848023
|
813262
|
Ecological sensitive receiver at Tung Lung Chau
|
|
WSR4
|
847886
|
814154
|
Ecological sensitive receiver at Tai Miu Wan
|
|
WSR16
|
845039
|
815287
|
Ecological sensitive receiver at Fat Tong Chau
|
|
WSR33
|
847159
|
814488
|
Ecological sensitive receiver at Tai Miu Wan
|
|
WSR36
|
846878
|
814081
|
Ecological sensitive receiver at Kwun Tsai
|
|
WSR37
|
846655
|
813810
|
Ecological sensitive receiver at Tit Cham Chau
|
|
NF1
|
846542
|
813614
|
Edge of mixing zone, ~ 200m west of outfall diffuser
|
|
NF2
|
846942
|
813614
|
Edge of mixing zone, ~ 200m east of outfall diffuser
|
|
NF3
|
846742
|
813414
|
Edge of mixing zone, ~ 200m south of outfall diffuser
|
Figure 3.1 Impact Water Quality Monitoring
Locations
under
EM&A
Manual
3.3.
Monitoring Equipment, Methodology and QA/QC Procedures
The monitoring methodology, equipment used and QA/QC procedures could be referring to Section 3.1.2 -3.1.4, 3.1.6-3.1.7 and 3.2 of the Monthly EM&A Report.
3.4.
Action and Limit levels
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.
Table 3.3
Derived Action and Limit Levels for Water Quality
|
Parameters
|
Action
|
Limit
|
|
Construction Phase Impact Monitoring
|
|
DO in mg/L
|
Surface and Middle
|
Surface and Middle
|
|
|
7.30 mg L-1
|
4 mg L-1
|
|
|
Bottom
|
Bottom
|
|
|
7.31 mg L-1
|
2 mg L-1
|
|
|
Tung Lung Chau Fish Culture Zone
|
Tung Lung Chau Fish Culture Zone
|
|
|
5.1 mgL-1 or level at control station
|
5.0 mgL-1 or level at control station
|
|
|
(whichever the lower)
|
(whichever the lower)
|
|
SS in
|
mg/L
|
5.00 mg L-1 or 20% exceedance of
|
6.00 mg L-1 or 30% exceedance of
|
|
(Depth-
|
|
value at any impact station compared
|
value at any impact station
|
|
averaged)
|
|
with corresponding data from control
|
compared with corresponding data
|
|
|
|
station
|
from control station
|
|
Turbidity in NTU
|
2.41 NTU or 20% exceedance of value
|
2.84 NTU or 30% exceedance of
|
|
(Depth-
|
at any impact station compared with
|
value at any impact station
|
|
averaged)
|
corresponding data from control
|
compared with corresponding data
|
|
|
station
|
from control station
|
|
First-year Operation Phase Monitoring iv
|
|
DO in mg/L
|
Surface and Middle
|
Surface and Middle
|
|
|
7.30 mg L |
Summary of Monitoring Exceedance, Complaints, Notification of Summons and Prosecutions 26 
