10
RECOMMENDATIONS AND CONCLUSIONS
10.1.1
This Environmental Monitoring and Audit
(EM&A) report presents the EM&A works undertaken during the month from
10.1.2 A
total of 45 sets of measurements for
10.1.3 A
total of
10.1.4 A
total of 9 sets of 6 x Leq(5min) measurements in evening-time (i.e.
10.1.5 A
total of 9 sets of 4 x Leq(5min) measurements were taken in night-time (i.e. 2300 to
0700 next day) at three monitoring locations during the reporting period and no exceedances
were recorded.
10.1.6 A
total of
10.1.7 No
environmental complaints were received during the reporting period.
10.1.8
No notifications of summons nor
prosecution were received for this Contract since the commencement of
construction.
10.1.9
The environmental monitoring results indicated
that the site activities undertaken by CHEC during the reporting period
complied with the relevant environmental requirements. Areas of Improvement / site deficiencies were
identified by the ET and the IEC and the major issues identified on site were
related to contamination of ground by oil leakage and maintenance of drainage
systems. Appropriate immediate
corrective measures have been implemented by CHEC in accordance with the Deficiency
and Action Reporting Procedures and they were found to be acceptable.
10.2.1
According to the environmental audits undertaken
during the reporting period, the following recommendations have been made:
10.2.2
Construction Dust
i.
better watering coverage should be provided at
haul road and exposed areas to ensure the soil surface is in moist conditions;
ii.
water or dust suppression chemical continuously
should be sprayed on the surface where any pneumatic or power – driven
drilling, cutting, polishing or other dust emissive mechanical breaking
operations was undertaking; and
iii.
open stockpiles of
dusty material and demolished debris should be covered properly by tarpaulin or
spray with water to keep surface moist.
10.2.3
Construction Noise
i.
numbers / types of plant operating in the
restricted hour should follow the condition of Construction Noise Permits;
ii.
regular maintenance of machineries; and
iii.
noisy equipment should
be located away from nearby NSRs.
10.2.4
Water Quality
i.
all construction wastewater and surface run-off
should be diverted to appropriate water treatment facilities prior to
discharge;
ii.
de-silting facilities (sedimentation
tanks/chemical treatment plants) should have adequate capacity for settling
surface run-off;
iii.
wheel washing facilities should be installed at
all vehicular exits and used by all vehicles before leaving the construction
site;
iv.
surface run-off from the vehicular and plant
servicing area should be diverted to the perimeter channels with petrol
interceptor prior to discharge to storm drainage system;
v.
site hoarding / concrete barriers should be
tightly sealed at the bottom to prevent seepage of surface run-off from the
site;
vi.
accumulation of water in drip trays and at
chemical/fuel storage area should be avoided; and
vii.
complete temporary
drainage systems on site in accordance with the approved Comprehensive Drainage
Proposal.
10.2.5
Waste Management
i.
oil / petrol contaminated soil should be
collected and disposed of as chemical waste;
ii.
all types of waste should be collected by
licensed waste collectors; and
iii.
good housekeeping
should be implemented throughout the whole construction period.
10.2.6
Anti-mosquito breeding
i.
pondings and uneven
ground should be filled up and leveled;
ii.
construction plants and other items which may
retain water should be covered or treated in appropriate manner; and
iii.
all sedimentation
tanks, sump/soakaway pits and other receptacles which
may retain water should be sprayed with anti-mosquito repellent regularly.