More info and pictures: https://aus.social/@treevan/110293053188000541
One recipe:
Articles:
https://www.biochar-journal.org/en/ct/77-Planting-Urban-Trees-with-Biochar
https://stockholmtreepits.co.uk/ - https://www.researchgate.net/publication/341343983_Tree_Pits_with_Structural_Soils_-_Practice_Note_Version_12
Had to go digging to find what OP was talking about
https://www.theguardian.com/australia-news/2024/jan/29/asbestos-nsw-findings-watchdog-epa-contaminated-soil-childcare-centres-schools-parks
It’s not gardening soil, it’s “clean” fill for big landscaping projects, you wouldn’t replace it with rocks + biochar…
There was a radio piece saying that potting mix and cheap “soil mixes” may also be affected. The same thing people put into raised garden beds as cheap soil is wood-based/bark-based.
https://lemm.ee/post/33335568
Asbestos now found in sold soil. Whoops.
It’s the same type of soil I was talking about, not gardening soil…
And holy crap, you really don’t let go, do you?
Yes mate, we always get our clean fill from “garden stores”.
Soil
Fill
It’s in the article
Goodbye