3.1
Air quality monitoring, including
1-hr and 24-hr TSP, was conducted three times a week and once a week respectively,
in accordance with the EM&A Manual.
3.2
The weather was generally dry during
the reporting period. The monitoring data and trend of air quality for the
reporting quarter are given in Appendix E. Major dust sources of the temporary
CWSF were dump truck traffic, dumping and sorting activities inside the CWSF.
Other dust sources were the dump truck traffic inside and outside of the Fill
Bank.
3.3
There was no
3.4
Table 3.1 presents the number of exceedances
recorded in each month of the reporting quarter. The number of monitoring
events included regular monitoring events and additional ones, if any.
Table 3.1
Summary of Number of Exceedances for 1-hr
& 24-hr TSP Concentration
|
Monitoring Parameter |
Level of Exceedance |
Month |
||
|
Nov 07 |
Dec 07 |
Jan 08 |
||
|
1-hr TSP |
No. of monitoring events |
12 |
12 |
15 |
|
Action |
0 |
0 |
0 |
|
|
Limit |
0 |
0 |
0 |
|
|
Total |
0 |
0 |
0 |
|
|
24-hr TSP |
No. of monitoring events |
4 |
5 |
4 |
|
Action |
0 |
0 |
0 |
|
|
Limit |
0 |
0 |
0 |
|
|
Total |
0 |
0 |
0 |
|
3.5
There were 14 site inspections
conducted in the reporting quarter to monitor the implementation of proper
environmental pollution control and mitigation measures for the Project. The
major concerns for the Project are air quality and waste management on site. Dust
emission during dumping activities, manual sorting of non-inert waste and dump
truck traffic were observed during site inspections, while general refuse and
chemicals were observed without proper collection.
3.6
The implementation status of
environmental mitigation measures are given in Appendix D.
3.7
Major dust sources in the temporary
CWSF would be the dumping activities, manual sorting of non-inert waste and
dump truck traffic inside the CWSF. Mitigation measures, including operation of
wheel-washing facilities had been implemented and the water sprinklers were installed
and the haul road was sufficiently dampened.
3.8
Besides the afore-said issues, the
Contractor was reminded to maintain the drainage systems regularly. It was
recommended to arrange additional maintenance for the silt trap at the wheel
washing bay and oil interceptor pump pit before and after rainstorms so as to
ensure their maximum treatment capacities.
3.9
The Contractor had obtained the
effluent discharge license on 13 November 2006.
Advice on Solid and Liquid Waste
Management Status
3.10
There was disposal of C&D waste and
chemical waste in the reporting quarter.
3.11
The Contractor was advised to
provide drip trays to all chemicals containers and implement sufficient
preventive measures, including placing tarpaulin sheets or drip tray on ground,
during equipment maintenance works to avoid oil leakage on the ground. In the
event of oil leakage, the Contractor should clean up the polluted soil and
dispose of as chemical waste.