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.

 



 

([1]) ERM 2009. Baseline Monitoring Report. Environmental Monitoring and Audit for Contaminated Mud Pit at Sha Chau (2009-2013) Investigation. Agreement No. CE 4/2009(EP). Submitted to CEDD.