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.
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.
1.1.4
Fugro
Technical Services Limited (FTS) 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
No. DC/2019/10 Yuen Long Effluent Polishing Plant -Main Works for Stage 1
(hereinafter referred as “the Contract”).
1.1.5
This
is the 4th Monthly EM&A report to document the findings of site inspection
activities and EM&A programme for this project from 1 July 2021 to 31 July 2021
(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.
1.3
Construction
Programme and Activities
1.3.1
The
site layout plan of the project is shown in Figure 1.
1.3.2
The
construction programme of this project is shown in Appendix A.
1.4.1
The
main construction works carried out in the reporting period were as follow:
·
Pre-drill
work at Primary Sedimentation Tanks (PST) by 3 drill rigs;
·
Site
formation works at Primary Sedimentation Tanks (PST) no. 7 & 8;
·
Breaking
of Primary Sedimentation Tanks (PST) no. 8;
·
Sheet
pile installation works for Zone 2A diversion;
·
Driven
H-pile at Inlet Works (IW) stage 1, 2 and Primary Sedimentation
Tanks by 3
rigs;
·
Demolition
of workshop and changing room by crusher and breaker;
·
Demolition
of carparks
·
Trial
pit for Zone 2B & 3 diversion;
·
Removal
of sludge from sludge holding tanks; and
·
Overhaul
work at Final Sedimentation Tanks (FST).
1.4.2
The
environmental protection and mitigation measures corresponding to the main
construction works implemented in the reporting period can be referred to Appendix J.
1.5.1
A
summary of the relevant permits, licenses and/or notifications on environmental
protection for this project is presented in Table 1.2.