Agreement No. CE 4/2009 (EP)
Environmental Monitoring and Audit
for Contaminated Mud Pit at Sha Chau
(2009-2013) - Investigation
3rd
MONTHLY PROGRESS REPORT FOR CONTAMINATED MUD PITS AT SHA CHAU - September 2009
1.1
Overview of Study Activities
Study activities conducted
during this monthly period are listed below:
· The Final 1st Monthly Progress
Reports for Contaminated Mud Pits (CMPs) at Sha Chau - July 2009 and for East Tung Lung Chau
(ETLC) Disposal Facility – July 2009 were
submitted to CEDD on 10 September 2009;
· The Draft 2nd Monthly Progress
Reports CMPs at Sha Chau - August 2009 and for ETLC Disposal Facility – August 2009 were submitted to CEDD on
22 September 2009;
· The Final Operations Manual, Final Inception
Report and Final 1st Review of the EM&A Manual were
submitted to CEDD on 29 September 2009; and,
1.2
Details of Sampling and
Laboratory Testing Activities
Field sampling activities conducted in this monthly period are listed
below:
· Sampling for Sediment Chemistry Monitoring after a Major
Storm Event for CMP IV was conducted on 19 September 2009;
· Sampling for Impact Monitoring during Dredging Operations
of CMP V was conducted on 14, 22 and 24 September 2009; and,
· Water Column Profiling for CMP V was conducted on
23 September 2009.
1.3
Details of Outstanding
Sampling and / or Analysis
No outstanding sampling
remained from September 2009. A summary
of field activities are presented in Annex A.
1.4
Brief Discussion of the
Monitoring Results
For CMP IV, there are no monitoring results to report during this
monthly period. For CMP V, monitoring
results for Impact Monitoring during
Dredging Operations of CMP V are presented below. Detailed results will be discussed in the
relevant Quarterly Reports.
1.4.1
Impact Monitoring during Dredging Operations of CMP V
– September 2009
Impact
Monitoring during Dredging Operations of CMP V was conducted on 14, 22 and
24 of September 2009. Monitoring was
conducted during both mid-ebb and mid-flood tides (except for 14 September in
which monitoring was conducted during mid-ebb tide only due to adverse sea
conditions during mid-flood tide) at two Reference (Upstream) stations upstream
and five Impact (Downstream) stations (except for 14 September during which one
Impact station was not monitored as it was within the restriction zone of the
Hong Kong International Airport) downstream of the dredging operations at CMP
V. Monitoring was also conducted at the
Ma Wan station. At each station, in-situ measurements of water quality
parameters and water samples were taken from three water depth levels of the
water column which were surface (1m below sea surface), mid-depth and bottom (1m
above the seabed).
Monitoring results are presented in Figures 1 to 12 of Annex B. Levels of DO (bottom level and surface
and mid depths), depth-average Turbidity and TSS compiled with the Action and Limit
Levels set in the Baseline Monitoring
Report ([1])
(Tables B1
to B5 of Annex B).
Overall, the dredging
operations conducted at CMP V did not appear to cause any adverse impacts to
water quality during this reporting monthly period.
1.5
Activities Scheduled for the
Next Month
Impact
Monitoring during Dredging Operations will be conducted for CMP V
in the next monthly period. No sampling
works will be conducted for CMP IVc. The sampling schedule for the Monitoring Contract is presented in Annex A.
1.6
Study Programme
A summary of Study programme is presented in Annex C.