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 commenced on 9 November 2020. Demolition of
existing YLSTW for construction of new treatment facilities are in progress.
1.1.3
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.
1.1.4
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.
1.1.5
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.
1.1.6
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.
1.1.7
This is the 45th
Monthly EM&A report to document the findings of site inspection activities
and EM&A programme for this project from 1 December
2024 to 31 December 2024 (reporting period) and is submitted to fulfil
Condition 3.4 of the EP and Section 12.4.1 of the EM&A Manual. According to
Condition 4 of the EP, electronic reporting is provided on the internet website
to facilitate public inspection of the report.
1.2.1
The Project Organization structure is shown in Appendix B. The key personnel contact names and numbers are summarized in Table 1.
1.3
Construction Programme and Activities
1.3.1
The construction programme
of this project is shown in Appendix A.
1.4
Works undertaken during the month
1.4.1
The main construction works carried out in the reporting period were as
follow:
·
Fixing GRC panel at CLP Substation
·
ELS works and pipeworks at emergency bypass chamber
·
ABWF, E&M work and RC
structure at IW
·
ABWF and E&M works at PST
·
ELS work at SDB
·
External works at site-wide of
predrilling at walkway and water meter cabinet
·
ELS work at AGS
·
ELS work at TTS
·
RC Structure at STB
·
Demolish Existing SDT 1-4
·
ELS work at Sludge Digester no.
1-3
·
E&M work at Biogas Holder
no. 1
1.4.2
ELS works at emergency bypass
chamberThe
environmental mitigation measures corresponding to the main construction works implemented in the
reporting period can be referred to Appendix
J.
1.5
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.