5.         CONCLUSIONS AND RECOMMENDATIONS

 

Conclusions

 

5.1               Environmental monitoring of air quality (1-hr TSP and 24-hr TSP) for the Project was performed in April 2006. There were two limit level exceedances in 24-hr TSP recorded at monitoring stations TKO1 and TKO2 in the reporting month.

 

5.2               Environmental site inspections were conducted 4 times in the reporting month. Due to the wet and windy weather condition, stagnant water was observed outside the site office and inside the trapezoidal channel after raining events. Fugitive dust was occasionally observed during material sorting. The Contractor had installed the sprinkler system at tipping hall by 27 April 2006, yet the water supply was still awaiting. Waste inside the trapezoidal channel had been cleared.

 

5.3               No complaints, prosecutions or notifications of summons were received in April 2006.

 

Recommendations

 

5.4               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 temporary CWSF;

·         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 by provision, operation and maintenance of automatic wheel washing facilities.

 

Construction Noise

 

·         Conduct noisy activities at a farther location from the NSR.

 

Water Quality

 

·         Maintain the drainage system, including the trapezoidal channels;

·         Operate and maintain the treatment system for the site toilet; 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 site regularly to avoid accumulation;

·         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 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, and

·         Provide a proper chemical waste store.

 

Landscape and Visual

 

·         Erect all the site hoardings/chaining fences in accordance with agreed design at proper location.