Agreement No. CE 4/2009 (EP)
Environmental Monitoring and Audit
for Contaminated Mud Pit at Sha Chau
(2009-2013) - Investigation
41st
MONTHLY PROGRESS REPORT FOR CONTAMINATED MUD PITS AT SHA CHAU November 2012
¡P Capping was being undertaken at CMP IVc;
¡P Disposal of contaminated mud was taking place at
CMP Va; and
¡P The dredging of CMP Vd was in progress.
This Monthly
Progress Report covers the monitoring period of November 2012.
¡P Routine
Water Quality Monitoring was
conducted on 5 November 2012;
¡P Water
Column Profiling was conducted
on 6 November 2012;
¡P Impact
Water Quality Monitoring during Dredging Operations was conducted on 7 November
2012; and
¡P Pit
Specific Sediment Chemistry was
conducted on 8 November 2012.
Table 1.1 Monitoring
activities in November 2012
Monitoring
activities |
Date of
Monitoring |
Monitoring results presented in this report? |
Routine Water Quality
Monitoring for CMP Va |
5 November 2012 |
Yes |
Water Column Profiling for
CMP Va |
6 November 2012 |
Yes |
Impact Water Quality
Monitoring during Dredging Operations of CMP Vd |
7 November 2012 |
Yes |
Pit Specific Sediment
Chemistry Monitoring for CMP Va |
8 November 2012 |
No.
Laboratory analysis yet to be completed during preparation of this
monthly report. |
In-situ Measurements
Laboratory Measurements for Suspended Solids (SS)
In-situ Measurements
Laboratory Measurements
Table 1.2 In-situ Monitoring
Results for Routine Water Quality Monitoring during November 2012
Stations |
Temp |
Salinity |
Turbidity |
pH |
Dissolved Oxygen |
|
|
(¢XC) |
|
(NTU) |
|
(%) |
(mg L-1) |
RFE (Reference) |
24.86 |
29.05 |
6.89 |
7.53 |
90.06 |
6.33 |
IPE (Impact) |
24.96 |
29.84 |
9.57 |
7.67 |
88.10 |
6.15 |
INE (Intermediate) |
25.04 |
29.78 |
9.02 |
7.48 |
86.54 |
6.03 |
Ma Wan Station |
25.09 |
30.74 |
6.04 |
7.54 |
84.74 |
5.88 |
WQO |
N/A |
26.15-31.96 |
N/A |
6.5-8.5 |
N/A |
>4 |
Note: # Not
exceeding 10% of natural ambient level which is the result obtained from the
Reference Station. |
Table 1.3 Laboratory
Results for Routine Water Quality Monitoring during November 2012
Stations |
As (µg/L) |
Ag (µg/L) |
Cd (µg/L) |
Cr (µg/L) |
Cu (µg/L) |
Hg (µg/L) |
Pb (µg/L) |
Ni (µg/L) |
Zn (µg/L) |
NH3-N (mg/L) |
TIN (mg/L) |
BOD5 (mg/L) |
SS (mg/L) |
RFE |
1.96 |
<LOR |
<LOR |
0.67 |
10.58 |
<LOR |
1.29 |
3.08 |
19.50 |
0.04 |
0.55 |
1.24 |
13.75 |
IPE |
2.00 |
<LOR |
<LOR |
1.15 |
5.67 |
<LOR |
0.88 |
2.25 |
7.38 |
0.04 |
0.46 |
0.91 |
16.38 |
INE |
2.08 |
<LOR |
<LOR |
0.63 |
6.96 |
<LOR |
0.90 |
2.04 |
11.50 |
0.05 |
0.49 |
1.00 |
15.46 |
Ma Wan Station |
1.88 |
<LOR |
<LOR |
1.00 |
5.50 |
<LOR |
1.19 |
2.25 |
15.50 |
0.06 |
0.39 |
1.51 |
13.50 |
WQO of SS |
15.34 |
CMP V
¡P
Pit Specific Sediment Chemistry for CMP Va;
¡P
Cumulative Impact Sediment Chemistry for CMP Va;
¡P
Water Column Profiling for CMP Va; and
¡P
Impact Water Quality Monitoring during Dredging
Operations for CMP Vd.
A summary of the Study Programme is presented in Annex D.
([1]) ERM (2009) Baseline Monitoring Report. Environmental Monitoring and Audit for
Contaminated Mud Pit at Sha Chau (2009-2013) ¡V Investigation. Agreement No. CE 4/2009(EP). Submitted to EPD in
September 2009.