11.0
Conclusions and
recommendations
Conclusions
Impact
monitoring of air quality and noise were carried out at designated locations in
accordance with the EM&A Manual in this reporting month.
According to the
summary of air monitoring results, no exceedances of Action and Limit Level of
24-hour and 1-hour TSP monitoring results were recorded during the reporting
month.
Impact noise level monitoring was performed on 02 March
2006. The noise level measured at the monitoring station complied with the
Limit Level of 75dB(A). No complaint was received regarding noise issue.
According to the summary of marine water monitoring results, one exceedance of Turbidity on Action Level at Monitoring Stations M4 was recorded at 29 March 2006 (mid-ebb). According to the site observation, no abnormal site activities were observed at the Fill Bank. As there was no sediment plume observed from the Fill Bank and no wastewater discharge was noted from the Fill Bank and the TKO Basin, the exceedance was considered not due to the Fill Bank. The exceedance might be due to natural fluctuation of Turbidity in the water body around the area. Hence, no further actions were required.
According to the ET weekly site inspections and
IEC site audits carried out in this reporting month, it indicated that site
practices of the Contractor were generally undertaken in an environmentally
acceptable manner. The Contractor generally implemented sufficient dust
mitigation measures, including operation of the mist spraying systems and
automatic wheel washing facilities, dampening of haul roads and stockpiling
areas. However, the silt curtain enclosed the Marine Barging Area was found damaged
during the site inspections. The Contractor should repair it immediately.
No prosecutions or notifications of summons were
received in this reporting month.
One complaint was received from Public through EPD on 27
March 2006, concerning the dust and debris on Wan Po Road near TVB City Caused
by dump trucks from CEDD site. In the response to the complaint, ET undertook a
site investigation as stipulated in the EM&A manual. According to the site
investigation, it confirmed that mitigation measures such as providing the
wheel washing facilities, cleaning and watering the site regularly had been
implemented by the Contractor. No violation relating to the depositing of
debris and mud on haul road near the exit point and public road (e.g. Wan Po
Road) was observed from the Fill Bank vehicles during the site investigation.
Hence, it was concluded that the complaint was not related to the operation of
Fill Bank and no further action was required to be implemented. At the same
time, it was believed that traffic other than Fill Bank (such as dump tracks
from the Construction Waste Sorting Facility) may have deposited the mud and
debris onto the road surface as they traveled on Wan Po Road. This was reported
to have been observed by the Contractor during an inspection of Wan Po Road
after the complaint was received. Although the complaint was not related to the
operation of Fill Bank, the Contractor was still reminded to arrange road
sweeper to carry out routine cleaning the haul road and the public roads outside
the Fill Bank including the section of Wan Po Road nearby the TVB City. Ad-hoc
additional cleaning may be required if necessary. Since the investigation
report was still being prepared at the end of the reporting month, it will be
submitted to relevant parties in the coming month.
Recommendations
According to the environmental site inspections performed in
the reporting month, the following recommendations were provided:
Air Quality
§
Ensure the frequency of water spraying on haul roads,
unloading areas and stockpiles to be sufficient to suppress the dust sources;
§
Provide proper maintenance for the powered mechanical
equipment and barges to avoid emission of dark smoke;
§
Provide water spraying onto the truckloads during inspection
of fill material;
§
Conduct road sweeping on the public road and the main haul
roads outside and near the site egress by the road sweeper. Undertake water
spraying on stockpiling area by water bowers;
§
Erect adequate speed limit signs to advise the truck drivers
of the speed limit;
§
Operate mist spraying systems and automatic water sprinklers
in the Fill Bank;
§
Implement the dust mitigation measures for the construction
activities;
§
Designate proper haul roads to ensure effective water
spraying; and
§
Ensure all vehicles to be washed before leaving the site
egress b provision, operation and maintenance of automatic wheel washing
facilities.
Noise
§
Conduct noisy activities at a farther location from the
NSRs.
Water Quality
§
Maintain the drainage system, including the trapezoidal
channels, permanent desilting chambers, DP3 & DP4 regularly;
§
Operate and maintain the silt curtains regularly;
§
Operate the cleaning vessel within the TKO Basin regularly;
§
Provide proper treatment for the oil discharge from the area
near air monitoring station AA1;
§
Clean up the fill material on the concrete pavement at BHA
frequently; and
§
Remove the stagnant water or provide pesticide for the
stagnant water in the permanent desilting chambers, if any.
Chemical and Waste Management
§
Remove waste materials from the site to avoid accumulation
regularly;
§
Handle and store chemical wastes properly;
§
Remove unwanted material in the existing stockpiles and
avoid further dumping of such material;
§
Provide and maintain sufficient drip trays for diesel drums,
chemical containers, chemical waste storage drums and diesel operated generator
set;
§
Maintain mesh screen on top of the additional drainage, DP3
to avoid improper dumping of rubbish;
§
Maintain good housekeeping at the workshop area;
§
Ensure sufficient tarpaulin sheets are provided to cover
drip trays; and
§
Avoid soil being polluted during oil filling and equipment
maintenance; hence, properly remove and store the contaminated soil, if any.
§
Provide hydroseeding on the exposed slopes, on which the
final profile has been formed;
§
Erect all the site hoarding / chaining fences in accordance
with agreed design at proper location; and
§
Maintain the hydroseeded slopes in accordance with the
Landscape Plan.