This Monthly Environmental Monitoring and Audit (EM&A) Report is prepared for Contract No. SPW 02/2023 “Environmental Team for Construction of Yuen Long Effluent Polishing Plant Stage 1”. Drainage Services Department (DSD) has appointed Aurecon Hong Kong Limited (Aurecon) to undertake the Environmental Team services for the project and implement the EM&A works.
This is the 32th Monthly EM&A Report for the construction phase which summaries findings of the EM&A programme during the reporting period from 1 November 2023 to 30 November 2023. As informed by the Contractor, major activities in the reporting month were:
· Ground investigation at SDB, AGS & TTS
· ABWF and E&M works at CLP substation
· ELS work and RC structure at IW & PST
· Driven pile works at SDB
· Installation of King Post at AGS
· Installation of observation wells and dewatering well at AGS
· ELS work at AGS
· Demolition of underground structure at Aeration Tank no. 5-8
· Demolition of underground structure at pump room of AFT
· Installation of King post at TTS
· Installation of observation wells and dewatering well at TTS
· ELS work and RC construction at Biogas Holder no. 1
· Sheet piling work around Sludge digester no. 1-3
· Installation of sheet pile at STB
· Disposal of construction waste as indicated in Appendix I.
Breaches of Environmental Quality Performance Limits (AL levels)
No Action and Limit Level exceedance was
recorded for air quality monitoring and construction noise monitoring in the
reporting month.
No Action and Limit Level exceedance was
recorded for water quality monitoring in the reporting month.
No Action / Limit exceedance was
recorded for noise levels at stations (NMS1 and NMS2) in close proximity to the
two active ardeid night roosts (ANR1 and ANR2) observed within the Survey Area
during the reporting month.
No Action / Limit exceedance for the
ecological monitoring of birds in the reporting month.
No corrective actions were required
according to the Event and Action Plans for the Monitoring Parameters.
Land Contamination
Regular site
inspection was carried out to ensure the recommended mitigation measures are
properly implemented. The signed final Contamination Assessment Report (CAR)
for “Main Storeroom & Workshops”, “Mechanical Workshop”, “Waste Storage
Area”, “SAS Thickener House-1” and “SAS Thickener House-2” were submitted to
EPD respectively on 1st November 2021, 23rd November 2021, 29th April 2022, 6th
July 2022 and 19th June 2023. No contaminated soil and ground water was found
within the Main Storeroom & Workshop, Mechanical Workshop, Waste Storage
Area, SAS Thickener House-1 and SAS Thickener House-2, and no remedial action
is required for these locations.
Complaint Log
No
complaints were received in the reporting period.
Notifications of Summons and Successful Prosecutions
No
notifications of summons and successful prosecutions were received in the
reporting period.
Reporting Change
There were
no reporting changes during the reporting month.
Future Key Issues
The main
works will be anticipated in the next three months are as follow:
·
Ground investigation at SDB, AGS &
TTS.
·
Ground investigation and footing
construction works at Walkway (Portion 5)
·
ABWF work and fixing GRC panel at CLP
Substation
·
ELS work, ABWF works and RC structure at
IW & PST
·
Installation of King Post at AGS
·
Installation of 813mm pipe pile at North
near West of AGS
·
Installation of observation wells and
dewatering well at AGS
·
Erection temp. loading platform at AGS
·
ELS work at AGS
·
Installation of Sheet pile at TTS
·
Installation of King post at TTS
·
Installation of observation wells and
dewatering well at TTS
·
Erection temp. loading platform at TTS
·
ELS work at TTS
·
Demolition of Mixed Liquor Distribution
& sludge Draw-off Chamber at FST no. 5-8
·
Driven pile works at STB (17nos.)
·
Installation of sheet pile at STB
·
ELS work at STB
·
Installation of observation wells and
dewatering well at STB
·
ELS and construction of UC no.5
·
Sheet piling work around Sludge digester
no. 1-3
·
ELS work at Sludge Digester no. 1-3
·
Installation of observation wells and
dewatering well at Sludge Digester no. 1-3
·
Installation of sheet pile at Biogas
Holder no. 1
·
ELS work at Biogas Holder no. 1
·
Driven pile works at UC (24nos.) near
SDB
·
Construction of temp. haul road in front
of central Control Room
·
Installation of 5T Electric Overhead
Travelling (EOT) crane in Primary Sedimentation System
·
Installation of Inclined Plate Settlers,
Supporting Beams and Accessories in Primary Sedimentation System
·
Installation of BS Equipment at 11kV CLP
Transformer Room