Annex C

Measures to Mitigate Water Impacts during Operation

To mitigate the water quality impacts, the following mitigation measures shall be implemented:

Site Run-off

(a) Appropriate measure should be implemented to control site run-off thereby preventing high loading of suspended solids from entering the nearby reserve drainage system and other drainage systems in the vicinity. Proper site management shall be employed to minimize surface run-off and sewage effluents to nearby storm drains.

Site Drainage

(b) Interceptors installed to floor drains shall be properly used and maintained;

(c) Grating of an appropriate grate size over the surface channels shall be properly used and maintained;

(d) Removable vertical grates, in the surface channels at a frequency of one grate for every six market stalls, shall be properly used and maintained;

(e) Pyramid type grating above the outlet point with a hinged lid, together with vertical grates on either side of the pyramid trap shall be properly used and maintained;

(f) Removable sump bucket, under the pyramid grating, with drain hole shall be properly used and maintained;

(g) The drainage system shall be cleaned at a regular frequency using gully suckers or other appropriate equipment to ensure that the performance of the system is effective in removing solid materials.