Agreement No. CE 23/2012 (EP)
Environmental Monitoring and Audit
for Contaminated Mud Pits at the South of The Brothers
and at East Sha Chau (2012-2017) -
PROGRESS REPORT FOR NOVEMBER 2012
Since early 1990s, contaminated
sediment () arising from
various construction works in Hong Kong has
been disposed of at a series of seabed pits at East of Sha Chau (ESC). In late 2008, a review indicated that
the existing and planned facilities at ESC would not be able to meet the
disposal demand after 2012. In
order to meet this demand, the Hong Kong Special Administrative Region
Government (HKSARG) decided to implement a new contained aquatic disposal
(CAD) () facility at the
South of The Brothers (SB CMPs) (hereafter referred to as ížthe ProjectíĘ) which
had been under consideration for a number of years.
The environmental acceptability of the
construction and operation of the Project had been confirmed by findings of the
associated Environmental Impact Assessment (EIA) study completed in 2005 under Agreement No. CE 12/2002(EP) (). The Director of Environmental Protection
(DEP) approved this EIA report under the Environmental Impact Assessment
Ordinance (Cap. 499) (EIAO) in September
Register No.: AEIAR-089/2005).
In accordance with the EIA
recommendation, prior to commencement of construction works for the SB CMPs,
the Civil Engineering and Development Department (CEDD) undertook a detailed
review and update of the EIA findings for the SB site (). Findings of the EIA review undertaken in
2009/ 2010 confirmed that the construction and operation of the SB site had
been predicted to be environmentally acceptable.
Permit (EP-427/2011) was issued by the Environmental
Protection Department (EPD) to the CEDD, the Permit Holder, on 3 November 2011
and varied on 23 December 2011 (EP-427/2011/A). Under the requirements of Condition 4 of
the EP (EP-427/2011/A), an
Environmental Monitoring and Audit (EM&A) programme as set out in the
EM&A Manual is required to be implemented for the SB CMPs. The present EM&A
programme undertaken under Agreement No. CE 23/2012 (EP)
covers the dredging, disposal and capping operations for the SB CMPs.
This Monthly Progress Report covers the
EM&A activities for the reporting month of
of Study Activities
Study activities conducted during this monthly period are listed below:
íP The Revised Updated EM&A Manual for SB CMPs was submitted to EPD on
9 November 2012; and
The 2nd Monthly
Progress Report for Contaminated Mud Pits (CMPs) to the South of The Brothers
and at East Sha Chau -
October 2012 was submitted to EPD on 14 November 2012; and
íP The construction works of SB
CMPs commenced on 24 November 2012 ().
of Sampling and Laboratory Testing Activities
Dredging works at
SB CMPs were commenced on 24 November 2012. Subsequently, Impact
Water Quality Monitoring during Dredging Operations of CMP 1 was conducted on 24, 27 and 29 November 2012 in this reporting month.
No outstanding sampling and laboratory analysis remained from November 2012. A summary of field activities are
presented in Annex A.
All monitoring data collected for
SB CMPs in November 2012 will be presented in this monthly report. Detailed discussion will be presented in
the corresponding Quarterly Report.
Impact Water Quality Monitoring during Dredging Operations of CMP 1 íV
Impact Water Quality Monitoring during Dredging
Operations of CMP 1 was conducted on 24, 27 and 29
November 2012. On the survey day,
sampling was conducted during both mid-ebb and mid-flood tides at two Reference
(Upstream) stations upstream and five Impact (Downstream) stations downstream
of the dredging operations at CMP 1.
Monitoring was also conducted at five Sensitive Receiver Stations (Ma
Wan, Shum Shui Kok, Tai Mo To and Tai Ho Bay). Locations of the twelve sampling
stations are shown in Figure
It should be noted that monitoring
was only conducted during the mid-flood tide on 24 November 2012 as no dredging
works were being undertaken during the mid-ebb tide. In addition, on 24 November 2012 the
Impact station DS2 was located within the construction site of the Hong Kong
Boundary Crossing Facilities of Hong Kong- Zhuhai-Macao Bridge (HKBCF facility)
and thus sampling could not be undertaken for this station.
Monitoring results are presented in
B1 of Annex
of Dissolved Oxygen (DO), Turbidity and Suspended Solids (SS) complied with the
Action and Limit Levels set in the Baseline Monitoring Report ().
Overall, the results indicated that
the dredging operations at CMP 1 of SB did not appear to cause any unacceptable
deterioration in water quality during this reporting period. Therefore, no further mitigation
measures, except for those recommended in the Environmental Permit (EP-427/2011/A), are considered necessary for the dredging operations.
Scheduled for the Next Month
Impact Water Quality Monitoring during Dredging
Operations for CMP 1 will be conducted three times per
week in the next monthly period of December 2012. The sampling schedule is presented in Annex A.
A summary of the Study programme is
presented in Annex C.