1
INTRODUCTION
1.1.1
The existing Yuen Long Sewage Treatment Works (YLSTW) is a secondary
sewage treatment works, located at Yuen Long Industrial Estate serves Yuen Long
Town, Yuen Long Industrial Estate and Kam Tin areas with a design capacity of
70,000 m³ per day. Based on the latest planning data, the volume of sewage
generation from the YLSTW catchment is estimated to increase to 150,000 m³ per
day after 20 years. In addition, since YLSTW has been operating for over 30
years and most of its facilities are of out-dated design and reaching the end
of their design life, the environmental facilities of the plant will also be
upgraded and hence improving the adjacent environment through upgrading the
YLSTW to Yuen Long Effluent Polishing Plant (YLEPP). The Location of Proposed
Yuen Long Effluent Polishing Plant is given in Figure 1.
1.1.2
YLSTW will be reconstructed in two stages to increase its capacity to 150,000
m³ per day. The proposed works, as Stage 1 of the project, will firstly
increase the treatment capacity to 100,000 m³ per day. In the
course of Stage 1 construction, about half of the existing facilities of
YLSTW would be demolished, while the other half would be kept in operation to
maintain the sewage treatment service for Yuen Long area. This 72-month works
contract (Contract DC/2019/10) commenced on 9 November 2020. Demolition of
existing YLSTW for construction of new treatment facilities are in progress.
1.1.3
Under Contract DE/2020/01, this 54-month works contract commenced on 13
June 2022. Design and installation of E&M system, and the supply and
installation of PV panels are in progress.
1.1.4
The Project is a designated project under Schedule 2 of the
Environmental Impact Assessment Ordinance (EIAO) (Cap. 499) for which
Environmental Impact Assessment (EIA) report and Environmental Monitoring and
Audit (EM&A) Manual was approved by EPD (Register No.: AEIAR-220/2019) on
25 April 2019. The Environmental Permit (EP) (EP No. EP-565/2019) was issued by
EPD on 26 April 2019. Variation of the Environmental Permit (EP) (EP No.
EP-565/2019/A) was issued by EPD on 26 November 2024.
1.1.5
Fugro Technical Services Limited was appointed as the Environmental Team
(ET) by Drainage Services Department (DSD) to undertake the Environmental Team
services for the Project and implement the EM&A works under the Contract
No. DC/2019/10 Yuen Long Effluent Polishing Plant -Main Works for Stage 1
(hereinafter referred as “the Contract”) for the period from July 2020 to 6
July 2023.
1.1.6
Aurecon Hong Kong Limited (Aurecon) has been appointed as the
Environmental Team (ET) by Drainage Services Department (DSD) to undertake the
Environmental Team services for the Project and implement the EM&A works
under the Contract from July 2023. Air quality, noise, water quality and ecological
monitoring, site inspections and auditing (as scheduled) under EM&A
programme with effect from 7 July 2023 was conducted by Aurecon. Aurecon is
undertaking the preparation (including reporting of monitoring results),
certification by ET Leader and submission of this report to EPD.
1.1.7
All ET roles and responsibilities under the EP for this Project were
undertaken by Fugro up to 6 July 2023 and by Aurecon with effect from 7 July
2023. Air quality, noise, water quality and ecological monitoring, site inspections
and auditing (as scheduled) under EM&A programme up to 6 July 2023 was
conducted by Fugro, and the corresponding monitoring results were shared with
Aurecon for the purposes of reporting in this report.
1.3
Project Organization
1.2.1
The Project Organization structure is shown in Appendix B. The key personnel contact names and numbers are summarized in Table 1.
1.4
Construction Programme and Activities
1.3.1
The construction programme
of this project is shown in Appendix A.
1.5
Works undertaken during the month
1.4.1
The main construction works carried out in the reporting period were as
follow:
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 work 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
Contract
DE/2020/01:
· No site works in June
1.4.2
The environmental mitigation measures corresponding to the main
construction works implemented in the
reporting period can be referred to Appendix
J.
1.6
Status of Environmental Licences, Notification and
Permits
1.5.1
A summary of the status of the relevant permits, licenses and/or
notifications on environmental protection for this project is presented in Table 2.