BP Australia Ltd. is to halve its workforce at the Kwinana refinery, south of Perth in Western Australia. Staff at the refinery will be cut to 200 people from the current 400. This represents a severe drop from the 1,000 employees working at the refinery in the mid-1990s. The move is part of an Australian downstream restructuring strategy aimed at keeping pace with the substantial cost improvements made by competing refineries in Southeast Asia.