#23 The Basics: Acid Sulfate Soils

Below the Surface

Acid Sulfate Soils are a tricky subject. The second episode of our "The Basics" series is all about the ASS (oh this acronym is just endlessly amusing, isn't it?). Gunnar and James' guest is Laurie Fox, one of the most recognised and distinguished ASS experts not only in Australia, but globally. Aside from doing fantastic assessment and ASS management work on mind bogglingly big projects himself, Laurie is also committed to improving our industry's understanding of these soils.
This improvement pathway he is on involves not only industry talks like this one, but also a tireless commitment to liaison with and education of various regulators. People like Laurie are a rare breed, one that is vitally important to have in our industry. It is people like him who improve all of us.
This episode was recorded on 29 November 2024.

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The necessary disclaimer: The views, thoughts, and opinions expressed in this Podcast are the speakers’ own. They do not necessarily represent the views, thoughts, and opinions of 4Pillars Environmental Consulting Pty Ltd or any Client, Supplier or other party related to 4Pillars or the speakers.
(c) Gunnar Haid and James Hammond

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1. Intro and banter (00:00:00)

2. Acid Sulfate Soils are easy and difficult (00:01:12)

3. Christmas Break and ASSMAN discussion (00:04:22)

4. Laurie Fox Interview starts (00:06:00)

5. Australia leads the world (00:11:04)

6. What are coastal Acid Sulfate Soils (00:11:53)

7. Potential ASS and Actual ASS (00:16:57)

8. ASS Maps (00:18:03)

9. Current guidelines in NSW (2024) (00:21:12)

10. Action Criteria (00:27:03)

11. Net Acidity and its sub-acidities (00:28:11)

12. SPOCAS vs Chromium Suite (00:36:21)

13. Acid Neutralising Capacity ANC (00:39:14)

14. (Naturally) Acidic Soils vs Acid Sulfate Soils (00:44:05)

15. Lime is not benign (00:47:10)

16. Principles of ASS Treatment (00:48:40)

17. Re-use of ASS (00:51:43)