2.2 CONTROL OF SURFACE RUNOFF AND WATER QUALITY POLLUTION (SEA)

1. Install/construct sediment plume control systems, such as silt curtains and/or embankments, prior to reclamation/ dredging/excavation and cofferdam construction activities.

2. For Projects involving the construction of a cofferdam, install sheet piles for the construction of the cofferdam before commencing reclamation work.

3. Perform visual inspections regularly to determine whether maintenance is required. The following are recommendations for inspection and maintenance activities:

i. Check whether the silt curtain is twisted.

ii. Replace worn or broken anchor lines.

iii. Remove any solid waste/dirt caught on the silt curtain.

iv. Check for any signs of bund breaching

4. Construct runoff management and sediment control facilities i.e., temporary earth drains, sediment basin or silt traps, after backfilling works within the cofferdam area has reached desired levels.