10 FUTURE KEY ISSUES

10.1 Key Issues for the Coming Month

10.1.1 Works to be taken for the coming monitoring period are described as follows:

i. booster pump house construction;

ii. excavation;

iii. traffic diversions;

iv. utilities diversions and installation;

v. viaduct finishing and surfacing,

vi. deck parapet erection and fixing;

vii. noise barrier erection and fixing;

viii. TCSS and E&M works; and

ix. sign gantry / traffic sign

10.1.2 Potential environmental impacts arising from the above construction activities are mainly associated with dust, noise, site run-off and waste. However, with the implementation of the following mitigation measures, potential impacts to the surrounding sensitive receivers could be minimized.

10.1.3 Construction Dust

i. frequently watering of haul road and unpaved areas;

ii. prohibition of any open burning on site;

iii. investigation of other dust sources near air sensitive receivers;

iv. regularly watering or covering of open areas and stockpiles with tarpaulin sheeting;

v. hydroseeding or covering inactive exposed soil areas with impervious sheeting if necessary;

vi. switching off vehicles and equipment while not in use; and

vii. regular maintenance of onsite machineries and vehicles.

10.1.4 Construction Noise

i. identification of noise sources arising within and outside work site; and

ii. follow-up of any exceedance caused by the construction works.

10.1.5 Construction Run-off

i. identification of sources of run-off from site;

ii. provision of sandbags/bunds/surface channels to direct run-off to silt/sand removal facilities;

iii. avoidance of direct discharge of construction wastewater into storm water drainage;

iv. provision of adequate treatment of construction wastewater and run-off prior to discharge; and

v. covering of exposed slope with tarpaulin or similar means during rainstorm.

10.1.6 Construction Waste Management

i. avoidance of accumulation of construction waste materials and/or general refuse on site;

ii. segregation of waste;

iii. collection of chemical waste or oil and disposal of as chemical waste in accordance with the relevant regulations; and

iv. regularly removing of waste materials on site.

10.2 Monitoring Schedule for the Coming Three Months

10.2.1 The tentative schedules for dust and noise monitoring for the next three months are attached in Appendix P.