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 layout for construction of Yuen
Long Effluent Polishing Plant (hereinafter referred as “the Project”) 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. The updated construction programme was
presented in Appendix K.
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”).
1.2.1
This
purpose of this baseline report is to determine the ambient conditions of the
air quality, water quality and the noise levels, and to establish the Action
Levels (AL) and Limit Levels (LL) for impact monitoring during the Project
implementation period. This report presents the baseline monitoring
requirements, methodologies and results of baseline measurements in accordance
with the requirements of the approved EM&A Manual and as stipulated in the
Environmental Permit (EP) (EP No. EP-565/2019).
1.2.2
The
baseline monitoring for air and noise were conducted between 1 December and 14
December 2020. The baseline monitoring for water was conducted between 1
December and 26 December 2020.