Acid sulfate soil manual

Soils are considered potential acid sulfate soils if the sulfide material is waterlogged mineral, organic, or mixed soil material with a pH of or higher and, if incubated as a 1-cm thick layer under moist, aerobic conditions (field capacity) at room temperature, shows a drop in pH of or more units to a pH value of or less within 16 weeks or longer, if the pH is still dropping after 16 weeks, until the pH reaches a . The formation of acid sulfate soils (ASS) materials occurs under waterlogged conditions in the presence of no or minimal oxygen. Under these anaerobic conditions, sulfate-reducing bacteria in the soil materials convert dissolved sulfate present in the pore water into Reduced Inorganic Sulfur (RIS). The term acid sulfate soils (ASS) refers to soils that contain iron sulfides which, when exposed to oxygen, generate sulfuric acid. Any lowering of the watertable or physical disturbance of the soil in potential ASS areas will result in the exposure of the iron sulfide sediments to oxygen, which react to form sulfuric acid, hence the term ‘acid sulfate soils’. This acid can leak into.

Acid Sulfate Soil Potential. In NSW, development of land subject to ASS occurrence is managed at a planning level in accordance with the Acid Sulfate Soil Manual prepared by the Acid Sulfate Soil. Acid Sulfate Soils Assessment Management. The presence of acid sulfate soils can be a significant constraint on planning at regional and local levels, introducing restrictions on land use and development options. Within areas of (suspected) acid sulfate soils, many construction or engineering activities warrant an assessment of the risk. National acid sulfate soils sampling and identification methods manual Publication details Prepared by Leigh Sullivan (Federation University), Nicholas Ward, Nadia Toppler and Graham Lancaster (Southern Cross University) on behalf of the Department of Agriculture and Water Resources,

Queensland Acid Sulfate Soil Technical Manual Soil Management Guidelines v (). National Acid Sulfate Soils Guidance: National acid sulfate soils sampling and identification methods manual Water Quality Australia 45 understanding of the soil properties and behaviour on the site, especially with respect to the acidity. National acid sulfate soils sampling and identification manual Sullivan et al. (b) outlines the first three stages of an ASS investigation process – desktop assessment (Stage 1), site inspection.