This Monthly Environmental Monitoring and Audit (EM&A) Report is prepared for Contract No. SPW 01/2025 “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 61st Monthly EM&A Report for the construction phase which summaries findings of the EM&A programme during the reporting period from 1 April 2026 to 30 April 2026. As informed by the Contractors, major activities in the reporting month were:
Contract
DC/2019/10:
· Fixing GRC panel at CLP Substation
· Construction of Existing Inspection Chamber and Inlet Effluent Pipes from Nam Sang Wai Sewage Pumping Station
· ABWF and T&C Works at IW
· ELS works at PST Stage 2
· RC works at SDB
· ELS works at ADB and Underpass
· RC works at AGS
· RC structure at TTS
· Driven H-Pile works at ADB
· ABWF and E&M works at STB
· ELS work at Sludge Digester no. 4 -6 and UC4
· E&M wok at Sludge Digester no. 1-3
· Water test and rectification work at Sludge Digester no. 1-3
· E&M work at Biogas Holder no.2
· Disposal of construction waste as indicated in Appendix I.
Contract
DE/2020/01:
· No site works in May
· 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”, “SAS Thickener House-2”and “Screening Press House” were
submitted to EPD respectively on 1st November 2021, 23rd
November 2021, 29th April 2022, 6th July 2022, 19th
June 2023 and 29th October 2024. No contaminated soil and ground
water was found within the Main Storeroom & Workshop, Mechanical Workshop,
Waste Storage Area, SAS Thickener House-1, SAS Thickener House-2 and Screening
Press House, 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:
Contract DC/2019/10:
· Fixing GRC panel at CLP Substation
·
Pipe
works for Modification of Existing Inspection Chamber and Inlet Effluent Pipes
from Nam Sang Wai Sewage Pumping Station
·
ABWF
and E&M works at IW (Remaining area)
·
ELS
and RC works at PST Stage 2
·
RC
work at SDB
·
ELS
work at Underpass
·
Driven
H-Pile works at ADB
·
External
UU works at site-wide
·
RC
structure at AGS and Water Tightness Test
·
RC
structure at TTS and Water Tightness Test and AWBF Works
·
ABWF, E&M
and T&C work at STB
·
ELS
work at UC2 and UC3
·
E&M, Water
Tightness Test and Lining work at Sludge Digester no. 1-3
·
RC work
at PP1
·
ELS work
at Sludge Digester no. 4-6 and UC4
·
E&M
work at Biogas Holder no. 2 & 3
Contract
DE/2020/01:
· Installation of PV panels and earth mat