This bulletin provides guidance to landowners, developers, consultants and other people involved in the disturbance of soil, sediment, rock and/or groundwater about identifying, classifying and managing acid sulfate soils and rock. Waste acid sulfate soils and rock must be managed in accordance with the requirements of the Industrial Waste Management Policy (Waste Acid Sulfate Soils) 1999 referred to as ‘the Policy’. This replaces publication 655, issued August 1999.