The project involved the conversion of two existing bulk storage tanks 36m dia. X 10m high to primary oil separator tanks, operating at a flow rate of 36, 000 m3/d. the project involved conceptual design, CFD analysis (2D & 3D modelling of the flow patterns), detailed design, manufacture of all tank internals including 600 mm dia. Inlet pipe, oil coalescer vessel, underflow baffles, overflow weir troughs, oil skimmers and internal and external pipe work, supervision and inspection of subcontract installation works, testing and commissioning. In all, more than 100 tonnes of equipment requiring 7 x 40 ft containers was manufactured by SWA at its Sydney factory.