
Soil Classified as PASS and How to Treat It On Site or In Situ
During excavation and earthworks, especially in coastal and low-lying areas across Australia, contractors may encounter soil classified as PASS (Potential Acid Sulfate Soil). While PASS may appear harmless when undisturbed, it can become highly problematic once exposed to air. Understanding what









Perfect Contracting acknowledges the Aboriginal and Torres Strait Isander people as Traditional Custodians of the country on which we live and work. We pay our respects to the Traditional Custodians and Elders past, present and future, and honour their connection to the land and ongoing contribution to society.