Civil works for Sewage Treatment Facilities including Inlet Works No.1, Primary Senimentation Tanks No.1-4, Bioreactor No. 2A & 2B, Membrane Facilities Building No.2, SAS Pumping Station, auxiliary facilities (temporary chemical dosing system, concrete plinth for deodorisation systems, chemical systems no.1 and no.2, FS and sprikler pumping room, emergency generator house, street fire hydrant pump room and flowmeter chambers) and the associated works