7.0
IEC Site Audit
and Weekly ET Site Inspections
7.1 IEC
Site Audit
7.1.1
During this reporting period, the IEC
team conducted a total of three independent site audits covering the Contract
CV 2005/12 site (Fill Bank at TKO Area 137) and the Contract CV 2004/13 site
(Temporary C&DMSF at TKO Area 137).
7.1.2
Findings of the site audits have been
recorded on site checklists, copies of which were submitted to the Contractor
for their further action as appropriate, and to the Client for their
records. Key issues were highlighted to
the Contractor’s representative at the completion of each site audit to ensure
that they were aware of the problem(s) identified and where necessary, to take
immediate corrective actions. A copy of the completed checklists are appended
to this report in Appendix H.
Table 7.1: Dates of Site Audits in March 2006
|
Date of Audit |
Work Period |
Site Audit
Checklist Submitted Under IEC’s Ref No. |
|
6
March 2006 |
Construction
of C&DMSF |
8116/2458 |
|
16
March 2006 |
Construction
of C&DMSF |
8116/2503 |
|
27
March 2006 |
Operation
of Fill Bank |
8116/2526 |
7.1.3
The major findings recorded during the
site audits conducted during this reporting period are summarized below. Full details are provided in the site audit
checklists presented in Appendix H.
Table 7.2: Key
Findings of Site Audits in March 2006 for Contract No. CV/2005/12
|
Date |
Key Findings |
Action |
|
27
Mar 2006 |
Vegetation was found in the
trapezoidal channel at DP4. The
Contractor should maintain the channel clear so as to ensure efficient flow
of water during rainy season. |
(to be completed by the Contractor – see footnote) |
|
|
Silt was found in the oil collection
sump near site office. Silt should be
removed from the collection sump to ensure effective operation of the system.
|
(to be completed by the Contractor – see footnote) |
|
|
A container-type workshop was
observed near the wheel washing bay and DP3.
Chemical drums and paint cans were placed directly on the ground. Oil film observed on the floor in front of
the workshop. As agreed in the Progress Meeting on 27/3/06, workshop should
be relocated and materials properly stored in drip trays and covered with
tarpaulin if left outdoors. |
(to be completed by the Contractor – see footnote) |
|
|
No covers were provided for the chemical storage drums in the Plant and
Vehicle Maintenance Workshop. A
tarpaulin sheet should be also provided for drums stored outdoors. |
(to be completed by the Contractor – see footnote) |
Note: As at the issue of this report, the Contractor indicated that the actions to address the IEC’s comments were still underway and that a formal response to IEC’s Site Inspection Form dated 27/3/06 will be provided by 21/4/06.
7.1.4
Following from the previous two reporting
periods (January 2006 and February 2006), there were again no air quality
exceedances recorded during this reporting period. Based on observations recorded during site inspections and site
supervision events, the Contractor was observed to have implemented most of
their dust prevention measures during the reporting period. However, on occasion fugitive dust emission
was observed when the trucks were travelling on the main haul road. As such, the CV/2005/12 Contractor was
reminded to ensure that all dust mitigation measures, particularly those near
the site entrance, were operated according to their design merits to ensure
that fugitive dust impacts to neighbouring land users was minimized.
7.1.6
The Contractor was reminded to conduct
regular housekeeping to remove vegetation along the trapezoidal channels; and
the collected silt inside the oil collection sump to avoid blockage of channels
and pits.
7.1.7
During the Progress Meeting this period,
the Contractor agreed to relocate the container-type
workshop found near the wheel washing bay and DP3. The Contractor has been reminded that all chemical drums and
paint cans should be properly stored in drip trays and covered with tarpaulin
if left outdoors.
7.1.8
The silt curtains had been repaired and
considered acceptable. However, the
Contractor was reminded to maintain the silt curtains function properly and
repair once damaged.
7.1.9
The frequency of road / platform watering
was considered to be acceptable in the reporting period. Nevertheless, the Contractor has been
reminded to regularly review the frequency of road watering in light of the
seasonally dry weather conditions in Hong Kong.
7.1.10
A routine site inspection was conducted
by EPD’s representatives on 27 March 2006.
According to the letter reported from the Contractor dated 11 April 2006
(Ref: OPFRF/S/2.00/8.00/L/0135), the EPD’s representatives commented that the
functioning of the wheel washing facilities was satisfactory. However, some dump trucks coming out from
the Construction Waste Sorting Facility (CWSF) using the access road alongside
the northern boundary of the Fill Bank area might carry mud onto Wan Po Road
after turning left to the exist of TKO Area 137. Although the dump trucks were being operated under the CV/2004/13
Contract and carrying mud onto the internal access road and Wan Po Road, the
CV/2005/12 Contractor is still responsible for the clean-up of the road as it
falls within the Contract CV/2005/12 site area and works requirements.
7.1.11
A formal complaint was received by EPD on
27 March 2006 after the aforementioned site inspection regarding the problem of
dust and debris on Wan Po Road near TVB City (for the section outside the Fill
Bank site entrance). In order to
address the complaint, the frequency of road sweeping along the section outside
the site entrance was increased.
Investigation reports were prepared by both the Contractor and ET
reporting the event and proposed remedial measures; and submitted for EPD’s
review (in early April 2006).
7.2 Weekly
ET Site Inspections
Weekly ET site inspections were carried out by ET to monitor the timely implementation of proper environmental pollution control and mitigation measures for the Project. In this reporting month, five weekly site inspections were conducted (02, 08, 14, 20 and 30 March 2006). After each site inspection, the Contractor was notified of the ET’s observations and recommendations. A follow-up action plan detailing the environmental observations had also been prepared by the ET. The Contractor then completed this plan to propose / report their remedial works. The Contractor should also submit the completed the follow-up action report to ET by e-mail. This follow-up action plan submission procedure was adopted for each subsequent ET’s inspection to notify all the relevant parties of the Contractor’s follow up actions. The weekly site inspection reports are attached in Appendix I. Summaries of the weekly site inspection findings in this reporting month are described as follows:
Air Quality
§
The major dust sources were dump truck movement on the
unpaved haul roads and loading & unloading activities on various working
platforms in the Fill Bank. The Contractor deployed water bowsers to dampen the
haul roads and the working platforms;
§
A road sweeper was used to remove settled dust particulates
outside the site egress on Wan Po Road;
§
Several automatic sprinklers served to dampen the haul roads
outside the site office and on the ramp to the stockpiling area;
§
Wheel washing facilities were operating during
weekly site inspections. Besides, the Contractor operated several mist spraying
systems at the site egress and weighbridge respectively. The truckloads were
dampened during inspection of fill material at the CEDD Combined Reception
Office;
§
No potential fugitive dust from vehicle movement
was observed in this reporting month. The Contractor was still reminded to
water the haul road more frequently during dry season;
§
Refer to the previous observation in January
2006, the Contractor had used clean tarpaulin sheets to cover the stockpiles of
sand at DP3 near wheel wash facilities;
§
The dump trucks were operating below the speed limit in the
Fill Bank. There were sufficient speed limit signs on site to advise the
drivers;
§
The fill material was usually dampened on the barge. Dust
impact was minimal from the barge delivery and unloading activity at the BHA;
§
No dark emission was noted from the site machines in the
reporting month. Generally, all the powered mechanical equipment (PME) were
maintained regularly; and
§
Other than the Fill Bank operation, dust sources also
included road paving works of Wan Po Road outside the site egress, operation of
PBR2 at Portion J of the Fill Bank, temp C&DMSF at Portion K, delivery of
rock fill material from the SENT Landfill to the EPD’s barging point and
associated dumping activity, operation of the SENT Landfill, vehicular movement
and wind erosion on Wan Po Road.
Noise
§
The major noise source was dump truck traffic in
the Fill Bank. Since the nearby NSR were remote from the Fill Bank, the noise
impact was minimal. There was no specific observation noted regarding noise
issue.
Water Quality
§
Silt and mud was observed to have accumulated at
the manhole at DP3 during the ET weekly site inspection on 30 March 2006. The
Contractor should clean up the manhole regularly in order to avoid the
accumulation of sand and mud. Since the finding was improved during site
inspection on 04 April 2006, no further action was required to be taken by the
Contractor;
§
The Contractor had replaced the damaged section
of silt curtain at the entrance of the Marine Barging Area with a new one on 25
March 2006. Since the silt curtain was found to have been damaged on several
occasions during the previous site inspections, the Contractor was still
reminded to check the silt curtain carefully and maintain it properly;
§
Fill materials had accumulated on the concrete
embankment at the BHA. The Contractor should clean up the fill materials as
soon as each unloading activity is completed to avoid the fill materials from
being washed into the sea; and
§
Stagnant water was accumulated nearby the BHA
during the ET’s weekly site inspection on 30 March 2006. The Contractor was
reminded to drain the stagnant water away to avoid mosquito breeding. Since
mitigation measure was implemented on 02 April 2006, the finding was closed.
Chemical and Waste
Management
§
The Contractor provided waste skips to collect
general refuse and disposal of them regularly to the SENT Landfill. In this
reporting month, 4.95 tons C&D waste were disposed to SENT Landfill and
400L waste oil was collect by licensed waste collector;
§
The chemical waste was stored in the Chemical
Waste Storage Area (CWSA). The Contractor should dispose chemical wastes
regularly to avoid over accumulation of chemical waste on site;
§
Rubbish was disposed on the ground near Pier
Maintenance Workshop during ET weekly site inspection on 14 March 2006. The
Contractor was reminded to provide waste skips to collect general refuse and
dispose of them regularly to the SENT Landfill. During the subsequent site
inspection, no rubbish was observed on the ground and rubbish bin was provided.
Hence, the finding was improved; and
§
Equipment maintenance was undertaken at the
workshop area. Tarpaulin sheeting and containers should be laid underneath the
equipment undergoing maintenance to collect leaked oil and avoid further
contamination.
Landscape and Visual
§
The germination rate on the hydroseeded panels
at Portion A, B, G, H and I were observed to be satisfactory in this reporting
month. The Contractor was still advised to maintain the panel properly;
§
Sufficient lighting was provided for the Fill
Bank operation in the evening.
Site Practices
§
Sufficient rubbish skips had been provided at
site by the Contractor and the site area was found tidy and clean;
§
The Contractor had provided drip tray for all
generators in order to avoid oil spillage; and
§
No oil leakage from the site machines at
Workshop was observed during the ET weekly site inspection in this reporting
month.
Landfill Gas
§
The registered safety officer carried out
landfill gas monitoring (oxygen, carbon dioxide and methane)
twice per day for each temporary office in this reporting
month;
§
The equipments used in the monitoring have been
calibrated for all these three parameters; and
§
All the monitoring results were satisfactory.
7.3
Review of Environmental Monitoring
Procedures
The monitoring works conducted by the Environmental Team were inspected regularly. The observations for the monitoring works were recorded and summarized as follows:
Air Quality Monitoring
§
The monitoring team recorded the observations
around the monitoring stations within and outside of the construction site.
§
The monitoring team recorded the temperature,
air pressure and general weather condition on the monitoring day.
Noise Monitoring
§
The monitoring team recorded the observations
around the monitoring station, which might affect the results.
§
Major noise sources were identified and
recorded.
Water Quality Monitoring
· The monitoring team recorded the observations around the monitoring stations, which might affect the results.
7.4
Assessment of Environmental Monitoring
Results
All monitoring results were audited against the Action and Limit levels and any exceedances would be validated.
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.
No exceedances were recorded in air quality and noise monitoring in this reporting month.
The monitoring results in this reporting period were comparable with those of baseline period. Detailed discussions were given in Section 2, 3 and 4 of this Report.
7.5
Advice on the Solid and Liquid Waste Management Status
The Contractor should provide
sufficient preventive measures during equipment maintenance works so as to
avoid oil leakage on the ground. In the event of any oil leakage, the
Contractor should clean up the polluted soil and handle all the materials used
for this cleaning works as chemical waste.
Concrete bundings were erected
outside the CEDD combined reception office and near the automatic wheel washing
facilities for storing generator sets and oil drums. The drain outlet of all
the bunded areas should be plugged properly. Besides, pre-cast drip trays were
provided for oil drums at several areas, such as workshop and chemical storage
area. The Contractor should collect and dispose of any stagnant water
accumulated in the concrete bunding and drip trays and handle them as chemical
waste.
The Contractor should use
suitable containers with proper labels to store chemical wastes in accordance
with Code of Practice on the Packaging, Labeling and Storage of Chemical Waste.
The Contractor should also advise their workers of the proper procedures in
handling the chemical waste. All the trip tickets for chemical waste disposal
were properly kept in the site office. No chemical waste disposal was
undertaken in the reporting month.
The Contractor was reminded to
increase the frequency of inspection and cleaning of the site drainage system,
including permanent desilting chambers, desilting facilities, oil interceptor
bypass tank, DP3 and DP4 and all the trapezoidal channels. Moreover, the
Contractor should apply pesticides in the stagnant water ponds.
All the runoff from the
parking area should be pumped to the desilting facilities and oil interceptors
to remove suspended solids and oil & grease prior to discharge.