7 CONCLUSIONS AND RECOMMENDATIONS
Conclusions
7.1 Environmental monitoring of air quality (1-hour TSP and 24-hour TSP) for the
Project was performed in February 2003. All the monitoring results complied with the
AL levels except four 24-hr TSP exceedances. Since all the 1-hr TSP monitoring
results complied with the AL levels, it indicated an acceptable air quality during the
operation hours of the Fill Bank. However, a poorer ambient air quality in the Fill
Bank could be interpreted from the 24-hr TSP monitoring results. The Contractor was
required to follow up all the mitigation measures as recommended in the EIA Report,
EP and EM&A Manual. At this stage, provision of covers or hydroseeding on the
exposed slopes and more frequent water spraying on the stockpiles and main haul
roads are recommended.
7.2 Impact noise level monitoring was performed on 21 February 2003. The monitoring
results complied with the limit level of 75dB. No complaint was received regarding
noise issue.
7.3 The water quality monitoring was conducted by the Reclamation Project in the
reporting month. Data was obtained continuously through CED. In the reporting
month, 8 action level exceedances were recorded. However, it was believed that the
exceedances were not caused by the operation of the Fill Bank because only a small
amount of surface runoff was discharged from the site and a sufficient desilting
system including provision of screening facilities and a permanent desilting chamber
in the trapezoidal channel was provided.
7.4 Environmental site inspections were conducted 4 times in the reporting month and
mitigation measures were generally implemented for the Project. ET had notified the
Contractor the observations and deficiencies, especially provision and maintenance of
drip trays, oil stain on bare ground and improper waste accumulation. The Contractor
was reminded to rectify the observations. Besides, as air quality exceedances were
recorded and they were believed to be attributable to the wind erosion on the
stockpiles, the Contractor was reminded to cover the exposed slopes and provide
sufficient water spraying on the stockpiles and haul roads.
7.5 No complaint, prosecution and notification of summons was received in February
2003. There had been three complaints received since commencement of the Project.
Recommendations
7.6 According to the environmental site inspections performed in the reporting month, the
following recommendations were provided:
Air Quality
• Increase the frequency of water spraying on haul roads, unloading areas and
stockpiles;
• Provide proper maintenance for the powered mechanical equipment to avoid
emission of dark smoke;
• Advise the truck drivers on the speed limit of 10km/hr;
• Cover the temporary slope facing north;
• Hydroseed completed slopes;
• Properly operate and maintain the wheel washing bay; and
• Install hard paved haul roads.
