PASS - Potential Acid Sulfate Soil is potentially toxic if not treated properly - then it becomes ASS
I'm sure you would not want a few thousand tonnes of PASS on your property
You keep scraping the bottom of the credibility barrel dbl Acid sulfate soils
Acid sulfate soils are natural sediments that contain iron sulfides. They are common along the NSW coast. When disturbed or exposed to air these soils can release acid, damaging built structures and harming or killing animals and plants. Impacts
Left undisturbed, acid sulfate soils do not present any risk. But when they are exposed to air, the iron sulfides they contain react with oxygen to create sulfuric acid.
The acid makes metals in the soil, such as iron and aluminium, more soluble. These metals can be released in toxic amounts.
The acid and released metals can have many damaging effects:
Damaging waterways and killing aquatic life – Rainfall can wash acid and toxic metals into waterways, killing organisms that are immobile (such as oysters) or that live in sediment. It can also reduce survival and growth rates of plants and animals, and promote outbreaks of disease (especially red-spot disease in fish).
Killing plants – Very acidic soil can kill all plants growing in it.
Corrosion – Sulfuric acid can corrode concrete, iron, steel and some aluminium alloys.
Toxic water and dust – Acid sulfate soil and water can irritate your skin and eyes. Drinking acidic water may make animals ill.
Acid sulfate soils have economic impacts on most industries on the NSW coast, including:
recreational fishing
commercial fishing
oyster growing and other aquaculture
cropping
grazing
dairying.
NAG Price at posting:
6.6¢ Sentiment: Buy Disclosure: Held
