The Contract was commenced in July 2020. The works include:

• Construction of a secondary sewage treatment works (STW) with a design capacity of about 2,050 cubic metres per day (cubic metres/day) at Wo Mei and a secondary STW with a design capacity of about 140 cubic metres/day at Po Toi O;
• Construction of a sewage pumping station (SPS) with a design capacity of about 1,350 cubic metres/day at Wong Chuk Wan and a SPS with a design capacity of about 3,400 cubic metres/day at Tseng Lan Shue;
• Construction of about 2 kilometre (km) of rising mains in Wong Chuk Wan, Tseng Lan Shue and Po Toi O;
• Construction of about 17.5 km of gravity sewers in Wong Chuk Wan, Wo Mei, Heung Chung, Tseng Lan Shue, Sam Long, Tai Po Tsai and Po Toi O;
• Construction of about 0.39 km of submarine outfall at Po Toi O; and
• Ancillary works