Home WA 黑料正能量 Publications Wagerup Alumina Refinery Noise Amelioration Plan Wagerup Alumina Refinery Noise Amelioration Plan Guidance A noise amelioration plan for Alcoa's Wagerup alumina refinery. Last updated: 30 March 2022 Please download the document below. Documents Wagerup Alumina Refinery Noise Amelioration Plan (PDF, 1.72MB) Sidebar Published 30 March 2014 Provided by Department of Water and Environmental Regulation Share Copy URL